Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1988-09-28
1989-10-03
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
250577, 250341, 36457108, 73293, 141 95, G01F 2500
Patent
active
048708542
ABSTRACT:
A method of calibrating and adjusting an apparatus for determining the fill level of a selected specific fiber material in a filling chute of a fiber storing device. The apparatus includes an optical device situated above an expected maximum fill level in the filling chute and having a light emitter arranged to direct a light beam from above onto an upper face of the fiber material and a light detector arranged to receive a light beam reflected from the upper face, a microcomputer, including a microprocessor, operatively connected to the apparatus for receiving detector signals from the apparatus. The calibrating method comprises the steps of providing two vertically spaced fixed markings on a side wall of the filling chute; charging the filling chute with a fiber material of a specific type; generating detector signals when the level of the fiber material in the filling chute reaches the lower and the upper marking, respectively, whereby the generated detector signals represent two known height levels of the fiber material of specific type; and storing the generated detector signals in the microcomputer, whereby calibration of the apparatus for the fiber material of the specific fiber type is obtained.
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"Cyrogenic Level Measuring System With Thermal Stabilization of the Transducer Mounting" Measurement Techniques vol. 25, No. 1, Jan. 1982, pp. 59-61; A. L. Seifer et al.
Noland Tom
Trutzschler GmbH & Co. KG
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