Approaching

Indicating safety distance | Atomic

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Preamble

Type

Atomic Pattern; Indicating Safety Distance

Ranking

** (initially validated through empirical user studies)

Version

Author

Selina Layer (selina.layer@iao.fraunhofer.de), Kathrin Pollmann (kathrin.pollmann@iao.fraunhofer.de), Christine Busch, Carla Bernadette Bubeck

Design Challenge

Interaction Situation

Human and robot are moving in the same area. As they approach each other and their trajectories cross, the distance between them can be closer than the safety distance of the robot. A collision is possible.

Communication
Goal

“I am too close to you.”

Design Solution

Solution

This pattern is a variation of the “Safety Zone” pattern. As soon as the person touches the projected line, change the light color to red to indicate that the person has come too close to the robot. In addition, a short warning tone (horn) can be triggered.

Rationale

Red is a color that is commonly used to symbolize danger or a problem and communicate some kind of warning, for example in traffic signs or various HMIs. Honking is generally used to draw attention an urgent matter. An approach combining visual and acoustic cues increases the probability of being noticed by other road users.

References and
Context

Light

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Sound

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