Measuring and testing – Volume or rate of flow – System
Patent
1976-11-18
1977-11-22
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
System
G01F 160
Patent
active
040590143
ABSTRACT:
An electromagnetic flowmeter in which the fluid to be metered is conducted through a flow tube where it intersects a magnetic field established by an electromagnet. A pair of electrodes each having a relatively large surface area are mounted at diametrically-opposed positions in the flow tube whereby the electromotive force induced in the fluid and detected by the electrodes when the fluid velocity profile is non-uniform, is averaged and an electromotive force proportional to average flow velocity is obtained. The electromagnet is energized by a low-frequency wave produced by applying the output of a full-wave rectifier coupled to a commercial power line to the excitation coils of the electromagnet through an electronic switching element that acts to periodically chop the full-wave rectified voltage in accordance with high-frequency pulses whose frequency is higher than the power line frequency, the duty cycle thereof being gradually modulated by a low-frequency wave whose frequency is less than the power line frequency.
REFERENCES:
patent: 3783687 (1974-01-01), Mannherz et al.
patent: 3991612 (1976-11-01), Mannherz et al.
patent: 3996797 (1976-12-01), Torimaru et al.
Hokushin Electric Works, Ltd.
Ruehl Charles A.
LandOfFree
Electromagnetic flowmeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic flowmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic flowmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2253888