Color code position information recording device and method based on FPGA (field programmable gate array) timestamp

Abstract

The invention relates to a color code position information recording device and a color code position information recording method based on an FPGA (field programmable gate array) timestamp. The color code position information recording method based on the FPGA timestamp comprises the following steps of generating high-frequency timestamp information by utilizing an FPGA timing module, recording rising edge or reducing edge of each color code signal by the high-frequency timestamp, estimating position offset corresponding to the color code signal according to continuing time of each four-fold frequency post-position signal and time offset of the color code signal, so as to greatly improve the measurement precision; and simultaneously, buffering the detected color code information without processing in time through an annular FIFO (first in first out) buffering region so as to be capable of meeting requirements of high-speed record of the color code position information. Compared with the normal color code information recording method, the color code position information recording method based on the FPGA timestamp disclosed by the invention can reach 10ns even higher precision, can meet the requirements on high-speed high-precision record of the color code position information in industries of package, printing and the like.

Description

technical field [0001] The invention relates to a method for recording color mark detection information in packaging and printing industries, in particular to a high-speed and high-precision recording method of color mark position information based on FPGA time stamps and an implementation device thereof. Background technique [0002] In the field of color mark detection in packaging, printing and other industries, it is generally realized by directly recording the position information after the 4-fold frequency of the encoder. This method is simple and clear, and has been widely used in packaging, printing and other industries. However, as the packaging and printing fields have higher and higher requirements for the detection accuracy of color marks, simply recording the position information after the 4-fold multiplication of the encoder will lead to the following two problems: First, the recording results are seriously discretized Second, the method of recording the color ...

AI Technical Summary

Problems solved by technology

However, as the packaging and printing fields have higher and higher requirements for the detection accuracy of color marks, simply recording the position information after the 4-fold multiplication of the encoder will lead to the following two problems: First, the recording results are seriously discretized Second, the method of recording the color mark signal simply through the interrupt response of the MCU processor may lose the position information of the color mark, so this method cannot meet the industry's requirements for the detection accuracy of the color mark.

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