公开(公告)号：US07009375B1

公开(公告)日：2006-03-07

申请号：US09412440

申请日：1999-10-05

申请人： David E. Vokey ,  Kenneth N. Sontag ,  Myron Loewen

发明人： David E. Vokey ,  Kenneth N. Sontag ,  Myron Loewen

IPC分类号： G01R19/00

CPC分类号： G01R31/021

摘要： A constant current termination is provided for cable locating tones on communication and control cables that may be buried or placed in underground duct structures. The constant current termination limits the current on each branch of the cable to that required for cable location, thus ensuring that branches furthest from the tone source have adequate current for location purposes. The termination is the same for each branch, regardless of its position along the cable system. This eliminates the need to calibrate and recalibrate termination distances for a cable on installation and when branches are added. It also allows the location of damaged cables where the tone signal strength on a damaged branch is less than that for which the termination was designed.

摘要翻译： 为可能被埋置或放置在地下管道结构中的通信和控制电缆上的电缆定位音提供恒定电流端接。 恒定电流终端将电缆的每个分支上的电流限制为电缆位置所需的电流，从而确保离音源最远的分支具有足够的电流用于位置目的。 终端对于每个分支是相同的，不管其沿着电缆系统的位置如何。 这样就无需校准和重新校准电缆在安装时和分支机构的终端距离。 它还允许损坏电缆的位置，其中损坏的分支上的音调信号强度小于终端设计的音调信号强度。

公开(公告)号：US5262639A

公开(公告)日：1993-11-16

申请号：US868658

申请日：1992-04-15

申请人： David E. Vokey ,  Kenneth N. Sontag ,  Heinrich Kraft

发明人： David E. Vokey ,  Kenneth N. Sontag ,  Heinrich Kraft

IPC分类号： G01M3/04 ,  G01M11/00 ,  G08B13/186 ,  G08C23/06 ,  H01J5/16 ,  G08B21/00

CPC分类号： G01M11/33 ,  G01M3/047 ,  G08B13/186 ,  G08C23/06

摘要： The invention provides a monitor for monitoring the condition of fibre optic communication cables. The system employs one or more of the optical fibres of a cable to monitor the cable structure for damage or kinks. By using two separate laser sources and simultaneously monitoring the optical losses at two distinct and separate wavelengths, the loss signature of the monitored fibre is determined, analyzed and related to the mechanical condition of the cable structure. To monitor splice points for moisture, a special optical splice sensor unit detects any penetration of water into the splice and transmits a coded alarm signal over the monitored fibre to the optical receiver. Every splice location is assigned a unique sensor code. The optical splice sensor is driven by moisture detection cell, which forms a single cell water activated battery. Water entering the monitored splice closure wets the tape, which activates the cell. The cell generates sufficient voltage and current to power timing, code generation and modulator circuits in the sensor unit for an extended period of time. The activated circuit drives a modulator which modulates the light travelling down the fibre. The modulated light is monitored at the equipment office and the address of the alarming sensor decoded.

摘要翻译： 本发明提供了一种用于监视光纤通信电缆的状况的监视器。 该系统采用电缆的一根或多根光纤来监测电缆结构是否损坏或扭结。 通过使用两个单独的激光源并同时监测在两个不同和分离的波长处的光学损耗，所监测的光纤的损耗特征被确定，分析并且与电缆结构的机械状态相关。 为了监测接合点的湿度，特殊的光接头传感器单元检测水进入接头的任何穿透，并将经过监视的光纤的编码报警信号传输到光接收机。 每个拼接位置都被分配一个唯一的传感器代码。 光接头传感器由水分检测电池驱动，形成单电池水活化电池。 进入受监视的接头闭合的水浸湿磁带，激活电池。 电池产生足够的电压和电流，以长时间为传感器单元中的定时，代码生成和调制器电路供电。 激活的电路驱动调制器，其调制沿着光纤行进的光。 调制光在设备办公室进行监控，报警传感器的地址被解码。

公开(公告)号：USD402958S

公开(公告)日：1998-12-22

申请号：US80062

申请日：1997-11-26

申请人： Kenneth N. Sontag

设计人： Kenneth N. Sontag

公开(公告)号：US5708364A

公开(公告)日：1998-01-13

申请号：US510239

申请日：1995-08-02

申请人： David E. Vokey ,  Kenneth N. Sontag ,  Gilles Aminot

发明人： David E. Vokey ,  Kenneth N. Sontag ,  Gilles Aminot

IPC分类号： G01R31/02 ,  H04M3/28 ,  H04B3/46

CPC分类号： H04M3/28 ,  G01R31/021

摘要： A novel method and apparatus are used for monitoring cables for wear and damage. The system is particularly applicable to a cable system with multiple branch terminations. The cables have detection conductors, for example the metal cable jackets or other detection conductors extending the length of the conductors. These are connected electrically at the splice points in the system. At the end of each branch and at the end of the main cable, the detection conductors are each connected to a novel termination circuit. In the normal monitoring mode, the termination circuit appears as an open circuit. A DC voltage is normally applied to the detection conductors. Any current is a result of current leakage at a resistive fault along the detection conductors. The termination circuits are activated by altering the DC voltage, e.g. by reversing the polarity and increasing the magnitude of the voltage. This causes the termination circuit to perform a series of functional tests. These include a loop test which places a short across the end of the detection conductor for a timed period. The resulting high level loop current is used to calculate the total detection conductor resistance. A second test transmits a coded signal simulating a triggered splice sensor unit. The signal is detected and decoded to verify proper operation of end to end coded signaling after completing a test cycle, the termination circuit turns off and the next termination to be tested is addressed.

摘要翻译： 一种新颖的方法和装置用于监测电缆的磨损和损坏。 该系统特别适用于具有多个分支终端的电缆系统。 电缆具有检测导体，例如金属电缆护套或延伸导体长度的其他检测导体。 这些在系统中的接合点处电连接。 在每个分支的末端和主电缆的末端，检测导体各自连接到新的终端电路。 在正常监控模式下，终端电路显示为开路。 直流电压通常被施加到检测导体。 任何电流都是沿着检测导体的电阻故障下的电流泄漏的结果。 通过改变直流电压来激活终端电路，例如， 通过反转极性并增加电压的大小。 这导致终端电路执行一系列功能测试。 这些包括一个循环测试，其在检测导体的末端放置短时间段。 所得到的高电平回路电流用于计算总检测导体电阻。 第二个测试发送模拟触发的接头传感器单元的编码信号。 在完成测试周期之后，对信号进行检测和解码以验证端对端编码信号的正确操作，终端电路关闭，下一个要测试的终端被寻址。

公开(公告)号：US4947469A

公开(公告)日：1990-08-07

申请号：US293288

申请日：1989-01-04

申请人： David E. Vokey ,  Kenneth N. Sontag ,  John C. Chamberlain ,  Ronald L. Lavallee

发明人： David E. Vokey ,  Kenneth N. Sontag ,  John C. Chamberlain ,  Ronald L. Lavallee

IPC分类号： G01R31/08

CPC分类号： G01R31/088

摘要： A resistive fault in an electrical cable is located by applying a DC voltage to one end of the faulted cable conductor. The steady state DC voltage and current are measured at the end of the conductor where the voltage is applied. Simultaneously, the DC voltage is measured at the other end of the cable. The voltage is then reversed in polarity and the measurements repeated. Several repetitions of this procedure at each end of the conductor yields sufficient information to compute the location of the fault with reasonable accuracy. The procedure is carried out using two computer-based units, one at each end of the cable, with the two units communicating over the conductor under test.

公开(公告)号：US5990686A

公开(公告)日：1999-11-23

申请号：US666628

申请日：1996-06-18

申请人： David E. Vokey ,  Kenneth N. Sontag ,  Gilles Aminot

发明人： David E. Vokey ,  Kenneth N. Sontag ,  Gilles Aminot

IPC分类号： G01R31/08

CPC分类号： G01R31/088

摘要： A resistive fault location method and apparatus are used on communication and power cables. Two instruments are connected to opposite ends of the faulted conductor. Each takes a series of voltage and current measurements that are then processed to determine the distance from each end of the conductor to the fault. To eliminate voltage and current transients, the data collected is statistically analyzed and data that is analyzed as being affected by transients is discarded. The remaining data is taken as being steady state data. This eliminates any requirement for simultaneous measurements at opposite ends of the conductor and accounts for any situation where local transients at the two ends of the conductor are different at any given instant.

摘要翻译： 通信和电力电缆使用电阻故障定位方法和装置。 两个仪器连接到故障导体的相对端。 每个采取一系列电压和电流测量，然后进行处理，以确定从导体的每一端到故障的距离。 为了消除电压和电流瞬变，对收集的数据进行统计分析，并将被分析为受瞬态影响的数据丢弃。 其余数据作为稳态数据。 这消除了在导体的相对端处同时进行测量的任何要求，并且考虑到导体两端的局部瞬变在任何给定时刻不同的任何情况。

公开(公告)号：US5793590A

公开(公告)日：1998-08-11

申请号：US878182

申请日：1997-06-18

申请人： David E. Vokey ,  Kenneth N. Sontag ,  John C. Chamberlain ,  Oleh J. Sniezko

发明人： David E. Vokey ,  Kenneth N. Sontag ,  John C. Chamberlain ,  Oleh J. Sniezko

IPC分类号： H02H3/12 ,  H02H3/17 ,  H02H7/22 ,  H04N7/10 ,  H02H3/18

CPC分类号： H02H3/12 ,  H02H3/17 ,  H04N7/102 ,  H02H7/228

摘要： A coaxial drop cable safety device is used for cable television, data and telephony applications. The device is used on buried drop cable where 60 Hz powering voltages applied to the drop cable exceed low voltage safety limits and where the drop cable is buried at depths which is less than the minimum required to meet electrical safety codes. Tap end and premise end units are connected to the drop cable. The tap end unit applies a DC voltage to the center conductor of the drop cable. A monitoring circuit in the tap end unit monitors the center conductor DC voltage to a fault from the center conductor to ground along the drop cable. The tap unit will immediately remove the powering voltage In the event of either an open or faulted condition on the center conductor along the entire length of the drop cable. Additionally, while providing fault protection for the low frequency powering circuit due to tampering or damage to the cable, the fault monitoring circuit allows the high frequency television, data and telephony signals to pass with little or no impediment.

摘要翻译： 同轴放电电缆安全装置用于有线电视，数据和电话应用。 该器件用于埋地滴电缆，其中施加到分支电缆的60Hz供电电压超过低电压安全限值，并且放电电缆被埋在小于满足电气安全规范要求的最小值的深度。 抽头端和前端单元连接到分接电缆。 分接头单元对分接电缆的中心导体施加直流电压。 分接头单元中的监控电路通过分接电缆监测从中心导体到地面的故障的中心导体直流电压。 分接单元将立即消除供电电压。在沿导线整个长度的中心导体处于打开或故障状态的情况下。 另外，由于篡改或损坏电缆，为低频供电电路提供故障保护，故障监控电路允许高频电视，数据和电话信号通过很少或没有障碍。

公开(公告)号：US5349182A

公开(公告)日：1994-09-20

申请号：US152368

申请日：1993-11-16

申请人： David E. Vokey ,  Kenneth N. Sontag ,  Heinrich Kraft

发明人： David E. Vokey ,  Kenneth N. Sontag ,  Heinrich Kraft

IPC分类号： G01M3/04 ,  G01M11/00 ,  G08B13/186 ,  G08C23/06 ,  G01V9/04

CPC分类号： G01M11/33 ,  G01M3/047 ,  G08B13/186 ,  G08C23/06

摘要： The invention provides a monitor for monitoring the condition of fibre optic communication cables. The system employs one or more of the optical fibres of a cable to monitor the cable structure for damage or kinks. By using two separate laser sources and simultaneously monitoring the optical losses at two distinct and separate wavelengths, the loss signature of the monitored fibre is determined, analyzed and related to the mechanical condition of the cable structure. To monitor splice points for moisture, a special optical splice sensor unit detects any penetration of water into the splice and transmits a coded alarm signal over the monitored fibre to the optical receiver. Every splice location is assigned a unique sensor code. The optical splice sensor is driven by moisture detection cell, which forms a single cell water activated battery. Water entering the monitored splice closure wets the tape, which activates the cell. The cell generates sufficient voltage and current to power timing, code generation and modulator circuits in the sensor unit for an extended period of time. The activated circuit drives a modulator which modulates the light travelling down the fibre. The modulated light is monitored at the equipment office and the address of the alarming sensor decoded.

摘要翻译： 本发明提供了一种用于监视光纤通信电缆的状况的监视器。 该系统采用电缆的一根或多根光纤来监测电缆结构是否损坏或扭结。 通过使用两个单独的激光源并同时监测在两个不同和分离的波长处的光学损耗，所监测的光纤的损耗特征被确定，分析并且与电缆结构的机械状态相关。 为了监测接合点的湿度，特殊的光接头传感器单元检测水进入接头的任何穿透，并将经过监视的光纤的编码报警信号传输到光接收机。 每个拼接位置都被分配一个唯一的传感器代码。 光接头传感器由水分检测电池驱动，形成单电池水活化电池。 进入受监视的接头闭合的水浸湿磁带，激活电池。 电池产生足够的电压和电流，以长时间为传感器单元中的定时，代码生成和调制器电路供电。 激活的电路驱动调制器，其调制沿着光纤行进的光。 调制光在设备办公室进行监控，报警传感器的地址被解码。

公开(公告)号：US5077526A

公开(公告)日：1991-12-31

申请号：US512318

申请日：1990-04-23

申请人： David E. Vokey ,  Kenneth N. Sontag

发明人： David E. Vokey ,  Kenneth N. Sontag

IPC分类号： G01R31/02

CPC分类号： G01R31/021

摘要： A system is provided for monitoring a communications cable for moisture penetration. A line signal generator is connected to a metal armour layer of the cable to apply a line signal to the armour. Changes in the line signal current are monitored to detect the condition of the cable. Moisture penetration can be monitored throughout the length of the cable. The armour layer is maintained at a negative potential with respective ground. This provides an additional cathodic protection to the cable.

摘要翻译： 提供一种用于监测通信电缆以进行水分渗透的系统。 线路信号发生器连接到电缆的金属装甲层，以将线信号施加到装甲。 监控线路信号电流的变化，以检测电缆的状况。 可以在电缆的整个长度上监测水分渗透。 装甲层用相应的地面保持在负电位。 这为电缆提供了额外的阴极保护。