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Apparatus and method for detecting sheet-like material

A sheet material and image detection technology, applied in the direction of measuring devices, material analysis, and material analysis through optical means, can solve problems such as inability to inspect, inability to detect the quality of laser coding holes, and reduce the accuracy of paper defect detection, etc., to achieve Improve detection accuracy, reduce accuracy requirements, and reduce costs

Inactive Publication Date: 2005-09-21
CHINA BANKNOTE PRINTING & MINTING
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Problems solved by technology

However, it cannot detect the quality of laser coded holes. It can only detect the existence and position of watermarks and security lines, but cannot detect the integrity of the two; it cannot detect holes with a size smaller than 1mm for paper defects. The reason The reason is that the large banknotes are transported on the conveyor belt, which causes the movement of the large banknotes to be unstable and reduces the accuracy of paper defect detection

Method used

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  • Apparatus and method for detecting sheet-like material
  • Apparatus and method for detecting sheet-like material
  • Apparatus and method for detecting sheet-like material

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Embodiment Construction

[0037] The invention will now be described with reference to the accompanying drawings. figure 1 is a schematic structural diagram of the detection device 100 according to the present invention. The detection device 100 includes: a transport device 102, used to carry and transport a sheet material 103; an irradiation device 104, arranged on one side of the sheet material, for irradiating light onto the sheet material; a receiving device 106, arranged on The other side of the sheet material 103, opposite to the transmission device 102, is used to receive the light transmitted from the sheet material, and convert the received light into a corresponding detection image; the information processing device 200 is used to collect and The inspection image is processed and compared to the template to inspect the quality of the transmission image of the sheet material. The template establishment process is as follows. Before the detection, a template needs to be established. Through vi...

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Abstract

This invention provides a device and method to test slice materials, wherein, the device comprises transmission device, irradiation device, and receiving device and information process device. The transmission device is to transmit the slice materials; the irradiation device is located on one side of the slice material to irradiate the slice materials; the receiving device is located on the other side of the slice materials, comparing to the irradiation device, to receive transmission light from slice material and to convert the received light into relative test images; the information process device is to collect and process image measurement and compare the tested image and the mode board to test the transmission image quality.

Description

technical field [0001] The present invention relates to devices and methods for inspection, and more particularly to devices and methods for inspection of sheet materials. Background technique [0002] At present, in order to increase the anti-counterfeiting capabilities of sheet materials such as banknotes, securities, stamps, security papers, etc., some of these sheet materials are provided with watermarks and security threads, and some are also provided with laser code holes. With the continuous improvement of the printing process, the printing accuracy of the front and back of the sheet material (such as a banknote) is also greatly improved. In addition, paper defects are not allowed. In order to improve the anti-counterfeiting ability of the sheet material, its quality should be strictly checked, including checking the transmission quality of the sheet material. [0003] Beijing Daheng Image Vision Co., Ltd. has produced the "watermark image automatic detection system...

Claims

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Application Information

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IPC IPC(8): G01N21/898G07D7/128G07D7/181
Inventor 顾克俭周仁忠屈明生王川李乐平杨艺
Owner CHINA BANKNOTE PRINTING & MINTING
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