Abstract:
주변 소음에 따라 주파수 특성이 변화된 신호음을 발생시키는 이동단말기 및 방법이 제공된다. 이동단말기의 소음 측정부는 이동단말기의 주변 소음을 측정하고, 메모리부는 소음 측정부에 의해 측정된 소음 정보를 저장하며, 제어부는 주변 소음의 스펙트럼을 산출하고, 산출된 주변 소음의 스펙트럼에 근거하여 신호음의 주파수 특성을 변화시킨다. 본 발명에 의하면, 주변 소음이 비교적 심한 지역에서도 이동단말기 사용자가 효과적으로 이동단말기의 수신 상태를 파악할 수 있다. 이동단말기, 착신모드, 벨소리, 소음, 주파수
Abstract:
본 발명은 의료 시술 장치의 3차원 위치 측정 및 고정기구에 관한 것이다. 특히, 사용자가 기구를 잡고 손쉽게 위치시키며 위치 고정과 측정을 동시에 실행할 수 있는 의료 시술 장치의 3차원 위치 측정 및 고정 기구에 관한 것이다. 종래의 원격 제어를 위한 마스타(master) 장치와 레이져 측정 기술 등은 위치 측정만을 위한 것으로서 원하는 위치에서의 고정은 별도의 고정 기구을 갖지 않고서는 위치 고정에 많은 어려움이 따랐다. 본 발명에 의하면, 암의 끝 부분에 부착된 장치 및 암의 외부에 위치한 장치의 3차원 위치 측정과 암의 끝 부분에 부착된 장치의 고정을 위한 기구로 사람이 기구를 잡고 원하는 위치로 이동 시킬 수 있으며 위치 고정과 측정을 동시에 실행할 수 있도록 하는 의료 시술 장치를 제공한다. 따라서, 본 발명을 통하여 얻어지는 3차원 위치 측정 및 고정 기구는 외부 기기의 위치 및 방향 측정과 같은 교정(calibration)에 대한 응융과, 암의 끝부분에 부착된 의료 시술 기구와, 시술 대상체와, 상대 위치 측정 및 공간 상의 위치 고정을 요하는 다양한 의료 분야에 적용 가능하다.
Abstract:
The present invention relates to a passive and active magnetic bearing using the Lorentz force, which consists of a rotor with a permanent magnet at its center and several coils which are located at an outside axial air gap of the rotor and fixed to a stator. The air gap is designed to be narrow at the center and gets increasingly wider towards the radial direction so that flux density by the permanent magnet varies according to the radial position. For the passive function, a DC current flows in all coils so that the direction of the generated Lorenz forces is outside in the air gap. It makes it Possible that, when the rotor moves from the predesignated Position, a restoring force is generated which steadily levitates the rotor. While, it can also perform as an active magnetic bearing, if the currents are controlled depending on the location of the rotor.
Abstract:
PURPOSE: A system and a method for controlling a motor miniaturized by using an integrated motor unit are provided to reduce the dimension of a motor control system by integrating boards for controlling a motor control system and connecting to a network. CONSTITUTION: A motor(111) is surrounded by a housing. A cord wheel(112) detects a rotatory state of the motor(111). A motor control board(120) drives the motor(111) according to a control signal and generates rotatory state data with respect to the motor(111). A network board(130) abstracts the control signal with respect to the motor(111) from communication data transmitted from a central controller(200) to transmit it to the motor control board(120) and receives the rotatory state data of the motor(111) from the motor control board(120) to transmit it to the central controller(200). A connector board(140) connects the motor control board(120) and the network board(130) to the central controller(200) through a network.
Abstract:
PURPOSE: A flexible screw driving type height control device is provided to simplify the coupling structure of a flexible module having a plurality of sliding member, and to stably obtain maximum stroke. CONSTITUTION: A flexible screw driving type height control device is composed of a hollow housing(50), a servo motor(60) installed in the housing, a driving gear(64) receiving the driving force from the servo motor, a driven gear(74) engaged with the driving gear and having a spiral groove, a flexible screw(90) coupled to the spiral groove and moving up and down, and a plurality of sliding members(81,82,83,84). One end of a first sliding member is located in the housing. A last sliding member is fixed to the flexible screw.
Abstract:
PURPOSE: A small-sized rotary motor is provided to rotate and control a rotor inside a housing using a buoyancy of a bubble and to provide a simple structure and easiness in manufacturing and assembling. CONSTITUTION: A small-sized rotary motor includes a housing(2) having a bubble outlet(7) formed on an upper portion, a rotor(4) fixed on a shaft(3) rotatably supported on the housing and having a plurality of radial fins(4a), and at least one or more bubble generators(5) provided on one of both sides of the rotor. When current flows to the bubble generator provided on the right and upper portion of the housing, bubble(6) is generated and moved toward the outlet by the buoyancy. The bubble pushes the fins of the rotor, and the rotor is rotated with the shaft. When the bubble rotating the rotor arrives to the outlet, the bubble is discharged to the outside of the housing through the outlet.
Abstract:
The present invention relates to noise reduction technology for controlling exhaust noise in internal combustion engines such as an automobile engine and/or noise in a duct of an air delivery system such as air conditioning systems, and more particularly, to an apparatus and a method for controlling exhaust noise in an internal combustion engine or noise in a duct of an air delivery system using a conduit bypass pipe having variable or fixed lengths and dual mufflers.
Abstract:
PURPOSE: A control device for exhaust noise from an internal combustion engine and noise inside the duct of a gas transfer system and a control method thereof are provided to remove main noise elements and the even and the uneven number times harmonic element of the noise, to enhance engine efficiency and to remove the noise of a large band by decompressing back pressure. CONSTITUTION: A control device for exhaust noise and noise inside a duct contains a main exhaust pipe(11); a first and a second bypass pipe(12,13) changing the connecting length to the main exhaust pipe; actuators(14,15) driving each bypass pipe; a controller(21) for the actuators; a low and a high back pressure muffler(18,19) installed in the lower portion of the main exhaust pipe; and a valve(20) selectively connecting the main exhaust pipe and two mufflers. In a high speed normal traveling, the controller calculates main noise elements and adjusts the length of bypass pipes. Therefore, the bypass pipe(12) removes main noise elements and noise as 3.5 times loud as the main noise element and the bypass pipe(13) removes noise as 2 times loud as the main noise element. Additional residual large band noise is removed by passing through the low back pressure muffler. Thus, the back pressure of exhaust gas is decompressed to enhance engine efficiency and to remove the noise of the large band.