Patent ID: 6288643
Filing Date: 2001-09-11
Classification: B60C,G08B

Abstract:
A method of detecting a graffiti-making act, comprising:providing a graffiti-making act detection system to detect a graffiti-making act, the graffiti-making act detection system including one or more sonic sensors to sense sound having a characteristic frequency or frequencies representative of the graffiti-making act and transmit a signal or signals in response to the sound of the graffiti-making act; and a base unit including electronics to process the signal or signals, and an alarm to indicate that a graffiti-making act has been detected;locating the one or more sonic sensors and the base unit of the graffiti-making act detection system near a structure prone to receiving graffiti;sonically sensing with said one or more sonic sensors sound having a characteristic frequency or frequencies representative of a graffiti-making act and transmitting a signal or signals in response to the sound of the graffiti-making act to the electronics;processing the signal or signals in response to the sound of the graffiti-making act with the electronics;initiating an alarm indicating that the graffiti-making act took place if the signal or signals represent a sound of a graffiti-making act.