CN108088402B - Detection method of gauze foam component for sound box based on CCD visual detection - Google Patents
Detection method of gauze foam component for sound box based on CCD visual detection Download PDFInfo
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- CN108088402B CN108088402B CN201711362559.9A CN201711362559A CN108088402B CN 108088402 B CN108088402 B CN 108088402B CN 201711362559 A CN201711362559 A CN 201711362559A CN 108088402 B CN108088402 B CN 108088402B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The invention relates to a detection method of screen gauze foam components for a sound box based on CCD visual detection, which comprises the steps of collecting data of a standard sample by using a th camera of a CCD visual detection system, collecting the aperture and position coordinates of each air hole on the standard sample, collecting the area and the number of screen gauze holes on the standard sample by using a second camera of the CCD visual detection system, fixing a product to be detected on a jig, collecting the aperture and the position coordinates of each air hole on the product by using a th camera, sequentially collecting the number and the area of the screen gauze holes in each hole by using a second camera, comparing the parameters such as the position, the aperture, the number and the area of the screen gauze holes with the corresponding parameters of the standard sample, automatically judging whether the joint of the screen gauze holes is in place or not, changing the traditional manual detection mode, enabling the detection to be faster, enabling the detection standard to be more uniform , and enabling the quality of the product to be ensured.
Description
The technical field is as follows:
the invention relates to the technical field of electronic product part qualification rate detection, in particular to a detection method of gauze foam components for sound boxes based on CCD visual detection.
Background art:
at present, foam components used at the sound outlet of a sound box product are double-faced adhesive tape foam, no gap exists after the foam is attached to the sound box product, the sound effect is not good, and the quality of the sound box is affected.
The invention content is as follows:
the invention aims to overcome the defects in the prior art and provides detection methods of gauze foam components for sound boxes based on CCD visual detection.
The technical scheme adopted by the invention is that detection methods of the gauze-equipped foam component for the sound box based on CCD visual detection are used for detecting the aperture and the position of an air hole on the gauze-equipped foam component and whether gauze compounding at the air hole is in place, wherein the detection methods comprise the following steps:
firstly, data acquisition is carried out on a standard sample by utilizing an th camera of a CCD visual detection system, the aperture and the position coordinate of each air hole on the standard sample are acquired, the aperture upper limit value and the aperture lower limit value of each air hole and the position degree upper limit value and the position degree lower limit value of each air hole are respectively set according to the acquired aperture and coordinate position data and are stored;
then, a second camera of the CCD visual detection system is used for collecting the area and the number of the meshes of the standard sample gauze, the upper limit value and the lower limit value of the number of the meshes are set according to the number of the meshes in the standard sample gauze, and the missing pasting range value and the partial pasting range value are set according to the area of the meshes of the standard sample gauze; and storing;
then, taking away a standard sample, starting detection on a product to be detected, fixing the product to be detected on a jig, acquiring the aperture and position coordinates of each air hole on the product through an camera, comparing the aperture and position coordinates with a set aperture upper limit value, an aperture lower limit value, a position degree upper limit value and a position degree lower limit value respectively, if a measured value exceeds a range, judging that the product is a defective product, and directly moving the product out for detection;
sequentially acquiring the mesh number and the mesh area of the gauze meshes in each hole through a second camera, respectively comparing the acquired mesh number and the mesh area with a set mesh number upper limit value, a set mesh number lower limit value, a missed pasting range value and a deviated pasting range value, judging as a defective product if the measured mesh number is out of the mesh number upper limit value and the mesh number lower limit value, and moving out for detection; if the area of the mesh exceeds the missing paste range value, determining that the defective product is missed; if the value is lower than the missing pasting range value and higher than the partial pasting range value, judging that the partial pasting defective products are not good, and moving out for detection; if the measured mesh number is within the upper and lower limit values of the mesh number and the mesh area is lower than the bias sticking range value, the product is judged to be qualified, and the detection is finished.
In the above method, the brightness value and the number of removed small cells value are adjusted as necessary before the second camera acquires the image.
The CCD time detection system is also provided with a third camera, and the third camera is used for detecting the number and the area of meshes which are the same as those of the second camera.
The detection method utilizes a CCD visual detection system, detects parameters such as positions of air holes, aperture, quantity and area of the gauze meshes, compares the parameters with corresponding parameters of a standard sample, and automatically judges whether the lamination of the gauze meshes is in place or not accurately, changes the traditional manual detection mode, enables the detection to be faster, enables the detection standard to be more uniform , and can ensure the quality of products.
Description of the drawings:
FIG. 1 is a schematic view of an exploded structure of foam components detected by the detection method of the present invention;
fig. 2 and 3 are diagrams illustrating parameter settings and measured values during detection in the above embodiments.
The specific implementation mode is as follows:
the invention is further illustrated in connection with the following detailed description and the accompanying drawings.
As shown in figure 1, the mesh-gauze-containing foam assembly for the sound box comprises layers of black double-sided adhesive tape foam 1, wherein an upper release film 2 and a lower release film 3 are respectively attached to two sides of the black double-sided adhesive tape foam, a plurality of air holes 11 are formed in the surface, close to the edge, of the black double-sided adhesive tape foam 1, mesh gauze 4 covering the air holes 11 is arranged between the black double-sided adhesive tape foam 1 and the upper release film 2 and at each air hole 11, namely the outer diameter of each mesh gauze 4 is larger than the diameter of each air hole 11, correspondingly machining holes 31 corresponding to the positions of the air holes 11 in the black double-sided adhesive tape foam 1 are formed in the surface of the lower release film 3, layers of protective films 5 are further attached to the outer surface of the lower release film 3, and the protective films 5 can shield the machining holes 31 of the lower release film 3 to prevent dust, foreign matters and the like from entering the process.
The number of the air holes 11 is six, the diameter of each air hole 11 is 1.70 +/-0.05 mm, the number of the corresponding gauze pieces 4 is six, and the diameter of each gauze piece 4 is 2.50 +/-0.05 mm. The gauze pieces 4 are independent, and materials can be saved without using the whole piece.
Referring to fig. 2 and 3, the method for detecting a gauze foam component for a sound box based on CCD visual detection of the present invention is used for detecting the aperture and position of an air hole on the gauze foam component and whether gauze compounding at the air hole is in place, wherein: the detection method comprises the following steps:
firstly, data acquisition is carried out on a standard sample by utilizing an th camera of a CCD visual detection system, the aperture and the position coordinate of each air hole on the standard sample are acquired, the aperture upper limit value and the aperture lower limit value of each air hole and the position degree upper limit value and the position degree lower limit value of each air hole are respectively set according to the acquired aperture and coordinate position data and are stored;
secondly, collecting the area and the number of the net holes of the gauze on the standard sample by using a second camera of the CCD visual detection system, and adjusting the brightness value and removing the number value of the small net holes according to the requirement during collection; setting an upper limit value and a lower limit value of the mesh number according to the number of meshes in the standard sample gauze, and judging that the meshes are blocked if the mesh number is too small; setting a missing pasting range value and a partial pasting range value according to the area of the gauze mesh of the standard sample; then storing; if the area of the meshes does not exceed the missing range value but exceeds the partial sticking range value, the position of the gauze at the hole position is stuck partially, and the holes are judged to be defective products;
then, taking away a standard sample, starting detection on a product to be detected, fixing the product to be detected on a jig, acquiring the aperture and position coordinates of each air hole on the product through an camera, comparing the aperture and position coordinates with a set aperture upper limit value, an aperture lower limit value, a position degree upper limit value and a position degree lower limit value respectively, if a measured value exceeds a range, judging that the product is a defective product, and directly moving the product out for detection;
sequentially acquiring the mesh number and the mesh area of the gauze meshes in each hole through a second camera, respectively comparing the acquired mesh number and the mesh area with a set mesh number upper limit value, a set mesh number lower limit value, a missed pasting range value and a deviated pasting range value, judging as a defective product if the measured mesh number is out of the mesh number upper limit value and the mesh number lower limit value, and moving out for detection; if the area of the mesh hole exceeds the missing pasting range value, judging that a defective product is missed, namely, the gauze is not pasted at the air hole of the product; if the value is lower than the missing pasting range value and higher than the partial pasting range value, judging that the partial pasting defective products are not good, and moving out for detection; if the measured mesh number is within the upper and lower limit values of the mesh number and the mesh area is lower than the bias sticking range value, the product is judged to be qualified, and the detection is finished.
In the method, before the second camera collects the image, the brightness value is adjusted and the quantity value of the small meshes is removed according to the requirement; by varying this parameter, the size of the mesh is found, and the green area in the left image is seen, i.e. the size of the mesh.
The CCD time detection system is also provided with a third camera, the third camera is used for detecting the number and the area of meshes which are the same as those of the second camera, so that the detection efficiency is improved, and the third camera is arranged the same as the second camera.
The detection method utilizes a CCD visual detection system, detects parameters such as positions of air holes, aperture, quantity and area of the gauze meshes, compares the parameters with corresponding parameters of a standard sample, and automatically judges whether the lamination of the gauze meshes is in place or not accurately, changes the traditional manual detection mode, enables the detection to be faster, enables the detection standard to be more uniform , and can ensure the quality of products.
Claims (3)
1, detection method of a gauze foam component for a sound box based on CCD visual detection, which is used for detecting the aperture and position of an air hole on the gauze foam component and whether gauze compounding at the air hole is in place or not, and is characterized in that the detection method comprises the following steps:
firstly, data acquisition is carried out on a standard sample by utilizing an th camera of a CCD visual detection system, the aperture and the position coordinate of each air hole on the standard sample are acquired, the aperture upper limit value and the aperture lower limit value of each air hole and the position degree upper limit value and the position degree lower limit value of each air hole are respectively set according to the acquired aperture and coordinate position data and are stored;
then, a second camera of the CCD visual detection system is used for collecting the area and the number of the meshes of the standard sample gauze, the upper limit value and the lower limit value of the number of the meshes are set according to the number of the meshes in the standard sample gauze, and the missing pasting range value and the partial pasting range value are set according to the area of the meshes of the standard sample gauze and are stored;
then, taking away a standard sample, starting detection on a product to be detected, fixing the product to be detected on a jig, acquiring the aperture and position coordinates of each air hole on the product through an camera, comparing the aperture and position coordinates with a set aperture upper limit value, an aperture lower limit value, a position degree upper limit value and a position degree lower limit value respectively, if a measured value exceeds a range, judging that the product is a defective product, and directly moving the product out for detection;
sequentially acquiring the mesh number and the mesh area of the gauze meshes in each hole through a second camera, respectively comparing the acquired mesh number and the mesh area with a set mesh number upper limit value, a set mesh number lower limit value, a missed pasting range value and a deviated pasting range value, judging as a defective product if the measured mesh number is out of the mesh number upper limit value and the mesh number lower limit value, and moving out for detection; if the area of the mesh exceeds the missing paste range value, determining that the defective product is missed; if the value is lower than the missing pasting range value and higher than the partial pasting range value, judging that the partial pasting defective products are not good, and moving out for detection; if the measured mesh number is within the upper and lower limit values of the mesh number and the mesh area is lower than the bias sticking range value, the product is judged to be qualified, and the detection is finished.
2. The detection method of the gauze foam component with the gauze for the sound box based on the CCD visual detection as claimed in claim 1, is characterized in that: the brightness value and the quantity value of the removed small meshes are adjusted as required before the second camera acquires the image.
3. The detection method of the gauze foam component with the gauze for the sound box based on the CCD visual detection as claimed in claim 1, is characterized in that: the CCD time detection system is also provided with a third camera, and the third camera is used for detecting the number and the area of meshes which are the same as those of the second camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711362559.9A CN108088402B (en) | 2017-12-18 | 2017-12-18 | Detection method of gauze foam component for sound box based on CCD visual detection |
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| CN201711362559.9A CN108088402B (en) | 2017-12-18 | 2017-12-18 | Detection method of gauze foam component for sound box based on CCD visual detection |
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| CN108088402A CN108088402A (en) | 2018-05-29 |
| CN108088402B true CN108088402B (en) | 2020-01-31 |
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| CN111787477A (en) * | 2020-07-30 | 2020-10-16 | 东莞市美芯龙物联网科技有限公司 | Acoustic gauze component and manufacturing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS56154605A (en) * | 1980-05-01 | 1981-11-30 | Dainippon Screen Mfg Co Ltd | Measuring method and device for mesh image density or mesh area rate |
| JP4173257B2 (en) * | 1999-09-06 | 2008-10-29 | シーケーディ株式会社 | Sheet visual inspection device and PTP packaging machine |
| JP2014077755A (en) * | 2012-10-12 | 2014-05-01 | Murata Mfg Co Ltd | Transport device and tranport method of electronic component |
| CN205150638U (en) * | 2015-11-17 | 2016-04-13 | 东莞捷邦实业有限公司 | Cell -phone monitor assembly is with cotton subassembly of bubble of taking double faced adhesive tape |
| CN105588846A (en) * | 2015-12-14 | 2016-05-18 | 天津华迈科技有限公司 | Light-sensitive SMT detecting assembly |
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Address after: Room 201, building 1, No.1, RD 1st Road, Songshan Lake Park, Dongguan City, Guangdong Province 523000 Patentee after: Jiebang Precision Technology Co.,Ltd. Address before: 523000 Dalang Town, Dongguan, Guangdong, No. 71, Ju Xiang Road, Patentee before: DONGGUAN JPOND INDUSTRIAL Co.,Ltd. |