科里奥利质量流量计变送器新型硬件设计

New Hardware Design of Coriolis Mass Flowmeter Transmitter

文章以DSP为基础,进行应用于汽车压缩天然气流量测量的科里奥利质量流量变送器的设计与研究,其硬件电路主要由左右通道信号采样电路、信号处理电路和驱动放大电路及温度检测补偿电路组成。新型采样电路可以减少电子零点误差,并通过音频编解码器内部ADC采集传输给DSP,进行相位差计算。

The article is based on DSP and applied to the flow of compressed natural gas in automobiles.The design and research of the measured Coriolis mass flow transmitter,its hardware circuit is mainly composed of left and right channel signal sampling circuit,signal processing circuit,drive amplifier circuit and temperature detection compensation circuit.The new sampling circuit can reduce the electronic zero error,and is collected and transmitted to the DSP through the internal ADC of the audio codec for phase difference calculation.