CN104914110B - A kind of phone housing quality detecting system - Google Patents

Abstract

The present invention relates to a kind of phone housing quality detecting system, including the detection to phone housing edge and two aspects of inspection to mobile phone shell on the back, including：Control unit, data acquisition module, two dimensional laser scanning sensor, electrically driven module, the mechanical device for detecting phone housing edge and the mechanical device for detecting mobile phone shell on the back.For detecting that the mechanical device at phone housing edge includes Mobile phone casing clamper, mobile phone shell mounting platform, fixture operating mechanism, clamp locking mechanism and base；Control unit is connected with the output end of data acquisition module and the input of electrically driven module respectively, and two dimensional laser scanning sensor is arranged on base, and its output is connected with the input of data acquisition module；Mobile phone casing clamper includes upper fixture and lower clamp, and lower clamp is fixed on mobile phone shell mounting platform.The present invention has cost relatively low, easily realizes, the high advantage of reliability.

Description

A mobile phone shell quality inspection system

【Technical field】

The invention belongs to the technical field of automatic detection and relates to a method for detecting the quality of a mobile phone casing.

【technical background】

In recent years, high-end smartphones have become more and more popular among consumers, and their market share has continued to grow. The components in many internationally renowned mobile phone products are made in China, which brings huge business opportunities to China's electronics industry. But at the same time, mobile phone manufacturers have also put forward strict requirements for the quality inspection of high-end mobile phone parts and accessories. my country's mobile phone parts manufacturers are facing huge challenges.

Taking mobile phone casings as an example, due to reasons in the manufacturing process, some products may have quality defects such as dents, scratches, bumps, and burrs on the appearance. At present, most parts manufacturers rely on manual inspection of the appearance quality of mobile phone casings, which is prone to false detection and missed detection, which brings a lot of economic losses to the manufacturers. Therefore, efficient and accurate intelligent automatic inspection devices are urgently needed. Existing intelligent devices (such as invention patent CN102218406A) that use image processing technology to detect mobile phone shells require complex pattern recognition algorithms, and some also need to install detection lenses at multiple angle positions (such as utility model CN203455286U). The method is not easy to realize, and the accuracy and precision of detection are not ideal enough.

【Content of invention】

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a simple structure, lower equipment cost, easy to implement, and an intelligent detection system for mobile phone casing appearance quality defects with high reliability, which is used to automatically realize the mobile phone casing (including the back surface of the casing) and edge) online detection of appearance quality. The technical scheme adopted in the present invention is as follows:

A mobile phone shell quality inspection system, including two aspects: detection of the edge of the mobile phone shell and inspection of the back shell of the mobile phone, wherein,

The detection system used to detect the edge of the mobile phone shell includes: a control unit, a data acquisition module, a two-dimensional laser scanning sensor, an electrical drive module, and a mechanical device for detecting the edge of the mobile phone shell;

The mechanical device for detecting the edge of the mobile phone case includes a mobile phone case clamp, a mobile phone case installation platform, a clamp operating mechanism, a clamp locking mechanism and a base; the control unit is connected with the output end of the data acquisition module and the input end of the electric drive module respectively The two-dimensional laser scanning sensor is installed on the base, and its output is connected to the input terminal of the data acquisition module; the mobile phone case fixture includes an upper fixture and a lower fixture, and the lower fixture is fixed on the mobile phone case installation platform, and the mobile phone case installation platform and fixture operation The mechanism and the fixture locking mechanism are respectively installed on the base and connected to the output end of the electric drive module; the mobile phone case to be tested is placed on the lower fixture;

The two-dimensional laser scanning sensor is installed at the same height as the horizontal center line of the edge of the mobile phone shell, and the two-dimensional laser beam it generates is perpendicular to the plane of the edge of the mobile phone shell, and is used to scan the contour of the edge of the mobile phone shell;

The working mode of the electric drive module, the mobile phone case clamp, the mobile phone case installation platform, the clamp operating mechanism, the clamp locking mechanism and the base is: (1) place the edge of the mobile phone shell to be detected on the lower clamp through the clamp operating mechanism, Then place the upper fixture above the edge of the mobile phone case; (2) use the fixture locking mechanism to make the upper and lower fixtures clamp the edge of the mobile phone case to ensure that the edge of the mobile phone case and the mobile phone case installation platform do not move relative to each other during the testing process (3) The mobile phone shell installation platform drives the edge of the mobile phone shell and the fixture to rotate during the detection process; (4) The above-mentioned processes are all implemented through the electric drive module to implement motion control, and the control commands are all generated by the control unit;

The detection system used for the detection of the mobile phone back shell includes: a control unit, a data acquisition module, a two-dimensional laser scanning sensor, an electrical drive module, and a mechanical device for detecting the quality of the mobile phone back shell. Among them,

The mechanical device for detecting the quality of the mobile phone back shell includes a mobile phone shell clamp, a clamp operating mechanism, a bracket, a guide rail, a moving mechanism and a base; the control unit is connected to the output end of the data acquisition module and the input end of the electric drive module respectively , the output end of the two-dimensional laser scanning sensor is connected to the input end of the data acquisition module; the moving mechanism is connected to the output end of the electric drive module, the bracket is fixed on the base, the guide rail is fixed on the bracket, and the guide rail is provided with a moving mechanism; the fixture is operated The mechanism is fixed on the bracket, and the moving mechanism and the clamp operating mechanism are respectively connected to the output end of the electric drive module; the mobile phone shell clamp includes an upper clamp and a lower clamp, and the lower clamp is fixed on the base. After the mobile phone shell is clamped, the back shell is facing The laser head of the two-dimensional laser scanning sensor;

The two-dimensional laser scanning sensor is fixed on the mobile mechanism, and the two-dimensional laser beam generated by it is perpendicular to the back shell of the mobile phone and can cover the entire back shell of the mobile phone under test;

The working mode of the described electrical drive module, mobile phone shell clamp, clamp operating mechanism, guide rail and moving mechanism is: (1) the mobile phone shell to be tested is placed on the mobile phone shell clamp by the clamp operating mechanism; (2) during the detection process , the moving mechanism drives the two-position laser sensor to move on the guide rail; (3) the above-mentioned processes are all controlled by the electric drive module, and the control commands are all generated by the control unit.

The invention proposes an intelligent device for detecting appearance quality defects of a mobile phone shell (back) and edge (side) by using a two-dimensional laser scanning sensor, which is used to replace manual detection. Supplemented by the corresponding detection software, the appearance quality defects of the mobile phone shell can be detected online, so as to improve the automation level of product detection and effectively reduce the manufacturing cost of the product.

【Description of drawings】

Fig. 1 is a hardware composition diagram of a detection device for detecting the edge of a mobile phone casing;

Fig. 2 is a front view of the hardware composition diagram of the detection device for detecting the back shell of the mobile phone;

Fig. 3 is a side view of the hardware composition diagram of the detection device for detecting the back shell of the mobile phone;

FIG. 4 is a composition diagram of each data frame collected by the two-dimensional laser sensor in the entire array.

Fig. 5 is a contour curve diagram of dents and convex marks appearing on the edge of the mobile phone shell, (a) is a dent and (b) is a convex mark;

Fig. 6 is a contour graph of dents and convex marks on the back of the mobile phone casing, (a) is a dent and (b) is a convex mark.

The accompanying drawings are as follows:

1 Two-dimensional laser sensor 2 Base 3 Upper fixture 4 Lower fixture 5 Fixture operating mechanism 6 Fixture locking mechanism 7 Mobile phone shell installation platform 8 Fixture 9 Bracket 10 Guide rail 11 Moving mechanism

【detailed description】

The present invention will be described in further detail below in conjunction with specific embodiments.

The detection device used to detect the edge of the mobile phone shell as shown in Figure 1 is used to intelligently detect the appearance quality of the edge of the mobile phone shell, including a control unit, a data acquisition module, a two-dimensional laser scanning sensor, an electrical drive module and a mobile phone shell Clamp, mobile phone shell installation platform 7, clamp manipulation mechanism 5, clamp locking mechanism 6 and base 2.

The two-dimensional laser scanning sensor is installed on the base 2, and its output end is connected with the input end of the data acquisition module, which is used to scan the contour data of the edge of the mobile phone case and transmit it to the data acquisition module. The installation method is that the two-dimensional laser scanning sensor is installed at a position equal to the horizontal centerline of the edge of the mobile phone casing, and the two-dimensional laser beam generated is perpendicular to the plane of the edge of the mobile phone casing.

The data acquisition module is used to receive the mobile phone shell profile data transmitted by the two-dimensional laser scanning sensor and transmit it to the control unit for data processing; the electric drive module includes servo motors, transmission mechanisms and motion control modules, etc., and is used to control the mobile phone shell fixture to move the mobile phone The case is clamped and fixed on the mobile phone case installation platform 7, and the mobile phone case installation platform 7 is controlled to drive the fixture and the mobile phone case to rotate at a constant speed.

The mobile phone shell fixture includes an upper fixture and a lower fixture, which are used to clamp the tested mobile phone shell during the testing process. Wherein, the lower clamp is fixed on the mobile phone shell installation platform 7, and the upper clamp and the clamp locking mechanism 6 can be controlled by the clamp operating mechanism, and together with the lower clamp, the tested mobile phone shell is fixed on the mobile phone shell installation platform 7. The mobile phone shell installation platform 7, the clamp operating mechanism and the clamp locking mechanism 6 are installed on the base 2 respectively, and are connected with the output end of the electric drive module.

The working mode of the electric drive module, the mobile phone case clamp, the mobile phone case installation platform 7, the clamp operating mechanism 5, the clamp locking mechanism 6 and the base 2 is: 1) the mobile phone case to be tested is placed on the lower clamp through the clamp operating mechanism 5, Then the upper clamp is placed on the top of the mobile phone shell; 2) the upper and lower clamps clamp the mobile phone shell through the clamp locking mechanism 6, so as to ensure that the mobile phone shell and the installation platform do not move relative to each other during the detection process; 3) the installation platform is on During the detection process, the mobile phone casing and the fixture are driven to rotate at a constant speed; 4) The above-mentioned processes are all controlled by the electric drive module, and the control commands are all generated by the control unit.

The control unit is connected to the output end of the data acquisition module and the input end of the electric drive module respectively, and its function is: 1) the mobile phone case to be detected is fixed on the mobile phone case by controlling the clamp manipulation mechanism 5 and the clamp locking mechanism 6 through the electric drive module On the installation platform 7; 2) During the detection process, the mobile phone shell installation platform 7 is controlled by the electric drive module to drive the tested mobile phone shell to rotate at a constant speed, and in this process, the two-dimensional laser scanning sensor is controlled to collect the contour data of the edge of the mobile phone shell; 3) The control data acquisition module receives the data from the two-dimensional laser scanning sensor and stores it in a two-dimensional array; 4) Runs the data processing and detection algorithm, and judges the appearance of the mobile phone case according to the shell quality inspection standard provided by the mobile phone manufacturer Whether the quality is qualified.

The detection device used to detect the back of the mobile phone shell as shown in Figure 2 and Figure 3 is used to implement intelligent detection of the appearance quality of the back of the mobile phone shell, including a control unit, a data acquisition module, a two-dimensional laser scanning sensor, and an electrical drive module And the mobile phone case clamp, the clamp manipulation mechanism 5, the support 9, the guide rail 10, the moving mechanism and the base 2.

The two-dimensional laser scanning sensor is installed on the mobile mechanism and connected to the input end of the data acquisition module, used to scan the contour data on the back of the mobile phone shell and transmit it to the data acquisition module. It is installed in such a way that the two-dimensional laser beam generated is perpendicular to the plane of the back of the mobile phone casing and can cover the entire back of the tested mobile phone casing. The guide rail 10 is installed in such a way that it is located directly above the back of the tested mobile phone shell and parallel to the center line of the tested mobile phone shell back.

The data acquisition module is used to receive the contour data of the back of the mobile phone shell transmitted by the two-dimensional laser scanning sensor and transmit it to the control unit for data processing; the electric drive module includes servo motors, transmission mechanisms and their motion control modules, etc., and is used to control the fixture manipulation mechanism 5 Install the back of the mobile phone case under test on the mobile phone case fixture.

The mode of operation of described electrical drive module, mobile phone shell clamp, clamp operating mechanism 5, guide rail 10 and moving mechanism is: (1) the mobile phone shell to be detected is placed on the mobile phone shell clamp by clamp operating mechanism 5; (2) During the detection process, the moving mechanism drives the two-position laser sensor to move laterally on the guide rail 10; (3) the above-mentioned processes are all controlled by the electric drive module, and the control commands are all generated by the control unit.

The control unit is respectively connected to the output end of the data acquisition module and the input end of the electric drive module, and its functions are: 1) the back of the mobile phone shell is fixed on the mobile phone shell fixture by controlling the clamp manipulation mechanism 5 through the electric drive module; 2) during the detection process In the process, the moving mechanism is controlled by the electric drive module to drive the two-dimensional laser sensor 1 to translate at a constant speed, and in the process, the two-dimensional laser scanning sensor is controlled to collect the contour data on the back of the mobile phone shell; The data of the sensor is stored in a two-dimensional array; 4) Run the data processing and detection algorithm, and judge whether the appearance quality of the mobile phone case is qualified according to the shell quality inspection standard provided by the mobile phone manufacturer.

As shown in Figure 4, a frame of data curves on the edge of the mobile phone case is obtained by the two-dimensional laser sensor 1 during a sampling cycle when the mobile phone case mounting platform 7 drives the mobile phone case fixture and the tested mobile phone case to rotate at a uniform speed. the collected data. The data curve includes the edge part of the mobile phone case, the fixture part of the mobile phone case and other parts. After the control unit receives the frame of data, it needs to perform a preprocessing function, and only keep the data that reflects the contour curve of the edge of the mobile phone shell, and store it in the corresponding column in the two-dimensional array.

The two-dimensional array shown in Figure 4 is a combination of data representing the outline of the mobile phone case in all data frames, and the data corresponding to each frame is stored in a column of the two-dimensional array. The data in each column is arranged in order of acquisition time, that is, the data of the first frame is arranged in the first column, and so on. n is the total number of sampling frames for one rotation of the edge of the mobile phone shell, and the sampling period of the two-dimensional laser sensor 1 can be set by setting the value of n.

Figure 5 shows the contour curves of dents and bulges on the edge of the mobile phone case. The detection algorithm takes the ideal mobile phone case contour curve as a reference, and uses the measured data of the part of the mobile phone case where dents or bulges appear in the contour curve of the mobile phone Extract it, calculate the area and depth or height of the dent or convex mark, and then judge whether the appearance quality of the mobile phone case is qualified according to the shell quality inspection standard provided by the mobile phone manufacturer.

Figure 6 is a contour curve diagram of dents and convex marks on the back of the mobile phone case. The detection algorithm takes the ideal mobile phone case contour curve as a reference, and extracts the data of the part where the dents or convex marks appear in the contour curve of the mobile phone case obtained by actual measurement. Calculate the area and depth or height of the dent or convex mark, and then judge whether the appearance quality of the mobile phone case is qualified according to the shell quality inspection standard provided by the mobile phone manufacturer.

To sum up, the automatic detection process for the appearance quality of the edge of the mobile phone shell is realized through the following steps: 1) The control unit sends an instruction to the electric drive module to make it control the clamp manipulation mechanism 5 to place the edge of the mobile phone shell to be tested on the lower fixture Then place the upper fixture above the edge of the mobile phone shell, and use the clamp locking mechanism 6 to make the upper and lower clamps clamp the edge of the mobile phone shell; 2) The control unit sends instructions to the electric drive module to make it control the mobile phone shell installation platform 7 drives the fixture and the mobile phone case to rotate at a constant speed; 3) during the process of the mobile phone case installation platform 7 driving the fixture and the mobile phone case to rotate at a constant speed, the control unit sends instructions to the two-dimensional laser scanning sensor to make it scan the side surface of the edge of the mobile phone case The contour is scanned for data; 3) The control unit sends instructions to the data acquisition module to make it receive the mobile phone case contour data from the two-dimensional laser scanning sensor in real time and transmit it to the control unit; 4) The control unit receives the complete mobile phone case contour data Finally, run the corresponding data processing and detection algorithm, and judge whether the appearance quality of the mobile phone case is qualified according to the detection result.

The data processing method used to detect the appearance quality of the edge of the mobile phone shell is: 1) the control unit creates a new two-dimensional array for storing the edge contour data of the mobile phone shell; 2) performs data pre-processing for each data frame collected. Processing, only keep the contour data of the edge part of the mobile phone shell, and store these data in a certain column in a two-dimensional array, and the storage positions are arranged according to the order of acquisition time, until the collection of all data frames is completed, so that the fixture and the mobile phone shell All the data collected during the edge rotation at a constant speed are combined to form a complete edge contour curve of the mobile phone case; 3) Calculate the roughness data of the edge contour curve of the mobile phone case, and judge the appearance of the mobile phone case according to the shell quality inspection standard provided by the mobile phone manufacturer Whether the quality is qualified.

The data processing method used to detect the appearance quality of the back of the mobile phone shell is: 1) the control unit creates a new two-dimensional array for storing the contour data of the back of the mobile phone shell; 2) performs data pre-processing on each data frame collected. Processing, only keep the contour data of the back part of the mobile phone shell, and store these data in a certain column in a two-dimensional array, and the storage positions are arranged in order according to the collection time until the collection of all data frames is completed, so that the mobile mechanism drives the two All the data collected by the three-dimensional laser sensor 1 during the translation process along the guide rail 10 form a complete mobile phone shell back profile curve; 3) calculate the roughness data of the mobile phone shell back profile curve, according to the shell quality inspection standard provided by the mobile phone manufacturer , to determine whether the appearance quality of the back of the mobile phone shell is qualified.

The automatic detection process for the appearance quality of the back of the mobile phone shell is realized through the following steps: 1) the control unit sends an instruction to the electric drive module to make it control the clamp operating mechanism 5 to place the back of the mobile phone shell to be tested on the mobile phone shell fixture, Ensure that it does not move during the detection process; 2) The control unit sends instructions to the electric drive module, so that it controls the moving mechanism to drive the two-dimensional laser sensor 1 to move at a constant speed along the guide rail 10; 3) Drive the two-dimensional laser sensor on the moving mechanism 1. In the process of translation along the guide rail 10, the control unit sends an instruction to the two-dimensional laser scanning sensor to scan the data on the contour of the back of the mobile phone case; 3) The control unit sends an instruction to the data acquisition module so that it can receive data from the data acquisition module in real time. The contour data of the back of the mobile phone case is scanned by the two-dimensional laser sensor and transmitted to the control unit; 4) After the control unit receives the complete contour data of the back of the mobile phone case, it runs the corresponding data processing and detection algorithm, and judges the back of the mobile phone case according to the detection results. Whether the appearance quality is qualified.

The roughness detection method adopted for the profile data of the tested mobile phone shell is as follows: 1) Taking the ideal mobile phone shell profile curve as a reference, the data of the dent part in the measured mobile phone shell profile curve is extracted, and the dent is calculated. Area and depth, and then judge whether the appearance quality of the mobile phone case is qualified according to the shell quality inspection standard provided by the mobile phone manufacturer; Extract the data, calculate the area and height of the convex mark, and then judge whether the appearance quality of the mobile phone case is qualified according to the shell quality inspection standard provided by the mobile phone manufacturer.

Claims (1)

1. a kind of phone housing quality detecting system, including the detection to phone housing edge and the inspection two to mobile phone shell on the back Aspect, wherein,

The detecting system that detection to phone housing edge is used includes：Control unit, data acquisition module, two-dimensional laser are swept Sensor, electrically driven module and the mechanical device for detecting phone housing edge are retouched, wherein,

The described mechanical device for being used to detect phone housing edge includes Mobile phone casing clamper, mobile phone shell mounting platform, fixture behaviour Vertical mechanism, clamp locking mechanism and base；Control unit respectively with the output end of data acquisition module and electrically driven module Input is connected, and two dimensional laser scanning sensor is arranged on base, and its output is connected with the input of data acquisition module；Hand Casing fixture includes upper fixture and lower clamp, and lower clamp is fixed on mobile phone shell mounting platform, mobile phone shell mounting platform, fixture behaviour Make mechanism and clamp locking mechanism is separately mounted on base, and be connected with the output end of electrically driven module；Hand to be detected Machine shell is placed on lower clamp；

Described two dimensional laser scanning sensor, installed in the position contour with phone housing edge horizontal center line, it is produced Raw two-dimensional laser beam is vertical with the plane at phone housing edge, the profile for scanning cell phone shell edge；

Described electrically driven module, Mobile phone casing clamper, mobile phone shell mounting platform, fixture operating mechanism, clamp locking mechanism and The working method of base is：(1) phone housing edge to be detected is placed on lower clamp by fixture operating mechanism, then will Upper fixture is placed in above phone housing edge；(2) upper fixture, lower clamp are made by phone housing edge by clamp locking mechanism Clamp, to ensure that phone housing edge is not relatively moved with mobile phone shell mounting platform in detection process；(3) mobile phone shell is pacified Assembling platform drives phone housing edge and fixture to rotate in detection process；(4) said process by electrically driven module come Implement motion control, its control instruction is produced by control unit；

The detecting system that detection to mobile phone shell on the back is used includes：Control unit, data acquisition module, two dimensional laser scanning are passed Sensor, electrically driven module and the mechanical device for detecting cell phone back shell quality testing, wherein,

The described mechanical device for being used to detecting cell phone back shell quality testing include Mobile phone casing clamper, fixture operating mechanism, support, Guide rail, travel mechanism and base；The output end and the input of electrically driven module of control unit respectively with data acquisition module It is connected, the output end of two dimensional laser scanning sensor is connected with the input of data acquisition module；Travel mechanism with it is electrically driven The output end of module is connected, and support is fixed on base, and guide rail is fixed on support, and travel mechanism is provided with guide rail；Fixture Operating mechanism is fixed on support, and the output end of travel mechanism and fixture operating mechanism respectively with electrically driven module is connected；Hand Casing fixture includes upper fixture and lower clamp, and lower clamp is fixed on base, after phone housing is clamped, and shell on the back just swashs to two dimension The laser head of optical scanning sensor；

Described two dimensional laser scanning sensor is fixed in travel mechanism, and the two-dimensional laser beam produced by it hangs down with mobile phone shell on the back Directly, and entirely tested mobile phone shell on the back can be covered；

Described electrically driven module, Mobile phone casing clamper, fixture operating mechanism, guide rail and the working method of travel mechanism be：(1) Phone housing to be detected is placed on Mobile phone casing clamper by fixture operating mechanism；(2) in detection process, travel mechanism's band Two laser sensors are moved to move on guide rail；(3) said process implements motion control by electrically driven module, and it is controlled System instruction is produced by control unit.