A positioning and navigation system and method for an AGV trolley based on RFID and ultrasonic waves

Abstract

The invention discloses an AGV positioning navigation system and method based on RFID and ultrasonic waves. The system is characterized by comprising n vehicle-mounted terminals and a monitoring service center, the n vehicle-mounted terminals are used for finishing a plurality of distribution tasks in the indoor work environment, and any vehicle-mounted terminal comprises a vehicle-mounted Wi-Fi communication module, an RFID and ultrasonic positioning module and a control module. The monitoring service center comprises a Wi-Fi communication module, a route management module, a GIS search engine and a database. A layout graph of the indoor work environment is saved in the database. The synchronization problem caused when emitting and receiving of ultrasonic waves are not on the same side is solved on the system level by means of the positioning technology combining RFID and ultrasonic waves. Positioning precision of an AGV is improved by means of the positioning algorithm of a least squares support vector machine.

Description

technical field [0001] A positioning and navigation system and method for an AGV trolley, more specifically a positioning and navigation system and a method for an AGV trolley based on RFID and ultrasonic waves. Background technique [0002] At present, there are many studies on the positioning and navigation methods of AGV cars, mainly including: visual navigation and positioning, light reflection navigation and positioning, electromagnetic navigation and positioning, and sound navigation and positioning. [0003] Visual navigation and positioning: its image processing has a large amount of calculation, and the computer must achieve real-time processing speed, which is difficult to achieve on a general computer; [0004] Optical reflection navigation technology: its positioning mainly uses laser or infrared sensors to measure distances. Laser ranging is greatly disturbed by environmental factors. Therefore, how to denoise the collected signals when using laser ranging is al...

AI Technical Summary

Problems solved by technology

[0003] Visual navigation and positioning: its image processing has a large amount of calculation, and the computer must achieve real-time processing speed, which is difficult to achieve on a general computer;

[0004] Optical reflection navigation technology: its positioning mainly uses laser or infrared sensors to measure distances. Laser ranging is greatly disturbed by environmental factors. Therefore, how to denoise the collected signals when using laser ranging is also a relatively big problem. There are also blind spots in laser ranging, so it is difficult to realize navigation by laser alone;

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