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公开(公告)号：US20140076545A1
公开(公告)日：2014-03-20
申请号：US14026677
申请日：2013-09-13
CPC分类号： E21B36/04 , E21B36/006 , E21B47/065 , E21B47/12
摘要： A hydrocarbon heating system comprises a surface control panel and a subsurface heating system, connected by an external power cable which also serves as the data communication link between the two parts. The subsurface heating system includes a heating element and two separate, thermally isolated temperature sensors. One thermal sensor, mounted near the heating element, monitors the temperature of the heating element. Another thermal sensor monitors the ambient temperature of fluid in the borehole. The temperature of the heating element may be varied to maintain an optimal well temperature for the production of hydrocarbons. Downhole electronics convert the thermal sensor outputs to digital data, and modulate the digital data onto a power cable that carries power from the surface to the heating element. A control system at the surface controls the heating element via nested control loops monitoring the temperatures of the borehole fluid and the heating element.
摘要翻译： 烃加热系统包括表面控制面板和地下加热系统，其通过外部电力电缆连接，外部电力线也用作两部分之间的数据通信链路。 地下加热系统包括加热元件和两个独立的热隔离温度传感器。 安装在加热元件附近的一个热敏传感器监测加热元件的温度。 另一个热传感器监测钻孔中流体的环境温度。 可以改变加热元件的温度以保持用于生产烃的最佳井温度。 井下电子设备将热传感器输出转换为数字数据，并将数字数据调制到从表面传递加热元件的电源线上。 表面上的控制系统通过监控井眼流体和加热元件的温度的嵌套控制回路来控制加热元件。
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公开(公告)号：US07054777B2
公开(公告)日：2006-05-30
申请号：US10949888
申请日：2004-09-25
IPC分类号： G06F19/00
CPC分类号： B60T17/228
摘要： The present invention discloses and claims a test device and method for testing a rail car brake system. The test device includes a pneumatic circuit and electronic circuit connecting a supply of test air to the rail car brake system being tested. The pneumatic and electronic circuits operate to selectively supply and vent the test air to or from the rail car brake system according to programmed instructions. The test device further includes a web server interface for communicating with a predetermined web page or other source external to the rail car brake system test device to retrieve and download additional programming instructions.
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3.发明授权Modular digital telephone system with fully distributed local switching and control 失效具有完全分布式局部切换和控制的模块化数字电话系统
公开(公告)号：US5151896A
公开(公告)日：1992-09-29
申请号：US586440
申请日：1990-09-21
CPC分类号： H04M9/025 , H04Q11/0407 , H04Q2213/13003 , H04Q2213/13093 , H04Q2213/13103 , H04Q2213/13107 , H04Q2213/13178 , H04Q2213/13292 , H04Q2213/13299 , H04Q2213/1332 , H04Q2213/13389
摘要： A distributed digital telephone system is provided wherein a plurality of telephone consoles have instant access to a plurality of telephone lines wherein in all of the connections within such a system are non-blocking. The system architecture is that of a reverse ratio PBX in which the number of lines exceed the number of consoles and each handset has a reserved time slot on time division multiplex (TDM) highways for internal node or group connections. Accordingly, each handset is guaranteed access to idle lines within any given switching node. The distributed architecture is distinguished from central processing where all call processing is directed through a centralized point. In this decentralized system, all signal conditioning, protection, sensing and control are provided by the resource interface with the TDM highways. Resource data reporting is continually provided to all the resources connected to the system that require it. Redundancy of critical resources is provided in such a manner that only the portion of the system where a fault occurs is disabled while the remainder of the system continues to operate.
摘要翻译： 提供了一种分布式数字电话系统，其中多个电话控制台具有对多个电话线的即时访问，其中在该系统内的所有连接都是非阻塞的。 系统架构是反向比率PBX，其中线路数量超过控制台数量，并且每个手机在用于内部节点或组连接的时分复用（TDM）高速公路上具有保留的时隙。 因此，每个手机被保证访问任何给定交换节点内的空闲线路。 分布式架构与所有呼叫处理通过集中点指向的中央处理区分开来。 在这种分散的系统中，所有信号调理，保护，感测和控制都是通过与TDM高速公路的资源接口来提供的。 资源数据报告不断地提供给连接到需要系统的所有资源。 以这样的方式提供关键资源的冗余，使得只有系统的发生故障的部分被禁用，同时系统的其余部分继续运行。
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