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    Low cost 2D position measurement system and method
    1.
    发明授权
    Low cost 2D position measurement system and method 有权

    公开(公告)号：US06545751B2

    公开(公告)日：2003-04-08

    申请号：US09791736

    申请日：2001-02-26

    申请人： Sean Beliveau ,  Edward R. Barrientos ,  Yvan Beliveau ,  Thomas M. Hedges ,  Eric J. Lundberg ,  Edmund S. Pendleton ,  Timothy Pratt ,  Rick Slater ,  Michael J. Sobel

    发明人： Sean Beliveau ,  Edward R. Barrientos ,  Yvan Beliveau ,  Thomas M. Hedges ,  Eric J. Lundberg ,  Edmund S. Pendleton ,  Timothy Pratt ,  Rick Slater ,  Michael J. Sobel

    IPC分类号： G01B1126

    CPC分类号： G01S5/16 ,  G01C15/002 ,  G01S1/70

    摘要： An improved low cost theodolite position measurement system and process which is particularly useful in enabling a single operator to conveniently set up the system and calculate elevation (el) and azimuth (az) angle data. Only a single optical transmitter is positioned within a predetermined workspace thus significantly decreasing equipment costs and setup time. The single transmitter is positioned and leveled at a predetermined point in the workspace. In operation the single rotatably mounted transmitter head illuminates the workspace volume with a pair of spaced apart precalibrated fan beams which sweep the space and a periodically emitted reference strobe pulse. At least one optical receiver is selectively positionable within said workspace so that during each revolution of said single transmitter head said receiver receives a first position strike and a second position strike of said fan beams. To determine elevation angle data, tracker logic means responsive to said receiver determines a first tie interval separation between receiving said first position strike and said second position strike and calculation means for converting said first time separation interval into an elevation angle data. To determine an azimuth angle data said receiver receives a strobe pulse and a fan beam position strike, both of which are repeatedly transmitted with a known periodicity, determining a measure of time separation related to the strobe pulse and the position strike, and converting the measure of time separation into the azimuth angle data utilizing the known periodicity.

    Spatial positioning and measurement system
    3.
    发明授权
    Spatial positioning and measurement system 失效
    空间定位与测量系统

    公开(公告)号：US5110202A

    公开(公告)日：1992-05-05

    申请号：US636459

    申请日：1990-12-31

    申请人： Andrew W. Dornbusch ,  Yvan J. Beliveau ,  Eric J. Lundberg ,  Timothy Pratt

    发明人： Andrew W. Dornbusch ,  Yvan J. Beliveau ,  Eric J. Lundberg ,  Timothy Pratt

    IPC分类号： G01C15/00 ,  G01S1/70 ,  G01S5/16

    CPC分类号： G01C15/002 ,  G01S1/70 ,  G01S5/16

    摘要： A spatial positioning and measurement system provides three-dimensional position and/or measurement information of an object using one or more fixed referent station systems, and one or more portable position sensor systems. Each fixed station produces at least one primary laser beam which is rotated at a constant angular velocity about a vertical axis. The primary laser beam has a predetermined angle of divergence or angle of spread which is inclined at a predetermined angle from the vertical axis. Each fixed station also preferably includes at least one reflective surface for generating a secondary laser beam.The portable position sensor includes a light sensitive detector, computer, and a display. The light sensitive detector can be formed of at least one "axicon" which directs incoming light to a photosensitive detector. The photosensitive detector generates an electrical pulse when struck by crossing laser beam and sends this pulse to the computer. The computer time labels each received pulse, which corresponds to the time of a laser beam crossing the axicon.For any point which is crossed by the two laser beams, a horizontal angle can be determined from the time difference between the time of crossing of the primary and reflected laser beam. Once these horizontal angles are known for three fixed referent stations, the point of intersection of three planes, and thus the three dimensional position of the point, is determined. Q A C

    Spatial positioning system
    4.
    发明授权
    Spatial positioning system 失效
    空间定位系统

    公开(公告)号：US5294970A

    公开(公告)日：1994-03-15

    申请号：US755780

    申请日：1991-09-06

    申请人： Andrew W. Dornbusch ,  Eric J. Lundberg ,  Yvan J. Beliveau ,  Timothy Pratt

    发明人： Andrew W. Dornbusch ,  Eric J. Lundberg ,  Yvan J. Beliveau ,  Timothy Pratt

    IPC分类号： G01C15/00 ,  G01S1/70 ,  G01S5/16 ,  G01S7/481 ,  G01B11/26 ,  G01C3/00

    CPC分类号： G01C15/002 ,  G01S1/70 ,  G01S5/16 ,  G01S7/4813

    摘要： A spatial positioning system includes fixed referent stations which emit rotating, divergent laser beams and a portable reflector. Each fixed station also includes a detector and a processor. The portable reflector may include retroreflectors or transponders. When the rotation of the laser beam is such that it is in line with a portable reflector, the transmitted laser beam is reflected off the portable reflector and received at the fixed receiver. For any point which is crossed by the fanned laser beams of a fixed station, a horizontal angle can be determined. Once these horizontal angles are known for three fixed stations, the point of intersection of three planes, and thus the three-dimensional position of the point, is determined.

    摘要翻译： 空间定位系统包括发射旋转，发散的激光束和便携式反射器的固定指示站。 每个固定站还包括检测器和处理器。 便携式反射器可以包括后向反射器或转发器。 当激光束的旋转使其与便携式反射器一致时，透射的激光束从便携式反射器反射并在固定的接收器处被接收。 对于由固定台的扇形激光束穿过的任何点，可以确定水平角度。 一旦三个固定站已知这些水平角度，就确定三个平面的交点，从而确定点的三维位置。

    Transmitter and receiver units for spatial position measurement system
    5.
    发明授权
    Transmitter and receiver units for spatial position measurement system 失效
    用于空间位置测量系统的发射器和接收器单元

    公开(公告)号：US5461473A

    公开(公告)日：1995-10-24

    申请号：US123891

    申请日：1993-09-20

    申请人： Timothy Pratt ,  Andrew W. Dornbusch ,  Yvan J. Beliveau ,  Eric J. Lundberg ,  Michael H. Sweeney

    发明人： Timothy Pratt ,  Andrew W. Dornbusch ,  Yvan J. Beliveau ,  Eric J. Lundberg ,  Michael H. Sweeney

    IPC分类号： G01C15/00 ,  G01S1/70 ,  G01S5/16 ,  G01S7/481 ,  G01S17/89 ,  G01B11/26 ,  G02B3/02 ,  H01J40/14

    CPC分类号： G01S17/89 ,  G01C15/002 ,  G01S1/70 ,  G01S5/16 ,  G01S7/4813

    摘要： Improved transmitter and receiver units for use in spatial measurement system that are easy and inexpensive to manufacture while providing a high degree of reliability are disclosed. Specifically, the laser transmitter includes a laser emitter, a bearing/motor assembly coupled to the laser emitter, the bearing/motor assembly including a rotatable hollow spindle shaft through which a laser beam generated by the laser emitter passes and a motor for driving the spindle shaft, a prism assembly coupled to the spindle shaft, wherein the prism assembly divides the laser beam generated by the laser emitter into a pair of fanned laser beams, and reflecting means for reflecting the fanned laser beams generated by the prism assembly as counter-rotating fanned laser beams. The receiver unit preferably includes at least one optical receiver coupled to an extension member, a processing unit coupled to the optical receiver, and a receiver interface coupled to the processing unit.

    摘要翻译： 公开了用于空间测量系统的改进的发射机和接收机单元，其在提供高可靠性的同时制造容易且便宜。 具体地，激光发射器包括激光发射器，耦合到激光发射器的轴承/马达组件，所述轴承/马达组件包括可旋转的中空心轴，由激光发射器产生的激光束穿过激光发射器通过，以及用于驱动主轴的马达 轴，连接到主轴的棱镜组件，其中棱镜组件将由激光发射器产生的激光束分成一对扇形激光束，以及用于将由棱镜组件产生的扇形激光束反射作为反向旋转的反射装置 扇形激光束。 接收器单元优选地包括耦合到扩展构件的至少一个光学接收器，耦合到光学接收器的处理单元以及耦合到处理单元的接收器接口。