Control device and method for crushing system, crushing system, and particle size characteristic calculation device and method

Abstract

To provide a technique that can control a crushing system so as to enable obtaining a desired production amount with respect to a crushed product of a desired particle size division.SOLUTION: A control device for a crushing system according to the present invention comprises an arithmetic unit configured to: calculate a particle size ratio, in which a production amount of a predetermined target particle size division of a crushed product is represented by a ratio with respect to a predetermined reference production amount, from surface shape measurement data representing a surface shape of the crushed product; acquire a load index representing a crushing load applied to a crusher; generate a load index target value for reducing a particle size ratio deviation obtained by subtracting the particle size ratio from a predetermined particle size ratio target value; and generate a control command value for controlling at least one of the crusher and a supply machine from the load index and the load index target value so that the load index is within a reference range based on the load index target value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to techniques for producing a ground product having desired particle size characteristics. [Background technology]

[0002] Conventionally, when generating a particle size distribution of a crushed product crushed by a crusher, the crushed product is sieved with a plurality of test sieves having different mesh sizes, and the frequency of each particle size division of the crushed product is measured based on the mass of the residue on each sieve, and the particle size distribution of the crushed product is generated using these frequencies. In recent years, in-line measurement of the particle size distribution of the crushed product using image processing has been proposed. Patent Document 1 discloses a technology for measuring the particle size distribution state of the crushed product in-line using image processing and producing a crushed product with a particle size distribution according to the purpose.

[0003] Patent Document 1 describes that an optical system unit captures an image of all or part of the crushed product discharged from the crusher, an image analysis unit calculates the particle size and particle size distribution of the crushed product from the captured image, and a raw material supply unit or crushing unit is controlled so that a predetermined particle size and a particle size distribution centered on that particle size are within an allowable range. This image analysis unit binarizes the captured image, recognizes particles as closed curves that reproduce the particle contours on the image, measures the projected area of ​​each particle on the image, and calculates the particle size and particle size distribution by regarding the particle diameter as the diameter of a circle having an area equivalent to the projected area. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-10726 A Summary of the Invention [Problem to be solved by the invention]

[0005] In order to adjust the production volume of the particle size fraction of the crushed product from the crusher that will become the product, it is not important to accurately measure the particle size distribution down to particle size fractions that are much finer than the product, but it is useful to be able to intuitively grasp the production volume of the crushed product in the particle size fraction that will become the product.

[0006] The present disclosure has been made in consideration of the above circumstances, and its purpose is to provide technology that allows one to intuitively grasp the production volume of crushed products of a specified particle size division, and that can control a crushing system so as to obtain a desired production volume of crushed products of a specified particle size division. [Means for solving the problem]

[0007] A control device for a crushing system according to one embodiment of the present disclosure includes: A control device for a crushing system including a crusher and a feeder for feeding objects to be crushed to the crusher, the control device including a calculator, The computing unit includes: Obtaining surface shape measurement data representing a surface shape of the crushed product of the crusher; Calculating a particle size ratio, which is a ratio of a production amount of a predetermined target particle size range of the crushed product to a predetermined reference production amount, from the surface shape measurement data; Obtaining a load index that directly or indirectly represents a crushing load applied to the crusher; generating a load index target value that reduces a granularity ratio deviation obtained by subtracting the granularity ratio from a predetermined granularity ratio target value based on the correlation between the given load index and the granularity ratio and the load index; The control device is configured to generate a control command value for controlling at least one of the crusher and the feeder from the load index and the load index target value so that the load index falls within a reference range based on the load index target value.

[0008] A crushing system according to another aspect of the present disclosure includes: The apparatus includes a crusher, a feeder that feeds materials to be crushed to the crusher, and the control device.

[0009] A method for controlling a crushing system according to yet another aspect of the present disclosure includes: A method for controlling a crushing system including a crusher and a feeder for feeding materials to the crusher, the method comprising the steps of: Obtaining surface shape measurement data representing a surface shape of the crushed product of the crusher; Calculating a particle size ratio, which is a ratio of a production amount of a predetermined target particle size range of the crushed product to a predetermined reference production amount, from the surface shape measurement data; Obtaining a load index that directly or indirectly represents a crushing load applied to the crusher; generating a load index target value that reduces a granularity ratio deviation obtained by subtracting the granularity ratio from a predetermined granularity ratio target value based on the correlation between the given load index and the granularity ratio and the load index; A control command value for controlling at least one of the crusher and the feeder is generated from the load index and the load index target value so that the load index falls within a reference range based on the load index target value.

[0010] According to yet another aspect of the present disclosure, a particle size characteristic calculation device includes: Equipped with a calculator for calculating the particle size characteristics of the crushed product; The computing unit: Obtaining surface shape measurement data representing a surface shape of the crushed product; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; The method is configured to determine a count based on a mass of particles sorted into at least one of the plurality of size classes.

[0011] A particle size characteristic calculation method according to yet another aspect of the present disclosure includes: A method for determining particle size characteristics of a crushed product using a calculator, comprising: Obtaining surface shape measurement data representing a surface shape of the crushed product; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; The count is based on the mass of particles classified into at least one of the plurality of size classes. Effect of the Invention

[0012] According to the present disclosure, a technology can be provided that allows one to intuitively grasp the production volume of crushed products of a specified particle size range, and that can control a crushing system so as to obtain a desired production volume of crushed products of a specified particle size range. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing the overall configuration of a particle size characteristic measuring system including a particle size characteristic calculation device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a block diagram showing a schematic configuration of the particle size characteristic calculation device. [Diagram 3] FIG. 3 is a functional block diagram of the grain size characteristic calculation device. [Figure 4] FIG. 4 is a diagram showing a process flow of the grain size characteristic calculation device. [Diagram 5] FIG. 5 is a diagram showing a process flow of the dimension measurement unit. [Figure 6] FIG. 6 is a diagram showing a schematic configuration of a crushing system according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is a block diagram showing the configuration of a control system of the crushing system. [Figure 8] FIG. 8 is a diagram showing the configuration of a control block related to granularity adjustment of the control device. [Figure 9] FIG. 9 is a block diagram showing an example of the configuration of the load target value generating unit shown in FIG. [Figure 10] FIG. 10 is a graph showing the correlation between the load index and the granularity ratio. [Figure 11]FIG. 11 is a block diagram illustrating an example of the configuration of the control command generating unit illustrated in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a particle size characteristic measuring system 1 equipped with a particle size characteristic calculation device 4 of the present disclosure. The particle size characteristic measuring system 1 shown in FIG. 1 measures the particle size characteristic of the crushed product 10 conveyed by a conveyor 2 in-line. The conveyor 2 includes a conveyor belt 22, a motor 23 for driving the conveyor belt 22 in the conveying direction, and a speed sensor 24 for detecting the speed of the conveyor belt 22. The speed sensor 24 may be a rotation speed sensor for detecting the rotation speed of the motor 23. The crushed product 10 supplied through a chute falls onto the conveyor belt 22 which travels in the conveying direction by the operation of the motor 23. A sedimentary layer of the crushed product 10 (hereinafter referred to as the "crushed product layer 9") is formed on the conveyor belt 22.

[0015] The grain size characteristic measuring system 1 includes a surface profile measuring device 3, a layer thickness measuring device 5, and a grain size characteristic calculating device 4.

[0016] [Surface shape measuring device 3] The surface shape measuring device 3 generates surface shape measurement data representing the surface shape of the crushed product layer 9. The type of surface shape measurement data is not particularly limited as long as it represents the surface shape of the crushed product layer 9, i.e., unevenness. The surface shape measurement data may be, for example, cross-sectional profile data of the crushed product layer 9. The surface shape measurement data may be, for example, area image data obtained by imaging the crushed product layer 9 from above with an area scan camera. In addition, the surface shape measuring device 3 is not particularly limited, and a surface shape measuring device 3 according to the type of surface shape measurement data is adopted.

[0017] In this embodiment, cross-sectional profile data of the crushed product layer 9 is adopted as the surface shape measurement data. In this case, the surface shape measuring device 3 is composed of, for example, a line scan camera 31 and a control panel 32. The line scan camera 31 captures an image of the surface of the crushed product layer 9 in a line shape extending in a width direction (i.e., a depth direction of the paper surface in FIG. 1) perpendicular to the conveying direction of the crushed product 10. The control panel 32 acquires the conveying speed of the crushed product 10 by the conveyor belt 22 based on the detection value of the speed sensor 24 of the conveyor 2, and causes the line scan camera 31 to capture an image in accordance with the conveying speed of the crushed product 10. However, the conveying speed of the conveyor 2 may be a constant value, and in this case, the control panel 32 causes the line scan camera 31 to capture an image in accordance with a predetermined conveying speed of the conveyor 2. The line scan camera 31 captures an image of the surface of the crushed product layer 9 conveyed in the conveying direction by the conveyor belt 22 at a predetermined time interval according to the conveying speed of the crushed product 10. The control panel 32 outputs the line-shaped image data obtained by imaging to the particle size characteristic calculation device 4. By arranging and connecting a large number of line-shaped image data (i.e., surface shape measurement data) obtained in this manner in chronological order, area image data representing the surface shape of the crushed product layer 9 can be obtained.

[0018] Alternatively, the surface shape measuring device 3 is composed of a three-dimensional profile measuring device and a control panel. The three-dimensional profile measuring device has a probe equipped with a projector that irradiates a laser onto the surface of the crushed product layer 9 in a line extending in the width direction (i.e., the depth direction of the paper surface in FIG. 1) perpendicular to the conveying direction of the crushed product 10, and a photoreceiver that acquires the reflected light. The profile measuring device obtains cross-sectional profile data perpendicular to the conveying direction of the crushed product layer 9 by calculating the distance to the measurement target based on the phase difference between the projected wavelength and the received wavelength. The control panel acquires the conveying speed of the crushed product 10 by the conveyor belt 22 based on the detection value of the speed sensor 24 of the conveyor 2, and causes the profile measuring device to perform measurement in accordance with the conveying speed of the crushed product 10. However, the conveying speed of the conveyor 2 may be a constant value, and in this case, the control panel causes the profile measuring device to perform measurement in accordance with a predetermined conveying speed of the conveyor 2. The profile measuring device measures the distance to the surface of the crushed product layer 9 being transported in the transport direction by the conveyor belt 22 at a predetermined time interval according to the transport speed of the crushed product 10. The control panel outputs the cross-sectional profile data obtained by the measurement to the particle size characteristic calculation device 4. By arranging and connecting a large number of cross-sectional profile data (i.e., surface shape measurement data) obtained in this manner in chronological order, area image data representing the surface shape of the crushed product layer 9 can be obtained.

[0019] In the surface profile measuring device 3 exemplified above, the crushed product layer 9 moves in the conveying direction by the transport conveyor 2, so the camera or probe performs the measurement at a fixed position, but the crushed product layer 9 may be in a fixed position and the camera or probe may perform the measurement while moving. In other words, the measurement may be performed in a manner in which the camera or probe moves relative to the crushed product layer 9.

[0020] [Layer thickness measuring device 5] The layer thickness measuring device 5 measures the layer thickness of the crushed product layer 9. The layer thickness of the crushed product layer 9 is the height from the surface of the conveyor belt 22 of the transport conveyor 2 to the upper surface of the crushed product layer 9. The layer thickness measuring device 5 may be, for example, a non-contact laser distance sensor. The layer thickness measuring device 5 measures the layer thickness of the crushed product layer 9 at the same location as the measurement target location of the surface profile measuring device 3, in synchronization with the surface profile measurement data of the surface profile measuring device 3. The layer thickness measuring device 5 can measure the surface height of the conveyor belt 22 and the surface height of the crushed product layer 9, and the layer thickness of the crushed product layer 9.

[0021] [Particle size characteristic calculation device 4] The particle size characteristic calculation device 4 acquires the surface profile measurement data generated by the surface profile measuring device 3 and the layer thickness data measured by the layer thickness measuring device 5, and generates a particle size distribution of the crushed product 10 based on the data. The particle size characteristic calculation device 4 is connected to the surface profile measuring device 3 so as to be able to communicate with the surface profile measuring device 3 via wire or wirelessly. The particle size characteristic calculation device 4 may be disposed near the surface profile measuring device 3, or may be disposed at a remote location away from the surface profile measuring device 3. Also, one particle size characteristic calculation device 4 may be provided for multiple surface profile measuring devices 3.

[0022] FIG. 2 is a block diagram showing a schematic configuration of the grain size characteristic calculation device 4. As shown in FIG. 2, the grain size characteristic calculation device 4 includes a calculator 400. Each functional unit of the grain size characteristic calculation device 4 described later may be configured with at least one calculator 400, or two or more of the functional units may be configured with one calculator 400. The calculator 400 is a so-called computer including a processor 401, a memory 402 such as a ROM and a RAM, and an I / O 403. A storage unit 405, a display 407, a surface shape measuring device 3, and a layer thickness measuring device 5 are connected to the calculator 400 via an interface 404.

[0023] Fig. 3 is a functional block diagram of the grain size characteristic calculation device 4. As shown in Fig. 3, the grain size characteristic calculation device 4 has each of the functional parts of a dimension measurement unit 41, a grain size classification unit 42, a frequency calculation unit 43, and a grain size characteristic information generation unit 44. The processing of these functional parts will be explained below with reference to the flowchart shown in Fig. 4.

[0024] <Dimensional measurement section 41> The dimension measuring unit 41 acquires the surface shape measurement data generated by the surface shape measuring device 3 (step S1), and performs image processing on the surface shape measurement data to measure the dimensions of particles appearing in the target range on the surface of the crushed product layer 9 (step S2). The particle dimensions to be measured include, for example, the long axis diameter L and short axis diameter W of the particle. The analysis method for measuring the long axis diameter L and short axis diameter W of the particle from the image is not particularly limited, and any known method may be used. An example of a method for measuring the long axis diameter L and short axis diameter W of the particle by the dimension measuring unit 41 will be described below, but the measurement method is not limited thereto.

[0025] FIG. 5 is a diagram showing the flow of processing of the dimension measurement unit 41. As shown in FIG. 5, the dimension measurement unit 41 according to this embodiment performs preprocessing such as extracting the target range and removing the conveyor surface on the surface shape measurement data in advance, and then performs three-dimensional processing on the surface shape measurement data to obtain a three-dimensional image of the surface of the target range of the crushed product layer 9. The target range may be, for example, an arbitrary length area of ​​about 1 m to 10 m in the conveying direction. The dimension measurement unit 41 performs image segmentation on the obtained three-dimensional image to obtain a segmentation image in which the contours of each particle appearing in the target range are projected. Furthermore, the dimension measurement unit 41 removes abnormal values ​​and noise from the segmentation image, and then performs minimum box processing to obtain the major axis diameter L and minor axis diameter W of each particle. In the minimum box processing, the smallest box that contacts the contour of the particle is obtained for each particle included in the segmentation image, and the major axis length of the box is set to the major axis diameter L of the particle, and the minor axis length of the box is set to the minor axis diameter W of the particle. For example, the contour of a particle included in a segmentation image is sandwiched between two first parallel lines that touch the contour, and the minimum distance between the two first parallel lines is defined as the minor axis diameter W of the particle. The contour of the particle is sandwiched between two second parallel lines that are perpendicular to the two first parallel lines and touch the contour of the particle, and the minimum distance between the two second parallel lines is defined as the major axis diameter L of the particle.

[0026] <Particle size classification section 42> Returning to FIG. 4, the particle size classifying unit 42 classifies each particle appearing in a target range on the surface of the crushed product layer 9 into one of a plurality of predetermined particle size categories (step S3).

[0027] The memory 405 stores information prescribing a plurality of particle size categories. The particle size categories are defined by particle size ranges consisting of upper and lower limits. The plurality of particle size categories have particle size ranges that do not overlap with each other. The particle size categories may correspond to the nominal mesh size defined in JIS8801 "Test Sieves". However, the particle size categories do not have to correspond to the nominal mesh size. For example, particle size ranges divided at irregular intervals or at equal intervals may be used as particle size categories. If the particle size categories are set according to the intervals at which the control value is increased or decreased when adjusting the particle size by the crusher 100, it becomes easy to match the particle size with the control of the crusher 100.

[0028] The particle size classification unit 42 uses one or more of the particle size values ​​measured by the surface shape measuring device 3 as a "dimension index". The dimension index may be at least one of the particle size values ​​(e.g., major axis diameter L and minor axis diameter W) measured by the surface shape measuring device 3, or may include an average value of the measured dimension values. "Dimension index-particle size class correspondence information 408" representing the correspondence relationship between the particle size class and the range of the dimension index corresponding to the particle size class is stored in advance in the memory 405. The dimension index-particle size class correspondence information 408 is obtained by sieving the crushed product 10 using a physical sieve corresponding to the particle size class, measuring the dimension index of the crushed product 10 remaining on the sieve, determining the correspondence relationship between the particle size class and the range of the dimension index, and storing the obtained information. The dimension index-particle size class correspondence information 408 varies depending on the specifications and parameter settings of the crusher 100 and the type of the crushed product 10.

[0029] The particle size classification unit 42 virtually classifies each particle appearing in a target range on the surface of the crushed product layer 9 into one of the particle size classes based on the particle size index, using the size index-particle size class correspondence information 408. Specifically, the particle size classification unit 42 refers to the size index-particle size class correspondence information 408 to identify the particle size class into which the particle's size index falls, and classifies the particle into that particle size class. In this way, each of the multiple particles of the crushed product 10 is classified into one of the multiple particle size classes.

[0030] <Frequency calculation unit 43> The frequency calculation unit 43 calculates the frequency of each particle size division (step S4). The frequency of a particle size division is the ratio of the mass of particles classified into the particle size division to the total mass of the crushed product 10 to be measured, and is expressed as a percentage. The frequency of a particle size division indicates what percentage of the mass of particles with a particle size equal to or larger than the particle size of the particle size division is in the whole (i.e., cumulative distribution (above sieve)). However, the frequency of a particle size division may be what percentage of the mass of particles in each particle size division is in the whole (i.e., frequency distribution) or what percentage of the mass of particles with a particle size equal to or smaller than the particle size division is in the whole (i.e., cumulative distribution (under sieve)). The mass of particles classified into a particle size division can be calculated from, for example, the size index and density of the particles classified into the particle size division. However, the method of calculating the mass of particles classified into a particle size division is not limited to this.

[0031] <Particle size characteristic information generation unit 44> The particle size characteristic information generating unit 44 generates at least one piece of particle size characteristic information of the crushed product 10 using the frequency of each particle size division calculated by the frequency calculating unit 43 (step S5).

[0032] The particle size characteristic information includes information that indicates the particle size tendency of the crushed product 10, such as the frequency of a desired particle size division, the mode, and the maximum particle size division. For example, the particle size characteristic information generating unit 44 obtains the frequency of a particle size division that meets a predetermined product standard. The particle size division that meets the product standard is not limited to one particle size division, and may span a plurality of particle size divisions. The production volume of the product can be estimated by the frequency of the particle size division that meets the predetermined product standard. Also, for example, the particle size characteristic information generating unit 44 obtains the frequency of a particle size division that does not meet the predetermined product standard. The mass of the crushed product 10 that is crushed again by the crusher 100 can be estimated by the frequency of the particle size division that does not meet the product standard. Also, for example, the particle size characteristic information generating unit 44 obtains information that indicates the particle size tendency of the crushed product 10, such as the frequency of the particle size division with the maximum frequency (i.e., the mode) and the particle size division with the maximum particle size.

[0033] The particle size characteristic information includes the particle size distribution of the crushed product 10. The particle size characteristic information generating unit 44 generates a particle size distribution by plotting the frequency on a graph whose vertical axis represents mass percentage [%] and whose horizontal axis represents particle size. The particle size distribution may be either an accumulation distribution (oversieve or undersieve) in which the particle size is represented by a particle size accumulation curve, or a frequency distribution in which the particle size is represented by a frequency curve or a bar.

[0034] The particle size characteristic calculation device 4 outputs the particle size characteristic information of the crushed product 10 generated as described above to a display 407 or the like.

[0035] The particle size characteristic information of the crushed product 10 displayed on the display 407 can be visually confirmed by an operator of the crusher 100, and the particle size characteristic information of the crushed product 10 may be used by the operator to manually control the crusher 100. For example, the particle size characteristic measurement system 1 measures the particle size characteristics of the crushed product 10 discharged from the crusher 100 at a predetermined timing or continuously during operation of the crusher 100, and displays the current particle size characteristic information of the crushed product 10 on the display 407. Here, the particle size characteristic measurement system 1 may display the coarse and fine changes in the particle size state of the crushed product 10 as a time series change of an arbitrary % particle size in a distribution curve of the cumulative % of the particle size distribution. For example, the time series change of the particle size (80% particle size, P80) at which the relative particle amount is 80% in the distribution curve of the cumulative % of the particle size distribution is displayed on the display 407. The operator of the crusher 100 can visually confirm the change in the 80% particle size displayed on the display 407. An operator who visually checks the time series change in the arbitrary % particle size can manually set the crusher 100 based on the time series change in the arbitrary % particle size and the particle size distribution.

[0036] Furthermore, the particle size characteristic information of the crushed product 10 may be output to the control device 150 of the crusher 100 and used for automatic control of the crusher 100 by the control device 150. In the following, an example in which the particle size characteristic information of the crushed product 10 is applied to the control of the crushing system 11 equipped with the gyratory crusher 100 will be described.

[0037] [Outline of the crushing system 11] 6 is a diagram showing a schematic configuration of a crushing system 11 according to an embodiment of the present disclosure. The crushing system 11 shown in FIG. 6 includes a crusher 100, a supply conveyor 109, a transport conveyor 2, a particle size characteristic measuring system 1, and a control device 150.

[0038] The crusher 100 is a gyratory crusher such as a gyratory crusher or a cone crusher, and the configuration of the crusher 100 itself is known. However, the crusher 100 provided in the crushing system 11 according to the present disclosure is not limited to a gyratory crusher, and may be another type of crusher. The crusher 100 includes a frame 130 consisting of an upper frame 131 and a lower frame 132 connected thereto. A machine body central axis A extending vertically is defined in the center of the internal space of the frame 130. A hopper 103 is connected to the upper part of the frame 130. Raw materials are supplied to the hopper 103 from a supply conveyor 109, which is a supply device for raw materials to be crushed. The supply conveyor 109 includes an endless belt and a motor 109a that rotates and drives the endless belt.

[0039] The main shaft 105 is disposed approximately in the center of the frame 130. The central axis of the main shaft 105 is inclined with respect to the central axis A of the aircraft. The upper end of the main shaft 105 is supported by the upper frame 131 via an upper bearing 117. The upper bearing 117 is provided on a spider 118 that protrudes inward from the upper end of the upper frame 131. The lower end of the main shaft 105 is supported by a ram 161 of the bearing cylinder 106 via a main shaft thrust bearing 102. The bearing cylinder 106 is composed of a cylinder tube 162 and the ram 161 that slides within the cylinder tube 162. A hydraulic circuit 190 is connected to a hydraulic chamber 163 of the bearing cylinder 106, and the ram 161 operates when the hydraulic circuit 190 changes the hydraulic pressure in the hydraulic chamber 163.

[0040] A lower portion of the main shaft 105 is rotatably inserted into the eccentric sleeve 104. The eccentric sleeve 104 is rotatably inserted into a boss 107 formed on the lower frame 132. A lower portion of the eccentric sleeve 104 is supported by the lower frame 132 via a thrust sliding bearing 123.

[0041] A mantle core 112 is fixed to the upper part of the main shaft 105. The outer surface of the mantle core 112 is a frusto-conical surface. A mantle 113 is attached to the outer surface of the mantle core 112. The outer surface of the mantle 113 is a frusto-conical surface. The outer surface of the mantle 113 faces the inner surface of a concave 114 provided on the inner surface of the upper frame 131. The inner surface of the concave 114 and the outer surface of the mantle 113 form a crushing chamber 116 having a wedge-shaped vertical cross section. The raw material supplied to the hopper 103 flows into the crushing chamber 116 by its own weight.

[0042] A cylindrical partition plate 124 is provided above the boss 107. This partition plate 124 forms a hydraulic chamber 127 above the eccentric sleeve 104 and the boss 107 and below the mantle core 112. Lubricant is supplied from this hydraulic chamber 127 between the outer circumferential surface of the main shaft 105 and the inner circumferential surface of the eccentric sleeve 104, and between the outer circumferential surface of the eccentric sleeve 104 and the inner circumferential surface of the boss 107. A main shaft bearing 110 is formed between the outer circumferential surface of the main shaft 105 and the inner circumferential surface of the eccentric sleeve 104, and a sleeve bearing 111 is formed between the outer circumferential surface of the eccentric sleeve 104 and the inner circumferential surface of the boss 107. The main shaft bearing 110 and the sleeve bearing 111 are both journal sliding bearings. The multiple bearing formed by the main shaft bearing 110 and the sleeve bearing 111 is the lower bearing.

[0043] A driving motor 108 is disposed outside the frame 130. Power is transmitted from an output shaft 108a of the driving motor 108 to the eccentric sleeve 104 via a power transmission mechanism 120. The power transmission mechanism 120 includes a pulley 122a provided on the output shaft 108a, a horizontal shaft 121, a pulley 122b provided on the horizontal shaft 121, a power transmission belt 122c wound around the pulleys 122a and 122b, a bevel pinion 119a provided on the horizontal shaft 121, and a bevel gear 119b provided on the eccentric sleeve 104. The horizontal shaft 121 is supported by the lower frame 132 via a horizontal shaft bearing 125. When the eccentric sleeve 104 rotates, the main shaft 105 performs a revolution motion eccentric to the machine body central axis A, a so-called precession motion. As a result, the distance between the outer surface of the mantle 113 and the inner surface of the concave 114 changes depending on the rotational position of the main shaft 105. The raw material that has fallen into the crushing chamber 116 is crushed between the concave 114 and the mantle 113, and is discharged below the lower frame 132. A transport conveyor 2 is provided below the lower frame 132. The crushed product 10 discharged from the crusher 100 falls onto the conveyor belt 22 of the transport conveyor 2. While the crushed product 10 is transported by the transport conveyor 2, the particle size characteristics are measured and monitored by the particle size characteristics measurement system 1.

[0044] [Configuration of the control device 150] The control device 150 is not necessarily arranged in close proximity to other components of the crushing system 11, and may be arranged remotely from other components of the crushing system 11. For example, the control device 150 may be configured on a network server, and the control device 150 may control the crushing system 11 via the network.

[0045] The control device 150 includes a calculator 500. Each of the functional units of the control device 150 described later may be configured with at least one calculator 500, or two or more of the functional units may be configured with one calculator 500. The calculator 500 is a so-called computer that includes a processor, memories such as ROM and RAM, and I / O. FIG. 7 is a block diagram showing the configuration of the control system of the crushing system 11. As shown in FIG. 7, the control device 150 is connected to a memory 157, a display 158, a setting device 159, various instruments (set sensor 152, crushing load detector 155), a control target (drive motor 108, motor 109a, hydraulic circuit 190), and a particle size characteristic measurement system 1. The display 158 may be a display or a touch panel. The display 158 may be located remotely from the control device 150 and the crusher 100. The setter 159 is a device for inputting a set value such as a target grain size to the control device 150, and may be, for example, a keyboard, a touch panel, or a pointing device. In this embodiment, the hydraulic force of the hydraulic chamber 163 is a load index Lact that directly or indirectly indicates the crushing load, and the crushing load detector 155 detects the hydraulic force of the hydraulic chamber 163 as the load index Lact and outputs it to the control device 150. Here, the "crushing load" means the load applied to the moving parts of the crusher 100 due to crushing. Therefore, the index of the crushing load is not limited to the hydraulic force of the hydraulic chamber 163, but may be the motor load of the drive motor 108. In this case, the crushing load detector 155 is a detector of the motor current of the drive motor 108.

[0046] The control device 150 controls the amount of raw material supplied by the supply conveyor 109. The control device 150 is connected to the motor 109a of the supply conveyor 109 wirelessly or by wire. The control device 150 transmits a command signal corresponding to a target supply amount to the motor 109a of the supply conveyor 109. The motor 109a operates in response to the command signal from the control device 150, whereby the target supply amount of raw material is supplied from the supply conveyor 109 to the hopper 103.

[0047] The control device 150 controls the size (set) of the crushing gap between the two crushing surfaces, the concave 114 and the mantle 113, to a set target value. The set in this embodiment is the size of the gap at the narrowest position of the crushing gap (closed side set). In the crusher 100 according to this embodiment, the bearing cylinder 106 functions as a set adjustment device. When the main shaft thrust bearing 102 moves up and down together with the ram 161, the mantle 113 moves up and down relative to the concave 114, and the size of the set changes. The size of the set determines the grain size of the crushed material. The control device 150 is connected wirelessly or by wire to a set sensor 152 that detects the set. The set sensor 152 is, for example, a displacement sensor that detects the displacement of the ram 161, and the size of the set estimated from the position of the ram 161 is obtained. The control device 150 acquires information detected by the set sensor 152, and generates cylinder oil pressure in the hydraulic chamber 163 of the bearing cylinder 106 via the hydraulic circuit 190 to change the position of the ram 161 so that the set detection value detected by the set sensor 152 becomes the set target value.

[0048] The control device 150 adjusts the particle size characteristics of the crushed product 10. For example, the particle size characteristics of the crushed product 10 are adjusted so that the frequency of a desired particle size range that meets the product standard is the most frequent value, so that the production volume of a desired particle size range that meets the product standard is maximized. Also, for example, the particle size characteristics of the crushed product 10 are adjusted so that the frequency of a predetermined particle size range is minimized, so that the production volume of a predetermined particle size range that does not meet the product standard is suppressed.

[0049] Fig. 8 is a diagram showing the configuration of a control block related to particle size adjustment of the control device 150. As shown in Fig. 8, the control device 150 includes a particle size ratio calculation unit 91, a load target value generation unit 92, and a control command generation unit 93. In the crushing system 11 of this embodiment, the particle size characteristics measurement system 1 is described as an element independent of the control device 150, but the function of the particle size characteristics measurement system 1 may be combined with the control device 150, and the particle size characteristics measurement system 1 may be configured as one of the functional parts of the control device 150.

[0050] 《Particle size ratio calculation section 91》 The grain size ratio calculation unit 91 acquires grain size characteristic information obtained from the grain size characteristic measurement system 1, and calculates the grain size ratio Ract of a grain size range of interest (hereinafter referred to as the "target grain size range") for the crushed product 10 to be measured. The grain size ratio Ract is expressed as the ratio of the production volume Sact of a certain grain size range to the total production volume Sall for the crushed product 10 to be measured. The grain size ratio of a certain grain size range is related to the production volume of that grain size range, and the production volume increases as the grain size ratio increases.

[0051] In this embodiment, the grain size ratio Ract corresponds to the frequency of the target grain size division obtained by the grain size characteristic calculation device 4 of the grain size characteristic measurement system 1. Therefore, the grain size ratio calculation unit 91 may take the frequency of the target grain size division obtained from the grain size characteristic measurement system 1 as the grain size ratio Ract. Alternatively, the grain size characteristic calculation device 4 may also have the function of the grain size ratio calculation unit 91. That is, the grain size ratio calculation unit 91 obtains surface shape measurement data of the crushed product 10, obtains a size index representing particle dimensions for a plurality of particles of the crushed product 10 from the surface shape measurement data by image processing, classifies the plurality of particles into a plurality of predetermined grain size divisions based on the size index, obtains a frequency based on the number of particles classified into the target grain size division, and sets the frequency of the target grain size division as the grain size ratio Ract.

[0052] <<Load target value generating unit 92>> Fig. 9 is a block diagram showing an example of the configuration of the load target value generation unit 92 shown in Fig. 8. The load target value generation unit 92 includes a subtractor 172, a control gain multiplier 173, a limiter 164, an adder 165, and a holding circuit 166. The load target value generation unit 92 acquires the calculated granularity ratio Ract and a given granularity ratio target value Rr, and generates, by calculation, a load index target value Lr that reduces a granularity ratio deviation ΔR obtained by subtracting the granularity ratio Ract from the granularity ratio target value Rr.

[0053] The subtractor 172 calculates a particle size ratio deviation ΔR, which is the deviation between the particle size ratio target value Rr and the current particle size ratio Ract calculated by the particle size ratio calculation unit 91.

[0054] The control gain multiplier 173 multiplies the particle size ratio deviation ΔR by the control gain Kr to calculate the load deviation ΔLr. When the particle size ratio deviation ΔR is small, for example, within a predetermined range including 0, the particle size ratio deviation ΔR input to the control gain multiplier 173 may be set to 0, or the load deviation ΔLr output from the control gain multiplier 173 may be set to 0. The load target value generating unit 92 sets the control gain Kr based on the load index Lact detected by the crushing load detector 155 and the correlation between the load index Lact and the particle size ratio Ract. For this purpose, data indicating the correlation between the load index Lact and the particle size ratio Ract according to the crusher 100 is stored in advance in the memory 157.

[0055] FIG. 10 is a graph showing the correlation between the load index and the particle size ratio in this embodiment. The graph shown in FIG. 10 has the load pressure [MPa] corresponding to the load index on the horizontal axis and the particle size ratio [%] on the vertical axis, and shows that there is a nonlinear correlation between the change in the particle size ratio and the change in the load pressure. That is, the load pressure in the crusher 100 can be regarded as crushing energy, and when the load pressure is low, the object to be crushed is difficult to crush and the particle size of the crushed product 10 becomes large, while when the load pressure is high, the object to be crushed is easy to crush and the particle size of the crushed product 10 becomes small. Based on this correlation, it is possible to convert the particle size ratio target value Rr that the operator can intuitively set into the load index target value Lr used for load stabilization control to stabilize the crushing load. That is, the load target value generating unit 92 generates the load index target value Lr based on the detected load index and the correlation between the load index and the particle size ratio.

[0056] The correlation data is data in which a load index Lact, which indicates the load pressure when the crushing system 11 is actually operated, is associated with an actual value of a predetermined particle size ratio. The actual value of the predetermined particle size ratio corresponds to the particle size ratio that is the target particle size ratio value Rr. For example, when the particle size ratio target value Rr is set with attention focused on the ratio of the production volume of the first product to the total production volume, the actual value of the ratio of the production volume of the first product to the total production volume is associated with the load index Lact as the actual value of the particle size ratio in the correlation data created in advance.

[0057] The load target value generating unit 92 calculates a control gain Kr for converting the granularity ratio target value Rr into the load index target value Lr from the correlation data stored in advance in the storage device 157. When non-linear correlation data is used, the slope of the tangent to the curve A1 at the position of the granularity ratio target value Rr is calculated as the control gain Kr. When linear correlation data is used, the slope of the straight line A2 is calculated as the control gain Kr. The calculated control gain Kr is set as the control gain Kr by which the granularity ratio deviation correction value ΔRc is multiplied in the control gain multiplier 173. According to this configuration, the correlation stored in advance in the storage device 157 is used to convert a value for the granularity ratio into a value for the load index, so that the load index target value Lr can be generated by a simple calculation.

[0058] The limiter 164 limits the load deviation ΔLr output from the control gain multiplier 173 to within a predetermined limit range E. For example, when the load deviation ΔLr exceeds an upper limit value of the limit range E that is greater than 0, the limiter 164 outputs the upper limit value as the load deviation correction value ΔLrc. When the load deviation ΔLr falls below a lower limit value of the limit range E that is less than 0, the limiter 164 outputs the lower limit value as the load deviation correction value ΔLrc. When the load deviation ΔLr is within the limit range E, the limiter 164 outputs the load deviation ΔLr as is as the load deviation correction value ΔLrc. Such a limiter 164 suppresses a sudden change in the load index target value Lr.

[0059] The limit range E may be changeable according to the detected load index Lact. When the load index target value Lr is calculated using data of a non-linear correlation, the limit range E may be set small when the current load index Lact is small, and set large when the current load index Lact is large. This allows the limit range E to be appropriately set according to the rate of change in the granularity ratio. Note that when the load index target value Lr is calculated using a linear correlation as shown by the straight line A2, the size of the limit range E in the limiter 164 may be fixed.

[0060] The holding circuit 166 holds for a predetermined time the load index target value Lr output from the load target value generation unit 92. The adder 165 adds the load deviation correction value ΔLrc output from the limiter 164 to the past load index target value Lrp held in the holding circuit 166. That is, the load target value generation unit 92 calculates the load deviation correction value ΔLrc as the amount of change in the target value with respect to the past load index target value Lrp, and generates a new load index target value Lr by adding the load deviation correction value ΔLrc to the past load index target value Lrp.

[0061] <<Control command generating unit 93>> The control command generating unit 93 acquires the load index Lact detected by the crushing load detector 155, and generates a control command value MV for the crushing system 11 based on the load index target value Lr and the load index Lact generated by the load target value generating unit 92.

[0062] Fig. 11 is a block diagram showing an example of the configuration of the control command generating unit 93 shown in Fig. 8. The control command generating unit 93 includes a subtractor 168 and a control calculator 169. The subtractor 168 calculates a load deviation actual value ΔL by subtracting the current load index Lact from the load index target value Lr. Note that the load index Lact input to the subtractor 168 may be the load index Lact after noise has been removed by a predetermined filter.

[0063] The control calculator 169 applies a predetermined control algorithm to the load deviation actual value ΔL to generate a control command value MV. For example, the control calculator 169 includes a PID controller having a proportional element, an integral element, and a derivative element. Alternatively, the control calculator 169 may include a P controller having a proportional element, a PI controller having a proportional element and an integral element, or a PD controller having a proportional element and a derivative element.

[0064] The control command generating unit 93 outputs the control command value MV generated according to the above control algorithm. When the load deviation actual value ΔL is small, for example, within a predetermined range including 0, the load deviation actual value ΔL input to the control computing unit 169 may be set to 0, or the control computing unit 169 may output the same control command value MV as the previous control command value MV. The control command generating unit 93 may include a limiter that limits the control command value MV generated by the control computing unit 169 to within a predetermined limit range.

[0065] The control device 150 operates the control object according to the control command value MV generated by the control command generating unit 93. When the control object is the hydraulic circuit 190, the amount of hydraulic oil supplied to the hydraulic chamber 163 is controlled according to the control command value MV, and the size of the set is adjusted. In this embodiment, the set is changed by adjusting the hydraulic pressure of the bearing cylinder 106 to increase or decrease the crushing load, but instead, the crushing load may be increased or decreased by increasing or decreasing the amount of raw material supplied by the supply conveyor 109. In this case, the control object is the motor 109a of the supply conveyor 109, and the amount of material supplied to the crusher 100 by the supply conveyor 109 is controlled according to the control command value MV.

[0066] According to the control by the control device 150, at least one of the crusher 100 or the supply conveyor 109 is controlled so that the load index Lact falls within a reference range based on the load index target value Lr. This makes it possible to suppress load fluctuations over a short period of time and operate the crushing system 11 stably.

[0067] In addition, according to the control by the control device 150, the crushed product 10 of the target particle size range is The load index target value Lr is calculated using the particle size ratio Ract, which expresses the production amount Sact of the crushed product 10 as a ratio to a predetermined reference production amount Sall, and the correlation between the load index Lact and the particle size ratio Ract. Therefore, the operator can intuitively set the control target value of the crushing system 11 based on the production amount Sact of the crushed product 10 of the particle size classification of interest. In addition, the production amount Sact of the crushed product 10 is obtained by averaging over a relatively long time. Therefore, by generating the load index target value Lr such that the particle size ratio Ract obtained based on the production amount Sact of the crushed product 10 of the particle size classification of interest becomes the particle size ratio target value Rr, the crushing system 11 can be operated with both stability and an optimal production balance.

[0068] [Summary] The first item of the present disclosure is a control device 150 for a crushing system 11 including a crusher 100 and a feeder (in the above embodiment, a feed conveyor 109) for feeding materials to the crusher 100, The control device 150 includes computing units 400 and 500. The computing units 400 and 500 are Obtaining surface shape measurement data representing the surface shape of the crushed product 10 of the crusher 100; A particle size ratio Ract is calculated from the surface shape measurement data, which is a ratio of the production amount Sact of a predetermined target particle size division of the crushed product 10 to a predetermined reference production amount Sall. A load index Lact that directly or indirectly represents the crushing load applied to the crusher 100 is obtained; generating a load index target value Lrp that reduces a granularity ratio deviation ΔR obtained by subtracting the granularity ratio Ract from a predetermined granularity ratio target value Rr based on the correlation between a given load index and a granularity ratio and the load index Lact; It is configured to generate a control command value MV for controlling at least one of the crusher 100 and the feeder 109 from the load index Lact and the load index target value Lr so that the load index Lact is within a reference range based on the load index target value Lr.

[0069] According to the above configuration, the load index target value Lr is calculated using the particle size ratio Ract, which expresses the production amount of the crushed product 10 of the target particle size division as a ratio to a predetermined reference production amount, and the correlation between the load index and the particle size ratio. In other words, the production amount of the crushed product 10 is adjusted according to the tendency of the production amount of the crushed product 10 of the target particle size division. Since the particle size ratio Ract directly expresses the amount of production of the crushed product 10 of the target particle size division, the amount of production of the crushed product 10 of the target particle size division can be intuitively grasped.

[0070] Furthermore, according to the above configuration, at least one of the crusher 100 and the feeder 109 is controlled so that the load index Lact falls within a reference range based on the load index target value Lr. This makes it possible to suppress load fluctuations over a short period of time and operate the crushing system 11 stably. Therefore, by generating a load index target value Lr such that the particle size ratio Ract obtained based on the current production volume of the crushed product 10 of the target particle size classification becomes the particle size ratio target value Rr, it is possible to operate the crushing system 11 while achieving both stability and an optimal production balance.

[0071] The control device 150 of the crushing system 11 according to the second aspect of the present disclosure is the control device 150 according to the first aspect, wherein the calculators 400 and 500 obtain size indicators representing particle sizes of a plurality of particles appearing on the surface of the crushed product 10 by image processing from the surface shape measurement data; The frequency of the target particle size range of the crushed product 10 is obtained based on the size index, and the particle size ratio Ract is calculated from the frequency of the target particle size range.

[0072] The control device 150 of the crushing system 11 relating to the third item of the present disclosure is the control device 150 relating to the second item, which is provided with a memory 157 that stores a range of dimension indexes corresponding to a target particle size classification, and the calculators 400, 500 are configured to classify particles having a dimension index that falls within the range of the dimension index corresponding to the target particle size classification into the target particle size classification, and to calculate a frequency from the mass of particles classified into the target particle size classification.

[0073] According to the control device 150 relating to the second and third items, the granularity ratio Ract can be obtained by a simple calculation.

[0074] The control device 150 of the crushing system 11 relating to the fourth item of the present disclosure is a control device 150 relating to any of the first to third items, in which the target particle size range is a particle size range of a specified product standard of the crushed product 10.

[0075] The control device 150 of the crushing system 11 relating to the fifth item of the present disclosure is a control device 150 relating to any of the first to third items, in which the target particle size range is a particle size range of the crushed product 10 that is outside the specified product standard.

[0076] As with the control device 150 according to the fourth and fifth items, the target particle size range can be set arbitrarily depending on the purpose. By setting the target particle size range as a particle size range of a predetermined product standard of the crushed product 10 and setting the particle size ratio target value Rr larger than the particle size ratio Ract, the production volume of the crushed product 10 that meets the product standard can be increased. Also, by setting the target particle size range as a particle size range outside the predetermined product standard of the crushed product 10 and setting the particle size ratio target value Rr smaller than the particle size ratio Ract, the production volume of the crushed product 10 that does not meet the product standard can be reduced.

[0077] The control device 150 of the crushing system 11 relating to the sixth item of the present disclosure is a control device 150 relating to any of the first to fifth items, in which the calculators 400, 500 obtain size indices representing particle dimensions for a plurality of particles appearing on the surface of the crushed product by image processing from the surface shape measurement data, and are provided with a plurality of particle size classifications in which particle size ranges are divided at equal intervals, and are configured to classify the plurality of particles into a plurality of particle size classifications including a target particle size classification based on the size indices, and calculate a particle size ratio from the frequency of the target particle size classification.

[0078] According to the control device 150 of the above configuration, a particle size classification in which the particle size range is divided at equal intervals is used, making it easier to match the increase or decrease in the control value of the crushing system 11 with changes in particle size, thereby improving the accuracy of particle size adjustment of the crushing system 11.

[0079] The control device 150 of the crushing system 11 relating to the seventh item of the present disclosure is a control device 150 relating to any of the first to sixth items, in which the crushing system 11 includes a transport conveyor 2 for transporting the crushed product 10 and a surface shape measuring device 3 for measuring the surface shape of the crushed product 10 transported by the transport conveyor 2, and the computing units 400, 500 are configured to acquire surface shape measurement data generated by the surface shape measuring device 3.

[0080] According to the control device 150 relating to the seventh item, it is possible to utilize the surface shape measurement data of the crushed product 10 that has just been discharged from the crusher 100 in-line, so that inspection can be carried out efficiently without stopping the flow of the production line, and control can be performed according to the current operating status of the crusher 100.

[0081] The control device 150 of the crushing system 11 relating to the eighth item of the present disclosure is a control device 150 relating to any of the first to seventh items, in which the calculators 400, 500 are configured to set a control gain Kr based on the correlation with the load index Lact, calculate a load deviation ΔLr from the particle size ratio deviation ΔR using the control gain Kr, and generate a load index target value Lr based on the load deviation ΔLr.

[0082] According to the control device 150 according to the eighth aspect, the load index target value Lr is generated from the granularity ratio deviation ΔR using the control gain Kr, so that the conversion from the granularity ratio target value Rr to the load index target value Lr can be easily realized with a simple configuration.

[0083] The control device 150 of the crushing system 11 relating to the ninth item of the present disclosure is the control device 150 relating to the eighth item, in which the calculators 400, 500 include a control gain multiplier 173 that multiplies the particle size ratio Ract deviation by a control gain Kr, and a limiter 164 that limits the output of the control gain multiplier 173 to a predetermined limit range E, and the limit range E is set according to the acquired load index Lact.

[0084] According to the control device 150 according to the ninth aspect, the limit range E can be appropriately set in accordance with the rate of change of the granularity ratio Ract.

[0085] The crushing system 11 according to the tenth item of the present disclosure comprises a crusher 100, a feeder 109 for supplying material to be crushed to the crusher 100, and a control device 150 according to any one of the first to ninth items.

[0086] According to the crushing system 11 relating to the tenth item, it is possible to perform an operation that achieves both stability of the crushing load and an optimal production balance.

[0087] The control method of the crushing system 11 according to the eleventh aspect of the present disclosure is a method for controlling the crushing system 11 including the crusher 100 and the feeder 109 for feeding the material to be crushed to the crusher 100 by the computing units 400 and 500, Obtaining surface shape measurement data representing the surface shape of the crushed product 10 of the crusher 100; A particle size ratio Ract is calculated from the surface shape measurement data, which is a ratio of the production amount Sact of a predetermined target particle size division of the crushed product 10 to a predetermined reference production amount Sall. A load index Lact that directly or indirectly represents the crushing load applied to the crusher 100 is obtained; generating a load index target value Lr that reduces a granularity ratio deviation ΔR obtained by subtracting the granularity ratio Ract from a predetermined granularity ratio target value Rr based on the correlation between a given load index and a granularity ratio and the load index Lact; A control command value MV for controlling at least one of the crusher 100 and the feeder 109 is generated from the load index Lact and the load index target value Lr so that the load index Lact falls within a reference range based on the load index target value Lr.

[0088] In the control method according to the eleventh item, the load index target value Lr is calculated using the particle size ratio Ract, which expresses the production amount of the crushed product 10 of the target particle size division as a ratio to a predetermined reference production amount, and the correlation between the load index and the particle size ratio. In other words, the production amount of the crushed product 10 is adjusted according to the tendency of the production amount of the crushed product 10 of the target particle size division. Since the particle size ratio Ract directly expresses the amount of production of the crushed product 10 of the target particle size division, the amount of production of the crushed product 10 of the target particle size division can be intuitively grasped.

[0089] Furthermore, in the above control method, at least one of the crusher 100 and the feeder 109 is controlled so that the load index Lact falls within a reference range based on the load index target value Lr. This makes it possible to suppress load fluctuations over a short period of time and operate the crushing system 11 stably. Therefore, by generating a load index target value Lr such that the particle size ratio Ract obtained based on the current production volume of the crushed product 10 of the target particle size classification becomes the particle size ratio target value Rr, it is possible to operate the crushing system 11 while achieving both stability and an optimal production balance.

[0090] The particle size characteristic calculation device 4 according to the twelfth aspect of the present disclosure is A calculator 400 for calculating the particle size characteristics of the crushed product 10 is provided. The calculator 400 Obtaining surface shape measurement data representing the surface shape of the crushed product 10; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product 10 is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; The method is configured to determine a count based on a mass of particles sorted into at least one of a plurality of size classes.

[0091] According to the configuration related to the 12th item, the frequency of a specified particle size division directly represents the production volume of crushed product 10 of the specified particle size division, so that the production volume of crushed product 10 of the specified particle size division can be intuitively grasped.

[0092] The particle size characteristic calculation method according to the thirteenth item of the present disclosure is a method for calculating particle size characteristics of the crushed product 10 by a calculator 400, Obtaining surface shape measurement data representing the surface shape of the crushed product 10; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product 10 is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; The count is based on the mass of particles classified into at least one of a number of size classes.

[0093] According to the method relating to the 13th item, the frequency of a specified particle size division directly represents the production volume of the crushed product 10 of the specified particle size division, so that the production volume of the crushed product 10 of the specified particle size division can be intuitively grasped.

[0094] The functions of the calculator 400 of the granularity characteristic calculation device 4 and the calculator 500 of the control device 150 disclosed herein can be performed using circuits or processing circuits, including general-purpose processors, dedicated processors, integrated circuits, ASICs (Application Specific Integrated Circuits), conventional circuits, and / or combinations thereof, configured or programmed to perform the disclosed functions. A processor is considered a processing circuit or circuit because it includes transistors and other circuits. In this disclosure, a circuit, unit, or means is hardware that performs the recited functions. The hardware may be hardware disclosed herein or other known hardware that is programmed or configured to perform the recited functions. When the hardware is a processor, which is considered a type of circuit, the circuit, means, or unit is a combination of hardware and software, and the software is used to configure the hardware and / or the processor.

[0095] The above discussion of the present disclosure has been presented for purposes of illustration and description, and is not intended to limit the present disclosure to the form disclosed herein. For example, in the above detailed description, various features of the present disclosure are grouped together in one embodiment for the purpose of streamlining the present disclosure, but some of the features may be combined. In addition, the features included in the present disclosure may be combined into alternative embodiments, configurations, or aspects other than those discussed above. [Explanation of symbols]

[0096] 1: Particle size characteristics measurement system 2: Transport conveyor 3:Surface shape measuring device 4: Particle size characteristic calculation device 10: Crushed product 11: Crushing system 100: Crusher 109: Supply conveyor (supply machine) 150: Control device 400,500: Arithmetic unit

Claims

1. A control device for a crushing system including a crusher and a feeder for feeding objects to be crushed to the crusher, the control device including a calculator, The computing unit includes: Obtaining surface shape measurement data representing a surface shape of the crushed product of the crusher; Calculating a particle size ratio, which is a ratio of a production amount of a predetermined target particle size range of the crushed product to a predetermined reference production amount, from the surface shape measurement data; Obtaining a load index that directly or indirectly represents a crushing load applied to the crusher; generating a load index target value that reduces a granularity ratio deviation obtained by subtracting the granularity ratio from a predetermined granularity ratio target value based on the correlation between the given load index and the granularity ratio and the load index; a control command value for controlling at least one of the crusher and the feeder based on the load index and the load index target value so that the load index falls within a reference range based on the load index target value is generated. Crushing system control device.

2. The computing unit includes: A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; determining a frequency of the target particle size fraction of the crushed product based on the size index; and calculating the grain size ratio from the frequency of the target grain size range. The control device for a crushing system according to claim 1.

3. A memory device is provided that stores the range of the size index corresponding to the target grain size range, The calculator is configured to classify the particles having the size index within a range of the size index corresponding to the target size class into the target size class, and to calculate the frequency from the mass of the particles classified into the target size class. A control device for a crushing system according to claim 2.

4. The target particle size range is a particle size range of a predetermined product standard of the crushed product; The control device for a crushing system according to claim 1.

5. The target particle size fraction is a particle size fraction outside a predetermined product standard of the crushed product; The control device for a crushing system according to claim 1.

6. The computing unit includes: A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; a plurality of particle size ranges are provided, the particle size ranges being divided at equal intervals, and the plurality of particles are classified into the plurality of particle size ranges including the target particle size range based on the size index; The particle size ratio is calculated from the frequency of the target particle size range. The control device for a crushing system according to claim 1.

7. The crushing system includes a transport conveyor that transports the crushed product, and a surface shape measuring device that measures a surface shape of the crushed product transported by the transport conveyor, The computing unit is configured to acquire the surface shape measurement data generated by the surface shape measuring device. The control device for a crushing system according to claim 1.

8. the computing unit is configured to set a control gain based on the load index and the correlation, obtain a load deviation from the granularity ratio deviation using the control gain, and generate the load index target value based on the load deviation. The control device for a crushing system according to claim 1.

9. the computing unit includes a control gain multiplier that multiplies the granularity ratio deviation by the control gain, and a limiter that limits an output of the control gain multiplier to a predetermined limited range; the limit range is set according to the acquired load index. The control device for a crushing system according to claim 8.

10. A crusher, A feeder that feeds materials to be crushed to the crusher; The control device according to any one of claims 1 to 9, Crushing system.

11. A method for controlling a crushing system including a crusher and a feeder for feeding materials to the crusher, the method comprising the steps of: Obtaining surface shape measurement data representing a surface shape of the crushed product of the crusher; Calculating a particle size ratio, which is a ratio of a production amount of a predetermined target particle size range of the crushed product to a predetermined reference production amount, from the surface shape measurement data; Obtaining a load index that directly or indirectly represents a crushing load applied to the crusher; generating a load index target value that reduces a granularity ratio deviation obtained by subtracting the granularity ratio from a predetermined granularity ratio target value based on the correlation between the given load index and the granularity ratio and the load index; generating a control command value for controlling at least one of the crusher and the feeder based on the load index and the load index target value such that the load index falls within a reference range based on the load index target value; Methods for controlling the crushing system.

12. Equipped with a calculator for calculating the particle size characteristics of the crushed product; The computing unit: Obtaining surface shape measurement data representing a surface shape of the crushed product; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; and determining a count based on a mass of particles classified into at least one of the plurality of size classes. Particle size characteristic calculation device.

13. A method for determining particle size characteristics of a crushed product using a calculator, comprising: Obtaining surface shape measurement data representing a surface shape of the crushed product; A size index representing a particle size of a plurality of particles appearing on the surface of the crushed product is obtained from the surface shape measurement data by image processing; classifying the plurality of particles into a plurality of predetermined size classes based on the size indices; determining a count based on the mass of particles classified into at least one of the plurality of size classes; Particle size characteristic calculation method.

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