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1. 发明授权

US4920544A Delta-sigma modulator 失效
标题翻译： Delta-Σ调制器
公开(公告)号：US4920544A
公开(公告)日：1990-04-24
申请号：US308555
申请日：1989-02-10
申请人： Seiji Endo , Osamu Kobayashi , Masatsugu Kamimura
发明人： Seiji Endo , Osamu Kobayashi , Masatsugu Kamimura
IPC分类号： H03M3/02 , H04B14/04
CPC分类号： H04B14/046 , H03M3/418
摘要： The delta-sigma modulator includes a secondary delta-sigma modulator which carries out a secondary delta-sigma modulation for an analog input signal, thereby producing a first quantization signal. A quantization noise extractor extracts a quantization noise occurring in the secondary delta-sigma modulator. A primary delta-sigma modulator carries out a first delta-sigma modulator for the quantization noise, thereby producing a second quantization signal. A differentiating circuit differentiates the second quantization signal supplied from the primary delta-sigma modulator. An adder adds the first quantization signal and an output signal of the differentiating circuit, thereby producing a digital output signal corresponding to the analog input signal.

2. 发明授权

US5182723A Computing method of floating-point represented data 失效
标题翻译：浮点数据的计算方法
公开(公告)号：US5182723A
公开(公告)日：1993-01-26
申请号：US767896
申请日：1991-09-30
申请人： Masatsugu Kamimura
发明人： Masatsugu Kamimura
IPC分类号： G06F7/487 , G06C15/00 , G06F7/00 , G06F7/544 , G06F7/57 , G06F7/76 , G10H1/02 , H03H17/00 , H03H17/02 , H03H17/04
CPC分类号： G06F7/5443 , G06F7/483 , G06F7/49942
摘要： A computing method of floating-point represented data including dividing data x with a n (n>M) bit length into high rank data X' and low rank data .alpha. with a mutual m bit length, a mantissa part of the high rank data X' leaving the same bits as those of the data x by k bits (k.gtoreq.1) from its initial bit to replace the rest of the bits of X' by zero, the low rank data .alpha. being formed as X--X', and computing other data together with the high rank data X' and the low rank data .alpha..

3. 发明授权

US6023653A Vehicle position detecting apparatus 失效
标题翻译：车辆位置检测装置
公开(公告)号：US6023653A
公开(公告)日：2000-02-08
申请号：US757451
申请日：1996-11-27
申请人： Atsushi Ichimura , Masatsugu Kamimura , Jyunichi Yamamoto
发明人： Atsushi Ichimura , Masatsugu Kamimura , Jyunichi Yamamoto
IPC分类号： G01C21/30 , G06F165/00
CPC分类号： G01C21/30
摘要： The navigation apparatus gives, to a map match processing portion, the measured present location and progress bearing of the vehicle with the use of the position bearing measuring portion for each predetermined period. The map match processing portion reads out the road data about the road close to the measured present position from the memory apparatus to effect the map match processing with respect to each link in accordance with the road data for correcting the measured present position. The correcting operation is effected only when the frequency, where the similarity degree with respect to the measured present position and progress bearing at this time is judged to be larger than the predetermined threshold value, is larger than the predetermined constant Ck. The road data are visually displayed on the visual displaying region of the displaying apparatus. The predetermined diagrams are displayed in a superimposed manner, in the corrected present position, on the road data visually displayed.
摘要翻译：导航装置通过使用位置轴承测量部分对每个预定周期给予地图匹配处理部分测量的当前位置和车辆的进行方位。地图匹配处理部分从存储装置读出接近测量的当前位置的道路的道路数据，以根据用于校正测量的当前位置的道路数据实现关于每条链路的地图匹配处理。校正操作只有当相对于测量的当前位置和此时的进行方向的相似度被判断为大于预定阈值的频率大于预定常数Ck时才进行。道路数据可视地显示在显示装置的视觉显示区域上。在校正的当前位置上，以可视显示的道路数据上的叠加方式显示预定图。

4. 发明授权

US5906653A Navigation system and gyroscopic device 失效
标题翻译：导航系统和陀螺仪
公开(公告)号：US5906653A
公开(公告)日：1999-05-25
申请号：US753698
申请日：1996-11-27
申请人： Atsushi Ichimura , Masatsugu Kamimura , Jyunichi Yamamoto
发明人： Atsushi Ichimura , Masatsugu Kamimura , Jyunichi Yamamoto
IPC分类号： G01C21/28 , G06F165/00
CPC分类号： G01C21/30
摘要： A processing apparatus within a navigation system comprises a track calculating portion for subsequently memorizing a bearing detected by a bearing sensor to calculate a track, and a map match processing portion for performing the map matching process. A position correcting portion corrects a vehicle position onto a road in accordance with road data 35 by the map match processing portion 34. The bearing correction is not effected when the bearing difference conditions are established although a bearing correcting portion 39 corrects the bearing showing the progressive direction of the vehicle into the link bearing of the road. The bearing difference condition is a condition where the bearing difference between the link bearing and the bearing showing the progressive direction of the vehicle is large, and there is a possibility of further increasing the error when the error of the bearing showing the progressive direction of the vehicle is large and the correction is effected in the link bearing. The offset correction can be carried out precisely with proper timing when a gyroscopic device is used as the bearing sensor.
摘要翻译：导航系统内的处理装置包括跟踪计算部分，用于随后存储由轴承传感器检测到的轴承以计算轨道，以及地图匹配处理部分，用于执行地图匹配处理。位置校正部根据地图匹配处理部34根据道路数据35将车辆位置校正到道路上。当确定轴承差异条件时，轴承校正部分不进行轴承校正，而轴承校正部分39校正显示渐进车辆的方向进入道路的连杆轴承。轴承差异条件是表示车辆的行进方向的连杆轴承和轴承的轴承差异大的情况，并且当表现出行进方向的轴承的误差存在误差时，可能会进一步增大误差车辆大，并且在连杆轴承中进行校正。当使用陀螺仪作为轴承传感器时，偏移校正可以在适当的时机精确地进行。

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