An Improved Device of Detecting True and False Coin

Chun He Yu; Xiao Feng Tian; Dan Ping Zhang

doi:10.4028/www.scientific.net/AMR.503-504.1589

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 503-504An Improved Device of Detecting True and False...

An Improved Device of Detecting True and False Coin

Abstract:

In order to reduce the loss of an automatic coin machine for using a 1-Yuan false coin, an improved device is designed by applying the eddy current nondestructive testing technology, which uses two distinct frequency signals to detect the information of coin. The device includes four modules: two LC oscillating circuits, signal processing module, microprocessor module and external control circuits. The detection algorithm selects two counting values under two distinct frequency signals. The low frequency circuit detects the information of the coin material, and the high frequency circuit detects the feature of the coin surface. The detection region of true coin is decided by the method of least square. The experiment shows that the device has the characters of stability, reliability and high accuracy.

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Periodical:

Advanced Materials Research (Volumes 503-504)

Pages:

1589-1592

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.503-504.1589

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Online since:

April 2012

Authors:

Chun He Yu, Xiao Feng Tian, Dan Ping Zhang

Keywords:

Coin Detection, Eddy Current Detection, False Coin, Method of Least Square

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