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Oscillatory temperature sensor powered by RF (radio frequency) signals

A temperature sensor and radio frequency signal technology, applied in the field of sensors, can solve the problems of short working distance and inconvenient use of sensors, and achieve the effect of long working distance, increased working distance and accurate reading

Active Publication Date: 2014-12-10
CETC CHIPS TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Oscillatory temperature sensor powered by RF (radio frequency) signals

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Embodiment

[0020] Oscillating temperature sensors powered by RF radio frequency signals, such as figure 1 As shown, it includes an antenna 1, an energy harvesting module and a sensor head; the antenna 1 is used to receive radio frequency signals; the energy harvesting module includes a matching circuit, a first diode D1 and a power management circuit; the matching circuit includes a matching inductor L1 and Matching capacitor C4, the matching capacitor C4 is connected in parallel with the feed point end of antenna 1, and the matching inductor L1 is connected in series between the feed point end of antenna 1 and the anode of the first diode D1; the power management circuit includes a DC / DC boost chip A1 and the energy storage capacitor C5, the input terminal of the DC / DC boost chip A1 is connected to the cathode of the first diode D1, and the load voltage output terminal of the DC / DC boost chip A1 is connected to the fire wire of the oscillating temperature sensor , the energy storage vol...

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Abstract

The invention provides an oscillatory temperature sensor powered by RF (radio frequency) signals. The oscillatory temperature sensor comprises an antenna, an energy acquisition module and a sensing head. The energy acquisition module comprise a match circuit, a first diode and a power management circuit; the match circuit is connected with the first diode; the power management circuit comprises a DC / DC (direct current to direct current) boost chip and an energy storage capacitor, an input end of the DC / DC boost chip is connected with a cathode of the first diode, a load voltage output end of the DC / DC boost chip is connected with a live wire of the oscillatory temperature sensor, and an energy storage voltage output end of the DC / DC boost chip is connected with a ground wire of the oscillatory temperature sensor through the energy storage capacitor; the sensing head comprises a surface acoustic wave resonator and a triode, and the surface acoustic wave resonator and the triode are combined to form a surface acoustic wave oscillator. Return signals can be transmitted by higher power, and working distance of the sensor is increased while data transmission time of the sensor is prolonged; data of the sensor can be read remotely by a reader, so that convenience in use is achieved.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to an oscillation temperature sensor. Background technique [0002] Equipment such as power switchgear, transformers and high-voltage transmission lines play an important role in the high-voltage transmission industry. However, after long-term use of these devices, aging phenomena such as rust will occur, which will affect the conductivity of the metal conductor, increase the resistance of the conductor, and generate 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 sev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/22
Inventor 肖立龙峥陈婷婷
Owner CETC CHIPS TECH GRP CO LTD
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