Title:
DETECTING DEVICE AND DETECTING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/154627
Kind Code:
A1
Abstract:
A pressure detecting device which detects the combustion pressure in an internal-combustion engine includes: a piezoelectric element 10 which outputs a charge signal corresponding to the pressure in a combustion chamber; and a mounting board 210 on which are mounted an integrating circuit 212 which integrates the charge signal output by the piezoelectric element 10, and amplification circuit 213 which amplifies a voltage signal obtained by integration. On the mounting board 210 are provided a power receiving terminal 211a which receives a power supply voltage from a control device, an output terminal 211b which outputs an output signal to the control device after amplification, and a grounding terminal 211c for making the ground of the control device and the mounting board 210 common. Furthermore, in the mounting board 210, the grounding terminal 211c, and grounding terminals of the integrating circuit 212 and the amplification circuit 213 are connected by way of grounding ferrite beads 216.
Inventors:
KANAMORI YUTA (JP)
AIBA TETSUYA (JP)
YOMOYAMA MASANORI (JP)
SUE SATOSHI (JP)
AIBA TETSUYA (JP)
YOMOYAMA MASANORI (JP)
SUE SATOSHI (JP)
Application Number:
PCT/JP2017/007316
Publication Date:
September 14, 2017
Filing Date:
February 27, 2017
Export Citation:
Assignee:
CITIZEN FINEDEVICE CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
International Classes:
G01L9/00; G01D3/028; G01D21/00; G01L23/10; G01L23/22; G12B17/02
Foreign References:
| JP2866054B2 | 1999-03-08 |
Other References:
See also references of EP 3428598A4
Attorney, Agent or Firm:
FURUBE, Jiro et al. (JP)
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