An Ablation Thickness Sensor Using Film Technology

Abstract

The invention discloses an ablative thickness sensor using membrane technology. The ablative thickness sensor comprises an ablative measuring rod, a housing, a circuit board, and a connector assembly. The ablative measuring rod and the connector assembly are connected with the circuit board. The circuit board is installed inside the housing. The ablative measuring rod comprises an insulated tube, an inner core metallic line, an insulated fastening loop, and a plated film lead. The outer wall of the insulated tube is plated with a surface plating film layer. The surface of the surface plating film layer is coated with a surface protective coating. The inner core metallic line is inserted into the insulated tube. The inner core metallic line is electrically connected with the surface plating film layer by the front end of the insulated tube by means of conductive adhesive. The plated film on the outer wall of the tail end of the insulated tube is connected with the plated film lead. A resistor is formed by the plated film lead and the inner core metallic line. The insulated fastening loop sleeves the outer wall of the tail end of the insulated tube. The ablative thickness sensor has advantages of small size, light weight, high precision, low damage to a heatproof layer, simple manufacturing technique, and convenient cost control, can be standardized, serialized and miniaturized, and has no radioactive pollution.

Description

technical field [0001] The invention relates to the technical field of aerospace measurement, in particular to an ablation thickness sensor using a membrane process, which can be used for new material testing and on-line monitoring in the fields of aviation, smelting, power plants and the like. Background technique [0002] The so-called ablation refers to the phenomenon of material consumption on the solid surface caused by thermochemical and mechanical processes under the action of heat flow when missiles and aircraft re-enter the atmosphere. [0003] Ablation materials, also known as heat-resistant layers, are mainly used for missile heads, manned return module heat-resistant outsoles, space shuttle heat-resistant tiles, etc. Under the action of heat flow, this material can undergo physical and chemical changes such as decomposition, melting, evaporation, sublimation, and erosion. The mass consumption of the surface of the material takes away a large amount of heat to coo...

AI Technical Summary

Problems solved by technology

However, these ablation thickness sensors have different degrees of shortcomings, which makes the ablation thickness sensor very dangerous.

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