Double-spectrum autonomous navigation sensor and design method of double-spectrum autonomous navigation sensor

Abstract

The invention relates to a double-spectrum autonomous navigation sensor and a design method of the double-spectrum autonomous navigation sensor. The sensor comprises a stellar visible light band lens, an earth ultraviolet band imaging lens and a CCD (Charge Coupled Device) sensor, wherein the stellar visible light band lens can only image stellar visible light band information, the earth ultraviolet band imaging lens can image earth ultraviolet band information, and the center of an optical axis of the earth ultraviolet band imaging lens is perpendicular to the center of an optical axis of the stellar visible light band imaging lens; and an image formed by the ultraviolet band imaging lens is reflected to the CCD sensor by a 45-degree reflector, and the two lenses can image in the same CCD sensor. The design method comprises the steps of designing the visible light band lens and selecting the earth ultraviolet band imaging lens and the CCD sensor. The double-spectrum autonomous navigation sensor has advantages of low power consumption, high navigation accuracy and low error, and also has the advantage of utilizing stars for covering the whole heavenly body.

Description

technical field [0001] The invention relates to a dual-spectrum autonomous navigation sensor and a design method thereof. Background technique [0002] The star sensor is an optical attitude sensor that senses the radiation of a star and measures the orientation of the aircraft relative to the star. Since the opening angle of the star is very small, and the direction of the starlight in the inertial coordinate system is precisely known, the measurement accuracy of the star sensor is very high. However, since the starlight is very weak, it is difficult to detect the signal, and its imaging requires the use of a high-sensitivity image sensor, such as a resolution tube or a charge coupled device (CCD, Charge Coupled Device). There are many stars in the sky. On the one hand, it brings the advantages of more target stars to choose from and convenient application, but it also brings difficulties in identifying the detected stars. Therefore, it needs to be equipped with strong dat...

AI Technical Summary

Problems solved by technology

Due to the large field of view of the optical system, stray light interference is unavoidable. In addition, due to the large field of view, it brings difficulties to the processing technology, and the information of stars and the earth has been reflected many times, which also reduces the cost for the aircraft. Accuracy of providing navigation information

In addition, because the sensor uses the ultraviolet band information of stars for autonomous navigation, and the number of stars with strong energy in the ultraviolet band is small, only about a few hundred, so it cannot meet the navigation requirements of the whole sky

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