CN120369054A - Portable cardiopulmonary resuscitation machine calibrating device - Google Patents
Portable cardiopulmonary resuscitation machine calibrating deviceInfo
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- CN120369054A CN120369054A CN202510867940.9A CN202510867940A CN120369054A CN 120369054 A CN120369054 A CN 120369054A CN 202510867940 A CN202510867940 A CN 202510867940A CN 120369054 A CN120369054 A CN 120369054A
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Abstract
本发明提供一种便携式心肺复苏机校准装置，属于心肺复苏技术领域；包括：外框、内框和按压自动回弹部，所述内框稳定安装于外框内，所述按压自动回弹部处于内框内，所述按压自动回弹部的底部与外框一端稳定安装，顶部与外框另一端平齐；所述按压自动回弹部内设有激光测距模块、频率检测模块、AD转换电路模块和电源转换电路模块。本发明通过激光测距模块、频率检测模块、AD转换电路模块以及按压自动回弹部的配合，达到了获取高精度按压深度和频率数据的目的，实现了为心肺复苏机校准提供可靠数据支持，提升校准准确性的效果。
The present invention provides a portable cardiopulmonary resuscitation machine calibration device, which belongs to the field of cardiopulmonary resuscitation technology; it comprises: an outer frame, an inner frame and a press-to-rebound part, the inner frame is stably installed in the outer frame, the press-to-rebound part is in the inner frame, the bottom of the press-to-rebound part is stably installed with one end of the outer frame, and the top is flush with the other end of the outer frame; the press-to-rebound part is provided with a laser distance measurement module, a frequency detection module, an AD conversion circuit module and a power conversion circuit module. The present invention achieves the purpose of obtaining high-precision pressing depth and frequency data through the cooperation of the laser distance measurement module, the frequency detection module, the AD conversion circuit module and the press-to-rebound part, and realizes the effect of providing reliable data support for the calibration of the cardiopulmonary resuscitation machine and improving the calibration accuracy.
Description
Technical Field
The invention relates to the technical field of cardiopulmonary resuscitation, in particular to a portable cardiopulmonary resuscitation machine calibration device.
Background
Cardiopulmonary resuscitation is an important emergency measure for rescuing patients suffering from sudden cardiac arrest of respiration, and a cardiopulmonary resuscitation machine plays a key role in the emergency process. With the continuous development of medical emergency techniques, the performance requirements of the cardiopulmonary resuscitation machine are higher and higher. Accurate compression depth and frequency are key indicators of the effectiveness of a cardiopulmonary resuscitation machine, which requires regular calibration of the cardiopulmonary resuscitation machine to ensure that its performance meets the criteria.
Currently, in the field of cardiopulmonary resuscitation machine calibration, traditional compression depth measurement relies on steel ruler visual inspection, and frequency is counted manually. This approach is not only inefficient, but also has a large error. Due to the influence of human factors, measurement results of different operators may be different, so that the calibration of the cardiopulmonary resuscitation machine is not accurate enough, and the effectiveness of the device in actual use cannot be ensured.
Disclosure of Invention
The invention aims to provide a portable cardio-pulmonary resuscitation machine calibration device to solve the technical problems in the background technology.
The portable cardiopulmonary resuscitation machine calibration device comprises an outer frame, an inner frame and an automatic pressing rebound part, wherein the inner frame is arranged in the outer frame, the automatic pressing rebound part is integrated in the inner frame, the bottom of the automatic pressing rebound part is connected with one end of the outer frame, and the top of the automatic pressing rebound part is level with the other end of the outer frame;
the automatic pressing rebound part includes:
The laser ranging module is arranged on the automatic pressing rebound part and is used for measuring the pressing depth of the cardiopulmonary resuscitation machine;
The pressure detection module is arranged on the automatic pressing rebound part and is used for detecting the pressing force when the cardiopulmonary resuscitation machine is pressed;
The frequency detection module is arranged on the automatic pressing rebound part and is used for measuring the pressing frequency of the cardiopulmonary resuscitation machine;
The AD conversion circuit module is used for converting analog signals acquired by the laser ranging module, the frequency detection module and the pressure detection module;
The power conversion circuit module is used for providing a stable power supply for the whole calibrating device, wherein the outer frame is provided with a drawing handle, a universal wheel, a binding band buckle and the like, the drawing handle and the universal wheel are used for conveniently moving the equipment, the binding band buckle is used for providing the connection position of the cardiopulmonary resuscitation machine and the equipment, and the side wall of the inner frame can be additionally provided with a balancing weight.
In a further embodiment, the pressing automatic rebound part further includes:
The bottom plate is arranged in the outer frame;
The detection platform is arranged right above the bottom plate;
the main support is positioned between the bottom plate and the detection platform, and comprises two groups of connecting rods which are mutually crossed and rotationally connected, and the crossed connecting point is positioned at the center of the connecting rods in the length direction;
The guide rails are arranged on the bottom plate and the detection platform, and the guide rails on the bottom plate and the detection platform are symmetrical with the center points of the bottom plate and the detection platform;
the sliding block is connected to the guide rail and is rotationally connected with one end of the connecting rod;
The buffer is arranged on the detection platform through a buffer bracket and is used for avoiding vibration and noise;
One end of the hook spring is connected with the detection platform through a hook spring bracket, and the other end of the hook spring is connected with one end of a connecting rod on the detection platform.
In a further embodiment, a lithium battery and a microcontroller are further installed in the automatic pressing rebound part, wherein the capacity of the lithium battery meets the continuous working requirement of the device in a certain time, the automatic pressing rebound part has the functions of overcharge and overdischarge protection and prevents battery damage and safety accidents, the operation speed and the storage capacity of the microcontroller meet the requirements of data processing and storage, the automatic pressing rebound part has certain anti-interference capability and can stably work in a complex electromagnetic environment, and the working temperature range of the microcontroller is adapted to the use environment of the device to ensure that the automatic pressing rebound part can normally operate under different temperature conditions.
In a further embodiment, the inner frame is provided with a power switch and a charging interface, the power switch is used for controlling the power on-off of the whole calibration device, the charging interface is used for connecting an external power supply to charge a lithium battery installed in the automatic rebound part, the power switch has waterproof and dustproof functions, the protection level of the power switch meets the relevant standards, moisture and dust are prevented from entering the switch to cause faults, the charging interface supports a quick charging technology, the battery state can be automatically detected in the charging process, the charging current and the charging voltage can be adjusted, the charging safety and efficiency are ensured, the installation positions of the power switch and the charging interface are convenient to operate and observe, and certain safety distance is kept between the power switch and other parts to prevent mutual interference.
In a further embodiment, an ADR433B chip, an AD5542C chip and an OP97A chip are arranged in the AD conversion circuit module; the pin 2 of the ADR433B chip is connected with a VCC power supply and is grounded through capacitors C1 and C2 which are connected in parallel, filtering effect is achieved, input power supply stability is guaranteed, the pin 4 is directly grounded, the pin 6 outputs reference voltage VREF, on one hand, the reference voltage VREF is grounded after being connected to the capacitors C3 and C4 and is further stabilized, on the other hand, the pin 6 connected to the AD5542C chip is used for providing reference voltage for the AD5542C, the pin 5 is suspended and is not connected, the pins 1,3 and 8 are empty pins and are not connected, the pin 14 of the AD5542C chip is connected with the VCC power supply, the pin 12, the pin 3 and the pin 4 are directly grounded and are respectively used for connecting digital ground and analog ground, the digital circuit and the analog circuit are guaranteed not to interfere with each other, the pin 6 is connected with the reference voltage VREF output by the ADR433B chip, the pin 9 is empty pin and is not connected with the clock signal 1-1, the pin 7 is connected with the chip selection signal CS1-1, the pin 10 is used for inputting data, the pin 11 is used for loading data control, the converted analog signal is output by the pin 2, the pins 3 is connected to the OP97A chip, the pin 3 and the pin 1 and the pin 3 and the pin 4 are connected with the AD chip and the pin 13 is connected with the voltage VREF and the voltage C3, and the stable circuit is connected with the voltage VREF and the voltage C3 and the output by the voltage C3 and the stable circuit and the voltage C3 is required to meet the temperature requirements of the output of the voltage CQC and the C3. The conversion speed and precision of the AD5542C chip should meet the data processing requirement of the device, the interface standard of the AD5542C chip should be compatible with the microcontroller, the amplification factor and bandwidth of the OP97A chip should be reasonably selected according to the signal processing requirement, the AD5542C chip has the characteristics of low noise and low distortion, the wires connected with the chips should be shielded, the influence of external electromagnetic interference on signal transmission is avoided, meanwhile, the layout of the circuit board should follow the related design specification, and the crosstalk between signals is reduced.
In a further embodiment, a CH5619 chip is arranged in the power conversion circuit module, a pin 5 of the CH5619 chip is connected with a +12v power supply filtered by a parallel capacitor CIN and a C1 to provide an input voltage for the chip, a pin 1 is directly grounded to ensure that a circuit has a stable reference potential, a pin 3 is connected with a switching signal to control whether the chip works, when the pin receives a high-level signal, the chip is turned on and a low-level is turned off, a pin 4 outputs the switching signal and is connected to an inductor L, the voltage is converted and stably output a power supply of 5V/5A to a load by matching with a diode D1 and an output capacitor COUT, a resistor R1 and a resistor R2 are connected to the inside of the chip to adjust the output voltage, the CFF capacitor is connected with the R2 in parallel to play a role of frequency compensation, stability and dynamic response performance of the circuit are improved, wherein the input voltage range and the output current of the CH5619 chip meet the power supply requirements of the device and can stably work under different load conditions, the capacity and the value of the parallel capacitor CIN and the C1 are connected to the inductor L, the capacity and the capacitor C1 are selected according to the energy storage and energy release characteristics of the inductor, the capacitor D and the output capacitor COUT are matched with the diode D1 and the output capacitor COUT, the voltage is regulated by the capacitor D1, the filter capacitor is regulated by the capacitor 2, the frequency compensation effect is guaranteed, the stability is improved, the stability and the stability of the circuit is ensured, the stability and the dynamic response performance is ensured, the input and the capacity is stable, the input voltage of the chip is and the input and the capacity can be stable and the voltage is stable.
In a further embodiment, the microcontroller is further provided with a data storage module, the data storage module is used for storing the pressing depth data of the cardiopulmonary resuscitation machine acquired by the laser ranging module, the pressure data detected by the pressure detection module, the pressing frequency data acquired by the pressing frequency detection module and the digital signal data converted by the AD conversion circuit module, wherein the storage capacity of the data storage module is selected according to the use requirement of the device to ensure that a sufficient amount of measurement data can be stored, the reading and writing speed of the data storage module is required to meet the data processing requirement of the microcontroller and has certain anti-interference capability to prevent data from being lost or damaged, a communication protocol between the microcontroller and the data storage module is required to adopt a reliable protocol, such as an SPI protocol or an I2C protocol, so that the accuracy and stability of data transmission are ensured, and the data storage module is required to have the functions of data verification and error correction, and the reliability of the data is improved.
In a further embodiment, a communication module is further arranged in the automatic pressing rebound part, a USR-WIFI232 chip is arranged in the communication module, a pin 16 of the USR-WIFI232 chip is connected with a 3.3V power supply to supply power to the module, and meanwhile, the automatic pressing rebound part is grounded through a capacitor C4 to play a role of filtering, so that the stability of the power supply is ensured; the pin 17 and the pin 18 are grounded and respectively used for being connected with the digital ground and the isolation, the pin 2 is connected with a power supply and used for supplying power to an internal digital circuit, the pin 4 and the pin 5 are respectively serial port transmitting and receiving pins, the pin 4 is connected with a serial port receiving end of external equipment through a resistor R31, the pin 5 is connected with a serial port transmitting end of the external equipment through a resistor R34 and used for realizing serial port communication data transmission, the pin 3, the pin 6 and the pin 9 are functional pins and respectively connected with an external control circuit or a pull-up/pull-down resistor, the pin 6 is a reset pin and is effective in a low level and used for resetting a module, the pin 9 is connected with the external circuit and used for realizing reset control of a WIFI function, the pin 7 and the pin 8 are serial port hardware flow control pins, the pin 10 is a WIFI connection state indicating pin and can be connected with an indicator lamp circuit and used for displaying the WIFI connection state of the module, the pin 11 is a module busy state indicating pin and can be connected with a related circuit to judge whether the module is in a busy state, wherein the communication distance and the USR-WIFI232 chip can meet the data transmission requirement of the device and can work stably under a certain interference environment. The capacity and the withstand voltage of the capacitor C4 are selected according to the power supply characteristic, the filtering effect is ensured, the resistance values of the resistors R31 and R34 are reasonably selected according to the serial port communication requirement, the signal transmission quality is ensured, an external control circuit connected with the functional pins accords with the electrical characteristic requirement of the chip, the resistance value of the pull-up/pull-down resistor is in a proper range, and the indication lamp connected with the WIFI connection state indication pin and the module busy state indication pin has an obvious indication effect, so that the operation personnel can observe conveniently.
In a further embodiment, the microcontroller is provided with an MCU chip, a 5V voltage stabilizing circuit, a 3.3V voltage stabilizing circuit, a voltage boosting circuit and a voltage dividing circuit, wherein the model of the MCU chip is selected according to the functional requirement and the performance requirement of the device, the MCU chip has enough operation capability and peripheral interfaces, the output voltage precision of the voltage stabilizing circuit is required to meet the requirement of the MCU chip and has certain load adjustment capability, the conversion efficiency and the output voltage range of the voltage boosting circuit and the voltage dividing circuit are required to meet the working requirements of other modules and can stably work under different load conditions, and the voltage stabilizing circuit, the voltage boosting circuit and the voltage dividing circuit are required to have the functions of overvoltage protection, overcurrent protection and the like, so that the circuit is prevented from faults.
In a further embodiment, the laser ranging module is installed between two sliders on the bottom plate, the laser ranging module slides along the two sliders on the bottom plate, wherein a connecting structure between the laser ranging module and the sliders should have certain rigidity to prevent shaking or displacement in the sliding process, an installation position of the laser ranging module should be on a central line of the bottom plate or a position of the laser ranging module is accurately calculated to ensure accuracy of a measurement result, an installation angle of the laser ranging module should meet measurement requirements, calibration and debugging are performed after installation to ensure measurement accuracy, and the sliders on which the laser ranging module is installed should have the same movement characteristics as other sliders to avoid measurement errors caused by slider differences.
The heart-lung resuscitation device has the beneficial effects that 1, the laser ranging module accurately measures the pressing depth of the heart-lung resuscitation device through the cooperation of the laser ranging module, the frequency detection module, the AD conversion circuit module and the pressing automatic rebound part, the frequency detection module accurately measures the pressing frequency, the AD conversion circuit module converts analog signals acquired by the laser ranging module, the frequency detection module and the AD conversion circuit module into digital signals, the purpose of acquiring high-precision pressing depth and frequency data is achieved, reliable data support is provided for the calibration of the heart-lung resuscitation device, and the effect of improving the calibration accuracy is achieved.
The bottom plate, the testing platform, the main support frame, the guide rail, the sliding block, the buffer and the hook spring of the automatic rebound part are mutually matched, the cross rotation of the main support frame is connected with the symmetrical distribution of the guide rail sliding block, the automatic rebound part can be adapted to the pressing of the cardiopulmonary resuscitators with different specifications, the hook spring realizes automatic rebound, the buffer avoids vibration and noise, the purpose of stabilizing the pressing descending height and rebound position is achieved, the stable environment is created for measurement, and the effect of measuring accuracy and stability is improved.
The CH5619 chip, the parallel capacitors CIN and C1, the inductor L, the diode D1, the output capacitor COUT, the feedback resistors R1 and R2 and the like in the power conversion circuit module are mutually matched, the CH5619 chip converts a +12V power supply into a 5V/5A stabilized power supply, and all the elements work cooperatively to stabilize the output voltage, so that the aim of providing the stabilized power supply for the whole calibration device is achieved, the normal operation of all the modules of the device is guaranteed, and the service life of equipment is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an expanded view of fig. 1.
Fig. 3 is a schematic structural view of the pressing automatic rebound part.
Fig. 4 is a schematic view of the connection of the hook spring.
Fig. 5 is a schematic general block diagram of the circuit of the present invention.
Fig. 6 is a schematic structural diagram of an MCU chip.
Fig. 7 is a schematic diagram of circuit connection between the laser ranging module and the dividing ground.
Fig. 8 is a schematic diagram of connection of the frequency detection module circuit.
Fig. 9 is a schematic circuit connection diagram of the Zigbee-LRF215A-PA module.
FIG. 10 is a schematic diagram of the connection of memory module circuits.
FIG. 11 is a schematic diagram of a connection of a 5V voltage regulator circuit.
Fig. 12 is a schematic diagram of the connection of the battery charging circuit.
Fig. 13 is a schematic diagram of connection of the booster circuit.
Fig. 14 is a schematic diagram of connection of the voltage dividing circuit.
FIG. 15 is a schematic diagram of a 3.3V voltage regulator circuit.
Fig. 16 is a schematic diagram showing connection of the AD conversion circuit module.
Fig. 17 is a schematic diagram of connection of the power conversion circuit.
Fig. 18 is a schematic diagram of connection of the signal transmission circuit.
Fig. 19 is a connection schematic diagram of the upper computer.
The reference numerals in the figure are 1, an outer frame, 2, an inner frame, 3, a pressing automatic rebound part, 301, a bottom plate, 302, a detection platform, 4, a main support frame, 5, a guide rail, 6, a sliding block, 7, a laser ranging module, 8, a buffer, 9, a lithium battery, 10, a microcontroller, 11, a frequency detection module, 12, a power switch, 13, a charging interface, 14, a hook spring, 15 and a pressure detection module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1-19, a portable cardiopulmonary resuscitation machine calibration device comprises an outer frame 1, an inner frame 2 and a pressing automatic rebound part 3, wherein the inner frame 2 is arranged in the outer frame 1, the pressing automatic rebound part 3 is integrated in the inner frame 2, the bottom of the pressing automatic rebound part 3 is connected with one end of the outer frame 1, and the top is level with the other end of the outer frame 1;
the automatic pressing rebound part 3 includes:
The laser ranging module 7 is arranged on the automatic pressing rebound part 3 and is used for measuring the pressing depth of the cardiopulmonary resuscitation machine;
the pressure detection module 15 is mounted on the automatic pressing rebound part 3, and the pressure detection module 15 is used for detecting the pressing force when the cardiopulmonary resuscitation machine is pressed;
A frequency detection module 11, which is installed on the automatic compression rebound part 3 and is used for measuring the compression frequency of the cardiopulmonary resuscitation machine;
The AD conversion circuit module is used for converting analog signals acquired by the laser ranging module 7, the frequency detection module 11 and the pressure detection module 15;
and the power supply conversion circuit module is used for providing stable power supply for the whole calibration device.
The outer frame 1, the inner frame 2 and the automatic pressing rebound part 3 are matched with each other to form a stable structure. The laser ranging, frequency detection, AD conversion and power conversion circuit module in the automatic rebound part 3 is pressed to work cooperatively, the pressing depth and frequency of the cardiopulmonary resuscitation machine are accurately measured, the acquired analog signals are converted, a stable power supply is provided for the whole device, and key support is provided for calibration work.
The automatic pressing rebound part 3 further includes:
a bottom plate 301 installed in the outer frame 1;
the detection platform 302 is arranged right above the bottom plate 301;
The main support frame 4 is positioned between the bottom plate 301 and the detection platform 302, the main support frame 4 comprises two groups of connecting rods which are mutually crossed and rotatably connected, and the crossed connecting points are positioned at the center of the connecting rods in the length direction;
The four guide rails 5 are arranged, the four guide rails 5 are respectively arranged on the bottom plate 301 and the detection platform 302, and the guide rails 5 on the bottom plate 301 and the detection platform 302 are symmetrical with the center points of the bottom plate 301 and the detection platform 302;
The sliding block 6 is connected to the guide rail 5, and the sliding block 6 is rotationally connected with one end of the connecting rod;
a buffer 8 mounted on the detection platform 302 by a buffer bracket, the buffer 8 being for avoiding vibration and noise;
One end of the hook spring 14 is connected with the detection platform 302 through a hook spring bracket, and the other end is connected with one end of a connecting rod on the detection platform 302.
The structure comprising the bottom plate 301, the detection platform 302, the main support frame 4, the guide rail 5, the sliding block 6, the buffer 8 and the hook spring 14 forms a structure similar to a lifting platform, has the characteristics of stable pressing descending height, accurate rebound position, long service life, small deformation quantity of the hook spring 14, difficult damage and the like, and can flexibly adapt to the pressing of the pressing automatic rebound part 3 when pressing of cardio-pulmonary resuscitation machines with different specifications by utilizing the main support frame 4 and the symmetrically distributed guide rail 5 sliding block 6 which are in cross rotation connection, so that the buffer 8 effectively avoids vibration and noise, and ensures the accuracy and stability of measurement.
A lithium battery 9 and a microcontroller 10 are also installed in the automatic pressing rebound part 3.
The effect of providing mobile power supply and core control capability for the calibration device is achieved, the lithium battery 9 provides power support for the device, the device can work normally under the condition of no external power supply, and the microcontroller 10 is responsible for data processing, analysis and coordination control of all modules, so that the whole calibration process is guaranteed to be carried out orderly.
The inner frame 2 is provided with a power switch 12 and a charging interface 13, the power switch 12 is used for controlling the power on-off of the whole calibration device, and the charging interface 13 is used for connecting an external power supply to charge the lithium battery 9 arranged in the automatic rebound part 3.
The portable control and safe charging effect of the power supply of the calibration device is achieved, the power switch 12 controls the on-off of the power supply, the power supply is convenient for operators to turn on and off the device, the charging interface 13 is connected with an external power supply to charge the lithium battery 9, the portable lithium battery has waterproof and dustproof functions, rapid charging and automatic battery state detection are supported, and the safety and charging efficiency of the power supply are guaranteed.
An ADR433B chip, an AD5542C chip and an OP97A chip are arranged in the AD conversion circuit module; the pin 2 of the ADR433B chip is connected with a VCC power supply and is grounded through capacitors C1 and C2 which are connected in parallel, filtering is achieved, the stability of the input power supply is guaranteed, the pin 4 is directly grounded, the pin 6 outputs a reference voltage VREF, the reference voltage VREF is grounded after being connected to the capacitors C3 and C4 and further stabilized, the pin 6 connected to the AD5542C chip is used for providing the reference voltage for the AD5542C, the pin 5 is suspended and is not connected with the pins 1,3 and 8, the pin 14 of the AD5542C chip is connected with the VCC power supply, the pin 12, the pin 3 and the pin 4 are directly grounded and are respectively used for connecting digital ground and analog ground, the digital circuit and the analog circuit are guaranteed not to interfere with each other, the pin 6 is connected with the reference voltage VREF output by the ADR433B chip, the pin 9 is not connected with the pins, the pin 8 is connected with a clock signal CLK1-1, the pin 7 is connected with a chip selection signal CS1-1, the pin 10 is used for inputting data, the pin 11 is used for loading data control, the converted analog signal is output from the pin 2, the pins 3 connected with the OP97A chip is connected with the pins 3 and the pins 1 and the pins 3 and the pins 4 are connected with the output by the OP97A chip and the power supply circuit and the output by the OP 3 and the feedback circuit and the input signal 3 and the OP 4 is matched with the input to the input signal 3 and the power supply circuit and the output the analog signal and the output from the OP 3A chip and the power supply and the output signal and the power supply is processed.
The ADR433B chip, the AD5542C chip and the OP97A chip are matched with each other, the ADR433B provides stable reference voltage, the AD5542C converts the analog signal into a digital signal, the OP97A processes the converted signal, the accuracy and the stability of signal conversion are ensured, and reliable data are provided for subsequent data processing.
The power conversion circuit module is internally provided with a CH5619 chip, a pin 5 of the CH5619 chip is connected with a +12V power supply filtered by a parallel capacitor CIN and a C1 to provide input voltage for the chip, a pin 1 is directly grounded to ensure that a circuit has stable reference potential, a pin 3 is connected with a switching signal to control whether the chip works, when the pin receives a high-level signal, the chip is turned on, and when the pin receives a low-level signal, the chip is turned off, a pin 4 outputs the switching signal and is connected to an inductor L, the voltage is converted and stably outputs a power supply of 5V/5A to a load by matching with a diode D1 and an output capacitor COUT, a feedback circuit is formed by resistors R1 and R2, the feedback circuit is connected to the inside of the chip to regulate the output voltage, and the CFF capacitor is connected with R2 in parallel to play a role of frequency compensation, and stability and dynamic response performance of the circuit are improved.
The power supply calibration device has the advantages that the effect of providing stable and adaptive power supply for the calibration device is achieved, the CH5619 chip converts the +12V power supply into the stable power supply of 5V/5A, and the stability and dynamic response performance of the power supply are guaranteed through measures such as filtering, feedback adjustment and frequency compensation, so that the power consumption requirement of each module of the device is met.
The microcontroller 10 is further provided with a data storage module, which is used for storing the cardiopulmonary resuscitation machine pressing depth data acquired by the laser ranging module 7, the pressure data detected by the pressure detection module 15, the pressing frequency data acquired by the pressing frequency detection module 11, and the digital signal data converted by the AD conversion circuit module.
The structure realizes the effects of data storage and management, the data storage module in the microcontroller 10 stores the data collected by the laser ranging module 7 and the pressing frequency detection module 11 and the digital signal data converted by the AD conversion circuit module, so that the subsequent analysis, inquiry and traceability of the calibration data are convenient, the data support is provided for the evaluation of the calibration result, and the pressure detection module 15 adopts a film pressure sensor and can also adopt a resistance pressure sensor.
The automatic pressing rebound part 3 is internally provided with a communication module, a USR-WIFI232 chip is arranged in the communication module, a pin 16 of the USR-WIFI232 chip is connected with a 3.3V power supply to supply power to the module, meanwhile, the electric power is grounded through a capacitor C4 to play a role in filtering, the stability of the power is guaranteed, a pin 17 and a pin 18 are grounded and respectively used for being connected with a digital ground and an isolated ground, a pin 2 is connected with the power supply to supply power for an internal digital circuit, a pin 4 and a pin 5 are respectively used for sending and receiving pins through serial ports, the pin 4 is connected with a serial port receiving end of external equipment through a resistor R31, the pin 5 is connected with a serial port sending end of the external equipment through a resistor R34 to realize the transmission of serial port communication data, a pin 3, a pin 6 and a pin 9 are respectively connected to an external control circuit or a pull-up/pull-down resistor, the pin 6 is a reset pin and is low-level effective and used for resetting the module, the pin 9 is connected to the external circuit to realize the reset control of the WIFI function, the pins 7 and 8 are serial port hardware flow control pins, the pin 10 is a serial port connection state indicator pin, the pin is a busy state indicator lamp and can be connected to the relevant circuit, and the module can be connected to the relevant circuit.
The USR-WIFI232 chip in the communication module realizes serial communication data transmission, the functional pins can perform reset, control and other operations, the pins 10 and 11 respectively indicate the WIFI connection state and the module state, so that operators can know the working state of the communication module conveniently, and the smoothness and stability of data transmission are ensured.
The microcontroller 10 is internally provided with an MCU chip, a 5V voltage stabilizing circuit, a 3.3V voltage stabilizing circuit, a boosting circuit and a voltage dividing circuit.
The power supply management and stable operation effects in the microcontroller 10 are realized, the MCU chip, the 5V voltage stabilizing circuit, the 3.3V voltage stabilizing circuit, the voltage boosting circuit and the voltage dividing circuit work cooperatively, the voltage stabilizing circuit ensures that the working voltage of the MCU chip is stable, the voltage boosting circuit and the voltage dividing circuit provide proper working voltages for other modules, and the stable operation of the microcontroller 10 and the whole device is ensured.
The laser ranging module 7 is installed between the two sliding blocks 6 on the base plate 301, and the laser ranging module 7 slides along the two sliding blocks 6 on the base plate 301.
The effect of accurate measurement of the laser ranging module 7 is realized, and the laser ranging module 7 is arranged between the two sliding blocks 6 on the bottom plate 301, so that the laser ranging module slides along with the sliding blocks 6, the change of the pressing depth can be measured more accurately, and the accuracy of the measuring position and the accuracy of the measuring result are ensured.
In the use process, firstly, the device is moved to the side of the cardiopulmonary resuscitation machine to be calibrated through a drawing handle and a universal wheel on the outer frame 1, and the device is fixed with the cardiopulmonary resuscitation machine by using a binding belt buckle; turning on the power switch 12 on the inner frame 2, pressing the lithium battery 9 in the automatic rebound part 3 to supply power to the whole device, and at the moment, initializing each module by the microcontroller 10; then, the pressing head of the cardiopulmonary resuscitation machine is attached to the detection platform 302 of the automatic pressing rebound part 3, the bottom plate 301 of the automatic pressing rebound part 3, the detection platform 302, the main support frame 4, the guide rail 5, the sliding block 6, the buffer 8 and the hook springs 14 work cooperatively, the cross rotation connection of the main support frame 4 and the symmetrical distribution of the sliding block 6 of the guide rail 5 enable the automatic pressing rebound part 3 to adapt to the pressing of cardiopulmonary resuscitation machines with different specifications, the hook springs 14 realize automatic rebound, and the buffer 8 avoids vibration and noise; in the pressing process, a laser ranging module 7 arranged between two sliding blocks 6 on a bottom plate 301 slides along the sliding blocks 6, the pressing depth is accurately measured, a frequency detection module 11 accurately measures the pressing frequency, a pressure detection module 15 detects the pressing force of a cardiopulmonary resuscitation machine during pressing, collected analog signals are transmitted to an AD conversion circuit module, an ADR433B chip, an AD5542C chip and an OP97A chip in the AD conversion circuit module are matched with each other, the ADR433B chip provides stable reference voltage, the AD5542C chip converts the analog signals into digital signals, the OP97A chip processes the converted signals, meanwhile, a CH5619 chip in the power conversion circuit module converts +12V power filtered by parallel capacitors CIN and C1 into a stable power supply of 5V/5A to supply power for the whole device, and a microcontroller 10 analyzes and processes the processed digital signals and processes the pressing depth data, in addition, the communication module in the automatic pressing rebound part 3 realizes data communication with external equipment through a USR-WIFI232 chip, a pin 4 and a pin 5 of the USR-WIFI232 chip respectively carry out data transmission with a serial port of the external equipment through resistors R31 and R34, a pin 10 and a pin 11 respectively indicate a WIFI connection state and a module busy state, finally, the data is transmitted to an upper computer through wireless, the upper computer distinguishes the transmitted data by adopting VisualTFT, displays the data in a real-time diagramming mode, records related data in the test process, and controls each submodule module to execute the specified function. Meanwhile, the upper computer supports online calibration parameters, and the calibrated parameters can be sent to the lower computer through instructions, so that the function of online real-time debugging equipment is realized. Meanwhile, the upper control also carries out designated operation on the data, and generates and displays a report in a designated format.
The graph expressed in the drawing is an example graph, and only aims to more intuitively show the key structure and the connection relation of the portable cardiopulmonary resuscitation device calibration device, and in practical application, the appearance and the size of the device can be adjusted and optimized according to specific requirements.
The whole working process of the portable cardiopulmonary resuscitation machine calibration device can be divided into a preparation stage, a data acquisition stage, a signal processing stage and a data management stage, wherein the stages work together with an electronic module through a mechanical structure, and the whole working process is as follows:
1. preparation phase device deployment and initialization
1. The physical connection and movement are that the device is moved to the side of the cardiopulmonary resuscitation machine by using a drawing handle and universal wheels on the outer frame 1, and the device is fixed with the cardiopulmonary resuscitation machine by a binding band buckle, so that the stability of the device in the calibration process is ensured.
2. And the power supply is started and the module is initialized, namely a power switch 12 on the inner frame 2 is pressed down, a lithium battery 9 (arranged in the automatic pressing rebound part 3) supplies power for the device, the microcontroller 10 is started, and the laser ranging module 7, the frequency detection module 11, the AD conversion circuit module and the communication module are sequentially initialized, so that the modules are ensured to enter a working state.
2. Data acquisition stage, real-time measurement of compression parameters
1. The mechanical structure responds to the pressing action that a pressing head of the cardiopulmonary resuscitation machine is attached to the detection platform 302 for pressing the automatic rebound part 3, when the cardiopulmonary resuscitation machine is pressed, the main support frame 4 is matched with the guide rail 5 and the sliding block 6 in a structure, so that the detection platform 302 moves downwards stably along the vertical direction to adapt to the pressure of pressing heads with different specifications, the automatic rebound after the pressing is realized through elastic force by the hook spring 14, and the buffer 8 reduces vibration and noise to ensure the stable measuring environment.
2. The multi-parameter synchronous acquisition comprises the steps that a laser ranging module 7 is arranged between sliding blocks 6 of a base plate 301, the pressing depth is measured in real time along with sliding of the sliding blocks 6, the accuracy can reach millimeter level, a frequency detection module 11 monitors the reciprocating motion frequency of a pressing head and records the pressing times per minute, and a pressure detection module 15 detects the pressure value applied by the pressing head and is realized through a film pressure sensor or a resistance pressure sensor.
3. Signal processing stage, analog signal digitization and data processing
1. The AD conversion circuit module processes signals, wherein analog signals output by the laser ranging, frequency and pressure module are transmitted to the AD conversion circuit module, an ADR433B chip provides stable reference voltage VREF, the stable signal standard is ensured after capacitive filtering, an AD5542C chip converts the analog signals into digital signals, a conversion time sequence is controlled through a clock signal CLK1-1 and a chip selection signal CS1-1, and an OP97A chip amplifies and filters the converted signals to reduce noise interference.
2. The microcontroller 10 processes and stores data, namely, after the microcontroller 10 receives the digital signals, the data such as original acquisition data of pressing depth, frequency and pressure, AD converted digital signal data, auxiliary information such as time stamp in the calibration process and the like are stored through a built-in data storage module (such as a W25Q64 chip). Meanwhile, the microcontroller 10 performs preliminary analysis on the data to determine whether the calibration standard range is met.
4. Data management stage, wireless transmission and upper computer interaction
1. And the communication module transmits data, namely a USR-WIFI232 chip in the automatic rebound part 3 is pressed to communicate with the microcontroller 10 through a serial port, and the data is converted into wireless signals, namely a pin 10 (WIFI connection state indication) and a pin 11 (module busy state indication) feed back the communication state in real time. The data is transmitted to an upper computer (such as a computer or a tablet) by wireless.
2. The upper computer software function is realized by adopting VisualTFT software, and the following functions are realized:
And displaying the pressing depth, frequency and pressure curves in real time in a chart form, so that the parameter stability can be intuitively judged.
And the data record is used for storing all data in the calibration process and supporting dimension inquiry such as time, equipment number and the like.
On-line calibration, namely sending calibration parameters to a lower computer (a microcontroller 10) through instructions, and adjusting the measurement accuracy of the device in real time.
Report generation, namely automatically generating a calibration report with a specified format, wherein the calibration report comprises measurement data, deviation analysis, calibration conclusion and the like.
5. Power supply guarantee, full-flow power supply stability
The power conversion circuit module converts a +12V power supply of the lithium battery 9 into a 5V/5A stable power supply through a CH5619 chip and supplies power to modules such as laser ranging, AD conversion and the like:
And the parallel capacitors CIN and C1 are used for filtering, and the inductor L and the diode D1 are matched for energy storage, so that voltage output stability is ensured.
And the feedback resistors R1 and R2 and the CFF capacitor regulate the output voltage, so that the influence of load fluctuation on the power supply quality is avoided.
The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the above description of the preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will fully be understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present invention.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The portable heart-lung resuscitator calibrating device comprises an outer frame (1), an inner frame (2) and a pressing automatic rebound part (3), and is characterized in that the inner frame (2) is arranged in the outer frame (1), the pressing automatic rebound part (3) is integrated in the inner frame (2), the bottom of the pressing automatic rebound part (3) is connected with one end of the outer frame (1), and the top of the pressing automatic rebound part is level with the other end of the outer frame (1);
the automatic pressing rebound part (3) comprises:
the laser ranging module (7) is arranged on the automatic pressing rebound part (3) and is used for measuring the pressing depth of the cardiopulmonary resuscitator;
the pressure detection module (15) is arranged on the automatic pressing rebound part (3), and the pressure detection module (15) is used for detecting the pressing force when the cardiopulmonary resuscitation machine is pressed;
the frequency detection module (11) is arranged on the automatic pressing rebound part (3) and is used for measuring the pressing frequency of the cardiopulmonary resuscitation machine;
The AD conversion circuit module is used for converting analog signals acquired by the laser ranging module (7), the frequency detection module (11) and the pressure detection module (15);
and the power supply conversion circuit module is used for providing stable power supply for the whole calibration device.
2. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein the compression automatic rebound portion (3) further comprises:
a bottom plate (301) installed in the outer frame (1);
the detection platform (302) is arranged right above the bottom plate (301);
The main support frame (4) is positioned between the bottom plate (301) and the detection platform (302), the main support frame (4) comprises two groups of connecting rods which are connected in a mutually crossed and rotating way, and the crossed connecting point is positioned at the center of the connecting rods in the length direction;
The four guide rails (5) are arranged, the four guide rails (5) are respectively arranged on the bottom plate (301) and the detection platform (302), and the guide rails (5) on the bottom plate (301) and the detection platform (302) are symmetrical with the center points of the bottom plate (301) and the detection platform (302);
The sliding block (6) is connected to the guide rail (5), and the sliding block (6) is rotationally connected with one end of the connecting rod;
A buffer (8) mounted on the detection platform (302) by a buffer bracket, the buffer (8) being used for avoiding vibration and noise;
One end of the hook spring (14) is connected with the detection platform (302) through a hook spring bracket, and the other end of the hook spring is connected with one end of a connecting rod on the detection platform (302).
3. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein a lithium battery (9) and a microcontroller (10) are further mounted within the compression automatic rebound portion (3).
4. The portable cardiopulmonary resuscitation machine calibration device according to claim 3, wherein a power switch (12) and a charging interface (13) are arranged on the inner frame (2), the power switch (12) is used for controlling the power on-off of the whole calibration device, and the charging interface (13) is used for being connected with an external power supply to charge the lithium battery (9).
5. The portable cardiopulmonary resuscitation machine calibration device of claim 1, wherein the AD conversion circuit module is provided with an ADR433B chip, an AD5542C chip and an OP97A chip;
The pin 2 of the ADR433B chip is connected with a VCC power supply, and is grounded through the capacitors C1 and C2 which are connected in parallel to play a role of filtering to ensure the stability of an input power supply, the pin 4 is directly grounded, and the pin 6 outputs a reference voltage VREF, which is grounded after being connected to the capacitors C3 and C4 to further stabilize the reference voltage, and is connected to the pin 6 of the AD5542C chip to provide the reference voltage for the AD 5542C;
The pin 14 of the AD5542C chip is connected with a VCC power supply, the pin 12, the pin 3 and the pin 4 are directly grounded and respectively used for connecting digital ground and analog ground to ensure that digital and analog circuits are not interfered with each other, the pin 6 is connected with a reference voltage VREF output by the ADR433B chip, the pin 9 is not connected with an empty pin, the pin 8 is connected with a clock signal CLK1-1, the pin 7 is connected with a chip selection signal CS1-1, the pin 10 is used for inputting data, the pin 11 is used for loading data control, the pin 2 outputs a converted analog signal and is connected to the pin 3 of the OP97A chip, and the pin 1 and the pin 13 are matched with the OP97A chip to form a feedback circuit;
Pin 7 of the OP97A chip is connected with a VDD power supply, pin 4 is connected with VSS, pin 3 receives an analog signal output by AD5542C, and pin 6 outputs a processed signal.
6. The portable CPR calibration device according to claim 1, wherein a CH5619 chip is arranged in the power conversion circuit module, a pin 5 of the CH5619 chip is connected with +12V power supply filtered by a parallel capacitor CIN and a C1 to provide input voltage for the chip, a pin 1 is directly grounded to ensure that a circuit has stable reference potential, a pin 3 is connected with a switching signal to control whether the chip works, the chip is turned on when the pin receives a high-level signal, a pin 4 outputs the switching signal and is connected to an inductor L, the voltage is converted and stably output to a load by the energy storage and discharging characteristics of the inductor in cooperation with a diode D1 and an output capacitor COUT, a feedback circuit is formed by resistors R1 and R2, the feedback circuit is connected to the inside of the chip to adjust the output voltage, the CFF capacitor is connected with R2 in parallel to play a role of frequency compensation, and stability and dynamic response performance of the circuit are improved.
7. The portable CPR calibration device of claim 3, wherein the microcontroller (10) further comprises a data storage module, wherein the data storage module is used for storing the CPR compression depth data acquired by the laser ranging module (7), the pressure data detected by the pressure detection module (15), the compression frequency data acquired by the compression frequency detection module (11) and the digital signal data converted by the AD conversion circuit module.
8. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein a communication module is further arranged in the automatic pressing rebound part (3), a USR-WIFI232 chip is arranged in the communication module, a pin 16 of the USR-WIFI232 chip is connected with a 3.3V power supply to supply power to the module, and meanwhile, the pin is grounded through a capacitor C4 to play a role of filtering to ensure the stability of the power supply, a pin 17 and a pin 18 are grounded and are respectively used for being connected in a digital mode and an isolated mode, a pin 2 is connected with the power supply to supply power to an internal digital circuit, a pin 4 and a pin 5 are respectively used for serial port sending and receiving pins, the pin 4 is connected with a serial port receiving end of external equipment through a resistor R31, and the pin 5 is connected with a serial port sending end of the external equipment through a resistor R34 to realize the transmission of serial port communication data;
The pin 3, the pin 6 and the pin 9 are functional pins which are respectively connected to an external control circuit or a pull-up/pull-down resistor, the pin 6 is a reset pin and is effective in low level and used for resetting the module, the pin 9 is connected to the external circuit and can realize resetting control of the WIFI function, and the pin 7 and the pin 8 are serial port hardware flow control pins;
the pin 10 is a WIFI connection state indicating pin which can be connected to an indicator lamp circuit for displaying the WIFI connection state of the module, and the pin 11 is a module busy state indicating pin which can be connected to a related circuit for judging whether the module is in a busy state.
9. The portable cardiopulmonary resuscitation machine calibration device of claim 3, wherein the microcontroller (10) is provided with an MCU chip, a 5V voltage stabilizing circuit, a 3.3V voltage stabilizing circuit, a boost circuit and a voltage dividing circuit.
10. The portable cardiopulmonary resuscitation machine calibration device according to claim 1, wherein the laser ranging module (7) is mounted between two sliders (6) on the base plate (301), and the laser ranging module (7) slides with the two sliders (6) on the base plate (301).
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