A method and device for monitoring a sheet area

Abstract

Embodiments of the present invention provide a method and equipment for monitoring a region of a sheet, the method comprising: obtaining the reflected voltage V1 of the optical signal of the first reflected light reflected by the first detection area of ​​the sheet; obtaining the second detection of the sheet The reflected voltage V2 of the optical signal of the second reflected light reflected by the area; according to the obtained voltages V2 and V1, calculate the relative reflectance k=V2 / V1, and combine the calculated relative reflectance k with a Comparing the threshold kt; when the k is greater than the kt, determine that the area to be confirmed is any surface of the transparent part or determine that the area to be confirmed is a smooth surface of the incompletely transparent part; when the k When it is less than or equal to the kt, it is determined that the area to be confirmed is the frosted surface or the coated surface of the opaque part. The embodiments of the present invention may not limit the type of the monitored sheet, reduce the influence of different refractive indices on the detection result of the frosted surface, and reduce the influence of environmental factors and sensors on the detection result.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and equipment for monitoring the region of a sheet. Background technique [0002] The process of preparing blood smears by the automatic slide pusher includes slide loading, information printing, blood dripping, and slide pushing. After the slides are pushed out from the slide box, they are transported to the print head along the track for information printing. After that, the blood sample is dropped on the glass slide and pushed out of the blood film. [0003] At present, most of the glass slides used as blood smears only have a small area on one side of the head that can be used for printing because it is frosted, and the other areas are smooth glass surfaces. When the print head prints information on these smooth areas , the pattern or writing is easy to fall off, resulting in missing or even wrong blood smear information. Therefore, in order to ensure the accur...

AI Technical Summary

Problems solved by technology

The specific method is: directly compare the voltage of the reflected signal of the area to be confirmed with a fixed threshold, if the voltage of the reflected signal is less than or equal to the fixed threshold, it means that the area to be confirmed is a frosted surface, if it is greater than the fixed threshold The threshold value indicates that the area to be confirmed is not a frosted surface. The detection result of whether the area to be confirmed is a frosted surface obtained by such a monitoring method is heavily dependent on the refractive index, thickness of the glass slide, and the degree of frosting (opacity) of the area to be confirmed. Only specific Customized glass slides have poor compatibility and are easily affected by environmental factors and the aging of detection sensors, resulting in poor reliability.

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