Multi-range automatic testing device

Abstract

The utility model relates to the technical field of metering calibration, and discloses a multi-range automatic testing device, a first end of each electric proportional valve in the testing device is connected with an air source, and a second end of each electric proportional valve is connected with a first end of a corresponding front-end busbar; the second end of each front-end busbar is connected with the first ends of all the gas source lines; the first end of each rear-end busbar is connected with the second ends of all the gas source lines, and the second end of each rear-end busbar is connected with a tested device. By arranging a plurality of electric proportional valves, a plurality of front-end busbars, a plurality of gas source routes and a plurality of rear-end busbars, a plurality of gas paths are provided for the measurement of the pressure instruments, the air pressure is adjusted by controlling the opening degrees of the electric proportional valves, different air pressures are provided for different gas source routes, and a plurality of pressure instruments with different measuring ranges can be measured at the same time. And the multi-point calibration of the pressure range can be synchronously realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of measurement calibration, specifically relates to a multi-range automatic testing device. BACKGROUND

[0002] Pressure gauges, pressure transmitters, pressure recorders and other pressure instruments need to be pressure calibrated (for example, tested and calibrated) during the factory delivery and later use to ensure that the pressure instruments meet the specified technical indicators.

[0003] A pressure calibration instrument is an instrument for pressure calibration of pressure instruments. The range of a conventional pressure calibration instrument is single, which limits the calibration range of the pressure calibration instrument. For some measurement ranges, unless another pressure controller of the corresponding range is used, the calibration accuracy is affected by the range, which causes the need for multiple pressure calibration instruments of multiple ranges for pressure instrument calibration, which is inconvenient for on-site calibration. SUMMARY

[0004] Therefore, the utility model provides a multi-range automatic testing device to solve the problem of the need for multiple pressure calibration instruments of multiple ranges for pressure instrument calibration.

[0005] The utility model provides a multi-range automatic testing device, the multi-range automatic testing device includes: host computer, a plurality of electric proportional valve, a plurality of front busbar, a plurality of gas source routes, a plurality of rear busbar, the number of electric proportional valve and the number of front busbar, the number of rear busbar is consistent, wherein,

[0006] The first end of each electric proportional valve is connected to a gas source, and the second end of each electric proportional valve is connected to the first end of the corresponding front busbar.

[0007] The second end of each front busbar is connected to the first end of all gas source routes.

[0008] The first end of each rear busbar is connected to the second end of all gas source routes, and the second end of each rear busbar is connected to a measured device.

[0009] The host computer is connected to all electric proportional valves, all gas source routes and all measured devices.

[0010] During calibration, the host computer selects the electric proportional valve and gas source route to be turned on according to the number of measured devices and the upper limit of the range of each measured device, and sends a turn-on instruction to them. The host computer collects pressure data in the gas source route and pressure data of the measured device, and calculates the error of the measured device.

[0011] The utility model provides a kind of multi-range automatic testing device, by setting multiple electrical proportional valve, multiple front busbar, multiple gas source route and multiple rear busbar, multiple gas paths are provided for pressure instrument measurement, the size of air pressure is adjusted by controlling electrical proportional valve opening, different air pressure is provided for different gas source route, several different range pressure instruments can be measured simultaneously, and the verification of pressure range multipoint can be realized synchronously.

[0012] In an alternative embodiment, each of the gas source routes comprises a front electromagnetic valve group, a safety valve, a calibration table and a rear electromagnetic valve group, wherein,

[0013] The front electromagnetic valve group is connected with the safety valve, the calibration table and the rear electromagnetic valve group in sequence.

[0014] In an alternative embodiment, each of the front electromagnetic valve groups comprises a plurality of front electromagnetic valves, wherein,

[0015] The plurality of front electromagnetic valves are connected side by side, and each of the front electromagnetic valves is connected with a front busbar.

[0016] In an alternative embodiment, each of the rear electromagnetic valve groups comprises a plurality of rear electromagnetic valves, wherein,

[0017] The plurality of rear electromagnetic valves are connected side by side, and each of the rear electromagnetic valves is connected with a rear busbar.

[0018] In an alternative embodiment, each of the rear busbars is connected with a plurality of measured devices.

[0019] In an alternative embodiment, the multi-range automatic testing device further comprises a testing device lower computer, an electrical proportional valve driving device, a calibration table acquisition device and an electromagnetic valve driving device, wherein,

[0020] A first end of the testing device lower computer is connected with the upper computer, and a second end of the testing device lower computer is connected with the electrical proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device respectively;

[0021] The testing device lower computer receives an instruction from the upper computer and sends the instruction to the electrical proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device;

[0022] The electrical proportional valve driving device drives corresponding electrical proportional valves to act according to the instruction;

[0023] The electromagnetic valve driving device drives corresponding front electromagnetic valves and rear electromagnetic valves to act according to the instruction.

[0024] The calibration table acquisition device acquires pressure data of the corresponding calibration table according to the instruction and uploads the pressure data to the upper computer.

[0025] In an alternative embodiment, the multi-range automatic testing device further comprises a device-under-test lower computer and a device-under-test acquisition device, wherein,

[0026] The first end of the device-under-test lower computer is connected with the upper computer, and the second end of the device-under-test lower computer is connected with the device-under-test acquisition device.

[0027] The device-under-test lower computer receives the instruction of the upper computer and sends the instruction to the device-under-test acquisition device.

[0028] The device-under-test acquisition device acquires pressure data of the corresponding device-under-test according to the instruction and uploads the pressure data to the upper computer.

[0029] In an alternative embodiment, the multi-range automatic testing device further comprises an air compressor and a gas filter, wherein,

[0030] The first end of the gas filter is connected with the air compressor, and the second end of the gas filter is connected with the first end of all the electric proportional valves. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 A principle block diagram of a specific example of the multi-range automatic testing device in the embodiments of the present application;

[0033] Figure 2 A principle block diagram of another specific example of the multi-range automatic testing device in the embodiments of the present application;

[0034] Figure 3 A principle block diagram of another specific example of the multi-range automatic testing device in the embodiments of the present application;

[0035] Figure 4 A flowchart of the application method of the multi-range automatic testing device in the embodiments of the present application. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements, it can be wireless connection, or it can be wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0040] The present application provides a kind of multi-range automatic testing device, such as Figure 1As shown, it comprises: a host computer, a plurality of electrical proportional valves, a plurality of front bus bars, a plurality of gas source routes, a plurality of rear bus bars, the number of electrical proportional valves and the number of front bus bars, the number of rear bus bars are consistent. Wherein, the first end of each electrical proportional valve is connected to the gas source, and the second end of each electrical proportional valve is connected to the first end of the corresponding front bus bar. The second end of each front bus bar is connected to the first end of all gas source routes. The first end of each rear bus bar is connected to the second end of all gas source routes, and the second end of each rear bus bar is connected to the measured device. The host computer is connected to all electrical proportional valves, all gas source routes and all measured devices. When performing calibration, the host computer needs to send the on command to the electrical proportional valve and the gas source route according to the number of measured devices and the selection of the upper limit of the range of each measured device, and sends the closing command to the electrical proportional valve and the gas source route that does not need to be turned on, so as to open the test circuit. Then the multi-range automatic testing device starts to perform calibration work, controls the pressure device to start to press, adjusts the air pressure in different gas source routes by controlling the opening ratio of different electrical proportional valves, so as to realize the purpose of simultaneously calibrating different range pressure instruments. At the same time, for the same electrical proportional valve, the air pressure is adjusted by controlling the opening ratio of the electrical proportional valve, so as to realize the calibration of the pressure range of the same pressure instrument. The host computer collects the pressure data in the gas source route and the pressure data of the measured device, and calculates whether the measured device is qualified and the corresponding error.

[0041] Specifically, when performing calibration, the calibrator inputs the number of measured devices and the upper limit of the range of each measured device on the host computer. The host computer selects the electrical proportional valve and the gas source route that needs to be turned on according to the number of measured devices and the upper limit of the range of each measured device, and sends the on command to the electrical proportional valve and the gas source route, and sends the closing command to the electrical proportional valve and the gas source route that does not need to be turned on, so as to open the test circuit. Then the multi-range automatic testing device starts to perform calibration work, controls the pressure device to start to press, adjusts the air pressure in different gas source routes by controlling the opening ratio of different electrical proportional valves, so as to realize the purpose of simultaneously calibrating different range pressure instruments. At the same time, for the same electrical proportional valve, the air pressure is adjusted by controlling the opening ratio of the electrical proportional valve, so as to realize the calibration of the pressure range of the same pressure instrument. The host computer collects the pressure data in the gas source route and the pressure data of the measured device, and calculates whether the measured device is qualified and the corresponding error.

[0042] In the embodiment of the utility model, the number of electrical proportional valves, the number of front bus bars and the number of rear bus bars determine that the multi-range automatic testing device can simultaneously measure several pressure instruments of different ranges. The number of gas source routes is set according to the calibration requirement, and the calibration range of each gas source route can be different from each other, or there can be several gas source routes with the same calibration range. For example, Figure 2 As shown, when the number of electrical proportional valves, the number of front bus bars and the number of rear bus bars are all 2, the multi-range automatic testing device can simultaneously measure two pressure instruments of different ranges. In addition, one gas source route with an upper limit of 5Kpa, one gas source route with an upper limit of 70Kpa, one gas source route with an upper limit of 500Kpa and several gas source routes with an upper limit of 200Kpa can be set.

[0043] The utility model provides a kind of multi-range automatic testing device, comprising: host computer, multiple electrical proportional valve, multiple front busbar, multiple gas source route, multiple rear busbar, the number of electrical proportional valve and the number of front busbar, the number of rear busbar is consistent, wherein, the first end of each electrical proportional valve is accessed gas source, the second end of each electrical proportional valve is connected with the first end of its corresponding front busbar;The second end of each front busbar is connected with the first end of all gas source routes;The first end of each rear busbar is connected with the second end of all gas source routes, and the second end of each rear busbar is connected with measured equipment;Host computer is connected with all electrical proportional valve, all gas source routes, all measured equipment.It provides multiple gas paths for pressure instrument measurement by setting multiple electrical proportional valve, multiple front busbar, multiple gas source routes and multiple rear busbar, adjusts gas pressure by controlling electrical proportional valve opening degree, provides different gas pressure for different gas source routes, can measure several different range pressure instruments simultaneously, and can realize the verification of pressure range multipoint position synchronously.

[0044] In an alternative embodiment, as shown in Figure 1 Each gas source route includes front electromagnetic valve group, safety valve, calibration table and rear electromagnetic valve group. The front electromagnetic valve group is connected with the safety valve, the calibration table and the rear electromagnetic valve group in sequence.

[0045] Specifically, the front electromagnetic valve group and the rear electromagnetic valve group are used to control the flow of gas in the route. When the front electromagnetic valve group and the rear electromagnetic valve group are turned on, the gas flows in the route. The safety valve is used to avoid the risk of overpressure of the gas. The calibration table is used as a standard table and as a standard pressure data for comparison with the pressure data of the measured equipment.

[0046] In the embodiment of the utility model, the calibration table in each gas source route is set according to the verification range of the gas source route. The host computer selects a matching calibration table according to the upper limit of the range of the measured equipment, and turns on the gas source route where the calibration table is located. By setting the verification range matched with the measured equipment, the verification accuracy is improved. In addition, the safety level of the safety valve can be determined according to the range of the calibration table, so as to avoid the problem of cost increase or safety failure caused by mismatching of safety level.

[0047] In an alternative embodiment, as shown in Figure 1 Each front electromagnetic valve group includes multiple front electromagnetic valves. The multiple front electromagnetic valves are connected side by side, and each front electromagnetic valve is connected with a front busbar. Each rear electromagnetic valve group includes multiple rear electromagnetic valves. The multiple rear electromagnetic valves are connected side by side, and each rear electromagnetic valve is connected with a rear busbar.

[0048] Specifically, the number of the five components—electric proportional valve, front-end solenoid valve, front-end manifold, rear-end solenoid valve, and rear-end manifold—is the same. For example... Figure 2 As shown, when the number of electro-proportional valves is 2, the number of front-end solenoid valves, front-end manifolds, rear-end solenoid valves, and rear-end manifolds are all 2. In this case, the multi-range automatic testing device can simultaneously calibrate two pressure gauges with different ranges.

[0049] For example, when a 500 kPa pressure gauge 1 is connected to the back-end manifold 1 and a 5 kPa pressure gauge 2 is connected to the back-end manifold 2, the calibration personnel input the number of devices under test and the upper limit of the range of each device under test on the host computer. Based on the upper limit of the range of pressure gauge 1 (500 kPa), the host computer selects and activates the electro-proportional valve 1 and the first gas source route for pressure gauge 1. According to the connection relationship between the electro-proportional valve, the front-end manifold, the front-end solenoid valve, the back-end solenoid valve, and the back-end manifold, the host computer activates the front-end solenoid valve 1 and the back-end solenoid valve 1 in the first gas source route. That is, the calibration gas route corresponding to pressure gauge 1 is: electro-proportional valve 1 → front-end manifold 1 → front-end solenoid valve 1 → safety valve → calibration gauge → back-end solenoid valve 1 → back-end manifold 1. Similarly, based on the upper limit of the pressure gauge 2's range of 5 kPa, the host computer selects to activate the electro-proportional valve 2 and the fourth gas source route for the pressure gauge 2. According to the connection relationship between the electro-proportional valve, the front-end manifold, the front-end solenoid valve, the rear-end solenoid valve, and the rear-end manifold, it activates the front-end solenoid valve 2 and the rear-end solenoid valve 2 in the fourth gas source route. That is, the calibration gas route corresponding to the pressure gauge 2 is electro-proportional valve 2 → front-end manifold 2 → front-end solenoid valve 2 → safety valve → calibration gauge → rear-end solenoid valve 2 → rear-end manifold 2.

[0050] When pressure gauge 1 (5 kPa) is connected to back-end manifold 1 and pressure gauge 2 (500 kPa) is connected to back-end manifold 2, the host computer, based on the upper limit of pressure gauge 1's range (5 kPa), selects to activate the electro-proportional valve 2 and the fourth gas source route for pressure gauge 1. Based on the connection relationships of the electro-proportional valve, front-end manifold, front-end solenoid valve, back-end solenoid valve, and back-end manifold, the host computer activates the front-end solenoid valve 2 and the back-end solenoid valve 1 in the fourth gas source route. That is, the calibration gas route corresponding to pressure gauge 1 is: electro-proportional valve 2 → front-end manifold 2 → front-end solenoid valve 2 → safety valve → calibration gauge → back-end solenoid valve 1 → back-end manifold 1. Similarly, based on the upper limit of the pressure gauge 2's range of 500 kPa, the host computer selects to activate the electro-proportional valve 1 and the first gas source route for the pressure gauge 2. Based on the connection relationship between the electro-proportional valve, the front-end manifold, the front-end solenoid valve, the rear-end solenoid valve, and the rear-end manifold, it activates the front-end solenoid valve 1 and the rear-end solenoid valve 2 in the fourth gas source route. That is, the calibration gas route corresponding to the pressure gauge 2 is electro-proportional valve 1 → front-end manifold 1 → front-end solenoid valve 1 → safety valve → calibration gauge → rear-end solenoid valve 2 → rear-end manifold 2.

[0051] For example, when the 500Kpa pressure gauge 1 and the 500Kpa pressure gauge 2 are connected to the rear bus 1 and the rear bus 2 respectively. According to the upper limit of the range of the pressure gauge 1, 500Kpa, the host computer selects the on-off electric proportional valve 1 and the first gas source route for the pressure gauge 1, and according to the connection relationship of the electric proportional valve, the front bus, the front electromagnetic valve, the rear electromagnetic valve and the rear bus, the front electromagnetic valve 1 and the rear electromagnetic valve 1 in the first gas source route are turned on, that is, the corresponding calibration gas route of the pressure gauge 1 is electric proportional valve 1→front bus 1→front electromagnetic valve 1→safety valve→calibration table→rear electromagnetic valve 1→rear bus 1. Similarly, according to the upper limit of the range of the pressure gauge 2, 500Kpa, the host computer selects the on-off electric proportional valve 1 and the first gas source route for the pressure gauge 2, and according to the connection relationship of the electric proportional valve, the front bus, the front electromagnetic valve, the rear electromagnetic valve and the rear bus, the front electromagnetic valve 2 and the rear electromagnetic valve 2 in the first gas source route are turned on, that is, the corresponding calibration gas route of the pressure gauge 2 is electric proportional valve 1→front bus 1→front electromagnetic valve 2→safety valve→calibration table→rear electromagnetic valve 2→rear bus 2.

[0052] In an optional embodiment, each rear bus is connected to a plurality of measured devices.

[0053] Specifically, each rear bus is provided with a plurality of ports, and each port is connectable to a measured device. The measured devices connected to the same rear bus have the same range. The measured device can be a temperature and pressure recorder.

[0054] In an optional embodiment, as shown in Figure 3 The multi-range automatic testing device further comprises a testing device lower computer, an electric proportional valve driving device, a calibration table acquisition device and an electromagnetic valve driving device. The first end of the testing device lower computer is connected to the upper computer, and the second end of the testing device lower computer is connected to the electric proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device.

[0055] Specifically, the testing device lower computer receives the instruction of the upper computer and sends the instruction to the electric proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device. The electric proportional valve driving device drives the corresponding electric proportional valve to act according to the instruction. The electromagnetic valve driving device drives the corresponding front electromagnetic valve and rear electromagnetic valve to act according to the instruction. The calibration table acquisition device acquires the pressure data of the corresponding calibration table according to the instruction and uploads the pressure data to the upper computer. In the embodiment of the present application, the opening degree of the electric proportional valve is controlled to adjust the air pressure, so as to realize the full-range pressure detection of the temperature and pressure recorder. After the verification is completed, the pressure gauge is corrected by the upper computer, and the pressure table difference at which point in the process from 0 to the upper limit of the range can be accurately analyzed and accurately compensated.

[0056] In an alternative embodiment, as shown in Figure 3 The multi-range automatic testing device further comprises a lower computer of the measured device and a measured device acquisition device.

[0057] Specifically, the lower computer of the measured device receives the instruction of the upper computer and sends the instruction to the measured device acquisition device.

[0058] In an alternative embodiment, the multi-range automatic testing device further comprises an air compressor and a gas filter.

[0059] Specifically, the air source is output by the air compressor, and then purified by the gas filter to remove air impurities and humidity, and then input to the electric proportional valve.

[0060] The utility model provides a kind of application method of multi-range automatic testing device, as shown in Figure 4 It comprises the following steps:

[0061] S11, according to the number of measured devices and the range of each measured device Upper limit of the selection of the electric proportional valve and gas source route that needs to be turned on.

[0062] S12, send the on command to the electric proportional valve and gas source route that needs to be turned on.

[0063] S13, collect the pressure data in gas source route and the pressure data of measured device, and calculate the error of measured device.

[0064] Specifically, when performing the verification, the verifier inputs the number of the measured devices and the upper limit of the range of each measured device on the host computer. The host computer selects the electrical proportional valve and the gas source route that need to be turned on according to the number of the measured devices and the upper limit of the range of each measured device, and sends a turn-on instruction to the electrical proportional valve and the gas source route, and sends a close instruction to the electrical proportional valve and the gas source route that do not need to be turned on, so as to open the test circuit. Then the multi-range automatic testing device starts to perform the verification work, controls the pressure device to start to press, adjusts the pressure in the different gas source routes by controlling the opening proportion of the different electrical proportional valves, and realizes the purpose of verifying the different range pressure instruments at the same time. Meanwhile, for the same electrical proportional valve, the pressure is adjusted by controlling the opening proportion of the electrical proportional valve, so as to realize the verification of the pressure range multi-point of the same pressure instrument. The host computer collects the pressure data in the gas source route and the pressure data of the measured device, and calculates whether the measured device is qualified and the corresponding error.

[0065] The application method of the multi-range automatic testing device provided by the utility model comprises the following steps: selecting the electrical proportional valve and the gas source route that need to be turned on according to the number of the measured devices and the upper limit of the range of each measured device; sending a turn-on instruction to the electrical proportional valve and the gas source route that need to be turned on; collecting the pressure data in the gas source route and the pressure data of the measured device, and calculating the error of the measured device. The pressure is adjusted by controlling the opening degree of the electrical proportional valve, different pressures are provided for different gas source routes, several different range pressure instruments can be measured at the same time, and the verification of the pressure range multi-point can be realized synchronously.

[0066] In an alternative embodiment, the application method further comprises the following steps:

[0067] S14, according to the pressure data in the gas source route and the pressure data of the measured device, performing pressure compensation on the measured device.

[0068] Specifically, after the verification is completed, the pressure instrument is corrected through the host computer, and the pressure meter difference at which point in the process from 0 to the upper limit of the range can be accurately analyzed and accurately compensated.

[0069] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A multi-range automatic test device, characterized by, The multi-range automatic testing device comprises a host computer, a plurality of electric proportional valves, a plurality of front busbars, a plurality of gas source lines, a plurality of rear busbars, the number of the electric proportional valves is consistent with the number of the front busbars and the number of the rear busbars, wherein, The first end of each electric proportional valve is connected to a gas source, and the second end of each electric proportional valve is connected to the first end of the corresponding front busbar. The second end of each front busbar is connected to the first end of all gas source lines. The first end of each rear busbar is connected to the second end of all gas source lines, and the second end of each rear busbar is connected to a device under test. The host computer is connected to all electric proportional valves, all gas source lines and all devices under test.

2. The multiple range automatic test device of claim 1, wherein, Each gas source line comprises a front electromagnetic valve group, a safety valve, a calibration table and a rear electromagnetic valve group, wherein, The front electromagnetic valve group is connected to the safety valve, the calibration table and the rear electromagnetic valve group in sequence.

3. The multiple range automatic test device of claim 2, wherein, Each front electromagnetic valve group comprises a plurality of front electromagnetic valves, wherein, The plurality of front electromagnetic valves are connected side by side, and each front electromagnetic valve is connected to a front busbar.

4. The multiple automatic test device of claim 3, wherein, Each rear electromagnetic valve group comprises a plurality of rear electromagnetic valves, wherein, The plurality of rear electromagnetic valves are connected side by side, and each rear electromagnetic valve is connected to a rear busbar.

5. The multiple automatic test device of claim 4, wherein, Each rear busbar is connected to a plurality of devices under test.

6. The multiple range automatic test device of claim 2, wherein, The multi-range automatic testing device further comprises a testing device lower computer, an electric proportional valve driving device, a calibration table acquisition device and an electromagnetic valve driving device, wherein, The first end of the testing device lower computer is connected to the host computer, and the second end of the testing device lower computer is connected to the electric proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device respectively; The testing device lower computer receives instructions from the host computer and sends the instructions to the electric proportional valve driving device, the calibration table acquisition device and the electromagnetic valve driving device; The electric proportional valve driving device drives the corresponding electric proportional valve to act according to the instructions; The electromagnetic valve driving device drives the corresponding front electromagnetic valve and rear electromagnetic valve to act according to the instructions; The calibration table acquisition device acquires pressure data of the corresponding calibration table according to the instructions and uploads the pressure data to the host computer.

7. The multiple automatic test device of claim 2, wherein, The multi-range automatic testing device further comprises a device under test lower computer and a device under test acquisition device, wherein, The first end of the device under test lower computer is connected to the host computer, and the second end of the device under test lower computer is connected to the device under test acquisition device; The device under test lower computer receives instructions from the host computer and sends the instructions to the device under test acquisition device; The device under test acquisition device acquires pressure data of the corresponding device under test according to the instructions and uploads the pressure data to the host computer.

8. The multiple automatic test device of claim 4, wherein, The multi-range automatic testing device further comprises an air compressor and a gas filter, wherein, The first end of the gas filter is connected to the air compressor, and the second end of the gas filter is connected to the first end of all electric proportional valves.

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