公开(公告)号：US5771224A

公开(公告)日：1998-06-23

申请号：US619211

申请日：1996-03-21

申请人： Takashi Seki ,  Noboru Taga ,  Shigeru Okita ,  Tatsuya Ishikawa

发明人： Takashi Seki ,  Noboru Taga ,  Shigeru Okita ,  Tatsuya Ishikawa

IPC分类号： H04L27/18 ,  H04J11/00 ,  H04L5/02 ,  H04L27/26 ,  H04L27/34

CPC分类号： H04L27/2657 ,  H04L27/18 ,  H04L27/2613 ,  H04L27/2675 ,  H04L27/34 ,  H04L25/0232 ,  H04L25/03159 ,  H04L27/2662 ,  H04L5/0048

摘要： A transmission system is disclosed which permits the receiving end to demodulate multi-valued modulated symbols successfully under fading conditions and reduces the amount of transmitted reference data to improve data transmission efficiency. At the transmitting end, a multiplexing section, a modulating section, and a transmitting section are provided. In transmitting an OFDM transmission frame, null symbols and reference symbols are placed in the beginning portion of the frame and QPSK symbols are placed in an information symbol data region in the frame with equal spacings in time and frequency. At the receiving end, a receiving section, a demodulation section, an equalizing section, and a demultiplexing section are provided. An error detector detects amplitude and phase errors of each carrier from the reference symbols, and a variation detector detects variations in the amplitude and phase of a received signal from the QPSK symbols. The carrier amplitude and phase errors are corrected by a correction information producing section on the amplitude and phase variations of the received signal detected by the variation detector to produce correction information. The equalizing section equalizes the demodulated symbol data according to the correction information.

摘要翻译： 公开了一种传输系统，其允许接收端在衰落条件下成功解调多值调制符号，并减少传输的参考数据量以提高数据传输效率。 在发送端，提供复用部分，调制部分和发送部分。 在发送OFDM传输帧时，将空符号和参考符号放置在帧的开始部分，并且将QPSK符号放置在帧中的时间和频率上等间隔的信息符号数据区域中。 在接收端设置有接收部分，解调部分，均衡部分和解复用部分。 误差检测器从参考符号检测每个载波的幅度和相位误差，并且变化检测器检测来自QPSK符号的接收信号的幅度和相位的变化。 载波振幅和相位误差由校正信息产生部分对由变化检测器检测到的接收信号的幅度和相位变化进行校正，以产生校正信息。 均衡部根据校正信息对解调符号数据进行均衡。

公开(公告)号：US5694389A

公开(公告)日：1997-12-02

申请号：US605742

申请日：1996-02-22

申请人： Takashi Seki ,  Noboru Taga ,  Shigeru Okita

发明人： Takashi Seki ,  Noboru Taga ,  Shigeru Okita

IPC分类号： H04L27/18 ,  H04J11/00 ,  H04J13/00 ,  H04J13/16 ,  H04L27/26

CPC分类号： H04L27/2657 ,  H04L27/2613 ,  H04L27/2675 ,  H04L27/2688

摘要： This invention improves the frequency acquisition range and the resistance to multipath interference. In a digital signal transmission system using OFDM, on the transmission side, some or all of a plurality of equidistant carrier positions are treated as reference carrier positions. The actual transmitted carriers are arranged in a predetermined pattern non-equidistant to the frequency carrier positions to form an OFDM symbol. This OFDM symbol is periodically transmitted as frequency reference symbols. On the reception side, the carrier arrangement pattern of the frequency reference symbols is detected, a carrier frequency offset is detected from the detected pattern offset, and the carrier frequency is compensated based on the frequency offset.

摘要翻译： 本发明改进了频率采集范围和抗多径干扰。 在使用OFDM的数字信号传输系统中，在发送侧，将多个等距的载波位置中的一些或全部视为参考载波位置。 实际发送的载波被布置成与等于载波位置的预定模式以形成OFDM符号。 周期性地将该OFDM符号作为频率参考符号发送。 在接收侧，检测频率参考符号的载波排列模式，从检测到的模式偏移检测载波频率偏移，并且基于频率偏移补偿载波频率。

公开(公告)号：US09383343B2

公开(公告)日：2016-07-05

申请号：US13581185

申请日：2011-10-28

申请人： Munetaka Mitsumura ,  Shigeru Okita

发明人： Munetaka Mitsumura ,  Shigeru Okita

IPC分类号： G01N29/44 ,  B62D1/16 ,  C22C21/00 ,  G01N23/04 ,  G01N29/07 ,  G01N3/20

CPC分类号： G01N29/4445 ,  B62D1/16 ,  C22C21/00 ,  G01N3/20 ,  G01N23/046 ,  G01N29/07 ,  G01N2203/0658 ,  G01N2223/419 ,  G01N2291/0289

摘要： There is provided an aluminum die cast part strength evaluating method is provided for correctly evaluating strength of an actual aluminum die cast part. Strength of the actual aluminum die cast part will be correctly evaluated by conducting ultrasonic inspection of a predetermined range of a high stress region of an aluminum die cast part, which is found out through stress analysis beforehand, for an internal defect, and evaluating that the aluminum die cast part has a predetermined strength if the maximum internal defect area within the predetermined range is equal to or less than a predetermined value. Moreover, an actual aluminum die cast part with a predetermined strength will be evaluated correctly by: evaluating strength using the aluminum die cast part strength evaluating method and setting the maximum-possible internal defect area within the predetermined range of the high stress region to 0.8 mm2 or less.

摘要翻译： 提供了一种用于正确评估实际铝压铸件的强度的铝压铸部件强度评估方法。 对于内部缺陷，通过预先通过应力分析发现的铝压铸件的高应力区域的预定范围的超声波检查来对实际的铝压铸部件的强度进行正确评价， 如果在预定范围内的最大内部缺陷面积等于或小于预定值，则铝压铸件具有预定的强度。 此外，通过以下方式，可以正确地评价具有规定强度的实际的铝压铸部件：使用铝压铸部件强度评价方法评价强度，将高应力区域的规定范围内的最大可能的内部缺陷面积设定为0.8mm 2 或更少。

公开(公告)号：US06869222B1

公开(公告)日：2005-03-22

申请号：US09719948

申请日：2000-05-09

申请人： Shigeru Okita ,  Kazuo Sekino ,  Toyohisa Yamamoto ,  Susumu Tanaka ,  Hiroyuki Ito ,  Akira Uchida ,  Kazuhiro Fujiu

发明人： Shigeru Okita ,  Kazuo Sekino ,  Toyohisa Yamamoto ,  Susumu Tanaka ,  Hiroyuki Ito ,  Akira Uchida ,  Kazuhiro Fujiu

IPC分类号： F04D29/06 ,  F16C19/08 ,  F16C19/16 ,  F16C19/18 ,  F16C33/30 ,  F16C33/38 ,  F16C33/41 ,  F16C33/44 ,  F16C33/66 ,  F16C19/00 ,  F16C33/58

CPC分类号： F16C33/425 ,  F04D29/063 ,  F16C19/06 ,  F16C19/08 ,  F16C19/163 ,  F16C33/30 ,  F16C33/414 ,  F16C33/416 ,  F16C33/44 ,  F16C33/6633 ,  F16C33/6688 ,  F16C2204/70 ,  F16C2240/34 ,  F16C2360/45

摘要： A full complement angular ball bearing with no cage and having a contact angle from 10 to 45° and an increased number of balls for use under severe conditions. The life is extended by defining the surface roughness of the inner ring and the outer ring, defining the roughness ratio of them relative to the rolling element, defining the Cr content in the alloy steel for the rolling element, forming the rolling element with oxide ceramics, or providing a dense nitride layer on the surface of the rolling element, avoiding the presence of particles with a mean diameter in excess of 3 μm on the raceway surfaces of the outer ring and the inner ring, or coating a film of a hardness higher than that of the raceway surface of the outer ring and the inner ring on the surface of the rolling element.

摘要翻译： 一个满载的角接触球轴承，不带保持架，接触角为10至45°，并且在恶劣条件下使用的球数增加。 通过限定内圈和外圈的表面粗糙度来确定其相对于滚动元件的粗糙度比的滚动体的寿命延长，限定用于滚动元件的合金钢中的Cr含量，用氧化物陶瓷形成滚动元件 或在滚动体的表面上设置致密的氮化物层，避免在外圈和内圈的滚道表面上存在平均直径超过3μm的颗粒，或者涂覆硬度更高的膜 比外圈的滚道面和滚动体的表面上的内圈高。

公开(公告)号：US06325867B1

公开(公告)日：2001-12-04

申请号：US08251575

申请日：1994-05-31

申请人： Shigeru Okita ,  Yasuo Utsumi ,  Akihiro Kiuchi

发明人： Shigeru Okita ,  Yasuo Utsumi ,  Akihiro Kiuchi

IPC分类号： C23C834

CPC分类号： F16C33/30 ,  C21D1/18 ,  C21D1/78 ,  C21D9/40 ,  C23C8/32 ,  F16C33/64 ,  Y10S148/906 ,  Y10T428/12458

摘要： A rolling bearing contains no more than 0.3 wt % of nitrogen in a grinding allowance portion after carbonitriding and hardening heat treatments, contains from 0.9 wt % (inclusive) up to 1.6 wt % (inclusive) of carbon and from 0.05 wt % (inclusive) up to 0.3 wt % (inclusive) of nitrogen in the surface layer of the finished part and has a nitrogen gradient of no more than 0.5 wt %/mm in the surface layer of the finished part. The rolling bearings are improved in grinding efficiency and which have their rolling life extended significantly.

摘要翻译： 在碳氮共渗和硬化热处理之后，滚动轴承在研磨余量部分中含有不超过0.3重量％的氮，含有0.9重量％（含）至1.6重量％（含）的碳和0.05重量％（含） 在最终部件的表层中最多含有0.3重量％（含氮）氮，并且在成品部件的表面层中具有不超过0.5重量％/ mm 3的氮梯度。 滚动轴承的研磨效率提高，滚动寿命显着延长。

公开(公告)号：US6071358A

公开(公告)日：2000-06-06

申请号：US933966

申请日：1997-09-19

申请人： Shigeru Okita ,  Susumu Tanaka ,  Manabu Ohori ,  Koji Ueda ,  Akihiro Kiuchi

发明人： Shigeru Okita ,  Susumu Tanaka ,  Manabu Ohori ,  Koji Ueda ,  Akihiro Kiuchi

IPC分类号： C21D9/36 ,  C21D9/40 ,  C22C38/00 ,  C22C38/04 ,  C22C38/18 ,  F16C33/30 ,  F16C33/32 ,  F16C33/62

CPC分类号： F16C33/30 ,  C22C38/04 ,  C22C38/18 ,  F16C33/32 ,  F16C33/62 ,  F16C41/008 ,  C21D9/36 ,  C21D9/40 ,  Y10S148/906

摘要： At least one of the components of a rolling member used in a manner in which it is rolled or slid with a mated member is made of carbon steel containing 0.8%-0.9% by weight of C, 0.1%-0.7% by weight of Si, 0.5%-1.1% by weight of Mn, and 0.1%-0.6% by weight of Cr and Fe substantially in the remaining part, wherein an ideal critical diameter DI value calculated from the compositions is 1.5-4.0, and the retained austenite amount after hardened heat treatment is 8%-22% by volume. The value DI is determined by the following equation:DI=(0.311.times.C %.sup.0.498).times.(0.7.times.Si %+1).times.(3.33.times.Mn %+1).times.(2.16.times.Cr %+1)

摘要翻译： 以与配合部件一起滚动或滑动的方式使用的滚动部件的至少一个部件由碳钢制成，所述碳钢含有0.8重量％〜0.9重量％的C，0.1重量％〜0.7重量％的Si ，0.5％-1.1重量％的Mn和0.1％-0.6重量％的Cr和Fe，其中由组合物计算出的理想临界直径DI值为1.5-4.0，残留奥氏体量 硬化热处理后为8％-22％。 值DI由以下等式确定：DI =（0.311×C％0.498）×（0.7×Si％+ 1）×（3.33×Mn％+ 1）×（2.16×Cr％+ 1）

公开(公告)号：US5651032A

公开(公告)日：1997-07-22

申请号：US334349

申请日：1994-11-02

申请人： Shigeru Okita

发明人： Shigeru Okita

IPC分类号： H03M13/41 ,  H04L1/00

CPC分类号： H03M13/6502 ,  H03M13/256 ,  H03M13/3961 ,  H03M13/41

摘要： A digital data processing apparatus capable of reducing a circuit scale without deteriorating error-correcting capability, and capable of reducing the bit number of a branch metric calculating circuit. The apparatus includes: a region determining portion which determines an optimal bit number corresponding to the number of representative symbol groups; a delaying portion which delays an output from the region determining portion for as long as a coded bit is decoded by a Viterbi decoding portion; and a decoding portion which inputs and decodes an output from the delaying portion and a coded bit that is decoded by the Viterbi decoding portion so as to be decoded, and which outputs the uncoded bit.

摘要翻译： 一种数字数据处理装置，能够在不恶化纠错能力的情况下降低电路规模，能够减少分支量度计算电路的位数。 该装置包括：区域确定部分，其确定对应于代表符号组的数量的最佳比特数; 只要编码比特被维特比解码部分解码，延迟部分就延迟来自区域确定部分的输出; 以及解码部分，其输入和解码来自延迟部分的输出和由维特比解码部分解码的编码比特，以便被解码，并且其输出未编码比特。

公开(公告)号：US5137375A

公开(公告)日：1992-08-11

申请号：US699901

申请日：1991-05-14

申请人： Yasuo Murakami ,  Kyozaburo Furumura ,  Shinichi Shirota ,  Shigeru Okita

发明人： Yasuo Murakami ,  Kyozaburo Furumura ,  Shinichi Shirota ,  Shigeru Okita

IPC分类号： C21D9/36 ,  C22C38/00 ,  C22C38/44 ,  C23C8/38 ,  C23C8/80 ,  F16C33/30 ,  F16C33/62

CPC分类号： C21D9/36 ,  C23C8/80 ,  F16C33/30 ,  F16C33/62 ,  Y10S384/912

摘要： A rolling bearing having bearing rings and rolling members wherein at least one of the bearing rings and the rolling members essentially consists of an alloy steel which contains carbide-forming elements. The bearing rings and the rolling members are subjected to carburizing or carbo-nitriding and then hardening to form a rolling surface layer. The content of retained austenite (.gamma..sub.R vol %) in the rolling surface layer is from 20 to 45% by volume and the hardness (Hv) of the rolling surface layer reinforced by dispersion of fine carbides or carbonitrides with an average grain size of from 0.5 to 1.5 .mu.m with regard to the content of the retained austenite (.gamma..sub.R vol %) is within the range of:-4.7.times.(.gamma..sub.R vol %)+920.ltoreq.Hv.ltoreq.-4.7.times.(.gamma..sub.R vol %)+1020.

摘要翻译： 一种具有轴承环和滚动件的滚动轴承，其中至少一个轴承环和滚动件基本上由含有碳化物形成元件的合金钢组成。 对轴承圈和滚动体进行渗碳或碳氮化，然后进行硬化以形成滚动表面层。 滚动面层中的残留奥氏体含量（γR vol％）为20〜45体积％，通过将碳化硅或碳氮化钛的平均粒径分散而得到的滚动面层的硬度（Hv） 相对于残留奥氏体（γR vol％）的含量为0.5〜1.5μm的范围为：-4.7×（γR vol％）+ 920

公开(公告)号：US20060230856A1

公开(公告)日：2006-10-19

申请号：US11433423

申请日：2006-05-15

申请人： Shigeru Okita ,  Hideyuki Uyama ,  Susumu Tanaka ,  Kenichi Iso

发明人： Shigeru Okita ,  Hideyuki Uyama ,  Susumu Tanaka ,  Kenichi Iso

IPC分类号： F16H1/24

CPC分类号： F16C33/3706 ,  F16C29/06 ,  F16C33/32 ,  F16H25/2238 ,  F16H2025/2242 ,  F16H2025/249 ,  Y10T74/19777

摘要： A ball screw (1) as a linear motion device according to the invention has retaining pieces (21) each having two concave surfaces (23) facing adjacent ones of rolling elements (9) respectively. Each of the retaining pieces (21) is disposed between adjacent ones of the rolling elements (9). A carbonitrided layer containing residual austenite of 15-40% by volume is provided in the surface layer of each of the rolling elements (9).

摘要翻译： 作为根据本发明的直线运动装置的滚珠丝杠（1）具有分别具有面向相邻滚动体（9）的两个凹面（23）的保持片（21）。 每个保持片（21）设置在相邻的滚动元件（9）之间。 在各滚动体（9）的表面层设置含有15〜40体积％的残留奥氏体的碳氮共渗层。

公开(公告)号：US07004637B1

公开(公告)日：2006-02-28

申请号：US11035766

申请日：2005-01-14

申请人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

发明人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

IPC分类号： F16C13/00 ,  F16C43/00

CPC分类号： C22C38/28 ,  B60B27/00 ,  C21D9/40 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  F16C19/185 ,  F16C19/186 ,  F16C33/64 ,  F16C2326/02 ,  Y10S384/913 ,  Y10T29/49679

摘要： In a wheel-support rolling bearing unit, in order to made a flange 6 thinner and thus lighten the bearing unit without impairing fatigue strength, machinability, and workability after forging, the composition of the alloy steel constituting the flange attached member (hub ring 2), the surface hardness of the root portion 14 on the axial outside surface side of the flange 6, and the surface roughness, are stipulated to thereby improve the durability ratio (fatigue limit strength/tensile strength) of the flange 6. In one aspect, the member is made from an alloy steel containing C: 0.5 to 0.65 weight %, Mn: 0.3 to 1.5 weight %, Si: 0.1 to 1.0 weight %, Cr: 0.01 to 0.5 weight %, S: 0.35 weight % or less, and any one type or more selected from 0.01 to 0.2 weight % of V, 0.01 to 0.15 weight % of Nb, and 0.01 to 0.15 weight % of Ti, with the rest being Fe and inevitable impurities, and the oxygen contents is 15 ppm or less. Moreover, the surface hardness of the inner raceway 7a formed with the hardened layer, is between Hv 650 and 780, and the surface hardness of a portion not formed with the hardened layer is between Hv 230 and 300.

摘要翻译： 在车轮支承滚动轴承单元中，为了使凸缘6更薄，从而减轻轴承单元，而不损害锻造后的疲劳强度，机械加工性和可加工性，构成凸缘连接构件（轮毂环2 ），规定法兰6的轴向外表面侧的根部14的表面硬度和表面粗糙度，从而提高凸缘6的耐久性（疲劳极限强度/拉伸强度）。 一方面，该构件由C：0.5〜0.65重量％，Mn：0.3〜1.5重量％，Si：0.1〜1.0重量％，Cr：0.01〜0.5重量％，S：0.35重量％ 以下，V：0.01〜0.2重量％，Nb：0.01〜0.15重量％，Ti：0.01〜0.15重量％，其余为Fe和不可避免的杂质，氧含量为 15ppm以下。 此外，形成有硬化层的内侧滚道7a的表面硬度为Hv650〜780，未形成硬化层的部分的表面硬度为Hv 230〜300。