Double-node heat flow sensor

Abstract

The invention discloses a double-node heat flow sensor. The double-node heat flow sensor is a column type sensor, and comprises an outer electrode, an insulating layer, an inner electrode, a compensation wire 1 and two compensation wires 2; the outer electrode and the inner electrode are made of two materials capable of forming a thermocouple respectively, the inner electrode is a column body, andthe outer electrode is a cylinder body which is tightly wrapped the insulating layer around the inner electrode; one compensation wire 2 is welded to the side wall of the end part of the inner electrode, extending out the outer electrode, at the tail end of the sensor; the compensation wire 1 and the other compensation wire 2 are welded to the side wall near the end part of the outer electrode respectively; the compensation wires 2 and the inner electrode are made of the same material, and the compensation wire 1 and the outer electrode are made of the same material; and a node 1 which is incommunication with the inner electrode and the outer electrode is formed at the top end of the sensor, and a node 2 is formed at the joint between the other compensation wire 2 and the outer electrode. The double-node heat flow sensor has the advantages of being simple in structure, convenient to use, capable of carrying out temperature measurement on two nodes at the same time, and capable of being used in a wind tunnel test and a flight test.

Description

technical field [0001] The invention relates to a dual-node heat flow sensor, which belongs to the field of experimental measurement. Background technique [0002] In conventional wind tunnel tests and flight tests, coaxial thermocouples are often used to measure the heat flow on the model surface, and the coaxial thermocouples generally used are single-node coaxial thermocouples (that is, only the surface temperature of the model can be measured). If it is damaged, all the temperature information at the measurement position will be lost, and the risk is greater. In addition, the heat flow measurement using a single-node coaxial thermocouple can only obtain the surface temperature of the model, and the information obtained from the measurement is less, which brings great benefits to the heat flow identification of the model surface in complex areas. difficulty. Contents of the invention [0003] The technical problem solved by the present invention is to provide a dual-no...

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Problems solved by technology

[0002] In conventional wind tunnel tests and flight tests, coaxial thermocouples are often used to measure the heat flow on the model surface, and the coaxial thermocouples generally used are single-node coaxial thermocouples (that is, only the surface temperature of the model can be measured). If it is damaged, all the temperature information at the measurement position will be lost, and the risk is greater. In addition, the heat flow measurement using a single-node coaxial thermocouple can only obtain the surface temperature of the model, and the information obtained from the measurement is less, which brings great benefits to the heat flow identification of the model surface in complex areas. difficulty

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