Temperature-Compensated Spread Spectrum Sound-Based Local Positioning System for Greenhouse Operations

被引：4
|
作者：
Tsay, Lok Wai Jacky [1 ]
Shiigi, Tomoo [2 ]
Huang, Zichen [1 ]
Zhao, Xunyue [1 ]
Suzuki, Tetsuhito [1 ]
Ogawa, Yuichi [1 ]
Kondo, Naoshi [1 ]
机构：
[1] Kyoto Univ, Grad Sch Agr, Kyoto 6068502, Japan
[2] Natl Fisheries Univ, Dept Ocean Mech Engn, Shimonoseki 7596595, Japan
来源：
IOT | 2020年 / 1卷 / 02期
关键词：
spread spectrum sound; positioning system; sound velocity; TOA localization algorithm; ROBOT;
D O I：
10.3390/iot1020010
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
A spread spectrum sound-based local positioning system (SSSLPS) has been developed for indoor agricultural robots by our research group. Such an SSSLPS has several advantages, including effective propagation, low cost, and ease of use. When using sound velocity for field position measurements in a greenhouse, spatial and temporal variations in temperature during the day can have a major effect on sound velocity and subsequent positioning accuracy. In this research, a temperature-compensated sound velocity positioning was proposed and evaluated in comparison to a conventional temperature sensor method. Results indicate that this new proposed method has a positioning accuracy to within 20 mm in a 3 m x 9 m ridged greenhouse. It has the potential to replace the current system of using the temperature sensors in a greenhouse.
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页数：14
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