CN106680298A - Printed circuit board (PCB) detection device and PCB detection method - Google Patents
Printed circuit board (PCB) detection device and PCB detection method Download PDFInfo
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- CN106680298A CN106680298A CN201611170426.7A CN201611170426A CN106680298A CN 106680298 A CN106680298 A CN 106680298A CN 201611170426 A CN201611170426 A CN 201611170426A CN 106680298 A CN106680298 A CN 106680298A
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- pcb board
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N2021/95638—Inspecting patterns on the surface of objects for PCB's
Abstract
The invention provides a printed circuit board (PCB) detection device, comprising a board carrying device, a light source system, an image sensor and a controller, wherein the board carrying device is used for carrying a PCB; the light source system is used for irradiating the PCB; the image sensor is used for acquiring the image information of the irradiated PCB; the controller is connected with a charge coupled device (CCD) and is used for controlling the light source system so as to adjust the chroma and brightness of a light source; the light source system comprises at least one group of lamp bulbs; each group of lamp bulbs comprise a red lamp bulb, a green lamp bulb, a blue lamp bulb and a white lamp bulb; lights with different chromas can be synthesized by turning on one or more lamp bulbs. The four lamp bulbs with primary colors are integrated by each group of lamp bulbs provided by the invention, and the lights with different chromas corresponding to multiple PCBs can be generated in one group of lamp bulbs, so that the problems in the prior art are well solved.
Description
Technical field
The present invention relates to pcb board outward appearance detection technique field, and in particular to a kind of AVI self adaptations light source regulating system.
Background technology
Pcb board is printed circuit board, also known as printed circuit board (PCB), with insulation board as base material, is cut into certain size, thereon at least
With a conductive pattern, and hole (such as component hole, fastener hole, plated through-hole) is furnished with, for replacing conventional device electronics unit
The chassis of device, and realize being connected with each other between electronic devices and components.
In prior art, when the solder joint on to pcb board is detected, typically operator is examined with eyes
Look into, visual fatigue is occurred through long-time operation using hand inspection, cause missing inspection, false retrieval so that pcb board low production efficiency
Under.
For this purpose, the method detected to pcb board using monochromatic light is proposed in prior art, by bulb such as fluorescent lamp
The monochromatic light of generation, is irradiated to pcb board, face after light is irradiated on pcb board, at the defective position of pcb board
Color can have any different with the color of other normal positions, and the defective locations on pcb board are determined by the method.But, pcb board
Number of different types, the color of each type there is also difference, during detecting to pcb board, need in streamline
The plate of upper detection number of different types, it is therefore desirable to which being correspondingly arranged multiclass can produce the fluorescent lamp of different colourities, while in inspection
It is also required to switch over multiple fluorescent lamps during survey, this is unfavorable for the miniaturization of whole detection means and detection efficiency
Improve.
The content of the invention
Therefore, the technical problem to be solved in the present invention is to overcome in prior art using monochromater to different type
The defect that fitness is relatively low when pcb board is detected, detection efficiency is not high.
For this purpose, the present invention provides a kind of pcb board detection means, including：Support plate device, for carrying pcb board；Light-source system,
To irradiate the pcb board；Imageing sensor, for obtaining the image information of irradiated pcb board；Controller, connects with CCD
Connect, colourity and the brightness of light source is adjusted to control light-source system；The light-source system includes：Bulb group, at least one group,
It is red, green, blue, four white bulbs that the bulb group has color, by opening one or more described bulbs, to synthesize not
With the light of colourity.
Described pcb board detection means also includes angular adjustment frame, including several are connected with each other and horizontal by not
With the adjustable plate at inclination angle, the bulb group is installed on the adjustable plate.
Described pcb board detection means also includes：Some D/A converters, respectively with the bulb group in each color
Bulb is electrically connected, and can receive the signal of the controller to control the opening and closing of bulb, and can be passed through under the control of the controller
Regulation flows through the size of lamp current to change the brightness of bulb.
Described pcb board detection means also includes diffuser plate, is arranged on the path of the incident ray of the bulb group, uses
In the incident ray of the bulb group is fully scattered on pcb board.
Described pcb board detection means also includes：Half-reflecting half mirror, to the incident illumination for receiving the bulb group transmitting
Line, obtains the reflection light of vertical direction, and the reflection light of vertical direction passes through described in pcb board surface reflection tailing edge original route
Half-reflecting half mirror is entered in the CCD above the half-reflecting half mirror.
Described pcb board detection means also includes：Black background plate, it is anti-through described half to absorb the incident ray
The light transmitted after pellicle mirror, prevents the light for passing through from impacting to detection into imageing sensor.
The light-source system, described image sensor and the angular adjustment frame are respectively two groups, and each relatively described
The setting symmetrical above and below of support plate device.
Present invention simultaneously provides a kind of pcb board detection method, comprises the steps：S1. by opening the one of different colours
Plant or various bulbs so that light-source system produces the light source of required colourity；S2. the luminous flux of the light source to producing in step S1 enters
Row is adjusted, and makes the luminous flux of light source position consistent；S3. using the light source irradiation pcb board after adjusting；S4. pcb board is obtained
Image information；S5. the color distinction in the reflected light of pcb board zones of different is analyzed, defect present in pcb board is determined.
Comprise the steps in step S2：
A. blank is irradiated using the light source produced in step S1；
B. obtain the image information of irradiated blank using imageing sensor and image is analyzed；
C. controller receives the signal that imageing sensor sends, and the brightness to light source is adjusted.
In step S4 and S5, adopt CCD as imageing sensor to obtain the image information of pcb board and carry out point
Analysis.
In step S3, also include that angle is adjusted between the light sent to the light-source system and pcb board
The step of, there is good reflective function to make detected part on pcb board.
Technical solution of the present invention, has the advantage that：
1. the pcb board detection means that the present invention is provided, including：Support plate device, for carrying pcb board；Light-source system, to shine
Penetrate the pcb board；Imageing sensor, for obtaining the image information of irradiated pcb board；Controller, is connected with CCD, to
Control light-source system to adjust colourity and the brightness of light source；The light-source system includes：Bulb group, at least one group, the lamp
It is red, green, blue, four white bulbs that bubble group has color, by opening one or more described bulbs, to synthesize different colourities
Light.
Bulb group is constituted using four colored lights bubble, and from for optical angle, red, green, blue, Bai Si kinds color can be combined and come from
So the various light on boundary, such as red to produce yellow with green superposition, and red superposition with blueness can produce pink, etc..Than
Such as when needing to detect pcb board using red light, need to open red bulb, the bulb of other three kinds of colors is closed；
When needing to detect pcb board using sodium yellow, red and starboard sidelight: green bulb is opened, allow the light of two kinds of colors to produce after being superimposed
SHENGHUANG coloured light, is then irradiated to pcb board.
Light-source system of the prior art, can only produce the light of single colourity, after different classes of pcb board is changed,
New light source, complex operation and consuming time are dismantled and installed to needs.
And the bulb group that the present invention is provided, four kinds of primary colours bulbs are integrated with, by the combination of four kinds of primary colours bulbs, Ke Yi
The light of the different colourities corresponding from various pcb boards is produced in single bulb group, so as to solve well in prior art
The problem of presence.
2. the pcb board detection means that the present invention is provided, also including angular adjustment frame, including several are connected with each other and and water
Adjustable plate of the plane in different angle, is provided with the bulb group on the adjustable plate.
To different types of defect on pcb board, some need adopt light perpendicular with defect, some need using with
Defect light in a certain angle is detected, by angular adjustment frame, can generate the light in different angles from defect, is carried
The high power of test of whole detection means.
3. the pcb board detection means that the present invention is provided, including：Some D/A converters, respectively with the bulb group in it is every
The bulb electrical connection of kind of color, can receive the signal of the controller to control the opening and closing of bulb, and can be by controller
Control lower the size of throttling Jing lamp currents to change the brightness of bulb.
By controlling the opening and closing of bulb so as to the colourity of quick control light source, meanwhile, by the input for setting D/A converter
Current value can control the current value size entered in bulb, so as to control the brightness of bulb.
4. the pcb board detection means that the present invention is provided, also including diffuser plate, is arranged on the incident ray of the bulb group
On path, for the incident ray of the bulb group fully to be scattered to into pcb board.So as to effectively raise source light
Utilization rate.
5. the pcb board detection means that the present invention is provided, also includes：Half-reflecting half mirror, to receive the bulb group transmitting
Incident ray, obtain the reflection light of vertical direction, the reflection light of vertical direction reflects tailing edge original route on pcb board surface
Entered in the CCD above the half-reflecting half mirror by the half-reflecting half mirror.
Because light-source system is in the oblique upper of pcb board, and CCD is arranged on the surface of pcb board, therefore by half-reflection and half-transmission
Mirror, can be transformed into the light of vertical direction hence into in CCD by the incident ray of horizontal level.If directly using not
Reflecting mirror with transmission function, then the reflection light of pcb board will be unable to penetrate reflecting mirror, hinder reflection light and enter CCD
In.
6. the pcb board detection means that the present invention is provided, also includes：Black background plate, to absorb the incident ray Jing
The light transmitted after the half-reflecting half mirror is crossed, prevents the light for passing through from impacting to detection into imageing sensor.
7. the pcb board detection means that the present invention is provided, the light-source system, described image sensor and the angular adjustment
Frame is respectively two groups, and each relatively described support plate device setting symmetrical above and below.
Symmetrically arranged light-source system and imageing sensor can be used to recognize the defect of the class of hole one on PCB, adopt and be located at
When the light-source system of pcb board side is irradiated to pcb board, if there is hole on pcb board, positioned at the figure of pcb board opposite side
As sensor can detect the light passed through from hole, so as to complete the detection of device to hole.
8. the present invention provides a kind of pcb board detection method, comprises the steps：
S1. by one or more bulb of opening different colours so that light-source system produces the light source of required colourity；
S2. the luminous flux of the light source to producing in step S1 is adjusted, and makes the luminous flux of light source position consistent；S3. using tune
Light source irradiation pcb board after section；S4. the image information of pcb board is obtained；S5. the face in the reflected light of pcb board zones of different is analyzed
Aberration not, determines defect present in pcb board.
When being detected to pcb board using monochromatic light, the corresponding bulb in pcb board middle part is more, by light intensity, two edge
The corresponding bulb in position is less, and light is weak, and this can cause the brightness of pcb board middle part to be higher than both sides.So in detection process
In, if adopting identical standard to pcb board middle part and both sides, because the interference of light will produce inaccurate knot
Really, for example the middle part defect that obtains of detection be by light it is excessively bright caused by, and be not that the defect of pcb board itself is caused
's.
Therefore, in step s 2, the luminous flux of the light source to producing in step S1 is adjusted, and makes light source position
Luminous flux is consistent, so as to avoid the detection error produced due to light.
9. the present invention provides a kind of pcb board detection method, comprises the steps in step S2：
A. blank is irradiated using the light source produced in step S1；
B. obtain the image information of irradiated blank using imageing sensor and image is analyzed；
C. controller receives the signal that imageing sensor sends, and the brightness to light source is adjusted.
Using blank through light source, blank object is identical to the reflectance of light component (red, green, blue), thereby, it is ensured that instead
Light is penetrated in blank free of losses, so as to provide basis for detection in step b and step c.
10. the present invention provides a kind of pcb board detection method, in step S3, also includes sending out the light-source system
The step of angle is adjusted between the light for going out and pcb board, has good reflective to make detected part on pcb board
Energy.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
The structural representation of the pcb board detection means that Fig. 1 is provided for the present invention；
Fig. 2 is the schematic diagram of the light reception intensity in embodiment 2 using each position of statistic law analysis of the image.
Description of reference numerals：
1- support plate devices；2- light-source systems；21- coaxial light sources；22- sides light source；3- imageing sensors；4- angular adjustments
Frame；5- diffuser plates；6- half-reflecting half mirrors；7- black background plates；8-PCB plates.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As long as additionally, technical characteristic involved in invention described below different embodiments non-structure each other
Just can be combined with each other into conflict.
Embodiment 1
The present embodiment provides a kind of pcb board detection means, including：Support plate device 1, for carrying pcb board 8, support plate device 1 will be right
Pcb board carries out the transmission of horizontal direction；Light-source system 2, to irradiate the pcb board 8；Imageing sensor 3, is shone for obtaining
The image information of the pcb board 8 penetrated；Controller, is connected with CCD, and the colourity of light source and bright is adjusted to control light-source system 2
Degree；The light-source system 2 includes：Bulb group, at least one group, the bulb group have color for red, green, blue, white four
Bulb, by opening one or more described bulbs, to synthesize the light of different colourities.
Bulb group is constituted using four colored lights bubble, and from for optical angle, red, green, blue, Bai Si kinds color can be combined and come from
So the various light on boundary, such as red to produce yellow with green superposition, and red superposition with blueness can produce pink, etc..Than
Such as when needing to detect pcb board using red light, need to open red bulb, the bulb of other three kinds of colors is closed；
When needing to detect pcb board using sodium yellow, red and starboard sidelight: green bulb is opened, allow the light of two kinds of colors to produce after being superimposed
SHENGHUANG coloured light, is then irradiated to pcb board 8.
Light-source system of the prior art 2, can only produce the light of single colourity, after different classes of pcb board is changed,
New light source, complex operation and consuming time are dismantled and installed to needs.
And the bulb group that the present embodiment is provided, four kinds of primary colours bulbs are integrated with, by the combination of four kinds of primary colours bulbs, can be with
The light of the different colourities corresponding from various pcb boards is produced in single bulb group, so as to solve prior art well
Present in problem.
Specifically, four kinds of primary colours bulbs are that one group of square arrangement is installed, while the light-source system 2 includes axis light
Source 21 and side light source 22, the coaxial light source 21 is arranged with the half-reflecting half mirror 6 in same horizontal line, the side light source
Arrange in different angles between 22 and the support plate device 1.
In the present embodiment, described pcb board detection means also includes angular adjustment frame 4, including several be connected with each other and
Horizontal by the adjustable plate of different angle, the bulb group is installed on the adjustable plate.The bulb mounting group of angular adjustment frame 4
Side light source 22 is formed afterwards.
To different types of defect on pcb board, some need adopt light perpendicular with defect, some need using with
Defect light in a certain angle is detected, by angular adjustment frame 4, can generate the light in different angles from defect,
Improve the power of test of whole detection means.
Meanwhile, the described pcb board detection means that the present embodiment is provided also includes：Some D/A converters, respectively with it is described
The bulb electrical connection of each color in bulb group, can receive the signal of the controller to control the opening and closing of bulb, and can
By adjusting the size for flowing through lamp current under the control of the controller to change the brightness of bulb.
By controlling the opening and closing of bulb so as to the colourity of quick control light source, meanwhile, controller provides visualization interface, leads to
Cross the current value size that the input current value of setting D/A converter can control to enter in bulb, the electric current that D/A converter will be input into
Value exports continuous current signal through digital-to-analogue conversion, and the bulb of four kinds of colors is controlled by independent D/A converter, so as to control
The brightness of bulb processed and the opening and closing situation of bulb.
In the present embodiment, described pcb board detection means also includes diffuser plate 5, is arranged on the incident illumination of the bulb group
On the path of line, for the incident ray of the bulb group fully to be scattered to into pcb board 8.
In the present embodiment, described pcb board detection means also includes：Half-reflecting half mirror 6, sends out to receive the bulb group
The incident ray penetrated, obtains the reflection light of vertical direction, and the reflection light of vertical direction is on pcb board surface reflection tailing edge original road
Footpath is entered in the CCD of the top of the half-reflecting half mirror 6 by the half-reflecting half mirror 6.
Because light-source system 2 is in the oblique upper of pcb board 8, and CCD is arranged on the surface of pcb board 8, therefore anti-by half
Pellicle mirror 6, can be transformed into the light of vertical direction hence into in CCD by the incident ray of horizontal level.If directly
Using not have transmission function reflecting mirror, then the reflection light of pcb board 8 will be unable to penetrate reflecting mirror, hinder reflection light
Into in CCD.Specifically, the light launched up from pcb board a, semi-gloss is entered in CCD directly through minute surface, and this part is to use
Come what is be imaged, another semi-gloss, transmitting returns to light source direction.
In the present embodiment, described pcb board detection means also includes：Black background plate 7, to absorb the incident ray
The light transmitted after the half-reflecting half mirror 6, prevents the light for passing through from impacting into 3 pairs of detections of imageing sensor.
Specifically, as shown in figure 1, the on-axis rays positioned at the side of half-reflecting half mirror 6 are initially entered in half-reflecting half mirror 6,
A part of light is reflexed on pcb board 8, and a part of light is entered in black background plate 7 through half-reflecting half mirror 6.
In the present embodiment, as shown in figure 1,4 points of the light-source system 2, described image sensor 3 and the angular adjustment frame
Not Wei two groups, and each support plate device 1 setting symmetrical above and below relatively.
Symmetrically arranged light-source system 2 and imageing sensor 3 can be used to recognize the defect of the class of hole one on PCB, using position
It is another positioned at pcb board 8 if there is hole on pcb board 8 when light-source system 2 in the side of pcb board 8 is irradiated to pcb board 8
The imageing sensor 3 of side can detect the light passed through from hole, so as to complete the detection of device to hole.
Embodiment 2
The present embodiment provides a kind of pcb board detection method, comprises the steps：S1. by one kind of opening different colours
Or various bulbs so that light-source system 2 produces the light source of required colourity；S2. the luminous flux of the light source to producing in step S1 enters
Row is adjusted, and makes the luminous flux of light source position consistent；S3. using the light source irradiation pcb board after adjusting；S4. pcb board is obtained
Image information；S5. the color distinction in the reflected light of pcb board zones of different is analyzed, defect present in pcb board is determined.
When a certain defect on to pcb board 8 is detected, light-source system 2 is adjusted first, produce corresponding with defect
Colourity light.When being detected to pcb board 8 using monochromatic light, the corresponding bulb in the middle part of pcb board 8 is more, light
By force, the corresponding bulb in both sides position is less, and light is weak, and this can cause the brightness of the middle part of pcb board 8 to be higher than both sides.So
In detection process, if adopting identical standard to the middle part of pcb board 8 and both sides, because the interference of light will be produced
The inaccurate result of life, the defect for for example obtaining in middle part detection is excessively bright caused by light, and is not pcb board 8
What the defect of itself was caused.
Therefore, in step s 2, the luminous flux of the light source to producing in step S1 is adjusted, and makes light source position
Luminous flux is consistent, so as to avoid the detection error produced due to light.
Specifically, comprise the steps in step S2：
A. blank is irradiated using the light source produced in step S1；
B. obtain the image information of irradiated blank using imageing sensor 3 and image is analyzed；
C. controller receives the signal that imageing sensor 3 sends, and the brightness to light source is adjusted.
Using blank through light source, blank object is identical to the reflectance of light component (red, green, blue), thereby, it is ensured that instead
Light is penetrated in blank free of losses, so as to provide basis for detection in step b and step c.
Specifically, in stepb, using the light reception intensity of each position of statistic law analysis of the image, each position is obtained
Light scale parameter, is highly H as shown in Fig. 2 setting picture traverse as W, counts the brightness and normalization of position 1-H each points
Afterwards, that is, the brightness ratio of each position is drawn.The brightness of each position is adjusted according to brightness ratio so that the brightness of each position reaches
To equilibrium.Cross bright region and reduce brightness, the inadequate region of brightness increases brightness.
The present embodiment adopts CCD to believe with the image for obtaining pcb board 8 as imageing sensor 3 in step S4 and S5
Cease and be analyzed.
CCD is a kind of semiconductor device, optical image can be converted into the signal of telecommunication.As modification, other can be adopted
The imageing sensor 3 of type, such as CMOS.
In the present embodiment, in step S3, also include between the light that sends to the light-source system 2 and pcb board 8
The step of angle is adjusted, has good reflective function to make detected part on pcb board 8.Specifically, it is main by changing
Varied angle adjusting bracket 4 completes angular adjustment process to change the angle between light-source system 2 and support plate device 1.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (11)
1. a kind of pcb board detection means, it is characterised in that include：
Support plate device (1), for carrying pcb board (8)；
Light-source system (2), to irradiate the pcb board (8)；
Imageing sensor (3), for obtaining the image information of irradiated pcb board (8)；
Controller, is connected with CCD, and to control light-source system (2) colourity and the brightness of light source are adjusted；
It is characterized in that：The light-source system (2) includes：
Bulb group, at least one group, it is red, green, blue, four white bulbs that the bulb group has color, by opening one
Or multiple bulbs, to synthesize the light of different colourities.
2. pcb board detection means according to claim 1, it is characterised in that also including angular adjustment frame (4), if including
Dry is connected with each other and horizontal by the adjustable plate of different angle, and the bulb group is provided with the adjustable plate.
3. pcb board detection means according to claim 1 and 2, it is characterised in that also include：
Some D/A converters, electrically connect respectively with the bulb of each color in the bulb group, can receive the controller
Signal to control the opening and closing of bulb, and can pass through to adjust under the control of the controller the size that flow through lamp current to change lamp
The brightness of bubble.
4. pcb board detection means according to claim 3, it is characterised in that also including diffuser plate (5), is arranged on described
On the path of the incident ray of bulb group, for the incident ray of the bulb group fully to be scattered to into pcb board (8).
5. pcb board detection means according to claim 4, it is characterised in that also include：Half-reflecting half mirror (6), to connect
By the incident ray that the bulb group is launched, the reflection light of vertical direction is obtained, the reflection light of vertical direction is in pcb board
(8) CCD that surface reflection tailing edge original route is entered above the half-reflecting half mirror (6) by the half-reflecting half mirror (6)
In.
6. pcb board detection means according to claim 5, it is characterised in that also include：Black background plate (7), to inhale
The light that the incident ray is transmitted after the half-reflecting half mirror (6) is received, prevents the light for passing through from entering imageing sensor
(3) detection is impacted.
7. pcb board detection means according to claim 6, it is characterised in that the light-source system (2), described image are passed
Sensor (3) and the angular adjustment frame (4) are respectively two groups, and each relatively described support plate device (1) setting symmetrical above and below.
8. a kind of pcb board detection method, it is characterised in that comprise the steps：
S1. by one or more bulb of opening different colours so that light-source system (2) produces the light source of required colourity；
S2. the luminous flux of the light source to producing in step S1 is adjusted, and makes the luminous flux of light source position consistent；
S3. using light source irradiation pcb board (8) after adjusting；
S4. the image information of pcb board (8) is obtained；
S5. the color distinction in the reflected light of pcb board (8) zones of different is analyzed, defect present in pcb board (8) is determined.
9. pcb board detection method according to claim 8, it is characterised in that comprise the steps in step S2：
A. blank is irradiated using the light source produced in step S1；
B. obtain the image information of irradiated blank using imageing sensor (3) and image is analyzed；
C. controller receives the signal that imageing sensor (3) sends, and the brightness to light source is adjusted.
10. pcb board detection method according to claim 8, it is characterised in that in step S4 and S5, using CCD
As imageing sensor (3) obtaining the image information of pcb board (8) and be analyzed.
11. pcb board detection methods according to claim 8, it is characterised in that in step S3, also include to institute
The step of angle is adjusted between the light and pcb board (8) that light-source system (2) sends is stated, it is to be measured on pcb board (8) to make
Position has good reflective function.
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