Capacitive tactile sensor
First Claim
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1. A sensor for determining pressures of contact between the surface of said sensor and the surface of an object to be acted on, or from which action is to be received;
- wherein said sensor is comprised of regions of capacitance, whose capacitance varies according to force applied to the contact surface of said region;
where capacitance of said region is estabilished, at least in part, by the separation of conducting surfaces;
wherein said seperation is maintained by compression cells, and wherein said compression cells contain only gas and provide means wherein capacitance of said regions varies linearly with external force applied to said region within the mechanical limits of said cell, and wherein said capacitance is measured by external means.
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Abstract
Contact pressure between the surface of the sensor and the surface of a second object can be measured by a change in capacitance across compressible cells, which comprise the active elements of the sensor. The design allows for the accurate measurement of different pressures at different locations in the area of contact (spatial discrimination), and can be used over a wide range of pressure. As a passive device, it requires external modulation and detection.
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Citations
8 Claims
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1. A sensor for determining pressures of contact between the surface of said sensor and the surface of an object to be acted on, or from which action is to be received;
- wherein said sensor is comprised of regions of capacitance, whose capacitance varies according to force applied to the contact surface of said region;
where capacitance of said region is estabilished, at least in part, by the separation of conducting surfaces;
wherein said seperation is maintained by compression cells, and wherein said compression cells contain only gas and provide means wherein capacitance of said regions varies linearly with external force applied to said region within the mechanical limits of said cell, and wherein said capacitance is measured by external means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- wherein said sensor is comprised of regions of capacitance, whose capacitance varies according to force applied to the contact surface of said region;
Specification