Next Article in Journal
Olfaction, Vision, and Semantics for Mobile Robots. Results of the IRO Project
Previous Article in Journal
Evaluation of Molecularly Imprinted Polymers for Point-of-Care Testing for Cardiovascular Disease
Previous Article in Special Issue
Capture Point-Based Controller Using Real-Time Zero Moment Point Manipulation for Stable Bipedal Walking in Human Environment
Article Menu

Export Article

Open AccessCommunication

Logarithmic Strain Model for Nonlinear Load Cell

Department of Electrical and Computer Engineering, Ajou University, Suwon 16499, Korea
Department of Electrical Engineering, Myongji University, Yongin 17058, Korea
Author to whom correspondence should be addressed.
Sensors 2019, 19(16), 3486;
Received: 10 June 2019 / Revised: 6 August 2019 / Accepted: 7 August 2019 / Published: 9 August 2019
PDF [1573 KB, uploaded 9 August 2019]


General load cells have typically constant sensitivity throughout the measurement range, which is acceptable for common force measurement systems. However, it is not adequate for high-performance control and high-stroke applications such as robotic systems. It is required to have a higher sensitivity in a small force range than that in a large force range. In contrast, for large loading force, it is more important to increase the measurement range than the sensitivity. To cope with these characteristics, the strain curve versus the force measurement should be derived as a logarithmic graph. To implement this nonlinear nature, the proposed load cell is composed of two mechanical components: an activator, which has a curved surface profile to translocate the contact point, and a linear torque measurement unit with a moment lever to measure the loading force. To approximate the logarithmic deformation, the curvature of the activator was designed by an exponential function. Subsequent design parameters were optimized by an evolutionary computation. View Full-Text
Keywords: nonlinear load cell; logarithmic strain model; force measurement nonlinear load cell; logarithmic strain model; force measurement

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Hong, Y.-D.; Lee, B. Logarithmic Strain Model for Nonlinear Load Cell. Sensors 2019, 19, 3486.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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