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1. 发明专利

JPS59186404A Demodulating circuit 失效
标题翻译：解调电路
公开(公告)号：JPS59186404A
公开(公告)日：1984-10-23
申请号：JP6084083
申请日：1983-04-08
申请人： Hitachi Denshi Ltd , Hitachi Ltd
发明人： UMEMOTO MASUO , MICHIKAWA YUUICHI , TANAKA SEIJI
IPC分类号： H04N5/93 , H03D3/00 , H03D3/04
CPC分类号： H03D3/04
摘要： PURPOSE:To eliminate the influence of time errors in the rising and falling of a limiter output and to realize a demodulation system suitable for a carrier of high frequency by providing pulse generating circuit individually; for the rising and falling of the output of a limiter circuit and adjusting the phase of generated pulses. CONSTITUTION:An inverted output J and an uninverted output K are obtained from an input signal I. Buffer amplifiers 12 and 13 serve as a delay circuit and an inverting circuit and AND circuits 14 and 15 generate pulses N and O having constant pulse widths corresponding to the rising and falling of a modulated signal from input signals J and L, and K and M. Comparators 16 and 17 correct variances of rising and falling characteristics of the input signal I, characteristics of the AND circuits N and O, and characteristics between inverted and uninverted outputs of the buffer amplifiers 12 and 13; the comparator 16 is set to a fixed threshold level and the comparator 17 is set to a variable threshold level. The output of the comparators 16 and 17 are ORed by an OR circuit 18 to obtain a demodulated signal through an LPF19.
摘要翻译：目的：消除限幅器输出上升和下降时间误差的影响，并通过单独提供脉冲发生电路实现适用于高频载波的解调系统; 用于限制电路的输出的上升和下降，并调整产生的脉冲的相位。构成：从输入信号I获得反相输出J和未反相输出K.缓冲放大器12和13用作延迟电路和反相电路，AND电路14和15产生具有对应于来自输入信号J和L以及K和M的调制信号的上升和下降。比较器16和17校正输入信号I的上升和下降特性的变化，AND电路N和O的特性，以及反相和缓冲放大器12和13的未反相输出; 将比较器16设定为固定的阈值电平，将比较器17设定为可变阈值电平。比较器16和17的输出由或电路18进行或运算，以通过LPF19获得解调信号。

2. 发明专利

JPS5937789A High-definition television system 失效
标题翻译：高分辨率电视系统
公开(公告)号：JPS5937789A
公开(公告)日：1984-03-01
申请号：JP14753382
申请日：1982-08-27
申请人： Hitachi Denshi Ltd , Hitachi Ltd
发明人： UMEMOTO MASUO , ACHIHA MASAHIKO , NAGAHARA SHIYUUSAKU , TANAKA SEIJI
IPC分类号： H04N7/015 , H04N3/27 , H04N11/20
CPC分类号： H04N3/27
摘要： PURPOSE:To obtain relevance to the present TV system with easy conversion by selecting a horizontal scanning frequency so that an odd multiple of its specified value is equal to an integer multipled of the horizontal scanning frequency of the present TV system. CONSTITUTION:An original oscillator 1 oscillates at 86MHz. Its output is frequency-divided by 2 through a frequency divider 2 and further frequency-divided by 12 through a frequency divider 3 to obtain a 43 and 3.58MHz output. The 43MHz output is used as a sampling frequency used for encoding the output of a high-definition TV camera, VTR, etc. The 3.58MHz output is used to drive the camera of the present TV system, VTR, etc., synchronously with the high-definition TV system. The output of the oscillator 1 is frequency-divided by 2553 through a frequency divider 4 and further frequency-divided by 2 through a frequency divider 6 to generate a horizontal driving signal HD of the horizontal scanning frequency. The output of the frequency divider 4 is frequency-divided by 1125 through a frequency divider 5 corresponding to the number of scanning lines, i.e. 1125 to generate a vertical driving signal VD.
摘要翻译：目的：通过选择水平扫描频率，使得其指定值的奇数倍等于当前TV系统的水平扫描频率的整数，来获得与本TV系统的相关性。构成：原始振荡器1以86MHz振荡。其输出通过分频器2分频2，并通过分频器3进一步分频12，以获得43和3.58MHz的输出。 43MHz输出用作用于对高分辨率电视摄像机VTR等的输出进行编码的采样频率。3.58MHz输出用于与当前电视系统，VTR等相机同步驱动高清电视系统。振荡器1的输出通过分频器4被分频2553，并通过分频器6进一步分频2，以产生水平扫描频率的水平驱动信号HD。分频器4的输出通过与扫描线数量相对应的分频器5被分频1125，即1125以产生垂直驱动信号VD。

3. 发明专利

CA2433058C HAZARDOUS MATERIAL DETECTION SYSTEM 未知
公开(公告)号：CA2433058C
公开(公告)日：2007-07-24
申请号：CA2433058
申请日：2003-06-20
申请人： HITACHI LTD
发明人： NAKASHIGE KEIKO , TANAKA SEIJI , FUJITA HIROYUKI , NISHIKAWA YOSHIHIRO , IWASAKI TOSHIO
IPC分类号： G01N27/62 , H01J49/04 , G01N1/02 , G01N27/68 , G08B21/00
摘要： A hazardous material detection system that can suppress occurrence of contamination due to ionization. When a sensor detects that a test sample has entered an inspection region of an X-ray inspect ion device as a belt conveyor moves, a corona discharge power supply in a hazardous material detection device is turned on for a constant time, to introduce a gaseous sample containing a substance stuck to the test sample into the hazardous material detection device via a sucking section and gaseous sample introduction piping, in order to ionize the gaseous sample and analyze it at an analyzer, based on a result of which analysis, a data processor decides whether the gaseous sample contains a hazardous material, to display a decision result on a screen. When the test sample is detected by an exit side sensor, the corona discharge power supply is turned off.

4. 发明专利

DE69323384D1 未知
公开(公告)号：DE69323384D1
公开(公告)日：1999-03-18
申请号：DE69323384
申请日：1993-10-15
申请人： HITACHI LTD
发明人： OKAMOTO TEIJI , TANAKA SEIJI , IMANISHI SHINYA , TANAKA TORU , SHINAGAWA TETSUO , WATANABE YUMIKO
IPC分类号： H04M1/725 , H04M11/06 , H04N1/00 , H04N1/327 , H04N1/32
摘要： A facsimile system with the body thereof usable as a subunit of a cordless telephone is disclosed. A parent unit (502) is connected to the telephone line. A facsimile subunit (508) is connected by radio to the parent unit. A telephone subunit (504) is also connected by radio to the parent unit. A circuit (11) included in the parent unit detects a signal indicating that the other party is in facsimile transmission mode. When a call signal is detected from the telephone line, the parent unit connects the line. When a CNG signal is detected, on the other hand, the parent unit connects the facsimile subunit by radio. In the case where a CNG signal is not detected, the parent unit starts the ring-up tone on the telephone subunit. An AGC circuit (1101) and a voice mute circuit (1701) are included in the parent unit.

5. 发明专利

DE69415189D1 未知
公开(公告)号：DE69415189D1
公开(公告)日：1999-01-28
申请号：DE69415189
申请日：1994-02-24
申请人： HITACHI LTD
发明人： TANAKA TORU , HONDA TOYOTA , OKAMOTO TEIJI , TANAKA SEIJI
IPC分类号： H04M11/08 , H04N1/00 , H04M11/06 , H04N7/14 , H04N1/32 , H04L1/12
摘要： A voice/image simultaneous communication apparatus which can transmit image data while permitting talking with higher efficiency by encoding voice and synthesizing voice coded data and image data than by multiplexing frequencies. The voice/image simultaneous communication apparatus is constructed of a voice coder (16) for coding an analog voice signal, a voice decoder (17) for decoding the coded voice into an analog voice signal, a data synthesizer (7) for synthesizing image coded data and voice coded data, a data separator (8) for separating synthesized coded data into image coded data and voice coded data, and a modem (9) capable of performing full duplex communication. The data synthesizer (7) can change the ratio of synthesis between voice coded data and image coded data in accordance with the data transmission speed.

6. 发明专利

CA2433058A1 HAZARDOUS MATERIAL DETECTION SYSTEM 未知
公开(公告)号：CA2433058A1
公开(公告)日：2003-12-24
申请号：CA2433058
申请日：2003-06-20
申请人： HITACHI LTD
发明人： FUJITA HIROYUKI , IWASAKI TOSHIO , NISHIKAWA YOSHIHIRO , TANAKA SEIJI , NAKASHIGE KEIKO
IPC分类号： G01N27/62 , G01N1/02 , G01N27/68 , G08B21/00 , H01J49/04 , G01N1/22
摘要： A hazardous material detection system that can suppress occurrence of contamination due to ionization. When a sensor detects that a test sample has entered an inspection region of an X-ray inspect ion device as a belt conveyor moves, a corona discharge power supply in a hazardous material detection device is turned on for a constant time, to introduce a gaseous sample containing a substance stuck to the test sample into the hazardous material detection device via a sucking section and gaseous sample introduction piping, in order to ionize the gaseous sample and analyze it at an analyzer, based on a result of which analysis, a data processor decides whether the gaseous sample contains a hazardous material, to display a decision result on a screen. When the test sample is detected by an exit side sensor, the corona discharge power supply is turned off.

7. 发明专利

CA2414754A1 APPARATUS FOR INSPECTING THE INSIDE OF A CONTAINER AND METHOD OF INSPECTING THE SAME 未知
公开(公告)号：CA2414754A1
公开(公告)日：2003-06-19
申请号：CA2414754
申请日：2002-12-19
申请人： HITACHI LTD
发明人： TANAKA SEIJI , NAKASHIGE KEIKO , TAKADA YASUAKI , TSUTSUMI HIROFUMI
IPC分类号： G01V5/00 , G01N1/22 , G01N1/24 , G01N27/62 , G01N33/00 , G01N33/22 , G01N33/497 , G01V9/00 , G01V11/00 , G01N5/00 , G01N23/22
摘要： An apparatus and method for inspecting the inside of a container that can easily detect a stowaway being in hiding in the container. The apparatus for inspecting an inside of a container includes a sampling probe arranged at an appropriate position inside the container for sampling an atmospheric gas therein, a mass spectrometer for detecting the atmospheric gas sampled by the sampling probe as a molecular weight by ionizing the atmospheric gas, and a control processing part for comparing the information detected by the mass spectrometer with a pre-registered index molecular weight to judge whether or not an abnormality exists.

8. 发明专利

DE69323384T2 未知
公开(公告)号：DE69323384T2
公开(公告)日：1999-09-09
申请号：DE69323384
申请日：1993-10-15
申请人： HITACHI LTD
发明人： OKAMOTO TEIJI , TANAKA SEIJI , IMANISHI SHINYA , TANAKA TORU , SHINAGAWA TETSUO , WATANABE YUMIKO
IPC分类号： H04M1/725 , H04M11/06 , H04N1/00 , H04N1/327 , H04N1/32
摘要： A facsimile system with the body thereof usable as a subunit of a cordless telephone is disclosed. A parent unit (502) is connected to the telephone line. A facsimile subunit (508) is connected by radio to the parent unit. A telephone subunit (504) is also connected by radio to the parent unit. A circuit (11) included in the parent unit detects a signal indicating that the other party is in facsimile transmission mode. When a call signal is detected from the telephone line, the parent unit connects the line. When a CNG signal is detected, on the other hand, the parent unit connects the facsimile subunit by radio. In the case where a CNG signal is not detected, the parent unit starts the ring-up tone on the telephone subunit. An AGC circuit (1101) and a voice mute circuit (1701) are included in the parent unit.

9. 发明专利

DE69415189T2 未知
公开(公告)号：DE69415189T2
公开(公告)日：1999-08-12
申请号：DE69415189
申请日：1994-02-24
申请人： HITACHI LTD
发明人： TANAKA TORU , HONDA TOYOTA , OKAMOTO TEIJI , TANAKA SEIJI
IPC分类号： H04M11/08 , H04N1/00 , H04M11/06 , H04N7/14 , H04N1/32 , H04L1/12
摘要： A voice/image simultaneous communication apparatus which can transmit image data while permitting talking with higher efficiency by encoding voice and synthesizing voice coded data and image data than by multiplexing frequencies. The voice/image simultaneous communication apparatus is constructed of a voice coder (16) for coding an analog voice signal, a voice decoder (17) for decoding the coded voice into an analog voice signal, a data synthesizer (7) for synthesizing image coded data and voice coded data, a data separator (8) for separating synthesized coded data into image coded data and voice coded data, and a modem (9) capable of performing full duplex communication. The data synthesizer (7) can change the ratio of synthesis between voice coded data and image coded data in accordance with the data transmission speed.

10. 发明专利

JP2011050167A Secondary excitation-type power generation system 有权
标题翻译：二次发电型发电系统
公开(公告)号：JP2011050167A
公开(公告)日：2011-03-10
申请号：JP2009196217
申请日：2009-08-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MEGURO HIKARI , SAKAI HIROMITSU , TANAKA SEIJI , YAMASHITA KOJIRO , MIYAGAWA RYOHEI
IPC分类号： H02P9/00 , H02P9/04 , H02P25/32
摘要： PROBLEM TO BE SOLVED: To make a secondary excitation-type power generation system generate power by turning off a thyristor by a certain method even after the thyristor is turned on by solving a problem that, while there is employed a crowbar circuit for protecting a converter connected to a secondary excitation-type generator, the thyristor is mainly used for the crowbar circuit, and when the thyristor is turned on, the thyristor is continued to be turned on by an effect that a voltage is excited to a coil of a rotor when the rotor of the secondary excitation-type generator is rotated, and power cannot be generated due to a short-circuit of a coil at the side of the rotor of the secondary excitation-type generator unless the thyristor is turned off. SOLUTION: The thyristor is turned off by lowering a current flowing in the thyristor of the crowbar circuit to a holding current of the thyristor or lower, and thus, the secondary excitation-type power generation system can generate power. In order to lower the current flowing in the thyristor of the crowbar circuit to the holding current or lower, there is arranged a stopping/short-circuiting circuit or a separation circuit of the rotor of the secondary excitation-type generator. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：即使在晶闸管接通之后，通过一定的方法关闭晶闸管来产生二次励磁型发电系统，通过解决一个问题，即使用用于保护与次级励磁型发电机连接的转换器，晶闸管主要用于短路电路，当晶闸管导通时，晶闸管继续导通，电压被激励为线圈当次级励磁型发电机的转子旋转时，转子，并且由于次级励磁型发电机的转子侧的线圈短路而不能产生电力，除非晶闸管截止。解决方案：通过将在短路电路的晶闸管中流过的电流降低到可控硅的保持电流以下，使晶闸管截止，从而二次励磁型发电系统能够发电。为了将在短路电路的晶闸管中流动的电流降低到保持电流以下，设置有次级励磁式发电机的转子的停止/短路电路或分离回路。版权所有（C）2011，JPO＆INPIT

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