CN108540721B - Automatic polarization control visual sensor device and control method thereof - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/663—Remote control of cameras or camera parts, e.g. by remote control devices for controlling interchangeable camera parts based on electronic image sensor signals
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- 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
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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
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Abstract
The invention discloses a vision sensor device for automatic polarization control and a control method thereof, wherein the device comprises a polarized light filter lens module, an image acquisition module, an image recognition module and a communication module which are connected in sequence, wherein two ends of a filter lens control module are respectively connected with the polarized light filter lens module and the image acquisition module, and an image polarization algorithm processing module is connected with the image acquisition module; the polarized light and light filtering lens control module is used for receiving the control instruction sent by the image polarized light algorithm processing module and sending the control instruction to the polarized light and light filtering lens module, the polarized light and light filtering lens module is used for adjusting the polarized light and light filtering lens according to the control instruction sent by the polarized light and light filtering lens control module, the image recognition processing module is used for carrying out image recognition processing on the image collected by the image collecting module after the polarized light and light filtering lens is adjusted to obtain a recognition result, and the communication module is used for sending the recognition result to external receiving equipment. The invention can carry out high-efficiency and low-cost self-adaptive stable detection on different products made of different materials.
Description
Technical Field
The invention relates to the field of sensing equipment, in particular to a visual sensor device for automatic polarization control and a control method thereof.
Background
With the continuous deepening of digital technology, industrial intelligent manufacturing has a great deal of development. The vision sensor bears the responsibility of providing the user with the vision detection in a specific area in each link of intelligent manufacturing, and the stability and the definition of collected images of products made of different materials are one of important indexes for measuring a vision detection system.
In order to obtain original images of various products of different types meeting the requirement of visual detection, most of the existing visual sensors adopt different types of lenses and polarizers which are manually replaced, the experience of technical personnel is required, and various lenses, polarizers and external light sources are frequently replaced to try, so that a large amount of manpower and resources are consumed, the implementation of visual detection items is very difficult, and the requirement of replacing manpower to realize automatic detection cannot be met. The problems of low efficiency and high deployment cost are generally existed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic polarization control vision sensor device and a control method thereof, which provides a set of efficient and low-cost automatic polarization filter lens vision sensor system solution to solve the problem of self-adaptive stable detection of different products made of different materials in a mode of combining software and hardware control based on a polarization filter lens module and an image polarization automatic adjustment algorithm in a vision sensor.
The technical scheme adopted by the invention is as follows:
a vision sensor device with automatic polarization control comprises a polarization and light filtering lens control module, an image polarization algorithm processing module, a polarization and light filtering lens head module, an image acquisition module, an image recognition module and a communication module which are sequentially connected, wherein two ends of the light filtering lens control module are respectively connected with the polarization and light filtering lens head module and the image acquisition module, and the image polarization algorithm processing module is connected with the image acquisition module;
the image acquisition module is used for acquiring the current scene image of the polarized filter lens module in real time,
the image polarization algorithm processing module is used for filtering the image acquired in real time, comparing the current filtering result with the previous filtering result to obtain a control instruction, sending the control instruction to the polarization and light filtering lens control module through the image acquisition module,
the polarized light and filter lens control module is used for receiving the control instruction sent by the image polarized light algorithm processing module and sending the control instruction to the polarized light and filter lens module,
the polarized light filter lens module is used for adjusting the polarized light filter lens according to the control instruction sent by the polarized light filter lens control module,
the image recognition processing module is used for carrying out image recognition processing on the image acquired by the image acquisition module after the polarized light filtering lens is adjusted to acquire a recognition result,
the communication module is used for sending the identification result of the image identification processing module to external receiving equipment.
Furthermore, the polarized light filter lens module comprises a lens, a light source and a polarized light filter, and the polarized light filter lens module adjusts the light source and the polarized light filter up and down according to the instruction sent by the polarized light filter lens control module.
Further, the polarized filter head module consists of an M12 lens, an LED red light and a polarized filter.
Furthermore, the image polarization algorithm processing module is also used for keeping the filtering processing result in a storage chip of the image processing module.
Furthermore, the polarization and filter lens control module is composed of an STM32 single-chip microcomputer control module. Furthermore, the image acquisition module adopts a CMOS chip. Furthermore, the image polarization algorithm processing module adopts an FPGA chip as a processor. Furthermore, the image recognition processing module adopts an ARM main control chip.
Further, the image recognition of the image recognition processing module comprises object feature recognition, character recognition, face recognition and two-dimensional code recognition.
Furthermore, the communication module comprises an Ethernet chip, a 3G/4G chip and a Bluetooth chip, and the external receiving equipment comprises a server, a display, an alarm lamp and a PLC.
Further, the invention also discloses a control method of the vision sensor device with automatic polarization control, which comprises the following steps:
step 1: adjusting the polarized lens to be right in front of the lens and the light source;
step 2: acquiring a primary image of an electronic component on the production line platform;
and step 3: carrying out image multiple filtering processing on the primary image to extract a primary edge reflection coefficient of the electronic component;
and 4, step 4: adjusting the polarized lens to be right behind the lens and the light source;
and 5: collecting secondary images of electronic components on the plane of the production line;
step 6: carrying out image multiple filtering processing on the secondary image to extract the secondary edge reflection coefficient of the electronic component,
and 7: comparing the primary edge reflection coefficient with the secondary edge reflection coefficient to obtain the lowest reflection coefficient, and calculating to obtain a control command according to the lowest reflection coefficient,
and 8: adjusting the optimal positions of the polarized lens on the lens and the light source according to the control instruction;
and step 9: collecting a tertiary image of the electronic component at the optimal position;
step 10: carrying out component contour identification on the tertiary image of the electronic component to obtain a contour central point and a contour area;
step 11: and sending the contour center point and the contour area information to an external receiving device.
Further, the method is carried out. Acquiring a primary image of a slightly tilted electronic component containing a metal sheet on the assembly line platform;
further, the primary edge reflection coefficient of the electronic component is stored in step 3, and specifically, the primary edge reflection coefficient of the electronic component is maintained to the storage chip of the image recognition processing module corresponding to the vision sensor device for automatic polarization control of the present invention.
By adopting the technical scheme, the invention provides a set of efficient and low-cost automatic polarized light filter lens vision sensor system solution to solve the problem of self-adaptive stable detection of different products made of different materials based on a mode of combining the polarized light filter lens module with software and hardware control of an image polarized light automatic adjustment algorithm in the vision sensor. The invention can be widely applied to various vision sensors and vision detection systems.
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The invention is described in further detail below with reference to the accompanying drawings and the detailed description;
fig. 1 is a schematic diagram illustrating a structural principle of an automatic polarization-controlled vision sensor device according to the present invention.
Detailed Description
As shown in fig. 1, the present invention discloses an automatic polarization controlled vision sensor device, which comprises a polarized light filter lens control module, an image polarization algorithm processing module, and a polarized light filter lens module, an image acquisition module, an image recognition module and a communication module which are connected in sequence, wherein two ends of the filter lens control module are respectively connected with the polarized light filter lens module and the image acquisition module, and the image polarization algorithm processing module is connected with the image acquisition module;
the image acquisition module is used for acquiring the current scene image of the polarized filter lens module in real time,
the image polarization algorithm processing module is used for filtering the image acquired in real time, comparing the current filtering result with the previous filtering result to obtain a control instruction, sending the control instruction to the polarization and light filtering lens control module through the image acquisition module,
the polarized light and filter lens control module is used for receiving the control instruction sent by the image polarized light algorithm processing module and sending the control instruction to the polarized light and filter lens module,
the polarized light filter lens module is used for adjusting the polarized light filter lens according to the control instruction sent by the polarized light filter lens control module,
the image recognition processing module is used for carrying out image recognition processing on the image acquired by the image acquisition module after the polarized light filtering lens is adjusted to acquire a recognition result,
the communication module is used for sending the identification result of the image identification processing module to external receiving equipment.
Furthermore, the polarized light filter lens module comprises a lens, a light source and a polarized light filter, and the polarized light filter lens module adjusts the light source and the polarized light filter up and down according to the instruction sent by the polarized light filter lens control module.
Further, the polarized filter head module consists of an M12 lens, an LED red light and a polarized filter.
Furthermore, the image polarization algorithm processing module is also used for keeping the filtering processing result in a storage chip of the image processing module.
Furthermore, the polarization and filter lens control module is composed of an STM32 single-chip microcomputer control module. Furthermore, the image acquisition module adopts a CMOS chip. Furthermore, the image polarization algorithm processing module adopts an FPGA chip as a processor. Furthermore, the image recognition processing module adopts an ARM main control chip.
Further, the image recognition of the image recognition processing module comprises object feature recognition, character recognition, face recognition and two-dimensional code recognition.
Furthermore, the communication module comprises an Ethernet chip, a 3G/4G chip and a Bluetooth chip, and the external receiving equipment comprises a server, a display, an alarm lamp and a PLC.
Further, the invention also discloses a control method of the vision sensor device with automatic polarization control, which comprises the following steps:
step 1: adjusting the polarized lens to be right in front of the lens and the light source;
step 2: acquiring a primary image of an electronic component on the production line platform;
and step 3: carrying out image multiple filtering processing on the primary image to extract a primary edge reflection coefficient of the electronic component;
and 4, step 4: adjusting the polarized lens to be right behind the lens and the light source;
and 5: collecting secondary images of electronic components on the plane of the production line;
step 6: carrying out image multiple filtering processing on the secondary image to extract the secondary edge reflection coefficient of the electronic component,
and 7: comparing the primary edge reflection coefficient with the secondary edge reflection coefficient to obtain the lowest reflection coefficient, and calculating to obtain a control command according to the lowest reflection coefficient,
and 8: adjusting the optimal positions of the polarized lens on the lens and the light source according to the control instruction;
and step 9: collecting a tertiary image of the electronic component at the optimal position;
step 10: carrying out component contour identification on the tertiary image of the electronic component to obtain a contour central point and a contour area;
step 11: and sending the contour center point and the contour area information to an external receiving device.
Further, the method is carried out. Acquiring a primary image of a slightly tilted electronic component containing a metal sheet on the assembly line platform;
further, the primary edge reflection coefficient of the electronic component is stored in step 3, and specifically, the primary edge reflection coefficient of the electronic component is maintained to the storage chip of the image recognition processing module corresponding to the vision sensor device for automatic polarization control of the present invention.
The present invention will be specifically explained below:
specifically, the polarized filter head module consists of an M12 lens AZURE-01825BM, LED red light and a polarized filter. And the light source and the polarizing filter are adjusted up and down according to the instruction sent by the polarizing filter lens control module. The polarized light filter lens control module is composed of an STM3232F103 single-chip microcomputer control module and is used for receiving a control instruction sent by the image polarization algorithm processing module and sending the control instruction to the polarized light filter lens module. And the image acquisition module is used for realizing the real-time image acquisition of the current scene by an Anson CMOS chip MT9V 034. The image polarization algorithm processing module is used for processing images acquired by the image acquisition module in real time through the FPGA chip Xilinx XC7A100T to calculate to obtain a current image filtering processing result, meanwhile, the processing result is stored in a memory chip Samsung K4B4G1646D-BCK0 of the image processing module, the processing result is compared with a previous image filtering processing result to obtain a control instruction through a reflection coefficient, and the control instruction is sent to the polarized light filter lens control module through the image acquisition module. The image recognition processing module consists of an ARM main control chip RK3288 and is used for carrying out image recognition processing on the currently acquired image after the automatic polarization filtering lens is adjusted to obtain a recognition result. The communication module consists of a network chip REALTEK RTL8211E-VB-CG and is used for sending the identification result of the image identification processing module to external receiving equipment.
The detailed description of the control method of the vision sensor of the present invention is as follows:
firstly, a control switch of a polarized light filter lens module is controlled by a polarized light filter lens control module, and a polarized light lens is adjusted to be right in front of a lens and a light source; then, the image acquisition module acquires a slightly tilted electronic component image containing a metal sheet on the assembly line platform; then, the image polarization algorithm processing module performs image multiple filtering processing on the acquired image to extract the edge reflection coefficient of the electronic component, and stores the edge reflection coefficient into the memory of the image recognition processing module. And then the control switch of the polarized light filter lens module is controlled by the polarized light filter lens control module again, and the polarized light lens is removed to the right back of the lens and the light source. Then the image acquisition module acquires images of the electronic components on the assembly line plane, the images are transmitted to the image polarization algorithm processing module to perform image multi-filtering processing on the acquired images, edge reflection coefficients of the electronic components are extracted again, reflection coefficients are obtained and are compared with the reflection coefficients stored in the memory before to obtain parameters with the lowest reflection coefficients, then control instructions of the polarized light filter lens are obtained through calculation according to the lowest parameters, and the polarized light filter lens control module sends the parameters to adjust the polarized light lens to the optimal position of the lens and the light source. And then, the image acquisition module acquires an electronic component image, transmits the electronic component image to the image recognition processing module to perform component contour recognition to obtain a contour central point and a contour area, and finally, the communication module transmits information of the contour central point and the contour area to the PLC.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (9)
1. An automatic polarization controlled vision sensor device, characterized by: the device comprises a polarized light and light filter lens control module, an image polarized light algorithm processing module, a polarized light and light filter lens module, an image acquisition module, an image recognition processing module and a communication module which are sequentially connected, wherein two ends of the polarized light and light filter lens control module are respectively connected with the polarized light and light filter lens module and the image acquisition module, and the image polarized light algorithm processing module is connected with the image acquisition module;
the image acquisition module is used for acquiring the current scene image of the polarized filter lens module in real time,
the image polarization algorithm processing module is used for filtering the image acquired in real time, comparing the current filtering result with the previous filtering result to obtain a control instruction, sending the control instruction to the polarization and light filtering lens control module through the image acquisition module,
the polarized light and filter lens control module is used for receiving the control instruction sent by the image polarized light algorithm processing module and sending the control instruction to the polarized light and filter lens module,
the polarized light filter lens module is used for adjusting the polarized light filter lens according to the control instruction sent by the polarized light filter lens control module,
the image recognition processing module is used for carrying out image recognition processing on the image acquired by the image acquisition module after the polarized light filtering lens is adjusted to acquire a recognition result,
the communication module is used for sending the identification result of the image identification processing module to external receiving equipment.
2. An automatic polarization controlled vision sensor apparatus according to claim 1, wherein: the polarized light filter lens module comprises a lens, a light source and a polarized light filter, and the polarized light filter lens module adjusts the light source and the polarized light filter up and down according to an instruction sent by the polarized light filter lens control module.
3. An automatic polarization controlled vision sensor apparatus according to claim 2, wherein: the polarized light filter lens module consists of an M12 lens, LED red light and a polarized light filter.
4. An automatic polarization controlled vision sensor apparatus according to claim 1, wherein: the image polarization algorithm processing module is also used for keeping the filtering processing result in a storage chip of the image identification processing module.
5. An automatic polarization controlled vision sensor apparatus according to claim 1, wherein: the image recognition of the image recognition processing module comprises object feature recognition, character recognition, face recognition and two-dimensional code recognition.
6. An automatic polarization controlled vision sensor apparatus according to claim 1, wherein: the communication module comprises an Ethernet chip, a 3G/4G chip and a Bluetooth chip, and the external receiving equipment comprises a server, a display, an alarm lamp and a PLC.
7. A control method of an automatic polarization controlled vision sensor device applied to an automatic polarization controlled vision sensor device according to any one of claims 1 to 6, characterized in that: the control method comprises the following steps:
step 1: adjusting the polarized lens to be right in front of the lens and the light source;
step 2: acquiring a primary image of an electronic component on the production line platform;
and step 3: carrying out image multiple filtering processing on the primary image to extract a primary edge reflection coefficient of the electronic component;
and 4, step 4: adjusting the polarized lens to be right behind the lens and the light source;
and 5: collecting secondary images of electronic components on the plane of the production line;
step 6: carrying out image multiple filtering processing on the secondary image to extract the secondary edge reflection coefficient of the electronic component,
and 7: comparing the primary edge reflection coefficient with the secondary edge reflection coefficient to obtain the lowest reflection coefficient, and calculating to obtain a control command according to the lowest reflection coefficient,
and 8: adjusting the optimal positions of the polarized lens on the lens and the light source according to the control instruction;
and step 9: collecting a tertiary image of the electronic component at the optimal position;
step 10: carrying out component contour identification on the tertiary image of the electronic component to obtain a contour central point and a contour area;
step 11: and sending the contour center point and the contour area information to an external receiving device.
8. The method of claim 7, wherein the step of controlling the vision sensor device comprises: and 2, acquiring a primary image of the slightly tilted electronic component containing the metal sheet on the assembly line platform.
9. The method of claim 7, wherein the step of controlling the vision sensor device comprises: and 3, storing the primary edge reflection coefficient of the electronic component.
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| CN101360989A (en) * | 2006-01-11 | 2009-02-04 | 日本电工株式会社 | Layered film fabrication method, layered film defect detection method, layered film defect detection device, layered film, and image display device |
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