An automatic shading adjustment device and its control method
A technology of an adjustment device and a control method, applied in optics, optical components, instruments, etc., can solve the problems of sensor performance attenuation, low reliability, low precision, etc., and achieve the effects of improving precision, high reliability, and improving robustness
Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problems of low precision and low reliability of the original device, and provide an automatic shading adjustment device and its control method, which solves the problem of sensor performance attenuation and damage easily caused by direct irradiation of redundant strong light on CCD cameras problems, thereby improving the quality of digital images of industrial radiographic inspection negatives
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[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] see figure 1 with figure 2 , a kind of automatic shading adjusting device that the present invention provides, comprises computer, two side plates, left and right rotation lead screw 3, two lead screw nuts, two shading blocks, two shading cloths, stepper motor 12, transmission belt 14 and Encoder 13 is driven. First of all, one end of the first shading cloth 9 and the second shading cloth 10 are respectively fixed to the two side panels, and the other ends are respectively connected to the first shading block 7 and the second shading block 8 to block excess light, and rotate left and right The rotation of the lead screw 3 drives the translation of the shading block to adjust the width of the transmitted light. Secondly, the computer drives the encoder 13 to connect the stepping motor 12, and the stepping motor 12 transmits the power to the left and right scr...
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The invention discloses an automatic shading adjustment device and a control method thereof. The device includes a stepper motor, a driving encoder, and a first side plate and a second side plate which are in parallel arrangement in vertical directions; and a nut guide shaft, left and right rotary screws and a bearing shaft are successively arranged from the bottom to the top between the two sideplates in a parallel manner. The control method includes the following steps: step one, obtaining the width value of a light gap through the driving encoder; step two, comparing the width value of thelight gap with the width value of a negative film through a computer; and step three, starting collecting until finish if the width value of the light gap accords with requirements; and adjusting thewidth of the light gap to accord with the width value of the negative film by the computer through the stepper motor if the width value of the light gap does not accord with the requirements, then starting collecting until finish. The problems of sensor performance attenuation and damages easily generated by directly radiating a CCD camera through superfluous strong light can be solved, and therefore, the quality of negative film digitized images detected by industrial rays can be enhanced.
Description
technical field [0001] The invention relates to a high-precision adjusting device, in particular to an automatic shading adjusting device and a control method thereof. Background technique [0002] When the industrial ray film digitizer digitizes the film, in order to adapt to films of different widths, the width of the light slit should also be dynamically adjusted to match the width of the film. The adjustment accuracy and reliability of the light slit directly affect 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; The image boundary is blurred; and the redundant strong light directly illuminates the CCD camera, which is easy to cause sensor performance degradation and damage. However, the existing devices have the problems of low precision and low reliability. Contents of the invention [0003] The purpose of the p...
Claims
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IPC IPC(8): G01N23/04G02B26/02
CPCG01N23/04G02B26/02
Inventor 高建民李云龙姚卫杰姜洪权王昭高智勇
Owner XI AN JIAOTONG UNIV