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Patent Searching and Data


Title:
PASSIVE SENSOR WITH WIRELESS TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2005102151
Kind Code:
A3
Abstract:
A sensor (10) is disclosed, which uses a transmission principle beyond RF-signals and which sensor doesn't need an electrical circuitry. The principle is based on indication means, which built by a contrast interface (32) contrasting two mediums and which contrast interface is readable by sound or radiation. Advantageous embodiments of the present inven­tion include an amplification system via micro channels (20) or a micro gear, which transform a change of length with a very high accuracy and resolution. In a further embodiment a compensation of temperature does not influence the measurement of a force.

Inventors:
HIEROLD CHRISTOFER (CH)
WENDLANDT MICHAEL ERIC (CH)
UMBRECHT FLORIAN (CH)
Application Number:
PCT/EP2005/004204
Publication Date:
December 29, 2005
Filing Date:
April 20, 2005
Export Citation:
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Assignee:
ETH ZUERICH (CH)
HIEROLD CHRISTOFER (CH)
WENDLANDT MICHAEL ERIC (CH)
UMBRECHT FLORIAN (CH)
International Classes:
A61B5/00; A61B5/103; G01L7/10; G01L7/20; (IPC1-7): A61B5/00
Foreign References:
EP1356765A12003-10-29
EP0751384A21997-01-02
DE3405086A11984-08-30
DE2310737A11974-01-10
US20030100822A12003-05-29
DE207940C
FR540719A1922-07-17
Other References:
See also references of EP 1740092A2
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