A positioning system and method for an orchard monorail conveyor based on UHF RFID

Abstract

The invention relates to a UHF RFID-based orchard monorail conveyor positioning system and method. On the basis of the monorail track and the conveyor, a main control processor, an RFID reader, the first and second RFID unidirectional antennas and multiple wireless The source anti-metal tags form the UHF RFID positioning system, and realize the real-time perception of the on-orbit position information of the orchard monorail transport aircraft by processing and calculating the RSSI data. This positioning method has strong applicability, and the RFID reader can read the on-orbit tag data without contact under non-line-of-sight conditions, and is not affected by light and branches and leaves; the first and second RFID unidirectional antennas are used to read the corresponding RSSI data The comparison method is used to reduce the impact of the fruit tree canopy and terrain changes on the wireless signal propagation in the working environment, thereby reducing the positioning error of the transport aircraft and improving the positioning accuracy.

Description

Technical field [0001] The invention relates to the technical field of agricultural machinery positioning, in particular to an orchard monorail conveyor positioning system and method based on ultra-high frequency RFID. Background technique [0002] The Lingnan area of ​​my country is rich in lychees, oranges and other good Lingnan fruits. Affected by the regional topography, orchards are mostly distributed in hills and mountains. Mountain orchards have poor site conditions and uneven terrain. Plant protection operations, agricultural materials and fruit transportation mainly rely on manual or small agricultural vehicles and other transportation methods, which are low in efficiency, labor intensive, and high in labor costs. The operating environment has hidden safety hazards. Ordinary wheeled or crawler tractors are not suitable for operation in large slope mountain orchards, and it is difficult to form a complete transportation network. The monorail conveyor has the characterist...

AI Technical Summary

Problems solved by technology

However, the application cost of this type of positioning technology is high, and the positioning results are affected by light and shading of branches and leaves, so it is not suitable for densely planted orchards

As a typical representative technology of absolute position perception methods, GPS (Global Positioning System) is suitable for the positioning of agricultural machinery in large-area flat farmland. In mountainous orchards, changes in the canopy of fruit trees and terrain will seriously affect its signal propagation, thus limiting the positioning accuracy.

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