Tennis ball speed estimation system based on sensor
A sensor and motion sensor technology, applied to rackets, sports accessories, etc., can solve the problems of high cost of use and low data accuracy, and achieve the effect of low cost of use and strong practicability
Inactive Publication Date: 2019-08-02
北京冬临科技有限公司
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[0004] The purpose of the present invention is to provide a sensor-based tennis ball speed estimation system to solve the problem of high cost and low data accuracy of the existing tennis ball speed measurement method proposed in the background art
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[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0015] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal" etc. is based on the orientation or positional relationship shown in the drawings, and is only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific o...
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The invention discloses a tennis ball speed estimation system based on a sensor. The system comprises a movement sensor and an estimation system, wherein the movement sensor is arranged in a positionof a racket rod of a tennis ball racket, wherein the movement sensor consists of a triaxial accelerometer and a triaxial gyroscope; the movement sensor collects the racket waving acceleration and thereading of the gyroscope; the movement sensor is connected with a mobile terminal through bluetooth; the collected data is transmitted onto the mobile terminal; the collected value is subjected to value processing and ball speed calculation through the estimation system arranged in the mobile terminal. Through the comparison results of a plurality of groups of data, the tennis ball speed estimation system based on the sensor has the advantages that the precision is 10.8 percent higher than that of similar representative products on the market; the use cost is lower; the practicability is higher; meanwhile, the volume of the movement sensor per se is small, so that the problems of addition hinder burden on a user in the use process, the value calculation influence, and the like cannot occur.
Description
technical field [0001] The invention belongs to the technical field, and in particular relates to a sensor-based tennis ball speed estimation system. Background technique [0002] With the increasingly fierce tennis competition, tennis is more and more pursuing the speed and power of hitting the ball. A strong serve can help athletes take the initiative, force the opponent to make mistakes, and then create scoring opportunities. In recent years, the highest serve in tennis The speed is broken again and again, reflecting the importance athletes attach to the speed of tennis balls. [0003] At present, there are two main methods for estimating the speed of tennis balls: the first one is based on machine vision. This method requires the installation of multiple high-speed cameras on the tennis court. The cameras capture the trajectory of the tennis ball in real time and calculate the speed of the tennis ball through machine vision algorithms. The method has high precision, but...
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IPC IPC(8): A63B60/46A63B69/38
CPCA63B69/38A63B2220/30A63B2220/40A63B2220/803A63B60/46
Inventor 赵弘阳
Owner 北京冬临科技有限公司