Ablation sensor based on metal sputtering thin film technology

Abstract

The invention relates to a metal sputtering thin film technology-based ablation sensor. The metal sputtering thin film technology-based ablation sensor includes a shell with an ablation sensor sensitive assembly arranged therein; the ablation sensor sensitive assembly is composed of a metal wire grid, a substrate material and leads; the metal wire grid is plated on the substrate material through a metal sputtering thin film technology; one end of each lead is connected with the metal wire grid, and the other ends of the lead extend out from the shell, so that the signals of the metal wire grid can be transmitted to a conditioning module; and a filler is arranged between the shell and the ablation sensor sensitive assembly in a plugging manner. With the metal sputtering thin film technology-based ablation sensor of the invention adopted, real-time and on-line measurement of the linear ablation amount of a C / C composite material can be realized. According to the metal sputtering thin film technology-based ablation sensor, the magnitude of the output signals of the sensor is in direct proportion to the change of the linear ablation amount of the C / C composite material. The metal sputtering thin film technology-based ablation sensor has the advantages of high resolution and high measurement precision, and just lightly damages the body of a measured material.

Description

technical field [0001] The invention belongs to the field of aerospace sensors, in particular to an ablation sensor used for measuring the linear ablation amount of C / C composite materials. Background technique [0002] In the development process of new aerospace vehicles, in order to ensure that the material maintains good and stable mechanical properties under high temperature conditions, it is necessary to use C / C composite materials (carbon / carbon composite materials) to make structural components. These structural components will be subjected to harsh working environments during work, such as high temperature, strong oxidation, strong vibration, strong wind resistance and other complex mechanical loads. Therefore, obtaining the actual structural characteristics of high-temperature structural materials under flight conditions through tests becomes a problem to be solved. key. In the prior art, among many test requirements, the ablation test of high-temperature structura...

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Problems solved by technology

However, due to the harsh test conditions in the flight state and the complexity of the aircraft shell structure, it is very difficult to measure the ablation thickness in real time in this field. In practical applications, methods such as thermocouple target line thickness measurement are difficult to meet the requirements of real-time measurement of aircraft surface ablation due to limitations of installation size and installation conditions, or insufficient resolution and accuracy.

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