Development of a low cost two axis force sensor
This paper presents a low cost smart two axis force sensor with Analog-to-Digital (RS232 and SPI) interfaces, especially suitable for measuring low and moderate forces. A mechanical structure is made by rapid prototyping machine. Pair of resistive sensor is used for each axis. A computer contro...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Foundation for Modern Education and Scientific Research, IFOMESR
2013
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/29707/1/W13-E-0003_%282013%29.pdf |
| Summary: | This paper presents a low cost smart two axis
force sensor with Analog-to-Digital (RS232 and SPI)
interfaces, especially suitable for measuring low and
moderate forces. A mechanical structure is made by rapid
prototyping machine. Pair of resistive sensor is used for
each axis. A computer controlled 12-bit A/D converter is
employed to obtain a higher resolution. The nonlinear
output of the sensor converts to linear output by piecewise
linearization technique. A digital 60 Hz notch filter is
implemented in the micro computer for rejecting the Ac
supply noise. Third order digital FIR filter is used for
removing noise from final output. Filtered data is
converted into pulse width modulation where duty cycle is
proportional to applied force. The filtered data is
converted into Digital RS232 and SPI format for
interfacing the digital world. Finally the performances of
the sensor have been justified. |
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