Patent ID: 7271722
Filing Date: 2007-09-18
Classification: G01V,G08B

Abstract:
1. A security sensor device having an optical axis adjusting capability, which device comprises: a beam projecting unit including a plurality of beam projectors for projecting respective sensing waves; a drive circuit for driving each of the beam projectors; a beam receiving unit including a plurality of beam receivers each for receiving the sensing wave projected by the respective beam projector, the security sensor device being operable to detect a human body when the sensing waves are intercepted by the human body; wherein for the adjustment of optical axis between the beam projector and the beam receiver of each pair to be performed, the beam projecting unit includes an ID code applier for applying to each of the sensing waves an ID code for specifying one of the beam projectors, and a transmission controller for controlling the drive circuit to enable the sensing waves, having the respective ID codes applied thereto, to be sequentially transmitted at predetermined intervals; and wherein the light receiving unit includes an ID code identifier for identifying the ID code applied to each of the sensing waves received thereby, a received light level detector for detecting the level of light received by each beam receiver corresponding to or identified by each of the ID codes, and a transmitter for transmitting the received light level of each beam receiver to the beam projecting unit.