1. Temperature and pressure sensor detecting system for gas table, its characterized in that: the device comprises a high-low temperature box (EP) for providing a test temperature for a test environment and an air source for providing a test air pressure for the test environment, wherein a test device is arranged in the high-low temperature box, a pressure barrel internally provided with a temperature-measured pressure sensor is arranged in the test device, the test device is communicated with the air source through an air pipeline penetrating through the high-low temperature box, and the test device is also communicated with the outside through an exhaust pipeline penetrating through the high-low temperature box; the signal input end of the testing device is connected with the control panel, and the signal output end of the testing device is connected with the upper computer used for analyzing and displaying the testing data.

2. The temperature and pressure sensor detection system for a gas meter according to claim 1, characterized in that: the gas source comprises a positive pressure gas source and a negative pressure gas source, the gas pipeline comprises a gas inlet pipeline communicated with the testing device and the positive pressure gas source and a gas extraction pipeline communicated with the testing device and the negative pressure gas source, the gas inlet pipeline positioned outside the high-low temperature box is connected with a positive pressure gas inlet valve (V1) in series, and the gas inlet pipeline positioned inside the high-low temperature box is connected with a positive pressure gas supply valve (V3) in series; a negative pressure air exhaust valve (V2) is connected in series on the air exhaust pipeline positioned outside the high-low temperature box, and a negative pressure air supply valve (V5) is connected in series on the air exhaust pipeline positioned inside the high-low temperature box; the air inlet pipeline positioned in the high-low temperature box is also communicated with the outside through an exhaust pipeline provided with a negative pressure exhaust valve (V4), and the air exhaust pipeline positioned in the high-low temperature box is also communicated with the outside through an exhaust pipeline provided with a positive pressure exhaust valve (V6).

3. The temperature and pressure sensor detection system for a gas meter according to claim 2, characterized in that: the control panel is provided with a single chip microcomputer, a valve driving circuit, a power supply key, a confirmation key, a positive pressure key and a negative pressure key, the power supply key is connected in series with a wire between a power supply and a testing device, the output ends of the positive pressure key, the confirmation key and the negative pressure key are respectively connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is respectively connected with the controlled end of a positive pressure air inlet valve, a positive pressure air supply valve, a positive pressure exhaust valve, a negative pressure air exhaust valve, a negative pressure exhaust valve and a negative pressure air supply valve through the valve driving circuit.

4. The temperature and pressure sensor detection system for a gas meter according to claim 2, characterized in that: and a heat exchanger (E) for controlling the temperature of the gas in the gas inlet pipeline is connected on the gas inlet pipeline between the positive pressure gas supply valve (V3) and the testing device in the high-low temperature box, and the controlled end of the heat exchanger is connected with the temperature control signal output end of the high-low temperature box.

5. The temperature and pressure sensor detection system for a gas meter according to claim 1, characterized in that: data acquisition and analysis software is arranged in the upper computer, detection data of each test unit of the test device is displayed on a display interface of the upper computer, and the qualified state of the temperature-measured pressure sensor is expressed through background color conversion of the test units.

6. The temperature and pressure sensor detection system for a gas meter according to claim 2, characterized in that: the testing device comprises a tray, a plurality of positioning barrels are fixedly arranged on the top end face of the tray, and pressure barrels (4) are assembled in the positioning barrels; the top of the pressure barrel is provided with a barrel cover (5), the bottom end face of the barrel cover positioned in the pressure barrel is provided with a data acquisition board through a fixed support (6), and the temperature-measured pressure sensor is inserted on the data acquisition board.

7. The temperature and pressure sensor detection system for a gas meter according to claim 6, characterized in that: the barrel cover (5) comprises a cover body (51), mounting lugs (52) matched with the pressure barrel are symmetrically arranged at two ends of the cover body, and three pipe fitting mounting holes (53), three positioning holes (54) for mounting the fixing bracket (6) and an exhaust hole (55) for mounting an exhaust valve are uniformly distributed in the middle of the cover body; an air inlet branch pipe, an air outlet branch pipe and a data line pipe are respectively arranged in the three pipe fitting mounting holes, the air inlet branch pipe of the first pressure barrel is connected with the tail end of an air inlet pipeline, the air outlet branch pipe of the last pressure barrel is connected with the head end of an air exhaust pipeline, and the air outlet branch pipe and the air inlet branch pipe are connected in series through a gas pipeline between the adjacent pressure barrels between the first pressure barrel and the last pressure barrel.

8. The temperature and pressure sensor detection system for a gas meter according to claim 7, characterized in that: and the data line of the data acquisition board penetrates through the data line pipe and then extends out of the data line pipe through the high-low temperature box threading through hole to be connected with an upper computer.

Background

At present, the settlement mode of domestic natural gas is mostly volume measurement settlement, the production and manufacturing technology of gas meters has accumulated enough experience and technology so far, and the gas volume measurement accuracy under the working condition is very high.

In order to ensure that the gas used by the user is measured fairly and justly, the volume measured under the working condition needs to be converted into the standard condition and then volume settlement is carried out; this conversion uses two related physical quantities, the pipeline pressure and the pipeline gas temperature. The two physical quantities are generally obtained by selecting an integral sensor, namely a temperature and pressure sensor, which is allowed by the accuracy of the gas meter. The gas meter manufacturing enterprise places the temperature and pressure sensor inside the gas meter shell, directly contacts with natural gas, collects data in real time, and converts standard condition volume, thereby ensuring the fairness and justice of metering. In view of the above reasons, a qualified temperature and pressure sensor is necessary for a fair settlement trade behavior, so that a gas meter manufacturing enterprise must ensure the quality and data stability of the temperature and pressure sensor in the production process of a gas meter, and can meet the service life of the gas meter, so as to ensure the objective fairness of gas meter metering.

The traditional detection mode of the temperature and pressure sensor is to use a gas meter integrator to lead out an interface to manufacture a detection tool, but the tool has low efficiency and long lead, and uncertain data can be brought by the bad test environment during high and low temperature tests; in addition, the temperature and pressure sensors are required to be detected one by one, meanwhile, the detection efficiency is required to be ensured, and the productivity is required to be improved.

Disclosure of Invention

The invention aims to provide a temperature and pressure sensor detection system for a gas meter, which can improve the detection efficiency on the basis of ensuring high detection accuracy.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The temperature and pressure sensor detection system for the gas meter comprises a high and low temperature box for providing a test temperature for a test environment and a gas source for providing a test pressure for the test environment, wherein a test device is placed in the high and low temperature box, a pressure barrel with a temperature and pressure sensor arranged therein is installed in the test device, the test device is communicated with the gas source through a gas pipeline penetrating through the high and low temperature box, and the test device is also communicated with the outside through a gas exhaust pipeline penetrating through the high and low temperature box; the signal input end of the testing device is connected with the control panel, and the signal output end of the testing device is connected with the upper computer used for analyzing and displaying the testing data.

The gas source comprises a positive pressure gas source and a negative pressure gas source, the gas pipeline comprises a gas inlet pipeline communicated with the testing device and the positive pressure gas source and a gas extraction pipeline communicated with the testing device and the negative pressure gas source, the gas inlet pipeline positioned outside the high-low temperature box is connected with a positive pressure gas inlet valve in series, and the gas inlet pipeline positioned inside the high-low temperature box is connected with a positive pressure gas supply valve in series; the negative pressure air exhaust valve is connected in series on the air exhaust pipeline positioned outside the high-low temperature box, and the negative pressure air supply valve is connected in series on the air exhaust pipeline positioned inside the high-low temperature box; the air inlet pipeline positioned in the high-low temperature box is communicated with the outside through an exhaust pipeline provided with a negative pressure exhaust valve, and the air exhaust pipeline positioned in the high-low temperature box is communicated with the outside through an exhaust pipeline provided with a positive pressure exhaust valve.

The temperature and pressure sensor detection system for the gas meter is characterized in that a single chip microcomputer, a valve driving circuit, a power supply key, a confirmation key, a positive pressure key and a negative pressure key are arranged on the control panel, the power supply key is connected in series with a wire between a power supply and a testing device, the output ends of the positive pressure key, the confirmation key and the negative pressure key are respectively connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is respectively connected with the controlled ends of a positive pressure air inlet valve, a positive pressure air supply valve, a positive pressure air exhaust valve, a negative pressure air exhaust valve and a negative pressure air.

According to the temperature and pressure sensor detection system for the gas meter, the gas inlet pipeline between the positive pressure gas supply valve and the testing device in the high-low temperature box is connected with the heat exchanger for controlling the temperature of gas in the gas inlet pipeline, and the controlled end of the heat exchanger is connected with the temperature control signal output end of the high-low temperature box.

According to the temperature and pressure sensor detection system for the gas meter, data acquisition and analysis software is arranged in the upper computer, detection data of each test unit in the test device are displayed on a display interface of the upper computer, and the qualified state of the temperature and pressure sensor is expressed through background color conversion of the test units.

The temperature and pressure sensor detection system for the gas meter comprises a tray, wherein a plurality of positioning barrels are fixedly arranged on the top end face of the tray, and pressure barrels are assembled in the positioning barrels; the top of the pressure barrel is provided with a barrel cover, the bottom end face of the barrel cover positioned in the pressure barrel is provided with a data acquisition board through a fixed support, and the temperature-measured pressure sensor is inserted on the data acquisition board.

The barrel cover comprises a cover body, mounting lugs which are assembled with the pressure barrel are symmetrically arranged at two ends of the cover body, and the middle part of the cover body is uniformly provided with three pipe fitting mounting holes, three positioning holes for mounting a fixed support and an exhaust hole for mounting an exhaust valve; an air inlet branch pipe, an air outlet branch pipe and a data line pipe are respectively arranged in the three pipe fitting mounting holes, the air inlet branch pipe of the first pressure barrel is connected with the tail end of an air inlet pipeline, the air outlet branch pipe of the last pressure barrel is connected with the head end of an air exhaust pipeline, and the air outlet branch pipe and the air inlet branch pipe are connected in series through a gas pipeline between the adjacent pressure barrels between the first pressure barrel and the last pressure barrel.

According to the temperature and pressure sensor detection system for the gas meter, the data wire of the data acquisition board penetrates through the data wire pipe and then extends out of the data wire pipe through the high-low temperature box threading through hole to be connected with the upper computer.

Due to the adoption of the technical scheme, the technical progress of the invention is as follows.

According to the invention, the test device is independently arranged and is placed in the high-low temperature box for performance detection of different environmental temperatures and different pressure points, so that the use environment of the gas meter where the temperature and pressure sensor is located can be truly simulated, and the detection precision is greatly improved; and the testing device adopts a unit type testing mode, can carry out batch detection on the tested devices, and greatly improves the detection efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention;

FIG. 2 is a schematic structural view of the chassis assembly of the present invention;

FIG. 3 is a schematic structural view of the upper tray assembly of the present invention;

fig. 4 is a schematic structural view of the tub cover according to the present invention;

FIG. 5 is a schematic structural view of the fixing bracket according to the present invention;

FIG. 6 is a simplified diagram of the gas circulation path during the testing process of the present invention;

FIG. 7 is a logic diagram of the valve actuation of the apparatus of the present invention;

fig. 8 is a flow chart of data configuration and acquisition of the upper computer according to the present invention.

Wherein: 1. the device comprises a chassis assembly, a bottom tray, a bottom supporting leg, a top tray assembly, a bottom supporting leg assembly, a top tray assembly, a top supporting leg assembly, a positioning barrel assembly, a pressure barrel assembly, a barrel cover assembly, a cover body 51, a mounting lug 52, a pipe fitting mounting hole 53, a positioning hole 54, an exhaust hole 55, a fixing support 6, a support mounting hole 61 and a data acquisition board mounting hole 62;

v1, a positive pressure air inlet valve, V2, a negative pressure air extraction valve, V3., a V4. negative pressure exhaust valve, a V5. negative pressure air supply valve, a V6. positive pressure exhaust valve, an E heat exchanger, a EP. high-low temperature box and G1-G30 pressure barrel numbers.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

A temperature and pressure sensor detection system for a gas meter comprises a high and low temperature box (EP), a gas source, a testing device, a control panel and an upper computer, wherein the testing device is arranged in the high and low temperature box (EP), is communicated with the gas source through a gas pipeline, and is also communicated with the outside through a gas exhaust pipeline penetrating through the high and low temperature box; the signal input end of the testing device is connected with the control panel, and the transmission of the detection data is carried out between the testing device and the upper computer.

The air source is used for providing test air pressure for the test device and comprises a positive pressure air source and a negative pressure air source, and six electric valves V1-V6 are arranged on the air pipeline and the exhaust pipeline. The gas pipeline comprises an air inlet pipeline and an air extraction pipeline, the testing device is communicated with the positive pressure gas source through the air inlet pipeline, the testing device is communicated with the negative pressure gas source through the air extraction pipeline, the air inlet pipeline positioned outside the high-low temperature box is connected with a positive pressure air inlet valve V1 in series, and the air inlet pipeline positioned inside the high-low temperature box is connected with a positive pressure air supply valve V3 in series; a negative pressure air exhaust valve V2 is connected in series on the air exhaust pipeline positioned outside the high-low temperature box, and a negative pressure air supply valve V5 is connected in series on the air exhaust pipeline positioned inside the high-low temperature box; the air inlet pipeline positioned in the high-low temperature box is communicated with the outside through an exhaust pipeline provided with a negative pressure exhaust valve V4, and the air exhaust pipeline positioned in the high-low temperature box is communicated with the outside through an exhaust pipeline provided with a positive pressure exhaust valve V6.

The control panel is used for controlling the testing device to detect the temperature-measured pressure sensor under different working modes. In the invention, a single chip microcomputer, a valve driving circuit, a power supply key, a confirmation key, a positive pressure key and a negative pressure key are arranged on a control panel, the power supply key is connected in series on a lead between a power supply and a testing device, the output ends of the positive pressure key, the confirmation key and the negative pressure key are respectively connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is respectively connected with the controlled ends of a positive pressure air inlet valve V1, a positive pressure air supply valve V3, a positive pressure air exhaust valve V6, a negative pressure air exhaust valve V2, a negative pressure air exhaust valve V4 and a negative pressure air supply valve V5 through the valve driving circuit. The singlechip drives the corresponding electric control valve to act through the valve driving circuit according to the input instruction.

High low temperature box EP provides test temperature for the test environment, when testing arrangement placed high low temperature box, detects the requirement according to the temperature, carries out temperature adjustment to testing arrangement's environment, guarantees that testing arrangement is in invariable temperature range, guarantees measurement accuracy. Four through holes are formed in the high-low temperature box EP and are respectively used for penetrating the air inlet pipeline, the air suction pipeline, the exhaust pipeline and the data line pipeline, and the pipelines and the high-low temperature box are installed through sealing rings, so that the internal environment of the high-low temperature box is isolated from the outside.

Because the gas pipeline connected with the testing device is independently arranged and is independent from the air in the high-low temperature box, in order to ensure that the testing gas in the gas pipeline is consistent with the temperature of the gas in the high-low temperature box and the testing temperature, the high-low temperature box is internally provided with a heat exchanger E which is positioned on the gas inlet pipeline between the positive pressure gas supply valve V3 and the testing device and used for controlling the temperature of the gas in the gas inlet pipeline, and the controlled end of the heat exchanger is connected with the temperature control signal output end of the high-low temperature box.

The testing device is used for installing the temperature-measured pressure sensor and detecting the temperature-measured pressure sensor. The testing device mainly comprises a tray, a plurality of positioning barrels are arranged on the tray, and the pressure barrels 4 are assembled in the positioning barrels; the top of the pressure barrel is provided with a barrel cover 5, the bottom end face of the barrel cover positioned in the pressure barrel is provided with a data acquisition board through a fixed support 6, and the temperature measurement pressure sensor is inserted on the data acquisition board. The testing device adopts a structure that the positioning barrel and the pressure barrel are assembled, the pressure barrel is convenient to take and place, the temperature-measured pressure sensor in the pressure barrel is replaced, the safety of the testing device can be guaranteed, and the service life is prolonged.

In this embodiment, the structure of the testing apparatus is shown in fig. 1, and the testing apparatus includes an upper tray assembly 2 and a lower tray assembly 1 which are arranged in parallel, wherein 15 positioning barrels are respectively arranged on the upper tray assembly 2 and the lower tray assembly 1, each positioning barrel is respectively provided with a pressure barrel 4, and each pressure barrel is hermetically provided with a barrel cover 5.

The structure of the chassis assembly 1 is shown in fig. 2, and comprises a bottom tray 11, five bottom legs 12 are arranged at the bottom of the bottom tray, wherein four bottom legs are positioned at four corners of the bottom tray, and one bottom leg is positioned at the center of the bottom tray. The bottom supporting legs are arranged in a square box structure, and the end panels are connected through bolts. The bottom tray is made of an aluminum alloy panel, a plurality of mounting holes are formed in the bottom tray, and bottom supporting legs and the positioning barrel are mounted through bolts so as to ensure that the positioning barrel for placing the pressure barrel cannot fall off from the bottom tray and is convenient to store and take.

The structure of the upper tray assembly 2 is shown in fig. 3, and comprises an upper tray 21, wherein four upper support legs 22 are arranged at the bottom of the upper tray and are positioned at four corners of the upper tray. The upper supporting legs are arranged in a square box structure, and the end panels are connected through bolts. The upper tray is made of an aluminum alloy panel, a plurality of mounting holes are formed in the upper tray, and the upper supporting legs and the positioning barrel are mounted through bolts so as to ensure that the positioning barrel for placing the pressure barrel cannot fall off from the upper tray and is convenient to store and take.

In this embodiment, the height that goes up the landing leg is greater than 1.5 times height of pressure vessel, and firstly for the convenience get put pressure vessel, secondly can make things convenient for fork truck to insert the tray and put down, uses manpower sparingly, convenient operation.

The pressure barrel bears the tasks of a sealed space for temperature and pressure testing and also bears the fixed supporting function of the placement of the temperature and pressure sensor and the data acquisition board. In this embodiment, the pressure barrel is 1L pressure barrel, the inner diameter of the pressure barrel is 102mm, the inner depth is 125mm, the barrel body is 3mm thick, the barrel cover is 12mm thick, the pressure can be borne by 7bar, and each pressure barrel can contain 20 temperature and pressure sensors. After the pressure barrel and the barrel cover are assembled, an independent sealing space is formed, the uniformity of temperature and pressure in the barrel is guaranteed, measuring points can be covered completely, and misjudgment is avoided.

The structure of the barrel cover 5 for sealing the pressure barrel is shown in fig. 4, and comprises a cover body 51, wherein mounting lugs 52 which are assembled with the pressure barrel are symmetrically arranged at two ends of the cover body, and three pipe fitting mounting holes 53, three positioning holes 54 for mounting the fixing support 6 and an exhaust hole 5 for mounting an exhaust valve are uniformly distributed in the middle of the cover body. An air inlet branch pipe, an air outlet branch pipe and a data line pipe are respectively arranged in the three pipe fitting mounting holes, the bottom end of the air inlet branch pipe extends into the bottom of the pressure barrel, and the bottom end of the air outlet branch pipe is flush with the bottom end face of the barrel cover.

In the invention, an air inlet branch pipe of a first pressure barrel is connected with the tail end of an air inlet pipeline, an air outlet branch pipe of a last pressure barrel is connected with the head end of an air extraction pipeline, the air outlet branch pipe and the air inlet branch pipe are connected in series between adjacent pressure barrels between the first pressure barrel and the last pressure barrel through gas pipelines, and 30 pressure barrels, a positive pressure gas source and a negative pressure gas source form a series gas passage, as shown in fig. 6.

The fixed bolster is used for installing the data acquisition board on the bung, conveniently gets to put. The fixing bracket is structurally shown in fig. 5 and comprises an L-shaped bracket, a transverse plate of the L-shaped bracket is provided with a mounting hole, and the mounting hole is fixedly connected with a positioning hole of the barrel cover through a bolt; the vertical plate of the L-shaped support is also provided with a mounting hole for mounting the data acquisition plate through a bolt. When the temperature and pressure measuring sensor needs to be replaced, the temperature and pressure measuring sensor can be replaced only by opening the barrel cover and taking out the barrel cover, and the temperature and pressure measuring sensor is very convenient and fast.

The data acquisition board is provided with a temperature and pressure measuring sensor, a data wire of the data acquisition board penetrates through a data wire pipe of the barrel cover and then extends out through a threading through hole of the high-low temperature box, and the data wire extending out of the high-low temperature box is connected with an upper computer for data transmission. In the invention, each pressure barrel is provided with a data acquisition board, data lines connected with the data acquisition boards are output in a parallel connection mode, each data acquisition board corresponds to each pressure barrel one by one and is used as a communication address with pressure barrel numbers G1-G30, temperature-measured pressure sensors on the data acquisition boards are also respectively numbered, and data transmission is not influenced.

The upper computer is used for analyzing and displaying the test data. Data acquisition and analysis software is arranged in the upper computer, detection data of each test unit of the test device is displayed on a display interface of the upper computer, and the qualified state of the temperature-measured pressure sensor is expressed through background color conversion of the test units.

When the invention is used for detecting the temperature and pressure sensor, the specific flow is as follows.

Firstly, establishing a detection environment: mounting a temperature and pressure sensor to be measured on a data acquisition plate of a pressure barrel cover, screwing a sealing nut with the pressure barrel through a mounting lug, and sealing; and then the measuring device is placed in a high-low temperature box, the gas pipeline and the data line are respectively and correspondingly connected to form a gas passage, and a data transmission link is established.

Secondly, starting an upper computer: after the upper computer is powered on, the Windows system is waited to be stable, the data acquisition and analysis software is automatically run, the operation flow of the data acquisition and analysis software is shown in fig. 8, an operator can select different operation modes to perform targeted testing, for example, after initialization is completed, data needs to be read, a broadcast instruction is issued, and data uploading is waited.

Step three, emptying the test device: the power key is pressed through the operation panel to start the operation, and the corresponding key is selected, and the corresponding action logic between each key and the operation panel is shown in fig. 7.

When the positive pressure test is needed, the positive pressure button is pressed, the positive pressure air inlet valve V1, the positive pressure air supply valve V3 and the positive pressure air exhaust valve V6 are opened at the moment, positive pressure air is automatically introduced, and air evacuation operation in the air pipeline and each pressure barrel is carried out.

The emptying time is determined by the number of pressure barrels, which in this embodiment takes about 10 minutes.

Before the positive pressure gas enters the pressure barrel, the gas needs to be heated according to a set temperature, the heat exchanger and the high-low temperature box are started at the moment, the gas for testing is adjusted to the testing environment temperature, meanwhile, the gas temperature in the high-low temperature box is also adjusted to the testing environment temperature, and after the emptying is finished, the gas temperature in the gas pipeline and the gas temperature in the high-low temperature box are kept consistent.

After the emptying work is finished, a confirmation key is pressed, the positive pressure exhaust valve V6 is closed, a positive pressure test mode is entered, pressure maintaining is carried out, the system sealing is ensured, and pressure data can be read normally.

When the negative pressure test is needed, the negative pressure button is pressed, and at the moment, the electric control valve negative pressure air suction valve V2, the negative pressure air exhaust valve V4 and the negative pressure air supply valve V5 are opened, and the negative pressure mode is started. After the emptying work is finished, a confirmation key is pressed, the negative pressure air supply valve V5 is closed, a negative pressure test mode is entered, pressure maintaining is carried out, the system sealing is ensured, and pressure data can be read normally.

The fourth step, in the testing process, the data acquisition board can transmit detected data and ambient temperature and pressure data for the host computer, the data that the host computer read can be automatic to be preserved as the MES data, but can not direct display on the screen, need pass through data summary more than 6, after carrying out the calculation of measuring repeatability, the screen just begins to show, the information that shows has pressure bucket serial number (this serial number also corresponds the address of inside data acquisition board), reference temperature (unit degree centigrade), the temperature average value of each temperature and pressure sensor that pressure data (unit pascal) and internal test, pressure average value, the measurement repeatability of temperature data and the measurement repeatability of pressure data.

In the actual test data, the repeatability of each kind of measurement data is basically within 0.01%, and the judgment standard is 0.2% and is qualified. The judgment data threshold value is obtained by backward deducing through measurement uncertainty analysis of the gas meter, for example, the accuracy of the gas meter is 1.5 grade, and the threshold value is obtained by backward deducing according to the combination of the error accuracy of the base meter and the uncertainty evaluation of the integrator.

In the detection process of the temperature and pressure sensor, the unqualified product can be found out only by looking at the data background of the serial number data of the temperature and pressure sensor corresponding to the pressure barrel to become orange without staring at all times on the screen of the upper computer. In this embodiment, the normal temperature and pressure sensor of data all is the green background on the host computer screen, in case the test data that discovery received is greater than the threshold value, will adjust the data background of corresponding position for the orange, and the unusual material of discernment that the operating personnel can be very light like this can be taken out the material after the record after the test.

The testing device can be combined and used in batches in the process of testing the temperature and pressure sensor, and because the temperature and pressure sensor needs to detect three data points, namely high temperature, low temperature and normal temperature when the gas meter is used, the pressure corresponding to each temperature point is required to bear more than 200 kPa; therefore, during actual detection, an operator firstly installs the temperature and pressure sensor to be detected on the data acquisition board in each pressure barrel, then screws up the sealing nut to seal, 30 pressure barrels can be placed on each pressure barrel bearing tray, simultaneously installs 90 pressure barrels in 3 sets, and then connects the gas path pipeline and the electric wiring; the three sets of test devices are respectively placed in a high-temperature box, a low-temperature box and a normal-temperature environment, then gas with corresponding pressure is respectively introduced, and the pressure test is finished at three temperature points at the same time. During the first round of test, 1 set of 30 pressure barrels can be installed again by utilizing the time gap; after the first round of test is finished, the test device in the high-low temperature box can be placed in a normal temperature area for normal temperature test; placing the first round of normal temperature testing device into a low temperature box for testing; the newly assembled 1 set of test device is placed in a high-temperature box for high-temperature test, so that the circular test can be completed, the detection time is shortened, and the detection efficiency is improved.