Pressure test system for calibrating transmitter

Abstract

The invention discloses a pressure test system for calibrating a transmitter, which relates to the technical field of pressure test, and comprises a temperature control chamber, a dynamic pressure loading module, a temperature and pressure synchronous acquisition module, a connecting pipe, a butt joint mechanism and an embedded compensation algorithm module, the temperature control chamber is used for simulating the working environment temperature of the transmitter body, the dynamic pressure loading module is installed on one side of the outer wall of the temperature control chamber, the temperature and pressure synchronous acquisition module is installed in an inner cavity of the temperature control chamber, the two opposite connecting pipes are installed on the two sides of the temperature control chamber, and the butt joint mechanism is used for connecting the transmitter body with the connecting pipes. And the embedded compensation algorithm module is mounted at the top of the double-chamber. The temperature control cavity simulates the temperature of the transmitter body in different working environments, and small-range pressure fluctuation environment simulation is performed on the pressure source through the uncontrollable dynamic pressure loading module, so that the transmitter can be accurately tested.

Description

Technical Field

[0001] The invention relates to the technical field of pressure testing, and in particular to a pressure testing system for calibrating a transmitter. Background Art

[0002] In modern industrial automation control systems, transmitters are a key measuring device that is widely used in the monitoring and control of parameters such as pressure, temperature, and flow. The accuracy and reliability of transmitters directly affect the performance of the entire control system.

[0003] Since the transmitter works in a harsh industrial environment for a long time, affected by factors such as temperature and humidity, its measurement accuracy may gradually decrease, and there may be certain errors in the manufacturing process of the transmitter. Therefore, regular calibration of the transmitter to ensure the accuracy of its output signal is an important measure to ensure the reliability of industrial process control.

[0004] The existing pressure testing system mainly relies on manual operation. The adjustment and measurement accuracy of the pressure source is low and the operation is complicated. The adjustment of the pressure source relies on the existing pressure pump system, that is, the test is carried out through static pressure compensation. When the transmitter is used, there are small-scale abnormal pressure fluctuations, which makes it difficult to test. This affects the accuracy and efficiency of the transmitter test. Summary of the invention

[0005] The object of the present invention is to provide a pressure testing system for calibrating a transmitter to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a pressure testing system for calibrating a transmitter, comprising: A temperature control chamber, wherein the inner cavity of the temperature control chamber is provided with a transmitter body, and the temperature control chamber is used to simulate the working environment temperature of the transmitter body; A dynamic pressure loading module, wherein the dynamic pressure loading module is installed on one side of the outer wall of the temperature control chamber; A temperature and pressure synchronous acquisition module, which is installed in the inner cavity of the temperature control chamber and is used for data acquisition at both ends of the transmitter body; A connecting pipe, installed on both sides of the temperature control chamber relative to the two connecting pipes; A docking mechanism, which is used to connect the transmitter body and the connecting pipe; An embedded compensation algorithm module is installed on the top of the dual chamber.

[0007] Preferably, the temperature control chamber comprises: A double chamber, wherein the double chamber is provided with two cavities, and the two connecting pipes are respectively fixedly inserted and connected with the two sides of the double chamber; A sealing door, the sealing door being installed on the front side of the double chamber; A gradient temperature control device is installed on the inner wall of the double chamber.

[0008] Preferably, the dynamic pressure loading module comprises: A centralizing box, wherein the centralizing box is fixed to one side of the temperature-controlled chamber; A liquid inlet pipe, the liquid inlet pipe is fixedly inserted into one side of the centralizing box; A liquid inlet mechanism, the liquid inlet mechanism is installed in the inner cavity of the concentration box near one end of the connecting pipe; An abnormal pressure wave generating unit, wherein the abnormal pressure wave generating unit is installed on the top of the liquid inlet mechanism; A filter mechanism, the filter mechanism is installed on the inner wall of the inner cavity of the concentration box close to the liquid inlet pipe; The control and regulation unit includes a multi-stage pressure regulation unit and a closed-loop feedback control unit. The multi-stage pressure regulation unit is composed of a coarse-adjustment pneumatic valve and a fine-adjustment piezoelectric valve, and supports step pressure and ramp pressure output. The closed-loop feedback control unit adjusts the pressure in real time based on the transmitter output signal.

[0009] Preferably, the centralized box comprises: A fixed box, wherein the liquid inlet pipe is fixedly inserted and connected with one side of the fixed box; A protective plate, the protective plate being fixed to the bottom of the inner wall of the fixing box; The plug is sealed and inserted into the bottom of the fixing box, and the top of the plug is used for inserting and clamping the bottom of the filtering mechanism.

[0010] Preferably, the liquid inlet mechanism comprises: A feed pipe, the feed pipe is installed in the inner cavity of the fixed box through a support frame; An elastic rubber sleeve, which is sleeved on the inner cavity of the feed pipe and turned outward on the outer wall end of the feed pipe, and the inner cavity of the elastic rubber sleeve is fixedly connected to one end of one of the connecting pipes; A clamp, which is tied to the end of the elastic rubber sleeve turned outward, and is used to fix the elastic rubber sleeve and the feed pipe; An anti-sliding block, a plurality of which are fixed to the inner wall of the clamp in a ring array; The adjusting groove is opened in the middle of the feeding pipe.

[0011] Preferably, the abnormal pressure wave generating unit comprises: An electric telescopic rod, wherein the electric telescopic rod is fixed to the top of the fixing box; A T-block, wherein the T-block is fixed to the telescopic end of the electric telescopic rod; A compression spring, wherein the compression spring is sleeved on the outer wall of the T-shaped block; A bracket, wherein the bracket is fixed to the bottom of the compression spring, and the bottom of the T-block is slidably interlaced with the top of the bracket; A positioning ring, the positioning ring is fixed to the bottom of the bracket; A pressing plate is fixed to the bottom of the T-block, the pressing plate is slidably and interlacedly connected with the middle of the positioning ring, and the pressing plate is used for pressing the elastic rubber sleeve.

[0012] Preferably, the filtering mechanism comprises: A support rod, wherein the support rod is fixed to the top of the fixing box; A filter bucket, the filter bucket is rotated at the bottom of the support rod through a pin shaft, and the top of the plug is inserted and clamped with the bottom of the filter bucket; The filter screen is fixedly embedded in a side of the filter bucket close to the liquid inlet mechanism.

[0013] Preferably, the temperature and pressure synchronous acquisition module includes: A temperature sensor is installed on one of the connecting pipes; A pressure sensor is installed on the other connecting pipe.

[0014] Preferably, the docking mechanism comprises: A flanged expansion pipe installed at one end of the connecting pipe that is butted against the transmitter body; A guide block, wherein a plurality of guide blocks are fixed in a circular array to the flange end of the flange telescopic tube; A first movable rod, wherein the first movable rod is fixed to one side of one of the flanged telescopic tubes; A hydraulic cylinder, wherein the telescopic end of the hydraulic cylinder is fixed to one end of the first movable rod, and the bottom of the hydraulic cylinder is fixed to the inner wall of the double chamber; A second movable rod, the second movable rod being fixed to the other side of the other flanged telescopic tube; A rotating gear is meshed between the first movable rod and the second movable rod, and the rotating gear is installed in the middle of the double chamber through a rotating shaft.

[0015] Preferably, the embedded compensation algorithm module includes: A temperature-pressure coupling model, wherein the temperature-pressure coupling model uses a cubic polynomial to fit the relationship between the transmitter output error and the temperature to generate a segmented compensation coefficient; An adaptive filtering algorithm module, wherein the adaptive filtering algorithm module is used to eliminate signal noise caused by sudden temperature changes; A predictive maintenance unit, wherein the predictive maintenance unit trains an LSTM neural network based on historical calibration data to predict a transmitter life attenuation curve; Dynamic calibration threshold module, when the transmitter output error exceeds the preset threshold, trigger automatic recalibration; A multi-sensor data fusion unit is used to integrate calibration data of transmitters of the same batch.

[0016] Technical effects and advantages of the present invention: The present invention adopts a setting mode in which a temperature control chamber, a dynamic pressure loading module, and a temperature and pressure synchronous acquisition module are matched. The temperature control chamber simulates the temperature of the transmitter body under different working environments, and simulates a small range of pressure fluctuation environment of the pressure source through an uncontrollable dynamic pressure loading module, so as to facilitate the judgment of whether the data on the transmitter body is matched with the data of the temperature and pressure synchronous acquisition module, so that the transmitter can be accurately tested. The present invention adopts a setting mode in which the connecting pipe and the docking mechanism cooperate, so that the first movable rod can drive one of the flanged telescopic tubes to move through the driving of the hydraulic cylinder, and the steering gear can drive the second movable rod to move the other flanged telescopic tube, so that the two flanged telescopic tubes can be separated from the connecting flanges at both ends of the transmitter body, so that the transmitter body can be easily disassembled, assembled and replaced in the inner cavity of the temperature control chamber, and is suitable for testing different transmitter bodies, thereby improving the high efficiency performance of the test; The present invention adopts a setting mode that cooperates with the dynamic pressure loading module and the embedded compensation algorithm module, so that it can perform multi-level pressure regulation and real-time pressure adjustment on the transmitter body, and perform segmented temperature and pressure compensation through the embedded compensation algorithm module, and calibrate according to the output error of the transmitter, thereby improving the calibration accuracy and equipment life prediction capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall front structure of the system of the present invention.

[0019] Figure 3 It is a schematic diagram of the top structure of the double chamber structure of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the fixing box of the present invention.

[0021] Figure 5 It is a schematic diagram of the side sectional structure of the adjustment groove of the present invention.

[0022] Figure 6 It is a schematic diagram of a partial side sectional structure of the feed pipe of the present invention.

[0023] Figure 7 This is a system framework diagram of the present invention.

[0024] Figure 8 This is a framework diagram of the temperature control chamber of the present invention.

[0025] Fig. 9 This is a framework diagram of the dynamic pressure loading module of the present invention.

[0026] Fig.10 This is a framework diagram of the temperature and pressure synchronous acquisition module of the present invention.

[0027] Fig.11 This is a framework diagram of the embedded compensation algorithm module of the present invention.

[0028] Fig.12 This is a framework diagram of the multi-dimensional calibration strategy module of the present invention.

[0029] In the figure: 1. temperature control chamber; 11. double chamber; 12. sealed door; 13. gradient temperature control device; 2. dynamic pressure loading module; 21. central box; 211. fixed box; 212. protective plate; 213. plug; 22. liquid inlet pipe; 23. liquid inlet mechanism; 231. feed pipe; 232. elastic rubber sleeve; 233. clamp; 234. anti-sliding block; 235. adjustment slot; 24. abnormal pressure wave generating unit; 241. electric telescopic rod; 242. T-block; 243. compression spring; 244 , bracket; 245, positioning ring; 246, pressure plate; 25, filtering mechanism; 251, support rod; 252, filter bucket; 253, filter net; 26, control and adjustment unit; 3, transmitter body; 4, temperature and pressure synchronous acquisition module; 41, temperature sensor; 42, pressure sensor; 5, connecting pipe; 6, docking mechanism; 61, expansion pipe with flange; 62, guide block; 63, first movable rod; 64, hydraulic cylinder; 65, second movable rod; 66, rotating gear; 7, embedded compensation algorithm module. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides Figure 1-12A pressure testing system for calibrating a transmitter is shown, comprising: a temperature control chamber 1, a dynamic pressure loading module 2, a temperature and pressure synchronous acquisition module 4, a connecting pipe 5, a docking mechanism 6 and an embedded compensation algorithm module 7. The inner cavity of the temperature control chamber 1 is provided with a transmitter body 3, the temperature control chamber 1 is used to simulate the working environment temperature of the transmitter body 3, the dynamic pressure loading module 2 is installed on one side of the outer wall of the temperature control chamber 1, the temperature and pressure synchronous acquisition module 4 is installed in the inner cavity of the temperature control chamber 1, the temperature and pressure synchronous acquisition module 4 is used for data acquisition at both ends of the transmitter body 3, two relatively connecting pipes 5 are installed on both sides of the temperature control chamber 1, the docking mechanism 6 is used to connect the transmitter body 3 with the connecting pipe 5, and the embedded compensation algorithm module 7 is installed on the top of the double chamber 11.

[0032] Among them, the temperature control chamber 1 includes a dual chamber 11, a sealed door 12 and a gradient temperature control device 13. A controller is installed on the top of the dual chamber 11. The dual chamber 11 is arranged in two cavities, and the two cavities are connected by an electromagnetic valve. The two connecting pipes 5 are fixedly connected with the two sides of the dual chamber 11 respectively. The sealed door 12 is installed on the front of the dual chamber 11. The gradient temperature control device 13 is installed on the inner wall of the dual chamber 11. The gradient temperature control device 13 is composed of an existing thermoelectric module and a liquid cooling circulation system. The thermoelectric module realizes rapid heating and cooling of the inner cavity of the dual chamber 11 through current direction control. The liquid cooling circulation system integrates the heat dissipation pipeline and the servo motor cooling circuit. The excess heat is quickly discharged through the circulating coolant to prevent the equipment from overheating, which is convenient for realizing temperature regulation of the inner cavity of the dual chamber 11, and realizing strict monotonic increase or decrease of the inner cavity temperature of the dual chamber 11, which is suitable for full measurement of the transmitter body 3.

[0033] In addition, the dynamic pressure loading module 2 includes a centralizing box 21, a liquid inlet pipe 22, a liquid inlet mechanism 23, an abnormal pressure wave generating unit 24, a filtering mechanism 25 and a control and adjustment unit 26. The centralizing box 21 is fixed to one side of the temperature control chamber 1, the liquid inlet pipe 22 is fixedly inserted into one side of the centralizing box 21, the liquid inlet mechanism 23 is installed at one end of the inner cavity of the centralizing box 21 close to the connecting pipe 5, the abnormal pressure wave generating unit 24 is installed on the top of the liquid inlet mechanism 23, and the filtering mechanism 25 is installed on the inner wall of the inner cavity of the centralizing box 21 close to the liquid inlet pipe 22. The filtering mechanism 25 can filter the liquid entering from the inner cavity of the liquid inlet pipe 22 to prevent the measurement error of the transmitter body 3 caused by impurities. The control and adjustment unit 2 6 includes a multi-stage pressure regulating unit and a closed-loop feedback control unit. The multi-stage pressure regulating unit is composed of a coarse adjustment pneumatic valve and a fine adjustment piezoelectric valve. The multi-stage pressure regulating unit is installed at one end of the connecting pipe 5 close to the central box 21, and supports step pressure (0→100%FS response time ≤10ms) and ramp pressure (0.001-10MPa / s adjustable) output. The closed-loop feedback control unit adjusts the pressure in real time based on the transmitter output signal, and the control accuracy is ≤0.05%FS. The closed-loop feedback control unit forms a closed control loop, which has both a signal forward path from input to output and a signal path from the output end to the input end, so as to realize precise control of the pressure test system.

[0034] Specifically, the concentrated box 21 includes a fixed box 211, a protective plate 212 and a plug 213. The liquid inlet pipe 22 is fixedly inserted and connected with one side of the fixed box 211. The liquid inlet pipe 22 transmits the liquid source to the inner cavity of the fixed box 211 through a pressure pump. The fixed box 211 includes a box body and a sealing cover. The sealing cover fixes the box body with bolts, and the sealing cover and the box body are disassembled and assembled by bolts to realize the disassembly and assembly of the inner cavity of the fixed box 211. The protective plate 212 is fixed to the bottom of the inner wall of the fixed box 211. The protective plate 212 is an arc-shaped structure to prevent the residue filtered by the filter mechanism 25 from flowing to other positions of the fixed box 211 at will. The plug 213 is sealed and inserted into the bottom of the fixed box 211. The top of the plug 213 is used for the insertion and clamping of the bottom of the filter mechanism 25. The top of the plug 213 is a straight rod structure. The discharge of dirt in the inner cavity of the fixed box 211 is realized by detaching the plug 213 from the fixed box 211.

[0035] Furthermore, the liquid inlet mechanism 23 includes a feed pipe 231, an elastic rubber sleeve 232, a clamp 233, an anti-sliding block 234 and an adjustment slot 235. The feed pipe 231 is installed in the inner cavity of the fixed box 211 through a support frame. The elastic rubber sleeve 232 is sleeved in the inner cavity of the feed pipe 231 and turned outward at the outer wall end of the feed pipe 231. The inner cavity of the elastic rubber sleeve 232 is fixedly connected to one end of one of the connecting pipes 5. The clamp 233 is tied to the end of the turned-out elastic rubber sleeve 232. The clamp 233 is used to fix the elastic rubber sleeve 232 and the feed pipe 231. A plurality of anti-sliding blocks 234 are fixed in a circular array. The inner wall of the clamp 233, through the setting of the anti-sliding block 234, is convenient to increase the friction between the inner wall of the clamp 233 and the elastic rubber sleeve 232, thereby improving the locking performance of the clamp 233 on the elastic rubber sleeve 232. At the same time, the clamp 233 is used to realize the disassembly, assembly and replacement of the elastic rubber sleeve 232. The adjustment groove 235 is opened in the middle of the feed pipe 231, so that the elastic rubber sleeve 232 can be exposed through the adjustment groove 235. Through the elasticity of the elastic rubber sleeve 232, the abnormal pressure wave generating unit 24 can squeeze the elastic rubber sleeve 232 to realize the abnormal water pressure flow in the inner cavity of the elastic rubber sleeve 232.

[0036] Furthermore, the abnormal pressure wave generating unit 24 includes an electric telescopic rod 241, a T-block 242, a compression spring 243, a bracket 244, a positioning ring 245 and a pressure plate 246. The electric telescopic rod 241 is fixed to the top of the fixing box 211, and the electric telescopic rod 241 is electrically connected to the external power supply through an external controller. The T-block 242 is fixed to the telescopic end of the electric telescopic rod 241, the compression spring 243 is sleeved on the outer wall of the T-block 242, the bracket 244 is fixed to the bottom of the compression spring 243, the bottom of the T-block 242 is slidably connected with the top of the bracket 244, and the positioning ring 245 is fixed to the bottom of the bracket 244. The structure of the positioning ring 245 cooperates with the groove body opening structure of the adjustment groove 235, so that the positioning ring 245 can be embedded in the inner cavity of the adjustment groove 235, so that the positioning ring 245 can be pressed against the elastic rubber sleeve 2 The outer wall of the T-block 242 is protected to reduce the protrusion of the non-restricted area of ​​the elastic rubber sleeve 232 when the pressure plate 246 is pressed down. The pressure plate 246 is fixed to the bottom of the T-block 242. The pressure plate 246 is slidably and interlacedly connected with the middle part of the positioning ring 245. The pressure plate 246 is used to press the elastic rubber sleeve 232. The electric telescopic rod 241 is driven to facilitate the pressure plate 246 to press down the elastic rubber sleeve 232, so as to adjust the cross-sectional area of ​​the water flow in the inner cavity of the elastic rubber sleeve 232 and control the water pressure entering the inner cavity of the connecting pipe 5. According to the different pressing depths of the pressure plate 246, different pressure settings in a small range are performed, so that it can perform a small-scale pressure fluctuation environment simulation. Through the pressure wave environment simulation setting of the mechanical structure, the prediction of the design value of the traditional electric control pressure regulating valve data is avoided, and the accuracy of the pressure test of the transmitter body 3 is improved.

[0037] Secondly, the filtering mechanism 25 includes a support rod 251, a filter bucket 252 and a filter screen 253. The support rod 251 is fixed to the top of the fixed box 211, and the filter bucket 252 is rotated at the bottom of the support rod 251 through a pin shaft. The top of the plug 213 is inserted and connected with the bottom of the filter bucket 252. The filter screen 253 is fixedly embedded in the side of the filter bucket 252 close to the liquid inlet mechanism 23, and the filter bucket 252 is tightly fitted with the inner wall of the fixed box 211. The filter screen 253 can filter the liquid entering the liquid inlet pipe 22, reduce the error influence caused by impurities on the detection and testing of the transmitter body 3, and through the disassembly and assembly of the plug 213, the position of the filter bucket 252 can be limited and released, so that the impurities in the inner cavity of the filter bucket 252 can be removed when the fixed box 211 is regularly cleaned, which is convenient for the reuse of resources.

[0038] At the same time, the docking mechanism 6 includes a flanged telescopic tube 61, a guide block 62, a first movable rod 63, a hydraulic cylinder 64, a second movable rod 65 and a rotating gear 66. The flanged telescopic tube 61 is a corrugated telescopic end with a flange installed. The flanged telescopic tube 61 is installed at one end of the connecting pipe 5 that is docked with the transmitter body 3. The opposite ends of the two flanged telescopic tubes 61 are fixedly connected to the two connecting pipes 5 respectively. A sealing ring is fixed at one end of the flanged telescopic tube 61 to facilitate sealing and clamping at the end docked with the transmitter body 3. Multiple guide blocks 62 are fixed in a circular array to the flange end of the flanged telescopic tube 61. The first movable rod 63 is fixed to one side of the flanged telescopic tube 61. The telescopic end of the hydraulic cylinder 64 is fixed to the first movable rod At one end of 63, the bottom of the hydraulic cylinder 64 is fixed to the inner wall of the dual chamber 11, the hydraulic cylinder 64 is electrically connected to the external power supply through an external controller, the second movable rod 65 is fixed to the other side of the other flanged telescopic tube 61, the rotating gear 66 is meshed between the first movable rod 63 and the second movable rod 65, the rotating gear 66 is installed in the middle of the dual chamber 11 through the rotating shaft, and the meshing setting of the rotating gear 66 and the first movable rod 63 and the second movable rod 65 enables the first movable rod 63 and the second movable rod 65 to perform synchronous relative movement, so that it can drive the two flanged telescopic tubes 61 to dock with the two ends of the transmitter body 3, realize the rapid connection of the transmitter body 3, and improve the testing efficiency of different transmitter bodies 3.

[0039] In addition, the temperature and pressure synchronous acquisition module 4 includes a temperature sensor 41 and a pressure sensor 42. The temperature sensor 41 is installed on one of the connecting tubes 5, and the pressure sensor 42 is installed on the other connecting tube 5. The temperature sensor 41 and the pressure sensor 42 are used for real-time detection of the temperature and pressure at both ends of the transmitter body 3.

[0040] The embedded compensation algorithm module 7 includes a temperature-pressure coupling model, an adaptive filtering algorithm module, a predictive maintenance unit, a dynamic calibration threshold module and a multi-sensor data fusion unit. The temperature-pressure coupling model uses a cubic polynomial to fit the relationship between the transmitter output error and the temperature to generate a segmented compensation coefficient. The adaptive filtering algorithm module is used to eliminate the signal noise caused by sudden temperature changes, and the signal-to-noise ratio is improved by ≥20dB. The predictive maintenance unit trains the LSTM neural network based on historical calibration data to predict the transmitter life attenuation curve; the dynamic calibration threshold module triggers automatic recalibration when the transmitter output error exceeds the preset threshold. The multi-sensor data fusion unit is used to integrate the calibration data of the same batch of transmitters, and the multi-sensor data fusion unit is connected to the temperature sensor 41 and the pressure sensor 42 on the temperature and pressure synchronization acquisition module 4, which is convenient for integrating the data collected by the temperature sensor 41 and the pressure sensor 42, thereby improving the calibration accuracy and equipment life prediction capabilities.

[0041] Working principle of the present invention: When in use, the sealing door 12 is opened, the transmitter body 3 is set in the inner cavity of the double chamber 11, and the hydraulic cylinder 64 is driven by the controller so that the flange telescopic tube 61 can clamp and fix the transmitter body 3 in the relative position, the sealing door 12 is closed, and the gradient temperature control device 13 is driven according to the set value to simulate the temperature environment of the inner cavity of the double chamber 11, and the pressure pump at the end of the liquid inlet pipe 22 is started so that the liquid can enter the inner cavity of the fixing box 211 and be filtered through the filter screen 253, and the liquid enters the inner cavity of the elastic rubber sleeve 232, and the elastic rubber sleeve 232 is adjusted according to the regulation of the electric telescopic rod 241. 2 The cross-sectional area of ​​the water flow in the inner cavity is adjusted so that it can simulate different pressure waves to test the transmitter body 3. The temperature and pressure of the liquid flowing in the inner cavity of the connecting tube 5 are tested by the temperature and pressure synchronous acquisition module 4, and compared with the test results of the transmitter body 3. The multi-stage pressure adjustment test and signal control are performed through the control and adjustment unit 26. The relationship between the transmitter output error and the temperature is fitted through the embedded compensation algorithm module 7 to generate a segmented compensation coefficient, eliminate the signal noise caused by the sudden temperature change, predict the transmitter life attenuation curve and calibrate it, and improve the calibration accuracy of the system and the equipment life prediction ability.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure test system for calibrating a transmitter, characterized in that: include: A temperature control chamber (1), wherein the inner cavity of the temperature control chamber (1) is provided with a transmitter body (3), and the temperature control chamber (1) is used to simulate the working environment temperature of the transmitter body (3); A dynamic pressure loading module (2), wherein the dynamic pressure loading module (2) is installed on one side of an outer wall of the temperature control chamber (1); A temperature and pressure synchronous acquisition module (4), the temperature and pressure synchronous acquisition module (4) being installed in the inner cavity of the temperature control chamber (1), the temperature and pressure synchronous acquisition module (4) being used for data acquisition at both ends of the transmitter body (3); Connecting pipes (5), installed on two sides of the temperature control chamber (1) relative to the two connecting pipes (5); A docking mechanism (6), the docking mechanism (6) being used for connecting the transmitter body (3) and the connecting pipe (5); An embedded compensation algorithm module (7), wherein the embedded compensation algorithm module (7) is installed on the top of the double chamber (11).

2. A pressure testing system for calibrating a transmitter according to claim 1, characterized in that: The temperature control chamber (1) comprises: A double chamber (11), wherein the double chamber (11) is provided in the form of two cavities, and the two connecting pipes (5) are respectively fixedly interlaced and connected to two sides of the double chamber (11); A sealing door (12), wherein the sealing door (12) is installed on the front side of the double chamber (11); A gradient temperature control device (13), wherein the gradient temperature control device (13) is installed on the inner wall of the double chamber (11).

3. A pressure testing system for calibrating a transmitter according to claim 1, characterized in that: The dynamic pressure loading module (2) comprises: A centralizing box (21), wherein the centralizing box (21) is fixed to one side of the temperature-controlled chamber (1); A liquid inlet pipe (22), the liquid inlet pipe (22) being fixedly inserted into one side of the centralizing box (21); A liquid inlet mechanism (23), the liquid inlet mechanism (23) being installed in the inner cavity of the concentration box (21) near one end of the connecting pipe (5); An abnormal pressure wave generating unit (24), wherein the abnormal pressure wave generating unit (24) is installed on the top of the liquid inlet mechanism (23); A filtering mechanism (25), the filtering mechanism (25) being mounted on an inner wall of the inner cavity of the concentration box (21) close to the liquid inlet pipe (22); A control and regulation unit (26), the control and regulation unit (26) comprising a multi-stage pressure regulation unit and a closed-loop feedback control unit, the multi-stage pressure regulation unit comprising a coarse adjustment pneumatic valve and a fine adjustment piezoelectric valve, supporting step pressure and ramp pressure output, the closed-loop feedback control unit adjusting the pressure in real time based on a transmitter output signal.

4. A pressure testing system for calibrating a transmitter according to claim 3, characterized in that: The centralizing box (21) comprises: A fixed box (211), wherein the liquid inlet pipe (22) is fixedly connected to one side of the fixed box (211); A protective plate (212), wherein the protective plate (212) is fixed to the bottom of the inner wall of the fixing box (211); A plug (213) is sealed and inserted into the bottom of the fixing box (211); the top of the plug (213) is used for insertion and clamping of the bottom of the filtering mechanism (25).

5. A pressure testing system for calibrating a transmitter according to claim 4, characterized in that: The liquid inlet mechanism (23) comprises: A feed pipe (231), wherein the feed pipe (231) is installed in the inner cavity of the fixed box (211) via a support frame; an elastic rubber sleeve (232), the elastic rubber sleeve (232) being sleeved on the inner cavity of the feed pipe (231) and turned outward on the outer wall end of the feed pipe (231), the inner cavity of the elastic rubber sleeve (232) being fixedly connected to one end of one of the connecting pipes (5); A clamp (233), the clamp (233) being tied to the end of the outwardly turned elastic rubber sleeve (232), the clamp (233) being used to fix the elastic rubber sleeve (232) and the feed pipe (231); An anti-sliding block (234), wherein a plurality of the anti-sliding blocks (234) are fixed to the inner wall of the clamp (233) in an annular array; An adjustment groove (235), wherein the adjustment groove (235) is opened in the middle of the feed pipe (231).

6. A pressure testing system for calibrating a transmitter according to claim 5, characterized in that: The abnormal pressure wave generating unit (24) comprises: An electric telescopic rod (241), wherein the electric telescopic rod (241) is fixed to the top of the fixing box (211); A T-shaped block (242), wherein the T-shaped block (242) is fixed to the telescopic end of the electric telescopic rod (241); A compression spring (243), wherein the compression spring (243) is sleeved on the outer wall of the T-shaped block (242); A bracket (244), wherein the bracket (244) is fixed to the bottom of the compression spring (243), and the bottom of the T-shaped block (242) is slidably interlaced with the top of the bracket (244); A positioning ring (245), wherein the positioning ring (245) is fixed to the bottom of the bracket (244); A pressing plate (246) is fixed to the bottom of the T-shaped block (242), the pressing plate (246) is slidably connected with the middle of the positioning ring (245), and the pressing plate (246) is used to press the elastic rubber sleeve (232).

7. A pressure testing system for calibrating a transmitter according to claim 4, characterized in that: The filtering mechanism (25) comprises: A support rod (251), wherein the support rod (251) is fixed to the top of the fixing box (211); A filter bucket (252), the filter bucket (252) being rotated on the bottom of the support rod (251) via a pin shaft, and the top of the plug (213) being inserted and clamped with the bottom of the filter bucket (252); A filter screen (253) is fixedly embedded in a side of the filter bucket (252) close to the liquid inlet mechanism (23).

8. A pressure testing system for calibrating a transmitter according to claim 2, characterized in that: The temperature and pressure synchronous acquisition module (4) comprises: a temperature sensor (41), wherein the temperature sensor (41) is mounted on one of the connecting pipes (5); A pressure sensor (42) is installed on another connecting pipe (5).

9. A pressure testing system for calibrating a transmitter according to claim 2, characterized in that: The docking mechanism (6) comprises: A flanged expansion pipe (61), the flanged expansion pipe (61) being installed at one end of the connecting pipe (5) butted against the transmitter body (3); A guide block (62), wherein a plurality of the guide blocks (62) are fixed in a ring array to the flange end of the flange telescopic tube (61); A first movable rod (63), the first movable rod (63) being fixed to one side of one of the flanged telescopic tubes (61); A hydraulic cylinder (64), wherein the telescopic end of the hydraulic cylinder (64) is fixed to one end of the first movable rod (63), and the bottom of the hydraulic cylinder (64) is fixed to the inner wall of the double chamber (11); a second movable rod (65), the second movable rod (65) being fixed to the other side of the other flanged telescopic tube (61); A rotating gear (66), the rotating gear (66) is meshed between the first movable rod (63) and the second movable rod (65), and the rotating gear (66) is installed in the middle of the double chamber (11) via a rotating shaft.

10. A pressure testing system for calibrating a transmitter according to claim 1, characterized in that: The embedded compensation algorithm module (7) comprises: A temperature-pressure coupling model, wherein the temperature-pressure coupling model uses a cubic polynomial to fit the relationship between the transmitter output error and the temperature to generate a segmented compensation coefficient; An adaptive filtering algorithm module, wherein the adaptive filtering algorithm module is used to eliminate signal noise caused by sudden temperature changes; A predictive maintenance unit, wherein the predictive maintenance unit trains an LSTM neural network based on historical calibration data to predict a transmitter life attenuation curve; Dynamic calibration threshold module, when the transmitter output error exceeds the preset threshold, trigger automatic recalibration; A multi-sensor data fusion unit is used to integrate calibration data of transmitters of the same batch.

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