Needle-like coaxial thin-film thermocouple for measuring transient temperature

Abstract

The invention discloses a needle-like coaxial thin-film thermocouple for measuring a transient temperature, and belongs to the technical field of sensors. The needle-like coaxial thin-film thermocouple comprises a thermocouple coaxial structure comprising a needle-like measuring end, thermal electrodes and an insulating layer, wherein the measuring end comprises a thermal electrode I and a thin-film coating, and the thin-film coating is arranged on the needle-like top surface of the thermocouple coaxial structure; the thermal electrode I is covered with the insulating layer; the insulating layer and a thermal electrode II are adhered with glue; the thin-film coating and the wire-shaped thermal electrode are connected to form a thermocouple thermal connection point which is the measuring end; a lead I is connected with the thermal electrode I, and a lead II is connected with the thermal electrode II; and the measuring end converts measured temperature signals into electrical signals and transmits the electrical signals to a cold junction compensation and signal conditioning module and a computer testing system through wires.

Description

technical field [0001] The invention relates to a needle-shaped coaxial thin-film thermocouple for measuring transient temperature, belongs to the technical field of sensors, in particular to the technical field of temperature sensors. Background technique [0002] Temperature is one of the seven international standard units. The establishment of the concept of temperature and the measurement of temperature are based on the phenomenon of thermal equilibrium. Two objects in thermal equilibrium have the same temperature. How to reduce the thermal inertia of the temperature measurement sensor and enhance the ability of accurate and rapid temperature measurement is a research hotspot in the field of modern temperature measurement. Thin-film thermocouple is an advanced sensor for measuring transient temperature changes in modern times. It is widely used in the temperature measurement of the inner wall of the gun bore, the top surface of the piston of the internal combustion engin...

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Problems solved by technology

However, these methods of measuring bearing temperature are susceptible to interference from environmental factors, such as sunlight, ambient temperature, etc., and have low measurement accuracy and slow response speed.

With the increase of the speed of railway vehicles, the existing axle temperature monitoring methods can no longer meet the monitoring needs of rapidly changing bearing temperatures

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