摘要
针对双传感器涡街流量计，提出采用频域相减与频率方差计算相结合的方法来处理涡街流量传感器输出信号，并研制基于低功耗单片机为核心的处理系统，取得很好的实验效果。在涡街流量信号功率小于振动噪声功率的情况下，抗振型低功耗数字涡街流量计仍然能够准确地测量流量的频率，并且低功耗、两线制工作。
An algorithm combing frequency-domain substation with frequency-variance calculation is proposed for the vortex flowmeter with two sensors. A signal processing system is developed with super-low power MCU, and a good experimental results are obtained. This type of flowmeter can measure the frequency of the flow-rate accurately even if the power of vortex flow signal is less than that of vibration noise, and can work in the mode of low-power and two-wire.
出处
《计量学报》
CSCD
北大核心
2013年第5期435-440,共6页
Acta Metrologica Sinica
基金
国家自然科学基金（61074164）
关键词
计量学
涡街流量计
双传感器
振动噪声
频率方差
低功耗
Metrology
Vortex flowmeter
Two piezoelectric sensors
Vibration noise
Frequency-variance
Low power
