A four-quadrant silicon photocell with built-in monitoring code

Abstract

The invention provides a four-quadrant silicon photocell with a monitoring code inside. The four-quadrant silicon photocell comprises a light receiving face and a shady face, the light receiving face is composed of detection codes positioned at four corners, the monitoring code positioned in the middle of the detection codes and an electrode lead light current signals of each code channel, the shady face serves as a ground wire area shared by light current of each code channel and is led out through an electrode lead. Sunlight penetrates a mask glass light passing hole and irradiates onto the light receiving face of the silicon photocell. When the sunlight irradiates by different vector angles, the code channels are different in irradiated area and output light current different in amplitude, and the light current is led out through the electrode lead. By collecting the light current of each code channel, the four-quadrant silicon photocell can be used for solar vector biaxial azimuth angle detection and field-of-view border indication. The novel four-quadrant silicon photocell can be used for building a biaxial-simulation solar sensor, brings more convenience to building a field-of-view border while meeting requirements of biaxial solar vector angle detection, is flexible in algorithm and reliable in application and has wide application prospect.

Description

technical field [0001] The invention relates to a four-quadrant silicon photocell with a built-in monitoring code, which belongs to the technical field of analog sun sensors in the spacecraft GNC system. 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 rea...

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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