Method for troubleshooting electromagnetic radiation sensitivity fault of electronic product

An electronic product, electromagnetic radiation technology, applied in the measurement of electricity, measurement of electrical variables, measurement of interference from external sources, etc., can solve the problem of not being able to see sensitive weak links at a glance, easy to cause confusion when troubleshooting, and difficulty in troubleshooting. Solve circuit sensitivity problems, simple and effective troubleshooting, and high diagnostic efficiency

Inactive Publication Date: 2019-08-16
CHENGDU KAITIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of electromagnetic disturbance, the circuit of avionics products is easy to be sensitive. Due to the complexity of the circuit, it is very difficult to trou

Method used

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  • Method for troubleshooting electromagnetic radiation sensitivity fault of electronic product

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Example Embodiment

[0010] see figure 1 . According to the present invention, a shielded test cable 2 is used to connect the universal measuring instrument 1 to the external socket of the electronic product device under test, and the spare pins or temporarily unused pins on the external socket are used to connect the probe wires corresponding to the spare pins 3. On the test point that needs to be probed when the circuit board in the electronic product device under test is connected, electromagnetic radiation interference is applied by the electromagnetic interference transmitter in the laboratory under normal conditions, and the voltage signal or signal waveform of the sensitive circuit of the electronic circuit board under test is probed. , the voltage signal or signal waveform is measured and checked by the external general measuring instrument 1, so as to determine the sensitive point. After finding the sensitive point of the internal circuit of the electronic product device under test, the s...

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Abstract

The invention discloses a method for troubleshooting an electromagnetic radiation sensitivity fault of an electronic product, and aims to provide a fault point troubleshooting method, which is simpleand easy to do, convenient, rapid and high in test and diagnosis efficiency. The method in the invention is realized through the technical scheme as follows: a general measuring instrument is connected onto an external socket of a measured electronic product device through a shielding test cable; spare contact pins or temporarily unused contact pins on the external socket are utilized for being correspondingly connected to a detection conductor wire, and connected onto a test point of a circuit board in the measured electronic product device needing to be detected; in a normal conduction, an electromagnetic interference transmitter applies electromagnetic radiation interference in a laboratory; the voltage signal or the signal waveform of a sensitive circuit of a measured electronic circuit board is detected; an electromagnetic radiation sensitivity point is troubleshot; detection interference waveform is transmitted to the shielding test cable through the detection conductor wire, andintroduced into the general measuring instrument outside the measured electronic product; and interference waveform reflecting the electromagnetic radiation sensitivity point is detected.

Description

technical field [0001] The invention relates to a method for troubleshooting electromagnetic radiation sensitive faults of electronic products, in particular to a method for troubleshooting uncertain electromagnetic radiation sensitive points of avionics products. Background technique [0002] In the prior art, electromagnetic compatibility (EMC) testing includes two parts: electromagnetic disturbance (EMI) and electromagnetic susceptibility (EMS). EMS is also called electromagnetic immunity. Electromagnetic interference (EMI) refers to the phenomenon that electronic equipment (interference source) interferes with other electronic equipment through electromagnetic waves. The more sensitive the device, the more susceptible it is to interference. Electromagnetic susceptibility EMS refers to the sensitivity of equipment to electromagnetic interference. There are two main types of EMI: conducted and radiated. Conducted electromagnetic interference refers to the interference s...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/001
Inventor 吴畏
Owner CHENGDU KAITIAN ELECTRONICS
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