Title:
PEDAL FORCE SENSOR AND ELECTRICALLY-ASSISTED VEHICLE USING SAME
Document Type and Number:
WIPO Patent Application WO/2012/002169
Kind Code:
A1
Abstract:
Provided is a pedal force sensor which, in pedal force detection utilising an elastic body, can detect pedal force over a wide range and reduce detection errors originating from variation in the attachment position or length etc. of the elastic body. Linkage between a drive wheel (30) that is fixed to a crankshaft (14) and a sprocket (50) that transmits rotary force of the crankshaft (14) to a propelling vehicle wheel is effected by a plurality of springs (80 to 90), and furthermore the space between each spring (80 to 90) and compression means thereof is set in such a way that the compression commencement timings of the plurality of springs (80 to 90) are offset. When detecting pedal force from the phase difference of the drive wheel (30) and the sprocket (50), the number of springs that are utilised changes in accordance with the range of the phase difference. In other words, since the spring constant that is utilised differs in accordance with the range of the phase difference, the pedal force can be detected on the basis of this changing spring constant. As a result, the relationship between the amount of displacement and the pedal force is made to be nonlinear, and a pedal force sensor (10) is thereby obtained that is approximated to the desired detection characteristics.
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Inventors:
HOSAKSA, Yasuo (LTD. 16-20 Ueno 6-chome, Taito-k, Tokyo 05, 〒1100005, JP)
保坂 康夫 (〒05 東京都台東区上野６丁目１６番２０号 太陽誘電株式会社内 Tokyo, 〒1100005, JP)
SAKURAI, Tatsuya (LTD. 16-20 Ueno 6-chome, Taito-k, Tokyo 05, 〒1100005, JP)
保坂 康夫 (〒05 東京都台東区上野６丁目１６番２０号 太陽誘電株式会社内 Tokyo, 〒1100005, JP)
SAKURAI, Tatsuya (LTD. 16-20 Ueno 6-chome, Taito-k, Tokyo 05, 〒1100005, JP)
Application Number:
JP2011/063871
Publication Date:
January 05, 2012
Filing Date:
June 17, 2011
Export Citation:
Assignee:
TAIYO YUDEN CO.,LTD. (16-20, Ueno 6-chome Taito-k, Tokyo 05, 〒1100005, JP)
太陽誘電株式会社 (〒05 東京都台東区上野６丁目１６番２０号 Tokyo, 〒1100005, JP)
HOSAKSA, Yasuo (LTD. 16-20 Ueno 6-chome, Taito-k, Tokyo 05, 〒1100005, JP)
保坂 康夫 (〒05 東京都台東区上野６丁目１６番２０号 太陽誘電株式会社内 Tokyo, 〒1100005, JP)
太陽誘電株式会社 (〒05 東京都台東区上野６丁目１６番２０号 Tokyo, 〒1100005, JP)
HOSAKSA, Yasuo (LTD. 16-20 Ueno 6-chome, Taito-k, Tokyo 05, 〒1100005, JP)
保坂 康夫 (〒05 東京都台東区上野６丁目１６番２０号 太陽誘電株式会社内 Tokyo, 〒1100005, JP)
International Classes:
G01L5/22; B62M6/40; G01L3/14
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