公开(公告)号：US3772503A

公开(公告)日：1973-11-13

申请号：US3772503D

申请日：1972-11-22

Applicant: LAITRAM CORP

Inventor： FOWLER J

IPC: G01C17/26 ,  G01C17/02 ,  G06F15/50

CPC classification number: G01C17/26

Abstract: Logic circuitry for use with a digital compass for providing an output indication of the difference between an actual and an intended course. Digital signals provided by a digital compass are processed in conjunction with a digital signal representation of intended course position to provide an output signal representing course difference and which can be employed by display or automatic pilot apparatus.

Abstract translation: 与数字罗盘一起使用的逻辑电路，用于提供实际和预期课程之间差异的输出指示。 由数字罗盘提供的数字信号与预期路线位置的数字信号表示一起处理，以提供表示路线差异的输出信号，并且可由显示或自动驾驶仪使用。

公开(公告)号：US3746842A

公开(公告)日：1973-07-17

申请号：US3746842D

申请日：1971-09-27

Applicant: LAITRAM CORP

Inventor： FOWLER J

IPC: G01C17/26 ,  H03M1/28 ,  H03M1/56 ,  G06M1/272

CPC classification number: G01C17/26 ,  H03M1/285 ,  H03M1/56

Abstract: A magnetic compass in which the compass card and gimbal mounting are all located inside a sealed enclosure filled with damping fluid. The compass card is digitally coded and photoelectric means are provided for reading the card and generating a digital number corresponding to the rotational position of the card relative to the enclosure, corrected for local magnetic variation. Means are provided for comparing the compass reading with the corrected course reading to provide an error signal or an off-course alarm if desired.

Abstract translation: 指南针卡和万向节安装件都位于密封的外壳内的磁罗盘，内部装有阻尼液。 指南针卡被数字编码，并且提供光电装置用于读取卡并产生对应于卡相对于外壳的旋转位置的数字号码，以对局部磁性变化进行校正。 提供了用于将罗盘读数与校正过程读数进行比较以提供错误信号或者如果需要的非进程报警的装置。

公开(公告)号：US3824587A

公开(公告)日：1974-07-16

申请号：US30077172

申请日：1972-10-25

Applicant: LAITRAM CORP

Inventor： FOWLER J

IPC: H03M1/24 ,  G01D5/249 ,  H03M1/00 ,  G08C9/08

CPC classification number: H03M1/30

Abstract: An angle encoder for selectively providing from a single rotatable code element an output indication of the angular position of the rotatable element and of angular deviation and sense with respect to a reference position. A Gray coded code element is employed and from which a Gray code is sensed to provide digital signals which are processed by associated logic circuitry operative in two modes. In one mode an output indication is provided of the angular position of the code element, while in a second mode an output indication is provided of the extent and sense of angular deviation of the code element.

Abstract translation: 角度编码器，用于从单个可旋转代码元件选择性地提供可旋转元件的角位置的输出指示以及相对于参考位置的角度偏差和感测。 使用灰色编码代码元素，并从其中感测到格雷码，以提供数字信号，这些数字信号由以两种模式操作的关联逻辑电路处理。 在一种模式中，提供了代码元素的角位置的输出指示，而在第二模式中，为代码元素的角度偏差的程度和感觉提供了输出指示。