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51. 发明专利

CA2048496C FLAW DETECTOR FOR METAL MATERIAL 未知
公开(公告)号：CA2048496C
公开(公告)日：1996-07-30
申请号：CA2048496
申请日：1991-08-06
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU , KAWABE TOSHIHIDE
IPC分类号： G01N27/90 , G01N27/82
摘要： The present invention relates to a flaw detector for metal material which can maintain and manage pipelines by means of the remote field eddy current method and a remote field eddy current sensor apt for the above detector. In the flaw detector for metal material, AC signal having a constant level and shifted in a predetermined phase angle are added with received signal received in receiving coils of the remote field eddy current sensor. Thus stable phase detection in a normal part of the pipeline to be tested can be obtained and precise diagnosis to the pipeline to be tested can be performed by preventing generation of abnormal flaw data. Further, when using an AGC circuit in order to maintain the received signal level provided by the received coils, S/N ratio of the flaw data can be improved by stabilization of the received signal level. Further, is providing a receiving coils which receive the remote field eddy current and another receiving coil which have fewer number of turns than that of said received coils and are spaced further from the exciting coil than the predetermined distance, a stable data as to both of the gradually flaw progressing part and the local flaw progressing part can be obtained by the remote field eddy current sensor.

52. 发明专利

GB2255184B Flaw detector for metal material 未知
公开(公告)号：GB2255184B
公开(公告)日：1995-08-16
申请号：GB9116817
申请日：1991-08-05
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： KAWABE TOSHIHIDE , HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU
IPC分类号： G01N27/90
摘要： The present invention relates to a flaw detector for metal material for maintaining and managing pipelines using a remote field eddy current sensor. An AC signal having a constant level and shifted by predetermined phase angle is added to signals received in receiving coils of the remote field eddy current sensor to obtain accurate phase detection in a normal, nonflawed portion of the pipeline to be tested (e.g. uniform thickness, no holes, etc.). By preventing generation of abnormal flaw data, precise diagnosis of the pipeline can be performed. An AGC circuit may be used to maintain at a constant level of received signal. Two sets of spaced apart receiving coils are spaced from an exciting coil a distance greater than a predetermined distance (about two time the pipeline diameter). The set of receiving coils closest to the exciting coil has a greater number of coil turns than the other set. This coil configuration generates sensed coil differential signals having sufficient signal amplitude to permit stabilized and accurate phase detection and comparison for nonflawed and gradually flawed regions in the pipe.

53. 发明专利

JP2001004562A PIPING CORROSION INSPECTING DEVICE 失效
公开(公告)号：JP2001004562A
公开(公告)日：2001-01-12
申请号：JP17555999
申请日：1999-06-22
申请人： CHUGOKU X RAY CO LTD , TOKYO GAS CO LTD
发明人： FUJIWARA SHIGERU , SUYAMA KIICHI
IPC分类号： G01N23/18 , F17D5/00 , G01N23/04
摘要： PROBLEM TO BE SOLVED: To suppress the effects of variations in X rays, to make X-ray generating time efficient, and to rationalize piping corrosion inspection by improving the degree of discrimination between corrosion which occurs with degradation in pipes forming piping and defects, etc., present in the outer sheaths with which the pipes are coated. SOLUTION: In a traveling mechanism, a portable X-ray generating device 2 and a one-dimensional array sensor 3 opposed to each other with a pipe 1 at the center are simultaneously reciprocated along the axis of the pipe 1, and the portable X-ray generating device 2 is reciprocated in directions which intersect the direction of the axis of the pipe 1 at right angles by a predetermined amount in which it is possible to sample data on the intensity of transmitted X rays transmitted though the pipe 1 at all times within the sensor arrangement of the one-dimensional array sensor 3. Then the data-sampling of the one-dimensional array sensor 3 is each started synchronously when the frequency of a reference pulse of X rays transmitted from a portable X-ray generation control device 20 takes a predetermined frequency value to be determined by the pipe voltage in use of the portable X-ray generating device 2.

54. 发明专利

JPH0862145A IN-PILE INSPECTION APPARATUS 失效
公开(公告)号：JPH0862145A
公开(公告)日：1996-03-08
申请号：JP19520594
申请日：1994-08-19
申请人： CHUGOKU X RAY CO LTD
发明人： KIMOTO SANSHIRO
IPC分类号： G01N21/88 , G01N21/954 , H04N7/18
摘要： PURPOSE: To determine the shape of the inner wall face of a pipe easily by observing an arcuate reflected laser light as clear as that from a normal part on the inner wall face of the pipe simultaneously with an arcuate reflected laser light deformed along a thin part. CONSTITUTION: The in-pipe inspection apparatus comprises a borescope 3 having an ocular prism 8 arranged at a predetermined angle, and a laser emitting part 4 comprising a laser generator 5 and an incident prism 9 for retracting the laser light from the laser generator 5 to reflect on the inner wall face of a pipe at a predetermined angle and directing the reflected laser light toward the ocular prism 8 of the borescope 3. A transparent film 11 covering the ocular prism 8, the incident prism 9, etc., is provided at the opening 10a of a housing 10 for the laser emitting part 4.

55. 发明专利

JPH07209198A PIPE INTERIOR INSPECTION APPARATUS 失效
公开(公告)号：JPH07209198A
公开(公告)日：1995-08-11
申请号：JP656394
申请日：1994-01-25
申请人： CHUGOKU X RAY CO LTD
发明人： KIMOTO SANSHIRO
IPC分类号： G01B11/30 , G01N21/88 , G01N21/94 , G01N21/954 , H02G1/08
摘要： PURPOSE:To economically and easily perform the inspection work for the interior of a pipe with high inspection accuracy. CONSTITUTION:A laser beam projection part 4 consisting of the laser generator 5 and a prism 9 refracting the laser beam emitted from the laser generator 5 to reflect the same to the inner wall surface of a pipe at a predetermined angle and allowing reflected laser beam to be made incident on the prism 8 of a bore scope 3 is screwed and fitted to the leading end of the bore scope 3 having the prism 8 arranged thereto at a predetermined angle. Therefore, the reflected laser beam from the inner wall surface of the pipe is clearly drawn on an ITV 6 through the television camera 2 fixed to the bore scope 3.

56. 发明专利

JPH06324000A METHOD AND DEVICE FOR INSPECTING INSIDE OF PIPE LINE 失效
公开(公告)号：JPH06324000A
公开(公告)日：1994-11-25
申请号：JP11067793
申请日：1993-05-12
申请人： OSAKA GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： SUEZAWA SHINYA , JO HIROYUKI , FUJIWARA SHIGERU , SHIRAISHI TOKIYOSHI , TOMOBE SHIGENOBU
IPC分类号： G01B11/30 , G01N21/88 , G01N21/954 , H02G1/08
摘要： PURPOSE:To easily perform inspection working of the inside of a pipe line which is inexpensive and wherein inspection precision is high. CONSTITUTION:Two pieces of slit light 33, 34 transmitted from a laser projector 3 are irradiated on a weld metal 19 and a poor penetration part 20 formed on a pipe line inwall face 18a. The slit light 34 is made incident on the weld metal 19, the other slit light 33 is cast on the poor penetration part 20, so that, since the height of a reflection face is changed, the slit light 34 becomes a piece of slit reflection light 36, the slit light 33 is shifted and divided into two pieces of other slit reflection light 35a, 35b. Thereby, since a defect of the pipe line inwall face 18a can be inspected with human vision, inspection working which is inexpensive and wherein inspection precision is high can be performed easily.

57. 发明专利

JPH06206538A SELF-PROPELLING DEVICE IN PIPE LINE 失效
公开(公告)号：JPH06206538A
公开(公告)日：1994-07-26
申请号：JP329893
申请日：1993-01-12
申请人： CHUGOKU X RAY CO LTD
发明人： SANEMORI TAKESHI , FUJIWARA SHIGERU , KANEHARA RYOJI , SHIRAISHI TOKINORI , OKADA TOKUJI
IPC分类号： B61B13/10
摘要： PURPOSE:To surely run a device without steering operation in an opening part with apprehension of dislocating drive wheels. CONSTITUTION:Drive wheels 2A, 2B, 2C, having a sideslipping mechanism corresponding to a change of internal diameter of a different diametric pipe due to a reducer or the like in a pipe line, are provided in upper and lower part frames, and self-propelling drive vehicles 10A, 10B thus constituted are connected. In this way, a self-propelling device 1 in the pipe line eliminates necessity for performing steering operation required for skill. Since the self-propelling drive vehicles 10A, 10B are connected, even in the case of running in an opening part in the pipe line with apprehension of dislocating each drive wheel 2A, 2B, 2C, stable running can be performed without wheel dislocation.

58. 发明专利

JPH06158875A SMOKESTACK INTERNAL WALL SURFACE WORK DEVICE 失效
公开(公告)号：JPH06158875A
公开(公告)日：1994-06-07
申请号：JP31342692
申请日：1992-11-24
申请人： CHUGOKU X RAY CO LTD
发明人： SANEMORI TAKESHI , UMEDA YUKIO
IPC分类号： E04G3/28 , C04B41/52 , E04G23/02 , E04H12/28 , G01N21/88 , G01N21/954 , E04G3/10
摘要： PURPOSE:To eliminate man power in maintenance and inspection works inside a smokestack by freely lifting and fixing a smoke guide wall surface visual inspection device and a refractory deteriorated part sampling device at any position by a lifting device. CONSTITUTION:A work device 50 is structured with a wall surface interior inspection device 4, cutting repair part 17 for repairing deteriorated parts, a lifting device 3 for lifting them and holding them at any position, etc. Also rotation mechanisms 10 and 19 which rotate freely the inspection device 4 and cutting repair device 17 are provided. Then, while the inspection device is rotated with the lifting device 3 held at a fixed position, the interior of wall surface is inspected and, if any fault is detected, a sample at the deteriorated part is taken out by the cutting repair part 17 for diagnosis of deterioration. Thus safe and economical inspection can be made without any man power.

59. 发明专利

JPH02269958A PROBE FOR FLAW DETECTION 失效
公开(公告)号：JPH02269958A
公开(公告)日：1990-11-05
申请号：JP9216789
申请日：1989-04-12
申请人： MITSUI PETROCHEMICAL IND , CHUGOKU X RAY CO LTD
发明人： OTA RYOHEI , HIOKI OSAMU , TAKATANI MITSUHIRO , KITAO KAZUNORI , KOKUBO HISAO
IPC分类号： G01N27/90
摘要： PURPOSE:To detect a defect in the circumferential direction of a conductor-made tube with high sensitivity by moving respective coils whose winding direction is parallel to the lengthwise direction of the conductor-made tube closely to the internal wall of the conductor-made tube. CONSTITUTION:The probe P for flaw detection is constituted by winding a vertical coil 2 in the longitudinal direction of a nonmagnetic body frame F formed in a cross shape and also winding a horizontal coil 3 laterally. Then the probe P is fixed to a nonmetallic holder and run in the conductor-made tube 1 through external operation as shown by an arrow K, and the probe P is excited to generate magnetic force lines B; and variation in the impedance is detected to detect whether or not the tube 1 flaws. Consequently, even if there are a tube plate 11 and a baffle 12 at the periphery of the tube 1, the disorder of the impedance due to the influence of them is canceled and a vortex flow G crosses the defect part 4 in the tube circumferential direction at right angles, so that the detection sensitivity is improved.

60. 发明专利

JPH02269957A PROBE FOR FLAW DETECTION 失效
公开(公告)号：JPH02269957A
公开(公告)日：1990-11-05
申请号：JP9216689
申请日：1989-04-12
申请人： MITSUI PETROCHEMICAL IND , CHUGOKU X RAY CO LTD
发明人： OTA RYOHEI , HIOKI OSAMU , TAKATANI MITSUHIRO , KITAO KAZUNORI , KOKUBO HISAO
IPC分类号： G01N27/90
摘要： PURPOSE:To accurately detect a defect position and to detect a defect in the circumferential direction of a tube by dividing an annular core and winding it with conductors, and detecting the defect part by individual cores independently. CONSTITUTION:The probe P for flaw detection is formed in a doughnut shape and the annular core which is rectangularly sectioned is divided equally into four core pieces 2, which are wound with the conductors 3 and held annularly while gaps A are left. Then the probe P is inserted into the tube 1 made of a conductor and slid and the respective conductors 3 are excited by an oscillator 20 to generate magnetic force lines B, a phase detector 21 detects the output signals of the respective conductors 3, and an XY display part 22 displays the phase difference as a Lissajous's pattern. Further, the phase difference signal is inputted to an arithmetic processing part 23 to calculate the total defect state, whose contents are recorded on a recorder 24. Consequently, variation in the coil impedance of the conductors 3 is detected to detect whether or not the tube 1 flaws, and the defect part 4 in the same direction with the magnetic force lines B is detected with high sensitivity.

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