NDLI: Non-invasive capacitive sensor for the determination of revolution speed and fill level in screw conveyors

Content Provider	IEEE Xplore Digital Library
Author	Moser, M.J. Fuchs, A. Zangl, H.
Copyright Year	2008
Description	Author affiliation: Inst. of Electr. Meas. & Meas. Signal Process., Graz Univ. of Technol., Graz (Moser, M.J.; Fuchs, A.; Zangl, H.)
Abstract	This paper presents a capacitive measurement principle for the determination of the mass and volume flow rate and the revolution speed of screw conveyors. The measurement is realized using a set of transmitter electrodes and a single receiver ring electrode on the outer pipe surface. Sequential measurement of the inter-electrode capacitances between active transmitter and receiver is performed by means of a versatile hardware platform. A laboratory setup was designed and built. Sets of sensor data were acquired for different cereals. It is shown that the fill level influences the measured capacitances due to the permittivity of the bulk solids. Furthermore, the revolution speed and its variation over time can be directly deduced from the sensor signals. The good signal to noise ratio allows for a reliable measurement of the mass and volume flow rate.
Starting Page	49
Ending Page	52
File Size	1014121
Page Count	4
File Format	PDF
ISBN	9781424425808
ISSN	19300395
DOI	10.1109/ICSENS.2008.4716380
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitive sensors Fasteners Permittivity measurement Fluid flow measurement Volume measurement Transmitters Electrodes Capacitance measurement Velocity measurement Performance evaluation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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