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System and method for three dimensional calibration of force plates

A force plate and algorithm technology, applied in the field of three-dimensional calibration, can solve problems such as inaccurate measurement and achieve the effect of improving accuracy

Active Publication Date: 2015-07-29
ADVANCED MECHANICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This off-axis sensitivity causes false signals to be sensed and transmitted, often referred to as crosstalk errors
Crosstalk errors often lead to inaccurate measurements

Method used

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  • System and method for three dimensional calibration of force plates
  • System and method for three dimensional calibration of force plates
  • System and method for three dimensional calibration of force plates

Examples

Experimental program
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Embodiment Construction

[0036] figure 1 is a force plate system 100 according to one embodiment of the present invention. System 100 is used to measure ground reaction forces and includes force plate 102, signal conditioner 104, and computer 108 for data acquisition. The system may include more than one force plate, and / or signal conditioner. Signal conditioner 104 may be an analog amplifier and / or a digital processor, and may be connected to or embedded within the force plate. Computer 108 may be a personal computer (PC), server, mobile computing device, or computing circuit.

[0037] figure 1 The illustrated force plate 102 is designed to measure the forces and moments exerted by a subject on the force plate upper surface 101 while standing, stepping, and jumping on the force plate. The force plate 102 outputs a force signal to an output port 103 where the force plate 102 can be connected to and in communication with a force signal conditioner 104 .

[0038] Force plate 102 includes one or mor...

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PUM

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Abstract

A method for calibrating a force platform includes, providing a force platform and applying an nXm grid on a top surface of the force platform via a computing device. Next, applying p known loads on each of the nXm grid points of the top surface along a Z-axis being perpendicular to the X and Y axes and along the X and Y axes. Next, taking multipoint measurements at each grid point and for each applied known load along the X,Y and Z axes and generating six measured output signals, exact position coordinates and applied known load magnitude for each grid point. Next, assembling an array of nXmXp of six equations with six unknown for each grid point and applied known load and then solving the assembled equations and deriving a position and load specific calibration matrix for each grid point.

Description

technical field [0001] The present invention relates to a system and method for three-dimensional calibration of force plates, and more particularly to three-dimensional calibration of force plates that provide improved measurement accuracy and reduced crosstalk errors. Background technique [0002] A force plate is a measuring device that measures ground reaction forces. Typically, the force plate is installed in the well pit so that its upper surface is flush with the ground. Then, the subjects were instructed to walk across or stand on the force plate, and the resulting ground reaction forces were recorded. Force plates are commonly used for investigation and clinical research in the fields of biomechanics, medical research, orthopedics, rehabilitation evaluation, prosthetic applications and engineering. In one embodiment, the force plate is used to measure the magnitude of stance sway of a person standing on the force plate. A force plate accomplishes this task by mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00G01L5/00
CPCA61B5/112A61B2560/0223A61B5/1036G01L25/00G01L5/16A61B5/7235A61B2562/0247A61B5/4023A61B5/6887A61B5/1116G01G23/01A61B5/1038
Inventor B·F·怀特F·鲁兰F·J·卡里尼亚A·德儒丁G·格莱斯
Owner ADVANCED MECHANICAL TECH
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