Material crushing device, lump particle size statistical method, and crushing degree adjustment method

Abstract

The application relates to the technical field of material crushing, in particular to a material crushing device, a crushed block particle size statistical method and a crushing degree adjustment method. The device comprises a crushing cutter assembly used for crushing materials, a sagger used for containing the materials is arranged below the crushing cutter assembly, and a rotating crushing end of the crushing cutter assembly can repeatedly extend into the sagger to crush the materials. The device can effectively improve the crushing efficiency of the materials.

Description

Technical Field

[0001] This invention relates to the field of material crushing technology, specifically a material crushing device, a method for statistical analysis of fragment size, and a method for adjusting the degree of crushing. Background Technology

[0002] Currently, ternary cathode materials undergo solid-phase chemical reactions during high-temperature sintering in roller kilns. The sintered materials generally exhibit hardening and caking, requiring the agglomerated materials to be broken up, while the output particle size must meet the process standard requirements.

[0003] Currently, commonly used equipment on the market has the following problems:

[0004] 1. The crushing equipment has a single function.

[0005] 2. The uncontrollable discharge particle size and crushing cycle time pose significant challenges to subsequent processing.

[0006] It is evident that current crushing equipment struggles to accurately detect the particle size distribution of crushed materials and cannot promptly optimize and adjust the control parameters of the crushing process. Consequently, it fails to further improve material crushing efficiency while simultaneously achieving energy conservation and emission reduction, a problem that urgently needs to be addressed. Summary of the Invention

[0007] To avoid and overcome the technical problems existing in the prior art, this invention provides a material crushing device, a method for calculating the particle size of crushed materials, and a method for adjusting the degree of crushing. The device of this invention can effectively improve the crushing efficiency of materials.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A material crushing device includes a crushing blade assembly for crushing materials, a sagger for holding materials is arranged below the crushing blade assembly, and the rotating crushing end of the crushing blade assembly can repeatedly extend into the sagger to crush the materials.

[0010] As a further embodiment of the present invention: the crushing tool assembly includes multiple rotating cutter discs, and each rotating cutter disc includes a rotating shaft arranged vertically in the axial direction, and a main cutting edge installed at the bottom end of the rotating shaft, and each main cutting edge is evenly distributed around the rotating shaft in sequence.

[0011] As a further embodiment of the present invention: there are five sets of rotating cutterheads, with the four sets on the outer side symmetrically distributed around the axis of rotation of the middle set; the top of the rotating shaft of each of the four outer sets of rotating cutterheads is coaxially fixed with a driven gear, and the top of the rotating shaft of the middle set of rotating cutterheads is coaxially fixed with a driving gear, and all four driven gears mesh with the driving gear for transmission.

[0012] As a further embodiment of the present invention: the rotating shaft of the middle set of rotating cutter discs passes through the drive gear and is connected to the power mechanism through a belt drive structure.

[0013] As a further embodiment of the present invention: a telescopic part is installed at the bottom of the sagger, which can drive the sagger to reciprocate in the vertical direction. The telescopic part includes an eccentric wheel with its rotation axis arranged horizontally. A guide sleeve is fixedly installed above the eccentric wheel with its axis arranged vertically. A guide shaft is coaxially inserted in the guide sleeve, and the sagger is fixedly installed on the top of the guide shaft. A roller is rotatably installed at the bottom of the guide shaft, and the wheel surface of the roller forms a rolling engagement with the wheel surface of the eccentric wheel. When the roller is in the highest position, the rotating cutter head is inserted into the material inside the sagger. When the roller is in the lowest position, the rotating cutter head and the material inside the sagger are separated from each other.

[0014] As a further aspect of the present invention: the vertical moving speed of the sagger is expressed as follows:

[0015]

[0016] In the formula, u(ω) represents the vertical speed of the sagger; e represents the eccentricity of the eccentric wheel; ω represents the rotational speed of the eccentric wheel; t represents time; R represents the radius of the eccentric wheel; cos represents the cosine function; and sin represents the sine function.

[0017] As a further aspect of the present invention: the cutting speed of the rotary cutter head is calculated as follows:

[0018]

[0019] In the formula, v1 represents the cutting speed of the central rotating cutter head; v2 represents the cutting speed of the surrounding rotating cutter heads; s represents the reduction ratio between the driving gear and the driven gear; D represents the diameter of the rotating cutter head; and n represents the rotational speed of the central rotating cutter head.

[0020] As a further aspect of the present invention, the displacement height of the sagger is calculated as follows:

[0021]

[0022] In the formula, L(ωt) represents the displacement height of the sagger at time t;

[0023] A method for statistical analysis of fragment particle size, which applies the aforementioned material crushing device, includes the following statistical steps:

[0024] S1. Obtain the original image of the topmost fragment in the sagger at the current degree of fragmentation in real time;

[0025] S2. Calculate the average gray value F(x,y) of each pixel in the original image;

[0026]

[0027] In the formula, F(x,y) represents the average gray value of pixel (x,y); R(x,y) represents the gray value of pixel (x,y) in the red channel; G(x,y) represents the gray value of pixel (x,y) in the green channel; and B(x,y) represents the gray value of pixel (x,y) in the blue channel.

[0028] S3. Calibrate the initial threshold T1 used to distinguish fragments from the background;

[0029]

[0030] In the formula, F max (x,y) represents the maximum average gray value in the original image; F min (x,y) represents the minimum average gray value in the original image;

[0031] S4. Store the average gray values ​​in the original image that are greater than or equal to the initial threshold T1 in the background database, and store the average gray values ​​in the original image that are less than the initial threshold T1 in the fragment database.

[0032] S5. Calculate the average gray value in the background database and the average gray value in the fragment database, and combine them to form a new threshold T2.

[0033]

[0034] In the formula, F1(x,y) represents the average gray value in the background database; F2(x,y) represents the average gray value in the fragment database.

[0035] S6. Replace the initial threshold with the new threshold, and repeat steps S4 and S5 until |T i+1 -T i |≤ΔT, at this time the discrimination threshold T=T i+1 ;T i+1 T represents the threshold obtained in the (i+1)th iteration. i Let represent the threshold obtained in the i-th iteration, and ΔT represent the threshold error;

[0036] S7. Use an edge detection operator to sharpen the original image and perform binarization classification on the sharpened original image. That is, if the average gray value of the pixels in the sharpened original image is greater than or equal to the discrimination threshold T, then the gray value of the pixel is recorded as 0; otherwise, it is recorded as 255; and the original image at this time is recorded as a black and white image.

[0037] S8. In a black and white image, each white region represents a fragment. Calculate the maximum distance d between any two pixels within each fragment of the black and white image. j,max Simultaneously, a distance threshold d is set, and the maximum distance d is set. j,max Fragments that are greater than or equal to the distance threshold d are categorized as larger fragments and stored in the larger fragment database;

[0038] S9. Calculate the total number of each larger fragment in the larger fragment database, and based on this total number, calculate the proportion of each maximum distance in the larger fragment database;

[0039]

[0040] In the formula, Represents the k-th maximum distance d in the larger fragment database. k The proportion in the larger fragment database; N represents the total number of larger fragments in the larger fragment database; n k Represents the k-th maximum distance d in the larger fragment database. k The total number in a larger fragmented database.

[0041] A method for adjusting the degree of fragmentation, which applies the above-mentioned method for statistical analysis of fragment size, includes the following adjustment steps:

[0042] A1. Calculate the sum of the probabilities of the occurrence of each maximum distance smaller than the set particle size d0 in the database of larger fragments;

[0043]

[0044] In the formula, The sum of probabilities of the occurrence of each maximum distance smaller than the set particle size d0 in the larger fragment database; N1 represents the total number of categories of maximum distance in the larger fragment database;

[0045] A2. Based on the adjustment principle, determine whether adjustment is necessary;

[0046] when If the current crushing result is deemed to meet the requirements, the material crushing device will stop operating.

[0047] when If the current crushing result does not meet the requirements, the moving speed of the sagger and the rotation speed of the cutterhead need to be adjusted as follows:

[0048]

[0049] In the formula, Δω represents the change in the current rotational speed of the eccentric wheel; T represents the sampling period of the original image;

[0050]

[0051] In the formula, Δn represents the change in the current rotational speed of the rotating cutter head located in the middle. As a further solution of the present invention:

[0052] Compared with the prior art, the beneficial effects of the present invention are:

[0053] 1. This material crushing device, through ingenious design, combines the crushing blade assembly with the crucible, enabling the rotating crushing end of the blade assembly to repeatedly extend into the crucible for efficient material crushing. This design not only improves the continuity of the crushing process but also ensures the uniformity of the crushing effect. Because the crushing blade assembly can directly act on the material inside the crucible, it reduces the time for material transfer and repositioning, thereby significantly improving the overall crushing efficiency of the material and laying a solid foundation for subsequent processing.

[0054] 2. The crushing tool assembly employs a multi-rotating cutter head design, with the main cutting edge on each cutter head evenly distributed circumferentially around the rotation axis. This structure makes the crushing process more delicate and comprehensive. The axially vertically arranged rotation axis ensures that the cutting edge maintains a stable cutting angle during crushing, improving crushing accuracy and efficiency. Simultaneously, the multi-cutter head design increases the crushing coverage, allowing materials to be crushed more thoroughly in a shorter time, further enhancing overall work efficiency.

[0055] 3. Through the axisymmetrical distribution of five sets of rotating cutterheads and the meshing transmission between driven and driving gears, the collaborative operation of the crushing cutter assembly is achieved. This layout not only makes the crushing force more balanced and avoids local overload, but also improves the stability and reliability of crushing through gear transmission. The design of the driving gear in the middle set simplifies the transmission structure, facilitates maintenance and debugging, and also improves transmission efficiency.

[0056] 4. The rotating shaft of the middle set of rotary cutterheads is connected to the power mechanism via a belt drive structure. This transmission method has advantages such as simple structure, smooth transmission, and low noise. Belt drive also provides a certain degree of buffering, reducing the direct impact of the power mechanism on the crushing cutter assembly and extending the service life of the equipment. At the same time, the ease of maintenance of belt drive reduces the maintenance cost of the equipment and improves the overall cost-effectiveness of the equipment.

[0057] 5. The telescopic design at the bottom of the sagger allows it to reciprocate vertically, cleverly achieving periodic contact and separation between the rotating cutter head and the material inside the sagger. When the roller is at its highest position, the rotating cutter head inserts into the sagger for crushing; when the roller is at its lowest position, the rotating cutter head separates from the material, facilitating discharge and preparation for the next crushing operation. This reciprocating movement not only improves the flexibility of crushing but also avoids overheating and wear problems that may arise from continuous crushing, ensuring the stability and continuity of the crushing process. Simultaneously, the telescopic design allows for easy adjustment of the crushing depth and frequency according to actual needs, meeting the crushing requirements of different materials. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the device in this invention.

[0059] Figure 2 This is a schematic diagram of the arrangement of the rotating cutter head in this invention.

[0060] Figure 3 This is a schematic diagram of the rotating cutter head in this invention.

[0061] Figure 4 This is the original image used in this invention.

[0062] Figure 5 This is the sharpened image in this invention.

[0063] Figure 6 This is a black and white image used in this invention.

[0064] Figure 7 This is a schematic diagram of the maximum distance marking in this invention.

[0065] In the figure: 11, loading platform; 12, crushing tool assembly; 121, rotary cutter head; 1211, main cutting edge; 1212, secondary cutting edge; 122, gear transmission mechanism; 123, belt transmission structure; 124, power mechanism; 13, cam motion mechanism; 131, linear motion guide mechanism; 132, eccentric wheel. Detailed Implementation

[0066] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] Please see Figure 1 , Figure 2 and Figure 3In this embodiment of the invention, a material crushing device includes a loading platform 11, a crushing cutter assembly 12, and a cam motion mechanism 13. The loading platform 11 is a thick nylon plate structure with a groove in the center for engaging and limiting the crucible. Common clamping fixtures can also be installed on the nylon plate to prevent the crucible from shifting during the crushing process.

[0068] The crushing tool assembly 12 includes a rotating cutter head 121, a gear transmission mechanism 122, a belt transmission structure 123, and a power mechanism 124. The rotating cutter head 121 is arranged above the material according to five sets of requirements, with cutter numbers W1 to W5. Simultaneously, the central cutter head rotates in the opposite direction to the surrounding cutter heads, reducing the blind zone of the cutter head over the material. Multiple main cutting edges 1211 and secondary cutting edges 1212 are arranged on the rotating cutter head 121. The main cutting edges 1211 have a cutter head diameter of D and are used for large-area cutting of hardened and agglomerated materials. The secondary cutting edges 1212 are used to cut and compress large pieces of material into smaller fragments. The holes at the secondary cutting edges 1212 also serve a discharge function. The motor in the power mechanism 124 is driven to the central cutter head at a speed of n via the belt in the belt transmission structure 123. The reduction ratio between the driving gear of the central cutter head and the driven gears of the surrounding cutter heads is s. Let the cutting speed of the central cutter head be v1, and the cutting speed of the surrounding cutter heads be v2. Then, the cutting speeds of the cutter heads satisfy the following relationship:

[0069]

[0070] The cam motion mechanism 13 includes a linear motion guide mechanism 131 and an eccentric wheel 132. The linear motion guide mechanism 131 comprises a guide sleeve, a guide shaft, and a roller. The roller and the eccentric wheel 132 form a rolling pair, reducing impact and wear. The guide sleeve and guide shaft can also be selected from standard linear guides. The radius of the eccentric wheel 132 is R, the eccentric distance OA between the rotating shaft and the center of the original wheel is e, and the angle between OA and the horizontal direction is... The eccentric wheel 132 rotates at a speed of ω, its motion time is t, and the guide mechanism travels a distance of L. The displacement velocity of the sagger then satisfies the following relationship:

[0071]

[0072] Converting the displacement velocity of the sagger into the feed cutting and retraction / feeding speeds of the crushing tool assembly 12, we get:

[0073]

[0074] Based on the principle of relative motion, the velocity was converted to facilitate subsequent calculations.

[0075] A method for statistical analysis of fragment particle size includes the following statistical steps:

[0076] S1. Obtain the original image of the topmost fragment in the crucible at the current level of fragmentation in real time. The specific steps are as follows:

[0077] An industrial camera is used to capture images of broken material fragments inside the crucible at periods T. The images are pre-processed, retaining the area inside the crucible as the target region. A standard image size of 1024px × 1024px is generated from this region's image. The resulting original image is shown below. Figure 4 As shown.

[0078] S2. Calculate the average gray value F(x,y) of each pixel in the original image;

[0079]

[0080] In the formula, F(x,y) represents the average gray value of pixel (x,y); R(x,y) represents the gray value of pixel (x,y) in the red channel; G(x,y) represents the gray value of pixel (x,y) in the green channel; and B(x,y) represents the gray value of pixel (x,y) in the blue channel.

[0081] S3. Calibrate the initial threshold T1 used to distinguish fragments from the background;

[0082]

[0083] In the formula, F max (x,y) represents the maximum average gray value in the original image; F min (x,y) represents the minimum average gray value in the original image.

[0084] S4. Store the average gray values ​​in the original image that are greater than or equal to the initial threshold T1 in the background database, and store the average gray values ​​in the original image that are less than the initial threshold T1 in the fragment database.

[0085] S5. Calculate the average gray value in the background database and the average gray value in the fragment database, and combine them to form a new threshold T2.

[0086]

[0087] In the formula, F1(x,y) represents the average gray value in the background database; F2(x,y) represents the average gray value in the fragment database.

[0088] S6. Replace the initial threshold with the new threshold, and repeat steps S4 and S5 until |T i+1 -T i |≤ΔT, at this time the discrimination threshold T=T i+1 ;T i+1T represents the threshold obtained in the (i+1)th iteration. i Let represent the threshold obtained in the i-th iteration, and ΔT represent the threshold error.

[0089] S7. When extracting the outline information of fragmented materials, the directional derivative is used. To address the impact of noise and burrs on the image edges, edge operators are employed to smooth out noise and sharpen burrs, thus making the boundary between the fragments and the background clearer. The sharpened image is shown below. Figure 5 As shown. The calculation of the edge operator is as follows:

[0090] F′ X (x,y)=F(x+1,y-1)-F(x-1,y-1)+F(x+1,y)-F(x-1,y)+F(x+1,y+1)-F(x-1,y+1);

[0091] F′ Y (x,y)=F(x-1,y+1)-F(x-1,y-1)+F(x,y+1)-F(x,y-1)+F(x+1,y+1)-F(x+1,y-1);

[0092] G[F(x,y)]=|F′ X (x,y)|+|F′ Y (x,y)|;

[0093] In the formula, F' X (x,y) represents the partial derivative of the image grayscale value along the X-axis of the pixel coordinate system in the original image; F' Y (x,y) represents the partial derivative of the image grayscale value along the Y-axis of the pixel coordinate system in the original image; G[F(x,y)] represents the operator gradient. +1 and -1 in the formula represent a displacement of one pixel.

[0094] The original image after sharpening is binarized and classified. If the average gray value of a pixel in the original image after sharpening is greater than or equal to the discrimination threshold T, the gray value of that pixel is recorded as 0; otherwise, it is recorded as 255. The original image at this point is then recorded as a black and white image. Figure 6 As shown.

[0095] S8. In a black and white image, each white region represents a fragment. Calculate the maximum distance d between any two pixels within each fragment of the black and white image. j,max ,like Figure 7 As shown. Simultaneously, a distance threshold d is set, and the maximum distance d is... j,max Fragments that are greater than or equal to the distance threshold d are categorized as larger fragments and stored in the larger fragment database;

[0096] S9. Calculate the total number of each larger fragment in the larger fragment database, and based on this total number, calculate the proportion of each maximum distance in the larger fragment database;

[0097]

[0098] In the formula, Represents the k-th maximum distance d in the larger fragment database. k The proportion in the larger fragment database; N represents the total number of larger fragments in the larger fragment database; n k Represents the k-th maximum distance d in the larger fragment database. k The total number in a larger fragmented database.

[0099] A method for adjusting the degree of breakage includes the following adjustment steps:

[0100] A1. Calculate the sum of the probabilities of the occurrence of each maximum distance smaller than the set particle size d0 in the database of larger fragments;

[0101]

[0102] In the formula, The sum of probabilities of the occurrence of each maximum distance smaller than the set particle size d0 in the larger fragment database; N1 represents the total number of categories of maximum distance in the larger fragment database.

[0103] A2. Based on the adjustment principle, determine whether adjustment is necessary;

[0104] when If the current crushing result is deemed to meet the requirements, the material crushing device will stop operating.

[0105] when If the current crushing result does not meet the requirements, the moving speed of the sagger and the rotation speed of the rotating cutterhead 121 need to be adjusted as follows:

[0106]

[0107] In the formula, Δω represents the change in the current rotational speed of the eccentric wheel 132; T represents the original image sampling period;

[0108]

[0109] In the formula, Δn represents the current change in rotational speed of the rotating cutter head 121 located in the middle.

[0110] The specific adjustments are as follows:

[0111] when The current crushing result is deemed unsatisfactory, requiring an increase in the low-strength crushing coefficient so that the crushing device can complete the material crushing within the cycle time. The rotational speed of the eccentric wheel 132 increases by Δω. 80％ The rotational speed of the center tool increases by Δn 80％ The adjusted traverse speed and cutting speed are expressed as follows:

[0112]

[0113] when The current crushing result is deemed unsatisfactory, requiring an increase in the medium-strength crushing coefficient so that the crushing device can complete the material crushing within the cycle time. The rotational speed of the eccentric wheel 132 increases by Δω. 20％ The rotational speed of the center tool increases by Δn 20％ The adjusted traverse speed and cutting speed are expressed as follows:

[0114]

[0115] when The current crushing result is deemed unsatisfactory, requiring an increase in the high-strength crushing coefficient so that the crushing device can complete the material crushing within the cycle time. The rotational speed of the eccentric wheel 132 increases by Δω. max The rotational speed of the center tool increases by Δn max The adjusted traverse speed and cutting speed are expressed as follows:

[0116]

[0117]

[0118] In summary, the material crushing device includes a loading platform 11, a crushing cutter assembly 12, and a cam mechanism. The loading platform 11 is used to support and fix the sagger. The crushing cutter assembly 12 is arranged directly above the sagger. The crushing cutter assembly 12 includes five sets of rotating cutter discs 121, which are used for rotating and cutting hardened and agglomerated materials, cutting large pieces of material into smaller pieces. The lifting and lowering movement of the cam mechanism completes the feeding, cutting, and turning of the rotating cutter discs 121 into the deeper material inside the sagger. The method for detecting the particle size of the crushed product uses an industrial camera to periodically collect material images during the crushing process. The image detection algorithm identifies the fragmented material and extracts the outline information of the fragmented material, and statistically analyzes the distribution of fragment particle size in the image. The intelligent adjustment method for crushing effect optimizes and adjusts the process control parameters of the material crushing device according to the distribution of fragment particle size, thereby improving crushing efficiency.

[0119] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A material breaking device, characterized by, It includes a crushing tool assembly (12) for crushing materials, and a sagger for holding materials is arranged below the crushing tool assembly (12). The rotating crushing end of the crushing tool assembly (12) can be repeatedly inserted into the sagger to crush the materials. The crushing cutter assembly (12) includes multiple sets of rotating cutter discs (121). One set of rotating cutter discs (121) is located in the middle, and the other rotating cutter discs (121) are evenly distributed around the axis of the middle rotating cutter disc (121). The middle set of rotating cutter discs (121) is driven by a power mechanism (124), and a drive gear is coaxially fixed on the top of the shaft of the middle rotating cutter disc (121). Each of the other rotating cutter discs (121) is coaxially fixed with a driven gear that meshes with the drive gear. The bottom of the sagger is equipped with a telescopic part that can drive the sagger to move back and forth in the vertical direction. The telescopic part includes an eccentric wheel (132) with the axis of rotation arranged horizontally. The outer edge of the eccentric wheel (132) forms a contact transmission with the sagger so that when the sagger is abutted at the highest position, the rotating cutter disc (121) is inserted into the material inside the sagger; when the sagger is abutted at the lowest position, the rotating cutter disc (121) and the material inside the sagger are separated from each other. The vertical speed of the sagger is expressed as follows: ； In the formula, This indicates the speed at which the sagger moves in the vertical direction; Indicates the eccentricity of the eccentric wheel (132); Indicates the rotational speed of the eccentric wheel (132); Indicates time; Indicates the radius of the eccentric wheel (132); Represents the cosine function; Represents the sine function; The cutting speed of the rotary cutter head (121) is calculated as follows: ； In the formula, This indicates the cutting speed of the rotating cutter head (121) located in the middle; This indicates the cutting speed of the rotating cutter head (121) located around the perimeter; This indicates the reduction ratio between the driving gear and the driven gear; Indicates the diameter of the rotating cutter head (121); This indicates the rotational speed of the rotating cutter head (121) located in the middle; The fragments produced by the material crushing device are statistically analyzed according to the following fragment size statistics method, including the following statistical steps: S1. Real-time acquisition of the original image of the topmost fragment in the sagger at the current degree of fragmentation; S2, calculate the average gray value of each pixel point in the original image ; ； In the formula, Represents pixels The average gray value; Represents pixels Grayscale values ​​in the red channel; Represents pixels Grayscale values ​​in the green channel; Represents pixels Grayscale values ​​in the blue channel; S3. Calibrating an initial threshold for distinguishing between clumps and background ; ； wherein represents the maximum average gray value in the original image; represents the minimum average gray value in the original image; S4. Select images from the original image that are greater than or equal to the initial threshold. The average grayscale value is stored in the background database, and the values ​​of the original image that are less than the initial threshold are... The average grayscale value is stored in the fragment database; S5. Calculate the average grayscale value in the background database and the average grayscale value in the fragment database, and combine them to form a new threshold. ; ； wherein represents the average value of the average gray value in the background database; represents the average value of the average gray value in the patch database; S6. Replace the initial threshold with the new threshold, and repeat steps S4 and S5 until... At this point, the threshold for differentiation ; Indicates the first i The threshold obtained in +1 iterations Indicates the first i The threshold obtained during round iteration, Indicates threshold error; S7. Use an edge detection operator to sharpen the original image, and then perform binarization classification on the sharpened original image. That is, if the average gray value of the pixels in the sharpened original image is greater than or equal to the discrimination threshold, then the classification is performed. If the gray value is 0, then the gray value of that pixel is recorded as 0; otherwise, it is recorded as 255; and the original image at this time is recorded as a black and white image. S8, each white region in the black and white image represents a piece, calculate the maximum distance between any two pixel points in each piece in the black and white image ; at the same time, set the distance threshold , and record the piece with the maximum distance greater than or equal to the distance threshold as a larger piece, and store it in the larger piece database; S9. Calculate the total number of each larger fragment in the larger fragment database, and based on this total number, calculate the proportion of each maximum distance in the larger fragment database; ； In the formula, Represents the first in the larger fragment database k Maximum distance The proportion in larger fragmented databases; This represents the total number of larger fragments in the larger fragment database. Represents the first in the larger fragment database k Maximum distance The total number in a larger fragmented database; Based on the particle size statistics obtained by the aforementioned particle size analysis method, the material crushing device adjusts its operating state according to the following crushing degree adjustment method, including the following adjustment steps: A1, summing the probabilities of each maximum distance occurring in the database of larger pieces smaller than the set size the sum of the probabilities of each maximum distance occurring in the database of larger pieces smaller than the set size ， ； In the formula, Larger fragments in the database are smaller than the set particle size The sum of the probabilities of each maximum distance occurring; This represents the total number of categories with the largest distance in the larger fragment database; A2. Based on the adjustment principle, determine whether adjustment is necessary; When If the result of the current crushing is determined to be satisfactory, the material crushing device stops operating. When If the current breaking result is not in accordance with the requirement, the moving speed of the saggar and the rotating speed of the rotary cutter (121) need to be adjusted as follows: ； In the formula, represents The current rotation speed variation of the eccentric circle wheel (132); represents the original image sampling period; ； In the formula, represents the current rotational speed variation amount of the intermediate rotary cutterhead (121).

2. A material breaking device according to claim 1, characterised in that The rotating cutter head (121) includes a rotating shaft arranged vertically in the axial direction, and a main cutting edge (1211) installed at the bottom end of the rotating shaft, and each main cutting edge (1211) is evenly distributed around the rotating shaft in sequence.

3. The material crushing device according to claim 2, characterized in that, The rotating cutter head (121) has five groups, with the four groups on the outer side symmetrically distributed around the axis of rotation of the middle group.

4. A material breaking device according to claim 3, wherein The rotating shaft of the middle set of rotating cutter heads (121) passes through the drive gear and is connected to the power mechanism (124) through the belt drive structure (123).

5. A material breaking device according to claim 4, wherein An axially vertically arranged guide sleeve is fixedly installed above the eccentric wheel (132). A guide shaft is coaxially inserted in the guide sleeve, and the sagger is fixedly installed on the top of the guide shaft. A roller is rotatably installed at the bottom of the guide shaft, and the wheel surface of the roller forms a rolling fit with the wheel surface of the eccentric wheel (132). When the roller is at its highest position, the rotating cutter head (121) is inserted into the material in the sagger. When the roller is at its lowest position, the rotating cutter head (121) is separated from the material in the sagger.

6. A material breaking device according to claim 1, wherein The displacement height of the sagger is calculated as follows: ； In the formula, represents the displacement height of the sagger at time t.

Images