Robotic Security Guard from Knightscope
The best part of this story is the slight resemblance to R2D2. Hopefully this robot will see the difference between a kid stealing a $2 candy bar versus a knife. You might be surprised but some people might not know the difference.
Story at Gizmag.com:
The robots, which share a passing resemblance to R2-D2, collect real-time data via a network of sensors. These sensors can include a 360-degree high definition video camera, high quality microphones, thermal imaging sensor, infrared sensor, radar, lidar, ultrasonic speed and distance sensors, air quality sensor, and optical character recognition technology for scanning things like license plates.
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The following video gives a brief overview of the Knightscope K5.