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Handheld laser light detector with height correction, using a GPS receiver to provide two-dimensional position data

一种激光接收器、激光的技术，应用在高度/水平测量、仪器、测量装置等方向，达到精确三维位置定位的效果

Active Publication Date: 2009-07-22
TRIMBLE NAVIGATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical limitations in GPS receivers, vertical accuracy is at least one of two factors worse than accuracy in a plane parallel to the Earth's surface

Method used

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  • Handheld laser light detector with height correction, using a GPS receiver to provide two-dimensional position data
  • Handheld laser light detector with height correction, using a GPS receiver to provide two-dimensional position data
  • Handheld laser light detector with height correction, using a GPS receiver to provide two-dimensional position data

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Embodiment Construction

[0031] Reference is now made in detail to the presently preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like numerals indicate like elements throughout the views.

[0032] The present invention is conceived to address some of the drawbacks of the approaches described in the Background of the Invention above. The present invention uses a laser distance meter ("LDM") as part of the device, which measures the distance from the plane of the laser to the point to be measured. Several embodiments of the invention are discussed below, and include modifications that relax some of the strict requirements of the conventional approach. By using receiver technology that allows precise measurement of the location of the laser strike over a large receiving range, the user is relieved of the need to hold the receiver exactly on the iso-position. By using the internal gravity reference, the user is relieved of the necess...

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PUM

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Abstract

A laser light receiver is provided with an integral laser distance measurement (LDM) device for measuring the distance from a laser plane of a desired elevation to a desired physical target point to be measured on a jobsite. The laser receiver can be combined with a gravity reference device, so that the laser receiver does not necessarily have to be held plumb to a desired target point, when determining the relative elevation of the laser receiver between a rotating beam of laser light and the target point; it can also acquire multiple samples of positions and automatically take a vertical measurement and store that result for later readout. The laser receiver can be further combined with a GPS receiver, to acquire latitude and longitude data, and then in combination act as a three-dimensional transducer that is more accurate in the vertical direction than a GPS receiver alone is capable of.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Provisional Patent Application Serial No. 60 / 830,282, filed July 12, 2006, entitled "HANDHELD LASERLIGHT DETECTOR WITH HEIGHT CORRECTION"; DETECTOR WITH HEIGHTCORRECTION, USING A GPS RECEIVER TO PROVIDETWO-DIMENSIONAL POSITION DATA" is the priority of Provisional Patent Application Serial No. 60 / 906,362. technical field [0003] The present invention relates generally to laser receivers, and is particularly concerned with laser receivers of the type used on construction sites for measuring relative heights. The present invention is expressly disclosed as a laser receiver incorporating an automatic altitude correction capability, detectable by a combination of a laser distance measuring device and a gravity sensor or level detection device. The invention is also disclosed as a laser receiver with automatic altitude correction capability, and further combined with a global positioning s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00
CPCG01S17/023G01C15/002G01C15/004G01S17/86
Inventor R·G·康纳J·T·扎鲁斯基
Owner TRIMBLE NAVIGATION LTD