POP can opening impression residual thickness measuring device and its measuring method

A measuring device and residual thickness technology, applied in measuring devices, optical devices, instruments, etc., can solve the problems of affecting residual thickness calculation results, troublesome positioning of support points, low work efficiency, etc., and achieve reliable measurement results and long-term work stability. Good performance, convenient installation and debugging

Inactive Publication Date: 2005-07-20
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0005] When the relative measurement method is used, the thickness of the can lid is often uneven due to the stamping force when it is formed. The thickness of the can lid measured in advance is only an average value, and there is a certain difference from the actual thickness near the indentation. The calculation result of the residual thickness; when the direct m

Method used

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Example Embodiment

[0023] Hereinafter, the present invention will be further described in detail with reference to the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

[0024] figure 2 It is the system principle diagram of the relative measurement method. d 0 It is the average thickness of the can lid, and its value is determined by multi-point average in advance; Δd ​​is the depth of the indentation of the opening of the can, and its value is measured by the focusing reading microscope; the residual thickness of the indentation of the opening of the can is calculated by the following formula :

[0025] δ=d 0 -Δd (1)

[0026] image 3 It is the system principle diagram of the direct measurement method. When measuring, the zero point of the support datum is calibrated by the focusing reading microscope, and then the lid of the can is placed on the support datum, the residual thickness value δ of the opening indentation of the can can be obtained dire

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Abstract

The invention provides a measuring device for impress remaining thickness of ring-pull can opening, including two laser measurement units with automatic focusing function, installed coaxially and oppositely and situated on two sides of a detected object, where each of them is composed of laser, light splitting plate, focusing objective and focusing positioning photoelectric component, which in turn compose a light path; each measuring unit is connected with a computer though signal lines. The invention also provides a measuring method using the above measuring device. Its manufacturing cost is relatively lower, its long-term working stability is good and its measuring efficiency is high, its installation and debugging is convenient and its use and maintenance is convenient. It can be applied to the field of automatically detecting other nontransparent sheets, etc.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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