论文部分内容阅读
ADCP运用多普勒原理,通过发射声波脉冲,并聆听经过水中泥沙颗粒等反射物体所反射回来的声波,通过声波的频移计算流速。分别分析了ADCP的测验环境影响因素对其测流时会产生的可能误差。通过在黄浦江上游的测流试验,分析了ADCP在测流时会产生的Ⅰ型误差、Ⅱ型误差,计算其相对误差、相对标准差和随机不确定度。在感潮河段中,ADCP测流的Ⅰ型误差、Ⅱ型误差的完全满足测验规范所允许的误差控制。
ADCP uses the Doppler principle to emit sound pulses and to hear sound waves reflected by reflective objects such as sediment particles in the water. The flow rate is calculated from the frequency shift of the sound waves. The possible errors of the ADCP test environment influencing factors on the flow measurement were analyzed respectively. Based on the flow test in the upper reaches of the Huangpu River, the type I errors and the type II errors that ADCP produces when the flow is measured are analyzed, and the relative errors, relative standard deviations and random uncertainties are calculated. In the tidal reach, the type Ⅰ error and the type Ⅱ error of the ADCP flow completely satisfy the error control allowed by the test specification.