CN203224570U - Digital insulation-resistance on-line detector - Google Patents
Digital insulation-resistance on-line detector Download PDFInfo
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- CN203224570U CN203224570U CN 201320240605 CN201320240605U CN203224570U CN 203224570 U CN203224570 U CN 203224570U CN 201320240605 CN201320240605 CN 201320240605 CN 201320240605 U CN201320240605 U CN 201320240605U CN 203224570 U CN203224570 U CN 203224570U
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- insulation resistance
- resistance
- insulation
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- 238000009413 insulation Methods 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract 1
- 238000012800 visualization Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The utility model discloses a digital insulation-resistance on-line detector and relates to the technical field of on-line monitoring of insulation resistance in power systems. The detector includes a detecting module used for detecting values of on-line insulation resistances in real time, wherein the detecting module is composed of a signal generation circuit, a testing circuit, a signal conversion circuit and a sample hold circuit, and the above four circuits are sequentially connected together; a signal alarm circuit connected with the sample hold circuit; an A/D conversion circuit connected with the signal alarm circuit; a microprocessor connected with the A/D conversion circuit; and a display connected with the microprocessor. A power source supplies power to the above parts via a power switching circuit. The detector has the advantages of high integrated level, small size, easy operation, and no influence on normal use of power systems because on-line insulation resistances can be detected directly in a live circuit without power interruption; and actual values of insulation resistances in monitoring positions can be detected in real time and displayed on a liquid crystal display screen, and high levels of real-time feedback performance and visualization are achieved.
Description
Technical field
The utility model relates to using electricity system insulation resistance on-line monitoring technique field, specifically is a kind of digital insulation resistance on-line detector, is applicable to the online detection of various types of using electricity system insulation resistances.
Background technology
At present, along with the development of power electronic devices, be accompanied by a large amount of power electronic equipment ranges of application more and more widely, the important parameter of weighing power electronic equipment insulating property quality is the size of its insulating resistance value.The quality of the insulativity of a large amount of power electronic equipments of online detection can not adopt common measurement instruments, as digital multimeter, megohmmeter, insulation multimeter, Hi-pot Tester etc.Reason is to adopt means commonly used to have very big drawback when measuring: a part of equipment uses special-purpose surveying instrument to survey; Some instrumentations are very inconvenient during measurement, and measuring accuracy is very low, mainly are used in the non-on-line measurement.Megohmmeter commonly used is exactly a kind of insulation measurement instrument commonly used, and it is the high resistance megohmmeter of weighing the insulation degradation situation by measuring resistance under condition of high voltage.The susceptibility that power electronic devices is withstand voltage is very strong, is easy to cause device to damage because of high pressure under high-pressure situations.
Summary of the invention
In order to solve the shortcoming of above-mentioned prior art, the utility model provides a kind of new digital formula insulation resistance on-line detector; Need not cut off the power supply and direct chargedly to carry out online insulation measurement, not influence the normal use of using electricity system; The actual resistance of insulation resistance of monitoring device is detected in real time and show real-time and visual degree height in LCDs; Can effectively find the potential safety hazard of using electricity system, in time remind the electricity consumption personnel in time to investigate the elimination fault, reach the reliable purpose of Electrical Safety.
The utility model is realized with following scheme: a kind of new digital formula insulation resistance on-line detector comprises the mensuration module that is used for detecting in real time online insulation resistance resistance that is made of the signal generating circuit, test circuit, signaling conversion circuit and the sampling hold circuit that connect successively; The signal alarm circuit that is connected with sampling hold circuit, the A/D change-over circuit that is connected with the signal alarm circuit, with A/D change-over circuit microprocessor linked, the display that is connected with microprocessor, power supply is powered to each part mentioned above by power-switching circuit.
Principle of work: metering circuit is to adopt the continuous current power supply the principle, converts tested insulation resistance to corresponding current value, passes through the magnitude of voltage that conversion becomes to equate with tested insulating resistance value with current conversion again, thereby obtains the insulation resistance parameter of required measurement.Signal generating circuit produces pulse signal and carries out circuit control, carries out quick sampling and maintenance according to the magnitude of voltage of actual measurand.Measure the insulation resistance parameter of gained through the A/D conversion, data are sent to the microprocessor single-chip microcomputer and are handled, compare with default insulation resistance value, then do not control warning circuit and report to the police if meet safe range, the insulation resistance value that will monitor in real time of microprocessor control LCDs shows at display screen simultaneously.
The beneficial effects of the utility model are: the integrated level height, and volume is little, and is simple to operate, need not cut off the power supply for direct chargedly carrying out online insulation measurement, do not influence the normal use of using electricity system; The actual resistance of monitoring position insulation resistance is detected in real time and show real-time and visual degree height in LCDs; Can effectively find the potential safety hazard of using electricity system, in time remind the electricity consumption personnel in time to investigate the elimination fault, reach the reliable purpose of Electrical Safety.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model circuit diagram.
Embodiment
As shown in Figure 1, new digital formula insulation resistance on-line detector is made up of six parts: power-switching circuit is used to other modules to carry out the supply voltage conversion; The determination of insulation resistance module comprises signal generating circuit, test circuit, signal conversion circuit and the sampling hold circuit that connects successively, for detection of the insulation resistance resistance.The signal alarm circuit module is used for carrying out alarm when insulation resistance value does not meet safe range.The A/D modular converter is used for the conversion between simulating signal and the digital signal; Microprocessor carries out the processing of data and the control of signal.Display, be used for to show detect in real time the resistance of insulation resistance.
As shown in Figure 2, adopting timing IC chip model in the mensuration module of insulation resistance resistance is that to adopt operational amplifier be single amplifier high gain operational amplifier uA741 and the four-operational amplifier LM324 that has very differential input for NE555, signal generating circuit.Microprocessor adopts single chip computer AT MEGA16.Display adopts the LED1602 LCDs.33,34,35 pin of single chip computer AT MEGA16 are connected with display module LCD1602 LCDs E, R/W, RS pin respectively; The PC7 of single chip computer AT MEGA16～PC0 pin is connected with the DB0～DB7 pin of display module LCD1602 LCDs respectively; The PA1 pin of single chip computer AT MEGA16 is connected with hummer;
The course of work: this device is selected suitable switch gear and connected power supply, and with the two ends nib contact measured power electronic devices of measuring, insulation resistance detects at line detection circuit.Processor is handled data and deliver on the LCDs and shows; Compare with the preset resistance safe range simultaneously, if do not meet, then control hummer and carry out the buzzing warning.
Claims (4)
1. a digital insulation resistance on-line detector is characterized in that: comprise the mensuration module that is used for detecting in real time online insulation resistance resistance that is made of the signal generating circuit, test circuit, signaling conversion circuit and the sampling hold circuit that connect successively; The signal alarm circuit that is connected with sampling hold circuit, the A/D change-over circuit that is connected with the signal alarm circuit, with A/D change-over circuit microprocessor linked, the display that is connected with microprocessor, power supply is powered to each part mentioned above by power-switching circuit.
2. digital insulation resistance on-line detector according to claim 1 is characterized in that: it is single amplifier high gain operational amplifier uA741 and the four-operational amplifier LM324 that has very differential input that signal generating circuit adopts operational amplifier.
3. digital insulation resistance on-line detector according to claim 1 is characterized in that: described microprocessor employing single chip computer AT MEGA16.
4. digital insulation resistance on-line detector according to claim 1 is characterized in that: described display employing LED1602 LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240605 CN203224570U (en) | 2013-05-03 | 2013-05-03 | Digital insulation-resistance on-line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240605 CN203224570U (en) | 2013-05-03 | 2013-05-03 | Digital insulation-resistance on-line detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224570U true CN203224570U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320240605 Expired - Fee Related CN203224570U (en) | 2013-05-03 | 2013-05-03 | Digital insulation-resistance on-line detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN203224570U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092978A (en) * | 2015-09-17 | 2015-11-25 | 南京民盛电子仪器有限公司 | Online monitoring and offline detection dual-purpose insulation resistance tester |
| CN105259416A (en) * | 2015-11-06 | 2016-01-20 | 天津天传新能源电气有限公司 | An insulation resistance detector applied to an IT system and a detection method thereof |
| CN106872786A (en) * | 2017-01-25 | 2017-06-20 | 浙江大学 | A kind of resistance electronic gauge |
| CN110174554A (en) * | 2019-03-25 | 2019-08-27 | 上海微程电气设备有限公司 | Digital high resistance measurement device |
| CN112725858A (en) * | 2020-12-02 | 2021-04-30 | 西比里电机技术(苏州)有限公司 | A kind of thermoelectrochemical oxidation system state detection method |
-
2013
- 2013-05-03 CN CN 201320240605 patent/CN203224570U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092978A (en) * | 2015-09-17 | 2015-11-25 | 南京民盛电子仪器有限公司 | Online monitoring and offline detection dual-purpose insulation resistance tester |
| CN105259416A (en) * | 2015-11-06 | 2016-01-20 | 天津天传新能源电气有限公司 | An insulation resistance detector applied to an IT system and a detection method thereof |
| CN105259416B (en) * | 2015-11-06 | 2018-01-19 | 天津天传新能源电气有限公司 | A kind of insulation resistance detector and its detection method applied to IT system |
| CN106872786A (en) * | 2017-01-25 | 2017-06-20 | 浙江大学 | A kind of resistance electronic gauge |
| CN110174554A (en) * | 2019-03-25 | 2019-08-27 | 上海微程电气设备有限公司 | Digital high resistance measurement device |
| CN112725858A (en) * | 2020-12-02 | 2021-04-30 | 西比里电机技术(苏州)有限公司 | A kind of thermoelectrochemical oxidation system state detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20140503 |