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1. 发明专利

JPH10318478A IN-PIPELINE TRAVELING DEVICE 失效
公开(公告)号：JPH10318478A
公开(公告)日：1998-12-04
申请号：JP12446897
申请日：1997-05-14
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： SUYAMA KIICHI , MIZUKAMI SEIJI , KAWABE SHUNEI , IMON YOSHIO
IPC分类号： F16L55/00 , F16L55/16 , F16L55/28
摘要： PROBLEM TO BE SOLVED: To smoothly travel in a bent pipe and graspe duct form by making the center axis of a travel device body always accord with that of a pipe in traveling, and simultaneously measuring the travel distance and direction of a self-propelled car itself. SOLUTION: Traveling wheels 5 to be rotated by a driving mechanism are journalled on respective other ends of two pairs of wheels supporting arms 3a, 3a' and 3b, 3b', and energized in the pipe wall surface direction by each spring of sliders 2a and 2b, and forcibly pressed to a pipe wall surface under pressure. The travel device is equipped with an angle measuring arm 10 as an angle measuring mechanism, and an angle measuring roller 11 journalled on the tip part also is always forcibly pressed to an inner wall of the pipe under pressure, and then tilting angle data are outputted from four rotary potentiometers P1, P2, P3 and P4 attached with the angle measuring arm 10. The driving mechanism is controlled so that each measured angle of a pair of opposing wheel supporting arms coincides, thereby driving the traveling wheel 4, and then the device body is always pointed in the axial direction of piping, ensuring its automatic traveling.

2. 发明专利

JPH0843356A METAL PIPE FLAW SENSOR AND FLAW DETECTING METHOD 失效
公开(公告)号：JPH0843356A
公开(公告)日：1996-02-16
申请号：JP18010894
申请日：1994-08-01
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , CHIBA GIICHI , KINOSHITA AKIRA , AKITA MASANORI , WASHIMI TAKASHI , KAWABE SHUNEI
IPC分类号： G01N27/90
摘要： PURPOSE:To conduct flaw detection for the inner wall of a metal pipe effectively and accurately with one time of scanning. CONSTITUTION:A metal pipe flaw detection sensor 7 is equipped with an exciting coil 8 fed with an exciting signal to generate a magnetic field due to a remote field eddy current and the first signal reception coil group 9 and the second signal reception coil group 10 to receive magnetic field generated by the exciting coil 8 and passing through the wall thickness of the metal pipe and to emit a sensing signal which are installed on the bore surface of the pipe at a specified spacing. The first reception coils 9a and second reception coils 10a are arranged zigzag, and behind them a third reception coil 11 is furnished. The coil axis of the second reception coils 10a is positioned perpendicular to the pipe axis, while the coil axis of the third reception coil 11 is positioned parallel with the pipe axis. Thereby the magnetic characteristics of the metal pipe are sensed by the third reception coil 11, and existence of flaw and eventual depth are sensed precisely by the third reception coil 10a.

3. 发明专利

JPH09112800A ENTERING WATER DETERMINING DEVICE 失效
公开(公告)号：JPH09112800A
公开(公告)日：1997-05-02
申请号：JP27150295
申请日：1995-10-19
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： IIMURA SHOICHI , NAGANUMA TETSUO , KAWABE SHUNEI
IPC分类号： G01V5/00 , F17D5/02 , G01M3/04
摘要： PROBLEM TO BE SOLVED: To determine the propriety of gas supply by non-destructively measuring the quantity of water entering the inside of pipe burried underground. SOLUTION: This device comprises radiation irradiating means to irradiates a pipe 1 with radiation; transmitted radiation measuring means 3 to detect the radiation transmitted through the pipe 1, convert the same into an electric signal and output it; a retaining member 4 to retain the transmitted radiation measuring means 3 as well as the radiation irradiation means 2 on the object to be detected; determining means 50 to perform comparison between a reference value specified according to the dia. and the quality of the pipe 1 and the electric signal, estimate the quantity of water W entering the inside of the pipe 1, and then determine the propriety of gas supply; and determination result dispaly means 55 to display the result. This device is further provided with correction means 57 to correct the quantity of transmitted radiation influenced by natural destruction; and numerical value display means to display the results of calculation after caluculating the quantity of entering water as a divided- circle height (h). The propriety of supplying gas to an existing gas pipe can therefore be determined and displayed speedily in a non-destructive manner.

4. 发明专利

JPH07146374A DEVICE AND METHOD FOR LOCATING BURIED PIPELINE 失效
公开(公告)号：JPH07146374A
公开(公告)日：1995-06-06
申请号：JP29357093
申请日：1993-11-24
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： SAITO TAKESHI , SUYAMA KENJI , SUZUKI KIWAMU , KAWABE SHUNEI
IPC分类号： E02F9/26 , G01V3/10
摘要： PURPOSE:To accurately locate a buried pipeline from the ground surface without digging the ground by utilizing a magnetic field. CONSTITUTION:A transmission coil TC generates a magnetic field against a buried supply pipe 21 and a reception coil RC1 detects the magnetic field and outputs received signals. The received signals are amplified to a prescribed level and an amplitude signal output module RB1 rectifies the signals and outputs amplitude signals. A phase difference signal output module RQ1 compares the received signals with a reference signal outputted from a transmitter TRA and outputs the compared results as phase difference signals. When the amplitude signals and phase difference signals are used jointly, the underground supply pipe 21 can be located without digging the ground.

5. 发明专利

JPH04350553A METAL MATERIAL FLAW DETECTOR 失效
公开(公告)号：JPH04350553A
公开(公告)日：1992-12-04
申请号：JP12129191
申请日：1991-05-27
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU , KAWABE SHUNEI
IPC分类号： G01N27/90
摘要： PURPOSE:To enable the diagnosing of a defect of a sample pipe at a high accuracy by making an AC signal with a phase and an amplitude preset overlap a received signal to be outputted from a receiving coil to prevent the generation of an abnormal flaw detection data. CONSTITUTION:An excitation signal f0 is applied to an excitation coil EC to generate received signals f1-f9 in receiving coils RC1-RC9, a noise of the same phase and a high frequency component are removed with a differential amplifier 7 of received signal interfaces RB1-RB9 and LPF8 and the results are applied to an adder 11. On the other hand, the signal f0 is applied to an addition terminal RT1 of addition signal processing modules RCC1-RCC9 and attenuated with an attenuator 5 of addition signal generation modules RA1-RA9. A phase angle is set 6, for example, at 15, an addition signal delayed in the phase angle by 15 is applied to a received signal modules RQ1-RQ9 to be added 11 to the signals f1-f9 applied previously and a noise is removed to send the results to a phase comparator 13 being kept at a fixed level. This enables stable phase detection thereby outputting a normal flaw detection data to a flaw detection data terminal RT5.

6. 发明专利

JPH04323551A METALLIC MATERIAL FLAW DETECTION DEVICE 失效
公开(公告)号：JPH04323551A
公开(公告)日：1992-11-12
申请号：JP9069191
申请日：1991-04-22
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU , KAWABE SHUNEI
IPC分类号： G01N27/90
摘要： PURPOSE:To prevent accumulation of abnormal flaw detection data due to phase detection noise involved in data about flaw detection by enhancing the efficiency of phase detection using reception signals extracted from a defective portion, and improving the noise of the phase detection and the S/N ratio of data about flaw detection through the enhancement of the efficiency of the phase detection. CONSTITUTION:When an eddy current sensor comprised of an exciting coil EC and reception coils RC1-RC9 is inserted into a test tube and is gradually moved at fixed speed, reception signals are output from the sound portion and defective portion of the test tube. The reception signals output from the sound portion are eliminated by a limiter circuit 10 and only the reception signals of the defective portion are extracted. The extracted reception signals of the defective portion are subjected to phase detection so as to originate data on flaw detection. A plurality of reception coils are provided along the inner wall of the test tube.

7. 发明专利

JPH04158257A FLAW DETECTOR FOR METALLIC MATERIAL 失效
公开(公告)号：JPH04158257A
公开(公告)日：1992-06-01
申请号：JP28380890
申请日：1990-10-22
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU , KAWABE SHUNEI
IPC分类号： G01N27/90
摘要： PURPOSE:To prevent abnormal flaw detection data from being created by removing drift noise via a filter from a received signal which is output from a receiving coil which receives remote field vortex flow of a metallic material to be inspected. CONSTITUTION:Respective receiving terminals RT4... of a plurality of received signal processing modules RQ1 to RQ9 of a received signal circuit RCC are connected to excitation terminals T1 to T9 of an excitation signal send-out circuit 1. Respective phase comparators 12... admit received signals f1 to f9 generated on receiving coils RC1 to RC9 of a vortex flow sensor PRB at one input, which are to be compared with reference signals F1 to F9 respectively which are input to the other input. Here the signals f1 to f9 at an output of a BPF 9 are at an illegal level ILL including drift noise due to vibrations, etc., but they are normal received signals NOF when dc components are removed by an HPF 10 and flaw detection data output from the comparator 12 is also normal flaw detection data NOD. If comparison 12 is made with the level ILL maintained, an abnormal received signal ILF and abnormal flow detection data ILD are created.

8. 发明专利

JP2002228602A PLASTIC RESIN PIPE DETECTOR 失效
公开(公告)号：JP2002228602A
公开(公告)日：2002-08-14
申请号：JP2001024401
申请日：2001-01-31
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： KOSEKI MASATO , MIZUKAMI SEIJI , KAWABE SHUNEI
IPC分类号： G01N23/09 , F16L1/00 , G01N23/20 , G01N33/44 , G21G4/02 , G21H5/00
摘要： PROBLEM TO BE SOLVED: To judge the presence or absence of a plastic resin pipe within an embedded gas supply metal pipe. SOLUTION: The gas supply metal pipe DP is irradiated with fast neutrons from a neutron source and neutrons are reflected/transmitted by a plastic resin pipe PE when the plastic resin pipe PE is inserted into the gas supply metal pipe to lose energy to become thermal neutrons. The thermal neutrons are counted for a definite time by a thermal neutron measuring module and the correction of attenuation due to natural decay based on a calender time RTC is performed and the correction value is compared with a predetermined threshold value to judge the presence or absence of the plastic resin pipe.

9. 发明专利

JPH09329585A SENSOR AND APPARATUS FOR FLAW DETECTION OF METAL PIPE 失效
公开(公告)号：JPH09329585A
公开(公告)日：1997-12-22
申请号：JP14745796
申请日：1996-06-10
申请人： TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK , CHUGOKU X RAY CO LTD
发明人： SUYAMA KIICHI , MORITA KENJI , KINOSHITA AKIRA , HAYASHI KENICHIRO , KAWABE SHUNEI , IMON YOSHIO
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To obtain a sensor and an apparatus which are not affected by an external noise, which are lightweight and which eliminate an error by amplifying received signals by a plurality of receiving coils to be at a prescribed level so as to be converted into digital signals at respective channels corresponding to the respectively receiving coils and sending out serially the received signals as the digital signals by a parallel/serial converter in a time-sharing manner in the order of the channels. SOLUTION: A receiving coil group 9 which is arranged and installed at a remote-field eddy current sensor 7 is constituted of a plurality of receiving coils RC1 to RCn , the coils receive remote-field eddy currents which are prorated inside the thick wall of a metal pipe 6 and which are generated by an exciting coil 8, and they output weal AC signals at several to several tens of μV. Received signals which are output are connected to corresponding input terminals which are arranged and installed inside a parallel/serial conversion unit 10 by using (n) pairs of transmission cables. The signals are converted into serial digital signals by a parallel/serial conversion module PS inside the conversion unit 10, and they are connected to a remote-field metal pipe-flaw detection apparatus via a cable 11 for signal transmission.

10. 发明专利

JPH05149925A APPARATUS FOR MEASURING CHARACTERISTIC OF CABLE FOR INSPECTION OF FLAW IN METALLIC MATERIAL 失效
公开(公告)号：JPH05149925A
公开(公告)日：1993-06-15
申请号：JP22392091
申请日：1991-09-04
申请人： TOKYO GAS CO LTD , CHUGOKU X RAY CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU , FUJIWARA SHIGERU , KAWABE SHUNEI
IPC分类号： G01N27/90
摘要： PURPOSE:To improve S/N of the data of flaw detection by measuring an induction level related to an exciting coil and the like of a flaw inspecting cable for metallic material in a remote-field vortex method, preventing the abnormal flaw detection data of a metallic-material-flaw detecting apparatus with the disturbance noises generated by the induction levels of the shielded core wires of the flaw inspecting cable for metallic material, and preventing the abnormalities in the flaw detection data. CONSTITUTION:A measuring sensor formed of an exciting coil 14 and terminal resistors R1-R8 is inserted into a metal tube under test EQ1. The shielded core wire of a flaw inspecting cable CBL for metallic material is connected to the exciting coil 1, which generates remotefield vortexes. Other shielded wires are connected to the terminal resistors R1-R8, which are provided at the places separated from the exciting coil 1 by specified intervals. Then, the induction level in the flaw inspecting cable CBL for the metallic material, which is connected to the exciting coil 1 and the terminal resistors R1-R8, can be measured with an induction-level measuring device 20, to which the flaw inspecting cable CBL for the metallic material is connected.

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