Real-time scheme of online measurement of screw-thread steel bars

Bingrong Zhang; Zhiying Liu; Wenyi Chen

doi:10.1117/12.253027

3 October 1996 Real-time scheme of online measurement of screw-thread steel bars

Bingrong Zhang, Zhiying Liu, Wenyi Chen

Proceedings Volume 2899, Automated Optical Inspection for Industry; (1996) https://doi.org/10.1117/12.253027
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper we proposed a scheme of on-line measurement of screw-thread steel bar in real-time, which its operation principle is discussed in detail. With the aid of real-time, we have taken the following procedures: 1) By means of self- adjusting threshold voltage-level, the binary image is obtained through hardware. 2) By using run-length coding, the binary image is compressed furthermore and the sum of data to be processed is greatly reduced. 3) A special organization of the coding data, as well as a flexible employment of a novel dual-port RAM, make the CPU of computer capable of reading and saving the data directly from the storage buffer.

Citation Download Citation

Bingrong Zhang, Zhiying Liu, and Wenyi Chen "Real-time scheme of online measurement of screw-thread steel bars", Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); https://doi.org/10.1117/12.253027

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