Collision detection sensor and robot equipped with the same

Collision Detection Sensor

This technology is a collision detection system that utilizes multiple capacitive sensors with varying measurement areas placed on a robot's surface to simultaneously perform wide-range proximity detection and precise position/gesture recognition.

Existing collaborative robots use high-output actuators, which pose a risk of collision accidents when working in close proximity to human operators. Consequently, there is a need for reliable and precise non-contact proximity sensing solutions to prevent such incidents.

This technology features a hybrid array of capacitive sensor groups with different measurement areas (first and second measurement areas) on the robot's link surface, with additional third-area sensors placed at the joints. By leveraging the differences in sensing range and resolution proportional to these areas, the system detects collisions and recognizes user gestures to trigger control actions. Applicable to robotic gripping, precision measurement, and automated equipment, it enhances the safety and reliability of collaborative robots by enabling rapid collision detection and gesture recognition for improved human-robot interaction.

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Key Features:

• A collision detection sensor for a robot, comprising a plurality of first capacitive measurement units arranged at regular intervals, and a plurality of second capacitive measurement units, with two or more of the second units disposed between the first units.
• A plurality of second capacitive measurement units disposed on the robot's surface, spaced apart from the first capacitive measurement units, and having a second measurement area different from the first measurement area of the first capacitive measurement units.
• A plurality of second capacitive measurement units having a second measurement area different from the first measurement area of the first capacitive measurement units.
• A plurality of first capacitive measurement units disposed on the surface of the robot.

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This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of functional safety implementation technology based on international standards for robots operating in human-contact environments, as well as risk assessment and mitigation technology.