公开(公告)号：US08787112B2

公开(公告)日：2014-07-22

申请号：US12958158

申请日：2010-12-01

Applicant: David M Cook ,  Ran-Fun Chiu

Inventor： David M Cook ,  Ran-Fun Chiu

IPC: G01V1/36 ,  G01V1/28

CPC classification number: G01V1/375

Abstract: Methods and apparatus are provided related to seismic sensor data. Seismic sensor signaling is digitally sampled in accordance with a local clock and without synchronization to standardized time. Timestamp data is used to synthesize data correspondent to an artificial stimulus waveform. Cross-correlation of the synthesized data with the seismic sensor data yields a correlation result. The correlation result can be scaled to an original starting time for the seismic data sampling. The scaled correlation result can be stored in computer-accessible media and subject to further processing or interpretation.

Abstract translation: 提供了与地震传感器数据相关的方法和装置。 地震传感器信号根据本地时钟进行数字采样，无需与标准化时间同步。 时间戳数据用于合成与人造刺激波形相对应的数据。 合成数据与地震传感器数据的相互关系产生相关结果。 相关结果可以缩放到地震数据采样的原始起始时间。 缩放的相关结果可以存储在计算机可访问的媒体中，并进行进一步的处理或解释。

公开(公告)号：US08733477B1

公开(公告)日：2014-05-27

申请号：US12911609

申请日：2010-10-25

Applicant: David M. Cook

Inventor： David M. Cook

IPC: B62D11/00 ,  B62D11/18 ,  A01B45/02

CPC classification number: B62D11/183 ,  A01B45/02 ,  A01D34/824

Abstract: A speed control system for an earth working apparatus. The speed control system includes a steering structure and a speed control lever movably coupled to the steering structure. The speed control lever may be operatively coupled to a self propel system of the earth working apparatus. The speed control lever is at rest in a neutral position, is actuable in a first direction for forward movement of the apparatus, and may be actuable in a second direction for rearward movement of the apparatus.

Abstract translation: 一种土方工程装置的速度控制系统。 速度控制系统包括转向结构和可移动地联接到转向结构的速度控制杆。 速度控制杆可以可操作地联接到土方工程装置的自推进系统。 速度控制杆在中立位置处于静止状态，可在第一方向上致动以使装置向前运动，并且可在第二方向上致动以使装置向后移动。

公开(公告)号：US20120112811A1

公开(公告)日：2012-05-10

申请号：US13384723

申请日：2010-02-19

Applicant: David M. Cook

Inventor： David M. Cook

IPC: H03K7/08 ,  H03K3/017

CPC classification number: H03K7/08 ,  H03K2005/00286

Abstract: One embodiment provides a system for generating a reference waveform. The system can include a first pulse-width modulation (PWM) channel configured to provide a first PWM waveform having a first duty cycle and a first frequency. A second PWM channel is configured to provide a second PWM waveform having a second duty cycle and the first frequency. Combinational logic is configured to combine the first PWM waveform and the second PWM waveform to generate a phase-shifted reference PWM waveform having the first frequency and a phase shift that is based on the first duty cycle and the second duty cycle.

Abstract translation: 一个实施例提供了一种用于产生参考波形的系统。 该系统可以包括被配置为提供具有第一占空比和第一频率的第一PWM波形的第一脉冲宽度调制（PWM）通道。 第二PWM通道被配置为提供具有第二占空比和第一频率的第二PWM波形。 组合逻辑被配置为组合第一PWM波形和第二PWM波形以产生具有基于第一占空比和第二占空比的第一频率和相移的移相参考PWM波形。

公开(公告)号：US5841394A

公开(公告)日：1998-11-24

申请号：US872899

申请日：1997-06-11

Applicant: William G. Sterns ,  David M. Cook ,  Richard J. Ouwerkerk

Inventor： William G. Sterns ,  David M. Cook ,  Richard J. Ouwerkerk

IPC: G01S7/40 ,  G01S13/91 ,  H01Q3/26

CPC classification number: G01S7/4008 ,  H01Q3/267 ,  G01S13/913

Abstract: A radar system is described, which includes a built-in calibration/fault detection apparatus that enables rapid and easy calibration of the system. The system includes a long extrusion (70) forming a feed waveguide (90), a calibration waveguide (92), and a base (94) of a horn antenna. A linear array of TR (transmit/receive) units (42) are mounted on the extrusion, with each having a feed probe (100) that receives a feed signal, changes its phase and amplifies it, and delivers it through a monopole (110) to the horn. The calibration waveguide is coupled through holes (130) to the horn, with a calibration pickup (132) mounted at the end of the calibration waveguide. During calibration, one TR unit at a time is energized, and its output is detected by the calibration pickup to check the amplitude and phase of the TR unit.

Abstract translation: 描述了雷达系统，其包括内置的校准/故障检测装置，其能够快速和容易地校准系统。 该系统包括形成馈电波导（90）的长挤出（70），校准波导（92）和喇叭天线的基座（94）。 TR（发送/接收）单元（42）的线性阵列安装在挤出件上，每个具有馈送探针（100），其接收馈送信号，改变其相位并放大它，并将其传送通过单极子（110 ）到角。 校准波导通过孔（130）耦合到喇叭，校准波导（132）安装在校准波导的末端。 在校准期间，一次一个TR单元通电，其输出由校准拾取器检测，以检查TR单元的幅度和相位。

公开(公告)号：USD247321S

公开(公告)日：1978-02-21

申请号：US709882

申请日：1976-07-29

Applicant: David M. Cook

Designer： David M. Cook