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21. 发明专利

JPS6212481B2 失效
公开(公告)号：JPS6212481B2
公开(公告)日：1987-03-19
申请号：JP608879
申请日：1979-01-24
申请人： HITACHI LTD
发明人： FUJITA HIROYUKI , MYAKE KYOHIDE , YANAGIMOTO MATSUO , TAKEISHI SEIICHI
IPC分类号： G02B6/28 , G02B27/10

22. 发明专利

JPS6243299A LINE SETTING SYSTEM 失效
公开(公告)号：JPS6243299A
公开(公告)日：1987-02-25
申请号：JP18179185
申请日：1985-08-21
申请人： HITACHI LTD
发明人： FUJITA HIROYUKI , SUGANO TADAYUKI , MIYANO YOSHIHIKO
IPC分类号： H04Q3/52
摘要： PURPOSE:To set lines of intra-office turn-back and transmission line turn-back without extending the delay time by constituting switches of a line setting part with the TST constitution and constituting T switches as double constitution. CONSTITUTION:Four T switches 1-2, 4-5, 6-7, and 9-10 are connected to S switches 3 and 8 in the TST constitution. Each of S switches 3 and 8 consists of 4X5 paths in the direction from the office to the transmission line (the direction of an arrow S) and consists of 4X5 paths in the direction from the transmission line to the office (the direction of an arrow R), and the fifth paths of S switches 3 and 8 are connected. In case of intra-office turn-back, the signal which passes the T switch 1-2 in the office side passes the fifth path of the S switch 3 and is inputted to the fifth path of the S switch 8 and is connected to the office side through the T switch 6-7. Thus, intra-office turn-back is possible easily with one stage of TST without extending the delay time.

23. 发明专利

JPS61102851A Signal transmission method 失效
标题翻译：信号传输方法
公开(公告)号：JPS61102851A
公开(公告)日：1986-05-21
申请号：JP22295284
申请日：1984-10-25
申请人： Hitachi Ltd
发明人： FUJITA HIROYUKI
IPC分类号： H04B14/04 , H04B17/00 , H04L25/49
CPC分类号： H04L25/4912
摘要： PURPOSE:To transmit an arrangement telephone number (OW)- a monitor num ber (SV) signal and simultaneously monitor a bit error rate pf a main signal by converting into and transmitting a code mark inversion (CMI) code and applying aviolation. CONSTITUTION:When an OW-SV signal is applied at a transmission side, this signal is given to a pulse number modulation circuit 2, and herein, when the OW-SV is 1, a continuous violation pulse V for 3 bits of a NAZ is produced and when the OW-SV is 0, 2 bit continuing violation pulse V is produced. A conversion circuit 1 converts the NRZ code of a main signal into a CMI code. In this conversion, only when the violation pulse is 1, an output breaking a regulation of the CMI code is given. In a receiving side, an input is done to a demodulation circuit 3, and herein, a NRZ data is separated from a violation signal. The violation signal thereof is demodulated into the OW-SV signal by a pulse number demodulation circuit 4. Then, during this demodulation, when only 1 bit of the violation signal V appears, this is considered to be generated by a bit error such as noises during a transmission and inputted to an error rate detecting circuit 5 and a bit error rate of the main signal is outputted.
摘要翻译：目的：传输安排电话号码（OW） - 监控号码（SV）信号，同时通过转换和发送代码标记反转（CMI）代码并应用程序来监控主信号的误码率。构成：当在发送侧应用OW-SV信号时，该信号被赋予脉冲数调制电路2，这里，当OW-SV为1时，NAZ的3位的连续违规脉冲V为当OW-SV为0时，产生2位继续冲突脉冲V. A转换电路1将主信号的NRZ码转换为CMI码。在此转换中，只有当违规脉冲为1时，才会给出断开CMI代码调节的输出。在接收侧，对解调电路3进行输入，这里NRZ数据与违规信号分离。其违规信号由脉冲数解调电路4解调成OW-SV信号。然后，在该解调期间，当只有1位的违规信号V出现时，这被认为是由诸如噪声之类的位错误产生的并且输入到错误率检测电路5并输出主信号的误码率。

24. 发明专利

JPS60195913A On-load tap changing transformer 失效
标题翻译：负载变更变压器
公开(公告)号：JPS60195913A
公开(公告)日：1985-10-04
申请号：JP5096584
申请日：1984-03-19
申请人： Hitachi Ltd
发明人： FUJITA HIROYUKI , FUKUDA TERUO
IPC分类号： H02H7/055 , H01F27/34 , H01F29/04
CPC分类号： H01F27/343 , H01F29/04
摘要： PURPOSE:To form a small size windings of a transformer which assures a high lightning impulse test voltage of low voltage terminal and a broad tapping range by providing an intermediate tap to a capacitor and connecting such tap to the intermediate tap of tap winding. CONSTITUTION:An intermediate tap is provided to a capacitor to be connected to a tap winding, two terminals A, C of capacitor are connected between the maximum taps of tap winding 3 and an intermediate tap B of capacitor is connected to the intermediate tap of tap winding 3. Not only a lightning impulse voltage generated between the maximum taps can be reduced but also potential vibration inside the tap winding can be suppressed by connecting a capacitor also to such intermediate tap, so that a winding which is resistive to lightning impulse voltage can be manufactured without excessive enhancement of insulation property of tap winding 3. A capacitor to be used forms a capacitor having an intermediate tap through combination of three electrodes 6 which are insulated by dielectric material (for example, insulation paper) 7 and are wound in a spiral manner.
摘要翻译：目的：为了形成变压器的小尺寸绕组，通过向电容器提供中间抽头并将这种抽头连接到抽头绕组的中间抽头，确保低电压端子的高雷击冲击测试电压和宽的抽头范围。构成：将中间抽头提供到要与抽头绕组连接的电容器，电容器的两个端子A，C连接在分接绕组3的最大抽头之间，电容器的中间抽头B连接到抽头的中间抽头绕组3.不仅可以减小最大抽头之间产生的雷电冲击电压，而且可以通过将电容器连接到这种中间抽头来抑制抽头绕组内的潜在振动，从而使耐受雷击冲击电压的绕组可以制造而不会过分地提高抽头绕组3的绝缘性能。所使用的电容器形成具有中间抽头的电容器，该电容器通过由电介质材料（例如绝缘纸）7绝缘的三个电极6的组合并缠绕在螺旋式

25. 发明专利

JPS60163545A BASE BAND OPTICAL PICTURE TRANSMITTER 失效
公开(公告)号：JPS60163545A
公开(公告)日：1985-08-26
申请号：JP1835484
申请日：1984-02-06
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： FUJITA HIROYUKI , OKADA KENJI
IPC分类号： H04B10/00 , H04B10/07 , H04B10/2507 , H04B10/54 , H04B10/564
摘要： PURPOSE:To decrease the effect of an overload input by supervising an optical output by means of a photodiode, obtaining an average value of the optical output and offsetting the fluctuation of the average value of the change in the average picture level so as to stabilize the optical output. CONSTITUTION:A video input signal is fed to a signal current drive circuit 2, its output is added with an output of a bias current drive circuit 2, modulates positively a laser diode LD3 and an optical signal is outputted from the LD3. Then the photodiode PD4 monitors an optical output, the average value of the optical output is calculated by an average value detecting circuit 5, its signal controls a reference value of a comparator amplifier 6, the fluctuation of the average value of the change in the average picture level is offset, and compared and amplified. The circuit 2 is controlled by the output of the amplifier 6, negative feedback is applied to a bias current of the LD3 and the optical output is stabilized.

26. 发明专利

JPS5932239A Digital receiver 失效
标题翻译：数字接收机
公开(公告)号：JPS5932239A
公开(公告)日：1984-02-21
申请号：JP14174682
申请日：1982-08-17
申请人： Hitachi Ltd
发明人： FUJITA HIROYUKI
IPC分类号： H04L25/40
CPC分类号： H04L25/40
摘要： PURPOSE:To cut off electrically a procesor of the post-stage, by monitoring a control voltage of a voltage controlled oscillator of a PLL, stopping a clock when the control voltage is not within a prescribed range and bringing a receiver output to a high impedance. CONSTITUTION:A PCM signal transmitted optically is received at a photo detector 1, converted into an electric signal, amplified 2 and inputted to a discriminating regenerative device 7, and a synchronizing signal is inputted to a phase comparator 3. A PLL is constituted of the comparator 3, a voltage controlled oscillator 5 and a filter 4, the regenerative device 7 discriminates and regenerates the normal data by the synchronizing signal from the oscillator 5, outputs the data via a tri-state buffer TSB8 and outputs the clock via a TSB9. A level monitor 6 monitors an output voltage Vd of the filter 4 and transmits a control signal to the TSBs 8, 9 when the out of synchronism of the oscillator 5 takes place because of the voltage Vd at the outside of the specified range due to the deterioration in the receiving level, brings the output of the TSB to a high impedance, the data and clock are cut off and the alarm is transmitted to the processor of the post-stage.
摘要翻译：目的：通过监控PLL的压控振荡器的控制电压来切断后级的处理器，当控制电压不在规定范围内时，停止时钟，并将接收器输出设置为高阻抗。构成：在光电检测器1处接收到光学传输的PCM信号，转换成电信号，放大2并输入到鉴别再生装置7，并将同步信号输入到相位比较器3. PLL由比较器3，压控振荡器5和滤波器4，再生装置7通过来自振荡器5的同步信号来鉴别和再生正常数据，经由三态缓冲器TSB8输出数据，并通过TSB9输出时钟。电平监视器6监视滤波器4的输出电压Vd，并且当振荡器5的不同步发生时，由于由于接收电平恶化，使TSB的输出达到高阻抗，数据和时钟被切断，报警发送到后级处理器。

27. 发明专利

JPS57164589A LIGHT OUTPUT STABILIZING METHOD 失效
公开(公告)号：JPS57164589A
公开(公告)日：1982-10-09
申请号：JP4938281
申请日：1981-04-03
申请人： HITACHI LTD
发明人： FUJITA HIROYUKI
IPC分类号： H04B10/572 , H01S5/068 , H01S5/0683 , H04B10/00 , H04B10/07 , H04B10/293 , H04B10/564
摘要： PURPOSE:To stabilize the light output by the variation of ambient temperature around a semiconductor laser, by equalizing the variation of oscillation threshold current with DC bias current to equalize the variation of differential efficiency with signal current. CONSTITUTION:A semiconductor laser is driven by the driving currents (a), (b) constituted of DC bias current and signal current. When the ambient temperature is 20 deg.C, the light output C at peak value 1mW is obtained by equalizing DC bias current with the threshold current 25mA of a semiconductor laser with signal current of 15mA. When 40 deg.C, the light output C at peak value 1mW is obtained by equalizing DC bias current with threshold current of 35mW of laser with signal current of 20mA. Thus, even when the ambient temperatue varies, constantly stable light output is obtained.

28. 发明专利

JPS5440647A PRODUCTION OF OPTICAL BRANCHING DEVICE 失效
公开(公告)号：JPS5440647A
公开(公告)日：1979-03-30
申请号：JP10634377
申请日：1977-09-06
申请人： HITACHI LTD
发明人： FUJITA HIROYUKI , MIYAKE KIYOHIDE , YAMAGUCHI KOUJI
IPC分类号： G02B6/28 , G02B5/00 , G02B27/10
摘要： PURPOSE:To reduce the insertion loss and to increase the mechanical strength by heating and pressurizing the contacting sides of a plurality of bundled fibers into a single fiber and fusing the end face of another fiber having similar diameter to the end face of that single fiber.

29. 发明专利

JP2005207884A Dangerous article detecting system 审中-公开
标题翻译：危险品检测系统
公开(公告)号：JP2005207884A
公开(公告)日：2005-08-04
申请号：JP2004014750
申请日：2004-01-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKASHIGE KEIKO , FUJITA HIROYUKI
IPC分类号： G01N27/62 , H01J49/04 , H01J49/26
摘要： PROBLEM TO BE SOLVED: To effectively put a detection system for hazardous articles to practical use.
SOLUTION: When a wiper 22 used for wiping off the surface of a bag 26 is inserted into a sample insertion port 20 by an inspector 24, the sample bonded to the wiper 22 is gasified, the air introduced from the sample insertion port 20 is gasified at other times, the gasified sample gas is ionized, and the mass of the ionized sample gas is analyzed to decide whether or not a dangerous article is contained in the sample gas from an analyzed result.
COPYRIGHT: (C)2005,JPO&NCIPI

30. 发明专利

JP2004361365A Security system 审中-公开
标题翻译：保安系统
公开(公告)号：JP2004361365A
公开(公告)日：2004-12-24
申请号：JP2003163359
申请日：2003-06-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUJITA HIROYUKI , NAKASHIGE KEIKO
IPC分类号： G01V11/00
摘要： PROBLEM TO BE SOLVED: To provide a security system with improved inspection speed with detecting a nonmetallic dangerous object. SOLUTION: The security system includes a millimeter wave fluoroscopy image detecting apparatus 100 using electromagnetic waves with substance permeability, and a trace method detecting apparatus 200. A control device 300 detects a specified substance by operating the trace method detecting apparatus 200, when a suspicious substance is detected by the millimeter wave fluoroscopy image detecting apparatus 100. A detection arrangement, having mass analysis functions, is used as the trace method detecting apparatus 200. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过检测非金属危险物体来提供具有改进的检查速度的安全系统。解决方案：安全系统包括使用具有物质渗透性的电磁波的毫米波透视图像检测装置100和跟踪方法检测装置200.控制装置300通过操作迹线方法检测装置200来检测指定物质，当使用毫米波透视图像检测装置100检测可疑物质。具有质量分析功能的检测装置被用作追踪方法检测装置200.（C）2005年，JPO＆NCIPI

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