CN101368819A - Photoelectric measurement method for macrotype platform deflection - Google Patents
Photoelectric measurement method for macrotype platform deflection Download PDFInfo
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- CN101368819A CN101368819A CNA2008101511920A CN200810151192A CN101368819A CN 101368819 A CN101368819 A CN 101368819A CN A2008101511920 A CNA2008101511920 A CN A2008101511920A CN 200810151192 A CN200810151192 A CN 200810151192A CN 101368819 A CN101368819 A CN 101368819A
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Abstract
The invention discloses a photoelectric measurement method for measuring the large-scale platform deformation; wherein, the location information received by a plurality of CCD line array image sensors vertically arranged on the location under measurement on the platform is taken as the relative elevation information of the point and outputted to a computer; the elevation information location points received by any two or three CCD line array image sensors are considered as the baseline or the datum plane, and all the elevation information is transformed into elevation output values; finally, the elevation output value data under different load conditions and at different moments are compared to obtain the relative deformation data of the platform under different load conditions and at different moments. The invention can greatly enhance the large-scale platform deformation measurement accuracy and has rapid measurement speed as well as high degree of automation.
Description
Technical field
The present invention relates to a kind of measuring method, particularly a kind of measuring method of real-time monitoring macrotype platform deflection.
Background technology
Platform of the present invention is meant the platform that special concern is arranged for deflection, is meant that especially deflection has the comparatively complicated optic test platform of considerable influence to its usability.
Current a lot of for all kinds of platform deflection automatic monitoring method kinds, mechanical type, magneto-electric, optical profile type, photo-electric etc. are arranged.The mechanical type measuring method is a typical method with the card metering method of all kinds of slide calliper rule, and the magneto-electric measuring method is by the magnetoelectricity method displacement to be converted to electric signal to write down measurement.The optical means that is used for linear measurement mainly contains two classes: (1) adopts optical interference or imaging to amplify the full imaging amplification method that very precision measurement is carried out in small size or little displacement; (2) use the alignment telescope of band annex and the local amplification method that optical projection system is measured large scale.Current photoelectric type measuring method then mainly is that object to be measured is carried out carrying out image interpretation after the image acquisition, obtains parameter to be measured.
The mechanical type measuring method will become very difficult for the measurement of large scale (yardstick more than several meters) and some inconvenient object that contacts or be difficult to contact; Owing to be difficult to find measuring basis, causing platform deflection to be measured can't realize the magneto-electric measuring method for the large scale measuring object.The photoelectric type measuring method has many superior parts, but photoelectric type measuring method in the past mainly is that ccd sensor is used (still being accustomed in the industry so far ccd sensor is referred to as the CCD line scan image sensor) as imageing sensor, as application number is 200510017064.3 patented claim " based on the realtime deformation measuring device of video image ", carries out analyzing and processing after collecting the platform image by ccd sensor.Owing to the influence of the factors such as flat surface deformation measurement difficulty that imageing sensor is lower for large scale measuring object precision and the visual angle reason causes, cause the photoelectric type measuring method in large scale plane deformation amount is measured automatically and monitored, can't apply.
Summary of the invention
In order to overcome the deficiency that prior art can't be applied in large scale plane deformation amount is measured automatically and monitored, the invention provides the measuring method that a kind of suitable macrotype platform deflection detects in real time, the CCD line scan image sensor can be used for macrotype platform deflection as altitude scale and measure, solve in the past the macrotype platform deflection efficiency of measurement low, can't carry out deficiency such as the real-time monitoring of integral body.
The technical solution adopted for the present invention to solve the technical problems may further comprise the steps:
(1) several CCD line scan image sensors vertically is arranged in platform position to be measured as surveyors' staff towards light source, the level one word laser beam of one word line laser instrument is shone in the pixel array region of each CCD line scan image sensor simultaneously, and the positional information that each CCD line scan image sensor is received outputs in the computing machine as the relative altitude information of this point and handles.
A described word line laser instrument is a kind of laser instrument that the point-like laser wire harness of common lasers is modulated to a word slice shape laser wire harness by prism.
(2) line of the elevation information location point that certain two CCD line scan image sensor on the platform are received is as baseline, the elevation information that all CCD line scan image sensors receive all adopts the linear coordinate substitution method, changes the absolute altitude output valve that overlaps coordinate with baseline into.
The plane that the elevation information location point that this step also can receive certain CCD line scan image sensor of 3 on the platform is determined is as reference field, the elevation information that all CCD line scan image sensors receive all adopts the linear coordinate substitution method, changes the absolute altitude output valve that overlaps coordinate with reference field into.
(3) various different loads conditions, different absolute altitude output valve data are constantly compared, thereby obtain platform in various different loads conditions, relative deformation's data of difference between the moment.
In order to obtain platform deflection data under the Different Ground condition in motion process more easily, wireless output after the height and position information integration that the present invention can record each CCD line scan image sensor, above the platform motion scope, radio receiver is set, reaches computing machine after signal receives and handle.
The present invention can place platform one end with a word line laser instrument, a plurality of CCD line scan image sensors vertically are arranged in platform position to be measured as surveyors' staff along a certain axis, near linear distributes, slightly stagger, the visual-field beam that the distance that staggers is accepted with the CCD line scan image sensor surveyors' staff of dodging the back is as the criterion.Line with the elevation information location point of any two CCD line scan image sensors is a baseline, and relatively all the other each points obtain the deflection parameter on a certain axis of platform with respect to the elevation difference of this baseline.
The present invention also can place platform one end with a word line laser instrument, and a plurality of CCD line scan image sensors vertically are arranged in platform position to be measured as surveyors' staff, is not equidistant fan-shaped distribution as required.The plane of determining with the elevation information location point of any three CCD line scan image sensors is a reference field, and relatively all the other each points obtain the deflection parameter of platform with respect to the elevation difference of this reference field.
The invention has the beneficial effects as follows: measure owing to adopt the CCD line scan image sensor to be used for macrotype platform deflection, utilize the strong characteristics of CCD line scan image sensor pixel positional information, the elevation information that records is directly exported as altitude scale; Adopt a word line laser instrument to allow a plurality of CCD line scan image sensors receive same rectilinear light beam signal simultaneously, utilize the rectilinear propagation principle of light, particularly utilize the accurate rectilinear propagation principle of laser, formed the rectilinear light beam of stable and degree of precision; Thereby the present invention can improve the measuring accuracy of macrotype platform deflection greatly, and measuring speed is fast, the automaticity height.Deflection at certain large-scale optic test platform has been obtained good implementation result, the long 20m of test platform, wide 6m in the monitoring in real time, measured four road axis relative deformation of totally 36 measuring points, adopt the Mechanical Method correlation calibration, the measuring accuracy error≤± 0.1mm, sampling period≤1s.
The present invention is further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Among the figure, the 1-CCD line scan image sensor; The 2-platform; 3-one word line laser instrument; The 4-radio receiver; The 5-computing machine.
Embodiment
Method embodiment 1:
The large-scale optic test platform of certain packaged type is about 20m, wide about 6m.Any microdeformation of this test platform all may exert an influence to the measuring accuracy of the optical device arranged on the platform, and the distortion of platform is mainly derived from: the 1. platform distortion that the variation of ground flat degree produces platform under the Different Ground condition in moving process; 2. owing to the platform load that reason caused such as changing measuring equipment changes the platform distortion that causes.
For the influence of monitoring platform distortion in real time,, arranged the monitoring device in the inventive method along on the as far as possible close position of optical measurement axis of the flank of certain four main optical measurement axis to the measuring accuracy generation of optical device.
Arrange 8 CCD line scan image sensor measuring points separately on the every monitoring line, 1 one word line laser instrument measuring point, all measuring points all adopt magnetic bases to be fixed on the optic test platform body.One word line laser instrument measuring point is placed monitoring axis one end, and all the other each CCD line scan image sensor measuring points place on the monitoring axis on other position, and it is definite specifically to lay the position of being paid close attention to according to actual optic testing system itself position.Each measuring point near linear distributes, and attention should slightly be staggered, and may stop that to avoid CCD line scan image sensor itself follow-up surveyors' staff receives the situation of visual-field beam.
Accurately measurement monitors respectively that each monitoring point is along the spacing of monitoring optical axis on the axis, and substitution linear coordinate transformation system is standby.The positional information that each CCD line scan image sensor is received outputs in the computing machine as the relative altitude information of this point and handles, thereby obtains the relative altitude data of 9 measuring points of each road monitoring optical axis.The relative altitude data of one word line laser instrument measuring point can obtain by this linear coordinate conversion.
In order to obtain platform deflection data under the Different Ground condition in motion process more easily, the altitude signal that each CCD line scan image sensor is recorded transfers to the wireless transmit terminal by signal cable, the integrated wireless output in back.The appropriate location is provided with radio receiver above the platform motion scope, reaches computing machine after signal receives and handles.
Line with the elevation information location point of certain two CCD line scan image sensor is a baseline, and relatively all the other each points obtain the deflection parameter on a certain axis of platform with respect to the elevation difference of this baseline.According to actual needs relatively all the other each points in different loads condition, different altitude figures constantly elevation difference with respect to this baseline, thereby obtain each point on a certain axis of platform in various different loads conditions, different relative deformation's data between constantly.
The pixel spacing of the CCD line scan image sensor of selecting for use in the present embodiment is 14 μ m, with word line laser instrument live width 2-4mm in surveyed area.At four road axis of measuring among the relative deformation of totally 36 measuring points, by with the Mechanical Method correlation calibration, the measuring accuracy error≤± 0.1mm, sampling period≤1s.Deflection at the large-scale optic test platform of packaged type has been obtained good implementation result in the monitoring in real time.
Method embodiment 2:
Certain large-scale workbench is about 30m, and wide about 25m is furnished with precise control system on it.Platform might cause platform plane to produce deflection owing to the action of work system at work, thereby influences the control accuracy of control system.
For the monitoring platform deflection is to the influence of control system in real time, selected some measuring points have been arranged the monitoring device in the inventive method on platform, are used for the deflection of monitoring platform.23 measuring points of layouting altogether in the present embodiment, 1 one word line laser instrument measuring point wherein, 22 CCD line scan image sensor measuring points.1 one word line laser instrument measuring point places platform one end, 22 CCD line scan image sensor measuring points adopt fan-shaped be not equally spaced to be arranged in need on the platform to detect on the interested location point of deflection.All measuring points all adopt magnetic bases to be fixed on the optic test platform body.When arranging, each measuring point should note avoiding CCD line scan image sensor itself may stop that follow-up surveyors' staff receives the situation of visual-field beam.
Accurately measure the planimetric position coordinate of each monitoring point on platform, standby with substitution linear coordinate transformation system.The elevation location that each CCD line scan image sensor is received outputs in the computing machine as the relative altitude information of this point and handles, thereby obtains the relative altitude data of each measuring point.
The plane of determining with the elevation information location point of any three CCD line scan image sensors is a reference field, relatively all the other each points are in different loads condition, the different altitude figures constantly elevation difference with respect to this reference field, thereby obtain platform in various different loads conditions, different relative deformation's data between constantly.The relative altitude data of one word line laser instrument measuring point can obtain by this linear coordinate conversion.
The pixel spacing of the CCD line scan image sensor of selecting for use in the present embodiment is 14 μ m, with word line laser instrument live width 2-4mm in surveyed area.In the relative deformation of 23 measuring points measuring, by with the Mechanical Method correlation calibration, the measuring accuracy error≤± 0.1mm, sampling period≤1s.Deflection at large-scale precision Control work platform has been obtained good implementation result in the monitoring in real time.
Claims (6)
1. the photoelectric measurement method of macrotype platform deflection is characterized in that comprising the steps:
(a) several CCD line scan image sensors vertically are arranged in platform position to be measured as surveyors' staff towards light source, the level one word laser beam of one word line laser instrument is shone in the pixel array region of each CCD line scan image sensor simultaneously, and the positional information that each CCD line scan image sensor is received outputs in the computing machine as the relative altitude information of this point and handles;
(b) line of the elevation information location point that certain two CCD line scan image sensor on the platform are received is as baseline, the elevation information that all CCD line scan image sensors receive all adopts the linear coordinate substitution method, changes the absolute altitude output valve that overlaps coordinate with baseline into;
(c) various different loads conditions, different absolute altitude output valve data are constantly compared, thereby obtain platform in various different loads conditions, relative deformation's data of difference between the moment.
2. the photoelectric measurement method of macrotype platform deflection according to claim 1, it is characterized in that: a described word line laser instrument is a kind of laser instrument that the point-like laser wire harness of common lasers is modulated to a word slice shape laser wire harness by prism.
3. the photoelectric measurement method of macrotype platform deflection according to claim 1, it is characterized in that: the plane that the elevation information location point that described step (b) receives certain CCD line scan image sensor of 3 on the platform is determined is as reference field, the elevation information that all CCD line scan image sensors receive all adopts the linear coordinate substitution method, changes the absolute altitude output valve that overlaps coordinate with reference field into.
4. the photoelectric measurement method of macrotype platform deflection according to claim 1, it is characterized in that: wireless output after the height and position information integration that described each CCD line scan image sensor records, above the platform motion scope, radio receiver is set, reaches computing machine after signal receives and handle.
5. the photoelectric measurement method of macrotype platform deflection according to claim 1, it is characterized in that: described step (a) places platform one end with a word line laser instrument, a plurality of CCD line scan image sensors vertically are arranged in platform position to be measured as surveyors' staff along a certain axis, near linear distributes, slightly stagger, the visual-field beam that the distance that staggers is accepted with the CCD line scan image sensor surveyors' staff of dodging the back is as the criterion.
6. the photoelectric measurement method of macrotype platform deflection according to claim 1, it is characterized in that: described step (a) places platform one end with a word line laser instrument, a plurality of CCD line scan image sensors vertically are arranged in platform position to be measured as surveyors' staff, are not equidistant fan-shaped distribution as required.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810151192A CN100590382C (en) | 2008-09-28 | 2008-09-28 | Large sized platform deflection amount photoelectric measuring method |
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| CN200810151192A CN100590382C (en) | 2008-09-28 | 2008-09-28 | Large sized platform deflection amount photoelectric measuring method |
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| CN101368819A true CN101368819A (en) | 2009-02-18 |
| CN100590382C CN100590382C (en) | 2010-02-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519742A (en) * | 2011-11-21 | 2012-06-27 | 中联重科股份有限公司 | Method and system for detecting faults of cantilever as well as crane |
| CN103307991A (en) * | 2013-06-09 | 2013-09-18 | 上海湃通机电设备有限公司 | Optical measuring mechanism of non-contact rotary cylindrical product diameter measuring device |
| CN104236407A (en) * | 2013-06-14 | 2014-12-24 | Ap系统股份有限公司 | Method for correcting platform scaleplate |
| CN105674940A (en) * | 2014-11-19 | 2016-06-15 | 中国航空工业集团公司西安飞机设计研究所 | Large-scale antenna-feeder system mounting point deflection determination method |
| CN106056107A (en) * | 2016-07-28 | 2016-10-26 | 福建农林大学 | Pile avoiding control method based on binocular vision |
| CN110284529A (en) * | 2018-03-19 | 2019-09-27 | 天津大学（青岛）海洋工程研究院有限公司 | Foundation deformation measurement method and device in larger hydrocarbon platform construction |
-
2008
- 2008-09-28 CN CN200810151192A patent/CN100590382C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519742A (en) * | 2011-11-21 | 2012-06-27 | 中联重科股份有限公司 | Method and system for detecting faults of cantilever as well as crane |
| CN103307991A (en) * | 2013-06-09 | 2013-09-18 | 上海湃通机电设备有限公司 | Optical measuring mechanism of non-contact rotary cylindrical product diameter measuring device |
| CN104236407A (en) * | 2013-06-14 | 2014-12-24 | Ap系统股份有限公司 | Method for correcting platform scaleplate |
| CN104236407B (en) * | 2013-06-14 | 2017-10-10 | Ap系统股份有限公司 | The method of dressing plate scale |
| CN105674940A (en) * | 2014-11-19 | 2016-06-15 | 中国航空工业集团公司西安飞机设计研究所 | Large-scale antenna-feeder system mounting point deflection determination method |
| CN106056107A (en) * | 2016-07-28 | 2016-10-26 | 福建农林大学 | Pile avoiding control method based on binocular vision |
| CN106056107B (en) * | 2016-07-28 | 2021-11-16 | 福建农林大学 | Pile avoidance control method based on binocular vision |
| CN110284529A (en) * | 2018-03-19 | 2019-09-27 | 天津大学（青岛）海洋工程研究院有限公司 | Foundation deformation measurement method and device in larger hydrocarbon platform construction |
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| CN100590382C (en) | 2010-02-17 |
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