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Method and device for measuring rotation speed of moving ball

A sphere and speed technology, applied in the field of measurement, which can solve the problems of calculation errors, inconvenient realization, and complicated devices.

Active Publication Date: 2012-12-19
成都定为电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (a) The above-mentioned first method, the device is relatively complicated, and a special sphere must be used for measurement, which is inconvenient to implement
[0008] (b) The second method above requires pattern recognition, the calculation process is complicated, and the calculation is not accurate enough. If the rotation angle of the sphere exceeds , it will cause a calculation error

Method used

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  • Method and device for measuring rotation speed of moving ball
  • Method and device for measuring rotation speed of moving ball
  • Method and device for measuring rotation speed of moving ball

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Embodiment Construction

[0097] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0098]Any feature disclosed in this specification, including any appended claims, abstract and drawings, may, unless expressly stated otherwise, be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0099] figure 1 For the scene diagram of the present invention, use the measuring device module 1 or place it in different positions Each receiver module 2, 3, 4 measures the rotational speed and other information of the moving ball 5. Motion sphere module 5 at angular velocity turn at speed move. The transmitting device of the measuring device module 1 sends out transmitting waves, such as microwaves or ultrasonic waves or light waves....

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Abstract

The invention discloses a method and a device for measuring rotation speed of a moving ball. According to the method provided by the invention, an equation or an equation set is constructed by using maximum micro Doppler frequency shift of reflection wave to calculate the rotation speed of the ball body; and the position and the movement speed of the ball body in movement can also be calculated, and data of related movement positions including height over a net of the ball body and a point of fall and data of speed are acquired by using arrival moment and the Doppler frequency shift of the reflection wave. The device comprises an emitter, one or more receivers, output equipment and a central processor. The measuring equipment is simple, and normal movement of the ball body is not affected; and an algorithm is low in complexity and convenient to quickly realize. The device provided by the invention is adopted for measurement; the measurement result is accurate; and the functions are complete.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a method for measuring the moving speed of a rotating sphere. Background technique [0002] For many ball games such as table tennis, football, and tennis, the rotation speed of the ball and other sports data such as moving speed, flying height, and landing point are very important sports characteristics, and they are also data that must be accurately measured in athlete training. Therefore, how to monitor these data has become a very important issue. At the same time, it is difficult for the audience to see the rotation clearly when enjoying these sports on the spot, especially the small and fast items such as table tennis. Therefore, there is a device for monitoring the rotation and displaying the calculation results, which is convenient for the audience to appreciate. [0003] The existing methods for measuring the rotational speed mainly include: [0004] (a) Measurement with se...

Claims

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Application Information

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IPC IPC(8): G01P3/00G01P13/00
Inventor 沈莹全欣唐友喜
Owner 成都定为电子技术有限公司
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