公开(公告)号：US4670863A

公开(公告)日：1987-06-02

申请号：US799883

申请日：1985-11-20

申请人： John J. Sallas ,  Toby R. Trevino

发明人： John J. Sallas ,  Toby R. Trevino

IPC分类号： G01V1/04 ,  H04R23/00

CPC分类号： G01V1/04

摘要： A vibrator seismic source has a sweep generator for providing a pilot signal and sensors for generating a feedback signal representative of the force imparted to the ground by the vibrator pad. Circuitry is incorporated for separating the fundamental signal from the feedback signal and for separating the distortion from the feedback signal. Means are provided for generating a control signal for controlling the action of the vibrator means. Included are means for reducing the amplitude of the pilot signal a designated amount, determined by the distortion, and means for algebraically summing the reduced amplitude pilot signal and the fundamental signal to provide an error signal. The error signal is input to a loop filter to perform real time correction of the control signal. The reduced amplitude pilot signal is input to means for adjusting the control signal for trends in the distortion. Additionally, the control system employs a phase detector circuit that outputs any phase difference between the feedback and pilot signals. The phase difference is applied to the control signal to shift the feedback signal phase to correspond to the pilot signal.

摘要翻译： 振动器地震源具有用于提供导频信号的扫描发生器和用于产生表示由振动器垫传递给地面的力的反馈信号的传感器。 引入电路用于将基本信号与反馈信号分离，并将失真与反馈信号分离。 提供了用于产生用于控制振动器装置的作用的控制信号的装置。 包括用于减小由失真确定的指定量的导频信号的幅度的装置，以及用于对减小的幅度导频信号和基本信号进行代数求和以提供误差信号的装置。 误差信号被输入到环路滤波器，以执行控制信号的实时校正。 减小的幅度导频信号被输入到用于调整失真趋势的控制信号的装置。 此外，控制系统采用相位检测器电路，其输出反馈和导频信号之间的任何相位差。 将相位差施加到控制信号，以使反馈信号相位相应于导频信号。

公开(公告)号：US4616352A

公开(公告)日：1986-10-07

申请号：US435124

申请日：1982-10-18

申请人： John J. Sallas ,  Toby R. Trevino ,  Haroon I. Alvi ,  John S. Shoffner ,  Cameron B. Wason

发明人： John J. Sallas ,  Toby R. Trevino ,  Haroon I. Alvi ,  John S. Shoffner ,  Cameron B. Wason

IPC分类号： G01V1/04 ,  G01V1/02

CPC分类号： G01V1/04

摘要： A vibrator seismic source has a sweep generator for providing a pilot signal and sensors for generating a feedback signal representative of the force imparted to the ground by the vibrator pad. Circuitry is incorporated for separating the fundamental signal from the feedback signal and for separating the distortion from the feedback signal. Means are provided for generating a control signal for controlling the action of the vibrator, the control signal being reduced or increased by the difference between the pilot signal and the fundamental signal, and further reduced by the distortion, if any. A threshold circuit is employed to ignore distortion below the threshold level and a threshold circuit is provided to ignore differences in amplitude between the pilot and fundamental signals when the difference is below the threshold. Additionally, the control system employs a phase detector circuit that outputs any phase difference between the feedback and pilot signals. The phase difference is applied to the control signal to shift the feedback signal phase to correspond to the pilot signal.

摘要翻译： 振动器地震源具有用于提供导频信号的扫描发生器和用于产生表示由振动器垫传递给地面的力的反馈信号的传感器。 引入电路用于将基本信号与反馈信号分离，并将失真与反馈信号分离。 提供了用于产生用于控制振动器的作用的控制信号的装置，通过导频信号和基本信号之间的差异来减小或增加控制信号，并且进一步减少失真（如果有的话）。 阈值电路用于忽略低于阈值电平的失真，并且提供阈值电路以在差值低于阈值时忽略导频信号和基本信号之间的幅度差异。 此外，控制系统采用相位检测器电路，其输出反馈和导频信号之间的任何相位差。 将相位差施加到控制信号，以使反馈信号相位相应于导频信号。