Title:
WIND SPEED MEASUREMENT DEVICE AND AIR FLOW MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/031329
Kind Code:
A1
Abstract:
Provided is a wind speed measurement device that has a simple configuration, can be produced inexpensively, and has high measurement precision. The present invention has a fixed-temperature heat generation device 10 comprising a power source Vcc, a positive-characteristic thermistor element 22, a switching element Q1, a comparator element Cmp1, a first negative-characteristic thermistor element 21, a second negative-characteristic thermistor element 32, and a plurality of resistor elements R1-R5. The switching element Q1 repeatedly switches between on and off so as to cause the positive-characteristic thermistor element 22, which is disposed at a wind speed measurement site, to generate heat at a set temperature, and applies a pulse voltage from the power source Vcc to the positive-characteristic thermistor element 22. The wind speed at the wind speed measurement site is calculated on the basis of the waveform of the pulse voltage. A second switch SW2 is added, whereby measurement errors arising due to increases and decreases in the temperature of the wind to be measured are corrected.
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Inventors:
KITAMURA AKIHIRO (JP)
Application Number:
PCT/JP2018/028802
Publication Date:
February 14, 2019
Filing Date:
August 01, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01P5/12
Foreign References:
| US20130125643A1 | 2013-05-23 | |||
| JP2012052808A | 2012-03-15 | |||
| JP2008014729A | 2008-01-24 | |||
| US20060100795A1 | 2006-05-11 | |||
| JP2003240620A | 2003-08-27 | |||
| US6035726A | 2000-03-14 | |||
| JPH0682286A | 1994-03-22 |
Attorney, Agent or Firm:
KAWAMOTO, Takashi (JP)
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