摘要:
The present invention is related to a system which is portable and attache the body of a trainee so that the trainee can practice navigating of a model airplane at an arbitrary location, contrary to the system of a large-sized airplane. According to an object of the present invention there is provided a trainee navigates a model airplane virtually by simulating a model airplane using a computer by combining the three-dimensional virtual image of a model airplane and the actual image of the training site by a computer. The simulation method of a radio-controlled model airplane of the present invention is comprising the steps of recording various airplane models into the computer system; simulating the airplane model by processing signals received from the controller; producing images by rendering the results of signal processing of the simulation step; showing images which are to appear in two eyes of the user at both indicators of HMD(head-mounted display) or STHMD(see-through head-mounted display) in order to convert produced images to be three-dimensional; and producing the unique sound of the corresponding airplane model in three dimensions and listening the sound to the headphone of HMD or STHMD.
摘要:
There is provided a base assembly for a motor, including: a base member including at least one coil hole having a lead wire of a coil passing therethrough and having an inner surface formed to be stepped, the coil generating a rotational driving force of a motor; an insulating member inserted into the coil hole to be fixed thereto in order to prevent contact between the lead wire and the base member; and a printed circuit board disposed on a lower surface of the base member, coupled to one surface of the insulating member, and electrically connected to one end of the lead wire.
摘要:
The present invention provides a brushless vibration motor. A bracket has a burring part protruding upwards. A shaft is fitted at a first end thereof into the burring part. A stator comprises at least one coil which is provided on the upper surface of the bracket. The bearing is rotatably fitted over the circumferential outer surface of the shaft. The rotor has a rotor yoke fitted over the circumferential outer surface of the bearing, a magnet coupled to the rotor yoke, and a weight causing eccentric rotation. The stopper is provided on a second end of the shaft and is spaced apart from the upper end of the bearing to by a predetermined distance. The brushless vibration motor of the present invention has no a separate casing, thus enhancing spatial utilization.
摘要:
Disclosed herein is a flat type vibration motor. The motor includes a bracket having a shaft mounted to the central portion of the bracket, with a lower substrate and a magnet being adhered to the upper surface of the bracket. A casing covers the upper portion of the bracket, and defines an internal space. An upper substrate has on a lower surface thereof a commutator. A coil and a weight are adhered to the upper surface of the upper substrate. A resin member is provided on some portion of the upper substrate and has a bearing holding hole. A bearing is held in the bearing holding hole and rotatably supported by the shaft. A brush is secured at a first end thereof to the lower substrate and contacts at a second end thereof to the commutator to form a contact part.
摘要:
The present invention relates to a multi-function actuator, in which a voice coil vibrates a sound-generating diaphragm in response to an audio signal. A vibration coil is placed on a central axis coaxial with the voice coil for generating vibration in response to the audio signal or a vibration signal. A vibration unit includes a magnet for generating a magnetic field to both of the voice coil and the vibration coil and a yoke having a predetermined mass. The vibration unit is vertically vibrated by an electromagnetic force produced from at least one of the voice coil and the vibration coil. A switch selectively applies the audio signal to the vibration coil. The multi-function actuator can prevent the vibration of the vibration unit during sound generation in response to user's switch selection.
摘要:
A wafer level fan out semiconductor device and a manufacturing method thereof are provided. A first sealing part is formed on lateral surfaces of a semiconductor die. A plurality of redistribution layers are formed on surfaces of the semiconductor die and the first sealing part, and solder balls are attached to the redistribution layers. The solder balls are arrayed on the semiconductor die and the first sealing part. In addition, a second sealing part is formed on the semiconductor die, the first sealing part and lower portions of the solder balls. The solder balls are exposed to the outside through the second sealing part. Since the first sealing part and the second sealing part are formed of materials having thermal expansion coefficients which are the same as or similar to each other, warpage occurring to the wafer level fan out semiconductor device can be suppressed.
摘要:
Disclosed is a semiconductor device. For instance, the semiconductor device includes a main via formed on a dielectric and a ground via formed in a circular arc shape and spaced apart from the main via. The semiconductor device is superior in electric characteristics such as insertion loss or reflection loss and allows efficient use of space.
摘要:
A data management method and apparatus of a portable terminal improves memory utilization efficiency using a data move/copy function which allows moving or copying the user data preserved in the non-volatile memory region of the memory of a portable terminal. A data management method for a portable terminal includes selecting at least one user data item in response to a selection request. An extended region for backup of the user data item is checked in response to a backup request. Transfer data corresponding to the user data item is created. The transfer data is stored in the extended region as a backup of the user data item.
摘要:
The present invention relates to a wireless communication system and, more particularly, to a spectrum sensing method in cognitive radio communication. According to an aspect of the present invention, a method of canceling an introduced transmission signal includes generating a first signal, having an inverse phase, using a data transmission signal transmitted by a data transmission unit, adjusting a path and/or an amplitude of the first signal, and generating a first signal, having an inverse phase, using a data transmission signal transmitted by a data transmission unit, adjusting a path and/or an amplitude of the first signal, and canceling a second signal, introduced through a data receiving unit, and the first signal by the data transmission signal.
摘要:
A wireless communication system provides a method and device for transmitting a preamble. A transmitter generates a first preamble sequence used for frequency offset estimation and generates a second preamble sequence according to the transmission mode. The transmitter transmits the first and second preamble sequences. With respect to the second preamble sequence, the phase thereof may be shifted into different phase offsets according to the transmission mode.