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11. 发明专利

JPS5927235A Apparatus for detecting water leakage 失效
标题翻译：检测水泄漏的装置
公开(公告)号：JPS5927235A
公开(公告)日：1984-02-13
申请号：JP13732482
申请日：1982-08-09
申请人： Hitachi Ltd
发明人： ISHIDA TAKAYUKI , MAE YOSHINORI
IPC分类号： G01M3/16 , G01M3/04 , G01M3/22 , G21C17/02 , G21C17/025
CPC分类号： G01M3/228
摘要： PURPOSE:To detect water leakage at an early stage in high reliability, by deciding the presence of water leakage by calculating whether the total number of times of the change ratio in hydrogen concn. exceeding a set change ratio are a set ratio or more. CONSTITUTION:The output 14 of hydrogen concn. due to reaction of metal Na and water calculated by a vacuum meter is taken n-times at a constant cycle within a predetermined time DELTAT by a hydrogen concn. calculation circuit 18 and the average concn. C1-Cn during the time DELTAT. The change ratio C1-Cn of the hydrogen concn. at a predetermined time interval aDELTAT by a hydrogen concn. change ratio calculation circuit 19. A water leakage decision circuit 20 decides whether the hydrogen conc. change ratio C1-Cn exceeds a set change ratio or not and the water leakage is decided by calculating whether the total number of times exceeding the set change ratio within a predetermined time are a set ratio or more. By this method, water leakage is detected at an early stage in high reliability.
摘要翻译：目的：通过计算氢浓度变化率的总次数，确定高可靠性的早期漏水情况。超过设定的变化率是设定的比例以上。构成：氢气输出14 由于真空计算出的金属Na与水的反应在氢气浓度的预定时间DELTAT内以恒定的循环进行n次。计算电路18和平均浓度 C1-Cn在DELTAT期间。氢浓度的变化率C1-Cn 在预定的时间间隔aDELTAT由氢浓度变流比计算电路19。漏水判定电路20判定氢浓度变化率C1-Cn超过设定的变化率，并且通过计算在预定时间内超过设定变化率的总次数是否为设定的比例以上来决定漏水。通过这种方法，在高可靠性的早期阶段检测到漏水。

12. 发明专利

JPS57179688A METHOD OF CONTROLLING PLASMA DISCHARGE IN NUCLEAR FUSION DEVICE 失效
公开(公告)号：JPS57179688A
公开(公告)日：1982-11-05
申请号：JP6416881
申请日：1981-04-30
申请人： JAPAN ATOMIC ENERGY RES INST , HITACHI LTD
发明人： KAWASAKI KOUZOU , ISHIDA TAKAYUKI , TAKEMARU KOUICHI , KAWASAKI TAKEHIDE
IPC分类号： G21B1/11 , G21B1/00 , G21B1/25 , H05H1/12

13. 发明专利

JP2000121409A DEVICE AND METHOD FOR DIAGNOSING OBSTACLE OF PURGE TYPE INSTRUMENT 失效
公开(公告)号：JP2000121409A
公开(公告)日：2000-04-28
申请号：JP29087998
申请日：1998-10-13
申请人： HITACHI LTD
发明人： YAGI HIROYUKI , ISHIDA TAKAYUKI , NOGUCHI NAOKI
IPC分类号： G01F23/14 , G01L13/00 , G01M99/00 , G01M19/00
摘要： PROBLEM TO BE SOLVED: To provide a device and method for diagnosing the obstacle of a purge type instrument for quickly and efficiently diagnosing the obstacle of a purge tube based on a signal from a purge type instrument at the time of the normal operation of a plant. SOLUTION: Whether or not the diagnose of the obstacle of a purge type instrument 600 can be attained is judged based on the diagnostic period of the purge type instrument 600 to be used for a plant 100 and a plant state signal 502 by a diagnose validity/invalidity judging part 505 of an obstacle diagnostic device 500. When it is judged that the diagnose of the obstacle of the purge type instrument 600 can be attained, a differential pressure signal 503 detected by a differential pressure gauge 105 of the purge type instrument 600 is fetched by an obstacle diagnostic part 507, and the diagnose of the obstacle of a purge tube 104 of the purge type instrument 600 is operated based on the fetched differential pressure signal 503.

14. 发明专利

JPH09196800A METHOD AND APPARATUS FOR ACOUSTICALLY DETECTING LEAKAGE 失效
公开(公告)号：JPH09196800A
公开(公告)日：1997-07-31
申请号：JP414396
申请日：1996-01-12
申请人： HITACHI LTD
发明人： OKADA SATOSHI , YAMADA IZUMI , KASHIWAKURA JUN , ISHIDA TAKAYUKI
IPC分类号： G01M3/24
摘要： PROBLEM TO BE SOLVED: To make it possible to standardize minute leakage detection and accurate leakage position even when the sound wave propagation characteristics of medium are irregular. SOLUTION: The sound wave propagation characteristic distribution in a monitoring area previously set by a sound wave propagation characteristic distribution calculator 12 is measured from the detection signals of a plurality of acoustic transducers 9a to 9d disposed at the periphery of the monitoring area. The signals of the transducers 9a to 9d are time and amplitude corrected by a sound source strength distribution calculator 13 by using the measured distribution. The sound source strength distribution of the area is estimated from the time and amplitude corrected detection signals. These three steps are repeated to update the characteristic distribution and strength distribution, and the presence or absence of leakage is detected by comparing the updated strength distribution and the strength distribution at the time of no leakage by a leakage detector 18.

15. 发明专利

JPH0436356B2 失效
公开(公告)号：JPH0436356B2
公开(公告)日：1992-06-15
申请号：JP18290782
申请日：1982-10-20
申请人： HITACHI LTD
发明人： ASANO TAMOTSU , ISHIDA TAKAYUKI , IWASAKI TOSHIO
IPC分类号： G21C7/08 , G21D3/04

16. 发明专利

JPS63180891A CONTROL-ROD POSITION DISPLAY METHOD OF NUCLEAR REACTOR 失效
公开(公告)号：JPS63180891A
公开(公告)日：1988-07-25
申请号：JP1239287
申请日：1987-01-23
申请人： HITACHI LTD
发明人： SUZUKI TOSHIYUKI , ISHIDA TAKAYUKI
IPC分类号： G21C17/10

17. 发明专利

JPH07243886A EDDY CURRENT TYPE ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPH07243886A
公开(公告)日：1995-09-19
申请号：JP3555594
申请日：1994-03-07
申请人： HITACHI LTD
发明人： GOTO TADASHI , IKEDA TAKASHI , UWABE SATORU , ISHIDA TAKAYUKI
IPC分类号： G01F1/58
摘要： PURPOSE:To provide a smaller highly sensitive and highly accurate eddy current type electromagnetic flowmeter. CONSTITUTION:A cylindrical external magnetic pole 14 made of a magnetic material concurrently serving as a rectifier tube is provided on the outer circumference of a coil assembly in a range covered by a magnetic field and a circular passage 16 is formed between the magnetic pole and the coil assembly. The magnetic resistance of a magnetic circuit is reduced to form a magnetic field between an internal magnetic pole and the external magnetic pole 14 so that the magnetic field in the direction of radiation at the end part of a magnetic pole increases as effective right angle component in the detection of a flow velocity. This enables increase in the flux density of a space thereby allowing miniaturization with remarkable improvement in detection sensifivity. This also improves the S/N ratio of a detection signal.

18. 发明专利

JPS61277020A SODIUM LIQUID-LEVEL METER 失效
公开(公告)号：JPS61277020A
公开(公告)日：1986-12-08
申请号：JP11880385
申请日：1985-06-03
申请人： HITACHI LTD
发明人： TAKAHASHI HITOSHI , ISHIDA TAKAYUKI , AMADA TATSUO , NAKAO NOBORU , OGAWA KINYA
IPC分类号： G01F23/00 , G01F23/26
摘要： PURPOSE:To reduce the space necessary for the feeding-out and feeding-in of a liquid-level meter at the time of the maintenance of said liquid-level meter, by dividing the bobbin, coil and protective pipe constituting a liquid level measuring part into plural parts and connecting said parts by flexible joints each having a shape securing the path communicating inert gas sealed in the passage of the coil and the protective pipe. CONSTITUTION:A bobbin 1, a coil 2 and a protective pipe 3 are divided into plural parts which are, in turn, connected by joints 15. Because each joint 15 takes out the induced voltage signal generated by the coil of each part and the mutual action of liquid levels, it is necessary to connect the coils of the divided parts to each other. Then, it is necessary to secure the passage therefor and to bend the same at the times of feeding-in and feeding-out. Because of this, each joint 15 is formed into a structure having flexibility.

19. 发明专利

JPS5835470A DIAGNOSING DEVICE FOR ABNORMALITY 失效
公开(公告)号：JPS5835470A
公开(公告)日：1983-03-02
申请号：JP13396581
申请日：1981-08-28
申请人： HITACHI LTD
发明人： ISHIDA TAKAYUKI
IPC分类号： G01R19/00 , G06F11/22
摘要： PURPOSE:To diagnose an abnormality accurately and smoothly by making an abnormal state held temporarily and by deciding the abnormality in accordance with the results of searches on the lower side. CONSTITUTION:By the observation of an abnormal phenomenon 9-b, the possibility of abnormal phenomena 9-d and 9-e is found through logic processing 11-b. While these phenomena 9-d and 9-e are held, phenomena on the lower side are further observed in the same way through logic processings 11-c and 11-d on the lower side. Observations on the lower side are conducted seqnentially in the same way, and based thereon, an abnormality is decided. By this constitution, the faulty exclusion of abnormal phenomena and routes is eliminated, and thus an accurate and smooth diagnosis of the abnormality is performed.

20. 发明专利

JPS5812012A OPERATION GUIDANCE SYSTEM 失效
公开(公告)号：JPS5812012A
公开(公告)日：1983-01-24
申请号：JP10937581
申请日：1981-07-15
申请人： HITACHI LTD
发明人： IWASAKI TOSHIO , ISHIDA TAKAYUKI
IPC分类号： G05B23/02 , G06F17/40 , G09G5/00 , G09G5/32
摘要： PURPOSE:To smoothly operate a plant which is complicated and has much information to be monitored, by simultaneously displaying three sets of display information on a screen of a cathode ray tube. CONSTITUTION:A device 8 deciding and displaying break points and a device 9 deciding and displaying operating items and states to be executed by the operators at the break points are provided in a process computer 12. Further, a device 10 processing and displaying plant information to be monitored at the break points is provided. The respective information is displayed on corresponding parts 5, 6 and 7 of a CRT display section.

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