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61. 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.

62. 发明专利

JPS6426143A FLAW DETECTING METHOD FOR FERROMAGNETIC MATERIAL PIPE 失效
公开(公告)号：JPS6426143A
公开(公告)日：1989-01-27
申请号：JP18308387
申请日：1987-07-22
申请人： TOKYO GAS CO LTD
发明人： HOSOHARA YASUHARU
IPC分类号： G01N27/90
摘要： PURPOSE:To reduce noise caused by a material, and to satisfactorily execute a flaw detection by supplying a pulse current to a DC magnetizing coil, magnetizing intermittently a pipe, and executing an eddy current flaw detection. CONSTITUTION:A base body 3 is provided with wheels 1 on the periphery, and freely movable, while holding a suitable interval against the inner wall surface, in an object pipe 2. On the periphery of the base body 3, an coil 4 for eddy current flaw detection consisting of a pair of coils 4a, 4b, and a DC magnetizing coil 5 are provided, and connected to an eddy current flaw detecting means 6, and a pulse current supply means 7, respectively. A control means 8 command the generation of a prescribed pulse current to the pulse current supply means 7, and simultaneously, operates the eddy current flaw detecting means 6 synchronously therewith. Subsequently, a cable moving device 12 is operated, and while moving the base body 3 into the pipe 2 through a cable 10, the pulse current supply means 7 and the eddy current flaw detecting means 6 are operated, and an eddy flaw detection is executed.

63. 发明专利

JPS60244885A SEARCHING METHOD OF UNDERGROUND BURIED PIPE 失效
公开(公告)号：JPS60244885A
公开(公告)日：1985-12-04
申请号：JP10144284
申请日：1984-05-18
申请人： TOKYO GAS CO LTD
发明人： FURUSAWA HAJIME , HOSOHARA YASUHARU
IPC分类号： G01S13/88 , G01V3/12
摘要： PURPOSE:To identify the material and diameter of a long-sized buried body by transmitting and receiving a signal over movement on the ground while an antenna is rotated horizontally, and calculating a received signal which varies according to the relation between the burying direction of the buried pipe and the direction of the antenna. CONSTITUTION:The burying position of the buried pipe is detected by a pulse radar system and then the antenna 1 is rotated right over the buried pipe. Then, a signal E when the transmission and reception combined type or transmission and reception separated parallel type antenna 1 becomes parallel to the burying direction of the buried pipe and a code E' when the antenna 1 becomes perpendicular to the burying direction are inputted and their levels are compared with each other to decide on a metallic pipe when E>E' or nonmetallic pipe when E

64. 发明专利

JPS5726942A Data transmission system 失效
标题翻译：数据传输系统
公开(公告)号：JPS5726942A
公开(公告)日：1982-02-13
申请号：JP10222580
申请日：1980-07-25
申请人： Tokyo Gas Co Ltd
发明人： MATSUURA MASAYUKI , SAITOU KIMIMASA , YAMAMOTO YOSHIHIRO , HOSOHARA YASUHARU
IPC分类号： H04B13/00 , H04B13/02
CPC分类号： H04B13/02
摘要： PURPOSE:To reduce the total cost including installation cost and maintenance cost, by forming a transmission line with a burried metallic conductor pipe and ground, and transmitting data carrier signal waves on the transmission line. CONSTITUTION:A data carrier signal wave is applied between a burried metallic pipe 1 and a grounded electrode E at one of two points P, P'. This carrier signal wave propagates, by taking the pipe 1 between the P, P' and ground G as a pair of transmission lines, that is, with attenuation in logarithmic proportion to a distance through the scattering in ground. The carrier signal wave attenuated through propagation can be received between the pipe 1 and the grounded electrode E' at the point P' of the P, P'.
摘要翻译：目的：通过形成具有埋地金属导体管和地面的传输线，并在传输线上传输数据载波信号波，以降低安装成本和维护成本的总成本。构成：在两个点P，P'中的一个处，在埋入金属管1和接地电极E之间施加数据载波信号波。该载波信号波通过将P，P'和地G之间的管1作为一对传输线传播，即以与地面中散射的距离成对数比例的衰减。通过传播衰减的载波信号波可以被接收在管道1和P，P'的P'点的接地电极E'之间。

65. 发明专利

JPH08240469A FLOWMETER 失效
公开(公告)号：JPH08240469A
公开(公告)日：1996-09-17
申请号：JP12601895
申请日：1995-04-26
申请人： TOKYO GAS CO LTD
发明人： NUKUI KAZUMITSU , KATO HIDEO , HOSOHARA YASUHARU , SAKAI KATSUTO , SUYAMA KIICHI , SATOU SOUBUN , SATO SHINICHI
IPC分类号： G01F1/075 , G01F1/20 , G01F7/00
摘要： PURPOSE: To measure flow rate in a wide flow rate range. CONSTITUTION: At a small flow rate time, a cutoff valve 41 closes an opening part 16, and a cutoff valve 43 opens a small flow rate measuring passage 17, and gas taken in from an inlet part 11 flows in the small flow rate measuring passage 17, and a flow rate and an integrating flow rate are measured on the basis of output of a flow speed sensor 18 arranged in the small flow rate measuring passage 17. At a large flow rate time, the cutoff valve 41 opens the opening part 16, and a flow rate and an integrating flow rate are measured on the basis of an average value of flow speed detected by plural flow speed sensors 291 , 292 and 293 arranged in a passage 15.

66. 发明专利

JPH0755751A NOISE-SUPPRESSING METHOD IN DAMAGE-MONITORING SYSTEM FOR BURIED PIPE 失效
公开(公告)号：JPH0755751A
公开(公告)日：1995-03-03
申请号：JP20323393
申请日：1993-08-17
申请人： TOKYO GAS CO LTD
发明人： HOSOHARA YASUHARU , SUYAMA KENJI
IPC分类号： G01N27/20
摘要： PURPOSE:To enable reliable detection of the damage of a buried pipe caused by an excavating blade of an excavator. CONSTITUTION:In a noise-suppressing method, a passing filter 7 for the frequency of an AC signal for monitoring is connected in parallel to a drainage 6 connected to a buried pipe 2, in a system the AC signal for monitoring impressed on the buried pipe 2 in a transmission part 1 is received in a reception part 3 located apart from the transmission part 1 and the damage of the buried pipe 2 is monitored on the basis of a reception signal. Accordingly, the noise due to the operation of the drainage 6 out of electric noise nixing in the buried pipe 2 can be suppressed, and therefore disadvantages that the fluctuation of a received voltage caused by that noise may be detected falsely as the damage, and that the fluctuation of the received voltage caused by the damage may not be detected, can be prevented.

67. 发明专利

JPH06229986A RECEIVING UNIT FOR REMOTE FIELD EDDY CURRENT FLAW DETECTOR 失效
公开(公告)号：JPH06229986A
公开(公告)日：1994-08-19
申请号：JP1537593
申请日：1993-02-02
申请人： TOKYO GAS CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU
IPC分类号： G01N27/90
摘要： PURPOSE:To better the movement of an obstacle, especially, a bend pipe part while obtaining sufficient receiving sensitivity by getting a receiving coil elastically close to the internal wall of a buried pipe in the detection of flaws. CONSTITUTION:In a remote field. eddy current flaw detector in which a flaw detection sensor having a transmitting unit having a transmitting coil and a receiving unit 4 having a receiving coil 3 are linked away at a specified distance runs in a buried pipe 33 to perform a detection at a point to be detected, the receiving unit 4 has a number of contact pieces 17 formed long in the direction of moving on the outer circumference of an apparatus body connected to the transmitting unit or the like. The contact pieces are supported with a support bar 24 drivable to expand elastically free to move inward or outward and the receiving coil 3 is set on the respective pieces 17.

68. 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.

69. 发明专利

JPH04324353A EDDY CURRENT FLAW DETECTION METHOD FOR PIPING 失效
公开(公告)号：JPH04324353A
公开(公告)日：1992-11-13
申请号：JP12215391
申请日：1991-04-24
申请人： TOKYO GAS CO LTD
发明人： HOSOHARA YASUHARU , SUZUKI KIWAMU
IPC分类号： F17D5/00 , G01N27/90
摘要： PURPOSE:To achieve a decrease in amount of memory data, a smaller size of the apparatus and a higher speed of processing by recording an amplitude or a peak value and a phase together with a distance signal only when the amplitude or the peak value is above a specified value. CONSTITUTION:A flaw detection signal having noises suppressed with a synchronous detector 4 is inputted into a phase shifter 7 via a zero adjustor 6 which is controlled with a CPU11 and a signal corresponding to an amplitude of the flaw detection signal is inputted into a peak detector 12. The detector 12 generates an interrupt signal to the CPU11 only when a peak value of the flaw detection signal exceeds a specified value while the value thereof is converted into digital from analog to be outputted to a bus 8. A signal having the amplitude exceeding a specified value is recorded into an IC memory card 16 together with the grade of the amplitude, a phase and a distance signal derived by a distance synchronous pulse. Thus, data effective for flaw detection alone are selected and recorded thereby enabling the use of even a card 16 with a limited memory capacity with a decrease on the amount of data when a long-range flaw detection is performed.

70. 发明专利

JPH04323550A METALLIC MATERIAL FLAW DETECTION DEVICE 失效
公开(公告)号：JPH04323550A
公开(公告)日：1992-11-12
申请号：JP9068591
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 contained in flaw detection data by decreasing the noise of phase detection based on the stabilization of a reception level, and improving the S/N ratio of the flaw detection data with the decrease in the noise of 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 advanced at fixed speed, the magnetic impermeability of the test tube becomes nonuniform and the level of reception signals output from the reception coils RC1-RC9 is fluctuated by the vibration of the gradually advancing eddy current sensor. In order to hold the level of the reception signals constant, an AGC circuit 10 is provided and data about flaw detection are originated by phase detection.

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