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Target, base and reference meter for calibrating spatial coordinate measuring system of electronic theodolite

An electronic theodolite and space coordinate technology, applied in radio wave measurement systems, measuring devices, instruments, etc., can solve problems such as the inconvenience of carrying the reference ruler, the inability to meet the calibration requirements of the electronic theodolite system, and the inaccuracy of calibration values.

Active Publication Date: 2010-02-24
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the reference ruler is a physical reference, its length should not be too large, generally within 3m. Otherwise, not only is it difficult to calibrate the reference ruler, but also when the environmental conditions such as temperature change or the ruler body is deformed, the calibration value will be inaccurate. Too long will cause inconvenience to carry
Therefore, this solution cannot meet the calibration requirements of the electronic theodolite system in the range of tens of meters
[0015] So far, there is no other report on the calibration of electronic theodolite space three-dimensional coordinate measurement at home and abroad

Method used

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  • Target, base and reference meter for calibrating spatial coordinate measuring system of electronic theodolite
  • Target, base and reference meter for calibrating spatial coordinate measuring system of electronic theodolite
  • Target, base and reference meter for calibrating spatial coordinate measuring system of electronic theodolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The target is to cut a steel ball with a radius of 30mm into the depth of five-eighths of the maximum truncation plane, and then cut along the direction of 120° with the maximum truncation plane to form a spherical segment, such as figure 1 As shown, where R is the radius of the sphere, Z is the distance between the intersection line of the two cutting surfaces and the center of the sphere, and ∠A is the angle between the two cutting surfaces.

[0043] The spherical part is screened, the height of the central spherical crown is the size of the radius, and the tolerance range is within -0.02mm~-0.05mm.

[0044] A paper circular target is pasted on the plane passing through the center of the ball, and the pattern of the paper circular target is three concentric circles with cross lines drawn in the center. The central circle has a diameter of 1mm and a line width of 0.4mm, the second circle has a diameter of 8mm and a line width of 1mm, the outer circle has a diameter of...

Embodiment 2

[0051] It is a hemispherical target, which is formed by cutting half of a steel ball with a radius of 30mm, such as image 3 Shown, where R is the radius of the ball.

[0052] The hemisphere is screened, the crown height of the center sphere is the size of the radius, and the tolerance range is within -0.02mm to -0.05mm.

[0053] A paper circular target is pasted on the plane passing through the center of the ball, and the pattern of the paper circular target is three concentric circles with cross lines drawn in the center. The central circle has a diameter of 1mm and a line width of 0.4mm, the second circle has a diameter of 8mm and a line width of 1mm, the outer circle has a diameter of 16mm and a line width of 3mm, the concentricity of the three circles is less than 0.003mm, and the central cross line is 20mm long and 0.2mm wide mm.

[0054] In this process, it is necessary to find the center of the target under the universal tool microscope, and use special tooling to en...

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Abstract

The invention discloses a target, a base and a reference meter for calibrating a spatial coordinate measuring system of an electronic theodolite, which aim to meet the need that the measuring system of the electronic theodolite calibrates in the range of tens of meters in any direction at an angle of horizontal 360 DEG and pitching + / -45 DEG, wherein the target is a hemisphere or a spherical segment formed by linear cutting processing of a bearing steel ball, and comprises an end surface pasted with a paper annular mark; the base is used for the placement of the target; and the reference meteris used for arranging the target. The target, the base and the reference meter meet the need that the measuring system of the electronic theodolite calibrates in the range of tens of meters in any direction at the angle of horizontal 360 DEG and pitching + / -45 DEG; and a coordinate value of a reference point applied to calibration can be corrected in real time by instruments with higher precisionsuch as a laser radar scanner to ensure high calibration accuracy and reduce the dependence on the environment of a reference placement point.

Description

technical field [0001] The invention relates to a target, a base and a reference ruler for calibrating a geometric measuring instrument, in particular to a target, a base and a reference ruler for calibrating a large-scale space measuring instrument such as an electronic theodolite coordinate measuring system. Background technique [0002] There are many types of large-scale spatial measurement instruments, including theodolite measurement system, laser measurement system, photogrammetry system, etc. The measurement principles of various instruments are different, and different measurement principles lead to different methods for evaluating their measurement accuracy. Therefore, large-scale spatial measurement Calibration of instruments has long had no fully formed standards. [0003] In the national "JJG425-2003 Optical Theodolite Verification Regulations" and "JJG100-2003 Total Station Electronic Speed ​​Meter Verification Regulations", the calibration of the angle measure...

Claims

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Application Information

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IPC IPC(8): G01B7/00G01C25/00G01S7/40
Inventor 刘勇沈兆欣陈晓晖方芳殷晴贺燕
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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