公开(公告)号：US5553095A

公开(公告)日：1996-09-03

申请号：US54582

申请日：1993-04-28

申请人： Jonathan R. Engdahl ,  David J. Gee ,  Mark A. Lucak ,  Shawn L. Adams

发明人： Jonathan R. Engdahl ,  David J. Gee ,  Mark A. Lucak ,  Shawn L. Adams

IPC分类号： G05B19/042 ,  H04L12/417 ,  H04B1/38 ,  H04J3/02

CPC分类号： H04L12/40013 ,  G05B19/0421 ,  H04L12/40143 ,  H04L12/4035 ,  H04L12/40026 ,  H04L12/407

摘要： A digital communication network carries high and low priority data. The network stations that produce high priority data are assigned to a first group of stations and stations that produce low priority data are assigned to a second group with the two group not being mutually exclusive. Activity on the network is divided into periodic intervals of the same duration. Network control information, that defines how access to the medium, is determined is broadcast to all stations during a first segment of a periodic interval. The network control information defines the length of the periodic interval and of the periodic interval segments, and defines how many stations are in each group. Then during a second segment of the periodic interval, every station in the first group is afforded an opportunity, in a predefined order, to transmit high priority data over the medium. Stations in the second group are afforded an opportunity to transmit low priority data, when time remains after the first segment in a periodic interval before the network control information will be transmitted again. The specific station in the second group which is afforded an opportuinity to transmit first changes from periodic interval to periodic interval.

摘要翻译： 数字通信网络承载高优先级数据和低优先级数据。 产生高优先级数据的网络站被分配给第一组站，并且产生低优先级数据的站被分配给具有两个组不相互排斥的第二组。 网络上的活动划分为相同持续时间的周期性间隔。 在定期间隔的第一段期间，广播所有站的网络控制信息，其定义如何访问介质。 网络控制信息定义周期性间隔和周期性间隔段的长度，并定义每组中的站数。 然后在周期性间隔的第二段期间，第一组中的每个站以预定义的顺序提供通过介质传送高优先级数据的机会。 在再次发送网络控制信息之前，第二组中的站点可以传送低优先级数据，时间保持在第一段之后的周期性间隔。 第二组中的特定站提供了从周期性间隔向周期性间隔发送第一次更改的机会。

公开(公告)号：US5283869A

公开(公告)日：1994-02-01

申请号：US384614

申请日：1989-07-25

申请人： Shawn L. Adams ,  Jonathan R. Engdahl

发明人： Shawn L. Adams ,  Jonathan R. Engdahl

IPC分类号： H04L29/04 ,  G06F13/24 ,  H04L29/06 ,  G06F9/00 ,  H04J3/24

CPC分类号： G06F13/24

摘要： A communications interface circuit couples a host processor to a pair of serial communications links. A shared memory is employed to pass message data and network management data between the host and the interface circuit, and each can interrupt the other through interrupt control lines. The shared memory stores a handshake segment that includes interrupt flags and acknowledge flags which enable a large number of different interrupt events to be efficiently serviced.

摘要翻译： 通信接口电路将主处理器耦合到一对串行通信链路。 共享存储器用于在主机和接口电路之间传递消息数据和网络管理数据，并且每个都可以通过中断控制线中断另一个。 共享存储器存储包括中断标志和确认标志的握手段，其使得能够有效地维护大量不同的中断事件。

公开(公告)号：US5452420A

公开(公告)日：1995-09-19

申请号：US879732

申请日：1992-05-06

申请人： Jonathan R. Engdahl ,  Shawn L. Adams

发明人： Jonathan R. Engdahl ,  Shawn L. Adams

IPC分类号： H04L29/04 ,  G06F13/12 ,  G06F13/38 ,  H04L29/10 ,  G06F13/14 ,  G06F13/24

CPC分类号： G06F13/385 ,  G06F13/128

摘要： A communications interface circuit couples a host processor to a pair of serial communications links, During power-up the interface circuit negotiates a set of operating parameters with the host processor through a shared memory to establish the optimal conditions under which message data is to be exchanged between the serial communications links and the host processor.

摘要翻译： 通信接口电路将主处理器耦合到一对串行通信链路。在上电期间，接口电路通过共享存储器与主处理器协商一组操作参数，以建立消息数据要被交换的最佳条件 在串行通信链路和主机处理器之间。

公开(公告)号：US06788049B2

公开(公告)日：2004-09-07

申请号：US10328293

申请日：2002-12-23

申请人： Jonathan R. Engdahl ,  Ira B. Goldberg

发明人： Jonathan R. Engdahl ,  Ira B. Goldberg

IPC分类号： G01N2772

CPC分类号： G08B13/2408 ,  G08B13/2442 ,  G08B13/2471

摘要： A detector for magnetizable materials operates remotely to determine a amplitude and phase modification of an exciting magnetic field caused by the magnetizable materials. These amplitude and phase measurements are used to create a phase-amplitude trajectory in phase amplitude space, which may be finely divided to distinguish among a number of different types of components.

摘要翻译： 用于可磁化材料的检测器远程操作以确定由可磁化材料引起的激励磁场的振幅和相位变化。 这些幅度和相位测量用于在相位幅度空间中产生相位幅度轨迹，该相位幅度轨迹可以被细分，以区分多种不同类型的分量。

公开(公告)号：US06278368B1

公开(公告)日：2001-08-21

申请号：US09409331

申请日：1999-09-30

申请人： Ira B. Goldberg ,  Ted M. McKinney ,  Charles S. Hollingsworth ,  Jonathan R. Engdahl ,  Elik I. Fooks

发明人： Ira B. Goldberg ,  Ted M. McKinney ,  Charles S. Hollingsworth ,  Jonathan R. Engdahl ,  Elik I. Fooks

IPC分类号： G08B1314

CPC分类号： G08B13/2411 ,  G08B13/2442 ,  G08B13/2445 ,  G08B13/2471 ,  G08B13/2485

摘要： Multiple bits of information may be conveyed by passive target material incorporating filaments of magnetizable material having different magnetization functions and, in particular, different coercivities. Detection of the presence or absence of the individual filaments may be done remotely by measuring induced flux B as a function of an externally imposed magnetic field waveform and subjecting the measured induced flux signal to differentiation or Fourier transform techniques.

摘要翻译： 可以通过包含具有不同磁化功能，特别是不同矫顽力的可磁化材料的长丝的被动目标材料传送多个位信息。 可以通过测量作为外部施加的磁场波形的函数的感应通量B来远程检测单个细丝的存在或不存在，并将测量的感应通量信号进行微分或傅里叶变换技术。

公开(公告)号：US5537549A

公开(公告)日：1996-07-16

申请号：US54323

申请日：1993-04-28

申请人： David J. Gee ,  Mark A. Lucak ,  Jonathan R. Engdahl ,  Timothy Siorek

发明人： David J. Gee ,  Mark A. Lucak ,  Jonathan R. Engdahl ,  Timothy Siorek

IPC分类号： G05B19/042 ,  H04L12/417 ,  G06F13/372 ,  H04J3/16

CPC分类号： H04L12/40032 ,  G05B19/0421 ,  H04L12/4035 ,  H04L12/417 ,  H04L12/40026 ,  H04L12/407 ,  H04L2012/4026

摘要： Activity on a digital communication network is divided into periodic intervals and during a segment of each periodic interval a moderator station broadcasts a numerical count of the periodic intervals to all stations on the network. Each station has a memory in which a numerical value is stored, and a comparator that compares the numerical value to the numerical count received from the network. When the numerical count of the periodic intervals equals the numerical value, an apparatus within the station performs a defined operation, such as transmitting a message over the network or synchronizing a clock in the station to a master time standard. The equality of the periodic interval count and the numerical value also can be used to determine when to signal an external device. By using the count of the periodic intervals in this manner, the operation of several stations on the network can be coordinated.

摘要翻译： 数字通信网络上的活动被划分为周期性间隔，并且在每个周期性间隔的段期间，主持人站向网络上的所有站广播周期性间隔的数字计数。 每个站具有存储数值的存储器，以及将数值与从网络接收的数值进行比较的比较器。 当周期性间隔的数值等于数值时，站内的装置执行定义的操作，例如通过网络发送消息或将站中的时钟同步到主时间标准。 周期性间隔计数和数值的相等也可以用于确定何时向外部设备发信号。 通过以这种方式使用周期性间隔的计数，可以协调网络上的几个站的操作。

公开(公告)号：US5493571A

公开(公告)日：1996-02-20

申请号：US54400

申请日：1993-04-28

申请人： Jonathan R. Engdahl ,  Michael A. Bush ,  Lawrence W. Esker ,  Mark A. Lucak ,  David J. Gee

发明人： Jonathan R. Engdahl ,  Michael A. Bush ,  Lawrence W. Esker ,  Mark A. Lucak ,  David J. Gee

IPC分类号： H04L7/04 ,  H04L7/10 ,  H04L12/417 ,  H04L25/49 ,  H04L29/06 ,  H04J3/06 ,  H04L7/00

CPC分类号： H04L12/4035 ,  H04L12/417 ,  H04L25/4904 ,  H04L29/06 ,  H04L7/041 ,  H04L12/407 ,  H04L7/10

摘要： A node circuit is operative to couple Manchester encoded data between a transmission medium and an associated electrical device. A first mechanism detects a message frame preamble having a pattern of alternating signal level of substantially identical duration, and a second mechanism that detects a start delimiter in the message frame. The start delimiter has a plurality of binary signal levels in a unique pattern that satisfies a defined set of criteria to optimize the probability that the pattern will be detected while minimizing the likelihood that random valid data will alias into the start delimiter pattern. A data decoder is provided to convert the Manchester encoded data into binary data which then is sent via a signal path to the associated electrical device. Another mechanism is included to detect a unique end delimiter that signals the termination of the message frame.

摘要翻译： 节点电路可操作以在传输介质和相关联的电气设备之间耦合曼彻斯特编码数据。 第一机制检测具有基本相同持续时间的交替信号电平的模式的消息帧前同步码，以及检测消息帧中的起始定界符的第二机制。 起始分隔符具有独特模式中的多个二进制信号电平，其满足定义的准则集以优化将被检测到模式的概率，同时使随机有效数据将别名到起始定界符模式的可能性最小化。 提供数据解码器以将曼彻斯特编码的数据转换成二进制数据，然后将其经由信号路径发送到相关联的电气设备。 包括另一种机制来检测信号终止消息帧的唯一终结分隔符。

公开(公告)号：US4667323A

公开(公告)日：1987-05-19

申请号：US771834

申请日：1985-09-03

申请人： Jonathan R. Engdahl ,  Jeffery A. Hanneman ,  David C. Sweeton

发明人： Jonathan R. Engdahl ,  Jeffery A. Hanneman ,  David C. Sweeton

IPC分类号： H04L12/417 ,  H04J3/02

CPC分类号： H04L12/417

摘要： A communications network is comprised of two or more stations which share mastership of the network by passing a token between them. While a station holds the token it may send low or high priority messages. It may also inform other stations of its intent to exit the network and it may solicit for new stations wanting to enter the network. The token is passed from station-to-station in accordance with a predetermined time schedule which insures each station fair access to the network while insuring that messages are conveyed between stations within a predetermined worst case time delay.

公开(公告)号：US07581053B2

公开(公告)日：2009-08-25

申请号：US10579400

申请日：2004-11-16

申请人： Gregg M. Sichner ,  Robert J. Kretschmann ,  Jonathan R. Engdahl ,  Ram Pai ,  Jianguo Zhuang ,  Qing Jia ,  David D. Brandt

发明人： Gregg M. Sichner ,  Robert J. Kretschmann ,  Jonathan R. Engdahl ,  Ram Pai ,  Jianguo Zhuang ,  Qing Jia ,  David D. Brandt

IPC分类号： G06F13/00

CPC分类号： G06F13/409 ,  H04W84/10 ,  H04W88/04

摘要： A distributed modular input/output system includes a primary wireless device adapted to be operatively connected to an associated industrial controller. A secondary wireless device is physically disconnected from the primary wireless device. The secondary wireless device is operatively connected to the primary wireless device by a primary wireless backplane link. At least one input/output module is operatively connected the secondary wireless device. An associated field device can be connected to the at least one input/output module for communication with the associated industrial controller via the secondary wireless device, the primary wireless backplane link, and the primary wireless device. Typically, a plurality of the secondary wireless devices are physically disconnected from the primary wireless device and each includes one or more of the input/output modules operably connected thereto. Each of the secondary wireless devices is operatively connected to the primary wireless device by a respective plurality of primary wireless backplane links.

摘要翻译： 分布式模块化输入/输出系统包括适于可操作地连接到相关联的工业控制器的主无线设备。 辅助无线设备在物理上与主无线设备断开连接。 辅助无线设备通过主无线背板链路可操作地连接到主无线设备。 至少一个输入/输出模块可操作地连接到次级无线设备。 相关联的现场设备可以连接到至少一个输入/输出模块，用于经由辅助无线设备，主无线背板链路和主要无线设备与相关联的工业控制器通信。 通常，多个次级无线设备在物理上与主无线设备断开连接，并且每个都包括与其可操作地连接的一个或多个输入/输出模块。 每个辅助无线设备通过相应的多个主无线背板链路可操作地连接到主无线设备。

公开(公告)号：US06269414B1

公开(公告)日：2001-07-31

申请号：US09115121

申请日：1998-07-14

申请人： Jonathan R. Engdahl

发明人： Jonathan R. Engdahl

IPC分类号： G06F1314

CPC分类号： G06F13/4217

摘要： High data rate I/O modules may be placed on a synchronous bus used also with legacy low data rate I/O modules without rendering the latter modules incompatible and without changing the clock rate of the bus by interleaving extended data to be read at falling edges of the clock with conventional data for the legacy modules to be read at rising edges of the clock. High data rate modules read both extended and conventional data effectively doubling the data transmission rate.

摘要翻译： 高数据速率I / O模块可以放置在同时使用的传统低数据速率I / O模块的同步总线上，而不会使后者的模块不兼容，并且不会通过交织要在下降沿读取的扩展数据来改变总线的时钟速率 的时钟与传统模块的传统数据在时钟的上升沿被读取。 高数据速率模块读取扩展和常规数据有效地使数据传输速率加倍。