Abstract: An aerial vehicle including a body, a first ranging device, a second ranging device and a controller is provided. The first ranging device is disposed on the body and is configured to detect a first distance between the first ranging device and the reflector. The second ranging device is disposed on the body and is configured to detect a second distance between the second ranging device and the reflector. The controller is configured to obtain an included angle between a direction of the body and the reflector according to the first distance and the second distance.

Abstract: A method and system of measuring a radio wave distribution of a radio signal source and estimating corresponding radio characteristics by using a flying vehicle is provided. The method includes the following steps. At a number of flight positions during a measurement process, a number of first radio signals transmitted by the radio signal source are measured by the flying vehicle. A position of the radio signal source is estimated according to the first radio signals and a radio channel model. A number of first radio characteristics of the first radio signal are obtained, and a radio wave distribution of the radio signal source is estimated according to the first radio characteristics of the first radio signals and a number of second radio characteristics of a number of second radio signals in the radio wave distribution are estimated according to the first radio characteristics of the first radio signals.

Abstract: A method and a system for vehicle head direction compensation are disclosed. The method includes the following. A relative position between each of a plurality of sensors disposed on a vehicle and a plurality of base stations is obtained through the sensors and a relative coordinate system is established by a processor to obtain a vehicle head direction of the vehicle in the relative coordinate system and a deviation angle between an X-axis of the relative coordinate system and a true north azimuth. An angle compensation is performed by the processor on the vehicle head direction of the vehicle in the relative coordinate system based on the deviation angle.

Abstract: An aerial vehicle including a body, a first ranging device, a second ranging device and a controller is provided. The first ranging device is disposed on the body and is configured to detect a first distance between the first ranging device and the reflector. The second ranging device is disposed on the body and is configured to detect a second distance between the second ranging device and the reflector. The controller is configured to obtain an included angle between a direction of the body and the reflector according to the first distance and the second distance.

Abstract: A method and a device for communication failure detection are provided. The method includes the following steps. Obtaining a piece of located path information of an unmanned vehicle. The piece of located path information indicates the unmanned vehicle is located at the located path of a plurality of paths in a route. Selecting one of a plurality of allowable periods as a located path allowable period according to the located path information. Setting a timer and starting the timer according to the located path allowable period. Under a condition that a communication module receives a periodic message before the timer reaches the located path allowable period, resetting the timer. Under a condition that the communication module does not receive the periodic message when the timer reaches the located path allowable period, determining that a communication failure occurs.

Abstract: An unmanned aerial vehicle (UAV), a system and a method for determining a landing status of the UAV are provided. The UAV system includes a UAV, a landing surface and a processing unit. The UAV has a landing gear furnished with a plurality of sensors. The landing surface is provided for the UAV to land thereon. The processing unit, coupled electrically with the plurality of sensors, is to determine, while the UAV is landing towards the landing surface, either whether or not a number of the plurality of sensors that have touched the landing surface at least once within a touch-judging time is not less than a predetermined touch-judging number, or whether or not a number of the plurality of sensors that contact the landing surface synchronously within a land-judging time is not less than a predetermined land-judging number.

Abstract: A method and system of measuring a radio wave distribution of a radio signal source and estimating corresponding radio characteristics by using a flying vehicle is provided. The method includes the following steps. At a number of flight positions during a measurement process, a number of first radio signals transmitted by the radio signal source are measured by the flying vehicle. A position of the radio signal source is estimated according to the first radio signals and a radio channel model. A number of first radio characteristics of the first radio signal are obtained, and a radio wave distribution of the radio signal source is estimated according to the first radio characteristics of the first radio signals and a number of second radio characteristics of a number of second radio signals in the radio wave distribution are estimated according to the first radio characteristics of the first radio signals.

Abstract: A method and a device for communication failure detection are provided. The method includes the following steps. Obtaining a piece of located path information of an unmanned vehicle. The piece of located path information indicates the unmanned vehicle is located at the located path of a plurality of paths in a route. Selecting one of a plurality of allowable periods as a located path allowable period according to the located path information. Setting a timer and starting the timer according to the located path allowable period. Under a condition that a communication module receives a periodic message before the timer reaches the located path allowable period, resetting the timer. Under a condition that the communication module does not receive the periodic message when the timer reaches the located path allowable period, determining that a communication failure occurs.

Abstract: An unmanned aerial vehicle (UAV), a system and a method for determining a landing status of the UAV are provided. The UAV system includes a UAV, a landing surface and a processing unit. The UAV has a landing gear furnished with a plurality of sensors. The landing surface is provided for the UAV to land thereon. The processing unit, coupled electrically with the plurality of sensors, is to determine, while the UAV is landing towards the landing surface, either whether or not a number of the plurality of sensors that have touched the landing surface at least once within a touch-judging time is not less than a predetermined touch-judging number, or whether or not a number of the plurality of sensors that contact the landing surface synchronously within a land-judging time is not less than a predetermined land-judging number.

Abstract: A method and system for display control, a breakaway judging apparatus and a video/audio processing apparatus are provided. The method includes following steps. A display signal source is received and a play content is obtained according to the display signal source. It is judged whether a play time corresponding to the play content is in a breakaway time according to at least one advertising fingerprint, wherein the at least one advertising fingerprint is a characteristic message corresponding to the play content, and the breakaway time is at least one time interval for playing at least one advertisement in the play content. If the play time corresponding to the play content is in the breakaway time, a prompt message is superimposed to the play content.

Abstract: A method and system for display control, a breakaway judging apparatus and a video/audio processing apparatus are provided. The method includes following steps. A display signal source is received and a play content is obtained according to the display signal source. It is judged whether a play time corresponding to the play content is in a breakaway time according to at least one advertising fingerprint, wherein the at least one advertising fingerprint is a characteristic message corresponding to the play content, and the breakaway time is at least one time interval for playing at least one advertisement in the play content. If the play time corresponding to the play content is in the breakaway time, a prompt message is superimposed to the play content.

Abstract: An exemplary embodiment of a system for updating electronic shelf labels (ESLs) comprises multiple ESLs, and a gateway connected to the multiple ESLs to update data of the multiple ESLs. Each ESL comprises a transceiver having a media condition detector to detect whether other ESL(s) perform an update at the time slot, a controller, a memory, and a random number generator randomly selecting one of multiple time slots of a frame when an ESL update procedure begins, wherein the time slot corresponds to an index stored in the memory by the controller. The ESL performs the update at this time slot when none of said other ESL(s) performs the update at the time slot. When said other ESL(s) performs the update at the time slot, the controller enables the random number generator to randomly select another time slot from a next time frame.

Abstract: An exemplary embodiment of a system for updating electronic shelf labels (ESLs) comprises multiple ESLs, and a gateway connected to the multiple ESLs to update data of the multiple ESLs. Each ESL comprises a transceiver having a media condition detector to detect whether other ESL(s) perform an update at the time slot, a controller, a memory, and a random number generator randomly selecting one of multiple time slots of a frame when an ESL update procedure begins, wherein the time slot corresponds to an index stored in the memory by the controller. The ESL performs the update at this time slot when none of said other ESL(s) performs the update at the time slot. When said other ESL(s) performs the update at the time slot, the controller enables the random number generator to randomly select another time slot from a next time frame.