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1. 发明专利

JP2001185890A MAGNETIC SHIELD ROOM AND ITS CONSTRUCTION METHOD 失效
公开(公告)号：JP2001185890A
公开(公告)日：2001-07-06
申请号：JP36568399
申请日：1999-12-22
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA NOBORU , SHIBUYA SHINICHI
IPC分类号： H05K9/00
摘要： PROBLEM TO BE SOLVED: To provide a magnetic shield room for reducing the magnetic field noise of a commercial power supply frequency entering the magnetic shield room, and its construction method. SOLUTION: In a magnetic shield room 1 where a ferromagnetic material is applied to such a structure as a floor 2, front and rear walls 3 and 4, left and right walls 6 and 7, and the ceiling 5 while the internal space is magnetically blocked, pairs of close circuited coils 11, 11'-13, 13' that oppose each other sandwiching the inner space in the direction of the three axes of the structure are arranged, and a magnetic noise in a commercial power supply frequency is reduced, thus reducing magnetic shield due to the application of the ferromagnetic material in the magnetic shield room. The method can also be applied to an existing magnetic shield room.

2. 发明专利

JP2001052925A DEMAGNETIZING COIL OF DEMAGNETIZING DEVICE FOR BUILDING STRUCTURE 失效
公开(公告)号：JP2001052925A
公开(公告)日：2001-02-23
申请号：JP22476199
申请日：1999-08-09
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA NOBORU , ISHIKAWA TOSHIYUKI , KAJIWARA AKIRA , OKADA SETSU
IPC分类号： E04B1/92 , H01F13/00
摘要： PROBLEM TO BE SOLVED: To obtain a demagnetizing coil of a demagnetizer for a building structure that permits an efficient and prompt demagnetizing operation while reducing the cost of the device as a whole, by forming a magnetic field in parallel with the surface of the building structure to remove a residual magnetic field on the building structure. SOLUTION: In a demagnetizing coil 1 of a demagnetizing device for a building structure, a conductor 5 is wound in a flat or swirling form or is connected in parallel with a flat surface such that a magnetic field is formed in parallel with a surface of the building structure, which generates a fault magnetic field. Damped oscillation current passes through the conductor 5. The demagnetizing coil allows a direction of an appearing oscillating magnetic field 11 to conform to an orientational direction of magnetized reinforcing bars 13. Thus, a magnetic flux for demagnetization is more likely to pass therein.

3. 发明专利

JP2001044028A DEMAGNETIZING METHOD FOR BUILDING STRUCTURE AND DEMAGNETIZING DEVICE USED THEREFOR 失效
公开(公告)号：JP2001044028A
公开(公告)日：2001-02-16
申请号：JP21823899
申请日：1999-08-02
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA TOSHIYUKI , ISHIKAWA NOBORU , KAJIWARA AKIRA , OKADA SETSU
IPC分类号： E04B1/92 , H01F13/00
摘要： PROBLEM TO BE SOLVED: To provide a demagnetizing method and a demagnetizing device used for it, where the moveming of the device is made easy for removing a residual magnetism occurring at a building structure, while action is done in a short time using a normal power source. SOLUTION: A DC power source 2 with a capacitor is connected in series with a current circuit 3, to a demagnetizing coil 1 arranged on a surface 6 of a building structure where a residual magnetism is generated, which provides delay effect of the damped oscillation current of a resonance circuit specified by the capacity of a capacitor for a DC power source, the resistance of a demagnetizing coil, and inductance to limit a damping factor. The damped oscillation current generates an oscillation magnetic field 5, which acts on residual magnetism 8 of the building structure for demagnetization at the demagnetizing coil, and the demagnetizing coil is arranged according to the position of residual magnetism, for demagnetization in a short time with a normal power source, regardless of the polarity of residual magnetism.

4. 发明专利

JP2000208326A TRUCK FOR DEMAGNETIZING ARCHITECTURE 失效
公开(公告)号：JP2000208326A
公开(公告)日：2000-07-28
申请号：JP870299
申请日：1999-01-18
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA TOSHIYUKI , SHIBUYA SHINICHI , ISHIKAWA NOBORU
IPC分类号： E04B1/92 , E04G21/16 , H01F13/00
摘要： PROBLEM TO BE SOLVED: To efficiently demagnetize a magnetized part of a slab, with a simple device. SOLUTION: With a truck 6 provided on a slab 5 for allowed movement and four demagnetizing coils 1-4 placed on the truck 6 provided, the demagnetizing coils 1-4 comprise rectangular parallelopipeds and the size in top view is matched with bararrangement pitches L1 and W1 in the slab, while the demagnetizing coils 1-4 are connected in series so that the generated the magnetic fields have the same orientation.

5. 发明专利

JPH11101782A MEASUREMENT OF MAGNETISM OF STEEL MATERIAL 失效
公开(公告)号：JPH11101782A
公开(公告)日：1999-04-13
申请号：JP26379097
申请日：1997-09-29
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA NOBORU , YAMAKAWA YUJI
IPC分类号： G01R33/12 , G01N27/72
摘要： PROBLEM TO BE SOLVED: To accurately measure magnetism by reducing magnetic noise by covering the periphery of a measuring place with a magnetic shield container and scanning the surface of a steel material by a magnetism sensor within a container. SOLUTION: A scanning drive apparatus 3 is arranged to the outside of a magnetic shield container 2 and only a magnetism sensor 5 is arranged in the container 2 not only to reduce the size of the container 2 but also to reduce the magnetic noise from the drive apparatus 3. The magnetic shield container 2 is pref. constituted so that the length of the cylindrical part thereof is made twice or more the diameter of the opening part thereof. As a material used in the container 2, a permalloy or silicon steel plate, amorphous pure iron or the like high in magnetic permeability is proper but even a material other than this allowing a line of magnetic force easy to flow may be used. When the container 2 is arranged around the magnetism sensor 5, the line of magnetic force of magnetic noise flows through the container 2 and the steel material 1 and the magnetic noise in the space surrounded by the container 2 and the steel material 1 is reduced. At this time, by extending the length of the container 2, since the penetration of magnetic noise from the opene surface on the side opposite to the steel material 1 is reduced, synthetic magnetic noise is reduced and the spontaneous magnetic field from the steel material 1 is easily measured.

6. 发明专利

JPH1137976A NON-DESTRUCTIVE QUANTITATIVE EVALUATION METHOD FOR PLASTICITY OF STEEL PRODUCT 失效
公开(公告)号：JPH1137976A
公开(公告)日：1999-02-12
申请号：JP19464997
申请日：1997-07-18
申请人： SHIMIZU CONSTRUCTION CO LTD , SEIKO INSTR INC
发明人： YAMAKAWA YUJI , ISHIKAWA NOBORU , KAYANE KAZUO , NAKAYAMA SATORU , ODAWARA NARIKAZU
IPC分类号： G01N27/72 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To quantitatively evaluate the degree of residual distortion as plasticity by measuring a magnetic field of the surface of a steel product to determine a distribution range in terms of a difference between the maximum and the minimum values of a magnetic signal within a zone of a specified size. SOLUTION: A specified tensile load is applied to a test object 10 is applied to measure the degree of residual distortion with a π type displacement meter or the like. The surface magnetic field of the test object 10 after loaded is measured, for example, by a superconducting quantum interference device fluxmeter having a concentric type secondary differentiation detection coil and zoned by 5×5 cm to define a difference between the maximum value and minimum value within the zone. A distribution range as a difference between the maximum and minimum values of a space differential value of each zone positioned on a specified line in the longitudinal direction of a narrow part 10b of the test object 10 correlates with the degree of residual distortion in a plastically deformed area. Therefore, for example, the surface of a steel material of the existing structure is scanned by the fluxmeter to extract a space differential value of each zone on a line along the direction of drawing the steel product. Thus, by learning the distribution range of the space differential values, the residual distortion can be obtained quantitatively.

7. 发明专利

JPH1025141A AGGREGATE AND DAMPING CONCRETE 失效
公开(公告)号：JPH1025141A
公开(公告)日：1998-01-27
申请号：JP17683296
申请日：1996-07-05
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA NOBORU
IPC分类号： E01B3/28 , C04B20/00 , E04B1/98
摘要： PROBLEM TO BE SOLVED: To inexpensively realize the damping performance in no need of a sophisticated structure by using hollow vessels containing particle bodies which are enclosed in the vessels so that the particles may be freely movable in the vessels as an aggregate to be admixed to a hardening material such as concrete. SOLUTION: The specific gravity of this aggregate is set to an almost same value as that of the hardening material and the aggregate is admixed to the hardening material to form a variety of structures. Even when these structures are exposed to vibrations due to earth-quakes, winds, traffics and the like, the particles in the vessels move to damp the vibration. An example of damping concrete according to this invention is given in the figure. The damping aggregate 2 is, for example, a flat sphere and is constituted with a hollow vessel 3 as an outer shell and a plurality of particle bodies 4 (for example, a metal with particle sizes of 1-0.1mm) enclosed in the vessel 3. The vessel 3 is made of metal, ceramic, hardened cement body, plastic resin and particularly a material having a high strength than that of the concrete main body is used in order to secure the high strength than that of the concrete main body.

8. 发明专利

JPH09145677A METHOD FOR JUDGING PLASTICIZATION OF STEEL 失效
公开(公告)号：JPH09145677A
公开(公告)日：1997-06-06
申请号：JP30027695
申请日：1995-11-17
申请人： SHIMIZU CONSTRUCTION CO LTD , SEIKO INSTR INC
发明人： ISHIKAWA NOBORU , YAMAKAWA YUJI , KAYANE KAZUO , NAKAYAMA SATORU , ODAWARA NARIKAZU
IPC分类号： G01R33/12 , G01N27/72 , G01N27/82 , G01N27/83
摘要： PROBLEM TO BE SOLVED: To judge plasticization and its position according to the distribution condition of magnetic field by scanning the surface of steel with a differential type magnetic sensor. SOLUTION: When a magnetic sensor 10 is placed close to the surface of a steel 1, it detects vertical elements of a magnetic field, and it is moved in parallel to the steel 1 so as to scan the surface thereof and obtain the one- dimensional distribution of intensity of the magnetic field. Further, the entire surface of the steel 1 is scanned square with the sensor 10 so as to obtain the plane distribution of intensity of the magnetic field. Then, scanning points is prepared on the respective scanning lines according to sampling frequency, and the intensities of magnetic field at the respective scanning points are converted into digital values through an A/D converter, then the points out of respective scanning points that are the same in magnetic field intensity are connected with each other to prepare a similar magnetic line diagram. When any magnetic anisotropy is generated internally due to plasticizing deformation, any distribution of magnetic field caused by magnetic anisotropy occurs externally, and its phenomenon is reflected on the prepared diagram. Thus, the result is analyzed so as to judge the plasticization of the steel 1.

9. 发明专利

JPH07147497A SUPERCONDUCTIVE MAGNETIC SHIELD STRUCTURE 失效
公开(公告)号：JPH07147497A
公开(公告)日：1995-06-06
申请号：JP34029793
申请日：1993-11-25
申请人： SHIMIZU CONSTRUCTION CO LTD , DOWA MINING CO
发明人： SHIBUYA SHINICHI , ISHIKAWA NOBORU , MUKOYAMA SUMIO , KOJIMA MASAHIRO , HASEYAMA HIDEETSU
IPC分类号： G01R33/035 , H01L39/00 , H05K9/00
摘要： PURPOSE:To enable a superconductive magnetic shielding structure to shield an object contained in it from a magnetic field which penetrates through an opening and to be set compact in structure as a whole by a method wherein the shielding structure is composed of two cylinders, the one axial ends of the cylinders are closed with superconductive material respectively, and the cylinders are set to rotate or slide relatively. CONSTITUTION:Superconductive cylindrical bodies 1 and 2 provided with openings 4 and 5 on their peripheral surfaces respectively and different from each other in diameter are provided. The cylindrical bodies 1 and 2 are made to slide relatively and axially in the directions indicated by the arrows so as to constitute a cylindrical superconductive magnetic shield structure 3 arranged coaxially in a telescopic manner. The shield structure 3 is composed of the cylindrical bodies 1 and 2 whose one ends are closed with superconductive material, wherein the cylindrical bodies 1 and 2 are set to slide or rotate relatively in or about the axial direction. By this setup, a highly magnetically shielded empty space can be formed inside a magnetic shield structure.

10. 发明专利

JPH0697690A MAGNETIC SHIELD DEVICE 失效
公开(公告)号：JPH0697690A
公开(公告)日：1994-04-08
申请号：JP13930692
申请日：1992-05-29
申请人： SHIMIZU CONSTRUCTION CO LTD
发明人： ISHIKAWA NOBORU , OSADA KOJI , YUDA TAKASHI
IPC分类号： H05K9/00
摘要： PURPOSE:To acquire a magnetic shield device of a simple structure which makes the shield of an external magnetic field in a wide frequency range possible, reduces the thickness of a shield material, reduces the material cost and the working cost and reduces the working period. CONSTITUTION:The device is provided with a sensor 2 for measuring magnetic field inside a shield room formed by using a non-magnetic conductive material, and means 3a, 3b for generating magnetic field which cancels external magnetic field based on measurement data of the sensor 2.

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