A real-time line time adjustment device and adjustment method for a push-broom optical remote sensing camera

Abstract

A real-time line time adjustment device for a push-broom optical remote sensing camera relates to the field of optical remote sensing imaging technology, which solves the existing problem that the high-frequency and high-precision line time setting cannot be achieved and affects the imaging effect of the camera system. The device includes: a host computer , data communication bus, high-speed logic gate array device, photoelectric detector and high-speed data interface, the data communication bus is connected to the upper computer, and the high-speed logic gate array device is connected to the data communication bus, photoelectric detector and high-speed data interface; the upper computer can Calculate the line time of the photodetector by calculating the track parameters and generate the line time setting instruction. The high-speed logic gate array device can perform linear interpolation according to the received line time setting instruction to obtain the line time control signal, and can send the line time control signal to the photodetector . The invention effectively relieves the pressure of the data communication bus, has high reliability, is easy to realize, realizes precise line time adjustment, and can obtain high-quality image data.

Description

technical field [0001] The invention relates to the technical field of optical remote sensing imaging, in particular to a real-time line time adjustment device and adjustment method of a push-broom optical remote sensing camera. Background technique [0002] The push-broom optical remote sensing camera is mainly designed and realized based on the line array TDI CCD or TDI CMOS photodetector. With the relative movement of the target, the charges after exposure will also be transferred between lines and re-exposed to the same target to achieve multiple repeated exposures to the same target and complete the accumulation of exposure charges, thereby effectively improving the detection ability of the imaging system for the target . During the entire push-broom imaging process, it is required that the moving speed of the photosensitive charge matches the image moving speed of the ground object, so that clear image data can be obtained. However, during the orbital movement of the ...

AI Technical Summary

Problems solved by technology

For some special needs or to achieve higher-precision image motion matching, the line time update frequency of the camera imaging system must be higher, such as line time update frequency is 100Hz or 1kHz, etc., according to the conventional design method, directly improve The transmission frequency of the line time command, but may be limited by the actual transmission bandwidth, the update frequency of the line time command still cannot meet the expected index, cannot meet the specific application requirements, cannot achieve accurate line time setting, and affects the imaging effect of the camera system

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