Research On Three-Dimensional Sport Testing And Analyzing System Based On LabVIEW

With the development of sports competition,the recent training devices obviously can't satisfy the need of scientific training under the information-based condition.In order to accelerate the pace of scientific training,to meet the need of information-based construction,the concept of the system of strength quality testing and evaluating is brought forward.This kind of system is a combination of electrical device and intellectual control,which will have great vitality in a long time later. The system talked about in this article is developed based on LabVIEW and data acquisition card with USB interface,which can instantaneously analyzing the data while it is acquiring them.With the calculating and processing of the data,the training state of athletes can be found out.Traditionally,people use image method to evaluate the result of training.That is,to photograph the course of training,and then do some simple calculation to get the displacement,velocity,and acceleration according to the video.This kind of method commonly has the frequency lower than 50HZ and needs to fix the point artificially,which results in low accuracy,not real-time,and brings a lot of tedious work after the training.Obviously this method can not fit the development of scientific training.LabVIEW is a graphic programming language developed by the National Instrument of the USA.By using the virtual instrument and dynamic display characteristic of LabVIEW,the user's interface with dynamic display and interaction is then formed.With the help of the acquisition card and LabVIEW,the whole data acquisition and analyzing work can be done.In recent years,the demand of virtual instrument is increasing by 20%per year.The global demanding quantity of virtual instrument is huge,which is 40,000,000,000 dollars.Virtual instrument is the substitution of traditional instrument,with the higher needs and the upgrade of computers,virtual instrument will develop with the direction of USB interface. USB(Universal Serial Bus) is used in more and more field as a new data communication interface.Comparing to the traditional PCI and ISA card,the card with USB interface has the advantage of convenience,higher speed of data transmission,price and so on.In the past,there was some research on one-dimensional testing system,that is movement in one direction.This kind of system can only analyze simple training such as lifting the barbell.While using this system based on LabVIEW and acquisition card.with USB interface,we can analyze much more complicated movements.It has also overcome the disadvantages of the image method.