Pacesetter Ab

Eva Nilsson

Kenth A Nilsson

An accelerometer has a cantilever beam supported at one end and having an opposite free end with a longitudinal direction between the supported end and the free end, the beam being formed of a piezoelectric layer and a supporting layer. An inertial, sensing mass is mounted at the free end of the beam, and is located eccentrically relative to the longitudinal direction of the beam. The accelerometer has a primary direction of sensitivity to acceleration forces, and a secondary direction of sensitivity, which is orthogonal to the primary direction and in which the sensitivity is negligible. The secondary direction forms an angle relative to the longitudinal direction of the beam such that a line coinciding with a force proceeding through the center of gravity of the inertial mass, and which is directed in the secondary direction, also intersects the beam.

Beam-type accelerometer

An accelerometer has a cantilevered beam supported at one end and having an opposite free end, with an inertial, sensing mass mounted at the free end of the beam. The beam is formed of a piezoelectric layer and a supporting layer. The ratio of the thickness of the piezoelectric layer relative to the thickness of the supporting layer is in a range between 2 and 4. The ratio of the modulus of elasticity of the material forming the supporting layer relative to the modulus of elasticity of the material forming the piezoelectric layer is in a range between 8 and 12.

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Åkersberga, Sweden

Eva Nilsson