Devices and method for detecting the position and the weight of a person
First Claim
1. A device for detecting the position and the weight of a person, comprising:
- at least one transceiver for electromagnetic signals;
at least one sensor reflector disposed to enable detection of a presence and a position of the person, said sensor reflector having an antenna for reflecting a transmitting signal from said transceiver as a sensor reflector signal;
a weight-dependent changeable electrical load device associated with said sensor reflector and disposed to detect weight information about the person;
said antenna of said sensor reflector being linked to said electrical load device and configured to superimpose on the sensor reflector signal of said sensor reflector weight information about the person detected by said load device;
an evaluation unit connected to said transceiver and being configured to evaluate the weight information of the person; and
said at least one sensor reflector having an oscillator configured to oscillate at a weight-dependent oscillating frequency, thereby changing the load depending on the weight acting thereon.
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Accused Products
Abstract
The position and the weight of a person, in particular a person on a motor vehicle seat, is determined. Reflectors are used to reflect electromagnetic radiation from a transceiver. The attenuation of the sensor reflector radiation enables a report on the seat position of a person in the radiation path. An antenna of each sensor reflector is connected to an electrical load assigned thereto, which is dependent on the weight of the person acting upon it. Depending on this weight, weight information about the person is superimposed by the load onto the reflected sensor reflector signal. The reflected sensor reflector signal is received by the transceiver and fed to the evaluation unit after a signal pre-processing, which enables the weight information of the person to be evaluated.
17 Citations
12 Claims
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1. A device for detecting the position and the weight of a person, comprising:
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at least one transceiver for electromagnetic signals; at least one sensor reflector disposed to enable detection of a presence and a position of the person, said sensor reflector having an antenna for reflecting a transmitting signal from said transceiver as a sensor reflector signal; a weight-dependent changeable electrical load device associated with said sensor reflector and disposed to detect weight information about the person; said antenna of said sensor reflector being linked to said electrical load device and configured to superimpose on the sensor reflector signal of said sensor reflector weight information about the person detected by said load device; an evaluation unit connected to said transceiver and being configured to evaluate the weight information of the person; and said at least one sensor reflector having an oscillator configured to oscillate at a weight-dependent oscillating frequency, thereby changing the load depending on the weight acting thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensor reflector for detecting a weight of a person, comprising:
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an antenna configured to reflect a high-freguency transmitting signal of a transceiver as a sensor reflector signal; an electrical load device connected to said antenna, said load device having a weight-dependent changeable load value; an oscillator configured to oscillate at a weight-dependent oscillating freguency, thereby changing the load depending on the weight acting thereon; and said antenna being configured to transmit the sensor reflector signal with the output signal of said load device containing weight information about the person superimposed on the reflector signal. - View Dependent Claims (12)
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Specification