Abstract: The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.

Abstract: A wind power generation system having a group of wind turbine generators includes a superior controller having a generation power recording memory to record a sum of a generation power of the group of wind turbine generators and a charge and discharge power of a power storage system, a charge and discharge power command computing device for computing a charge and discharge power command for the power storage system in a second period by making use of information of the output power in a first period computed in the output power computing unit and information of a detection value at the present of the generation power recording memory, and a charge and discharge power control device.

Abstract: A tag detecting system for detecting a movement of a person or an object that mounts an RFID tag, a moving object detecting method, and an entrance/exit management system using the moving object detecting system are provided. The tag detecting system detects a specific person or object by restricting a detection area of the RFID tag to a narrow area. Since the moving object detecting method detects a piggyback, the entrance/exit system prevents the piggyback even if there are a number of persons passing through an entrance/exit gate almost at the same time.

Abstract: A electric rotating machine includes a rotor winding constituting a part of a rotor, a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, a leader drawn from the conductor to an outside diameter side, and a connecting line constructed by stacking a plurality of conductor plates to electrically connect the rotor winding and the leader. The connecting line consists of a radial direction linear portion which is straight in the radial direction on the leader side, and a bending portion which branches into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and has a linear portion formed at a part of the bending portion. The linear portion of the bending portion is joined to a bottom surface of the rotor winding.

Abstract: An image pickup unit is disposed so as to be able to obtain a scan projection image of an inspection subject from each of a vertical direction and a horizontal direction. An X-ray absorption coefficient of an object in the inspection subject is obtained from the vertical scan projection image and the horizontal scan projection image. It is determined whether there is a threat in the inspection subject on the basis of the X-ray absorption coefficient. Furthermore, a CT image is obtained by moving the image pickup unit around the inspection subject. It is determined whether there is a threat in the inspection subject, on the basis of the CT values of the CT image.

Abstract: In a maintenance management system and a method of providing engineering support, maintenance information concerning generating plants owned by a user is provided to a maker, and the maker analyzes such items of information, and manages the information in a structure maintenance management system. The user accesses the maintenance management system through the Internet, extracts information to be obtained from databases, and implements maintenance activities or drafts a plan. Engineers of the maker register maintenance information through an intranet, and provide engineering support for the maintenance activities promoted by the user.

Abstract: An electromagnet a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: The remote monitoring diagnostic system and method includes a data storage file used to collect the plant data representing the operation status of a plant and to store the plant data, a monitoring system to monitor the field plant according to the collected plant data, a database storing the past plant data associated with errors having occurred to the plant and actions taken to cope with the errors, a diagnostic system to analyze the plant data sent according to the database, and a reporting system to send a report to the user of the plant regarding the causes for the error and/or actions taken to cope with the error based on the result of the analysis. An error is judged in a combustor, when a difference in temperature of two exhaust gas temperature datum detected from adjacent combustors is larger than a predetermined value.

Abstract: The present invention comprises a data storage file used to collect the plant data representing the operation status of a plant and to store the plant data, a monitoring system to monitor the field plant according to the collected plant data, a database storing the past plant data associated with errors having occurred to the plant and actions taken to cope with the errors, a diagnostic system to analyze the plant data sent according to the database, and a reporting system to send a report to the user of the plant regarding the causes for the error and/or actions taken to cope with the error based on the result of the analysis.

Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.

Abstract: An electromagnet composed of a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil, characterized by a permanent magnet arranged in a gap surrounded by the movable iron core and the stationary core, wherein the movable iron core is attracted by the stationary iron core by a magnetic field created by the permanent magnet, thereby it is possible to solve a problem inherent to a conventional electromagnet such that a permanent magnet is directly energized in a reverse direction during release operation so as to cause demagnetization of the permanent magnet.

Abstract: In a maintenance management system and a method of providing engineering support, maintenance information concerning generating plants owned by a user is provided to a maker, and the maker analyzes such items of information, and manages the information in a structure maintenance management system. The user accesses the maintenance management system through the Internet, extracts information to be obtained from databases, and implements maintenance activities or drafts a plan. Engineers of the maker register maintenance information through an intranet, and provide engineering support for the maintenance activities promoted by the user.

Abstract: In a lightning protection system for a wind power generation installation, a conductor ring 16 is provided on a wind mill vane 1 and at a rotor casing 6 incorporating a wind power generator 3 a zinc oxide element 18 is provided so as to face the conductor ring 16 with a spark gap 17, thereby, if a lightning in winter season which causes to flow a large current for a long duration time hits the wind mill vane 1, the wind power generation installation is effectively protected.

Abstract: A power converter system includes: a circuit breaker having one terminal connected to a power system and another terminal connected to a load; a transformer for interconnection; a power converter; and a controller for controlling the power converter, wherein, during a return to grid connected operation, the power converter is controlled such that the phase of an output voltage of the power converter matches the phase of the system voltage, and the circuit breaker is closed, so as to prevent an overcurrent during a changeover from the self commutated operation to the grid connected operation of the power converter.

Abstract: SF.sub.6 gas is collected from the inside of a gas insulated machine during maintenance and inspection and is refined. Compositions of the refined SF.sub.6 gas are analyzed and confirmed to be reusable at the site. In the process of SF.sub.6 gas collecting and refining, acidic gases are neutralized and removed by a dry method using filters and the refined SF.sub.6 gas is collected in a collecting tank. In particular, after the refining, the composition of the collected SF.sub.6 gas is measured and confirmed by analysis equipment to quantitatively confirm whether or not the refined SF.sub.6 gas is reusable.

Abstract: A drier has a cooler block for drying internal cooling gas circulated in an electric machine, and the temperature of the cooler block is controlled by a thermoelectric device having Peltier effect and keep a constant temperature being near freezing point and not below the freezing point of dew drop contained in the gas.

Abstract: In a radiation shield in which a bag having flexibility is filled with a shielding liquid, a side of the bag is integrally equipped with reinforcement members which have a higher strength than the material of the bag and are longitudinally disposed and spaced horizontally. The bag filled with the shielding liquid is restrained from being deformed (swollen in its lower portion) by the reinforcement members having a higher strength than the material of the bag, so that the radiation shield is maintained in a predetermined thickness and exhibits predetermined performance.

Abstract: A radiation shielding body unit comprises a bag, a reinforcing wall connecting between inner wall surfaces of the bag opposite to each other, a liquid supply/discharge port for radiation shielding liquid, provided in the bag, and a hole portion provided in the bag for engagement with a connection device used when the bag is supported by suspension. And a radiation shielding body comprises a frame and a plurality of the above-mentioned radiation shielding body units, each of the radiation shielding body units is suspendedly supported by the frame through a connecting device engaged with the hole portion of each of the radiation shielding body units.

Abstract: The present invention relates to a method for treating radioactive laundry waste water generated from a nuclear power plant, nuclear fuel reprocessing plant, or radioactive nuclides handling facilities, and provides a method for treating the waste water safely and for reducing the volume of generated radioactive waste to a minimum.Radioactive laundry waste water containing a detergent of which major contents are a nonionic surface active agent and inorganic builders is concentrated by an evaporating concentrator, the concentrated waste water is dried and pulverized to dry powder by a rotary centrifugal thin film dryer, and the dry powder is incinerated. By using the above detergent, foaming at the concentration can be reduced, and the concentrated waste water can be easily dried and pulverized. Further, the dried powder can be incinerated stably and safely without influencing undesirable effect on the body of the incinerator.