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1. 发明专利

JP2009044857A Apparatus and method for diagnosing stability of electric power system 有权
标题翻译：用于诊断电力系统稳定性的装置和方法
公开(公告)号：JP2009044857A
公开(公告)日：2009-02-26
申请号：JP2007206863
申请日：2007-08-08
申请人： Hitachi Ltd , Tohoku Electric Power Co Inc , 東北電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , FUKUI CHIHIRO , MADORI IWAO , MAKINO JUNICHI , HANAMOTO KONOSUKE , KATAYAMA TAKASHI , TAKAHASHI CHIYOUEI , SHIRASAKI TAKASHI
IPC分类号： H02J3/00 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To detect a dominant characteristic value corresponding to a system characteristic oscillation mode. SOLUTION: A power system stability diagnosis apparatus 12 extracts a dominant characteristic value from time-series observational data as follows: it computes a dominant mode power spectrum and a low-frequency noise range spectrum by a frequency component analyzing means 2; it computes the amount of a low-frequency noise component relative to a dominant mode component by a low-frequency noise amount determining means 3; it applies an autoregressive model and computes a characteristic value of each order by a characteristic value analyzing means 4; it screens them by a frequency screening means 5; and it changes and applies a dominant mode extraction technique according to the amount of the low-frequency noise component determined by the low-frequency noise amount determining means 3 and extracts the dominant characteristic value from among the multiple remaining characteristic values. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：检测与系统特性振荡模式对应的主要特性值。解决方案：电力系统稳定性诊断装置12从时间序列观测数据中提取主要特征值如下：其通过频率分量分析装置2计算主模式功率谱和低频噪声范围谱; 它通过低频噪声量确定装置3计算相对于主模式分量的低频噪声分量的量; 它应用自回归模型，并通过特征值分析装置4计算每个顺序的特征值; 它通过频率筛选装置5屏蔽它们; 并且根据由低频噪声量确定装置3确定的低频噪声分量的量改变并应用主模式提取技术，并从多个剩余特征值中提取主要特性值。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2006101619A Power system stability diagnosis device, power system stabilizer, and power system contraction support device 有权
标题翻译：电力系统稳定性诊断装置，电力系统稳定器和电力系统承包支援装置
公开(公告)号：JP2006101619A
公开(公告)日：2006-04-13
申请号：JP2004283535
申请日：2004-09-29
申请人： Hitachi Ltd , Tohoku Electric Power Co Inc , 東北電力株式会社 , 株式会社日立製作所
发明人： SEKOGUCHI MASAHIRO , HARADA YASUSHI , MADORI IWAO , KATAYAMA TAKASHI , WAYAMA WATARU , TAMURA MITSUNARI , NIHEI ATSUSHI
IPC分类号： H02J3/00 , H02J3/24
摘要： PROBLEM TO BE SOLVED: To detect a dominant characteristic value having a system characteristic oscillation mode. SOLUTION: This power system stability diagnosis device 10 operates a characteristic value of each order by using a characteristic value analysis means 3 by applying an autoregressive model with respect to time series measurement data, performs screening to the operated characteristic value by a frequency screening means 4, and extracts the dominant characteristic value from a plurality of the remaining characteristic values by applying a dominant mode extraction method. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：检测具有系统特性振荡模式的主要特性值。解决方案：该电力系统稳定性诊断装置10通过使用特征值分析装置3对相对于时间序列测量数据应用自回归模型来操作各阶的特征值，对所操作的特征值进行频率的筛选筛选装置4，并且通过应用主模式提取方法从多个剩余特征值中提取主要特征值。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

DE69935070T2 未知
公开(公告)号：DE69935070T2
公开(公告)日：2007-05-31
申请号：DE69935070
申请日：1999-03-25
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI , NAKAHARA HIROYUKI , OTSUKA AKIRA , KUNII YASUHIKO , KUROGI SHIGETO
IPC分类号： H01J11/12 , H01J11/22 , H01J11/24 , H01J11/26 , H01J11/34 , H01J11/36 , H01J11/44 , H01J17/49 , H01J29/02
摘要： In a display panel, the luminance and contrast are improved by making a partition semitransparent, which is a constituent element adjacent to a light-emitting section. A visible light incident on the partition proceeds inside the partition while being attenuated at a constant rate. When an external light incident on the partition from the front side is reflected off the bottom surface of the partition and returns to the front side again, the external light reciprocates inside the partition. Since the external light is largely attenuated by the reciprocation, the partition seemingly functions as an optical absorber with respect to the external light. A light emitted by the light-emitting section can transmit through the partition and radiate to the outside from the front side.

4. 发明专利

DE69931572D1 未知
公开(公告)号：DE69931572D1
公开(公告)日：2006-07-06
申请号：DE69931572
申请日：1999-03-12
申请人： HITACHI LTD
发明人： KUROGI SEIKI , UKAI YOSHITAKA , YOSHIDA KENJI , KATAYAMA TAKASHI , NAKAHARA HIROYUKI
IPC分类号： G09G3/20 , G09G3/288 , G09G3/291 , G09G3/296 , G09G3/298 , H01J11/12 , H01J11/14 , H01J11/22 , H01J11/24 , H01J11/26 , H01J11/32 , H01J11/34 , H01J17/04 , H01J17/49
摘要： A plasma display panel includes a plurality of row electrodes (42) defining rows of a screen. The row electrodes are arranged at intervals so that adjacent row electrodes are capable of serving as an electrode pair for generating a surface discharge. Each of the row electrodes includes three or more belt-shaped conductors (41) extending along the full length of the screen in a direction of the rows and a plurality of connections each extending in column direction for electrically connecting the belt-shaped conductors to one other.

5. 发明专利

DE69935070D1 未知
公开(公告)号：DE69935070D1
公开(公告)日：2007-03-22
申请号：DE69935070
申请日：1999-03-25
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI , NAKAHARA HIROYUKI , OTSUKA AKIRA , KUNII YASUHIKO , KUROGI SHIGETO
IPC分类号： H01J11/12 , H01J11/22 , H01J11/24 , H01J11/26 , H01J11/34 , H01J11/36 , H01J11/44 , H01J17/49 , H01J29/02
摘要： In a display panel, the luminance and contrast are improved by making a partition semitransparent, which is a constituent element adjacent to a light-emitting section. A visible light incident on the partition proceeds inside the partition while being attenuated at a constant rate. When an external light incident on the partition from the front side is reflected off the bottom surface of the partition and returns to the front side again, the external light reciprocates inside the partition. Since the external light is largely attenuated by the reciprocation, the partition seemingly functions as an optical absorber with respect to the external light. A light emitted by the light-emitting section can transmit through the partition and radiate to the outside from the front side.

6. 发明专利

JPS6468679A AZIMUTH ANALYZING DEVICE 失效
公开(公告)号：JPS6468679A
公开(公告)日：1989-03-14
申请号：JP22526287
申请日：1987-09-10
申请人： HITACHI LTD
发明人： FUKAMI AKIHISA , KATAYAMA TAKASHI
IPC分类号： G01S7/523 , G01S7/52
摘要： PURPOSE:To enable a high-resolution azimuth analysis by using a maximum entropy (MEM) method under inferior signal-to-noise ratio conditions by filtering a signal on a time space basis by two-dimensional Fourier transform, and selecting a necessary frequency component and an azimuth component and performing inverse Fourier transform. CONSTITUTION:The received signal of a line array 1 is digitized by an input processing circuit 2 and a beat down circuit 3 extracts only a base band signal by digital filtering. Then a two-dimensional FFT circuit 4 performs the time spatial Fourier transform of the base band signal and a necessary frequency component and an azimuth component are selected through band/azimuth limiting circuits 5 and 6. Then the inverse Fourier transform is performed by a linear inverse FFT circuit 7 and an MEM processing circuit 8 calculates an autoregression coefficient which maximizes the entropy of input information to find signal power corresponding to each azimuth, thereby displaying the signal power on a display 9 as a two-dimensional graph. Consequently, even a target signal in noises can be analyzed with high resolution.

7. 发明专利

JPS6278620A TRACK BALL 失效
公开(公告)号：JPS6278620A
公开(公告)日：1987-04-10
申请号：JP21785485
申请日：1985-10-02
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI
IPC分类号： G06F3/033 , G06F3/038
摘要： PURPOSE:To attain such a minute operation as to move the position of a cursor just by one or two addresses by adding a switch, a pulse generator and an OR circuit. CONSTITUTION:A switch 5 is provided together with a pulse generating circuit 6 which produces pulses every time the switch 5 is pushed and an OR circuit 7 which secures an OR between the output signal G of the circuit 6 and the output signals E and F of a revolving direction detecting circuit 4 and delivers signals H. THese signals H are used as the count-up and count-down signals. Therefore, if a cursor is moved more by an address, the switch 5 is pushed once to carry out a count-up operation with the signal H obtained by superposing a pulse onto the signal E. In such a way, it is possible to attain such a minute operation as to move the cursor just by one or two addresses.

8. 发明专利

JPS586133B2 失效
公开(公告)号：JPS586133B2
公开(公告)日：1983-02-03
申请号：JP7446477
申请日：1977-06-24
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI , FUKAMI AKIHISA
IPC分类号： G01S3/80 , G01H3/08 , G01H17/00 , G01S3/803 , G01V1/00

9. 发明专利

JPS56129874A INCOMING BEARING MEASURING APPARATUS FOR ACOUSTIC SIGNAL 失效
公开(公告)号：JPS56129874A
公开(公告)日：1981-10-12
申请号：JP3344680
申请日：1980-03-18
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI
IPC分类号： G01S3/80 , G01S3/802 , G01S3/808
摘要： PURPOSE:To efficiently measure the incoming bearing of an acoustic signal with a hearing sound by employing a signal obtained from a plurality of microphones having a specified directivity set under the sea. CONSTITUTION:This measuring apparatus is equipped with a nondirectional microphone 1 arranged to face the incoming direction of an acoustic signal, microphones 2 and 3 having a 8-shaped directivity whose directivities are arranged to intersect each other, a resolver 7 in which the 2-phase winding on the side of the stator is excited by the output of the microphones 2 and 3, a circuit 8 adapted to perform computation for the output of the winding on the rotator side of the resolver 7 and a amplification circuit 9 for giving the computation output to a speaker 10. The rotating shaft of the resolver 7 rotates and when the hearing sound reaches a specified level, the incoming bearing of an acoustic signal is determined from the angle of rotation of the rotating shaft of the resolver 7.

10. 发明专利

JPS5585257A PHASE DIFFERENCE MEASURING CIRCUIT 失效
公开(公告)号：JPS5585257A
公开(公告)日：1980-06-27
申请号：JP15745778
申请日：1978-12-22
申请人： HITACHI LTD
发明人： KATAYAMA TAKASHI
IPC分类号： G01R25/08
摘要： PURPOSE:To accomplish a highly accurate measurement of phase difference by taking logical product of the signal A and the signal B within a frequency f, and when the signal is positive, counter is counted by the pulse of the frequency nf whose value is substracted from n/2. CONSTITUTION:Signals A and B are turned to a signal a through ''and'' with an and circuit 10. The signal B is multiplied by n to a signal b with a frequency mulitiplier 13. ''And'' of the signal a and b constitutes a clock of a counter 14. The signal A is applied to the counter 9. The number of the clock is counted by the counter 14 when the output c of the counter 9 is positive and memorized in a register 15. A data is transfered to a complementary counter 16 with the rise of the signal b and converted to the complement of 2. The data is provided to an adder 17. With the addition of the data and the binary of n/2, phase difference the signal A and B can be determined.

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