System and method for testing channel resistance value of carrier rocket

Abstract

The invention provides a carrier rocket access resistance test system and method. The test system comprises a lithium battery, a lithium battery management module, a reinforced portable computer and a communication resistance acquisition module. Data processing and control are carried out through the reinforced portable computer; data communication and resistance value testing are carried out through the communication resistance value acquisition module; the lithium battery, the lithium battery management module and the power distribution circuit are used for power distribution and control of the tested equipment; and communication is carried out through a serial port circuit in the communication resistance acquisition module. The test device not only has the access resistance test function of initiating explosive devices, electromagnetic valves and the like, but also can perform power distribution and control on tested equipment on a carrier rocket and test serial port equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace electronic testing equipment, and in particular to a launch vehicle path resistance testing system and method. Background Art

[0002] As space missions become increasingly complex, the testing needs and technical requirements for products on launch vehicles continue to increase. Existing path resistance test equipment has obvious technical defects and cannot meet the multiple needs of modern space testing. Specifically, these defects mainly include: Most existing test equipment only has basic resistance value testing functions and cannot provide power distribution and control signal transmission to the equipment under test, which limits the flexibility and comprehensiveness of the test system. Traditional test equipment has deficiencies in the test function of serial port devices and cannot adapt to the serial port communication requirements widely used in modern aerospace equipment, resulting in limited test coverage. During the testing of key components such as pyrotechnics and solenoid valves, it is necessary to send a signal of a specific voltage (such as a 28V pulse) for protection and deprotection control, but existing equipment often does not have this function, which brings inconvenience to the test work.

[0003] In addition, with the rapid development of aerospace electronic technology, higher requirements are placed on the accuracy, stability and reliability of test equipment. Therefore, developing a new launch vehicle path resistance test system that integrates power distribution, control, resistance test and serial communication functions is of great significance for improving test efficiency and ensuring the smooth progress of aerospace missions.

[0004] Therefore, it is necessary to propose a new technical solution to improve the above technical problems. Summary of the invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a launch vehicle path resistance test system and method.

[0006] A launch vehicle path resistance test system provided by the present invention comprises: a lithium battery, a lithium battery management module, a reinforced portable computer and a communication resistance acquisition module; The reinforced portable computer is used as a core computing and processing functional module, and is used to control and communicate with the lithium battery management module, and display the battery working status; the reinforced portable computer is also used to control and communicate with the communication resistance acquisition module, issue start / stop resistance acquisition instructions, communicate with the outside through a serial port, and is used to receive resistance messages and working messages collected by the module, and at the same time issue power-on / power-off instructions to external devices, collect their messages through the serial port, process and parse the resistance messages and working messages, and display them on the screen. The computer controls the communication resistance acquisition module, outputs 3-channel 28V pulse signals, performs protection and deprotection control of pyrotechnics, and then performs testing through the resistance acquisition function; The lithium battery is installed in the reinforced portable computer case and is used to power the test system; The lithium battery management module is installed in the chassis of the reinforced portable computer and is used for power supply control and charging and discharging of the lithium battery; the reinforced portable computer has a USB interface and a serial port interface; The communication resistance acquisition module includes a power supply circuit, a power distribution command circuit, a serial port interface circuit, a control circuit, a signal conditioning circuit and a channel switching circuit, which are used to complete the communication function with the reinforced portable computer, collect the resistance of the external load, send it to the computer after conversion, supply power to external devices, and communicate with the external serial port.

[0007] Preferably, the lithium battery management module monitors the voltage of the lithium battery cell and the whole, first performs constant voltage charging on the lithium battery during charging, then performs constant current charging, and monitors the voltage during use. The voltage management range of the lithium battery management module is 32V, and the charging current is 5A; the reinforced portable computer is a Zhaoxin kx-6000g processor chip, using the Zhongbid Kirin operating system; the communication resistance acquisition module uses the smqv600 chip, is programmed in the verilog language, and samples the resistance multiple times to take the average value.

[0008] Preferably, the voltage of the lithium battery is 30-32V.

[0009] Preferably, the reinforced portable computer is a computer independently controllable with domestic chips.

[0010] Preferably, the lithium battery management module performs voltage monitoring, temperature monitoring, current control, communication interface and thermal management; The reinforced portable computer comprises a CPU, a memory and a hard disk components of a computer, and is provided with a liquid crystal screen and at least 4 RS422 serial communication interfaces.

[0011] Preferably, the control circuit of the communication resistance value acquisition module is composed of FPGA and peripheral circuits, and is used to receive asynchronous serial port instructions of the reinforced portable computer, perform test channel selection, and obtain AD sampling voltage values.

[0012] Preferably, the communication resistance value acquisition module is provided with a power supply circuit and a power distribution circuit for providing power distribution testing for external devices.

[0013] Preferably, the communication resistance value acquisition module has a serial port interface circuit and supports unit testing of multiple serial port devices.

[0014] Preferably, the signal conditioning circuit uses a constant small current method to sample the resistance value, and the accuracy of the test resistance value is 0.01 ohm; The channel switching circuit adopts domestically produced PCB relays for channel switching and driving, and the number of switched test channels is 100.

[0015] The present invention also provides a method for testing the resistance of a launch vehicle path. The method uses the launch vehicle path resistance testing system described above, and the method comprises the following steps: Step S1: Before the test starts, the 30V power supply of the device is supplied to the device under test, and 3-way 28V pulse signals are output to control the protection and release of the explosive device; Step S2: During the test, a low current, high-precision path resistance test is performed with 100 channels switched, achieving a test accuracy of 0.01 ohm; Step S3: Use the device to perform unit testing of multiple serial port devices.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention not only has the functions of the traditional test system, but also adds the test function of the serial port device, so that it can more comprehensively cover various types of equipment in the launch vehicle and ensure the accuracy and reliability of the test results; before the test starts, the system uses the software to supply 30V power to the equipment and outputs 3-way 28V pulse signals for the protection and deprotection control of the pyrotechnics. This design effectively avoids possible unexpected situations during the test and improves the safety of the test process; 2. The present invention integrates a lithium battery and a lithium battery management module, which can be powered independently without an external power supply, thereby simplifying the test process and improving test efficiency; at the same time, the design of the reinforced portable computer case makes the system more portable and convenient for testing in a variety of environments; through the integrated design, the system reduces the number of equipment required for testing and reduces the testing cost; at the same time, the charge and discharge control function of the lithium battery also extends the service life of the equipment, further reducing the cost of long-term testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 This is a composition diagram of the launch vehicle path resistance tester of the present invention; Figure 2 This is a composition diagram of the communication resistance value acquisition module in the present invention. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0019] Embodiment 1: Reference Figure 1 and Figure 2 According to the present invention, a launch vehicle path resistance test system is provided, comprising: a lithium battery, a lithium battery management module, a reinforced portable computer and a communication resistance acquisition module; the reinforced portable computer is used as a core computing and processing functional module, and is used to control and communicate with the lithium battery management module, and display the battery working status; the reinforced portable computer is also used to control and communicate with the communication resistance acquisition module, issue start / stop resistance acquisition instructions, communicate with the outside through a serial port, and is used to receive resistance messages and working messages collected by the module, and at the same time issue power-on / power-off instructions to external devices, collect their messages through the serial port, process and parse the resistance messages and working messages and display them on the screen, and the computer controls the communication resistance acquisition module block, outputs 3-way 28V pulse signals, performs protection and deprotection control of pyrotechnics, and then performs testing through resistance acquisition function; the lithium battery is installed in the reinforced portable computer case to power the test system; the lithium battery management module is installed in the reinforced portable computer case to control the power supply and charge and discharge of the lithium battery; the reinforced portable computer has a USB interface and a serial port interface; the communication resistance acquisition module includes a power supply circuit, a power distribution command circuit, a serial port interface circuit, a control circuit, a signal conditioning circuit and a channel switching circuit, which are used to complete the communication function with the reinforced portable computer, collect the resistance of the external load, send it to the computer after conversion, supply and distribute power to external devices, and communicate with the external serial port.

[0020] The lithium battery management module monitors the voltage of the lithium battery cell and the whole. When charging, the lithium battery is first charged at a constant voltage and then at a constant current. The voltage is monitored during use. The voltage management range of the lithium battery management module is 32V and the charging current is 5A. The reinforced portable computer is a Zhaoxin kx-6000g processor chip and uses the Zhongbi Kirin operating system. The communication resistance acquisition module uses the smqv600 chip and is programmed in the Verilog language to sample the resistance multiple times and take the average value. The voltage of the lithium battery is 30-32V. The reinforced portable computer is a domestic chip self-controllable computer. The lithium battery management module performs voltage monitoring, temperature monitoring, current control, communication interface and thermal management. The reinforced portable computer includes the CPU, memory, and hard disk components of the computer, and has an LCD screen and at least 4 RS422 serial communication interfaces. The control circuit of the communication resistance acquisition module is composed of FPGA and peripheral circuits, which are used to receive asynchronous serial port instructions from the reinforced portable computer, select test channels, and obtain AD sampling voltage values. The communication resistance acquisition module has a power supply circuit and a power distribution circuit, which are used to provide power distribution testing for external devices. The communication resistance acquisition module has a serial port interface circuit, which supports unit testing of multiple serial port devices. The signal conditioning circuit uses a constant small current method to sample the resistance value, and the accuracy of the test resistance value is 0.01 ohm; the channel switching circuit uses domestic PCB relays for channel switching and driving, and the number of switching test channels is 100.

[0021] The present invention also provides a method for testing the resistance of a launch vehicle path. The method uses the launch vehicle path resistance testing system described above, and the method comprises the following steps: Step S1: Before the test starts, the 30V power supply of the device is supplied to the device under test, and 3-way 28V pulse signals are output to control the protection and release of the explosive device; Step S2: During the test, a low current, high-precision path resistance test is performed with 100 channels switched, achieving a test accuracy of 0.01 ohm; Step S3: Use the device to perform unit testing of multiple serial port devices.

[0022] Embodiment 2: In view of the above-mentioned technical defects and needs, the present invention proposes a new type of launch vehicle path resistance testing system, which realizes comprehensive testing and control of the equipment under test by integrating lithium batteries, lithium battery management modules, reinforced portable computers and communication resistance acquisition modules. It has the advantages of high precision, multi-function and easy operation, and can meet various needs in the field of modern aerospace testing.

[0023] The present invention discloses a launch vehicle path resistance test system, which includes a lithium battery, a lithium battery management module, a reinforced portable computer and a communication resistance acquisition module. Data processing and control are performed through the reinforced portable computer; data communication and resistance value testing are performed through the communication resistance acquisition module; power distribution and control of the tested equipment are performed through the lithium battery, the lithium battery management module and the power distribution circuit; and communication is performed through the serial port circuit in the communication resistance acquisition module. The present invention not only has the path resistance test function of pyrotechnics and solenoid valves, but also can distribute power and control the tested equipment on the launch vehicle, and test the serial port equipment.

[0024] A launch vehicle path resistance test system, consisting of a lithium battery, a lithium battery management module, a reinforced portable computer, and a communication resistance acquisition module. The lithium battery is installed in the reinforced portable computer case, and the voltage is about 30-32V; the lithium battery management module is installed in the reinforced portable computer case, and is used for power supply control, charging and discharging and other functions of the lithium battery; the reinforced portable computer is a domestic chip self-controllable computer; it has USB, serial port and other interfaces; the communication resistance acquisition module specifically includes a power supply circuit, a power distribution instruction circuit, a serial port interface circuit, a control circuit, a signal conditioning circuit, and a channel switching circuit. The resistance value accuracy of the test is 0.01 ohm, and the number of switchable test channels is 100. The control circuit is composed of FPGA and its required peripheral circuits.

[0025] A method for testing the resistance of a launch vehicle path comprises the following steps: Step 100: Before the test begins, the software supplies 30V power to the device under test, outputs three 28V pulse signals, and controls the protection and release of the pyrotechnics.

[0026] Step 200: During the test, a low current, high precision path resistance test is performed with 100 channels switched, achieving a test accuracy of 0.01 ohms.

[0027] Step 300: The device may be used to perform unit tests on multiple serial port devices.

[0028] The present invention provides a launch vehicle path resistance test system to achieve the test of 100 resistance values, power-on and serial port control of the tested equipment, and protection and deprotection functions of the tested pyrotechnics and loads. It includes: a lithium battery module: providing a 30V power supply to the tested equipment; a lithium battery management module: performing voltage monitoring, temperature monitoring, current control, communication interface, thermal management and other functions on the lithium battery module; a reinforced portable computer: a computer with a liquid crystal screen, a serial port, a USB and other universal interfaces, and an operating system installed; a communication resistance acquisition module: having a power supply circuit, a power distribution circuit, a serial port circuit, a control circuit, a signal conditioning circuit and a channel switching circuit. The module function is to complete and reinforce the communication function of the portable computer, collect the resistance value of the external load, and send it to the computer after conversion, so as to realize the power supply and distribution function for the external equipment and the external serial port communication function.

[0029] See also Figure 1 The launch vehicle path resistance test system provided by the present invention includes: hardware products and supporting software. The hardware part is composed of a lithium battery module, a lithium battery management module, a reinforced portable computer module, and a communication and resistance acquisition module.

[0030] The lithium battery and lithium battery management module are installed in the reinforced portable computer case and are used to supply power to external devices and control the charging and discharging of the lithium battery; The reinforced portable computer includes components such as a CPU, memory, hard disk, etc. that a computer should have, and must include communication interfaces such as 4-way RS422 serial ports.

[0031] See also Figure 2 , communication resistance acquisition module, used to collect 100 resistance values, with an accuracy of 0.01Ω, with a power distribution circuit, which can be used to test the power distribution of the equipment, and with a serial port circuit, which can be used to test the serial port equipment.

[0032] The control circuit in the communication resistance value acquisition module uses a control unit that is a domestically produced FPGA chip from the 58th Institute of China Electronics Technology Group Corporation.

[0033] The control circuit in the communication resistance value acquisition module receives the asynchronous serial port instruction of the reinforcement machine, performs test channel selection, and obtains the AD sampling voltage value.

[0034] The resistance value acquisition circuit uses a constant small current method to sample the resistance value, and according to the test range, the resistance value test can be performed without signal amplification.

[0035] The channel switching circuit, channel switching and driving adopt domestically produced PCB relays.

[0036] Those skilled in the art may understand this embodiment as a more specific description of Embodiment 1.

[0037] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0038] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A launch vehicle path resistance test system, characterized in that: include: Lithium batteries, lithium battery management modules, reinforced portable computers and communication resistance value acquisition modules; The reinforced portable computer is used as a core computing and processing functional module, and is used to control and communicate with the lithium battery management module, and display the battery working status; the reinforced portable computer is also used to control and communicate with the communication resistance acquisition module, issue start / stop resistance acquisition instructions, communicate with the outside through a serial port, and is used to receive resistance messages and working messages collected by the module, and at the same time issue power-on / power-off instructions to external devices, collect their messages through the serial port, process and parse the resistance messages and working messages, and display them on the screen. The computer controls the communication resistance acquisition module, outputs 3-channel 28V pulse signals, performs protection and deprotection control of pyrotechnics, and then performs testing through the resistance acquisition function; The lithium battery is installed in the reinforced portable computer case and is used to power the test system; The lithium battery management module is installed in the chassis of the reinforced portable computer and is used for power supply control and charging and discharging of the lithium battery; the reinforced portable computer has a USB interface and a serial port interface; The communication resistance acquisition module includes a power supply circuit, a power distribution command circuit, a serial port interface circuit, a control circuit, a signal conditioning circuit and a channel switching circuit, which are used to complete the communication function with the reinforced portable computer, collect the resistance of the external load, send it to the computer after conversion, supply power to external devices, and communicate with the external serial port.

2. The launch vehicle path resistance test system according to claim 1, characterized in that: The lithium battery management module monitors the voltage of the lithium battery cell and the whole. When charging, the lithium battery is first charged at a constant voltage and then at a constant current. The voltage is monitored during use. The voltage management range of the lithium battery management module is 32V and the charging current is 5A. The reinforced portable computer is a Zhaoxin kx-6000g processor chip and uses the Zhongbi Kirin operating system. The communication resistance value acquisition module uses the SMQV600 chip and is programmed using the Verilog language to sample the resistance value multiple times and take the average value.

3. The launch vehicle path resistance test system according to claim 1, characterized in that: The voltage of the lithium battery is 30-32V.

4. The launch vehicle path resistance test system according to claim 1, characterized in that: The reinforced portable computer is an independently controllable computer with domestic chips.

5. The launch vehicle path resistance test system according to claim 1, characterized in that: The lithium battery management module performs voltage monitoring, temperature monitoring, current control, communication interface and thermal management; The reinforced portable computer comprises a CPU, a memory and a hard disk components of a computer, and is provided with a liquid crystal screen and at least 4 RS422 serial communication interfaces.

6. The launch vehicle path resistance test system according to claim 1, characterized in that: The control circuit of the communication resistance value acquisition module is composed of FPGA and peripheral circuits, and is used to receive asynchronous serial port instructions of the reinforced portable computer, perform test channel selection, and obtain AD sampling voltage values.

7. The launch vehicle path resistance test system according to claim 1, characterized in that: The signal conditioning circuit uses a constant small current method to sample the resistance value, and the accuracy of the test resistance value is 0.01 ohm; The channel switching circuit adopts domestically produced PCB relays for channel switching and driving, and the number of switched test channels is 100.

8. A method for testing the resistance of a launch vehicle path, characterized in that: The method uses the launch vehicle path resistance test system according to any one of claims 1 to 7, and the method comprises the following steps: Step S1: Before the test starts, the 30V power supply of the device is supplied to the device under test, and 3-way 28V pulse signals are output to control the protection and release of the explosive device; Step S2: During the test, a low current, high-precision path resistance test is performed with 100 channels switched, achieving a test accuracy of 0.01 ohm; Step S3: Use the device to perform unit testing of multiple serial port devices.

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