CN113203682A - A lid surface defect automatic monitoring device behind cell phone case for assembly line - Google Patents
A lid surface defect automatic monitoring device behind cell phone case for assembly line Download PDFInfo
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- CN113203682A CN113203682A CN202110540586.0A CN202110540586A CN113203682A CN 113203682 A CN113203682 A CN 113203682A CN 202110540586 A CN202110540586 A CN 202110540586A CN 113203682 A CN113203682 A CN 113203682A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention relates to the technical field of automatic detection and intelligent production lines, in particular to an automatic monitoring device for surface defects of a rear cover of a mobile phone shell for a production line. The invention has the advantages of high detection efficiency, low required labor cost, high detection and classification precision and the like. The device comprises a two-degree-of-freedom moving device, a customized mobile phone clamp, lighting equipment and imaging equipment, wherein the customized mobile phone clamp is arranged on the two-degree-of-freedom moving device, and the lighting equipment and the imaging equipment are arranged above the customized mobile phone clamp. The two-degree-of-freedom moving device comprises an X-axis sliding assembly and a Y-axis sliding assembly, and the X-axis sliding assembly and the Y-axis sliding assembly respectively drive the customized mobile phone clamp to move in the X-axis direction and the Y-axis direction. The Y-axis sliding assembly comprises a Y-axis stepping driving motor, a Y-axis sliding groove, a Y-axis screw rod, a Y-axis sliding block, a Y-axis sliding rail, a Y-axis motor reducer and a customized mobile phone clamp threaded fastener.
Description
Technical Field
The invention relates to the technical field of automatic detection and intelligent production lines, in particular to an automatic monitoring device for surface defects of a rear cover of a mobile phone shell for a production line.
Background
The mobile phone shell rear cover refers to a covering part which is arranged at the rear part of a common smart phone and plays a role in protection and beauty. Generally made of surface-treated metal, glass or ceramic, and surface-treated and plated plastic, which can be classified into two categories of a frosted diffuse reflection phone back cover and a multi-layer streamer specular reflection phone back cover in terms of illumination characteristics. The mainstream rear covers produced in the market at present are glass rear covers with good texture, electroplated plastic rear covers which are easy to color and low in cost and multi-component combined rear covers formed by combining the two materials, and are characterized in that under the irradiation of a light source, imaging and reflection with different colors, different patterns and even different textures can be carried out according to different sight angles.
The mobile phone shell rear cover quality inspection refers to the operation of carrying out one-by-one surface defect inspection on newly produced products in the production process of a workshop assembly line, classifying and eliminating the newly produced products according to different surface defect conditions and defect types, and the like. At present, in the production of an assembly line, the quality detection of the surface defects of the mobile phone is mainly realized by manually observing the surface defects one by means of certain auxiliary tools and the like. For the rear cover of the mobile phone shell with the characteristics of imaging and reflection of different colors, different patterns and even different textures according to different sight angles under the irradiation of a light source, the method can face the problems of small visual range caused by light, difficulty in finding defects or error and forgetting, and cannot effectively realize the efficient detection of surface damage.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the automatic monitoring device for the surface defects of the rear cover of the mobile phone shell for the production line, and the automatic monitoring device has the advantages of high detection efficiency, low required labor cost, high detection and classification precision and the like.
The device comprises a two-degree-of-freedom moving device, a customized mobile phone clamp, lighting equipment and imaging equipment, wherein the customized mobile phone clamp is arranged on the two-degree-of-freedom moving device, and the lighting equipment and the imaging equipment are arranged above the customized mobile phone clamp.
The two-degree-of-freedom moving device comprises an X-axis sliding assembly and a Y-axis sliding assembly, and the X-axis sliding assembly and the Y-axis sliding assembly respectively drive the customized mobile phone clamp to move in the X-axis direction and the Y-axis direction.
Y axle slip subassembly includes Y axle step-by-step driving motor, Y axle spout, Y axle lead screw, Y axle slider, Y axle slide rail, Y axle motor reduction gear and customization cell-phone anchor clamps threaded fastener, the customization cell-phone anchor clamps are fixed on Y axle slider through customization cell-phone anchor clamps threaded fastener, be provided with Y axle spout on the Y axle slide rail, Y axle slider sliding connection is on Y axle spout, be provided with Y axle motor reduction gear on the Y axle step-by-step driving motor, Y axle step-by-step driving motor sets up on Y axle slide rail, fixedly connected with Y axle lead screw on Y axle step-by-step driving motor's the output shaft, Y axle lead screw cooperatees through screw and Y axle slider.
X axle slip subassembly includes X axle step drive motor, X axle spout, X axle lead screw, X axle slider, X axle slide rail and X axle motor reduction gear, be provided with X axle spout on the X axle slide rail, sliding connection has X axle slider on the X axle spout, be provided with X axle motor reduction gear on the X axle step drive motor, fixedly connected with X axle lead screw on X axle step drive motor's the output shaft, X axle lead screw passes through screw-thread fit with X axle slider, Y axle slide rail fixed connection is on the upper portion of X axle slider, Y axle slide rail sets up with X axle slide rail is perpendicular.
The X-axis sliding rail is fixedly connected to the bottom plate, the main support column is vertically and fixedly connected to the bottom plate, the first connecting piece and the second connecting piece are both slidably connected to the main support column, the first connecting piece and the second connecting piece are both fixed to the main support column in a screw pressing mode, the first support rod and the second support rod are respectively inserted into the first connecting piece and the second connecting piece, the first support rod is fixed to the first connecting piece in a screw pressing mode, the second support rod is fixed to the second connecting piece in a screw pressing mode, the imaging equipment connecting piece is fixed to the end portion of the first support rod through an adjusting bolt, and the industrial camera CMOS is fixed to the imaging equipment connecting piece, the industrial camera lens is arranged on the industrial camera CMOS, the lighting device adjuster is fixedly connected to the end portion of the second supporting rod, and a lighting device light source is arranged on the lighting device adjuster.
The automatic monitoring device for the surface defects of the rear cover of the mobile phone shell for the assembly line further comprises a two-degree-of-freedom moving device control circuit, and the two-degree-of-freedom moving device control circuit controls the two-degree-of-freedom moving device.
The automatic monitoring device for the surface defects of the rear cover of the mobile phone shell for the assembly line further comprises a lighting device control circuit and an adjusting switch, wherein the lighting device control circuit and the adjusting switch are both used for controlling a lighting device and an imaging device.
LED lamp beads used as element light sources of the lighting device light source are slightly inclined towards the central axis of the circular ring so as to increase the brightness of the lighting center, and frosted glass or frosted transparent plastic is adopted on a shade of the LED lamp bead group of the lighting device light source so as to reduce the mirror reflection of the light source.
The control circuit and the regulating switch of the lighting device are integrated inside the lighting device light source, and the shell of the lighting device light source is opened for heat dissipation.
The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line has the advantages that:
the invention relates to an automatic monitoring device for surface defects of a rear cover of a mobile phone shell for a production line, which can realize bearing and positioning of a mobile phone by aiming at customized mobile phone clamps of different models, can realize stable motion of a specified path on a plane on the surface of the mobile phone by a two-degree-of-freedom sliding translation platform formed by combining an X-axis sliding component and a Y-axis sliding component, realizes reasonable illumination of the rear cover of the mobile phone shell and avoids influence of shadow and reflection on the visual field by a base, a support and a reasonable illumination device, forms a light path, is focused and imaged on an industrial camera CMOS through an industrial camera lens, converts the light path into a digital signal through a corresponding circuit and outputs the digital signal, transmits the signal to an IO interface of an upper computer through a USB cable and stores the digital signal in an IO interface register of the upper computer, and the upper computer communicates with the IO interface through an IO bus to acquire information registered on the USB bus in time, processing the data after the communication is finished to obtain an image file to be analyzed, wherein the image processing mode of the image to be analyzed is upper computer software carrying an image processing module by adopting an industrial personal computer, the software comprises an image processing interactive interface, a deep learning algorithm, a database and a communication module, the acquired image can be subjected to defect detection by using the deep learning algorithm, and the defect information is fed back to a user, the deep learning algorithm is developed by using a Google open source deep learning system TensorFlow, and is accelerated by using a Yingwei GPU, the position of a two-degree-of-freedom sliding table can be timely fed back and corrected by a zero-position sensor in the process of controlling the stable motion of a specified path on the plane of the surface of the mobile phone, the automatic reset is realized, and the work of moving to the initial placing position of the mobile phone and the final taking-out position is realized, the zero position sensor determines whether the position of the sliding block is coincident with the position of the sensor through an infrared distance sensor, the zero position sensor is fixed on a zero position set on the outer side of a side panel of the sliding chute through a customized mobile phone clamp threaded fastener, a sensor probe points to the movement track direction of the sliding block on the screw rod, when the sliding block moves to be coincident with the detection direction of the sliding block, the sensor sends a digital signal to the controller for communication so as to inform the sliding block to move to the zero position, the zero position set by the sensor can be uniquely determined by controlling the movement of the sliding block through the controller, so that the artificial zero position relative to the detection of coordinates can be determined according to the zero position set by the sensor, the artificial zero position is set in the middle of the XY-direction double-freedom-degree sliding assembly, the zero position of the sensor is determined firstly during each detection, then the relative unidirectional displacement is performed, and the zero position of the sensor can be corrected once again when the sliding block moves to the zero position of the sensor, so as to avoid position coordinate deviation caused by control precision error, manufacturing precision error and programming path planning error during multiple reciprocating motions.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of the overall structure of a device for automatically monitoring surface defects of a rear cover of a mobile phone shell for an assembly line in accordance with the present invention;
fig. 2 is a schematic structural diagram of a two-degree-of-freedom mobile device and customized handset grips 1-4.
In the figure: a bottom plate 1-1; an X-axis slide assembly 1-2; a Y-axis slide assembly 1-3; customizing a mobile phone clamp 1-4; 1-5 of main supporting columns; a first support bar 1-6; a first support bar 1-7; industrial camera CMOS 1-8; industrial camera lenses 1-9; lighting device regulators 1-10; imaging device connections 1-11; a first connecting member 1-12; second connecting members 1 to 13; a Y-axis stepping drive motor 2-1; an X-axis stepping drive motor 2-2; an X-axis chute 2-3; 2-4 of Y-axis sliding chutes; 2-5 of Y-axis screw rods; 2-6X-axis lead screws; 2-8 parts of an X-axis sliding block; 2-9 of Y-axis slide block; 2-12Y-axis slide rails; 2-13X-axis slide rails; 2-14 of an X-axis motor reducer; 2-15 of a Y-axis motor reducer; customizing handset fixture threaded fasteners 2-18.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The following describes the present embodiment with reference to fig. 1-2, and the device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line includes a two-degree-of-freedom moving device, a customized mobile phone clamp 1-4, an illumination device and an imaging device, where the customized mobile phone clamp 1-4 is disposed on the two-degree-of-freedom moving device, and the illumination device and the imaging device are disposed above the customized mobile phone clamp 1-4.
The two-degree-of-freedom moving device is used for moving the customized mobile phone clamp 1-4 in the X-axis direction and the Y-axis direction, the illuminating device is used for illuminating the rear cover of the mobile phone shell, and the imaging device is used for detecting surface damage of the rear cover of the mobile phone shell.
The customized mobile phone clamp 1-4 determines the unique position of the mobile phone through three-plane positioning, and the specific positioning method comprises the following steps: when the screen of the mobile phone faces downwards, the surface is overlapped with the bottom surface of a customized mobile phone clamp 1-4 in parallel, the translational degree of freedom in the direction of a Z axis of the fixed mobile phone, the rotational degree of freedom in the direction of an X axis and the rotational degree of freedom in the direction of a Y axis are fixed, the translational degree of freedom in the direction of a Y axis of the fixed mobile phone and the rotational degree of freedom in the direction of the Z axis are parallel and tangent, the translational degree of freedom in the direction of the X axis and the rotational degree of freedom in the direction of the Z axis are fixed, so that the six degrees of freedom are completely fixed, the mobile phone realizes complete positioning and uniquely determines the position relation with the customized mobile phone clamp, the customized mobile phone clamp 1-4 is produced by light-weight plastics and is designed to be detachable, and the fixed and separated with a sliding block of an XY two-plane motion sliding table through a threaded fastener, when the mobile phones of different models and sizes need to be detected, different mobile phones can be positioned by replacing parts of the customized mobile phone clamp 2-7, and the design of the customized mobile phone clamp 2-7 follows the following principle: by controlling the distance from the long side surface and the short side surface of the customized mobile phone clamp 2-7 to the center of the bottom surface threaded fastener, 1) the mobile phone is ensured to be completely positioned, and then the center of the mobile phone can be coincided with the center of the bottom surface threaded fastener on an XY coordinate plane; 2) the mobile phone can be ensured to complete the imaging of all parts of the mobile phone in the limit range of the motion of the XY two-degree-of-freedom plane motion sliding table after being completely positioned, namely all areas of the mobile phone can be ensured to fall into the imaging range of the upper industrial camera in the limit range of the motion of the XY two-degree-of-freedom plane motion sliding table.
The two-degree-of-freedom moving device comprises an X-axis sliding assembly 1-2 and a Y-axis sliding assembly 1-3, wherein the X-axis sliding assembly 1-2 and the Y-axis sliding assembly 1-3 respectively drive a customized mobile phone clamp 1-4 to move in the X-axis direction and the Y-axis direction.
Referring to fig. 1-2, the embodiment will be described, wherein the Y-axis sliding assembly 1-3 comprises a Y-axis stepping driving motor 2-1, a Y-axis sliding slot 2-4, a Y-axis lead screw 2-5, a Y-axis sliding block 2-9, a Y-axis sliding rail 2-12, a Y-axis motor reducer 2-15 and a customized mobile phone clamp threaded fastener 2-18, the customized mobile phone clamp 1-4 is fixed on the Y-axis sliding block 2-9 through the customized mobile phone clamp threaded fastener 2-18, the Y-axis sliding rail 2-12 is provided with the Y-axis sliding slot 2-4, the Y-axis sliding block 2-9 is slidably connected on the Y-axis sliding slot 2-4, the Y-axis stepping driving motor 2-1 is provided with the Y-axis motor reducer 2-15, the Y-axis stepping driving motor 2-1 is arranged on the Y-axis sliding rail 2-12, an output shaft of the Y-axis stepping driving motor 2-1 is fixedly connected with a Y-axis screw rod 2-5, and the Y-axis screw rod 2-5 is matched with a Y-axis sliding block 2-9 through threads. The Y-axis stepping driving motor 2-1 drives the Y-axis lead screw 2-5 to rotate by taking the axis of the Y-axis lead screw as the axis, and further drives the Y-axis sliding block 2-9 to slide on the Y-axis sliding groove 2-4, and further the Y-axis position of the customized mobile phone clamp 1-4 is adjusted.
The embodiment is described below with reference to fig. 1-2, the X-axis sliding assembly 1-2 includes an X-axis stepping driving motor 2-2, an X-axis sliding slot 2-3, an X-axis lead screw 2-6, an X-axis sliding block 2-8, an X-axis sliding rail 2-13 and an X-axis motor reducer 2-14, the X-axis sliding slot 2-3 is disposed on the X-axis sliding rail 2-13, the X-axis sliding block 2-8 is slidably connected on the X-axis sliding slot 2-3, the X-axis stepping driving motor 2-2 is disposed on the X-axis motor reducer 2-14, the X-axis lead screw 2-6 is fixedly connected on an output shaft of the X-axis stepping driving motor 2-2, the X-axis lead screw 2-6 is in threaded fit with the X-axis sliding block 2-8, the Y-axis sliding rail 2-12 is fixedly connected on an upper portion of the X-axis sliding block 2-8, the Y-axis slide rail 2-12 is vertical to the X-axis slide rail 2-13.
The X-axis stepping driving motor 2-2 drives the X-axis lead screw 2-6 to rotate by taking the axis of the X-axis lead screw as the axis, and further drives the X-axis sliding block 2-8 to slide on the X-axis sliding groove 2-3, and further the X-axis position of the customized mobile phone clamp 1-4 is adjusted.
The embodiment is described below with reference to fig. 1-2, and an automatic monitoring device for surface defects of a rear cover of a mobile phone case for an assembly line further includes a bottom plate 1-1, a main support column 1-5, a first support rod 1-6, a second support rod 1-7, an industrial camera CMOS1-8, an industrial camera lens 1-9, a lighting device adjuster 1-10, an imaging device connector 1-11, a first connector 1-12, and a second connector 1-13, an X-axis slide rail 2-13 is fixedly connected to the bottom plate 1-1, the main support column 1-5 is vertically fixedly connected to the bottom plate 1-1, the first connector 1-12 and the second connector 1-13 are both slidably connected to the main support column 1-5, the first connector 1-12 and the second connector 1-13 are both fixed to the main support column 1-5 by means of screw compression, the first supporting rod 1-6 and the second supporting rod 1-7 are respectively inserted into the first connecting piece 1-12 and the second connecting piece 1-13, the first supporting rod 1-6 is fixed on the first connecting piece 1-12 in a screw compression mode, the second supporting rod 1-7 is fixed on the second connecting piece 1-13 in a screw compression mode, the imaging device connecting piece 1-11 is fixed at the end part of the first supporting rod 1-6 through an adjusting bolt, the industrial camera CMOS1-8 is fixed on the imaging device connecting piece 1-11, the industrial camera lens 1-9 is arranged on the industrial camera CMOS1-8, the lighting device adjuster 1-10 is fixedly connected at the end part of the second supporting rod 1-7, and the lighting device adjuster 1-10 is provided with a lighting device light source. The industrial camera lenses 1-9 are connected with the industrial camera CMOS1-8 through threads, the optical center light path is intersected with the center of the industrial camera CMOS1-8 sensor, and the adjustment of focal length and light transmission amount is realized by adjusting the physical positions of lenses, diaphragms and the like in the lenses and the light transmission characteristics, so that clear imaging is realized.
The first connecting piece 1-12 and the second connecting piece 1-13 can slide on the main supporting column 1-5 to adjust the height, so that the heights of the first supporting rod 1-6 and the second supporting rod 1-7 are adjusted, and further the heights of the industrial camera CMOS1-8, the industrial camera lens 1-9, the lighting device adjuster 1-10 and the lighting device light source are adjusted.
The bottom plate 1-1 is fixed with the rubber foot pad through glue, plays a role in buffering unbalanced load and can adapt to different surfaces, and finally effective support for all components on the upper portion is achieved.
A threaded hole is reserved on the bottom plate 1-1 for realizing the effective fixation of the main support column 1-5 and supporting all the components on the main support column 1-5 and the upper part thereof, and a locking rubber ring is added on a contact part to prevent the main support column 1-5 and the upper part thereof from loosening caused by the influence of shaking and the like, the top of the main support column 1-5 is provided with a first connecting piece 1-12 and a second connecting piece 1-13, enough installation and adjustment space needs to be reserved between the first connecting piece 1-12 and the second connecting piece 1-13, one end through holes of the first connecting piece 1-12 and the second connecting piece 1-13 are in clearance fit with the main support column 1-5, and the lower parts of the first connecting piece 1-12 and the second connecting piece 1-13 are kept, the other through hole of the first connecting piece 1-12 is also in clearance fit with the first support rod 1-6, and the reserved threaded holes on the two through holes of the first connecting pieces 1-12 are screwed by using studs after the size and the angle are adjusted, so as to adjust and fix the relative position and angle between the second supporting rod 1-7 and the main supporting column 1-5, the other through hole of the second connecting piece 1-13 is also in clearance fit with the first supporting rod 1-6, and the reserved threaded holes on the two through holes of the second connecting pieces 1-13 are screwed by using studs after the size and the angle are adjusted, to achieve adjustment and fixation of the relative position and angle between the first support bar 1-6 and the main support column 1-5, and the tail end positions of the first supporting rods 1-6 and the tail end positions of the second supporting rods 1-7 are matched with the zero point position of the XY-direction two-degree-of-freedom sliding assembly on a straight line so as to realize subsequent related design and functions.
Three threaded holes are reserved on the circumference of a sleeve of the lighting equipment adjuster 1-10, after the lighting equipment adjuster 1-7 is in clearance fit with the second support rod, fastening and angle and position adjustment can be carried out by screwing in screws, a lighting equipment light source with the correct angle adjustment is horizontally distributed right above the zero point position of the XY direction two-degree-of-freedom sliding assembly in a circular ring shape, a control circuit, a power supply and a control and adjustment switch of the lighting equipment are all integrated in the lighting equipment light source, an industrial camera lens is connected with an industrial camera CMOS shell through threads, and the industrial camera lens 1-9 is coaxial with a sensor photosensitive channel, the mobile phone shell rear cover performs XY-direction two-degree-of-freedom plane sliding on the XY-direction two-degree-of-freedom sliding assembly, so that illumination and all-dimensional imaging and detection of the whole surface of the mobile phone shell are realized.
The following describes the present embodiment with reference to fig. 1-2, and the automatic monitoring device for surface defects of a mobile phone case rear cover for a production line further includes a two-degree-of-freedom moving device control circuit that controls the two-degree-of-freedom moving device. The control circuit comprises a direct current output transformer I, a direct current output transformer II, a pulse signal controller, a stepping motor controller and a data adapter plate, wherein the zero position sensor and the direct current output transformer I are connected with a household 220v power supply, 5v voltage is output to drive the zero position sensor and the pulse signal controller, the pulse signal controller and the data adapter plate are connected in parallel to be connected to the output end of the 5v direct current output transformer I, the direct current output transformer II is connected with the household 220v power supply to output 24v voltage to drive the stepping motor controller and the pulse signal controller, the pulse signal controller and the stepping motor controller are connected in parallel to be connected to the output end of the 24v direct current output transformer II, the signal ends of the zero position sensor and the stepping motor controller are both connected to the data adapter plate to obtain input digital control signals, and the data adapter plate is connected with the pulse signal controller through a flat cable, and obtaining a control signal generated by programming the pulse signal controller.
The following describes the present embodiment with reference to fig. 1-2, and the automatic monitoring device for surface defects of a rear cover of a mobile phone case for a production line further includes an illumination device control circuit and an adjustment switch, both of which are used for controlling an illumination device and an imaging device. The lighting device control circuit comprises a voltage transformation circuit capable of inputting 220v and a control circuit connected with a lighting device light source in parallel, the intensity of the light source is adjusted through a knob, the lighting device light source is formed by connecting a plurality of LED lamp beads in parallel, the whole lighting device light source is annular, the circle center of the whole lighting device light source inclines inwards, and accordingly directional shadow and reflection light are weakened.
The following describes the present embodiment with reference to fig. 1-2, where the LED lamp beads used as the primary light source of the lighting device should be slightly inclined toward the central axis of the ring to increase the brightness of the lighting center, and the lighting device light source uses frosted glass or frosted transparent plastic on the shade of the LED lamp bead group to reduce the specular reflection of the light source.
The present embodiment is described below with reference to fig. 1-2, in which the control circuit and the adjustment switch of the lighting device are integrated inside the lighting device light source and are opened at the lighting device light source housing for heat dissipation.
An automatic monitoring device for surface defects of a mobile phone shell rear cover used for a production line also relates to a two-degree-of-freedom programmable control sliding platform and an imaging detection algorithm, wherein the two-degree-of-freedom programmable control sliding platform and the imaging detection algorithm comprise a direct current output transformer I, a direct current output transformer II, a pulse signal controller, a stepping motor controller, a data adapter plate, a zero position sensor, a digital imaging output and an upper computer, wherein the two-degree-of-freedom sliding component in the XY direction enables the two-degree-of-freedom planar motion control to be carried out through the programmable pulse signal controller, the programmable pulse signal controller stores a code program burnt by the upper computer through a built-in memory and runs a code through a processor when the programmable pulse signal controller works independently, a digital level generated by code logic operation is output to a specified serial port through an amplifier, and the serial port is connected with a stepping driving motor through a signal data line, the stepping drive motor generates corresponding movement by reading corresponding signals, finally realizes the control of the movement of the XY direction two-degree-of-freedom sliding component by compiling codes through a programmable pulse signal controller, the Y axis stepping drive motor 2-1, the X axis stepping drive motor 2-2, a zero position sensor and a driving power supply of the pulse signal controller are provided by a direct current output transformer I and a direct current output transformer II, the signal and the power supply of a digital imaging component are connected with an upper computer through a USB cable and are communicated and controlled by the upper computer, the digital signal is transmitted to an IO interface of the upper computer through the USB cable and is stored in an IO interface register of the upper computer, the upper computer is communicated with the IO interface through an IO bus to acquire the information registered on the USB bus in time and process the data after the communication is finished to acquire an image file to be analyzed, for the files to be processed, the upper computer performs classification judgment on the files through a pre-trained deep learning neural network model, finally outputs the judgment result on a human-computer interaction interface, and simultaneously controls the digital imaging assembly to sample at a set position while detecting, and performs image acquisition when a rear cover of a mobile phone shell carried on the XY direction two-degree-of-freedom sliding assembly passes through a specific area or a set point position, so that the whole detection piece finally generates and outputs the result on the upper computer.
The invention relates to an automatic monitoring device for surface defects of a rear cover of a mobile phone shell for a production line, which has the following use principle: when the back of the mobile phone is upward and is placed on a customized fixture to realize accurate positioning, the fixed position of the mobile phone shell can directly correspond to the zero position of the XY direction two-freedom degree sliding assembly, at the moment, the control on the XY direction two-freedom degree sliding assembly can be directly mapped into the movement control of the relative point position on the mobile phone, the digital image in the imaging assembly aligned with the zero position of the XY direction two-freedom degree sliding assembly also has the consistent movement relation with the digital image, further, the pulse signal controller can be subjected to movement programming through an upper computer to control the area path passing through the center of the imaging assembly, the digital signal on the path can be sampled through the upper computer programming, the acquired image can be stored and further processed in the upper computer, and further, the files to be processed can be classified and judged through a pre-trained deep learning neural network model, and analyzing the image data through a corresponding algorithm to obtain a corresponding surface damage judgment result in the upper computer.
Claims (9)
1. The utility model provides a lid surface defect automatic monitoring device behind cell phone case for assembly line, includes two degree of freedom mobile device, customization cell-phone anchor clamps (1-4), lighting apparatus and imaging device, its characterized in that: the customized mobile phone clamp (1-4) is arranged on the two-degree-of-freedom mobile device, and the lighting equipment and the imaging equipment are arranged above the customized mobile phone clamp (1-4).
2. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line according to claim 1, wherein: the two-degree-of-freedom moving device comprises an X-axis sliding assembly (1-2) and a Y-axis sliding assembly (1-3), wherein the X-axis sliding assembly (1-2) and the Y-axis sliding assembly (1-3) respectively drive the customized mobile phone clamp (1-4) to move in the X-axis direction and the Y-axis direction.
3. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line, according to claim 2, is characterized in that: the Y-axis sliding assembly (1-3) comprises a Y-axis stepping driving motor (2-1), a Y-axis sliding groove (2-4), a Y-axis lead screw (2-5), a Y-axis sliding block (2-9), a Y-axis sliding rail (2-12), a Y-axis motor reducer (2-15) and a customized mobile phone clamp threaded fastener (2-18), the customized mobile phone clamp (1-4) is fixed on the Y-axis sliding block (2-9) through the customized mobile phone clamp threaded fastener (2-18), the Y-axis sliding rail (2-12) is provided with the Y-axis sliding groove (2-4), the Y-axis sliding block (2-9) is connected on the Y-axis sliding groove (2-4) in a sliding manner, the Y-axis stepping driving motor (2-1) is provided with the Y-axis motor reducer (2-15), the Y-axis stepping driving motor (2-1) is arranged on the Y-axis sliding rail (2-12), an output shaft of the Y-axis stepping driving motor (2-1) is fixedly connected with a Y-axis screw rod (2-5), and the Y-axis screw rod (2-5) is matched with a Y-axis sliding block (2-9) through threads.
4. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line, according to claim 3, is characterized in that: the X-axis sliding assembly (1-2) comprises an X-axis stepping driving motor (2-2), an X-axis sliding groove (2-3), an X-axis screw rod (2-6), an X-axis sliding block (2-8), an X-axis sliding rail (2-13) and an X-axis motor reducer (2-14), wherein the X-axis sliding groove (2-3) is arranged on the X-axis sliding rail (2-13), the X-axis sliding block (2-8) is connected on the X-axis sliding groove (2-3) in a sliding manner, the X-axis stepping driving motor (2-2) is provided with the X-axis motor reducer (2-14), an output shaft of the X-axis stepping driving motor (2-2) is fixedly connected with the X-axis screw rod (2-6), the X-axis screw rod (2-6) is matched with the X-axis sliding block (2-8) through threads, the Y-axis sliding rail (2-12) is fixedly connected to the upper part of the X-axis sliding block (2-8), the Y-axis slide rail (2-12) is vertical to the X-axis slide rail (2-13).
5. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line, according to claim 4, is characterized in that: the camera lens further comprises a bottom plate (1-1), main support columns (1-5), first support rods (1-6) and second support rods (1-7), an industrial camera CMOS (1-8), an industrial camera lens (1-9), a lighting device regulator (1-10), an imaging device connecting piece (1-11), first connecting pieces (1-12) and second connecting pieces (1-13), X-axis sliding rails (2-13) are fixedly connected to the bottom plate (1-1), the main support columns (1-5) are vertically and fixedly connected to the bottom plate (1-1), the first connecting pieces (1-12) and the second connecting pieces (1-13) are both slidably connected to the main support columns (1-5), and the first connecting pieces (1-12) and the second connecting pieces (1-13) are both fixed to the main support columns (1-5) in a screw pressing mode, the first supporting rod (1-6) and the second supporting rod (1-7) are respectively inserted on the first connecting piece (1-12) and the second connecting piece (1-13), the first supporting rod (1-6) is fixed on the first connecting piece (1-12) in a screw compression mode, the second supporting rod (1-7) is fixed on the second connecting piece (1-13) in a screw compression mode, the imaging equipment connecting piece (1-11) is fixed at the end part of the first supporting rod (1-6) through an adjusting bolt, the industrial camera (1-8) is fixed on the imaging equipment connecting piece (1-11), the industrial camera lens (1-9) is arranged on the industrial camera CMOS (1-8), the lighting equipment adjuster (1-10) is fixedly connected at the end part of the second supporting rod (1-7), the lighting equipment adjuster (1-10) is provided with a lighting equipment light source.
6. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line according to claim 1, wherein: the two-freedom-degree mobile device control circuit controls the two-freedom-degree mobile device.
7. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line according to claim 5, wherein: the imaging device also comprises an illuminating device control circuit and an adjusting switch, wherein the illuminating device control circuit and the adjusting switch are used for controlling the illuminating device and the imaging device.
8. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line according to claim 7, wherein: LED lamp beads used as element light sources of the lighting device light source are slightly inclined towards the central axis of the circular ring so as to increase the brightness of the lighting center, and frosted glass or frosted transparent plastic is adopted on a shade of the LED lamp bead group of the lighting device light source so as to reduce the mirror reflection of the light source.
9. The device for automatically monitoring the surface defects of the rear cover of the mobile phone shell for the assembly line according to claim 8, wherein: the control circuit and the regulating switch of the lighting device are integrated inside the lighting device light source, and the shell of the lighting device light source is opened for heat dissipation.
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| CN202110540586.0A CN113203682A (en) | 2021-05-18 | 2021-05-18 | A lid surface defect automatic monitoring device behind cell phone case for assembly line |
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Application publication date: 20210803 |