【摘要】 介绍基于极性相关理论的相关流量计。它由正弦波超声传感器和以8098为主体的信号处理部分构成,利用HSI高速输入中断采样越零信号,使采样和运算同时交替进行,加快运算速度,并通过对积分时间、T_max搜索范围和滤波参数的调节,使仪表具有最佳的稳定性和灵敏度。更多还原

【Abstract】 The correlation flowmeter based on polarity correlation theory is introduced. It is composed of sine wave ultrasonic transducer and the signal processing section based on 8098 single chip computer. The zero-across signals are scanned by high speed inputinterrupt (HSI), thus scan and calculation can be operated alternatively for increasing the speed. Also, by adjusting integral time, Tmax searching range andfiltering parameters, the stability and sensitivity of the instrument have been optimised.更多还原