Vehicle seat occupant detection system with seat cushion identifying transponder
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60Q-001/00
출원번호
US-0159661
(2002-05-31)
발명자
/ 주소
Patterson, James F.
Fortune, Duane D.
Gray, Charles A.
출원인 / 주소
Delphi Technologies, Inc
대리인 / 주소
Sigler, Robert M.Chmielewsk, Stefan V.
인용정보
피인용 횟수 :
18인용 특허 :
5
초록▼
In a vehicle seat occupant detection system, a transponder in a seat cushion is responsive to an activating signal to generate an electromagnetic signal containing unique seat identification data. An occupant detection system module senses a seat characteristic and derives therefrom an occupant dete
In a vehicle seat occupant detection system, a transponder in a seat cushion is responsive to an activating signal to generate an electromagnetic signal containing unique seat identification data. An occupant detection system module senses a seat characteristic and derives therefrom an occupant detection signal. The module further generates the transponder activating signal and receives and processes the electromagnetic signal to derive the contained seat identification data. The module determines if there is seat identification data in a dedicated memory location in rewritable, non-volatile memory and, if there is, compares it to the seat identification data from the electromagnetic signal. If they do not match, the derivation of a valid occupant detection signal is prevented. If there is no seat identification data in the dedicated memory location, the module causes the seat identification data from the electromagnetic signal to be copied to the dedicated memory location if it remains unchanged for a predetermined number of transponder activations so as to allow authorized matching of a seat cushion and module.
대표청구항▼
In a vehicle seat occupant detection system, a transponder in a seat cushion is responsive to an activating signal to generate an electromagnetic signal containing unique seat identification data. An occupant detection system module senses a seat characteristic and derives therefrom an occupant dete
In a vehicle seat occupant detection system, a transponder in a seat cushion is responsive to an activating signal to generate an electromagnetic signal containing unique seat identification data. An occupant detection system module senses a seat characteristic and derives therefrom an occupant detection signal. The module further generates the transponder activating signal and receives and processes the electromagnetic signal to derive the contained seat identification data. The module determines if there is seat identification data in a dedicated memory location in rewritable, non-volatile memory and, if there is, compares it to the seat identification data from the electromagnetic signal. If they do not match, the derivation of a valid occupant detection signal is prevented. If there is no seat identification data in the dedicated memory location, the module causes the seat identification data from the electromagnetic signal to be copied to the dedicated memory location if it remains unchanged for a predetermined number of transponder activations so as to allow authorized matching of a seat cushion and module. said total inductance, said first and second inductive elements adapted to cooperate to reduce a total shunt capacitance associated with said first and second inductive elements and provide a smaller value of a real part of an impedance associated with said total inductance at a given frequency. 2. The segmented inductor circuit as recited in claim 1 wherein said first and second inductive elements have first and second intrinsic resistances, respectively. 3. The segmented inductor circuit as recited in claim 1 wherein said first and second inductive elements are substantially equal. 4. The segmented inductor circuit as recited in claim 3 wherein said total shunt capacitance is approximately half a first intrinsic shunt capacitance associated with said first inductive element or a second intrinsic shunt capacitance associated with said second inductive element. 5. The segmented inductor circuit as recited in claim 1 wherein said tuning circuit exhibits a parasitic capacitance across terminals associated therewith. 6. The segmented inductor circuit as recited in claim 1 wherein said first and second inductive elements are discrete. 7. The segmented. inductor circuit as recited in claim 1 further comprising a third inductive element, coupled in series with said second inductive element, an inductance of said first, second and third inductive elements substantially equal to said total inductance, said first, second and third inductive elements adapted to cooperate to reduce a total shunt capacitance associated with said first, second and third inductive elements. 8. The segmented inductor circuit as recited in claim 1 wherein said segmented inductor circuit is embodied in an integrated circuit. 9. A tuning circuit, comprising: a first inductive element having a first intrinsic shunt capacitance; and a second inductive element, coupled in series with said first inductive element, having a second intrinsic shunt capacitance, said first and second inductive elements configured to exhibit a total inductance and provide a smaller value of a real part of an impedance associated with said total inductance at a given frequency, and adapted to cooperate to reduce a total shunt capacitance associated with said first and second inductive elements thereby increasing a self-resonant frequency of said tuning circuit. 10. The tuning circuit as recited in claim 9 wherein said first and second inductive elements have first and second intrinsic resistances, respectively. 11. The tuning circuit as recited in claim 9 wherein said first and second inductive elements are substantially equal. 12. The tuning circuit as recited in claim 11 wherein said total shunt capacitance is approximately half said first intrinsic shunt capacitance or said second intrinsic shunt capacitance. 13. The tuning circuit as recited in claim 9 wherein said tuning circuit exhibits a parasitic capacitance across terminals associated therewith. 14. The tuning circuit as recited in claim 9 wherein said first and second inductive elements are discrete. 15. The tuning circuit as recited in claim 9 wherein said tuning circuit is employable with an oscillator. 16. The tuning circuit as recited in claim 9 wherein said tuning circuit is embodied in an integrated circuit. 17. A method of increasing a self-resonant frequency of a tuning circuit, comprising: providing a first inductive element having a first intrinsic shunt capacitance; and series coupling a second inductive element, having a second intrinsic shunt capacitance, with said first inductive element, said first and second inductive elements exhibiting a total inductance and providing a smaller value of a real part of an impedance associated with said total inductance at a given frequency, and cooperating to reduce a total shunt capacitance associated with said first and second inductive elements thereby increasing said self-resonant frequency of said tuning circuit. 18. The method as recited in claim 17 wherein
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