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1.发明授权Communication network with time coordinated station activity by time slot and periodic interval number 失效具有通过时隙和周期间隔数的时间协调站活动的通信网络
公开(公告)号：US5537549A
公开(公告)日：1996-07-16
申请号：US54323
申请日：1993-04-28
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。
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2.发明授权Method and apparatus for exchanging different classes of data during different time intervals 失效用于在不同时间间隔内交换不同类别数据的方法和装置
公开(公告)号：US5553095A
公开(公告)日：1996-09-03
申请号：US54582
申请日：1993-04-28
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。
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公开(公告)号：US5471461A
公开(公告)日：1995-11-28
申请号：US54581
申请日：1993-04-28
IPC分类号： G05B19/042 , H04L12/24 , H04L12/407
CPC分类号： H04L12/4035 , G05B19/0421 , H04L12/24 , H04L41/00 , H04L12/407
摘要： A moderator on a communication network periodically transmits a set of parameters for a protocol that is used to communicate over the network. Each node on the network compares the set of protocol parameters from the moderator to a set of parameters stored in that node. If the sets of parameters at a given node do not match, that given node ceases transmitting messages over the network until either the set of protocol parameters from the moderator match the stored set of parameters, or a matching set of parameters is stored in the node. Typically the active node that is assigned the lowest numerical network address functions as the moderator. However, an automatic process is utilized to prevent a node with a non-matching set of the protocol parameters from becoming the moderator for more than a brief period of time. An override procedure is provided to force all the nodes on the network to adopt a common set of protocol parameters in the event that the automatic process fails.
摘要翻译： 通信网络上的主持人周期性地发送用于通过网络通信的协议的一组参数。 网络上的每个节点将来自主持人的协议参数集合与存储在该节点中的一组参数进行比较。 如果给定节点上的参数集合不匹配，则该给定节点停止通过网络发送消息，直到来自主持人的一组协议参数与存储的参数集匹配，或者将一组匹配的参数存储在节点中 。 通常，分配最低数字网络地址的主动节点用作主持人。 然而，使用自动处理来防止具有协议参数的不匹配集合的节点在短时间内成为主持人。 在自动进程失败的情况下，提供覆盖程序以强制网络上的所有节点采用一组公共协议参数。
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公开(公告)号：US5400331A
公开(公告)日：1995-03-21
申请号：US54944
申请日：1993-04-28
CPC分类号： H04L29/06
摘要： Each message carried by a communication network has a packet that contains data, a tag, and a generation count wherein duplicate packets sent in different messages have identical generation counts. A station includes a modem that connects to the communication network in order to receive messages. A fixed screener circuit has a first memory that stores a set of tag values and a fixed screener determines when a packet tag matches a tag value in the first memory. The station also has an interface through which tag values are received from an external device, such as a host computer. A general purpose screener includes a second memory with a plurality of storage locations in which to store tag values from the interface and a generation count associated with each tag value. A first comparator in the general purpose screener determines when a tag contained in a packet matches a tag value in the second memory, and a second comparator determines when a generation count in the packet matches the generation count in the second memory that is associated with the matching tag value. A control circuit produces a signal when the first comparator indicates a tag match and the second comparator indicates that the generation counts do not match. The station ignores the packet in the absence of the signal.
摘要翻译： 由通信网络携带的每个消息具有包含数据，标签和生成计数的分组，其中在不同消息中发送的重复分组具有相同的生成计数。 站点包括连接到通信网络以便接收消息的调制解调器。 固定筛选器电路具有存储一组标签值的第一存储器，并且固定筛选器确定分组标签何时与第一存储器中的标签值匹配。 该站还具有从诸如主机的外部设备接收标签值的接口。 通用筛选器包括具有多个存储位置的第二存储器，其中存储来自接口的标签值和与每个标签值相关联的生成计数。 通用筛选器中的第一比较器确定包含在分组中的标签何时与第二存储器中的标签值匹配，并且第二比较器确定分组中的生成计数何时与第二存储器中的生成计数匹配， 匹配标签值。 当第一比较器指示标签匹配并且第二比较器指示生成计数不匹配时，控制电路产生信号。 在没有信号的情况下，电台忽略数据包。
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5.发明授权Apparatus and method for digital communications with improved delimiter detection 失效用于具有改进的定界符检测的数字通信的装置和方法
公开(公告)号：US5493571A
公开(公告)日：1996-02-20
申请号：US54400
申请日：1993-04-28
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。
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公开(公告)号：US07441611B2
公开(公告)日：2008-10-28
申请号：US10548584
申请日：2004-03-15
IPC分类号： E21B10/38
CPC分类号： B25D17/24 , B25D17/265 , B25D2216/0023 , B25D2222/72
摘要： A pneumatic rockdrill having a housing; a cylinder connected to a compressed air supply inlet by a set of air passages; an impact piston, at least part of which is reciprocable within the cylinder; and a controller for the supply of compressed air from the air supply inlet to the cylinder. At least one pair of contact surfaces are located at the interface between the piston and the cylinder, where those relatively moving parts contact one another. At least one water supply inlet and water paths connected to the water supply inlet(s) are configured so as in operation to convey water to a drilling tool to flush a hole being drilled, and to supply water to wet the contact surfaces.
摘要翻译： 一种具有壳体的气动钻石; 通过一组空气通道连接到压缩空气供应入口的气缸; 冲击活塞，其至少一部分在气缸内往复运动; 以及用于从空气供应入口向气缸供应压缩空气的控制器。 至少一对接触表面位于活塞和气缸之间的界面处，其中这些相对移动的部件彼此接触。 至少一个供水入口和连接到供水入口的水路被构造成在操作中将水输送到钻孔工具以冲洗被钻孔，并且供水以润湿接触表面。
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公开(公告)号：US06226555B1
公开(公告)日：2001-05-01
申请号：US09079010
申请日：1998-05-14
申请人： Chuck E. Kallal , Mike W. Messick , Kevin P. Aretha , Jason A. McLees , David J. Gee , Richard L. Mahn , Don C. Stokes
发明人： Chuck E. Kallal , Mike W. Messick , Kevin P. Aretha , Jason A. McLees , David J. Gee , Richard L. Mahn , Don C. Stokes
IPC分类号： G05B1101
CPC分类号： G05B19/056 , G05B2219/13078 , G05B2219/13108
摘要： A software logic controller using flowchart programming includes exception handling elements for handling exception conditions in a manufacturing process. Exception handling is programmed using a Begin Exception element to start monitoring the occurrence of a specific exception condition and an End Exception element to stop the monitoring process. Monitoring is conducted once during every scan cycle of the computer as long as the Begin Exception element is still active.
摘要翻译： 使用流程图编程的软件逻辑控制器包括用于处理制造过程中的异常情况的异常处理元件。 使用Begin Exception元素编程异常处理，以开始监视特定异常情况的发生和End Exception元素以停止监视进程。 只要Begin Exception元素仍处于活动状态，监控在计算机的每个扫描周期中进行一次。
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公开(公告)号：US4658245A
公开(公告)日：1987-04-14
申请号：US490010
申请日：1983-04-29
IPC分类号： G05B19/4065
CPC分类号： G05B19/4065 , G05B2219/34491 , G05B2219/37337 , G05B2219/37493
摘要： An apparatus and method for tool condition and failure monitoring system for predicting imminent tool failure by sensing acoustic emissions from a cutting operation converting the emissions into an electrical signal filtering the electrical signal and using a "count rate" technique on the filtered signal to generate a signal indicative of imminent failure. To improve the prediction, the filtering includes removal of low frequency and d.c. signals and the imminent failure is indicated only after several successive periods of a triggering level of count rate.
摘要翻译： 一种用于工具状态和故障监测系统的装置和方法，用于通过感测来自切割操作的声发射来将所述发射转换成过滤所述电信号的电信号并且对所述滤波信号使用“计数速率”技术来生成 表示即将发生故障的信号。 为了改进预测，滤波包括去除低频和直流。 信号，并且即将发生的故障仅在几个连续的触发级别的计数率之后才被指示。
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公开(公告)号：US06196789B1
公开(公告)日：2001-03-06
申请号：US09184737
申请日：1998-11-02
IPC分类号： F04D2942
CPC分类号： F04D27/0215 , F04D29/4213 , F04D29/685 , Y10S415/914
摘要： An MWE compressor comprising a housing defining an inlet and an outlet, and an impeller wheel rotatably mounted in the housing such that on rotation of the wheel gas within the inlet is moved to the outlet. The housing has an inner wall defining a surface located in close proximity to radially outer edges of vanes supported by the wheel. The inlet is defined by a first tubular portion an inner surface of which is an extension of the said surface of the inner wall of the housing, a second tubular portion located radially outside the first portion to define an annular passage between the first and second portions, a wall extending across the annular passage between the first and second portions, and a conical wall located upstream of the first portion and extending in the radially outwards and upstream directions from adjacent the upstream end of the first portion to the upstream end of the second portion. At least one aperture is defined between the downstream end of the conical wall and the upstream end of the first tubular portion to communicate with the annular passage. At least one aperture is defined adjacent the wheel in the surface of the inner wall of the housing to communicate with the annular passage. The apertures are located on opposite sides of the wall extending across the annular passage, and at least one further aperture is provided in that wall.
摘要翻译： 一种MWE压缩机，包括限定入口和出口的壳体和可旋转地安装在壳体中的叶轮，使得在入口内的轮气旋转移动到出口。 壳体具有限定靠近由轮支撑的叶片的径向外边缘附近的表面的内壁。 入口由第一管状部分限定，第一管状部分的内表面是壳体的内壁的所述表面的延伸部，第二管状部分位于第一部分的径向外侧，以在第一和第二部分之间限定环形通道 ，延伸穿过第一和第二部分之间的环形通道的壁，以及位于第一部分上游并且沿径向向外和上游方向从邻近第一部分的上游端延伸到第二部分的上游端的锥形壁 一部分。 至少一个孔口限定在锥形壁的下游端和第一管状部分的上游端之间以与环形通道连通。 在壳体的内壁的表面中邻近轮子限定出至少一个孔，以与环形通道连通。 孔位于延伸穿过环形通道的壁的相对侧上，并且在该壁中设置至少一个另外的孔。
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