Avionics equipment transmitter fault rapid detection system and detection method

Abstract

The invention belongs to the technical field of avionics detection, and particularly provides a rapid fault detection system and method for an avionics equipment transmitter, and the system comprises an electronic equipment detection system, an auxiliary device, an oscilloscope, a frequency spectrograph, a digital multimeter, a high-voltage probe and a current clamp which are connected through a cable. And a ground wire of the auxiliary device is connected with the avionics equipment. According to the invention, fault detection and positioning of components can be carried out by means of a complete machine to which the transmitter belongs without splitting a product to be tested, particularly, fault components are determined under the condition that the high voltage is applied to the transmitter, after various instructions, excitation signals and power supply troubleshooting confirmation are carried out, various functional loops are detected on line, and a special klystron is designed to replace a load. And finally, one-time fault positioning is realized, so that the fault positioning efficiency of the product is improved, and continuous power-on startup verification is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of avionics detection, and mainly relates to a rapid detection system and method for avionics equipment transmitter fault. Background Art

[0002] After the 20th century, with the widespread application of miniaturized, high-power klystron transmitters in the field of avionics, a variety of products are involved. During the inspection and maintenance of products, the failure rate of transmitters remains high. Transmitters generally include computers, synchronizers, master oscillators, power optimization devices, modulators, high-voltage power supplies, klystrons, and radiating antennas. Later, with the promotion of solid-state devices in China, solid-state transmitters were developed to replace the original klystron transmitters. For the finalized equipment, in scientific research, production, repair, and maintenance, the klystron transmitter has complex electromagnetic signals that are easy to interfere when it is turned on, compact structures that are difficult to disassemble and assemble, and many closed-loop test conditions. The above reasons lead to a long time for fault location of the klystron transmitter, and it is extremely difficult to accurately locate the fault by replacing the equipment once or twice. In addition, it is necessary to disassemble and assemble the various components of the transmitter many times when performing fault detection, which can easily lead to low detection and troubleshooting efficiency. In addition, long-term power-on of the product can easily reduce the product life and cause physical damage to the tester due to high voltage. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an avionics equipment transmitter fault rapid detection system and detection method, which are used to overcome the problems of low troubleshooting efficiency caused by multiple disassembly and assembly of transmitter components in the prior fault detection method, reduced product life span due to long-term power-on, and physical damage to testers caused by multiple high voltage applications.

[0004] In order to solve the above technical problems, the present invention discloses a rapid detection system for avionics equipment transmitter faults, comprising an electronic equipment detection system, an auxiliary device, an oscilloscope, a spectrum analyzer, a digital multimeter, a high-voltage probe and a current clamp, and the above components are connected by cables; the ground wire of the auxiliary device is connected to the avionics equipment, and the five-way signal (cathode, filament, grid positive, grid negative, collector) wires output by the high-voltage power supply are disconnected from the avionics equipment and introduced into the auxiliary device; the auxiliary device simulates a klystron load, so that when the avionics equipment is high voltage and the klystron is not working, the transmitter forms a working loop, and the working performance of the high-voltage power supply is detected; the auxiliary device is provided with a cable adapter socket of the klystron, and various current signals of the klystron can be collected when the klystron is working; when the electronic equipment detection system performs a whole-machine test on the avionics equipment, the signals of various transmitter components are collected to determine the faulty components.

[0005] The output end of the auxiliary device is connected to a high-voltage probe, a digital multimeter and a current clamp, which are used to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage and collector voltage on the auxiliary device. If there are unqualified items, it means that the high-voltage power supply is faulty, and the faulty parts are checked. If all the test items are qualified, it is a klystron fault.

[0006] The ground wire of the auxiliary device is connected to the avionics equipment, so that the cable from the high-voltage power supply to the klystron is disconnected from the product under test and introduced into the auxiliary device. When the klystron is working, the current of the cable is tested with a current clamp. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

[0007] The electronic equipment detection system applies high voltage to the avionics equipment, and uses a high voltage probe and a digital multimeter to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage, and collector voltage on the auxiliary device. If there are unqualified items, it indicates that the high voltage power supply is faulty. The faulty parts are checked. If all the test items are qualified, it is a klystron fault.

[0008] The electronic equipment detection system is an existing avionics equipment testing system.

[0009] The auxiliary device simulates the klystron load and can form a closed loop for the transmitter when the klystron is in an offline state.

[0010] A method for quickly detecting faults of an avionics equipment transmitter comprises the following steps: S1: Use the electronic equipment detection system to test the "secondary power supply" of the avionics equipment and check the working condition of the secondary power supply. If the test is qualified, it means that the transmitter power supply is normal; if the test is unqualified, check the secondary power supply failure; S2: Use the electronic equipment detection system to test the "angle indication execution" project of the avionics equipment to check the working condition of the position marker. If the test is qualified, it means that the radiating antenna is normal; if the test is unqualified, check the position marker failure; S3: Use a digital multimeter to detect the filament voltage of the high-voltage power supply when the avionics equipment is in the "heating" state. If the test voltage is below 6V, it means that the filament circuit of the high-voltage power supply is qualified; if the test fails, check for high-voltage power supply failure; S4: Add "transmitter start command" to the avionics equipment, and use an oscilloscope to detect the XP5-3 / XP20-3 signal and the XP4-2 / XP19-1 signal. If the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the synchronizer is normal, otherwise it means the synchronizer is faulty; if the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the computer is normal, otherwise it means the computer is faulty, and the faulty parts should be checked; S5: Use a spectrum analyzer to detect the f detection signal. It should be below -90dBW before the "power on command" and above -50dBW after the "transmitter on command", indicating that the master oscillator is qualified; otherwise, the test fails, indicating that the master oscillator is faulty, and the faulty part should be checked; S6: Use an oscilloscope to test the XP3-19 "modulation signal" output. If the tested pulse signal is consistent with the set conditions, and the period and pulse width are stable, it means that the modulator is qualified; if the test fails, it means that the modulator is faulty, and the faulty parts should be checked; S7: Use an oscilloscope to test the "power optimization voltage" output of XP3 / X5-9. If the test signal completes the scanning and tracking states respectively, and the signal is smooth without jumps, it means that the power optimization device is qualified; if the test fails, it means that the power optimization device is faulty, and the faulty parts should be checked; S8: Connect the auxiliary device to the product to be tested. The ground wire of the auxiliary device 18 is connected to the ground of the product to be tested. Disconnect the five signal wires (cathode, filament, grid positive, grid negative, collector) output by the high-voltage power supply from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode, filament, grid positive, grid negative, and collector of unit one. Use a high-voltage probe and a digital multimeter DC voltage range to detect the cathode, grid negative, grid positive, and collector voltages on the panel of the auxiliary device, which are P1, P2, P3, and P4 respectively. Then, it can be calculated that the cathode voltage is P1, the grid negative bias voltage is (P2-P1), the grid positive bias voltage is (P3-P1), and the collector voltage is (P4-P1); if the test fails, it means that the high-voltage power supply is faulty, and the faulty parts should be checked; if all the test items are qualified, the klystron is faulty; S9: Connect the auxiliary device to the product to be tested (in series), connect the ground wire of the auxiliary device to the product to be tested, disconnect the four signal wires (cathode, filament, grid, collector) from the high-voltage power supply to the klystron from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode, filament, grid, and collector of unit two; disconnect the four wires of the klystron from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode (speed), filament (speed), grid (speed), and collector (speed) of unit two; use a current clamp to test the current of the four wires. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) It reduces the maintenance difficulty for maintenance personnel, reduces the number of times the product is disassembled and disassembled, and ensures the reliability of the installation and adjustment of complex assembly parts. This detection method can detect 95% of the total product failures.

[0012] (2) Reduce the number of times the transmitter is turned on, improve product reliability, and reduce the loss of power-on life caused by repeated high-voltage testing.

[0013] (3) Since the troubleshooting process does not require repeated disassembly and assembly, it improves work efficiency and reduces working time, achieves higher economic benefits, and ensures the product delivery cycle.

[0014] (4) The original troubleshooting process was changed, which effectively simplified the fault location time of faulty products and improved the accuracy of fault location, shortening the average fault location time by 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the detection method of the present invention.

[0016] Figure 2 The structural frame of the present invention Figure 1 .

[0017] Figure 3 The structural frame of the present invention Figure 2 .

[0018] Figure 4 This is a principle block diagram of the auxiliary device of the present invention. DETAILED DESCRIPTION

[0019] The present invention is described with reference to the accompanying drawings.

[0020] like Figure 1-Figure 4 As shown, a rapid detection system for avionics equipment transmitter faults includes an electronic equipment detection system, an auxiliary device, an oscilloscope, a spectrum analyzer, a digital multimeter, a high-voltage probe and a current clamp, and the above components are connected by cables; The ground wire of the auxiliary device is connected to the avionics equipment, and the five signal wires (cathode, filament, grid positive, grid negative, collector) output by the high-voltage power supply are disconnected from the avionics equipment and introduced into the auxiliary device; The auxiliary device simulates the klystron load, so that when the avionics equipment is high voltage, the klystron does not work under the condition that the transmitter forms a working loop, and detects the working performance of the high voltage power supply; The auxiliary device is provided with a cable adapter socket of the klystron, which can collect various current signals of the klystron when the klystron is working.

[0021] The electronic equipment detection system collects signals from various transmitter components when performing a complete machine test on the avionics equipment to determine the faulty components.

[0022] The output end of the auxiliary device is connected to a high-voltage probe, a digital multimeter and a current clamp, which are used to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage and collector voltage on the auxiliary device. If there are unqualified items, it means that the high-voltage power supply is faulty, and the faulty parts are checked. If all the test items are qualified, it is a klystron fault.

[0023] The ground wire of the auxiliary device is connected to the avionics equipment, so that the cable from the high-voltage power supply to the klystron is disconnected from the product under test and introduced into the auxiliary device. When the klystron is working, the current of the cable is tested with a current clamp. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

[0024] The electronic equipment detection system applies high voltage to the avionics equipment, and uses a high voltage probe and a digital multimeter to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage, and collector voltage on the auxiliary device. If there are unqualified items, it indicates that the high voltage power supply is faulty. The faulty parts are checked. If all the test items are qualified, it is a klystron fault.

[0025] Use the electronic equipment detection system to test the power supply parameters of the avionics equipment and check the power supply working condition. If the test is qualified, it means that the transmitter power supply is normal; if the test fails, check for secondary power supply failure.

[0026] The electronic equipment detection system is an existing avionics equipment testing system.

[0027] The auxiliary device simulates the klystron load and can form a closed loop for the transmitter when the klystron is in an offline state.

[0028] Use the electronic equipment detection system to perform an angle indication parameter test on the avionics equipment to check the working condition of the position marker. If the test is qualified, it means that the radiating antenna is normal; if the test is unqualified, check the position marker for faults; Use the electronic equipment detection system to detect the voltage of the high-voltage power supply filament with a digital multimeter in the "heating" state of the avionics equipment. If the test voltage is qualified, it means that the circuit of the high-voltage power supply filament is qualified; if the test fails, check the high-voltage power supply fault; Use the electronic equipment detection system to add a "power-on command" to the avionics equipment, and use an oscilloscope to detect the power-on response signal output by the computer and synchronizer; if the signal is unqualified, it means that the computer or synchronizer is faulty, and the corresponding faulty parts should be checked; Under the "preparation" condition, use a spectrum analyzer to detect the detection signal output by the master oscillator. If the test is qualified, it means that the master oscillator is qualified; if the test is unqualified, it means that the master oscillator is faulty, and the faulty part should be checked; Under the "preparation" condition, use an oscilloscope to detect the modulated signal output by the modulator. If the test is qualified, it means that the modulator is qualified; if the test is unqualified, it means that the modulator is faulty, and the faulty parts should be checked; Under the "preparation" condition, use an oscilloscope to detect the voltage output signal of the klystron power optimization device. If the test is qualified, it means that the power optimization device is qualified; if the test is unqualified, it means that the power optimization device is faulty and the faulty parts need to be checked.

[0029] A method for quickly detecting faults of an avionics equipment transmitter comprises the following steps: S1: Use the electronic equipment detection system to test the "secondary power supply" of the avionics equipment and check the working condition of the secondary power supply. If the test is qualified, it means that the transmitter power supply is normal; if the test is unqualified, check the secondary power supply failure; S2: Use the electronic equipment detection system to test the "angle indication execution" project of the avionics equipment to check the working condition of the position marker. If the test is qualified, it means that the radiating antenna is normal; if the test is unqualified, check the position marker failure; S3: Use a digital multimeter to detect the filament voltage of the high-voltage power supply when the avionics equipment is in the "heating" state. If the test voltage is below 6V, it means that the filament circuit of the high-voltage power supply is qualified; if the test fails, check for high-voltage power supply failure; S4: Add "transmitter start command" to the avionics equipment, and use an oscilloscope to detect the XP5-3 / XP20-3 signal and the XP4-2 / XP19-1 signal. If the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the synchronizer is normal, otherwise it means the synchronizer is faulty; if the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the computer is normal, otherwise it means the computer is faulty, and the faulty parts should be checked; S5: Use a spectrum analyzer to detect the f detection signal. It should be below -90dBW before the "power on command" and above -50dBW after the "transmitter on command", indicating that the master oscillator is qualified; otherwise, the test fails, indicating that the master oscillator is faulty, and the faulty part should be checked; S6: Use an oscilloscope to test the XP3-19 "modulation signal" output. If the tested pulse signal is consistent with the set conditions, and the period and pulse width are stable, it means that the modulator is qualified; if the test fails, it means that the modulator is faulty, and the faulty parts should be checked; S7: Use an oscilloscope to test the "power optimization voltage" output of XP3 / X5-9. If the test signal completes the scanning and tracking states respectively, and the signal is smooth without jumps, it means that the power optimization device is qualified; if the test fails, it means that the power optimization device is faulty, and the faulty parts should be checked; S8: Connect the auxiliary device to the product to be tested. The ground wire of the auxiliary device is connected to the ground of the product to be tested. Disconnect the five signal wires (cathode, filament, grid positive, grid negative, collector) output by the high-voltage power supply from the product to be tested and introduce them into the auxiliary device. Figure 4The cathode, filament, positive grid, negative grid, and collector of the middle unit are connected. Use a high-voltage probe and a digital multimeter with a DC voltage range to detect the cathode, negative grid, positive grid, and collector voltages on the auxiliary device panel, which are P1, P2, P3, and P4 respectively. Then, the cathode voltage can be calculated to be P1, the negative grid bias voltage is (P2-P1), the positive grid bias voltage is (P3-P1), and the collector voltage is (P4-P1). If the test fails, it means that the high-voltage power supply is faulty, and the faulty parts should be checked. If all the test items are qualified, the klystron is faulty. S9: Connect the auxiliary device to the product to be tested (in series), connect the ground wire of the auxiliary device to the product to be tested, disconnect the four signal wires (cathode, filament, grid, collector) from the high-voltage power supply to the klystron from the product to be tested, and introduce them into the auxiliary device, respectively. Figure 4 The cathode, filament, grid and collector of the middle unit 2 are connected; the four wires of the klystron are disconnected from the product under test and introduced into the auxiliary device, respectively. Figure 4 The cathode (speed), filament (speed), grid (speed), and collector (speed) of the second middle unit are connected; use a current clamp to test the current of the four wires. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

[0030] This method, with the help of the entire transmitter, can detect and locate component faults without disassembling the product to be tested, especially determining the faulty component under high voltage conditions of the transmitter, performing various instructions, excitation signals, and power supply inspections and confirmations, and then detecting each functional circuit online. A special klystron is designed to replace the load, completing the test of the high-voltage power supply's load capacity, and ultimately achieving one-time fault location, improving the efficiency of product fault location, and reducing the need for continuous power-on verification, which reduces the product's power-on life and physical damage to testers.

[0031] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A rapid detection system for transmitter faults of avionics equipment, characterized by: The invention comprises an electronic equipment detection system, an auxiliary device, an oscilloscope, a spectrum analyzer, a digital multimeter, a high-voltage probe and a current clamp, and the above components are connected by cables; the ground wire of the auxiliary device is connected to the avionics equipment, and the five-way signal (cathode, filament, grid positive, grid negative, collector) wires output by the high-voltage power supply are disconnected from the avionics equipment and introduced into the auxiliary device; the auxiliary device simulates the klystron load, so that when the avionics equipment is high voltage and the klystron is not working, the transmitter forms a working circuit, and the working performance of the high-voltage power supply is detected; the auxiliary device is provided with a cable adapter socket of the klystron, and various current signals of the klystron can be collected when the klystron is working; when the electronic equipment detection system performs a whole-machine test on the avionics equipment, the signals of various components of the transmitter are collected to determine the faulty components.

2. The avionics equipment transmitter fault rapid detection system according to claim 1, characterized in that: The output end of the auxiliary device is connected to a high-voltage probe, a digital multimeter and a current clamp, which are used to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage and collector voltage on the auxiliary device. If there are unqualified items, it means that the high-voltage power supply is faulty, and the faulty parts are checked. If all the test items are qualified, it is a klystron fault.

3. The avionics equipment transmitter fault rapid detection system according to claim 1, characterized in that: The ground wire of the auxiliary device is connected to the avionics equipment, so that the cable from the high-voltage power supply to the klystron is disconnected from the product under test and introduced into the auxiliary device. When the klystron is working, the current of the cable is tested with a current clamp. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

4. The avionics equipment transmitter fault rapid detection system according to claim 1, characterized in that: The electronic equipment detection system applies high voltage to the avionics equipment, and uses a high voltage probe and a digital multimeter to detect the cathode voltage, filament voltage, grid positive voltage, grid negative voltage, and collector voltage on the auxiliary device. If there are unqualified items, it indicates that the high voltage power supply is faulty. The faulty parts are checked. If all the test items are qualified, it is a klystron fault.

5. The avionics equipment transmitter fault rapid detection system according to claim 1, characterized in that: The electronic equipment detection system is an existing avionics equipment testing system.

6. The avionics equipment transmitter fault rapid detection system according to claim 1, characterized in that: The auxiliary device simulates the klystron load and can form a closed loop for the transmitter when the klystron is in an offline state.

7. A method for rapid detection of transmitter failure of avionics equipment according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Use the electronic equipment detection system to test the "secondary power supply" item of the avionics equipment to check the working condition of the secondary power supply. If the test is qualified, it means that the transmitter power supply is normal; If the test fails, check for secondary power supply failure; S2: Use the electronic equipment detection system to test the "angle indication execution" project of the avionics equipment to check the working condition of the position marker. If the test is qualified, it means that the radiating antenna is normal; if the test is unqualified, check the position marker failure; S3: Use a digital multimeter to detect the filament voltage of the high-voltage power supply in the "heating" state of the avionics equipment. If the test voltage is below 6V, it means that the filament circuit of the high-voltage power supply is qualified; if the test fails, check the high-voltage power supply for faults; S4: Add "transmitter start command" to the avionics equipment, and use an oscilloscope to detect the XP5-3 / XP20-3 signal and the XP4-2 / XP19-1 signal. If the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the synchronizer is normal, otherwise it means the synchronizer is faulty; if the XP5-3 / XP20-3 signal changes from high level (5V) to low level (0V), it means the computer is normal, otherwise it means the computer is faulty, and the faulty parts should be checked; S5: Use a spectrum analyzer to detect the f detection signal. If it is below -90dBW before the "power-on command" and above -50dBW after the "transmitter-on command", it means the master oscillator is qualified. Otherwise, the test fails, indicating that the master oscillator is faulty. Check the faulty part. S6: Use an oscilloscope to test the XP3-19 "modulation signal" output. If the tested pulse signal is consistent with the set conditions, and the period and pulse width are stable, it means that the modulator is qualified; if the test fails, it means that the modulator is faulty, and the faulty parts should be checked; S7: Use an oscilloscope to test the "power optimization voltage" output of XP3 / X5-9. If the test signal completes the scanning and tracking states respectively, and the signal is smooth without jumps, it means that the power optimization device is qualified; if the test fails, it means that the power optimization device is faulty, and the faulty parts should be checked; S8: Connect the auxiliary device to the product to be tested. The ground wire of the auxiliary device 18 is connected to the ground of the product to be tested. Disconnect the five signal wires (cathode, filament, grid positive, grid negative, collector) output by the high-voltage power supply from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode, filament, grid positive, grid negative, and collector of unit one. Use a high-voltage probe and a digital multimeter DC voltage range to detect the cathode, grid negative, grid positive, and collector voltages on the panel of the auxiliary device, which are P1, P2, P3, and P4 respectively. Then, it can be calculated that the cathode voltage is P1, the grid negative bias voltage is (P2-P1), the grid positive bias voltage is (P3-P1), and the collector voltage is (P4-P1); if the test fails, it means that the high-voltage power supply is faulty, and the faulty parts should be checked; if all the test items are qualified, the klystron is faulty; S9: Connect the auxiliary device to the product to be tested (in series), connect the ground wire of the auxiliary device to the product to be tested, disconnect the four signal wires (cathode, filament, grid, collector) from the high-voltage power supply to the klystron from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode, filament, grid, and collector of unit two; disconnect the four wires of the klystron from the product to be tested, and introduce them into the auxiliary device, respectively connected to the cathode (speed), filament (speed), grid (speed), and collector (speed) of unit two; use a current clamp to test the current of the four wires. If the current is qualified, the klystron is qualified. If the current is unqualified, the klystron is faulty.

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