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Multichannel LVDS time sequence alignment detector image collection method

An image acquisition and detector technology, applied in the field of photoelectric detection, can solve problems such as no solution, achieve the effect of expanding the scope of application and easy integration

Active Publication Date: 2016-12-07
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

However, these serial / deserialization hard cores only support LVDS signals in specific formats, such as 2bit, 4bit, 6bit, 7bit, 8bit SDR (single edge) signals, or 2bit, 4bit, 6bit, 8bit DDR (double edge) signals , there is no effective solution for special signals output by detectors in some special fields, such as 12bit DDR LVDS signals, which need to be designed by the user

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  • Multichannel LVDS time sequence alignment detector image collection method
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  • Multichannel LVDS time sequence alignment detector image collection method

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Embodiment Construction

[0034] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0035] Such as figure 1 and figure 2As shown, the detector includes multi-channel LVDS signals with different delay intervals. The delay intervals between the different channel LVDS signals are time-aligned by the delay circuit of the corresponding channel. The delay circuit is controlled by FPGA To achieve, the delay circuit includes n cascade-connected delay modules 100, and each delay module includes m series-connected delay units 200'. When multiple delay modules are cascaded, the logic resources used must be constrained to a fixed position so that the delay modules can be serially connected. The performance of the above-mentioned delay circuit based on Xilinx Kinex7 series FPGA is Δt=78ps, m max =31,n max =50, the delay range is: 0~125000ps.

[0036] Such as image 3 As shown, a multi-channel LVDS tim...

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Abstract

The invention discloses a multichannel LVDS time sequence alignment detector image collection method, comprising the following steps: configuring a delay parameter of a delay circuit of each channel according to a delay interval between multichannel LVDS signals output by a detector to realize primary time sequence alignment of the multichannel LVDS signals; adopting a preset serial-to-parallel conversion method to obtain a gray value of each channel according to different serialization factors, respectively caching pixel values collected by each channel by adopting asynchronous FIFO, and generating a complete picture according to an output logic rule of the detector; and detecting a regulation signal of main frequency of the detector, and adopting a preset word alignment and bit alignment algorithm to complete the real-time adjustment of an imaging mode. The multichannel LVDS time sequence alignment detector image collection method disclosed by the invention is easy to realize, high in precision, strong in universality, high in integration degree and strong in adaptive ability.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a multi-channel LVDS timing alignment detector image acquisition method. Background technique [0002] With the continuous improvement of space earth observation technology, large area array and high-resolution detectors have been widely used. In order to achieve high-speed imaging performance, the output signal data throughput of this type of detector can reach 10Gbps~15Gbps, which is realized by using multi-channel high-speed SDR LVDS signal or DDR LVDS signal. [0003] In order to ensure the integrity of the signal, reduce the electromagnetic interference of the signal, and realize the stability of the system, there is generally a time interval between each channel of the multi-channel high-speed LVDS signal. This requires certain measures to be taken at the receiving end of the signal for processing, so that the data acquisition of all channels is synchronize...

Claims

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Application Information

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IPC IPC(8): H04L7/00H04L7/033
CPCH04L7/0033H04L7/033
Inventor 刘玉娇刘宗明胡益飞孙俊陈文
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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