Short driveway vehicle motion detector

Details Short driveway vehicle motion detector Short driveway vehicle motion detector

2006-03-31

2008-03-18

Lee, Benjamin C. (Department: 2612)

Communications: electrical

Vehicle detectors

C340S941000, C324S207200

Reexamination Certificate

active

07345595

ABSTRACT:
The apparatus is a vehicle motion detection apparatus for short driveways which uses passive ferromagnetic detecting coils reacting to the fluctuation in the earth's magnetic field caused by moving vehicles. The preferred embodiment of the invention uses two sensor coils located on a line that is approximately perpendicular to the adjacent road and parallel to the driveway. The sensor coils are designed and connected so that they generate signals of opposite polarity so that together they cancel out the signals generated by vehicles on the road, but the signals generated by a vehicle moving on the driveway do not cancel each other and are electronically processed.

REFERENCES:
patent: 3237155 (1966-02-01), Brockett
patent: 3582932 (1971-06-01), Chapman
patent: 3609679 (1971-09-01), Updegraff et al.
patent: 3745450 (1973-07-01), Wilt
patent: 3775742 (1973-11-01), Koerner et al.
patent: 4079322 (1978-03-01), Lawrence et al.
patent: 4449115 (1984-05-01), Koerner
patent: 4920340 (1990-04-01), Mizuno
patent: 4968979 (1990-11-01), Mizuno et al.
patent: 5426363 (1995-06-01), Akagi et al.
patent: 5455768 (1995-10-01), Johnson et al.
patent: 5868360 (1999-02-01), Bader et al.
patent: 5877706 (1999-03-01), Summersgill
patent: 6166660 (2000-12-01), Grenier
patent: 6816086 (2004-11-01), Kieffer, Sr.
patent: 6870488 (2005-03-01), Compton
patent: 7071840 (2006-07-01), Allen et al.

Affiliated with

Also associated with

Rating

Short driveway vehicle motion detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Short driveway vehicle motion detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Short driveway vehicle motion detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3960330