Online temperature measurement system based on passive wireless sound surface wave sensors

Abstract

The invention discloses an online temperature measurement system based on passive wireless sound surface wave sensors. The system comprises a core control module, the passive sound surface wave sensors, a wireless radiofrequency emitting module, a wireless radiofrequency receiving module and a storage display module. The core control module controls the wireless radiofrequency emitting module to generate radiofrequency pulse signals, the signals are emitted through an apparatus antenna, and the passive sound surface wave sensors, after receiving the radiofrequency pulse signals, emit the radio frequency pulse signals comprising inside temperature information of power equipment through sensor antennas. The wireless radiofrequency receiving module receives and modulates the radiofrequency pulse signals to obtain temperature signals, the core control module processes the temperature signals by use of an adaptive filtering algorithm, a result is displayed through a display, and in case of temperature abnormities, an acousto-optic alarm apparatus generates an acousto-optic alarm. Compared to the prior art, the online temperature measurement system has good insulation and anti-electromagnetic interference performance and solves the problem of difficulty in monitoring a contact operation temperature inside such power equipment as a switch cabinet, a transformer and the like.

Description

technical field [0001] The invention belongs to the field of electric passive wireless temperature measurement, in particular to an online temperature measurement system based on a passive surface acoustic wave sensor. Background technique [0002] The safety and operational efficiency of the power system are related to the development of the entire national economy and the stability of people's lives. Condition monitoring of power equipment is the most effective method to ensure safe operation of power grid and optimal utilization of power system resources, and temperature is one of the most important data for condition monitoring of power equipment. An abnormal rise in the local temperature of the power equipment means that a short circuit or insulation aging may occur. By monitoring the temperature of the power equipment, the operation of the power equipment can be understood in real time, and the hidden danger can be found and dealt with as soon as a hidden danger occurs...

AI Technical Summary

Problems solved by technology

At present, the temperature measurement methods of power equipment can be summarized as: thermocouple, infrared temperature measurement, fiber optic grating, active wireless, which have problems such as various types of power equipment, complex structure, strong electromagnetic interference, etc., resulting in the lack of universality of various temperature measurement methods. Adaptability, poor practical applicability

Especially in power equipment such as switch cabinets and transformers, the requirements for insulation and anti-electromagnetic interference are relatively high, which makes it difficult to monitor the operating temperature of their contacts

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