Assembly-design-oriented novel high-temperature-resistant angular displacement sensor

Abstract

The invention provides an assembly design-oriented novel high-temperature-resistant angular displacement sensor, which comprises a rotating shaft and an electric brush assembly, and is characterized in that the rotating shaft is provided with a plurality of petal type platform assemblies, the plurality of petal type platform assemblies are arranged at intervals along the axial direction of the rotating shaft, and the adjacent petal type platform assemblies are arranged in a staggered manner; the electric brush assembly comprises a brush holder, the brush holder is provided with a petal groovematched with the petal type platform assembly in shape, and the brush holder is fixedly connected with the petal type platform assembly. By adopting the angular displacement sensor provided by the invention, the quality problem possibly existing in the production and use process of the angular displacement sensor can be solved, the product percent of pass is improved, and meanwhile, the working reliability of the angular displacement sensor is also greatly improved; and rapid and accurate measurement can be carried out in a narrow and harsh working environment, so that the measurement reliability is improved.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a novel high temperature resistant rotary angular displacement sensor. Background technique [0002] The servo system of the launch vehicle often uses angular displacement sensors to measure the displacement of the piston rod and participate in the feedback of the control system. Due to the high temperature and harsh environment around the launch vehicle engine, the angular displacement sensor not only needs to have output stability and reliability to ensure the control accuracy and working reliability of the servo system, but also needs to have a certain high temperature resistance. [0003] There are still many problems in the production and use of the angular displacement sensor in the prior art. For example, when the outer guide wire of the sensor is bent after welding, the rivet will rotate slightly, resulting in cracks in the silver belt around the rivet; in the production process, ...

AI Technical Summary

Problems solved by technology

[0003] There are still many problems in the production and use of the angular displacement sensor in the prior art. For example, when the outer guide wire of the sensor is bent after welding, the rivet will rotate slightly, resulting in cracks in the silver belt around the rivet; in the production process, When the skeleton is machined and / or riveted, the skeleton often cracks, the qualified rate is extremely low, and the production cycle is long, which affects the delivery of the servo system; during the use of the product, the ring structure has internal stress remaining during machining, and will The non-metallic skeleton is used as the shell, and its performance is easily affected by external force when it is used, which leads to the problem of out-of-tolerance asymmetric resistance value of the sensor; the existing sensor structure is a circular inner wall structure, and the resistance film can only be sprayed on the inner wall of the ring Compared with the linear displacement sensor spraying resistive film on the plane, its initial linearity is lower, and it needs to go through multiple resistance linear repairs to meet the linearity index requirements, and there are a small number of waste products that cannot be repaired and engraved; The belt is "L" shaped and has a right-angled structure, which affects the reliability of electrical connections

It can be seen that the existing angular displacement sensor cannot fully meet the high reliability of the launch vehicle servo system and the requirements of adapting to various harsh working environments; it is necessary to improve the angular displacement sensor to improve the product qualification rate and reliability

Images