Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements

This paper reports on a force plate (FP) using mechanical springs and noncontact distance sensors. The ground reaction force (GRF) is one of the factors for clarify biomechanics, and FPs are widely used to measure it. The sensor elements of conventional FPs are mainly strain gauges. Thus, the mechan...

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Autores principales:	Yuta Kawasaki, Ami Ogawa, Hidetoshi Takahashi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ground reaction force force plate noncontact distance sensor Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/a36abd7cb99a44be910a927f2d6231a2
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spelling	oai:doaj.org-article:a36abd7cb99a44be910a927f2d6231a22021-11-11T19:06:58ZForce Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements10.3390/s212170921424-8220https://doaj.org/article/a36abd7cb99a44be910a927f2d6231a22021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7092https://doaj.org/toc/1424-8220This paper reports on a force plate (FP) using mechanical springs and noncontact distance sensors. The ground reaction force (GRF) is one of the factors for clarify biomechanics, and FPs are widely used to measure it. The sensor elements of conventional FPs are mainly strain gauges. Thus, the mechanical properties of FP depend on the sensor element performance. If the FP performance must change, we must redesign the FP, including changing the sensor elements. Here, we proposed an FP that uses a measuring principle based on simple springs and noncontact sensors. The shape and performance of the proposed FP are expected to change easily. As a prototype device, we designed and fabricated an FP installed with 12 springs and four sensors for human walking. A planar coil and magnet were used as the sensor elements, and the sensor output was proportional to the vertical and horizontal displacements. The FP resonance frequency was 123 Hz, which was larger than the required specification. The calibration experiments showed that vertical and horizontal forces and moments could be measured independently. The FP’s resolutions were 1.9 N and 1.4 N in the anterior–posterior and vertical directions, respectively. Furthermore, the fabricated FP measured GRF similarly to the commercial FP when a human walked on the plate. These results suggest that the proposed method will be helpful for FPs with custom-made requirements.Yuta KawasakiAmi OgawaHidetoshi TakahashiMDPI AGarticleground reaction forceforce platenoncontact distance sensorChemical technologyTP1-1185ENSensors, Vol 21, Iss 7092, p 7092 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ground reaction force force plate noncontact distance sensor Chemical technology TP1-1185
spellingShingle	ground reaction force force plate noncontact distance sensor Chemical technology TP1-1185 Yuta Kawasaki Ami Ogawa Hidetoshi Takahashi Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
description	This paper reports on a force plate (FP) using mechanical springs and noncontact distance sensors. The ground reaction force (GRF) is one of the factors for clarify biomechanics, and FPs are widely used to measure it. The sensor elements of conventional FPs are mainly strain gauges. Thus, the mechanical properties of FP depend on the sensor element performance. If the FP performance must change, we must redesign the FP, including changing the sensor elements. Here, we proposed an FP that uses a measuring principle based on simple springs and noncontact sensors. The shape and performance of the proposed FP are expected to change easily. As a prototype device, we designed and fabricated an FP installed with 12 springs and four sensors for human walking. A planar coil and magnet were used as the sensor elements, and the sensor output was proportional to the vertical and horizontal displacements. The FP resonance frequency was 123 Hz, which was larger than the required specification. The calibration experiments showed that vertical and horizontal forces and moments could be measured independently. The FP’s resolutions were 1.9 N and 1.4 N in the anterior–posterior and vertical directions, respectively. Furthermore, the fabricated FP measured GRF similarly to the commercial FP when a human walked on the plate. These results suggest that the proposed method will be helpful for FPs with custom-made requirements.
format	article
author	Yuta Kawasaki Ami Ogawa Hidetoshi Takahashi
author_facet	Yuta Kawasaki Ami Ogawa Hidetoshi Takahashi
author_sort	Yuta Kawasaki
title	Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
title_short	Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
title_full	Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
title_fullStr	Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
title_full_unstemmed	Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements
title_sort	force plate with simple mechanical springs and separated noncontact sensor elements
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a36abd7cb99a44be910a927f2d6231a2
work_keys_str_mv	AT yutakawasaki forceplatewithsimplemechanicalspringsandseparatednoncontactsensorelements AT amiogawa forceplatewithsimplemechanicalspringsandseparatednoncontactsensorelements AT hidetoshitakahashi forceplatewithsimplemechanicalspringsandseparatednoncontactsensorelements
_version_	1718431601827774464

Force Plate with Simple Mechanical Springs and Separated Noncontact Sensor Elements

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