A self-moving device, including: a moving module, a task execution module, a control module. The control module is electrically connected to the moving module and the task execution module, controls the moving module to actuate the self-moving device to move, controls the task execution module to execute a working task. The self-moving device further includes a satellite navigation apparatus, electrically connected to the control module and configured to receive a satellite signal and output current location information of the self-moving device. The control module determines whether quality of location information output by the satellite navigation apparatus at a current location satisfies a preset condition, controls, if the quality does not satisfy the preset condition, the moving module to actuate the self-moving device to change a moving manner, to enable quality of location information output by the satellite navigation apparatus at a location after the movement to satisfy the preset condition.

Current indoor tracking methods are inadequate to accurately and reliably point a pointer or camera at an object or a person doing an activity. An apparatus and method are provided for cooperative tracking that is operable both indoors and outdoors. The system works using ranging technology without the need for placing radiation sources and/or sensors in set locations around the location where tracking takes place. The apparatus and method may be used for automatic filming, allowing free movement of both the subject of the filming and that of the camera with a compact design, and providing easy setup at any location.

Current indoor tracking methods are inadequate to accurately and reliably point a pointer or camera at an object or a person doing an activity. An apparatus and method are provided for cooperative tracking that is operable both indoors and outdoors. The system works using ranging technology without the need for placing radiation sources and/or sensors in set locations around the location where tracking takes place. The apparatus and method may be used for automatic filming, allowing free movement of both the subject of the filming and that of the camera with a compact design, and providing easy setup at any location.

A system can be used with a drone delivery service that facilitates a service delivery via at least one drone delivery device. The system includes a code generator configured to generate beacon data that identifies a subscriber. A beacon generator is configured to generate a wireless homing beacon that indicates the beacon data, wherein the wireless homing beacon is detectable by the at least one drone delivery device to facilitate the service delivery to the subscriber by the drone delivery device at a location selected by the subscriber and a network interface is configured to communicate via a network. The system receives delivery image data captured after the service delivery by the drone delivery device.

A system can be used with a drone delivery service that facilitates a service delivery via at least one drone delivery device. The system includes a code generator configured to generate beacon data that identifies a subscriber. A beacon generator is configured to generate a wireless homing beacon that indicates the beacon data, wherein the wireless homing beacon is detectable by the at least one drone delivery device to facilitate the service delivery to the subscriber by the drone delivery device at a location selected by the subscriber and a network interface is configured to communicate via a network. The system receives delivery image data captured after the service delivery by the drone delivery device.

An Instrumented Spherical Blast Impulse Recording Device (ISBIRD) provides for survivable test measurement of an explosive blast impulse. The ISBIRD includes a spherical housing formed of a metal having a thickness sufficient to survive the explosive blast wave from a test weapon. A test data module of the ISBIRD includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave. An internal support structure of the ISBIRD is attached inside of the spherical housing and attached to the test data module. The internal support structure centrally locates the test data module within the spherical housing during exposure to the explosive blast wave.

An Instrumented Spherical Blast Impulse Recording Device (ISBIRD) provides for survivable test measurement of an explosive blast impulse. The ISBIRD includes a spherical housing formed of a metal having a thickness sufficient to survive the explosive blast wave from a test weapon. A test data module of the ISBIRD includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave. An internal support structure of the ISBIRD is attached inside of the spherical housing and attached to the test data module. The internal support structure centrally locates the test data module within the spherical housing during exposure to the explosive blast wave.

The present invention introduces an alarm circuit that detects potentially dangerous objects in the proximity during human activities, such as walking or running. The circuit is designed mostly to prevent stumbling for the people with temporary or permanent visual impairment conditions but can be used to prevent physical accidents under other circumstances as well. The circuit of the present invention can be permanently or temporarily mounted on human shoes, clothes, or other wearing means, including body parts. The placement of the circuit of the present invention includes but is not limited to the previously mentioned ones.

The present invention introduces an alarm circuit that detects potentially dangerous objects in the proximity during human activities, such as walking or running. The circuit is designed mostly to prevent stumbling for the people with temporary or permanent visual impairment conditions but can be used to prevent physical accidents under other circumstances as well. The circuit of the present invention can be permanently or temporarily mounted on human shoes, clothes, or other wearing means, including body parts. The placement of the circuit of the present invention includes but is not limited to the previously mentioned ones.

An apparatus for passive coherent location includes a forecaster, an evaluator, a receiver, and a correlator. The forecaster generates a prediction of a radio-frequency signal transmitted from an antenna of a broadcasting service. The evaluator generates an effectiveness metric from the prediction of the radio-frequency signal. The receiver receives the radio-frequency signal that an object reflects from the antenna to the receiver. The correlator determines, from the radio-frequency signal reflected from the object as received at the receiver, an ambiguity function having a maximum at a temporal offset and a Doppler shift. The temporal offset and the Doppler shift at the maximum partially determine at least a position of the object. The apparatus optionally includes a selector for tuning the receiver to the radio-frequency signal in response to the effectiveness metric.