Abstract:
PURPOSE: A source device for controlling a magnetic field using two source resonators at a wireless power transmission system and a controlling method thereof are provided to form a magnetic field in the shape of a selected magnetic field. CONSTITUTION: Two source resonators(252,254) form a magnetic field and delivers electromagnetic energy to a target resonator. A magnetic field shape determining part(230) determines the shape of the magnetic field. A phase varying part(240) varies at least one phase among source resonators. A target confirming part(220) confirms the number and the location of target devices. [Reference numerals] (114) Power conversion part; (210) Control and communication part; (220) Target confirmation device; (230) Magnetic field shape determining part; (240) Phase varying part
Abstract:
PURPOSE: An apparatus and a method for distributing wireless power in a wireless resonant power transmission system are provided to easily distribute wireless power by using a sensor for a target device. CONSTITUTION: A target confirmation unit confirms the state of a target device. A distribution determining unit determines the power of the target device. A matching circuit searching unit confirms the matching circuit information of a source device. A matching circuit changing unit changes the matching circuit of the source device. The matching circuit controls the impedance of a source resonator.
Abstract:
PURPOSE: A communication device using a wireless power and a method thereof are provided to perform communication by using a frequency the same as a wireless power by modulating a message by using an impedance of a target device. CONSTITUTION: A target resonance unit(210) receives a wireless power through a source resonance unit through magnetic coupling of a target resonance period. The target resonance unit transmits a message. A modulating unit(260) modulates a message based on impedance mismatching between a source device and a target device. A control unit(270) controls impedance mismatching by changing the impedance of the target device. [Reference numerals] (210) Target resonance unit; (220) Matching network; (230) Rectifying unit; (240) DC/AC; (250) Load; (260) Modulating unit; (270) Control unit
Abstract:
PURPOSE: A power converter in resonance power transmission system and a resonance power transmission apparatus are provided to reduce interference on other electronic device by suppressing a harmonic frequency. CONSTITUTION: An input terminal receives a DC voltage of a specified level. A first power conversion unit uses a first switching pulse signal and converts the DC voltage into an AC signal. A second power conversion unit uses a second switching pulse signal and converts the DC voltage into an AC signal. A first short circuit removes the odd harmonic of the AC signal and supplies the AC signal to a source resonator(115). A second short circuit removes the odd harmonic of the AC signal and supplies the AC signal to a source resonator(115).
Abstract:
PURPOSE: An apparatus and method for transmitting wireless power are provided to receive resonance without interference by transmitting resonance power with a multiple bands. CONSTITUTION: A wireless power transmission system with a source-target structure includes a source unit(202), a power amplifier(204), and a multiple band resonance unit(206). The source unit generates resonance power by receiving energy. The power amplifier amplifies the resonance power from the source unit and transmits the amplified resonance power to the multiple resonance unit. The multiband resonance unit includes two or more resonators.
Abstract:
PURPOSE: A calibration device, a calibration method, and a grid plate for calibration are provided to reduce calculation time for calibration by detecting a calibration reference point at a time. CONSTITUTION: A calibration device comprises a range data processing unit(301), an image data processing unit(302), and a parameter acquisition unit(303). A coordinate system of a distance sensor obtains a first line segment on a coordinate system of a distance sensor using the calibration reference point of a grid plate. The image data processing unit obtains a second line segment corresponding to the first line segment. The parameter acquisition unit matches the first line segment and the second line segment. The parameter acquisition unit obtains the coordinate conversion parameter between the camera coordinate system and the distance sensor coordinate system.
Abstract:
전송 스트림 에러의 정정방법 및 그에 따른 디지털 방송 수신 장치가 개시된다. 본 발명에 따른 전송 스트림 에러의 정정 방법은 물리적 레이어로부터 전송 스트림을 전송받는 단계, 전송 스트림 내에 있는 포인터에 에러가 있는지 여부를 판단하는 단계, 포인터 에러가 존재하면, 그를 정정하는 단계, 및 프레임 버퍼 값이 올바른지를 판단하고, 올바르지 않으면 프레임 버퍼 값을 정정하여 출력하는 단계를 구비한다. 상술한 바와 같이 본 발명의 일 실시예에 따른 전송 스트림 에러의 정정 방법은 상위 레이어(linked layer)로 전송되기 이전에, 전송 스트림에 존재하는 포인터 에러 또는 잘못된 프레임 버퍼 값을 정정함으로써, 상위 레이어에 정확한 IP 데이터를 전달할 수 있다. 또한, 그로 인하여 도플러 이동으로 인한 성능 저하를 개선시킬 수 있는 장점이 있다.
Abstract:
A method for detecting an object using structured light and a robot using the same are provided to detect a floor object to influence to operation of the robot and to provide a special job to the robot. A robot(100) using method for detecting an object using structured spontaneously travels and performs a given job for a desired purpose. On a traveling path of the robot, there may be an object(10) on the floor. There is a height difference between a region where the object is present and a region where the object is not present within a region(20) where the robot travels. The object such as carpet, rug, and a slipper is an object existing on the traveling region of the robot and to influence the job to be performed by the robot. The robot measures the height difference of the floor during the travel and detects the object using the measured height difference. In order to measure the height difference, the robot projects structured light(30) in the traveling direction and captures the projected area of the structured light.
Abstract:
PURPOSE: A circuit for detecting a VSB(Vestigial SideBand) synchronous signal in a digital TV receiver is provided to search the position of a field synchronous signal and generate various synchronous signals on the basis of the position of the field synchronous signal. CONSTITUTION: A data selecting unit(610) selects one of the first data and the second data in response to a VSB level selection signal, an operation mode selection signal, a data selection signal, a lock selection signal, an external lock signal and an internal lock signal, and outputs the selected data. A PN511(Pseudo random Number 511) sequence detecting unit(620) outputs a correlation value corresponding to a PN511 sequence among correlation values of symbols of the first or second data in response to the first threshold value for detecting a field synchronous signal, and outputs the first control signal. A comparison buffer unit(630) stores the maximum correlation value among the correlation values outputted from the PN511 sequence detecting unit(620), and generates a symbol position, in which the maximum correlation value is generated, as the second control signal. The comparison buffer unit(630) compares a next maximum correlation value with the second threshold value, and generates the third control signal according to the compared result. A synchronous signal position determining unit(640) determines positions of a next field synchronous signal and a segment synchronous signal in response to the second control signal, and generates the fourth control signal. If the field synchronous signal is validly detected in response to the third control signal and the fourth control signal, a synchronous signal valid determining unit(650) generates a valid detection signal at the first level and receives the internal lock signal.