Pressure sensor and method for detecting pressure

Details Pressure sensor and method for detecting pressure Pressure sensor and method for detecting pressure

1998-09-28

2000-03-07

Felber, Joseph L.

Measuring and testing

Fluid pressure gauge

Diaphragm

399371, 399 16, G01L 902

Patent

active

060325364

ABSTRACT:
A pressure sensor is provided which can detect the presence, absence or magnitude of pressure. 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 an electrode substrate having an electrode surface and a set of electrodes disposed on the electrode surface. As pressure is applied to the sensor membrane, the sensor membrane distends or deforms towards the electrode set positioned on the electrode surface. As sufficient pressure is applied, the sensor membrane will make both electrical and mechanical contact with at least two of the electrodes. Since the sensor membrane is conductive, the contacted electrodes will be in electrical connection with each other. As pressure is increased, additional electrodes will be contacted and placed in electrical contact with each other. As a result, the presence, absence or magnitude of pressure exerted on the sensor membrane may be determined. The pressure sensor may be utilized in a variety of environments to sense either fluid pressure or physical contact pressure.

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

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