Safety design is one of the most important aspects in the development and design of intelligent AGV trolleys. The functions of safety devices include preventing equipment from malfunctioning during operation and preventing the impact of personnel misoperation and its operating environment facilities. The function of the safety device not only protects the AGV itself. In addition to the smooth completion of the safety and maintenance AGV functions, the safety of personnel and operating environment facilities is also protected to the greatest extent possible. In terms of AGV, it can be divided into automatic trucks, automatic trailers and automatic forklifts. In addition, depending on the way of guiding, it can be divided into electromagnetic guidance, laser guidance, inertial guidance and other AGVs. Forms, due to differences in functional uses and structures, the settings of their safety devices vary. Therefore, in combination with various structures, AGV automatic guided vehicles should consider the following safety protection measures. The following are mainly for the safety characteristics of industrial magnetic navigation AGV trolleys. AGV car | custom AGV
The AGV trolley usage environment includes a static environment and a dynamic environment. Static environment: refers to the constant environment around the AGV trolley running route, including workshop pillars, equipment, noise and electromagnetic interference. It affects the choice of the AGV trolley travel path and the stability of the AGV trolley. Dynamic environment: refers to the changing environment in the operating environment of the AGV car over time, such as: logistics vehicles, trucks, AGVs in motion, pedestrians, etc. AGV car path conditions: divided into simple path and complex path; simple path: here refers to a straight line, loop rotation and other single line, less cross-AGV travel path. It is suitable for the round-trip transportation of materials between the exit and the entrance of the reservoir area; the material transportation of the automobile assembly shop, the engine and the rear axle assembly loop. Common guiding methods are electromagnetic guidance and tape guidance. Complex path: This refers to the intersection of multiple curves, regional dispersion, irregular channels, random allocation of multiple vehicles, and strict requirements for traffic management. It is suitable for material transportation between multiple entrances and exits in the warehouse area and various units in the production workshop, such as the transportation of auxiliary materials in the cigarette workshop, storage, and transportation of raw materials for LCD panel plants.
At the beginning of the program, we used the warnings, signs, signals, colors, safety bars and other warnings to actively protect the AGV safe walking path. In order to prevent collision with people and surrounding facilities, it is considered to provide corresponding anti-collision devices as needed. When the AGV is linked with facilities such as platforms, automatic doors, elevators, etc., the host computer systematically considers the linkage factors of all aspects to make the AGV movements synergistically prevent each other. The special environment verifies and clarifies its environmental conditions and sets special AGV operating rules as needed. When the driving lane is shared with the general passage, pedestrians can avoid the safe space of the vehicle between the pedestrian and the AGV driving passage. At intersections, forks, sharp turns, etc., pedestrians may actively collide with the AGV because they do not see the vehicle. Therefore, the intelligent AGV car has a large number of passive safety designs for the mechanical structure and the obstacle avoidance system. Friendly acoustic and opto-electronic and anti-collision devices are installed. For the different guidance systems of the AGV, the electromagnetic wave, light, ultrasonic wave generated by the power equipment, electric wiring, lighting equipment, air machine, etc. used in the driving area, and the static electricity generated by the friction between the wheel and the road surface are also set accordingly. Security measures.
The intelligent AGV car adopts the self-developed "Optical Array Obstacle Avoidance Sensor" and "Sonic Range Obstacle Avoidance Sensor". Compared with the traditional infrared photoelectric sensor and laser ranging sensor, it completely solves the detection blind spots; color and light. Deadly interference; small signal delay; quantized distance can be adjusted according to the application environment, differential safety distance debugging or partial shutdown...
The intelligent AGV car host computer system can randomly determine the priority of the task to be executed nearby; and the AGV must comply with the traffic control principles in normal operation. The AGV management system software must include intelligent diagnostics of these principles and the ability to handle abnormal faults based on received information. The intelligent AGV car system software itself must have self-diagnosis, self-protection function, and automatic system recovery function after abnormal fault clearing. The computer management system implements effective, integrated control command scheduling, which is necessary for AGV in normal operation. As the dispatching center, the intelligent AGV car system must ensure the safe operation of the AGV in the actual production process, and must also ensure the safety of the system itself.
Therefore, users must consider security issues before installing the AGV system. The goal is two. One is to prevent collision between vehicles or between vehicles and personnel. The second is that when the collision avoidance system fails, the main safety equipment should immediately stop the vehicle and wait for manual intervention to resume. Active safety devices can be divided into fixed devices and mobile devices, which usually form so-called system-level components. Includes blocking system, and device layout. Mobile devices, including vehicles, must follow a range of rules, such as load capacity, camber, speed, and so on. Before using the AGV system, the user must be trained in the use of the safety system. There are many types of traffic control and collision avoidance systems. The simplest is to install anti-collision buffers in front of the vehicle and keep the speed below a certain value. Once it hits, the vehicle stops until the resistance disappears. The other is area blocking, where different areas are separated on the rails, and the vehicle can enter the area only if there is no car in the next area. Intelligent AGV trolleys typically use programmable controllers to implement the relevant logic controls. More advanced is the computer area blocking, similar to the regional blocking principle, but more complicated. The computer monitors the position of all vehicles and monitors the gap between the vehicles. The layout of the workshop should consider the width of the vehicle passage, the distance from the pedestrian passage, the distance to the equipment in the workshop, etc.