Effect of Soil Particle Size on the Accuracy of Tactile Pressure Sensors

被引:4
|
作者
Kootahi, Karim [1 ]
Leung, Anthony Kwan [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
Tactile pressure sensor; Stress measurement accuracy; Soil particle size effect; PERFORMANCE;
D O I
10.1061/(ASCE)GT.1943-5606.0002899
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
This paper investigates the effects of soil particle size on the measurement accuracy of single-point type tactile pressure sensors when used for measuring soil contact stresses. Sensors with two different diameters (D-sens) are integrated into an oedometer cell. Granular materials with a wide range of particle diameters (D-50) and angularities (from rounded to irregular shaped) are evaluated, resulting in a wide range of ratios of D-sens/D-50 from 2.6 to 105.8. The test results show that the soil particle size significantly affects and exponentially correlates with the measurement accuracy of the sensor. A threshold D-sens/D-50 of 10.5 is identified for the sensor, beyond which the error is less than 5%. It is also shown that even for ratios of D-sens/D-50 as large as 40, an error of approximately 2% can be observed, which is intrinsic to the sensor. (C) 2022 American Society of Civil Engineers.
引用
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页数:10
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