Split plug-in type surface acoustic wave temperature sensor

Abstract

The invention discloses a split plug-in type surface acoustic wave temperature sensor, which is characterized by comprising a surface acoustic wave temperature sensing chip, a ceramic antenna, a sensor shell, an arc-shaped upper bracket, a groove-shaped lower bracket and a heat-conducting gasket, the surface acoustic wave temperature sensing chip is fixedly connected to the side surface of the ceramic antenna; the ceramic antenna is arranged in the sensor shell; the internal space of the sensor shell is matched with the ceramic antenna; the ceramic antenna is fixed on the top surface of the arc-shaped upper support, the sensor shell, the arc-shaped upper support and the groove-shaped lower support are connected through screws, and the heat-conducting gasket is arranged at the bottom of the groove-shaped lower support. The ceramic antenna is used as a built-in antenna of the surface acoustic wave, the height of the antenna is greatly reduced, the sensor is only 10mm higher than the chrysanthemum head after being mounted, the mounting requirement of a moving contact is met, and an up-and-down double-clip type mounting method is adopted, so that the sensor is ensured to be in close contact with the chrysanthemum head at any time, keep equipotential and be not damaged by high voltage of the chrysanthemum head after being mounted. According to the invention, reliable temperature monitoring of the moving contact by the surface acoustic wave temperature sensor is realized.

Description

technical field [0001] The invention relates to the field of temperature sensors, in particular to a split plug-in type surface acoustic wave temperature sensor. Background technique [0002] Temperature is an important indicator of the health status of electrical equipment, and it is also the core content of electrical equipment status monitoring. For medium voltage switchgear, the joint part of dynamic and static contacts is the electrical channel for transmitting large current. Due to the existence of contact resistance, it is also the most serious part of heat generation in the switchgear. For the temperature monitoring of the switch cabinet, the monitoring of the moving and static contacts is the most preferred monitoring object. [0003] In comparison, the moving contact and the circuit breaker are a whole. After the handcart is pulled out, the temperature sensor can be installed. The construction is simple and convenient, so monitoring the temperature of the moving c...

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Problems solved by technology

[0012] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is: when adopting the scheme of split installation, fixing by screws, and filling the installation gap with thermal pads, it is necessary to solve the problem of buckle-type and binding-type Due to the loose contact between the sensor and the moving contact caused by the installation method, the partial discharge of the switch cabinet and the damage of the sensor itself are induced; when the ceramic antenna is used to reduce the height of the antenna, it is necessary to solve the problem that the conventional surface acoustic wave temperature sensor cannot be used on the moving contact. header installation problem

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