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Browse Prior Art Database

Coin Recognition Device

IP.com Disclosure Number: IPCOM000034687D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Imai, Y: AUTHOR [+2]

Abstract

Disclosed is a device for recognizing the denomination of coins by an optical sensor for sensing a central perforation and the length of specific portions of a coin in combination with a magnetic sensor for sensing the material of the coin. There are six kinds of denominations of coins being used or circulated in Japan: 1-yen, 5-yen, 10-yen, 50-yen, 100-yen and 500-yen. It is possible for the current magnetic sensor to recognize or distinguish between all kinds of the coins except 50-yen and 100-yen coins which have similar magnetic characteristics. For recognizing a 50-yen coin having a perforation and a 100-yen coin having no perforation, the central perforation of the coin and the length of its specified portions A and B (see Fig. 1) are sensed by an optical sensor shown in Fig.

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Coin Recognition Device

Disclosed is a device for recognizing the denomination of coins by an optical sensor for sensing a central perforation and the length of specific portions of a coin in combination with a magnetic sensor for sensing the material of the coin. There are six kinds of denominations of coins being used or circulated in Japan: 1-yen, 5-yen, 10-yen, 50-yen, 100-yen and 500-yen. It is possible for the current magnetic sensor to recognize or distinguish between all kinds of the coins except 50-yen and 100-yen coins which have similar magnetic characteristics. For recognizing a 50-yen coin having a perforation and a 100-yen coin having no perforation, the central perforation of the coin and the length of its specified portions A and B (see Fig. 1) are sensed by an optical sensor shown in Fig. 2, which is provided in the coin handling unit shown in Fig. 3. With the combination of the sensing results of the magnetic sensor and the optical sensor, the coin is recognized as follows: A. When the magnetic sensor recognizes the coin as being for 100-yen (a) if the perforation is not sensed and the length of portion B is the same as a predetermined length corresponding to the diameter of the 100-yen coin, it is recognized as the 100-yen coin.

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(b) if the perforation is not sensed and the length of portion B is less than the predetermined length, the coin is rejected as unrecognizable since there is a possibility of missing the perforation in s...