公开(公告)号：US06253154B1

公开(公告)日：2001-06-26

申请号：US08754484

申请日：1996-11-22

申请人： Hidekazu Oshizawa ,  Toshikazu Sakakibara ,  Noboru Taniguchi

发明人： Hidekazu Oshizawa ,  Toshikazu Sakakibara ,  Noboru Taniguchi

IPC分类号： G06F16500

CPC分类号： G01C21/28

摘要： An apparatus and method for more accurately determining the position of a moving object by using an azimuth detector distinct from an angular speed detector to correct the gain error and the offset error of the angular speed detector. The position of the moving body is determined using the offset error- and gain error-corrected angular speed. The correction of the offset error includes checking the azimuth and movement of the moving object for three predetermined periods of time; then checking whether the moving object was moving in a straight line each of the three predetermined periods of time. If the object was moving in a straight line each of the three predetermined periods of time, then an offset error correction value is computed using data from the second of the three predetermined periods of time. The correction of the gain error includes determining the movement of the moving object as straight; then determining the movement of the moving object as a turn; then determining the movement of the moving object as straight again. If the turn was a left turn, a left gain error correction value is computed. Similarly, if the turn was a right turn, a right gain error correction value is computed.

摘要翻译： 一种用于通过使用与角速度检测器不同的方位检测器更准确地确定移动物体的位置以校正角速度检测器的增益误差和偏移误差的装置和方法。 使用偏移误差和增益误差校正的角速度来确定移动体的位置。 偏移误差的校正包括在三个预定时间段内检查运动物体的方位和移动; 然后检查运动物体是否在三个预定时间段内每条直线移动。 如果物体在三个预定时间段中的每一个移动直线，则使用来自三个预定时间段中的第二个的数据来计算偏移误差校正值。 增益误差的校正包括确定移动物体的运动是直的; 然后确定移动物体的转动; 然后再确定运动物体的运动。 如果转弯是左转，则计算左增益误差校正值。 类似地，如果转弯是右转，则计算右增益误差校正值。

公开(公告)号：US5898390A

公开(公告)日：1999-04-27

申请号：US528075

申请日：1995-09-14

申请人： Hidekazu Oshizawa ,  Toshikazu Sakakibara

发明人： Hidekazu Oshizawa ,  Toshikazu Sakakibara

IPC分类号： G01C22/00 ,  G01C21/00 ,  G01C21/28 ,  G01C22/02 ,  G01C25/00 ,  G01S19/30 ,  G01S19/34 ,  G01S19/47 ,  G01S19/50 ,  G08G1/123

CPC分类号： G01C25/00 ,  G01C21/28 ,  G01C22/02

摘要： Method and apparatus for modifying an odometer reading in a vehicle navigation system to compensate for odometer errors. A first distance measurement is obtained from the odometer, and a second distance measurement is obtained from at least one other sensor. The difference between the first and second distance measurements is determined and an adjustment amount is generated in response thereto. A modification factor is then adjusted by the adjustment amount, the modification factor being for modifying the odometer reading. The odometer reading is then modified with the modification factor. A method and apparatus for selecting a pulse rate setting in a vehicle navigation system to correspond to a pulse rate associated with the odometer are also described. A first distance measurement is obtained from the odometer and a second distance measurement is obtained from at least one other sensor. The difference between the first and second distance measurements is then determined. The pulse rate setting is changed to correspond to the odometer pulse rate if the difference is greater than a threshold level, and is left unchanged if the difference is less than the threshold level.

摘要翻译： 用于修改车辆导航系统中的里程表读数以补偿里程计误差的方法和装置。 从里程表获得第一距离测量，并且从至少一个其他传感器获得第二距离测量。 确定第一和第二距离测量之间的差异，并且响应于此产生调整量。 然后通过调节量调整修正因子，修改因子用于修改里程表读数。 然后用修改因子修改里程表读数。 还描述了一种用于选择车辆导航系统中的脉搏率设置以对应于与里程计相关联的脉率的方法和装置。 从里程表获得第一距离测量，并且从至少一个其它传感器获得第二距离测量。 然后确定第一和第二距离测量之间的差异。 如果差值大于阈值电平，则脉搏率设置被改变为对应于里程表脉率，如果差值小于阈值电平，则脉冲率设置保持不变。

公开(公告)号：US5912635A

公开(公告)日：1999-06-15

申请号：US992528

申请日：1997-12-17

申请人： Hidekazu Oshizawa ,  Toshikazu Sakakibara

发明人： Hidekazu Oshizawa ,  Toshikazu Sakakibara

IPC分类号： G01C22/00 ,  G01C21/00 ,  G01C21/28 ,  G01C22/02 ,  G01C25/00 ,  G01S19/30 ,  G01S19/34 ,  G01S19/47 ,  G01S19/50 ,  G08G1/123

CPC分类号： G01C25/00 ,  G01C21/28 ,  G01C22/02

摘要： Method and apparatus for modifying an odometer reading in a vehicle navigation system to compensate for odometer errors. A first distance measurement is obtained from the odometer, and a second distance measurement is obtained from at least one other sensor. The difference between the first and second distance measurements is determined and an adjustment amount is generated in response thereto. A modification factor is then adjusted by the adjustment amount, the modification factor being for modifying the odometer reading. The odometer reading is then modified with the modification factor. A method and apparatus for selecting a pulse rate setting in a vehicle navigation system to correspond to a pulse rate associated with the odometer are also described. A first distance measurement is obtained from the odometer and a second distance measurement is obtained from at least one other sensor. The difference between the first and second distance measurements is then determined. The pulse rate setting is changed to correspond to the odometer pulse rate if the difference is greater than a threshold level, and is left unchanged if the difference is less than the threshold level.

公开(公告)号：US6147626A

公开(公告)日：2000-11-14

申请号：US132695

申请日：1998-08-11

申请人： Toshikazu Sakakibara

发明人： Toshikazu Sakakibara

IPC分类号： G01P13/00 ,  G01C19/00 ,  G01C21/28 ,  G01P9/00 ,  G01P21/02 ,  G08G1/123

CPC分类号： G01P21/02 ,  G01C21/28 ,  G01C25/005

摘要： A technique for determining a gyro zero voltage is provided. A gyroscope ("gyro") is installed in an automobile as a component of an on-board navigation system. The gyro outputs a voltage representing an angular velocity of the vehicle. The gyro output voltage representing zero angular velocity ("gyro zero voltage") is determined by first determining when the vehicle is stationary based upon the amount of noise in the output voltage of the gyro. When the vehicle is determined to be stationary, the gyro zero voltage is measured.

摘要翻译： 提供了一种用于确定陀螺仪零电压的技术。 陀螺仪（“陀螺仪”）作为车载导航系统的组件安装在汽车中。 陀螺仪输出表示车辆角速度的电压。 基于陀螺仪的输出电压中的噪声量首先确定车辆何时停止，来确定表示零角速度（“陀螺零电压”）的陀螺输出电压。 当车辆被确定为静止时，测量陀螺仪零电压。

公开(公告)号：US6058390A

公开(公告)日：2000-05-02

申请号：US753483

申请日：1996-11-26

申请人： Jeff Jyh-Min Liaw ,  Toshikazu Sakakibara

发明人： Jeff Jyh-Min Liaw ,  Toshikazu Sakakibara

IPC分类号： G01C21/00 ,  G06F12/00 ,  G06F17/30

CPC分类号： G06F17/30952 ,  Y10S707/99932

摘要： A method of using a DOS file system to access a file in a database is provided. In one embodiment implemented in an on-board vehicle navigation system, the file includes map data for a given geographic area. A file access table (FAT) is associated with the file system and references the file. The FAT has a plurality of locations, each location including a reference to one of the data clusters of the file and to another location in the FAT, forming a linked list of the references. The logical order in which the data clusters occur within the file is determined by following the linked list in the FAT for that file. A cluster table is then constructed for the file. The references to the data clusters are stored in consecutive locations of the cluster table according to the logical order of the data clusters within the file. The file is then accessed by sequentially accessing the consecutive locations in the cluster table to retrieve the data clusters.

摘要翻译： 提供了使用DOS文件系统访问数据库中的文件的方法。 在车载导航系统中实现的一个实施例中，文件包括用于给定地理区域的地图数据。 文件访问表（FAT）与文件系统相关联并引用该文件。 FAT具有多个位置，每个位置包括对文件的数据集群之一的引用以及FAT中的另一个位置，形成引用的链接列表。 数据集群在文件中发生的逻辑顺序是通过跟随该文件的FAT中的链表来确定的。 然后为文件构建一个集群表。 根据文件中数据集群的逻辑顺序，对数据集群的引用存储在集群表的连续位置。 然后通过顺序访问集群表中的连续位置来访问文件以检索数据集群。

公开(公告)号：US5922042A

公开(公告)日：1999-07-13

申请号：US722305

申请日：1996-09-30

申请人： Masayuki Sekine ,  Toshikazu Sakakibara

发明人： Masayuki Sekine ,  Toshikazu Sakakibara

IPC分类号： G01C21/00 ,  G01C21/34 ,  G01S19/48 ,  G06F15/50

CPC分类号： G01C21/34

摘要： An on-board automobile navigation system provides route guidance instructions to a user. The system detects a power-down of the vehicle and, in response, determines whether to resume route guidance in response to the next start-up of the vehicle. This determination is made prior to powering down the system. The determination is based on the current position of the vehicle and the computed route. If a determination was made to resume guidance after start-up, the selected destination and the computed route are saved in memory before powering down the system. If a determination was made to resume guidance, then in response to the next start-up of the vehicle, the selected destination and the computed route of the vehicle are recalled from memory, and route guidance is resumed from the current position of the vehicle.

摘要翻译： 车载汽车导航系统向用户提供路线指导指令。 系统检测到车辆的掉电，并且作为响应，确定是否响应于下一次车辆启动而恢复路线引导。 这种确定是在关闭系统电源之前进行的。 该确定基于车辆的当前位置和计算出的路线。 如果在启动后确定恢复指导，则在关闭系统电源之前，将所选目的地和计算出的路线保存在存储器中。 如果确定恢复指导，则响应于下一次启动车辆，从存储器调用所选择的目的地和计算出的车辆的路线，并且从车辆的当前位置恢复路线引导。

公开(公告)号：US4843877A

公开(公告)日：1989-07-04

申请号：US113180

申请日：1987-10-23

申请人： Takeo Kushida ,  Susumu Taira ,  Wataru Nagasaki ,  Hajime Muramatsu ,  Toshikazu Sakakibara

发明人： Takeo Kushida ,  Susumu Taira ,  Wataru Nagasaki ,  Hajime Muramatsu ,  Toshikazu Sakakibara

IPC分类号： G01P15/11

CPC分类号： G01P15/11

摘要： An acceleration sensor comprises a case having defined therein at least one accommodating chamber. At least one magnetic ball is accommodated in the accommodating chamber with a radial play left between the wall surface of the accommodating chamber and the magnetic ball. The magnetic ball is magnetically attracted to a reference position in the accommodating chamber by a magnetic field generating unit. In response to acceleration, deceleration or inclination, the magnetic ball is movable in the accommodating chamber against the attracting force of the magnetic field generating unit. The movement of the magnetic ball is detected by a detector.

摘要翻译： 加速度传感器包括其中限定有至少一个容纳室的壳体。 至少一个磁珠容纳在容纳室中，放置在容纳室的壁表面和磁珠之间。 磁性球通过磁场发生单元被磁吸引到容纳室中的参考位置。 响应于加速度，减速度或倾斜度，磁珠克服磁场产生单元的吸引力在容纳室中可移动。 磁珠的移动由检测器检测。