Pressure detection apparatus
US6050146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Jun 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 resi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.