Microwave sensor

Details Microwave sensor Microwave sensor

2005-01-11

2005-01-11

Wu, Daniel (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S552000, C342S028000

Reexamination Certificate

active

06842113

ABSTRACT:
MW sensor1in one or more embodiments of the present invention is equipped with distance identifying means41capable of calculating relative distance(s) from the distance identifying means to object(s) at least partially within protected area(s) based on reflected wave(s); moved distance identifying means42capable of calculating moved distance(s) per unit time of object(s) at least partially within protected area(s); and object determination means43capable of receiving output(s) from distance identifying means41and moved distance identifying means42, and capable of carrying out object detection determination operations(s) such that moved-distance-per-unit-time value(s), at least one of which serves as trigger value for object detection determination, is or are set lower as relative distance(s) to object(s) at least partially within protected area(s) grow smaller. As a result, a situation may be achieved whereby object(s) is or are not determined to have been detected when plant life or the like sways due to wind at location(s) comparatively distant from MW sensor1. In contrast thereto, when human being(s) or the like approach, reaching location(s) comparatively near to MW sensor1, it is possible to achieve a situation whereby object detection is determined to have occurred even where the speed of movement thereof is small.

REFERENCES:
patent: 4225858 (1980-09-01), Cole et al.
patent: 4697184 (1987-09-01), Cheal et al.
patent: 6380882 (2002-04-01), Hegnauer
patent: 6650276 (2003-11-01), Lawless
patent: 6677887 (2004-01-01), Harman
patent: 2002-8204 (2002-01-01), None

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