Measuring and testing – Volume or rate of flow – Thermal type
Patent
1978-04-24
1979-01-23
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
G01F 168
Patent
active
041353960
ABSTRACT:
Apparatus are disclosed for sensing the velocity of a fluid stream, as may be flowing in a duct, pipe, or the like, which fluid stream exhibits variations in its temperature under different operating conditions. The apparatus includes a first probe which is exposed to the fluid stream and includes first temperature sensing means for sensing the temperature of the fluid stream. A second probe is provided which is disposed within the fluid stream and includes at least a portion constructed of a thermally conductive material. Heater means are disposed in thermally conductive relationship with said thermally conductive portion, and second temperature indicative of the temperature of said heater means. Third temperature sensing means are provided for sensing the temperature of the thermally conductive portion of the second probe at a point removed from the heater means, which temperature is a function of the heater means temperature, the fluid temperature, and the velocity of the fluid flowing thereover. In order to compensate for variations in the fluid temperature, heater control circuit means are provided for receiving temperature signals from the first and second temperature sensing means and for controlling the heat output of the heater means so as to maintain substantially constant the temperature difference between the fluid and heater means. Velocity output circuit means are provided for receiving the fluid temperature signal from the first temperature sensing means and the second probe temperature signal from the third temperature sensing means and for producing a signal related to the differences between said temperatures, which signal is related to the velocity of the fluid stream.
REFERENCES:
patent: 3335606 (1967-08-01), Scarpa
patent: 3623364 (1971-11-01), Withrow
patent: 3800592 (1974-04-01), Jones
Rentmeester Paul C.
Stanke Dennis A.
Ulland Paul D.
Ferguson Peter D.
Goldstein Herbert
Lewis Carl M.
The Trane Company
LandOfFree
Temperature compensating fluid velocity sensing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature compensating fluid velocity sensing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensating fluid velocity sensing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2267552