An electrically exploding valve testing system and method

Abstract

The application provides an electric explosion valve testing system and method, which comprises an electric explosion valve tester, a communication module and an upper computer. The electric explosion valve tester comprises a channel switching circuit, a conduction resistance measuring circuit, an insulation resistance measuring circuit and a controller. The channel switching circuit is electrically connected with the conduction resistance measuring circuit and the insulation resistance measuring circuit. The conduction resistance measuring circuit and the insulation resistance measuring circuit are connected with the sampling interface of the controller. The upper computer is in communication connection with the controller through the communication module. The controller collects the analog signal values processed by the conduction resistance measuring circuit and the insulation resistance measuring circuit, and controls the start and stop of the channel switching circuit. The application can measure the conduction resistance and the insulation resistance of the electric explosion valve, has the multi-channel measuring capacity, and stores the monitoring data in the remote upper computer.

Description

Technical Field

[0001] This application relates to the field of electrical performance testing technology for aerospace-grade electric explosion valves, and in particular to a testing system and method for electric explosion valves. Background Technology

[0002] Electrically detonating valves are widely used in the aerospace field and mainly consist of a valve body, sealing elements, an electrical detonating tube, a cutter, and a rupture component. Their working principle is generally as follows: applying the rated operating voltage or current to the electrical detonating tube circuit ignites the pyrotechnic material (usually trinitrotoluene) inside the tube. The high-pressure, high-temperature gas generated by the detonation pushes a piston within the valve body along its axial direction. The piston drives the cutter to move synchronously, causing the rupture component to be cut, thus opening or closing the pipeline. In the aerospace field, electrically detonating valves are commonly used for pressurization, pressure replenishment, and venting of propellant tanks. For example, during rocket flight, the pressure inside the propellant tank needs to be maintained at a certain level. The electrically detonating valve is installed on the pipeline between the high-pressure gas cylinder and the tank. When pressure replenishment is needed, the valve is detonated, opening the passage and rapidly injecting high-pressure gas into the tank to ensure a stable engine fuel supply.

[0003] Electrical performance testing is required for electric explosion valves before use and installation. The main tests focus on critical components such as the on-resistance and insulation resistance of the explosion-proof tube to assess whether they meet usage requirements. Currently, testing of electric explosion valves primarily utilizes handheld instruments such as multimeters, insulation resistance testers, and handheld pyrotechnics testers. More complex pyrotechnics and electric explosion testing equipment utilizes virtual instrument technology and modular testing instrument integration to complete measurements.

[0004] Currently, the testing methods or technologies for electric explosion valves mainly suffer from the following shortcomings and defects:

[0005] 1. The shortcomings of using handheld instruments or meters for measurement are as follows:

[0006] (1) Handheld instruments (such as multimeters and insulation resistance testers) are easy to carry and transport, and they are equipped with internal power supplies to avoid interference caused by AC power supply from external instruments. However, the power output of handheld instruments cannot be monitored or acquired, making it difficult to accurately determine the fault range of electric explosion valve products. In addition, the output current of handheld instruments is relatively small, which cannot meet the testing requirements of some electric explosion valve products that require a larger test current.

[0007] (2) The mainstream pyrotechnics testers and handheld instruments on the market have relatively simple functions, only having resistance measurement function, and have a low degree of automation and do not have multi-channel switching function. When facing multiple electric explosion valve measurement scenarios, it is necessary to manually reconnect the test cable, which is complicated and frequent plugging and unplugging may cause additional damage to the aviation plug of the electric explosion valve.

[0008] (3) To ensure measurement accuracy, the test cables supporting the handheld instrument are strictly matched with the instrument, resulting in a relatively short cable length. During use, if the handheld instrument malfunctions, it may cause the electric explosion valve to trigger erroneously, presenting a significant safety hazard.

[0009] 2. The disadvantages of using the tester product for measurement are as follows:

[0010] (1) At present, most initiator tester products for electric explosion valves are developed based on virtual instrument technology, which are mainly PCI / PCIe bus or PXI / PXIe bus devices. The finally integrated equipment is large in volume, inconvenient to carry and transport.

[0011] (2) The modular instruments or data acquisition cards required for the integration of tester products are expensive, and after a failure and damage, the maintenance period is relatively long, which will affect the progress of test and measurement work.

[0012] Therefore, the technical problem that urgently needs to be solved at present is how to provide an electric explosion valve test system and test method. The device can measure the on-resistance and insulation resistance of the electric explosion valve, has multi-channel measurement capability, and stores the monitoring data in a remote host computer. Contents of the Invention

[0013] The purpose of the present application is to provide an electric explosion valve test system and test method. The device can measure the on-resistance and insulation resistance of the electric explosion valve, has multi-channel measurement capability, and stores the monitoring data in a remote host computer.

[0014] To achieve the above purpose, as a first aspect of the present application, the present application provides an electric explosion valve test system. The system includes: an electric explosion valve tester, a communication module and a host computer. The electric explosion valve tester includes: a channel switching circuit, an on-resistance measurement circuit, an insulation resistance measurement circuit and a controller; the channel switching circuit is electrically connected to the on-resistance measurement circuit and the insulation resistance measurement circuit; the on-resistance measurement circuit and the insulation resistance measurement circuit are connected to the sampling interface of the controller; the host computer is communicatively connected to the controller through the communication module; the controller collects the analog signal values processed by the on-resistance measurement circuit and the insulation resistance measurement circuit, and controls the start and stop of the channel switching circuit.

[0015] The electric explosion valve test system as described above, wherein the system further comprises: a simulated electric explosion valve test box, which is used for performing self-test on the on-resistance measurement circuit and the insulation resistance measurement circuit, and performing channel detection on the output port of the aviation plug.

[0016] The electric explosion valve testing system described above includes a channel switching circuit comprising a functional channel switching circuit and an intra-channel loop switching circuit. The functional channel switching circuit is electrically connected to the electric explosion valve under test. The functional channel switching circuit is used to switch the function between the conduction resistance measurement circuit and the insulation resistance measurement circuit. The intra-channel loop switching circuit is used to switch the function between the bridge circuits of each electric explosion valve channel.

[0017] In the electric explosion valve testing system described above, the channel circuit switching circuit includes a relay, which is installed in the measurement channel of each electric explosion valve. After completing the continuity resistance measurement and insulation resistance measurement, the controller controls the relay in each measurement channel to be energized to measure the pin circuit of the electric explosion valve.

[0018] In the electric explosion valve testing system described above, the functional channel switching circuit includes a relay and a multiplexed analog switch chip.

[0019] In the electric explosion valve testing system described above, the on-resistance measurement circuit integrates a constant current source circuit. The current output by the constant current source circuit is lower than the minimum trigger current of the electric explosion valve. When the current output by the constant current source circuit flows through the bridge resistor inside the electric explosion valve, a voltage is generated. This voltage is measured through the analog input terminal of the controller and, after being processed by the host computer, the on-resistance measurement value is obtained.

[0020] In the above-described electric explosion valve testing system, the insulation resistance measuring circuit is a constant voltage source. The electric explosion valve under test is connected in series with a high-precision voltage divider resistor and then connected to the insulation resistance measuring circuit. The controller collects the voltage across the high-precision voltage divider resistor. Based on the resistance value of the high-precision voltage divider resistor and the voltage collected by the controller, the insulation resistance value of the electric explosion valve under test is calculated.

[0021] In the electric explosion valve testing system described above, the terminal voltage of a high-precision voltage divider resistor is connected to an analog input port at the output port of the constant pressure source to monitor the output voltage of the constant pressure source in reverse.

[0022] As a second aspect of this application, this application provides a test method for an electric explosion valve, applied to the aforementioned electric explosion valve test system. The method includes: performing a self-test on the conduction resistance measurement circuit and the insulation resistance measurement circuit using a simulated electric explosion valve test box; if the test is abnormal, stopping the system for inspection; if the test is normal, connecting the electric explosion valve to be tested; and executing the conduction resistance measurement and insulation resistance measurement programs to perform conduction resistance measurement and insulation resistance measurement on the electric explosion valve to be tested.

[0023] In the above-described test method for electric explosion valves, during the measurement of conduction resistance and insulation resistance of the electric explosion valve under test, the corresponding path is selected to be opened or closed based on the resistance value of the electric explosion valve under test through a range selection circuit.

[0024] The beneficial effects achieved by this application are as follows:

[0025] (1) This application uses a simulated electric explosion valve test box to connect to an electric explosion valve tester for self-testing, thereby improving the test accuracy and reliability of the electric explosion valve test system.

[0026] (2) This application can realize the automated measurement of multi-channel electric explosion valves at one time, without the need to manually plug and unplug aviation plugs to switch channels, thus avoiding product damage and personnel safety hazards caused by repeated plugging and unplugging of aviation plugs for testing.

[0027] (3) The electric explosion valve tester of this application is connected to a remote host computer via an Ethernet cable and operated by remote commands. This eliminates the need for operators to measure near the electric explosion valve, thus ensuring personnel safety.

[0028] (4) This application can realize the range selection function based on the resistance value connected in the circuit of the electric explosion valve bridge, thereby achieving higher precision measurement. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a schematic diagram of the structure of an electric explosion valve testing system according to an embodiment of this application.

[0031] Figure 2 This is a circuit diagram showing the connection between the electric explosion valve tester and the electric explosion valve under test according to an embodiment of this application.

[0032] Figure 3 This is a circuit diagram of a simulated electric explosion valve test box according to an embodiment of this application.

[0033] Figure 4 This is a circuit diagram of the in-channel loop switching circuit according to an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the functional channel switching circuit in an embodiment of this application.

[0035] Figure 6 This is a circuit diagram of the on-resistance measurement circuit according to an embodiment of this application.

[0036] Figure 7 This is a circuit schematic diagram illustrating the range selection function implemented in an embodiment of this application.

[0037] Figure 8 This is a flowchart of a test method for an electric explosion valve according to an embodiment of this application.

[0038] Figure reference numerals: 1-Internal loop switching circuit; 2-Insulation resistance measurement circuit; 3-Conduction resistance measurement circuit; 4-Functional channel switching circuit; 5-Controller; 6-Communication module; 7-Host computer; 8-Connection interface; 9-Electric explosion valve under test. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] like Figure 1 and Figure 2 As shown, this application provides an electric explosion valve testing system, which includes: an electric explosion valve tester, a communication module 6, and a host computer 7. The electric explosion valve tester includes: a channel switching circuit, a continuity resistance measurement circuit 3, an insulation resistance measurement circuit 2, and a controller 5. The channel switching circuit is electrically connected to the continuity resistance measurement circuit 3 and the insulation resistance measurement circuit 2. The continuity resistance measurement circuit 3 and the insulation resistance measurement circuit 2 are connected to the sampling interface of the controller 5. The host computer 7 is communicatively connected to the controller 5 through the communication module 6. The controller 5 acquires the analog signal values ​​processed by the continuity resistance measurement circuit 3 and the insulation resistance measurement circuit 2, and controls the start and stop of the channel switching circuit.

[0041] like Figure 1 As shown, the electric explosion valve tester includes a connection interface 8, which can be connected to the electric explosion valve 9 to be tested or to a simulated electric explosion valve test box.

[0042] As a specific embodiment of the present invention, the electric explosion valve testing system also includes a simulated electric explosion valve test box, which is used to perform self-testing on the conduction resistance measurement circuit 3 and the insulation resistance measurement circuit 2, and to perform channel detection on the aviation plug output port of the electric explosion valve 9 under test.

[0043] Specifically, it is necessary to detect the output current value of the constant current source in the on-resistance measurement circuit 3 and the output voltage value of the constant voltage source in the insulation resistance measurement circuit 2.

[0044] like Figure 3The diagram shown is a circuit schematic of a simulated electric explosion valve test box, which is internally composed of high-precision, low-temperature drift aluminum shell resistors.

[0045] Preferably, the external electrical interface of the simulated electric explosion valve test box is consistent with the model of the aviation plug interface of the electric explosion valve 9 under test. Given that the electric explosion valve 9 under test has a dual-bridge resistor structure, the pyrotechnic device can be detonated when a trigger current meeting the requirements is applied to any of the bridge resistor circuits. Based on this, the present invention connects LEDs to each bridge circuit of each test channel of the simulated electric explosion valve test box to allow real-time observation of the operating status of each channel and the circuit switching circuit 1 within the test instrument channel after the equipment is powered on. The high-precision cryogenic aluminum-cased resistors and LEDs in the circuit are connected to the electric explosion valve tester via a KZ038 interface, the model and number of which are matched to the electric explosion valve tester.

[0046] In a specific embodiment of the present invention, when the equipment is in a normal, fault-free operating state, after connecting the simulated electric explosion valve test box, the electric explosion valve tester is connected to the host computer 7, and the measurement software is run to execute the self-test process. During the self-test, the measured values ​​of the continuity resistance and insulation resistance obtained from each channel are compared with the normal values. If abnormal values ​​are found, the fault location can be determined.

[0047] As a specific embodiment of the present invention, the controller 5 is composed of an Arduino Portenta H7 single board. Its main function is to acquire the analog signal value after being processed by the conduction resistance measurement circuit 3 and the insulation resistance measurement circuit 2, and at the same time control the start and stop of the function channel switching circuit 4 and the channel loop switching circuit 1.

[0048] As a specific embodiment of the present invention, the controller 5 has an ETH terminal (i.e., an Ethernet interface) and realizes Ethernet communication with the host computer 7 through an external module, namely the Portenta Breakout Board.

[0049] In a specific embodiment of the present invention, the host computer 7 is connected to the RJ45 interface on the Portenta BreakoutBoard module via an Ethernet cable, and communicates with the Arduino Portenta H7 single-board computer using the TCP / IP protocol, thereby realizing the input and output control of the electric explosion valve testing device. The system collects, analyzes, and subsequently stores the measurement data.

[0050] As a specific embodiment of the present invention, the channel switching circuit includes: a functional channel switching circuit 4 and a channel-internal loop switching circuit 1; the functional channel switching circuit 4 is electrically connected to the electric explosion valve 9 to be tested; the functional channel switching circuit 4 is used to switch the function between the conduction resistance measurement circuit 3 and the insulation resistance measurement circuit 2; the channel-internal loop switching circuit 1 is used to switch the function between each bridge circuit of each electric explosion valve channel.

[0051] As a specific embodiment of the present invention, the channel circuit switching circuit 1 includes a relay, which is installed in the measurement channel of each electric explosion valve; after completing the conduction resistance measurement and insulation resistance measurement, the controller 5 controls the relay in each measurement channel to be energized to measure the pin circuit of the electric explosion valve.

[0052] like Figure 4 The diagram shows the principle of the channel-internal loop switching circuit 1. Preferably, the channel-internal loop switching circuit 1 is composed of an RT424005 PCB relay and a PCF8574 (an I / O expansion chip), with each electro-explosive valve measurement channel having this device built-in. Each bridge circuit (circuit 1, 3, and circuits 2, 4) in each channel of the electro-explosive valve is connected to the normally open contact of the PCB relay. By controlling the on / off state of the PCB relay coil, the connection and disconnection of any bridge circuit in each solenoid valve channel can be controlled. The principle of inter-channel and intra-channel loop switching is as follows: Clock and data commands are output from the I2C protocol port of the Arduino Portenta H7 controller. After the PCF8574 extended I / O receives the command, the control output holding register latches the received command output to pins P0-P7 of the PCF8574. Through the external pull-up circuit, the RT424005 PCB relay coil in each bridge circuit is energized, thereby achieving control over the on / off state of each bridge circuit.

[0053] like Figure 5 The diagram shows the schematic of the function channel switching circuit. The function channel switching circuit is electrically connected to the on-resistance measurement circuit and the insulation resistance measurement circuit.

[0054] In a specific embodiment of the present invention, the function channel switching circuit 4 includes a relay and a multiplexed analog switch chip. Preferably, the function channel switching circuit 4 is composed of an RT424005PCD relay and an ANOVA ADG508A multiplexed analog switch chip. It controls the conduction of the on-resistance measurement circuit 3 and the insulation resistance measurement circuit 2 via the Arduino Portenta H7GPIO port, connecting the voltage values ​​measured by the two functional circuits (on-resistance measurement circuit 3 and insulation resistance measurement circuit 2) to the ADC analog input port respectively, thereby completing the measurement function. In a specific embodiment of the present invention, the on-resistance measurement circuit 3 integrates a constant current source circuit. Based on the voltmeter-ammeter method, the on-resistance measurement circuit 3 measures the circuit resistance of the bridge circuit of the electric explosion valve. The current output by the constant current source circuit is lower than the minimum trigger current of the electric explosion valve; when the current output by the constant current source circuit flows through the bridge circuit resistance of the electric explosion valve, a voltage is generated. This voltage is measured through the analog input terminal of the controller 5, and after processing by the host computer, the on-resistance measurement value is obtained.

[0055] like Figure 6 As shown, the on-resistance measurement circuit 3 internally incorporates an LM134 chip. Preferably, the output current of the constant current source circuit is much lower than the minimum trigger current of the electric explosion valve. When the on-resistance measurement circuit 3 is running, the LM134 chip inside the circuit 3 outputs a stable 10mA small current. This current generates a voltage when it flows through the bridge resistor inside the electric explosion valve. This voltage value can be measured through the analog input terminal of the controller 5, and after being processed by the host computer 7, the on-resistance measurement value can be obtained.

[0056] The LM134 chip exhibits temperature-dependent characteristics, with its "V-" terminal output current positively correlated with ambient temperature. Preferably, the on-resistance measurement circuit 3, by adding a diode and resistor to the original standard LM134 circuit configuration, can eliminate the temperature-dependent output characteristic of the LM134 chip. Figure 6 By ensuring that the resistance values ​​of the parallel branches R2+R2A and R1+R1A satisfy the relationship R2=10R1, the temperature effect on the "V+" terminal of the LM134 chip can be eliminated. Adding a forward-biased diode D1 to the "V-" terminal of the LM134 chip can also eliminate the temperature effect on the "V-" terminal.

[0057] Preferably, fault-safe redundancy is added to the circuit. Figure 2As shown in the circuit diagram, the final constant current source output current IOUTPUT is equal to the sum of the current values ​​of the two branches R1+R1A and R2+R2A. When any one of the four branch resistors R1, R1A, R2, and R2A fails, the resistance value of its parallel branch increases, ultimately causing the output current IOUTPUT to decrease, thus preventing the electric explosion valve from detonating due to excessive output current.

[0058] In a specific embodiment of the present invention, the insulation resistance measuring circuit 2 is a constant voltage source. The electric explosion valve 9 to be tested is connected in series with a high-precision voltage divider resistor and then connected to the insulation resistance measuring circuit 2. The controller 5 collects the voltage on both sides of the high-precision voltage divider resistor. Based on the resistance value of the high-precision voltage divider resistor and the voltage collected by the controller 5, the insulation resistance value of the electric explosion valve 9 to be tested is calculated.

[0059] Specifically, within the insulation resistance measurement circuit 2 connected to the electric explosion valve 9 under test, a high-precision voltage divider resistor R is connected in series with the electric explosion valve 9. The voltage Ux across the high-precision voltage divider resistor can be acquired via the analog input port of an Arduino Portenta H7. The insulation resistance value Rx of the electric explosion valve 9 under test can be calculated from the resistance value of the high-precision voltage divider resistor and the voltage division relationship.

[0060] Preferably, the constant voltage source device of this invention is a TI (Texas Instruments) REF 30 series three-terminal voltage reference device. The output reference voltage is 2.5V, and the output accuracy is 0.2%. It possesses good output characteristics, stable linearity, and noise suppression capabilities. Through external circuit matching, it can achieve high-precision voltage output. Furthermore, after connecting a load, it can effectively adjust the impact of voltage drop on the circuit and testing accuracy.

[0061] Preferably, a fault-safe redundancy design is added to the circuit. This invention connects the voltage at the end of a high-precision voltage divider resistor R to the analog input port at the constant voltage source output port, thereby monitoring the constant voltage source output voltage in reverse. When the monitored voltage is abnormal, the function channel switching circuit 4 and the channel-internal loop switching circuit 1 are disconnected, ensuring the safety of the product under test and the measurement personnel.

[0062] Example 2

[0063] This application provides a test method for an electric explosion valve, applied to an electric explosion valve test system. The method includes: performing a self-test on the conduction resistance measurement circuit 3 and the insulation resistance measurement circuit 2 using a simulated electric explosion valve test box; if the test is abnormal, stopping the machine for inspection; if the test is normal, connecting the electric explosion valve to be tested; and executing the conduction resistance measurement and insulation resistance measurement programs to perform conduction resistance measurement and insulation resistance measurement on the electric explosion valve to be tested.

[0064] As a specific embodiment of the present invention, during the measurement of the conduction resistance and insulation resistance of the electric explosion valve under test, the corresponding path is selected to be opened or closed according to the resistance value of the electric explosion valve under test through the range selection circuit.

[0065] As a specific embodiment of the present invention, a test method for an electric explosion valve includes the following steps:

[0066] Connect the device and host computer 7 via Ethernet cable, power on the device, open the measurement software on the host computer 7, and the device will run a self-test program.

[0067] Connect the simulated electric explosion valve test box to the equipment's measurement port and run the program. Check the set standard values ​​and the equipment's measurement data from the simulated electric explosion valve test box. Compare the measured values ​​of conduction resistance and insulation resistance, and simultaneously monitor the output voltage of the constant voltage source and the output current of the constant current source in the circuit. If the difference compared to the standard value exceeds the error requirement, stop the machine for inspection.

[0068] If the data is normal and the equipment is functioning correctly, connect the electric explosion valve and select an appropriate measurement range based on the valve's resistance value. Perform continuity resistance and insulation resistance measurements.

[0069] To achieve higher accuracy in measuring conduction resistance and insulation resistance, this invention incorporates a range selection circuit at the analog measurement port of the device.

[0070] like Figure 7 The diagram shows a schematic of the range selection circuit. The range selection circuit uses an ADG708 multiplexer module as the reference voltage device. When different resistance values ​​of the electric explosion valve are connected, the circuit selects the corresponding path for shut-off or open operation according to its resistance range. The resistance value of the connected circuit changes with the number of connected resistors, thus causing the AREF input voltage value to change accordingly. The analog signal acquisition reference voltage also changes accordingly. The range selection function can be achieved based on the resistance values ​​connected in the electric explosion valve bridge circuit, thereby achieving higher precision measurement. Since the analog signal acquisition resolution of the Arduino PortentaH7 is fixed, the minimum resolvable voltage can be adjusted, thus achieving higher precision measurement.

[0071] like Figure 8 As shown, the testing method for an electric explosion valve according to this application includes the following steps:

[0072] Initialize the device;

[0073] Waiting for instructions from the host computer;

[0074] Determine if the host computer has issued an instruction. If yes, proceed to the next step; otherwise, continue waiting for instructions from the host computer.

[0075] Connect the electric explosion valve simulation test box;

[0076] Execute a self-test program to compare the read value with the normal value and determine whether the read value is normal. If it is, proceed to the next step; otherwise, return to wait for instructions from the host computer.

[0077] Connecting electric explosion valve products;

[0078] Execute the procedures for measuring on-resistance and insulation resistance;

[0079] Upload the data from the continuity resistance measurement and insulation resistance measurement to the host computer and store them;

[0080] Complete the test of the electric explosion valve.

[0081] The beneficial effects achieved by this application are as follows:

[0082] (1) This application uses a simulated electric explosion valve test box to connect to an electric explosion valve tester for self-testing, thereby improving the test accuracy and reliability of the electric explosion valve test system.

[0083] (2) This application can realize the automated measurement of multi-channel electric explosion valves at one time, without the need to manually plug and unplug aviation plugs to switch channels, thus avoiding product damage and personnel safety hazards caused by repeated plugging and unplugging of aviation plugs for testing.

[0084] (3) The electric explosion valve tester of this application is connected to a remote host computer via an Ethernet cable and operated by remote commands. This eliminates the need for operators to measure near the electric explosion valve, thus ensuring personnel safety.

[0085] (4) This application can realize the range selection function based on the resistance value connected in the circuit of the electric explosion valve bridge, thereby achieving higher precision measurement.

[0086] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0087] In the description of this application, the word "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0088] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A test system for an electric explosion valve, characterized in that, The system includes: an electric explosion valve tester, a communication module, and a host computer. The electric explosion valve tester includes: a channel switching circuit, a continuity resistance measurement circuit, an insulation resistance measurement circuit, and a controller. The channel switching circuit is electrically connected to the on-resistance measurement circuit and the insulation resistance measurement circuit; The on-resistance measurement circuit and the insulation resistance measurement circuit are connected to the sampling interface of the controller; The host computer communicates with the controller via the communication module. The controller acquires the analog signal values ​​processed by the on-resistance measurement circuit and the insulation resistance measurement circuit, and controls the start and stop of the channel switching circuit. The channel switching circuit includes: a functional channel switching circuit and an intra-channel loop switching circuit; The function channel switching circuit is electrically connected to the electric explosion valve under test; the function channel switching circuit is used to switch the function between the conduction resistance measurement circuit and the insulation resistance measurement circuit. The channel-internal circuit switching circuit is used to switch the functions between the bridge circuits of each electric explosion valve channel; The in-channel loop switching circuit includes a relay. The relay is installed in the measuring channel of each electric explosion valve; After completing the on-resistance and insulation resistance measurements, the controller energizes the relays in each measurement channel to measure the pin circuit of the electric explosion valve. The functional channel switching circuit includes relays and multiplexed analog switch chips.

2. The electric explosion valve testing system according to claim 1, characterized in that, The system also includes: a simulated electric explosion valve test box, The simulated electric explosion valve test box is used to perform self-testing on the conduction resistance measurement circuit and the insulation resistance measurement circuit, as well as channel detection on the aviation plug output port.

3. The electric explosion valve testing system according to claim 1, characterized in that, The on-resistance measurement circuit integrates a constant current source circuit. The current output by the constant current source circuit is lower than the minimum trigger current of the electric explosion valve. The current output from the constant current source circuit generates a voltage when it flows through the internal bridge resistor of the electric explosion valve. This voltage is measured through the analog input terminal of the controller and then processed by the host computer to obtain the on-resistance measurement value.

4. The electric explosion valve testing system according to claim 1, characterized in that, The insulation resistance measuring circuit is a constant voltage source. The electric explosion valve under test is connected in series with a high-precision voltage divider resistor and then connected to the insulation resistance measurement circuit. The controller acquires the voltage across the high-precision voltage divider resistor; The insulation resistance of the electric explosion valve under test is calculated based on the resistance value of the high-precision voltage divider resistor and the voltage collected by the controller.

5. The electric explosion valve testing system according to claim 4, characterized in that, At the output port of the constant voltage source, the terminal voltage of the high-precision voltage divider resistor is connected to the analog input port to monitor the output voltage of the constant voltage source in reverse.

6. A test method for an electric explosion valve, characterized in that, The method, applied to the electric explosion valve testing system according to any one of claims 1-5, comprises: The conduction resistance measurement circuit and the insulation resistance measurement circuit are self-tested using a simulated electric explosion valve test box. If the test is abnormal, the machine is stopped for inspection. If the test is normal, the electric explosion valve to be tested is connected. Perform the continuity resistance measurement and insulation resistance measurement procedures to measure the continuity resistance and insulation resistance of the electric explosion valve under test.

7. The test method for the electric explosion valve according to claim 6, characterized in that, During the measurement of conduction resistance and insulation resistance of the electric explosion valve under test, the corresponding path is opened or closed by means of the range selection circuit based on the resistance value of the electric explosion valve under test.

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