CN102338751B - Equipment for detecting circuit board defects based on visual detection method - Google Patents

Equipment for detecting circuit board defects based on visual detection method Download PDF

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Publication number
CN102338751B
CN102338751B CN 201110148287 CN201110148287A CN102338751B CN 102338751 B CN102338751 B CN 102338751B CN 201110148287 CN201110148287 CN 201110148287 CN 201110148287 A CN201110148287 A CN 201110148287A CN 102338751 B CN102338751 B CN 102338751B
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CN
China
Prior art keywords
circuit board
module
detection
travelling belt
double
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CN 201110148287
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Chinese (zh)
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CN102338751A (en
Inventor
夏航
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浙江工业大学
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Publication of CN102338751A publication Critical patent/CN102338751A/en
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Abstract

The invention discloses equipment for detecting circuit board defects based on a visual detection method. The equipment comprises a material loading module, a detection function module, a material discharging module and a control module which is used for controlling a circuit board positioning mechanism to move and performing defect detection and discharge control, wherein the material loading module is connected with an inlet of a feeding conveying belt; the outlet of the feeding conveying belt is connected with the detection function module; the circuit board positioning mechanism is arranged at the outlet of the feeding conveying belt; the detection function module is connected with the material discharging module, and comprises a detection functional module base, a cameral pedestal provided with a charge-coupled device (CCD) camera, an electromagnet baffle plate and a detection conveying belt used for conveying the circuit board to be detected; the detection conveying belt is arranged on the detection function module base; the camera pedestal is positioned above the detection conveying belt; and the electromagnet baffle plate is arranged at the outlet of the detection conveying belt. By the equipment, the accuracy is improved, the detection speed is high, and the working efficiency is high.

Description

Circuit board defect inspection equipment based on visual detection method
Technical field
The present invention relates to circuit board detection device, especially a kind of circuit board defect inspection equipment.
Background technology
The detection of board failure is the main manual detection method that relies in the past, there is easily undetected, the defective such as detection speed is slow, detection time is long, can not meet the needs of production.
Summary of the invention
For the deficiency that accuracy is lower, speed slow, work efficiency is lower that overcomes existing circuit board detecting method, the invention provides and a kind ofly improve that accuracy, detection speed are fast, the circuit board defect inspection equipment based on visual detection method of high efficiency.
The technical solution adopted for the present invention to solve the technical problems is:
a kind of circuit board defect inspection equipment based on visual detection method, described circuit board defect inspection equipment comprises feeding module, the measuring ability module, material discharging module and the control module of moving and carrying out defects detection and discharging control in order to the control circuit board positioning mechanism, described feeding module is connected with the entrance of feeding travelling belt, the outlet of described feeding travelling belt is connected with described measuring ability module, the exit mounting circuit board positioning mechanism of described feeding travelling belt, described measuring ability module is connected mutually with material discharging module, wherein
Described measuring ability module comprises the measuring ability module base, the camera pedestal of ccd video camera is installed, electromagnet baffle plate and in order to carry the detection travelling belt of circuit board to be detected, described detection travelling belt is arranged on described measuring ability module base, described camera pedestal is positioned at above described detection travelling belt, in the exit of described detection travelling belt, described electromagnet baffle plate is installed.
Further, described measuring ability module also comprises spacing adjusting mechanism, a fixed dam and a fender plate, fixed dam and fender plate lay respectively at the both sides of described detection travelling belt, described spacing adjusting mechanism is comprised of an alternating current generator and double-screw bolt, described spacing adjusting mechanism is installed on described measuring ability module base side, the output shaft of described alternating current generator is fixedly connected with described double-screw bolt, described double-screw bolt and described measuring ability module base form screw pair, and described double-screw bolt end is fixedly connected with described fender plate.
Further, described measuring ability module also comprises the secondary light source of taking for auxiliary described ccd video camera, and described secondary light source is installed on described camera pedestal surrounding.
Further again, described feeding module comprises feeding module base, Timing Belt feed mechanism and material loading frame, described material loading frame and Timing Belt feed mechanism are arranged on described feeding module base, described Timing Belt feed mechanism comprises synchronizing wheel, vertical supporting bar, a pair of double-sided synchronous belt, two pairs of bevel gear transmissions and two Driving Stepping Motors, the synchronizing wheel of installation up and down of described vertical supporting bar, described Timing Belt is sleeved on described synchronizing wheel, and described Driving Stepping Motor is connected with described driven by double-sided synchronous belt by described bevel gear transmission.
described feeding module comprises the clamping spacing adjusting mechanism, described clamping spacing adjusting mechanism comprises base for supporting, the adjustable distance objective table, pulley, spacing is adjusted drive motor and double-screw bolt, described base for supporting is installed on described feeding module base, described adjustable distance objective table is arranged on described base for supporting by pulley, the bottom of described adjustable distance objective table coordinates the formation screw pair with described double-screw bolt, described spacing is adjusted the side that drive motor is arranged on described feeding module base, the driving shaft that described spacing is adjusted drive motor is fixedly connected with described double-screw bolt, described adjustable distance objective table is fixedly connected with vertical supporting bar, the bevel gear transmission that is connected with described vertical supporting bar is sleeved on the main shaft of Driving Stepping Motor slidably.
Described material discharging module comprises sorting module base, discharging travelling belt, position transducer, travelling belt push rod, discharge baffle and reverse sync band feed mechanism, described reverse sync band feed mechanism comprises synchronizing wheel, vertical supporting bar, a pair of double-sided synchronous belt, two pairs of bevel gear transmissions and two Driving Stepping Motors, the synchronizing wheel of installation up and down of described vertical supporting bar, described Timing Belt is sleeved on described synchronizing wheel, and described Driving Stepping Motor is connected with described driven by double-sided synchronous belt by described bevel gear transmission; Described position transducer is installed on reverse sync band feed mechanism front end, described travelling belt push rod is installed on described sorting module base, described travelling belt push rod is positioned at the side of described discharging travelling belt, install between described a pair of double-sided synchronous belt and reclaim travelling belt, the release station of the entrance of described recovery travelling belt and described travelling belt push rod joins, and discharge baffle is installed in the outlet of described recovery travelling belt.
Described board positioning means comprises locating device base, positioning baffle and localization handspike, described board positioning means is installed on feeding travelling belt end, described localization handspike with drive the cylinder interlock, described positioning baffle side be equipped be used to judge circuit board to be detected whether with positioning baffle near position transducer.
Described material loading frame comprises material loading frame shell and material loading frame push rod, and both sides, described material loading frame shell inboard are equipped with equally spaced material loading frame bin, and described material loading frame push rod is arranged in material loading frame shell, and described circuit board to be detected is put in respectively on described material loading frame bin.
Technical conceive of the present invention is: realize that based on vision detection technology circuit board defect detects.The mode that Machine Vision Detection is taken a picture by CCD obtains the image of device and PCB, and then processing and the analysis through computing machine relatively judges defective and fault.
Described Timing Belt feed mechanism coordinates the assigned address that circuit board to be detected is transported in the measuring ability module at the uniform velocity, exactly to detect with described circuit board positioning mechanism, described control module according to testing result by material discharging module respectively to the processing of classifying of testing circuit plate: certified products directly are sent to next station of production line, unacceptable product and can't judge that whether qualified circuit board reclaims by a recovery approach respectively.
Its advantage is that detection speed is fast, and programming time is shorter, can be put into the diverse location of production line, is convenient in time find defective and fault, and production, detection are united two into one; And can shorten and find defective and fault-time, detect before being placed on reflow ovens due to this technology, can in time find the PCB defective that caused by a variety of causes, this moment correcting defect cost well below at final test with the cost that carries out after checking, usually reach tens times.
Beneficial effect of the present invention is mainly manifested in: adopt vision detection technology to carry out circuit board defect and detect, easily undetected, the defective such as detection speed is slow, detection time is long that has overcome that the manual detection method exists, the automatic defect of having realized circuit board detects, and has improved production efficiency.Simultaneously, feeding device is adjustable, the measuring ability device is adjustable, make this complete equipment aborning adaptive faculty greatly improve.The modular design concept of using is divided into a plurality of modules by Function Classification with system, has facilitated device fabrication, assembling, collocation, adjustment.
Description of drawings
Fig. 1 is the whole assembling of circuit board defect detection system design sketch.
Fig. 2 is the fully loaded PCB state design sketch of material loading frame.
Fig. 3 is feeding module assembling design sketch.
Fig. 4 is locating device course of work design sketch.
Fig. 5 is measuring ability module design sketch.
Fig. 6 is arrange position and coverage figure of ccd video camera.
Fig. 7 is the material discharging module design sketch.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
With reference to Fig. 1~Fig. 7, a kind of circuit board defect inspection equipment, comprise feeding module 1, measuring ability module 2, material discharging module 3 and control module 4, described feeding module is connected mutually with travelling belt 5, feeding travelling belt 5 is connected with measuring ability module 2 mutually by circuit board positioning mechanism 7, described measuring ability module is connected with material discharging module 3 mutually by discharging travelling belt 6, and described control module is controlled the work of all described modules.
With reference to Fig. 2, described material loading frame 11 full loads are comprised of material loading frame shell 8, material loading frame push rod 9, circuit board to be detected 10, the inboard both sides of described material loading frame shell are equipped with corresponding equally spaced bin, described material loading frame push rod is a work type rod member, and described circuit board to be detected is put in respectively on described material loading frame bin.
With reference to Fig. 3, described feeding module is comprised of material loading frame 11, Timing Belt feed mechanism 12, feeding module base 17.
Described material loading frame 11 and Timing Belt feed mechanism 12 are arranged on described feeding module base 17, described Timing Belt feed mechanism comprises synchronizing wheel, vertical supporting bar, a pair of double-sided synchronous belt, two pairs of bevel gear transmissions 13 and two Driving Stepping Motors, the synchronizing wheel of installation up and down of described vertical supporting bar, described Timing Belt is sleeved on described synchronizing wheel, and described Driving Stepping Motor is connected with described driven by double-sided synchronous belt by described bevel gear transmission 13.
described clamping spacing adjusting mechanism comprises base for supporting, adjustable distance objective table 14, pulley, spacing is adjusted drive motor 15 and double-screw bolt, described base for supporting is installed on described feeding module base, described adjustable distance objective table is arranged on described base for supporting by pulley, the bottom of described adjustable distance objective table coordinates the formation screw pair with described double-screw bolt, described spacing is adjusted the side that drive motor is arranged on described feeding module base, the driving shaft that described spacing is adjusted drive motor is fixedly connected with described double-screw bolt, described adjustable distance objective table is fixedly connected with vertical supporting bar, the bevel gear transmission 13 that is connected with described vertical supporting bar is sleeved on the main shaft of Driving Stepping Motor slidably.
Timing Belt in described Timing Belt feed mechanism adopts double-sided synchronous belt, and adjacent raised line spacing equates with the spacing of adjacent bin in described material loading frame 11.Described gear train is comprised of two stepper motors, a transmission shaft, two groups of same model bevel gears, realizes a pair of Timing Belt constant speed drive in described Timing Belt feed mechanism.Described adjustable distance objective table contacts with described feeding module base by pulley, and coordinates the formation screw pair with described accent spacing double-screw bolt.Described drive motor is fixed in described feeding module base one side, driving shaft is fixed by flat key with transferring the spacing double-screw bolt, described adjustable distance objective table 15 is fixedly connected with vertical supporting bar, and the bevel gear transmission that is connected with described vertical supporting bar is sleeved on the main shaft of Driving Stepping Motor slidably.
With reference to Fig. 4, described locating device 7 is comprised of locating device base 18, positioning baffle 19, push rod 20, and described locating device is installed on travelling belt 5 ends, and is connected mutually with measuring ability module 2.Described push rod 20 is T-shaped push rod, by air cylinder driven.Described positioning baffle side is equipped with position transducer, be used for judging circuit board to be detected whether with positioning baffle near.
With reference to Fig. 5,6, described measuring ability module 2 is comprised of the shooting frame 21 that ccd video camera is housed, fixed dam 22, detection travelling belt 23, electromagnet baffle plate 24, double-screw bolt 25, drive motor 26, fender plate 27, measuring ability module base 28.In described ccd video camera shooting frame, two shooting frame spacings that are used for the installation ccd video camera are certain, take the maximum effectively coverage of every camera as 210mm * 300mm, institute's testing circuit plate plate Outside Dimensions scope as 240 * 330mm-500 * 600mm as example, described shooting adds 5 ccd video cameras is installed, described 5 concrete installation sites of video camera and coverage are as shown in Figure 6, A in figure~E point represents respectively the ccd video camera installation site, and each profile line zone is respectively the effective shooting area of corresponding ccd video camera.Described fixed dam 22 is installed on described measuring ability module base, is used for treating testing circuit plate one lateral confinement position.Described travelling belt 23 is installed on described measuring ability module base, is used to circuit board to be detected that onward impulse is provided.Described electromagnet baffle plate 24 is installed on measuring ability module base the place ahead, is used for treating testing circuit plate the place ahead and carries out spacing or let pass.Described double-screw bolt 25 and measuring ability module base form screw pair, described double-screw bolt is connected by flat key with described drive motor 26, described double-screw bolt end is connected with described fender plate 27 by rivet, and it is spacing that described double-screw bolt 25, drive motor 26, fender plate 27 are completed circuit board opposite side to be detected jointly.
With reference to Fig. 7, described material discharging module 3 is comprised of travelling belt 6, position transducer, push rod 30, baffle plate 31, discharging recovery frame pull bar 32, discharging recovery frame 33, reverse sync band feed mechanism 34, travelling belt 35, deflector apron 36, the reverse gathering-device base 37 of discharging circuit board, material discharging module base 38, control module 4.Described travelling belt 6 is installed on described discharging base, and an end is connected with the measuring ability module, and the other end is connected with next station of board production streamline.Described position transducer is installed on reverse sync band feed mechanism 34 front ends, for positioning action is played in push rod 30 work.Described push rod 30 is controlled by cylinder, is installed on the material discharging module base.Described baffle plate 31, reverse sync band feed mechanism 34, travelling belt 35, deflector apron 36 are installed on the reverse gathering-device base 37 of described discharging circuit board, and principle of work and Timing Belt feed mechanism are similar.Described discharging is reclaimed frame pull bar 32 and is installed on discharging and reclaims frame 33 upper ends.
the course of work of the present embodiment is: at first described circuit board to be detected is pushed into described Timing Belt feed mechanism by fully loaded described material loading frame, be transported in a stepwise manner described main belt by described Timing Belt feed mechanism again, the described locating device of installing at described main belt end is sent to described vision inspection apparatus assigned address with described circuit board to be detected, then by described vision inspection apparatus, described circuit board is detected, last described material discharging module according to testing result to the processing of classifying of described circuit board, if described circuit board detecting is qualified, be transported to smoothly next station by described secondary travelling belt, if described circuit board detecting is defective, described position transducer is passed to described control module with signal when this circuit board arrives assigned address, and make No. 2 cylinders accept instruction, described circuit board is pushed defective circuit board treatment channel, and finally be collected into described defective circuit board by the reverse gathering-device of described discharging circuit board and process the storehouse, if None-identified, described position transducer is passed to described control module with signal when this circuit board arrives assigned address, and make No. 3 cylinders accept instruction, described circuit board is pushed None-identified circuit board treatment channel, and the reverse gathering-device of final described discharging circuit board is collected into None-identified and processes the storehouse.Behind the certain hour interval, the relevant staff will process the storehouse classification to two and process: described defective circuit board is processed the storehouse and directly is transported to maintenance area by fork truck and keeps in repair, and then returns to measuring point to be checked and again detects; Described None-identified circuit board is processed the storehouse and is transported to the manual detection zone by fork truck, collectedly carefully detected by the manual detection mode by the coherent detection personnel, if zero defect directly is transported to next station, carry out corresponding repairing if exist defective to be transported to maintenance area, then return to measuring point to be checked and again detect.

Claims (6)

1. circuit board defect inspection equipment based on visual detection method, it is characterized in that: described circuit board defect inspection equipment comprises feeding module, the measuring ability module, material discharging module and the control module of moving and carrying out defects detection and discharging control in order to the control circuit board positioning mechanism, described feeding module is connected with the entrance of feeding travelling belt, the outlet of described feeding travelling belt is connected with described measuring ability module, the exit mounting circuit board positioning mechanism of described feeding travelling belt, described measuring ability module is connected mutually with material discharging module, wherein
Described measuring ability module comprises the measuring ability module base, the camera pedestal of ccd video camera is installed, electromagnet baffle plate and in order to carry the detection travelling belt of circuit board to be detected, described detection travelling belt is arranged on described measuring ability module base, described camera pedestal is positioned at above described detection travelling belt, in the exit of described detection travelling belt, described electromagnet baffle plate is installed;
Described feeding module comprises feeding module base, Timing Belt feed mechanism and material loading frame, described material loading frame and Timing Belt feed mechanism are arranged on described feeding module base, described Timing Belt feed mechanism comprises synchronizing wheel, vertical supporting bar, a pair of double-sided synchronous belt, two pairs of bevel gear transmissions and two Driving Stepping Motors, the synchronizing wheel of installation up and down of described vertical supporting bar, described Timing Belt is sleeved on described synchronizing wheel, and described Driving Stepping Motor is connected with described driven by double-sided synchronous belt by described bevel gear transmission;
described feeding module comprises the clamping spacing adjusting mechanism, described clamping spacing adjusting mechanism comprises base for supporting, the adjustable distance objective table, pulley, spacing is adjusted drive motor and double-screw bolt, described base for supporting is installed on described feeding module base, described adjustable distance objective table is arranged on described base for supporting by pulley, the bottom of described adjustable distance objective table coordinates the formation screw pair with described double-screw bolt, described spacing is adjusted the side that drive motor is arranged on described feeding module base, the driving shaft that described spacing is adjusted drive motor is fixedly connected with described double-screw bolt, described adjustable distance objective table is fixedly connected with vertical supporting bar, the bevel gear transmission that is connected with described vertical supporting bar is sleeved on the main shaft of Driving Stepping Motor slidably.
2. the circuit board defect inspection equipment based on visual detection method as claimed in claim 1, it is characterized in that: described measuring ability module also comprises spacing adjusting mechanism, a fixed dam and a fender plate, fixed dam and fender plate lay respectively at the both sides of described detection travelling belt, described spacing adjusting mechanism is comprised of an alternating current generator and double-screw bolt, described spacing adjusting mechanism is installed on described measuring ability module base side, the output shaft of described alternating current generator is fixedly connected with described double-screw bolt, described double-screw bolt and described measuring ability module base form screw pair, described double-screw bolt end is fixedly connected with described fender plate.
3. the circuit board defect inspection equipment based on visual detection method as claimed in claim 2, it is characterized in that: described measuring ability module also comprises the secondary light source of taking for auxiliary described ccd video camera, and described secondary light source is installed on described camera pedestal surrounding.
4. the circuit board defect inspection equipment based on visual detection method as described in one of claim 1 ~ 3, it is characterized in that: described material discharging module comprises the sorting module base, the discharging travelling belt, position transducer, the travelling belt push rod, discharge baffle and reverse sync band feed mechanism, described reverse sync band feed mechanism comprises synchronizing wheel, vertical supporting bar, a pair of double-sided synchronous belt, two pairs of bevel gear transmissions and two Driving Stepping Motors, the synchronizing wheel of installation up and down of described vertical supporting bar, described Timing Belt is sleeved on described synchronizing wheel, described Driving Stepping Motor is connected with described driven by double-sided synchronous belt by described bevel gear transmission, described position transducer is installed on reverse sync band feed mechanism front end, described travelling belt push rod is installed on described sorting module base, described travelling belt push rod is positioned at the side of described discharging travelling belt, install between described a pair of double-sided synchronous belt and reclaim travelling belt, the release station of the entrance of described recovery travelling belt and described travelling belt push rod joins, and discharge baffle is installed in the outlet of described recovery travelling belt.
5. the circuit board defect inspection equipment based on visual detection method as described in one of claim 1 ~ 3, it is characterized in that: described circuit board positioning mechanism comprises locating device base, positioning baffle and localization handspike, described circuit board positioning mechanism is installed on feeding travelling belt end, described localization handspike with drive the cylinder interlock, described positioning baffle side be equipped be used to judge circuit board to be detected whether with positioning baffle near position transducer.
6. the circuit board defect inspection equipment based on visual detection method as claimed in claim 1, it is characterized in that: described material loading frame comprises material loading frame shell and material loading frame push rod, the inboard both sides of described material loading frame shell are equipped with equally spaced material loading frame bin, described material loading frame push rod is arranged in material loading frame shell, and described circuit board to be detected is put in respectively on described material loading frame bin.
CN 201110148287 2011-06-02 2011-06-02 Equipment for detecting circuit board defects based on visual detection method CN102338751B (en)

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