CN106152955B - A kind of large-size axis parts detection means and method - Google Patents
A kind of large-size axis parts detection means and method Download PDFInfo
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- CN106152955B CN106152955B CN201610863780.1A CN201610863780A CN106152955B CN 106152955 B CN106152955 B CN 106152955B CN 201610863780 A CN201610863780 A CN 201610863780A CN 106152955 B CN106152955 B CN 106152955B
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title description 14
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000004323 axial length Effects 0.000 claims abstract description 16
- 239000012634 fragment Substances 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims description 13
- 230000007547 defect Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 102220094044 rs876659948 Human genes 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 7
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Classifications
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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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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Abstract
The present invention discloses a kind of large-size axis parts detection means, including：Measured axis supporting mechanism, the measured axis supporting mechanism include support platform, revolving dial, free slide rail, tailstock and guide rail, the revolving dial are stirred top provided with first, the tailstock stirred provided with second it is top, described first stir it is top with described second stir it is top be used for fix measured axis；Light through mode sensor group, the smooth through mode sensor group include mounting bracket upper sensor and lower sensor, and the mounting bracket bottom passes through sliding block and the guide rail mobile link；Grating scale, the grating scale are fixed in the support platform with the guide rail parallel, and the grating scale gauge outfit is on the sliding block.The present invention can correct the rigging error of sensor, can measure each fragment position diameter of axle of measured axis and axial length data and mark each point against regulation on measured axis, realize the purpose that measurement is accurate and measurement range is wide.
Description
Technical field
The present invention relates to axial workpiece detection technique field, more particularly to a kind of large-size axis parts detection means and
Method.
Background technology
At present, with the continuous improvement of machining accuracy and efficiency, requirement to measurement apparatus also more and more higher.Survey
The measurement accuracy and measurement efficiency for measuring device drastically influence whole industrial expansion.It is existing to be entered using light through mode sensor
The method of row diameter measurement typically only uses a set of sensor and only measures a position, and measurement range is small, and to sensor
Rigging error can not be corrected, while can not also measure diameter of axle axial length equidimension, also cannot accurately judge that the axial workpiece is
It is no to meet design requirement, cause the later stage to assemble.
The content of the invention
It is an object of the invention to provide a kind of large-size axis parts detection means and method, the present invention can correct sensing
The rigging error of device, each fragment position diameter of axle of measured axis and axial length data can be measured and marked each against regulation on measured axis
Point, realize the purpose that measurement is accurate and measurement range is wide.
To achieve the above object, the invention provides a kind of large-size axis parts detection means, including：
Measured axis supporting mechanism, the measured axis supporting mechanism include support platform, on described support platform one end
The revolving dial on surface, the free slide rail located at the support platform upper surface, located at the free slide rail and along the freedom
The tailstock of slide rail movement, and the guide rail located at the support platform upper surface, the revolving dial stirred provided with first it is top,
The tailstock stirred provided with second it is top, described first stir it is top with described second stir it is top be used for fix measured axis；
Light through mode sensor group, the smooth through mode sensor group includes mounting bracket, located at the top on mounting bracket top
Sensor and the lower sensor located at the mounting bracket bottom, the mounting bracket bottom are moved by sliding block and the guide rail
Connection；
Grating scale, the grating scale are fixed in the support platform with the guide rail parallel, and the grating scale gauge outfit is set
In on the sliding block.
Optionally, the mounting bracket is gate, and the upper sensor includes top emitter and top receiver, described
Top emitter and top receiver are respectively arranged on vertex in the gate two of the mounting bracket, under the lower sensor includes
Portion's transmitter and top emitter, the lower transmission device and lower receiver are respectively arranged on the bottom of the frame of gate two,
The upper transmitter and the lower transmitter are located at the same side.
Optionally, the upper sensor and the lower sensor are picking sensor.
Optionally, the guide rail includes track and leading screw arranged in parallel, and the track both ends are respectively equipped with first
Limit switch and the second limit switch, described leading screw one end are connected with the first motor, the sliding block located at the leading screw with it is described
Between track.
Optionally, the revolving dial is connected with the second motor.
Present invention also offers a kind of method detected using above-mentioned large-size axis parts detection means, bag
Include：
The manufacturing tolerance Pe of measured axis is set, the design diameter of axle Di and design axial length Li, wherein i of each section of measured axis represent institute
State the hop count of measured axis；
Obtain calibrating parameters A；
The first motor is controlled to rotate；
Obtain the position coordinates P3, structure position coordinates array P3 [n] of the gauge outfit detection of grating scale；
Obtain simultaneously the detection of light through mode sensor group upper light curtain length P1 corresponding with the position coordinates P3 and under
Light curtain length P2, builds upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, and wherein n is of element
Number；
According to calibrating parameters A, the top array P12 [n], the top array P12 of the calculating upper light curtain length number group
Each element P12=A-P1 in [n]；
Finite difference is carried out to the top array P12 [n] and the lower light curtain length array P2 [n] respectively, respectively
Obtain top difference array P ' 1 [n] and bottom difference array P ' 2 [n]；
Obtain respectively in the top difference array P ' 1 [n] and the bottom difference array P ' 2 [n] and be more than manufacturing tolerance
Pe element P ' 1jAnd P ' 2j, and with the element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jOn representing described
J-th of numerical value in portion difference array P ' 1 [n], P ' 2jRepresent j-th of numerical value in the bottom difference array P ' 2 [n]；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is more than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether
More than 1mm, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；
Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is less than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether
Less than 1mm, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, defect point is recorded；
The top array P12 [n] and the lower light curtain length array P2 [n] are divided respectively according to the waypoint
Section, obtain multistage position coordinates subnumber group, and top subnumber group corresponding with each fragment position coordinate subnumber group and lower light curtain
Length subnumber group；
To the top subnumber group corresponding to each section of position coordinates subnumber group and the lower light curtain length subnumber group
Make fitting a straight line respectively, obtain top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；
Calculate the distance between the top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 d；Calculate
The top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 average length l；
Whether the design diameter of axle Di of judging distance d shaft parts corresponding with measured axis difference is less than diameter of axle error threshold,
If it is determine that the diameter of axle of the shaft part of measured axis is qualified, it is otherwise unqualified；Judge average length l and respective shaft on measured axis
Whether the design axial length Li of section difference is less than axial length error threshold, if it is determines that the axial length of the shaft part of measured axis is closed
Lattice, it is otherwise unqualified.
Optionally, the acquisition calibrating parameters A, is specifically included：
Obtain the position coordinates P*3, structure position coordinates array P*3 [n] of the standard axle of the gauge outfit detection of grating scale；
The upper light curtain length corresponding with the position coordinates P*3 of the standard axle of light through mode sensor group detection is obtained simultaneously
Spend P*1 and lower light curtain length P*2；
Fitting a straight line is carried out to the upper light curtain length P*1 and the lower light curtain length P*2 respectively, obtained and the glazing
Straight line J corresponding to curtain length P11x+K1y+L1Straight line J corresponding to=the 0 and lower light curtain length P22x+K2y+L2=0；
According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A：
Wherein x be Points on Straight Line abscissa value, y be Points on Straight Line ordinate value, J1、K1、L1Respectively upper light curtain measurement is straight
The straight line parameter of line, J2, K2, L2 be respectively lower light curtain measurement straight line straight line parameter, R is the diameter of axle of standard axle, J=(J1+
J2)/2, K=(K1-K2)/2。
Optionally, the position coordinates array P3 [n], upper light curtain length number group P1 [n], lower light curtain length array P2 [n]
It is length identical one digit number group with top array P12 [n].
According to specific embodiment provided by the invention, the invention discloses following technique effect：Big chi provided by the invention
Very little axial part measurer is detected by setting light through mode sensor group to realize to the enclosed of measured axis, is being detected
When, upper sensor and lower sensor are moved linearly along guide rail, and the detection signal of measured axis will be recorded in real time,
Simultaneously also by the position of grating scale recording light through mode sensor group.And light through mode is passed using the detection method of the present invention
The data of sensor group detection and the data of grating scale detection carry out Treatment Analysis and obtain testing result.In the number of the detection method
Handled according to the data for using finite difference to detect light through mode sensor group in processing procedure, measured axis can be obtained
Waypoint and defect point.The data of line fitting method processing light through mode sensor group detection are reused, light through mode is passed
The measured axis lower edges point that sensor group measurement obtains carries out fitting a straight line, and then calculates the distance between two fitting a straight lines,
Directly the parameter detected to top and the bottom sensor is subtracted each other so as to avoid, or only detected caused by the distance of fixed point-to-point transmission
Measured value and calculated value be unilateral, the problem of degree of accuracy is low, and then eliminate top and the bottom sensor mounting location with guide rail rail not
Vertical and caused alignment error, improves measurement accuracy.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the stereogram of large-size axis parts detection means provided by the invention；
Fig. 2 is the front view of large-size axis parts detection means provided by the invention；
Fig. 3 is that the measuring state of the light through mode sensor group of large-size axis parts detection means provided by the invention shows
It is intended to；
Fig. 4 is the oscillogram of position coordinates P3 in the present invention；
The oscillogram that Fig. 5 is upper light curtain length P1 corresponding to position coordinates P3 in Fig. 4 in the present invention；
The oscillogram that Fig. 6 is lower light curtain length P2 corresponding to position coordinates P3 in Fig. 4 in the present invention；
Fig. 7 is the flow chart of large-size axis parts detection method provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
What it is firstly the need of explanation is：Large-size axis parts detection means provided by the invention goes for a variety of axle classes
The detection of part, including large-sized axial workpiece and the axial workpiece of small size, and include the multistage difference diameter of axle, axle
Long axial workpiece etc..
As Figure 1-3, Fig. 1 is the stereogram of large-size axis parts detection means provided by the invention；Fig. 2 is this hair
The front view of the large-size axis parts detection means of bright offer；Fig. 3 is large-size axis parts provided by the invention detection dress
The measuring state schematic diagram for the light through mode sensor group put.The large-size axis parts detection means of the present invention, including：
Measured axis supporting mechanism 1, the measured axis supporting mechanism 1 includes support platform 11, located at the support platform 11
The revolving dial 12 of one end upper surface, the free slide rail 13 located at the upper surface of support platform 11, located at the free slide rail
13 and the tailstock 14 that is moved along the free slide rail 13, and the guide rail 15 located at the upper surface of support platform 11, described time
Turn platform 12 and stir top 121 provided with first, the tailstock 14 stirs top 141 provided with second, and described first stirs top 121
Top 141 are stirred with described second to be used to fix measured axis 4；Optionally, some iron gasket for machine tool are additionally provided with support platform 11
16, to ensure the gentle support of support platform.
Light through mode sensor group 2, the smooth through mode sensor group 2 includes mounting bracket 21, located at the top of mounting bracket 21
Upper sensor 22 and the lower sensor 23 located at the bottom of mounting bracket 21, the bottom of mounting bracket 21 pass through sliding block
151 with the mobile link of guide rail 15；
Grating scale 3, the grating scale 3 is parallel with the guide rail 15 to be fixed in the support platform 11, the grating scale
Gauge outfit (not shown in figure 1) is located on the sliding block 151.
In the present embodiment, tailstock is mobile on free slide rail in measured axis supporting mechanism, make revolving dial with
The distance between tailstock is adjustable, realizes the detection of the axial workpiece of different axial lengths.Because revolving dial can rotate, because
This can also be measured axis rotation, so as to realize the inspection that measured axis axial plane defect is realized on the measured axis supporting mechanism
Survey.This detection means employs light through mode sensor group and axial workpiece is detected, and is detected by the form of light curtain tested
Whether the diameter of axle of axle and surface, the diameter of axle and the surface that can more accurately detect axial workpiece are defective.This detection means is also
There is provided grating scale, by the shift position of grating scale detection light through mode sensor group, so as to according to the position coordinates
The data of corresponding smooth through mode sensor group detection are determined, can accurately more know waypoint and defect point.
As an alternative embodiment, the mounting bracket 21 is gate, the upper sensor 22 is sent out including top
Emitter 221 and top receiver 222, the top emitter 221 and top receiver 222 are respectively arranged on the mounting bracket 21
Vertex in gate two, the lower sensor 23 include lower transmission device 231 and lower receiver 232, the lower transmission
Device 231 and lower receiver 232 are respectively arranged on the bottom of the frame of gate two of the mounting bracket 21, the upper He of transmitter 221
The lower transmitter 231 is located at the same side, and top receiver 222 and lower receiver 232 are located at the same side.The top sensing
Device 22 and the lower sensor 23 are picking sensor.
The present embodiment middle and upper part transmitter, top receiver, lower transmission device and lower receiver surround measured axis, lead to
Cross top emitter and lower transmission device launches top light curtain and bottom light curtain respectively, a portion light curtain is blocked by measured axis
It can not be irradiated on top receiver and lower receiver, so as to the light received by detecting top receiver and lower receiver
The length value of curtain obtains the diameter of axle of measured axis, and the waypoint and defect point of measured axis.
As an alternative embodiment, the guide rail 15 includes track 152 and leading screw 153 arranged in parallel,
The both ends of track 152 are respectively equipped with the first limit switch 154 and the second limit switch 155, and described one end of leading screw 153 is connected with
First motor 156, the sliding block 151 are located between the leading screw 153 and the track 152.Leading screw is driven by the first motor
Rotate so as to realize that leading screw band movable slider smoothly moves linearly in orbit, define the motion track of sliding block, and can
The translational speed of good control slide block, also it is ensured that the stationarity of light through mode sensor group movement, reduces light curtain
Fluctuation so that the light curtain length measured is more accurate.In the above-described embodiment, revolving dial 12 is connected with the second motor 122, leads to
Cross the second motor control revolving dial rotation whether and velocity of rotation, and the first motor and the second motor all for servo electricity
Machine, its servomotor controller are WNMPC08-300BB stepping closed loop controllers.
Present invention also offers a kind of method detected using above-mentioned large-size axis parts detection means, bag
Include：
Step 701：The manufacturing tolerance Pe of measured axis, the design diameter of axle Di and design axial length Li of each section of measured axis are set, its
Middle i represents the hop count of the measured axis；
Step 702：Obtain calibrating parameters A；
Step 703：The first motor is controlled to rotate；
Step 704：Obtain the position coordinates P3, structure position coordinates array P3 [n] of the gauge outfit detection of grating scale；
Step 705：The upper light curtain length corresponding with the position coordinates P3 of light through mode sensor group detection is obtained simultaneously
P1 and lower light curtain length P2 is spent, builds upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, wherein n is member
The number of element；
Step 706：According to calibrating parameters A, the top array P12 [n] of the calculating upper light curtain length number group, the top
Each element P12=A-P1 in array P12 [n]；
Step 707：Finite difference is carried out to the top array P12 [n] and the lower light curtain length array P2 [n] respectively
Point, respectively obtain top difference array P ' 1 [n] and bottom difference array P ' 2 [n]；
Step 708：Obtain and be more than in the top difference array P ' 1 [n] and the bottom difference array P ' 2 [n] respectively
Manufacturing tolerance Pe element P ' 1jAnd P ' 2j, and with the element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jTable
Show j-th of numerical value in the top difference array P ' 1 [n], P ' 2jRepresent j-th of number in the bottom difference array P ' 2 [n]
Value；
Step 709：Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is more than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-
P’2j+1Whether 1mm is more than, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；
Step 710：Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is less than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-
P’2j+1Whether 1mm is less than, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, defect point is recorded；
Step 711：According to the waypoint respectively to the top array P12 [n] and the lower light curtain length array P2
[n] is segmented, and obtains multistage position coordinates subnumber group, and top subnumber group corresponding with each fragment position coordinate subnumber group
With lower light curtain length subnumber group；
Step 712：To the top subnumber group corresponding to each section of position coordinates subnumber group and the lower light curtain length
Degree subnumber group makees fitting a straight line respectively, obtains top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；
Step 713：Calculate between the top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 away from
From d；Calculate the top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 average length l；
Step 714：Whether the design diameter of axle Di of judging distance d shaft parts corresponding with measured axis difference, which is less than the diameter of axle, is missed
Poor threshold value, if it is determine that the diameter of axle of the shaft part of measured axis is qualified, it is otherwise unqualified；Judge average length l and measured axis
Whether the design axial length Li of upper corresponding shaft part difference is less than axial length error threshold, if it is determines the shaft part of measured axis
Axial length is qualified, otherwise unqualified.
The data detected in the data handling procedure of the detection method using finite difference to light through mode sensor group
Handled, the waypoint and defect point of measured axis can be obtained.Reuse line fitting method processing light through mode sensor
The data of group detection, the measured axis lower edges point obtained to light through mode sensor group measurement carry out fitting a straight line, Jin Erji
The distance between two fitting a straight lines are calculated, directly subtract each other the parameter detected to top and the bottom sensor so as to avoid, or only
The problem of measured value and calculated value caused by the distance of the fixed point-to-point transmission of detection are unilateral, the degree of accuracy is low, and then eliminate up and down
Portion's sensor mounting location and guide rail rail out of plumb and caused alignment error, improve measurement accuracy.
As an alternative embodiment, the method for obtaining calibrating parameters A specifically includes：
Obtain the position coordinates P*3, structure position coordinates array P*3 [n] of the standard axle of the gauge outfit detection of grating scale；
The upper light curtain length corresponding with the position coordinates P*3 of the standard axle of light through mode sensor group detection is obtained simultaneously
Spend P*1 and lower light curtain length P*2；
Fitting a straight line is carried out to the upper light curtain length P*1 and the lower light curtain length P*2 respectively, obtained and the glazing
Straight line J corresponding to curtain length P11x+K1y+L1Straight line J corresponding to=the 0 and lower light curtain length P22x+K2y+L2=0；
According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A：
Wherein x be Points on Straight Line abscissa value, y be Points on Straight Line ordinate value, J1、K1、L1Respectively upper light curtain measurement is straight
The straight line parameter of line, J2, K2, L2 be respectively lower light curtain measurement straight line straight line parameter, R is the diameter of axle of standard axle, J=(J1+
J2)/2, K=(K1-K2)/2。
Calibrating parameters A derivation is as follows：
In order to which the measurement data of two sensors is unified under a coordinate system, by straight line J1x+K1y+L1=0 is transformed to
J1x+K1(A-y)+L1=0.Because straight line J1x+K1(A-y)+L1=0 and J2x+K2y+L2=0 is not fully parallel, in order to ask for
The distance between straight line to this two straight lines, it is necessary to do approximately parallel conversion.J1x+K1(A-y)+L1=0 can be expressed as
J1x-K1y+L1+K1A=0.In order that the new straight slope after two adjustment is identical, J and K are taken, meets J=(J1+J2)/2, K=
(K1-K2)/2, obtain two new straight line Jx-Ky+L1+K1A=0 and Jx+Ky+L2=0.Then the distance between two new straight lines can
ByDraw.Demarcated with a diameter of R standard axle, thenCan
As an alternative embodiment, the position coordinates array P3 [n], upper light curtain length number group P1 [n], lower light
Curtain length array P2 [n] and top array P12 [n] for length identical one digit number group.It can so ensure that a position is sat
Mark can correspond to the length of two light curtains up and down, so as to facilitate the acquisition of data, lookup and processing.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (2)
- A kind of 1. large-size axis parts detection method, it is characterised in that including：The manufacturing tolerance Pe of measured axis is set, the design diameter of axle Di and design axial length Li, wherein i of each section of measured axis represent the quilt Survey the hop count of axle；Obtain calibrating parameters A；The first motor is controlled to rotate；Obtain the position coordinates P3, structure position coordinates array P3 [n] of the gauge outfit detection of grating scale；The upper light curtain length P1 corresponding with the position coordinates P3 of light through mode sensor group detection and lower light curtain are obtained simultaneously Length P2, builds upper light curtain length number group P1 [n] and lower light curtain length array P2 [n] respectively, and wherein n is the number of element；According to calibrating parameters A, the top array P12 [n] of the upper light curtain length number group is calculated, in the top array P12 [n] Each element P12=A-P1；Finite difference is carried out to the top array P12 [n] and the lower light curtain length array P2 [n] respectively, obtaining respectively Top difference array P ' 1 [n] and bottom difference array P ' 2 [n]；Obtain respectively in the top difference array P ' 1 [n] and the bottom difference array P ' 2 [n] more than manufacturing tolerance Pe's Element P ' 1jAnd P ' 2j, and with the element P ' 1jAnd P ' 2jCorresponding position coordinates P3j, wherein P ' 1jRepresent that the top is poor J-th of numerical value in fraction set P ' 1 [n], P ' 2jRepresent j-th of numerical value in the bottom difference array P ' 2 [n]；Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is more than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether it is more than 1mm, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor waypoint；Judge P ' 1j-P’1j-1Or P ' 1j-P’1j+1Whether it is less than 1mm, and judges P ' 2j-P’2j-1Or P ' 2j-P’2j+1Whether it is less than 1mm, if it is, determining P ' 1jAnd P ' 2jCorresponding position coordinates P3jFor defect point, defect point is recorded；The top array P12 [n] and the lower light curtain length array P2 [n] are segmented respectively according to the waypoint, Obtain multistage position coordinates subnumber group, and top subnumber group corresponding with each fragment position coordinate subnumber group and lower light curtain length Subnumber group；The position coordinates array P3 [n], upper light curtain length number group P1 [n], lower light curtain length array P2 [n] and top number Group P12 [n] for length identical one digit number group；To the top subnumber group corresponding to each section of position coordinates subnumber group and the lower light curtain length subnumber group difference Make fitting a straight line, obtain top subnumber group straight line l1 and lower light curtain length subnumber group straight line l2 respectively；Calculate the distance between the top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 d；Described in calculating Top subnumber group straight line l1 and the lower light curtain length subnumber group straight line l2 average length l；Whether the design diameter of axle Di of judging distance d shaft parts corresponding with measured axis difference is less than diameter of axle error threshold, if Be then determine measured axis the shaft part the diameter of axle it is qualified, it is otherwise unqualified；Judge average length l with corresponding to shaft part on measured axis Whether design axial length Li difference is less than axial length error threshold, if it is determines that the axial length of the shaft part of measured axis is qualified, no It is then unqualified.
- 2. large-size axis parts detection method according to claim 1, it is characterised in that the acquisition calibrating parameters A, Specifically include：Obtain the position coordinates P*3, structure position coordinates array P*3 [n] of the standard axle of the gauge outfit detection of grating scale；The upper light curtain length P* corresponding with the position coordinates P*3 of the standard axle of light through mode sensor group detection is obtained simultaneously 1 and lower light curtain length P*2；Fitting a straight line is carried out to the upper light curtain length P*1 and the lower light curtain length P*2 respectively, obtains growing with the upper light curtain Spend straight line J corresponding to P11x+K1y+L1Straight line J corresponding to=the 0 and lower light curtain length P22x+K2y+L2=0；According to straight line J1x+K1y+L1=0 and J2x+K2y+L2=0 calibrating parameters A：Wherein x be Points on Straight Line abscissa value, y be Points on Straight Line ordinate value, J1、K1、L1Respectively upper light curtain measurement is straight The straight line parameter of line, J2、K2、L2For lower light curtain measure straight line straight line parameter, R be standard axle the diameter of axle, J=(J1+J2)/2, K =(K1-K2)/2。
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| CN106583885B (en) * | 2017-02-08 | 2022-06-14 | 武汉延锋时代检测技术股份有限公司 | Robot pipe welding device and method |
| CN109612396A (en) * | 2018-12-28 | 2019-04-12 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of automatic measurement mechanism based on LED light caliper |
| CN109974592A (en) * | 2019-03-28 | 2019-07-05 | 南京工程学院 | A kind of part size detection device and its detection method |
| CN110360959A (en) * | 2019-07-08 | 2019-10-22 | 东莞理工学院 | A kind of vision detection system for large-scale precision axial workpiece |
| CN110220467A (en) * | 2019-07-19 | 2019-09-10 | 中国科学院长春光学精密机械与物理研究所 | A kind of axle measuring machine |
| CN116045820A (en) * | 2023-03-31 | 2023-05-02 | 北京航天计量测试技术研究所 | Warhead length measuring method based on light curtain sensor |
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