公开(公告)号：US5396241A

公开(公告)日：1995-03-07

申请号：US12648

申请日：1993-02-03

申请人： Gregory H. Ames ,  Austin L. Widener

发明人： Gregory H. Ames ,  Austin L. Widener

IPC分类号： G01D3/02 ,  H03M1/06

CPC分类号： G01D3/022

摘要： A method and apparatus for linearizing an analog signal. The signal is converted into a digital form and digital gain and offset words are fetched based upon the value of the measurement signal and any other parameters which affect linearity, such as temperature for example. The digital gain and offset words are converted to analog values and inserted into an analog signal path of the measurement signal.

摘要翻译： 一种用于线性化模拟信号的方法和装置。 信号被转换为数字形式，并且基于测量信号的值和影响线性度的任何其它参数（例如温度）来获取数字增益和偏移字。 数字增益和偏移字被转换为模拟值并插入到测量信号的模拟信号路径中。

公开(公告)号：US5880680A

公开(公告)日：1999-03-09

申请号：US759656

申请日：1996-12-06

申请人： John C. Wisehart ,  Austin L. Widener ,  Jian Jin

发明人： John C. Wisehart ,  Austin L. Widener ,  Jian Jin

IPC分类号： E21B47/024 ,  G01V3/00

CPC分类号： E21B47/024

摘要： A guidance module for an underground horizontal boring assembly. The module determines the pitch angle of the boring tool independent of roll using a single accelerometer sensor. The accelerometer sensor has a single sensitive axis which is aligned parallel to, and preferably coaxial with, the longitudinal axis of the boring tool. The accelerometer sensor is calibrated to obtain a temperature offset and a gain compensating gain factor. Data samples are read from the accelerometer sensor while the boring tool is rotating. The temperature is read from the temperature sensor. The data samples from the accelerometer sensor and the temperature from the temperature sensor are transmitted to a processor. The processor applies simple average filtering to the accelerometer data samples to get an average result, and adjusts the average result for gain. The average result is adjusted for the temperature offset and for the gain compensating gain factor. The average result then can be adjusted for an optional roll angle offset. The pitch angle is determined either from a lookup table or from the arcsin value of the quantity of the average result minus the temperature offset divided by the gain compensating gain factor.

摘要翻译： 地下水平镗孔总成的引导模块。 该模块使用单个加速度传感器确定镗刀独立于滚子的俯仰角。 加速度计传感器具有与镗孔工具的纵向轴线平行并且优选与轴向对准的单个敏感轴。 校准加速度计传感器以获得温度偏移和增益补偿增益因子。 钻孔工具旋转时，从加速度传感器读取数据样本。 从温度传感器读取温度。 来自加速度计传感器的数据样本和来自温度传感器的温度被传送到处理器。 处理器对加速度计数据样本应用简单的平均滤波以获得平均结果，并调整增益的平均结果。 对于温度偏移和增益补偿增益因子调整平均结果。 然后可以对可选的滚动角偏移量调整平均结果。 俯仰角由查找表或平均值结果的arcsin值减去温度偏移除以增益补偿增益因子来确定。

公开(公告)号：US5872703A

公开(公告)日：1999-02-16

申请号：US918242

申请日：1997-08-25

申请人： Martin A. Williams ,  Austin L. Widener ,  Michael A. Wilson

发明人： Martin A. Williams ,  Austin L. Widener ,  Michael A. Wilson

IPC分类号： H02M3/337 ,  H02M3/335

CPC分类号： H02M3/3376

摘要： A system for regulating an alternating current voltage source has a pair of P-channel MOSFETs and a pair of N-channel MOSFETs in a bridge configuration with an inductor-capacitor tank there between. A processor in conjunction with a feedback circuit regulates the energy transferred to the tank by modulating the pulse width of signals that are output from the processor and which are used as inputs to the gates of the MOSFETs. By increasing or decreasing the pulse widths transmitted to the various gates of the MOSFETs, the processor increases or decreases the energy transferred to the tank. The feedback circuit is connected between the tank and the processor so that the processor can compare the feedback voltage from the tank to a threshold level in the processor and modify the pulse widths at the output of the processor accordingly.

摘要翻译： 用于调节交流电压源的系统具有一对P沟道MOSFET和一对桥式配置的N沟道MOSFET，其间具有电感器 - 电容器箱。 与反馈电路结合的处理器通过调制从处理器输出的信号的脉冲宽度并且将其用作MOSFET的栅极的输入来调节传输到储存器的能量。 通过增加或减少传输到MOSFET的各种栅极的脉冲宽度，处理器增加或减少传输到罐的能量。 反馈电路连接在储罐和处理器之间，使得处理器可以将来自储罐的反馈电压与处理器中的阈值水平进行比较，并相应地修改处理器输出端的脉冲宽度。