Next Article in Journal
Detecting Unknown Attacks in Wireless Sensor Networks That Contain Mobile Nodes
Previous Article in Journal
Development of a Plastic-Based Microfluidic Immunosensor Chip for Detection of H1N1 Influenza
Article Menu

Export Article

Open AccessArticle
Sensors 2012, 12(8), 10820-10833;

A Linear, Millimetre Displacement-to-Frequency Transducer

Department of Electrical Engineering, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa
P.O. Box 401783, Broadhurst, Gaborone, Botswana
Author to whom correspondence should be addressed.
Received: 1 July 2012 / Revised: 21 July 2012 / Accepted: 26 July 2012 / Published: 6 August 2012
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [867 KB, uploaded 21 June 2014]


The paper presents a novel linear, high-fidelity millimetre displacement-to-frequency transducer, based on the resistive conversion of displacement into a proportional voltage, and then frequency. The derivation of the nonlinearity, fidelity and sensitivity of the transducer is presented. Experimental results confirm that a displacement of 0–100 mm is converted into a frequency range of 0–100 kHz, with a normalised fidelity factor of 99.91%, and a worst-case nonlinearity of less than 0.08%. Tests using laboratory standards show that a displacement of 10 mm is transduced with an accuracy of ±0.6%, and a standard deviation of 530 Hz. Estimates included in the paper show that the transducer could cost less than 1% of existing systems for millimeter displacement measurement. View Full-Text
Keywords: millimetre displacement; displacement-to-frequency; high-fidelity millimetre displacement; displacement-to-frequency; high-fidelity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Agee, J.T.; Petto, F.K. A Linear, Millimetre Displacement-to-Frequency Transducer. Sensors 2012, 12, 10820-10833.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top