Tag or camera-based proximity warning systems - making the best selection

Proximity warning systems are designed to prevent collisions and accidents in workplaces where pedestrians and machines/vehicles share the same space. Two common types of proximity warning systems are tag-based and camera-based systems.
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Tag-based proximity warning systems use radio frequency identification (RFID) tags, which are attached to the clothing or personal protective equipment of workers. These tags emit a signal that is detected by sensors installed on machines and equipment.

When a worker wearing a tag enters the detection zone of a sensor, the machine operator is alerted, and the worker's tag also gives off an audible and haptic alert. This feature is fundamental in changing the behaviour of pedestrian workers in relation to moving vehicles, as they are made aware of the presence of the vehicle and can take necessary action to avoid a collision.
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On the other hand, camera-based proximity warning systems use cameras mounted on a machine to detect the presence of workers in the vicinity. The cameras are linked to a computer system that analyses the images and alerts the operator when a worker is detected. These systems can also be equipped with additional features such as object detection and tracking, which can improve their effectiveness.
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"One of the main advantages of tag-based proximity warning systems is that they do not require line of sight

One of the main advantages of tag-based proximity warning systems is that they do not require line of sight to detect the presence of workers. This means that they can be used in environments where obstacles or equipment may block the view of cameras. However, they do require workers to wear tags, which may be a challenge in environments where personal protective equipment is not required.

On the other hand, camera-based proximity warning systems do not require workers to wear any additional equipment, which can be a benefit in environments where compliance with safety protocols is a challenge. However, they can be less effective in low light and certain weather conditions, or when workers are obscured by equipment or other objects.

Ultimately, the choice between a tag-based or camera-based proximity warning system depends on the specific needs and challenges of the workplace. Both systems have their advantages, and selecting the appropriate system requires a thorough assessment of the workplace environment and safety requirements.

You can find out more about the SensorZone proximity warning system here.