CN110296718A - A kind of bar code formula levelling staff detection system and detection method - Google Patents
A kind of bar code formula levelling staff detection system and detection method Download PDFInfo
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- CN110296718A CN110296718A CN201910720597.XA CN201910720597A CN110296718A CN 110296718 A CN110296718 A CN 110296718A CN 201910720597 A CN201910720597 A CN 201910720597A CN 110296718 A CN110296718 A CN 110296718A
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- bar code
- levelling staff
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- General Physics & Mathematics (AREA)
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- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The present invention relates to a kind of Novel bar code levelling staff detection system and detection methods.System is made of three coordinate measuring machine, plane mirror, electronic level.The three coordinate measuring machine is fixed gantry, motion workbench structure；The plane mirror is fixed on coordinate measuring machine gantry, the horizontal guideline angle at 45 ° with the electronic level；The electronic level and the tested same brand of bar code levelling staff.Middle adjusting method adjustment is set described in system warp, form precision measurement system, bar code ruler movement, it reads and decodes by plane mirror at vertical standing statue and by the electronic level, obtain bar code ruler indicating value, 2-D data column are formed with standard shift value, and through segmentation superposition least square method fitting, using straight slope as every meter Zhen Chang compensation factor of tested bar code ruler.The Novel bar code levelling staff detection system implementation is easy, and space occupied is small, and measurement accuracy is high, data evaluation science.
Description
Technical field
The present invention relates to Surveying and Mapping Industry detection technique, specially a kind of bar code formula levelling staff detection system and detection side
Method.
Background technique
Bar code levelling staff, also referred to as bar code formula invar scale are to delineate bar code in a kind of tape, pass through scale bar code
Item sky change width and longitudinal arrangement carry out the leveling measuring instrument of development length information, matched with electronic level.
Electronic level is decoded one section of bar code of bar code levelling staff by certain way, obtains position and the elevation information of scale, is had
Have, speed higher than the traditional measurement mode precision of traditional level and line type levelling staff faster, reading it is automatic the features such as,
It is widely applied in first and second order leveling.Therefore, it is guarantee the measurement of the level accurate, bar code levelling staff and matches
The electronic level used is covered to be intended to periodically be examined and determine.
Currently, the equipment of detection bar code levelling staff is based on machine vision metrology technology." JJG(mapping) 2102-2013
Invar bar code levelling staff ", " CN201720134265.X bar code ruler detector " etc. disclose a kind of perpendicular attitude calibrating bar code
The device of levelling staff, principle are that levelling staff is moved along vertical long guideway, and camera aims at corresponding bar code, moves the item of generation
Yardstick is displaced to be compared with the shifting of the normal bit of laser interferometer, obtains the corresponding error of levelling staff." the bar code formula water of Ye Qing
The research of object staff image dynamic detection system " then research bar edges image recognition in, disclose a kind of horizontal appearance of bar code ruler
The experimental provision of state detection, principle is as described above.The manufacturing enterprise of current each electronic level possesses the bar code level mark of oneself
Ruler coding techniques patent, due to intellectual property, coding techniques still falls within the secrecy technology of manufacturing enterprise, using machine vision
Technology identifies bar edges position, inconsistent with actual use situation without considering barcode encoding rule.
Summary of the invention
The technical problem to be solved by the present invention is 1, existing apparatus is based on the empty width of machine vision independent detection bar code ruler item
Degree, is not related to the encoded information of bar code, one section of multiple phase of bar code levelling staff need to be read with electronic level in actual use
Adjacent bar code and the principle difference for decoding determining position；2, existing detection device needs to build a set of long guideway, horizontal attitude detection
Guide rail takes up a large area, and perpendicular attitude detection guide rail occupied space is big, and construction cost is high.
The present invention provides a kind of building methods of new bar code formula levelling staff detection system, and main body is fixed bridge-type
Three coordinate measuring machine.Three coordinate measuring machine according on its three kinematic axis high-precision grating scale and contact gauge head etc. can be realized it is several
The measurement such as what shape, length and circumference graduation, has the characteristics that versatile, measurement range is big, precision is high, excellent in efficiency, wide
It is general to be used for each department such as machinery manufacturing industry, auto industry, electronics industry, aerospace industry and national defense industry.This system uses
Fixed bridge-type three-coordinate measuring machine, its main feature is that gantry is fixed, working table movement, and is set in grating scale, the movement of workbench and
Precision is reliably controlled.
A kind of bar code formula levelling staff detection system of the present invention adopts the following technical scheme that realization: a kind of bar code
Formula levelling staff detection system is made of fixed bridge-type three coordinate measuring machine, plane mirror, electronic level three parts；
A, the fixed bridge-type three coordinate measuring machine has the structure of fixed gantry frame, working table movement, workbench and pedestal
Between supported by aerostatic bearing, workbench is horizontal, can support bar code levelling staff；
B, the plane mirror is that rectangular optical glass planar is finished to substrate, the first reflective surface, is fixed on gantry frame
On frame, with electronic level horizontal guideline angle at 45 °；
C, the electronic level is the mating level of tested bar code levelling staff, the center vertical axis and item of electronic level
The extended line of code levelling staff measuring center line is orthogonal.
The fixed bridge-type three coordinate measuring machine is the fixed gantry frame of closing, workbench level and axis of movement and electronics
Level horizontal guideline is parallel, as full-length generator and supports tested bar code ruler component；Plane mirror is used as item
Code levelling staff is the component of vertical image by horizontal transposition；The electronic level is as bar code ruler length information decoder group
Part.
Further, the measurement sighting distance of electronic level and tested bar code levelling staff is constant in measurement, is only tested bar code
Levelling staff movement.
A kind of bar code formula levelling staff detection method of the present invention, it is real using bar code formula levelling staff detection system
Now, including electronic level sets middle adjusting method and measurement method；The electronic level sets middle adjusting method, includes the following steps:
(a), it on the table by the placement of bar code levelling staff, measures to fix bridge-type three coordinate measuring machine gauge head and adjusts bar code
Levelling staff central axes are parallel with fixed bridge-type three coordinate measuring engine measurement axis；
(b), electronic level is set up in bar code levelling staff one end, adjusted to horizontality, and substantially will be in electronic level
Heart vertical axis is placed near bar code levelling staff central axes；
(c), it is observed with the sighting distance function of electronic level, aims at bar code levelling staff image both ends symmetric position, measurement respectively
The sighting distance of level and bar code rulerl 1、l 2Ifl 1≠l 2, electronic level position is adjusted, distance is read again, is adjusted repeatedly
It is whole, the during which deflection of fine-tuning plane mirror left and right under the premise of guaranteeing angle at 45 ° with electronic level horizontal guideline, directly
It arrivesl 1、l 2It moves closer to and equal, during electronic level is set at this time, center vertical axis is orthogonal with bar code ruler central axes；
Coordinate measuring machine is adjusted to level, and plane mirror is adjusted to being at an angle of 45 degrees to the horizontal plane.Electronic level is placed in item to be measured
Code levelling staff one end, more closer better away from coordinate measuring machine, center vertical axis is adjusted to bar code ruler by setting middle adjusting method and is surveyed
The extended line for measuring axis is orthogonal, and the system building is accurate bar code ruler detection system at this time, and bring uncertainty is minimum.It is described
Measurement method is as follows: starting fixed bridge-type three coordinate measuring machine, the movable workbench of bar code levelling staff will be supported to measurement model
Close/the distal end enclosed, is presented the position image low/high of bar code ruler in electronic level, and electronic level is aobvious by barcode encoding rule
Show the value, records the indicating value respectively and the coordinate measuring machine as full-length corresponds to indicating value；Then workbench as required between
Every movement, electronic level is decoded to obtain position of rule by plane mirror to scale different interval position bar code image
By low/high to high/low " height " value, the reading with fixed bridge-type three coordinate measuring machine motion workbench grating scale is generated respectively
Full-length compare, thus realize to bar code levelling staff carry out accurate measurement.
It further, further include to the processing method for measuring the data obtained: the standard to fix bridge-type three coordinate measuring machine
Length makees abscissa, and the bar code levelling staff length that electronic level is read makees ordinate, maps according to different measurement ordered series of numbers, intends
Least-squares line is closed out, straight slope is determined as the compensation factor of bar code levelling staff rice gap length average value.
Further, the data processing method further includes segmentation superposition least square method, segmentation superposition least square method
Include the following steps:
(1), it when fixed bridge-type three coordinate measuring engine measurement range is less than bar code levelling staff measurement range, is detected using segmentation
Blocking bar code levelling staff whole measurement range, latter section of starting point are the last points of leading portion；
(2), rear one piece of data, which is arranged, reads the section each point value accordingly by electronic level, and the standard that coordinate measuring machine generates is long
Angle value is superimposed composition with the algebraical sum of the last point value of the last period, finally to whole bar code ruler detection datas, full-length
2-D data column carry out linear fit using least square method, obtain compensation of the fitting a straight line slope value as the every meter Zhen Chang of the ruler
The factor.
The present invention has the advantage that 1, multipurpose compared with existing apparatus and method: the system is a kind of comprehensive inspection
Examining system expands the inspection for being used for bar code levelling staff with plane mirror in addition to the original detection applications of coordinate measuring machine itself
It surveys；2, it builds flexibly at low cost: without new configuration laser interferometer and long guideway system, only needing to survey with existing coordinate when needed
Amount machine is built, and construction cost is low；3, whole occupied area is small: being exactly the locational space of a coordinate measuring machine；4, data processing
Science: measurement model is different from the existing item sky width for only measuring bar code ruler, and ignores its unique barcode encoding patent, uses
It is decoded with brand level, best straight line matching is carried out to multistage detection data based on least square method.
Detailed description of the invention
Fig. 1, detection system composition schematic diagram of the present invention.
Fig. 2, systematic survey schematic diagram of the present invention.
1- fixes bridge-type three coordinate measuring machine, 2- plane mirror, 3- bar code levelling staff, 4- electronic level, 5- shifting
Dynamic workbench, 6- sighting distance, 7- bar code levelling staff picture, the 8- bar code levelling staff direction of motion.
Specific embodiment
There is provided following embodiments is to preferably further understand the present invention, it is not limited to the best embodiment party
Formula is not construed as limiting the contents of the present invention and protection scope, anyone under the inspiration of the present invention or by the present invention and its
The feature of his prior art is combined and any and identical or similar device or system of the present invention for obtaining, all falls within this
Within the protection scope of invention.
Specific experiment condition or step person are not specified in embodiment, according to the literature in the art described routine experiment
The condition of step or operation can carry out.Instrument or product are can be by the conventional instrument or product of commercially available acquisition.
The system used in the embodiment of the present invention is (1) fixes bridge-type three coordinate measuring machine, manufacturer: Leitz, model
PMM-C 12107, MPEE: ± (0.5+L/ 700) μm (LUnit is m)；(2) plane mirror, length >=300 mm, thickness >=
10 mm rectangular optical glass planar substrates, 3 μm of flatness < after ground polishing, the first reflecting surface plating metal reflectance coating；(3)
Electronic level, with the same brand of bar code levelling staff to be measured.
System building: the three-dimensional coordinates measurement machine worktable is adjusted to level, as full-length generator and support quilt
Survey bar code ruler component；The plane mirror is mounted on coordinate measuring machine gantry on one side, the horizontal guideline tune with electronic level
It is whole to 45° angle, as the component for by bar code levelling staff by horizontal transposition being vertical image；The electronic level horizontal guideline
Parallel with coordinate measuring machine axis of movement, adjustment center vertical axis is orthogonal with the extended line of bar code ruler measuring center line, as item
Yardstick length info decoder component.
Method of adjustment: setting middle adjusting method, by deformation minimum principle by bar code levelling staff to be measured in three coordinate measuring machine work
Make to support on platform and fix, start coordinate measuring machine, scale blade direction is measured and adjusted with Probe Heads of Coordinate Measuring Machines and coordinate is surveyed
It is parallel that amount machine measures axis；Electronic level is set up in scale one end, and substantially level center vertical axis is placed in bar code ruler
Near heart line, adjustment level to horizontality；It is observed with the sighting distance function of electronic level, aims at respectively and measure bar code ruler
(i.e. using bar code levelling staff length centerline as symmetrical centre, left and right refers to the width of bar code levelling staff to image center line or so
Spend direction) bar code that represents of symmetrical position is at a distance from levell 1、l 2Ifl 1≠l 2, electronic level position is adjusted,
It reads again distance and adjusts, during which fine-tuning plane mirror (shows that plane mirror is long in such as Fig. 2 along the deflection of long side
Side does small deflection to paper inside/outside under the premise of keeping and being in 45° angle with horizontal guideline), untill 1、l 2It moves closer to simultaneously
Equal, during electronic level is set at this time, center vertical axis and bar code ruler measure axis vertical take-off.
Detection method: starting coordinate measuring machine, will support the movable workbench of bar code ruler to measurement range it is close/distally,
The position image low/high of bar code ruler is presented in level, level shows the value by barcode encoding rule, records the indicating value respectively
Indicating value is corresponded to the coordinate measuring machine as full-length；Then the interval movement of workbench as required (is transported in Fig. 1 to right/left
It is dynamic), by electronic level by plane mirror to scale different interval position bar code image decode to obtain position of rule by
It is low/high to arrive high/low " height " value, respectively compared with the full-length that the reading of coordinate machine motion workbench grating scale generates,
Accurate measurement is carried out to bar code levelling staff to realize.
Data processing: make abscissa, the item that electronic level is read to fix the full-length of bridge-type three coordinate measuring machine
Yardstick length makees ordinate, maps according to different measurement ordered series of numbers, fits least-squares line, straight slope is determined as scale rice
The compensation factor of gap length average value.
When coordinate measuring machine measurement range is not able to satisfy bar code levelling staff effective length, it can be used and just set anti-standing statue method
It (top of scale towards level), inverts erect image method (bottom end of scale towards level) or combinations thereof and carries out segmentation survey
Amount, latter section of starting point be the most end of leading portion a bit, until detection covers the effective length of levelling staff to be measured.It is folded using segmentation
Add least square method to carry out data processing, includes the following steps:
One piece of data, which is arranged, afterwards reads each point value by this section of electronic level, the full-length value that coordinate measuring machine generates be with it is preceding
The algebraical sum of one section of the last point value is superimposed composition, is finally carried out to whole 2-D data column using least square method linear
Fitting obtains compensation factor of the fitting a straight line slope value as the every meter Zhen Chang of the ruler.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.As pacified on three-dimensional coordinates measurement machine worktable or bar code levelling staff to be measured
Laser interferometer is set, coordinate measuring machine grating scale reading etc. is replaced by the reading of laser interferometer.
Claims (6)
1. a kind of bar code formula levelling staff detection system, by fixed bridge-type three coordinate measuring machine, plane mirror, electronic level
Three parts composition；It is characterized by:
A, the fixed bridge-type three coordinate measuring machine has the structure of fixed gantry frame, working table movement, workbench and pedestal
Between supported by aerostatic bearing, workbench is horizontal, can support bar code levelling staff；
B, the plane mirror is that rectangular optical glass planar is finished to substrate, the first reflective surface, is fixed on gantry frame
On frame, with electronic level horizontal guideline angle at 45 °；
C, the electronic level is the mating level of tested bar code levelling staff, the center vertical axis and item of electronic level
The extended line of code levelling staff measuring center line is orthogonal.
2. a kind of bar code formula levelling staff detection system as described in claim 1, it is characterised in that: electronic level in measurement
It is constant with the measurement sighting distance of tested bar code levelling staff, only it is tested the movement of bar code levelling staff.
3. a kind of bar code formula levelling staff detection method is realized, feature using detection system as claimed in claim 1 or 2
It is, including electronic level sets middle adjusting method and measurement method；The electronic level sets middle adjusting method, including walks as follows
It is rapid:
(a), it on the table by the placement of bar code levelling staff, measures to fix bridge-type three coordinate measuring machine gauge head and adjusts bar code
Levelling staff central axes are parallel with fixed bridge-type three coordinate measuring engine measurement axis；
(b), electronic level is set up in bar code levelling staff one end, adjusted to horizontality, and substantially will be in electronic level
Heart vertical axis is placed near bar code levelling staff central axes；
(c), it is observed with the sighting distance function of electronic level, aims at bar code levelling staff image both ends symmetric position, measurement respectively
The sighting distance of level and bar code levelling staffl 1、l 2Ifl 1≠l 2, electronic level position is adjusted, distance is read again, is passed through
It adjusts repeatedly, during which fine-tuning plane mirror left and right under the premise of guaranteeing angle at 45 ° with electronic level horizontal guideline is inclined
Turn, untill 1、l 2It moves closer to and equal, during electronic level is set at this time, center vertical axis is orthogonal with bar code ruler central axes；
The measurement method is as follows: starting fixed bridge-type three coordinate measuring machine, will support the movable workbench of bar code levelling staff
To close/distal end of measurement range, the position image low/high of bar code ruler is presented in electronic level, electronic level is compiled by bar code
Code rule shows the value, records the indicating value respectively and the coordinate measuring machine as full-length corresponds to indicating value；Then workbench is pressed
It is required that interval movement, electronic level decodes scale different interval position bar code image by plane mirror and is marked
Ruler position by low/high to high/low " height " value, respectively with fixed bridge-type three coordinate measuring machine motion workbench grating scale
The full-length that reading generates compares, and carries out accurate measurement to bar code levelling staff to realize.
4. a kind of bar code formula levelling staff detection method as claimed in claim 3, which is characterized in that further include to measurement gained
The processing method of data: make abscissa, the bar code that electronic level is read to fix the full-length of bridge-type three coordinate measuring machine
Levelling staff length makees ordinate, maps according to different measurement ordered series of numbers, fits least-squares line, straight slope is determined as item
The compensation factor of code levelling staff rice gap length average value.
5. a kind of bar code formula levelling staff detection method as claimed in claim 4, which is characterized in that the data processing method
It further include segmentation superposition least square method, segmentation superposition least square method includes the following steps:
(1), it when fixed bridge-type three coordinate measuring engine measurement range is less than bar code levelling staff measurement range, is detected using segmentation
Blocking bar code levelling staff whole measurement range, latter section of starting point be leading portion most end a bit；
(2), rear one piece of data, which is arranged, reads the section each point value accordingly by electronic level, and the standard that coordinate measuring machine generates is long
Angle value is superimposed composition with the algebraical sum of some full-lengths of the last period most end, finally to whole bar code levelling staff detection datas,
The 2-D data column of full-length carry out linear fit using least square method, obtain fitting a straight line slope value as every meter of the ruler
Very long compensation factor.
6. a kind of bar code formula levelling staff detection method as claimed in claim 5, which is characterized in that step works as coordinate in (1)
Measuring machine measurement range be less than bar code levelling staff measurement range when, can be used and just set anti-standing statue method, invert erect image method or its
Combination carries out areal survey, latter section of starting point be the most end of leading portion a bit, until detection covers the effective of levelling staff to be measured
Length.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595510A (en) * | 2019-10-10 | 2019-12-20 | 河南省计量科学研究院 | Rotating bar code ruler for electronic i-angle and line-of-sight error verification of digital level |
| CN114943238A (en) * | 2022-07-26 | 2022-08-26 | 北京紫光青藤微系统有限公司 | Test equipment for bar code reading equipment and test method thereof |
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| CN110595510A (en) * | 2019-10-10 | 2019-12-20 | 河南省计量科学研究院 | Rotating bar code ruler for electronic i-angle and line-of-sight error verification of digital level |
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