Patent application number | Description | Published |
20090009162 | EDDY CURRENT FLAW DETECTION PROBE - Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target. | 01-08-2009 |
20090102473 | EDDY CURRENT TESTING METHOD AND EDDY CURRENT TESTING APPARATUS - The present invention provides an eddy current testing method and an eddy current testing apparatus that can reduce detection noise to increase the SN ratio thus improving the defect detection accuracy. | 04-23-2009 |
20110148404 | METHOD AND APPARATUS FOR EVALUATING LENGTH OF DEFECT IN EDDY CURRENT TESTING - The surface length of a metal subject to be inspected is evaluated by detecting an eddy current without using a combination of a scale and visual or liquid penetrant inspection. An exciting coil and a detecting coil are scanned above the subject in a length direction. An eddy current detector measures an output voltage corresponding to scanning positions based on an output from the detecting coil. Based on an output voltage distribution curve indicating a distribution of output voltages corresponding to the scanning positions, position information is extracted corresponding to values which are within a differential voltage range and lower by 12 dB than a maximum value of the output voltages on the left and right sides of the distribution. A distance between the positions included in the extracted information is calculated to evaluate the length of a slit which is a defect present on the subject surface. | 06-23-2011 |
20110218741 | Device for Detecting Defect of Turbine Rotor Blade and Method for Detecting Defect of Turbine Rotor Blade - A defect detection device for a turbine rotor blade, wherein a turbine rotor blade implanting portion is constructed by fitting a set of rotor grooves formed on a rotor disc portion with a set of blade grooves formed on each root portion of turbine rotor blades arranged around the outer circumference of a turbine rotor rotatably installed in a turbine casing; a recess is provided in the side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to the turbine rotor blades; an eddy current probe for inspecting the state of the turbine rotor blade implanting portion is movably installed in the recess; a rod provided with a signal line for transmitting a signal detected by the eddy current probe, connected to the eddy current prove, is set up to be movable through a hole in a turbine casing and an air gap formed in the stationary blade diaphragm; the eddy current probe connected to the rod is moved toward or away from the turbine rotor blade implanting portion; and a data analyzer is provided for determining the condition of a defect occurred in the turbine rotor blade implanting portion based on the signals detected by the eddy current probe. | 09-08-2011 |
20120216382 | METHOD OF INSTALLING JET PUMP BEAM - A method of installing a jet pump beam includes, disposing an inlet mixer having one end portion inserted to a diffuser provided in a reactor pressure vessel and an other end portion communicated with a riser pipe disposed in the reactor pressure vessel between a pair of projecting portions of a transition piece provided to the riser pipe, separately inserting both end portions of a jet pump beam disposed above the inlet mixer into a groove formed in each of the pair of projecting portions, arching the jet pump beam by moving a center portion of the jet pump beam upward, pushing a screw member engaged with the arched jet pump beam against the inlet mixer, and measuring deflection amount of the arched jet pump beam when the screw member is being pushed against the inlet mixer. | 08-30-2012 |
20130193960 | Eddy Current Flaw Detection System and Eddy Current Flaw Detection Method - An eddy current flaw detection system includes an eddy current flaw detection probe having a substrate facing an inspection surface, and at least one exciting coil and at least two detecting coils provided on the substrate, a scanning device which scans the probe on the inspection surface, a scan control device which drives and controls the scanning device, an eddy current flaw detection device which acquires results of detection of a plurality of detection points corresponding to combinations of the exciting and detecting coils for each scan position of the probe, and a data processing/display device which processes data from the scan control device and the eddy current flaw detection device and thereby displays a result of flaw detection. The data processing/display device acquires three-dimensional coordinates of the detection points for each scan position of the probe and thereby creates three-dimensional flaw detection data. | 08-01-2013 |
20130241541 | Eddy Current Inspection Device, Eddy Current Inspection Probe, and Eddy Current Inspection Method - Provided is an eddy current inspection device, an eddy current inspection probe and an eddy current inspection method that make it possible to detect defects existing in deeper parts of test objects. Three or more odd number of excitation coils are arranged at even intervals in a circumferential direction on a postulated circumference. Excitation currents applied to the excitation coils are controlled so that the phase difference between excitation currents applied to adjacent ones of the excitation coils arranged in the circumferential direction on the postulated circumference equals one cycle divided by the number of excitation coils. A magnetic field generated according to an eddy current occurring in the test object due to a magnetic field caused by the application of the excitation currents to the excitation coils is detected by use of a detector arranged on a postulated plane containing the postulated circumference but inside the postulated circumference. | 09-19-2013 |
Patent application number | Description | Published |
20090233126 | Composite Structure - According to the present invention, a structure made of yttrium oxide is formed on a surface of a substrate comprises yttrium oxide polycrystals as a main component, a boundary layer made of hyaline does not substantially exist on a boundary face between crystals which form the structure, and both a cubic system and a monoclinic system exist in the crystal system of the yttrium oxide polycrystals. With this, it is possible to adjust the hardness of the structure made of yttrium oxide formed on a surface of a substrate to be larger than that of an yttrium oxide sintered body. | 09-17-2009 |
20130183594 | SOLID OXIDE FUEL BATTERY CELL - Disclosed is a solid oxide fuel battery cell having a high initial power generation performance and a good power generation durability while ensuring adhesion between an air electrode and a current collector. The solid oxide fuel battery cell includes a solid electrolyte, a fuel electrode, an air electrode, and a current collector provided on the surface of the air electrode, wherein the air electrode is formed of lanthanum ferrite perovskite oxides, lanthanum cobalt perovskite oxides, or samarium cobalt perovskite oxides, and the current collector is porous including silver, palladium, and an oxide and has an average porosity of 20% to 70% in a portion other than a portion near a boundary between the current collector and the air electrode and, in the near-boundary portion, an average porosity of not less than 50% of the average porosity of the portion other than the near-boundary portion. | 07-18-2013 |