2020
DOI: 10.3390/iot1020010
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Temperature-Compensated Spread Spectrum Sound-Based Local Positioning System for Greenhouse Operations

Abstract: 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 posi… Show more

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Cited by 4 publications
(1 citation statement)
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“…To reduce the time consumed in manual deployment and calibration, Widodo et al ( 2013 ) subsequently designed a self-calibrating acoustic positioning system. Huang et al ( 2020a ) proposed a spread spectrum sound-based local positioning system for greenhouse robots, and Tsay et al ( 2020 ) added a temperature compensation on this basis. In addition to a sound-based positioning system, Preter et al ( 2018 ) designed a strawberry harvesting robot, which uses an ultra-wideband indoor positioning system, wheel encoders, and a gyroscope to achieve positioning and navigation in the greenhouse.…”
Section: Introductionmentioning
confidence: 99%
“…To reduce the time consumed in manual deployment and calibration, Widodo et al ( 2013 ) subsequently designed a self-calibrating acoustic positioning system. Huang et al ( 2020a ) proposed a spread spectrum sound-based local positioning system for greenhouse robots, and Tsay et al ( 2020 ) added a temperature compensation on this basis. In addition to a sound-based positioning system, Preter et al ( 2018 ) designed a strawberry harvesting robot, which uses an ultra-wideband indoor positioning system, wheel encoders, and a gyroscope to achieve positioning and navigation in the greenhouse.…”
Section: Introductionmentioning
confidence: 99%