CN112325792A - Grenade fuse safety pin safety detection method based on visual detection - Google Patents
Grenade fuse safety pin safety detection method based on visual detection Download PDFInfo
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- CN112325792A CN112325792A CN202010936139.2A CN202010936139A CN112325792A CN 112325792 A CN112325792 A CN 112325792A CN 202010936139 A CN202010936139 A CN 202010936139A CN 112325792 A CN112325792 A CN 112325792A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C21/00—Checking fuzes; Testing fuzes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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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
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Abstract
The invention discloses a method for detecting safety of a fuse safety pin of an grenade based on visual detection, and relates to the technical field of grenade production detection. The method comprises the following steps: acquiring a real object image of the grenade to be detected at a plurality of angles; taking a real object image at a first angle, detecting whether a fuse safety pin is unhooked or not based on image identification, and storing a first detection result; taking a physical image at a second angle, detecting whether the laser carving characters on the upper surface of the fuse are qualified or not based on image identification, and storing a second detection result; taking a real object image at a third angle, detecting whether the outer diameter of the projectile body is qualified or not based on image identification, and storing a third detection result; and summarizing the first detection result, the second detection result and the third detection result and outputting a detection data table. The invention can respectively carry out automatic and standard detection on the three external structure defects of the grenade product based on computer vision detection, and can greatly improve the detection efficiency and the detection accuracy of the grenade product compared with the existing manual detection.
Description
Technical Field
The invention relates to the technical field of grenade production detection, in particular to a grenade fuse safety pin safety detection method based on visual detection.
Background
A grenade is a manually thrown ammunition, and generally consists of an ammunition body and a fuse. The grenade can kill living targets and destroy tanks and armored vehicles. The grenade has played an important role in the wars of the past due to small volume, small mass and convenient carrying and use. In the production process of the grenade, defective goods can appear with a certain probability, and the defective goods need to be strictly eliminated, so that adverse consequences in later use are prevented. The main defects of defective products include three major aspects: 1. whether the fuse safety pin is assembled in place or not, namely whether the pin shaft of the fuse safety pin is unhooked from the projectile body or not; 2. whether the laser etched characters on the upper surface of the fuse pin are qualified or not, namely whether the laser etched characters are clear, default and the like; 3. whether the outer diameter of the grenade body is out of the deviation range of the outer diameter size of the preset specification, namely whether the grenade body is smaller or larger.
The three defects have adverse consequences on the normal delivery, namely later-stage normal use of the grenade, the fuse safety pin is unhooked, potential safety hazards exist, laser carving characters on the upper surface of the fuse safety pin are default or fuzzy, the identification and registration of the grenade are not facilitated, the outer diameter of the bomb body is larger or smaller, the bomb body does not conform to the preset outer diameter size specification, and the problem of too much or too little explosive loading exists. Most of the existing detection means are manual detection, so that the detection efficiency is low, and large detection errors easily occur due to human negligence.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for detecting the safety of a grenade fuse safety pin based on visual detection, which can greatly improve the detection efficiency and the detection accuracy of grenade products and improve the use safety of the grenade products.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a safety detection method for a grenade fuse safety pin based on visual detection comprises the following steps:
s1, acquiring real object images of the grenade to be detected at multiple angles;
s2, taking a real object image at a first angle, detecting whether the fuse safety pin is unhooked or not based on image identification, and storing a first detection result;
s3, taking a real object image at a second angle, detecting whether the laser carving characters on the upper surface of the fuse are qualified or not based on image recognition, and storing a second detection result;
s4, taking a real object image of a third angle, detecting whether the outer diameter of the projectile body is qualified or not based on image recognition, and storing a third detection result;
and S5, summarizing the first detection result, the second detection result and the third detection result and outputting a detection data table.
Preferably, in the method for detecting safety of an grenade safety pin based on visual detection, in step S1, the first-angle real image is an image of a side direction facing the grenade safety pin, the second-angle real image is an image of a top direction facing the grenade safety pin, and the third-angle real image is an image of a side direction facing the grenade body.
Preferably, in the method for detecting safety of an arming fuse safety pin based on visual detection, the step of capturing the real object image at the first angle includes:
s11.1, arranging a first light source and a second light source which are opposite to each other above the left side and the right side of a first shooting table;
s11.2, arranging a third light source above the first shooting table and close to the rear side of the first shooting table;
s11.3, arranging a first upper camera and a second upper camera above the first shooting table at positions corresponding to the middle part of the first shooting table;
s11.4, starting the first light source, the second light source and the third light source;
s11.5, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the right side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
s11.6, starting the first upper camera, and shooting a right image of the grenade fuse safety pin on the right side of the grenade fuse safety pin;
s11.7, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the left side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
and S11.8, starting the second upper camera, and shooting a left image of the grenade fuse safety pin on the left side of the grenade fuse safety pin.
Preferably, in the method for detecting safety of an arming fuse safety pin based on visual detection, the step of capturing the real object image at the second angle includes:
s12.1, arranging a fourth light source above the second shooting table;
s12.2, arranging a third upper camera above the second shooting table at a position corresponding to the middle part of the second shooting table;
s12.3, turning on a fourth light source;
s12.4, placing the grenade to be detected on a horizontal second shooting table in a standing posture, and enabling the top position of a grenade fuse safety pin to be located right below the third upper camera in an upward mode;
and S12.5, starting the third upper camera to shoot a top image of the fuse pin of the grenade.
Preferably, in the method for detecting safety of an arming fuse safety pin based on visual detection, the step of capturing the real object image at the third angle includes:
s13.1, arranging a fifth light source, a sixth light source, a seventh light source and an eighth light source on the peripheral side of the third shooting platform;
s13.2, respectively arranging a first side camera, a second side camera, a third side camera and a fourth side camera at the middle positions of the outer sides of a fifth light source, a sixth light source, a seventh light source and an eighth light source of the third shooting platform;
and S13.3, placing the grenade to be detected at the center of a horizontal third shooting table in a standing position, and starting a first side camera, a second side camera, a third side camera and a fourth side camera to respectively shoot side views of grenade projectiles.
Preferably, in the above safety detection method for fuse safety pin of grenade based on visual detection, the step S2 includes:
s21, taking the real object image of the first angle, and searching and positioning the characteristic area of the fuse safety pin to be detected through the outline;
s22, searching and positioning the pin shaft position of the fuse safety pin through the outline again, and extracting a characteristic region image of the pin shaft position;
and S23, detecting whether the pin shaft of the fuse insurance pin is unhooked or not based on computer vision identification.
Preferably, in the above safety detection method for fuse safety pin of grenade based on visual detection, the step S3 includes:
s31, taking a real object image at a second angle, and searching and positioning a laser carving character characteristic area on the upper surface of the fuse insurance pin to be detected through the outline;
s32, extracting characters in the laser carving character characteristic area through computer vision recognition;
s33, respectively carrying out positioning marking on the extracted characters according to the character sequence from left to right and from top to bottom in the character characteristic region of the laser carving;
s34, comparing and matching the characters after the positioning marks with the characters in the character library, and identifying the characters of the positioning marks through computer vision;
s35, converting the recognized characters in the image form in the laser carving character characteristic area and outputting the converted characters into corresponding computer code characters, and arranging and outputting the output computer code characters according to the corresponding positioning marks.
Preferably, in the method for detecting safety of fuse safety pin of grenade based on visual detection, the method comprises the following steps
The step S4 includes:
s41, taking a real object image at a third angle, and enhancing the outline edge of the image;
s42, detecting the point positions of the opposite outlines on the two sides by adopting an edge width extraction algorithm;
s43, the required average value of the outer diameter is calculated by averaging these relative points.
Preferably, in the safety detection method for the fuse safety pin of the grenade based on the visual detection, the first light source, the second light source and the third light source are all strip-shaped light sources, and the fourth light source is a coaxial light source.
Preferably, in the method for detecting safety of fuse safety pin of grenade based on visual detection, the method comprises the following steps
The fifth light source, the sixth light source, the seventh light source and the eighth light source are all coaxial light sources.
The invention has the beneficial effects that: the method for detecting the safety of the grenade fuse safety pin is based on computer vision detection, and can be used for automatically and accurately detecting the three external structure defects of grenade products. Whether the pin shaft of the fuse safety pin is unhooked from the bomb body, whether laser engraved characters on the upper surface of the fuse safety pin are clear and default, whether the outer diameter of the grenade bomb body is out of the deviation range of the outer diameter size of the preset specification, and the three structural defects can be automatically and quickly detected in a standardized manner by means of a computer vision recognition technology. Compared with the existing manual detection, the method for detecting the safety pin of the grenade fuse can greatly improve the detection efficiency and the detection accuracy of grenade products and improve the use safety of the grenade products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a main flow diagram of the present invention;
FIG. 2 is a flowchart illustrating a process of acquiring a physical image at a first angle according to the present invention;
FIG. 3 is a flowchart illustrating a second angle acquisition of a physical image according to the present invention;
FIG. 4 is a flowchart illustrating a third exemplary embodiment of the present invention;
FIG. 5 is a flowchart illustrating step S2 according to the present invention;
FIG. 6 is a flowchart illustrating step S3 according to the present invention;
FIG. 7 is a flowchart illustrating step S4 according to the present invention;
fig. 8 is a characteristic region diagram of the fuse protector pin of the present invention positioned at step S21;
fig. 9 is a characteristic region image of the pin position extracted in step S22 according to the present invention;
FIG. 10 is a diagram of the laser etched character feature areas located at step S31 according to the present invention;
FIG. 11 is an interface diagram of the present invention for extracting the uplink character in the laser scribing character feature area in step S32;
FIG. 12 is an interface diagram of the present invention for extracting descending characters in the laser etching character feature region in step S32;
fig. 13 is an interface diagram of the present invention locating the point of the opposite profile on both sides at step S42.
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.
As shown in fig. 1, an embodiment of the present invention provides a safety detection method for an grenade fuse safety pin based on visual detection, which includes the following steps:
s1, acquiring real object images of the grenade to be detected at multiple angles;
s2, taking a real object image at a first angle, detecting whether the fuse safety pin is unhooked or not based on image identification, and storing a first detection result;
s3, taking a real object image at a second angle, detecting whether the laser carving characters on the upper surface of the fuse are qualified or not based on image recognition, and storing a second detection result;
s4, taking a real object image of a third angle, detecting whether the outer diameter of the projectile body is qualified or not based on image recognition, and storing a third detection result;
and S5, summarizing the first detection result, the second detection result and the third detection result and outputting a detection data table.
Specifically, in step S1, the first-angle real image is an image facing the side direction of the grenade safety pin, the second-angle real image is an image facing the top direction of the grenade safety pin, and the third-angle real image is an image facing the side direction of the grenade body.
As shown in fig. 2, the step of capturing the object image at the first angle includes:
s11.1, arranging a first light source and a second light source which are opposite to each other above the left side and the right side of a first shooting table;
s11.2, arranging a third light source above the first shooting table and close to the rear side of the first shooting table;
s11.3, arranging a first upper camera and a second upper camera above the first shooting table at positions corresponding to the middle part of the first shooting table;
s11.4, starting the first light source, the second light source and the third light source;
s11.5, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the right side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
s11.6, starting the first upper camera, and shooting a right image of the grenade fuse safety pin on the right side of the grenade fuse safety pin;
s11.7, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the left side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
and S11.8, starting the second upper camera, and shooting a left image of the grenade fuse safety pin on the left side of the grenade fuse safety pin.
Specifically, as shown in fig. 3, the step of capturing the object image at the second angle includes:
s12.1, arranging a fourth light source above the second shooting table;
s12.2, arranging a third upper camera above the second shooting table at a position corresponding to the middle part of the second shooting table;
s12.3, turning on a fourth light source;
s12.4, placing the grenade to be detected on a horizontal second shooting table in a standing posture, and enabling the top position of a grenade fuse safety pin to be located right below the third upper camera in an upward mode;
and S12.5, starting the third upper camera to shoot a top image of the fuse pin of the grenade.
Specifically, as shown in fig. 4, the step of capturing the object image at the third angle includes:
s13.1, arranging a fifth light source, a sixth light source, a seventh light source and an eighth light source on the peripheral side of the third shooting platform;
s13.2, respectively arranging a first side camera, a second side camera, a third side camera and a fourth side camera at the middle positions of the outer sides of a fifth light source, a sixth light source, a seventh light source and an eighth light source of the third shooting platform;
and S13.3, placing the grenade to be detected at the center of a horizontal third shooting table in a standing position, and starting a first side camera, a second side camera, a third side camera and a fourth side camera to respectively shoot side views of grenade projectiles.
Specifically, as shown in fig. 5, the step S2 includes:
s21, taking the real object image of the first angle, and searching and positioning the characteristic area of the fuse safety pin to be detected through the outline; the characteristic area of the fuse safety pin is shown as a rectangular mark area in a side image of one fuse safety pin in the first row and the third column in fig. 8, in the actual detection process, multiple groups of first-angle real object images can be taken for multiple detections, and the result deviation caused by accidental errors is reduced.
S22, searching and positioning the pin shaft position of the fuse safety pin through the outline again, and extracting a characteristic region image of the pin shaft position; the characteristic region image of the pin location is shown as the marked region of a particular polygon shape in fig. 9.
And S23, detecting whether the pin shaft of the fuse insurance pin is unhooked or not based on computer vision identification.
Specifically, as shown in fig. 6, the step S3 includes:
s31, taking a real object image at a second angle, and searching and positioning a laser carving character characteristic area on the upper surface of the fuse insurance pin to be detected through the outline; as shown in fig. 10, a laser etched character feature area on the fuse pin upper surface is shown.
S32, extracting characters in the laser carving character characteristic area through computer vision recognition, as shown in FIG. 11 and FIG. 12;
s33, respectively carrying out positioning marking on the extracted characters according to the character sequence from left to right and from top to bottom in the character characteristic region of the laser carving; FIG. 11 is an interface diagram of the step S32 of extracting the ascending characters in the laser etching character feature region, and FIG. 12 is an interface diagram of the step S32 of extracting the descending characters in the laser etching character feature region according to the present invention;
s34, comparing and matching the characters after the positioning marks with the characters in the character library, and identifying the characters of the positioning marks through computer vision;
s35, converting the recognized characters in the image form in the laser carving character characteristic area and outputting the converted characters into corresponding computer code characters, and arranging and outputting the output computer code characters according to the corresponding positioning marks.
In order to improve the character recognition efficiency and accuracy, 26 English letters and several numbers 0-9 are firstly registered into templates and stored in a word stock, and when detecting characters, the detected characters are compared and matched with the stored template characters so as to recognize the characters needing to be detected.
Specifically, as shown in fig. 7, the step S4 includes:
s41, taking a real object image at a third angle, and enhancing the outline edge of the image;
s42, detecting the point positions of the opposite outlines on the two sides by adopting an edge width extraction algorithm, as shown in figure 12;
s43, the required average value of the outer diameter is calculated by averaging these relative points.
Specifically, in a preferred embodiment of the present invention, the first light source, the second light source and the third light source are all bar-shaped light sources, and the fourth light source is a coaxial light source. The fifth light source, the sixth light source, the seventh light source and the eighth light source are all coaxial light sources. In the present invention, the computer vision recognition technology is the prior art, and the detailed description of the recognition process is omitted here.
In conclusion, the safety detection method for the fuse safety pin of the grenade is based on computer vision detection, and can be used for automatically and accurately detecting the defects of three external structures of grenade products. Whether the pin shaft of the fuse safety pin is unhooked from the bomb body, whether laser engraved characters on the upper surface of the fuse safety pin are clear and default, whether the outer diameter of the grenade bomb body is out of the deviation range of the outer diameter size of the preset specification, and the three structural defects can be automatically and quickly detected in a standardized manner by means of a computer vision recognition technology. Compared with the existing manual detection, the method for detecting the safety pin of the grenade fuse can greatly improve the detection efficiency and the detection accuracy of grenade products and improve the use safety of the grenade products.
The method for detecting the safety of the fuse safety pin of the grenade based on visual detection provided by the embodiment of the invention is described in detail, a specific embodiment is adopted in a specific real-time mode to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention. Meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A safety detection method for a grenade fuse safety pin based on visual detection is characterized by comprising the following steps:
s1, acquiring real object images of the grenade to be detected at multiple angles;
s2, taking a real object image at a first angle, detecting whether the fuse safety pin is unhooked or not based on image identification, and storing a first detection result;
s3, taking a real object image at a second angle, detecting whether the laser carving characters on the upper surface of the fuse are qualified or not based on image recognition, and storing a second detection result;
s4, taking a real object image of a third angle, detecting whether the outer diameter of the projectile body is qualified or not based on image recognition, and storing a third detection result;
and S5, summarizing the first detection result, the second detection result and the third detection result and outputting a detection data table.
2. The method for detecting safety of fuse safety pin based on visual sense as claimed in claim 1, wherein in said step S1, said first angle real object image is an image facing to the side direction of fuse safety pin, said second angle real object image is an image facing to the top direction of fuse safety pin, and said third angle real object image is an image facing to the side direction of fuse body.
3. The method for detecting the safety of the grenade fuse safety pin based on the visual detection as claimed in claim 2, wherein the step of shooting the real object image at the first angle comprises the following steps:
s11.1, arranging a first light source and a second light source which are opposite to each other above the left side and the right side of a first shooting table;
s11.2, arranging a third light source above the first shooting table and close to the rear side of the first shooting table;
s11.3, arranging a first upper camera and a second upper camera above the first shooting table at positions corresponding to the middle part of the first shooting table;
s11.4, starting the first light source, the second light source and the third light source;
s11.5, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the right side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
s11.6, starting the first upper camera, and shooting a right image of the grenade fuse safety pin on the right side of the grenade fuse safety pin;
s11.7, placing the grenade to be detected on a horizontal first shooting table in a prone position, and enabling the left side part of a grenade fuse safety pin to be located right below a first upper camera in a forward-upward mode;
and S11.8, starting the second upper camera, and shooting a left image of the grenade fuse safety pin on the left side of the grenade fuse safety pin.
4. The method for detecting the safety of the grenade fuse safety pin based on the visual detection as claimed in claim 2, wherein the step of shooting the second-angle real object image comprises the following steps:
s12.1, arranging a fourth light source above the second shooting table;
s12.2, arranging a third upper camera above the second shooting table at a position corresponding to the middle part of the second shooting table;
s12.3, turning on a fourth light source;
s12.4, placing the grenade to be detected on a horizontal second shooting table in a standing posture, and enabling the top position of a grenade fuse safety pin to be located right below the third upper camera in an upward mode;
and S12.5, starting the third upper camera to shoot a top image of the fuse pin of the grenade.
5. The method for detecting the safety of the grenade fuse safety pin based on the visual detection as claimed in claim 2, wherein the step of shooting the real object image at the third angle comprises the following steps:
s13.1, arranging a fifth light source, a sixth light source, a seventh light source and an eighth light source on the peripheral side of the third shooting platform;
s13.2, respectively arranging a first side camera, a second side camera, a third side camera and a fourth side camera at the middle positions of the outer sides of a fifth light source, a sixth light source, a seventh light source and an eighth light source of the third shooting platform;
and S13.3, placing the grenade to be detected at the center of a horizontal third shooting table in a standing position, and starting a first side camera, a second side camera, a third side camera and a fourth side camera to respectively shoot side views of grenade projectiles.
6. The method for detecting safety of fuse safety pin of grenade based on visual inspection as claimed in claim 1, wherein said step S2 includes:
s21, taking the real object image of the first angle, and searching and positioning the characteristic area of the fuse safety pin to be detected through the outline;
s22, searching and positioning the pin shaft position of the fuse safety pin through the outline again, and extracting a characteristic region image of the pin shaft position;
and S23, detecting whether the pin shaft of the fuse insurance pin is unhooked or not based on computer vision identification.
7. The method for detecting safety of fuse safety pin of grenade based on visual inspection as claimed in claim 1, wherein said step S3 includes:
s31, taking a real object image at a second angle, and searching and positioning a laser carving character characteristic area on the upper surface of the fuse insurance pin to be detected through the outline;
s32, extracting characters in the laser carving character characteristic area through computer vision recognition;
s33, respectively carrying out positioning marking on the extracted characters according to the character sequence from left to right and from top to bottom in the character characteristic region of the laser carving;
s34, comparing and matching the characters after the positioning marks with the characters in the character library, and identifying the characters of the positioning marks through computer vision;
s35, converting the recognized characters in the image form in the laser carving character characteristic area and outputting the converted characters into corresponding computer code characters, and arranging and outputting the output computer code characters according to the corresponding positioning marks.
8. The method for detecting safety of fuse safety pin of grenade based on visual inspection as claimed in claim 1, wherein said step S4 includes:
s41, taking a real object image at a third angle, and enhancing the outline edge of the image;
s42, detecting the point positions of the opposite outlines on the two sides by adopting an edge width extraction algorithm;
s43, the required average value of the outer diameter is calculated by averaging these relative points.
9. The method for detecting the safety of the grenade fuse safety pin based on the visual detection as claimed in claim 4, wherein the first light source, the second light source and the third light source are all strip-shaped light sources, and the fourth light source is a coaxial light source.
10. The method for detecting the safety of the grenade fuse safety pin based on the visual inspection as claimed in claim 5, wherein the fifth light source, the sixth light source, the seventh light source and the eighth light source are all coaxial light sources.
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Application publication date: 20210205 |