CN111238418A - Mobile phone screen flatness detection method based on laser interference imaging - Google Patents
Mobile phone screen flatness detection method based on laser interference imaging Download PDFInfo
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- CN111238418A CN111238418A CN201910130433.1A CN201910130433A CN111238418A CN 111238418 A CN111238418 A CN 111238418A CN 201910130433 A CN201910130433 A CN 201910130433A CN 111238418 A CN111238418 A CN 111238418A
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- mobile phone
- phone screen
- motion platform
- dimensional motion
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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
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a mobile phone screen flatness detection method based on laser interference imaging, which comprises the following steps: the components are as follows: selecting a two-dimensional motion platform, an integrated optical fiber sensor, a ranging acquisition terminal and an upper computer, and placing and fixing the two-dimensional motion platform, the integrated optical fiber sensor, the ranging acquisition terminal and the upper computer at proper positions; fixing the mobile phone: and fixing the mobile phone to the two-dimensional motion platform, enabling the mobile phone screen to be parallel to the motion direction of the two-dimensional motion platform, and marking the measured position of the mobile phone screen through X, Y point coordinates. According to the mobile phone screen flatness detection method based on laser interference imaging, the upper computer can control each module, each module can work cooperatively, the measured information is used for detecting the flatness of the mobile phone screen, the measurement precision is high, the measurement speed is high, the measurement is convenient, the damage to the mobile phone screen can be avoided, the resource waste is reduced, and the use is convenient.
Description
Technical Field
The invention relates to the technical field of mobile phone detection, in particular to a mobile phone screen flatness detection method based on laser interference imaging.
Background
The mobile phone screen is also called a display screen and is used for displaying images and colors. The screen size is calculated from the screen diagonal, usually in inches, and refers to the length of the screen diagonal. The screen material is gradually popular with the color screens of mobile phones, and the material of the mobile phone screen is more and more important. The color screens of mobile phones are different due to different LCD qualities and development technologies, and the types of the color screens include TFT, TFD, UFB, STN, and OLED. Generally, the more colors that can be displayed, the more complex images can be displayed, and the more rich the gradation of the picture.
The interferometric technique is a technique based on the principle of light wave interference, and the interferometric technique and interferometer play an important role in optical measurement. Compared with the common optical imaging measurement technology, the interferometric measurement has the characteristics of wide range, high sensitivity, high precision and the like. With the emergence of laser technology and the application in the field of interferometry, the interferometry technology has been significantly improved in terms of range, resolution, interference resistance, measurement accuracy, and the like. The application fields of the modern interferometric technology from the quality control of optical parts to the image quality evaluation of optical systems, from the classical optical technology to the adaptive optical engineering are continuously expanded.
After the mobile phone screen is installed, the flatness of the mobile phone screen is generally required to be detected, the mobile phone screen is generally divided into contact measurement and non-contact measurement during measurement, the existing measurement mode is generally measurement during contact, and the screen is easily damaged to a certain extent during operation, so that the resource waste is caused, and the use is inconvenient.
Disclosure of Invention
The invention aims to overcome the existing defects and provides a mobile phone screen flatness detection method based on laser interference imaging.
In order to achieve the above object, the present invention proposes: a mobile phone screen flatness detection method based on laser interference imaging comprises the following steps:
1) the components are as follows: selecting a two-dimensional motion platform, an integrated optical fiber sensor, a ranging acquisition terminal and an upper computer, and placing and fixing the two-dimensional motion platform, the integrated optical fiber sensor, the ranging acquisition terminal and the upper computer at proper positions;
2) fixing the mobile phone: fixing the mobile phone to the two-dimensional motion platform, enabling the mobile phone screen to be parallel to the motion direction of the two-dimensional motion platform, and marking the measured position of the mobile phone screen through X, Y point coordinates;
3) debugging: the upper computer controls the two-dimensional motion platform to work, the two-dimensional motion platform drives the mobile phone to move, a fixed seat of the two-dimensional motion platform is observed and adjusted, and the moving direction of the two-dimensional motion platform is parallel to a horizontal plane where a screen of the mobile phone is located;
4) measurement: the upper computer sends an instruction to the acquisition module, the acquisition module controls the laser to output laser with linearly changing frequency, the laser can generate interference signals when passing through an interference light path and a mobile phone screen, then the acquisition module acquires interference light intensity signals and uploads the interference light intensity signals to the upper computer, and the upper computer can obtain the Z-direction distance between the sensor and a measured point through calculation;
5) the mobile phone moves: after the Z-direction distance is obtained, the upper computer reads X, Y-direction position data of the measured point at the moment, so that the spatial position of the measured point is obtained, meanwhile, the upper computer sends an instruction control to the two-dimensional motion platform, and the two-dimensional motion platform drives the mobile phone screen to move, so that the mobile phone screen moves to the next measuring point;
6) setting a region: and (3) setting a moving area of the two-dimensional moving platform according to the size of the mobile phone screen, repeating the step (4) and the step (5), measuring the spatial position information of all measuring points in the set area, and processing the information by the upper computer so as to obtain the flatness information of the mobile phone screen.
As a preferred technical scheme of the invention: in step 1, the distance measurement acquisition terminal comprises a laser light source module and an acquisition module.
Compared with the prior art, the invention has the beneficial effects that: this cell-phone screen roughness detection method based on laser interference formation of image, integrated optical fiber sensor can provide the required interference light path of measurement, the removal of surveyed cell-phone screen can be realized to the two-dimensional motion platform, the host computer can control each module, and make each module collaborative work, and utilize the roughness of the information detection cell-phone screen that measures, measurement accuracy is high, the measuring speed is fast, it is convenient to measure, and can avoid causing the damage to the cell-phone screen, reduce the waste of resource, high durability and convenient use.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides the following technical scheme: a mobile phone screen flatness detection method based on laser interference imaging comprises the following steps:
1) the components are as follows: selecting a two-dimensional motion platform, an integrated optical fiber sensor, a ranging acquisition terminal and an upper computer, and placing and fixing the two-dimensional motion platform, the integrated optical fiber sensor, the ranging acquisition terminal and the upper computer at proper positions, wherein the ranging acquisition terminal comprises a laser light source module and an acquisition module;
2) fixing the mobile phone: fixing the mobile phone to the two-dimensional motion platform, enabling the mobile phone screen to be parallel to the motion direction of the two-dimensional motion platform, and marking the measured position of the mobile phone screen through X, Y point coordinates;
3) debugging: the upper computer controls the two-dimensional motion platform to work, the two-dimensional motion platform drives the mobile phone to move, a fixed seat of the two-dimensional motion platform is observed and adjusted, and the moving direction of the two-dimensional motion platform is parallel to a horizontal plane where a screen of the mobile phone is located;
4) measurement: the upper computer sends an instruction to the acquisition module, the acquisition module controls the laser to output laser with linearly changing frequency, the laser can generate interference signals when passing through an interference light path and a mobile phone screen, then the acquisition module acquires interference light intensity signals and uploads the interference light intensity signals to the upper computer, and the upper computer can obtain the Z-direction distance between the sensor and a measured point through calculation;
5) the mobile phone moves: after the Z-direction distance is obtained, the upper computer reads X, Y-direction position data of the measured point at the moment, so that the spatial position of the measured point is obtained, meanwhile, the upper computer sends an instruction control to the two-dimensional motion platform, and the two-dimensional motion platform drives the mobile phone screen to move, so that the mobile phone screen moves to the next measuring point;
6) setting a region: and (3) setting a moving area of the two-dimensional moving platform according to the size of the mobile phone screen, repeating the step (4) and the step (5), measuring the spatial position information of all measuring points in the set area, and processing the information by the upper computer so as to obtain the flatness information of the mobile phone screen.
The invention has the advantages that: according to the mobile phone screen flatness detection method based on laser interference imaging, the integrated optical fiber sensor can provide an interference light path required by measurement, the two-dimensional motion platform can realize the movement of the mobile phone screen to be detected, the upper computer can control each module, each module can work in a cooperative mode, the flatness of the mobile phone screen is detected by utilizing the measured information, the measurement precision is high, the measurement speed is high, the measurement is convenient, the damage to the mobile phone screen can be avoided, the waste of resources is reduced, and the use is convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A mobile phone screen flatness detection method based on laser interference imaging is characterized in that: the method comprises the following steps:
1) the components are as follows: selecting a two-dimensional motion platform, an integrated optical fiber sensor, a ranging acquisition terminal and an upper computer, and placing and fixing the two-dimensional motion platform, the integrated optical fiber sensor, the ranging acquisition terminal and the upper computer at proper positions;
2) fixing the mobile phone: fixing the mobile phone to the two-dimensional motion platform, enabling the mobile phone screen to be parallel to the motion direction of the two-dimensional motion platform, and marking the measured position of the mobile phone screen through X, Y point coordinates;
3) debugging: the upper computer controls the two-dimensional motion platform to work, the two-dimensional motion platform drives the mobile phone to move, a fixed seat of the two-dimensional motion platform is observed and adjusted, and the moving direction of the two-dimensional motion platform is parallel to a horizontal plane where a screen of the mobile phone is located;
4) measurement: the upper computer sends an instruction to the acquisition module, the acquisition module controls the laser to output laser with linearly changing frequency, the laser can generate interference signals when passing through an interference light path and a mobile phone screen, then the acquisition module acquires interference light intensity signals and uploads the interference light intensity signals to the upper computer, and the upper computer can obtain the Z-direction distance between the sensor and a measured point through calculation;
5) the mobile phone moves: after the Z-direction distance is obtained, the upper computer reads X, Y-direction position data of the measured point at the moment, so that the spatial position of the measured point is obtained, meanwhile, the upper computer sends instruction control to the two-dimensional motion platform, and the two-dimensional motion platform drives the mobile phone screen to move, so that the mobile phone screen moves to the next measuring point;
6) setting a region: and (3) setting a moving area of the two-dimensional moving platform according to the size of the mobile phone screen, repeating the step (4) and the step (5), measuring the spatial position information of all measuring points in the set area, and processing the information by the upper computer so as to obtain the flatness information of the mobile phone screen.
2. The method for detecting the flatness of the screen of the mobile phone based on the laser interference imaging as claimed in claim 1, wherein: in step 1, the distance measurement acquisition terminal comprises a laser light source module and an acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910130433.1A CN111238418A (en) | 2019-02-21 | 2019-02-21 | Mobile phone screen flatness detection method based on laser interference imaging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910130433.1A CN111238418A (en) | 2019-02-21 | 2019-02-21 | Mobile phone screen flatness detection method based on laser interference imaging |
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| CN111238418A true CN111238418A (en) | 2020-06-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465539A (en) * | 2021-07-06 | 2021-10-01 | 上海大学 | Automatic cylindricity measuring device and method based on sub-aperture interference splicing |
| CN113932738A (en) * | 2021-11-15 | 2022-01-14 | 河北科技大学 | Flatness detection device is mediated with frame to non-contact electronic equipment outer screen |
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| CN106643581A (en) * | 2016-10-31 | 2017-05-10 | 佛山科学技术学院 | Glass flatness detector and detection method |
| CN108662992A (en) * | 2017-03-31 | 2018-10-16 | 均豪精密工业股份有限公司 | surface measuring method and surface measuring system |
| CN108917625A (en) * | 2018-07-27 | 2018-11-30 | 深圳中科飞测科技有限公司 | A kind of light emitting device, Systems for optical inspection and optical detecting method |
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2019
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Patent Citations (5)
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| CN102288138A (en) * | 2011-06-27 | 2011-12-21 | 上海卓晶半导体科技有限公司 | Equipment for automatically testing semiconductor substrate |
| CN104094104A (en) * | 2012-02-07 | 2014-10-08 | 肖特公开股份有限公司 | Device and method for identifying defects within the volume of a transparent pane and use of the device |
| CN106643581A (en) * | 2016-10-31 | 2017-05-10 | 佛山科学技术学院 | Glass flatness detector and detection method |
| CN108662992A (en) * | 2017-03-31 | 2018-10-16 | 均豪精密工业股份有限公司 | surface measuring method and surface measuring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113465539A (en) * | 2021-07-06 | 2021-10-01 | 上海大学 | Automatic cylindricity measuring device and method based on sub-aperture interference splicing |
| CN113465539B (en) * | 2021-07-06 | 2024-03-19 | 上海大学 | Automatic cylindricity measuring device and method based on sub-aperture interference splicing |
| CN113932738A (en) * | 2021-11-15 | 2022-01-14 | 河北科技大学 | Flatness detection device is mediated with frame to non-contact electronic equipment outer screen |
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Application publication date: 20200605 |