CN110243451A - A dual-mode truck scale verification method and device thereof - Google Patents

Abstract

The present invention relates to a kind of double mode truck scale calibration method and its devices, mobile mechanism and at least four reinforcing components are provided with below the bottom beam of the device, its extension bar top is provided with high-precision pressure sensor and scroll wheel, under the collaborative work of payload module, mobile mechanism and measurement and control unit, the every static and dynamic verification task of truck scale can be accurately finished.It is poor mainly for the working strength height of existing truck scale weight detecting method, low efficiency, carrying counterweight safety, and the element task amount of non-weight detecting method is big, and is merely able to the problems such as completing static verification work and proposes.Since the apparatus structure is ingenious in design, without adding other basic frameworks, static and dynamic dual-mode calibration operation can be completed, manipulation process is succinct, and device carries convenient, working efficiency and high reliablity.

Description

A dual-mode truck scale verification method and device thereof

technical field

The invention relates to the technical field of measurement verification, in particular to a dual-mode truck scale verification method and device thereof.

Background technique

With the rapid development of my country's economy, large-tonnage trucks have become an important role in transportation. At the same time, the society has more and more demands for large-range electronic truck scales ranging from 30 tons to 200 tons, which currently account for more than 70% of the total use. This has created more requirements for the measurement verification method of electronic truck scales with a larger range of 30 tons or more. If the verification method of standard weights continues to be used, there will be many problems, such as high intensity of verification work, low efficiency, and heavy handling of weights. The safety is poor, and it can no longer meet the needs of today's social development.

In order to adapt to the changes brought about by economic development, with the development of new weighing instruments, related technical inventions continue to emerge. Patent CN85204785U discloses a kind of automatic weight checking vehicle. Although the degree of automation is high, weights are needed to participate in the verification, and a special mechanism is needed to lift the weights. Although patents such as patent CN86105843A and patent ZL0223087.7 have adopted non-weight verification methods, they all need to install additional pressurized supports or frames on the weighing apparatus. Patent verification technologies such as application numbers 201010223475.9 and 201010236868.3 are advanced, but they all require the pre-installation of several tension frames or foundation foundations, the amount of work is large, and the dynamic verification work cannot be completed. Application No. 201210057923.1 discloses a hydraulic dynamic calibration device for verifying track scales. Although it can realize the dynamic verification function, it is necessary to build complex-shaped reaction force foundation structures on both sides of the track scale in advance, and the amount of work is very large.

Contents of the invention

The object of the present invention is to provide a dual-mode truck scale verification method and its device for the above problems. It uses the moving mechanism and force parts under the bottom beam, as well as the high-precision pressure sensor and rolling wheel on the top of the force bar, and under the cooperation of the load module and the measurement and control unit, it can accurately complete the static load of the truck scale. and dynamic testing tasks. This method can replace the standard weight verification method, and does not need to install any additional verification brackets, frames or foundations on the original truck scale and its surroundings.

The purpose of the present invention is achieved by the following technical means:

A dual-mode truck scale verification method and its device, the device includes a bottom beam and four supporting parts arranged at its two ends, a support rod that can be lifted and lowered is arranged in the supporting part, and a load module and a load module are arranged on the bottom beam The measurement and control unit is provided with four moving wheels and a moving mechanism under the bottom beam, and several force-adding units are arranged under the moving mechanism. A pressure sensor is arranged on the top of the force bar, wherein the pressure sensor is characterized in that: a scroll wheel is arranged under the pressure sensor, and the distance between the scroll wheels in the left and right directions is approximately equal to 1/2 of the length of the ground balance platform, and the scroll wheel After the wheel is in contact with the ground scale platform, when the moving mechanism moves left and right, the scroll wheel can realize the left and right rolling function. The above-mentioned moving mechanism is composed of a motor installed on the bottom beam, a screw, a guide rail and a moving support plate installed on the guide rail. It is characterized in that the length of the guide rail is greater than the length of the ground balance platform, and the moving support At least four force-adding units are symmetrically installed on the board.

The device can be conveniently dragged by the tractor to the right above the platform of the truck scale to be inspected through the moving wheels under the bottom beam. device and lift the mobile wheels off the ground. Since the top of the bottom beam is also equipped with a load module with a weight greater than the maximum weighing capacity of the truck scale as a counter force support, we can sequentially or synchronously start the four booster components under the bottom beam according to the verification regulations, and control their booster through the measurement and control unit The rod drives the rolling wheel to push down the truck scale platform. Since the top of the booster rod is equipped with a high-precision pressure sensor, the pressure signal detected by it can be fed back to the measurement and control unit in time, so that the static pressure of each weighing point of the truck scale can be accurately obtained. test data.

In order to obtain the dynamic verification data of the truck scale, we can control the motor and screw rod in the moving mechanism to drive the moving support plate left and right within a certain range of travel while the above-mentioned rolling wheel is pushing down the truck scale platform, and then installed on the moving The booster unit on the support plate drives the rolling wheel with a certain load force to walk smoothly on the ground scale platform. At this time, by collecting the signal fed back by the high-precision pressure sensor set on the top of the booster rod, the vehicle can be obtained. Balance the dynamic verification data of each weighing point.

The characteristics that the present invention compares with prior art:

The bottom beam of the device is provided with a moving mechanism and at least four force-increasing parts, and a high-precision pressure sensor and a rolling wheel are arranged at the top of the force-increasing rod. With the cooperation of the load module and the measurement and control unit, it can accurately complete Various static and dynamic verification tasks of truck scales. The structure design of the device is ingenious, and it does not need to attach other basic frames to the truck scale and its surroundings, and can realize the weighing verification function of static and dynamic dual modes.

Description of drawings

The accompanying drawings illustrate a more practical embodiment of the present invention in practice.

Attached drawing 1 is a schematic diagram of the device structure, in the figure: G: ground; M: moving wheel; Q: load module; T: ground balance; D: moving mechanism; P: pressure sensor; R: rolling wheel; 1: support rod; 2: supporting part; 3: bottom beam; 4: measurement and control unit; 5: booster part; 6: booster rod.

Accompanying drawing 2 is a bottom view of the moving mechanism D in accompanying drawing 1, in the figure: d1: motor; d2: screw rod; d3: guide rail; d4: moving support plate; d5: force unit.

Detailed ways

The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

Embodiments Taking a commonly used 50-ton truck scale as an example, the external dimensions (length×width) of the T platform of the ground scale are: 5m×3m, and the number of supporting points of the carrier is four. In this embodiment, the external dimensions (length×width×height) of the bottom beam 3 are set to 6m×2.5m×1.5m, and four 56a I-beams are selected to be manufactured by parallel welding. The load module Q above the bottom beam 3 can be completed by combining ten gray cast irons whose external dimensions (length×width×height) are about 1m×1m×0.8m. The two ends of the bottom beam 3 are welded and assembled with four hydraulic cylinders with a cylinder diameter of 200mm as the supporting part 2, and the moving mechanism D is installed under the bottom beam 3, and its external dimensions (length×width×height) are set to 5.5m×2.5m×0.4m , four force-applying parts 5 are welded at the four-corner symmetrical positions of the moving support plate d4 of the moving mechanism D, the vertical distance between the force-bearing parts 5 is set to about 2m, and the horizontal distance between the left and right is set to 2.5m (two times the length of the ground balance T platform). Considering that the four-point eccentric load verification range in the truck scale verification regulations only needs to reach 1/3 of the sum of the maximum weighing capacity and the maximum added tare value, a hydraulic cylinder with a bore diameter of 200mm can be selected as the force component 5 . The working pressure of the hydraulic cylinder is set to about 10MPa. The precision of the pressure sensor P is an order of magnitude higher than that of the truck scale, so as to ensure that the maximum allowable error of the measuring instrument in the measurement and control unit 4 does not exceed 1/3 of the maximum allowable error of the truck scale under the specified corresponding load. The measurement and control unit 4 is also provided with a hydraulic servo control module and a control panel to realize precise force control of the force force component 5 .

Main workflow of the present invention:

Firstly, the device is dragged to the top of the truck scale platform by a tractor, and the measurement and control unit 4 is operated to make the supporting part 2 prop up the whole device. Under the protection of the load module Q reaction force support on the bottom beam 3 whose weight is greater than the maximum weighing capacity of the truck scale, according to the load value requirements of each weighing point in the verification regulations, the load addition value of the measurement and control unit 4 is set in sequence. Then, operate the measurement and control unit 4 to independently activate the four force-applying parts 5 below the bottom beam 3 to push down the ground scale T platform, and complete the bias loading verification of the truck scale with the cooperation of the high-precision pressure sensor K. Afterwards, the four force-applying components 5 are started synchronously to complete the full-range loading verification work of the truck scale.

The dynamic weighing and loading verification work of the truck scale is as follows: the setting of the load force value of the measurement and control unit 4 is the same as above, and the force component 5 that generates the corresponding load force is controlled by the measurement and control unit 4 to drive the rolling wheel R downward through the force bar 6 Push the ground balance T platform. Afterwards, the motor d1 and screw d2 in the moving mechanism D are controlled to drive the moving support plate d4 left and right within a certain stroke range, and then the rolling wheel R with a certain load force is driven by the force unit d5 installed on the moving support plate d4 Walking steadily on the ground scale T platform, at this time, by collecting the signal fed back by the high-precision pressure sensor P set on the top of the booster rod 6, the dynamic verification data of each weighing point of the truck scale can be obtained.

Through the above discussion and examples, the present invention is provided with at least four force-exerting parts 5 on the moving mechanism D below the bottom beam 3 of the device, and a high-precision pressure sensor P and a rolling wheel are arranged at the top of its force-exerting rod 6 R, under the cooperative cooperation of the load module Q and the measurement and control unit 4, various static and dynamic verification tasks of the truck scale can be accurately completed. The structure design of the device is ingenious, no need to build and install other basic frames, the work process is simple, the device is convenient to carry, and the work efficiency and reliability are high.

Claims (2)

1. A dual-mode truck scale verification method and device thereof, the device comprises a bottom beam (3) and four supporting parts (2) arranged at its two ends, and a supporting rod that can be lifted up and down is arranged in the supporting part (2) (1), a load module (Q) and a measurement and control unit (4) are arranged above the bottom beam (3), and four moving wheels (M) and a moving mechanism (D) are arranged under the bottom beam (3), Below the moving mechanism (D) are provided with several booster units (d5), and in the booster part (5) of the booster unit (d5), a booster rod (6) that can be lifted is arranged, and the booster rod ( 6) A pressure sensor (P) is provided at the top, wherein the pressure sensor (P) is characterized in that: a scroll wheel (R) is also provided under the pressure sensor (P), and the left and right directions between the scroll wheels (R) The distance between them is about half of the length of the ground scale (T) platform. After the rolling wheel (R) contacts the ground scale (T) platform, when the moving mechanism (D) moves left and right, the rolling wheel (R) can realize Left and right scrolling functionality. 2. A dual-mode truck scale verification method and its device according to claim 1, wherein the moving mechanism (D) includes a motor (d1), a screw (d2), a guide rail ( d3) and the mobile support plate (d4) installed on the guide rail (d3), it is characterized in that: the length of the guide rail (d3) is greater than the length of the ground balance (T) platform, and the mobile support plate (d4) At least four force-applying units (d5) are arranged symmetrically on the top.