Abstract: In order to solve the problems that wrong page- detecting instruments are determined by importing from over- seas printing corporations, a wrong page-detecting instrument via Atmega128 MCU and fuzzy recognition theory is developed for automatic bookbinding machines. This instrument detects dynamically wrong pages located in many word pages, graphic pages and word-graphic pages, and at the same time, takes a message to automatic bookbinding machine that lets wrong pages pass as soon as receiving the message. This instrument can communicate with computers by RS232 protocol, too. A detecting algorithm developed via fuzzy recognition theory is stored in wrong page-detecting instrument. And this instrument detects wrong pages by two detecting modes, one is self-adaptive detecting mode, the other is non self-adaptive detecting mode. Experiments show that precision of this wrong page-detecting instrument is 0.5%, and posses fine stability.

Key words: Adaptive algorithms, Membership functions, Pattern recognition, dimension model, dimensioning mode, the contact path graph, the shortest spanning tree, assembly dimension