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Patent Searching and Data


Title:
Thermal type flowmeter
Document Type and Number:
Japanese Patent JP6185168
Kind Code:
B2
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:
安藤 亮
寺田 大介
細川 丈夫
Application Number:
JP2016523478A
Publication Date:
August 23, 2017
Filing Date:
May 25, 2015
Export Citation:
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Assignee:
日立オートモティブシステムズ株式会社
International Classes:
G01F1/696; H03K4/02; H03K17/16; H03K19/0175
Domestic Patent References:
JP2005311664A
JP2010010767A
JP64035218A
JP2005333618A
JP8228141A
JP2001285051A
JP11239046A
JP1228214A
JP2004219219A
JP8097701A
Foreign References:
US4043196
US20130211767
Attorney, Agent or Firm:
平木 祐輔
藤田 節
渡辺 敏章