CN103234453A - Method for detecting geometric axis positional relation of special-shaped members based on spatial distance - Google Patents
Method for detecting geometric axis positional relation of special-shaped members based on spatial distance Download PDFInfo
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- CN103234453A CN103234453A CN2013101286143A CN201310128614A CN103234453A CN 103234453 A CN103234453 A CN 103234453A CN 2013101286143 A CN2013101286143 A CN 2013101286143A CN 201310128614 A CN201310128614 A CN 201310128614A CN 103234453 A CN103234453 A CN 103234453A
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- shaped component
- axial lines
- cloud data
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Abstract
The invention discloses a method for detecting geometric axis positional relation of special-shaped members based on a spatial distance. The method includes scanning the special-shaped members by two high-precision scanners to obtain point cloud data in any coordinate, performing point cloud matching, extracting and calculating axes of the two members, calculating distance d between the two axes, when satisfying, calculating an included angle of the two axes, comparing the included angle with a designed included angle to obtain errors, and judging whether the errors meet requirements or not. Geometric data of the special-shaped members are obtained by the aid of the three-dimensional laser scanners without contacting with the members, the point cloud data are processed by a computer, detection efficiency is high, and precision of the method is relatively high and can reach up to 0.02mm.
Description
Technical field
The invention belongs to and measure the detection technique field, be specifically related to a kind of detection method that concerns based on the special-shaped component geometrical axis position of space length.
Background technology
Special-shaped component is widely used in various building structure and engineering structure, as electric transmission pole tower, handling machinery, bridge, boats and ships, reaction tower etc.The physical dimension of special-shaped component is to judge whether qualified major parameter of special-shaped component, in some building structure and engineering structure (as angle steel structure iron tower of power transmission line, broadcasting television tower, microwave communication iron tower, transformer station's structure support of various electric pressures), this parameter has bigger influence to on-the-spot splicing smoothly and the performance of dependency structure.Therefore, need carry out precision to the physical dimension of special-shaped component detects and strict control.At present, also there is not suitable special-shaped component physical dimension accurate detecting method both at home and abroad.Practices well is the physical dimension of special-shaped component not to be carried out precision detect, and only detects roughly by classic method.
Summary of the invention
For addressing the above problem, the purpose of this invention is to provide a kind of detection method that concerns based on the special-shaped component geometrical axis position of space length, realize the on-the-spot high precision of special-shaped component physical dimension, obtain fast, determine the axis spatial relationship of special-shaped component, calculating axis angle value and design load compares, judge according to comparative result whether special-shaped component is qualified, thereby realize performance and the quality control of the accurate detection of special-shaped component physical dimension and various structures.
The apprizing system of sample treatment plant reaches above-mentioned technique effect for realizing above-mentioned technical purpose, and the present invention is achieved through the following technical solutions:
Detection method based on the special-shaped component geometrical axis position of space length relation may further comprise the steps:
Step 1) selects two high-precision three-dimensional laser scanners staggered relatively, and special-shaped component to be detected is positioned over arbitrarily between the two on the lifting table;
Step 2) target is set, sets up member designs Value Data storehouse;
Step 3) utilizes three-dimensional laser scanner that special-shaped component is scanned by the lifting table lifting, obtains the cloud data under the special-shaped component arbitrary system, the form of cloud data be (
)
Step 4) utilizes the sphere centre coordinate of target ball as the reference mark according to the target that arranges, and the cloud data of two scanners is mated, and the coordinate of two scanners is unified;
Step 5) is extracted the cloud data at member 1 place, its coordinate be (
)
, the cloud data of two place's differing heights sections of extraction member 1 utilizes the cloud data on the cross section to obtain the virtual point cloud coordinate in the center of circle of cross section circle by principle of least square match
,
, these 2 in theory should be on the axis of member 1;
Step 6) repeating step 4) and step 5), but member 2 axis are obtained in match
Last 2 virtual point cloud coordinates
,
Step 9) is utilized
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, utilize
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, the vector of 2 lines is
,
With
The space length of two axial lines is made as
, calculate
When step 10) intersects when two axial lines, then
, consider that member adds the allowable tolerance in man-hour, gives
A limit is poor, judges
Whether satisfy
, think then that when satisfying two axial lines intersects, wherein
The precision of value and industrial components production tolerance and selected three-dimensional laser scanner is relevant,
When step 11) intersects when two axial lines, ask the two axial lines intersection point
, each is got a bit on two axial lines
,
, obtain
Distance be respectively
, the angle of calculating two axial lines is
, compare with design load, according to error requirements, can judge whether special-shaped component 1 is qualified with the physical dimension of special-shaped component 2.
The invention has the beneficial effects as follows:
The present invention utilizes three-dimensional laser scanner to obtain the geometric data of special-shaped component, need not contact member itself, and Point Cloud Processing is utilized computer realization, its detection efficiency height, and precision height of the present invention is comparatively speaking, reaches as high as 0.02mm.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention describe in detail as after.The specific embodiment of the present invention is provided in detail by following examples.
Embodiment
Below in conjunction with embodiment, describe the present invention in detail.
Detection method based on the special-shaped component geometrical axis position of space length relation may further comprise the steps:
Step 1) selects two high-precision three-dimensional laser scanners staggered relatively, and special-shaped component to be detected is positioned over arbitrarily between the two on the lifting table;
Step 2) target is set, sets up member designs Value Data storehouse;
Step 3) utilizes three-dimensional laser scanner that special-shaped component is scanned by the lifting table lifting, obtains the cloud data under the special-shaped component arbitrary system, the form of cloud data be (
)
Step 4) utilizes the sphere centre coordinate of target ball as the reference mark according to the target that arranges, and the cloud data of two scanners is mated, and the coordinate of two scanners is unified;
Step 5) is extracted the cloud data at member 1 place, its coordinate be (
)
, the cloud data of two place's differing heights sections of extraction member 1 utilizes the cloud data on the cross section to obtain the virtual point cloud coordinate in the center of circle of cross section circle by principle of least square match
,
, these 2 in theory should be on the axis of member 1;
Step 6) repeating step 4) and step 5), but member 2 axis are obtained in match
Last 2 virtual point cloud coordinates
,
Step 9) is utilized
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, utilize
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, the vector of 2 lines is
,
With
The space length of two axial lines is made as
, calculate
When step 10) intersects when two axial lines, then
, consider that member adds the allowable tolerance in man-hour, gives
A limit is poor, judges
Whether satisfy
, think then that when satisfying two axial lines intersects, wherein
The precision of value and industrial components production tolerance and selected three-dimensional laser scanner is relevant,
When step 11) intersects when two axial lines, ask the two axial lines intersection point
, each is got a bit on two axial lines
,
, obtain
Distance be respectively
, the angle of calculating two axial lines is
, compare with design load, according to error requirements, can judge whether special-shaped component 1 is qualified with the physical dimension of special-shaped component 2, and the component portion that detection is finished divides mark follow-up continuous detection other parts, and parameter can be drawn by above-mentioned steps.
The above only for the preferred embodiment of invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. based on the detection method of the special-shaped component geometrical axis position of space length relation, it is characterized in that, may further comprise the steps:
Step 1) selects two high-precision three-dimensional laser scanners staggered relatively, and special-shaped component to be detected is positioned over arbitrarily between the two on the lifting table;
Step 2) target is set, sets up member designs Value Data storehouse;
Step 3) utilizes three-dimensional laser scanner that special-shaped component is scanned by the lifting table lifting, obtains the cloud data under the special-shaped component arbitrary system, the form of cloud data be (
)
Step 4) utilizes the sphere centre coordinate of target ball as the reference mark according to the target that arranges, and the cloud data of two scanners is mated, and the coordinate of two scanners is unified;
Step 5) is extracted the cloud data at member 1 place, its coordinate be (
)
, the cloud data of two place's differing heights sections of extraction member 1 utilizes the cloud data on the cross section to obtain the virtual point cloud coordinate in the center of circle of cross section circle by principle of least square match
,
, these 2 in theory should be on the axis of member 1;
Step 6) repeating step 4) and step 5), but member 2 axis are obtained in match
Last 2 virtual point cloud coordinates
,
Step 9) is utilized
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, utilize
Straight-line equation appoint and get
The virtual point cloud coordinate of going up any is designated as
, the vector of 2 lines is
,
With
The space length of two axial lines is made as
, calculate
When step 10) intersects when two axial lines, then
, consider that member adds the allowable tolerance in man-hour, gives
A limit is poor, judges
Whether satisfy
, think then that when satisfying two axial lines intersects, wherein
The precision of value and industrial components production tolerance and selected three-dimensional laser scanner is relevant,
When step 11) intersects when two axial lines, ask the two axial lines intersection point
, each is got a bit on two axial lines
,
, obtain
Distance be respectively
, the angle of calculating two axial lines is
, compare with design load, according to error requirements, can judge whether special-shaped component 1 is qualified with the physical dimension of special-shaped component 2.
Priority Applications (1)
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CN201310128614.3A CN103234453B (en) | 2013-04-15 | 2013-04-15 | Based on the detection method of the special-shaped component geometrical axis position relationship of space length |
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CN201310128614.3A CN103234453B (en) | 2013-04-15 | 2013-04-15 | Based on the detection method of the special-shaped component geometrical axis position relationship of space length |
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CN103234453A true CN103234453A (en) | 2013-08-07 |
CN103234453B CN103234453B (en) | 2015-11-18 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103438835A (en) * | 2013-08-23 | 2013-12-11 | 中联重科股份有限公司 | Plate bending angle detection device and method |
CN110553606A (en) * | 2019-08-26 | 2019-12-10 | 广州供电局有限公司 | method, device and equipment for monitoring horizontal axis difference of supporting type tubular bus of transformer substation |
CN111932528A (en) * | 2020-09-07 | 2020-11-13 | 广东明华机械有限公司 | Torpedo quality detection method and system based on visual identification |
Citations (4)
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US20040051711A1 (en) * | 1996-04-24 | 2004-03-18 | Jerry Dimsdale | Integrated system for quickly and accurately imaging and modeling three-dimensional objects |
CN101387494A (en) * | 2008-10-06 | 2009-03-18 | 天津大学 | Geometrical dimensional measurement apparatus and method for large-sized tunnel tunnel segment component |
CN101915558A (en) * | 2010-08-09 | 2010-12-15 | 重庆交通大学 | Geometric linear detection method of bridge member |
CN102494657A (en) * | 2011-12-12 | 2012-06-13 | 北京建筑工程学院 | Measuring head radius compensation method for curve surface profile measuring and detecting |
-
2013
- 2013-04-15 CN CN201310128614.3A patent/CN103234453B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040051711A1 (en) * | 1996-04-24 | 2004-03-18 | Jerry Dimsdale | Integrated system for quickly and accurately imaging and modeling three-dimensional objects |
CN101387494A (en) * | 2008-10-06 | 2009-03-18 | 天津大学 | Geometrical dimensional measurement apparatus and method for large-sized tunnel tunnel segment component |
CN101915558A (en) * | 2010-08-09 | 2010-12-15 | 重庆交通大学 | Geometric linear detection method of bridge member |
CN102494657A (en) * | 2011-12-12 | 2012-06-13 | 北京建筑工程学院 | Measuring head radius compensation method for curve surface profile measuring and detecting |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103438835A (en) * | 2013-08-23 | 2013-12-11 | 中联重科股份有限公司 | Plate bending angle detection device and method |
CN103438835B (en) * | 2013-08-23 | 2016-06-08 | 中联重科股份有限公司 | A kind of sheet metal bending angle detection device and method |
CN110553606A (en) * | 2019-08-26 | 2019-12-10 | 广州供电局有限公司 | method, device and equipment for monitoring horizontal axis difference of supporting type tubular bus of transformer substation |
CN111932528A (en) * | 2020-09-07 | 2020-11-13 | 广东明华机械有限公司 | Torpedo quality detection method and system based on visual identification |
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