Abstract:
The present invention relates to a wireless power feeding system capable of providing high capacity and miniaturization using high frequency. The present invention comprises: a power supply module (110) generating a magnetic field to which a high-frequency power of 50 kHz or more is applied using a resonant inverter to a trajectory (10); and a power collecting module (120) mounted on a moving vehicle (20) traveling along the trajectory (10) to configure the magnetic field generated from the power supply module (110) and a waste magnetic circuit, and to collect power by magnetic induction. Therefore, the present invention can contrive high capacity and miniaturization of the wireless power feeding system by utilizing the high frequency.
Abstract:
The present invention relates to an apparatus for detecting the loosening of a bolt and a nut using a spring washer and a conductor. The apparatus comprises: a loosening measuring unit which measures a loosening state between a bolt and a nut that are fastened to each other; and a data analyzing unit which determines that the bolt and the nut are loosened when no sensing signal measured by the loosening measuring unit is inputted. The loosening measuring unit comprises: first and second washers which include first and second conductors that come in contact with each other in order to output a sensing signal when the bolt and the nut are fastened; and a spring washer which blocks the output of the sensing signal by separating the first and second washers in order to separate the first and second conductors from each other when the bolt and the nut are loosened. Therefore, the apparatus for detecting the loosening of a bolt and a nut can determine a loosening state between a bolt and a nut by sensing the loosening state using a spring washer and a conductor unlike existing methods such as a visual inspection, and by analyzing the sensing signal, and can accurately detect the position of the loosened bolt and nut. In particular, the apparatus can accurately detect the loosening state between the bolt and the nut at a part which is difficult to be visually inspected.
Abstract:
The present invention relates to an RFID antenna for recognizing an object moving at a high speed, including: an RFDI reader; an RFID tag attached to an object moving at a high speed; and an RFID reader antenna, wherein the RFID reader antenna has a preset length in correspondence to a traveling direction of the object so that the RFID reader or the RFID tag recognizes an RFID tag or an RFID reader passing at the high speed. According to the present invention, since a beam width of the reader antenna is widened so that the tag stays within the beam width range of the reader antenna for a long time, the tag of the object moving in the high speed can be accurately recognized. When the present invention is applied to a position detecting system of a high speed subway, a tag is attached to the railroad and a reader is attached to a railroad car. Therefore, the tag on the track is recognized, when the railroad car passes at a high speed, and position information of the tag is accurately obtained. When the present invention is applied to a hi-pass system in expressway, a tag is attached to a car and a reader is fixed like the conventional method. Then the car passing at the high speed can be recognized.
Abstract:
The present invention relates to a position detecting device for detecting the position of a moving object in a two-phase and two-row linear pulse motor propulsion system. The present invention detects the position of a moving object (110) by comprising: magnetic field units which generate magnetic fields by being arranged in two rows in a length direction on the bottom part of the moving object (110); armature units (121)(122) which are placed on a driving track to create a shifting magnetic field by power supplied from a power conversion device (210), and which are provided in two rows to correspond to the two-row magnetic fields in order to create a driving force through the interaction of two-phase signals. The structure of the present invention comprises: a second magnetic field (111) located on the bottom part of the moving object (110); a search coil unit (131) which detects an electromotive force generated by a magnetic flux of the magnetic fields by being installed side by side in-between the two-row armature units (121)(122); and a control unit (200) which determines the position of the moving object (110) by receiving the signals detected by the search coil unit (131). Hence, an accurate location of the moving object is detected without a separate filtering required for eliminating noise created by the main power generated from the two-row armature units.
Abstract:
The present invention relates to a release detection apparatus for a bolt and a nut using a handcuff-style washer, the apparatus comprising a release detection means for measuring a released state between the bolt and the nut coupled to each other, and a data analysis means for determining the released state between the bolt and the nut using a detection signal measured by the release detection means, wherein the release detection means has a washer shape in a central portion thereof to allow a body of the bolt to passes therethrough and includes a first body and a second body of which one ends are hinged to be able to rotate, a micro switch of interrupting an output of the detection signal when the other ends of the first and second bodies are not connected to each other, and a spring for compressing the other end sof the first and second bodies when the bolt and the nut are released. In accordance with the release detection apparatus according to the present invention, the released state between the bolt and the nut may be detected and determined by using the handcuff-style washer and the micro switch, and also the location where the bolt and nut are released may be accurately detected. Particularly, according to the present invention, the location invisible to the naked eye, in which the bolt and the nut are released, may be accurately detected at a remote area. [Reference numerals] (200) Data analysis means
Abstract:
The present invention relates to a tube railroad system using a magneto hydrodynamic propulsion device applying non-contact power supply technology and an operation method thereof capable of comprising a hollow tunnel and impounding the water (conductive fluid) of a predetermined water level. The present invention comprises a tube structure (100) which forms a plurality of guide tracks (110) inside; a railroad vehicle (200) which is supported on the upper part of the water of the tube structure (100), guides the railroad vehicle by enabling a plurality of guide wheels (210) to correspond to a groove formed in the guide tracks (110), and prevents the shock of the tube structure (100) to the inner side; the magneto hydrodynamic propulsion device (300) which is positioned in a lower end unit of the railroad vehicle (200) as module types, is received in the water of the tube structure (100), and controls the propulsion and the brake of the railroad vehicle (200) according to a magnetic field of the water which performs a function of a conductive fluid by applying DC voltage to a superconductive DC magnet; and a non-contact power supply system (400) which is buried in the lower part of the tube structure (100) and offers power to the magneto hydrodynamic propulsion device (300). The present invention is provided to apply the non-contact power supply technology to the magneto hydrodynamic propulsion device and the tube railroad system, thereby supplying the DC power required in an MHD propulsion system to the railroad vehicle and offering an economical system with cheap system construction costs. [Reference numerals] (a) MHD propulsion system applying non-contact power supply technology and a cross-sectional diagram of a tube railroad vehicle; (AA) Conductive fluid; (b) Structure of the MHD propulsion system applying the non-contact power supply technology
Abstract:
The present invention relates to a two-phase two-column linear pulse motor propulsion system, and more specifically, to a two-phase two-column linear pulse motor propulsion system which can implement a high-speed driving function, a stopping function, and a front/rear switching function through a non-contact operation characteristics by improving acceleration performance and torque characteristics, and which comprises: a field unit (121, 122) prepared in two columns in a longitudinal direction at a lower part of a moving body (110) so as to generate a magnetic field; and an armature unit (131, 312) prepared on a traveling track and generating a moving magnetic field by power supplied from a power conversion device, wherein the armature unit is prepared in two columns so as to correspond to the two-column filed unit (121, 122) and generate propulsion of the moving body (110) through an interaction caused by a two-phase synchronous signal, wherein the propulsion thereof can be improved in comparison with a linear propulsion system having a single phase arrangement and the high-speed driving and acceleration and deceleration performance can be increased thereby.