Device for measuring the flow of fluid through a measuring pipe

Details Device for measuring the flow of fluid through a measuring pipe Device for measuring the flow of fluid through a measuring pipe

1994-08-29

1996-03-19

Chilcot, Richard

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

7386117, G01F 158

Patent

active

054995434

ABSTRACT:
A device for measuring the flow of a fluid through a measuring pipe, includes a first coil arranged above the measuring pipe, a second coil arranged below the measuring pipe, and a pair of electrodes facing one another, on the sides of said measuring pipe. The coils are excitable and produce both aiding and opposing magnetic fields. A correction circuit corrects the voltage (U.sub.r) between the electrodes. The corrected voltage is approximately proportional to the fluid flow in the presence of aiding magnetic fields when the measuring pipe is partially filled. The correction circuit provides correction to an output signal (S) corresponding to the flow of the fluid when the measuring pipe is partially filled by means of a correction function to a corrected voltage (U.sub.t) which depends on the voltages (U.sub.r, U.sub.g) between the electrodes in the presence of aiding and opposing magnetic fields. The correction function is accomplished by employing a detecting electrode which is arranged at the top of the measuring pipe for detecting complete filling of the measuring pipe. The potential generated by the detecting electrode controls a circuit such that when the measuring pipe is completely filled, the circuit generates voltage (U.sub.r) corresponding to the aiding magnetic fields as an output signal (S), and when the measuring pipe is partly filled, the circuit generate the corrected voltage (U.sub.t) as an output signal (S).

REFERENCES:
patent: 3981190 (1976-09-01), Vidmantas
patent: 4470309 (1984-09-01), Wada
patent: 4658653 (1987-04-01), Tomita
patent: 5018391 (1991-05-01), Doll
patent: 5301556 (1994-04-01), Nissen et al.
patent: 5375475 (1994-12-01), Kiene et al.
Noriichi et al; "Electromagnetic Flow Meter"; Patent Abstracts of Japan, vol. 9, No. 170, p. 373, Jul. 16, 1985.
Translation of .sctn. "Technische Stromungslehre" 4.4.3 of by Willi Bohl, 9th edition, 1991; published Dec. 16, 1985.

Affiliated with

Also associated with

Rating

Device for measuring the flow of fluid through a measuring pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for measuring the flow of fluid through a measuring pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for measuring the flow of fluid through a measuring pipe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1953323