Surface acoustic wave temperature sensor with locking device

Abstract

The invention discloses a surface acoustic wave temperature sensor with a locking device. The surface acoustic wave temperature sensor comprises an outer cover, a sensor antenna, a sensor temperature sensing chip, a printed board, a metal bottom plate, a locking mechanism and a metal ribbon, the metal cable ties comprise the first metal cable tie and the second metal cable tie, one end of the first metal cable tie is connected to one side of the metal bottom plate in a buckled mode, and the other end of the first metal cable tie is connected to the adjusting part of the locking mechanism. One end of the second metal cable tie is buckled and connected to the other side of the metal bottom plate, and the other end of the second metal cable tie is connected to the fixing part of the locking mechanism; the locking mechanism is configured to adjust the length of the first metal cable tie between the metal bottom plate and the locking mechanism through the adjusting part; the printed board is welded and fixed on the metal bottom plate, and the sensor temperature sensing chip and the sensor antenna are welded on the printed board and are connected through a microstrip line on the printed board; and the outer cover is arranged outside the sensor antenna and is fixed on the metal bottom plate.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a surface acoustic wave temperature sensor with a locking device. Background technique [0002] The surface acoustic wave temperature sensor is a temperature sensor based on surface acoustic wave technology. It has the advantages of being passive in nature and resistant to high voltage, high current and strong magnetic field. It is widely used in many occasions, especially for temperature monitoring of medium and high voltage equipment. [0003] Temperature monitoring of switch cabinets is an important application of surface acoustic wave temperature sensors. The current delivered by the switch cabinet needs to flow through the contact surfaces of the moving contact and the static contact. Due to the existence of contact resistance, the contact surface of the moving and static contacts is the most concentrated part of the heat in the switch cabinet. Therefore, the tem...

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Problems solved by technology

[0011] In view of the above-mentioned defects of the prior art, the technical problems to be solved by the present invention are: 1) to solve the vibration of the spring-type surface acoustic wave temperature sensor due to the spring being too loose when the sensor body and the static contact are separated, are in the suspension potential, and are statically The problem of high-voltage damage to the contact; 2) Solve the problem of scratching the metal surface of the static contact during installation due to the spring-type SAW temperature sensor being too tight, resulting in an increase in the contact resistance of the dynamic and static contact. 3) Solve the problem of partial discharge of the ring-type surface acoustic wave temperature sensor because the sensor antenna is external and the antenna is in a suspended state; 4) Solve the problem of conventional surface acoustic wave temperature sensors in a small space The problem of inconvenient installation and operation

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