摘要
本文根据超声波在浑水中的衰减规律,提出了一种测量水体中含沙量的新方法.研制出由超声探测传感器、超声仪器和微处理机组合而成的测试系统.在该系统中,提出了“面积比值法”测量声吸收系数,提高了测量的灵敏度和精度.利用保持电路,解决了窄脉冲序列信号的采集和处理问题,保证了测量的稳定性.采用所研制的测试仪器,并配以相应的传感器系列,可望在我国大部分河流中应用.
A new method based on the principle of acoustic absorption in suspensions for the measurement of sediment concentration has been introduced. The whole measuring system consists of transducer, signal conditioning and microprocessor. For improving the precision and sensitivity of the instrument, a 'ratio method' for measuring attenuation coefficient has been taken. By using a set of tranducers with different sensitivity, the range (0-120kg/m3) of sediment concentration can be detected automaticly, and the sensitivity of the instrument is about 0.1kg/m3.
出处
《泥沙研究》
CSCD
北大核心
1990年第2期1-12,共12页
Journal of Sediment Research
