A forklift pedestrian collision avoidance method based on ultra-wideband technology

Abstract

The invention discloses a forklift pedestrian collision avoidance method based on ultra-wideband technology, which includes: when a UWB base station detects that there are pedestrian tags within a distance threshold, judging the number of pedestrian tags; if it is greater than 1, or equal to 1 but not identified as When the driver tags, control the sound and light alarm to start the alarm and / or control the forklift controller to start the forklift speed limit; the UWB base station detects whether the rocker switch connected to it is pressed, if the rocker switch is pressed and the pressing time is longer If it is equal to the first preset duration, cancel the alarm and / or cancel the forklift speed limit; if the number of pedestrian tags is equal to 1 and the rocker switch is pressed for a duration greater than or equal to the second preset duration, the pedestrian tag will be identified Label the driver. The present invention realizes the one-time exemption from speed limit for pedestrian tags and the long-term exemption of speed limit for driver tags through the rocker switch, which not only fully guarantees the safety of pedestrians and forklift drivers, but also facilitates the use and management of pedestrian tags.

Description

technical field [0001] The invention relates to the field of forklift safety warning, in particular to a forklift pedestrian collision avoidance method based on ultra-wideband technology. Background technique [0002] In factory warehouse work scenarios, there are often situations where forklifts and pedestrians exist in the same area, and there are many intersections in the warehouse, and the forklift has relatively poor vision. It is very easy for forklifts to collide with other equipment or pedestrians, and the cost is extremely high. [0003] At present, there have been researches on forklift pedestrian collision avoidance using UWB method, but the following problems generally exist: [0004] 1. Pedestrian tags do not distinguish between drivers and pedestrians. When changing from a pedestrian role to a driver role, the driver has to turn off the power of the tag to avoid the continuous alarm of the forklift and the tag. If the driver forgets to turn on the power of the ...

AI Technical Summary

Problems solved by technology

[0004] 1. Pedestrian tags do not distinguish between drivers and pedestrians. When changing from a pedestrian role to a driver role, the driver has to turn off the power of the tag to avoid the continuous alarm of the forklift and the tag. If the driver forgets to turn on the power of the tag after getting off the car, the driver will lose has a protective effect;

[0005] 2. Sometimes pedestrians need to communicate or chat with the driver. At this time, the pedestrian has to turn off the power of the tag to avoid the continuous alarm of the forklift and the tag. When the pedestrian finishes talking and leaves, if he forgets to turn on the power of the tag, the protection will be lost;

[0006] 3. The alarm threshold is fixed, regardless of whether the forklift is stationary or moving, it is the same alarm threshold, and the dynamic experience performance is poor;

[0007] 4. The sound of the alarm cannot be adjusted, no matter it is a quiet or noisy environment, customers can only use one alarm sound;

[0008] 5. To realize forklift pedestrian collision avoidance is mainly through the sound and light alarm, which is only a safety reminder. The linkage control with the forklift is not realized, and the automatic speed limit cannot be realized. Forklift control still depends on the driver's operation

Images