Development of tilt and vibration measurement and detection system using MEMS accelerometer as a sensor
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Date
2008-07
Authors
Khairul Anuar Abd Wahid
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Abstract
In this project, a measurement and detection system to detect tilt angle signal and vibration
signal using MEMS accelerometer which has two sensed axes X and Y was successfully
developed. Several issues are considered while developing the measurement system such as
sensor specifications, software used for programming, device for interfacing and the
flexibility of the software used. In this system the sensor specification such as low pass filter
can be adjustable for intended applications. This filter is used for reducing the noise from
output signal MEMS. This filter uses a capacitor valued 0.47uF with bandwidth of 10Hz.
The bandwidth needs proper setting in order to improve the resolution and range of dynamic
output signal. Available systems usually use different device and software for different tasks
such as acquiring the output signal, processing and displaying the data into a meaningful
signal. In this project the developed measurement system uses software which enables it to
perform those tasks simultaneously. Moreover, the developed system can be easily set for
signal acquisition. From the experiments carried out, the developed tilt measurement system
can successfully measure tilt angle accurately from 0° to 90°. The measured tilt angle signal
are compared with real sensed angle, and the results are also compared with equation. The
measured vibration signal and the reliability of vibration measurement system developed in
this project are compared with commercial device IMC-CSSOOS. This vibration
measurement system is tested under vibration frequency starting from 5Hz to 500Hz with
1000Hz, 5000Hz and 50000Hz sampling rate. The characteristics of the vibration signal
measured in sinusoidal form including positive peak acceleration (ms·2
), RMS value and the
amplitude of frequency domain using Fast Fourier Transform technique are verified. In
conclusion, a measurement and detection system using MEMS as a sensor to detect tilt angle
signal and vibration signal is successfully developed.
Description
Keywords
To detect tilt angle signal and vibration signal , using MEMS accelerometer