Over the air microcontroller flash memory updates
    51.
    发明授权
    Over the air microcontroller flash memory updates 有权
    空中微控制器闪存更新

    公开(公告)号:US08320302B2

    公开(公告)日:2012-11-27

    申请号:US11738226

    申请日:2007-04-20

    CPC classification number: H04M11/002 H04Q9/00 H04Q2209/60 H04W8/245 H04W88/04

    Abstract: Techniques for over the air (OTA) microcontroller flash memory updates using a wireless network are disclosed herein. A control node first transmits the microcontroller flash memory update to all devices that can receive the message. Each packet of the message is relayed through multiple communication levels until all devices receive the packet. This starts with communications from the control node to each device node that has a direct communication path to the control node, which are referred to herein as “first level” device nodes. The first level device nodes then relay each communication to each other device node that has a direct communication path to the first level device nodes, which are referred to herein as “second level” device nodes. This process is repeated at each level of the wireless network until each of the plurality of device nodes has received the microcontroller flash memory update.

    Abstract translation: 本文公开了使用无线网络的空中(OTA)微控制器闪存更新技术。 控制节点首先将微控制器闪存更新发送到可以接收消息的所有设备。 消息的每个分组通过多个通信级别进行中继,直到所有设备接收到分组。 这从具有从控制节点到具有到控制节点的直接通信路径的每个设备节点的通信开始,这在本文中被称为第一级设备节点。 然后,第一级设备节点将每个通信中继到具有到第一级设备节点的直接通信路径的每个其他设备节点,这在本文中被称为第二级设备节点。 在无线网络的每个级别重复该过程,直到多个设备节点中的每一个已经接收到微控制器闪速存储器更新。

    Frequency hopping spread spectrum communications system
    53.
    发明授权
    Frequency hopping spread spectrum communications system 有权
    跳频扩频通信系统

    公开(公告)号:US06888876B1

    公开(公告)日:2005-05-03

    申请号:US10037357

    申请日:2001-12-21

    CPC classification number: H04B1/7156 H04B2001/71563 H04B2001/71566 H04L1/04

    Abstract: The present invention is directed to a frequency hopping spread spectrum transceiver. The transceiver includes a microcontroller; a transmitter having a voltage controlled oscillator, a direct digital synthesizer, and a power amplifier; and a receiver having an amplifier, a mixer, an IF amplifier, a demodulator, and a data slicer. When transmitting, the transmitter communicates a preamble over a predetermined number of preamble channels, and thereafter communicate groups of data bytes that each comprise a subset of the data message over a predetermined sequence of data channels. When receiving, the receiver investigates the predetermined number of preamble channels to search for the preamble, each of the predetermined number of preamble channels being associated with a predetermined number of data channels in each sequence of data channels. A number of bytes that comprises each group of data bytes is determined in accordance with a number of channels in the sequence of data channels and the predetermined number of times each byte of the data message is to be transmitted.

    Abstract translation: 本发明涉及一种跳频扩频收发信机。 收发器包括微控制器; 具有压控振荡器的发射机,直接数字合成器和功率放大器; 以及具有放大器,混频器,IF放大器,解调器和数据限幅器的接收器。 当发射时,发射机在预定数量的前导信道上通信前同步码,然后在预定的数据信道序列上传送每个包括数据消息子集的数据字节组。 在接收时,接收机调查预定数量的前同步码信道以搜索前同步码,预定数量的前导信道中的每一个与每个数据信道序列中的预定数量的数据信道相关联。 根据数据信道序列中的信道数目和数据消息的每个字节要发送的预定次数来确定包括每组数据字节的字节数。

    Current measurement methods and apparatus employing second harmonic
scaling
    56.
    发明授权
    Current measurement methods and apparatus employing second harmonic scaling 失效
    使用二次谐波缩放的当前测量方法和装置

    公开(公告)号:US5907241A

    公开(公告)日:1999-05-25

    申请号:US908208

    申请日:1997-08-07

    CPC classification number: G01R21/133 G01R19/2513

    Abstract: A method for measuring an AC current in a conductor in which a DC current also exists includes the steps of (A) obtaining a first AC current measurement; (B) obtaining a measure of a power factor, fundamental frequency component, and second harmonic component; and (C) adjusting the first AC current measurement in accordance with an error value to obtain a corrected current measurement. The error value is determined as a function of the power factor, fundamental frequency component, and second harmonic component.

    Abstract translation: 用于测量直流电流也存在的导体中的交流电流的方法包括以下步骤:(A)获得第一交流电流测量; (B)获得功率因数,基频分量和二次谐波分量的量度; 和(C)根据误差值调整第一AC电流测量值以获得校正的电流测量值。 误差值根据功率因数,基波分量和二次谐波分量来确定。

    Mutual inductance current transducer, method of making and electric
energy meter incorporating same
    58.
    发明授权
    Mutual inductance current transducer, method of making and electric energy meter incorporating same 失效
    互感电流传感器,制造方法和结合电能表的电能表

    公开(公告)号:US4887029A

    公开(公告)日:1989-12-12

    申请号:US170173

    申请日:1988-03-18

    CPC classification number: G01R15/181 G01R5/00 H01F2038/305

    Abstract: A mutual inductance differential current transducer employs a toroidal coil mounted coaxially and generally centrally of the length of an alternating current conductor wiht a conductive sheet therebetween surrounding the conductor and of substantially the same length and in insulated relationship from the conductor. The axial length of the coil is less than approximately one-third the length of the conductor, and the toroidal cross-section has a longer leg parallel to the axis of the conductor and a cross-sectional area eliminating the need for external capacitive and magnetic shielding. The coil is wound with an integer number of layers of the same number of turns per layer, the total number of turns being selected to produce a predetermined range of voltage levels of the analog voltage signal output of the coil, produced in response to and representative of the differential current flow through the conductor. The coil is wound utilizing only conventional toroidal coil winding controls with resultant winding defects in each layer producing corresponding abberations in the analog voltage signal output, the abberations of the respective such contributions for the corresponding, plural integer number of layers being substantially self-cancelling and thereby maintaining the substantially linear responsive character of the analog voltage signal output of the coil.

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