Technology can provide safety in physical practices and improving the
performance of these activities, so manufacturing of equipments for these
purposes has been considered widely. The aim of the present paper was design
and fabrication of three-axis accelerometer. hree acceleration sensors, three
gyroscopes for angular velocity measurement, a microcontroller for converting
analog data to digital, a semiconductor memory for storing the sampled data, a
rechargeable battery and a spreadsheet in MATLAB environment have been
used. In order to examine the validity of fabricated instrument, the earth gravity
acceleration in three perpendicular axes have been measured and compared
with 9.8m/S2. In order to examine the reliability of the fabricated accelerometer
the ICC and test-re-test method have been used. The results showed that the
accelerometer has both reliability and validity. Due to its special features, it
enables us to sample in the offline mode and wireless manner. Such system
may be used for