| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of slot machines: that, because there is no means to ensure detection of frauds such as illicitly changing a set value of jackpot probability or illicitly putting out medals, without requiring the slot machines to be remodeled, it is impossible to detect secret frauds by outsiders or employees illicitly copying a jackpot-probability setting key or the like. SOLUTION: A current sensor 1 including the clamp type is mounted to wiring 7 located outside or inside of a slot machine and a current change detecting part 2 detects changes in current. An n-bit counter 3 (n>=1) counts the number of changes, and a count value display/output part 4 either displays the count value or outputs the result to an external system such as a slot machine management system to ensure detection of frauds. |
