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Title:
電気活性湾曲へリックスまたは二重ヘリックスを使用したセンサ
Document Type and Number:
Japanese Patent JP4159463
Kind Code:
B2
Abstract:
Various sensors use an electro-active device ( 11 ) electrically connected to a detector circuit. The electro-active device ( 11 ) comprises an electro-active structure in the form of a continuous electro-active member ( 12 ) curving in a helix around a minor axis ( 13 ) which is in itself curved for example in a helix around a major axis ( 14 ). On activation by relative displacement of the ends ( 16 ) of the device ( 11 ), the electro-active structure twists around the minor axis due to the fact that the minor axis ( 13 ) is curved. The continuous member ( 12 ) has a bender construction of a plurality of layers ( 21 ) and ( 22 ) including at least one layer of electro-active material so that concomitantly with the twisting the continuous member ( 12 ) bends generating an electrical signal detected by the detector circuit. The electro-active device ( 11 ) is advantageous as a sensing element in a sensor because it has a large displacement, high sensitivity and low compliance.

Inventors:
Gareth, McKevit
Holy, Anthony
Pierce, David, Henry
Rennel, Ursula, Ruth
Shepherd, Mark, Richard
Application Number:
JP2003505567A
Publication Date:
October 01, 2008
Filing Date:
June 19, 2002
Export Citation:
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Assignee:
1...Limited
International Classes:
G01D5/14; G01F23/60; B81B3/00; G01B7/00; G01C19/00; G01D5/12; G01L1/16; G01L9/08; G01P15/09; H01L41/08; H01L41/09; H01L41/113; H01L41/187; H01L41/193; H01L41/22; H01L41/33; H02N2/18; H04R17/02; H04R23/00
Domestic Patent References:
JP10122987A
JP7091955A
JP8086796A
JP48071586A
JP49098220A
JP62093623A
JP2000174353A
JP1180665U
JP60179059U
JP62146927U
JP62081506U
JP6058337U
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Toru Mori
Yutaka Yoshida