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What are the main ways of AGV navigation?

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What are the main ways of AGV navigation?
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  • Categories:home-industry
  • Author:
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  • Time of issue:2023-11-24 09:26
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(Summary description)Navigation guidance technology is one of the core technologies of AGV, which allows AGV to "know" where it is. There are many common AGV navigation guidance methods, and they have been widely used. AGV navigation includes electromagnetic guidance, magnetic tape guidance, magnetic nail guidance, QR code guidance, ribbon guidance, laser navigation, visual navigation, GPS navigation, hybrid navigation, and so on. We will pay more attentions to following navigation technologies.

What are the main ways of AGV navigation?
Top

(Summary description)Navigation guidance technology is one of the core technologies of AGV, which allows AGV to "know" where it is. There are many common AGV navigation guidance methods, and they have been widely used. AGV navigation includes electromagnetic guidance, magnetic tape guidance, magnetic nail guidance, QR code guidance, ribbon guidance, laser navigation, visual navigation, GPS navigation, hybrid navigation, and so on. We will pay more attentions to following navigation technologies.

  • Categories:home-industry
  • Author:
  • Origin:
  • Time of issue:2023-11-24 09:26
  • Views:
Information

Navigation guidance technology is one of the core technologies of AGV, which allows AGV to "know" where it is. There are many common AGV navigation guidance methods, and they have been widely used. AGV navigation includes electromagnetic guidance, magnetic tape guidance, magnetic nail guidance, QR code guidance, ribbon guidance, laser navigation, visual navigation, GPS navigation, hybrid navigation, and so on. We will pay more attentions to following navigation technologies.

1.Magnetic guidance
The earliest AGVs were implemented based on magnetic guidance technology, requiring the placement of magnetic strips along all possible paths of AGVs or the embedding of magnetic nails on the ground. The AGV is equipped with a magnetic induction sensor on the vehicle, and the AGV can only run along the magnetic strip.
The magnetic induction sensor on the AGV vehicle will continuously sense the magnetic strip on the ground and determine the sensing value in real time. As the sensing value changes dynamically, the AGV adjusts its own angle to ensure that the vehicle continues to move forward along the magnetic strip route without deviation. The first step in positioning is to ensure that the AGV travels on a fixed route, and the specific location where the AGV currently travels on this route is usually determined by the encoder installed by the AGV and wheel coupling link. When AGV travels, the encoder also reflects the distance traveled in real-time with the movement of the wheels. Generally, AGV has a starting point, which provides a fixed route, and a distance value to determine the current position of AGV.

2.Laser guidance
Currently, laser navigation technology is widely used on forklift AGVs. Simply install several laser reflective panels in the area where the laser AGV travels to complete the AGV deployment work. The AGV body is equipped with a rotating laser scanner that continuously scans 360 degrees. The laser light hits the pre installed laser reflectors to determine the precise distance between the laser and these reflectors. Within the range of AGV travel, as long as 3-4 reflective plates can reflect at the same time, complex positioning algorithms can be used to determine the actual position corresponding to the current AGV.

3. QR code positioning

The Kiva robot from Amazon's distribution center has become popular in the warehousing and logistics industry due to its outstanding creativity and advantages. Many domestic companies have developed similar warehousing and handling robots and have put them into practical applications, mainly focusing on order picking scenarios in the e-commerce industry. Kiva robots use inertial navigation and QR code positioning to control the correct operation of each Kiva robot in the warehouse. The Kiva system needs to attach QR code labels on the ground in advance, and all QR code labels form a label matrix network within the working range of the Kiva robot. Each label has unique information and represents the coordinates of the entire matrix network where the entire label is located.

The Kiva robot body is equipped with a high-resolution telephoto camera and continuously shoots in real-time towards the ground. When the Kiva robot passes through the QR code label on the ground, the camera will read the coordinate information contained in the QR code, which will know where the current Kiva robot is located. At the same time, the unique edge positions in the QR code image can be used to adjust the walking angle of the Kiva robot, thereby ensuring the precise direction of the Kiva robot

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