A high-speed scanning and data acquisition method of a multi-window image data high-speed scanning and acquisition device of a grating ruler

Abstract

The present invention is an image sensor multi-window image data high-speed scanning and acquisition device and method. The multi-window image data high-speed scanning and acquisition device of the grating ruler includes a CMOS image sensor, a field programmable gate array FPGA and a static random access memory SRAM , wherein the signal input end of the field programmable gate array FPGA is connected with the signal output end of the CMOS image sensor, the signal output end of the field programmable gate array FPGA is connected with the signal input end of the static random access memory SRAM, and the static random access memory The signal output end of the SRAM is connected to the SRAM interface of the DSP. The present invention collects image data at high speed by using a field programmable gate array FPGA, and when the image sensor moves very fast, the grating code can be clearly photographed, which greatly reduces the difficulty of later image processing. The invention aims at the multi-window drive of the image sensor by the absolute grating ruler; the method of improving the shooting speed by reducing the useless pixels; and obtaining a longer effective length with fewer pixels by placing the window position.

Description

technical field [0001] The invention relates to the field of grating ruler measurement based on image processing, in particular to a device and method for high-speed scanning and collecting multi-window image data of an image sensor, and belongs to an innovative technology of the high-speed scanning and collecting device and method for multi-window image data of an image sensor. Background technique [0002] At present, the principle of the grating scale is basically based on the measurement of the Moiré fringes produced by the grating scale interference or diffraction. Although this design method has been developed so far, although it is quite mature, there are still many deficiencies, such as relatively complicated principles, relatively complicated circuit design, and relatively high requirements. [0003] In this context, the grating ruler based on image processing came into being. However, the grating ruler based on image processing on the market cannot guarantee the r...

AI Technical Summary

Problems solved by technology

However, the grating ruler based on image processing on the market cannot guarantee the real-time performance of the measurement when the moving speed is very fast.

The reason is that the capture speed of the image is not fast enough, and the capture of the entire image results in a large number of pixel exposures and a waste of transmission time

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