Title:
LOAD DETECTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/074222
Kind Code:
A1
Abstract:
A load detecting device (4) comprises: a load sensor (1) provided with an element part, the capacitance of which changes in accordance with a load; a first detection circuit (20) for charging one electrode of the element part with a prescribed voltage and discharging the charging voltage, and outputting the voltage of the element part in a charging period; a second detection circuit (30) for discharging from the prescribed voltage and charging the prescribed voltage with respect to the other electrode of the element part in parallel with charging and discharging in the first detection circuit (20), and outputting the voltage of the element part in a discharging period; and a control circuit (3) for detecting the capacitance of the element part on the basis of a differential voltage obtained by adding the voltage obtained by inverting a second detection voltage outputted from the second detection circuit (30) between the prescribed voltage and ground to a first detection voltage outputted from the first detection circuit (20).
Inventors:
YAMAMOTO YUTA
UKITSU HIRONOBU
MORIURA YUTA
YAMAGUCHI MITSUTAKA
UKITSU HIRONOBU
MORIURA YUTA
YAMAGUCHI MITSUTAKA
Application Number:
PCT/JP2022/035777
Publication Date:
May 04, 2023
Filing Date:
September 26, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01L1/14; G01L5/00
Foreign References:
| JPH05215625A | 1993-08-24 | |||
| JP2008542760A | 2008-11-27 | |||
| US20120146726A1 | 2012-06-14 | |||
| CN109520403A | 2019-03-26 |
Attorney, Agent or Firm:
SHIBANO, Masanori et al. (JP)
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