Abstract
Measuring a large amount of parameters of work piece, resistance strain gage will have to use many resistive signal conversion boxes and long electric wires. Data acquisition becomes slow, inaccurate and discontinuous. Disorder and thermal of contact potential in the contacts affect the measurement signal and converting precision. In this paper, a wireless portable resistance strain gage is developed. ATmega16 is an 8-bit embedded and high-speed AVR single-chip microcomputer with 16k FlASH, and that is the core of system. Amplifier is designed to amplify and filter micro-voltage signals to improve measure accuracy. Wireless Bluetooth technology links ATmega16 and PC. Visual Basic software displays and processes data from ATmega16 in real time. This system is small in size and highly reliable, strong anti-interference ability and better economic performance.
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