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1. 发明专利

JP2000074884A Flaw detector and flaw detecting method for overhead wire 有权
标题翻译： FLAW检测器和FLAW检测方法
公开(公告)号：JP2000074884A
公开(公告)日：2000-03-14
申请号：JP24995898
申请日：1998-09-03
申请人： Chubu Electric Power Co Inc , Mitsubishi Heavy Ind Ltd , 三菱重工業株式会社 , 中部電力株式会社
发明人： ARAKI YASUO , HAMANA MICHIO , KUROKAWA MASAAKI , TAKEISHI MASAYUKI , MORISHITA KEIICHI , NAGAYA SHIGEO , KANEKO MITSUTAKA , DEGUCHI YOSHIHIDE
IPC分类号： G01N27/82
摘要： PROBLEM TO BE SOLVED: To enhance detection precision and detection reliability for a disconnection part, irrespective of levels of currents flowing in an overhead wire.
SOLUTION: This flaw detector includes plural magnetic sensors 102 containing at least a pair of magnetic sensor pairs for detecting a generated magnetic field in an overhead wire 4, plural variable amplifying means 111 for amplifying detected signals A detected by the respective sensors 102, an addition means 115 for calculating a total value C of detected values B via the variable amplifying means 111, and a transmission circuit 116 for transmitting the detected values B and the total value C to a ground equipment 120 by radio-communication. The respective variable amplifying means 111 change amplifying degrees in response to the total value C, the ground equipment 120 includes an operation circuit 122 for dividing a mutual deviation ΔB of the detected values B of the magnetic sensor pairs by the total value C, a processing circuit 123 for converting an operation result in the operation circuit 122 into a display data D, and a display means 124 for displaying the display data D.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：提高断路部分的检测精度和检测可靠性，而与架空线中流过的电流水平无关。解决方案：该探伤器包括多个磁传感器102，其包含至少一对用于检测架空线4中产生的磁场的磁传感器对，用于放大由各个传感器102检测到的检测信号A的多个可变放大装置111，用于通过可变放大装置111计算检测值B的总值C的装置115和用于通过无线电通信将检测值B和总值C发送到地面设备120的发送电路116。相应的可变放大装置111响应于总值C改变放大度，地面设备120包括用于将磁传感器对的检测值B的相互偏差ΔB除以总值C的操作电路122，处理用于将操作电路122中的操作结果转换成显示数据D的电路123以及用于显示显示数据D的显示装置124。

2. 发明专利

JPS5689782A CRT PATTERN DISPLAY SYSTEM 失效
公开(公告)号：JPS5689782A
公开(公告)日：1981-07-21
申请号：JP16777379
申请日：1979-12-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： ENDOU TAKASHI , NISHIHARA MASATOSHI , KAMIMURA TAKEO , ARAKI YASUO
IPC分类号： G01N27/90 , G09G1/00 , G09G1/12

3. 发明专利

JPS51133159A DETECTING DEVICE FOR JOINTS 失效
公开(公告)号：JPS51133159A
公开(公告)日：1976-11-18
申请号：JP5778075
申请日：1975-05-15
申请人： MITSUBISHI HEAVY IND LTD
发明人： ENDOU KIYUU , ENAMI KOUJI , ARAKI YASUO
IPC分类号： B23K9/127 , B23K9/12

4. 发明专利

JPS51131684A SEAM INSPECTION METHOD 失效
公开(公告)号：JPS51131684A
公开(公告)日：1976-11-16
申请号：JP5543675
申请日：1975-05-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： ENAMI KOUJI , ARAKI YASUO
IPC分类号： G01N27/82
摘要： PURPOSE:To carry out the seam inspection to make each gap between a coil and conductors constant, arranging the equipment to coordinate each gap between each conductor which forms the seam section facing a coil placed about the seam section.

5. 发明专利

JPH09171003A EDDY-CURRENT FLOW DETECTOR AND FLOW DETECTION METHOD FOR PIPE 失效
公开(公告)号：JPH09171003A
公开(公告)日：1997-06-30
申请号：JP33200495
申请日：1995-12-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIMURA TAKEO , HANAO IKUJI , KUROKAWA MASAAKI , ARAKI YASUO , ENAMI KOJI , TANIOKA SHUJI , TAKATORI RYOICHI , KIDERA KOJI
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To efficiently detect all cracks of a pipe, such as the pipe of a steam generator, etc., without omission regardless of the lengths and directions of the cracks at the time of performing eddy-current flow detection on the pipe. SOLUTION: A cylindrical eddy-current generating coil group 22 is constituted of 12 (=2N, where, N=6) pieces of saddle-shaped coils 21 and a detecting coil array 24 is constituted of 24 (=6×4) pieces of detecting coils 23. The detecting coil array 24 is arranged on the outer periphery of the central part of the eddy- current generating coil group 22 in the axial direction.

6. 发明专利

JPH05312790A 失效
公开(公告)号：JPH05312790A
公开(公告)日：1993-11-22
申请号：JP11327692
申请日：1992-05-06
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIRAI TASUKU , ARAKI YASUO
IPC分类号： G01N29/04 , G01N29/22 , G01N29/44 , G01N29/10
摘要： PURPOSE:To obtain an apparatus which executes a signal processing so that exfoliation of a coating film can be detected and thereby eliminates an error of visual determination. CONSTITUTION:In a detecting apparatus, a reflected wave received by an ultrasonic sensor 81 is amplified by an amplifier 11 and inputted to a clip circuit 12 for removing a voltage on the negative side. At the fall of a positive output pulse of the clip circuit 12, a one-shot multivibrator 13 is made to operate to generate a gate pulse of a prescribed width and thereby a gate circuit 14 is controlled so as to output only a signal of a negative voltage from a part of exfoliation. A display device 42 which displays this signal is provided. Accordingly, a signal waveform is displayed only when the exfoliation exists, and therefore a mistake in determination is prevented.

7. 发明专利

JPS6450953A SIGNAL PROCESSING APPARATUS FOR DETECTING FLAW USING EDDY CURRENT 失效
公开(公告)号：JPS6450953A
公开(公告)日：1989-02-27
申请号：JP20798287
申请日：1987-08-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIMURA TAKEO , NAKAMURA TETSUO , ARAKI YASUO , SAKURAI TOMOFUMI , IWAHASHI YOICHI , KOYAMA KIMIKO , NAGANO KAZUO , KUMANO SHINTARO
IPC分类号： G01N27/90
摘要： PURPOSE:To evaluate the damage of the heat transfer pipe of a heat exchanger without errors, by comparing signals from an eddy current flaw detector, and obtaining an AND value of the result of comparison. CONSTITUTION:A flaw detecting piece 2 is connected to an eddy current flaw detector 1, which generates four kinds of flaw detecting signals. The flaw detecting piece 2 is inserted into a heat transfer pipe 4 of a heat exchanger, which is a body to be checked, and moved in the pipe. The signals from the flaw detector 1 are combined and supplied to a signal operating unit 5. The effects of a pipe plate 3a and a supporting plate 3b of the heat transfer pipe 4 are removed in three signal operators 51-53. Then, the output signals from the unit 5 are inputted into a comparing and judging unit 6, which is provided with seven comparators 61a-61c, 62a, 62b, 63a and 63b. The signals are compared with each preset value and judged. The signals, which are outputted from the comparators of the unit 6, are inputted into an discriminating gate unit 7, in which AND gates and NAND gates are combined. Logic operations are performed, and the flaws and the attached materials of the heat transfer pipe 4, which is overlapped with the pipe plates 3a and the supporting plate 3b, are identified. Therefore, the accurate, quick judgment can be performed. Since the AND value of the result of the evaluation of a plurality of the signals is obtained, evaluation without errors can be performed.

8. 发明专利

JPS5822951A EDDY CURRENT FLAW DETECTOR 失效
公开(公告)号：JPS5822951A
公开(公告)日：1983-02-10
申请号：JP12266481
申请日：1981-08-05
申请人： MITSUBISHI HEAVY IND LTD , SEIRYO ENG
发明人： ENDOU TAKASHI , KAMIMURA TAKEO , ARAKI YASUO , MISASA MASAHIRO , MARUTA ATSUSHI
IPC分类号： G01N27/82 , G01N27/90
摘要： PURPOSE:To obtain an eddy current flaw detector having high performance, by placing 4 moving pieces energized to the outside by a spring, on a fixed shaft whose section is square, and providing a pair of detecting coils whose section is fan-shaped. CONSTITUTION:4 moving pieces 416 are placed to a fixed shaft 420 whose section is a square, both its ends are inserted into guide cylinders 430, 431, and they are energized in the outside direction by V type plate springs 426, 427. In the center of the moving piece 416, detecting coils 411, 412 are wound round a magnetic core 413 whose section is fan-shaped, it is sealed by a copper plate 414, and is connected to a flaw detector by a lead wire 415. According to such a constitution, each detecting coil closely contacts with a pipe to be detected, by a spring action, and as for an eddy current working on the pipe to be detected, the eddy current is generated within a short range as shown by a part Z' in the figure. Therefore, influence of a factor except a defect is reduced, and the defect can be detected with high performance.

9. 发明专利

JPS56119848A MULTIFREQUENCY EDDY CURRENT DEFECTOSCOPE 失效
公开(公告)号：JPS56119848A
公开(公告)日：1981-09-19
申请号：JP2292680
申请日：1980-02-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： ENDOU TAKASHI , NISHIHARA MASATOSHI , KAMIMURA TAKEO , ARAKI YASUO
IPC分类号： G01R13/28 , G01N27/90
摘要： PURPOSE:To display one or more desired patterns selectively by time-dividing multiple parallel output signals of respective flaw detection frequencies and by reducing the time-divided time width of undesired signals. CONSTITUTION:While multifrequency eddy current defectoscope 8 operates and probe 1 moves in the direction shown by arrow 6 to detect structure 3 of outside of thin pipe 2 and defect 4 of thin pipe 2, the output of defectoscope 8 is inputted to signal display device 13. Respective flaw detection frequency parallel signals, after time-divided by switch circuits 37-47, are inputted to Y-axial and X-axial deflecting input terminals of signal recorder 9 via impedance converting circuits 49 and 50. Then, the flaw detection frequency signal selecting circuit, interlocking with selection switches, selectively reduces the time-divided time widths of undersired flaw detection frequency signals to less than the time width where the brightness of a brightness-modulated pulse signal is zero. Consequently, desired signal pattern can be selectively displayed and the necessary number of signal recorders can be decreased.

10. 发明专利

JPS56119847A MULTIFREQUENCY EDDY CURRENT DEFECTOSCOPE 失效
公开(公告)号：JPS56119847A
公开(公告)日：1981-09-19
申请号：JP2292580
申请日：1980-02-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： ENDOU TAKASHI , NISHIHARA MASATOSHI , KAMIMURA TAKEO , ARAKI YASUO
IPC分类号： G01R13/28 , G01N27/90
摘要： PURPOSE:To make it possible to simultaneously observe signal patterns differing in flaw detection frequency by adding different DC voltages to respective multifrequency output signals that a probe outputs and then by displaying the sums in time-division mode. CONSTITUTION:While multifrequency eddy current defectoscope 8 operates and probe 1 moves in the direction shown by arrow 6 to detect structure 3 of outside of thin pipe 2 and defect 4 of thin pipe 2, the output of defectoscope 8 is inputted to signal display device 13. Then, Y- and X-axial signals 21-28 of respective flaw detection frequencies are inputted to adding circuits 37-44 via impedance converting circuits 29-36 and then added to DC voltages, differing in polarity and absolute value, from DC voltage generating circuits 45 and 46. The outputs of adding circuits 37-44, after time-divided by switch circuits 52-59, are transferred to Y- and X- axial deflecting input terminals of signal recorder 9. Consequently, signal patterns of respective flaw detection frequencies can be displayed simultaneously in parallel and the necessary number of the signal recorders can be decreased.

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