Double-axis minisize analog sun sensor

Abstract

The invention provides a double-axis minisize analog sun sensor. The sun sensor is composed of a photoelectric module and a major structure. The photoelectric module comprises mask glass, a mask glass installing plate, a silicon photocell, a ceramic base, a base installing plate, support screws and conical nuts. The major structure comprises a shell, a sealing gasket, a rear cover and an electric connector. Sun rays penetrate through a light through hole in the mask glass and reaches the light receiving surface of the silicon photocell, different photo-generated currents are output through detection photosensitive areas of the silicon photocell, and the sun vector two-axis azimuthal angle is further calculated out; when the sun vector azimuthal angle goes beyond a view field of the sun sensor, a monitored photosensitive area corresponding to the super view field direction outputs the photo-generated currents due to illumination, and thereby an indication of going beyond the view field boundary is given out. By means of the sensor, high accuracy measurement of the sun vector angle can be achieved within the double-axis large view field range, the design characteristics of modularization and lightweight are achieved, the development trends of microminiaturization and intellectualization of a future satellite platform can be fully satisfied, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to a biaxial miniature analog sun sensor, which belongs to the technical field of solar sensors in the GNC system of spacecraft. Background technique [0002] The sun sensor can be used to detect the orientation of the space vehicle body fixedly connected with the sun sensor relative to the sun vector to determine the attitude of the space vehicle. It is suitable for attitude control and sailboard of satellites, spacecraft and probes in various orbits. Orientation and other tasks are important measurement components in the spacecraft GNC system. [0003] Microsatellites have the characteristics of light weight, small size, short development cycle, strong mobility, flexible launch, and formation networking. They have unique application value in military and civilian high-tech, and have developed rapidly in recent years. Like conventional satellites, the GNC system is an important guarantee for the realization of various functions ...

AI Technical Summary

Problems solved by technology

[0004] Analog solar sensors based on photovoltaic characteristics of photovoltaic cells have great advantages in small size, low power consumption, low cost, and high update rate. However, most of the current analog solar sensors are based on A / B silicon photocells, which can only measure The single-axis sun vector angle, and the sensor volume, quality, field of view and accuracy cannot meet the growing development needs of spacecraft, especially the development of micro-satellites, which poses severe challenges to its application

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