ROBBERY PREVENTING DEVICE FOR AUTOMATIC VENDING MACHINE

PURPOSE:To improve reliability by detecting the occurrence of a robbery with high accuracy. CONSTITUTION:The vibration detection signals transmitted from vibration sensors 5, 6, etc., are amplified by amplifiers 14, 15, etc., and are transmitted to a CPU 16. The CPU 16 performs a fuzzy inference for the inputted vibration detection signals, referring to the fuzzy rule and membership function stored in a memory 17 and discriminates whether the contents of the vibration detection signal is abnormal due to the robbery or not. When it is discriminated that the contents is abnormal vibration, a buzzar working signal is outputted to a transistor 18 and a buzzar 12 is made to sound, an abnormal occurrence signal is outputted to a modem (wire/radio) 21 via a driver/receiver 19 and the signal is transmitted to the outside by wire and radio.