Abstract
Machine tools play key roles in modern manufacturing industry. The quality of machined products is largely depended on the status of machines in various aspects such as vibration and appropriate vibration monitoring would be essential for both quality control and the safety and life assessment of machine tools. However, currently used piezoelectric or MEMS based accelerometers all have their own sensitivity and bandwidth limitations and may not suitable for machine tool monitoring, where both high sensitivity and high bandwidth are required. In this work, a design to form a vibrating sensing module by integrating several MEMS accelerometers with different dynamic characteristics is proposed and investigated. By such an approach, a low cost accelerometer with superior dynamic behavior at any frequencies expected. This work presents the preliminary study toward this goal, including overall conceptual design, sensor calibration, amplification and signal conditioning circuits layout, and preliminary integration, testing, and demonstration on a CNC machine tool. The primary test results are promising and it is believed that the design would play important role in future machine monitoring tasks.
Highlights
With the expeditious development of technology, the claim of Industry 4.0 has been advocated in order to accelerate productivity and decrease production cost
We mainly present the efforts on MEMS accelerometers integration and circuitry layout for signal processing as the first step toward the final goal
The primary test results on the dynamic performance characterization indicated that those MEMS accelerometers are potentially capable for measuring vibrations of machine tools
Summary
With the expeditious development of technology, the claim of Industry 4.0 has been advocated in order to accelerate productivity and decrease production cost. Among all possible physical signals, machine vibration is particular meaningful for condition monitoring of machine tools, where the sources of vibration are quite complicate, such as gear meshing, bearing damage, shaft rotation imbalance, and chattering during cutting. Vibrations caused by these sources have different time and frequency characteristics and usually distributed in a range around 10 kHz. Traditionally, piezoelectric accelerometers have been used for measuring vibrations in this domain(2). A single piezoelectric accelerometer may not capable to faithfully measure the vibration of high speed machine tools due to its tradeoff between sensitivity and bandwidth. It is expensive and the available space constrained by hiring multiple piezoelectric accelerometers
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call