Nondestructive total constant value testing method for coin type objects and special testing device

A measurement method and a non-destructive technology, applied in the field of counterfeit measurement, can solve problems such as troublesome steps and adverse effects on measurement accuracy

Active Publication Date: 2008-08-27
CHINA BANKNOTE PRINTING & MINTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such indirect measurements are not only cumbersome, but also have a negative impact on measurement accuracy due to conversion errors

Method used

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  • Nondestructive total constant value testing method for coin type objects and special testing device

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Embodiment

[0016] The special measuring instrument for non-damaged integral fixed value measurement of coin objects of this embodiment is shown in Figure 1. It is fixed on the right bracket 2 of the bottom plate 1 and fixedly supports the right locking member 8. The locking member is made with a central step circular concave hole. , An upward air outlet 7 and a downward liquid injection hole 14 are formed near the large-diameter opening end of the round concave hole. The right electrode 10 with a T-shaped cross section is inserted into the central circular concave hole of the locking member 8. The outer circle of the large end of the right electrode is equal to the outer circle of the coin-like object, which matches the inner circle of the large end of the central circular concave hole of the locking member 8. The sealing ring 4 is embedded in the periphery, and its end face is at the opening of the large end of the central circular concave hole of the locking member A liquid injection cavit...

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PUM

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Abstract

Present invention relates to a coin like physical parameter definite value measuring method and special survey meter for realizing method. Said method includes sealing coin like object periphery in insulator, respectively on coin like two ends surface establishing sealed liquid filling cavity, leading conduct liquid in liquid filling cavity and switching-on electrode, measuring two electrodes electricity physical parameter, proceeding geometry operating to above measured electricity physical parameter and conduct liquid electricity physical parameter to obtain result. Said invention can ensure conduct liquid and coin like objective two ends surface contact and provides accuracy simple measuring method to identify coin like object.

Description

Technical field [0001] The invention relates to a method for measuring the physical parameters of coin objects, and also to a special measuring instrument for realizing the method, and belongs to the technical field of counterfeiting measurement. Background technique [0002] As far as the applicant understands, the non-destructive and overall accurate measurement of physical parameters such as the resistance value of the coin is an important and effective method for establishing coin material and quality standards and identifying the authenticity of coins. However, due to the irregularities caused by the embossed pattern on the surface of the coin, no fixture can repeatedly and effectively guarantee the seamless and consistent contact with the coin surface, and the error caused by this incomplete contact can easily lead to electrical and physical flooding of the resistance value. Therefore, the electrical and physical parameters such as contact resistance cannot be maintained co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D5/08
Inventor 黄来友章军顾军龚士良徐峰徐岷李发强
Owner CHINA BANKNOTE PRINTING & MINTING
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