Method and device for measuring the swing angle of the hanging basket of the arm centrifuge
[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 conditions.The ground controller received the data for scientific analysis and modeling,establishing the functional relationship between the swing angle of the hanging basket and the output parameters of the pore water pressure sensor.This enabled real-time online measurement of the swing angle.[Results and Conclusions]The test results indicated that the proposed method successfully achieved real-time online measurement of the swing angle of the arm centrifuge's handling basket under supergravity conditions.The constructed experimental test platform operated normally and stably at 150 g supergravity,meeting the measurement target for the swing angle of the geotechnical centrifuge's hanging basket.The test platform exhibited high stability and strong maneuverability.This study effectively resolves the challenge of angle measurements in extreme hypergravity environments in our country,providing valuable reference importance for developing hypergravity measurement methods and devices.
sensing technologygeotechnical centrifugeswing anglesupergravity field
万方数据
维普
