CN102288115A - Method for precisely measuring roller geometric dimension on line - Google Patents
Method for precisely measuring roller geometric dimension on line Download PDFInfo
- Publication number
- CN102288115A CN102288115A CN 201110192649 CN201110192649A CN102288115A CN 102288115 A CN102288115 A CN 102288115A CN 201110192649 CN201110192649 CN 201110192649 CN 201110192649 A CN201110192649 A CN 201110192649A CN 102288115 A CN102288115 A CN 102288115A
- Authority
- CN
- China
- Prior art keywords
- roller
- cloud data
- point cloud
- radius
- geometric dimension
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000007689 inspection Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000017105 transposition Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract 1
- 230000026676 system process Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- UCFGDBYHRUNTLO-QHCPKHFHSA-N topotecan Chemical compound C1=C(O)C(CN(C)C)=C2C=C(CN3C4=CC5=C(C3=O)COC(=O)[C@]5(O)CC)C4=NC2=C1 UCFGDBYHRUNTLO-QHCPKHFHSA-N 0.000 description 1
- 229960000303 topotecan Drugs 0.000 description 1
Images
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a method for precisely measuring roller geometric dimension on line to solve the problems of low efficiency and slightly low precision of the conventional method for measuring the roller geometric dimension. The method for precisely measuring the roller geometric dimension on line is high in measurement precision and is suitable for industrial high-speed online detection. Two three-dimensional laser scanners which are arranged opposite to each other are used for acquiring point cloud data of rollers to be measured; and a computer data processing system processes the point cloud data so as to judge whether the geometric dimension of the rollers is qualified or not according to acquired geometric parameters of the rollers and error requirements.
Description
The technical field is as follows:
the invention belongs to the technical field of measuring technical devices, and relates to a high-speed online measuring method for the geometric dimension of a roller.
Background art:
the bearing is a very important mechanical part with wide application in the mechanical industry, and has large production batch and high precision requirement. At present, most bearing manufacturers in China still rely on mechanical and optical measuring instruments in the aspect of detecting the dimensional accuracy of a bearing roller, the means is backward, and the random sampling detection method relying on manpower has low detection efficiency and low accuracy and is easy to cause human errors; with the development of modern manufacturing industry, the traditional detection technology can not meet the requirement. The method aims to meet the characteristics of large production batch, strict quality requirement and heavy detection task in the bearing manufacturing industry, and the requirements of automatic assembly line operation and realization of a product zero rejection rate detection target.
The geometric parameters of the roller are important basis for judging whether the geometric dimension of the roller is qualified, and mainly comprise the following steps: radius at a section of the roller at a certain height, radius error corresponding to a certain point on the circumference of the section. At present, the detection of the geometric dimension of the roller is still basically in a manual or contact detection mode at home, and a micrometer or a differential transformer type sensor is mostly adopted for contact measurement. The traditional manual measurement method has strong dependence on operators, high labor intensity of workers and low efficiency, and more importantly, the product precision cannot be effectively guaranteed, and a lot of artificial errors can be generated, so that the detection requirements of large-batch, fast-paced and high-precision products are difficult to meet. As the processing equipment of the roller in China is generally low in precision and poor in consistency, the precision of the roller is mostly divided by detection equipment, and the quality and the yield of the bearing product in China are severely restricted. The research on the non-contact high-precision high-speed detection of the outer diameter of the bearing roller is still in the blank stage.
The processing and detecting mode of the foreign bearing roller is different from that of the bearing factory in China. The machining precision of a forging bed for machining the rolling body abroad and a cylindrical grinding machine is generally higher than that of China, so that the machined roller can better ensure the precision and consistency. But the price is very expensive and can not be accepted by most domestic mechanical manufacturing enterprises. The precision of the roller can be regularly monitored, the product quality can be well controlled by adopting a sampling inspection mode, and the sampling inspection test equipment also adopts a contact type measurement mode. Large-scale application and real-time online detection on a production field cannot be realized, and the backward state of the detection means cannot be changed essentially.
The invention content is as follows:
the invention aims to solve the problems of low efficiency and low precision of the conventional roller geometric dimension measuring method, provides a high-speed online detection method for the geometric dimension of a roller, has high measuring precision, and is suitable for industrial high-speed online detection.
The purpose of the invention is realized by the following measures:
1) selecting two high-precision three-dimensional laser scanners;
2) the two three-dimensional laser scanners are oppositely arranged;
3) setting a target:
4) the three-dimensional laser scanner scans the roller on the scanning platform to obtain point cloud data of the roller under any coordinate system, wherein the form of the point cloud data is (
）
5) Matching the point cloud data of the two scanners according to the set target;
6) according to the detection condition, extracting point cloud data of the bottom of the roller, wherein the coordinate of the point cloud data is (
）
，（) On the same circle, the equation is:
The specific solving method comprises the following steps:
the following equation:
wherein,
，
；
the designed value of the radius of the circle;
wherein:
wherein
Representation matrix
The transpose operation of (1).
Solving the equation to obtain
Optimum value of (2)
；
At this time, the process of the present invention,the error between the actual radius value and the designed radius value of the roller is obtained;
7) according to
The following can be obtained:
wherein:
indicates a point on a certain height plane (corresponding to point:)
) Radius error of (2 [ ], ] [, ]]Indicating a summation.
According to
，
，
And judging whether the bottom size of the roller is qualified or not according to the error requirement.
8) For any height surfaceThe detection of the geometric dimension of the roller can extract the point cloud data of the roller on the height surface
Judging the height surface of the roller according to the error requirement
And if the geometric dimension is qualified, the specific algorithm is the same as that in step 6.
Compared with the prior art, the invention has the following advantages:
1. high speed on-line detection
The existing detection method mainly adopts a sampling detection mode, has low efficiency and can not meet the requirement of piece detection.
According to the detection method, each product is detected for only 10s, 6 products can be detected in one minute, 360 products can be detected in one hour, uninterrupted detection can be realized in 24 hours in one day, and 8640 products can be detected in one day. Therefore, the detection efficiency is high.
2. The precision of the invention can reach 0.02mm at most. Which is generally not achieved with the prior art.
Description of the drawings:
FIG. 1 is a schematic view of a data acquisition portion of the apparatus of the present invention.
Fig. 2 is a schematic diagram of the established rectangular coordinate system.
In the figure: 1 is three-dimensional laser scanner, 2 is three-dimensional laser scanner, 3 is the roller that detects, 4-is the mark target, and 5 is the mark target.
The specific implementation mode is as follows:
the method can realize the online detection of the bearing roller production line.
As shown in fig. 1 and 2, the online detection of the cylindrical roller is realized. The invention can also realize the measurement of the tapered roller.
Three-dimensional laser scanners useful in the present invention can employ: foreign brands such as come card, topotecan and Tianbao, national brands such as Shenzhen Shanhua luck technology Limited, and scanners produced by Beijing Bo Wei Hengxin technology development Limited can be used. The specific model is determined according to the detection precision requirement.
In FIG. 1, a precision inspection system for measuring roller geometry may include a scanning system and a computer data processing system; the scanning system consists of a scanning platform and two oppositely arranged three-dimensional laser scanners and is used for acquiring point cloud data of the roller to be detected; the computer data processing system consists of a data acquisition module and a data processing module and is used for processing point cloud data and judging whether the geometric dimension of the roller is qualified or not.
The detection steps of the invention are briefly described as follows:
step 1: the roller 3 to be detected is transmitted into the scanning platform;
step 2: setting a target 4 and a target 5;
step 4, the point cloud data of the roller 3 to be detected, which is obtained by the scanning system, is transmitted into a computer data processing system;
and 5, processing the point cloud data by a data processing module of the computer data processing system (specificallyProcessed according to the previous 6), a certain height surface of the roller to be detected is obtained
And comparing the relevant geometric parameters with the design values of the geometric parameters on the height surface of the roller to be detected, and judging whether the geometric dimension of the roller is qualified according to the error requirement.
Claims (3)
1. A precise online detection method for geometric dimension of a roller comprises the following steps:
1) selecting two high-precision three-dimensional laser scanners;
2) the two three-dimensional laser scanners are oppositely arranged;
3) setting a target:
4) the three-dimensional laser scanner scans the roller on the scanning platform to obtain point cloud data of the roller under any coordinate system, wherein the form of the point cloud data is ( 
）
5) Matching the point cloud data of the two scanners according to the set target;
6) according to the detection condition, extracting point cloud data of the bottom of the roller, wherein the coordinate of the point cloud data is (
）
，（
) On the same circle, the equation is:
The specific solving method comprises the following steps:
the following equation:
wherein,
，；
is a point (
) The initial value of the central angle of the position is defined as positive clockwise from the X-axis direction,
；
wherein:
wherein
Representation matrixThe transposition operation of (1);
solving the equation to obtainOptimum value of (2)
；
At this time, the process of the present invention,
the error between the actual radius value and the designed radius value of the roller is obtained.
2. A method for precision on-line inspection of roller geometry according to claim 1, further comprising the steps of:
according to
The following can be obtained:
wherein:
indicates a point on a certain height plane (corresponding to point:)
) Radius error of (2 [ ], ] [, ]]Represents a summation;
according to
，
，And judging whether the bottom size of the roller is qualified or not according to the error requirement.
3. A method for precision on-line inspection of roller geometry according to claim 1, further comprising the steps of:
for any height surface
Detecting the geometric size of the roller, and extracting the height surfacePoint cloud data of upper roller (b)
）
Judging the height surface of the roller according to the error requirement
And if the geometric dimension is qualified, the specific algorithm is the same as that in step 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110192649 CN102288115B (en) | 2011-07-11 | 2011-07-11 | Method for precisely measuring roller geometric dimension on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110192649 CN102288115B (en) | 2011-07-11 | 2011-07-11 | Method for precisely measuring roller geometric dimension on line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102288115A true CN102288115A (en) | 2011-12-21 |
| CN102288115B CN102288115B (en) | 2013-04-17 |
Family
ID=45334743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110192649 Expired - Fee Related CN102288115B (en) | 2011-07-11 | 2011-07-11 | Method for precisely measuring roller geometric dimension on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102288115B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886593A (en) * | 2014-03-07 | 2014-06-25 | 华侨大学 | Method for detecting hook face circular hole based on three-dimensional point cloud |
| CN108458659A (en) * | 2018-05-03 | 2018-08-28 | 华中科技大学无锡研究院 | A kind of blade contactless detection device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4510866A (en) * | 1981-12-17 | 1985-04-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for measuring the area of image portion of image-bearing member |
| WO1992022784A1 (en) * | 1991-06-13 | 1992-12-23 | Prüftechnik Dieter Busch AG | Process and device for determining the centre-line of a cuvrature |
| CN1566900A (en) * | 2003-06-11 | 2005-01-19 | 北京航空航天大学 | Vision measuring method for spaced round geometrical parameters |
| CN101261115A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Spatial circular geometric parameter binocular stereo vision measurement method |
| CN101799275A (en) * | 2010-03-23 | 2010-08-11 | 上海理工大学 | Ultra-precision online measuring method of diameter of bearing ball |
-
2011
- 2011-07-11 CN CN 201110192649 patent/CN102288115B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4510866A (en) * | 1981-12-17 | 1985-04-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for measuring the area of image portion of image-bearing member |
| WO1992022784A1 (en) * | 1991-06-13 | 1992-12-23 | Prüftechnik Dieter Busch AG | Process and device for determining the centre-line of a cuvrature |
| CN1566900A (en) * | 2003-06-11 | 2005-01-19 | 北京航空航天大学 | Vision measuring method for spaced round geometrical parameters |
| CN101261115A (en) * | 2008-04-24 | 2008-09-10 | 吉林大学 | Spatial circular geometric parameter binocular stereo vision measurement method |
| CN101799275A (en) * | 2010-03-23 | 2010-08-11 | 上海理工大学 | Ultra-precision online measuring method of diameter of bearing ball |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103886593A (en) * | 2014-03-07 | 2014-06-25 | 华侨大学 | Method for detecting hook face circular hole based on three-dimensional point cloud |
| CN103886593B (en) * | 2014-03-07 | 2016-08-17 | 华侨大学 | A kind of based on three-dimensional point cloud curved surface circular hole detection method |
| CN108458659A (en) * | 2018-05-03 | 2018-08-28 | 华中科技大学无锡研究院 | A kind of blade contactless detection device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102288115B (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101733680B (en) | Non-contact type on-line measurement device and method of large-size bearing roller way | |
| CN102252617A (en) | Morphology registration analysis-based method for detecting precision of precise main shaft rotation | |
| CN102259278A (en) | Method for detecting geometric form and position tolerance of parts on line | |
| CN103759672A (en) | Vision measurement method for ice cream stick plane contour dimensions | |
| CN203704821U (en) | A hole series position accuracy rapid detection apparatus | |
| CN109253710B (en) | Calibration method for zero error of A axis of REVO measuring head | |
| CN102288115A (en) | Method for precisely measuring roller geometric dimension on line | |
| CN113446952B (en) | Online non-contact shaft diameter measuring method | |
| CN102620631A (en) | Detection method for included angle deviation of raceway of cylindrical roller bearing inner ring and reference end surface | |
| CN204831058U (en) | On -line measuring bent axle circle is beated examines utensil | |
| CN205014943U (en) | Axle type spare part circle measuring device | |
| WO2022021967A1 (en) | Method for high-precision measurement of degree of bending and degree of twisting of connecting rod | |
| CN203323674U (en) | Center distance detecting tool used for non-through hole | |
| CN106092008A (en) | The coordinate unification calibration device of high-accuracy composite type measuring machine and scaling method | |
| CN102642155B (en) | Small part rotation center-adjusting method based on image auxiliary | |
| CN103292764A (en) | Aid, equipment and method for detecting bearing outer ring height | |
| CN202141431U (en) | Precision detecting system for geometric dimension of roller | |
| CN102962729B (en) | Method for realizing on-line measurement of multi-purpose measuring head for vertical numerically controlled lathe | |
| CN203704845U (en) | Universal joint outer star wheel fairway 120 degree indexing difference measuring tool | |
| Li et al. | Non-contact dimension measurement of mechanical parts based on image processing | |
| CN106767627A (en) | A kind of micro-displacement touch sensor device | |
| CN203572375U (en) | Hole position degree detection device | |
| CN103353360B (en) | Method for measuring residual stress of welded rotor | |
| CN201969965U (en) | Line-contact straight bevel gear positioning body | |
| CN105479338A (en) | Automatic on-line detection method for dual measurement of numerical control grinder |
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 | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161027 Address after: 210017 Jiangsu Province, Jianye District Jiangdong Road, No. 359 (building, building on the 1st floor, B District) Patentee after: NANJING KEBO SPATIAL INFORMATION TECHNOLOGY CO., LTD. Address before: 210044 Nanjing City, Pukou Province, Nanjing Road, No. 219, No. six, No. Patentee before: Nanjing University of Information Science and Technology |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20170407 Address after: 210017 Suzhou, Jiangsu, Taicang Town, the people of the South Road, No. 162 Patentee after: Suzhou south letter Mapping Technology Co., Ltd. Address before: 210017 Jiangsu Province, Jianye District Jiangdong Road, No. 359 (building, building on the 1st floor, B District) Patentee before: NANJING KEBO SPATIAL INFORMATION TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 162 Renmin South Road, Chengxiang Town, Suzhou City, Jiangsu, Taicang Patentee after: Suzhou Xiao Qi Mdt InfoTech Ltd Address before: No. 162 Renmin South Road, Chengxiang Town, Suzhou City, Jiangsu, Taicang Patentee before: Suzhou south letter Mapping Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20170711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |