Environmental factors bring about many problems to temperature test accuracy and uncertainty in power cabin under environment of strong electromagnetic interference. In order to accurately study on temperature distribution

as far as possible to reduce effects of environmental factors

problem of electromagnetic interference restraining must be solved. According to characteristics of circuit design of temperature measuring system

design electromagnetic interference suppression circuit module

propose a new scheme to restrain electromagnetic interference effectively

it has been applied in practical engineering and had certain practicality

it satisfy high precision temperature measurement in power cabin.