A dual-node heat flow sensor

Abstract

The invention discloses a dual-node heat flow sensor, which is a cylindrical sensor, including 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 composed of thermocouples The two materials are made separately, the inner electrode is a cylinder, and the outer electrode is a cylinder that tightly wraps the inner electrode through an insulating layer; at the end of the sensor, a compensation wire is welded on the side wall of the inner electrode that grows out of the outer electrode 2. A compensation wire 1 and another compensation wire 2 are respectively welded on the side wall near the end of the outer electrode; the material of the compensation wire 2 is the same as that of the inner electrode, and the material of the compensation wire 1 is the same as that of the outer electrode; The node ① where the inner electrode communicates with the outer electrode is formed as node ② where the other compensation wire 2 connects with the outer electrode. The invention has the advantages of simple structure and convenient use, can simultaneously measure the temperature of two nodes, and can be used in wind tunnel test and flight test.

Description

Technical field [0001] The present invention relates to a two-node heat flow sensor belongs to the field of experimental measurement. Background technique [0002] In conventional wind tunnel test and flight tests, the coaxial thermocouple is often used to perform model surface heat flow measurement, and the coaxial thermocouples generally used are single-node coaxial thermocouples (i.e., the surface temperature can be measured), and the sensor has appeared Damage, the temperature information of the measurement position is all lost, the risk is large, and the heat flow measurement of the single-node coaxial thermocouple can only obtain the surface temperature of the model, and the information obtained is small, and the surface heat flow of complex area model has huge difficult. Inventive content [0003] The technical problem solved by the present invention is: providing a two-node heat flow sensor, by optimizing the compensation wire connection of the sensor, selecting a reason...

AI Technical Summary

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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