S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
Award Criteria
Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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S&M2706 Research Paper of Special Issue

Monitoring of Grinding Status of Alumina Grinding Wheel Based on Short-time Fourier Transform

Kun-Ying Li, Yue-Feng Lin, Ming-Yi Tsai, I-Cheng Chiu, and Jyun-Yan Chen

(Received May 11, 2021; Accepted September 14, 2021)

Keywords: aluminum oxide grinding wheel, accelerometer, short-time Fourier transform

In this study, an accelerometer was installed on a computer numerical control (CNC) grinding machine, and the vibration signal of the accelerometer was processed by short-time Fourier transform (STFT) to observe the correlation between the wear behavior of the grinding wheel and the characteristic frequency during the grinding process. Two sets of accelerometers were adopted to collect the vibration signal, which was transformed to a time-frequency diagram by STFT. From the time-frequency diagram, it was deduced that the frequency bands of the grinding wheel and the workpiece were 500–700 Hz and 1200–1280 Hz, respectively. According to the comparison between the frequency band and the time-frequency diagram of the sensing signal at the workpiece with surface roughnesses R_a and R_Z, when the spectral energy increased, the surface roughness of the workpiece increased significantly, the self-sharpening was completed at the same time, and the increased surface roughness of the workpiece was maintained.

Corresponding author: Ming-Yi Tsai




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