Title:
PRESSURE DETECTION SIGNAL PROCESSING DEVICE, ENGINE CONTROL SYSTEM, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/105074
Kind Code:
A1
Abstract:
The objective of this invention is to remove piezoelectric element drift and thereby obtain a highly accurate pressure detection signal, by means of a simple configuration. A pressure detection signal processing device 200 comprises: a charge amplifier 210 that accumulates charge produced by a piezoelectric element 35 in response to received pressure and outputs a corresponding voltage signal; drift component extraction units 230, 240 that extract a piezoelectric element 35 drift component by subjecting the voltage signal to differentiation processing; and a drift correction unit 250 that uses the extracted drift component to generate a correction signal for removing the drift component and feeds the correction signal back to the input side of the charge amplifier.
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Inventors:
FUJISAKI SATORU (JP)
FUKUI KATSUHIKO (JP)
FUKUI KATSUHIKO (JP)
Application Number:
PCT/JP2018/042614
Publication Date:
May 28, 2020
Filing Date:
November 19, 2018
Export Citation:
Assignee:
MIKUNI KOGYO KK (JP)
International Classes:
G01L23/10; F02D45/00; G01L23/22
Foreign References:
| JP4407044B2 | 2010-02-03 |
Attorney, Agent or Firm:
OKUYAMA Yuki et al. (JP)
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