公开(公告)号：US4156867A

公开(公告)日：1979-05-29

申请号：US830531

申请日：1977-09-06

申请人： Stephen M. Bench ,  William R. Dirkes ,  Manohar A. Joglekar ,  James C. Secora ,  Michael A. Stepien

发明人： Stephen M. Bench ,  William R. Dirkes ,  Manohar A. Joglekar ,  James C. Secora ,  Michael A. Stepien

IPC分类号： H03G3/34 ,  H04B7/26 ,  H04L1/00 ,  H04L7/033 ,  H04L7/04 ,  G06F11/12

CPC分类号： H04L1/0057 ,  H03G3/34 ,  H04B7/2675 ,  H04W56/0085 ,  H04L1/0071 ,  H04L7/033 ,  H04L7/041

摘要： A data communication system for use in the control and monitoring of mobile stations, for example, in a bus monitoring system, from a central station over a communication channel carrying both data and voice information. Information is encoded into digital messages having a start code followed by one or more data blocks. The start code identifies the beginning of the data block that follows and enables synchronization of clock circuitry to the received data frequency. The data blocks have N digital words with M binary bits where one word is a parity word and N-1 words are data words. Each of the data words has a data portion and parity portion coded for correction of at least one error. Reliability is enhanced by a data detector which discriminates between data and noise or voice to provide an indication of the presence of data. In transmitting the digital messages, the bits of the N words in each data block are interleaved to provide protection against error bursts.

摘要翻译： 一种数据通信系统，用于通过承载数据和语音信息的通信信道从中央站控制和监视移动站，例如在总线监控系统中。 信息被编码成具有开始码后跟一个或多个数据块的数字消息。 起始码标识随后的数据块的开始，并启用时钟电路与接收数据频率的同步。 数据块具有N个具有M个二进制位的数字字，其中一个字是奇偶校验字，而N-1个字是数据字。 每个数据字具有编码用于校正至少一个错误的数据部分和奇偶校验部分。 通过数据检测器增强可靠性，数据检测器区分数据和噪声或语音以提供数据存在的指示。 在发送数字消息时，每个数据块中的N个字的比特被交织以提供防止错误突发的保护。

公开(公告)号：US09571326B2

公开(公告)日：2017-02-14

申请号：US12715684

申请日：2010-03-02

申请人： Stephen M. Bench ,  Roger B. Shaffer

发明人： Stephen M. Bench ,  Roger B. Shaffer

IPC分类号： H04N7/12 ,  H04L27/36 ,  H04L27/34 ,  H04L27/38

CPC分类号： H04L27/362 ,  H04L27/3455 ,  H04L27/3818

摘要： A Quadrature Amplitude Modulation (QAM) method and apparatus including a QAM transmit modulator with at least one unbalanced mixer, which creates an asymmetric two-dimensional (2-D) QAM symbol constellation. The asymmetrical symbol constellation provides baseband symbol clock signal leakage sufficient to facilitate quick and simple baseband symbol clock recovery and signal channel compensation at the QAM receiver without significantly degrading the system bit-error rate (BER). While slightly degrading static BER, overall system performance is improved when considering baseband symbol clock recovery and received signal compensation for an imperfect signal channel. This allows QAM to be deployed in systems where QAM is otherwise prohibitively expensive and improves overall system performance for any existing QAM system application without additional bandwidth, cost or complexity.

摘要翻译： 一种正交幅度调制（QAM）方法和装置，其包括具有至少一个不平衡混频器的QAM发射调制器，其产生不对称二维（2-D）QAM符号星座。 不对称符号星座提供足够的基带符号时钟信号泄漏，以便于在QAM接收机上快速简单的基带符号时钟恢复和信号信道补偿，而不会显着降低系统误码率（BER）。 在考虑基带符号时钟恢复和不完美信号通道的接收信号补偿的同时，静态BER略有降低，整体系统性能得到改善。 这样就可以将QAM部署在其他QAM价格昂贵的系统中，并且可以提高任何现有QAM系统应用的整体系统性能，而无需额外的带宽，成本或复杂性。

公开(公告)号：US08841912B2

公开(公告)日：2014-09-23

申请号：US13164696

申请日：2011-06-20

申请人： Stephen M. Bench

发明人： Stephen M. Bench

IPC分类号： G01V3/08 ,  G01R21/14 ,  G01V3/10

CPC分类号： G01V3/101

摘要： A pre-amplifier circuit for connection to an antenna of a human-portable locator includes a differential amplifier/mixer pair and means for allowing a common-mode “phantom” signal to modulate a transfer function of the differential amplifier/mixer pair. The common-mode phantom signal modulates the transfer function of the differential pre-amplifier “onboard” the antenna without the usual requirement for onboard power supply and signal oscillator. This technique uses the same electronic components to provide both pre-amplification and mixing functions, thereby improving circuit performance-to-cost ratio, reducing mixer power consumption, situating the necessary signal oscillator remotely from the mixer, and greatly improving the available system bandwidth by limiting spectral transmission demands to the mixed signal bandwidth alone.

摘要翻译： 用于连接到便携式定位器的天线的前置放大器电路包括差分放大器/混频器对以及用于允许共模“幻影”信号调制差分放大器/混频器对的传递函数的装置。 共模幻影信号调制差分前置放大器“板上”天线的传递函数，而不需要板载电源和信号振荡器。 该技术使用相同的电子元件来提供预放大和混合功能，从而提高电路性能与成本比，减少混频器功耗，将必要的信号振荡器从混频器远程定位，并通过以下方式大大提高可用系统带宽 仅限于混合信号带宽的频谱传输需求。

公开(公告)号：US08717028B1

公开(公告)日：2014-05-06

申请号：US13220594

申请日：2011-08-29

申请人： Ray Merewether ,  Mark S. Olsson ,  Jeffrey A. Prsha ,  Jan Soukup ,  David A. Cox ,  Mark F. Fleming ,  Lisa E. Latimer ,  Ryan B. Levin ,  Michael E. Turgeon ,  Stephen M. Bench ,  Edward N. Denaci

发明人： Ray Merewether ,  Mark S. Olsson ,  Jeffrey A. Prsha ,  Jan Soukup ,  David A. Cox ,  Mark F. Fleming ,  Lisa E. Latimer ,  Ryan B. Levin ,  Michael E. Turgeon ,  Stephen M. Bench ,  Edward N. Denaci

IPC分类号： G01V3/08 ,  F16L3/00

CPC分类号： G01V3/165 ,  G01V3/10 ,  G01V3/101 ,  G01V3/15 ,  Y10T24/44376

摘要： A high-Q human-portable, battery-powered self-correcting tunable resonator in a transmitter apparatus for inducing alternating currents of high quality in buried conductors to facilitate their location is disclosed. The transmitter apparatus may employ an FET-driven capacitive tuning circuit and a coil design that achieves high precision, high-quality transmission signals, and which may be equipped with a high-voltage booster for facilitating fault-localization applications.

摘要翻译： 公开了一种用于在掩埋导体中诱发高质量的交流电流以便于其定位的发射机设备中的高Q便携式，电池供电的自校正可调谐振荡器。 发射机装置可以采用FET驱动的电容调谐电路和线圈设计，其实现高精度，高质量的传输信号，并且其可以配备有用于促进故障定位应用的高压增压器。

公开(公告)号：US08395661B1

公开(公告)日：2013-03-12

申请号：US12399859

申请日：2009-03-06

申请人： Mark S. Olsson ,  Michael J. Martin ,  Ray Merewether ,  Stephen M. Bench ,  Tran Nguyen

发明人： Mark S. Olsson ,  Michael J. Martin ,  Ray Merewether ,  Stephen M. Bench ,  Tran Nguyen

IPC分类号： A61B1/06

CPC分类号： G06T7/0004 ,  G01N21/954 ,  G01N2021/9542 ,  G02B23/2484 ,  G03B37/005 ,  H04N5/2252 ,  H04N5/2253 ,  H04N5/23206 ,  H04N2005/2255

摘要： Various pipe inspection systems include a camera head operatively connected to the distal end of a push-cable. Images may be automatically captured at predetermined distances of travel, or may be automatically captured based on the output signals from the auto-focus, auto-exposure and/or auto-white balance engines indicating, for example, that the camera motion within the pipe is substantially zero. Images may be captured in an automatic mode at predetermined intervals as the camera head travels within the pipe or in an override mode initiated by operator command. The system may include a data transmission circuit that transmits data between a plurality of nodes at a frequency that does not substantially interfere with a normal base band video transmission frequency.

公开(公告)号：US08013610B1

公开(公告)日：2011-09-06

申请号：US11961858

申请日：2007-12-20

申请人： Ray Merewether ,  Mark S. Olsson ,  Jeffrey A. Praha ,  Jan Soukup ,  David A. Cox ,  Mark F. Fleming ,  Lisa E. Latimer ,  Ryan B. Levin ,  Michael E. Turgeon ,  Stephen M. Bench ,  Edward N. Denaci

发明人： Ray Merewether ,  Mark S. Olsson ,  Jeffrey A. Praha ,  Jan Soukup ,  David A. Cox ,  Mark F. Fleming ,  Lisa E. Latimer ,  Ryan B. Levin ,  Michael E. Turgeon ,  Stephen M. Bench ,  Edward N. Denaci

IPC分类号： G01V3/08

CPC分类号： G01V3/165 ,  G01V3/10 ,  G01V3/101 ,  G01V3/15 ,  Y10T24/44376

摘要： A high-Q human-portable, battery-powered self-correcting tunable resonator in a transmitter apparatus for inducing alternating currents of high quality in buried conductors to facilitate their location. The transmitter apparatus employs an FET-driven capacitive tuning circuit and a coil design that achieves high precision, high-quality transmission signals, and which is equipped with a high-voltage booster for facilitating fault-localization applications.

公开(公告)号：US20100225752A1

公开(公告)日：2010-09-09

申请号：US12715684

申请日：2010-03-02

申请人： Stephen M. Bench ,  Roger B. Shaffer

发明人： Stephen M. Bench ,  Roger B. Shaffer

IPC分类号： H04L27/34 ,  H04N7/18

CPC分类号： H04L27/362 ,  H04L27/3455 ,  H04L27/3818

摘要： A Quadrature Amplitude Modulation (QAM) method and apparatus including a QAM transmit modulator with at least one unbalanced mixer, which creates an asymmetric two-dimensional (2-D) QAM symbol constellation. The asymmetrical symbol constellation provides baseband symbol clock signal leakage sufficient to facilitate quick and simple baseband symbol clock recovery and signal channel compensation at the QAM receiver without significantly degrading the system bit-error rate (BER). While slightly degrading static BER, overall system performance is improved when considering baseband symbol clock recovery and received signal compensation for an imperfect signal channel. This allows QAM to be deployed in systems where QAM is otherwise prohibitively expensive and improves overall system performance for any existing QAM system application without additional bandwidth, cost or complexity.

摘要翻译： 一种正交幅度调制（QAM）方法和装置，其包括具有至少一个不平衡混频器的QAM发射调制器，其产生不对称二维（2-D）QAM符号星座。 不对称符号星座提供足够的基带符号时钟信号泄漏，以便于在QAM接收机上快速简单的基带符号时钟恢复和信号信道补偿，而不会显着降低系统误码率（BER）。 在考虑基带符号时钟恢复和不完美信号通道的接收信号补偿的同时，静态BER略有降低，整体系统性能得到改善。 这样就可以将QAM部署在其他QAM价格昂贵的系统中，并且可以提高任何现有QAM系统应用的整体系统性能，而无需额外的带宽，成本或复杂性。

公开(公告)号：US4229822A

公开(公告)日：1980-10-21

申请号：US7086

申请日：1979-01-29

申请人： Stephen M. Bench

发明人： Stephen M. Bench

IPC分类号： H03G3/34 ,  H04B7/26 ,  H04L1/00 ,  H04L1/20 ,  H04L7/033 ,  H04L7/04 ,  H04W88/02 ,  H03D3/18 ,  H04L27/14

CPC分类号： H04W88/026 ,  H03G3/34 ,  H04L1/0057 ,  H04L1/20 ,  H04L1/0071 ,  H04L7/033 ,  H04L7/041

摘要： A data communication system for use in the control and monitoring of mobile stations, for example, in a bus monitoring system, from a central station over a communication channel carrying both data and voice information. Information is encoded into digital messages having a start code followed by one or more data blocks. The start code identifies the beginning of the data block that follows and enables synchronization of clock circuitry to the received data frequency. The data blocks have N digital words with M binary bits where one word is a parity word and N-1 words are data words. Each of the data words has a data portion and parity portion coded for correction of at least one error. Reliability is enhanced by a data detector which discriminates between data and noise or voice to provide an indication of the presence of data. In transmitting the digital messages, the bits of the N words in each data block are interleaved to provide protection against error bursts.

摘要翻译： 一种数据通信系统，用于通过承载数据和语音信息的通信信道从中央站控制和监视移动站，例如在总线监控系统中。 信息被编码成具有开始码后跟一个或多个数据块的数字消息。 起始码标识随后的数据块的开始，并启用时钟电路与接收数据频率的同步。 数据块具有N个具有M个二进制位的数字字，其中一个字是奇偶校验字，而N-1个字是数据字。 每个数据字具有编码用于校正至少一个错误的数据部分和奇偶校验部分。 通过数据检测器增强可靠性，数据检测器区分数据和噪声或语音以提供数据存在的指示。 在发送数字消息时，每个数据块中的N个字的比特被交织以提供防止错误突发的保护。

公开(公告)号：US08400154B1

公开(公告)日：2013-03-19

申请号：US12367254

申请日：2009-02-06

申请人： Mark S. Olsson ,  Stephen M. Bench ,  Ryan B. Levin ,  Ray Merewether

发明人： Mark S. Olsson ,  Stephen M. Bench ,  Ryan B. Levin ,  Ray Merewether

IPC分类号： G01V3/08

CPC分类号： G01V15/00

摘要： An antenna useful in an antenna array of a man-portable buried utility locator includes a flexible bobbin made of copper foil. The bobbin has a plurality of axially spaced grooves and an axially extending gap formed therein. A layer of insulation surrounds an outer surface of the bobbin. A conductive wire is disposed in the grooves and wound around the bobbin over the layer of insulation to form a plurality of axially spaced sub-coils. A layer of copper-foil tape having an insulating backing is wound about the conductive wire and has a second gap aligned with the gap in the bobbin. A layer of a low dielectric material is wound about the copper-foil tape. The antenna provides more antenna wire surface for an equivalent coil cross-sectional area, compared to prior art antennas, thus yielding greater sensitivity. The construction of the antenna provides a series of Faraday-shielded sub-coils, which yield a greater useful antenna bandwidth by moving the inherent resonance of each coil to a higher frequency. The construction of the antenna also reduces inherent winding capacitance and provides a self-shielding effect that further improves sensitivity.

摘要翻译： 用于便携式埋地式实用定位器的天线阵列中的天线包括由铜箔制成的柔性线轴。 线轴具有多个轴向隔开的槽和在其中形成的轴向延伸间隙。 绝缘层围绕线轴的外表面。 导线布置在沟槽中并围绕线轴缠绕在绝缘层上以形成多个轴向隔开的子线圈。 具有绝缘背衬的一层铜箔带卷绕在导线上，并且具有与线轴中的间隙对准的第二间隙。 一层低介电材料缠绕在铜箔带上。 与现有技术的天线相比，天线为等效线圈横截面积提供更多的天线导线表面，从而产生更高的灵敏度。 天线的结构提供了一系列法拉第屏蔽子线圈，通过将每个线圈的固有谐振移动到更高的频率，产生更大的有用的天线带宽。 天线的结构也降低固有的绕组电容，并提供进一步提高灵敏度的自屏蔽效果。

公开(公告)号：US07969151B2

公开(公告)日：2011-06-28

申请号：US12367419

申请日：2009-02-06

申请人： Stephen M. Bench

发明人： Stephen M. Bench

IPC分类号： G01V3/08 ,  G01R21/14

CPC分类号： G01V3/101

摘要： A pre-amplifier circuit for connection to an antenna of a human-portable locator includes a differential amplifier/mixer pair and means for allowing a common-mode “phantom” signal to modulate a transfer function of the differential amplifier/mixer pair. The common-mode phantom signal modulates the transfer function of the differential pre-amplifier “onboard” the antenna without the usual requirement for onboard power supply and signal oscillator. This technique uses the same electronic components to provide both pre-amplification and mixing functions, thereby improving circuit performance-to-cost ratio, reducing mixer power consumption, situating the necessary signal oscillator remotely from the mixer, and greatly improving the available system bandwidth by limiting spectral transmission demands to the mixed signal bandwidth alone.

摘要翻译： 用于连接到便携式定位器的天线的前置放大器电路包括差分放大器/混频器对以及用于允许共模“幻影”信号调制差分放大器/混频器对的传递函数的装置。 共模幻影信号调制差分前置放大器“板上”天线的传递函数，而不需要板载电源和信号振荡器。 该技术使用相同的电子元件来提供预放大和混合功能，从而提高电路性能与成本比，减少混频器功耗，将必要的信号振荡器从混频器远程定位，并通过以下方式大大提高可用系统带宽 仅限于混合信号带宽的频谱传输需求。