Title:
THERMAL FLOW RATE METER
Document Type and Number:
WIPO Patent Application WO/2019/198335
Kind Code:
A1
Abstract:
Provided is a thermal flow rate meter that can separately correct different pulsation errors occurring in an upstream-side temperature sensor and a downstream-side temperature sensor. A thermal flow rate meter 1 measures the flow rate of a gas on the basis of the temperature difference between an upstream-side temperature sensor 12 and a downstream-side temperature sensor 13, which are respectively positioned on an upstream side and a downstream side of a heat-producing body 11. The thermal flow rate meter 1 comprises: a detection element 10 that separately outputs an output signal for the upstream-side temperature sensor 12 and an output signal for the downstream-side temperature sensor 13; and a compensation unit 20 that performs response compensation separately for the output signal for the upstream-side temperature sensor 12 and the output signal for the downstream-side temperature sensor 13.
Inventors:
MATSUMOTO MASAHIRO (JP)
NAKANO HIROSHI (JP)
UENODAN AKIRA (JP)
KOTABE AKIRA (JP)
NAKANO HIROSHI (JP)
UENODAN AKIRA (JP)
KOTABE AKIRA (JP)
Application Number:
PCT/JP2019/005499
Publication Date:
October 17, 2019
Filing Date:
February 15, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
G01F1/692; G01F1/696
Foreign References:
| JP2002340645A | 2002-11-27 | |||
| JPH08145754A | 1996-06-07 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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