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Tennis racket string elastic force measuring device and method

A measuring device and measuring method technology, applied in the direction of racket, string racket, sports accessories, etc., can solve the problems of tennis racket elasticity slowly decreasing, affecting athletes' performance, tennis racket has no exact elasticity size index, etc., to achieve elasticity The effect of high size accuracy, simple and easy-to-operate measurement methods

Inactive Publication Date: 2016-05-04
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the above technologies, the present invention provides a device for measuring the elastic force of the tennis racket wire, which can conveniently and quickly measure the elastic force of the tennis racket wire, and solves the defect that the tennis racket does not have an exact elastic force size index in the prior art. Avoid the problem of affecting the performance of athletes due to the slow reduction of the elasticity of the tennis racket

Method used

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  • Tennis racket string elastic force measuring device and method
  • Tennis racket string elastic force measuring device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the tennis racket string elasticity measuring device of the present invention includes a horizontal base 2 and a vertical connecting rod 3 fixed on the base, the upper surface of the base 2 is provided with a fixing device 1 for fixing the tennis racket, and the fixing device 1 is More than two clips or fixing bolts, preferably 4 fixing bolts in the present embodiment; a sliding ruler 4 is provided along the direction of the connecting rod 3, and two horizontal bars that are placed up and down and can move up and down are arranged above the connecting rod 3 The support plate 5, the distance between the upper and lower support plates and the distance from the lower support plate to the base are measured by the sliding ruler 4, and the two support plates 5 are respectively provided with round holes, and the upper and lower two round holes are corresponding and round. The hole also corresponds to the center of the tennis racket fixed on the base...

Embodiment 2

[0027] A method of measuring utilizing the measuring device described in embodiment 1, comprising steps as follows:

[0028] S1. Move up and down to adjust the positions of the two support plates 5, and use the sliding ruler 4 to measure the distance between the upper and lower support plates 5 and the distance from the lower support plate 5 to the base 2; place the tennis racket on the base 2 for use It is kept level, and the tennis racket is fixed with 4 fixing bolts 1 .

[0029] S2. Freely drop the tennis ball 8 from the round hole of the lower support plate 5 to make the tennis ball do a free fall movement. The tennis ball 8 falls to the center of the tennis racket and rebounds upwards and rises to the highest point.

[0030] S3, record the whole process of step S2 with the rangefinder 6, and transmit the recorded data to the test host 9 in real time. The sampling frequency of the rangefinder 6 in this embodiment is 10Mbps, and the trajectory of the tennis ball can be accu...

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Abstract

The invention provides a tennis racket string elastic force measuring device which comprises a horizontal base and a vertical connection rod fixed to the base, the upper surface of the base is provided with a fixing device for fixing a tennis racket, a sliding straightedge is arranged in the direction of the connection rod, the upper portion of the connection rod is provided with two horizontal supporting plates which are vertically arranged, the two supporting plates are provided with round holes respectively, the upper round hole and the lower round correspond to each other and further correspond to the center of the tennis racket fixed to the base, and a diastimeter is arranged at the position of the round hole in the upper supporting plate and connected with a test host. By means of the device, the elastic force of the tennis racket string can be measured conveniently and rapidly, the defect that in the prior art, no index for defining the magnitude of elastic force exists, and the problem that the performance of an athlete is influenced due to the fact that the elastic force of the tennis racket is gradually decreased is solved.

Description

technical field [0001] The invention relates to a tennis racket net line elasticity measuring device and a measuring method, belonging to the technical field of tennis racket quality testing. Background technique [0002] At present, more and more people like tennis. The choice of tennis racket is an important link. A heavy tennis racket will make the players slow down when swinging the racket. A tennis racket that is too light is not easy to deal with strong balls, and it is easy to copy . The general experience is: the weight of tennis rackets suitable for young and strong people is 320~330g, and the weight of tennis rackets suitable for middle-aged and elderly people is 300~320g. Vinyl fiber, no matter what kind of network cable is used, with the increase of time and frequency of use, the elasticity of the network cable will gradually decrease with the aging of the material. At present, there is no exact index for the size of the elastic force, and the commonly used one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A63B51/005
CPCA63B51/005
Inventor 刘鲁君荣思军
Owner SHANDONG JIANZHU UNIV
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