Resistive strain gauge pressure sensor with increased sensitivit

Details Resistive strain gauge pressure sensor with increased sensitivit Resistive strain gauge pressure sensor with increased sensitivit

1992-12-11

1994-06-07

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73721, 73726, 73727, 338 4, G01L 708, G01L 906, G01L 1302

Patent

active

053179200

ABSTRACT:
A resistive strain gauge pressure sensor including upper and lower housings coacting to define a pressure chamber within the housing. A board member is clamped between the housings and defines a diaphragm portion which extends across the pressure chamber to divide the pressure chamber into upper and lower chamber portions. All of the circuitry of the sensor is screen printed onto the lower planar face of the board member including the various resistor elements of the strain gauge assembly, the various elements of the conditioning circuit receiving the output of the strain gauge assembly, and the various further leads required to connect the circuitry elements to the terminals of the sensor. The sensor terminals are provided by a plurality of connector pins extending downwardly through the board member for connection at their respective lower ends to the circuitry provided on the lower face of the board member. Each resistor element of the strain gauge assembly is screen printed onto a pad which is screen printed onto the diaphragm portion. The pads increase the strain experience by the resistors in response to a given deflection of the diaphragm and thereby increase the sensitivity of the sensor to a given pressure differential applied across the diaphragm.

REFERENCES:
patent: 2438205 (1948-03-01), Coates
patent: 3184962 (1965-05-01), Gay
patent: 3278882 (1966-10-01), Love
patent: 3505634 (1970-04-01), Von Vick
patent: 3993939 (1976-11-01), Slavin et al.
patent: 4586018 (1986-04-01), Bettman et al.
patent: 4600912 (1986-07-01), Marks et al.
patent: 4672354 (1987-06-01), Kurtz et al.
patent: 4711130 (1987-12-01), Glas et al.
patent: 5028394 (1991-07-01), Lowell, Jr. et al.
patent: 5174158 (1992-12-01), Kremidas

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