公开(公告)号：US5206854A

公开(公告)日：1993-04-27

申请号：US766234

申请日：1991-09-24

申请人： William L. Betts ,  Robert A. Day, II

发明人： William L. Betts ,  Robert A. Day, II

IPC分类号： H04B3/23

CPC分类号： H04B3/237

摘要： In a full-duplex modem, correlation of an echo estimate signal with an echo-canceled signal is used to determine the presence or absence of a remote signal.

摘要翻译： 在全双工调制解调器中，使用回波估计信号与回波消除信号的相关性来确定是否存在远程信号。

公开(公告)号：US4888861A

公开(公告)日：1989-12-26

申请号：US786384

申请日：1985-10-10

申请人： Robert A. Day

发明人： Robert A. Day

IPC分类号： B06B1/06

CPC分类号： B06B1/0625 ,  Y10T29/42

摘要： A method for manufacturing an annular acoustic transducer array from a plate of transducer material, which enables production of precision aligned arrays at low cost. The circular plate is sawed along at least two lines that are radial to the axis of the plate. At steps along each radial cut, the plate is rotated first in one direction and then in an opposite direction by a predetermined angle such as slightly less than 90.degree.. The cuts result in the forming of several largely ring-shaped lands, each largely ring-shaped land being joined to the other rings of different radii by thin portions of the plate, and each ring being cut into segments. The bridges that join different rings, hold the transducer together until it can be mounted on a lens.

摘要翻译： 一种用于从换能器材料板制造环形声换能器阵列的方法，其能够以低成本制造精密对准的阵列。 沿着与板的轴线径向的至少两条线锯切圆形板。 在沿着每个径向切割的台阶上，板在一个方向上首先旋转，然后沿相反方向旋转预定角度，例如稍微小于90度。 这种切割导致形成几个大的环形台面，每个大的环形台阶通过板的薄部分连接到不同半径的其他环，并且每个环被切割成段。 连接不同环的桥，将传感器固定在一起，直到它可以安装在镜头上。

公开(公告)号：US4599719A

公开(公告)日：1986-07-08

申请号：US621517

申请日：1984-06-18

申请人： Robert N. Breen ,  Robert A. Day, II ,  Victor B. Lawrence ,  Michael R. Zboray

发明人： Robert N. Breen ,  Robert A. Day, II ,  Victor B. Lawrence ,  Michael R. Zboray

IPC分类号： H04L5/16 ,  H04L5/14

CPC分类号： H04L5/16

摘要： Half-duplex switched carrier operation is emulated in a full-duplex voiceband data transmission system by utilizing predetermined signal indications in each channel to signal the initiation and termination of user data in that channel and thus to control the Receive Line Signal lead extending to the terminals at respective ends of the transmission channel. The signal indication which signals the initiation of transmission is illustratively two scrambled spaces inserted into an idle-state sequence of continuous scrambled marks. The signal indication which signals the termination of transmission is illustratively a stream of 65 unscrambled marks.

摘要翻译： 半双工交换载波操作在全双工语音频带数据传输系统中被仿真，通过利用每个信道中的预定信号指示来表示该信道中的用户数据的启动和终止，从而控制延伸到终端的接收线信号线 在传输信道的相应端。 信号发送发信号的信号指示例如是插入连续加扰标记的空闲状态序列中的两个加扰空间。 信号终止传输的信号指示示例性地是65个未加扰标记的流。

公开(公告)号：US4189944A

公开(公告)日：1980-02-26

申请号：US957620

申请日：1978-11-03

申请人： Robert A. Day ,  Armond E. Conti

发明人： Robert A. Day ,  Armond E. Conti

IPC分类号： G01N29/265 ,  G01N29/04

CPC分类号： G01N29/265

摘要： An improved probe for in-service ultrasonic inspection of long lengths of a workpiece, such as small diameter tubing from the interior. The improved probe utilizes a conventional transducer or transducers configured to inspect the tubing for flaws and/or wall thickness variations. The probe utilizes a hydraulic technique, in place of the conventional mechanical guides or bushings, which allows the probe to move rectilinearly or rotationally while preventing cocking thereof in the tube and provides damping vibration of the probe. The probe thus has lower friction and higher inspection speed than presently known probes.

摘要翻译： 一种改进的探头，用于长时间工件的在役超声波检测，例如内部的小直径管道。 改进的探针利用常规的换能器或换能器来构造以检查管道的缺陷和/或壁厚变化。 探针采用液压技术代替常规的机械导向器或套管，这允许探头直线运动或旋转运动，同时防止其在管中的翘起并提供探头的阻尼振动。 因此，探头具有比目前已知的探针更低的摩擦力和更高的检查速度。

公开(公告)号：US4062105A

公开(公告)日：1977-12-13

申请号：US752571

申请日：1976-12-20

申请人： Robert A. Day

发明人： Robert A. Day

IPC分类号： H01L41/24 ,  H04R31/00

CPC分类号： H01L41/257 ,  Y10T29/42 ,  Y10T29/49005

摘要： A method for fabricating ferroelectric ultrasonic transducers by directing beam of electrons at a disk of ferroelectric material to produce a thin plate throughout which the Curie temperature is exceeded, and by applying a high DC Voltage across the faces of the disk while the Curie temperature is exceeded to polarize the thin plate.

摘要翻译： 一种制造铁电超声换能器的方法，该方法是通过在铁电材料的盘上引导电子束来产生超过居里温度的薄板，并且通过在盘的表面施加高的直流电压，而居里温度为 超过极化极板。

公开(公告)号：US20110296226A1

公开(公告)日：2011-12-01

申请号：US13103072

申请日：2011-05-08

申请人： Massimo Sorbara ,  Sigurd Schelstraete ,  Robert A. Day ,  Peter D. Keller

发明人： Massimo Sorbara ,  Sigurd Schelstraete ,  Robert A. Day ,  Peter D. Keller

IPC分类号： G06F1/12

CPC分类号： H04J3/0685 ,  H04J3/0638 ,  H04J3/0667 ,  H04L27/2656 ,  H04L27/2673 ,  H04M11/062

摘要： Systems and methods for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location are described. One embodiment is a method that comprises receiving, by a time-of-day transmission convergence (ToD-TC) module in the CPE, ToD information relating to the master clock. Based on the received information, time stamps are applied to reference data samples. The method further comprises transporting the ToD information by transporting the reference data samples with applied time stamps and utilizing time stamps of the reference data samples to synchronize the CPE clock with the master clock.

摘要翻译： 描述了用于在客户驻地设备（CPE）位置与中心局（CO）位置处的主时钟同步时钟的系统和方法。 一个实施例是一种方法，其包括通过CPE中的日期传输收敛（ToD-TC）模块接收与主时钟相关的ToD信息。 基于接收到的信息，将时间戳应用于参考数据样本。 该方法还包括通过传送具有应用时间戳的参考数据样本并利用参考数据样本的时间戳来传送ToD信息，以使CPE时钟与主时钟同步。

公开(公告)号：US07978756B2

公开(公告)日：2011-07-12

申请号：US12098696

申请日：2008-04-07

申请人： Hemant Samdani ,  Kunal Raheja ,  Rahul Garg ,  Patrick Duvaut ,  Amitkumar Mahadevan ,  Robert A. Day ,  Robin Levonas

发明人： Hemant Samdani ,  Kunal Raheja ,  Rahul Garg ,  Patrick Duvaut ,  Amitkumar Mahadevan ,  Robert A. Day ,  Robin Levonas

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC分类号： H04L27/2647 ,  H04B3/487

摘要： Systems and methods for monitoring impulse noise are described. At least one embodiment is a method, which comprises detecting whether impulse noise is present and in response to detecting the presence of impulse noise, performing time domain analysis to determine whether one or more impulse noise sources are present based on minimum interarrival time and maximum impulse length. The method further includes performing frequency domain analysis to estimate frequencies associated with the one or more impulse noise sources and based on the time domain analysis and frequency domain analysis, providing a total number of impulse noise sources and frequencies associated with the impulse noise sources. In this regard, the embodiments described herein provide dual-speed monitoring of impulse noise in the form of short-term and long-term monitoring. The use of dual-speed monitoring ensures that dynamic changes in the impulse noise environment are quickly addressed and also ensures better characterization of multiple impulse noise sources in order to provide better impulse noise protection.

摘要翻译： 描述了用于监视脉冲噪声的系统和方法。 至少一个实施例是一种方法，其包括检测是否存在脉冲噪声并且响应于检测到脉冲噪声的存在，执行时域分析以基于最小间隔时间和最大脉冲来确定是否存在一个或多个脉冲噪声源 长度。 该方法还包括执行频域分析以估计与一个或多个脉冲噪声源相关联的频率，并且基于时域分析和频域分析，提供脉冲噪声源和与脉冲噪声源相关联的频率的总数。 在这方面，本文描述的实施例以短期和长期监视的形式提供脉冲噪声的双速度监测。 使用双速度监测可确保脉冲噪声环境中的动态变化得到快速解决，并确保更好地表征多个脉冲噪声源，以提供更好的脉冲噪声保护。

公开(公告)号：US1184643A

公开(公告)日：1916-05-23

申请号：US7507916

申请日：1916-01-29

申请人： ROBERT A DAY ,  HARTMAN HENRY

发明人： HARTMAN HENRY

IPC分类号： B68B1/02

CPC分类号： B68B1/02

公开(公告)号：US4551647A

公开(公告)日：1985-11-05

申请号：US472871

申请日：1983-03-08

申请人： Robert A. Day

发明人： Robert A. Day

IPC分类号： B06B1/06 ,  G10K11/30 ,  H01L41/24 ,  H01L41/08 ,  H04R17/00

CPC分类号： B06B1/0651 ,  G10K11/30 ,  H01L41/313 ,  Y10T29/42

摘要： An ultrasonic transducer for use in a high temperature environment and method for fabricating the same. A disk-shaped piezoelectric crystal is weakened in at least one surface in accordance with a predetermined line pattern relative to a first direction in that surface. The crystal is bonded to a thin lens material with a coefficient of thermal expansion dissimilar in this first direction. The predetermined line pattern is adapted to relieve stress in this first direction created by unequal rates of expansion or contraction of the crystal and the lens.

摘要翻译： 一种用于高温环境的超声换能器及其制造方法。 根据相对于该表面中的第一方向的预定线图案，盘形压电晶体在至少一个表面中被削弱。 晶体结合到具有在该第一方向上不同的热膨胀系数的薄透镜材料。 预定的线条图案适于缓解由晶体和透镜的不等的膨胀或收缩速率产生的在该第一方向上的应力。

公开(公告)号：US06658499B1

公开(公告)日：2003-12-02

申请号：US09815509

申请日：2001-03-23

申请人： Robert A. Day ,  Kamran Khederzadeh ,  Kamal Patel

发明人： Robert A. Day ,  Kamran Khederzadeh ,  Kamal Patel

IPC分类号： G06F1310

CPC分类号： H04L47/822 ,  H04L5/1446 ,  H04L47/15 ,  H04L47/70 ,  H04L47/743 ,  H04L47/745 ,  H04L47/748 ,  Y02D50/10

摘要： A system and method for ADSL USB bandwidth negotiation are presented. The system comprises a modem that is configured to transfer data between an ADSL line and a USB bus and that is further configured to receive an ADSL line rate setting, submit an isochronous bandwidth request to a computer, reduce the isochronous bandwidth request in response to the availability of isochronous bandwidth, modify the ADSL line rate setting in response to the availability of isochronous bandwidth, and modify the USB bus transfer mode in response to the availability of isochronous bandwidth. The method comprises steps of receiving an ADSL line rate setting, submitting an isochronous bandwidth request to a computer, reducing the isochronous bandwidth request in response to the availability of isochronous bandwidth, modifying the ADSL line rate setting in response to the availability of isochronous bandwidth, and modifying the USB bus transfer mode of the ADSL USB modem in response to the availability of isochronous bandwidth.

摘要翻译： 介绍了ADSL USB带宽协商的系统和方法。 该系统包括调制解调器，其被配置为在ADSL线路和USB总线之间传送数据，并且还被配置为接收ADSL线路速率设置，向计算机提交等时带宽请求，以响应于所述等时带宽请求而减少等时带宽请求 等时带宽的可用性，响应于等时带宽的可用性修改ADSL线路速率设置，并且响应于等时带宽的可用性来修改USB总线传送模式。 该方法包括以下步骤：接收ADSL线路速率设置，向计算机提交等时带宽请求，响应于等时带宽的可用性减少等时带宽请求，响应于等时带宽的可用性来修改ADSL线路速率设置， 并根据等时带宽的可用性修改ADSL USB调制解调器的USB总线传输模式。