| 摘要 |
A system for detection of fraud upon a coin or token accepting device is disclosed. In one embodiment the system operates in a coin path, the coin path being configured to accept and direct a coin. Prior to credit being provided for a coin or other item of value, the system detects and analyzes behavior of objects in the coin path. In one embodiment, one or more emitter/detector pairs are located in the coin path. The emitters transmit a form of energy across the coin path for detection by a detector. A fraud perpetration device in the coin path can be detected by the emitter/detector pairs. The emitter/detector pairs may utilize complex signal schemes, such as signal modulation, random signaling generation, velocity, acceleration, displacement, coin material physics, and the like to detect fraud.
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