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1. 发明专利

JP2009083621A Resonance type track circuit 有权
标题翻译：谐振型电路
公开(公告)号：JP2009083621A
公开(公告)日：2009-04-23
申请号：JP2007254801
申请日：2007-09-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TOMIOKA NAOYA , SAKAKAD GOUSHIRO , IKEDA HISAHIRO
IPC分类号： B61L23/14
摘要： PROBLEM TO BE SOLVED: To eliminate a disadvantage that the level of the ATC signal out of the ATC signal and TD signal transmitting on a track circuit is high, an attenuator and a BPF for removing noise must be provided on a rear stage of a branching filter for attenuating the ATC signal, and therefore, the size of an apparatus is increased.
SOLUTION: A resonance type track circuit using a loop line has a site MT installed therein, and a parallel resonator for the ATC signal band connected to a front stage of the site MT. By reducing the impedance of the loop line of the ATC signal band to be small, only the voltage value is reduced without changing the power of the ATC signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题为了消除在轨道电路上传输的ATC信号和TD信号之外的ATC信号的电平高的缺点，必须在后级提供用于消除噪声的衰减器和BPF 用于衰减ATC信号的分路滤波器，因此增加了装置的尺寸。解决方案：使用环路线的谐振型轨道电路具有安装在其中的位置MT，以及连接到站点MT的前级的用于ATC信号频带的并联谐振器。通过将ATC信号频带的环路线路的阻抗减小到较小，仅在不改变ATC信号的功率的情况下降低电压值。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2006248433A Train detection apparatus 有权
标题翻译：火车检测装置
公开(公告)号：JP2006248433A
公开(公告)日：2006-09-21
申请号：JP2005069390
申请日：2005-03-11
申请人： Hitachi Information & Control Solutions Ltd , Hitachi Ltd , 株式会社日立情報制御ソリューションズ , 株式会社日立製作所
发明人： SAKURAI HIDEAKI , TADA YUTAKA , IKEDA HISAHIRO , SAKAKAD GOUSHIRO , KIKUCHI KENJI
IPC分类号： B61L23/16
摘要： PROBLEM TO BE SOLVED: To attain size and cost reductions of an apparatus by reducing the number of parts while performing highly efficient signal detection and output switching.
SOLUTION: This train detection apparatus includes: a central control section 15 which detects a train detection state from an on-track receiving signal received by a receiving section and supplies a transmission signal indicating a train detection state to a transmission circuit section 22 in a predetermined transmission timing; a single detection circuit 16 for detecting the presence of the transmission signal indicating the train detection state supplied to the transmission circuit section 22 from the central control section 15; and a transmission switching circuit 23 for switching the transmission signal indicating the train detection state detected by the single detection circuit 16, for every track according to a switching signal output from the central control section 15 in response to transmission timing.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过在执行高效率的信号检测和输出切换的同时减少部件数量来实现装置的尺寸和成本降低。该列车检测装置包括：中央控制部15，其从由接收部接收到的在轨接收信号检测列车检测状态，并向发送电路部22提供表示列车检测状态的发送信号在预定的发送定时中; 单个检测电路16，用于从中央控制部15检测表示提供给发送电路部22的列车检测状态的发送信号的存在; 以及发送切换电路23，用于根据从中央控制部分15输出的响应于发送定时的切换信号，针对每个轨道切换指示由单个检测电路16检测到的列车检测状态的发送信号。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2008259103A Means for detecting abnormality of carrier wave frequency 有权
标题翻译：检测载波波频率异常的方法
公开(公告)号：JP2008259103A
公开(公告)日：2008-10-23
申请号：JP2007101625
申请日：2007-04-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MAKI YUJI , IKEDA HISAHIRO , TAKEHARA TAKESHI , SAKAKAD GOUSHIRO , KIKUCHI KENJI
IPC分类号： H04L27/10
摘要： PROBLEM TO BE SOLVED: To detect abnormality of a carrier wave frequency oscillator by measuring a carrier frequency component contained in a modulation wave while paying attention to the fact that a frequency component of a carrier wave is present in the modulation wave in a system which performs modulation using the carrier wave.
SOLUTION: A means for detecting abnormality of a carrier frequency is characterized in that, while using the characteristic that a modulation wave outputted from a modulation means is varied within one term unit of a carrier wave frequency, abnormality of the carrier wave frequency is detected by detecting that the number of times of varying the carrier wave per unit time exceeds a predetermined threshold.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过测量调制波中包含的载波频率分量来检测载波频率振荡器的异常，同时注意在调制波中存在载波的频率分量的事实使用载波进行调制的系统。解决方案：用于检测载波频率异常的装置的特征在于，在使用从调制装置输出的调制波在载波频率的一个单位内变化的特性的同时，载波频率的异常通过检测每单位时间改变载波的次数超过预定阈值来检测。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2001339256A SWITCHING TYPE ALTERNATING-CURRENT SIGNAL AMPLIFIER 失效
公开(公告)号：JP2001339256A
公开(公告)日：2001-12-07
申请号：JP2000156121
申请日：2000-05-26
申请人： HITACHI LTD , HITACHI INF & CONTROL SYST
发明人： KIKUCHI KENJI , TADA YUTAKA , NOMI MAKOTO , SAKAKAD GOUSHIRO
IPC分类号： H03F1/34 , H03F1/56 , H03F3/217
摘要： PROBLEM TO BE SOLVED: To suppress increases in the output capacity, size, and cost of a switching type AC signal amplifier. SOLUTION: An adding circuit 2 adds the input voltage Vin inputted from an AC signal source 10 to the switching type AC signal amplifier 1 to a feedback voltage Vfb and a pulse-width modulating circuit 4 converts the added signal Va into a switching signal Vs. An inverter circuit 5 amplifies the electric power of the signal Vs and an output voltage Vout is outputted through a filter 7. The output current Iout of the inverter circuit is detected by a current detecting circuit 6 and converted into a voltage signal Vfb by a current/voltage converting circuit 8 which has a feedback coefficient and forms a feedback circuit. Here, the output impedance of the amplifier viewed from the amplifier and an output terminal is equal to the feedback coefficient and held constant even if the output current Iout or the AC signal inputted from the output terminal vary owing to the variation of a load 11, so that the above output impedance functions as active output impedance.

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