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31. 发明专利

JPH0257917A DETECTOR OF ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPH0257917A
公开(公告)日：1990-02-27
申请号：JP20838788
申请日：1988-08-24
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO
IPC分类号： G01F1/58
摘要： PURPOSE:To enable reduction of a burden on a amplifier by providing an exciting coil made of a superconducting material and a magnetic path forming member made also of the superconducting material and positioned in the vicinity of an electrode outside a measuring tube. CONSTITUTION:Exciting coils 4 (4a, 4b) made of a superconducting material are provided above and blow a measuring tube 1, while a magnetic path forming member 5 made of the superconducting material is provided between the coils 4. A conductive fluid flows through the measuring tube 1, and the direction of a magnetic field generated by making a current flow through the coils 4 is varied by the member 5 and made vertical substantially in the measuring tube 1. On the occasion, an electromotive force being proportional to the flow rate of the fluid flowing through the measuring tube 1 and to the intensity of the magnetic field in the tube is generated between a pair electrodes 3 provided in the measuring tube 1. This electromotive force is taken outside by flow rate signal lines 8 (8a, 8b) and turns to be a measured value. By forming the coils 4 and the member 5 of the superconducting material in this way, a flow rate siGnal can be read, as it is, without any amplification thereof.

32. 发明专利

JPH01263523A ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPH01263523A
公开(公告)日：1989-10-20
申请号：JP9144188
申请日：1988-04-15
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO
IPC分类号： G01F1/58
摘要： PURPOSE:To lessen a weight and to reduce a measuring error, by a method wherein the value of a current made to flow through each of exciting coils provided in a plurality of sets is controlled by using an exciting current control device. CONSTITUTION:A detector 4 detecting a flow rate signal and a converter 1 amplifying and outputting the flow rate signal are connected by an exciting current control line 6, a magnetic detection line 7 and a flow rate detection line 8. The control line 6 and the detection line 7 are connected to an exciting current control circuit 3 provided in the converter 1, while the signal line 8 is connected to a flow rate signal processing circuit 2 provided in the converter 1. Inside the detector 4 a measuring tube 9 provided with an insulative lining 10 is provided, and a couple of electrodes 12 are fitted at the central position of the measuring tube 9. Besides, magnetic poles 15a, 15b and 15c formed of a ferromagnetic substance are disposed vertically in the measuring tube 9, and exciting coils 16a, 16b and 16c are wound on the magnetic poles respectively. By controlling the value of a current made to flow through each of the exciting coils 16a, 16b and 16c by using the circuit 3, an extension in the direction of the tube axis of a magnetic flux density distribution inside the measuring tube can be lessened.

33. 发明专利

JPS6488767A PARALLEL COMPUTER 失效
公开(公告)号：JPS6488767A
公开(公告)日：1989-04-03
申请号：JP24383987
申请日：1987-09-30
申请人： HITACHI LTD
发明人： MUKAI HIROSHI , IKEGAWA MASAHIRO
IPC分类号： G06F15/16 , G06F15/177 , G06F15/80
摘要： PURPOSE:To shorten the overall processing time needed from the input of data to the output of the result of calculation by performing the parallel division of elements by all arithmetic units, estimating the unevenness of arithmetic loads proportional to the number of divided elements from this number, and then carrying out again the division of blocks and elements. CONSTITUTION:A control unit 103 divides an original form obtained from a coordinate value into blocks in the same number as the number of arithmetic units 1011-1014 and with the same connecting relation. The coordinate values of block boundaries and the boundary dividing number only are outputted to the units 1011-1014 corresponding to those divided blocks. Then the units 1011-1014 divide elements simultaneously and in parallel based on the data given from the unit 103. In such a way, coordinate data on elements can be produced on each arithmetic unit in a short time. Furthermore the unit 103 compares the element numbers of the units 1011-1014 with each other and divides again the block to obtain an even number of elements. Thus the even arithmetic load is secured with improvement of the parallel forming efficiency. Then the overall processing time is reduced for a parallel computer.

34. 发明专利

JPS6475914A ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPS6475914A
公开(公告)日：1989-03-22
申请号：JP23221487
申请日：1987-09-18
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO
IPC分类号： G01F1/58
摘要： PURPOSE:To reduce measuring errors due to the material of a pipe, to shorten the length of a measuring pipe and to decrease the weight, by controlling the value of a current, which is made to flow through each coil with an exciting current controlling circuit, and setting the distribution of magnetic flux density in the measuring pipe arbitrarily. CONSTITUTION:Fluid is made to pass through a measuring pipe 8, on the surface of which an insulating lining 9 is provided, in a detector 2. A pair of electrodes 10 are attached at the central position in the axial direction of the pipe 8. Flow rate signal lines 7 are connected to the electrodes. A flow rate signal is outputted to a converter 1. Ferromagnetic bodies 11 are arranged at the upper and lower parts of the pipe 8. Each magnetic pole is wound with an exciting coil 12. Exciting current control lines 6 are connected to the coils. When currents are made to flow from an exciting current control circuit 4, a magnetic field in the approximately vertical direction is generated in the pipe 8. The currents flowing through the coils at both ends are made equal based on the symmetry of the magnetic flux density in the pipe 8. The current flowing through the central coil is set so that the absolute value in the reverse direction is large with respect to the currents at both ends. In this way, leaking magnetic flux into a pipe 5 is decreased, and the effect of the material of the pipe 5 is not received.

35. 发明专利

JPS63266313A DETECTOR OF ELECTROMAGNETIC FLOW METER 失效
公开(公告)号：JPS63266313A
公开(公告)日：1988-11-02
申请号：JP9981787
申请日：1987-04-24
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO , UEMATSU IKUO
IPC分类号： G01F1/58
摘要： PURPOSE:To shorten the length of a measuring tube by making the length in the tubular axis direction of the tip face of a magnetic pole shorter than the length in the tubular axis direction of the magnetic pole in an exciting coil part. CONSTITUTION:The titled detector consists of a measuring tube 1 in which insulating lining is applied to the inside surface, a magnetic field generating part having exciting coils 5a, 5b and magnetic poles 4a, 4b for generating a magnetic field in the diameter direction of the measuring tube 1, electrodes 3a, 3b which are positioned on one straight line being orthogonal to the magnetic field direction and the flow velocity direction, respectively, and an external cylinder 7 for fixing the whole. Also, the length in the tubular axis direction of the tip face of the magnetic poles 4a, 4b is made shorter than the length in the tubular axis direction of the magnetic poles 4a, 4b in the exciting coil part, and the range in the tubular axis direction centering around the electrode position of the generated magnetic field is narrowed.

36. 发明专利

JPS55114805A COOLING CONSTRUCTION FOR TURBINE MOVING BLADE 失效
公开(公告)号：JPS55114805A
公开(公告)日：1980-09-04
申请号：JP2186179
申请日：1979-02-28
申请人： HITACHI LTD
发明人： NAKAYAMA HISASHI , IKEGAWA MASAHIRO , TORII TAKUJI
IPC分类号： F01D5/18
摘要： PURPOSE:To enable a blade of the turbine to be uniformly and effectively cooled, by arranging a porous material in the coolant flow lines provided under the blade surface and allowing the coolant to flow making a contact fully with circumferences of the above described flow lines. CONSTITUTION:A blade unit 1 of the turbine moving blade is constructed by a core 2 and a skin 3. A plurality of fine grooves 4 are radially provided on a surface of the core 2. A coolant flow line 5 is constructed under a surface of the blade by the fine groove 4 and the skin 3. While in the interior of a base mount 6, base mount flow lines 8 linked to coolant supplying guide holes 7 are formed and connected to the above described flow lines 5. Here in the flow line 5, is arranged a porous material 11 of fine mesh like wire net, powdery sintered metal, spongy metal, etc. In this way, the coolant flows in the flow line 5 toward the outer end of the blade by the action of the centrifugal force simultaneously flows spreading fully in the flow line 5 by the capillary attraction of the porous material 11, thus achieving the expected purpose.

37. 发明专利

JPH07123506A CURRENT COLLECTOR 失效
公开(公告)号：JPH07123506A
公开(公告)日：1995-05-12
申请号：JP26689193
申请日：1993-10-26
申请人： HITACHI LTD
发明人： KOBAYASHI KENJI , TAKANO YASUSHI , IIDA AKIYOSHI , IKEGAWA MASAHIRO , HAGIWARA SHUYA , HATTORI MORISHIGE
IPC分类号： B61D49/00 , B60L5/08 , B60L5/22 , G10K11/16
摘要： PURPOSE:To reduce aerodynamic noise significantly by arranging a conductor for the power collected through a currecn collector the load side downstream of an insulator where the disturbance is gentle while shifting. CONSTITUTION:A current collector 3 is fixed rockingly in the advancing direction of an electric vehicle onto the roof thereof through an insulator 4 planted rotatably through a turning mechanism 13. Two sliders 2 on a feeder 1 are disposed on the current collector 3 perpendicularly to the feeder 1. A conductor 5 is connected with a power cable on the rear side of the current collector 37, with the slider 2. An insulator base 17 for supporting the conductor 5 is secured while being shifted from the insulator 4 in the breadthwise direction of the electric vehicle and the collected power is fed to the load side through the cable 12. This structure reduces aerodynamic noise effectively at the time of running of the electric vehicle.

38. 发明专利

JPH07107609A CURRENT COLLECTOR WITH ATTITUDE CONTROL 失效
公开(公告)号：JPH07107609A
公开(公告)日：1995-04-21
申请号：JP24424093
申请日：1993-09-30
申请人： HITACHI LTD
发明人： KOBAYASHI KENJI , MAKINO TOSHIAKI , TAKANO YASUSHI , IIDA AKIYOSHI , IKEGAWA MASAHIRO , HATTORI MORISHIGE
IPC分类号： B60L5/08 , B60L5/20 , B60L5/22
摘要： PURPOSE:To obtain a stabilized current collection performance by providing an attitude control means for regulating the angle of attack of a current collecting section with respect to the vehicle body thereby inhibiting abrupt fluctuation of lift acting on a current collecting body when the vehicle enters into a tunnel or leaves the tunnel or when two vehicles pass each other in the tunnel. CONSTITUTION:A plurality of pressure sensors 7 are disposed at predetermined positions of a vehicle body in front of a current collector 17 in the advancing direction of the vehicle. Signals from the pressure sensors 7 are amplified through a dynamic amplifier 8 and fed to a controller 9 which calculates a target movement of a driving mechanism 13 required for the attitude control of the current collector 17 based on the information received through the dynamic amplifier 8. A signal corresponding to the target movement is then fed through a servo amplifier 10 to a servo valve 11 which is thereby controlled. The servo valve 11 controls the oil supply from a hydraulic source to displace a driver 6 by the target movement thus performing the attitude control for inclining the current collecting body forward by an angle theta in the advancing direction 25 of vehicle with respect to the current collector 17.

39. 发明专利

JPH07107604A CURRENT COLLECTOR 失效
公开(公告)号：JPH07107604A
公开(公告)日：1995-04-21
申请号：JP24424193
申请日：1993-09-30
申请人： HITACHI LTD
发明人： KATO CHIYUKI , IKEGAWA MASAHIRO , TAKANO YASUSHI , IIDA AKIYOSHI , KOBAYASHI KENJI , HATTORI MORISHIGE
IPC分类号： B61D49/00 , B60L5/08 , G10K11/16
摘要： PURPOSE:To provide a low noise current collector which is not susceptible to fluctuation of hydraulic force and suitably employed in high speed rolling stock. CONSTITUTION:The current collector comprises a slider 8 for collecting power from a stringing 1, a current collecting body 7 holding the slider 8, a vent 9 for reducing the hydraulic force acting on the current collecting body 7, an insulator 5 supporting the current collecting body 7, and a cable head 6 for conducting power collected through the slider 8 to a vehicle.

40. 发明专利

JPH04319767A NUMERICAL ANALYSIS METHOD FOR FLOWING FIELD WITH MOVING OBJECT 失效
公开(公告)号：JPH04319767A
公开(公告)日：1992-11-10
申请号：JP8813991
申请日：1991-04-19
申请人： HITACHI LTD
发明人： KATO CHIYUKI , IKEGAWA MASAHIRO , KAIHO MASAYUKI , KO YOSHIMITSU
IPC分类号： G06F17/10
摘要： PURPOSE:To suppress the increment of calculation volume due to the movement of an object such as the analysis of aerodynaic characteristics formed around a traveling vehicle to its minimum by obtaining the mesh cell number of the other mesh to which a connection border node of one mesh system belongs from a mesh cell to which the border node concerned belongs in the preceding calculation step and its adjacent mesh cells and exchanging the information of a flow field on the border node. CONSTITUTION:In step 1, calculation parameters such as the moving speed of a circular cylinder, a calculation time and the number of calculation steps are inputted, and in step 2, the node coordinates and element data of meshes around the cylinder and the meshes of the whole flow field are inputted. In step 3, a table for referring the mesh numbers of adjacent meshes from respective inputted mesh data is formed. At new time, the mesh cell number of the other mesh to which the connection border node of one mesh belongs is retrieved based upon the mesh cell to which the border node belongs in the preceding calculation step and its adjacent mesh cells.

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