CN104897077B - Self-adapting detecting system and method for the high speed zoom camera to curved surface profile line - Google Patents
Self-adapting detecting system and method for the high speed zoom camera to curved surface profile line Download PDFInfo
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- CN104897077B CN104897077B CN201510190691.0A CN201510190691A CN104897077B CN 104897077 B CN104897077 B CN 104897077B CN 201510190691 A CN201510190691 A CN 201510190691A CN 104897077 B CN104897077 B CN 104897077B
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Abstract
A kind of self-adapting detecting system and method the invention discloses high speed zoom camera to curved surface profile line, including standard flat mirror, high speed zooming camera system, closed loop straight pulse stepping slide unit, lighting source, height adjustable connecting bracket, control system, between the system that standard flat mirror is made up of in the form of contacting between closed loop straight pulse stepping slide unit and high speed zooming camera system connecting bracket, high speed zooming camera system includes the various forms of lens with high-speed response and zoom rate, image capturing system and driving control system, the control system of the closed loop straight pulse stepping slide unit and the driving control system comprehensive integration of high speed zooming camera system, and sampling is driven to target profile curve to be detected with reference to data processing function, processing and comprehensive analysis.
Description
Technical field
The present invention relates to the non-contact detection field of curved surface profile line, and in particular to a kind of high speed zoom camera is to curved surface
The self-adapting detecting system and method for contour line.
Background technology
Many optical profilometers can not detect big steepness curved surface because the constraint of depth of field problem and normal direction detection limits at present,
And although some laser displacement sensors have certain normal direction detection drift angle permissibility, but can not be automatic during on-line checking
Orientation is adjusted, causes final measurement error also larger.In addition, these instruments all have the characteristics of cost is high.This method is using high
Fast zooming camera system realizes axial high speed varifocal picture collection to the contour line sampled point of curved surface particular path to be measured, then
According to corresponding to becoming focus on picture pixel data sharpening effect, extract the picture corresponding to most clear pixel；It is burnt to calculate this
Coordinate data of the pixel relative to high speed zooming camera system is put, and closed loop straight pulse is adaptively driven according to processing speed
Stepping slide unit, it is determined that the collection away from target data in next step, is finally completed the collection and processing of contoured line；Finally, pass through
Contour line and the abatement of reference contour data are detected, obtains true objective contour curve to be checked, and then to curved surface wheel to be detected
Profile and gained curved surface carry out evaluation analysis.
The content of the invention
To solve the above problems, the invention provides a kind of high speed zoom camera to the self-adapting detecting system of curved surface profile line
System and method, for the high-speed adaptive detectability of the target point data of big steepness curved surface particular depth of view, deflected without optical axis
Into in the range of measured surface normal direction or angle permissibility, without adjusting height focal length, the artificial mistake in continuous measurement process is eliminated
Difference；There are low cost and other advantages in terms of instrument application.
To achieve the above object, the technical scheme taken of the present invention is：
High speed zoom camera is to the self-adapting detecting system of curved surface profile line, including standard flat mirror, high speed zoom camera
System, closed loop straight pulse stepping slide unit, lighting source, height adjustable connecting bracket, control system, can be realized to mesh to be measured
The high-speed adaptive detection of contoured line, standard flat mirror become between closed loop straight pulse stepping slide unit and at a high speed on mark song face
Between system of the burnt camera system by the adjustable connecting bracket composition of high speed, and standard flat mirror is slided with the stepping of closed loop straight pulse
Platform contacts, and plays a part of providing examination criteria for measuring system, high speed zooming camera system includes various forms of with height
Speed response and lens, image capturing system and the driving control system of zoom rate, enter in uniform, stabilized light source to test position
On the premise of row illumination, high speed zooming camera system can collect the related data of measured surface up-sampling point.The closed loop
The control system of straight pulse stepping slide unit and the driving control system comprehensive integration of high speed zooming camera system, and combine data
Processing function is driven sampling, processing and comprehensive analysis to target profile curve to be detected.
To solve the above problems, the embodiment of the present invention additionally provides a kind of high speed zoom camera to the adaptive of curved surface profile line
Detection method is answered, is comprised the following steps：
Step 1, high accuracy, the standard flat mirror of great surface quality are obtained using single-point ultra-precise turning method；
Step 2, the vertical distance for adjusting height adjustable connecting bracket, for the wheel of particular path on standard flat mirror surface
Profile, by the image collecting function in high speed zooming camera system by automatic data collection to a series of pictures handled, and
The comprehensive effect that sharpens of pixel in these picture high speed zooming camera system optical axis focuses is analyzed, so as to draw
The ability of most clear pixel and place picture；According to the one-to-one corresponding between the pixel and high speed zooming camera system focal length
Functional relation, obtain reality corresponding to the pixel and be detected the coordinate value of target point and high speed zoom camera system on curved surface
Relation between system focal length.
Step 3, after high speed zooming camera system has been analyzed, by closed loop straight pulse stepping slide unit carry at a high speed become
The relatively tested curved surface of burnt camera system automatically steps a unit distance along specified path direction, and process described in repeat step 2 is entered
OK, until all step pitch test points are completed on detection destination path；
Step 4, gained pixel respective coordinates point data is fitted, obtained relative to high speed zooming camera system
Baseline profile curve；
Step 5, using step 2-4 methods describeds particular path on target surface to be detected is detected, obtained relative
In the detection target profile curve of high speed zooming camera system；
Step 6, reference contour will be subtracted relative to the detection target profile curve data of high speed zooming camera system benchmark
Data, target profile curve data are obtained, and evaluated and analyzed.
The invention has the advantages that：
For the high-speed adaptive detectability of the target point data of big steepness curved surface particular depth of view, it is deflected into without optical axis
In the range of measured surface normal direction or angle permissibility, without adjusting height focal length, the human error in continuous measurement process is eliminated；
There are low cost and other advantages in terms of instrument application.
Brief description of the drawings
Fig. 1 is the flow chart of detection method of the embodiment of the present invention.
Fig. 2 is the composition figure of detecting system of the present invention.
Embodiment
In order that objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
Describe in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
As shown in Fig. 2 the embodiments of the invention provide high speed zoom camera to the self-adapting detecting system of curved surface profile line,
Including standard flat mirror 1, high speed zooming camera system 2, closed loop straight pulse stepping slide unit 3, lighting source 4, height adjustable connect
Support 5, control system 6 are connect, can realize and the high-speed adaptive of contoured line on target surface to be measured is detected, standard flat
Mirror 1 is by what the adjustable connecting bracket 5 of high speed formed between closed loop straight pulse stepping slide unit 3 and high speed zooming camera system 2
Between system, and standard flat mirror 1 contacts with closed loop straight pulse stepping slide unit 3, plays and provides examination criteria for measuring system
Effect, high speed zooming camera system 2 include various forms of lens, image capturing systems with high-speed response and zoom rate
And driving control system, on the premise of uniform, stable lighting source 4 is illuminated to test position, high speed zoom camera
System 2 can collect the related data of measured surface up-sampling point.The control system of the closed loop straight pulse stepping slide unit 3
6 with the driving control system comprehensive integration of high speed zooming camera system, and combine data processing function to objective contour to be detected
Line is driven sampling, processing and comprehensive analysis.
As shown in figure 1, the embodiment of the present invention additionally provides a kind of adaptive inspection of high speed zoom camera to curved surface profile line
Survey method, comprises the following steps：
Step 1, high accuracy, the standard flat mirror of great surface quality are obtained using single-point ultra-precise turning method；
Step 2, the vertical distance for adjusting height adjustable connecting bracket, for the wheel of particular path on standard flat mirror surface
Profile, by the image collecting function in high speed zooming camera system by automatic data collection to a series of pictures handled, and
The comprehensive effect that sharpens of pixel in these picture high speed zooming camera system optical axis focuses is analyzed, so as to draw
The ability of most clear pixel and place picture；According to the one-to-one corresponding between the pixel and high speed zooming camera system focal length
Functional relation, obtain reality corresponding to the pixel and be detected the coordinate value of target point and high speed zoom camera system on curved surface
Relation between system focal length.
Step 3, after high speed zooming camera system has been analyzed, by closed loop straight pulse stepping slide unit carry at a high speed become
The relatively tested curved surface of burnt camera system automatically steps a unit distance along specified path direction, and process described in repeat step 2 is entered
OK, until all step pitch test points are completed on detection destination path；
Step 4, gained pixel respective coordinates point data is fitted, obtained relative to high speed zooming camera system
Baseline profile curve；
Step 5, using step 2- steps 4 methods described particular path on target surface to be detected is detected, obtained
Relative to the detection target profile curve of high speed zooming camera system；
Step 6, reference contour will be subtracted relative to the detection target profile curve data of high speed zooming camera system benchmark
Data, target profile curve data are obtained, and evaluated and analyzed.
Embodiment
1) using the step 2-4 in specific detection method, gone from the X that closed loop straight pulse stepping slide unit drives to detection
In the range of journey, specific stride t obtains the baseline profile curve S1 relative to high speed zooming camera system.
2) the detection contour line relative to high speed zooming camera system is obtained using the step 2-4 in specific detection method
S2, specific stride t1 ＞ t, the specific sampled point stroke range that detects are contained in calibration curve S1 contour line stroke range.
3) examined according to detection target profile curve S2 specific sampled point X to coordinate, interpolation calculation baseline profile curve S1
Z ' values corresponding to light-metering direction of principal axis.
4) according to detection target profile curve S2 each Z-direction coordinate value of specific sampled point, the target surface wheel that need to be detected is calculated
Profile sampled point Z " values are Z-Z '.
5) each coordinate (X, Z ") for calculating point is fitted, curve obtained is the target surface contour line that need to be detected.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. high speed zoom camera is to the self-adapting detecting system of curved surface profile line, it is characterised in that including standard flat mirror, high speed
Zooming camera system, closed loop straight pulse stepping slide unit, lighting source, height adjustable connecting bracket, control system, standard flat
The system that mirror is made up of the adjustable connecting bracket of high speed between closed loop straight pulse stepping slide unit and high speed zooming camera system it
Between, and standard flat mirror contacts with closed loop straight pulse stepping slide unit, high speed zooming camera system has including various forms of
The lens of high-speed response and zoom rate, image capturing system and driving control system, the closed loop straight pulse stepping slide unit
Control system and high speed zooming camera system driving control system comprehensive integration, and combine data processing function to be detected
Target profile curve is driven sampling, processing and comprehensive analysis.
2. high speed zoom camera is to the self-adapting detecting method of curved surface profile line, it is characterised in that comprises the following steps：
Step 1, high accuracy, the standard flat mirror of great surface quality are obtained using single-point ultra-precise turning method；
Step 2, the vertical distance for adjusting height adjustable connecting bracket, for the profile of particular path on standard flat mirror surface
Line, by the image collecting function in high speed zooming camera system by automatic data collection to a series of pictures handled, and will
The comprehensive effect that sharpens of pixel is analyzed in these picture high speed zooming camera system optical axis focuses, so as to draw most
Clear pixel and its picture at place；According to the one-to-one letter between the pixel and high speed zooming camera system focal length
Number relation, obtain the reality corresponding to the pixel and be detected the coordinate value of target point and high speed zooming camera system Jiao on curved surface
Relation away between；Wherein, standard flat mirror passes through height between closed loop straight pulse stepping slide unit and high speed zooming camera system
Between the system that connecting bracket that speed is adjustable forms, and standard flat mirror contacts with closed loop straight pulse stepping slide unit；
Step 3, after high speed zooming camera system has been analyzed, high speed zoom is carried by closed loop straight pulse stepping slide unit and taken the photograph
A unit distance is automatically stepped along specified path direction as system is tested curved surface relatively, process described in repeat step 2 is carried out, directly
All step pitch test points are completed on to detection destination path；
Step 4, gained pixel respective coordinates point data is fitted, obtains the benchmark relative to high speed zooming camera system
Contour curve；
Step 5, using step 2-4 methods describeds particular path on target surface to be detected is detected, obtained relative to height
The detection target profile curve of fast zooming camera system；
Step 6, reference contour data will be subtracted relative to the detection target profile curve data of high speed zooming camera system benchmark,
Target profile curve data are obtained, and is evaluated and is analyzed.
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| CN101231158A (en) * | 2008-02-20 | 2008-07-30 | 北京理工大学 | Device for fast detecting exiguity object three-dimensional contour dimension based on liquid zoom lens |
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