A novel method of measuring phase deviation signal for Coriolis mass flow meter

摘要

A new phase deviation signal detecting method based on signal capture technology is presented to deal with the signals of double u-shaped Coriolis mass flow meter. By using the method, MCU (micro control unit) can get the whole oscillating information of the flow sensor, including normal phase deviation signal being proportional to mass flow rate and signal draft caused by noises. MCU can easily identify and delete the combined interfering signals by a simple algorithm in the software. And it can improve the anti-jamming ability and measurement accuracy. The method was implemented by using high performance MSP430F149 MCU of the Texas Instrument company. This simplified the hardware system of the signal processing board and reduced the price and energy consumption greatly.