Patent ID: 8390449
Filing Date: 2013-03-05
Classification: G08B

Abstract:
1. An intrusion detection system comprising a first sensor device and a second sensor device, in which: the first sensor device includes a first transmission circuit unit that transmits a modulation wave of a first transmission spectrum diffusion signal to a first transmission leakage transfer passage, and a first reception circuit unit that receives the modulation wave of the first transmission spectrum diffusion signal having leaked from the first transmission leakage transfer passage to a first reception leakage transfer passage so as to detect an intrusion of an object to be detected into an area subject to monitoring for an intrusion of an object to be detected on the basis of the received modulation wave; and the second sensor device includes a second transmission circuit unit that transmits a modulation wave of a second transmission spectrum diffusion signal to a second transmission leakage transfer passage, and a second reception circuit unit that receives the modulation wave of the second transmission spectrum diffusion signal having leaked from the second transmission leakage transfer passage to a second reception leakage transfer passage so as to detect an intrusion of an object to be detected into an area subject to monitoring for an intrusion of an object to be detected on the basis of the received modulation wave, wherein a signal interval of the first transmission spectrum diffusion signal is the same as a signal interval of the second transmission spectrum diffusion signal, and wherein the first transmission spectrum diffusion signal and the second transmission spectrum diffusion signal are shifted in frequency so that the first transmission spectrum diffusion signal does not overlap with the second transmission spectrum diffusion signal.