Automatic induction film starting-closing circuit of background light of film observing machine

Abstract

The invention provides an automatic induction film starting-closing circuit of background light of a film observing machine. The automatic induction film starting-closing circuit is used for the film observing machine for observing an industrial flaw detection photographing negative film. The automatic induction film starting-closing circuit is formed by a power supply circuit A, a sensor circuit B and a central processing unit circuit C with a resetting circuit, wherein an SDAO (Spark Discharging Anode Oxidization) end and an SCLO end of a communication bus of the sensor circuit B are connected; an SDAO end and an SCLO end of a central processing unit (66) of the central processing unit circuit C with the resetting circuit are connected; and a power supply output end (48) of the power supply circuit A is connected with an input end (4) pin of the central processing unit circuit C. According to the film observing machine disclosed by the invention, on the basis of keeping the technical performance and the technical index of the previous film observing machine, once a user moves the negative film from an observing screen, the background light can be closed along with the movement of the negative film, so that an energy source can be effectively saved, the service life loss of a component is reduced and eyes of the user are not stimulated; and therefore, the automatic induction film starting-closing circuit can meet urgent requirements and has a wide technology application value.

Description

technical field [0001] The utility model relates to an automatic sensing film opening and closing circuit for the background light of the viewing machine used for viewing the industrial flaw detection photographic film viewing machine. Background technique [0002] Industrial flaw detection operations often require viewing standard photographic negatives taken after flaw detection. Need to use the film viewer with background light when viewing above-mentioned photographic film. [0003] Although the known technology film viewer can basically meet the film viewing requirements, when the film is removed after watching the film, the background light remains illuminated, which not only consumes electricity, consumes the service life of components, but also stimulates the eyes of the user, which is not conducive to The user's eye health does not meet the requirements of modern society for various production and life energy saving, low carbon and health. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0003] Although the known technology film viewer can basically meet the film viewing requirements, when the film is removed after watching the film, the background light remains illuminated, which not only consumes electricity, consumes the service life of components, but also stimulates the eyes of the user, which is not conducive to The user's eye health does not meet the requirements of modern society for various production and life energy saving, low carbon and health

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