CN103148784B - The full-scale detection method of a kind of large-scale blade - Google Patents

The full-scale detection method of a kind of large-scale blade Download PDF

Info

Publication number
CN103148784B
CN103148784B CN201310081294.0A CN201310081294A CN103148784B CN 103148784 B CN103148784 B CN 103148784B CN 201310081294 A CN201310081294 A CN 201310081294A CN 103148784 B CN103148784 B CN 103148784B
Authority
CN
China
Prior art keywords
blade
step
measurement
monumented point
data
Prior art date
Application number
CN201310081294.0A
Other languages
Chinese (zh)
Other versions
CN103148784A (en
Inventor
赵灿
汤春瑞
刘丹丹
何万涛
郭延艳
梁永波
Original Assignee
哈尔滨鹰瑞达科技开发有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 哈尔滨鹰瑞达科技开发有限公司 filed Critical 哈尔滨鹰瑞达科技开发有限公司
Priority to CN201310081294.0A priority Critical patent/CN103148784B/en
Publication of CN103148784A publication Critical patent/CN103148784A/en
Application granted granted Critical
Publication of CN103148784B publication Critical patent/CN103148784B/en

Links

Abstract

The full-scale detection method of a kind of large-scale blade, solve standard jig measuring accuracy low, three-dimensional coordinates measurement efficiency is low, the technical matters that cost is high, the technical scheme adopted is, the method is measured blade edge blade profile dimensional measurement and white light focusing by means of grating Surface scan, by the monumented point coordinate figure on blade rack, set up grating Surface scan master pattern and base coordinate system and white light respectively to focus on the master pattern measured and base coordinate and tie up in respective master pattern and base coordinate system and carry out check point data splitting, by the cloud data unification of two kinds in the same coordinate system, generate blade integral cloud data, realize the full-scale non-contact detection of large-scale blade.

Description

The full-scale detection method of a kind of large-scale blade

Art

The present invention relates to quick three-dimensional contactless measurement.The particularly measuring method of the large-scale precision blade such as a kind of aeromotor, gas turbine, steam turbine.

Background technology

At present, China produces the quantity of blade every year more than 2,000,000, blade profile dimensional accuracy is the highest reaches ± 0.04mm, front and rear edge (edge) radius of corner is minimum reaches 0.09mm, and the dimensional accuracy error prior art of these blades is measured by standard jig and three-coordinate measuring machine contact measurement mode.The shortcoming of the measuring method of prior art is: measure blade with standard jig, cost is very high, namely the blade of a type needs to overlap standard jig more, and measuring accuracy is low, belong to qualitative detection, measuring accuracy depends on the experience of practical operation personnel completely, and this metering system has highlighted the industry requirement that can not adapt to high speed development.Three coordinate measuring engine measurement blade, although measuring accuracy is high, measure efficiency low, cost is high, is usually used in the inspection at end of blade, particularly to large-scale precision blade, owing to being subject to the restriction of surveying work mesa dimensions, sometimes even cannot measures.The detection of all kinds of blade, no matter be standard jig mensuration, or three dimension coordinate measurement method is all measure the molded line of blade, but the fatal defects that vane type line is measured is: due to molded line limited amount, completely truly can not reflect the virtual condition of blade, therefore, often have overproof blade cannot be detected leaf quality to be difficult to ensure.

Summary of the invention

In order to overcome the above-mentioned technological deficiency that prior art measuring method exists, the present invention is based on " grating Surface scan technology+white light focusing technology ", design three-dimensional non-contact measurement method, implement the non-cpntact measurement to large-scale precision blades such as blade of aviation engine, gas turbine and steam turbines, solve the measuring accuracy and measurement efficiency that improve blade profile and edge.

The technical scheme that the present invention realizes goal of the invention employing is: the method is measured blade edge blade profile dimensional measurement and white light focusing by means of grating Surface scan, by the cloud data unification of two kinds in the same coordinate system, generate blade integral cloud data, realize the full-scale non-contact detection of large-scale blade.Detection method comprises the following steps:

(1), set up and the adjustable blade rack of measuring system optical three-dimensional scanning measuring head relative position, blade rack arranges monumented point, for the splicing of later data;

(2) the image, obtained grating Surface scan camera in optical three-dimensional scanning measuring head carries out denoising, strengthens process;

, step (2) process after image, obtain monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Monumented point coordinate is input in the software of three-dimension measuring system computing machine, three-dimension measuring system computing machine is set up grating Surface scan master pattern and the base coordinate system of blade rack pros and cons;

(4), by tested blades installation on blade rack, in optical three-dimensional scanning measuring head, grating Surface scan camera is measured together with blade blade rack, (2) the image that optical three-dimensional scanning measuring head obtains processes by step, image after process, obtains monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Computing machine by identifying that the monumented point coordinate measuring the monumented point coordinate that obtains (3) described with step aligns by the monumented point feature of blade rack, measurement data is loaded into step (3) described in master pattern in, complete single measurement;

, computing machine by step measurement result split in the base coordinate system that (3) step is set up (4), the content of split comprises the single measurement data of the tested blade that (4) multiple exercise step that computing machine stored obtains;

(6), whether the split result of computing machine determining step [5] is complete blade surface data, if complete, then optimize measurement result, measure and terminate, by data importing blade special measurement software, error is done to the critical size of blade, interpretation software is utilized to analyze measurement result, if blade surface data is imperfect, then by the three-dimensional space position of adjustment blade rack, (2) carry out in secondary measurement by step;

(7). in optical three-dimensional scanning measuring head, white light focuses on the image that camera obtains, measuring principle is focused on based on white light, three dimensional optical measuring system obtains coordinate support being arranged monumented point, monumented point coordinate is input to three-dimensional measurement software, and the white light setting up blade rack pros and cons on computers focuses on the master pattern and base coordinate system measured;

(8). the white light in optical three-dimensional scanning measuring head focuses on camera to carry out focusing on based on white light measuring to blade rack together with blade, three dimensional optical measuring system computer is by identifying that the monumented point feature of blade rack will measure the monumented point coordinate that obtains and the (7) described monumented point coordinate alignment of step, measurement data is loaded in the (7) described master pattern of step, completes single measurement;

(9). computing machine is by step measurement result split in the base coordinate system that (7) step is set up (8), and the content of split comprises the single measurement data of the tested blade that (8) multiple exercise step that computing machine stored obtains;

(10). whether computing machine determining step split result is (9) complete blade edge details area data, and interpretation is according to the threshold value being less than setting for the change of blade local curvature;

If (11). complete, then optimize measurement result, measure and terminate, by in data importing blade special measurement software, error is done to the critical size of blade, utilizes interpretation software to analyze measurement result, if imperfect, then by the three-dimensional space position of adjustment blade rack, by step (7), carry out in secondary measurement;

. by step (3) and (7) base coordinate system and step (6) and (11) two kinds of cloud data unifications of measuring in the same coordinate system, generate blade integral cloud data, utilize interpretation software to analyze to obtain testing result to measurement result.

The invention has the beneficial effects as follows, detection method speed is fast, precision is high, testing cost is low, simultaneously can to the profile of blade and edge one-time detection, checkout equipment is general, is applicable to carry out between manufacturing procedure to large-scale precision blade and finished product detects.

Describe the present invention below in conjunction with embodiment.

Embodiment

The full-scale detection method of large-scale blade, the method is measured blade edge blade profile dimensional measurement and white light focusing by means of grating Surface scan, by the cloud data unification of two kinds in the same coordinate system, generate blade integral cloud data, realize the full-scale non-contact detection of large-scale blade, detection method comprises the following steps:

(1), set up and the adjustable blade rack of measuring system optical three-dimensional scanning measuring head relative position, blade rack arranges monumented point, for the splicing of later data;

(2) the image, obtained grating Surface scan camera in optical three-dimensional scanning measuring head carries out denoising, strengthens process;

, step (2) process after image, obtain monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Monumented point coordinate is input in the software of three-dimension measuring system computing machine, three-dimension measuring system computing machine is set up grating Surface scan master pattern and the base coordinate system of blade rack pros and cons;

(4), by tested blades installation on blade rack, in optical three-dimensional scanning measuring head, grating Surface scan camera is measured together with blade blade rack, (2) the image that optical three-dimensional scanning measuring head obtains processes by step, image after process, obtains monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Computing machine by identify the monumented point feature of blade rack by measure the monumented point coordinate that obtains and step (2), (3) described monumented point coordinate aligns, measurement data is loaded into step (3) described in master pattern in, complete single measurement;

, computing machine by step measurement result split in the base coordinate system that (3) step is set up (4), the content of split comprises the single measurement data of the tested blade that (4) multiple exercise step that computing machine stored obtains;

(6), whether computing machine determining step split result is (4) complete blade surface data, if complete, then optimize measurement result, measure and terminate, by data importing blade special measurement software, error is done to the critical size of blade, interpretation software is utilized to analyze measurement result, if blade surface data is imperfect, then by the three-dimensional space position of adjustment blade rack, (2) carry out in secondary measurement by step;

(7). in optical three-dimensional scanning measuring head, white light focuses on the image that camera obtains, measuring principle is focused on based on white light, three dimensional optical measuring system obtains coordinate support being arranged monumented point, monumented point coordinate is input to three-dimensional measurement software, and the white light setting up blade rack pros and cons on computers focuses on the master pattern and base coordinate system measured;

(8). the white light in optical three-dimensional scanning measuring head focuses on camera to carry out focusing on based on white light measuring to blade rack together with blade, three dimensional optical measuring system computer is by identifying that the monumented point feature of blade rack will measure the monumented point coordinate that obtains and the (7) described monumented point coordinate alignment of step, measurement data is loaded in the (7) described master pattern of step, completes single measurement;

(9). computing machine is by step measurement result split in the base coordinate system that (7) step is set up (8), and the content of split comprises the single measurement data of the tested blade that (8) multiple exercise step that computing machine stored obtains;

(10). whether computing machine determining step split result is (9) complete blade edge details area data, and interpretation is according to the threshold value being less than setting for the change of blade local curvature;

If (11). complete, then optimize measurement result, measure and terminate, by in data importing blade special measurement software, error is done to the critical size of blade, utilizes interpretation software to analyze measurement result, if imperfect, then by the three-dimensional space position of adjustment blade rack, by step (7), carry out in secondary measurement;

. by step (3) and (7) base coordinate system and step (6) and (11) two kinds of cloud data unifications of measuring in the same coordinate system, generate blade integral cloud data, utilize interpretation software to analyze to obtain testing result to measurement result.

The present invention is based on " grating Surface scan technology+white light focusing technology ", design large-scale blade (as blade of aviation engine, gas turbine and turbine blade) full-scale detection method, the regions such as blade profile size are measured based on " grating Surface scan technology ", owing to being Surface scan, measuring speed is very fast, efficiency is much higher than three dimension coordinate measurement method, can improve 5 ~ 10 times; The blade details area such as the edge (leading edge, exhaust limit) of blade are measured based on " measurement of white light focusing technology ".

The measurement mechanism that the present invention relates to, comprising: the measuring system be made up of stepper motor, high-accuracy screw mandrel guide rail, blade rack, two-axle rotating table, slideway, optical three-dimensional scanning measuring head and metering computer.Stepper motor drives optical three-dimensional scanning measuring head vertically to move on high-accuracy screw mandrel guide rail by control system, and high-accuracy screw mandrel guide rail is fixedly connected with base platform; Blade rack comprises: frame monumented point support and blade fixture, frame monumented point support is the frame-shaped construction of an opening, framework surrounding is pasted with monumented point, blade fixture is between the both sides frame of frame monumented point support, frame monumented point support is fixedly connected with the upper surface of two-axle rotating table respectively with blade fixture, two-axle rotating table and slideway form two-axle rotating table can rotate at two direction of principal axis the syndeton can slided along slideway again, and slideway is fixedly connected with base platform.Blade fixture is pneumatic gripping device.Tested blades installation is on blade fixture, computing machine connects optical three-dimensional scanning measuring head by data transmission cable, blade to be measured is positioned on blade rack turntable, and this turntable can be moved along two direction of principal axis and slideway direction by the servo antrol unit controls of Survey Software.Optical three-dimensional scanning measuring head comprises left and right grating Surface scan camera, left and right white light focuses on camera, middle part is furnished with the high brightness microsize luminous point focused on based on white light and forms luminous point generator, this equipment manufactures based on white light focusing principle, the spot definition of lens array unit white light focus generator: 0.008-0.01mm.

The present embodiment, measures based on three dimensional optical measuring system, area-structure light projected outline art and white light focusing technology and detects blade, measure the regions such as blade profile size based on " grating Surface scan technology "; The blade details area such as the edge (comprising: leading edge, exhaust limit) of blade are measured based on " measurement of white light focusing technology "; By two kinds of cloud data unifications of measuring in the same coordinate system, generate blade integral cloud data.Optical three-dimensional scanning measuring head is to tested blade surface projection sine streak moulding surface structure light, heterodyne multiple frequency method is adopted to solve and launch phase place, take phase place as the constraint condition of images match, utilize the limit restraint relation in binocular stereo vision to obtain blade profile three dimensional point cloud, realize the area opticals such as blade profile size and measure.Luminous point is sent by optical three-dimensional scanning measuring head based on " measurement of white light focusing technology ", according to contour path, and raised by step pitches such as servo antrol unit controls leaf bracket, project the blade details area such as blade edge (leading edge, exhaust limit) successively, in measuring process, metering computer controls spot size and measuring route, generates the blade details area data such as the edge (leading edge, exhaust limit) of blade accordingly.Because blade shape complicated difficult obtains partial data with single measurement, therefore need repetitive measurement, obtain the measurement result of whole blade with the method for splicing.

Claims (1)

1. the full-scale detection method of large-scale blade, the method is measured blade edge blade profile dimensional measurement and white light focusing by means of grating Surface scan, by the cloud data unification of two kinds in the same coordinate system, generate blade integral cloud data, realize the full-scale non-contact detection of large-scale blade, detection method comprises the following steps:
(1), set up and the adjustable blade rack of measuring system optical three-dimensional scanning measuring head relative position, blade rack arranges monumented point, for the splicing of later data;
(2) the image, obtained grating Surface scan camera in optical three-dimensional scanning measuring head carries out denoising, strengthens process;
, step (2) process after image, obtain monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Monumented point coordinate is input in the software of three-dimension measuring system computing machine, three-dimension measuring system computing machine is set up grating Surface scan master pattern and the base coordinate system of blade rack pros and cons;
(4), by tested blades installation on blade rack, in optical three-dimensional scanning measuring head, grating Surface scan camera is measured together with blade blade rack, (2) the image that optical three-dimensional scanning measuring head obtains processes by step, image after process, obtains monumented point coordinate based on photogrammetry principles and bundle adjustment optimization method; Computing machine by identifying that the monumented point coordinate measuring the monumented point coordinate that obtains (3) described with step aligns by the monumented point feature of blade rack, measurement data is loaded into step (3) described in master pattern in, complete single measurement;
, computing machine by the split in the base coordinate system that (3) step is set up of the measurement result of step (4), the content of split comprises the single measurement data of the tested blade that (4) multiple exercise step that computing machine stored obtains;
(6), whether the split result of computing machine determining step (5) is complete blade surface data, if complete, then optimize measurement result, measure and terminate, by data importing blade special measurement software, error is done to the critical size of blade, interpretation software is utilized to analyze measurement result, if blade surface data is imperfect, then by the three-dimensional space position of adjustment blade rack, (2) carry out in secondary measurement by step;
(7). in optical three-dimensional scanning measuring head, white light focuses on the image that camera obtains, measuring principle is focused on based on white light, three dimensional optical measuring system obtains coordinate support being arranged monumented point, monumented point coordinate is input to three-dimensional measurement software, and the white light setting up blade rack pros and cons on computers focuses on the master pattern and base coordinate system measured;
(8). the white light in optical three-dimensional scanning measuring head focuses on camera to carry out focusing on based on white light measuring to blade rack together with blade, three dimensional optical measuring system computer is by identifying that the monumented point feature of blade rack will measure the monumented point coordinate that obtains and the (7) described monumented point coordinate alignment of step, measurement data is loaded in the (7) described master pattern of step, completes single measurement;
(9). computing machine is by step measurement result split in the base coordinate system that (7) step is set up (8), and the content of split comprises the single measurement data of the tested blade that (8) multiple exercise step that computing machine stored obtains;
(10). whether computing machine determining step split result is (9) complete blade edge details area data, and interpretation is according to the threshold value being less than setting for the change of blade local curvature;
If (11). complete, then optimize measurement result, measure and terminate, by in data importing blade special measurement software, error is done to the critical size of blade, utilizes interpretation software to analyze measurement result, if imperfect, then by the three-dimensional space position of adjustment blade rack, by step (7), carry out in secondary measurement;
. by step (3) and (7) base coordinate system and step (6) and (11) two kinds of cloud data unifications of measuring in the same coordinate system, generate blade integral cloud data, utilize interpretation software to analyze to obtain testing result to measurement result.
CN201310081294.0A 2013-03-14 2013-03-14 The full-scale detection method of a kind of large-scale blade CN103148784B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310081294.0A CN103148784B (en) 2013-03-14 2013-03-14 The full-scale detection method of a kind of large-scale blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310081294.0A CN103148784B (en) 2013-03-14 2013-03-14 The full-scale detection method of a kind of large-scale blade

Publications (2)

Publication Number Publication Date
CN103148784A CN103148784A (en) 2013-06-12
CN103148784B true CN103148784B (en) 2016-01-20

Family

ID=48546997

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310081294.0A CN103148784B (en) 2013-03-14 2013-03-14 The full-scale detection method of a kind of large-scale blade

Country Status (1)

Country Link
CN (1) CN103148784B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591923B (en) * 2013-11-28 2016-08-17 哈尔滨电气动力装备有限公司 Core main pump diffuser crop leaf measuring method
CN104019740B (en) * 2014-05-22 2017-06-06 浙江吉利控股集团有限公司 Method and system for gathering vehicle body outside surface data
CN105241397A (en) * 2015-06-29 2016-01-13 北航温州研究院 Real-time measuring splicing method and device based on structured light
CN105403183B (en) * 2015-12-23 2018-01-30 中车眉山车辆有限公司 A kind of work model gauge check method for being used to examine hitch
CN105674904B (en) * 2016-04-21 2018-09-07 哈尔滨工业大学 A kind of through-flow gap of steam turbine detection method with intelligent assembling characteristics
CN106353115A (en) * 2016-08-28 2017-01-25 上海华测导航技术股份有限公司 Method for detection of steel structures
CN106500640A (en) * 2016-10-11 2017-03-15 中国航空工业集团公司北京航空精密机械研究所 A kind of method calibrated by engine blade measurement apparatus
CN108037009A (en) * 2017-09-01 2018-05-15 武汉华威专用汽车检测有限责任公司 A kind of refrigerated vehicle carriage strength detecting method and system
CN108506170A (en) * 2018-03-08 2018-09-07 上海扩博智能技术有限公司 Fan blade detection method, system, equipment and storage medium
CN109238136A (en) * 2018-08-09 2019-01-18 广州毅远塑胶五金模具有限公司 A kind of headstock headlight measurement method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5629764A (en) * 1995-07-07 1997-05-13 Advanced Precision Technology, Inc. Prism fingerprint sensor using a holographic optical element
US6970590B2 (en) * 2002-03-28 2005-11-29 General Electric Company Side lit, 3D edge location method
CA2389484A1 (en) * 2002-06-06 2003-12-06 Pratt & Whitney Canada Inc. Optical measuremnet of vane ring throat area
CN1267766C (en) * 2003-12-26 2006-08-02 四川大学 Method for realizing high speed moving article 3D profile measurement using stroboscopic structure lighting
US7268893B2 (en) * 2004-11-12 2007-09-11 The Boeing Company Optical projection system
CN102768026B (en) * 2012-07-23 2015-07-29 黑龙江科技大学 The equipment of the full-scale quick detection of a kind of blade

Also Published As

Publication number Publication date
CN103148784A (en) 2013-06-12

Similar Documents

Publication Publication Date Title
Aguilar et al. Stereo vision for 3D measurement: accuracy analysis, calibration and industrial applications
CN101611291B (en) Method and system for measuring an object
CN102410811B (en) Method and system for measuring parameters of bent pipe
CN102322825B (en) Optical measuring system and method for coaxiality of extra-long-hole part
US6985238B2 (en) Non-contact measurement system for large airfoils
Sładek et al. The hybrid contact–optical coordinate measuring system
US6990215B1 (en) Photogrammetric measurement system and method
CN103586740B (en) A kind of fine precision process tool work pattern is at position detecting method
US20050067568A1 (en) Method and apparatus for internal feature reconstruction
KR20080075506A (en) System for projecting flaws and inspection locations and associated method
EP3249350A1 (en) Laser measurement system and method capable of detecting 21 geometric errors
Germani et al. CAD-based environment to bridge the gap between product design and tolerance control
CN102141381B (en) The thickness of a kind of image-type cable insulation and sheath and physical dimension automatic measuring instrument
CN105423917B (en) The scaling method of Position-Sensitive Detector position error
CN103175486B (en) A kind of stitching interferometer measurement mechanism of deviation from cylindrical form and method
CN102135417B (en) Full-automatic three-dimension characteristic extracting method
WO2012057283A1 (en) Shape measuring device, shape measuring method, structure manufacturing method, and program
CN103453849B (en) The complex curved surface parts method for three-dimensional measurement that many optical sensors are collaborative and system
US20140022357A1 (en) Three-dimensional image measuring apparatus
CN102012217A (en) Method for measuring three-dimensional geometrical outline of large-size appearance object based on binocular vision
JPH06300522A (en) Method and device for calibrating measured value and optically machined part
CN107741198B (en) A method of it is demarcated based on four axis optical scanning system turntables
CN204575030U (en) Three-dimensional laser automatically scanning measuring system
CN204313798U (en) A kind of laser beam in-situ calibration device
CN104913737A (en) Component quality checking device based on line laser three-dimensional measurement and detection method of device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160120

Termination date: 20170314