Sensor arrangement
First Claim
1. A system for detecting at least one physical characteristic of an elastic structure subjected to a force under a motion, said structure being provided with at least one sensor comprising a first and a second electrodes and a piezoelectric material, which upon deformation generates a charge displacement in the material giving rise to a voltage between said first and second electrodes being directly proportional to the force causing the deformation, said voltage being convertible to a signal representing said characteristic, and said system comprising at least one detector comprising a receiver for receiving said signal representing said characteristic, wherein said sensor further comprises a first sensor conductor being connected to said first electrode and a second sensor conductor being connected to said second electrode, said first and said second sensor conductors being arranged as antennas, and wherein said detector comprises a receiver antenna arranged adjacent to said elastic structure for capacitively sensing said voltage between said first and said second sensor conductors, thereby enabling determination of said characteristic.
1 Assignment
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Accused Products
Abstract
The present invention relates to a system for detecting characteristics of an elastic structure (13, 22, 23, 32, 33, 93, 1202, 1302, 1402), said structure being provided with at least one sensor (111, 112, 14, 211, 212, 311, 312, 911, 1211, 1311, 1411) and said system comprising at least one detector (16, 416, 516, 916, 1316, 1416). The sensor comprises a deformable member, which upon deformation generates a signal convertible to a signal representing said characteristic, said sensor further comprises a passive transmitter and said detector a receiver for receiving said signal representing said characteristic.
54 Citations
49 Claims
- 1. A system for detecting at least one physical characteristic of an elastic structure subjected to a force under a motion, said structure being provided with at least one sensor comprising a first and a second electrodes and a piezoelectric material, which upon deformation generates a charge displacement in the material giving rise to a voltage between said first and second electrodes being directly proportional to the force causing the deformation, said voltage being convertible to a signal representing said characteristic, and said system comprising at least one detector comprising a receiver for receiving said signal representing said characteristic, wherein said sensor further comprises a first sensor conductor being connected to said first electrode and a second sensor conductor being connected to said second electrode, said first and said second sensor conductors being arranged as antennas, and wherein said detector comprises a receiver antenna arranged adjacent to said elastic structure for capacitively sensing said voltage between said first and said second sensor conductors, thereby enabling determination of said characteristic.
- 45. A sensor arrangement for incorporation into an elastic structure and for providing at least one physical characteristic of said structure when subjected to a force under a motion, said sensor comprising a first and a second electrodes and a piezoelectric material, which upon deformation generates a charge displacement in the material giving rise to a voltage between said first and second electrodes being directly proportional to the force causing the deformation, said voltage being convertible to a signal representing said characteristic, wherein said sensor further comprises a first sensor conductor being connected to said first electrode and a second sensor conductor being connected to said second electrode, said first and second sensor conductors being arranged as antennas in such a way that capacitive sensing of said voltage between said first and said second sensor conductors is enabled when said sensor is incorporated in the elastic structure.
Specification