公开(公告)号：US4168613A

公开(公告)日：1979-09-25

申请号：US930854

申请日：1978-08-03

申请人： Tadao Nakagawa ,  Itaru Hirayama ,  Hiroo Takeuchi

发明人： Tadao Nakagawa ,  Itaru Hirayama ,  Hiroo Takeuchi

IPC分类号： B60T11/22 ,  B60T17/22 ,  G01F23/74 ,  B60T11/20

CPC分类号： G01F23/74 ,  B60T11/22 ,  B60T17/225 ,  Y10T137/86228

摘要： A device comprising two oil reservoir tanks communicating with the two respective oil-hydraulic chambers of a tandem type master cylinder and also with each other through an upper and a lower interconnecting oil passage. One of the two tanks has a top opening for oil filling use and normally closed with a vented cap while the other tank is closed at the top and provided therein with an oil level detector means which comprises a stationary reed switch connected with an appropriate external alarm circuit and a permanent magnet vertically movable with the oil level in the tank to close the reed switch as the volume of oil stored is reduced to a predetermined minimum. With the device, even if one of the two oil-hydraulic lines connected with the master cylinder fails to function due to oil leakage, the other line can properly function without any pressure failure as, in the associated tank, a predetermined minimum volume of oil remains on account of the height of the lower oil passage.

摘要翻译： 一种装置，包括两个储油箱，其与串联型主缸的两个相应的油压室连通，并且还通过上部和下部互连油通道相互连接。 两个罐中的一个具有用于充油使用的顶部开口，并且通常用封闭的通风盖，而另一个罐在顶部封闭并且在其中设置油位检测器装置，其包括与适当的外部警报器连接的静止簧片开关 电路和永磁体，其随着油箱中的油位垂直移动，以随着储存的油的体积减少到预定的最小值而闭合舌簧开关。 使用该装置，即使与主缸连接的两个油压管路中的一个由于漏油而不能起作用，另一个管线可以正常工作而没有任何压力故障，因为在相关联的罐中，具有预定的最小体积的油 仍然是因为较低油路的高度。

公开(公告)号：US08934782B2

公开(公告)日：2015-01-13

申请号：US13576902

申请日：2011-02-03

申请人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

发明人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

IPC分类号： H04B10/00 ,  H04J14/06 ,  H04B10/532 ,  H04B10/50 ,  H04B10/60 ,  G02F1/01

CPC分类号： H04B10/5053 ,  G02F1/0136 ,  H04B10/532 ,  H04B10/60 ,  H04J14/06

摘要： A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.

摘要翻译： 传输信号的极化状态可以基于符号速率高速度地改变。通过随时间切换第一开关，第二开关和第三开关，X极化波I_信号之一作为Y轴， 通过对X偏振波_I信号执行逻辑反相，X偏振波Q_信号和由X偏振波Q_信号的逻辑反相引起的信号引起的信号被输入到第二调制器。 此外，通过随时间切换第一开关，第二开关和第三开关，第二调制器输入X极化波I_信号之一作为Y偏振波Q_信号，X偏振波I信号， 通过对X偏振波_I信号进行逻辑反转而引起的信号，X偏振波Q信号和由X偏振波Q信号执行逻辑反相引起的信号。 因此，可以基于符号速率速度高速地改变发送信号的偏振状态。

公开(公告)号：US20120099864A1

公开(公告)日：2012-04-26

申请号：US13380432

申请日：2010-07-14

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Tadao Nakagawa ,  Etsushi Yamazaki ,  Akihide Sano ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Shogo Yamanaka

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Tadao Nakagawa ,  Etsushi Yamazaki ,  Akihide Sano ,  Yutaka Miyamoto ,  Eiji Yoshida ,  Shogo Yamanaka

IPC分类号： H04J14/06 ,  H04B10/00

CPC分类号： H04B10/0775 ,  H04B3/06 ,  H04B10/25133

摘要： In order to compensate for chromatic dispersion caused by optical fiber transmission in a communication system with coherent detection using optical signals, specific frequency band signals are used to enable estimation of a chromatic dispersion value. The chromatic dispersion value calculating apparatus is provided with: a signal distributing circuit which distributes, into a plurality of signal sequences, an electrical digital signal converted from received optical signals of an optical signal transmitted by an optical signal transmitting apparatus, in which a known signal with concentrated frequency components of a plurality of specific frequencies is appended to a signal generated from a transmission data sequence; a plurality of frequency band pass filter circuits, each of which separating only each of a plurality of specific frequency components in which the known signal is included from each of the signal sequences distributed by the signal distributing circuit, and passing each of the specific frequency components therethrough; a plurality of power calculating circuits which are provided so as to correspond respectively to the plurality of frequency band pass filter circuits and which calculate power values of signals output from the corresponding frequency band pass filter circuits; a delay time calculating circuit which detects times at which power has the maximum value or times at which the power exceeds a predetermined threshold value, respectively from signal sequences of the power values output from the plurality of power calculating circuits, and which compares the detected times; and a chromatic dispersion value calculating circuit which calculates a chromatic dispersion value based on a comparison result of the times by the delay time calculating circuit.

摘要翻译： 为了补偿在使用光信号的相干检测的通信系统中由光纤传输引起的色散，使用特定的频带信号来使得能够估计色散值。 色散值计算装置具有：信号分配电路，其将由光信号发送装置发送的光信号的接收光信号转换成的数字信号分配成多个信号序列，其中已知信号 将多个特定频率的集中频率分量附加到从发送数据序列生成的信号上; 多个频带滤波器电路，每个频带通滤波器电路仅分离由信号分配电路分配的每个信号序列中包含已知信号的多个特定频率分量中的每一个，并且使每个特定频率分量 通过 多个功率计算电路，被设置为分别对应于所述多个频带滤波器电路，并且计算从相应的频带滤波器电路输出的信号的功率值; 延迟时间计算电路，分别从多个功率计算电路输出的功率值的信号序列中分别检测功率达到功率超过预定阈值的最大值或多次的时间，并且将延迟时间计算电路 ; 以及色散值计算电路，其基于延迟时间计算电路的时间的比较结果来计算色散值。

公开(公告)号：US06972685B2

公开(公告)日：2005-12-06

申请号：US10469683

申请日：2002-11-08

申请人： Tetsuya Sato ,  Koichi Sato ,  Tadao Nakagawa ,  Kiyoshi Enomoto ,  Toshio Hayakawa ,  Yoshiyuki Shimazaki

发明人： Tetsuya Sato ,  Koichi Sato ,  Tadao Nakagawa ,  Kiyoshi Enomoto ,  Toshio Hayakawa ,  Yoshiyuki Shimazaki

IPC分类号： G01F23/36 ,  H01C10/32 ,  G08B21/00

CPC分类号： G01F23/363 ,  H01C10/32

摘要： A liquid level detecting apparatus resistant to the deterioration and corrosion thereof is provided while holding down an increase in the manufacturing cost thereof. This apparatus 1 has fixed electrodes 3 on which a sliding contact point 5 is slidingly moved in accordance with a fluctuation of a float, and a first resistor 4 connected to the fixed electrodes 3, the fixed electrodes 3 being made of at least silver (Ag), palladium (Pd) and a glass component, a weight ratio of the silver (Ag) to palladium (Pd) being not lower than 75 wt. % to not higher than 25 wt. %, a sliding portion 7 of the fixed electrodes 3 on which the sliding contact point 5 is slidingly moved being covered with second resistors 8 a resistance value of which is lower than that of the first resistor 4.

摘要翻译： 提供耐劣化和腐蚀的液面检测装置，同时抑制其制造成本的增加。 该装置1具有固定电极3，滑动接触点5根据浮子的波动滑动移动，固定电极3与固定电极3连接，固定电极3至少由银（Ag ），钯（Pd）和玻璃成分，银（Ag）与钯（Pd）的重量比不低于75重量％ ％至不高于25wt。 ％，滑动接触点5滑动移动的固定电极3的滑动部分7被第二电阻器8覆盖，第二电阻器8的电阻值低于第一电阻器4的电阻值。

公开(公告)号：US20120315043A1

公开(公告)日：2012-12-13

申请号：US13576902

申请日：2011-02-03

申请人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

发明人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

IPC分类号： H04J14/06

CPC分类号： H04B10/5053 ,  G02F1/0136 ,  H04B10/532 ,  H04B10/60 ,  H04J14/06

摘要： A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.

摘要翻译： 传输信号的极化状态可以基于符号速率高速度地改变。通过随时间切换第一开关，第二开关和第三开关，X极化波I_信号之一作为Y轴， 通过对X偏振波_I信号执行逻辑反相，X偏振波Q_信号和由X偏振波Q_信号的逻辑反相引起的信号引起的信号被输入到第二调制器。 此外，通过随时间切换第一开关，第二开关和第三开关，第二调制器输入X极化波I_信号之一作为Y偏振波Q_信号，X偏振波I信号， 通过对X偏振波_I信号进行逻辑反转而引起的信号，X偏振波Q信号和由X偏振波Q信号执行逻辑反相引起的信号。 因此，可以基于符号速率速度高速地改变发送信号的偏振状态。

公开(公告)号：US20070006648A1

公开(公告)日：2007-01-11

申请号：US10558707

申请日：2004-05-17

申请人： Shigeki Koide ,  Kiyoshi Enomoto ,  Tadao Nakagawa ,  Yoshiyuki Shimazaki ,  Yoshihiro Kamimura ,  Tetsuya Satoh

发明人： Shigeki Koide ,  Kiyoshi Enomoto ,  Tadao Nakagawa ,  Yoshiyuki Shimazaki ,  Yoshihiro Kamimura ,  Tetsuya Satoh

IPC分类号： G01F23/00

CPC分类号： G01F23/36 ,  G01F23/363

摘要： The present invention provides an inexpensive small-sized liquid level detector. A liquid level detector 1 includes a float moving in accordance with variations in liquid level, a hard circuit board 5, resistors 12a and 12b provided on the circuit board 5, a first sliding path 14 made of a plurality of electrodes 13 provided on the circuit board 5 and connected to the resistors 12a and 12b, and a first contact 6 coming into contact with the first sliding path 14, and the liquid level detector 1 outputs an electrical signal based on the resistances of the resistors 12a and 12b which are varied by the first contact 6 coming into contact with at least one of the plurality of electrodes 13 forming the first sliding path 14 in accordance with a variation of the float. A second sliding path 15 electrically connected to the first sliding path 14 is provided on the circuit board 5, a second contact 7 coming into contact with the second sliding path 14 is provided, and each of the first and second contacts 6 and 7 is electrically connected to an external circuit.

摘要翻译： 本发明提供一种廉价的小型液位检测器。 液面检测器1包括根据液位变化移动的浮子，设置在电路板5上的硬电路板5，电阻器12a和12b，由多个电极13制成的第一滑动路径14， 电路板5并连接到电阻器12a和12b以及与第一滑动路径14接触的第一触点6，液位检测器1基于电阻器12a和11b的电阻输出电信号 第二触点6根据浮子的变化与形成第一滑动路径14的多个电极13中的至少一个接触而变化。 电连接到第一滑动路径14的第二滑动路径15设置在电路板5上，设置与第二滑动路径14接触的第二触点7，并且第一和第二触点6和7中的每一个电气 连接到外部电路。

公开(公告)号：US4050549A

公开(公告)日：1977-09-27

申请号：US680512

申请日：1976-04-26

申请人： Toshio Hori ,  Tadao Nakagawa

发明人： Toshio Hori ,  Tadao Nakagawa

IPC分类号： F16D55/224 ,  F16D65/14 ,  F16D65/46 ,  F16D55/08

CPC分类号： F16D65/46 ,  F16D55/224 ,  F16D2125/40

摘要： A disc brake device for motor-cycles and the like, constructed with a fixing bracket of inverted U-shape, having a flat horizontal roof plate and downwardly extending side plates, a pair of caliper arms joined together by a connecting rod and slidably mounted thereon in the space provided between the side plates, a fixed friction brake pad held in one of the caliper arms, a movable friction brake pad slidably inserted in a bore formed in the other caliper arm so as to be clamped with a brake disc of a wheel of the vehicle, interposed between the friction brake pads by a brake actuating lever through a screwing action between a male threaded nut member and a female threaded screw member embedded in the caliper arm that accommodates the movable friction pad, and an adjustment bolt provided concentrically with the screw and nut members to compensate wear occurring in the movable friction pad, the brake actuating lever being fitted to a square shaft provided at the end of the screw member, and tightly fastened thereto by a lock nut.

摘要翻译： 一种用于电动循环等的盘式制动装置，其构造为具有倒U形的固定支架，具有平坦的水平屋顶板和向下延伸的侧板，一对卡钳臂通过连杆连接在一起并可滑动地安装在其上 在设置在侧板之间的空间中，固定摩擦制动衬块，其固定在卡钳臂之一中;可移动摩擦制动衬块，其可滑动地插入形成在另一制动钳臂中的孔中，以便与轮的制动盘夹紧 通过制动促动杆通过内螺纹螺母构件和嵌入在卡钳臂内的内螺纹螺纹构件之间的螺旋动作插入在摩擦制动衬块之间，所述内螺纹螺纹构件容纳可移动摩擦垫;以及调节螺栓，其与 所述螺钉和螺母构件用于补偿在所述可移动摩擦垫中发生的磨损，所述制动器致动杆装配到设置在所述螺钉构件的端部处的方形轴上， 并通过锁紧螺母紧固在其上。

公开(公告)号：US09178614B2

公开(公告)日：2015-11-03

申请号：US13981298

申请日：2012-01-24

申请人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

发明人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

IPC分类号： H04B10/08 ,  H04B10/079 ,  H04B10/2513

CPC分类号： H04B10/07951 ,  H04B10/2513

摘要： A wavelength dispersion amount estimation method, a wavelength dispersion compensation circuit, and a receiving device which rapidly estimate and set a wavelength dispersion amount to compensate with high accuracy at the receiving device which compensates waveform distortion at an optical fiber transmission path. A wavelength dispersion compensation circuit includes an analog-digital converter which converts an optical analog waveform received from the optical fiber transmission path to a digital signal, a digital signal processor which compensates waveform distortion of the digital signal output from the analog-digital converter due to wavelength dispersion at the optical fiber transmission path with a dispersion compensation amount estimated with the wavelength dispersion amount estimation method, and a symbol clock extractor which extracts a symbol arrival timing clock of received data contained in the digital signal output from the analog-digital converter and outputs strength of the symbol arrival timing clock as the clock detection value.

摘要翻译： 波长色散量估计方法，波长色散补偿电路和接收装置，其快速估计和设置在补偿光纤传输路径上的波形失真的接收装置处以高精度补偿的波长色散量。 波长色散补偿电路包括将从光纤传输路径接收的光模拟波形转换为数字信号的模拟数字转换器，用于补偿由于模拟数字转换器输出的数字信号的波形失真，数字信号处理器由于 在具有由波长色散量估计方法估计的色散补偿量的光纤传输路径处的波长色散，以及符号时钟提取器，其提取包含在从模数转换器输出的数字信号中的接收数据的符号到达定时时钟，以及 输出符号到达定时时钟的强度作为时钟检测值。

公开(公告)号：US20130343749A1

公开(公告)日：2013-12-26

申请号：US13982507

申请日：2012-01-02

申请人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

发明人： Etsushi Yamazaki ,  Takayuki Kobayashi ,  Masahito Tomizawa ,  Riichi Kudo ,  Koichi Ishihara ,  Tadao Nakagawa ,  Mitsuteru Ishikawa

IPC分类号： H04B10/61

CPC分类号： H04B10/616 ,  G01M11/338 ,  H04B10/07951

摘要： A wavelength dispersion amount estimation method, a wavelength dispersion compensation circuit, and a receiving device which rapidly estimate and set a wavelength dispersion amount to compensate with high accuracy at the receiving device which compensates waveform distortion at an optical fiber transmission path. The wavelength dispersion compensation circuit includes an analog-digital converter which converts an optical analog waveform received from the optical fiber transmission path to a digital signal, a digital signal processor which compensates waveform distortion of the digital signal output from the analog-digital converter due to wavelength dispersion at the optical fiber transmission path with a dispersion compensation amount estimated with the wavelength dispersion amount estimation method, and a symbol clock extractor which extracts a symbol arrival timing clock of received data contained in the digital signal output from the analog-digital converter and outputs strength of the symbol arrival timing clock as the clock detection value.

摘要翻译： 波长色散量估计方法，波长色散补偿电路和接收装置，其快速估计和设置在补偿光纤传输路径上的波形失真的接收装置处以高精度补偿的波长色散量。 波长色散补偿电路包括将从光纤传输路径接收的光模拟波形转换为数字信号的模数转换器，数字信号处理器，其补偿由于模拟数字转换器输出的数字信号的波形失真 在具有由波长色散量估计方法估计的色散补偿量的光纤传输路径处的波长色散，以及符号时钟提取器，其提取包含在从模数转换器输出的数字信号中的接收数据的符号到达定时时钟，以及 输出符号到达定时时钟的强度作为时钟检测值。

公开(公告)号：US20130028595A1

公开(公告)日：2013-01-31

申请号：US13640114

申请日：2011-04-14

申请人： Tadao Nakagawa ,  Yasushi Takatori ,  Riichi Kudo ,  Munehiro Matsui ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Etsushi Yamazaki ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi ,  Yutaka Miyamoto

发明人： Tadao Nakagawa ,  Yasushi Takatori ,  Riichi Kudo ,  Munehiro Matsui ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Etsushi Yamazaki ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi ,  Yutaka Miyamoto

IPC分类号： H04B10/08

CPC分类号： H04L27/2657 ,  H04L27/2676 ,  H04L27/2684

摘要： When a circuit that calculates a frequency offset using a shape of a frequency spectrum is implemented by hardware, the circuit size can be reduced. A frequency offset estimating method for estimating the difference between a carrier frequency of a reception signal and the frequency of an output signal of a local oscillator includes performing a discrete Fourier transform on a reception signal previously sampled at a predetermined sampling frequency and outputting a frequency spectrum with a plurality of frequency components, calculating an average power of the frequency spectrum, calculating a threshold by adding a predetermined value to the average power or power obtained by multiplying the average power by a constant, performing 1-bit quantization on powers of the frequency components of the frequency spectrum based on the threshold, and calculating a centroid frequency by multiplying frequencies of the frequency components by powers of 1-bit quantized frequency components, calculating the sum of multiplied products, and dividing the sum of the products by the sum of the powers of the 1-bit quantized frequency components of the frequency spectrum.

摘要翻译： 当使用频谱的形状计算频率偏移的电路由硬件实现时，可以减小电路尺寸。 用于估计接收信号的载波频率与本地振荡器的输出信号的频率之间的差异的频率偏移估计方法包括对以预定采样频率预先采样的接收信号执行离散付里叶变换，并输出频谱 具有多个频率分量，计算频谱的平均功率，通过将平均功率或平均功率乘以常数获得的功率相加预定值来计算阈值，对频率的功率执行1比特量化 基于阈值的频谱的分量，并且通过将频率分量的频率乘以1比特量化频率分量的幂来计算质心频率，计算乘积的总和，并将乘积的和除以 1位量化频率分量的功率 频谱。