scholarly journals Smart Table Tennis Racket Using a Rubber Mounted Ultrathin Piezoelectric Sensor Array

2021 ◽  
Vol 33 (3) ◽  
pp. 1081
Author(s):  
Takahiro Yamashita ◽  
Takeshi Kobayashi
Keyword(s):  
Sensor Array ◽  
Piezoelectric Sensor ◽  
Table Tennis ◽  
Tennis Racket

Baseline-free sensor fault detection for piezoelectric array

2021 ◽  
pp. 1045389X2110188
Author(s):  
Qibo Mao ◽  
Yuande Wang ◽  
Shizuo Huang
Keyword(s):  
Prior Knowledge ◽  
Frequency Response Function ◽  
Sensor Array ◽  
Piezoelectric Element ◽  
Piezoelectric Sensor ◽  
Steel Beam ◽  
Sensor Fault ◽  
Pass Filter ◽  
Sensor Fault Detection ◽  
High Pass

In this study, a new methodology is presented to detect the sensor fault for piezoelectric array based on the filtered frequency response function (FRF) shapes. The proposed method does not require prior knowledge about healthy piezoelectric array. First, the imaginary parts of FRFs from the piezoelectric array during vibration are measured and normalized to obtain the FRF shapes in different frequencies. Then the irregularities in these FRF shapes are extracted by using high-pass filter with properly chosen cut-off frequency. These abnormal irregularities on the filtered FRF shape curves indicate the location of the faulty sensor, due to the irregularity of FRF shapes introduced by the faulty piezoelectric element. The proposed sensor fault method is experimentally demonstrated on a clamped-clamped steel beam mounted with piezoelectric buzzer array. Two common piezoelectric sensor fault types including sensor breakage and debonding are evaluated. The experimental results indicate that the proposed method has great potential in the detection of the sensor fault for piezoelectric array as it is simple and does not require the FRF data of the healthy sensor array as a baseline.

The Wood Composite Materials of Table Tennis Bat and Batting Techniques

2012 ◽  
Vol 583 ◽  
pp. 49-52
Author(s):  
Zhong Hai Wang ◽  
Ru Jian Yuan ◽  
Xiao Bing Fan
Keyword(s):  
Composite Materials ◽  
Material Science ◽  
High Performance ◽  
Technical Innovation ◽  
Wood Composite ◽  
Table Tennis ◽  
Tennis Racket

With the table tennis technical innovation and improvement of science, high-performance materials are used to manufacture of table tennis plate floor and help athletes have achieved better results. This article elaborated the wood composite materials’s impact on batting techniques through the analysis of the function of table tennis racket floor and its structure and capacity based on material science for provide the reference on manufacturing and selecting of table tennis racket.

Baseplate of Table Tennis Racket: Allocation for Material Innovation and Playing Methods

2013 ◽  
Vol 440 ◽  
pp. 325-328
Author(s):  
Ming Liang Yang
Keyword(s):  
Technological Development ◽  
Table Tennis ◽  
Tennis Racket

The table tennis racket has played an important role in the development of promoting the table tennis. This paper will analyze the influence of the change of the racket baseplate on the table tenniss technological development, and various requirements on the performance of the racket baseplate by different table tennis batsmanship, and conclude the mutual promoting and influencing relationship between the materials of the baseplate of table tennis racket and the batsmanship, and then to coordinate the baseplates performance and the technology of the table tennis athletic, and to maximize the techniques and tactics levels of the athletic.

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