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1. 发明专利

JP2004205444A Conduit inner diameter measuring method and measuring device 审中-公开
公开(公告)号：JP2004205444A
公开(公告)日：2004-07-22
申请号：JP2002377638
申请日：2002-12-26
申请人： Tokyo Gas Co Ltd , 東京瓦斯株式会社
发明人： YONEMURA YASUSHI , SUYAMA KIICHI
IPC分类号： G01B5/12 , G01B21/14
摘要： PROBLEM TO BE SOLVED: To make possible speedy and exact measurement of conduit inner diameter.
SOLUTION: In a displacement detection process S1, an inner diameter measuring pig is penetrated in the construction section of a conduit 1 and how much degree the displacement of total circumference of the conduit inner surface has progressed for a reference inner surface is detected by moving along the conduit axis. In an operation processing process S2, the detection data output from the inner measurement pig is arithmetically operated and diagonal partial sum and total circumference average are obtained for the detection data of the total circumference. In a data extraction process S3, based on the operation result in the operation processing process S2, operation results and detection data at every measuring position corresponding to selected measuring positions are output to a data display. The data display can indicated detection data extracted in the data extraction process S3 with high importance with priority. A rapid processing can be made with a reduction in the number of data to be processed because of the use of a diagonal sum and a full-peripheral average for data extraction.
COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2002162224A DETECTION METHOD OF DEFORMED PIPE 失效
公开(公告)号：JP2002162224A
公开(公告)日：2002-06-07
申请号：JP2000356462
申请日：2000-11-22
申请人： TOKYO GAS CO LTD
发明人： YONEMURA YASUSHI , SUYAMA KIICHI
IPC分类号： G01B21/22 , B61B13/10 , F16L55/00
摘要： PROBLEM TO BE SOLVED: To improve the problem that it takes time until the accordance is detected and the precision is not precise because the change of a physical am ount is compared with a route drawing to be estimated when the deformed pipe detection of a pipe inside running device exceeds a weld part. SOLUTION: Three or more running range finders are radially arranged in the pipe inside running device 1, the pulse signals of the respective rotation amounts of the range finders 4, 5 are counted separately, a difference between the numbers of pulses of each range finder 4, 5 is found, and the presence of the curved pipe of a pipe passage and its curved direction are detected.

3. 发明专利

JP2002156364A MEASUREMENT METHOD FOR MAGNETIC SENSOR 失效
公开(公告)号：JP2002156364A
公开(公告)日：2002-05-31
申请号：JP2000353053
申请日：2000-11-20
申请人： TOKYO GAS CO LTD
发明人： YONEMURA YASUSHI , SUYAMA KIICHI , MASUKO TOKUSHIGE
IPC分类号： G01N27/83
摘要： PROBLEM TO BE SOLVED: To solve the problem of conventional measuring method which is not able to fully detect fine defects or enormous defects using conventional adjustment of an amplifier, in detecting a defect in a wall of a conduit using a leakage flux pig. SOLUTION: When detecting defects in the wall of the conduit using the leakage flux pig, a magnetic sensor having a characteristic curve for detecting fine defects and a magnetic sensor having a characteristic curve for detecting enormous defects are used to detect the defect by running in the conduit respectively.

4. 发明专利

JP2002145056A TRIAXIAL SHOCK ABSORBER FOR INNER PIPE TRAVELING DEVICE 失效
公开(公告)号：JP2002145056A
公开(公告)日：2002-05-22
申请号：JP2000339419
申请日：2000-11-07
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： HONMA HIROSHI , FUJISAWA TOMOJI , YONEMURA YASUSHI , SUYAMA KIICHI
IPC分类号： B61B13/10 , F16F15/02
摘要： PROBLEM TO BE SOLVED: To provide a triaxial shock absorber of an inner pipe traveling device for preventing damage of a mounting apparatus. SOLUTION: A shock is absorbed by supporting the mounting apparatus 4 of an inspection pig 2 from the triaxial direction by shock absorbers 13, 18 and 22. The shock absorbers 13, 18 and 22 themselves are constituted so as to be slidable in the respective shaft directions by a rail guide 12, a slide rail 17 and a slide guide 21, and shock absorbing capacity is improved, and the shock absorbers can be housed in a small space.

5. 发明专利

JP2002071655A ON-OFF METHOD FOR POWER SUPPLY OF INSPECTION PIG 失效
公开(公告)号：JP2002071655A
公开(公告)日：2002-03-12
申请号：JP2000255817
申请日：2000-08-25
申请人： TOKYO GAS CO LTD
发明人： SAKASAI RYUJI , SUYAMA KIICHI , YONEMURA YASUSHI
IPC分类号： G01N29/26 , F16L55/26 , G01N21/954 , G01N27/82
摘要： PROBLEM TO BE SOLVED: To considerably reduce battery loss by suppressing loss of leaving a power supply on for the control, measurement and recording of an inspection pig that travels in a conduit, for three to four hours required from the insertion of the inspection pig in a launcher until taking it out of a receiver. SOLUTION: The power supply is switched on and off using the rotation start and rotation completion of wheels of a distance recorder of the inspection pig.

6. 发明专利

JPH08233511A PROXIMATE DISTANCE MEASURING METHOD FOR DOUBLE TUBES 失效
公开(公告)号：JPH08233511A
公开(公告)日：1996-09-13
申请号：JP4066595
申请日：1995-02-28
申请人： TOKYO GAS CO LTD
发明人： YONEMURA YASUSHI , IMAOKA TAKASHI
IPC分类号： G01B7/00 , G01B7/14
摘要： PURPOSE: To estimate the most proximate distance of double tubes by applying a plurality of graphs for the relationship between an angle and the value of magnetic flux leakage prepared beforehand and to make it possible to suppress errors with less dispersion. CONSTITUTION: An electromagnet 12 is moved and mounted at points A-H of the inner wall of a conduit 10. The electromagnet 12 is energized for sequential magnetization. The values of the magnetic flux leakages at the respective points A-H of the inner wall are measured by a Gauss meter. Then, a graph of the curve connecting the values of the magnetic flux leakages is formed based on these magnetic flux leakage values. At the same time, the site of the maximum value of magnetic flux leakage is et at an angle 0. Then, the graph of the angle/(magnetic flux leakage value) based on the actual measurement is applied on the graph of the angle/(magnetic-flux leakage value) in the most proximate distance of a plurality of the different conduits 10 and sheath tubes 11, which are know beforehand so that the graphs are not intersected. Thus, the most proximate distance can be estimated.

7. 发明专利

JP2002156365A LEAKAGE FLUX DETECTOR 失效
公开(公告)号：JP2002156365A
公开(公告)日：2002-05-31
申请号：JP2000353983
申请日：2000-11-21
申请人： TOKYO GAS CO LTD
发明人： YONEMURA YASUSHI , SUYAMA KIICHI
IPC分类号： G01N27/83
摘要： PROBLEM TO BE SOLVED: To detect microflaws, without adjusting the sensitivity of an amplifier of a leakage flux detector by improving the sensitivity of the leakage flux sensor by taking a simple technical means. SOLUTION: A ferromagnet 21 is disposed near a magnetic sensor 20 of the leakage flux detector. In this case, it is preferable that the ferromagnet 21 be attached detachable to the magnetic sensor 20 or its vicinity.

8. 发明专利

JP2002147526A VIBRATION CONTROL STRUCTURE FOR INTRA-PIPE TRAVELING DEVICE 失效
公开(公告)号：JP2002147526A
公开(公告)日：2002-05-22
申请号：JP2000339421
申请日：2000-11-07
申请人： NIPPON KOKAN KK , TOKYO GAS CO LTD
发明人： HONMA HIROSHI , YONEMURA YASUSHI , SUYAMA KIICHI
IPC分类号： B61B13/10 , F16F1/37 , F16F15/04
摘要： PROBLEM TO BE SOLVED: To provide a vibration control structure for protecting a carrying device for an intra-pipe traveling device. SOLUTION: Cases 4a, 4b and 4c wherein carrying devices 2a, 2b and 2c are accommodated are covered with a sponge (CR sponge) 5. The sponge 5 is covered with a tape 7 winding whole around the sponge 5. A space between the case 4 and a body part of an inspection pig 1 is filled with the sponge 5 and the case 4 is fixed in the inspection pig 1. By using the CR sponge as the sponge 5, the shock and the vibration are damped and absorbed to a degree that static electricity is not generated or only a slight amount of the static electricity is generated. Thus, the generation of electric noise or misoperation is prevented. The one exhibiting electrical resistance as small as the CR sponge is employed as an adhesive 6 for the tape 7 and the sponge 5.

9. 发明专利

JP2002090470A METHOD FOR MONITORING TRAVEL STATE OF PIG 失效
公开(公告)号：JP2002090470A
公开(公告)日：2002-03-27
申请号：JP2000275797
申请日：2000-09-12
申请人： TOKYO GAS CO LTD
发明人： SUYAMA KIICHI , SAKASAI RYUJI , MASUKO TOKUSHIGE , YONEMURA YASUSHI , HOTTA HISAO
IPC分类号： G01L13/00 , G01B17/00 , G01H17/00 , G01V9/00
摘要： PROBLEM TO BE SOLVED: To overcome the problem of a prior art such that the precision of position detection of a pig traveling in a duct becomes worse as the distance between a sound listening position and the pig exceeds several km when the pig 10 is tracked, the program that it becomes difficult to decide the position of the pig when the pig travels fast, and the problem that the pig is possibly broken when large differential pressure is applied across the pig. SOLUTION: A sound sensor 13 detects a shock wave that the pig generates at a weld position of the duct to track the travel direction of the pig and also monitor the difference pressure across the pig; when the pig stops traveling, a position that the pig which travels again reach its normal speed again is predicted from the differential pressure across the pig and settings of the frequency filter band and gain of the sound sensor are switched.

10. 发明专利

JP2001349846A METHOD FOR DETECTING ANGLE IN CIRCUMFERENTIAL DIRECTION OF DEVICE FOR INSPECTING INSIDE OF TUBE 失效
公开(公告)号：JP2001349846A
公开(公告)日：2001-12-21
申请号：JP2000174933
申请日：2000-06-12
申请人： TOKYO GAS CO LTD
发明人： MASUKO TOKUSHIGE , YONEMURA YASUSHI
IPC分类号： G01B21/00 , G01B21/22 , G01B21/30 , G01N21/954
摘要： PROBLEM TO BE SOLVED: To provide a method for detecting the direction of rotation of a sensor pig, even in the case where an orientation meter cannot be mounted to the sensor pig. SOLUTION: Since the sensor pig 3 is provided with a plurality of sensors 7 along the inner circumference of a pipe 1, the whole surfaces of the circumference of the pipe 1 can be inspected. No measuring devices are provided inside the sensor pig 3. Sensor control circuits, range finders, recording devices, batteries, etc., are housed in the body parts of a front pig 2 and a rear pig 4, and a first angle meter 8 and a second angle meter 9 are provided for the front pig 2 and rear pig 4, to detect the angles in the circumferential direction of the front pig 2 and rear pig 4. The angle in the circumferential direction of the sensor pig 3 is computed through the use of the output of the two angle meters, to know which sensor corresponds to which location in the circumferential direction of the pipe 1. In one method, the angle in the circumferential direction of the sensor pig 3 is obtained from the weighted mean of the first angle meter 8 and the second angle meter 9 at the same time.

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