Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1991-12-16
1994-05-17
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01F 2500
Patent
active
053117620
ABSTRACT:
A method and apparatus for calibrating a flow sensor composed of two heat sensors each having an electrical impedance parameter which varies as a defined function of the temperature of the heat sensor and disposed in thermal communication with a fluid such that the relation between heat flow to or from one sensor and heat flow to or from the other sensor varies with the rate of fluid flow, a source supplying electric power at a selected level to the heat sensors, and an output device connected to produce an output signal representative of that heat flow relation, calibration being performed by: establishing a known flow rate for the fluid; electrically connecting one of the heat sensors to a circuit element which alters the magnitude of current flowing through the one heat sensor; and determining, in a first determining step, output signal value while the one heat sensor is electrically connected to the circuit element.
REFERENCES:
patent: 2389615 (1945-11-01), Eder
patent: 3938384 (1976-02-01), Blair
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4320650 (1980-03-01), Kita
patent: 4418568 (1983-12-01), Surman
patent: 4487063 (1984-12-01), Hopper
patent: 4524616 (1985-06-01), Drexel et al.
patent: 5076099 (1991-12-01), Hisanaga et al.
patent: 5150611 (1992-01-01), Kleinhans
"Two Point Calibration of the Lineariser for a Lot-Wire Anemometer", J. Phys. E: Sci. Instrum., vol. 13, No. 12, pp. 1278-1279; Dec. 1980; F. Sakao.
DXL USA
Noland Tom
LandOfFree
Flow sensor calibration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flow sensor calibration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow sensor calibration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-869283