用于疏浚工程泥浆密度测量的电阻层析成像技术  

Electrical Resistance Tomography for Slurry Density Measurement in Dredging Engineering

作　　者：崔自强 张倩 夏子涵 高凯 王化祥 CUI Ziqiang;ZHANG Qian;XIA Zihan;GAO Kai;WANG Huaxiang(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072

出　　处：《传感技术学报》2021年第3期291-296,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金面上项目(61671319);国家自然科学基金国家重大科研仪器研制项目(61627803)。

摘　　要：江河湖海疏浚工程对于拓展和保障航运安全、促进生态恢复、维护/改善远海岛礁环境具有不可或缺的作用。目前,在绞吸和耙吸疏浚船上,多采用射线密度计及电磁流量计对输泥密度、产量等进行在线计量,并作为实现疏浚系统自动控制的重要参量。由于射线密度计潜在的人员健康、公共安全和环保风险,在一些国家和地区已建立了放射源的有序退出机制。电阻层析成像使用安装于管壁的电极阵列获得管道内流体的电导率分布,进而推导出管道内的泥浆密度,具有无辐射、全场测量及实时可视化的优点。电阻层析成像测量系统经过特殊设计,可适应从内陆淡水到海水的巨大电导率变化。初步测试表明,电阻层析成像测量数据与射线密度计具有良好一致性,具备了作为在线泥浆密度测量的可行性。此外,ERT可提供实时的流动成像,对于提高对疏浚管道监测能力和降低堵管概率具有重要意义。In the lakes,rivers,harbors and other water bodies,dredging usually plays an indispensable role in guaranteeing the shipping safety,promoting ecological restoration,maintaining/improving the environment of remote islands and reefs.On the cutter suction dredgers and trailing suction hoppers,the γ-ray densitometers and electromagnetic flow meters have been widely employed for measuring the online slurry density and productivity.These parameters have usually been considered as the most important inputs to the automatic dredging systems.In consideration of the potential risks of the γ-ray densitometer,i.e.,on the health of crew,public safety and environment,an orderly withdrawal mechanism of radioactive sources has been established in many countries and regions.The electrical resistance tomography(ERT)technique utilizes the electrode arrays on the periphery of pipe/vessel to investigate the internal on-going flows,which can reflect the slurry density and distribution.It has the advantages of no radiation,full field measurement and real-time visualization.The ERT measuring system has been carefully re-designed to fit both the in-land and sea water.Preliminary tests show that the developed ERT data are in good consistency with the γ-ray densitometer,demonstrating its feasibility as an online slurry densitometer.Furthermore,ERT can provide the real-time visualization,which is of great significance for monitoring the dredging pipe and reducing the probability of pipe blockages.

关 键 词：电阻层析成像 疏浚 泥浆密度 电导率 射线密度计 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]