| 摘要 |
PROBLEM TO BE SOLVED: To provide a system of determining abnormality of a game ball sensor, which is capable of surely detecting a radio wave which causes the abnormality in the game ball sensor which is an abnormality determination object, mounting a function for determining the abnormality of the game ball sensor in a space saving manner, and being achieved at a low cost. SOLUTION: The sensor part of an acquired ball sensor unit 220 provided in an acquired ball counter 210 of a ball lending device 200 is defined as the game ball sensor of the abnormality determination object, a sensor 240 for determination is arranged near it, a game ball is put into a ball detection hole of the sensor 240 for the determination, and the signal of a game ball detection state is outputted from the sensor 240 for the determination to a lending device control circuit 230 at all times. When the signal from the sensor 240 for the determination becomes a game ball non-detection state, the lending device control circuit 230 determines that the acquired ball sensor unit 220 is in the state incapable of performing an appropriate ball detecting operation. COPYRIGHT: (C)2011,JPO&INPIT
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