Description: The use of MSPd30F149 chip microcontroller and AIM21 current loop, through a simple voltage to frequency converter (multi-harmonic oscillator) circuit based on power-off-type differential pressure sensor design of intelligent differential pressure transmitter. The design is characterized by the use of voltage to frequency converter circuit to replace the A/D module, a very low price to achieve a high system accuracy. Using a combination of software and hardware signal processing techniques to achieve an agreement based on the HART field bus technology differential analog measurements, using CPLD devices through further quantify the delay frequency measurement techniques, will be able to reach than the traditional A/D device is more high-pressure measurement accuracy. Smart differential pressure transmitter HART protocol field bus MSP430F149 AIM21
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msp430f149单片机在基于现场总线的智能差压变送器设计中的应用.pdf
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