Apparatus for determining angular position of a motor vehicle steering wheel
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01B-007/30
B62D-015/02
G01D-005/249
출원번호
US-0553526
(1995-10-23)
우선권정보
DE-4409892 (1994-03-23)
국제출원번호
PCT/DE95/00343
(1995-03-14)
§371/§102 date
19951023
(19951023)
국제공개번호
WO-9525660
(1995-09-28)
발명자
/ 주소
Kaiser Harry (Weberstrasse 37 D-71706 Markgroningen DEX) Abendroth Manfred (Strombergstrasse 9/1 D-71672 Marbach DEX)
인용정보
피인용 횟수 :
29인용 특허 :
0
초록▼
The apparatus for determination of absolute angular position of a steering wheel (w) rotatable through several revolutions includes a fine code disk(2) nonrotatably attached to the steering column (c) and provided with circumferentially distributed code elements (2′,2″, 2′″, . . . ) and circumferent
The apparatus for determination of absolute angular position of a steering wheel (w) rotatable through several revolutions includes a fine code disk(2) nonrotatably attached to the steering column (c) and provided with circumferentially distributed code elements (2′,2″, 2′″, . . . ) and circumferentially distributed code element sensors (5) for sensing the code elements (2″, 2″, 2″′, . . . ) to generate fine signals which repeat after each revolution of the steering wheel and are indicative of a relative steering wheel angular position during each revolution; and a coarse code disk (7) provided with at least three code tracks (A,B,C, . . . ) and at least three code track sensors (8a, 8b, 8c , . . . ) for sensing respective code tracks (A,B,C, . . . ) to generate a progressive 3-bit coded signal indicative of the absolute steering wheel angular position over the several revolutions. The apparatus also includes a gear device (11,7′) for rotatably driving the coarse code disk (7) with the fine code disk(2) having a predetermined gear reduction ratio and a microcontroller (13) for logically combining and evaluating the coarse and fine signals to determine the absolute steering wheel angular position, so that the absolute steering wheel angular position can be determined with a precision according to the finer angular tolerances of the device for generating the fine signals.
대표청구항▼
An apparatus for determination of absolute angular position of a motor vehicle steering wheel (w) and steering column (c) attached to said steering wheel, said steering wheel and said steering column being rotatable through a plurality of revolutions, said apparatus comprising means for generating f
An apparatus for determination of absolute angular position of a motor vehicle steering wheel (w) and steering column (c) attached to said steering wheel, said steering wheel and said steering column being rotatable through a plurality of revolutions, said apparatus comprising means for generating fine signals indicative of a relative angular position of said steering wheel during each of said revolutions, said means for generating said fine signals comprising a fine code disk (2) nonrotatably attached to said steering column and provided with circumferentially distributed code elements (2′,2″, 2″′, . . . ) and a plurality (n) of circumferentially distributed code element sensor means (5) for sensing said code elements (2′,2″, 2″′, . . . ) and for generating said fine signals so that said fine signals repeat after each revolution of said steering column; and means for generating coarse signals indicative of an absolute angular position of said steering wheel and said steering column over the entire plurality of said revolutions thereof, said means for generating coarse signals comprising a coarse code disk (7) provided with at least three code tracks (A,B,C, . . . ) spaced from each other on said coarse code disk (7) and at least three code track sensor means (8a, 8b, 8c , . . . ) for sensing respective ones of said at least three code tracks (A,B,C, . . . ) and for generating a 3-bit coded signal indicative of said absolute angular position of the steering wheel over said plurality of said revolutions; gear means (11,7′) for rotatably driving said coarse code disk (7) with said fine code disk(2), said gear means (11,7′) connecting said fine code disk and said coarse code disk to drive said coarse code disk with a predetermined gear reduction ratio, whereby an angular resolution of said means for generating the coarse signals is lower than an angular resolution of said means for generating the fine signals; and means for logically combining and evaluating said coarse signals and said fine signals to determine said absolute angular position of said steering wheel and said steering column, said means comprising a microcontroller (13), so that said absolute angular position of said steering wheel can be determined with a precision according to the higher angular resolution of said means for generating said fine signals.
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이 특허를 인용한 특허 (29)
Santos, A. John, Absolute position hall string sensor.
Seger,Eric; Burandt,Wesley; Steuer,Andrew; Frederick,Gary L., Contactless angular position sensor and method for sensing angular position of a rotatable shaft.
Glemser, Andreas; Jochum, Herbert; Schauer, Lothar; Serr, Helmut, Method for determining the angular position of a rotative part which performs a rotational movement.
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