CN111811416A - Device and method for detecting height difference of plane of cooling fan - Google Patents
Device and method for detecting height difference of plane of cooling fan Download PDFInfo
- Publication number
- CN111811416A CN111811416A CN202010601403.7A CN202010601403A CN111811416A CN 111811416 A CN111811416 A CN 111811416A CN 202010601403 A CN202010601403 A CN 202010601403A CN 111811416 A CN111811416 A CN 111811416A
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- fan
- detection
- detection box
- laser
- conveyer belt
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving
Abstract
The invention relates to a detection technology of a cooling fan, in particular to a cooling fan plane height difference detection device and a detection method, which combine a laser emission device, a vision sensor and an image processing technology to realize the accurate detection of the fan plane height difference, improve the detection efficiency and greatly reduce the labor cost, and comprises a detection platform (1), the detection table (1) is provided with a conveyor belt (2) and also comprises a servo motor (3), the servo motor (3) is arranged on the detection table (1) and drives the conveyor belt (2), the conveyor belt (2) is provided with a detection box (5) for placing a fan to be detected and a detection frame (4), the detection frame (4) is arranged on the detection table (1) and positioned above the conveyor belt (2), and also comprises a laser emitter (9) and a visual sensor (10), the laser emitter (9) is installed on the detection frame (4) and located at the edge of the detection frame (4).
Description
Technical Field
The invention relates to a detection technology of a cooling fan, in particular to a cooling fan plane height difference detection device and a cooling fan plane height difference detection method.
Background
The notebook computer technology is developed at a high speed, the performance is greatly improved, meanwhile, the requirement of the machine body on heat dissipation is higher and higher, and the heat dissipation mode commonly adopted in the market at present is air cooling, namely, a fan is used for heat dissipation. However, in such a limited space, the dimensional accuracy of the fan is important to efficiently dissipate heat while reducing noise. The difference in height of the fan plane is an important parameter. The existing detection mode is mainly manual, so that the efficiency is low, and a large measurement error is often generated due to the fact that whether the operation action of a worker is standard or not.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art, and provides a device and a method for detecting the height difference of the plane of a cooling fan.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a poor detection device of radiator fan plane height, is including examining test table, it is equipped with the conveyer belt to examine test table, still includes servo motor, servo motor installs and examines test table and drive the conveyer belt, be the detection box that is used for putting the fan that awaits measuring on the conveyer belt, still include the test rack, the test rack is installed and is examined test table and be located the conveyer belt top, still includes laser emitter and visual sensor, laser emitter installs on examining test rack and towards the conveyer belt, still includes visual sensor, visual sensor installs on examining test rack and towards the conveyer belt.
Preferably, the orientation of the laser emitter and the orientation of the vision sensor form an included angle.
Preferably, the detection box further comprises a positioning sensor and a characteristic point, wherein the positioning sensor is installed at the edge of the conveyor belt, and the characteristic point is arranged on the side wall of the detection box.
Preferably, the detection box is further provided with a limiting block, the fan to be detected is arranged in the detection box, and the limiting block is clamped with the fan to be detected.
In order to solve the technical problems, the invention provides the following technical scheme: a detection method of a cooling fan plane height difference detection device comprises the following steps: the method comprises the following steps: placing the fan to be tested in a detection box, wherein the detection box is used for fixing the position of the fan to be tested; the detection box is placed in a limiting block of the conveyor belt, so that the position and the posture of the detection box are fixed in the conveying process;
step two: when the positioning sensor detects a characteristic point on the detection box, the laser emitter acts to emit a laser to be irradiated on the plane of the fan to be detected, the point is recorded as a point Y0, and the point is recorded as a point Y1 every time the servo motor rotates by a certain angle, and by parity of reasoning, Y2 and Y3 …;
step three: the vision sensor collects laser images on the plane of the fan to be measured and obtains images, laser emitted by the laser emitter is irradiated on the surface of the fan to be measured at a certain angle, because the surface of the fan to be measured has horizontal height difference, a plurality of sections of parallel lines can appear, distances L1 and L2 between laser lines on the surface S1 and the surface S2, the surface S1 and the surface S3 are obtained through image processing, and then the horizontal height difference of the three planes at the Y value can be calculated according to parameters set during installation of the device;
step four: every time the servo motor rotates for a certain angle, the image is collected and processed once, and a characteristic diagram of the horizontal error of the fan plane is established, so that the horizontal error of the surface of the fan to be detected can be detected and analyzed.
The invention has the beneficial effects that: according to the device and the method for detecting the height difference of the plane of the cooling fan, a method of combining a laser position emitter and a vision sensor is adopted, so that the accurate detection of the height difference of the surface of the fan is realized; the moving method of the alternating current servo linear module is adopted, the size detection of the surface of the fan is more refined, and a data model can be accurately established for the height difference condition of the surface of the fan so as to be analyzed.
Drawings
FIG. 1 is a schematic structural diagram of a device for detecting a height difference between planes of a cooling fan according to the present invention;
fig. 2 is a schematic view illustrating a detection of a height difference of a plane of a cooling fan according to the present invention.
Description of the drawings: 1. a detection table; 2. a conveyor belt; 3. a servo motor; 4. a detection frame; 5. a detection cartridge; 6. a limiting block; 7. feature points; 8. a positioning sensor; 9. a laser transmitter; 10. a vision sensor; 11. the fan to be tested.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The detection device for the plane height difference of the cooling fan comprises a detection table 1, wherein a conveyor belt 2 is arranged on the detection table 1, the detection device further comprises a servo motor 3, the servo motor 3 is arranged on the detection table 1 and drives the conveyor belt 2, a detection box 5 for placing a fan to be detected is arranged on the conveyor belt 2, the detection device further comprises a detection frame 4, the detection frame 4 is arranged on the detection table 1 and is positioned above the conveyor belt 2, the detection device further comprises a laser emitter 9 and a visual sensor 10, the laser emitter 9 is arranged on the detection frame 4 and faces the conveyor belt 2, the visual sensor 10 is arranged on the detection frame 4 and faces the conveyor belt 2; an included angle exists between the orientation of the laser emitter 9 and the orientation of the vision sensor 10; the detection device further comprises a positioning sensor 8 and a characteristic point 7, wherein the positioning sensor 8 is arranged at the edge of the conveyor belt 2, and the characteristic point 7 is arranged on the side wall of the detection box 5; the detection box 5 is further provided with a limiting block 6, the fan 11 to be detected is arranged in the detection box 5, and the limiting block 6 is connected with the fan 11 to be detected in a clamping mode.
As shown in fig. 1 and 2, a method for detecting a plane height difference of a cooling fan includes the following steps: the method comprises the following steps: placing the fan 11 to be tested in the detection box 5, wherein the detection box 5 fixes the position of the fan 11 to be tested; the detection box 5 is placed in a limiting block 6 of the conveyor belt 2, so that the position and the posture of the detection box 5 are fixed in the conveying process;
step two: when the positioning sensor 8 detects the feature point 7 on the detection box 5, the laser emitter 9 acts to emit a laser beam to strike the plane of the fan 11 to be detected, and the point is recorded as a point Y0, and every time the servo motor 3 rotates a certain angle, the point is recorded as a point Y1, and so on, Y2 and Y3 …;
step three: the visual sensor 10 collects laser images on the plane of the fan 11 to be measured and obtains images, laser emitted by the laser emitter 9 is emitted on the surface of the fan 11 to be measured at a certain angle, because the surface of the fan 11 to be measured has horizontal height difference, a plurality of sections of parallel lines can appear, distances L1 and L2 between laser lines on the surface S1 and the surface S2, the surface S1 and the surface S3 are obtained through image processing, and then the horizontal height difference of the three planes at the Y value can be calculated according to parameters set during installation of the device;
step four: the servo motor 3 collects and processes images once when rotating a certain angle, and establishes a characteristic diagram of the horizontal error of the fan plane, so that the horizontal error of the surface of the fan 11 to be detected can be detected and analyzed.
The invention uses the laser emitter and the vision sensor as measuring tools, in order to realize the precise detection of the surface level height difference of the fan, an alternating current servo motor, a sensor positioning element and the like are adopted to precisely control the displacement of a workpiece, and simultaneously, the acquired image is fed back to a computer to perform image processing and data calculation and establish a model of the height difference of the horizontal plane of the fan, thereby realizing the functions of automatic measurement, error calculation, detection result display and the like.
The invention is composed of laser and visual detection device, transmission device, computer and other devices. The laser and visual detection device consists of a laser emitter and a visual sensor, and the transmission device consists of an alternating current servo motor, a conveyor belt and the like. As shown in fig. 1.
The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (5)
1. The utility model provides a poor detection device of radiator fan plane height which characterized in that: including examining test table (1), be equipped with conveyer belt (2) on examining test table (1), still include servo motor (3), servo motor (3) are installed and are examined test table (1) and drive conveyer belt (2), be used for putting detection box (5) of the fan that awaits measuring on conveyer belt (2), still including examining test frame (4), examine test frame (4) and install and examine test table (1) and be located conveyer belt (2) top, still include laser emitter (9) and visual sensor (10), laser emitter (9) are installed and are examined test frame (4) and towards conveyer belt (2), still include visual sensor (10), visual sensor (10) are installed and are examined test frame (4) and towards conveyer belt (2).
2. The apparatus for detecting the difference in the height of a cooling fan as set forth in claim 1, wherein: an included angle exists between the orientation of the laser emitter (9) and the orientation of the vision sensor (10).
3. The apparatus for detecting the difference in the height of a cooling fan as set forth in claim 1, wherein: still include position sensor (8) and characteristic point (7), the edge at conveyer belt (2) is installed in position sensor (8), characteristic point (7) are established on the lateral wall that detects box (5).
4. The apparatus for detecting the difference in the height of a cooling fan as set forth in claim 1, wherein: the detection box (5) is further provided with a limiting block (6), the fan (11) to be detected is arranged in the detection box (5), and the limiting block (6) is connected with the fan (11) to be detected in a clamping mode.
5. A method for detecting a device for detecting a difference in level between the planes of a heat dissipating fan according to claim 1, comprising the steps of: the method comprises the following steps: placing a fan (11) to be tested in a detection box (5), wherein the detection box (5) fixes the position of the fan (11) to be tested; the detection box (5) is placed in a limiting block (6) of the conveyor belt (2), so that the position and the posture of the detection box (5) are fixed in the conveying process;
step two: when the positioning sensor (8) detects the characteristic point (7) on the detection box (5), the laser emitter (9) acts to emit a laser to be irradiated on the plane of the fan (11) to be detected, and the point is recorded as a point Y0, and every time the servo motor (3) rotates a certain angle, the point is recorded as a point Y1, and by analogy, Y2 and Y3 … are repeated;
step three: the vision sensor (10) collects laser images on the plane of the fan (11) to be measured and obtains images, laser emitted by the laser emitter (9) is emitted on the surface of the fan (11) to be measured at a certain angle, because the surface of the fan (11) to be measured has horizontal height difference, a plurality of sections of parallel lines can appear, distances L1 and L2 between laser lines on the surfaces S1 and S2 and S1 and S3 are obtained through image processing, and then the horizontal height difference of the three planes at the Y value can be calculated according to parameters set during installation of the device;
step four: the servo motor (3) collects and processes images once when rotating for a certain angle, and establishes a characteristic diagram of the horizontal error of the fan plane, so that the horizontal error of the surface of the fan (11) to be detected can be detected and analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601403.7A CN111811416A (en) | 2020-06-28 | 2020-06-28 | Device and method for detecting height difference of plane of cooling fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601403.7A CN111811416A (en) | 2020-06-28 | 2020-06-28 | Device and method for detecting height difference of plane of cooling fan |
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| CN111811416A true CN111811416A (en) | 2020-10-23 |
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| CN202010601403.7A Pending CN111811416A (en) | 2020-06-28 | 2020-06-28 | Device and method for detecting height difference of plane of cooling fan |
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| CN105043272A (en) * | 2015-08-21 | 2015-11-11 | 天津市耀辉光电技术有限公司 | Stepped surface height difference measurement device |
| CN206258081U (en) * | 2016-12-02 | 2017-06-16 | 上海弼智仿生高科技有限公司 | A kind of 3-dimensional image measurement apparatus with real-time height calibrating function |
| CN109297436A (en) * | 2018-11-30 | 2019-02-01 | 北京伟景智能科技有限公司 | Binocular line laser measurement in space benchmark calibration method |
| CN210108267U (en) * | 2019-08-07 | 2020-02-21 | 厦门正新橡胶工业有限公司 | Rubber semi-manufactured goods width dimension on-line measuring device |
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2020
- 2020-06-28 CN CN202010601403.7A patent/CN111811416A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015059817A (en) * | 2013-09-18 | 2015-03-30 | トヨタ自動車株式会社 | Secondary battery visual inspection method and secondary battery visual inspection device |
| CN103673901A (en) * | 2013-11-22 | 2014-03-26 | 大连日佳电子有限公司 | Solder paste thickness testing method and solder paste thickness tester |
| CN104897671A (en) * | 2015-05-07 | 2015-09-09 | 北京农业智能装备技术研究中心 | Identification system for fruit stem and calyx of fruit |
| CN105043272A (en) * | 2015-08-21 | 2015-11-11 | 天津市耀辉光电技术有限公司 | Stepped surface height difference measurement device |
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| CN109297436A (en) * | 2018-11-30 | 2019-02-01 | 北京伟景智能科技有限公司 | Binocular line laser measurement in space benchmark calibration method |
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Application publication date: 20201023 |