There have been many research results of cable connector temperature monitoring at home and abroad. Divided by signal acquisition methods, there are two types: electrical signal temperature measurement and optical signal temperature measurement; divided by the presence or absence of power, there are two types: active wireless temperature measurement and passive wireless temperature measurement.

There are two types of electrical signal temperature measurement methods: thermocouple temperature measurement and integrated sensor temperature measurement. Optical signal temperature measurement methods mainly include infrared temperature measurement, fiber grating temperature measurement and distributed fiber temperature measurement based on Raman scattering. Active wireless temperature measurement methods mainly include digital temperature sensors, thermal resistors and thermistors. Passive wireless temperature measurement method is an emerging temperature measurement method, which is mainly represented by surface acoustic wave temperature measurement.

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