Sun sensor and measuring method thereof

Abstract

The invention discloses a sun sensor and a measuring method thereof, relating to a device of an attitude sensor for measuring the relative positions of an aerocraft such as a satellite and the like and the sun and a measuring method thereof. The device comprises a light path introducer, a photosensor and a signal processor. The light path introducer consists of a reference optical fiber and introducing optical fibers, wherein the reference optical fiber is arranged at the center of the light path introducer, 2-2n pairs of introducing optical fibers are uniformly distributed on a circular track taking the reference optical fiber as the center of the a circle, wherein n is 2, 4 or 8, each pair of the introducing optical fibers comprise two optical fibers which are symmetrically distributed based on the center of the circle, and the end face normal of each introducing optical fiber and the end face normal of the reference optical fiber form an included angle of 15-60 degrees. The photosensor consists of photoelectric sensing elements with the same number as that of optical fiber, and the output end of each optical fiber is in butt joint with a photoelectric sensing element. The invention has the characteristics of high-precision resolution ratio, small volume, light weight, simple structure, low price and suitability for aerospace environment, and has wide generalization and application prospects.

Description

technical field [0001] The invention relates to a device and a measuring method of an attitude sensor between the position of an aircraft such as a satellite and the sun, and in particular to a sun sensor using a multi-channel light-guiding optical fiber as a light introducer and a measuring method thereof. Background technique [0002] The sun sensor is the most widely used type of positioning sensor in the field of aviation and aerospace, and the sun sensor must be equipped on the aircraft and the satellite. Determine its own attitude by measuring the position of the sun relative to the aircraft body coordinate system. The sun is chosen as the reference target because the angular radius of the apparent disk of the sun is almost independent of the orbit of the aircraft. Therefore, for most applications, treating the sun as a point light source simplifies the sun sensor design and the aircraft attitude determination algorithm . In addition to providing attitude information...

AI Technical Summary

Problems solved by technology

However, because cosmic high-energy particles in space are easy to cause damage to the bombardment of photosensitive sensors such as CCDs, digital solar sensors cannot be used in aerospace environments.

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