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What kinds of AGV cars are there?

2018-12-25 15:05:50 點擊數:

AGV(Automated Guided Vehicles), also known as unmanned carrier, automatic navigation vehicle, laser navigation vehicle. Its remarkable feature is unmanned driving, AGV equipped with automatic guidance system, which can ensure that the system can automatically travel along the predetermined route without manual pilotage, and automatically transport goods or materials from the starting point to the destination. Another characteristic of AGV is good flexibility, high automation and high intelligence. AGV's traveling path can be flexibly changed according to the requirements of storage location and production process, and the cost of changing the traveling path is very low compared with the traditional conveyor belt and rigid transmission line. AGV is generally equipped with loading and unloading mechanism, which can automatically interface with other logistics equipment to realize the automation of the whole process of loading and unloading and handling of goods and materials. In addition, AGV has the characteristics of cleaner production. AGV relies on its own batteries to provide power. It has no noise and pollution during operation. It can be used in many places requiring clean working environment.

AGV has a history of 50 years since its invention. With the expansion of its application field, its types and forms have become diverse. AGV is often divided into the following types according to the navigation mode in the course of AGV auto-driving:

Types of AGV cars:

1. Electromagnetic Induction Guided AGV

Electromagnetic induction guidance is generally installed on the ground along a pre-set traveling path. When high frequency current flows through the traverse, electromagnetic fields are generated around the traverse. Two electromagnetic inductors are symmetrically installed on the AGV. The intensity difference of the electromagnetic signals they receive can reflect the degree of AGV deviating from the trajectory. The automatic control system of AGV controls the steering of vehicle according to this deviation. Continuous dynamic closed-loop control can ensure the stable automatic tracking of AGV to the set path. This electromagnetic induction guided navigation method is currently used in most commercial AGVS, especially for large and medium-sized AGVs.


2. Laser-guided AGV

The AGV is equipped with a rotating laser scanner and a laser positioning mark with a high reflectivity reflector on the wall or pillar along the running path. The AGV transmits the laser beam by a laser scanner, and then receives the laser beam reflected back by the positioning mark around it. The vehicle computer calculates the current position and the direction of motion of the vehicle and enters the vehicle through and the built-in digital map. Line comparison is used to correct the azimuth so as to realize automatic handling.

At present, the application of AGV is more and more popular. According to the same guiding principle, if the laser scanner is replaced by an infrared transmitter or an ultrasonic transmitter, the laser-guided AGV can be changed into an infrared-guided AGV and an ultrasonic-guided AGV.


3. Vision-guided AGV

Vision-guided AGV is a rapidly developing and mature AGV, which is equipped with CCD cameras and sensors, and has an image database of the surrounding environment of the AGV's desired driving path in the vehicle computer. During the AGV driving process, the camera dynamically acquires the image information of the surrounding environment of the vehicle and compares it with the image database, so as to determine the current position and make a decision on the next driving step.

This kind of AGV has the best guidance flexibility in theory because it does not require any physical path to be set artificially. With the rapid development of computer image acquisition, storage and processing technology, the practicability of this kind of AGV is becoming stronger and stronger.

In addition, there are inertia-guided AGV and optical-guided AGV of ferromagnetic gyroscope.

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