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    • 4. 发明授权
    • Rod and apparatus for calibrating magnetic roll testing apparatus
    • 棒和用于校准磁辊测试装置的设备
    • US06452380B1
    • 2002-09-17
    • US09535673
    • 2000-03-23
    • Wayne Gerard FieselerMark Duane FosterRobert Edward HackettCalvin Dale MurphyJames Edward Nichols
    • Wayne Gerard FieselerMark Duane FosterRobert Edward HackettCalvin Dale MurphyJames Edward Nichols
    • G01R3500
    • G01B7/24
    • A calibration rod (1) with grooved track (2) and a testing apparatus (17) for magnetic rolls that produces an accurate homing location and probe-to-probe reference for repeated test verification at many testing locations. The grooved track calibration rod can be transported to different equipment to verify that equipment is performing similarly, has improved accuracy, has temperature compensation, uses a circumferential drive movement from one end of a roll magnet and verifies angular position from the other end, eliminates the possibility of angular inaccuracy from twisting of the part being measured during clamping and provides for improved accuracy of several degrees. A high order polynomial curve fit of the data is used to determine the true value of the Gauss level being measured during 360 degree revolution. The apparatus takes measurements to accurately measure magnetic differences which define differences in probe operation. The value of other probes will be matched (multiplied by a percentage) to a first master reference probe. The apparatus eliminates twist, which can affect pole location accuracy by several degrees.
    • 具有带槽轨道(2)的校准杆(1)和用于磁辊的测试装置(17),其产生精确的归位位置和探针到探针参考,用于在许多测试位置进行重复测试验证。 带槽的轨道校准杆可以运输到不同的设备,以验证设备的性能是否相似,具有提高的精度,具有温度补偿功能,使用来自辊子磁体一端的周向驱动运动,并从另一端验证角位置, 在夹紧期间被测量的部件的扭转的角度不准确的可能性并且提供几度的改进的精度。 使用数据的高次多项式曲线拟合来确定在360度旋转期间测量的高斯电平的真实值。 该装置进行测量以精确测量定义探针操作差异的磁差。 其他探针的值将与第一个主参考探针匹配(乘以百分比)。 该装置消除扭曲,这可以将极点位置精度影响几度。
    • 6. 发明申请
    • Power Delivery To Heater Elements
    • 供电加热元件
    • US20090139982A1
    • 2009-06-04
    • US11946948
    • 2007-11-29
    • Jichang CaoJames Douglas GilmoreCalvin Dale Murphy
    • Jichang CaoJames Douglas GilmoreCalvin Dale Murphy
    • H05B1/02
    • H05B1/0241
    • Fuser heater element damage due to excessive heating power is prevented by estimating available power supply heating power for proper power control. The estimate is performed by applying a predefined portion of the heating power available from the power supply to the heater element. The predefined portion is determined so that the heater element will not be damaged even if the power supply is at the maximum voltage level of any power supply that may be encountered. The temperature of the heater element is measured, and, if below a predefined temperature, a heating power estimate is made. If not, the heater element is heated by applying power in accordance with a stored heating power estimate from the last heating power estimate. A heating power estimate is made each time the heating element is heated from a temperature below the predefined temperature.
    • 通过估计可用的电源供热功率以适当的功率控制来防止由于过热引起的定影加热器元件损坏。 通过将可从电源获得的加热功率的预定义部分应用到加热器元件来执行估计。 确定预定义部分,使得即使电源处于可能遇到的任何电源的最大电压电平,加热器元件也不会被损坏。 测量加热器元件的温度,如果低于预定温度,则进行加热功率估计。 如果不是,则通过根据来自最后加热功率估计的存储的加热功率估计来施加功率来加热加热器元件。 每当加热元件从低于预定温度的温度加热时,进行加热功率估计。