[특허]Variable reluctance sensor interface using a differential input and digital adaptive control

Variable reluctance sensor interface using a differential input and digital adaptive control 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01P-003/48 H03K-005/08
출원번호	US-0200099 (1994-02-22)
발명자 / 주소	Good Brian K. (Greentown IN) Keyse Mark R. (Sharpsville IN)
출원인 / 주소	Delco Electronics Corporation (Kokomo IN 02)
인용정보	피인용 횟수 : 41 인용 특허 : 0

초록 ▼

In accordance with the teachings of the present invention, an adaptive threshold circuit is provided which develops a series of square-wave voltage pulses from an alternating differential voltage that is produced in response to the rotation of a wheel. The adaptive threshold circuit includes an input circuit for providing an input voltage in response to the alternating differential voltage. A first voltage comparator compares the input voltage with an adaptive analog threshold voltage and produces an output in response thereto which causes a rising edge of the square-wave voltage pulse. A second voltage comparator compares a selected portion of the input voltage with the adaptive analog threshold voltage and produces an output in response thereto. The adaptive threshold circuit further includes a binary counter having a reset input for receiving the first voltage comparator output and an enable input for receiving the second voltage comparator output and provides a plurality of binary outputs. The second voltage comparator output thereby enables the counter so as to detect a peak input voltage. A digital-to-analog converter receives the binary outputs from the binary counter and generates the adaptive analog threshold voltage as a function of a selected percent of peak voltage.

대표청구항 ▼

An apparatus for developing a series of square-wave voltage pulses that are developed during rotation of a rotatable wheel comprising: a magnetic sensor associated with said wheel having a pick-up coil and means on said wheel for causing an alternating differential voltage to be generated in said pick-up coil when said wheel rotates relative to said sensor; an adaptive loading circuit coupled to said sensor for providing an adaptively controlled input voltage in response to said differential voltage; a first voltage comparator for comparing said input voltage with an adaptive analog threshold voltage and producing an output which provides a rising edge for the square-wave voltage pulse; a second voltage comparator for comparing a selected portion of said input voltage with said adaptive analog threshold voltage and producing an output; a binary counter having a reset input for receiving said first voltage comparator output and an enable input for receiving said second voltage comparator output and a plurality of binary outputs, wherein said second voltage comparator output enables the counter so as to generate a count magnitude which is a function of peak input voltage; and a digital-to-analog converter for receiving the binary outputs from said binary counter and generating said adaptive analog threshold voltage as a function of a selected percent of peak voltage.

이 특허를 인용한 특허 (41)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Variable reluctance sensor interface using a differential input and digital adaptive control 원문보기

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Variable reluctance sensor interface using a differential input and digital adaptive control 원문보기

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