Intelligent detection method for film type

A detection method and type of technology, which can be applied in the direction of transmittance measurement, optical device exploration, etc., can solve the problems of complex electrical circuits, poor portability, low sensitivity, etc., and achieve the effect of simple and clear circuits, rapid response and high sensitivity
CN101806922AInactive Publication Date: 2010-08-18BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2010-08-18
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

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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Description

technical field

[0001] The invention relates to an intelligent detection method for film types, which belongs to the comprehensive field of the technical field of the film processing and printing industry of film and television, the field of automatic monitoring, the field of distributed control (DCS) and the field of electronics. Background technique

[0002] During the developing process of film and television film, under the traction of the main motor on the film processor, the emulsion layer of the raw film (copy film) reacts with the chemical liquid to complete the transformation from copy film to photographic film. However, when the film is running, a small amount of liquid medicine is taken away. In order to maintain the stability of the chemical composition of the liquid medicine to ensure the quality of the film, new liquid medicine must be properly replenished. The tractor is the intermediary between each film, and there is no need to replenish the liquid medicine....

Claims

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