胶片种类智能探测方法

Intelligent detection method for film type

Abstract

胶片种类智能探测方法:(1)制作红外探测装置,所述红外探测装置由前后两个固定板、四个支架、红外发射回路和红外接收回路构成;(2)将红外探测装置探测到采样值进行放大、滤波,然后将采样模拟值转换成数字信号,并对所述采样数字信号进行数字滤波,最后得到滤波后的采样值;(3)将得到的滤波后的采样值与设定的阈值进行比较,如果所述采样值高于阈值,则被判断为牵引片,如果所述采样值小于阈值则为拷贝片;阈值的确定方法为:通过试验测得,即在牵引片与拷贝片分别通过时,两者的数字值的变化区间没有重叠,则定义两个区间之间的一个值作为阈值。本发明实现了胶片种类的自动判别,可靠性和灵敏度高。
The invention discloses an intelligent detection method for a film type, which comprises the following steps: (1) manufacturing an infrared detection device which consists of front and rear fixed plates, four brackets, an infrared transmitting loop and an infrared receiving loop; (2) amplifying and filtering a sampling value detected by the infrared detection device, converting a sampling analog value into a digital signal, digitally filtering the sampling digital signal, and finally acquiring a filtered sampling value; and (3) comparing the acquired filtered sampling value with a set threshold value, judging the film as a leader film if the sampling value is greater than the threshold value, and judging the film as a copy film if the sampling value is smaller than the threshold value, wherein a method for determining the threshold value is characterized in that through test measurement, namely when the leader film and the copy film pass the test respectively, the change intervals of the digital values of the both have no superimposition, and a value between the two intervals is defined as the threshold value. The method realizes automatic judgment of the film type, and has high reliability and sensitivity.

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