| 摘要 |
PROBLEM TO BE SOLVED: To prevent erroneous detection caused by a magnetic force arising from an electric accessory made to operate by excitation control, and also to discriminate a true wrongful act without being restricted by a structure, e.g. by a mounting position of a magnetic sensor.SOLUTION: A wrongdoing monitoring control part 204 which makes it unnecessary to consider the relative positional relation of a driving source generating a magnetic force of an electric accessory with a magnetic force detection area Amag of a magnetic sensor 202C and avoids an erroneous output of an abnormality signal caused by the operation of the driving source is constructed. While the monitoring of magnetism by the magnetic sensor 202C or the like is canceled in the wrongdoing monitoring control part 204, the winning number of game balls PB is counted, and when a wrongful winning number (e.g. a 30-percent increase) more than a predetermined number is counted, this is recognized as a matter of wrongdoing suspicion and the abnormality signal is sent out irrespective of the determination of the wrongdoing monitoring control part 204. Thus, a wrongful act can be prevented. |
