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热词
    • 3. 发明授权
    • Method and sensor for sensing current in a conductor
    • 用于感测导体中电流的方法和传感器
    • US09297836B2
    • 2016-03-29
    • US13930940
    • 2013-06-28
    • Deere & Company
    • Brij N SinghNeal D ClementsAron FiskAndrew D Wieland
    • G01N27/72G01R15/20G01R15/18G01R31/42G01R19/00
    • G01R15/20G01R15/181G01R19/0007G01R31/42
    • A sensor comprises primary ferrite members spaced apart from the magnetic field sensor on opposite sides of the magnetic field sensor concentrate or steer an orientation of a magnetic field of the observed signal toward a target area of the magnetic field sensor. A magnetic field sensor senses a direct current signal component or lower frequency component of the observed signal. A first filtering circuit has a high-pass filter response. The first filtering circuit is coupled to the inductor to provide a filtered alternating current signal component. A second filtering circuit has a low-pass filter response. The second filtering circuit coupled to the magnetic field sensor to provide a filtered direct current signal component. A sensor fusion circuit determines an aggregate sensed current based on the filtered alternating current signal component and the filtered direct current signal component.
    • 传感器包括与磁场传感器相对侧的磁场传感器间隔开的主要铁氧体构件,或者将观测信号的磁场的取向转向磁场传感器的目标区域。 磁场传感器感测观测信号的直流信号分量或较低频率分量。 第一滤波电路具有高通滤波器响应。 第一滤波电路耦合到电感器以提供滤波的交流信号分量。 第二滤波电路具有低通滤波器响应。 第二滤波电路耦合到磁场传感器以提供滤波的直流信号分量。 传感器融合电路基于经过滤波的交流信号分量和经滤波的直流信号分量确定总感测电流。
    • 6. 发明授权
    • Portable spa monitoring and control circuitry
    • 便携式水疗监控和控制电路
    • US09006616B2
    • 2015-04-14
    • US13527014
    • 2012-06-19
    • Larry Nicholson
    • Larry Nicholson
    • H05B1/02G01R19/00
    • G01R19/0007H05B1/025
    • Control circuitry for controlling a spa water heater, wherein a microcontroller is configured to detect zero crossings of an A.C. line voltage from a voltage sense signal, to cause closing of a first heater relay and a second heater relay, to detect the time at which heater current is initially sensed by a current sensor after the initial closing of the second heater relay, to measure a time delay between the time that the second heater relay is closed and the time at which heater current is initially sensed, and to adjust the time at which a second closing of the second heater relay occurs such that zero crossings of the heater current occur at the same time as zero crossings of the voltage waveform. The control circuitry further includes a voltage sense circuit comprising a first diode connected in series with a current limiting resistance connected in series with a Zener diode, which is in turn connected in series with an optical coupler LED.
    • 用于控制温泉热水器的控制电路,其中微控制器被配置为检测来自电压检测信号的交流线路电压的过零点,以引起第一加热器继电器和第二加热器继电器的闭合,以检测加热器 在第二加热器继电器的初次闭合之后,电流最初由电流传感器感测,以测量第二加热器继电器闭合的时间与最初感测加热器电流的时间之间的时间延迟,并且调整时间 其中第二加热器继电器的第二次闭合发生,使得加热器电流的零交叉与电压波形的过零点同时发生。 控制电路还包括电压检测电路,其包括与与齐纳二极管串联连接的限流电阻串联连接的第一二极管,该齐纳二极管又与光耦合器LED串联连接。