Method and apparatus for predicting x-ray tube failures in computed tomography systems
    1.
    发明授权
    Method and apparatus for predicting x-ray tube failures in computed tomography systems 失效
    用于预测计算机断层摄影系统中X射线管故障的方法和装置

    公开(公告)号:US06351517B1

    公开(公告)日:2002-02-26

    申请号:US09575699

    申请日:2000-07-07

    IPC分类号: H05G108

    CPC分类号: H05G1/08 G06F19/00 H05G1/54

    摘要: In predicting failure of an x-ray tube in a computed tomography (CT) system, reference detector elements normally disposed on each end of the detector, receive x-rays directly from the x-ray tube. In accordance with the invention, the output values of the reference detector elements are utilized by a tube condition prediction algorithm to predict a failure in the x-ray tube of the CT system. The tube condition prediction algorithm utilizes at least one model of the CT system and at least one prediction routine, which typically is a Kalman filter, to generate the prediction. The prediction routine uses the model to analyze the output values of the reference detector elements in order to determine the condition of the x-ray tube and predict future performance of the x-ray tube.

    摘要翻译: 在计算机断层摄影(CT)系统中预测X射线管的故障时,通常设置在检测器每端的参考探测器元件直接从X射线管接收X射线。 根据本发明,通过管状态预测算法利用参考检测器元件的输出值来预测CT系统的X射线管的故障。 管条件预测算法利用至少一个CT系统模型和通常是卡尔曼滤波器的至少一个预测程序来产生预测。 预测程序使用该模型来分析参考检测器元件的输出值,以便确定x射线管的状况并预测x射线管的未来性能。

    Traction vehicle adhesion control system without ground speed measurement
    2.
    发明授权
    Traction vehicle adhesion control system without ground speed measurement 有权
    牵引车辆附着力控制系统无地面速度测量

    公开(公告)号:US06208097B1

    公开(公告)日:2001-03-27

    申请号:US09455431

    申请日:1999-12-06

    IPC分类号: H02P1508

    摘要: An adhesion control system for a locomotive is provided for achieving and maintaining a maximum adhesion value. The adhesion control system includes a means for determining from an appropriate adhesion-creep curve an ideal creep rate that must be achieved and maintained in order to achieve and maintain a maximum adhesion value, a means for estimating an actual creep rate through the measurement or estimation of motor or wheel acceleration and locomotive acceleration, a means for selecting a creep rate set point based on a comparison of the actual creep rate and the ideal creep rate where the creep rate set point is set to a positive value if the actual creep rate is less than the ideal creep rate minus an acceptable differential and is set to a negative value if the actual creep rate is greater than the ideal creep rate plus the acceptable differential, and a means responsive to the creep rate set point for adjusting the operation of the locomotive so that the maximum adhesion value may be realized where the actual creep rate is increased if the creep rate set point is set to the positive value and is decreased if the creep rate set point is set to the negative value.

    摘要翻译: 提供了一种用于机车的粘附控制系统,用于实现和保持最大的附着值。 附着控制系统包括用于从适当的粘附蠕变曲线确定理想的蠕变速率的装置,该理想的蠕变速率必须被实现和维持以便实现和维持最大的附着值,用于通过测量或估计来估计实际蠕变速率的装置 电动机或车轮加速度和机车加速度的方法,用于根据实际蠕变速率和理想蠕变速率的比较来选择蠕变速率设定点的装置,其中如果实际蠕变速率为蠕变速率设定点,蠕变速率设定点设定为正值 小于理想蠕变速率减去可接受的差值,并且如果实际蠕变速率大于理想蠕变速率加上可接受的差值,则设定为负值,以及响应于蠕变速率设定点来调整操作的装置 机车,使得如果蠕变速率设定点被设定为正值,则可以实现实际蠕变速率增加的最大附着值 如果蠕变速率设定点设定为负值,则减小。

    Method and apparatus for rapid heat-up of a glass-ceramic cooktop
    3.
    发明授权
    Method and apparatus for rapid heat-up of a glass-ceramic cooktop 失效
    一种用于玻璃陶瓷炉灶快速加热的方法和装置

    公开(公告)号:US06350968B1

    公开(公告)日:2002-02-26

    申请号:US09687112

    申请日:2000-10-16

    IPC分类号: H05B102

    摘要: An apparatus for rapidly heating a cooktop is provided. The apparatus comprises a radiant heating element positioned proximate to the cooktop. A controller is provided and is connected to the radiant heating element. The controller includes a fast heat-up circuit selectively coupled to the radiant heating element. A look-up table is selectively coupled to the fast heat-up circuit. The look-up table comprises a plurality of user power levels. Each of the plurality of user power levels is correlated to a respective user-selected temperature. The apparatus further comprises a user power input device connected to the controller. The user power input device also allows selection of at least a first of the plurality of user power levels wherein the first power level corresponds to a first respective user selected temperature in the look-up table. A temperature sensor is connected to the controller for measuring a temperature of the cooktop.

    摘要翻译: 提供一种用于快速加热炉灶的装置。 该装置包括靠近炉灶定位的辐射加热元件。 提供控制器并连接到辐射加热元件。 控制器包括选择性地耦合到辐射加热元件的快速加热电路。 选择性地将查找表耦合到快速加热电路。 查找表包括多个用户功率电平。 多个用户功率电平中的每一个与相应的用户选择的温度相关。 该装置还包括连接到控制器的用户电力输入装置。 用户功率输入设备还允许选择多个用户功率电平中的至少第一功率电平,其中第一功率电平对应于查找表中的第一相应用户选择的温度。 温度传感器连接到控制器,用于测量炉灶的温度。

    Method and apparatus for thermal limiting of the temperature of a glass-ceramic cooktop
    5.
    发明授权
    Method and apparatus for thermal limiting of the temperature of a glass-ceramic cooktop 有权
    用于限制玻璃 - 陶瓷炉灶温度的方法和装置

    公开(公告)号:US06285012B1

    公开(公告)日:2001-09-04

    申请号:US09656245

    申请日:2000-09-06

    IPC分类号: H05B302

    CPC分类号: H05B3/746 H05B2213/07

    摘要: The temperature of a cooktop is controlled such that a maximum temperature of a cooktop reaches about a predetermined maximum temperature. The temperature is controlled by controlling power supplied to a radiant heating element positioned below the cooktop. The radiant heating element heats the cooktop. A user power input device allows a user to select a user power level corresponding to a desired temperature range for heating the cooktop. A temperature sensor is supplied that senses the temperature of the cooktop. A thermal limiter controller is connected to the radiant heating element, the user power input device and the temperature sensor. The thermal limiter controller determines a thermal limiting power level. The thermal limiter controller applies the smaller of the user power level and the thermal limiter power level to the radiant heating element. An anti-wind up controller is connected to the thermal limiter controller and tracks the thermal limiter power level to the user power level whereby a maximum temperature of the cooktop reaches about the predetermined maximum temperature.

    摘要翻译: 炉灶的温度被控制为使炉灶的最高温度达到大约预定的最高温度。 通过控制提供给位于炉灶面下方的辐射加热元件的功率来控制温度。 辐射加热元件加热炉灶。 用户电力输入装置允许用户选择对应于期望温度范围的加热炉灶的用户功率水平。 提供温度传感器来感测炉灶的温度。 热限制器控制器连接到辐射加热元件,用户电源输入设备和温度传感器。 热限制器控制器确定热限制功率电平。 热限制器控制器将较小的用户功率电平和热限制器功率电平应用于辐射加热元件。 防风上拉控制器连接到热限制器控制器,并将热限制器功率水平跟踪到用户功率水平,由此炉灶的最高温度达到约预定的最高温度。