Gamma shutdown sensor transmitter cone angle 120° plus or minus 10° ranging method

Abstract

The invention discloses a cone angle 120 degree + / - 10 degree range-finding method of an emitter of a gamma shutdown sensor. The gamma shutdown sensor comprises an emitter and a receiver, the emitter emits gamma rays downwardly along the cone angle, the gamma rays are reflected by the ground, the receiver receives the gamma rays reflected by the ground, and the distance is measured according to relation between the distance and the signal intensity of the received gamma rays. The range-finding method of the gamma shutdown sensor is stable and excellent in the range finding performance, can be used to measure the practical distance from an aircraft to the ground more accurately, and is influenced by the morphology of the landing ground.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to a distance measuring method of a transmitter cone angle of 120° plus or minus 10° for a gamma shutdown sensor. Background technique [0002] In the field of deep space exploration in our country, the soft landing of aircraft on extraterrestrial bodies has become one of the key problems to be solved in the exploration of extraterrestrial bodies. [0003] Among them, accurate measurement of the exact distance between the aircraft and the planet's ground is one of the core technologies. [0004] At present, the performance of one-way launch ranging is not stable enough, and the actual distance between the aircraft and the ground cannot be measured more accurately. At the same time, it is greatly affected by the shape of the landing ground; short-range ranging is not accurate in the complex and harsh environment of extraterrestrial bodies. Contents of the inventi...

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a gamma shutdown sensor transmitter cone angle of 120 ° plus or minus 10 ° distance measurement method, aiming at solving the problem that the one-way transmission range measurement performance is not stable enough, and the distance between the aircraft and the ground cannot be measured more accurately At the same time, the actual distance is greatly affected by the shape of the landing ground, and the problem of inaccurate short-distance ranging in the complex and harsh environment of extraterrestrial bodies

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