High-sensitivity thermal-response platinum resistor temperature sensor

Abstract

The invention discloses a high-sensitivity thermal-response platinum resistor temperature sensor. A thermal conductive metal cap is fixedly embedded at the top end of a metal protecting pipe of the high-sensitivity thermal-response platinum resistor temperature sensor, a platinum resistor inductive core is arranged inside a counter bored hole of the thermal conductive metal cap, a signal transmission cable is in electric connection with the platinum resistor inductive core, transmitting signals are guided out of the metal protecting pipe, thermal-insulating layers are arranged on the internal part of the metal protecting pipe of the thermal conducting inductive cap and outside the counter bored hole of the thermal conducting cap, and the thermal conducting connecting body of the counter bored hole of the thermal conducting cap is linked up with thermal conducting metal points which are embedded in the backside of the insulating substrate of the inductive core of the platinum resistor in a thermal-conducting mode. The high-sensitivity thermal-response platinum resistor temperature sensor improves induction sensitivity of the sensor, shortens thermal response time, and enables the platinum inductive core to be capable of sensing temperature change of environment sensitively and outputting transmission signals of detection.

Description

technical field [0001] The patent application of the present invention relates to a platinum resistance temperature sensor, in particular to a platinum resistance temperature sensor with a protective thermal sleeve structure. Background technique [0002] Platinum resistance temperature sensor is the most accurate type of sensor for temperature measurement. The typical structure of the existing platinum resistance temperature sensor temperature probe is as follows: figure 1 As shown, the platinum resistance sensing core 5 is put into the blind end of the metal protection tube 1, and the heat-conducting insulating glue 4 is filled in the tube, and the temperature transmission signal of the platinum resistance is connected by the signal transmission cable 8 . The metal protective tube is not only the protective shell of the platinum resistance sensing core, but also the heat conductor for the platinum resistance sensing core to sense the ambient temperature. The existing mate...

AI Technical Summary

Problems solved by technology

Its metal protective tube is not only the protective shell of the platinum resistance sensing core, but also the heat conductor for the platinum resistance sensing core to sense the ambient temperature. The existing materials and the overall protective tube structure cannot have both ideal protection and excellent thermal conductivity.

The existing platinum resistance temperature sensor temperature probe structure has technical problems of low heat conduction efficiency, insensitive temperature sensing, and long thermal response time, especially when the diameter of the temperature sensing probe exceeds 10 mm, the above technical problems become more prominent. The time is obviously too long, usually more than 25 seconds. For applications with stricter requirements on temperature sensing sensitivity, the existing platinum resistance temperature sensor products obviously cannot meet the use requirements.

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