阅读说明：本技术 压力表自动检定系统及方法 (Automatic calibration system and method for pressure gauge ) 是由 柳贵东 于 2021-07-23 设计创作，主要内容包括：本发明涉及一种压力表自动检定系统及方法,该系统包括：程控造压装置,待检测压力表设置在所述程控造压装置上；压力表示值识读装置,用于自动识读所述压力表的示值；柔性轻敲机构,所述柔性轻敲机构贴装在所述压力表表盘外侧,所述柔性轻敲机构设置在所述程控造压装置上；检定控制器装置,根据保存的数据控制所述程控造压装置调节压力；压力传感器装置,所述压力传感器设置在所述程控造压装置上；误差分析处理装置；其中,所述检定控制器装置通过数据线和所述程控造压装置、所述柔性轻敲机构、所述压力传感器装置、所述压力表示值识读装置以及所述误差分析处理装置相连接。(The invention relates to an automatic calibrating system and method for a pressure gauge, wherein the system comprises: the pressure gauge to be detected is arranged on the program-controlled pressure-making device; the pressure gauge indicating value reading device is used for automatically reading the indicating value of the pressure gauge; the flexible tapping mechanism is attached to the outer side of the pressure gauge dial plate and arranged on the program control pressure generating device; the verification controller device controls the program-controlled pressure making device to adjust pressure according to the stored data; the pressure sensor device is arranged on the program control pressure making device; an error analyzing and processing device; the verification controller device is connected with the program control pressure making device, the flexible tapping mechanism, the pressure sensor device, the pressure gauge indicating value reading device and the error analysis processing device through data lines.)

1. An automatic calibration system for a pressure gauge, comprising:

the pressure gauge to be detected is arranged on the program-controlled pressure making device, and the program-controlled pressure making device is used for adjusting the pressure of the program-controlled pressure making device in the verification process flow and automatically pressurizing, maintaining pressure and relieving pressure according to different process flow requirements;

the pressure gauge indicating value reading device is used for automatically reading the indicating value of the pressure gauge;

the flexible tapping mechanism is attached to the outer side of the pressure gauge dial and used for tapping the pressure gauge dial according to a verification process flow, and the flexible tapping mechanism is arranged on the program-controlled pressure manufacturing device;

the verification controller device controls the program-controlled pressure making device to adjust pressure according to the stored data;

the pressure sensor device is used for detecting a standard pressure value generated by the program control pressure generating device, and the pressure sensor is arranged on the program control pressure generating device;

the error analysis processing device is used for carrying out error analysis on the value read by the pressure gauge indicating value reading device and the standard pressure value detected by the pressure sensor device so as to realize automatic verification of the pressure gauge;

the verification controller device is connected with the program control pressure making device, the flexible tapping mechanism, the pressure sensor device, the pressure gauge indicating value reading device and the error analysis processing device through data lines.

2. The automatic pressure gauge calibrating system according to claim 1, wherein the program-controlled pressure generating device comprises a pressurizing module, a pressure releasing module and a pressure maintaining module, the pressurizing module is connected with the pressure maintaining module, the pressure maintaining module is connected with the pressure releasing module, wherein the pressure gauge to be detected and the pressure sensor device are arranged on the pressure maintaining module; the pressure-relief module is used for relieving pressure of the automatic pressure gauge calibrating system in the calibrating process flow, and the pressure-maintaining module is used for preventing air pressure fluctuation in the calibrating process flow.

3. The automatic pressure gauge calibrating system according to claim 2, wherein the pressurizing module comprises a compressor and a quick-connect plug, and the compressor is connected with the quick-connect plug; the pressure maintaining module comprises an air storage tank and a safety valve, and the safety valve is arranged on the air storage tank; the pressure relief module comprises an electric pressure relief valve, a one-way valve and a mechanical pressure relief valve, and the electric pressure relief valve, the one-way valve and the mechanical pressure relief valve are all arranged on the air storage tank; the quick-connection plug is connected with the one-way valve.

4. The automatic pressure gauge calibrating system according to claim 3, wherein the pressure gauge indication reading device comprises a dial plate alignment module, an industrial camera and an algorithm processing module; the industrial camera is arranged on the dial plate alignment module, and the algorithm processing module is connected with the dial plate alignment module through a data line; the dial plate alignment module controls the industrial camera to align to the center of the pressure gauge in a moving mode, the industrial camera is used for reading dial plate image information of the pressure gauge, and the algorithm processing module receives the dial plate image information of the pressure gauge read by the industrial camera and carries out algorithm processing.

5. The automatic pressure gauge calibrating system according to claim 4, wherein the dial plate aligning module comprises a three-dimensional precision displacement sliding table, a pressure gauge quick connector and a blackened back plate, the pressure gauge quick connector and the blackened back plate are arranged on the program-controlled manufacturing and pressing device, the pressure gauge is connected with the pressure gauge quick connector, the industrial camera is arranged on the three-dimensional precision displacement sliding table, the three-dimensional precision displacement sliding table is adjusted to reach the state that an optical axis of the industrial camera is vertical and passes through the rotating center of the dial plate of the pressure gauge, and the blackened back plate prevents ambient stray light from entering the industrial camera.

6. The automatic pressure gauge verification system according to claim 5, wherein the algorithm processing module comprises an image segmentation algorithm unit and a readout reading algorithm unit; the industrial camera reads dial plate image information of the pressure gauge and divides the dial plate image information through the image division algorithm unit, the indicating value reading algorithm unit reads instrument information, and the read information is transmitted to the error analysis processing device.

7. The automatic pressure gauge verification system according to claim 6, wherein the flexible tapping mechanism comprises a tapping assembly and a flexible cantilever structure; wherein the rapping assembly comprises a vibration motor and a shock pad, the rapping assembly being mounted on the flexible cantilever structure; in the verification process flow, the knocking component is attached to the outer side of the dial plate of the pressure gauge and is used for knocking the dial plate of the pressure gauge.

8. The automatic pressure gauge calibrating system according to claim 7, wherein the pressure sensor device is connected to the gas tank through the quick connector, and a pressure value detected by the pressure sensor device is used as a standard pressure value and is transmitted to the error analysis processing device through a data line.

9. An automatic calibration method for pressure gauge according to any one of claims 1-8, characterized by comprising the following steps:

the pressure gauge indication reading device reads the dial indication of the pressure gauge, and the pressure sensor device detects the pressure value generated by the program control pressure generating device;

knocking the pressure gauge to be tested by the flexible tapping mechanism, and reading the dial indication value of the knocked pressure gauge by the pressure gauge indication value reading device;

the program-controlled pressure making device stably increases/decreases the pressure, and is cut off to perform pressure-resistant operation after the dial indication value of the pressure gauge to be detected reaches the upper limit of measurement, and then the program-controlled pressure making device performs reverse-order return inspection according to the stable pressure reduction/increase of the original inspection point;

the pressure gauge indicating value reading device and the pressure sensor device output data to the error analysis processing device;

and the error analysis processing device receives the value read by the pressure gauge indicating value reading device and the standard pressure value detected by the pressure sensor device to perform error analysis, so that the automatic verification of the pressure gauge to be detected is realized.

10. The method for automatically calibrating a pressure gauge according to claim 9, wherein the reading of the indication value of the pressure gauge by the pressure gauge indication value reading device comprises: the pressure meter indication reading device reads the dial image information of the pressure meter through the industrial camera, and carries out data processing on the dial image information read by the industrial camera through an image segmentation algorithm and an indication reading algorithm to obtain the pressure meter dial indication.

Technical Field

The application relates to the technical field of pressure gauge verification and metering, in particular to an automatic pressure gauge verification system and method.

Background

According to the stipulations of TI/CL109-2015 maintenance regulations for railway passenger train operation, TG/CL117-2016 three-level maintenance regulations for harmonious 5A/5G motor train unit, TG/CL120-2017 three-level maintenance regulations for harmonious 2A/2B/2C one-stage/2E/2G motor train unit, TG/CL124-2016 four-level maintenance regulations for harmonious 2A/2B/2C one-stage/2E motor train unit, the national railway administration publishes and implements a pressure gauge verification regulation for special railway vehicles for locomotives (JJJG (railway) 193-2017) in 2018 and 6 months 27, and the regulation specifies: the special railway pressure gauge for measuring the gas pressure of the braking systems such as a main air cylinder, a brake cylinder, a main air compressor, an auxiliary air compressor and the like in the running and overhauling processes of locomotives, vehicles, motor train units and the like needs to be forcibly verified, and the verification period is generally not more than 6 months.

At present, the pressure gauge special for the whole railway basically adopts a manual verification mode, and the pressure gauge special for the railway is very tedious in verification work due to various types and large quantity of pressure gauges special for railway mechanical pointers, so that a large amount of manpower and material resources are occupied. In addition, the manual verification of the meter has the following problems: the manual visual meter reading has low precision, poor reliability and poor repeatability; the labor intensity of the verification personnel is high, the verification time is long, and the working efficiency is low; the method can only carry out fixed-point verification at a limited position, and has poor flexibility and universality; manual calculations are inefficient and can only give a single point error value.

Disclosure of Invention

Therefore, the embodiment provides an automatic pressure gauge calibrating system and method, which can automatically read the indication value of the pressure gauge and automatically calculate the system error.

In order to achieve the above object, the present invention provides an automatic calibration system for a pressure gauge, comprising:

the pressure gauge to be detected is arranged on the program-controlled pressure making device, and the program-controlled pressure making device is used for adjusting the pressure of the program-controlled pressure making device in the verification process flow and automatically pressurizing, maintaining pressure and relieving pressure according to different process flow requirements;

the pressure gauge indicating value reading device is used for automatically reading the indicating value of the pressure gauge;

the flexible tapping mechanism is attached to the outer side of the pressure gauge dial and used for tapping the pressure gauge dial according to a verification process flow, and the flexible tapping mechanism is arranged on the program-controlled pressure manufacturing device;

the verification controller device controls the program-controlled pressure making device to adjust pressure according to the stored data;

the pressure sensor device is used for detecting a standard pressure value generated by the program control pressure generating device, and the pressure sensor is arranged on the program control pressure generating device;

the error analysis processing device is used for carrying out error analysis on the value read by the pressure gauge indicating value reading device and the standard pressure value detected by the pressure sensor device so as to realize automatic verification of the pressure gauge;

the verification controller device is connected with the program control pressure making device, the flexible tapping mechanism, the pressure sensor device, the pressure gauge indicating value reading device and the error analysis processing device through data lines.

In one embodiment, the program-controlled pressure generating device comprises a pressurizing module, a pressure relief module and a pressure maintaining module, wherein the pressurizing module is connected with the pressure maintaining module, the pressure maintaining module is connected with the pressure relief module, and the pressure gauge to be detected and the pressure sensor device are arranged on the pressure maintaining module; the pressure-relief module is used for relieving pressure of the automatic pressure gauge calibrating system in the calibrating process flow, and the pressure-maintaining module is used for preventing air pressure fluctuation in the calibrating process flow.

In one embodiment, the pressurizing module comprises a compressor and a quick-connection plug, wherein the compressor is connected with the quick-connection plug; the pressure maintaining module comprises an air storage tank and a safety valve, and the safety valve is arranged on the air storage tank; the pressure relief module comprises an electric pressure relief valve, a one-way valve and a mechanical pressure relief valve, and the electric pressure relief valve, the one-way valve and the mechanical pressure relief valve are all arranged on the air storage tank; the quick-connection plug is connected with the one-way valve.

In one embodiment, the pressure gauge indication reading device comprises a dial plate alignment module, an industrial camera and an algorithm processing module; the industrial camera is arranged on the dial plate alignment module, and the algorithm processing module is connected with the dial plate alignment module through a data line; the dial plate alignment module controls the industrial camera to align to the center of the pressure gauge in a moving mode, the industrial camera is used for reading dial plate image information of the pressure gauge, and the algorithm processing module receives the dial plate image information of the pressure gauge read by the industrial camera and carries out algorithm processing.

In one of them embodiment, dial plate counterpoint module includes three-dimensional accurate displacement slip table, manometer quick-operation joint and blackout backplate, manometer quick-operation joint with blackout backplate sets up programme-controlled pressure equipment is last, the manometer is connected manometer quick-operation joint, the industry camera sets up on the three-dimensional accurate displacement slip table, through adjusting three-dimensional accurate displacement slip table reaches the optical axis of industry camera is perpendicular and passes through the rotation center of manometer dial plate, blackout backplate blocks that environmental stray light gets into the industry camera.

In one embodiment, the algorithm processing module comprises an image segmentation algorithm unit and a readout reading algorithm unit; the industrial camera reads dial plate image information of the pressure gauge and divides the dial plate image information through the image division algorithm unit, the indicating value reading algorithm unit reads instrument information, and the read information is transmitted to the error analysis processing device.

In one embodiment, the flexible tapping mechanism comprises a tapping assembly and a flexible cantilever structure; wherein the rapping assembly comprises a vibration motor and a shock pad, the rapping assembly being mounted on the flexible cantilever structure; in the verification process flow, the knocking component is attached to the outer side of the dial plate of the pressure gauge and is used for knocking the dial plate of the pressure gauge.

In one embodiment, the pressure sensor device is connected to the air storage tank through the quick-connection plug, and the air pressure value detected by the pressure sensor device is used as a standard air pressure value and is transmitted to the error analysis processing device through a data line.

The embodiment also provides an automatic calibration method for the pressure gauge, which comprises the following steps:

the pressure gauge indication reading device reads the dial indication of the pressure gauge, and the pressure sensor device detects the pressure value generated by the program control pressure generating device;

knocking the pressure gauge to be tested by the flexible tapping mechanism, and reading the dial indication value of the knocked pressure gauge by the pressure gauge indication value reading device;

the program-controlled pressure making device stably increases/decreases the pressure, and is cut off to perform pressure-resistant operation after the dial indication value of the pressure gauge to be detected reaches the upper limit of measurement, and then the program-controlled pressure making device performs reverse-order return inspection according to the stable pressure reduction/increase of the original inspection point;

the pressure gauge indicating value reading device and the pressure sensor device output data to the error analysis processing device;

and the error analysis processing device receives the value read by the pressure gauge indicating value reading device and the standard pressure value detected by the pressure sensor device to perform error analysis, so that the automatic verification of the pressure gauge to be detected is realized.

In one embodiment, the reading device for reading the indication value of the pressure gauge dial comprises: the pressure meter indication reading device reads the dial image information of the pressure meter through the industrial camera, and carries out data processing on the dial image information read by the industrial camera through an image segmentation algorithm and an indication reading algorithm to obtain the pressure meter dial indication.

The invention has the beneficial effects that: the automatic pressure gauge calibrating system provided by the embodiment can realize automatic pressurization, pressure maintaining and pressure relief in a pressure gauge calibrating process flow by setting a program-controlled pressure making device, realizes automatic pressure gauge reading through a pressure gauge indicating value reading device, outputs the pressure gauge indicating value to an error analysis processing device, and can automatically calculate and analyze errors in the automatic pressure gauge calibrating system. The work efficiency of pressure gauge verification is greatly improved, and the automatic pressure gauge verification system has the advantages of simple equipment, lower cost, accurate error calculation and the like.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an automatic pressure gauge calibrating system according to this embodiment.

Fig. 2 is a schematic structural diagram of the program-controlled pressure-generating device provided in this embodiment.

Fig. 3 is a schematic structural view of a pressure gauge indicating value reading device provided in this embodiment.

Figure 4 is a schematic diagram of the structure of the flexible tapping mechanism provided in this embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

At present, the pressure gauge special for the whole railway basically adopts a manual verification mode, and the pressure gauge special for the railway is very tedious in verification work due to various types and large quantity of pressure gauges special for railway mechanical pointers, so that a large amount of manpower and material resources are occupied. In addition, the manual verification of the meter has the following problems: the manual visual meter reading has low precision, poor reliability and poor repeatability; the labor intensity of the verification personnel is high, the verification time is long, and the working efficiency is low; the method can only carry out fixed-point verification at a limited position, and has poor flexibility and universality; manual calculations are inefficient and can only give a single point error value.

The invention provides an automatic pressure gauge calibrating system based on image segmentation, aiming at the problem of calibrating a pressure gauge special for a manual railway. The automatic pressure gauge calibrating system can realize automatic pressurization, pressure maintaining and pressure relief on one hand; on the other hand, the indication value of the pressure gauge can be automatically read by utilizing an image segmentation technology; in addition, the system error can be automatically calculated according to the verification regulation of special railway pressure gauges for rolling stock (JJG (railway) 193-2017).

Referring to fig. 1-4, the present invention provides an automatic calibration system for pressure gauges, which comprises a program-controlled pressure-making device 10, a pressure gauge indication reading device 20, a flexible tapping mechanism 30, a calibration controller device 40, a pressure sensor device 50 and an error analysis processing device 60, wherein the calibration controller device 40 is connected with the program-controlled pressure-making device 10, the flexible tapping mechanism 30, the pressure sensor device 50, the pressure gauge indication reading device 20 and the error analysis processing device 60 through data lines.

The pressure gauge to be detected is arranged on the program-controlled pressure making device 10, and the program-controlled pressure making device 10 is used for adjusting the pressure of the pressure gauge in the verification process flow and automatically pressurizing, maintaining pressure and releasing pressure according to different verification process flow requirements; the pressure gauge indicating value reading device 20 is used for automatically reading the indicating value of the pressure gauge; the flexible tapping mechanism 30 is attached to the outer side of the pressure gauge dial, the pressure gauge dial is tapped according to the verification process flow, and the flexible tapping mechanism 30 is arranged on the program control pressure making device 10; the verification controller device 40 controls the program-controlled pressure making device 10 to adjust the pressure according to the stored data; the pressure sensor device 50 is used for detecting a standard pressure value generated by the program-controlled pressure generating device 10, and the pressure sensor is arranged on the program-controlled pressure generating device 10; the error analysis processing device 60 is used for carrying out error analysis on the value read by the pressure gauge indicating value reading device 20 and the standard pressure value detected by the pressure sensor device 50, so as to realize automatic verification of the pressure gauge.

The automatic pressure gauge calibrating system provided by the embodiment can realize automatic pressurization, pressure maintaining and pressure relief in a pressure gauge calibrating process flow by arranging the program-controlled pressure making device 10, realizes automatic pressure gauge reading through the pressure gauge indicating value reading device 20, outputs the pressure gauge indicating value to the error analysis processing device 60, and can automatically calculate and analyze errors in the automatic pressure gauge calibrating system. The work efficiency of pressure gauge verification is greatly improved, and the automatic pressure gauge verification system has the advantages of simple equipment, lower cost, accurate error calculation and the like.

In the present embodiment, the verification process flow is the basis for the verification controller 40 to control the pressure regulation of the pressure programmed pressure generating device 10, and the pressure is regulated by the pressure programmed pressure generating device 10, so as to control the whole verification process flow. And the verification process flow is manufactured according to the verification regulation of special railway pressure gauges for rolling stock (JJG (railway) 193-2017).

In one embodiment, the programmable pressure generating device 10 comprises a pressurizing module, a pressure releasing module and a pressure maintaining module, wherein the pressurizing module is connected with the pressure maintaining module, the pressure maintaining module is connected with the pressure releasing module, and the pressure gauge to be detected and the pressure sensor device 50 are arranged on the pressure maintaining module; the pressure module pressurizes the automatic pressure gauge calibrating system in the calibrating process flow, the pressure relief module relieves pressure of the automatic pressure gauge calibrating system in the calibrating process flow, and the pressure maintaining module prevents air pressure fluctuation in the calibrating process flow.

The pressure gauge to be detected includes, but is not limited to, a pressure gauge 70 dedicated to the railway, and in this embodiment, the pressure gauge to be detected is illustrated by taking the pressure gauge 70 dedicated to the railway as an example. If other pressure gauges need to be calibrated, the pressure gauge to be tested can be replaced according to the calibration process flow.

In one embodiment, the pressurizing module comprises a compressor and a quick-connect plug, wherein the compressor is connected with the quick-connect plug; the pressure maintaining module comprises a gas storage tank and a safety valve, and the safety valve is arranged on the gas storage tank; the pressure relief module comprises an electric pressure relief valve, a one-way valve and a mechanical pressure relief valve, and the electric pressure relief valve, the one-way valve and the mechanical pressure relief valve are all arranged on the air storage tank; the quick-connecting plug is connected with the one-way valve.

As shown in fig. 2, specifically, the program-controlled pressure generating device 10 mainly comprises a compressor, an air storage tank and a pressure relief valve, wherein the compressor includes, but is not limited to, a reciprocating piston compressor 101, and the present embodiment is described by taking the reciprocating piston compressor 101 as an example; the relief valve includes, but is not limited to, an electric relief valve 103 and a mechanical relief valve, and the electric relief valve 103 is exemplified in the present embodiment. The piston type compressor 101 serves as a pressurizing module to pressurize the program control pressure generating device 10, the electric pressure relief valve 103 serves as a pressure relief module to relieve pressure of the program control pressure generating device 10, and the gas storage tank 102 serves as a pressure maintaining module to maintain pressure stability of the program control pressure generating device 10 and prevent pressure fluctuation.

As shown in fig. 2, the reciprocating piston compressor 101 is connected to the gas tank 102 through a quick connector 104 and a check valve 105, the quick connector 104 can be used for quickly disassembling and assembling the reciprocating piston compressor 101 during the equipment maintenance process or in the middle, and the check valve 105 can prevent high-pressure gas in the gas tank 102 from reversely flowing into the reciprocating piston compressor 101, so that the starting of the reciprocating piston compressor 101 is difficult. The electric pressure relief valve 103 is arranged on the other side of the air storage tank 102, and the electric pressure relief valve 103 can timely relieve pressure of the air storage tank 102 according to the verification process flow. The bottom of the gas storage tank 102 is provided with a mechanical pressure relief valve 106, and the top is provided with a safety valve 107. The mechanical pressure relief valve 106 is used for relieving compressed air in the air storage tank 102 when the automatic pressure gauge calibration system is abnormal or when the automatic pressure gauge calibration system is overhauled, and can also be used for discharging condensed water in the air storage tank 102. The safety valve 107 can automatically release pressure after the pressure of the automatic verification system of the pressure gauge exceeds a limit value, so that the safety of the automatic verification system of the pressure gauge is ensured.

In one embodiment, the pressure indication reading device 20 includes a dial alignment module, an industrial camera 204 and an algorithm processing module; the industrial camera 204 is arranged on the dial plate alignment module, and the algorithm processing module is connected with the dial plate alignment module through a data line; the dial plate alignment module controls the industrial camera 204 to align to the center of the railway special pressure gauge 70, the industrial camera 204 is used for reading dial plate image information of the railway special pressure gauge 70, and the algorithm processing module receives the dial plate image information of the railway special pressure gauge 70 read by the industrial camera 204 and performs algorithm processing.

In one embodiment, the dial plate alignment module comprises a three-dimensional precision displacement sliding table 201, a pressure gauge quick joint 202 and a blackened back plate 203, the pressure gauge quick joint 202 and the blackened back plate 203 are arranged on the program control pressure generating device 10, the railway special pressure gauge 70 is connected with the pressure gauge quick joint 202, the industrial camera 204 is arranged on the three-dimensional precision displacement sliding table 201, the three-dimensional precision displacement sliding table 201 is adjusted to enable the optical axis of the industrial camera 204 to be vertical and to pass through the rotation center of the dial plate of the railway special pressure gauge 70, and the blackened back plate 203 blocks ambient stray light from entering the industrial camera 204.

In one embodiment, the algorithm processing module includes an image segmentation algorithm unit 205 and a readout reading algorithm unit 206; the industrial camera 204 reads the dial image information of the pressure gauge and divides the dial image information through the image division algorithm unit 205, the indicating value reading algorithm unit 206 reads the meter information, and the read information is transmitted to the error analysis processing device 60.

Specifically, the pressure indication reading device 20 includes a dial alignment module, an industrial camera 204 and an algorithm processing module. Wherein, dial plate counterpoint module includes three-dimensional accurate displacement slip table 201, manometer quick-operation joint 202 and blackout backplate 203 for the industry camera 204 that reads the manometer dial plate image sets up on three-dimensional accurate displacement slip table 201, and through adjusting three-dimensional accurate displacement slip table 201 and reach the optical axis of industry camera 204 perpendicular and through the rotation center of manometer dial plate, blackout backplate 203 blocks the environment stray light and gets into industry camera 204.

As shown in fig. 3, the pressure gauge 70 dedicated to the railway is mounted on the program-controlled pressure-producing device 10 through a pressure gauge quick connector 202, and the industrial camera 204 is disposed on the three-dimensional precision displacement slide 201. The blackened back plate 203 is arranged on the program-controlled voltage generating device 10, and the blackened back plate 203 blocks ambient stray light from entering the industrial camera 204. The algorithm processing module comprises an image segmentation algorithm unit 205 and a readout reading algorithm unit 206. The industrial camera 204 reads dial image information of the pressure gauge and transmits the dial image information to the image segmentation algorithm unit 205, the image segmentation algorithm unit 205 performs segmentation, the image segmentation algorithm unit 205 transmits the segmented image information to the indication reading algorithm unit 206, and the indication reading algorithm unit 206 finishes reading the gauge information. The indication reading algorithm unit 206 transmits the read information to the error analysis processing device 60. The error analysis processing device 60 can automatically analyze the verification error according to the verification regulation of the pressure gauge special for the railway special for the locomotive vehicle (JJG 193-.

As shown in figure 4, in one embodiment the flexible tapping mechanism 30 comprises a tapping assembly and a flexible cantilever structure 303; wherein, the knocking component comprises a vibration motor 301 and a shock pad 302, and is arranged on the flexible cantilever structure 303; in the verification process flow, the knocking component is attached to the outer side of the dial plate of the railway special pressure gauge 70 to knock the dial plate of the railway special pressure gauge 70.

In one embodiment, the pressure sensor device 50 is connected to the air tank 102 by a quick-connect plug, and the air pressure value detected by the pressure sensor device 50 is transmitted to the error analysis processing device 60 as a standard air pressure value through a data line.

In one embodiment, the railroad specific pressure gauge and pressure sensor device 50 is connected to the air reservoir 102 via a quick connect plug, and the pressure sensor device 50 provides a precise air pressure value as a test standard. The air pressure value detected by the pressure sensor device 50 is transmitted to the error analysis processing device 60 as a standard air pressure value through a data line. The railway special pressure gauge 70 is used as a checked device, and the dial indication value of the railway special pressure gauge 70 is obtained by reading dial image information of the railway special pressure gauge 70 under the control of a checking controller by an industrial camera 204 arranged on a three-dimensional precision displacement sliding table 201, and performing twice segmentation by an image segmentation algorithm in an image segmentation algorithm unit 205, segmenting scale marks from the instrument dial for the first time, and extracting data blocks of the scale marks and the background of the scale marks; and extracting the scale mark and the pointer information from the data block by using the adaptive algorithm for the second time, further realizing the reading of the instrument information, and uploading the information to the error analysis processing device 60.

The embodiment also provides an automatic calibration method for the pressure gauge, which comprises the following steps: the indication value reading device 20 of the pressure gauge reads the indication value of the dial plate of the pressure gauge, and the pressure sensor device 50 detects the pressure value generated by the program control pressure generating device 10; the flexible tapping mechanism 30 taps the pressure gauge to be measured, and the pressure gauge indication value reading device 20 reads the dial indication value of the tapped pressure gauge to be measured; the program-controlled pressure making device 10 stably increases/decreases the pressure, when the dial indication value of the pressure gauge to be detected reaches the upper limit of measurement, the program-controlled pressure making device 10 is cut off for pressure-resistant operation, and then the program-controlled pressure making device 10 performs reverse-order return inspection according to the stable pressure reduction/increase of the original verification point; the pressure gauge indicating value reading device 20 and the pressure sensor device 50 output data to the error analysis processing device 60; the error analysis processing device 60 receives the value read by the pressure gauge indicating value reading device 20 and the standard pressure value detected by the pressure sensor device 50 to perform error analysis, so as to realize automatic verification of the pressure gauge to be detected.

The automatic pressure gauge verification method is mainly applied to the automatic pressure gauge verification system provided in the embodiment, and the verification process flow of the automatic pressure gauge verification method is specified according to the special railway pressure gauge verification regulations for rolling stock (JJG 193-2017).

Specifically, the indication value of the pressure gauge special for the railway is calibrated according to a dividing line marked with numbers, before the knocking component knocks the pressure gauge special for the railway, the indication value reading device 20 of the pressure gauge reads the dial indication value of the pressure gauge, and the pressure sensor device 50 detects the pressure value generated by the program control pressure building device 10. Then each check point needs to be knocked by the tapping device for 2 seconds after being in place, indication values of a pressure gauge dial special for the railway are read once before and after knocking, the pressure is gradually and stably increased (or decreased) during checking, when the indication values reach the upper limit of measurement, the pressure source is cut off, the pressure is resisted for 3 minutes, and then the check is carried out in a reverse sequence according to the stable voltage reduction (voltage increase) of the original check point. The whole verification process is controlled by a verification controller.

In one embodiment, the pressure gauge indication reading device 20 reads a pressure gauge dial indication, comprising: the pressure gauge indication reading device 20 reads the image information of the pressure gauge dial through the industrial camera 204, and performs data processing on the image information of the pressure gauge dial read by the industrial camera 204 through an image segmentation algorithm and an indication reading algorithm to obtain the pressure gauge dial indication.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.