A system for detecting a bullet ogive

Abstract

The application discloses a kind of detection systems of bullet body jointing, vertical through type scanning detection mode is adopted, relative to bullet body side scanning or photographing detection mode avoids the problem that the detection precision and the precision of mathematical model fitting cannot meet the jointing detection requirement caused by the problem that coaxiality is difficult to guarantee and jumping, the mode is simple in structure, high in detection precision, and convenient for engineering implementation;Vertical through type scanning detection can realize off-line, non-stop detection, higher production rhythm, faster detection speed.

Description

Technical Field

[0001] This invention relates to the field of ammunition assembly technology, and in particular to a projectile chamber detection system. Background Technology

[0002] During ammunition assembly, a bore-closing test is required to ensure the ammunition can properly enter the gun or cannon chamber during use. Common bore-closing tests primarily use contact-based methods based on a bore-closing mold. This involves using a bore-closing mold to simulate the chambering of each round, and combining this with positioning or pressure testing to determine the smoothness of the bore-closing process. Another method involves capturing images of the projectile's side, creating a mathematical model, and then comparing it to the original model.

[0003] The contact-based testing method based on the bore mold inevitably requires each testing equipment to prepare a high-precision bore mold for each type of ammunition product. This bore mold is expensive and has a long processing time. At the same time, it is necessary to ensure that the product is temporarily offline or paused online during use, resulting in a low production cycle.

[0004] The method of acquiring images of the projectile's side, then comparing them with the original model after mathematical modeling, requires a complex design to ensure that the detection head rotates precisely one full revolution relative to the projectile from the side, or that the projectile spins one full revolution along its own central axis without axial or radial runout. On the one hand, it is difficult to guarantee the coaxiality of the detection head's revolution around the projectile, and the projectile's spin process cannot guarantee that it will spin without axial or radial runout along its own central axis. Ultimately, this results in insufficient detection accuracy for bore-close detection, making it difficult to implement in engineering applications. On the other hand, this method also requires the product to be temporarily offline or paused online, affecting production cycle time. Summary of the Invention

[0005] In view of the above problems, the present invention provides a projectile bore detection system for overcoming or at least partially solving the above problems.

[0006] This invention provides the following solution:

[0007] A projectile engagement detection system, comprising:

[0008] The projectile transport unit is used to transport the projectile horizontally along the X-axis; the projectile transport unit includes a carrier and an encoder, and the carrier is used to load the projectile in a vertical position with the tip facing upward;

[0009] A linear laser displacement sensing unit is disposed above the transmission path of the projectile; the linear laser displacement sensing unit is used to vertically project a linear laser detection light curtain onto the transmission path of the projectile.

[0010] When the projectile passes through the linear laser detection light curtain, the linear laser displacement sensing unit performs the following operations:

[0011] Based on the velocity and position information fed back by the encoder, the coordinates (X, Y, Z) of the three key elements—the X-axis position, the horizontal and vertical X-axis positions, and the height of the projectile—are obtained.

[0012] The three-dimensional data model P1 of the projectile is constructed using the three-element coordinates (X,Y,Z);

[0013] Based on the feature points of the projectile tip and the bottom circle of the projectile body, the reference point O1 (x,y,z) in the three-dimensional data model P1 is determined.

[0014] The three-dimensional data model P1 is calibrated as a standard data model P0 based on O (0,0,0) by offsetting.

[0015] The standard data model P0 is compared with the mathematical model H(R) of the standard bore-closed model in a simulated bore-closed configuration, and the projectile's qualification is determined based on the comparison results.

[0016] Preferably: A coordinate system is established through the cross-section of the projectile's central axis, with the center of the projectile's bottom surface as the origin, the projectile's radius R as the horizontal axis, and the projectile's height H as the vertical axis;

[0017] The mathematical model H(R) of the same type is obtained by characterizing the height and radius curve of the projectile.

[0018] Preferably, the height and radius curve of the projectile are characterized by the H(R) curve in the first quadrant.

[0019] Preferably, the H(R) curve is obtained based on a standard projectile bore mold.

[0020] Preferably, the simulated bore-closing comparison of the standard data model P0 and the mathematical model H(R) of the standard bore-closing model includes:

[0021] The z-coordinate corresponding to the effective bottom plane coordinates (x, y) of the standard data model P0 is compared with the corresponding height in the mathematical model H(R) of the same type.

[0022] Preferably: using the XY plane coordinates (x, y) of the projectile's bottom in the standard data model P0, the bottom radius r corresponding to the (x, y) coordinate is calculated as (x, y) 2 +y 2 ) 1 / 2 ;

[0023] Using the aforementioned mathematical model H(R), the standard height h corresponding to the radius r is calculated;

[0024] The detection height h0(x,y) obtained through the standard data model P0 is compared with the standard height h.

[0025] Preferably: if h0(x,y) is less than or equal to h, then the point corresponding to the (x,y) coordinates is qualified.

[0026] Preferably: Based on the step size of the detection accuracy, traverse the plane coordinates (x, y) of the projectile bottom in the standard data model P0. If all points pass the detection, the projectile is deemed to have passed the chamber detection.

[0027] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0028] The projectile chamber detection system provided in this application adopts a vertical through-type scanning detection method. Compared with the side scanning or photographic detection method, it avoids the problems of difficulty in ensuring coaxiality and the resulting accuracy issues caused by runout, as well as the inability of the fitted mathematical model to meet the requirements of chamber detection. This method has a simple structure, high detection accuracy, and is easy to implement in engineering. The vertical through-type scanning detection method can achieve continuous and uninterrupted detection, resulting in a higher production cycle and faster detection speed.

[0029] Meanwhile, the simplified mathematical model H(R) of the standard bore-closing mold facilitates model comparison due to its simple curves and small data volume. This simulated bore-closing method uses the detection height value as the basic data for bore-closing detection comparison, making it easy to implement. Based on the data model, simulated bore-closing enables rapid and high-precision simulated bore-closing detection, achieving non-contact bore-closing. It eliminates the need for expensive and difficult-to-manufacture bore-closing molds, significantly reducing detection equipment costs and processing time.

[0030] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a projectile engagement detection system provided in an embodiment of the present invention;

[0033] Figure 2 This is a diagram showing the relationship between the XY plane coordinates of the projectile's bottom and the corresponding radius R of the projectile's bottom surface, provided in an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the projectile height-radius mathematical model H(R) provided in the embodiments of the present invention, with the center of the projectile's bottom surface as the origin, the projectile radius R as the horizontal axis, and the projectile height H as the vertical axis.

[0035] In the figure: Projectile transmission unit 1, carrier 11, encoder 12, linear laser displacement sensing unit 2, linear laser detection light curtain 21, projectile 3. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0037] See Figure 1 This invention provides a projectile engagement detection system, such as... Figure 1 As shown, the system may include:

[0038] Projectile transfer unit 1, which is used to horizontally transfer projectile 3 along the X-axis direction; the projectile transfer unit 1 includes carrier 11 and encoder 12, and the carrier 11 is used to load projectile 3 in a vertical position with the projectile tip facing upward.

[0039] Linear laser displacement sensing unit 2 is disposed above the transmission path of the projectile 3; the linear laser displacement sensing unit 2 is used to vertically project a linear laser detection light curtain 21 onto the transmission path of the projectile 3.

[0040] When the projectile 3 passes through the linear laser detection light curtain 21, the linear laser displacement sensing unit 2 performs the following operations:

[0041] Based on the velocity and position information fed back by the encoder 12, the coordinates (X, Y, Z) of the three elements of the projectile 3—its X-axis position, its horizontal and vertical X-axis positions, and its height—are obtained.

[0042] The three-dimensional data model P1 of the projectile 3 is constructed using the three-element coordinates (X,Y,Z);

[0043] Based on the feature points of the projectile tip and the bottom circle of the projectile body, the reference point O1 (x,y,z) in the three-dimensional data model P1 is determined.

[0044] The three-dimensional data model P1 is calibrated as a standard data model P0 based on O (0,0,0) by offsetting.

[0045] The standard data model P0 is compared with the mathematical model H(R) of the standard bore-closed model in a simulated bore-closed configuration, and the projectile's qualification is determined based on the comparison results.

[0046] Furthermore, through the cross-section of the projectile's central axis, a coordinate system is established with the center of the projectile's bottom surface as the origin, the projectile's radius R as the horizontal axis, and the projectile's height H as the vertical axis.

[0047] The mathematical model H(R) of the same type is obtained by characterizing the height and radius curve of the projectile.

[0048] The height and radius curves of the projectile are characterized using the H(R) curve in the first quadrant. The H(R) curve is obtained based on a standard projectile bore mold.

[0049] In actual comparison, embodiments of this application can provide a simulated bore-fitting comparison of the standard data model P0 and the mathematical model H(R) of the standard bore-fitting mold, including:

[0050] The z-coordinate corresponding to the effective bottom plane coordinates (x, y) of the standard data model P0 is compared with the corresponding height in the mathematical model H(R) of the same type.

[0051] Furthermore, using the XY plane coordinates (x, y) of the projectile's bottom in the standard data model P0, the base radius r corresponding to the (x, y) coordinates is calculated as (x, y). 2 +y 2 ) 1 / 2 ;

[0052] Using the aforementioned mathematical model H(R), the standard height h corresponding to the radius r is calculated;

[0053] The detection height h0(x,y) obtained through the standard data model P0 is compared with the standard height h.

[0054] When determining the comparison result, if h0(x,y) is less than or equal to h, then the point is qualified.

[0055] Based on the step size of the detection accuracy, the coordinates (x, y) of the bottom plane of the projectile in the standard data model P0 are traversed. If all points pass the detection, the projectile is deemed to have passed the chamber detection.

[0056] The projectile chamber detection system provided in this application addresses the problems of contact detection methods based on chamber molds during ammunition assembly, which require multiple sets of expensive and difficult-to-manufacture chamber molds and necessitate temporary offline or online pauses during use, thus affecting production cycle time; and the problems of image detection methods that acquire images from the side of the projectile and then compare them with the original model after mathematical modeling, which have complex structures, make it difficult to ensure the coaxiality of the detection head when it revolves around the projectile's central axis during side image acquisition, and cannot avoid axial and radial runout of the projectile along its own central axis when it spins, ultimately resulting in detection accuracy and the accuracy of the fitted mathematical model failing to meet the requirements for chamber detection, making it difficult to achieve engineering applications, and also the problem of not being able to perform online detection, affecting production cycle time.

[0057] The system provided in the embodiments of this application will be described in detail below.

[0058] The projectile chamber detection system provided in this application embodiment consists of a projectile transmission unit 1, a linear array laser displacement sensing unit 2, etc. The projectile 3 is vertically mounted in a carrier 11. The linear array laser detection light curtain 21, which is vertically projected by the linear array laser displacement sensing unit 2, passes horizontally along the X direction from the projectile transmission unit 1. The linear array laser displacement sensing unit 2, combined with the velocity and position information fed back by the encoder 12 of the projectile transmission unit 1, collects in real time a three-dimensional data model P1 of the projectile composed of the coordinates (X, Y, Z) of the three elements: position in the X direction, horizontal and vertical position in the X direction, and height Z of the projectile.

[0059] The linear laser beam projected by the linear laser displacement sensing unit 2 forms a detection surface. The linear laser displacement sensing unit 2 is located above the projectile 3, and the detection surface of the linear laser displacement sensing unit 2 is perpendicular to the horizontal transmission plane of the projectile transmission unit.

[0060] The projectile transmission unit 1 consists of a carrier 11 and an encoder 12. The carrier 11 transmits along the X-axis and is perpendicular to the detection surface of the linear laser displacement sensing unit 2. The encoder 12 is connected to the linear laser displacement sensing unit 2 via a data bus, and detects the speed and position of the carrier 11 and transmits them to the linear laser displacement sensing unit 2 in real time.

[0061] The projectile 3 is in a standing position and passes through the detection light curtain vertically projected by the linear laser displacement sensing unit. The linear laser displacement sensing unit, combined with the encoder feedback velocity and position information of the projectile transmission unit, collects the three-dimensional data model of the projectile in real time, which consists of the coordinates (X, Y, Z) of the three elements: position in the X direction, horizontal and vertical position in the X direction, and height Z of the projectile.

[0062] Compared to side scanning or photographic inspection of projectiles, this method avoids problems such as difficulty in ensuring coaxiality and runout issues leading to inaccurate detection, as well as the inability of the fitted mathematical model to meet the requirements of bore-closed inspection. This method has a simple structure, high data acquisition accuracy, and is easy to implement in engineering. Vertical through-type scanning inspection can achieve continuous and uninterrupted inspection, resulting in a higher production cycle and faster inspection speed.

[0063] Using this method, the constructed standard mating mold's identical mathematical model H(R) is simplified, with simple curves and small data volume, facilitating model comparison. This simulated mating method uses the detection height value as the basic data for mating detection comparison, making it easy to implement. Simulated mating based on the data model enables rapid and high-precision simulated mating detection, achieving non-contact mating. It eliminates the need for expensive and difficult-to-manufacture mating molds, significantly reducing detection equipment costs and processing time.

[0064] In the specific implementation, the detected three-dimensional detection data of the projectile is first standardized into a data model. After acquiring the three-dimensional data model P1 of the projectile, which consists of the coordinates (X,Y,Z) of the three elements of the projectile's position in the X direction, the horizontal and vertical positions of X, and the height Z of the projectile, the reference point O1 (x,y,z) in the data model is found based on feature points such as the projectile tip (highest point) and the bottom circle of the projectile's lower end face. Then, after offsetting, the projectile data model is calibrated into a standard data model P0 with O (0,0,0) as the reference.

[0065] Then, construct a mathematical model H(R) of the standard cavity mold. For example... Figure 2 , Figure 3 As shown, based on the axial symmetry of the projectile, a coordinate system is established along a cross-section passing through the projectile's central axis, with the center of the projectile's bottom surface as the origin, the projectile's radius R as the horizontal axis, and the projectile's height H as the vertical axis. H(R) can characterize the projectile's height / radius curve. For simplification, the H(R) curve in the first quadrant can be used to characterize the projectile's height H / (bottom) radius R characteristic. This curve is obtained based on a standard projectile bore mold.

[0066] Finally, a simulated bore-closing comparison is performed between the standardized projectile data model P0 and the identical mathematical model H(R) of the standard bore-closing model. Essentially, this simulated bore-closing comparison involves comparing the z-coordinate corresponding to the effective bottom plane coordinates (x, y) of the projectile data model P0 with the corresponding height h in the identical mathematical model of the standard bore-closing model.

[0067] Specific comparison method:

[0068] The first step is to calculate the base radius r corresponding to the (x, y) coordinates on the XY plane of the P0 projectile model. 2 +y 2) 1 / 2 ;

[0069] In the second step, according to the isomorphic mathematical model H(R) of the standard chambering die, obtain the standard height h corresponding to the radius r.

[0070] In the third step, compare the detected height h0(x, y) obtained from the data model P0 with the model standard height h. If h(x, y) is less than or equal to h, then this point is qualified.

[0071] Based on the step size of the detection accuracy, traverse the bottom plane coordinates (x, y) of the P0 projectile. If all points are detected as qualified, then it is determined that the chambering detection of this projectile is qualified.

[0072] When constructing the isomorphic mathematical model H(R) of the standard chambering die, according to the axial symmetry of the projectile, in the cross-section passing through the central axis of the projectile, establish a coordinate system with the center of the bottom surface of the projectile as the origin, the radius R of the projectile as the horizontal axis, and the height H of the projectile as the vertical axis. H(R) can characterize the height / radius curve of the projectile. As a simplification, the H(R) curve in the first quadrant is used to realize the characterization of the characteristics of the projectile height H / (bottom surface) radius R.

[0073] In summary, the projectile chambering detection system provided by this application adopts a vertical through-type scanning detection method. Compared with the side scanning or photographing detection method of the projectile, it avoids problems such as difficult to ensure coaxiality and jumping problems, resulting in detection accuracy and the accuracy of the fitted mathematical model not meeting the requirements of chambering detection. This method has a simple structure, high detection accuracy, and is convenient for engineering implementation; the vertical through-type scanning detection can achieve offline and non-stop detection, with a higher production beat and faster detection speed.

[0074] At the same time, the isomorphic mathematical model H(R) of the constructed standard chambering die is simplified, with a simple curve and a small amount of data, which is convenient for model comparison; this simulated chambering method uses the detected height value as the basic data for chambering detection comparison, and is easy to implement. The simulated chambering based on the data model can achieve fast and high-precision simulated chambering detection, realize non-contact chambering, do not require expensive and difficult-to-process chambering dies, and greatly reduce the detection equipment cost and processing time.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0077] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A system for detecting a body lumen, comprising: The application relates to a cartridge body detection device, which comprises the following parts: a cartridge body conveying unit for conveying cartridge bodies in the X-axis direction; the cartridge body conveying unit comprises a carrier and an encoder, and the carrier is used for loading cartridge bodies in a vertical state with the cartridge heads upwards; a linear array laser displacement sensing unit arranged above the cartridge body conveying path; the linear array laser displacement sensing unit is used for vertically projecting a linear array laser detection light curtain to the conveying path of the cartridge bodies; the linear array laser displacement sensing unit is used for performing the following operations when the cartridge bodies pass through the linear array laser detection light curtain: combining the speed position information fed back by the encoder, the X-axis direction position of the cartridge bodies, the horizontal and vertical X-axis direction position and the three-element coordinates (X, Y, Z) of the cartridge bodies are obtained, three-dimensional data model P1 of the cartridge bodies is obtained by using the three-element coordinates (X, Y, Z); a reference point O1 (x, y, z) in the three-dimensional data model P1 is determined according to the cartridge head and the bottom circle feature point of the lower end surface of the cartridge body; the three-dimensional data model P1 is calibrated to a standard data model P0 with O (0, 0, 0) as the reference point through offset; the standard data model P0 is compared with a same-type mathematical model H (R) of a standard cartridge body chambering die, and whether the cartridge body is qualified is determined according to the comparison result; a coordinate system with the center of the bottom surface of the cartridge body as the origin, the radius R of the cartridge body as the horizontal axis and the height H of the cartridge body as the vertical axis is established through the cross section of the central axis of the cartridge body; the same-type mathematical model H (R) is obtained by using the height and radius curve of the cartridge body. comparing the z coordinate corresponding to the effective bottom plane coordinate (x, y) of the standard data model P0 with the corresponding height in the same-type mathematical model H (R). The H (R) curve in the first quadrant is used to represent the height and radius curve of the cartridge body.

2. The system of claim 1, wherein, The H (R) curve is obtained according to the standard cartridge body chambering die.

3. The system of claim 2, wherein, The standard height h corresponding to the radius r is obtained by using the same-type mathematical model H (R).

4. The system of claim 3, wherein, The bottom surface radius r corresponding to the (x, y) coordinate pair is calculated using the X-Y plane coordinates (x, y) of the bottom of the projectile in the standard data model P0 2 +y 2 ) 1 / 2 ; The detection height h0 (x, y) obtained by the standard data model P0 is compared with the standard height h. If h0 (x, y) is less than or equal to h, the point corresponding to the (x, y) coordinate is qualified.

5. The system of claim 4, wherein, The bottom plane coordinate (x, y) of the cartridge body in the standard data model P0 is traversed based on the step distance of the detection accuracy, and if all the points are qualified, the cartridge body chambering detection is determined to be qualified.

6. The system of claim 5, wherein, ​

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