Automatic shading adjustment device and control method thereof

Abstract

The invention discloses an automatic shading adjustment device and a control method of the automatic shading adjustment device. The automatic shading adjustment device and the control method of the automatic shading adjustment device solve the problem that a sensor is prone to performance degradation and damage when a CCD camera is directly irradiated by redundant intensive light. A pattern displacement sensor main scale is arranged between a first shading rack and a second shading rack and arranged above a stepping motor, a pattern displacement sensor reading head is arranged at one end of the pattern displacement sensor main scale, and the pattern displacement sensor reading head is connected with a second shading block. A pattern displacement sensor feeds back the size of a light gap to a computer, the computer uses a controller for controlling the stepping motor to drive a gear and double rack linkage mechanism composed of an intermediate gear and the shading racks, the shading racks use shading blocks for driving shading cloth to realize shading, shading width is adjusted in real time by changing a pulse signal or automatically adjusted according to negative film width entered in the computer, and therefore the width of the light gap is made consistent with that of a negative film.

Description

technical field [0001] The invention relates to an adjusting device, in particular to an automatic shading adjusting device and a control method thereof. Background technique [0002] When the industrial radiographic film digitizer detects and digitizes films of different specifications, the width of the light slit must match the width of the film at the time of collection, and the adjustment accuracy of the light slit directly affects the quality of the digitized image. When the width of the light slit is lower than the width of the film, the collected light at the edge of the film will be blocked, and the image will have black edges; Blurred; and excess light directly irradiating the CCD camera is prone to sensor performance attenuation and damage. Existing devices have not solved these problems well. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies, provide an automatic shading adjustment device an...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies, provide an automatic shading adjustment device and its control method, solve the problems of sensor performance attenuation and damage that are likely to occur when redundant strong light directly irradiates the CCD camera, and further improve the digitalization of industrial radiation detection films image quality

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