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1. 发明专利

JPS6438689A DETECTOR OF UNDERGROUND METAL CONDUIT 失效
公开(公告)号：JPS6438689A
公开(公告)日：1989-02-08
申请号：JP19264687
申请日：1987-08-03
申请人： HITACHI LTD , TOKYO GAS CO LTD , NIPPON BOSHOKU KOGYO KK
发明人： WATABIKI MASAYUKI , SONODA SHINJI , YAMAGUCHI KENICHI , SAITO KIMIMASA , ARAI MINORU
IPC分类号： G01V3/11 , G01V3/02 , G01V3/06
摘要： PURPOSE:To securely detect possibility for damage from a conduit system side by connecting a resonating circuit in which detecting current is resonated to vary in high impedance between an underground metal conduit and a corrosion preventing device. CONSTITUTION:Earth points i, i+1,... are provided at prescribed intervals on a conduit 1. On the other hand a detector 2, a power source 3 and resonating circuits 4 are connected to a conduit system 1 at a point i, and the earth side is linked to a corrosion preventing device 7. In the case where an excavator 5 damage the conduit at a damage part 6, the voltage and the current of a signal varies because the impedance is considerably low at this point. This variation is grasped by the detector 2. Further, in regard to the deciding of the damage part 6 time difference of damage signals from each point at which the detector 2 receives is computed at a relay point or at the center. Since the resonating circuits 4 are inserted at each earth part i, i+1, ..., and high impedance is formed for the signals of the power source 3, the current signal is very little from the conduit system 1 to the earth and so the signals go on long distance.

2. 发明专利

JPS62264207A ESTIMATION OF LIQUEFYING STRENGTH OF GROUND AT EARTHQUAKE 失效
公开(公告)号：JPS62264207A
公开(公告)日：1987-11-17
申请号：JP10635886
申请日：1986-05-09
申请人： TOKYO GAS CO LTD , KISO JIBAN CONSULTANTS CO LTD
发明人： SAITO KIMIMASA , IWASAKI KIMITOSHI
IPC分类号： E02D1/08 , E02D1/00 , G01N3/40
摘要： PURPOSE:To estimate the liquefying strength of the ground at earthquake by a method in which an average effective main stress is obtained, and the relation of the ratio between a tip penetrating resistance and an average effective main stress to the liquefying strength is obtained. CONSTITUTION:A cone 3 is penetrated by a rod 2 connected to a penetrator, and the tip penetrating resistance, side frictional resistance, and void water pressure during the penetration are measured on the outside through a cable in the rod 2. An average effective main stress is obtained by deducting an excess void water pressure from an average main stress obtained from the effective placing load pressure. From a relation between the ratio of the tip penetrating resistance to the average main stress and the liquefying strength, the liquefying strength of the ground during earthquake is estimated. The liquefying strength of the ground can thus be estimated with good accuracy to permit simple and active operations rich in mobility to be performed.

3. 发明专利

JPS6212885A EARTHQUAKE MOTION INTENSITY DETECTING METHOD FOR CONTROL 失效
公开(公告)号：JPS6212885A
公开(公告)日：1987-01-21
申请号：JP15185385
申请日：1985-07-10
申请人： UNIV TOKYO , TOKYO GAS CO LTD
发明人： KATAYAMA TSUNEO , SATO NOBUHIKO , DAIHO NAOTO , SAITO KIMIMASA
IPC分类号： G01V1/00 , G01V1/16
摘要： PURPOSE:To obtain a highly reliable detecting method executing control corresponding to the degree of damage by detecting the intensity of earthquake motion as a speed response corresponding to vibration energy included in a structure in addition to the maximum acceleration. CONSTITUTION:An operating part 1 is constituted so as to satisfy a prescribed equation of motion in a single-degree-of-freedom vibration system, input the acceleration of earthquake vibration as an input signal and output a speed response as an output signal. The speed response signal of the single-degree-of-freedom vibration system is momentally found out by inputting an acceleration signal of earthquake vibration obtained by an accelerometer 5 to the operating parts 1 or the speed response signal of the single-degree-of-freedom vibration system having a different inherent period is found out at a real time speed or a speed approximate to said real time speed by inputting the acceleration signal of earthquake vibration based upon the common accelerometer 5 to the proper number of operating parts 1 having an equal damping constant and different inherent periods respectively. At the generation of earthquake, the index of vibration energy included in a structure can be obtained from the speed response signal.

4. 发明专利

JPS62297777A POSITION DETECTING METHOD FOR BURIED CONDUCTOR 失效
公开(公告)号：JPS62297777A
公开(公告)日：1987-12-24
申请号：JP14174186
申请日：1986-06-17
申请人： NEC CORP , TOKYO GAS CO LTD
发明人： MIURA TOKUNORI , SAITO KIMIMASA , WASA YASUHIRO , YAMAGUCHI KENICHI
IPC分类号： G01V3/10
摘要： PURPOSE:To detect the position of a buried conductor in a short time by an easy procedure by measuring the intensity and direction of a magnetic field at >=3 points where relative positions on a plane are clear, and calculating the burying position from the optimum value of a constant of a theoretical expression of the magnetic field intensity calculated by using said measured values. CONSTITUTION:A current is supplied to the buried conductor 1 and a magnetic field produced by the current is measured by using a three-axial fluxmeter. Then, the two axes of the fluxmeter are placed on an optional plane and the fluxmeter is moved in the direction of an (x)-axia direction by (n) times (n>=3) by every specific distance to measure three axial components of a magnetic field at respective points Xn, thereby obtaining (n) measurement results (Xn HnX, Hny, Hnz). The intensity Hn and direction theta of the magnetic field at each measurement point Xn are found from a prescribed expression by using the measurement results. Then, those measured values are used to calculate the optimum value of the constant of a theoretical expression of the magnetic field intensity and the burying position of the buried conductor 1 is calculated from the prescribed expression by using the constant value.

5. 发明专利

JPS62257017A METHOD AND APPARATUS FOR COLLECTING GAS PRESSURE INFORMATION 失效
公开(公告)号：JPS62257017A
公开(公告)日：1987-11-09
申请号：JP10035786
申请日：1986-04-30
申请人： TOKYO GAS CO LTD , SANKOSHA CO LTD
发明人： SAITO KIMIMASA , SAKAGUCHI OICHI , YASUMOTO KOJI , HASHIMOTO SHUICHI
IPC分类号： G01D9/00 , G01L19/00
摘要： PURPOSE:To achieve the labor saving in measuring work, by a method wherein measuring data is inputted to a data analyzing processor directly from a data recorder for measuring and recording the pressure of gas at a measuring point at every definite interval over a definite period directly or via a data file. CONSTITUTION:The pressure of the supply gas in a gas conduit P is measured and recorded at every predetermined time over a definite period by the data recorder 1 arranged in the vicinity of the measuring point set to the specific place of the gas conduit P. Said data recorder 1 is recovered to be directly connected to the data analyzing processor 3 of an analytical center and each measuring data is inputted to the data analyzing processor 3. Further, it is possible that the data recorder 1 is continuously arranged and a data file 2 is brought to make the round of each data recorder 1 to collect the data recorded in each data recorder 1 and subsequently carried back to input the recording data to the analyzing processor 3.

6. 发明专利

JPS63191049A DETECTION OF ANTICORROSION COVER DAMAGE POSITION FOR BURIED METAL PIPES 失效
公开(公告)号：JPS63191049A
公开(公告)日：1988-08-08
申请号：JP2169087
申请日：1987-02-03
申请人： NIPPON STEEL CORP , TOKYO GAS CO LTD
发明人： KAWAKAMI MAKOTO , KURODA YOSHINORI , SAITO KIMIMASA , YAMAGUCHI KENICHI
IPC分类号： G01V3/00 , G01N27/20
摘要： PURPOSE:To detect a cover damage position accurately, by using a reference signal with the frequency the same as that of an AC signal for measurement when a ground surface potential difference is measured employing a wheel electrode. CONSTITUTION:A receiver 7 with a wheel electrode 8 is placed on the surface of ground where a metal pipe 2 provided with an anti-corrosion cover 1. An AC signal current runs is supplied by a measuring signal transmitter 6 between the metal pipe 2 and an opposed pole 5, and a potential difference is measured between two points on the ground surface with the wheel electrode 8 moving along the metal pipe 2 to be inputted into a detection signal input section of a lock-in amplifier 9. A signal with the frequency the same as that of an AC signal current is supplied from a reference signal oscillator 10 to a reference signal input section of the lock-in amplifier 9. After a noise signal with the frequency different from that of the reference signal is removed from a detection signal and changes in the phase are detected to learn the position of a cover damage part. This enables elimination of a wire for reference signal transmission thereby facilitating the detection of a damage position regardless of a longer distance between the transmitter 6 and the receiver 7.

7. 发明专利

JPS62297776A POSITION DETECTING METHOD FOR BURIED CONDUCTOR 失效
公开(公告)号：JPS62297776A
公开(公告)日：1987-12-24
申请号：JP14174086
申请日：1986-06-17
申请人： NEC CORP , TOKYO GAS CO LTD
发明人： MIURA TOKUNORI , SAITO KIMIMASA , WASA YASUHIRO , YAMAGUCHI KENICHI
IPC分类号： G01B7/00 , G01R33/02 , G01V3/08
摘要： PURPOSE:To improve the detection accuracy of a burying position and to evaluate the reliability of the detection result by obtaining plural data on a line of intersection of two planes crossing a magnetic field at right angles and calculating their mean value with respect to all combinations of two points on both sides of the rack center of magnetic sensors fixed both ends of a rack. CONSTITUTION:Plural magnetic sensors which detect a magnetic field direction are fixed on substantially the same plane nearby both ends of the long rack 3, which this rack 3 is installed on the ground surface closely right above a buried conductor for a method which supplies a current to the buried conductor 1 to find its position. Then, the magnetic field direction is measured at plural positions on the ground surface and data on lines of intersection of two planes crossing the magnetic field at right angles are found with respect to all combinations of two points on both sides of the rack center of the magnetic sensors fixed nearby both ends of the rack. Then their mean value is calculated to obtain the measurement position of the burying position with high reliability, and variance in the measurement result (e.g. standard deviation) is found to evaluate the reliability.

8. 发明专利

JPS6239856B2 失效
公开(公告)号：JPS6239856B2
公开(公告)日：1987-08-25
申请号：JP10222580
申请日：1980-07-25
申请人： TOKYO GAS CO LTD
发明人： MATSURA MASAYUKI , SAITO KIMIMASA , YAMAMOTO YOSHIHIRO , HOSOHARA YASUHARU
IPC分类号： H04B13/00 , H04B13/02

9. 发明专利

JPS6212886A EARTHQUAKE MOTION INTENSITY DETECTING METHOD FOR CONTROL 失效
公开(公告)号：JPS6212886A
公开(公告)日：1987-01-21
申请号：JP15185485
申请日：1985-07-10
申请人： UNIV TOKYO , TOKYO GAS CO LTD
发明人： KATAYAMA TSUNEO , SATO NOBUHIKO , DAIHO NAOTO , SAITO KIMIMASA
IPC分类号： G01V1/00 , G01V1/16 , G01V1/28
摘要： PURPOSE:To obtain a highly reliable detecting method corresponding to the degree of damage by detecting the intensity of earthquake motion as a speed response corresponding to the vibration energy included in a structure in addition to the maximum acceleration corresponding to force to be applied to the structure. CONSTITUTION:Each operating part 1 is formed so as to satisfy a prescribed equation of motion in a single-degree-of-freedom vibration system, input the acceleration of earthquake vibration as an input signal and output a speed response as an output signal. The speed response signal of the single-degree-of-freedom vibration system is momentally found out by inputting an acceleration signal of earthquake vibration obtained by an accelerometer 5 to the operating parts 1 or the speed response signal of the single-degree-of-freedom vibration system having different inherent period is momentally found out by inputting the acceleration signal of earthquake vibration based upon the common accelerometer 5 to the proper number of operating parts 1 having different inherent period respectively. Thereby, the index of vibration energy included in a structure at the generation of earthquake is obtained from the speed response signal, the index and the acceleration signal are compared with respective set values, and when the acceleration of earthquake vibration exceeds a prescribed value or when the index exceeds a prescribed value, a control signal is generated.

10. 发明专利

JPS6212884A EARTHQUAKE MOTION INTENSITY DETECTION METHOD FOR CONTROL 失效
公开(公告)号：JPS6212884A
公开(公告)日：1987-01-21
申请号：JP15185285
申请日：1985-07-10
申请人： UNIV TOKYO , TOKYO GAS CO LTD
发明人： KATAYAMA TSUNEO , SATO NOBUHIKO , DAIHO NAOTO , SAITO KIMIMASA
IPC分类号： G01V1/00 , G01V1/16 , G01V1/28
摘要： PURPOSE:To obtain a highly reliable detecting method executing control corresponding to the degree of damage by detecting the intensity of earthquake motion as a speed response corresponding to vibration energy included in a structure in addition to the maximum acceleration. CONSTITUTION:The 1st and 2nd integrating parts 2, 3 are successively connected to the output side of an adding part 1 for calculating the sum of plural input signals. An acceleration signal of an accelerometer 4 is inputted to the adding part 1 and a signal obtained by multiplying the output signal of the integrating part 2 by twice the product of an inherent angular frequency and a damping constant and a signal obtained by multiplying the output signal of the integrating part 3 by the square of the inherent angular frequency are inputted to the adding part 1 through multiplying parts 5, 6 respectively. Consequently, a prescribed equation of motion in a single-degree- of-freedom vibration system can be satisfied and a speed response signal is obtained as the output signal of the integrating part 2. The method makes it possible to obtain the index of the vibration energy included in a structure at the generation of earthquake and various systems are controlled on the basis of the index, so that control having high correlation with the degree of damage can be attained.

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