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US 5,325,724 AGranted
Apparatus for measuring the flowrate of a fluid
OwnerWilfried Kiene, Peter Nisseninventors
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OwnerWilfried Kiene, Peter Nisseninventors
Estimating the term…
A device to measure the flowrate of a fluid containing electrical charges which flows in a pipe section. The device includes at least one electromagnet connected to a current source which generates a magnetic field through the pipe section and at least two electrodes whose central imaginary connecting line passes through the flow stream in the region of the magnetic field to measure the potential resulting from the charge displacements. The circuitry also includes a timing circuit which periodically changes the strength of the excitation current from the current source to the electromagnet and switches a signal shunt which is connected between the electrodes and at least two signal memories. The timing circuit also controls a current sink which is connected in parallel with the electromagnet. The two signal memories, which store signals from the electrodes, are connected to a correction circuit to which the signals stored in the memories are supplied to produce an output signal corresponding to the flowrate of the fluid in the pipe section which is only minimally dependent of the flow profile or the level of the fluid in the pipe section.
Apparatus for measuring the flowrate of a fluid containing electrical charges, said apparatus comprising:
Apparatus for measuring the flowrate of a fluid containing electrical charges, said apparatus comprising:
A device to measure the flowrate of a fluid containing electrical charges which flows in a pipe section in which the device includes at least one electromagnet connected to a current source, which generates a magnetic field through the pipe section and contains at least two electrodes to measure the potential resulting from the charge displacements whose central imaginary connecting line passes through the flow stream in the region of the magnetic field, and contains a timing circuit which periodically changes the strength of the excitation current from the current source to the electromagnet and switches a signal switching element which is connected between the electrodes and at least two signal memories which are connected to a correction circuit, which from the signals stored in the memories produces an output signal corresponding to the flowrate of the fluid in the pipe section which is only minimally dependent on the flow profile or the level of the fluid in the pipe section, wherein a timing circuit controlled current sink is connected in parallel with the electromagnet and a portion of the excitation current passes through the timing circuit controlled current sink when the timing circuit controlled current sink is connected in parallel with the electromagnet.
Dependencies are inferred from the claim text.