Wireless Self-Powered Digital Sun Sensor

Abstract

The invention provides a wireless self-powered digital sun sensor comprising a power module, an MEMS (micro electro mechanical system) light leading-in device, a CMOS (complementary metal oxide semiconductor) image detector and an electronic system, wherein the power module is used for supplying power to the wireless self-powered digital sun sensor; the MEMS light leading-in device comprises at least one group of asymmetrical hole patterns; the CMOS image detector is located below the MEMS light leading-in device and used for detecting light led by the MEMS light leading-in device and outputting row light intensity information of a sensing unit of the detector; the electronic system is used for managing energy supplied by the power module, calculating solar angles of two axes according to the row light intensity information and outputting the solar angles of two axes to an upper computer. The sun sensor is high in minimization and autonomous modularization degree, flexible and convenient to use, self-powered, capable of realizing wireless communication and capable of improving the measurement calculation accuracy of the solar angles of the two axes.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a wireless self-powered digital solar sensor. Background technique [0002] The sun sensor is an optical attitude sensor that takes the sun as the observation object and is connected to the satellite platform. It can measure the vector position of the sun according to the incident light of the sun, and through the measurement of the sun vector position, the sun sensor can provide The information of the two-axis sun angle can be used to determine the orientation of the preset satellite in the body coordinate system, that is, the attitude of the satellite. [0003] In recent years, satellites are gradually developing towards miniaturization and miniaturization, which puts forward higher requirements for solar sensors, which require solar sensors to be small in size, light in weight and low in power consumption. [0004] In the related art, an analog type solar sensor is used, a...

AI Technical Summary

Problems solved by technology

[0004] In the related technology, the analog sun sensor is used, although its power consumption is low and it is easy to realize the self-power supply performance of the system, but due to the limitation of the analog photosensitive device, its accuracy is low and it is susceptible to interference

Compared with the sun sensor of the analog photosensitive device, the digital sun sensor based on the CCD (Charge-coupled Device, electrically coupled device) / CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) device calculates the imaging surface sun spot The position of the center of mass of the satellite can be changed to realize the calculation of the sun's incident angle. Although its measurement accuracy is higher and its reliability is better, and it can accurately obtain the attitude of the satellite, it cannot fully realize the autonomy and small size of the system in terms of volume, mass and power consumption. change

The main reason for the high power consumption and large size of the digital sun sensor is that the power consumption of the digital image detector is high, and peripheral functional circuits need to be configured to realize the control and data output of the image detector, which further increases the power consumption of the system. Power consumption and volume increase the difficulty of miniaturization and self-power supply of digital solar sensors

However, if a low-resolution image detector is simply used to reduce system power consumption, the measurement accuracy of the digital sun sensor will be greatly reduced.

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