The Design Of Conduction Interference Source And Receiving Device

Electromagnetic compatibility is the basis of ensuring good equipment performance andpreventing electromagnetic environment deterioration. In underwater acoustic field, there area large number of electronic equipment in sonar equipment working environment, willinevitably produce mutual interference between devices. How to improve the anti interferenceability of sonar equipment to work normally, while reducing the electromagnetic interferencefor other equipment to provide a good working environment, that is to improve the sonarequipment electromagnetic compatibility, has become the focus of attention of the underwateracoustic field.This paper research on the electromagnetic compatibility of equipment, make sonarequipment to make qualitative analysis on the electromagnetic compatibility before being putinto use, design and implementation of a set of conduction interference source andinterference receiving device. This paper introduces the electromagnetic compatibility on thebasis of relevant theory, according to the International Special Committee on RadioInterference standard and the frequency characteristics of underwater acoustic equipment,determine the device function, technical indicators and implementation scheme.After analysis and demonstration, the final design and implementation of the conductedinterference source with Class-AB power amplifier and a self-made conduction caliper;design and implementation of the linear impedance stabilization network with V-LISN; designand implementation of EMI receive and spectrum analysis with analog signal pretreatmentmodule, AD conversion, DSP and computer.Through the test, the design of hardware device meets the design requirements, canrealize the expected function.