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    • 28. 发明授权
    • Solid-state lighting apparatus and methods using energy storage with segment control
    • 使用节能控制的固态照明装置和方法
    • US09131571B2
    • 2015-09-08
    • US13616368
    • 2012-09-14
    • Jun ZhangLiqin Ni
    • Jun ZhangLiqin Ni
    • H05B37/00H05B33/08
    • H05B33/0824H05B33/083
    • A lighting apparatus includes a rectifier circuit configured to be coupled to an AC source and to produce a rectified voltage from an AC voltage and a string including at least two serially-connected LED segments and coupled to the rectifier circuit. A segment control circuit is configured to selectively bypass at least one segment of the string responsive to the rectified voltage. An energy storage circuit is coupled to the rectifier circuit and controls current flow between at least one energy storage device and the string. A control circuit controls the segment control circuit and the energy storage circuit. The segment control circuit may support a current from the rectifier circuit through all of the segments in the string circuit at a peak of the rectified voltage and the energy storage circuit may charge the at least one energy storage device to a voltage near the peak of the rectified voltage.
    • 照明装置包括整流电路,其被配置为耦合到AC源并且从AC电压和包括至少两个串联连接的LED段的串产生整流电压并且耦合到整流器电路。 段控制电路被配置为响应于整流电压选择性地旁路串的至少一个段。 能量存储电路耦合到整流器电路并且控制至少一个能量存储装置与串之间的电流。 控制电路控制分段控制电路和能量存储电路。 分段控制电路可以支持来自整流电路的电流通过整流电压的峰值处的串电路中的所有段,并且能量存储电路可以将至少一个能量存储装置充电到接近峰值的电压 整流电压。
    • 29. 发明授权
    • Reduction of tool mode and drilling noise in acoustic LWD
    • 降低声学LWD中的工具模式和钻孔噪声
    • US09115568B2
    • 2015-08-25
    • US12568847
    • 2009-09-29
    • Wei HanJun ZhangPaul Boonen
    • Wei HanJun ZhangPaul Boonen
    • G01V1/46E21B47/01
    • E21B47/01G01V1/46
    • A downhole measurement tool includes at least one regular receiver and at least one reference receiver externally deployed on a tool body. The reference receiver is configured to be acoustically isolated from the borehole, for example, via an isolation structure including a high-impedance cap and a low-impedance gap. The reference receiver may be deployed in a linear array with the regular receiver(s) and may be substantially identical to the regular receiver(s) such that it has substantially the same sensitivity to tool mode signals and internal drilling noise as do the regular receivers. Received waveforms may be processed so as to remove tool mode arrivals and/or drilling noise.
    • 井下测量工具包括至少一个常规接收器和外部部署在工具主体上的至少一个参考接收器。 参考接收器被配置为与钻孔隔声隔离,例如通过包括高阻抗帽和低阻抗间隙的隔离结构。 参考接收机可以部署在具有常规接收机的线性阵列中,并且可以与常规接收机基本相同,使得其具有与工作模式信号和内部钻孔噪声基本相同的灵敏度,如常规接收机 。 可以处理接收的波形,以便去除工具模式到达和/或钻孔噪声。