System and method for detecting the seat occupancy in a vehicle
First Claim
1. A system for detecting the seat occupancy in a vehicle, comprisingat least one microwave transmitter,reflectors which are arranged in the vehicle, andat least one microwave receiver,whereinthe at least one microwave transmitter and the reflectors are arranged so that the reflected intensity depends on the seat occupancy in the vehicle,the reflectors can be selectively activated or deactivated during defined time intervals,the reflectors can be distinguished from one another via an assignment of the reflectors to the time intervals, andthe reflectors are modulating back-scatter devices.
1 Assignment
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Accused Products
Abstract
A system for detecting the seat occupancy in a vehicle includes a microwave transmitter (10) and a plurality of small-area reflectors (12) which are arranged in the vehicle. By activating or deactivating the different reflectors (12) during different time intervals, the reflectors (12) can be identified via the unequivocal assignment between the time intervals and the reflectors. This makes it possible to use narrow-band microwave radiation, since it is then not absolutely necessary to identify the reflectors (12) with the aid of different frequencies. It is also possible to arrange receivers in the seat (20) instead of reflectors (12).
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Citations
23 Claims
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1. A system for detecting the seat occupancy in a vehicle, comprising
at least one microwave transmitter, reflectors which are arranged in the vehicle, and at least one microwave receiver, wherein the at least one microwave transmitter and the reflectors are arranged so that the reflected intensity depends on the seat occupancy in the vehicle, the reflectors can be selectively activated or deactivated during defined time intervals, the reflectors can be distinguished from one another via an assignment of the reflectors to the time intervals, and the reflectors are modulating back-scatter devices.
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13. A method for detecting a seat occupancy in a vehicle, comprising the steps of:
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arranging one or more microwave transmitters and one or more reflectors for transmitting and reflecting microwave radiation in such a way that a received intensity depends on the seat occupancy in the vehicle, transmitting microwave radiation, reflecting the microwave radiation through the reflectors which are arranged in the vehicle selectively activating or deactivating the reflectors during defined time intervals and distinguishing the reflectors from one another via an assignment of the reflectors to the time intervals, wherein the reflection takes place by means of a back-scatter process. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification