CN213120965U

CN213120965U - Digital pressure gauge automatic calibration device based on image processing technology

Info

Publication number: CN213120965U
Application number: CN202022075246.9U
Authority: CN
Inventors: 秦亭亭; 张忠立; 洪扁; 王灿
Original assignee: Shanghai Institute of Measurement and Testing Technology
Current assignee: Shanghai Institute of Measurement and Testing Technology
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-05-04
Anticipated expiration: 2030-09-21

Abstract

The utility model belongs to the technical field of instrument verification, and discloses an automatic digital pressure gauge calibration device based on image processing technology, which comprises a working platform, a moving mechanism and a calibration frame are arranged on the working platform, a plurality of cameras are arranged on the moving mechanism and used for controlling the movement of the cameras in the X-axis, Y-axis and Z-axis directions, a plurality of digital pressure gauges to be calibrated are arranged on the calibration frame and are arranged in a one-to-one correspondence manner and used for completing the acquisition of reading images of the digital pressure gauges to be calibrated, each digital pressure gauge to be calibrated is communicated with a pressure controller, the pressure controller is communicated with a mechanical pump and a nitrogen storage tank and is connected with a processor and used for controlling the nitrogen storage tank to generate standard pressure meeting the requirement of the calibration of the digital pressure gauges to be calibrated, the processor is also connected with a plurality of cameras and a touch screen and is used for receiving the standard pressure of the pressure controller and the reading images acquired by each, and automatically calibrating the digital pressure gauges to be calibrated, and displaying the calibration results on the touch screen.

Description

Digital pressure gauge automatic calibration device based on image processing technology

Technical Field

The utility model relates to a technical field of instrument examination especially relates to a digital pressure gauge automatic calibration device based on image processing technique.

Background

Pressure, also known as pressure, is one of the most widely used measurement parameters in industrial and agricultural processes and in scientific research. In order to ensure the smooth operation of production activities and to ensure the safe and reliable operation of various process flows, the pressure must be measured and controlled by using various pressure meters. The basic task of pressure measurement is to ensure the reliable performance of the instrument for measuring pressure, research a new pressure measurement method and promote the continuous development of the pressure measurement technology.

The digital pressure gauge is a pressure gauge which displays the measured pressure value by using numbers and can be used for measuring gauge pressure, differential pressure and absolute pressure. The digital pressure gauge has the advantages of simplicity, convenience, easy operation, stable performance, visual reading and the like, and is widely applied to nuclear power, energy, medicine and the like for measuring pressure parameters. According to JJG875-2019 digital pressure gauge verification rules, a pressure standard device is mainly utilized to be connected with a digital pressure gauge in series, a pressure standard value is provided through the pressure standard device, the numerical value of the digital pressure gauge is manually recorded, however, the digital pressure gauge is used more and more widely, the metering and calibrating services of the digital pressure gauge are increasingly aggravated, the current manual counting error rate is high, the process is complicated, the efficiency is low, the large batch of calibration tasks are difficult to meet, secondly, the measurement result is generally manually recorded, effective management and storage cannot be carried out on data, and the data processing in the future is influenced to a certain extent. Therefore, the traditional manual measurement cannot meet the requirement of actual measurement, and an automatic test system is urgently required.

SUMMERY OF THE UTILITY MODEL

The utility model provides a digital pressure gauge automatic calibration device based on image processing technique has solved current digital pressure gauge and has examined regularly, and artifical count error rate is high, the loaded down with trivial details scheduling problem of process.

The utility model discloses the following technical scheme of accessible realizes:

the utility model provides a digital pressure gauge automatic calibration device based on image processing technique, includes work platform, be provided with moving mechanism, calibration frame on the work platform, the last a plurality of cameras that set up of moving mechanism for the motion of control camera in X axle direction, Y axle direction and Z axle direction, be provided with a plurality of digital pressure gauges of treating the school on the calibration frame, a plurality of the camera sets up with a plurality of digital pressure gauges of treating the school one-to-one, is used for accomplishing the reading image acquisition of corresponding digital pressure gauge of treating the school, every digital pressure gauge of treating the school all communicates with pressure controller, pressure controller and mechanical pump, nitrogen gas storage jar intercommunication, pressure controller is used for controlling nitrogen gas storage jar to produce and accords with the required standard pressure of digital pressure gauge calibration of treating the school, still links to each other with the treater, the treater still links to each other with a plurality of cameras, touch-sensitive screen, the digital pressure meter calibration system is used for receiving the standard pressure of the pressure controller and the reading images collected by the cameras, automatically calibrating the digital pressure meters to be calibrated and displaying the calibration results on the touch screen.

Further, moving mechanism includes II shape support, and the montant of its both sides adopts extending structure, sets up the track on the horizontal pole at its top, be provided with a plurality of sliders on the track, every the slider all links to each other with the camera through the connecting rod, and can along rail movement, realizes that the camera is adjusted in X axle direction track direction's motion promptly, the connecting rod also adopts extending structure, realizes that the camera is adjusted in the motion of Y axle direction and Z axle direction.

Furthermore, the cross rod is of a hollow structure, a long-strip-shaped notch is formed in the surface of the cross rod along the axial direction of the cross rod, a plurality of movable sliding blocks are arranged inside the cross rod, the appearance of each sliding block is matched with the hollow structure of the cross rod, the diameter of each sliding block is larger than the width of the long-strip-shaped notch, a thread through hole is formed in the radial direction of each sliding block, and the thread through holes are matched with bolts to realize the movement and the fixed control of the sliding blocks in the.

Further, the connecting rod sets up to L shape structure, and the plane setting at its quarter butt perpendicular II shape support place, and its stock is on a parallel with the plane setting at II shape support place, the free end of quarter butt links to each other with the slider, the free end of stock links to each other with the camera, and both adopt the design of sleeve pipe structure, realize flexible function, and then realize the camera of being connected with it and adjust in the motion of Y axle direction and Z axle direction.

Further, the montant also adopts the design of sleeve pipe structure to realize flexible function in montant, quarter butt, stock, be provided with the screw thread through-hole near the sheathed tube tip in the outside, the screw thread through-hole realizes relative movement and fixed control between inboard sleeve pipe and the outside sleeve pipe with the bolt cooperation.

Further, the calibration frame includes the backup pad, the interval is provided with a plurality of gas circuit switching mouth in the backup pad, every the one end of gas circuit switching mouth all communicates with same pipeline, the pipeline communicates with pressure controller's test port, sets up the valve on it, every the other end of gas circuit switching mouth all communicates with the digital pressure gauge of treating the school.

The utility model discloses profitable technological effect lies in:

the camera can be controlled to move in the X-axis direction, the Y-axis direction and the Z-axis direction by means of the moving mechanism, so that the camera can be adjusted according to the position of the digital pressure gauge to be calibrated, accurate and clear reading images can be acquired, and the reading images are transmitted to the processor, the processor extracts reading information in the reading images through a processing technology and compares the reading information with standard pressure transmitted by the pressure controller, automatic calibration of the digital pressure gauges to be calibrated is achieved, manual recording is not needed in the whole process, the operation is convenient, the error rate is reduced, the operation efficiency and the intelligent level of calibration are improved, a calibration result can be displayed on the touch screen, the digital pressure gauge to be calibrated can be conveniently checked by a calibrator, the calibration result is stored in a system, and effective management and storage of data are achieved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the moving mechanism of the present invention;

fig. 3 is a schematic structural view of the cross bar of the present invention;

fig. 4 is a schematic structural diagram of the sleeve of the present invention;

the device comprises a working platform 1, a moving mechanism 2, a II-shaped support 21, a track 22, a sliding table 23, a connecting rod 24, a short rod 241, a long rod 242, a threaded through hole 25, a calibration frame 3, a gas path adapter port 31, a camera 4, a digital pressure gauge 5 to be calibrated, a pressure controller 6, a mechanical pump 7 and a nitrogen storage tank 8.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.

As shown in figure 1, the utility model provides an automatic digital pressure gauge calibration device based on image processing technology, which comprises a working platform 1, a moving mechanism 2 and a calibration frame 3 are arranged on the working platform 1, a plurality of cameras 4 are arranged on the moving mechanism 2 and used for controlling the movement of the cameras 4 in X-axis direction, Y-axis direction and Z-axis direction, a plurality of digital pressure gauges 5 to be calibrated are arranged on the calibration frame 3, the cameras 4 are arranged corresponding to the digital pressure gauges 5 to be calibrated one by one and used for completing the reading image acquisition of the corresponding digital pressure gauges 5 to be calibrated, each digital pressure gauge 5 to be calibrated is communicated with a pressure controller 6, the pressure controller 6 is communicated with a mechanical pump 7 and a nitrogen storage tank 8, the pressure controller 6 is used for controlling the nitrogen storage tank 8 to generate standard pressure meeting the calibration requirement of the digital pressure gauge 5 to be calibrated and is also connected with a processor, the processor is also connected with the plurality of cameras 4 and the touch screen, and is used for receiving the standard pressure of the pressure controller 6 and the reading images collected by the cameras 3, automatically calibrating the plurality of digital pressure gauges 5 to be calibrated, and displaying the calibration results on the touch screen. Therefore, the control movement of the camera 4 in the X-axis direction, the Y-axis direction and the Z-axis direction is realized by means of the moving mechanism, the camera can be adjusted according to the position of the corresponding digital pressure gauge 5 to be calibrated, the camera is enabled to be over against the display window of the digital pressure gauge 5 to be calibrated, accurate and clear reading images can be acquired, and the reading images are transmitted to the processor, the processor extracts reading information in the reading images through an image processing technology and compares the reading information with standard pressure transmitted by the pressure controller 6, automatic calibration of the digital pressure gauges 5 to be calibrated is realized, manual recording is not needed in the whole process, the error rate is reduced, the operation efficiency and the intelligent level of calibration are improved, a calibration result can be displayed on a touch screen, the calibration result can be conveniently checked by a calibrator, and the calibration result is stored in a system, and effective management and storage of data are realized.

As shown in fig. 2, the moving mechanism 2 includes an n-shaped support 21, the vertical bars on both sides of the support adopt a telescopic structure, a rail 22 is arranged on the cross bar at the top of the support, a plurality of sliders 23 are arranged on the rail 22, each slider 23 is connected with the camera 4 through a connecting rod 24 and can move along the rail 22, so that the camera 4 can move and adjust in the X-axis direction, i.e. the direction of the rail 22, the connecting rod 24 also adopts a telescopic structure, and the movement adjustment of the camera 4 in the Y-axis direction and the Z-axis direction is realized.

In particular, the cross bar is of a hollow structure, as shown in fig. 3, the surface of the cross bar is provided with elongated notches, i.e. rails 22, along the axial direction thereof, and a plurality of movable sliders 23 are arranged inside the cross bar, the shape of the sliders 23 is matched with the hollow structure of the cross bar, and the sliders can be cylindrical, the diameter of the slide block is larger than the width of the long-strip-shaped notch, so that most area of the slide block 23 is wrapped in the cross bar, a thread through hole 25 is arranged along the radial direction of the slide block, the threaded through hole 25 is matched with a bolt to realize the moving and fixing control of the slide block 23 in the X-axis direction, namely, when the position of the camera 4 in the X-axis direction needs to be adjusted, the bolt is unscrewed and moves towards the direction close to the elongated notch, the bolt is separated from the contact with the inner wall of the cross bar, in this way, the slide block 23 can move inside the cross bar, i.e. along the elongated notch, so as to drive the camera 4 connected therewith to move along the X-axis direction; when the position of the camera 4 is adjusted, the bolt is tightened to move the camera away from the elongated recess and toward the inner wall of the rail until the camera contacts the inner wall of the rail, so that the slider 23 is fixed inside the rail and cannot move.

In order to achieve adjustment of the movement of the camera 4 in the Y-axis and Z-axis directions, the connecting rod 24 is provided in an L-shaped configuration, the short rods 241 are arranged perpendicular to the plane of the II-shaped support 21, the long rods 242 are arranged parallel to the plane of the II-shaped support 21, the free end of the short rod 241 is connected with the sliding block 23, the free end of the long rod 242 is connected with the camera 4, both of which adopt the structural design of a sleeve to realize the telescopic function, thus, because the short rod 241 is perpendicular to the plane of the pi-shaped support 21, when the short rod 241 is extended or contracted, the camera 4 connected with the long rod 242 can be driven to move in the Y-axis direction, while the long rod 242 is arranged parallel to the plane of the pi-shaped support 21, when the long rod 242 is extended, the camera 4 connected with the driving device can be driven to move in the Z-axis direction, and then the movement adjustment of the camera in the Y-axis direction and the Z-axis direction is realized.

Meanwhile, in order to realize the locking of the adjusting position, a structure that the sliding block 23 is similar to the cross bar is adopted, namely, in the short bar 241 and the long bar 242, the end part close to the outer side sleeve is also provided with a thread through hole which is matched with a bolt, as shown in fig. 4, the relative movement and the fixed control between the inner side sleeve and the outer side sleeve are realized, namely, when the extension and retraction of the short bar 241 and the long bar 242 are required to be adjusted, the bolt is unscrewed and is separated from the contact of the inner side sleeve, so that the relative movement between the inner side sleeve and the outer side sleeve can be realized; when the adjustment is not needed, the bolt is screwed down to be in contact with the inner side sleeve, and the bolt and the inner side sleeve are fixed together. Of course, the vertical rod also adopts the design of a sleeve structure to realize the telescopic function.

This calibration frame 3 includes the backup pad, and the interval is provided with a plurality of gas circuit switching mouth 31 in the backup pad, and every gas circuit switching mouth 31's one end all communicates with same pipeline, and this pipeline communicates with pressure controller 6's test port, sets up the valve on it, and every gas circuit switching mouth 34's the other end all communicates with digital pressure gauge 5 of treating the school.

When the digital pressure gauge automatic calibration device based on the image processing technology is used for calibration, firstly, the air inlet ends of a plurality of digital pressure gauges 5 to be calibrated are communicated with the air channel adapter ports 31 on the calibration frame 3, then, according to the positions of the digital pressure gauges 5 to be calibrated, the movement adjustment of the corresponding cameras 4 in the X-axis, Y-axis and Z-axis directions is realized by the moving mechanism 2, so that the cameras are just opposite to the display windows of the digital pressure gauges 5 to be calibrated and locked, reading images can be accurately and clearly acquired, finally, the processor issues instructions to the pressure controller 6 according to the pressure values required by calibration, the pressure controller 6 controls the nitrogen storage tank 8 to generate standard pressure according with the required pressure values and feeds the standard pressure back to the processor, and then the cameras 4 acquire the reading images corresponding to the digital pressure techniques 5 to be calibrated and transmit the reading images to the processor, the processor extracts the reading information through an image processing technology, compares the reading information with the standard pressure transmitted by the pressure controller 6, realizes automatic calibration of a plurality of digital pressure gauges 5 to be calibrated, and issues a calibration report. To improve the accuracy of the calibration, the detection information may be collected at equal intervals.

When the negative pressure needs to be calibrated, for example, the pressure value of the vacuum digital pressure sensor is a negative value, the pressure controller 6 opens a communication switch with the mechanical pump 7, and the mechanical pump 7 pumps air from the pressure controller 6, so that the pressure controller 6 generates the negative pressure, and the calibration of the vacuum digital pressure sensor is realized.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and various changes or modifications may be made therein without departing from the principles and spirit of the invention, and therefore, the scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a digital pressure gauge automatic calibration device based on image processing technique which characterized in that: the device comprises a working platform, wherein a moving mechanism and a calibration frame are arranged on the working platform, a plurality of cameras are arranged on the moving mechanism and used for controlling the cameras to move in the X-axis direction, the Y-axis direction and the Z-axis direction, a plurality of digital pressure meters to be calibrated are arranged on the calibration frame in a one-to-one correspondence manner and used for completing the acquisition of reading images of the digital pressure meters to be calibrated correspondingly, each digital pressure meter to be calibrated is communicated with a pressure controller, the pressure controller is communicated with a mechanical pump and a nitrogen storage tank, the pressure controller is used for controlling the nitrogen storage tank to generate standard pressure meeting the calibration requirement of the digital pressure meters to be calibrated and is also connected with a processor, the processor is also connected with a plurality of cameras and a touch screen and used for receiving the standard pressure of the pressure controller and the reading images acquired by the cameras, and automatically calibrating the digital pressure gauges to be calibrated, and displaying the calibration results on the touch screen.

2. The automatic calibration device of digital pressure gauge based on image processing technology as claimed in claim 1, characterized in that: the moving mechanism comprises an n-shaped support, the vertical rods on two sides of the moving mechanism are of a telescopic structure, a rail is arranged on the transverse rod at the top of the moving mechanism, a plurality of sliding blocks are arranged on the rail, each sliding block is connected with the camera through a connecting rod and can move along the rail, the camera is adjusted in the X-axis direction, namely the motion of the camera in the rail direction, the connecting rods also adopt the telescopic structure, and the camera is adjusted in the motion of the Y-axis direction and the Z-axis direction.

3. The automatic calibration device of digital pressure gauge based on image processing technology as claimed in claim 2, characterized in that: the cross rod is of a hollow structure, a long-strip-shaped notch is formed in the surface of the cross rod along the axial direction of the cross rod, a plurality of movable sliding blocks are arranged inside the cross rod, the appearance of each sliding block is matched with the hollow structure of the cross rod, the diameter of each sliding block is larger than the width of the corresponding long-strip-shaped notch, a thread through hole is formed in the radial direction of each sliding block, and the thread through holes are matched with bolts to realize the movement and the fixed control of the sliding blocks.

4. The automatic calibration device of digital pressure gauge based on image processing technology as claimed in claim 2, characterized in that: the connecting rod sets up to L shape structure, and the plane setting at its quarter butt perpendicular II shape support place, and its stock is on a parallel with the plane setting at II shape support place, the free end of quarter butt links to each other with the slider, the free end of stock links to each other with the camera, and both adopt the design of sleeve pipe structure, realize flexible function, and then realize the camera of being connected with it and adjust in the motion of Y axle direction and Z axle direction.

5. The automatic calibration device of digital pressure gauge based on image processing technology as claimed in claim 4, characterized in that: the montant also adopts the design of sleeve pipe structure to realize flexible function in montant, quarter butt, stock, be provided with the screw thread through-hole near the sheathed tube tip in the outside, the screw thread through-hole realizes relative movement and fixed control between inboard sleeve pipe and the outside sleeve pipe with the bolt cooperation.

6. The automatic calibration device of digital pressure gauge based on image processing technology as claimed in claim 1, characterized in that: the calibration frame includes the backup pad, the interval is provided with a plurality of gas circuit switching mouth in the backup pad, every the one end of gas circuit switching mouth all communicates with same pipeline, the pipeline communicates with pressure controller's test port, sets up the valve on it, every the other end of gas circuit switching mouth all communicates with the digital pressure gauge of waiting to check.