CN110986833A - Method and device for measuring straightness of track - Google Patents
Method and device for measuring straightness of track Download PDFInfo
- Publication number
- CN110986833A CN110986833A CN201911360599.9A CN201911360599A CN110986833A CN 110986833 A CN110986833 A CN 110986833A CN 201911360599 A CN201911360599 A CN 201911360599A CN 110986833 A CN110986833 A CN 110986833A
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- Prior art keywords
- guide rail
- carrier
- straightness
- track
- laser
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a method and a device for measuring the straightness of a track, comprising the following steps: step 1: emitting laser; step 2: shooting an image; and step 3: correcting a straight line; and 4, step 4: moving the carrier and shooting images; and 5: and processing the delayed image. The invention can realize the measurement of the straightness of the track, and has the advantages of simple measurement method, high measurement precision and low cost.
Description
Technical Field
The invention relates to the field of optical detection, in particular to a method and a device for measuring the straightness of a track.
Background
The linear guide rail is also called a linear rail, a slide rail, a linear guide rail and a linear slide rail, is used in the linear reciprocating motion occasions, can bear certain torque, and can realize high-precision linear motion under the condition of high load. The linear motion guide may be classified into a sliding friction guide, a rolling friction guide, an elastic friction guide, a fluid friction guide, and the like, depending on the frictional property. The linear bearing is mainly used in the automatic machines such as machine tools, bending machines, laser welding machines and the like imported from Germany, and the linear bearing and the linear shaft are matched. The linear guide rail is mainly used on a mechanical structure with higher precision requirement, and rolling steel balls are used between a moving element and a fixed element of the linear guide rail without using an intermediate medium.
Slider-transforms the motion from a curved line to a straight line. The guide rail system enables the machine tool to obtain a rapid feeding speed, and the rapid feeding is the characteristic of a linear guide rail under the condition that the rotating speeds of the main shafts are the same. Linear guides, like planar guides, have two basic elements; one as a guide is a fixed element and the other is a moving element. Since the linear guide rail is a standard component, only the plane for installing the guide rail and the parallelism of the alignment guide rail need to be processed for a machine tool manufacturer.
At present, most of linear guide rail precision measurement adopts manual measurement or a contact sensor for measurement, when the parallelism of a guide rail roller path is measured manually, a guide rail is clamped on a clamp for measuring a flat plate, a gauge stand is aligned with a guide rail side reference surface and a guide rail mounting plane, a gauge head is aligned on the guide rail roller path surface, then the gauge stand is moved for measurement, the difference value of the maximum value and the minimum value of the measurement is the guide rail roller path parallelism error, the method needs complex clamping work, the requirement on the quality of a tester is high, and the repeatability of a measurement result is poor.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a method and an apparatus for measuring the straightness of a rail.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rail straightness measuring method comprises the following steps:
step 1: emitting laser, wherein the controller controls the laser emitter to emit laser to project on a receiving plate right in front of the guide rail;
step 2: shooting an image, wherein the controller controls the camera to open the image projected by the laser emitted by the laser emitter on the shooting receiving plate;
and step 3: correcting straight lines, transmitting the shot images into a processor for processing, and repeating the steps of the step 1 and the step 2 to correct the position of the laser emitter;
and 4, step 4: moving the carrier and shooting images, wherein the controller controls the carrier with the laser emitter to move along the guide rail and controls the camera to open to shoot the images projected by the laser when the carrier moves in a delayed manner;
and 5: and processing the delayed image, and transmitting the image shot in a delayed manner into a processor for processing to judge whether the track is a straight line.
Preferably, in the method for measuring the straightness of the rail, the processor is a PC.
Preferably, in the track straightness measuring method, the receiving plate is provided with a preset accurate position.
Preferably, in the track straightness measuring method, the laser emitter is fixed on a carrier through a stabilizer, and the carrier is a carrier which can move on the track.
Preferably, in the track straightness measuring method, the judgment in the step 5 is based on an image captured by a camera, and if a line appears, the guide rail is shifted.
Preferably, in the track straightness measuring method, the deviation of the track can be judged by the reverse direction of one line.
The utility model provides a track straightness accuracy measuring device, includes operation platform, the last guide rail that is provided with of operation platform, be provided with the carrier of removal on the guide rail, can follow the guide rail and make linear motion, operation platform is last to be provided with and to accept the board, is located orbital opposite setting, be provided with laser emitter on the carrier, the board setting is accepted to the laser orientation, operation platform is last to be provided with the camera, and accepts the relative setting of board, and with the guide rail in the middle of being located, be provided with drive arrangement on the carrier, drive arrangement links to each other with the controller, the controller still links to each other with the camera and sets up, the output of camera links to each other with the treater.
By the scheme, the invention at least has the following advantages:
the invention can realize the measurement of the straightness of the track, and has the advantages of simple measurement method, high measurement precision and low cost. Meanwhile, the adopted equipment is simple, the implementation and the installation are convenient, the operation can be carried out at any place, and the measuring environment is effectively improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1, a track straightness measuring device, including operation platform 1, operation platform 1 is last to be provided with guide rail 1, be provided with the carrier 3 that removes on guide rail 2, can follow the guide rail and make linear motion, operation platform 1 is last to be provided with and to accept board 4, be located the opposite setting of track 2, be provided with laser emitter 5 on the carrier 3, laser orientation is accepted board 4 and is set up, operation platform 1 is last to be provided with camera 6, and accept board 4 and set up relatively, and with guide rail 2 is located the centre and set up, be provided with drive arrangement on carrier 3, drive arrangement links to each other with controller 7, controller 7 still links to each other with camera 6 and sets up, the output of camera 6 links to each other with processor 8.
The processor in the invention is a PC.
A rail straightness measuring method comprises the following steps:
step 1: emitting laser, wherein the controller controls the laser emitter to emit laser to project on a receiving plate right in front of the guide rail;
step 2: shooting an image, wherein the controller controls the camera to open the image projected by the laser emitted by the laser emitter on the shooting receiving plate;
and step 3: correcting straight lines, transmitting the shot images into a processor for processing, and repeating the steps of the step 1 and the step 2 to correct the position of the laser emitter;
and 4, step 4: moving the carrier and shooting images, wherein the controller controls the carrier with the laser emitter to move along the guide rail and controls the camera to open to shoot the images projected by the laser when the carrier moves in a delayed manner;
and 5: and processing the delayed image, and transmitting the image shot in a delayed manner into a processor for processing to judge whether the track is a straight line.
The receiving plate is provided with a preset accurate position.
The laser emitter is fixedly arranged on a carrier through a stabilizer, and the carrier can move on a track.
In the present invention, the judgment in step 5 is based on an image captured by a camera, and if a line appears, the rail is deviated, wherein the deviation of the rail can be judged by the reverse direction of the line.
Example one
As shown in fig. 1, a measuring system is arranged, a receiving plate is arranged right in front of a guide rail for receiving laser emitted by a laser emitter, a carrier is arranged on the guide rail, and the laser emitter is mounted on the carrier. The other end of the guide rail is provided with a camera for shooting images on the receiving plate.
Firstly, the installation position of the laser emitter on the carrier is corrected so as to eliminate the straightness deviation of the laser emitter and the guide rail. Arrange the carrier in the initiating terminal of guide rail earlier, laser emitter installs on the carrier, the controller control laser emitter transmission laser projects on the board of accepting in the dead ahead of guide rail, control camera opens simultaneously and shoots the formation of image, the image that will shoot spreads into PC and carries out the reason, the position that the analysis was formed of image and the accurate position of presetting have the deviation, if there is the deviation then the formation of image position can deviate from the preset position, then rectify and repeat above step again until the formation of image position with preset the position matching, in order to ensure that the mounted position of laser emitter on the carrier is accurate. Secondly, the controller controls the carrier to move from a starting point to the direction of the receiving plate along the guide rail, controls the camera to be turned on for delayed shooting, simultaneously turns off the camera after the carrier moves to the tail end of the guide rail, transmits the imaged image to the PC for processing, and if the guide rail deviates, the imaged image can be provided with a line, so that whether the guide rail deviates or not can be analyzed according to the imaging result, the deviation is generated in which direction, and the deviation degree is how.
The direction and extent of the above-mentioned offset can be calculated by the PC, which is not described in any further detail, and is known to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A rail straightness measuring method is characterized by comprising the following steps:
step 1: emitting laser, wherein the controller controls the laser emitter to emit laser to project on a receiving plate right in front of the guide rail;
step 2: shooting an image, wherein the controller controls the camera to open the image projected by the laser emitted by the laser emitter on the shooting receiving plate;
and step 3: correcting straight lines, transmitting the shot images into a processor for processing, and repeating the steps of the step 1 and the step 2 to correct the position of the laser emitter;
and 4, step 4: moving the carrier and shooting images, wherein the controller controls the carrier with the laser emitter to move along the guide rail and controls the camera to open to shoot the images projected by the laser when the carrier moves in a delayed manner;
and 5: and processing the delayed image, and transmitting the image shot in a delayed manner into a processor for processing to judge whether the track is a straight line.
2. The method for measuring the straightness of a track according to claim 1, wherein: the processor is a PC.
3. The method for measuring the straightness of a track according to claim 1, wherein: the receiving plate is provided with a preset accurate position.
4. The method for measuring the straightness of a track according to claim 1, wherein: the laser emitter is fixedly arranged on a carrier through a stabilizer, and the carrier can move on a track.
5. The method for measuring the straightness of a track according to claim 1, wherein: in the step 5, the judgment basis is the image shot by the camera, and if one line appears, the guide rail is deviated.
6. The method for measuring the straightness of a track according to claim 5, wherein: the deviation of the track can be judged by the reversal of one line.
7. A track straightness accuracy measuring device which characterized in that: including operation platform, the last guide rail that is provided with of operation platform, be provided with the carrier of removal on the guide rail, can follow the guide rail and make linear motion, operation platform is last to be provided with and to accept the board, is located orbital opposite setting, be provided with laser emitter on the carrier, the board setting is accepted to the laser orientation, operation platform is last to be provided with the camera, and accepts the relative setting of board, and with the guide rail in the middle of being located, be provided with drive arrangement on the carrier, drive arrangement links to each other with the controller, the controller still links to each other with the camera and sets up, the output and the treater of camera link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360599.9A CN110986833A (en) | 2019-12-25 | 2019-12-25 | Method and device for measuring straightness of track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360599.9A CN110986833A (en) | 2019-12-25 | 2019-12-25 | Method and device for measuring straightness of track |
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| Publication Number | Publication Date |
|---|---|
| CN110986833A true CN110986833A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911360599.9A Pending CN110986833A (en) | 2019-12-25 | 2019-12-25 | Method and device for measuring straightness of track |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639678A (en) * | 2021-08-20 | 2021-11-12 | 徐海 | Linear guide rail precision detection method based on intelligent camera |
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| WO2012057592A2 (en) * | 2010-10-29 | 2012-05-03 | (주) 아인스에스엔씨 | System and method for monitoring railroad facilities using a railway vehicle |
| CN104554341A (en) * | 2014-12-06 | 2015-04-29 | 呼和浩特铁路局科研所 | System and method for detecting smoothness of track |
| CN206019602U (en) * | 2016-08-29 | 2017-03-15 | 常州法尔林精机有限公司 | Straightness of elevator guide rail automatic checkout system |
| CN106949845A (en) * | 2017-01-19 | 2017-07-14 | 南京航空航天大学 | Two-dimensional laser galvanometer scanning system and scaling method based on binocular stereo vision |
| CN110319792A (en) * | 2019-07-23 | 2019-10-11 | 四川大学 | A kind of rail linearity degree detection system and method |
-
2019
- 2019-12-25 CN CN201911360599.9A patent/CN110986833A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012057592A2 (en) * | 2010-10-29 | 2012-05-03 | (주) 아인스에스엔씨 | System and method for monitoring railroad facilities using a railway vehicle |
| CN104554341A (en) * | 2014-12-06 | 2015-04-29 | 呼和浩特铁路局科研所 | System and method for detecting smoothness of track |
| CN206019602U (en) * | 2016-08-29 | 2017-03-15 | 常州法尔林精机有限公司 | Straightness of elevator guide rail automatic checkout system |
| CN106949845A (en) * | 2017-01-19 | 2017-07-14 | 南京航空航天大学 | Two-dimensional laser galvanometer scanning system and scaling method based on binocular stereo vision |
| CN110319792A (en) * | 2019-07-23 | 2019-10-11 | 四川大学 | A kind of rail linearity degree detection system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639678A (en) * | 2021-08-20 | 2021-11-12 | 徐海 | Linear guide rail precision detection method based on intelligent camera |
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Application publication date: 20200410 |
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