Double-node heat flow sensor wire sequence detection method

Abstract

The invention discloses a double-node heat flow sensor wire sequence detection method. The method is simple to operate, convenient to use and can be used for rapidly detecting a wire sequence of 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 a, a compensation wire b and a compensation wire c, can be used for measuring the temperature of the two nodes at the same time, can be used in a wind tunnel test and a flight test, but the compensation wire b and the compensation wire c are not easy to distinguish. The wire sequence detection method comprises the following steps that (1) the double-node heat flow sensor is installed on a model wall surface; (2) a thermal excitation is applied to the head of the sensor; (3), the voltage values between X and Y of the first compensation wire a and the other two to-be-distinguished compensation wires are simultaneously measured, namely, the voltage values are Vax and Vay; and (4), the magnitudes of the absolute values of the two voltage values are compared, if the absolute value Vax is larger than the absolute value Vay, the compensation wire X is a second compensation wire b, and the compensation wire Y is a third compensation wire c; and the absolute value Vax is smaller than the absolute value Vay, the compensation wire X is a third compensation wire c, and the compensation wire Y is a second compensation wire b.

Description

technical field [0001] The invention relates to a line sequence detection method of 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 prese...

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Problems solved by technology

[0003] The technical problem solved by the present invention is: to provide a dual-node heat flow sensor. At the same time, aiming at the problem that the sensor line sequence is not easy to distinguish, a line sequence detection method is proposed. By applying thermal excitation to the top node of the sensor, the front and rear of the sensor A measurement node produces a temperature difference, and simultaneously measures the voltage value between two compensation wires of the same material and another compensation wire, and distinguishes the order of the two compensation wires of the same material according to the relative magnitude of the voltage absolute value

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