Microwave sensor for object detection based on reflected...

Details Microwave sensor for object detection based on reflected... Microwave sensor for object detection based on reflected...

2007-01-23

2007-01-23

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C342S028000, C340S554000

Reexamination Certificate

active

11176183

ABSTRACT:
A microwave sensor transmits a plurality of microwaves of different frequencies toward a detection area and carries out an object detection operation based on reflected waves of the microwaves from an object present in the detection area. The microwave sensor includes a distance identification section for obtaining a relative distance to the object in the detection area, a movement-distance identification section for obtaining a movement distance per unit of time of the object in the detection area, and an object determination section that receives output from the distance identification section and the movement-distance identification section and carries out an operation for determining object detection by setting the movement distance value per unit of time, which is a threshold for determining object detection, smaller for longer relative distances to the object in the detection area.

REFERENCES:
patent: 6380882 (2002-04-01), Hegnauer
patent: 6677887 (2004-01-01), Harman
patent: 6842113 (2005-01-01), Tsuji
patent: 6859164 (2005-02-01), Kurita et al.
patent: 6922059 (2005-07-01), Zank et al.

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