Method for troubleshooting electromagnetic radiation sensitivity fault of electronic product

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...

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 troubleshoot electromagnetic radiation sensitivity. It is impossible to see the sensitive and weak links at a glance, and it is easy to cause confusion when troubleshooting.

Images