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1. 发明专利

CA1105558A EXCITATION CONTROL APPARATUS FOR A GENERATOR 未知
公开(公告)号：CA1105558A
公开(公告)日：1981-07-21
申请号：CA299954
申请日：1978-03-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AOTSU HIROAKI , ISONO AKIRA , GOTO MASUO , KIMURA KOICHI , MOMOCHI YASUSHI , KAI TAKAAKI , KITAMURA SATOSHI , KAIHARA AKIHISA , OKADA HIROSI
IPC分类号： H02J3/50 , H02P9/10 , H02P9/14 , H02P9/30
摘要： 39/11 EXCITATION CONTROL APPARATUS FOR A GENERATOR A field control apparatus for a generator having a field winding comprises a terminal voltage control unit for controlling a field current of the generator in accordance with a difference between a terminal voltage signal of the generator and a reference voltage signal, which control unit has at least one of a line drop compensation function, an under-excitation limitation function, an over-excitation limitation function, a power factor regulation function, an armature winding over-current compensation function and a cross-current compensation function. The field control apparatus includes a detector as a common signal source for detecting active power and reactive power components at an output terminal of the generator and means responsive to the output of the detector for performing scalar operation in accordance with a function of the added compensation/control function described above. An output of the operating means is added to the differential signal as an added function signal to control the field current for excitation of the field winding.

2. 发明专利

JPS6072351A METHOD FOR SUPERVISING OPERATING CONDITION OF PACKET COMMUNICATION SYSTEM 失效
公开(公告)号：JPS6072351A
公开(公告)日：1985-04-24
申请号：JP17805283
申请日：1983-09-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： FUJIWARA HIROSHI , KAI TAKAAKI , TANUMA KAZUO
IPC分类号： H04L12/26
摘要： PURPOSE:To retrieve and identify a fault occurring point without stopping the operation of a system to improve the operating rate and transmission efficiency of a network, by utilizing the confirmation of the return of a confirm signal and general communication. CONSTITUTION:In the operation of a processor 4 in a node 3, packet data contain a transmitting address and destination address and, when an optional node 3 properly receives packet data and unless it is in an abnormal condition, the optional node 3 returns reception confirming data to the transmitting node 3 within a specified time. The transmitting node 3 checks whether the reception confirming data are returned within the fixed time or not and, when the data are not returned, repeats the transmission for a fixed time. When the data are not returned even when the transmission is repeated for a fixed time, the transmitting node 3 judges that the optional node 3 is in fault. Then the transmitting node 3 informs all other nodes 3 of the fault by general communication.

3. 发明专利

JPS603572A AREA RADIATION MONITORING DEVICE 失效
公开(公告)号：JPS603572A
公开(公告)日：1985-01-09
申请号：JP11081183
申请日：1983-06-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： FUJIWARA HIROSHI , KAI TAKAAKI , TAKAMORI KATSUHISA , YAMAZAKI TAKAAKI
IPC分类号： G01T1/16 , G01T1/167
摘要： PURPOSE:To obtain a titled device having an excellent capacity for diagnosing the abnormality of a plant by providing a storage means for storing the past radiation level, a display means and a processing device on an area radiation monitor panel, and displaying the variation of the radiation level with the lapse of time. CONSTITUTION:An area radiation monitor panel 2 is formed by a dose rate input part 7 for inputting the output signal of a logarithmic dose-rate-meter 4, a processor part 6 for executing a processing and an operation of a data, a display part 9 for displaying the result of the processing, a memory part 10 for storing a data program, and an internal bus 8 for connecting them. For instance, the dose rate data of a one month portion is displayed graphically by using a CRT picture, the alarm level of the area concerned and an average value of every date are displayed graphically in a lump with the one month portion on the picture, and the variation of the dose rate of one month can be grasped as a history.

4. 发明专利

JPS59218979A MONITORING DEVICE OF RADIANT RAY LEVEL 失效
公开(公告)号：JPS59218979A
公开(公告)日：1984-12-10
申请号：JP9245283
申请日：1983-05-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： FUJIWARA HIROSHI , KAI TAKAAKI
IPC分类号： G01T1/16 , G01T1/17 , G01T7/00 , G01T1/169
摘要： PURPOSE:To attain radiant ray monitoring having high measuring accuracy and stability by measuring a radiant ray level digitally at ordinary time, and inputting a mimic signal at the time of self-diagnosis and obtaining a prescribed radiant ray level measuring value to self-diagnose the measuring functions. CONSTITUTION:Processor parts 32, 56 are provided in a radiation measuring terminal office 31 and a central control office 41 and pulse signals outputted from a radiant ray detector 1 are counted up in the radiant ray measuring terminal office 31 on the basis of the digital counting method. In the self-diagnosis mode, mimic pulses are counted out and the counted value is converted into a dose rate by soft processing. Since the titled device is allowed to perform time sharing multi-transmission with the central control office 41, the device can measure a radiant ray dose rate with higher maintenance and accuracy than that of a device using an ordinary analog rate meter. In addition, monitoring functions such as the display of integrated dose rate and the display of an average value can be improved.

5. 发明专利

JPS58223774A Radiation monitoring device 失效
标题翻译：辐射监测装置
公开(公告)号：JPS58223774A
公开(公告)日：1983-12-26
申请号：JP10680482
申请日：1982-06-23
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： YAMAZAKI TAKAAKI , FUJIWARA HIROSHI , KAI TAKAAKI
IPC分类号： G01T1/00 , G01T1/16 , G01T1/17 , G08C15/06 , G08C19/00
CPC分类号： G01T1/17
摘要： PURPOSE:To reduce the cost of cable laying and to improve flexibility, by carrying out the periodic fetch of a dosage rate, multiplex transmission, and statistical processing of data through the operations of processors provided to a dosage meter terminal station and a central control station. CONSTITUTION:Outputs pulses 7 from a detector 1 at the dosage meter terminal station 23 are sent to a logarithmic dose rate meter 10, whose output dosage rate signal 40 is sent to an analog signal processing part 22. The processing part 22 stores dosage rate data in the form of a digital signal in a memory 18. A transmission control part 19 sends an interruption signal to a processor 20 at a request from the central control station 31 and an up-to-date dosage rate is sent to the station 31. The station 31 stores the dosage rate value in a memory 25 and performs display and recording and a processor 26 calculates integral dosage in each radiation atmosphere to average the dosage within a specific period.
摘要翻译：目的：为了降低电缆敷设的成本和提高灵活性，通过定期获取剂量率，多重传输和数据的统计处理，通过提供给剂量计终端站和中央控制站的处理器的操作，。构成：将来自剂量计终端站23的来自检测器1的脉冲7输出到对数剂量率计10，其输出剂量率信号40被发送到模拟信号处理部分22.处理部分22存储剂量率数据以存储器18中的数字信号的形式。发送控制部分19根据来自中央控制站31的请求向处理器20发送中断信号，并将最新的剂量率发送到站31。站31将剂量率值存储在存储器25中并执行显示和记录，并且处理器26计算每个辐射气氛中的积分剂量以在特定时段内平均剂量。

6. 发明专利

JPS53120117A EXCITATION CONTROL SYSTEM FOR GENERATOR 失效
公开(公告)号：JPS53120117A
公开(公告)日：1978-10-20
申请号：JP3450077
申请日：1977-03-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AOTSU HIROAKI , ISONO AKIRA , GOTOU MASUO , KIMURA KOUICHI , MOMOCHI YASUSHI , KAI TAKAAKI , KITAMURA SATORU , KAIHARA AKIHISA , OKADA HIROSHI
IPC分类号： H02J3/50 , H02P9/10 , H02P9/14 , H02P9/30
摘要： PURPOSE:To provide for multiple functions and also permit size reduction by permitting each function other than those in a generator terminal voltage control section to be taken up as a function of the active and reactive generator output terminal powder for calculation in scalar quantities.

7. 发明专利

JPS58223776A Radiation monitoring device 失效
标题翻译：辐射监测装置
公开(公告)号：JPS58223776A
公开(公告)日：1983-12-26
申请号：JP10680382
申请日：1982-06-23
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： FUJIWARA HIROSHI , YAMAZAKI TAKAAKI , MIZUNO TAKEHIRO , KAI TAKAAKI
IPC分类号： G01T1/16 , G01T1/17 , G08C15/06 , G08C19/00
CPC分类号： G01T1/17
摘要： PURPOSE:To improve measurement precision and stability and improve a monitoring function, and to reduce the cost of cables, by measuring a radiation level digitally at a radiation measuring terminal station and transmitting the measurement result to a central monitor station in the form of a digital signal. CONSTITUTION:A dose in a radiation atmosphere is detected by a radiation detector 1 at the radiation measuring terminal station 31 and detection pulse are measured by a processing part 33 for a specific time to send the result to a processor 32. The processor 32 converts the counted value into a dose rate, which is stored in a memory 36. A transmission control part 35 sends an up-to- date dose rate to the central monitor station 41, which stores the input value in a memory 57 and displays and records it; and a processor 56 calculates an integral dose in every radiation atmosphere and an average value of the dose rate within a specific time.
摘要翻译：目的：通过在辐射测量终端站以数字方式测量辐射水平，并将测量结果以数字形式传输到中央监测站，提高测量精度和稳定性，改善监测功能，降低电缆成本信号。构成：辐射检测器1在辐射测量终端站31处检测辐射环境中的剂量，检测脉冲由处理部分33测量一段特定时间，以将结果发送到处理器32.处理器32将将计数值计入存储在存储器36中的剂量率。传输控制部分35向中央监控站41发送最新的剂量率，其将输入值存储在存储器57中并显示和记录它 ; 并且处理器56计算每个辐射气氛中的积分剂量和在特定时间内的剂量率的平均值。

8. 发明专利

CA1090417A EXCITATION CONTROL APPARATUS SUITED FOR NORMAL STOP OPERATION OF SYNCHRONOUS GENERATORS 未知
公开(公告)号：CA1090417A
公开(公告)日：1980-11-25
申请号：CA280498
申请日：1977-06-14
申请人： HITACHI LTD
发明人： GOTO MASUO , ISONO AKIRA , MOMOCHI YASUSHI , KAI TAKAAKI
IPC分类号： H02P9/08 , H02P3/06
摘要： EXCITATION CONTROL APPARATUS SUITED FOR NORMAL STOP OPERATION OF SYNCHRONOUS GENERATORS Disclosed is an apparatus for carrying out normal stop of a synchronous generator in an advantageous manner without use of a field breaker. The apparatus comprises a six-phase thyristor converter for controlling field excitation of the synchronous generator in dependence upon terminal voltage thereof, which converter exhibits not only a forward conversion function (power rectifier) but also backward conversion function (power inverter). When a generator operation stop command is produced, the operation of the converter in power rectifier mode is changed over to power inverter mode. During the inverter mode operation, when the terminal voltage of the synchronous generator becomes lower than a preset value, a pair of counter part thyristors among the thyristors constituting the converter are simultaneously fired to bring about a short-circuited state in the excitation circuit with all the firing pulses supplied to the other thyristors being suppressed, thereby to complete the stopping operation for the synchronous generator.

9. 发明专利

JPS5350415A EXCITATION CONTROL SYSTEM FOR SYNCHRONOUS MOTOR 失效
公开(公告)号：JPS5350415A
公开(公告)日：1978-05-08
申请号：JP12464076
申请日：1976-10-18
申请人： HITACHI LTD
发明人： KITAMURA SATORU , KAI TAKAAKI , KAIHARA AKIHISA , GOTOU MASUO
IPC分类号： H02P9/30
摘要： PURPOSE:To permit excitation control with less interphase fluctuations of gate pulse for main thyristor by making the required quantity of compensation a signal with less ripple by separately providing a three-phase full-wave rectification circuit for voltage detection and an impedance compensation circuit for the system.

10. 发明专利

JPS52154011A EXCITATION CONTROLLER FOR SYNCHRONOUS MACHINE 失效
公开(公告)号：JPS52154011A
公开(公告)日：1977-12-21
申请号：JP7119176
申请日：1976-06-18
申请人： HITACHI LTD
发明人： GOTOU MASUO , ISONO AKIRA , MOMOCHI YASUSHI , KAI TAKAAKI
IPC分类号： H02P9/08
摘要： PURPOSE:To cause a current made not flowing in the rectifier transformer, by making in conduction the positive and negative pole sides of a certain phase of the thyristor to derive a by-pass status, when a terminal voltage of the generator comes down below the previously set value, during an inverter operation of the thyristor.

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