Automatic guidance system based on radio frequency identification tag and vision and method thereof

Abstract

The invention discloses an automatic guidance system and method based on radio frequency identification tags and vision. It adopts a four-wheel structure with two front-wheel steering and two rear-wheel drive. The DC motor is used as the walking drive device, and the steering is driven by the stepping motor, and a wheel angle positioning device is provided, which has a high dynamic response capability. Black and white two-color parallel guide belts are used as the guide path, and radio frequency identification tags are intermittently laid under it, with red station characters on both sides, CCD collects road surface information, and the brightness of the light source is adaptively adjusted according to the grayscale information of the image. Characters are extracted by difference, fast HOUGH transformation is used to identify straight lines, and the control signal is sent to the AGV controller after processing by the industrial computer to control the DC motor and stepper motor. In order to effectively realize the communication scheduling between AGVs in real time, radio frequency identification tags are used to realize positioning, and the wireless transceiver module realizes the communication between AGVs and the host. The invention has good environment adaptability and navigation accuracy, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of logistics equipment, in particular to an automatic guidance system and method based on radio frequency identification tags and vision. Background technique [0002] AGV (Automatic Guided Vehicle) technology is an important manifestation of the advanced nature of production logistics automation. The current guidance method of AGV determines the flexibility of its logistics system, and is a key factor that determines whether AGV can be further applied to more complex and harsh working environments. , which in turn affects the reliability and operating cost of the logistics system. At present, among the guidance methods that have been researched, developed and applied, there are mainly: electromagnetic induction, optical guidance, chemical guidance, magnetic induction, position inference method, reference mark method, inertial navigation method and image recognition method Wait. Among them, visual guidance...

AI Technical Summary

Problems solved by technology

However, in the Chinese market, the existing manufacturers of AGVS based on visual guidance focus on large-scale warehousing and consider versatility more, and the functions are too numerous. In addition to technical routes and other reasons, the price is still expensive, and the performance-price ratio is still lacking. Market Competitiveness

The price is not acceptable to general enterprises, which limits the promotion of AGV in the domestic market, especially it is difficult to be accepted and applied by small and medium-sized enterprises

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