Title:
PRESSURE SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/039740
Kind Code:
A1
Abstract:
[Problem] To enhance detection precision even when a pressure wave including transverse wave oscillation is received. [Solution] A pressure sensor 1 is provided with a diaphragm 2, a pressure transmission rod 3 having an element installation part 3b and a pressure transmission part 3a, and a pressure sensing part 5 provided in an installation position of the element installation part 3b. In a position in the axial direction of the pressure transmission rod 3 that differs from the installation position at which the pressure sensing part 5 is installed, the axial direction being the center axis O in the pressure transmission direction, the pressure transmission rod 3 has an asymmetrical rigid part 3d for increasing the resonance frequency of oscillation caused in the pressure transmission rod 3 by a pressure wave transmitted via the diaphragm 2.
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Inventors:
MISAWA TOMONARI (JP)
TERADA DAISUKE (JP)
TERADA DAISUKE (JP)
Application Number:
PCT/JP2019/025599
Publication Date:
February 27, 2020
Filing Date:
June 27, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01L23/18; F02D45/00
Foreign References:
| JPH08136384A | 1996-05-31 |
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (JP)
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