Oscillating temperature sensor using rf radio frequency signal as energy

Abstract

The oscillating temperature sensor with RF radio frequency signal as energy provided by the present invention includes an antenna, an energy collection module and a sensor head; the energy collection module includes a matching circuit, a first diode and a power management circuit; the matching circuit and the second A diode connection; the power management circuit includes a DC / DC boost chip and an energy storage capacitor, the input terminal of the DC / DC boost chip is connected to the cathode of the first diode, and the load voltage output of the DC / DC boost chip The end is connected to the fire wire of the oscillating temperature sensor, and the energy storage voltage output end is connected to the ground wire of the oscillating temperature sensor through the energy storage capacitor; the sensor head includes an acoustic surface resonator and a triode. The SAW oscillator is formed by combining the SAW resonator and the triode, which can transmit the return signal with greater power, increasing the working distance and data transmission time of the sensor. The reader can read the data of the sensor at a long distance and is easy to use.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to an oscillating temperature sensor. Background technique [0002] Equipment such as power switch cabinets, transformers, and high-voltage transmission lines play an important role in the high-voltage power transmission industry. However, after long-term use of these devices, aging phenomena such as rust will occur, which affects the conductivity of metal conductors, increases conductor resistance, and generates heat under high voltage conditions. During the peak power supply in summer, the high temperature can cause fires and even explosions. In order to solve this problem, the best way is to install a temperature sensor at the position where there is a metal conductor inside the device, monitor the temperature change in real time, and cut off the power supply in case of abnormal temperature. [0003] However, the installation of sensors inside high-voltage equipment is limited by several...

AI Technical Summary

Problems solved by technology

However, the sensor still has the following problems to be solved: the working distance of the sensor is short (less than 3 meters), so that the reader must be used within a certain distance from the sensor head, which is inconvenient to use

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