Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object
Patent
1998-10-19
2000-10-10
Hofsass, Jeffery A.
Communications: electrical
Land vehicle alarms or indicators
Of collision or contact with external object
340904, 342 70, B60Q 100
Patent
active
06130607&
ABSTRACT:
A protection sensor for a lawn vehicle includes a substantially unidirectional antenna operatively coupled to a Doppler detection circuit. The Doppler detection circuit generates a radio frequency signal which is radiated by the antenna. When the radiated signal strikes an object, such as a person, animal or another moving lawn vehicle, within a predefined detection region of the sensor, the signal is reflected and received by the antenna. The Doppler detection circuit generates an output signal responsive to a difference in frequency between the radiated signal and the reflected signal, thereby indicating the presence of the moving object within the protection region of the sensor. The unidirectional antenna virtually eliminates false detections generated by the lawn vehicle, to which the sensor is mounted, or by the operator of the vehicle.
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McClanahan David L.
Pahl Birger
Zuercher Joseph C.
Eaton Corporation
Hofsass Jeffery A.
Tweel , Jr. John
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