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《Journal of Vibration and Shock》 2015-22
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Bone milling condition monitoring based on sound signal processing

DAI Yu;XUE Yuan;ZHANG Jian-xun;Institute of Robotics and Automatic Information System,Nankai University;Orthopedics,Tianjin Medical University General Hospital;  
In consideration of that the sound can provide useful informations about tool-tissue contact,the condition monitoring was realized by acquiring and analyzing the sound signal during laminectomy surgery. A differential equation was presented to describe the vertebral lamina vibration excited by the cutting force,and it is proved that the vibration amplitude will increase as the thickness of the bone decreases. Discrete wavelet transform was performed to extract the harmonic components whose frequencies are integer multiples of spindle frequency from the sound pressure signal,the products of wavelet energy at some special scales were calculated to judge the milling status. The proposed condition monitoring method was experimentally verified through the milling operation in porcine spines,and the results indicate that the product of wavelet energy will increase significantly when the vertebral lamina is going to be penetrated.
【Fund】: 国家自然科学基金资助项目(61403212);; 天津市应用基础与前沿技术研究计划资助项目(14JCQNJC04600)
【CateGory Index】: TN911.7
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