SENSOR USING ELECTRO ACTIVE CURVED HELIX OR DOUBLE HELIX
摘要
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.
申请公布号
WO02103294(A1)
申请公布日期
2002.12.27
申请号
WO2002GB02781
申请日期
2002.06.19
申请人
1... LIMITED;GARETH, MCKEVITT;HOOLEY, ANTHONY;PEARCE, DAVID, HENRY;LENEL, URSULA, RUTH;SHEPHERD, MARK, RICHARD
发明人
GARETH, MCKEVITT;HOOLEY, ANTHONY;PEARCE, DAVID, HENRY;LENEL, URSULA, RUTH;SHEPHERD, MARK, RICHARD