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Spaceflight multichannel TDICCD camera synchronization method

A multi-channel, camera technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve the problems of inconsistent imaging rhythm, poor imaging quality, difficult image stitching, etc., and achieve important engineering application value and reliability. high sex effect

Inactive Publication Date: 2014-09-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problems of inconsistent imaging beats, difficulty in stitching subsequent images, and poor imaging quality caused by independent work of each existing camera, the present invention provides a synchronization method for aerospace multi-channel TDICCD cameras

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  • Spaceflight multichannel TDICCD camera synchronization method
  • Spaceflight multichannel TDICCD camera synchronization method

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 Shown, aerospace multi-channel TDICCD camera synchronous method of the present invention, under the situation that does not increase hardware circuit, utilizes existing RS422 one-to-many communication bus, to aerospace multi-channel TDICCD camera imaging system (imaging channel 1, imaging channel 2 , imaging channel 3, imaging channel 4) carry out synchronous operation, this method is realized by the following steps:

[0021] Step 1, synchronous signal generation: such as figure 2 As shown, after the system is powered on and initialized, the synchronization signal and RXD_REG are initialized to 0. Driven by the main frequency clock, RXD is stored in the RXD_REG register to form a delay of one clock cycle, and the RXD signal and RXD_REG of the RS422 communication bus are detected. The value of the register, when RXD is 0 and RXD_REG ...

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Abstract

A spaceflight multichannel TDICCD camera synchronization method relates to the spaceflight camera synchronization field, and solves the existing problems that the imaging beat is not consistent, the subsequent image splicing is difficult and the imaging quality is poor due to the independent work of cameras. The method comprises the steps of using a high frequency clock to detect an RXD signal of an RS422 communication bus, when the RXD changes from 1 to 0, setting a synchronization signal Sysc_flag as 1, at the same time, ending a detection process and entering a synchronization signal maintenance state; when the synchronization signal Sysc_flag changes from 0 to 1, resetting a clock frequency division counter; when the synchronization signal Sysc_flag changes from 0 to 1, resetting a driving schedule counter, so that the driving schedules of imaging channels are totally consistent from the same reference. The spaceflight multichannel TDICCD camera synchronization method of the present invention does not need any hardware circuit, can realize the signal synchronization among the imaging channels by utilizing a conventional primary backup RS422 communication link, and is higher in reliability.

Description

technical field [0001] The invention relates to the technical field of aerospace camera synchronization, in particular to an aerospace multi-channel TDICCD camera synchronization method. Background technique [0002] With the improvement of the resolution of aerospace cameras, in order to increase the imaging width of the camera, multi-channel splicing imaging is generally used. In order to ensure the reliability of the imaging system, the imaging circuits between each channel are generally independent of each other to avoid circuit failure of a certain channel. cause the entire camera to fail. However, the independent work of each camera will cause inconsistent imaging beats. On the one hand, it will cause difficulties in subsequent image stitching, and at the same time, it will easily cause imaging crosstalk between channels, resulting in a decrease in imaging quality. Therefore, multi-channel can be realized without adding additional hardware. The synchronization between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04
Inventor 贺小军金光曲宏松
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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