CN106814066A - Appearance delection device and method - Google Patents

Abstract

The present invention provides a kind of appearance delection device and method, and the device includes frame, the electronic installation for placing outward appearance to be detected；Memory cell, for data storage storehouse；Light source cell, for providing light source；Face battle array image unit, the sequence number for shooting electronic installation；Linear image unit, for shooting the position that electronic installation needs outward appearance to detect；And processing unit, for obtaining the sequence number in serial number image, contrast the predetermined sequence number in the sequence number and serial number data storehouse, judge whether the sequence number of the electronic installation is correct, when the sequence number is correct, appearance images are contrasted with corresponding image in standard appearance images storehouse, judged whether the appearance images are identical with a standard appearance images, and when the sequence number of the electronic installation is correct and appearance images are identical with a standard appearance images, determine that the outward appearance of the electronic installation is normal.The present invention can automatic detection electronic installation outward appearance, without artificial participation, accuracy of detection can be improved.

Description

Appearance inspection device and method

technical field

The invention relates to the field of detection, in particular to an appearance detection device and method.

Background technique

In the prior art, when performing appearance inspection on products in the production line, it is usually necessary to manually check whether the appearance of the products is defective. However, artificial vision is prone to deviation, which reduces the accuracy of appearance inspection and poor detection ability.

Contents of the invention

In view of this, it is necessary to provide an appearance inspection device and method to solve the above technical problems.

The invention provides an appearance inspection device, which includes a frame, a storage unit and a processing unit, the frame is used to place an electronic device to be inspected for appearance, and the storage unit stores

A database, which includes a serial number database and a standard appearance image library, is characterized in that the appearance detection device also includes:

A light source unit, used to provide a light source;

A side-array camera unit for photographing the serial number of the electronic device;

A linear camera unit, used to photograph the parts of the electronic device that need appearance inspection;

The processing unit is used to obtain the serial number in the serial number image of the electronic device, compare the serial number with the preset serial number of the electronic device in the serial number database, and determine whether the serial number of the electronic device is correct;

The processing unit is also used for comparing the appearance image of the electronic device with the image corresponding to the serial number in the standard appearance image library when the serial number of the electronic device is correct, and judging whether the appearance image of the electronic device is consistent with a standard identical in appearance; and

The processing unit is also used for determining that the appearance of the electronic device is normal when the serial number of the electronic device is correct and the appearance image is the same as a standard appearance image.

The present invention also provides an appearance inspection method, which is applied to an appearance inspection device, the device includes a rack and a storage unit, the rack is used to place an electronic device whose appearance is to be inspected, and the storage unit stores

Database, the image database includes a serial number database and a standard appearance image library, characterized in that the appearance detection method includes:

Photographing the serial number of the electronic device through a camera unit;

Photographing the parts of the electronic device that require appearance inspection through a linear camera unit;

Obtaining the serial number in the serial number image of the electronic device;

comparing the serial number with the preset serial number of the electronic device in the serial number database to determine whether the serial number of the electronic device is correct;

When the serial number of the electronic device is correct, comparing the appearance image of the electronic device with the image corresponding to the serial number in the standard appearance image database, and judging whether the appearance image of the electronic device is the same as a standard appearance image; and

When the serial number of the electronic device is correct and the appearance image is the same as a standard appearance image, it is determined that the appearance of the electronic device is normal.

Compared with the prior art, the present invention provides an appearance detection device and method that uses optical detection instead of artificial vision, which can automatically detect the appearance of electronic devices, effectively improving the accuracy of the appearance detection of electronic devices and the ability to detect defects.

Description of drawings

Fig. 1 is an overall schematic diagram of a preferred embodiment of the appearance inspection device of the present invention.

Fig. 2 is a hardware structure diagram of a preferred embodiment of the appearance inspection device of the present invention.

Fig. 3 is a schematic diagram of a frame in a preferred embodiment of the appearance inspection device of the present invention.

Fig. 4 is a schematic view of the internal structure of the rack in a preferred embodiment of the appearance inspection device of the present invention.

Fig. 5 is a schematic diagram of the internal structure of the rack in another viewing angle of the preferred embodiment of the appearance inspection device of the present invention.

Fig. 6 is a schematic diagram of the first carrying platform in a preferred embodiment of the appearance inspection device of the present invention.

Fig. 7 is a flow chart of a preferred embodiment of the appearance inspection method of the present invention.

Description of main component symbols

Appearance inspection device 1 frame 10 guide 11 slide rail 12 first carrier 20 first guide plate twenty one second guide plate twenty two positioning mechanism twenty three training wheel 230 connecting plate 231 spring 232 Fixed block 233 stop plate twenty four Second carrier 30 belt 40 first sensor 50 second sensor 60 third sensor 70 storage unit 100 image database 101 Serial Number Image Library 102 Standard Look Image Gallery 103 processing unit 200 light source unit 300 ring light 301 linear light source 302 area camera unit 400 Linear camera unit 500 RF unit 600 Display unit 700 alarm unit 800

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

Please refer to FIG. 1 to FIG. 2 , which are the appearance inspection device 1 provided by the present invention. The appearance inspection device 1 includes a storage unit 100 , a processing unit 200 and a frame 10 . An electronic device 2 to be inspected for appearance is placed in the rack 10 . The storage unit 100 stores a database 101 . The image database 101 includes a serial number database 102 and a standard appearance image database 103 . In this embodiment, the serial number database 102 stores serial numbers of a plurality of electronic devices 2, and the standard appearance image database 103 stores a plurality of standard appearance images corresponding to parts of the electronic device 2 whose appearance needs to be detected, wherein , the plurality of standard appearance images are images corresponding to when the appearance of the parts to be detected by the electronic device 2 is normal. The electronic device 2 can be a smart phone or a personal computer, etc. The parts of the electronic device 2 that need to detect the appearance may include, but not limited to, a casing, a display panel, a keyboard, characters, signs, and the like.

Please refer to FIG. 2 to FIG. 5 , the appearance inspection device 1 further includes a light source unit 300 , an array camera unit 400 and a linear camera unit 500 . The light source unit 300 is used to provide a light source for shooting by the camera unit. In this embodiment, the light source unit 300 includes a ring light source 301 and a linear light source 302 . Wherein, the ring light source 301 is fixed above the area array camera unit 400 for illuminating the serial number of the electronic device 2, and the linear light source 302 is fixed on the linear camera unit 500 for illuminating the appearance of the electronic device 2. detection site.

As shown in FIG. 4 , the area array camera unit 400 is used to capture the serial number of the electronic device 2 . In this embodiment, the area array imaging unit 400 is an area array camera.

The linear camera unit 500 is used for photographing the parts of the electronic device 2 that need to be inspected. In this embodiment, the line camera unit 500 is a line array camera. Since the appearance inspection images have high requirements on precision, the linear imaging unit 500 can scan and capture the parts of the electronic device 2 that need appearance inspection multiple times within a preset period of time, thereby obtaining multiple strip images. After processing, the strip images can be merged into a complete image, and the complete image is the image of the part of the electronic device 2 that needs appearance inspection.

The processing unit 200 is used to obtain the serial number in the serial number image of the electronic device 2 , compare the serial number with the preset serial number in the serial number database 102 , and determine whether the serial number of the electronic device 2 is correct.

The processing unit 200 is also used to compare the appearance image of the electronic device 2 with the image corresponding to the serial number in the standard appearance image library 103 to determine the appearance of the electronic device 2 when the serial number of the electronic device 2 is correct. Whether the image is the same as a standard appearance image. In this embodiment, the serial number corresponds to the country information of the electronic device 2. Since the electronic devices 2 of different countries may have different appearances, the processing unit 200 needs to compare the appearance image with the standard appearance image. The standard appearance images corresponding to the country of the electronic device 2 in the library 103 are compared.

Specifically, the processing unit 200 first identifies the part of the electronic device 2 displayed by the appearance image of the electronic device 2 , and then compares the appearance image of the electronic device 2 with images of the same part in the standard appearance image library 103 . Specifically, the processing unit 200 divides the appearance image of the electronic device 2 into multiple image areas, and compares the outline of each image area with the outline of the corresponding area of the standard appearance image. Whether the appearance image of the electronic device 2 is the same as a standard appearance image is determined based on the proportion of the image area with the same outline. When the processing unit 200 determines that the proportion of the image area in the appearance image of the electronic device 2 that has the same outline as the corresponding area of a standard appearance image reaches a preset ratio, it means that the appearance image of the electronic device 2 is different from the standard appearance image. same.

In other implementations, the processing unit 200 can also obtain the pixel value of each pixel of the appearance image of the electronic device 2, by comparing the pixel value of each pixel on the appearance image with the pixel value of the corresponding pixel of the standard appearance image Values are compared, and the proportion of pixels with the same or similar pixel values is determined to determine whether the appearance image of the electronic device 2 is the same as a standard appearance image.

The processing unit 200 is also used for determining that the appearance of the electronic device 2 is normal when the serial number of the electronic device 2 is correct and the appearance image is the same as a standard appearance image. When the serial number of the electronic device 2 is wrong or the appearance image is different from all the standard appearance images corresponding to the serial number, the processing unit 200 determines that the appearance of the electronic device 2 is bad.

As shown in Figure 5, the appearance inspection device 1 also includes a radio frequency unit 600, which is placed parallel to the electronic device 2, and is used to scan the label of the electronic device 2 and obtain preset information of the electronic device 2 . Wherein, the preset information includes, but not limited to, the identification code and serial number of the electronic device 2 . In this embodiment, the radio frequency unit 600 is a radio frequency identification reader.

As shown in FIG. 3, further, the appearance inspection device 1 further includes a display unit 700, which is used to display that the inspection has passed when the appearance of the electronic device 2 is normal, and when the appearance of the electronic device 2 is bad. Displays detected abnormalities and their causes.

Further, the appearance detection device 1 further includes an alarm unit 800, which is used for sending a warning message when the appearance of the electronic device 2 is bad. In this embodiment, the alarm unit 800 is a warning light, and the warning message is that the warning light turns red.

Further, the storage unit 100 is also used for storing the appearance detection result of the electronic device 2 .

Please refer to FIG. 6 together. In this embodiment, the appearance inspection device 1 further includes a first carrier 20 , a second carrier 30 and a carrier 80 . The first carrying platform 20 and the second carrying platform 30 are both provided with a belt 40 . The electronic device 2 to be tested is placed on the carrier 80 . The first supporting platform 20 is provided with a first guide plate 21 , a second guide plate 22 , a positioning mechanism 23 , a stop plate 24 and an air cylinder (not shown in the figure). The frame 10 is provided with two guide rails 11 . The positioning mechanism 23 includes two auxiliary wheels 230 , a connecting plate 231 , two springs 232 and a fixing block 233 . The connecting plate 231 is used to connect the two auxiliary wheels 230 , the two springs 232 are fixed between the connecting plate 231 and the fixing block 233 , and the fixing block 233 is fixed on the edge of the first carrying platform 20 . The first guide plate 21 faces a guide rail 11 , and the second guide plate 22 abuts against an auxiliary wheel 230 of the positioning mechanism 23 . The positioning mechanism 23 is used for auxiliary positioning of the electronic device under test. When the carrier 80 carrying the electronic device 2 moves through the second guide plate 22 to contact the auxiliary wheels 230, the two auxiliary wheels 230 can be pushed. The wheel 230 and the spring 232 move toward the fixed block 233 , so that the positioning mechanism 23 can position the carrier 80 under the elastic force of the spring 232 , so that the carrier 80 can be accurately moved to the two guide rails 11 . The blocking plate 24 is movably fixed between the first guiding plate 21 and the two guiding rails 11 .

As shown in FIGS. 1 and 3 , the appearance inspection device 1 further includes a first sensor 50 , a second sensor 60 and a third sensor 70 . The first sensor 50 is fixed on the first guide plate 21 . The second sensor 60 is fixed on a position of a guide rail 11 close to the stop plate 24 . The third sensor 70 is fixed at a middle position of a guide rail 11 .

When the first sensor 50 detects that there is an electronic device 2 to be tested on the first platform 20 , the processing unit 200 controls the belt 40 and the two guide rails 11 on the first platform 20 to start running. When the third sensor 70 does not detect the electronic device 2 to be tested, the processing unit 200 controls the cylinder to lower the stop plate 24, so that the electronic device 2 to be tested on the first carrier 20 can move along the Two guide rails 11 enter the frame 10 for detection. When the second sensor 60 detects that the electronic device under test 2 passes through the stop plate 24 , the processing unit 200 controls the air cylinder to raise the stop plate 24 .

When the third sensor 70 detects the electronic device 2 to be tested, the processing unit 200 controls the belt 40 on the first loading platform 20 and the two guide rails 11 to stop running. At this time, the electronic device 2 to be tested stay in the frame 10.

As shown in FIGS. 1 , 4 and 5 , the rack 10 further includes a slide rail 12 . When the linear camera unit 500 captures the portion of the electronic device 2 that needs appearance inspection, the processing unit 200 controls the linear camera unit 500 to move along the slide rail 12 . When the linear imaging unit 500 finishes linear scanning, control the linear imaging unit 500 to reset along the slide rail 12, and at the same time, the processing unit 200 also controls the two guide rails 11 to continue running, so that the electronic device 2 that completes the appearance detection can move along the sliding rail 12. The guide rail 11 moves onto the second carrying platform 30 .

Please refer to FIG. 7 , which is a flow chart of the appearance detection method of the present invention.

S10, photographing the serial number of the electronic device 2 through the one-array camera unit 400 .

S20, using a linear camera unit 500 to photograph the part of the electronic device 2 that needs appearance inspection.

S30, acquiring the serial number in the serial number image of the electronic device 2;

S40, compare the serial number with the preset serial number of the electronic device 2 in the serial number database 102, and determine whether the serial number of the electronic device 2 is correct.

S50, when the serial number of the electronic device 2 is correct, compare the appearance image of the electronic device 2 with the image corresponding to the serial number in the standard appearance image library 103, and judge whether the appearance image of the electronic device 2 is consistent with a standard The exterior image is the same.

S60, when the serial number of the electronic device 2 is correct and the appearance image is the same as a standard appearance image, determine that the appearance of the electronic device 2 is normal.

S70, when the serial number of the electronic device 2 is wrong or the appearance image is different from all the standard appearance images corresponding to the serial number, determine that the appearance of the electronic device 2 is bad.

Wherein, the appearance detection method further includes the step of: scanning the label of the electronic device 2 and obtaining preset information of the electronic device 2 .

Further, the appearance detection method further includes the step of: when the appearance of the electronic device 2 is normal, display the detection passed on the display unit 700; when the appearance of the electronic device 2 is bad, display the detection abnormality on the display unit 700 and the cause of the exception.

Further, the appearance inspection method further includes a step: when the appearance of the electronic device 2 is bad, sending out a warning message through the alarm unit 800 .

Further, the appearance detection method further includes a step of: storing the appearance detection result of the electronic device 2 .

Finally, it should be noted that the above examples are only used to illustrate the implementation of the present invention without limitation, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. An appearance detection device, the appearance detection device comprising a frame, a storage unit and a processing unit, the frame is used to place an electronic device to be detected appearance, the storage unit stores a database, the database includes a sequence Number database and standard appearance image library, it is characterized in that, this appearance detection device also includes: A light source unit, used to provide a light source; A side-array camera unit for photographing the serial number of the electronic device; A linear camera unit, used to photograph the parts of the electronic device that need appearance inspection; The processing unit is used to obtain the serial number in the serial number image of the electronic device, compare the serial number with the preset serial number of the electronic device in the serial number database, and determine whether the serial number of the electronic device is correct; The processing unit is also used for comparing the appearance image of the electronic device with the image corresponding to the serial number in the standard appearance image library when the serial number of the electronic device is correct, and judging whether the appearance image of the electronic device is consistent with a standard identical in appearance; and The processing unit is also used for determining that the appearance of the electronic device is normal when the serial number of the electronic device is correct and the appearance image is the same as a standard appearance image. 2. The appearance inspection device according to claim 1, characterized in that: the processing unit is also used to determine when the serial number of the electronic device is wrong or the appearance image is different from all standard appearance images corresponding to the serial number The appearance of the electronic device is poor. 3. Appearance inspection device as claimed in claim 2, is characterized in that, this appearance inspection device also comprises: The radio frequency unit is used to scan the label of the electronic device and obtain the preset information of the electronic device; a display unit for displaying that the detection is passed when the appearance of the electronic device is normal, and displaying the abnormality and the cause of the abnormality when the appearance of the electronic device is bad; an alarm unit, configured to issue a warning message when the electronic device has a bad appearance; and The storage unit is also used for storing the appearance detection result of the electronic device. 4. The appearance inspection device according to claim 1, characterized in that: the appearance inspection device also comprises a first carrying platform, a second carrying platform and a carrier, the first carrying platform and the second carrying platform Belts are provided, the electronic device to be tested is placed on the carrier, a first guide plate, a second guide plate, a positioning mechanism and a stop plate are arranged on the first carrier platform, and the frame is provided with Two guide rails, the first guide plate is facing a guide rail, the second guide plate is connected to the positioning mechanism, and the positioning mechanism is used to assist the positioning of the electronic device under test, and the stopper plate is movably fixed to the first guide plate and between the two rails. 5. The appearance detection device according to claim 4, characterized in that: the appearance detection device further comprises a first sensor, a second sensor and a third sensor, the first sensor is fixed on the first sensor On a guide plate, the second inductor is fixed at a position of a guide rail close to the stop plate, and the third inductor is fixed at a middle position of a guide rail. 6. The appearance inspection device according to claim 5, wherein the processing unit is further configured to control the first carrier when the first sensor detects that the electronic device to be tested is on the first carrier. The belt on the platform and the guide rail start to run; when the third sensor does not detect the electronic device to be tested, control the stop plate to descend, so that the electronic device to be tested on the first loading platform enters the rack and detect; when the second sensor detects that the electronic device under test passes through the stopper, control the stopper to rise; and when the third sensor detects the electronic device under test, control the The belt on the first carrying platform and this guide rail stop running. 7. The appearance inspection device according to claim 1, wherein the light source unit includes a ring light source and a linear light source, and the ring light source is fixed above the area array camera unit for illuminating the sequence of the electronic device. number; the linear light source is fixed on the linear camera unit for illuminating the part of the electronic device that needs appearance inspection. 8. An appearance inspection method, the method is applied in an appearance inspection device, the device includes a rack and a storage unit, the rack is used to place an electronic device whose appearance is to be inspected, and the storage unit stores a database, The image database includes a serial number database and a standard appearance image library, and it is characterized in that the appearance detection method includes: Photographing the serial number of the electronic device through a camera unit; Photographing the parts of the electronic device that require appearance inspection through a linear camera unit; Obtaining the serial number in the serial number image of the electronic device; comparing the serial number with the preset serial number of the electronic device in the serial number database to determine whether the serial number of the electronic device is correct; When the serial number of the electronic device is correct, comparing the appearance image of the electronic device with the image corresponding to the serial number in the standard appearance image database, and judging whether the appearance image of the electronic device is the same as a standard appearance image; and When the serial number of the electronic device is correct and the appearance image is the same as a standard appearance image, it is determined that the appearance of the electronic device is normal. 9. Appearance detection method as claimed in claim 8, is characterized in that, this method also comprises: When the serial number of the electronic device is wrong or the appearance image is different from all standard appearance images corresponding to the serial number, it is determined that the appearance of the electronic device is bad. 10. The appearance detection method as claimed in claim 9, is characterized in that, the method also comprises: When the appearance of the electronic device is normal, displaying the detection passed on a display unit; When the appearance of the electronic device is bad, displaying the detected abnormality and the cause of the abnormality on the display unit; When the appearance of the electronic device is bad, a warning message is issued through an alarm unit; and The appearance detection result of the electronic device is stored.