Journal ArticleDOI
A surface profile reconstruction method based on multisensor capacitive transducers
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TLDR
In this paper, a reconstruction system based on a three-sensor transducer and AC transformer bridges is proposed, and the system performance is evaluated by computer simulations taking into account noise and deviations from ideal operating conditions.About:
This article is published in Measurement.The article was published on 1994-03-01. It has received 7 citations till now. The article focuses on the topics: Capacitive sensing & Surface reconstruction.read more
Citations
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Journal ArticleDOI
Analysis of linearity errors of inverse capacitance position sensors
TL;DR: The finite element method has been used for modelling the electrostatic field and for calculation of the capacitance and deviations from ideal behaviour of displacement sensors on the basis of the potential linearity of the versus distance dependence as mentioned in this paper.
Journal ArticleDOI
Automatic compensation technique for alternating current metrology based on synchronous filtering
Luca Callegaro,Vincenzo D'Elia +1 more
TL;DR: In this article, an automatic compensation technique is described, where the terminal-pair voltage is continuously sensed, by means of vector synchronous detection, and the injected voltage is directly synthesized from the main circuit source.
Journal ArticleDOI
Error analysis of a new cylindrical capacitive sensor (CCS) for measuring five-dimensional motions of a rotor
Hyeong-Joon Ahn,Soo Jeon +1 more
TL;DR: In this paper, the authors proposed a new smart sensor system that can measure the complete five-dimensional motions of a rotating shaft by combining two radial CCSs and a specially designed target rotor.
Patent
Method and device for acquiring a geometric form
TL;DR: In this article, a method and device for acquiring a geometric form is described, which comprises the following steps consisting in: placing a set of sensors (4a) on the geometric form, each sensor providing signals that are representative of the orientation of the curve or surface at the location of said sensor; selecting a model of the shape or surface; determining the parameters of the model from the signals; and determining the spatial distribution of the points of the form from said parameters.
Journal ArticleDOI
Quadrature phase shifter for audio frequency sinewaves
Luca Callegaro,Vincenzo D'Elia +1 more
TL;DR: In this paper, a quadrature phase shifter for sinusoidal signals is presented, which provides phase delay (within ) and unity gain (within 6%) in the frequency range 100 Hz to 10 kHz.
References
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Journal ArticleDOI
Application of capacitance techniques in sensor design
TL;DR: In this paper, the basic principles of capacitance, and also clarifying some of the misconceptions about the principles of guarding, which were correctly described by Kelvin more than a century ago, are discussed and the possibilities for combining bridge circuits with simultaneous and sequential measurements of complex sensors are described.
Journal ArticleDOI
Electronic transducers for industrial measurement of low value capacitances
TL;DR: In this article, the effects of stray capacitances on the measurement system must be minimized, in order to achieve high measurement sensitivity and good signal-to-noise ratio.
Journal ArticleDOI
The design and some applications of sensitive capacitance micrometers
R V Jones,J C S Richards +1 more
TL;DR: In this paper, a general account of both the electrical and the mechanical aspects of the design of capacitative transducers and their associated electronic circuitry suitable for observing displacements of the order 10-2 to 10-11 mm.
Journal ArticleDOI
Precise Measurement of Planeness
G Schulz,J Schwider +1 more
TL;DR: A relative method, where, with the aid of fringes of superposition, the fringe separation is subdivided equidistantly thus achieving an increase of measuring precision, and an absolute method which determines the deviations of a surface from ideal planeness along arbitrary central sections, without a liquid surface.
Journal ArticleDOI
The application of capacitance micrometry to the control of Fabry-Perot etalons
TL;DR: In this paper, the capacitance micrometer was used to measure very small displacements in piezo-scanned Fabry-Perot etalons using a closed-loop feedback system, which removed the nonlinear response and hysteresis associated with piezoelectric transducers and allowed precise control of both etalon gap and parallelism.