Automatic calibration check arrangement in a measuring device

Details Automatic calibration check arrangement in a measuring device Automatic calibration check arrangement in a measuring device

1998-03-20

2000-01-11

Raevis, Robert

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01F 100

Patent

active

060123230

ABSTRACT:
A method for providing an automatic calibration check of a measuring device in which particles to be measured are subjected to tangential acceleration in a whirling impeller, and torque exerted on the vanes of the impeller in reaction to the Coriolis force of accelerated particles is measured as an indication of a mass flow rate, and wherein the flow of material is fed to the central part of the impeller and thereafter is by centrifugal force thrown towards the circumference of the impeller. Flow is measured by an electronic device which includes a microcomputer. When the flow is absent or constant the rotational speed of the impeller is varied, the moment change thereof is measured and an integrated value of the kinetic energy is used to verify the operation of the instrument.

REFERENCES:
Medical and Biological Engineering And Computing, vol. 33, No.6, Nov. 1, 1995,pp. 835-837, Kranse et al "Linearisation of a Urinary Flow Transducer".
Patent Abstracts of Japan, vol. 096, No. 004, Apr. 30, 1996, JP 07-333017.

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