[특허]Temperature range optimized sensor system

IEE International Electronics & Engineering S.A.

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특허 상세정보

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Temperature range optimized sensor system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01L-001/00 G08B-021/00 G01L-001/22 B60R-021/015 B60N-002/00 G01G-019/414
출원번호	US-0176248 (2014-02-10)
등록번호	US-9546920 (2017-01-17)
발명자 / 주소	Kuebler, Karl-Heinz
출원인 / 주소	IEE International Electronics & Engineering S.A.
대리인 / 주소	Reising Ethington P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 5

초록
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A sensor arrangement comprises a first sensor element for converting a physical quantity into a first electrical signal and at least a second sensor element for converting said physical quantity into a second electrical signal. The first sensor element has a first sensitivity while said second sensor element has a second sensitivity different from said first sensitivity. The first sensor element is operatively coupled between terminals of said sensor arrangement and said second sensor element is operatively connected between said terminals of said sensor arrangement via a temperature controlled switching element so that in a first state of said temperature controlled switching element, said second electrical signal combines with said first electrical signal to form a sensor output signal, and in a second state of said temperature controlled switching element, the contribution of said second electrical signal to said sensor output signal is substantially reduced with respect to a respective contribution in said first state of said temperature controlled switching element.

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1. A sensor arrangement comprising a first sensor element for converting a physical quantity into a first electrical signal, said first sensor element having a first sensitivity and said first sensor element being operatively coupled between terminals of said sensor arrangement, andat least a second sensor element for converting said physical quantity into a second electrical signal, said second sensor element having a second sensitivity different from said first sensitivity, said second sensor element being operatively connected between said terminals of said sensor arrangement via a temperature controlled switching element so that in a first state of said temperature controlled switching element, said second electrical signal combines with said first electrical signal to form a sensor output signal, and in a second state of said temperature controlled switching element, a contribution of said second electrical signal to said sensor output signal is substantially reduced with respect to a respective contribution in said first state of said temperature controlled switching element. 2. The sensor arrangement according to claim 1, wherein said second sensitivity of said second sensor element is higher than said first sensitivity of said first sensor element. 3. The sensor arrangement according to claim 1, wherein said second sensitivity of said second sensor element is lower than said first sensitivity of said first sensor element. 4. The sensor arrangement according to claim 1, wherein said temperature controlled switching element is in said first state when an environmental temperature is below a first threshold temperature and said temperature controlled switching element is in said second state when an environmental temperature is above a second threshold temperature. 5. The sensor arrangement according to claim 1, wherein said temperature controlled switching element comprises at least one of an NTC element, PTC element or thermo switch. 6. The sensor arrangement according to claim 1, wherein said first electrical signal is a resistance of said first sensor element and said second electrical signal is a resistance of said second sensor element. 7. The sensor arrangement according to claim 6, wherein in said first state, said temperature controlled switching element has a low electrical resistance andin said second state, said temperature controlled switching element has a high electrical resistance. 8. The sensor arrangement according to claim 6, wherein in said first state, said temperature controlled switching element has a high electrical resistance andin said second state, said temperature controlled switching element has a low electrical resistance. 9. The sensor arrangement according to claim 6, wherein said second sensor element is connected in series with said temperature controlled switching element between said terminals of said sensor arrangement. 10. The sensor arrangement according to claim 6, wherein said second sensor element is connected in series with said temperature controlled switching element between said terminals of said sensor arrangement. 11. The sensor arrangement according to claim 1, wherein said first sensor element and said at least one second sensor element are pressure sensors and wherein said physical quantity is a pressure acting on said first sensor element and on said at least one second sensor element. 12. An occupant sensor for a vehicle seat comprising a first pressure sensor for converting a pressure acting on said first pressure sensor into a first electrical signal, said first pressure sensor having a first sensitivity and said first pressure sensor being operatively coupled between terminals of said occupant sensor, andat least a second pressure sensor for converting a pressure acting on said second pressure sensor into a second electrical signal, said second pressure sensor having a second sensitivity different from said first sensitivity, said second pressure sensor being operatively connected between said terminals of said sensor arrangement via a temperature controlled switching element so that in a first state of said temperature controlled switching element, said second electrical signal combines with said first electrical signal to form a sensor output signal, and in a second state of said temperature controlled switching element, a contribution of said second electrical signal to said sensor output signal is substantially reduced with respect to a respective contribution in said first state of said temperature controlled switching element. 13. The occupant sensor according to claim 12, wherein said first electrical signal is a resistance of said first pressure sensor and said second electrical signal is a resistance of said second pressure sensor. 14. The occupant sensor according to claim 12, wherein said temperature controlled switching element comprises at least one of an NTC element, PTC element or thermo switch, and wherein said second pressure sensor is connected in series with said temperature controlled switching element between said terminals of said occupant sensor. 15. The occupant sensor according to claim 12, wherein said first and second pressure sensors are foil type pressure sensors. 16. The occupant sensor according to claim 12, wherein said first and second pressure sensors are arranged on or in a seating surface of a vehicle seat under a seat trim, in or at a suspension of a seat cushion, in or at a seat frame or a seat structure of a vehicle seat or in seat mounting features of a vehicle. 17. An occupant sensor for a vehicle seat comprising a first pressure sensor for converting a pressure acting on said first pressure sensor into a first electrical signal, said first pressure sensor having a first sensitivity and said first pressure sensor being operatively coupled between terminals of said occupant sensor, andat least a second pressure sensor for converting a pressure acting on said second pressure sensor into a second electrical signal, said second pressure sensor having a second sensitivity different from said first sensitivity, said second pressure sensor being operatively connected between said terminals of said sensor arrangement via a temperature controlled switching element so that in a first state of said temperature controlled switching element, said second electrical signal combines with said first electrical signal to form a sensor output signal, and in a second state of said temperature controlled switching element, a contribution of said second electrical signal to said sensor output signal is substantially reduced with respect to a respective contribution in said first state of said temperature controlled switching element;wherein said first electrical signal is a resistance of said first pressure sensor and said second electrical signal is a resistance of said second pressure sensor;wherein said temperature controlled switching element comprises at least one of an NTC element, PTC element or thermo switch, and wherein said second pressure sensor is connected in series with said temperature controlled switching element between said terminals of said occupant sensor;wherein said first and second pressure sensors are foil type pressure sensors; andwherein said first and second pressure sensors are arranged on or in a seating surface of a vehicle seat under a seat trim, in or at a suspension of a seat cushion, in or at a seat frame or a seat structure of a vehicle seat or in seat mounting features of a vehicle.

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