Title:
THERMAL-TYPE FLOW METER
Document Type and Number:
WIPO Patent Application WO/2015/182531
Kind Code:
A1
Abstract:
A thermal-type flow meter for representing a flow rate of air by the frequency of a periodic signal, wherein abnormalities in the waveform of an output signal due to frequency variation is prevented while high-frequency noise is suppressed. The thermal-type flow meter pertaining to the present invention is provided with a plurality of switching elements connected in parallel, and varies a delay width between the switching elements in accordance with variation of the frequency of a periodic signal for representing a flow rate.
Inventors:
ANDO RYO (JP)
TERADA DAISUKE (JP)
HOSOKAWA TAKEO (JP)
TERADA DAISUKE (JP)
HOSOKAWA TAKEO (JP)
Application Number:
PCT/JP2015/064844
Publication Date:
December 03, 2015
Filing Date:
May 25, 2015
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01F1/698; H03K17/16; H03K19/0175
Foreign References:
| JP2005311664A | 2005-11-04 | |||
| JP2010010767A | 2010-01-14 | |||
| JPS6435218A | 1989-02-06 | |||
| JP2005333618A | 2005-12-02 | |||
| JPH08228141A | 1996-09-03 | |||
| JP2001285051A | 2001-10-12 | |||
| JPH11239046A | 1999-08-31 |
Other References:
See also references of EP 3150977A4
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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