Transforming an Optical Pick-Up-Head Into an Accelerometer With UltraHigh Sensitivity

Shao-Kang Hung, Chiao-Hua Cheng, Ming-Li Chiang, Jih-Wei Chieh
2014 IEEE Transactions on Instrumentation and Measurement  
This paper proposes an accelerometer based on a commercial optical pick-up-head (PUH). An optical PUH is used to be part of an accelerometer by transforming the astigmatic measuring mechanism, the suspending wires, and the objective lens as the displacement sensor, the spring, and the seismic mass, respectively. Instead of adding an extra mass-damperspring subsystem into the system in previous works, in our design we utilize the four suspending metal wires and the objective lens in an optical
more » ... H. Thus, no extra component is needed and the system is more compact and easy to implement. Experimental results demonstrate that this cost-effective accelerometer has excellent linearity, ultrahigh sensitivity of 114 V/g, and an operating frequency of 20 Hz.
doi:10.1109/tim.2013.2282427 fatcat:22rrn7inb5bg3dz4hmfrjppu6y