Alarm system for detection of intruders, includes transmitter for outputting audible signal on sensing of object in inspected location and log information of audible signals receiver

摘要

A transmitter (1) outputs audible signal on sensing of an object in the location under inspection. A receiver picks up this signal and emits an alarm signal. The log information of audible signal output on particular data, is collected at preset time after signal transmission and sent by a log information transmitting unit (15) to the receiver as a report.