Measuring and testing – Volume or rate of flow – Thermal type
Patent
1982-12-14
1985-02-05
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
G01F 132
Patent
active
044972032
ABSTRACT:
An apparatus for measuring the flow velocity by detecting the number of Von Karman's vortex streets or Strouhl vortexes by utilizing heating wires, said apparatus comprising a vortex generator disposed in a fluid to be measured, at least one heat-sensitive element which detects the flow velocity or flow rate of the fluid in the form of change of temperature caused by said vortex generator, and which produces detection signals that represent change in frequency of the electric signals, an operational amplifier for amplifying the detection signals, and a feedback circuit which feeds the output of said operational amplifier back to said heat-sensitive element such that its temperature is maintained substantially constant, and such that the preset temperature of said heat-sensitive element changes in response to the output of said operational amplifier, whereby the frequency characteristics thereof are improved and the apparatus can be stably started under any conditions.
REFERENCES:
patent: 3564915 (1971-02-01), Tomota et al.
patent: 3587312 (1971-06-01), McMurtrie
patent: 4320650 (1982-03-01), Kita
patent: 4386520 (1982-06-01), Nagaishi
Goldstein Herbert
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Apparatus for measuring flow velocity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for measuring flow velocity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring flow velocity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2078107