【摘要】 针对传统光学浊度仪量程小、测量结果易受环境因素干扰等问题,对传统浊度测量方法及超声波衰减模型进行了研究。提出了利用超声波衰减测量混合液浊度的方法,基于虚拟仪器及硬件模块的结合,设计了一套超声波衰减测量系统;以沙土为实验对象配置混合液进行了实验,完成了超声波衰减、浓度、浊度之间的关系探究实验。实验结果表明:在泥沙混合液中,超声波衰减系数与混合液浓度之间存在良好的线性关系,拟合曲线的拟合度大于0.97,并且浓度与混合液浊度同样存在良好的线性关系,拟合曲线的拟合度为0.995;通过利用超声波衰减测量大浊度混合液浊度值方案可行。更多还原

【Abstract】 Aiming at the problems that the traditional optical turbidimeter has small measuring range and the measurement result is easily interfered by environmental factors, the traditional turbidity measurement method and ultrasonic attenuation model were studied. A method of measuring the turbidity of the mixed liquid by ultrasonic attenuation was proposed, and based on the combination of virtual instruments and hardware modules,a set of ultrasonic attenuation measurement system was designed. The sand was used as the experimental object to carry out the experiment, and the relationship between ultrasonic attenuation, concentration and turbidity was completed. The experimental results show that in the sediment mixture, and there is a good linear relationship between the ultrasonic attenuation coefficient and the concentration of the mixture. The fitting curve fits more than 0.97. The liquid turbidity also has a good linear relationship, and the fitting curve has a fitting degree of 0.995. It is feasible to measure the turbidity value of the large turbidity mixture by using ultrasonic attenuation.更多还原