Non-fixed contact type thermocouple

Abstract

The invention provides a non-fixed contact type thermocouple, comprising a substrate layer electrode. The non-fixed contact type thermocouple further comprises a film coating floatation layer electrode suspending above the substrate layer electrode, wherein the substrate layer electrode and the film coating floatation layer electrode are peripherally sealed, and a sealing cavity is formed between the substrate layer electrode and the film coating floatation layer electrode; and supporting gas for preventing the substrate layer electrode and the film coating floatation layer electrode from contacting at a non-working state is filled in the sealing cavity. According to the thermocouple the film coating floatation layer electrode can contact with the substrate layer electrode due to stress deformation in an entire effective area so as to form a loop, and the effective contact area of the thermocouple is wider, so that the thermocouple provided by the invention can be accurately and effectively adhered to a temperature measurement point or face, has high sensitivity, is not limited by a shape of a surface to be detected, has relevantly loose requirements on absolute positions of the thermocouple and an object to be detected, and can ensure effective accuracy of temperature measurement. Meanwhile, a fixing manner in the prior art is replaced by using a pressing manner to the thermocouple, so as to achieve simple operation.

Description

Technical field [0001] The invention relates to a temperature sensor, in particular to a non-fixed contact type thermocouple. Background technique [0002] A thermocouple is a commonly used temperature measuring element in temperature measuring instruments. It is a closed loop formed by two conductors of different materials. When the temperature of the two junctions of the thermocouple is different, a thermoelectric potential will be generated in the loop. If there is a temperature difference between the measuring end of the thermocouple and the reference end, the display instrument will display the thermoelectric potential generated by the temperature value of the thermocouple. The thermoelectric potential of the thermocouple will change with the temperature of the measuring terminal. Its size is only related to the temperature of the thermocouple's bipolar materials and the two junction points, and has nothing to do with the length and diameter of the thermoelectrode. The appe...

AI Technical Summary

Problems solved by technology

For example: Improper installation or use, the position of the thermocouple probe and the measuring point cannot be guaranteed to fit completely, the relative position of the thermocouple probe and the measuring point is inconvenient to determine, or the measured surface is an irregular surface so that the thermocouple is inconvenient to place, all will be Large measurement errors are caused; qualified thermocouples will also be unqualified due to improper operation; in reducing atmospheres such as carburizing, the accuracy of K-type thermocouples will also be out of tolerance due to selective oxidation

Images