CN112958491A

CN112958491A - Part vision detection system based on DSP and FPGA

Info

Publication number: CN112958491A
Application number: CN202110348452.9A
Authority: CN
Inventors: 姜阔胜; 郭帅; 郑文杰
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-06-15

Abstract

The invention relates to the field of industrial part defect detection, in particular to a part vision detection system based on a DSP (digital signal processor) and an FPGA (field programmable gate array). The part sorting unit sorts the parts to different part storage baskets according to the processing result. The invention can detect and sort the defects of parts with various shapes, display the types and the number of the defects in real time and detect the shape defects of various small and medium-sized parts.

Description

Part vision detection system based on DSP and FPGA

Technical Field

The invention relates to the field of industrial part defect detection, in particular to a part vision detection system based on a DSP and an FPGA.

Background

The DSP chip is widely applied to digital control and motion control, and mainly comprises disk drive control, engine control, laser printer control, inkjet printer control, motor control, electric system control, robot control, high-precision servo system control, numerical control machine tools and the like. The application of DSP in real-time image processing detection is increasing in recent years, and the superiority of some high-performance DSP processors in fixed-point and floating-point calculation speeds makes the DSP processors have great advantages in real-time performance, programmability and high speed

The prior patent also provides some solutions, for example, chinese patent CN201610374148.0 discloses an intelligent automatic eyebrow-penciling device, which comprises a microcontroller in the eyebrow-penciling mechanism, a longitudinal stepping motor, a transverse stepping motor, a camera, a power module, a nose clip, an algorithm chip module, a wireless transmission module, and a frequency converter, wherein the longitudinal stepping motor and the transverse stepping motor are connected with the microcontroller in the eyebrow-penciling mechanism, the camera is connected with the microcontroller in the eyebrow-penciling mechanism, and the frequency converter is connected with the stepping motor. For example, chinese patent CN201410053411.7 discloses a solar silicon wafer surface detection device based on DSP machine vision, which includes a machine vision module, an industrial control module, an automatic sorting module and a transmission belt device. And chinese patent CN201310326601.7 discloses a vision inspection system based on DSP, which comprises a light source module, a digital CCD camera, a DSP image processing module, a real-time display module and an upper computer module. The patents can respectively realize the detection of a single object and the detection of people or objects, but cannot provide a complete scheme for detecting the real-time defects of parts of an industrial manufacturing assembly line, and cannot realize the functions of sorting and classifying detected products and the like.

Disclosure of Invention

In order to solve the defects in the background technology, the invention aims to provide a part vision detection system based on DSP and FPGA and a use method thereof.

The purpose of the invention can be realized by the following technical scheme:

a part vision detection system based on DSP and FPGA comprises a detected part transmission unit, an image acquisition unit, a processing control unit and a part sorting unit.

The processing control unit comprises an LCD display, a DSP module and an FPGA module, the DSP module is fixed on the electric control cabinet through bolts, the LCD display screen is fixed on the electric control cabinet through bolts, the LCD display is electrically connected with the DSP module through a wire, the FPGA module is fixed on the electric control cabinet through bolts, and the FPGA module is electrically connected with the DSP module.

Furthermore, the to-be-detected part transmission unit comprises a material transmission belt and to-be-detected parts, and the to-be-detected parts are uniformly distributed on the upper surface of the material transmission belt at intervals;

the image acquisition unit comprises a first camera, a second camera, a third camera, a first light source, a second light source and a support. The first camera is electrically connected with the DSP module and is fixed on the bracket through a bolt, the second camera is electrically connected with the DSP module and is fixed on the bracket through a bolt, the third camera is electrically connected with the DSP module and is fixed on the bracket through a bolt, the first light source is fixed on the bracket through a bolt and is connected on a 220V alternating current power supply through a wire, and the second light source is fixed on the bracket through a bolt and is connected on the 220V alternating current power supply through a wire;

the part sorting unit comprises an air pump nozzle and a part storage box, the air pump nozzle is electrically connected with the FPGA module and is connected with an air source through a bolt, and the air pump nozzle and the part storage box are respectively and correspondingly arranged on two sides of the material conveying belt;

further, the included angle between first light source and the first camera is 30, and the included angle between second light source and the first camera is 30, and the second camera is 180 levels with the third camera and places, and first camera is 90 perpendicular arranging downwards with the material conveying interband.

The invention has the beneficial effects that:

compared with the prior art, the invention increases the image processing function of the DSP on the appearance of the part, simultaneously obtains image information from the right above and the left and right directions by using the cameras with three different angles, can realize real-time, quick and efficient image processing in the industrial manufacturing environment by using the high-speed processing capacity of the DSP, ensures that the processing and action processes are quicker and more efficient by using the mode of the DSP and the FPGA, can provide real-time defect detection and display quantity for various small and medium-sized parts, can excellently sort the detected parts, and provides real-time defect detection for the manufacturing of industrial parts.

Meanwhile, the invention has the advantages of compact structure, low power consumption, stable and reliable work, low equipment cost, intellectualization and the like.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of an image capture unit according to the present invention;

FIG. 3 is a schematic flow chart illustrating the operation of the present invention;

wherein the numbers in the figures are as follows:

1. material transmission band, 2, the part that awaits measuring, 3, first camera, 4, second camera, 5, third camera, 6, first light source, 7, second light source, 8, support, 9, air pump nozzle, 10, part containing box, 11, LCD display, 12, DSP module, 13, FPGA module, 14, electrical control cabinet

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

The part visual detection system based on the DSP and the FPGA is characterized by comprising a detected part transmission unit, an image acquisition unit, a processing control unit and a part sorting unit, wherein the detected part transmission unit transmits parts to the image acquisition unit, the image acquisition unit is connected with the processing control unit and transmits processing results of the parts to the part sorting unit through the processing control unit, and the part sorting unit sorts the parts to different part storage baskets according to the processing results.

As shown in fig. 1, the processing control unit includes an LCD display 11, a DSP module 12, and an FPGA module 13, the DSP module 12 is fixed on an electrical control cabinet 14 through bolts, the LCD display screen 11 is fixed on the electrical control cabinet 14 through bolts, and the LCD display 11 is electrically connected with the DSP module 12 through wires, the FPGA module 13 is fixed on the electrical control cabinet 14 through bolts, and the FPGA module 13 is electrically connected with the DSP module 12.

As shown in fig. 1 and 2, the part-to-be-measured conveying unit includes a material conveying belt 1 and parts to be measured 2, and the parts to be measured 2 are placed on the upper surface of the material conveying belt 1 at uniform intervals.

The image acquisition unit comprises a first camera 3, a second camera 4, a third camera 5, a first light source 6, a second light source 7 and a support 8, the first camera 3 is electrically connected with a DSP module 12, the first camera is fixed on the support 8 through bolts, the second camera 4 is electrically connected with the DSP module 12, the third camera 5 is electrically connected with the DSP module 12, the third camera is fixed on the support 8 through bolts, the first light source 6 is fixed on the support 8 through bolts, the first light source is connected on a 220V alternating current power supply through a wire, the second light source 7 is fixed on the support 8 through bolts, and the second light source is connected on the 220V alternating current power supply through a wire.

The part sorting unit comprises an air pump nozzle 9 and a part storage box 10, the air pump nozzle 9 is electrically connected with the FPGA module 13, the air pump nozzle 9 is connected with an air source through a bolt, and the air pump nozzle 9 and the part storage box 10 are respectively arranged on two sides of the material conveying belt correspondingly.

The included angle between first light source 6 and the first camera 3 is 30, and the included angle between second light source 7 and the first camera 3 is 30, and second camera 4 is 180 levels with third camera 5 and places, is 90 perpendicular arranging downwards between first camera 3 and material transmission band 1.

When the device is used, the electric appliance control cabinet 14, the first light source 6, the second light source 7 and the material conveying belt 1 are switched on, when the material conveying belt 1 conveys a detected part 2 to a position under the first camera 3, the second camera 4 and the third camera 5 automatically acquire image information at the same time and transmit the image information to the DSP module 12, the DSP module 12 processes the image information and transmits the processing result to the LCD display screen 10 and the FPGA module 13, the LCD display screen 10 displays the quantity and the type of defective products, the FPGA module 13 controls the air pump nozzle to act according to the processed information transmitted by the DSP module 12, the parts on the material conveying belt are respectively blown into the corresponding part storage boxes 10, and a scheme is provided for efficient and rapid real-time defect detection of the parts on an industrial manufacturing assembly line, and sorting the parts and displaying the advantages and disadvantages of the parts.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. A part vision detection system based on DSP and FPGA is characterized by comprising a detected part transmission unit, an image acquisition unit, a processing control unit and a part sorting unit;

the processing control unit comprises an LCD display (11), a DSP module (12) and an FPGA module (13), and is characterized in that: DSP module (12) pass through the bolt fastening on electrical control cabinet (14), LCD display screen (11) pass through the bolt fastening on electrical control cabinet (14), and LCD display (11) pass through wire and DSP module (12) electric connection, FPGA module (13) pass through the bolt fastening on electrical control cabinet (14), FPGA module (13) and DSP module (12) electric connection.

2. The visual part detection system based on the DSP and the FPGA as claimed in claim 1, wherein the transmission unit for the parts to be detected comprises a material transmission belt (1) and the parts to be detected (2), and the parts to be detected (2) are uniformly distributed on the upper surface of the material transmission belt (1) at intervals.

3. The system for visual inspection of parts based on DSP and FPGA according to claim 1, wherein the image acquisition unit comprises a first camera (3), a second camera (4), a third camera (5), a first light source (6), a second light source (7) and a bracket (8), and is characterized in that: first camera (3) and DSP module (12) electric connection, and fix on support (8) through the bolt, second camera (4) and DSP module (12) electric connection, and fix on support (8) through the bolt, third camera (5) and DSP module (12) electric connection, and fix on support (8) through the bolt, first light source (6) pass through the bolt fastening on support (8), connect on 220V alternating current power supply through the wire, second light source (7) pass through the bolt fastening on support (8), connect on 220V alternating current power supply through the wire.

4. The part vision detection system based on the DSP and the FPGA as recited in claim 1, wherein the part sorting unit comprises an air pump nozzle (9) and a part storage box (10), the air pump nozzle (9) is electrically connected with the FPGA module (13), the air pump nozzle (9) is connected with an air source through a bolt, and the air pump nozzle (9) and the part storage box (10) are respectively and correspondingly arranged on two sides of the material conveying belt.

5. The part visual inspection system based on the DSP and the FPGA as claimed in claim 1, wherein an included angle between the first light source (6) and the first camera (3) is 30 degrees, an included angle between the second light source (7) and the first camera (3) is 30 degrees, the second camera (4) and the third camera (5) are horizontally placed at 180 degrees, and the first camera (3) and the material conveying belt (1) are vertically and downwardly arranged at 90 degrees.