CN115739690B - LED patch detection equipment and detection method - Google Patents
LED patch detection equipment and detection method Download PDFInfo
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- CN115739690B CN115739690B CN202211482756.5A CN202211482756A CN115739690B CN 115739690 B CN115739690 B CN 115739690B CN 202211482756 A CN202211482756 A CN 202211482756A CN 115739690 B CN115739690 B CN 115739690B
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- 238000001514 detection method Methods 0.000 title claims abstract description 136
- 230000007246 mechanism Effects 0.000 claims abstract description 87
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- 238000001179 sorption measurement Methods 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 39
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Abstract
The invention discloses LED patch detection equipment and a detection method, wherein the detection equipment comprises a frame, a seat table and a detection unit, the detection unit comprises a loading mechanism, a feeding group, a discharging group, a CCD detection group and a disqualification transferring group, the CCD detection group is provided with a CCD image sensing module and a pressure sensor module, the CCD image sensing module is provided with a front projection image taking module and a side projection image taking module, the front projection image taking module and the side projection image taking module respectively take images and transmit the images to a processing center, the processing center analyzes the taken images and judges qualified products and disqualified products, the disqualification products give coordinate values, and the disqualification products take out of disqualification products on a test disc through a disqualification product taking manipulator. The LED patch detection device is full-automatic detection device, can automatically feed and automatically detect, can separate qualified products and unqualified products after detection, and improves detection efficiency.
Description
Technical Field
The invention relates to LED patch detection equipment, in particular to LED patch detection equipment and a detection method.
Background
In the field of manufacturing LED chips, it is necessary to perform mass production inspection of the manufactured LED chips to detect electrical properties, functional parameters, appearance, and the like of the LED chips.
For the LED patch, besides the performance, the luminous performance of the LED patch is required to be detected, so that the LED patch can be confirmed to normally emit light, and the delivery quality is ensured.
The following are defects of the existing LED patch detection technology:
1. in the traditional technology, the LED patch is generally subjected to luminous performance detection through manual work, an operator can observe the LED patch by naked eyes to confirm that the LED patch can normally generate lamplight, however, fatigue is easy to generate when the LED lamplight is observed by naked eyes, and the LED lamplight can cause damage to eyesight for a long time, so that the LED patch is not beneficial to high-efficiency detection of the LED patch and the health of the operator is guaranteed.
2. When detecting the LED paster outward appearance, need detect the height, the week size of LED paster, if the height of LED paster is different with the height of settlement, then influence the light-emitting effect of LED paster, if the girth of LED paster is different with the settlement, then influence the luminous scope of LED paster, confirm the height of LED paster, week size and hardly distinguish through the naked eye.
Therefore, it is necessary to develop an LED patch detection apparatus to solve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the LED patch detection equipment and the detection method, which are designed to improve the detection efficiency and solve the problems of the detection of the height of the LED patch and the detection of the circumference of the LED patch which cannot be finished by manual detection.
In order to solve the technical problems, the invention is realized by the following scheme: the invention relates to LED patch detection equipment, which comprises a rack, a seat table arranged on the rack and a detection unit arranged on the seat table, wherein the detection unit comprises:
the material loading mechanism is provided with a first Y-axis moving module and a detection platform group which is in driving connection with the first Y-axis moving module and is driven by the first Y-axis moving module to do Y-axis movement, the detection platform group is provided with a lifting mechanism and a detection platform which is in driving connection with the lifting mechanism, and the detection platform is provided with an array circuit module for supplying power to and detecting each LED patch;
the feeding group is provided with a feeding mechanism and a first X-axis moving module for driving the feeding mechanism to reciprocate between a feeding platform and a detection platform, the first X-axis moving module is provided with a first vacuum negative pressure system, and the first vacuum negative pressure system is used for sucking a test disc on the feeding platform through vacuumizing to form negative pressure and sending the test disc to the detection platform;
the unloading group is provided with an unloading mechanism and a second X-axis moving module for driving the unloading mechanism to reciprocate between the detection platform and the discharging platform, the second X-axis moving module is provided with a second vacuum negative pressure system, the second vacuum negative pressure system is used for sucking and conveying the test disc on the detection platform to the discharging platform through vacuumizing to form negative pressure, and the unloading group is also provided with a defective product taking manipulator;
The CCD detection group is provided with a portal frame arranged on the seat table, a third X-axis moving module arranged on the portal frame, a CCD image sensing module and a pressure sensor module, wherein the CCD image sensing module is in driving connection with the third X-axis moving module, the shot image range of the CCD image sensing module covers the detection platform, the CCD image sensing module is provided with two groups of CCD image sensors and two groups of light sources, one group of CCD image sensors and one group of light sources form a front projection image taking module, the other group of CCD image sensors and the other group of light sources form a side projection image taking module, images are respectively taken through the front projection image taking module and the side projection image taking module and are transmitted to a processing center, the shot images are analyzed and judged through the processing center, the unqualified products give out coordinate values, the unqualified products on the detection platform are taken out through the unqualified product taking manipulator, and the pressure sensor module can apply pressure to the detection platform;
the unqualified transfer group is arranged on the seat, and is provided with a second Y-axis moving module and an unqualified product receiving tray which is driven by the second Y-axis moving module to move in the Y-axis direction, and the second Y-axis moving module can drive the unqualified product receiving tray to be received below the unqualified product taking manipulator.
Further, in the loading mechanism, the first Y-axis moving module includes:
the first Y-axis motor is fixed on the seat table through a first motor seat, and two parallel first Y-axis guide rail seats are also arranged on the seat table;
the two first Y-axis guide rails are respectively arranged on the two first Y-axis guide rail seats;
the first screw rod is positioned between the two first Y-axis guide rail seats and is in driving connection with the first Y-axis motor, and the outer end of the first screw rod is fixed on the seat table through the first screw rod seat;
the first sliding seat is slidably connected to the two first Y-axis guide rail seats and is in threaded connection with the first screw rod, and the first sliding seat is driven by the rotation of the first screw rod to move in the Y-axis direction.
Further, the power source of the lifting mechanism is a first voice coil motor, the first voice coil motor is fixed on the first sliding seat through a voice coil motor seat, and the driving end of the first voice coil motor is connected with the platform seat.
Further, the table top of the detection platform is divided into matrix groove surfaces, each groove surface is provided with an elastic detection needle, and the bottom surface of the test disc is provided with a contact terminal correspondingly matched with the elastic detection needle.
Further, the first X-axis moving module drives the feeding mechanism to move in the X-axis direction through the first belt group.
Further, the second X-axis moving module drives the discharging mechanism to move in the X-axis direction through the second belt group.
Further, the feeding mechanism includes:
the first supporting seat is fixed on the first X-axis moving module through a first vertical bracket;
the first Z-axis motor is arranged on one side of the first supporting seat in the Z-axis direction and is in driving connection with the first Z-axis sliding plate, and the first Z-axis motor drives the first Z-axis sliding plate to lift;
the second voice coil motor base is arranged on the first Z-axis sliding plate;
the second voice coil motor is arranged on the second voice coil motor seat;
the material taking connecting seat is in driving connection with the second voice coil motor and is driven by the second voice coil motor to do lifting movement, and the lower end of the material taking connecting seat is connected with a first vacuum adsorption plate;
the first pressure sensor module is arranged on the material taking connecting seat and senses the pressure born by the material taking connecting seat.
Further, the unloading mechanism comprises:
the second supporting seat is fixed on the second X-axis moving module through a second vertical bracket;
the second Z-axis motor is arranged on one side of the second supporting seat in the Z-axis direction and is in driving connection with a second Z-axis sliding plate, and the second Z-axis motor drives the second Z-axis sliding plate to lift;
The third voice coil motor base is arranged on the second Z-axis sliding plate;
the third voice coil motor is arranged on the third voice coil motor seat;
the discharging connecting seat is in driving connection with the third voice coil motor and is driven by the third voice coil motor to do lifting motion, the lower end of the discharging connecting seat is connected with a second vacuum adsorption plate, and the second vacuum adsorption plate is provided with an avoidance hole for the passing of the unqualified product taking manipulator;
and the second pressure sensor module is arranged on the unloading connecting seat and senses the pressure born by the unloading connecting seat.
Still further, the reject reclaiming robot includes:
the fixing plate is horizontally arranged on the second supporting seat and is provided with a through hole;
the material taking motor is arranged on the fixed plate and is in driving connection with a gear;
the support roller is fixed on the plate surface of the fixed plate through a support, the rolling surface of the support roller is opposite to the wheel surface of the gear, and a gap is reserved between the support roller and the gear;
the rack is penetrated in the gap, the tooth trace side of the rack is connected with the gear in a meshed manner, and the opposite side of the tooth trace is abutted with the rolling surface of the supporting roller;
The negative pressure device is arranged at the lower end of the rack and is connected with a downward suction nozzle, and the lifting path of the suction nozzle can pass through the avoidance hole.
Further, the third X-axis moving module comprises an X-axis template arranged on one side of the portal frame beam, a double-row X-axis guide rail arranged on the X-axis template, an X-axis stepping motor arranged on the X-axis template, a second screw rod in driving connection with the X-axis stepping motor, and an X-axis moving slide plate in sliding connection with the double-row X-axis guide rail and in threaded connection with the second screw rod.
Still further, the orthographic projection image capturing module comprises:
the first CCD image sensor is installed on the upper side of the vertical center line of the X-axis movable sliding plate through a height-adjustable seat;
the first light source is arranged at the lower side of the vertical central line of the X-axis movable sliding plate and is provided with a through hole for the first CCD image sensor to avoid the first CCD image sensor lens;
the side projection image capturing module comprises:
the second CCD image sensor is arranged on the right side of the vertical center line position of the X-axis moving slide plate and is lower than the first CCD image sensor through a second height adjusting seat;
And the second light source is arranged on the left side of the vertical center line of the X-axis movable sliding plate.
Still further, the pressure sensor module is installed on a cover body, and this cover body cover in on the X axle removes the slide and with orthographic projection gets the image module, the side projection gets the image module cover, this cover body lower extreme opening, the pressure sensor module includes:
the linear cylinder seat is arranged on the front side surface of the cover body;
the linear cylinder is arranged on the linear cylinder seat;
the L-shaped bracket is in driving connection with the linear cylinder;
the pressure sensor is arranged on the L-shaped bracket and has a downward sensing head;
the guide post is arranged on the L-shaped bracket and penetrates through the linear cylinder seat.
Further, in the disqualified transfer group, the second Y-axis moving module comprises a -type bracket installed on the seat table, a double-row Y-axis guide rail installed on the -type bracket, a second Y-axis motor installed on the -type bracket, a second belt group in driving connection with the second Y-axis motor, and a second sliding seat in sliding connection with the double-row Y-axis guide rail, wherein the second sliding seat is also fixed with an uplink belt of the second belt group;
The lower disc surface of the reject receiving disc is fixed with the second sliding seat and is also supported by two groups of roller brackets;
the roller support comprises a support plate laterally arranged on the support and rollers rotatably arranged on the support plate, and the lower disc surface of the unqualified product receiving disc is arranged on the two rollers.
The detection method of the LED patch detection device comprises the following detection steps:
step one, a test disc filled with LED patches is fed into a feeding platform by an external automatic feeding vehicle, the feeding platform is provided with a positioning structure to accurately position the test disc, and a first X-axis moving module drives the feeding mechanism to reach the upper part of the test disc;
step two, a first Z-axis motor on the feeding mechanism drives a second voice coil motor to reach a preset height, the second voice coil motor drives a first vacuum adsorption plate to descend, an adsorption head on the first voice coil motor is tightly attached to the edge of the test disc, a first pressure sensor module senses pressure, and after the pressure reaches a preset value, the second voice coil motor stops working and starts a first vacuum negative pressure system to enable the first vacuum adsorption plate to tightly adsorb the test disc;
step three, a second voice coil motor drives a first vacuum adsorption plate to ascend, a first X-axis moving module drives a feeding mechanism to reach the upper part of a detection platform, a first Z-axis motor drives a second voice coil motor to descend and reach a preset height, the second voice coil motor drives the first vacuum adsorption plate to descend so that a test disc is arranged on the detection platform, meanwhile, a first pressure sensor module senses pressure, when the pressure reaches a preset value, the second voice coil motor stops working, and the first vacuum adsorption plate keeps pressure;
Step four, in the step three, the second voice coil motor drives the first vacuum adsorption plate to descend, and meanwhile, the linear cylinder drives the pressure sensor to prop against the first vacuum adsorption plate and apply pressure;
step five, the array circuit module on the detection platform is electrified to enable each LED patch to conduct a circuit, when one or more LED patches are not bright, a processing center reads coordinates of the bright LED patches, records all coordinates to form defective product coordinate signals and transmits the defective product coordinate signals to a defective product material taking manipulator, and the defective product material taking manipulator receives all defective product coordinate signals and waits;
step six, after the power-on detection of the LED patch is completed, the array circuit module is powered off, the pressure sensor is driven to ascend by the linear cylinder, the second voice coil motor drives the first vacuum adsorption plate to ascend, the first Z-axis motor drives the second voice coil motor to ascend to a preset height, and the first X-axis moving module resets the feeding mechanism;
step seven, an LED patch array on a test panel is exposed, at the moment, a CCD detection group is started, firstly, a front projection image taking module is powered on to work, the front projection image taking module is enabled to grasp and transmit all images of the test panel to a processing center through the cooperation of a first Y-axis moving module and a third X-axis moving module, the processing center is used for comparing the front projection images of the LED patches with preset front projection images to judge whether the LED patches are positioned correctly, when one or more LED patches in the front projection images and the preset front projection images exceed an error value, the processing center judges that the LED patches corresponding to the error value are unqualified products, and generates unqualified product LED coordinates to be sent to an unqualified product taking manipulator, and the unqualified product taking manipulator receives all unqualified product coordinate signals and continues to wait;
Step eight, after the front projection image capturing module finishes the image capturing work, powering off, starting the side projection image capturing module, and in accordance with the process of the step seven, projecting the LED patches laterally by the side projection image capturing module through a second light source, enabling a shadow area of the LED patches and an LED patch image to be shot together by a second CCD image sensor, transmitting the LED patch image and the shadow area image to a processing center through the second CCD image sensor, judging whether the height of the LED patches meets the requirement by judging the projection length of the shadow area, judging unqualified products by the processing center, recording the coordinates of the unqualified LED patches, and transmitting the unqualified products to a material taking manipulator;
step nine, the side projection image capturing module finishes image capturing and cuts off power supply, the second X-axis moving module drives the discharging mechanism to reach the upper side of the detection platform, the unqualified product taking manipulator accurately finds the coordinate positions of all unqualified LED patches through the second X-axis moving module and the first Y-axis moving module and captures the unqualified LED patches one by one, and the second X-axis moving module drives the discharging mechanism to move the unqualified LED patches one by one to the upper side of the discharging platform;
step ten, the disqualified transfer group synchronously receives coordinate quantity signals of disqualified LED patches, the second Y-axis moving module drives the disqualified product receiving tray to reach the position below the disqualified product taking manipulator, the disqualified product taking manipulator cancels negative pressure to enable the disqualified LED patches to fall into the disqualified product receiving tray, and after all disqualified LED patches are transferred to the disqualified product receiving tray, the disqualified transfer group resets;
Eleventh, the second X-axis moving module drives the discharging mechanism to the detecting platform, the discharging mechanism enables the second vacuum adsorption plate to take out the testing disc with the qualified LED patches, then the discharging mechanism is driven to the discharging platform through the second X-axis moving module, the discharging mechanism cancels negative pressure, and the testing disc with the qualified LED patches is placed on the discharging platform;
and step twelve, the external automatic discharging vehicle takes off and stores the test disc placed on the discharging platform.
Compared with the prior art, the invention has the beneficial effects that:
1. the LED patch detection device is full-automatic detection device, can automatically feed and automatically detect, can separate qualified products and unqualified products after detection, and improves detection efficiency.
2. According to the invention, each LED patch is positioned in a coordinate mode, an array circuit module is arranged on a detection platform (24) for power supply detection of each LED patch, the coordinates of the unlit LED patches are judged through a processing center, so that defective product coordinates are formed by the coordinates, the defective product coordinates are sent to a defective product taking manipulator for taking materials, and the defective LED patches are accurately taken out.
3. The invention adopts two groups of CCD image capturing modules, namely a front projection image capturing module and a side projection image capturing module, the front side of the LED patch is shot through the front projection image capturing module, the formed pattern is compared with the set pattern, the error of the circumference is larger, the failed LED patch is judged to be failed, and a failed coordinate is formed, the failed coordinate is sent to a failed product taking manipulator for taking materials, the failed LED patch is accurately taken out, the length of a shadow area of the LED patch is judged through the side projection image capturing module, if the shadow area is larger than the size of the shadow area of a preset image, the thickness of the LED patch is large, and if the shadow area is shorter than the size of the shadow area of the preset image, the LED patch is thin, therefore, the failed LED patch is judged by a processing center, the failed coordinate is given, the failed coordinate is sent to the failed product taking manipulator for taking materials, and the failed LED patch is accurately taken out.
4. According to the unloading group, two groups of mechanisms are arranged in a mode of avoiding openings, so that the unqualified product taking manipulator does not occupy space.
Drawings
Fig. 1 is a perspective view of an LED patch detection apparatus of the present invention.
Fig. 2 is a perspective view of the LED patch detection apparatus of the present invention after the housing of the apparatus is removed.
Fig. 3 is another perspective view of the LED patch detection apparatus of the present invention with the housing removed.
Fig. 4 is a structural view of the loading mechanism of the present invention.
Fig. 5 is a block diagram of the feed mechanism of the present invention.
Fig. 6 is a block diagram of the discharge mechanism of the present invention.
Fig. 7 is a block diagram of the reject picking robot of the present invention.
Fig. 8 is a structural view of a test disc of the present invention.
FIG. 9 is a block diagram of a CCD detection set according to the present invention.
Fig. 10 is a block diagram of a CCD image sensor module according to the present invention.
Fig. 11 is a block diagram of the reject transfer unit according to the present invention.
Fig. 12 is a structural view of another loading mechanism of the present invention.
The reference numerals in the drawings: the machine frame 1, the detection unit 2, the machine body housing 3, the alarm lamp 4, the exhaust fan 5, the industrial personal computer 6, the silencing device 7, the seat 8, the test tray 9, the first Y-axis moving module 21, the CCD detection unit 22, the feeding mechanism 23, the detection platform 24, the discharging mechanism 25, the discharging platform 26, the reject receiving tray 27, the second Y-axis moving module 28, the second X-axis moving module 29, the first X-axis moving module 210, the feeding platform 211, the first vacuum adsorption plate 212, the second vacuum adsorption plate 213, the first Y-axis guide seat 2101, the first Y-axis guide track 2102, the lifting mechanism 2103, the first Y-axis motor 2104, the first screw 2105, the first support seat 231, the first Z-axis motor 232, the first Z-axis sliding plate 233, the second voice coil motor 234, the second motor seat 235, the material taking connecting seat 236, the first voice coil module 237 and the second support seat 251, the second Z-axis motor 252, the second Z-axis sliding plate 253, the third voice coil motor 254, the third voice coil motor seat 255, the unloading connecting seat 256, the second pressure sensor module 257, the rack 258, the gear 259, the material taking motor 2510, the supporting roller 2511, the negative pressure device 2512, the suction nozzle 2513, the fixed plate 2514, the pressure sensor 222, the double-row X-axis guide rail 225, the X-axis stepping motor 226, the portal frame 227, the second screw 228, the cover 229, the X-axis moving sliding plate 2210, the first CCD image sensor 2211, the second CCD image sensor 2212, the first light source 2213, the second light source 2214, the height adjustable seat 2215, the roller 271, the supporting plate 272, the second Y-axis motor 281, the '' type bracket 282, the double-row Y-axis guide rail 283, the second belt group 284, the second slide 285, the second loading mechanism 10, the platform bracket 101, the adsorption platform 102 and the positioning head 103.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the protection scope of the present invention is more clearly and clearly defined. It should be apparent that the described embodiments of the invention are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1: the specific structure of the invention is as follows:
referring to fig. 1-11, the LED patch detection apparatus of the present invention includes a frame 1, a seat 8 disposed on the frame 1, and a detection unit 2 mounted on the seat 8, where the detection unit 2 includes:
the material loading mechanism is provided with a first Y-axis moving module 21 and a detection platform group which is in driving connection with the first Y-axis moving module 21 and is driven by the first Y-axis moving module 21 to move in the Y-axis direction, the detection platform group is provided with a lifting mechanism 2103 and a detection platform 24 in driving connection with the lifting mechanism 2103, and the detection platform 24 is provided with an array circuit module for power supply detection of each LED patch;
The feeding group is provided with a feeding mechanism 23 and a first X-axis moving module 210 for driving the feeding mechanism 23 to reciprocate between a feeding platform 211 and a detecting platform 24, wherein the first X-axis moving module 210 is provided with a first vacuum negative pressure system, and the first vacuum negative pressure system is used for sucking and conveying the test disc 9 on the feeding platform 211 to the detecting platform 24 through vacuumizing to form negative pressure;
the unloading group is provided with an unloading mechanism 25 and a second X-axis moving module 29 for driving the unloading mechanism 25 to reciprocate between the detection platform 24 and the discharging platform 26, the second X-axis moving module 29 is provided with a second vacuum negative pressure system, the second vacuum negative pressure system is used for sucking and conveying the test disc 9 on the detection platform 24 to the discharging platform 26 through vacuumizing to form negative pressure, and the unloading group is also provided with a reject taking manipulator;
the CCD detection set 22 comprises a portal frame 227 arranged on the seat stand 8, a third X-axis moving module arranged on the portal frame 227, a CCD image sensing module and a pressure sensor module, wherein the CCD image sensing module is in driving connection with the third X-axis moving module, the shot image range of the CCD image sensing module covers the detection platform 24, the CCD image sensing module comprises two groups of CCD image sensors and two groups of light sources, one group of CCD image sensors and one group of light sources form a front projection image taking module, the other group of CCD image sensors and the other group of light sources form a side projection image taking module, images are respectively taken through the front projection image taking module and the side projection image taking module and are transmitted to a processing center, the shot images are analyzed and judged to be qualified and unqualified through the processing center, the unqualified products give coordinate values, the unqualified products on the detection platform 9 are taken out through the unqualified products taking manipulator, and the pressure sensor module can press the detection platform 9 on the detection platform 24;
The disqualified transfer group is mounted on the seat 8 and is provided with a second Y-axis moving module 28 and a disqualified product receiving tray 27 driven by the second Y-axis moving module 28 to move in the Y-axis direction, and the second Y-axis moving module 28 can drive the disqualified product receiving tray 27 to receive materials from the lower part of the disqualified product taking manipulator.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 4, in the loading mechanism, the first Y-axis moving module 21 includes:
the first Y-axis motor 2104 is fixed on the seat 8 through a first motor seat, and two parallel first Y-axis guide rail seats 2101 are also arranged on the seat 8;
two first Y-axis guide rails 2102 mounted on the two first Y-axis guide rail seats 2101, respectively;
the first screw rod 2105 is positioned between the two first Y-axis guide rail seats 2101 and is in driving connection with the first Y-axis motor 2104, and the outer end of the first screw rod 2105 is fixed on the seat table 8 through the first screw rod seats;
the first sliding seat is slidably connected to the two first Y-axis guide rail seats 2101 and is in threaded connection with the first screw rod 2105, and the first sliding seat is driven by the rotation of the first screw rod 2105 to move in the Y-axis direction.
A preferred technical scheme of the embodiment is as follows: the power source of the lifting mechanism 2103 is a first voice coil motor, the first voice coil motor is fixed on the first sliding seat through a voice coil motor seat, and the driving end of the first voice coil motor is connected with a platform seat.
A preferred technical scheme of the embodiment is as follows: the table surface of the detection platform 24 is divided into matrix groove surfaces, each groove surface is provided with an elastic detection needle, and the bottom surface of the test disc 9 is provided with a contact terminal correspondingly matched with the elastic detection needle.
A preferred technical scheme of the embodiment is as follows: the first X-axis moving module 210 drives the feeding mechanism 23 to move along the X-axis through the first belt set.
A preferred technical scheme of the embodiment is as follows: the second X-axis moving module 29 drives the discharging mechanism 25 to move in the X-axis direction through a second belt set.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 5, the feeding mechanism 23 includes:
the first supporting seat 231 is fixed on the first X-axis moving module 210 through a first vertical bracket;
a first Z-axis motor 232 installed on one side of the first support seat 231 in the Z-axis direction, and in driving connection with the first Z-axis sliding plate 233, wherein the first Z-axis motor 232 drives the first Z-axis sliding plate 233 to lift;
a second voice coil motor mount 235 mounted on the first Z-axis sled 233;
a second voice coil motor 234 mounted on the second voice coil motor mount 235;
a material taking connecting seat 236 in driving connection with the second voice coil motor 234 and driven by the second voice coil motor 234 to do lifting motion, wherein the lower end of the material taking connecting seat 236 is connected with a first vacuum adsorption plate 212;
The first pressure sensor module 237 is installed on the material taking connecting seat 236 and senses the pressure applied to the material taking connecting seat 236.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 6, the discharging mechanism 25 includes:
the second support seat 251 is fixed on the second X-axis moving module 29 through a second vertical bracket;
the second Z-axis motor 252 is installed on one side of the second support seat 251 in the Z-axis direction, and is in driving connection with the second Z-axis sliding plate 253, and the second Z-axis motor 252 drives the second Z-axis sliding plate 253 to lift;
a third voice coil motor mount 255 mounted on the second Z-axis sled 253;
a third voice coil motor 254 mounted on the third voice coil motor mount 255;
the unloading connecting seat 256 is in driving connection with the third voice coil motor 254 and is driven by the third voice coil motor 254 to do lifting motion, the lower end of the unloading connecting seat 256 is connected with a second vacuum adsorption plate 213, and the second vacuum adsorption plate 213 is provided with an avoidance hole for the passing of the unqualified product taking manipulator;
the second pressure sensor module 257 is mounted on the discharge connection seat 256 and senses the pressure applied to the discharge connection seat 256.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 7, the reject reclaiming robot includes:
a fixing plate 2514 horizontally installed on the second support base 251, the fixing plate 2514 having a through hole;
a material taking motor 2510 mounted on the fixing plate, wherein the material taking motor 2510 is in driving connection with a gear 259;
a support roller 2511 fixed to a plate surface of the fixing plate 2514 through a bracket, wherein a rolling surface of the support roller 2511 is opposite to a wheel surface of the gear 259, and a gap is left between the support roller 2511 and the gear 259;
a rack 258 penetrating the gap, wherein the toothed side of the rack is engaged with the gear 259, and the opposite side of the toothed is in contact with the rolling surface of the support roller 2511;
a negative pressure device 2512 is mounted at the lower end of the rack 258, a downward suction nozzle 2513 is connected to the negative pressure device 2512, and the lifting path of the suction nozzle 2513 can pass through the avoidance hole.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 9-10, the third X-axis moving module comprises an X-axis template mounted on one side of a beam of the gantry 227, a double-row X-axis guide rail 225 mounted on the X-axis template, an X-axis stepping motor 226 mounted on the X-axis template, a second screw 228 in driving connection with the X-axis stepping motor 226, and an X-axis moving slide 2210 slidably connected with the double-row X-axis guide rail 225 and in screw connection with the second screw 228.
A preferred technical scheme of the embodiment is as follows: the orthographic projection image capturing module comprises:
a first CCD image sensor 2211 with a downward-facing lens, wherein the first CCD image sensor 2211 is installed on the upper side of the vertical center line position of the X-axis moving slide plate 2210 through a height adjustable seat 2215;
a first light source 2213 mounted on the lower side of the vertical center line of the X-axis moving slide plate 2210, wherein the first light source 2213 has a through hole for the first CCD image sensor 2211 to avoid the lens of the first CCD image sensor 2211;
the side projection image capturing module comprises:
a second CCD image sensor 2212 with a downward installed lens, the second CCD image sensor 2212 being installed at a right side of a vertical center line position of the X-axis moving slide plate 2210 and at a position lower than the first CCD image sensor 2211 through a second height adjusting seat;
a second light source 2214 mounted to the left of the vertical center line position of the X-axis moving slide 2210.
A preferred technical scheme of the embodiment is as follows: the pressure sensor module is installed on a cover 229, the cover 229 covers the X-axis moving slide 2210 and covers the front projection image capturing module and the side projection image capturing module, the lower end of the cover 229 is open, the pressure sensor module includes:
A linear cylinder block mounted on the front side of the cover 229;
a linear cylinder 223 mounted on the linear cylinder block;
an L-shaped bracket in driving connection with the linear cylinder 223;
a pressure sensor 222 mounted on the L-shaped bracket with the sensor head facing downwards;
the guide post 224 is installed on the L-shaped bracket, and the guide post 224 is arranged on the linear cylinder seat in a penetrating way.
A preferred technical scheme of the embodiment is as follows: as shown in fig. 11, in the reject transfer unit, the second Y-axis moving module 28 includes a "" bracket 282 mounted on the base 8, a double-row Y-axis guide rail 283 mounted on the "" bracket 282, a second Y-axis motor 281 mounted on the "" bracket 282, a second belt group 284 drivingly connected to the second Y-axis motor 281, and a second slider 285 slidably connected to the double-row Y-axis guide rail 283, wherein the second slider 285 is further fixed to an upstream belt of the second belt group 284;
the lower tray surface of the reject receiving tray 27 is fixed to the second slider 285, and is also supported by two sets of roller brackets;
the roller bracket comprises a supporting plate 272 which is laterally arranged on the bracket 282, and rollers 271 which are rotatably arranged on the supporting plate 272, wherein the lower disc surface of the reject receiving tray 27 is arranged on the two rollers 271.
Example 2:
the following is a detection method of the LED patch detection device, which comprises the following detection steps:
step one, a test disc 9 filled with LED patches is fed into a feeding platform 211 by an external automatic feeding vehicle, the feeding platform 211 is provided with a positioning structure to accurately position the test disc 9, and a first X-axis moving module 210 drives a feeding mechanism 23 to reach above the test disc 9;
step two, a first Z-axis motor 232 on the feeding mechanism 23 drives a second voice coil motor 234 to reach a preset height, the second voice coil motor 234 drives a first vacuum adsorption plate 212 to descend so that an adsorption head on the second voice coil motor is tightly attached to the edge of the test disc 9, a first pressure sensor module 237 senses pressure, and when the pressure reaches a preset value, the second voice coil motor 234 stops working and starts a first vacuum negative pressure system so that the first vacuum adsorption plate 212 can tightly adsorb the test disc 9;
step three, the second voice coil motor 234 drives the first vacuum adsorption plate 212 to ascend, the first X-axis moving module 210 drives the feeding mechanism 23 to reach the upper part of the detection platform 24, the first Z-axis motor 232 drives the second voice coil motor 234 to descend and reach a preset height, the second voice coil motor 234 drives the first vacuum adsorption plate 212 to descend so that the test disc 9 is placed on the detection platform 24, meanwhile, the first pressure sensor module 237 senses pressure, when the pressure reaches a preset value, the second voice coil motor 234 stops working, and the first vacuum adsorption plate 212 keeps pressure;
In step three, the second voice coil motor 234 drives the first vacuum adsorption plate 212 to descend, and the linear cylinder 223 drives the pressure sensor 222 to abut against the first vacuum adsorption plate 212 and apply pressure;
step five, the array circuit module on the detection platform 24 is electrified to enable each LED patch to conduct a circuit, when one or more LED patches are not bright, a processing center reads the coordinates of the non-bright LED patches, records all the coordinates to form defective product coordinate signals and transmits the defective product coordinate signals to a defective product taking manipulator, and the defective product taking manipulator receives all the defective product coordinate signals and waits;
step six, after the power-on detection of the LED patch is completed, the array circuit module is powered off, the pressure sensor 222 is driven to ascend by the linear cylinder 223, the second voice coil motor 234 drives the first vacuum adsorption plate 212 to ascend, the first Z-axis motor 232 drives the second voice coil motor 234 to ascend to a preset height, and the first X-axis moving module 210 resets the feeding mechanism 23;
step seven, an LED patch array on the test disc 9 is exposed, at the moment, a CCD detection group 22 is started, firstly, a front projection image taking module is powered on to work, the front projection image taking module is used for taking and transmitting all images of the test disc 9 to a processing center through the cooperation of a first Y-axis moving module 21 and a third X-axis moving module, the processing center is used for comparing the front projection images of the LED patches with a preset front projection image to judge whether the LED patches are in place or not, when one or more LED patches in the front projection images and the preset front projection image exceed an error value, the processing center judges that the LED patches corresponding to the error value are unqualified products, and generates unqualified product LED coordinates to be sent to an unqualified product taking manipulator, and the unqualified product taking manipulator receives all unqualified product coordinate signals and continues to wait;
Step eight, after the front projection image capturing module finishes the image capturing work, the power is cut off, the side projection image capturing module is started, and the process is consistent with that of the step seven, the side projection image capturing module laterally projects the LED patch through the second light source 2214, so that a shadow area of the LED patch and an LED patch image are shot together by the second CCD image sensor 2212, the second CCD image sensor 2212 transmits the LED patch image and the shadow area image to the processing center, the processing center judges whether the height of the LED patch meets the requirement or not through judging the projection length of the shadow area, and the LED patch which does not meet the requirement is judged by the processing center to be a defective product, records the coordinates of the defective LED patch and sends the defective product to the defective product material taking manipulator;
step nine, the side projection image capturing module finishes image capturing and cuts off power supply, the second X-axis moving module 29 drives the discharging mechanism 25 to reach the position above the detection platform 24, the unqualified product taking manipulator accurately finds the coordinate positions of all unqualified LED patches through the second X-axis moving module 29 and the first Y-axis moving module 21 and captures the unqualified LED patches one by one, and the second X-axis moving module 29 drives the discharging mechanism 25 to move the unqualified LED patches one by one to the position above the discharging platform 26;
step ten, the disqualified transfer group synchronously receives coordinate quantity signals of disqualified LED patches, the second Y-axis moving module 28 drives the disqualified product receiving tray 27 to reach the position below the disqualified product taking manipulator, the disqualified product taking manipulator cancels negative pressure to enable the disqualified LED patches to fall into the disqualified product receiving tray 27, and after all disqualified LED patches are transferred to the disqualified product receiving tray 27, the disqualified transfer group resets;
Eleven, the second X-axis moving module 29 drives the discharging mechanism 25 to the detecting platform 24, the discharging mechanism 25 enables the second vacuum adsorption plate 213 to take out the test disc 9 with the qualified LED patches, then the discharging mechanism 25 is driven to the discharging platform 26 through the second X-axis moving module 29, the discharging mechanism 25 cancels the negative pressure, and the test disc 9 with the qualified LED patches is placed on the discharging platform 26;
step twelve, the external automatic discharging vehicle takes off and stores the test disc 9 placed on the discharging platform 26.
Example 3:
the engine body outer cover 3 of the LED patch detection equipment is also provided with the alarm lamp 4, and the alarm lamp 4 has an alarm function and prompts the machine to fail and needs maintenance.
Example 4:
the bottom of the frame of the LED patch detection device is also provided with an exhaust fan 5, an industrial personal computer 6 and a silencing device 7 respectively. The exhaust fan 5 is used for radiating, the industrial personal computer 6 is used for controlling the operation of the whole mechanism, and the silencing device 7 is used for reducing noise.
Example 5:
as shown in fig. 12, fig. 12 is a structural diagram of another material loading mechanism of the present invention, a second material loading mechanism 10 replaces the material loading mechanism in fig. 4, where the second material loading mechanism 10 includes a platform support 101, an adsorption platform 102 and a positioning head 103, the platform support 101 is mounted on the original first Y-axis moving module 21, the adsorption platform 102 is mounted on the platform support 101, a positioning head 103 is mounted on one edge of the adsorption platform 102, and a plurality of detection pins are disposed beside the positioning head 103, a linear negative pressure hole is disposed on the adsorption platform 102, so that a thin LED module can be sucked through the linear negative pressure hole, and the thin LED module is positioned by the positioning head 103, and automatically abuts against the plurality of detection pins to form an abutting electrical connection structure after the thin LED module is positioned. After the detection pins are electrified, the thin LED module emits light, and the thin LED module emits no light, and is defective, and then the thin LED module is fed and discharged through the feeding mechanism 23 and the discharging mechanism 25.
In summary, the LED patch detection device is full-automatic detection device, and is capable of automatically feeding and detecting, separating qualified products and unqualified products after detection, and improving detection efficiency. According to the invention, each LED patch is positioned in a coordinate mode, an array circuit module is arranged on the detection platform 24 for power supply detection of each LED patch, the coordinates of the unlit LED patches are judged through the processing center, so that defective product coordinates are formed by the coordinates, the defective product coordinates are sent to the defective product taking manipulator for taking materials, and the defective LED patches are accurately taken out. The invention adopts two groups of CCD image capturing modules, namely a front projection image capturing module and a side projection image capturing module, the front side of the LED patch is shot through the front projection image capturing module, the formed pattern is compared with the set pattern, the error of the circumference is larger, the failed LED patch is judged to be failed, and a failed coordinate is formed, the failed coordinate is sent to a failed product taking manipulator for taking materials, the failed LED patch is accurately taken out, the length of a shadow area of the LED patch is judged through the side projection image capturing module, if the shadow area is larger than the size of the shadow area of a preset image, the thickness of the LED patch is large, and if the shadow area is shorter than the size of the shadow area of the preset image, the LED patch is thin, therefore, the failed LED patch is judged by a processing center, the failed coordinate is given, the failed coordinate is sent to the failed product taking manipulator for taking materials, and the failed LED patch is accurately taken out. According to the unloading group, two groups of mechanisms are arranged in a mode of avoiding openings, so that the unqualified product taking manipulator does not occupy space.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (1)
1. The detection method of the LED patch detection equipment comprises a frame (1), a seat (8) arranged on the frame (1) and a detection unit (2) arranged on the seat (8), and is characterized in that the detection unit (2) comprises:
the material loading mechanism is provided with a first Y-axis moving module (21) and a detection platform group which is in driving connection with the first Y-axis moving module (21) and is driven by the first Y-axis moving module (21) to do Y-axis movement, the detection platform group is provided with a lifting mechanism (2103) and a detection platform (24) in driving connection with the lifting mechanism (2103), and the detection platform (24) is provided with an array circuit module for power supply detection of each LED patch;
the feeding group is provided with a feeding mechanism (23) and a first X-axis moving module (210) for driving the feeding mechanism (23) to reciprocate between a feeding platform (211) and a detection platform (24), wherein the first X-axis moving module (210) is provided with a first vacuum negative pressure system, and the first vacuum negative pressure system is used for sucking and conveying a test disc (9) on the feeding platform (211) to the detection platform (24) through vacuumizing to form negative pressure;
The unloading group is provided with an unloading mechanism (25) and a second X-axis moving module (29) for driving the unloading mechanism (25) to reciprocate between the detection platform (24) and the discharging platform (26), the second X-axis moving module (29) is provided with a second vacuum negative pressure system, the second vacuum negative pressure system is used for sucking and conveying a test disc (9) positioned on the detection platform (24) to the discharging platform (26) through vacuumizing, and the unloading group is also provided with a defective product taking manipulator;
the CCD detection group (22) is provided with a portal frame (227) arranged on the seat table (8), a third X-axis moving module arranged on the portal frame (227), a CCD image sensing module and a pressure sensor module, wherein the CCD image sensing module is in driving connection with the third X-axis moving module, the shot image range of the CCD image sensing module covers the detection platform (24), the CCD image sensing module is provided with two groups of CCD image sensors and two groups of light sources, one group of CCD image sensors and one group of light sources form a front projection image taking module, the other group of CCD image sensors and the other group of light sources form a side projection image taking module, images are respectively taken through the front projection image taking module and the side projection image taking module and are transmitted to a processing center, the shot images are analyzed and judged to be qualified and unqualified, the unqualified products are given a coordinate value through the processing center, the unqualified products on the detection platform (9) are taken out through the unqualified products taking manipulator, and the pressure sensor module can press the detection platform (9);
The disqualified transfer group is arranged on the seat (8) and is provided with a second Y-axis moving module (28) and a disqualified product receiving tray (27) driven by the second Y-axis moving module (28) to move in the Y-axis direction, and the second Y-axis moving module (28) can drive the disqualified product receiving tray (27) to receive materials below the disqualified product taking manipulator;
in the loading mechanism, the first Y-axis moving module (21) comprises:
the first Y-axis motor (2104) is fixed on the seat table (8) through a first motor seat, and two parallel first Y-axis guide rail seats (2101) are also arranged on the seat table (8);
two first Y-axis guide rails (2102) respectively mounted on the two first Y-axis guide rail seats (2101);
the first screw rod (2105) is positioned between the two first Y-axis guide rail seats (2101) and is in driving connection with the first Y-axis motor (2104), and the outer end of the first screw rod (2105) is fixed on the seat table (8) through the first screw rod seats;
the first sliding seat is slidably connected to the two first Y-axis guide rail seats (2101) and is in threaded connection with the first screw rod (2105), and the first sliding seat is driven to move in the Y axial direction by the rotation of the first screw rod (2105);
the power source of the lifting mechanism (2103) is a first voice coil motor, the first voice coil motor is fixed on the first sliding seat through a voice coil motor seat, and the driving end of the first voice coil motor is connected with a platform seat;
The table top of the detection platform (24) is divided into matrix groove surfaces, each groove surface is provided with an elastic detection needle, and the bottom surface of the test disc (9) is provided with a contact terminal correspondingly matched with the elastic detection needle;
the first X-axis moving module (210) drives the feeding mechanism (23) to move in the X-axis direction through a first belt group;
the second X-axis moving module (29) drives the discharging mechanism (25) to move in the X-axis direction through a second belt set;
the feeding mechanism (23) comprises:
the first supporting seat (231) is fixed on the first X-axis moving module (210) through a first vertical bracket;
the first Z-axis motor (232) is arranged on one side of the first supporting seat (231) in the Z-axis direction and is in driving connection with the first Z-axis sliding plate (233), and the first Z-axis motor (232) drives the first Z-axis sliding plate (233) to lift;
a second voice coil motor mount (235) mounted on the first Z-axis sled (233);
a second voice coil motor (234) mounted on the second voice coil motor mount (235);
the material taking connecting seat (236) is in driving connection with the second voice coil motor (234) and is driven by the second voice coil motor (234) to do lifting movement, and the lower end of the material taking connecting seat (236) is connected with the first vacuum adsorption plate (212);
A first pressure sensor module (237) mounted on the material taking connection seat (236) and sensing the pressure exerted on the material taking connection seat (236);
the discharge mechanism (25) comprises:
the second supporting seat (251) is fixed on the second X-axis moving module (29) through a second vertical bracket;
the second Z-axis motor (252) is arranged on one side of the second supporting seat (251) in the Z-axis direction and is in driving connection with the second Z-axis sliding plate (253), and the second Z-axis motor (252) drives the second Z-axis sliding plate (253) to lift;
a third voice coil motor mount (255) mounted on the second Z-axis sled (253);
a third voice coil motor (254) mounted on the third voice coil motor mount (255);
the discharging connecting seat (256) is in driving connection with the third voice coil motor (254) and is driven by the third voice coil motor (254) to do lifting motion, the lower end of the discharging connecting seat (256) is connected with a second vacuum adsorption plate (213), and the second vacuum adsorption plate (213) is provided with an avoidance hole for the passing of the unqualified product taking manipulator;
a second pressure sensor module (257) mounted on the discharge connection seat (256) and sensing the pressure applied to the discharge connection seat (256);
the reject reclaiming manipulator includes:
A fixing plate (2514) horizontally mounted on the second supporting seat (251), wherein the fixing plate (2514) is provided with a through hole;
a material taking motor (2510) mounted on the fixed plate, wherein the material taking motor (2510) is in driving connection with a gear (259);
a support roller (2511) fixed to the plate surface of the fixed plate (2514) through a bracket, wherein the roller surface of the support roller (2511) is opposite to the roller surface of the gear (259), and a gap is reserved between the support roller (2511) and the gear (259);
a rack (258) penetrating through the gap, wherein the toothed side of the rack is in meshed connection with the gear (259), and the opposite side of the toothed is abutted against the rolling surface of the supporting roller (2511);
a negative pressure device (2512) mounted at the lower end of the rack (258), wherein the negative pressure device (2512) is connected with a downward suction nozzle (2513), and the lifting path of the suction nozzle (2513) can pass through the avoidance hole;
the third X-axis moving module comprises an X-axis template arranged on one side of a beam of the portal frame (227), a double-row X-axis guide rail (225) arranged on the X-axis template, an X-axis stepping motor (226) arranged on the X-axis template, a second screw rod (228) in driving connection with the X-axis stepping motor (226), and an X-axis moving slide plate (2210) which is in sliding connection with the double-row X-axis guide rail (225) and in threaded connection with the second screw rod (228);
The orthographic projection image capturing module comprises:
a first CCD image sensor (2211) with a downward-facing lens, wherein the first CCD image sensor (2211) is arranged on the upper side of the vertical center line position of the X-axis movable slide plate (2210) through a height adjustable seat (2215);
the first light source (2213) is arranged at the lower side of the vertical center line of the X-axis moving slide plate (2210), and the first light source (2213) is provided with a through hole for the first CCD image sensor (2211) to avoid the lens of the first CCD image sensor (2211);
the side projection image capturing module comprises:
the second CCD image sensor (2212) is installed on the right side of the vertical center line position of the X-axis moving slide plate (2210) through a second height adjusting seat, and the second CCD image sensor (2212) is lower than the first CCD image sensor (2211);
a second light source (2214) mounted on the left side of the vertical center line position of the X-axis moving slide plate (2210);
the pressure sensor module is installed on a cover body (229), the cover body (229) covers on the X-axis movable slide plate (2210) and covers the orthographic projection image capturing module and the side projection image capturing module, the lower end of the cover body (229) is opened, and the pressure sensor module comprises:
A linear cylinder block mounted to a front side of the cover (229);
a linear cylinder (223) mounted on the linear cylinder block;
an L-shaped bracket in driving connection with the linear cylinder (223);
a pressure sensor (222) installed on the L-shaped bracket and with a sensing head facing downwards;
the guide post (224) is arranged on the L-shaped bracket, and the guide post (224) penetrates through the linear cylinder seat;
in the disqualified transfer group, the second Y-axis moving module (28) comprises a -shaped bracket (282) mounted on the seat table (8), a double-row Y-axis guide rail (283) mounted on the -shaped bracket (282), a second Y-axis motor (281) mounted on the -shaped bracket (282), a second belt group (284) in driving connection with the second Y-axis motor (281), and a second sliding seat (285) in sliding connection with the double-row Y-axis guide rail (283), wherein the second sliding seat (285) is also fixed with an uplink belt of the second belt group (284);
the lower disc surface of the reject receiving disc (27) is fixed with the second sliding seat (285), and is also supported by two groups of roller brackets;
the roller bracket comprises a supporting plate (272) which is laterally arranged on the bracket (282) and rollers (271) which are rotatably arranged on the supporting plate (272), and the lower disc surface of the unqualified product receiving disc (27) is arranged on the two rollers (271);
The LED patch detection device further comprises a detection method, and the detection method comprises the following detection steps:
step one, a test disc (9) filled with LED patches is fed into a feeding platform (211) by an external automatic feeding vehicle, the feeding platform (211) is provided with a positioning structure to accurately position the test disc (9), and a first X-axis moving module (210) drives a feeding mechanism (23) to reach above the test disc (9);
step two, a first Z-axis motor (232) on the feeding mechanism (23) drives a second voice coil motor (234) to reach a preset height, the second voice coil motor (234) drives a first vacuum adsorption plate (212) to descend so that an adsorption head on the second voice coil motor is tightly attached to the edge of the test disc (9), a first pressure sensor module (237) senses pressure, and when the pressure reaches a preset value, the second voice coil motor (234) stops working and starts a first vacuum negative pressure system so that the first vacuum adsorption plate (212) can tightly adsorb the test disc (9);
step three, a second voice coil motor (234) drives a first vacuum adsorption plate (212) to ascend, a first X-axis moving module (210) drives a feeding mechanism (23) to reach the upper part of a detection platform (24), a first Z-axis motor (232) drives the second voice coil motor (234) to descend and reach a preset height, the second voice coil motor (234) drives the first vacuum adsorption plate (212) to descend so that a test disc (9) is placed on the detection platform (24), meanwhile, a first pressure sensor module (237) senses pressure, after the pressure reaches a preset value, the second voice coil motor (234) stops working, and the first vacuum adsorption plate (212) keeps pressure;
In the third step, the second voice coil motor (234) drives the first vacuum adsorption plate (212) to descend, and meanwhile, the linear air cylinder (223) drives the pressure sensor (222) to abut against the first vacuum adsorption plate (212) and apply pressure;
step five, the array circuit module on the detection platform (24) is electrified to enable each LED patch to conduct a circuit, when one or more LED patches are not bright, a processing center reads coordinates of the non-bright LED patches, records all coordinates to form defective product coordinate signals, transmits the defective product coordinate signals to a defective product taking manipulator, and the defective product taking manipulator receives all defective product coordinate signals and waits;
step six, after the power-on detection of the LED patch is completed, the array circuit module is powered off, the pressure sensor (222) is driven to ascend by the linear cylinder (223), the second voice coil motor (234) drives the first vacuum adsorption plate (212) to ascend, the first Z-axis motor (232) drives the second voice coil motor (234) to ascend to a preset height, and the first X-axis moving module (210) resets the feeding mechanism (23);
step seven, an LED patch array on a test disc (9) is exposed, a CCD detection group (22) is started at the moment, a front projection image taking module is powered on to work, the front projection image taking module is enabled to grasp and transmit all images of the test disc (9) to a processing center through the cooperation of a first Y-axis moving module (21) and a third X-axis moving module, the processing center judges whether the LED patches are positioned correctly through the comparison of the front projection images of the LED patches and a preset front projection image, when one or more LED patches in the front projection images and the preset front projection image exceed an error value, the processing center judges that the LED patches corresponding to the error value are unqualified products, and generates unqualified product LED coordinates to be sent to an unqualified product taking manipulator, and the unqualified product taking manipulator receives all unqualified product coordinate signals and continues waiting;
Step eight, after the front projection image capturing module finishes the image capturing work, the power is off, the side projection image capturing module is started, the side projection image capturing module is consistent with the process of the step seven, the LED patches are projected laterally through a second light source (2214), a shadow area of the LED patches and LED patch images are shot together by a second CCD image sensor (2212), the second CCD image sensor (2212) transmits the LED patch images and the shadow area images to a processing center, the processing center judges whether the heights of the LED patches meet the requirements or not through judging the projection lengths of the shadow areas, and the LED patches which do not meet the requirements are judged to be unqualified by the processing center and recorded with unqualified LED patch coordinates and sent to an unqualified product material taking manipulator;
step nine, the side projection image capturing module finishes image capturing and cuts off power supply, the second X-axis moving module (29) drives the discharging mechanism (25) to reach the upper part of the detection platform (24), the unqualified product taking manipulator accurately finds the coordinate positions of all unqualified LED patches through the second X-axis moving module (29) and the first Y-axis moving module (21) and captures the unqualified LED patches one by one, and the second X-axis moving module (29) drives the discharging mechanism (25) to move the unqualified LED patches one by one to the upper part of the discharging platform (26);
step ten, the disqualified transfer group synchronously receives coordinate quantity signals of disqualified LED patches, a second Y-axis moving module (28) drives a disqualified product receiving tray (27) to reach the lower part of a disqualified product taking manipulator, the disqualified product taking manipulator cancels negative pressure to enable the disqualified LED patches to fall into the disqualified product receiving tray (27), and when all disqualified LED patches are transferred to the disqualified product receiving tray (27), the disqualified transfer group resets;
Eleventh, the second X-axis moving module (29) drives the discharging mechanism (25) to the detecting platform (24), the discharging mechanism (25) enables the second vacuum adsorption plate (213) to take out the testing disc (9) filled with the qualified LED patches, then the discharging mechanism (25) is driven to the discharging platform (26) through the second X-axis moving module (29), the discharging mechanism (25) cancels negative pressure, and the testing disc (9) filled with the qualified LED patches is placed on the discharging platform (26);
and step twelve, the external automatic discharging vehicle takes off and stores the test disc (9) placed on the discharging platform (26).
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