Testing device of input and output module

Abstract

The invention provides a testing device for an input and output module. The testing device comprises an upper computer and a plurality of testing modules, the steam turbine operation process model comprises standard operation data of the steam turbine in various operation states; the upper computer is used for outputting a target control signal to the test module so as to control the test module to output a corresponding test signal to the input and output module, so that the input and output module outputs actual operation data; the upper computer is further used for receiving the operation data sent by the input and output module and obtaining a test result based on the actual operation data and the standard operation data. Standard operation data of the steam turbine in various operation states are simulated through the steam turbine operation process model, various function tests of the input and output module in the digital electro-hydraulic control system of the steam turbine are achieved, the requirement for equipment is low, building is easy, the production efficiency of the I / O module in the DEH control system is improved, cost is reduced, product quality is improved, and product quality is improved. And the test accuracy is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of digital electro-hydraulic control systems for steam turbines, and in particular to a testing device for an input and output module. Background Art

[0002] DEH control system (Digital Electric Hydraulic Control System) is an important component of steam turbine generator set in power station. DEH control system is a regulating controller for steam turbine start, stop, normal operation and accident conditions, which is composed of valve servo actuator and EH (Electro-Hydraulic) hydraulic actuator. Valve servo actuator controls the steam intake and speed of steam turbine by controlling the opening of main steam valve and regulating valve of steam turbine; EH hydraulic actuator is used to convert electrical signal into mechanical displacement of oil motor piston, so it is also called electro-hydraulic servo actuator, which is the power source of valve servo actuator. The oil tank, oil pump and oil pipeline ensure the stability of oil supply pressure and flow. DEH control system realizes the control of speed, load, pressure, etc. of steam turbine generator set, so as to realize various functions and uses such as starting in different thermal states, coordinated control of machine and boiler, peak and frequency regulation of power grid, and comprehensive information management. The electronic control task of the DEH control system is to adjust the speed and power of the steam turbine generator set. It mainly controls the steam inlet valve of the steam turbine. In addition, in an emergency, the DEH control system needs to quickly close all steam inlet valves to achieve tripping.

[0003] Compared with the analog control system, the I / O (Input / Output) module of the DEH control system has the given, comprehensive comparison part and PID (Proportion Integral Differential, a control algorithm) calculation part, which are all performed in the digital computer, which improves the degree of automation and the control accuracy. However, for the functions of the I / O module of the DEH control system, the oil motor is generally still required to cooperate with the valve control. When the oil motor moves, it also drives the LVDT (linear differential transformer displacement sensor) to move. Then, the displacement signal of the oil motor is converted into an electrical signal as negative feedback and added to the command signal, and the position of the servo valve is controlled by comparing the deviation. The test of the entire function has high requirements for equipment and complex construction, which affects production efficiency, and there are quality problems caused by human factors. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the functional testing of I / O modules in DEH control systems in the prior art, such as high equipment requirements and complex construction, resulting in low production efficiency, high cost and low quality, and to provide a testing device for input and output modules.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present disclosure provides a test device for an input-output module, wherein the input-output module is arranged in a digital electro-hydraulic control system of a steam turbine, the test device comprises a host computer and a plurality of test modules, wherein the host computer is provided with a steam turbine operation process model, and each of the test modules is respectively electrically connected to the input-output module and respectively communicated with the host computer;

[0007] The steam turbine operation process model includes standard operation data of the steam turbine under various operation states;

[0008] The host computer is used to input a target control signal to the test module to control the test module to output a corresponding test signal to the input-output module, so that the input-output module outputs actual operation data;

[0009] The host computer is also used to receive the actual operation data sent by the input and output module, and obtain a test result based on the actual operation data and the standard operation data.

[0010] Preferably, the host computer is further used to compare the actual operation data with the standard operation data to obtain a comparison result, and obtain the test result based on the comparison result;

[0011] In response to the comparison result indicating that the actual operation data and the standard operation data are consistent, the test result indicating that the test is passed;

[0012] In response to the comparison result indicating that the actual operation data and the standard operation data are inconsistent, the test result indicates that the test fails.

[0013] Preferably, the test device further comprises a type identification module, and the type identification module is respectively communicatively connected with the host computer and the plurality of the test modules;

[0014] The type identification module is used to identify the type of the input and output module;

[0015] The host computer is used to call the corresponding test case based on the type, and output the target control signal based on the test case;

[0016] Among them, different test cases correspond to different test items of the input and output module, and different test items correspond to different control signals.

[0017] Preferably, the test module comprises a displacement channel test module;

[0018] The displacement channel test module includes a control servo motor and a linear differential transformer type displacement sensor which are electrically connected;

[0019] The control servo motor is used to simulate the valve opening control of the oil motor in the digital electro-hydraulic control system of the steam turbine based on the first control signal, and drive the pull rod of the displacement sensor to move;

[0020] The displacement sensor is used to generate a displacement differential pressure signal as the test signal based on the position of the pull rod after movement, and input it into the displacement channel of the input-output module so that the input-output module outputs the corresponding actual operation data.

[0021] Preferably, the test module includes an analog channel test module;

[0022] The analog quantity channel test module comprises an analog quantity input test unit;

[0023] The analog quantity input test unit comprises an electrically connected signal source and a first conditioning board for analog quantity input channel testing;

[0024] The signal source is used to generate a voltage signal or a current signal as the test signal based on the second control signal;

[0025] The first conditioning board is used to output the voltage signal or the current signal to the analog input channel of the input / output module, so that the input / output module outputs the corresponding actual operation data;

[0026] The input-output module is used to calibrate the actual operation data to obtain the calibrated actual operation data;

[0027] The host computer is also used to obtain the test result based on the calibrated actual operation data and the standard operation data;

[0028] and / or,

[0029] The analog quantity channel test module comprises an analog quantity output test unit;

[0030] The analog output test unit includes an electrically connected digital multimeter and a second conditioning board for current channel testing;

[0031] The second conditioning board is used to generate the corresponding test signal based on the third control signal to collect the current value output by the analog output channel of the input-output module and the feedback current signal channel of the proportional-integral-differential regulation signal, and the current value is used as the actual operation data;

[0032] The digital multimeter is used to output the current value to the host computer;

[0033] The input-output module is also used to calibrate the current value to obtain the calibrated current value, and the calibrated current value is used as the actual operation data;

[0034] The host computer is also used to obtain the test result based on the calibrated current value and the standard operation data.

[0035] Preferably, the test module includes a digital channel test module;

[0036] The digital quantity channel test module includes a third conditioning board for digital quantity input and output channel testing;

[0037] The third conditioning board is used to generate a level signal based on the fourth control signal as the test signal, and input it into the digital input channel of the input-output module, so that the input-output module outputs the corresponding actual operation data;

[0038] The third conditioning board is also used to generate the corresponding test signal based on the fifth control signal to receive the contact signal output by the digital output channel of the input-output module, and the contact signal serves as the actual operation data.

[0039] Preferably, the test module further includes a voltage test module;

[0040] The voltage test module includes an electrically connected voltage transmitter and a fourth conditioning board for voltage testing;

[0041] The voltage transmitter is used for inputting a DC voltage signal to the fourth conditioning board as the test signal based on a sixth control signal;

[0042] The fourth conditioning board is used to output the DC voltage signal to the voltage channel of the input-output module, so that the input-output module outputs the corresponding actual operation data.

[0043] Preferably, the test module includes a pulse generating module;

[0044] The pulse generating module is used to input a square wave signal of a set number and a set frequency to the input-output module as the test signal based on the seventh control signal, so that the pulse channel of the input-output module outputs the corresponding actual operation data;

[0045] and / or,

[0046] The test module includes a pulse acquisition module;

[0047] The pulse acquisition module is used to generate a corresponding test signal based on the eighth control signal to acquire the differential pulse signal of the input and output module, and the differential pulse signal is used as the actual operation data.

[0048] Preferably, the type recognition module includes an optical device and a recognition algorithm.

[0049] Preferably, the input-output module includes a rotation speed card and / or a valve position card.

[0050] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present disclosure.

[0051] The positive and progressive effects of this disclosure are:

[0052] The present invention simulates the standard operating data of the steam turbine under various operating conditions through the steam turbine operation process model, realizes various functional tests of the input and output modules in the steam turbine digital electro-hydraulic control system, has low equipment requirements and is simple to build, improves the production efficiency of the I / O modules in the DEH control system, reduces costs, improves product quality, and improves test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a module schematic diagram of a testing device for an input-output module of Embodiment 1 of the present disclosure.

[0054] Figure 2 This is a module schematic diagram of a testing device for an input-output module of Embodiment 2 of the present disclosure.

[0055] Figure 3 This is a specific example diagram of the testing device for the input-output module of Embodiment 2 of the present disclosure. DETAILED DESCRIPTION

[0056] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.

[0057] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0058] In the embodiments of the present disclosure, the collection, storage, use, processing, transmission, provision and disclosure of user personal information involved are in compliance with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0059] Example 1

[0060] This embodiment provides a test device for an input-output module, wherein the input-output module is arranged in a digital electro-hydraulic control system of a steam turbine. Figure 1 As shown, the test device includes a host computer 1 and several test modules 2. The host computer 1 is provided with a steam turbine operation process model 11. Each test module 2 is electrically connected to the input and output modules and is respectively connected to the host computer 1 for communication.

[0061] The steam turbine operation process model 11 includes standard operation data of the steam turbine under various operation states;

[0062] The host computer 1 is used to input a target control signal to the test module 2 to control the test module 2 to output a corresponding test signal to the input-output module, so that the input-output module outputs actual operation data;

[0063] The host computer 1 is also used to receive actual operation data sent by the input and output modules, and obtain test results based on the actual operation data and standard operation data.

[0064] Specifically, the digital electro-hydraulic control system of the steam turbine includes controllers, I / O modules and other equipment. The signals processed by the I / O modules include DI (digital input), DO (digital output), AI (analog input), AO (analog output), SPD (PWM pulse; PWM, Pulse Width Modulation, pulse width modulation), LVDT (linear differential transformer displacement sensor), serial communication and other types of signals. The test of the I / O module in the DEH control system requires multiple signal generators and collectors to jointly detect the PID adjustment algorithm and overspeed protection algorithm.

[0065] The host computer inputs the target control signal to the test module, so that the test module can automatically inject various signals of the I / O module, automatically test, judge the test results and issue a test report. The test signal generated by the test module can be output in the form of an electrical signal. The host computer installs the system test software and the turbine operation process model, communicates data with various devices, such as the test module, realizes the test debugging of the entire test process, records relevant test information, judges the test results of each channel, and generates and saves the test report.

[0066] The steam turbine operation process model simulates the real-time value of the physical state of the steam turbine under operation, i.e., the standard operation data, through the simulated digital steam turbine model. During the closed-loop test, the steam turbine operation process model provides simulated operation data and provides the dynamic data of real closed-loop control to the card in the DEH control system. The test device also includes a signal switching module, which can convert the real-time value of the physical state of the steam turbine operation process model into an electrical signal, and control the real-time communication object of the I / O module in the DEH control system through software - the steam turbine operation process model or the signal conditioning board. That is, the signal switching module is used to distinguish the signal source of the data interaction with the object under test (I / O module).

[0067] During the test, non-closed-loop and closed-loop tests can be selected to provide control and protection functions for the DEH system I / O module in the closed-loop detection of the turbine operation process model.

[0068] In this implementation, the standard operating data of the steam turbine under various operating conditions is simulated through the steam turbine operation process model, and various functional tests of the input and output modules in the steam turbine digital electro-hydraulic control system are realized. It has low equipment requirements and is simple to build, which improves the production efficiency of the I / O modules in the DEH control system, reduces costs, improves product quality, and improves test accuracy.

[0069] Example 2

[0070] This embodiment provides a testing device for an input-output module, which is a further improvement on the first embodiment.

[0071] In an implementable solution, the host computer 1 is also used to compare the actual operation data with the standard operation data to obtain a comparison result, and obtain a test result based on the comparison result;

[0072] In response to the comparison result indicating that the actual operation data and the standard operation data are consistent, the test result indicating that the test is passed;

[0073] In response to the comparison result indicating that the actual operation data and the standard operation data are inconsistent, the test result indicates that the test fails.

[0074] Specifically, a test report will be generated regardless of whether the test result is passed or not. If the test fails, it indicates that the input and output module needs to be repaired or the software needs to be upgraded.

[0075] In this solution, the host computer compares the actual operation data with the standard operation data. When the actual operation data is consistent with the standard operation data, the test passes; when the actual operation data is inconsistent with the standard operation data, the test fails, thereby ensuring the accuracy and reliability of the test results.

[0076] In one feasible solution, Figure 2 As shown, the test device also includes a type identification module 3, which is respectively connected to the host computer 1 and the plurality of test modules 2 for communication;

[0077] The type identification module 3 is used to identify the type and number of the input and output modules;

[0078] The host computer 1 is used to call the corresponding test case based on the type, and output the target control signal based on the test case;

[0079] Among them, different test cases correspond to different test items of the input and output modules, and different test items correspond to different control signals.

[0080] Specifically, after the I / O module is connected to the test device, the type and number of the I / O module are first identified by the type identification module. The I / O module includes two types of DEH cards: speed cards and / or valve position cards. The host computer automatically calls in pre-configured test cases according to the type, executes the test steps in sequence, integrates the test results of all channels, records relevant test information, generates a test report corresponding to the number, and saves it.

[0081] In this solution, the type of input and output module is identified by the type identification module, which ensures the reliable identification of various types of input and output modules, ensures the reliable testing of each channel of the input and output module, and realizes the automated testing of the I / O module of the DEH control system. During the testing process, the test is performed according to the pre-configured test cases without human participation, thus reducing human errors, improving production efficiency and testing accuracy, and reducing production costs.

[0082] In an practicable solution, the test module 2 includes a displacement channel test module 21;

[0083] The displacement channel test module 21 includes an electrically connected control servo motor 211 and a linear differential transformer type displacement sensor 212;

[0084] The control servo motor 211 is used to simulate the valve opening control of the oil motor in the digital electro-hydraulic control system of the steam turbine based on the first control signal, and drives the pull rod of the displacement sensor 212 to move;

[0085] The displacement sensor 212 is used to generate a displacement differential pressure signal as a test signal based on the position of the pull rod after movement, and input it into the displacement channel of the input-output module so that the input-output module outputs corresponding actual operation data.

[0086] Specifically, the host computer sends a control instruction to the control servo motor (valve position opening), controls the servo motor to drive the pull rod of the displacement sensor to move, and the pull rod value of the displacement sensor will be sent to the LVDT channel of the input and output module to make the input and output module output the corresponding actual operating data. The host computer compares the actual operating data with the standard operating data through software to obtain the test results.

[0087] In this solution, the displacement channel test module can be used to automatically control the servo motor valve position test, valve opening channel test, and LVDT channel test.

[0088] In an practicable solution, the test module 2 includes an analog channel test module 22;

[0089] The analog quantity channel test module 22 includes an analog quantity input test unit 221;

[0090] The analog input test unit 221 includes an electrically connected signal source 2211 and a first conditioning board 2212 for analog input channel testing;

[0091] The signal source 2211 is used to generate a voltage signal or a current signal as a test signal based on the second control signal;

[0092] The first conditioning board 2212 is used to output a voltage signal or a current signal to the analog input channel of the input / output module, so that the input / output module outputs corresponding actual operation data;

[0093] The input and output module is used to calibrate the actual operation data to obtain the calibrated actual operation data;

[0094] The host computer 1 is also used to obtain test results based on the calibrated actual operation data and standard operation data.

[0095] The actual operation data can be calibrated by a preset function, such as y=kx+b, where x represents the actual operation data, y represents the actual operation data after calibration, and k and b are constants. The preset function can be adjusted or set according to actual conditions.

[0096] In this solution, the host computer remotely controls the signal source to output a voltage signal or a current signal through the network, and injects it into the AI ​​channel (analog input channel) of the I / O module through the first conditioning board, so that the I / O module outputs actual operation data, ensuring the reliable implementation of the AI ​​channel test.

[0097] In an practicable solution, the analog channel test module 22 includes an analog output test unit 222;

[0098] The analog output test unit 222 includes an electrically connected digital multimeter 2221 and a second conditioning board 2222 for current channel testing;

[0099] The second conditioning board 2222 is used to generate a corresponding test signal based on the third control signal to collect the current value output by the analog output channel of the input and output module and the feedback current signal channel of the proportional integral differential regulation signal, and the current value is used as the actual operation data;

[0100] The digital multimeter 2221 is used to output the current value to the host computer 1;

[0101] The input-output module is also used to calibrate the current value to obtain a calibrated current value, and the calibrated current value is used as actual operation data;

[0102] The host computer 1 is also used to obtain a test result based on the calibrated current value and the standard operation data.

[0103] In this solution, the second conditioning board sends the current values ​​output by the AO channel (analog output channel) and SAO (feedback current signal of the PID control signal) channel of the module to be tested to the digital multimeter, and the digital multimeter remotely transmits the current values ​​to the host computer through the network, ensuring the reliable implementation of the AO channel test.

[0104] In an practicable solution, the test module 2 includes a digital channel test module 23;

[0105] The digital channel test module 23 includes a third conditioning board 231 for digital input and output channel testing;

[0106] The third conditioning board 231 is used to generate a level signal based on the fourth control signal as a test signal, and input it to the digital input channel of the input-output module, so that the input-output module outputs corresponding actual operation data;

[0107] The third conditioning board 231 is further used to generate a corresponding test signal based on the fifth control signal to receive a contact signal output by a digital output channel of the input / output module, and the contact signal is used as actual operation data.

[0108] In this solution, the host computer controls the third conditioning board to send high and low level signals to the DI channel (digital input channel) of the I / O module, so that the I / O module outputs the corresponding actual operation data; the third conditioning board receives the contact signal sent by the DO channel (digital output channel) of the I / O module, ensuring the reliable implementation of the DI channel test and the DO channel test.

[0109] In an practicable solution, the test module 2 further includes a voltage test module 24;

[0110] The voltage test module 24 includes an electrically connected voltage transmitter 241 and a fourth conditioning board 242 for voltage testing;

[0111] The voltage transmitter 241 is used to input a DC voltage signal as a test signal to the fourth conditioning board 242 based on the sixth control signal;

[0112] The fourth conditioning board 242 is used to output a DC voltage signal to a voltage channel of the input-output module, so that the input-output module outputs corresponding actual operation data.

[0113] Specifically, the direct current voltage signal may be a 24 / 48VDC (Direct Current Voltage) voltage signal, which may be adjusted according to actual conditions.

[0114] In this solution, the voltage transmitter transmits a DC voltage signal to the voltage channel of the I / O module through the fourth conditioning board, so that the input / output module outputs the corresponding actual operation data, ensuring the reliable conduct of the voltage channel test.

[0115] In an operative solution, the testing module 2 includes a pulse generating module 25;

[0116] The pulse generating module 25 is used to input a square wave signal of a set number and a set frequency to the input-output module as a test signal based on the seventh control signal, so that the pulse channel of the input-output module outputs corresponding actual operation data;

[0117] Specifically, the test signal may be a set number of 5V square wave signals of a specific frequency within the range of 1-15 kHz, and the number may be set by a host computer.

[0118] The test module 2 includes a pulse acquisition module 26;

[0119] The pulse acquisition module 26 is used to generate a corresponding test signal based on the eighth control signal to acquire the differential pulse signal of the input and output module, and the differential pulse signal is used as the actual operation data.

[0120] In this solution, a square wave signal of a set number and frequency is input to the input-output module through the pulse generation module, and the differential pulse signal of the input-output module is collected through the pulse collection module, thereby ensuring the reliable implementation of the SPD channel test of the input-output module.

[0121] In one practicable solution, the type recognition module 3 includes an optical device and a recognition algorithm.

[0122] Specifically, the optical device can be a camera, a webcam, a barcode scanner, etc., which is equipped according to the identification on the I / O module.

[0123] In this solution, optical devices such as cameras, webcams, and barcode scanners are used to adopt recognition algorithms to read the identification information on the module through photography, video recording, QR code scanning, etc., which improves the convenience and reliability of I / O module type identification.

[0124] In addition, the testing device also includes an indicator light status testing module 4, which may specifically include an optical device such as a camera or a camera. The indicator light status testing module is used for indicator light status testing, which is coordinated with the channel test to identify the on and off status of the indicator light during the channel test.

[0125] Figure 2 In the figure, the signal source 2211 and the first conditioning board 2212, the digital multimeter 2221 and the second conditioning board 2222, the voltage transmitter 241 and the fourth conditioning board 242, the control servo motor 211 and the displacement sensor 212, the first conditioning board 2212 and the input-output module, the second conditioning board 2222 and the input-output module, the third conditioning board 231 and the input-output module, the fourth conditioning board 242 and the input-output module, the pulse generating module 25 and the input-output module, the pulse acquisition module 26 and the input-output module, and the displacement sensor 212 and the input-output module are all connected by hard wiring.

[0126] The test device also includes a network switch and a serial port gateway. The second conditioning board 2222 and the serial port gateway, and the voltage transmitter 241 and the serial port gateway are connected using RS485.

[0127] The host computer 1 and the network switch, the serial port gateway and the network switch, the type identification module 3 and the network switch, the indicator light status test module 4 and the network switch, the signal source 2211 and the network switch, the first conditioning board 2212 and the network switch, the digital multimeter 2221 and the network switch, the fourth conditioning board 242 and the network switch, the third conditioning board 231 and the network switch, the pulse generation module 25 and the network switch, the pulse acquisition module 26 and the network switch, and the control servo motor 211 and the network switch are all connected by network cables.

[0128] The test device of the input and output module can be designed as a miniaturized and movable device, which improves the convenience of the test device in testing. Figure 3 As shown, it is a specific example diagram of a testing device for an input-output module. The testing device is connected to various interfaces of the input-output module through various windows to implement functional testing of the input-output module.

[0129] The test device of the input-output module includes several test modules, and different test modules respectively output corresponding test signals and input them into different channels of the input-output module to trigger the input-output module to generate actual operation data under different test signals. The specific form and value of the actual operation data generated by the input-output module are determined according to the function of the input-output module itself, and will not be repeated here.

[0130] In this embodiment, the standard operating data of the steam turbine under various operating conditions is simulated through the steam turbine operation process model, so as to realize various functional tests of the input and output modules in the steam turbine digital electro-hydraulic control system. It has low requirements on equipment and is simple to set up, thereby improving the production efficiency of the I / O modules in the DEH control system, reducing costs, improving product quality, and improving test accuracy.

[0131] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.

Claims

1. A testing device for an input / output module, characterized in that: The input-output module is arranged in the digital electro-hydraulic control system of the steam turbine, the test device comprises a host computer and a plurality of test modules, the host computer is provided with a steam turbine operation process model, each of the test modules is electrically connected to the input-output module and is respectively connected to the host computer for communication; The steam turbine operation process model includes standard operation data of the steam turbine under various operation states; The host computer is used to output a target control signal to the test module to control the test module to output a corresponding test signal to the input-output module, so that the input-output module outputs actual operation data; The host computer is also used to receive the actual operation data sent by the input and output module, and obtain a test result based on the actual operation data and the standard operation data.

2. The test device for an input-output module according to claim 1, characterized in that: The host computer is also used to compare the actual operation data with the standard operation data to obtain a comparison result, and obtain the test result based on the comparison result; In response to the comparison result indicating that the actual operation data and the standard operation data are consistent, the test result indicating that the test is passed; In response to the comparison result indicating that the actual operation data and the standard operation data are inconsistent, the test result indicates that the test fails.

3. The test device for an input-output module according to claim 1, characterized in that: The test device further comprises a type identification module, which is respectively connected to the host computer and the plurality of test modules for communication; The type identification module is used to identify the type of the input and output module; The host computer is used to call the corresponding test case based on the type, and output the target control signal based on the test case; Among them, different test cases correspond to different test items of the input and output module, and different test items correspond to different control signals.

4. The test device for an input-output module according to claim 1, characterized in that: The test module includes a displacement channel test module; The displacement channel test module includes a control servo motor and a linear differential transformer type displacement sensor which are electrically connected; The control servo motor is used to simulate the valve opening control of the oil motor in the digital electro-hydraulic control system of the steam turbine based on the first control signal, and drive the pull rod of the displacement sensor to move; The displacement sensor is used to generate a displacement differential pressure signal as the test signal based on the position of the pull rod after movement, and input it into the displacement channel of the input-output module so that the input-output module outputs the corresponding actual operation data.

5. The test device for an input-output module according to claim 1, characterized in that: The test module includes an analog channel test module; The analog quantity channel test module comprises an analog quantity input test unit; The analog quantity input test unit comprises an electrically connected signal source and a first conditioning board for analog quantity input channel testing; The signal source is used to generate a voltage signal or a current signal as the test signal based on the second control signal; The first conditioning board is used to output the voltage signal or the current signal to the analog input channel of the input / output module, so that the input / output module outputs the corresponding actual operation data; The input-output module is used to calibrate the actual operation data to obtain the calibrated actual operation data; The host computer is also used to obtain the test result based on the calibrated actual operation data and the standard operation data; and / or, The analog quantity channel test module comprises an analog quantity output test unit; The analog output test unit includes an electrically connected digital multimeter and a second conditioning board for current channel testing; The second conditioning board is used to generate the corresponding test signal based on the third control signal to collect the current value output by the analog output channel of the input-output module and the feedback current signal channel of the proportional-integral-differential regulation signal, and the current value is used as the actual operation data; The digital multimeter is used to output the current value to the host computer; The input-output module is also used to calibrate the current value to obtain the calibrated current value, and the calibrated current value is used as the actual operation data; The host computer is also used to obtain the test result based on the calibrated current value and the standard operation data.

6. The test device for an input-output module according to claim 1, characterized in that: The test module includes a digital channel test module; The digital quantity channel test module includes a third conditioning board for digital quantity input and output channel testing; The third conditioning board is used to generate a level signal based on the fourth control signal as the test signal, and input it into the digital input channel of the input-output module, so that the input-output module outputs the corresponding actual operation data; The third conditioning board is also used to generate the corresponding test signal based on the fifth control signal to receive the contact signal output by the digital output channel of the input-output module, and the contact signal serves as the actual operation data.

7. The test device for an input-output module according to claim 1, characterized in that: The test module also includes a voltage test module; The voltage test module includes an electrically connected voltage transmitter and a fourth conditioning board for voltage testing; The voltage transmitter is used for inputting a DC voltage signal to the fourth conditioning board as the test signal based on a sixth control signal; The fourth conditioning board is used to output the DC voltage signal to the voltage channel of the input-output module, so that the input-output module outputs the corresponding actual operation data.

8. The test device for an input-output module according to claim 1, characterized in that: The test module includes a pulse generating module; The pulse generating module is used to input a square wave signal of a set number and a set frequency to the input-output module as the test signal based on the seventh control signal, so that the pulse channel of the input-output module outputs the corresponding actual operation data; and / or, The test module includes a pulse acquisition module; The pulse acquisition module is used to generate a corresponding test signal based on the eighth control signal to acquire the differential pulse signal of the input and output module, and the differential pulse signal is used as the actual operation data.

9. The test device for an input-output module as claimed in claim 3, characterized in that: The type recognition module includes an optical device and a recognition algorithm.

10. The test device for an input-output module according to any one of claims 1 to 9, characterized in that: The input-output module includes a rotation speed card and / or a valve position card.

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