Pressure and force profile sensor and method for detecting press

Details Pressure and force profile sensor and method for detecting press Pressure and force profile sensor and method for detecting press

1998-09-28

2000-04-04

Felber, Joseph L.

Measuring and testing

Dynamometers

Responsive to force

73725, 399 16, 399371, G03G 1500, G01L 102

Patent

active

060447176

ABSTRACT:
A pressure sensor is provided which can detect the presence, absence or magnitude of pressure, as well as a pressure profile. The pressure sensor includes a sensor membrane and a sensor device. The sensor membrane is flexible and may be constructed of a conductive material or may include a flexible film attached to a conductive film. The sensor device includes a sensor strip, a voltage source, and an electrical sensor. The sensor strip includes both a conductive strip and a resistive strip. The conductive strip is arranged parallel to the resistive strip. As pressure is applied to the sensor membrane, the sensor membrane distends or deforms towards the sensor strip. As sufficient pressure is applied, the sensor membrane will make both electrical and mechanical contact with both the conductive strip and the resistive strip at a point along the length of the sensor strip. Since the sensor membrane is conductive, the conductive strip and the resistive strip will be in electrical connection with each other. As the point of application of pressure is varied, the point at which the conductive strip and the resistive strip are connected will vary. As a result, the pressure profile exerted on the sensor membrane may be determined. The pressure sensor may be utilized in a variety of environments to sense a wide variety of pressures including either fluid pressure or physical contact pressure.

REFERENCES:
patent: 4479392 (1984-10-01), Froeb et al.
patent: 5583303 (1996-12-01), Franz
C. F. Malacaria, A Thin, Flexible, Matrix-Based Pressure Sensor, Sensors, pp. 102-104, Sep. 1998.
C. Harverty et al., Enhancing Computer Game Joysticks with Smart Force Transducers, Sensors, pp. 92-95, Sep. 1998.

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