Navigation system furnished with means for estimating error of mounted
sensor
    1.
    发明授权
    Navigation system furnished with means for estimating error of mounted sensor 失效
    具有估计安装传感器误差的装置的导航系统

    公开(公告)号:US6081230A

    公开(公告)日:2000-06-27

    申请号:US349172

    申请日:1994-12-02

    摘要: A navigation system which can enhance the position determining accuracy of a mobile object without employing any high precision measuring instrument. The navigation system comprises a GPS range measuring device, an angular velocity measuring device, a velocity measuring device and an azimuth measuring device, which measure the motion of the mobile object; a GPS range error estimating device, an angular velocity error estimating device, a velocity error estimating device and an azimuth error estimating device, which estimate errors involved in the respectively corresponding measuring devices; and a position calculating device which calculates the position of the mobile object from the outputs of the error estimating devices. The error estimating devices are implemented by Kalman filters and averaging processes. The factors of the errors of the individual measuring devices are assumed, and the outputs thereof are corrected, so that the position of the mobile object can always be determined at a high accuracy without employing any high precision sensor.

    摘要翻译: 一种导航系统,可以在不使用任何高精度测量仪器的情况下提高移动物体的位置确定精度。 导航系统包括测量移动物体的运动的GPS测距装置,角速度测量装置,速度测量装置和方位测量装置; GPS范围误差估计装置,角速度误差估计装置,速度误差估计装置和方位误差估计装置,其估计分别对应的测量装置中涉及的误差; 以及位置计算装置,其从所述误差估计装置的输出计算所述移动体的位置。 误差估计装置由卡尔曼滤波器和平均过程实现。 假设各个测量装置的误差的因素,并且其输出被校正,使得可以总是高精度地确定移动对象的位置,而不使用任何高精度传感器。

    Water level control system for a reservoir
    4.
    发明授权
    Water level control system for a reservoir 失效
    水库水位控制系统

    公开(公告)号:US4332507A

    公开(公告)日:1982-06-01

    申请号:US98234

    申请日:1979-11-28

    IPC分类号: E02B7/20 G05D9/12

    CPC分类号: G05D9/12 Y10T137/7287

    摘要: A water level control system for a reservoir includes steps of detecting water level, outflow rate and inflow rate of the reservoir detecting modified water level corresponding to the reservoir's content depending on the actual water level, the outflow rate and the inflow rate, and controlling the outflow rate of the reservoir in response to a deviation value between a set reference and the modified water level, thereby reducing the influence of undesirable water level fluctuation.

    摘要翻译: 水库水位控制系统包括根据实际水位,流出率和流入速率,根据水库内容检测储层检测水位变化水位的水位,流出率和流入量的步骤,并控制 响应于设定参考值与改进水位之间的偏差值,储层的流出速率,从而减少不期望的水位波动的影响。

    Portable position detector and position management system
    7.
    发明授权
    Portable position detector and position management system 失效
    便携式位置检测器和位置管理系统

    公开(公告)号:US6132391A

    公开(公告)日:2000-10-17

    申请号:US221606

    申请日:1998-12-29

    CPC分类号: G01C21/005 G01C22/006

    摘要: A portable position detector and a position management system that are capable of accurately detecting the direction of a walking body even when GPS signals cannot be received (or without reception) and thereby enhancing the accuracy of the dead reckoned position of the walking body.The portable position detector is equipped with a pedometer and a geomagnetic sensor. With the pedometer, the moved distance of a walker is detected by a calculation of "the number of steps.times.the length of a step". The moved direction is detected with the geomagnetic sensor. With this, the moved position of the walker is accurately detected by the self-contained navigation system. Particularly, even in the case where the position detector is located in a forest or between buildings where a signal cannot be received from a global positioning system (GPS) due to high buildings, banks, and forests, the position detector with a portable size and weight applicable to a walker can know with a practically sufficient degree of accuracy the position of a person carrying this portable detector by the self-contained navigation system.

    摘要翻译: 便携式位置检测器和位置管理系统,即使在GPS信号不能接收(或不接收)的情况下也能够精确地检测走路体的方向,从而提高步行体的死位置的准确性。 便携式位置检测器配有计步器和地磁传感器。 使用计步器,通过计算“步长的步数”来检测步行者的移动距离。 用地磁传感器检测移动的方向。 由此,由独立导航系统准确地检测步行者的移动位置。 特别地,即使在位置检测器位于森林中或建筑物之间由于高建筑物,银行和森林而不能从全球定位系统(GPS)接收信号的情况下,具有便携式尺寸的位置检测器和 适用于步行者的重量可以通过独立导航系统以实际足够的精度知道携带该便携式检测器的人的位置。

    Method of fuel injection control in engine
    10.
    发明授权
    Method of fuel injection control in engine 失效
    发动机燃油喷射控制方法

    公开(公告)号:US4792905A

    公开(公告)日:1988-12-20

    申请号:US861996

    申请日:1986-05-12

    摘要: A method of controlling the quantity of fuel to be injected into an intake manifold for an engine by a fuel injection unit comprising the steps of identifying parameters indicative of a change in the dynamic characteristic of the fuel supply system due to changes in the environmental conditions including the atmospheric pressure and engine temperature, estimating the quantity of fuel to be supplied to the engine cylinder on the basis of the identified parameters, and controlling the quantity of fuel to be injected so that the ratio between the measured quantity of air supplied to the engine cylinder and the estimated quantity of fuel supplied to the engine cylinder attains the desired air-fuel ratio.

    摘要翻译: 一种通过燃料喷射单元控制喷射到用于发动机的进气歧管中的燃料量的方法,包括以下步骤:识别由于环境条件的变化引起的燃料供应系统的动态特性变化的参数,包括 大气压力和发动机温度,基于所识别的参数来估计要供应给发动机气缸的燃料量,以及控制要喷射的燃料量,使得供应给发动机的空气的测量量之间的比率 并且提供给发动机气缸的估计燃料量达到所需的空燃比。