US Patent 9069356 Nomadic security device with patrol alerts

There is provided a device such as a robot that includes a processor and a number of sensors. Each of the sensors provides respective sensor data to the processor. The sensor data from each sensor is indicative of corresponding characteristics of an environment of the device. A memory includes a security mode component that is executable by the processor and is configured to cause the device to autonomously navigate at least a portion of the environment. A detection component executable by the processor is configured to detect an unusual condition in the environment.