# Collision avoidance of factory pedestrians and vehicles

Richard wrote 04/19/2021 at 15:59 • 5 min read • Like

The Huaxing Intelligent Forklift Collision Avoidance System solution is a human-vehicle collision avoidance solution based on UWBLOC wireless pulse ranging technology. I will slowly finish how this solution is implemented.

First of all, let me talk about its basic underlying logic. Wireless pulses are electromagnetic waves. The speed of pulses flying in the air is equal to the speed of light. The distance can be obtained by multiplying the speed of light by time. This is an arithmetic problem known in middle school. Distance = speed * time.

We calculate the distance based on the time of the wireless pulse flying in the air.

Personnel need to wear a kind of pulse signal transmitting equipment, we call it an anti-collision tag. The anti-collision tag worn by personnel will transmit signal pulses at a pre-set frequency. After the signal pulse is sent out, it will be received by the signal installed on the car. When the equipment receives it, the pulse receiving device installed on the car is called an anti-collision base station, as shown in the figure below. The anti-collision base station will calculate the distance between itself and the anti-collision tag after receiving the pulse sent by the tag.

With the distance between the anti-collision base station and the anti-collision tag, we can realize the function of anti-collision between people and vehicles. We can set an estimated distance and an anti-collision distance in advance. When the positions of people and vehicles are less than what we set in advance Warning distance or collision avoidance distance, then we need to remind people and the driver of the vehicle to pay attention. The collision avoidance base station can be connected with an audible and visual alarm. When the distance between the personnel and the vehicle is less than the alarm distance, the audible and visual alarm can be turned on. , Sound and light can remind drivers and personnel to avoid danger.

This anti-collision system is also suitable for the anti-collision between vehicles, and the principle here is exactly the same as the above-mentioned human-vehicle anti-collision principle.

The tags worn by the personnel have the following forms, which can be fixed on the helmet, or worn on the hand or on the chest. You can choose different wearing styles according to different application scenarios.

The internal structure of the anti-collision base station is supplemented. The real-time distance between people and vehicles or vehicles can be output through 485. There are 2 relays inside, corresponding to 2 normally open and 2 normally closed contacts, which are controlled by the opening and closing of the relay The sound and light alarm is based on this principle.

Below we use several animation screens to make it easier for you to understand this anti-collision system scheme. The following is a schematic diagram of car anti-collision animation.

The following figure shows the schematic diagram of the anti-collision animation of people and vehicles.

If you are concerned about the collision avoidance distance between people and vehicles, let me tell you that the collision avoidance sensing distance of people and vehicles is greater than 100 meters, and the sensing distance of vehicles is greater than 500 meters. Such a distance should satisfy most application scenarios. Finally, let's take a look at an actual installation photo, otherwise you might suspect that I didn't make this kind of project.