CN104763928B - A kind of LED light source and its control method for NI Vision Builder for Automated Inspection - Google Patents
A kind of LED light source and its control method for NI Vision Builder for Automated Inspection Download PDFInfo
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- CN104763928B CN104763928B CN201510128214.1A CN201510128214A CN104763928B CN 104763928 B CN104763928 B CN 104763928B CN 201510128214 A CN201510128214 A CN 201510128214A CN 104763928 B CN104763928 B CN 104763928B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
- F21W2131/403—Lighting for industrial, commercial, recreational or military use for machines
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- General Engineering & Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a kind of LED light source and its control method for NI Vision Builder for Automated Inspection, the LED light source includes annular bottom plate, single-chip microcomputer and elevation carrection sensor, multiple conveyor tracks radially are evenly provided with annular bottom plate, conveyor track is provided with LED modules and the drive disk assembly for driving LED modules to be moved along conveyor track, elevation carrection sensor is arranged on the side of annular bottom plate, the distance value that single-chip microcomputer is used to be gathered according to elevation carrection sensor controls the action of multiple drive disk assemblies and then adjusts the radius for the sphere shape light array that multiple LED modules are constituted.After the distance value that the present invention can be by gathering LED light source and shadow surface, the action of control drive disk assembly is so as to adjust the radius of the sphere shape light array of multiple LED modules compositions, in the case of being illuminated in different height, realize Uniform Illumination, so that NI Vision Builder for Automated Inspection collects the preferable image of visual effect, it can be widely applied in NI Vision Builder for Automated Inspection.
Description
Technical field
The present invention relates to the light source field of machine vision, more particularly to a kind of LED light source for NI Vision Builder for Automated Inspection
And its control method.
Background technology
Machine vision technique is mainly the visual performance that the mankind are simulated with computer, is extracted from the image of objective things
Information, is handled and is understood, eventually for actually detected, measurement and control.Because machine vision is taken with machine
Observe and judge for human eye, so being usually used in the product quality detection of high volume production process, be not suitable for the hazardous environment of people
With the implacable occasion of human eye vision.And machine vision greatly improves the accuracy and speed of detection, it is to avoid eye-observation
The deviation and error brought.Therefore, machine vision is widely applied very much in every field, such as Aero-Space, industry, army
Thing, civilian etc. field.
The input port of NI Vision Builder for Automated Inspection is typically all image capturing system, for example industrial camera.One is collected to regard
Feel that effect is good, the big image of contrast can greatly reduce the image processing work amount in later stage.Illuminator is to determine to be gathered
The key factor of the quality of image.At present, the lighting source on the market applied to NI Vision Builder for Automated Inspection is usually ring illumination light
Source, the diameter that these ring illumination light sources are substantially fixed diameter, i.e. light source is immutable.
, just can only be at one if to maintain uniform illuminating effect for current this ring illumination light source
Moved in the range of smaller height change.NI Vision Builder for Automated Inspection is detected to different characteristic, generally requires different height
Illuminating ray, that is, need light incident from different directions.Therefore, when in order to meet the detection requirement of NI Vision Builder for Automated Inspection, to ring
When the height of shape lighting source is adjusted, often obtains irradiating uneven effect, cause the vision of gathered image to be imitated
It is really poor.
The content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of LED light for NI Vision Builder for Automated Inspection
Source, it is a further object of the present invention to provide a kind of control method of the LED light source for NI Vision Builder for Automated Inspection.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of LED light source for NI Vision Builder for Automated Inspection, including annular bottom plate, single-chip microcomputer and for gathering LED light source
With the elevation carrection sensor of the distance value of shadow surface, multiple transmission rails radially are evenly provided with the annular bottom plate
Road, the conveyor track is provided with LED modules and the drive disk assembly for driving LED modules to be moved along conveyor track, described
Elevation carrection sensor be arranged on annular bottom plate side, the single-chip microcomputer be used for according to elevation carrection sensor gathered away from
The action of multiple drive disk assemblies is controlled from value and then adjusts the radius of the sphere shape light array of multiple LED modules compositions.
Further, the annular bottom plate is provided with fixed branch in the end at the center of the close annular bottom plate of each conveyor track
Seat is supportted, the drive disk assembly is connected with fixed supporting seat, the drive disk assembly includes motor, motor supporting base, shaft coupling, silk
Bar, slider track and the sliding block that can be slided on slider track, the motor supporting base and slider track are installed in annular
On base plate, the motor is arranged on motor supporting base, and one end of the screw mandrel is by shaft coupling and motor connection, the screw mandrel
The other end be connected with fixed supporting seat, the sliding block is set on screw mandrel, and the LED modules are connected with sliding block, multiple transmissions
It is connected and moves consistent with single-chip microcomputer in parallel between the motor of part.
Further, the both sides of the sliding block are equipped with the pulley for being slided with movable slider on slider track.
Further, the annular bottom plate is mounted on spacing for being carried out to sliding block below the two ends of each screw mandrel
Travel switch.
Further, the LED modules include LED-baseplate, LED rectangular arrays and diffused reflector, LED rectangular arrays and unrestrained
Penetrate cover to be sequentially arranged in LED-baseplate, the LED-baseplate is reverse mounted on drive disk assembly.
Further, also including shell, the shell is just being provided with and the center to the position of the central opening of annular bottom plate
The centre bore for the identical size that is open.
Further, the single-chip microcomputer adjusts the radius for the sphere shape light array that multiple LED modules are constituted according to following formula：
In above formula, r represents the regulated value of the radius of the sphere shape light array of multiple LED modules compositions, and h represents elevation carrection
The distance value that sensor is gathered, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, m
Represent the coefficient related to the characteristics of luminescence of LED modules, r0Represent the photograph of the sphere shape light array of current time LED module composition
Bright radius.
The present invention solves another technical scheme for being used of its technical problem：
A kind of control method of LED light source for NI Vision Builder for Automated Inspection, including：
S1, the real-time distance value for using elevation carrection sensor collection LED light source apart from shadow surface；
S2, the distance value gathered according to elevation carrection sensor calculate the sphere shape light array of LED modules composition most
Good illumination radius；
After S3, the illumination radius for the sphere shape light array for obtaining current time LED module composition, calculate and obtain LED modules
Moving displacement；
S4, the moving displacement obtained according to calculating control the action of multiple drive disk assemblies to drive LED modules to be moved
It is dynamic.
Further, the step S2, it is specially：
With reference to following formula, the distance value gathered according to elevation carrection sensor calculates the sphere shape light battle array that LED modules are constituted
The optimal illumination radius of row：
In above formula, h represents the distance value that elevation carrection sensor is gathered, r1Represent current time LED module composition
The optimal illumination radius of sphere shape light array, m represents the coefficient related to the characteristics of luminescence of LED modules.
Further, the step S3, it is specially：
After the initial illumination radius for the sphere shape light array for obtaining LED modules composition, calculated according to following formula and obtain LED modules
Moving displacement r：
R=r1-r0
In above formula, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, r0Represent to work as
The illumination radius of the sphere shape light array of preceding moment LED modules composition.
The beneficial effects of the invention are as follows：A kind of LED light source for NI Vision Builder for Automated Inspection of the present invention, including annular bottom
Plate, single-chip microcomputer and for the elevation carrection sensor for the distance value for gathering LED light source and shadow surface, on the annular bottom plate
Multiple conveyor tracks radially are provided with evenly, and the conveyor track is provided with LED modules and for driving LED modules along biography
The drive disk assembly of dynamic rail road movement, the elevation carrection sensor is arranged on the side of annular bottom plate, and the single-chip microcomputer is used for root
The distance value gathered according to elevation carrection sensor controls the action of multiple drive disk assemblies and then adjusts multiple LED modules compositions
The radius of sphere shape light array.After the distance value that this LED light source can be by gathering LED light source and shadow surface, drive disk assembly is controlled
Action so as to adjust the radius of the sphere shape light array of multiple LED modules composition, so as to be in the direction for changing incident ray
In the case that different height is illuminated, Uniform Illumination can be also realized, can make it that NI Vision Builder for Automated Inspection collects visual effect preferable
Image.This LED light source is simple in construction and easy to adjust.
In addition, each LED modules of this LED light source are equipped with diffused reflector, it can make it that light is more uniform in spatial distribution,
Radiation response is evenly.
The present invention another beneficial effect be：A kind of control method of LED light source for NI Vision Builder for Automated Inspection, including：
S1, the real-time distance value for using elevation carrection sensor collection LED light source apart from shadow surface；S2, according to elevation carrection sensor
The distance value gathered calculates the optimal illumination radius of the sphere shape light array of LED modules composition；S3, acquisition current time LED
After the illumination radius of the sphere shape light array of module composition, the moving displacement for obtaining LED modules is calculated；S4, according to calculate obtain
Moving displacement control the action of multiple drive disk assemblies to drive LED modules to move.This control method can pass through collection
After the distance value of LED light source and shadow surface, the action of control drive disk assembly is so as to adjust the sphere shape light of multiple LED modules compositions
The radius of array, so that in the case of being different height illumination in the direction for changing incident ray, Uniform Illumination can be also realized, can
Make it that NI Vision Builder for Automated Inspection collects the preferable image of visual effect.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of the first dimensional structure diagram of LED light source for NI Vision Builder for Automated Inspection of the present invention；
Fig. 2 is a kind of the second dimensional structure diagram of LED light source for NI Vision Builder for Automated Inspection of the present invention；
Fig. 3 is a kind of internal structure schematic diagram of LED light source for NI Vision Builder for Automated Inspection of the present invention；
Fig. 4 is a kind of structural representation of the shell of LED light source for NI Vision Builder for Automated Inspection of the present invention；
Fig. 5 is the schematic diagram for the cartesian coordinate system that a specific embodiment of the invention is set up；
Fig. 6 be the present invention a specific embodiment in LED light source illuminator level be 140mm when, the Illumination Distribution of shadow surface
Figure；
Fig. 7 is the illumination curve figure at the straight line x=0 in Fig. 6.
Embodiment
Referring to Figures 1 and 2, the invention provides a kind of LED light source for NI Vision Builder for Automated Inspection, including annular bottom plate 1,
Single-chip microcomputer and for the elevation carrection sensor 21 for the distance value for gathering LED light source and shadow surface, on the annular bottom plate 1
Multiple conveyor tracks 16 radially are evenly provided with, the conveyor track 16 is provided with LED modules and for driving LED moulds
The drive disk assembly that group is moved along conveyor track 16, the elevation carrection sensor 21 is arranged on the side of annular bottom plate 1, the list
The distance value that piece machine is used to be gathered according to elevation carrection sensor 21 controls the action of multiple drive disk assemblies and then adjusted multiple
The radius of the sphere shape light array of LED modules composition.
It is further used as preferred embodiment, reference picture 3, the annular bottom plate 1 is close each conveyor track 16
The end at the center of annular bottom plate 1 is provided with fixed supporting seat 2, and the drive disk assembly is connected with fixed supporting seat 2, the driving section
Part includes motor 11, motor supporting base 13, shaft coupling 10, screw mandrel 9, slider track 3 and the cunning that can be slided on slider track 3
Block 4, the motor supporting base 13 and slider track 3 are installed on annular bottom plate 1, and the motor 11 is arranged on motor supporting base
On 13, one end of the screw mandrel 9 is connected by shaft coupling 10 with motor 11, and the other end and the fixed supporting seat 2 of the screw mandrel 9 connect
Connect, the sliding block 4 is set on screw mandrel 9, the LED modules are connected with sliding block 4, it is in parallel between the motor 11 of multiple drive disk assemblies
Ground is connected with single-chip microcomputer and moved consistent.
It is further used as preferred embodiment, the both sides of the sliding block 4 are equipped with for band movable slider 4 in slider track
The pulley 5 slided on 3.
It is further used as preferred embodiment, the annular bottom plate 1 is mounted on below the two ends of each screw mandrel 9
For carrying out spacing travel switch 20 to sliding block 4.
It is further used as preferred embodiment, the LED modules include LED-baseplate 6, LED rectangular arrays 8 and diffused reflector
14, the LED rectangular arrays 8 and diffused reflector 14 are sequentially arranged in LED-baseplate 6, and the LED-baseplate 6 is reverse mounted in transmission
On part.
It is further used as preferred embodiment, reference picture 4, also including shell 17, the shell 17 is just to annular bottom
The position of the central opening of plate 1 is provided with the centre bore 18 of size identical with the central opening.
It is further used as preferred embodiment, the single-chip microcomputer adjusts the circle that multiple LED modules are constituted according to following formula
The radius of array of source：
In above formula, r represents the regulated value of the radius of the sphere shape light array of multiple LED modules compositions, and h represents elevation carrection
The distance value that sensor 21 is gathered, r1The optimal illumination radius of the sphere shape light array of current time LED module composition is represented,
M represents the coefficient related to the characteristics of luminescence of LED modules, r0Represent the sphere shape light array of current time LED module composition
Illuminate radius.
Present invention also offers a kind of control method of the LED light source for NI Vision Builder for Automated Inspection, including：
S1, the real-time distance value for using the collection LED light source of elevation carrection sensor 21 apart from shadow surface；
S2, the distance value gathered according to elevation carrection sensor 21 calculate the sphere shape light array that LED modules are constituted
Optimal illumination radius；
After S3, the illumination radius for the sphere shape light array for obtaining current time LED module composition, calculate and obtain LED modules
Moving displacement；
S4, the moving displacement obtained according to calculating control the action of multiple drive disk assemblies to drive LED modules to be moved
It is dynamic.
It is further used as preferred embodiment, the step S2, it is specially：
With reference to following formula, the distance value gathered according to elevation carrection sensor 21 calculates the sphere shape light that LED modules are constituted
The optimal illumination radius of array：
In above formula, h represents the distance value that elevation carrection sensor 21 is gathered, r1Represent current time LED module composition
Sphere shape light array optimal illumination radius, m represents the coefficient related to the characteristics of luminescence of LED modules.
It is further used as preferred embodiment, the step S3, it is specially：
After the initial illumination radius for the sphere shape light array for obtaining LED modules composition, calculated according to following formula and obtain LED modules
Moving displacement r：
R=r1-r0
In above formula, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, r0Represent to work as
The illumination radius of the sphere shape light array of preceding moment LED modules composition.
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one
Referring to figs. 1 to Fig. 4, a kind of LED light source for NI Vision Builder for Automated Inspection, including annular bottom plate 1, single-chip microcomputer and use
It is multiple along footpath in being evenly provided with collection LED light source and the elevation carrection sensor 21 of the distance value of shadow surface, annular bottom plate 1
To conveyor track 16, conveyor track 16 is provided with LED modules and for driving what LED modules were moved along conveyor track 16
Drive disk assembly, elevation carrection sensor 21 is arranged on the side of annular bottom plate 1, and single-chip microcomputer is used for according to elevation carrection sensor 21
The distance value gathered controls the half of the sphere shape light array of the action of multiple drive disk assemblies and then the multiple LED modules compositions of regulation
Footpath.Multiple LED modules are centrosymmetric distribution on the center of annular bottom plate 1.The LED modules of the present invention can be in transmission
Moved under the drive of part along conveyor track 16, thus this LED light source radius be it is adjustable, can different height illumination
The radius of the annular array of LED modules composition is adjusted under environment, can be with so that while the lighting requirement of different height is met
Uniform Illumination is realized in the same old way.
In the present embodiment, the quantity of conveyor track 16 is even number.As shown in Fig. 2 conveyor track 16 radially refers to often
Individual conveyor track 16 was respectively distributed on a straight line at the center of annular bottom plate 1, and all conveyor tracks 16 can be regarded as
It is evenly distributed on a circular multiple radiuses.
It is noted that Fig. 1 is the simple dimensional structure diagram of this LED light source, annular bottom plate 1, transmission are mainly shown
Relation between track 16, does not limit the form of implementation of detailed drive disk assembly and LED modules.Fig. 3 illustrates the present embodiment
Drive disk assembly and LED modules a kind of implementation, close annular bottom plate 1 of the annular bottom plate 1 in each conveyor track 16
The end at center is provided with fixed supporting seat 2, and drive disk assembly is connected with fixed supporting seat 2, and drive disk assembly includes motor 11, motor branch
Seat 13, shaft coupling 10, screw mandrel 9, slider track 3 and the sliding block 4 that can be slided on slider track 3 are supportted, motor supporting base 13 leads to
Cross connector to be fixed on annular bottom plate 1, slider track 3 is arranged on annular bottom plate 1, motor 11 is arranged on electricity by screw 12
On machine support base 13, one end of screw mandrel 9 is connected by shaft coupling 10 with motor 11, and the other end and the fixed supporting seat 2 of screw mandrel 9 connect
Connect, sliding block 4 is set on screw mandrel 9, LED modules are connected with sliding block 4 by screw 7, between the motor 11 of multiple drive disk assemblies simultaneously
Connection ground is connected with single-chip microcomputer and moved unanimously, so that LED modules can keep uniform annular array, remains uniform and shines
Degree.
It is preferred that, the both sides of sliding block 4 are equipped with the pulley 5 for being slided with movable slider 4 on slider track 3.Sliding block 4 with
Pulley 5 is connected by screw 19, and pulley 5 is to reduce the frictional force of the movement of sliding block 4, the pulleys 5 of the both sides of sliding block 4 and sliding block rail
Road 3 coordinates, and realizes slidably reciprocating for sliding block 4, so that the motion of LED modules is driven, so that in the illumination ring of different height
Under border, the diameter of this LED light source can be adjusted by adjusting the motion of LED modules, so as to realize Uniform Illumination.Fig. 1 and Fig. 3
In in order to show other components of LED light source, a slider track 3 is only depicted, in fact, the quantity of slider track 3 is
Two, the two ends of screw mandrel 9 are symmetrically dispersed in, sliding block 4 comes under the pulley 5 of both sides and the cooperation of slider track 3 on leading screw 9
Return and slide.
It is preferred that, annular bottom plate 1 is mounted on spacing for being carried out to sliding block 4 below the two ends of each screw mandrel 9
Travel switch 20, travel switch 20 can anti-limited slip block 4 displacement exceed stroke range.
During LED modules are the illumination module being made up of LED, the present embodiment, LED modules include LED-baseplate 6, LED rectangles
Array 8 and diffused reflector 14, LED rectangular arrays 8 and diffused reflector 14 are sequentially arranged in LED-baseplate 6, LED-baseplate 6 it is reverse mounted
On drive disk assembly.In detail, diffused reflector 14 is arranged in LED-baseplate 6 by chock 15.The LED modules of this LED light source are being used
Irradiation is directed towards under state, " LED-baseplate 6 is reverse mounted on drive disk assembly " describes this LED light source in use state
Under installation situation.Diffused reflector 14 can make it that the light that LED rectangular arrays are sent is more uniform in spatial distribution so that irradiation
Effect is evenly.
This LED light source also includes shell 17, shell 17 just the position of the central opening of annular bottom plate 1 is provided with this
The centre bore 18 of the identical size of heart opening.Centre bore 18 is used as the entrance of NI Vision Builder for Automated Inspection camera acquisition image, video camera
The lower section for reaching this LED light source through centre bore 18 carries out IMAQ.
In actually used, the LED light source of the present embodiment is additionally provided with the shift knob of the working condition of control LED modules, with
And the play button that the radius of the sphere shape light array of LED power is adjusted for control single chip computer, to this LED light source
Concrete operation step is as follows：
Step 1, this LED light source is fixed on to the IMAQ end of Machine Vision Inspecting System, and causes IMAQ
The axle center of the video camera at end is with light source center perforate to the heart.
Step 2, the scope of feature is detected as needed, the height that this LED light source is adjusted to adapt to.
Step 3, shift knob, the work of LED modules are pressed；Press play button, the detection irradiation of elevation carrection sensor 21
Face highly, and by Single-chip Controlling, automatically adjusts the radius of the sphere shape light array of LED modules composition, light source life's work,
Video camera starts to gather image.
Step 4, when light source irradiation height changes, after regulation light source height, then play button is pressed, adjusted again
Save the radius of the sphere shape light array of LED modules composition.
Step 5, when system work is finished, SR is pressed so that initial position is restored in the position of LED modules, then presses
Lower shift knob, closes light source.
The radius of the sphere shape light array of single-chip microcomputer regulation LED module compositions, is entered according to following formula in step 3 and step 4
Capable：
In above formula, r represents the regulated value of the radius of the sphere shape light array of multiple LED modules compositions, and h represents elevation carrection
The distance value that sensor 21 is gathered, r1The optimal illumination radius of the sphere shape light array of current time LED module composition is represented,
M represents the coefficient related to the characteristics of luminescence of LED modules, r0Represent the sphere shape light array of current time LED module composition
Illuminate radius.
Embodiment two
A kind of control method of LED light source for NI Vision Builder for Automated Inspection, including：
S1, the real-time distance value for using the collection LED light source of elevation carrection sensor 21 apart from shadow surface；
S2, the distance value gathered according to elevation carrection sensor 21 calculate the sphere shape light array that LED modules are constituted
Optimal illumination radius；
After S3, the illumination radius for the sphere shape light array for obtaining current time LED module composition, calculate and obtain LED modules
Moving displacement；
S4, the moving displacement obtained according to calculating control the action of multiple drive disk assemblies to drive LED modules to be moved
It is dynamic.
In the present embodiment, step S2 is specially：
With reference to following formula, the distance value gathered according to elevation carrection sensor 21 calculates the sphere shape light that LED modules are constituted
The optimal illumination radius of array：
In above formula, h represents the distance value that elevation carrection sensor 21 is gathered, r1Represent current time LED module composition
Sphere shape light array optimal illumination radius, m represents the coefficient related to the characteristics of luminescence of LED modules.
In the present embodiment, step S3 is specially：
After the initial illumination radius for the sphere shape light array for obtaining LED modules composition, calculated according to following formula and obtain LED modules
Moving displacement r：
R=r1-r0
In above formula, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, r0Represent to work as
The illumination radius of the sphere shape light array of preceding moment LED modules composition.
Detailed, with reference to the embodiment of drive disk assembly in Fig. 3, if the pitch of screw mandrel 9 is p, motor 11 is per M arteries and veins
Rush rotation to turn around, it is desirable to which speed is N circles/second, then pulse frequency is MHz, and the pulse period isThen calculate in step s3
Obtain after moving displacement r, the umber of pulse that MCU driving motor 11 needs is
The principle that the present embodiment carries out radius regulation to LED light source is described below：
The LED light source of embodiment one is to belong to direct illumination light source.Convex and concave feature of the direct illumination primarily directed to workpiece
Illumination, in order to highlight the feature for needing to detect, such as plateau, blind hole etc..The annular of current direct illumination on the market
Light source is often fixed form.This fixed form light source to understand without being told in shadow surface when different height is illuminated, often
Degree is higher or relatively low, is difficult to realize Uniform Illumination.And the LED light source of the present embodiment, the circular light that LED modules can be controlled to constitute
The radius of source array, when realizing different height illumination, can also obtain the more uniform visual effect of illumination.Its principle is exactly to meet to shine
It is respectively zero to penetrate first order derivative and second derivative of the illumination curve in face at the center of shadow surface.As shown in figure 5, with shadow surface
Center is the origin of coordinates, sets up cartesian coordinate system (x, y, z).Then the illumination formula E (x, y) of shadow surface is shown in formula (1).
Wherein, I0For LED normal luminous intensity degree, m represents the coefficient related to the characteristics of luminescence of LED modules, and θ represents any
The center of LED modules and the angle of the line of origin and its normal, d represent the center of any LED modules and the distance of origin,
(xi,yi, it is h) the centre coordinate value of LED modules, wherein h represents light source illuminator level.Because LED modules constitute sphere shape light
Array, and matrix number is even number.If the number of LED modules is N, then the centre coordinate value of n-th group LED modules can beWherein l is the radius for the sphere shape light array that LED modules are constituted.Then formula (1) can turn to formula
Sub (2), it is as follows.
To be evenly illuminated effect, required according to described above, formula (3), (4) should be met.Because N is even number,
So formula (3) perseverance is met.So can be obtained by formula (4), effect, illuminator level h and LED are evenly illuminated
The circular radius l of module should meet function formula (5).
Formula (5) is illuminator level h and the circular radius l of LED modules functional relation.By change the height of light source come
While changing incident ray direction, and reach that the illumination of uniform irradiation is imitated with the circular radius l of the LED modules matched
Really.Figure of description 6 is that NI Vision Builder for Automated Inspection LED light source illuminator level of the present invention is 140mm, the Illumination Distribution figure of shadow surface.
Fig. 7 is the illumination curve at Fig. 6 cathetus x=0, and by can be seen that in figure, the uniformity for being in 100mm~-100mm scopes is
86% (minimal illumination divided by maximal illumination).
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to embodiment, ripe
A variety of equivalent variations or replacement can also be made on the premise of without prejudice to spirit of the invention by knowing those skilled in the art, these
Equivalent modification or replacement is all contained in the application claim limited range.
Claims (7)
1. a kind of LED light source for NI Vision Builder for Automated Inspection, it is characterised in that including annular bottom plate (1), single-chip microcomputer and be used for
It is evenly provided with the elevation carrection sensor (21) of the distance value of collection LED light source and shadow surface, the annular bottom plate (1) many
Individual conveyor track (16) radially, the conveyor track (16) is provided with LED modules and for driving LED modules along transmission
The mobile drive disk assembly of track (16), the elevation carrection sensor (21) is arranged on the side of annular bottom plate (1), the monolithic
The distance value that machine is used to be gathered according to elevation carrection sensor (21) controls the action of multiple drive disk assemblies and then adjusted multiple
The radius of the sphere shape light array of LED modules composition；
The LED modules include LED-baseplate (6), LED rectangular arrays (8) and diffused reflector (14), the LED rectangular arrays (8) and
Diffused reflector (14) is sequentially arranged in LED-baseplate (6), and the LED-baseplate (6) is reverse mounted on drive disk assembly；
The annular bottom plate (1) is provided with fixed branch in the end at the center of the close annular bottom plate (1) of each conveyor track (16)
Seat (2) is supportted, the drive disk assembly is connected with fixed supporting seat (2), the drive disk assembly includes motor (11), motor supporting base
(13), shaft coupling (10), screw mandrel (9), slider track (3) and the sliding block (4) that can be slided on slider track (3), the electricity
Machine support base (13) and slider track (3) are installed on annular bottom plate (1), and the motor (11) is arranged on motor supporting base
(13) on, one end of the screw mandrel (9) is connected by shaft coupling (10) with motor (11), and the other end of the screw mandrel (9) is with consolidating
Determine support base (2) connection, the sliding block (4) is set on screw mandrel (9), and the LED modules are connected with sliding block (4), multiple transmissions
It is connected and moves consistent with single-chip microcomputer in parallel between the motor (11) of part.
2. a kind of LED light source for NI Vision Builder for Automated Inspection according to claim 1, it is characterised in that the sliding block (4)
Both sides be equipped with for the pulley (5) that is slided with movable slider (4) on slider track (3).
3. a kind of LED light source for NI Vision Builder for Automated Inspection according to claim 1, it is characterised in that the annular bottom
Plate (1) is mounted on being used to carry out sliding block (4) on spacing travel switch (20) below the two ends of each screw mandrel (9).
4. a kind of LED light source for NI Vision Builder for Automated Inspection according to any one of claims 1 to 3, it is characterised in that also
Including shell (17), the shell (17) is just being provided with and the central opening phase to the position of the central opening of annular bottom plate (1)
With the centre bore (18) of size.
5. a kind of LED light source for NI Vision Builder for Automated Inspection according to any one of claims 1 to 3, it is characterised in that institute
State the radius that single-chip microcomputer adjusts the sphere shape light array that multiple LED modules are constituted according to following formula：
In above formula, r represents the regulated value of the radius of the sphere shape light array of multiple LED modules compositions, and h represents that elevation carrection is sensed
The distance value that device (21) is gathered, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, m
Represent the coefficient related to the characteristics of luminescence of LED modules, r0Represent the photograph of the sphere shape light array of current time LED module composition
Bright radius.
6. a kind of control method of LED light source for NI Vision Builder for Automated Inspection, it is characterised in that including：
S1, the real-time distance value for using elevation carrection sensor (21) collection LED light source apart from shadow surface；
S2, the distance value gathered according to elevation carrection sensor (21) calculate the sphere shape light array of LED modules composition most
Good illumination radius；
After S3, the illumination radius for the sphere shape light array for obtaining current time LED module composition, the shifting for obtaining LED modules is calculated
Dynamic displacement；
S4, the moving displacement obtained according to calculating control the action of multiple drive disk assemblies to drive LED modules to move；
The step S2, it is specially：
With reference to following formula, the distance value gathered according to elevation carrection sensor (21) calculates the sphere shape light battle array that LED modules are constituted
The optimal illumination radius of row：
In above formula, h represents the distance value that elevation carrection sensor (21) is gathered, r1Represent the circle of current time LED module composition
The optimal illumination radius of shape array of source, m represents the coefficient related to the characteristics of luminescence of LED modules.
7. a kind of control method of LED light source for NI Vision Builder for Automated Inspection according to claim 6, it is characterised in that
The step S3, it is specially：
After the initial illumination radius for the sphere shape light array for obtaining LED modules composition, the shifting for obtaining LED modules is calculated according to following formula
Dynamic displacement r：
R=r1-r0
In above formula, r1Represent the optimal illumination radius of the sphere shape light array of current time LED module composition, r0When representing current
Carve the illumination radius of the sphere shape light array of LED modules composition.
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| CN105953138B (en) * | 2015-12-31 | 2018-08-07 | 广东工业大学 | A kind of machine vision light source device that light spot shape is controllable and its implementation |
| US9857060B2 (en) * | 2016-04-02 | 2018-01-02 | Wing Kong Lo | LED illumination control systems and methods |
| CN106016181B (en) * | 2016-06-08 | 2020-04-28 | 广东工业大学 | Automatic light source adjusting device for machine vision system |
| CN106871084B (en) * | 2017-03-24 | 2023-05-09 | 广州市浩洋电子股份有限公司 | Stage lamp with movable light source system |
| CN114484337B (en) * | 2020-01-18 | 2023-08-25 | 深圳市强流明光电有限公司 | High-reliability industrial and mining lamp |
| CN115247771A (en) * | 2022-09-19 | 2022-10-28 | 苏州视谷视觉技术有限公司 | Lighting device for machine vision |
| CN115824595B (en) * | 2023-02-13 | 2023-04-28 | 东莞市雅光机械有限公司 | UV curing light source uniformity detection adjustment system |
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