臂式离心机吊篮摆动角的测量方法及装置  

Method and device for measuring the swing angle of the hanging basket of the arm centrifuge

作　　者：闫子壮 刘代峰 洪帅 YAN Zizhuang;LIU Daifeng;HONG Shuai(High Gravity Research Center,Zhejiang University,Hangzhou 310058,China;Key Laboratory of Soft Soil and Environmental Geotechnics,Ministry of Education,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学超重力研究中心,浙江杭州310058 [2]浙江大学软弱土与环境土工教育部重点实验室,浙江杭州310058

出　　处：《实验技术与管理》2024年第9期15-21,共7页Experimental Technology and Management

基　　金：国家自然科学基金基础科学中心项目(51988101);浙江大学实验技术研究项目(SYB202112)。

摘　　要：为解决超重力环境下角度测量存在的不足,尤其是臂式离心机吊篮摆动角无法准确测量的问题,该文提出一种基于应变式静态孔压传感器的离心机吊篮摆动角监测方法,搭建了一套高精度实时在线测量装置。选用高精度静态孔压传感器,安装在亚克力水箱内,将水箱放置于离心机吊篮平台,设计数据采集仪布设于离心机旋转中心,采集测量数据上传至地面控制器。控制器接收数据后,进行科学分析建模,建立吊篮摆动角与静态孔压的函数关系,从而实现对吊篮摆动角的实时在线测量。测试结果表明,此方法可以实现超重力150 g(重力加速度)环境下,对臂式离心机吊篮摆动角的实时在线测量。[Objective]To address the challenges of angle measurements in extreme supergravity environments,particularly the inability to accurately measure the swing angle of the hanging basket in an arm geocentrifuge,this study proposes a monitoring method using a strain-type pore water pressure sensor.[Methods]A high-precision real-time online measurement device was built,encompassing design processing,production,debugging,and testing to create a comprehensive online measurement system.The approach begins with the design and selection of a high-precision strain-type pore water pressure sensor known for its stable performance.After rigorous testing in a supergravity environment of 150 g,the sensor demonstrated stable performance,strong operability,and high precision,making it reliable for use.The sensor underwent scientific calibration to establish parameters for subsequent experiments.It was installed in an acrylic transparent water tank at a uniform height along a straight line,with the tank box featuring a scale to display the water level in real time.The water level represents the real-time pressure measured by the pore water pressure sensor.The tank was placed in the centrifuge basket platform and securely fixed with bolts.The experimental platform was adjusted to ensure it remained centered within the centrifuge basket.Three monitoring camera systems were deployed to effectively monitor the water level of the model water tank in real time,and the entire experimental equipment was installed and fixed.Critical precision components,such as the data acquisition instrument,were placed at the centrifuge rotation center,where centrifugal acceleration and forces are minimal.The experimental setup connected sensors,camera systems,and high-voltage and weak current systems,facilitating data acquisition and storage.An optical fiber system at the centrifuge slip ring,including fiber optic converters and switches,was used at the centrifuge slip ring to enable remote data transmission between normal gravity and supergravity conditi

关 键 词：传感技术 土工离心机 摆动角 超重力场 

分 类 号：TP206.1[自动化与计算机技术—检测技术与自动化装置]