The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2022
Filed:
Jul. 23, 2020
Wuyi University, Jiangmen, CN;
Tianlei Wang, Jiangmen, CN;
Na Xiao, Jiangmen, CN;
Yijia Deng, Jiangmen, CN;
Junjie Xu, Jiangmen, CN;
Zijian Li, Jiangmen, CN;
Jingling Zhang, Jiangmen, CN;
Yikui Zhai, Jiangmen, CN;
Jiangyuan Chen, Jiangmen, CN;
Chaojian Xie, Jiangmen, CN;
Yiren Long, Jiangmen, CN;
Wuyi University, Jiangmen, CN;
Abstract
Disclosed is a device for measuring speed of a tennis ball, which includes: a housing, a power supply, a main control device, a sensor device, a transmission device, a clamping device and a limiting device. The clamping device is clamped at the serve opening of a tennis ball machine, which can detect the serve speed of a tennis ball accurately with simple operation. The transmission device is engaged with the second sensor device, and the housing is slidably connected with the second sensor device. The emitting ends of the second sensor device and the first sensor device are positioned in the same vertical plane. The limiting device is connected with the second sensor device to limit excessive operation of the transmission device.