Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1997-06-16
2000-04-18
Oen, William
Measuring and testing
Fluid pressure gauge
Diaphragm
G01L 902
Patent
active
060501464
ABSTRACT:
To obtain a pressure detection apparatus capable of changing output characteristics in a large area and changing a received pressure range without largely changing the apparatus in design. The apparatus comprises a pressure sensor including a pressure detection element having a bridge circuit to which a gauge resistor formed around a diaphragm portion formed by decreasing a part of the element in thickness is connected and an amplification circuit body serving as an amplification circuit except for an adjustment resistor, the pressure sensor being airtightly accommodated in a package having a pressure supply portion for supplying a pressure to be measured to the diaphragm portion, and a lead portion being disposed in the pressure sensor; an adjustment resistor part constituting the amplification circuit of the bridge circuit together with the amplification circuit body; a circuit substrate which is mounted by soldering to expose the pressure sensor and the adjustment resistor part and has a terminal portion for leading out an output from the amplification circuit; and a sensor accommodation vessel for accommodating an assembly constituted by the pressure sensor, the adjustment resistor part, and the circuit substrate therein.
Araki Toru
Kodama Seiki
Nagano Susumu
Nakamura Hiroshi
Mitsubishi Denki & Kabushiki Kaisha
Oen William
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