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1. (WO1998050795) SENSOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/050795 International Application No.: PCT/SE1998/000817
Publication Date: 12.11.1998 International Filing Date: 04.05.1998
Chapter 2 Demand Filed: 30.11.1998
IPC:
G01P 15/09 (2006.01)
G PHYSICS
01
MEASURING; TESTING
P
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
15
Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
02
by making use of inertia forces
08
with conversion into electric or magnetic values
09
by piezo-electric pick-up
Applicants:
PACESETTER AB [SE/SE]; S-175 84 Järfälla, SE (AllExceptUS)
NILSSON, Kenth [SE/SE]; SE (UsOnly)
NILSSON, Eva [SE/SE]; SE (UsOnly)
Inventors:
NILSSON, Kenth; SE
NILSSON, Eva; SE
Agent:
PACESETTER AB; Patent Dept. Attn: KALLING, Sven S-175 84 Järfälla, SE
Priority Data:
9701721-407.05.1997SE
Title (EN) SENSOR
(FR) DETECTEUR
Abstract:
(EN) The invention relates to an accelerometer including a cantilevered beam (1) with a free end, said beam comprising at least a piezoelectric layer (2) and at least a supporting layer (3). The ratio of the thickness t1 of the piezoelectric layer relative to the thickness t2 of the supporting layer is in the range 2-4. The ratio of the modulus of elasticity for the supporting material relative to the modulus of elasticity of the piezoelectric material is in the range 8-12.
(FR) L'invention concerne un accéléromètre comprenant une poutre en porte-à-faux (1) présentant une extrémité libre et comprenant au moins une couche piézoélectrique (2) et au moins une couche support (3). Le rapport entre l'épaisseur t1 de la couche piézoélectrique et l'épaisseur t2 de la couche support est de l'ordre de 2-4. Le rapport entre le module d'élasticité du matériau support et celui du matériau piézoélectrique est de l'ordre de 8-12.
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Designated States: JP, US
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0981754US6252335