Material conveying device with detection function and detection method thereof

Abstract

The invention relates to the technical field of material production instruments, in particular to a material conveying device with a detection function and a detection method thereof.The material conveying device comprises a material conveying line, an online sampling mechanism, a metering hopper, a screening mechanism, a detection module and a sample conveying mechanism; part of materials sampled on the material conveying line serve as inspection samples, the inspection samples pass through the screening mechanism, samples needing to be detected are screened to the metering hopper, the metering hopper discharges the samples to the sample conveying mechanism, sample data are detected through the detection module, the weight of the metering hopper is measured, and individual volume particle data of the samples are detected through the detection module. And the mass of the particle material is fed back according to the specific value of the individual volume number data distribution sample data. According to the invention, the material can be automatically sampled, separated, filtered and detected, so that the quality index of the proportion of particles with unqualified volumes in the material can be quickly and accurately obtained, and the quality of the particle material can be conveniently monitored and controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of material production equipment, and in particular to a material conveying device with a detection function and a detection method thereof. Background Art

[0002] During the production, processing and transportation of granular materials, effective monitoring of the particle size distribution of the materials is a key link to ensure product quality and process stability. Among them, particles that are too large often affect the final effect, performance, and appearance of the product, and may even cause damage to subsequent processing equipment. Therefore, it is crucial to accurately and efficiently detect and control the content of particles that are too large in the material. At present, the detection methods for particles that are too large in granular materials mainly include manual sampling detection and online detection.

[0003] Manual sampling is the most traditional method. This method usually involves manually taking a small amount of samples from the material conveying line at regular intervals, then screening by manual visual inspection or using a standard sieve, weighing the weight of the material on the sieve, and calculating its proportion of the total sample. Although this method is simple and easy to implement, it has many inherent defects. Manual sampling is random, and it is difficult to ensure that each sample can truly reflect the particle size distribution of the entire batch of materials, especially when the material fluidity is uneven, the error is greater, and the sampling representativeness is insufficient. Manual screening and weighing are time-consuming and labor-intensive, and it is difficult to meet the real-time monitoring needs of continuous production processes. It is impossible to detect and correct abnormalities in the production process in a timely manner, and the detection efficiency is low. Manual visual inspection and screening results are easily affected by the subjective judgment and proficiency of the operator, resulting in deviations in the test results, lack of objectivity and consistency, and large human errors. Long-term repetitive sampling and screening work increases the labor intensity of workers, and the labor intensity is high.

[0004] With the development of automation technology, some online detection technologies have been applied to the quality monitoring of particulate materials. For example, the particle size analysis system based on image processing can capture the material image through the camera, and then use the image processing algorithm to analyze the size distribution of the particles. However, these systems still have certain limitations in detecting particles that are too large. In the case of high particle concentration, it is difficult for the image processing system to accurately segment and identify overlapping particles, which may lead to inaccurate counting or size measurement of particles that are too large, and it is difficult to accurately identify overlapping particles. The quality of image acquisition is greatly affected by lighting conditions. Unstable lighting environment may lead to deviations in image analysis results and is sensitive to lighting conditions. High-precision image processing systems are usually expensive and require complex image processing algorithms and hardware support. Maintenance and operation are relatively complex, with high costs and complex systems. Image-based systems mainly obtain particle size information, and it is difficult to directly obtain the weight percentage of particles that are too large. The weight percentage is often an important indicator for evaluating material quality, and it is difficult to directly obtain weight information. In addition, some online detection equipment based on the weighing principle can infer the flow rate or density of materials by measuring the weight change of materials in a specific area on the conveyor line, but these devices are usually difficult to directly distinguish particles of different sizes and cannot selectively detect and quantify particles that are too large. Summary of the invention

[0005] In order to solve the technical problems of the above-mentioned prior art, the present invention provides a material conveying device with detection function and a detection method thereof, which can automatically sample, separate, filter and detect materials, so as to quickly and accurately obtain the quality indicator of the volume proportion of unqualified particles in the material, so as to facilitate the monitoring and control of the quality of the particulate material.

[0006] The present invention provides a material conveying device with a detection function, comprising:

[0007] Material conveying line, used to convey granular materials;

[0008] An online sampling mechanism is arranged above the material conveying line;

[0009] A metering hopper for loading test samples of granular materials;

[0010] A screening mechanism is arranged in the metering hopper, and the screening mechanism is used to filter out particles with excessive volume in the test sample;

[0011] A detection module, used for detecting data of test samples;

[0012] A sample conveying mechanism, used for receiving and conveying the qualified volume particle sample dropped from the metering hopper and screened out by the screening mechanism;

[0013] Among them, the online sampling mechanism collects a part of the granular material on the material conveying line as an inspection sample and transports the inspection sample to the metering hopper. The detection module detects the initial inspection sample data entering the metering hopper, as well as the data of particles with excessive volume in the inspection sample that are filtered by the screening mechanism and retained in the metering hopper, and feeds back the quality of the material based on the ratio of the data of particles with excessive volume to the data of the initial inspection sample.

[0014] According to a material conveying device with a detection function of the present invention, the detection module comprises:

[0015] A weighing module, supporting the bottom of the metering hopper upwards;

[0016] The weighing module measures the total weight of the test sample entering the metering hopper, and measures the weight of the particles with excessive volume that are filtered by the screening mechanism and retained in the metering hopper.

[0017] The system provides feedback on the quality of the material based on the ratio of the weight data of the oversized particles to the weight data of the initial inspection sample.

[0018] According to a material conveying device with a detection function of the present invention, the detection module comprises:

[0019] A first visual module is used to detect the volume qualified particles in the test sample that pass through the screening mechanism; the first visual module detects image data of the volume qualified particles in the test sample;

[0020] The system calculates the weight data of the particles with qualified volume according to the difference between the total weight of the inspection sample and the weight of the particles with excessive volume;

[0021] The system calculates the total volume of the qualified volume particles according to the size values ​​of the qualified volume particles and the image data of the first visual module;

[0022] The system calculates the density ρ of the qualified volume particles based on the weight data of the qualified volume particles and the total volume data;

[0023] The system feeds back the quality of the material based on the density ρ of the qualified volume particles.

[0024] According to a material conveying device with a detection function of the present invention, the detection module comprises:

[0025] A second visual module is disposed above the metering hopper and is used to collect image data of the inspection sample in the metering hopper;

[0026] The system calculates the number of particles with excessive volume through the image data of the second visual module, and calculates the number of particles with qualified volume through the image data of the first visual module;

[0027] The system feeds back the quality of the material based on the ratio between the number of particles with acceptable volume and the number of particles with excessive volume.

[0028] According to a material conveying device with a detection function of the present invention, the sample conveying mechanism includes a first inclined discharge channel, a return conveyor belt and a second inclined discharge channel;

[0029] The return conveyor belt is located below the first visual module and between the first inclined unloading channel and the second inclined unloading channel;

[0030] One end of the first inclined discharge channel extends obliquely upward to the bottom discharge port of the metering hopper, and the other end extends obliquely downward to the top of the return conveyor belt;

[0031] One end of the second inclined unloading channel extends obliquely upward to below the return material conveyor belt, and the other end extends obliquely downward to above the material conveying line.

[0032] According to a material conveying device with a detection function of the present invention, the first inclined discharge channel is provided with a discharge port at one end close to the return material conveyor belt, and a limited material baffle is rotatably provided at the discharge port;

[0033] The discharge port is closed by the material limiting baffle, so that the qualified volume particles in the test sample that pass the filter screen fall into the first inclined discharge channel and are restricted in the first inclined discharge channel by the material limiting baffle;

[0034] The weighing module is supported upwardly by the first inclined discharge channel and the metering hopper together, so as to obtain the total weight data of the inspection sample by measuring the oversized particles retained in the metering hopper and the qualified particles retained in the first inclined discharge channel together;

[0035] By controlling the limiting baffle to deflect at a certain angle, a discharge gap is formed between the lower edge of the limiting baffle and the discharge port; the opening size of the discharge gap is suitable for matching the diameter of the qualified volume particles to allow the qualified volume particles to leave the first inclined discharge channel.

[0036] According to a material conveying device with a detection function of the present invention, the material limit baffle is arranged to be liftable, and the system adjusts the opening of the discharge slot by the deflection angle of the material limit baffle so that the height size of the discharge slot is suitable for matching the volume qualified particles of different diameters.

[0037] According to the material conveying device with a detection function of the present invention, a cleaning scraper and a cleaning sponge arranged laterally are provided below the return material conveyor belt, and the cleaning scraper and the cleaning sponge scrape the surface of the return material conveyor belt upwards in sequence.

[0038] According to a material conveying device with a detection function of the present invention, the online sampling mechanism comprises:

[0039] A vertical guide rail, arranged above the material conveying line;

[0040] A lifting slider is slidably arranged on the vertical guide rail;

[0041] A transverse guide rail, perpendicular to the vertical guide rail;

[0042] A translation slider is slidably disposed on the transverse guide rail and connected to the vertical guide rail, and the translation slider drives the vertical guide rail and the lifting slider to move laterally along the transverse guide rail;

[0043] Wherein, a material taking shovel is rotatably provided at the bottom of the lifting slide block;

[0044] The system controls the material taking shovel to rotate upwards by a certain angle to scoop up the granular material on the material conveying line, and controls the material taking shovel to rotate downwards by a certain angle to pour the granular material into the top opening of the metering hopper.

[0045] The present invention provides a detection method for a material conveying device with a detection function, comprising:

[0046] Collecting test samples step: collecting a certain amount of granular material from the material conveying line as a test sample, and placing the test sample in the measuring hopper;

[0047] Weighing and recording total weight step: using the weighing module to measure the total weight A of the inspection sample, and sending A to the control system;

[0048] Oversized particle sample separation step: Oversized particles in the test sample are blocked by the screening mechanism and retained on the screening mechanism, while qualified particles pass through the screening mechanism and fall into the conveying channel;

[0049] Weighing and recording the weight of the over-volume and over-large particle sample: using the weighing module again to measure the weight A1 of the over-volume and over-large particle sample retained on the screening mechanism, and sending A1 to the control system;

[0050] Step of calculating and drawing curve graph X: the control system calculates the ratio of A1 to A R=A1 / A according to A and A1, obtains multiple groups of ratios R after repeated detection, and draws curve graph X according to R of each detection to reflect the weight proportion of particles with excessive volume in the batch of materials.

[0051] A detection method for a material conveying device with a detection function according to the present invention is characterized by comprising:

[0052] Calculating the weight of qualified volume particles: The control system calculates the weight of qualified volume particle samples A2=A-A1 according to the total weight A of the inspection sample and the weight A1 of the over-volume and over-large particle samples;

[0053] The step of obtaining the size value of the qualified volume particles is as follows: obtaining the diameter size value D of the qualified volume particles, wherein the size value D is a preset value or is determined by image analysis of the first visual module;

[0054] The step of measuring the total volume of qualified volume particles: using the image data obtained by the first visual module, the volume of the qualified volume particle samples that pass the screening mechanism and are laid on the return conveyor belt is measured to obtain the total volume V of the qualified volume particle samples;

[0055] Calculating density ρ step: the system calculates the density ρ of the qualified volume particles according to A2 and the total volume V = A2 / V;

[0056] Steps for drawing graph Z: After repeated testing, multiple groups of density ρ are obtained, and graph Z is drawn based on the ρ of each test to reflect the overall quality of the batch of materials.

[0057] A detection method for a material conveying device with a detection function according to the present invention comprises:

[0058] The step of detecting the number of particles with too large a volume: collecting image data of the particles with too large a volume by a second visual module arranged above the metering hopper, and analyzing the image by a control system to obtain the number B2 of the particles with too large a volume;

[0059] The step of detecting the number of particles of the qualified volume particle sample is as follows: the image data of the qualified volume particle sample is collected by a first visual module arranged above the return material conveyor belt, and the control system analyzes the image to obtain the number of particles B1 of the qualified volume particle sample;

[0060] Ratio calculation step: the control system calculates the ratio of B1 to B Q = B1 / B2 according to B1 and B2, and obtains multiple groups of ratios Q after repeated detection;

[0061] Steps for drawing the curve Y: Draw the curve Y according to the Q of each test to reflect the quantity ratio between the qualified volume particles and the oversized volume particles of the batch of materials.

[0062] When a material conveying device with a detection function of the present invention is in operation, the material conveying line carries and conveys granular materials forward. During the working process of the entire device, the granular materials first move on the material conveying line to provide an accessible material source for subsequent sampling. The online sampling mechanism is arranged above the material conveying line. Under the drive of the control system or the corresponding driving mechanism, the online sampling mechanism can obtain part of the granular materials from the material conveying line. A "sampling-conveying" relationship is formed between the online sampling mechanism and the material conveying line. The samples obtained by the online sampling mechanism are the "detection materials" that subsequently enter the metering hopper. The online sampling mechanism transports the acquired sample to the metering hopper; the metering hopper can cooperate with the detection module and the screening mechanism to complete the detection and particle separation. Since the screening mechanism is arranged in the metering hopper, when the test sample falls into the metering hopper, the particles with too large volume or particle size are blocked or retained by the screening mechanism; and the particles with qualified volume size can pass through the screening mechanism and fall to the lower layer or be further processed. The screening mechanism and the metering hopper are installed in an integrated relationship. The existence of the screening mechanism enables the test sample to complete the "size screening" operation here, thereby realizing the distinction and detection of different particle volumes. The detection module can collect data on the material in the metering hopper (including the initial sample stage and the post-filtration stage), for example, it can realize the detection functions of total weight, particle number or other images / sizes, the detection module reads or counts the data of the two stages of "initial test sample data" and "volume too large particle data", and then the system performs ratio calculation to finally realize the determination of the quality of the particle material. The detection module can include a weighing unit, a visual unit or other components that can perform data collection, and the specific form can be changed according to the implementation requirements. During operation, the granular material is conveyed forward through the material conveyor line. When testing is required, the online sampling mechanism performs sampling operation, collects part of the granular material from the material conveyor line and puts it into the metering hopper. At this time, the material put in is the "initial inspection sample". Then, the detection module will obtain data (such as weight, quantity, size, etc.) of the "initial inspection sample". Then, the screening mechanism will screen the inspection sample according to the particle size. Those particles with too large volume are retained on the screening mechanism or the upper area of ​​the screening mechanism; these particles are then detected or weighed / counted by the detection module again to obtain "oversized particle data". Finally, the detection module performs a ratio operation on the "oversized particle data" and the "initial inspection sample data", and then the quality status of the granular material can be output (for example, whether there is a high proportion of oversized particles, whether the production process needs to be adjusted, etc.), and the test results are fed back to the subsequent system or personnel.It can be understood that in the technical solution of the present invention, since an online sampling mechanism is arranged above the conveyor belt, representative inspection samples can be extracted without affecting mass production and transportation, thereby improving the sampling efficiency. After the inspection sample is put into the metering hopper, the detection module first collects the "initial inspection sample data" to obtain the initial quality characteristics of the sampled material. The setting of the screening mechanism allows particles with excessive volume to be naturally filtered and retained, and the "excessively large particle data" is measured again by the detection module. The ratio of the "excessively large particle data" to the "initial inspection sample data" can be calculated intuitively to provide feedback on the proportion of large particles in the granular material, and to give an intuitive judgment on the quality of the granular material. The entire process is completed in an automated manner, thereby achieving accurate, rapid and real-time quality monitoring of the granular material and reducing errors or delays caused by manual intervention. The technical solution of the present invention organically combines material transportation, sampling, screening and detection, which not only simplifies the operation process, but also can obtain graded detection data, and finally achieve the effect of rapid screening and evaluation of the quality of particulate materials. Therefore, it is possible to automatically sample, separate, filter and detect materials, thereby quickly and accurately obtaining the quality indicator of the volume ratio of unqualified particles in the material, so as to realize the monitoring and control of the quality of the particulate materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 is a stereogram of the present invention;

[0065] Figure 2 It is a simplified schematic diagram of the structure of the present invention.

[0066] Reference numerals:

[0067] 100. Material conveying line;

[0068] 200, online sampling mechanism, 201, vertical guide rail, 202, lifting slider, 203, transverse guide rail, 204, translation slider, 205, material shovel;

[0069] 300. Measuring hopper;

[0070] 400. Screening Agency;

[0071] 500, weighing module, 501, first visual module, 502, second visual module;

[0072] 600, first inclined discharge channel, 601, discharge port, 602, material limiting baffle, 603, discharge slot;

[0073] 700, return material conveyor belt, 701, cleaning scraper, 702, cleaning sponge;

[0074] 800. Second inclined unloading channel. DETAILED DESCRIPTION

[0075] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0076] like Figure 1 and Figure 2As shown, a material conveying device with a detection function in this embodiment mainly includes a material conveying line 100, an online sampling mechanism 200, a metering hopper 300, a filter screen screening mechanism 400, a detection module, a conveying sample mechanism and a control system, wherein the screening mechanism 400 in this embodiment is set as a filter screen. The material conveying line 100 is used to convey granular materials, the online sampling mechanism 200 is installed above the material conveying line 100, the metering hopper 300 is used to load the inspection sample of the granular material, the screening mechanism 400 is fixed in the metering hopper 300, the screening mechanism 400 is used to filter the oversized particles in the inspection sample, and the inspection sample data in the metering hopper 300 is detected by the detection module. The conveying sample mechanism is used to receive and transmit the qualified volume particle sample that falls from the metering hopper 300 and is screened by the screening mechanism 400. During operation, the online sampling mechanism 200 collects a portion of the granular material on the material conveying line 100 as an inspection sample, and transports the inspection sample to the metering hopper 300. The detection module detects the initial inspection sample data entering the metering hopper 300, as well as the data of particles with excessive volume in the inspection sample that are filtered by the screening mechanism 400 and retained in the metering hopper 300, and feeds back the quality of the material based on the ratio of the data of particles with excessive volume to the data of the initial inspection sample.

[0077] It can be understood that when the material conveying device of this embodiment is in operation, the material conveying line 100 carries and conveys the granular material forward. During the operation of the entire device, the granular material first moves on the material conveying line 100 to provide an accessible material source for subsequent sampling. The online sampling mechanism 200 is arranged above the material conveying line 100. Driven by the control system or the corresponding driving mechanism, the online sampling mechanism 200 can obtain part of the granular material from the material conveying line 100. A "sampling-conveying" relationship is formed between the online sampling mechanism 200 and the material conveying line 100. The sample obtained by the online sampling mechanism 200 is the "inspection sample" that subsequently enters the metering hopper 300. The line sampling mechanism 200 transports the acquired sample to the metering hopper 300; the metering hopper 300 can cooperate with the detection module and the screening mechanism 400 to complete the detection and particle separation. Since the screening mechanism 400 is arranged in the metering hopper 300, when the test sample falls into the metering hopper 300, the particles with too large volume or particle size are blocked or retained by the screening mechanism 400; and the particles with qualified volume size can pass through the screening mechanism 400 and fall to the lower layer or be further processed. The screening mechanism 400 and the metering hopper 300 are installed in an integrated relationship. The existence of the screening mechanism 400 enables the test sample to complete the "size screening" operation here, thereby realizing the distinction and detection of different particle volumes. The detection module can collect data on the material in the metering hopper 300 (including the initial sample stage and the post-filtration stage). For example, it can realize the detection functions of total weight, number of particles or other images / sizes. The detection module reads or counts the data of the two stages of "initial inspection sample data" and "oversized particle data". The system will then calculate the ratio and finally determine the quality of the granular material. The detection module may include a weighing unit, a visual unit or other components that can perform data collection. The specific form can be changed according to the implementation requirements. During operation, the granular material is transported forward through the material conveying line 100. When detection is required, the online sampling mechanism 200 performs a sampling operation, collects part of the granular material from the material conveying line 100 and puts it into the metering hopper 300. At this time, the material put in is the "initial inspection sample". Then, the detection module will obtain data (such as weight, quantity, size, etc.) of the "initial inspection sample". Then, the screening mechanism 400 will screen the inspection sample according to the particle size. Those particles that are too large are retained on the filter screen or the upper area of ​​the filter screen; these particles are then detected or weighed / counted again by the detection module to obtain "data of particles that are too large in volume". Finally, the detection module will perform a ratio operation on the "data of particles that are too large in volume" and the "initial inspection sample data" to output the quality status of the particle material (for example, determine whether there is a high proportion of oversized particles, whether the production process needs to be adjusted, etc.), and feed back the detection results to subsequent systems or personnel.It can be understood that in the technical solution of the present invention, since an online sampling mechanism 200 is provided above the conveyor belt, representative inspection samples can be extracted without affecting mass production and transportation, thereby improving sampling efficiency. After the inspection sample is put into the metering hopper 300, the detection module first collects "initial inspection sample data" to obtain the initial quality characteristics of the sampled material. The setting of the screening mechanism 400 allows particles with excessive volume to be naturally filtered and retained, and the "excessively large particle data" is measured again by the detection module. The ratio of the "excessively large particle data" to the "initial inspection sample data" can be calculated intuitively to provide feedback on the proportion of large particles in the granular material, and to give an intuitive judgment on the quality of the granular material. The entire process is completed in an automated manner, thereby achieving accurate, rapid and real-time quality monitoring of the granular material and reducing errors or delays caused by manual intervention. The technical solution of the present invention organically combines material transportation, sampling, screening and detection, which not only simplifies the operation process, but also can obtain graded detection data, and finally achieve the effect of rapid screening and evaluation of the quality of particulate materials. Therefore, it is possible to automatically sample, separate, filter and detect materials, thereby quickly and accurately obtaining the quality indicator of the volume ratio of unqualified particles in the material, so as to realize the monitoring and control of the quality of the particulate materials.

[0078] In one embodiment, the detection module includes a weighing module 500, which supports the bottom of the metering hopper 300 upwards. The weighing module 500 measures the total weight data of the test sample entering the metering hopper 300, and measures the weight data of the oversized particles filtered by the screening mechanism 400 and retained in the metering hopper 300. The system feeds back the quality of the material according to the ratio of the weight data of the oversized particles to the weight data of the initial test sample. It can be understood that the weighing module 500 is installed at the bottom of the metering hopper 300, and can perform real-time weighing and measurement of the metering hopper 300 by supporting it. The screening mechanism 400 is located inside the metering hopper 300, and is used to perform volume classification after the sample falls into the metering hopper 300; at this time, the weighing module 500 can obtain the weight data before and after filtering respectively. The system obtains the weight of the initial test sample and the weight of the oversized particles from the weighing module 500 through signal connection, which is used for subsequent ratio calculation. When the online sampling mechanism 200 sends the granular material into the metering hopper 300, the weighing module 500 first measures the total weight data of the "initial inspection sample", and the screening mechanism 400 retains the oversized particles on the cylinder or the screen. At this time, the weighing module 500 measures the weight of the "oversized particles" when they stay inside the metering hopper 300. Based on these two weight measurements, the system obtains the ratio of the weight of the oversized particles to the total weight of the initial inspection sample to reflect the proportion of large particles in the material. By configuring the weighing module 500 at the bottom of the metering hopper 300, the overall weight of the sample and the weight of the large particles can be accurately measured, and the two can be compared to provide a quantitative basis for further judging the quality of the material and the proportion of large particles. This solution helps to realize automatic detection and timely feedback of material quality, and improve detection efficiency and accuracy. In summary, the above structure uses the weighing module to perform weight detection on the inspection sample, obtain the mass ratio between the initial sample and the oversized particles, and thus provide a weight ratio parameter for material quality evaluation.

[0079] In one embodiment, the detection module further includes a first visual module 501, which is used to detect the volume qualified particles in the test sample that pass through the screening mechanism 400, thereby detecting the image data of the volume qualified particles in the test sample, and the control system calculates the weight data of the volume qualified particles according to the difference between the total weight of the test sample and the weight of the particles with excessive volume, and calculates the total volume of the volume qualified particles according to the size value of the volume qualified particles and the image data of the first visual module 501, and then the system calculates the density ρ of the volume qualified particles according to the weight data of the volume qualified particles and the total volume data, and finally feeds back the quality of the material according to the density ρ of the volume qualified particles. It can be understood that the first visual module 501 collects the image data of the volume qualified particles that fall on the return material conveyor belt 700 after passing through the screening mechanism 400 to achieve continuous shooting, while the weighing module 500 focuses on measuring quality, and the first visual module 501 focuses on image acquisition and volume estimation, which complement each other and provide necessary parameters for the system to calculate the density of qualified particles. The control system analyzes the image of the first visual module 501 through the existing image recognition technology, identifies the number of particles, particle shape or projection area, and thus estimates the total volume of particles. When the qualified volume particles pass through the screening mechanism 400, the first visual module 501 collects images of the appearance of these particles. The system calculates the density ρ of the particles based on the qualified particle weight given by the weighing module 500 and the total volume of qualified particles given by the first visual module 501. For materials of different batches or different time periods, the system can continuously collect data of this density ρ, thereby dynamically reflecting the fluctuation and trend of material quality. It can be understood that on the basis of the same weight and the same volume, the density can more intuitively reflect the internal quality characteristics of the granular material. By performing volume detection through the first visual module 501 and combining it with the quality detection of the weighing module 500, not only can the proportion of large particles be quantitatively analyzed, but also the density of qualified particles can be deeply evaluated, significantly improving the detection dimension and reliability. In summary, the above structure obtains accurate data on the volume and weight of qualified particles through the joint detection of the visual module and the weighing module, thereby deriving and mastering the particle density, providing a more comprehensive indicator basis for material quality.

[0080] In one embodiment, the detection module further includes a second visual module 502, which is installed above the metering hopper 300. The control system collects image data of the inspection sample in the metering hopper 300 through the second visual module 502. The control system calculates the total number of particles in the inspection sample through the image data of the second visual module 502, and calculates the number of particles of qualified volume particles through the image data of the first visual module 501. Finally, the quality of the material is fed back according to the ratio between the number of particles of qualified volume particles and the number of particles of the initial inspection sample. It can be understood that in this embodiment, the second visual module 502 is installed above the metering hopper 300, and the image of the initial inspection sample falling into the cylinder can be directly photographed to obtain the total number of particles in the inspection sample. The first visual module 501 focuses on the qualified particles passing through the filter screen, and the second visual module 502 focuses on the entire inspection sample in the metering hopper 300. The two can form a "total number - qualified number" quantity comparison. The system uses the image data of the second visual module 502 to identify and count the entire batch of particles, and then uses the image data of the first visual module 501 to identify and count the qualified volume particles. The combination of the two can reflect the qualified rate or unqualified rate. That is to say, after the inspection sample is fed into the metering hopper 300, the second visual module 502 takes an image of the inspection sample, and the system identifies and counts the number of particles in the entire sample (i.e., the total number of particles). Next, the inspection sample will be separated into large particles and qualified particles by the filter screen, and the qualified particles will be photographed and counted by the first visual module 501 to obtain the number of qualified particles. The system compares the ratio between the "number of qualified particles" and the "total number of particles" to generate a quality assessment reference value. This solution can quickly obtain the overall number of particles and the number of qualified particles, thereby obtaining statistical indicators such as the qualified rate or the unqualified rate. In conjunction with the density and weight detection described in claim 3, the particle number distribution and morphological characteristics of the material can be further comprehensively grasped, greatly improving the credibility and comprehensiveness of the test results. In summary, this solution aims to expand the dimension of visual detection. In addition to weighing, the total number of particles of the initial inspection sample is obtained through the second visual module 502, and the data information of qualified particles is obtained under the first visual module 501, so as to achieve quality judgment based on the distribution of particle numbers.

[0081] Furthermore, the structure of this embodiment also includes a first inclined discharge channel 600, a return conveyor belt 700 and a second inclined discharge channel 800. The return conveyor belt 700 is located below the first visual module 501 and between the first inclined discharge channel 600 and the second inclined discharge channel 800. The right end of the first inclined discharge channel 600 extends obliquely upward to the bottom discharge port of the metering hopper 300, the left end of the first inclined discharge channel 600 extends obliquely downward to the top of the return conveyor belt 700, the right end of the second inclined discharge channel 800 extends obliquely upward to the bottom of the return conveyor belt 700, and the left end of the second inclined discharge channel 800 extends obliquely downward to the top of the material conveying line 100. In the above structure, the first inclined discharge channel 600 and the bottom discharge port of the metering hopper 300 are used to receive the volume qualified particles that fall after passing through the filter screen. The channel is designed to be inclined so as to use gravity to guide the qualified particles to the return conveyor belt 700. The return conveyor belt 700 is arranged below the first visual module 501, so that when the qualified particles are flatly moved on the return conveyor belt 700, they can be photographed by the first visual module 501, so as to perform image detection such as the number or size of particles. The left end of the return conveyor belt 700 is connected to the second inclined discharge channel 800, which re-transports the qualified particles that have been detected back to the material conveying line 100 to realize the reflux cycle. Specifically, during the detection process, the qualified particles fall onto the return conveyor belt 700 through the first inclined discharge channel 600 to form a flat state. The first visual module 501 takes images of these flat particles above the return conveyor belt 700 to obtain information such as the number or size of particles. The return conveyor belt 700 returns the qualified particles to the material conveying line 100 via the second inclined discharge channel 800 at the conveying end to realize material circulation transportation. Through the cooperation of the first inclined discharge channel 600 and the return conveyor belt 700, it is ensured that the volume qualified particles can pass through the visual inspection position in a stable and photographable manner, and the qualified particles are returned to the material conveying line 100 through the second inclined discharge channel 800, which not only saves material resources, but also makes the overall inspection process closely integrated with the production process, improving production continuity and inspection efficiency. In summary, the purpose of the above structure is to construct a conveying and return path for qualified particles, and effectively integrate the inspection station of the first visual module 501 into the conveying process, so as to realize the on-site online inspection and subsequent recycling and reuse of qualified particles.

[0082] In one embodiment, the first inclined discharge channel 600 is provided with a discharge port 601 at one end close to the return conveyor belt 700, and a limited material baffle 602 is rotatably installed at the discharge port 601. The discharge port 601 is closed by the limited material baffle 602, so that the qualified volume particles in the test sample that pass the filter screen fall into the first inclined discharge channel 600 and are restricted by the limited material baffle 602 and temporarily stored in the first inclined discharge channel 600. The weighing module 500 is supported upward by the first inclined discharge channel 600 and the metering hopper 300 together, so as to obtain the total weight data of the test sample by measuring the oversized volume particles retained in the metering hopper 300 and the qualified volume particles retained in the first inclined discharge channel 600. By controlling the material limiting baffle 602 to deflect by a certain angle, a discharge gap 603 is formed between the lower edge of the material limiting baffle 602 and the discharge port 601, which is equivalent to the control system controlling the material limiting baffle 602 to rotate by a certain angle and then open the discharge port 601, and the qualified volume particles can flow out of the first inclined discharge channel 600 through the discharge gap 603; the opening size of the discharge gap 603 is suitable for matching the diameter of the qualified volume particles to allow the qualified volume particles to leave the first inclined discharge channel 600. It can be understood that the material limiting baffle 602 is connected to the upper side of the discharge port 601 by a hinge or a rotating shaft, so that the material limiting baffle 602 can generate a deflection swing at the discharge port 601, and the opening of the discharge port 601 is controlled by a rotation swing, and the control system can open the discharge port 601 of the first inclined discharge channel 600 by controlling the material limiting baffle 602. During the material detection process, if the limiting baffle 602 is in a closed state, the discharge port 601 is blocked, and the qualified volume particles will accumulate in the first inclined discharge channel 600 and will not fall onto the return conveyor belt 700. When material discharge is required, the deflection angle of the limiting baffle 602 is controlled so that a discharge gap 603 matching the particle diameter appears between its lower edge and the discharge port 601, thereby achieving a single-layer orderly discharge of qualified volume particles, allowing the qualified volume particles to be more easily spread on the surface of the return conveyor belt 700. The weighing module 500 is arranged on the supporting structure below the metering hopper 300 and the first inclined discharge channel 600, and supports the metering hopper 300 and the first inclined discharge channel 600 as a whole through the same metering plane or the same base. When the material limiting baffle 602 closes the discharge port 601, the particles with qualified volume are retained in the first inclined discharge channel 600, and the particles with excessive volume are retained in the metering hopper 300. The total weight of these two parts of material, that is, the total weight data of the inspection sample, can be measured at one time through the weighing module 500. When the discharge gap 603 is opened, so that all the particles with qualified volume leave the first inclined discharge channel 600, the weighing module 500 can measure the weight data of the particles with excessive volume retained in the metering hopper 300 separately.The limiting baffle 602 can be driven by a motor or a cylinder to perform a deflection action. By controlling the limiting baffle 602 to deflect a certain angle to form a discharge gap 603 between the lower edge of the limiting baffle 602 and the discharge port 601, qualified particles can be discharged to the return conveyor belt 700. The discharge gap 603 plays the role of "quantitative screening" or "single-layer passage" when the particles are discharged. When the height of the discharge gap 603 is similar to the particle diameter, it can avoid the stacking of multiple layers of particles and ensure that the particles pass in an orderly manner, which is convenient for the subsequent image detection of the first visual module 501. In the process of performing the detection work, when the qualified volume particles slide toward the discharge port 601 along the first inclined discharge channel 600, the limiting baffle 602 only allows particles that meet the set diameter to pass through the discharge gap 603 in a single row or with a limited thickness. After the particles are discharged, they automatically fall on the return conveyor belt 700, ensuring that the image captured by the first visual module 501 is more accurate and more convenient for subsequent algorithm recognition. This solution enables qualified particles to fall neatly and orderly when discharged, greatly reducing the phenomenon of particle stacking or aggregation on the return conveyor belt 700, improving the recognition accuracy of the visual inspection module, reducing problems such as jamming and piling, improving detection stability, and also improving the overall automation and reliability of the device.

[0083] In one embodiment, preferably, a cleaning scraper 701 and a cleaning sponge 702 arranged in a transverse direction are installed below the return conveyor belt 700, and the cleaning scraper 701 and the cleaning sponge 702 scrape the surface of the return conveyor belt 700 upward in sequence. It can be understood that the cleaning scraper 701 and the cleaning sponge 702 are both installed below the return conveyor belt 700, usually close to the surface of the conveyor belt, so that the conveyor belt can be cleaned in real time when it passes through the running process. During the counterclockwise rotation of the return conveyor belt 700, the cleaning scraper 701 can scrape off larger particles and stubborn debris; the cleaning sponge 702 can further wipe the surface of the conveyor belt to remove fine dust or particles, so as to obtain a cleaner and smoother shooting background. The accuracy of the picture taken by the first visual module 501 is affected by the cleanliness of the conveyor belt surface. If there are attachments, it is easy to interfere with the recognition and measurement of the image algorithm. Therefore, the cleaning mechanism plays an important role in ensuring the detection accuracy. In the process of performing the detection work, when the return conveyor belt 700 is in circulation, the belt surface is initially cleaned by the cleaning scraper 701, and then finely wiped by the cleaning sponge 702. After cleaning, the belt surface of the return conveyor belt 700 maintains a high degree of cleanliness within the shooting range of the first visual module 501, so that the image error obtained by the system is smaller. Therefore, through the successive actions of the cleaning scraper 701 and the cleaning sponge 702, the return conveyor belt 700 can maintain a continuous clean state, greatly reducing the interference of impurities and dirt on particle image recognition, thereby making the system's detection results in weight, volume and particle counting more stable and reliable. In summary, the technical purpose of the above scheme is to ensure the cleanliness and cleanliness of the surface of the return conveyor belt, thereby providing a high-quality background for the image recognition of the first visual module 501, and ultimately improving the accuracy of qualified particle size and quantity detection.

[0084] In one embodiment, the structure of the online sampling mechanism 200 specifically includes a vertical guide rail 201, a lifting slider 202, a transverse guide rail 203, and a translation slider 204. The vertical guide rail 201 is fixed above the material conveying line 100, the lifting slider 202 is slidably installed on the vertical guide rail 201, the transverse guide rail 203 and the vertical guide rail 201 are perpendicular to each other, and the translation slider 204 is slidably installed on the transverse guide rail 203 and fixedly connected to the vertical guide rail 201. The translation slider 204 drives the vertical guide rail 201 and the lifting slider 202 to move laterally along the transverse guide rail 203. In addition, a material shovel 205 is rotatably installed at the bottom of the lifting slider 202. The material shovel 205 is driven to rotate by a motor, and the motor is installed on the lifting slider 202. The control system controls the material shovel 205 to rotate upward by a certain angle to scoop up the granular material on the material conveying line 100, and can also control the material shovel 205 to rotate downward by a certain angle to pour the granular material into the top opening of the metering hopper 300. It can be understood that, under the command of the control system, the translation slider 204 moves along the transverse guide rail 203, thereby driving the vertical guide rail 201 and the lifting slider 202 to approach or move away from a specific sampling point on the material conveying line 100 in the horizontal direction. After reaching the target transverse position, the control system will drive the lifting slider 202 to descend, so that the material shovel 205 approaches or inserts into the granular material layer on the material conveying line 100. When the material shovel 205 reaches the appropriate lower position, the material shovel 205 begins to rotate or flip upward at a certain angle, thereby realizing the "scooping" action of the granular material to form an inspection sample. Then the system controls the lifting slider 202 to move upward, and drives the translation slider 204 to move the material shovel 205 together with the scooped granular material to the top of the metering hopper 300. Just above the top opening of the metering hopper 300, the material shovel 205 flips downward and pours the granular material it contains into the metering hopper 300, completing the sampling and sending the inspection sample to the subsequent detection process. On the one hand, due to the use of a combination structure of a double-rail vertical guide 201 and a transverse guide 203 and a lifting slider, a translation slider, and a material shovel, the sampling process can be controlled in multiple dimensions, achieving automated and accurate material collection. On the other hand, the rotation angle of the material shovel 205 is controllable, which can ensure that the amount of granular materials taken by the spoon is more uniform and stable, and can avoid the uncertainty caused by manual or fixed online sampling mechanisms. On the other hand, this solution provides a structural guarantee for accurately introducing the test sample into the metering hopper 300. The repeatability and accuracy of the sample are improved, providing higher detection reliability and data accuracy for subsequent weight-based, visual and screening links. By accurately pouring the sample into the metering hopper 300, a unified and repeatable sampling condition is provided for a series of subsequent weighing, visual inspection, and filtering and screening operations.

[0085] It should also be pointed out that in actual applications, there are differences in the volumes of qualified particles in different batches or types of granular materials. The opening speed of the limiting baffle 602 to the discharge port 601 needs to be adjusted. If the opening speed of the limiting baffle 602 to the discharge port 601 is too fast, that is, the discharge slit 603 is opened too fast, the granular materials temporarily stored in the first inclined discharge channel 600 are likely to stack up on each other and enter the return conveyor belt 700, that is, it cannot be ensured that the granular materials are laid flat on the surface of the return conveyor belt 700 in a single layer, thereby affecting the first visual module 501 for the qualified particles. Accuracy of particle number recognition: If the opening speed of the material limiting baffle 602 to the discharge port 601 is too slow, that is, when the discharge slit 603 is opened too slowly, some of the slightly larger granular materials will be temporarily blocked and accumulated in the first inclined discharge channel 600, which will cause the arrangement spacing of the granular materials on the return conveyor belt 700 to be uneven, and there will be a large spacing, and the overall arrangement is not tight, and the granular materials are difficult to be spread flat on the surface of the return conveyor belt 700. As a result, it is difficult for the system to calculate the total volume V of the qualified volume particle sample through the image data of the qualified volume particles by the first visual module 501, affecting the accuracy of the detection. In order to solve this problem as much as possible, this embodiment further adds the following technical solutions:

[0086] The control system of the material conveying device is also provided with a data processing unit and a control unit;

[0087] The data processing unit calculates the stacking rate of the granular material on the surface of the return conveyor belt 700 according to the image information collected by the first visual module 501. n and spacing rate G n ;

[0088] The control unit adjusts the opening speed v of the material limiting baffle 602 to the discharge port 601 according to the following mathematical model: n+1 ;

[0089]

[0090] In the formula, v n is the opening speed of the current detection task, v n+1 The opening speed for the next detection work, O ref and G ref are the preset thresholds of stacking rate and spacing rate respectively, and k1 and k2 are control adjustment coefficients.

[0091] It can be understood that in the above scheme, the control system is composed of a data processing unit and a control unit, and uses the image data from the first visual module 501 to realize dynamic adjustment of the opening speed of the material limiting baffle 602 to adapt to different batches and different types of granular materials, and ensure that the arrangement of granular materials on the return conveyor belt 700 meets the detection requirements. During operation, the data processing unit receives the image information collected by the first visual module 501, and calculates the stacking rate of the granular materials on the return conveyor belt through the image processing algorithm. n and spacing rate G n . Stacking rate O n It indicates the degree of stacking of granular materials on the return conveyor belt, which can be calculated by detecting the number of overlapping particles or the overlapping area in the image. n It indicates the average spacing of the granular material on the return conveyor belt. The deviation from the ideal spacing can be obtained by measuring the distance between adjacent particles and calculating the average value.

[0092] The control unit calculates the stacking rate O according to the data processing unit. n and spacing rate G n And the preset threshold O ref and G ref , using the mathematical model set above, calculate the opening speed v of the material limit baffle 602 for the next detection work n+1 , the specific control logic is as follows:

[0093] When O is detected n >O ref When: the system automatically determines that the granular materials on the return conveyor belt 700 are seriously stacked, and the opening speed of the limiting baffle 602 needs to be reduced to reduce the stacking. The control unit calculates the opening speed adjustment amount as:

[0094] v n+1 =v n -k1×(O n -O ref );

[0095] The purpose is to reduce the number of particles falling into the return material conveyor belt per unit time, reduce the probability of stacking, and avoid detection errors caused by particle material stacking through dynamic adjustment.

[0096] When G n >G ref When: the system automatically determines that the spacing between the granular materials on the return conveyor belt 700 is too large, and the opening speed of the limiting baffle 602 needs to be increased to reduce the spacing. The control unit calculates the opening speed adjustment amount as:

[0097] v n+1 =v n +k2×(G n -Gref );

[0098] The purpose is to increase the number of particles falling into the return conveyor belt 700 per unit time, reduce the distance between particles, ensure that the particle materials are closely arranged, and facilitate accurate calculation of the total volume V of particles with qualified volume.

[0099] When O n ≤O ref And G n ≤G ref When , the system automatically determines that the arrangement of the granular materials on the return conveyor belt 700 is normal, and maintains the current opening speed of the limiting baffle 602:

[0100] v n+1 =v n ;

[0101] At the same time, the control unit must ensure that the opening speed is within the physical limit, that is, to meet v min ≤v n+1 ≤v max .

[0102] In summary, during each inspection, the material limiting baffle 602 moves at a speed v n The discharge port 601 is opened, and the granular material falls into the return conveyor belt 700 through the discharge slot 603. The first visual module 501 collects the image on the return conveyor belt, and the data processing unit calculates the stacking rate. n and spacing rate G n The control unit adjusts the opening speed v of the next detection work according to the calculation results. n+1 . Through the above cycle, the control system realizes dynamic adaptive adjustment of the opening speed of the limiting baffle 601. Through the above scheme, it can be ensured to a certain extent that the granular material is laid in a single layer with uniform spacing on the return conveyor belt as much as possible. The first visual module 501 can accurately identify the number of particles and obtain clear image data. The system performs quality assessment based on accurate data, which improves the reliability of the detection results. In addition, in order to allow the equipment to adapt to the differences in characteristics of different materials, the control adjustment coefficients k1 and k2 are added to the above mathematical model, so that the control system can set parameters according to the characteristics of different materials, thereby enhancing the adaptability of the system. The entire adjustment process does not require manual intervention, reducing the impact of human factors on the detection results. The material conveying device can automatically adapt to different batches and different types of granular materials. By dynamically adjusting the opening speed of the limiting baffle, it is ensured that the granular material is laid in a single layer on the return conveyor belt, arranged tightly, and evenly spaced, thereby improving the detection accuracy and efficiency. The following is a specific calculation case for the above improvement scheme:

[0103] Assume that in a continuous production batch, multiple rounds of testing are performed on the same type of granular material, and the speed is adjusted according to the visual data after each round of testing. The opening speed range of the limit damper is preset in the control system as: v min =0.20m / s,v max =2.0m / s, the stacking rate and spacing rate thresholds are: ref =0.20, G ref =0.25, the control adjustment coefficients are: k1=0.30 and k2=0.40.

[0104] During execution, after each round of detection, the first visual module 501 calculates the stacking rate of the granular material on the current return conveyor belt 700 through an image algorithm. n and spacing rate G n The following table lists the process from the first test to the second test, assuming that the stacking rate O obtained in each round of detection is n and spacing rate G n , and calculate the next opening speed of the limiting baffle 601 according to the control logic, as shown in the table below:

[0105]

[0106] From the above list, it can be seen that the stacking rate O detected by vision n and spacing rate G n

[0107] The system can dynamically and flexibly adjust the opening speed v of the material limiting baffle 602 to the discharge port 601 n+1 , to ensure that the granular material is better laid in a single layer on the surface of the return conveyor belt 700 during the next inspection, and to improve the recognition accuracy of the particle number and volume data by the first visual module 501. In summary, by using the above mathematical model and control logic, the system can be continuously iterated to achieve effective control of the distribution state of the granular material on the return conveyor belt, providing a good foundation for the subsequent accurate inspection of the first visual module 501, and can also further improve the overall accuracy and efficiency of material quality inspection.

[0108] In addition, this embodiment also implements a detection method for a material conveying device with a detection function, the steps of which include:

[0109] S1-1. Step of collecting test samples: collect a certain amount of granular material from the material conveying line as a test sample, and place the test sample in a metering hopper; (this step is implemented in conjunction with the vertical guide rail, lifting slider, material shovel and other units in the "online sampling mechanism 200" in the device structure: by controlling the material shovel to insert into the granular material being conveyed and rotate to take the material, a granular material sample of a predetermined mass or volume is obtained. This process ensures that the material sample is automatically collected without stopping the machine, and is sent to the metering hopper for subsequent testing).

[0110] S1-2, weighing and recording total weight step: use the weighing module to measure the total weight A of the inspection sample, and send A to the control system; (this step is performed by the weighing module 500, and this step realizes the initial mass (weight) measurement of the collected inspection sample to obtain the total weight A. The measurement data is recorded and saved by the control system for subsequent calculation of the ratio between the oversized particles and the total).

[0111] S1-3, step of separating samples of particles with excessive volume: particles with excessive volume in the test sample are blocked by the filter screen and retained on the filter screen, while particles with qualified volume pass through the filter screen and fall into the conveying channel; (in this step, particles with a volume exceeding the mesh size of the filter screen are retained on the filter screen, and the remaining particles with qualified volume pass through the filter screen and fall into the first inclined discharge channel 600 at the bottom, thereby realizing automatic separation of large particle size and qualified particle size).

[0112] S1-4, weighing and recording the weight of the sample of oversized particles: using the weighing module again to measure the weight A1 of the sample of oversized particles retained on the filter screen, and sending A1 to the control system; (this step simultaneously uses the weighing module 500 to continue to support the metering hopper 300, and measures the oversized particles retained on the filter screen again to obtain the weight A1, and then sends A1 to the control system to facilitate the calculation of the ratio of oversized particles to the total sample, thereby more intuitively reflecting the content of large particles).

[0113] S1-5. Calculate and draw curve graph X: The control system calculates the ratio of A1 to A R = A1 / A based on A and A1, obtains multiple sets of ratios R after repeated tests, and draws curve graph X based on R of each test to reflect the weight ratio of oversized particles in the batch of materials; (The control system calculates the ratio of A1 to A by formula based on the measured A and A1 The proportion R of oversized particles in each test is calculated and used as an important indicator for monitoring the quality of the batch of materials. With the accumulation of multiple tests, the system draws a curve graph X to show the trend of this proportion over time or batch, providing a basis for production or quality control).

[0114] It can be seen from the above execution method that by continuously or intermittently executing the above detection method on the production line, the weight proportion of large particles in the current batch of materials can be quickly determined, and the detection results can be intuitively presented on the curve graph X, which is convenient for quality monitoring personnel to grasp and make corresponding process or equipment adjustments in a timely manner. This method enables the evaluation of the mass proportion of oversized particles in the material to be completed automatically, reducing the errors and time costs caused by manual steps. By monitoring the proportion in real time through the curve graph X, batch quality fluctuations can be quickly discovered and corresponding measures can be taken to improve the quality of the final product. Compared with traditional manual sampling and screening methods, it improves detection accuracy and efficiency, while reducing manpower investment.

[0115] As a further improvement to the above detection method, this embodiment also includes the following steps:

[0116] S2-1. Calculate the weight of qualified volume particles: The control system calculates the weight of the qualified volume particle sample A2=A-A1 according to the total weight A of the test sample and the weight A1 of the oversized particle sample; (It can be understood that this step is based on A (total weight of the test sample) and A1 (weight of oversized particles) already obtained in the previous step, and the actual weight A2 of the qualified volume particles after passing through the filter screen is obtained by A2=A-A1. This weight A2 can eliminate the influence of abnormally large particles and better represent the quality attributes of materials within the normal particle size range).

[0117] S2-2, step of obtaining the size value of qualified volume particles: obtaining the diameter size value D of the qualified volume particles, where the size value D is a preset value or is determined through image analysis by the first visual module 501; (it can be understood that the characteristic size of the particles required for volume measurement in this step can be preset (applicable to specific materials and known particle size distribution), or can be calibrated through real-time image analysis by the first visual module 501. The diameter size value D of the qualified volume particles can provide a basis for subsequent calculation of the total volume V and more in-depth statistical analysis).

[0118] S2-3, step of calculating the total volume of qualified particles: using the image data obtained by the first visual module 501, the volume of the qualified particle samples that pass through the filter screen and are spread on the return material conveyor belt is measured to obtain the total volume V of the qualified particle samples; (it can be understood that this step uses the qualified particle image data captured by the first visual module 501, and combines the fixed angle between the module and the return material conveyor belt 700 and the known calibration parameters to realize the algorithmic analysis of the particle volume or the total accumulation volume of the particles. The system obtains the total volume V of the qualified particles through image recognition and geometric conversion (such as treating the particles as approximate spheres, cylinders or other approximate shapes).

[0119] S2-3, density calculation step: the system calculates the density of qualified volume particles according to A2 and the total volume V = A2 / V;

[0120] S2-4, drawing curve graph Z step: after repeated multiple tests, multiple groups of density ρ are obtained, and curve graph Z is drawn according to the ρ of each test to reflect the overall quality of the batch of materials; (It can be understood that this step is based on the formula The density of qualified volume particles is obtained, and a curve graph Z is drawn by accumulating multiple test results, which can reflect the stability or fluctuation of the overall quality of the batch of materials from a macro perspective).

[0121] From the above execution method, it can be seen that after identifying and removing oversized particles, further attention is paid to the density of qualified volume particles, so as to obtain more comprehensive particle quality indicators. The change trend of the density value can be intuitively displayed through the curve Z, so as to make precise adjustments to the upstream or downstream processes and achieve continuous process control. In addition, the density ρ can be used to determine whether there are gaps or irregularities inside the particles, so as to further identify potential quality problems. Density data is crucial for many granular products (food, chemical, pharmaceutical, etc.), which can be directly related to subsequent ingredients, packaging and performance, etc., combined with the existing automatic sampling, screening and image measurement steps, it greatly reduces manual intervention or subjective judgment, which is helpful for long-term batch monitoring and statistical analysis.

[0122] As a further improvement to the above detection method, this embodiment also includes the following steps:

[0123] S3-1. Step for detecting the number of particles with excessive volume: the image data of the inspection sample is collected by the second visual module 502 arranged above the metering hopper, and the control system analyzes the image to obtain the number B2 of particles with excessive volume; (it can be understood that in this step, the second visual module 502 is installed above the metering hopper 300, and can take pictures of the excessively large particles resting on the filter screen after screening, and count the number B2 of particles with excessive volume through the particle image recognition algorithm. The number B2 of particles corresponds to the weight A1 measured in the aforementioned detection method step, thereby constructing a two-way monitoring of the number of particles and the weight, and further improving the comprehensive analysis capability of the material).

[0124] S3-2, step of detecting the number of particles of the qualified volume particle sample: the image data of the qualified volume particle sample is collected by the first visual module 501 arranged above the return material conveyor belt, and the control system analyzes the image to obtain the number of particles B1 of the qualified volume particle sample; (it can be understood that, unlike the detection position of the number of particles B2 of particles with excessive volume, the qualified volume particles are photographed in the state of falling onto the return material conveyor belt 700 after passing through the filter screen. At this time, the first visual module 501 photographs the image of the particles in a flat state and performs particle recognition and counting. B1 is obtained through the recognition result to characterize the number of most normal particle size particles passing through the screen).

[0125] S3-3, ratio calculation step: the control system calculates the ratio of B1 to B2 Q = B1 / B2 according to B1 and B2, and obtains multiple groups of ratios Q after repeated detection; (it can be understood that by comparing B1 with B2, ).

[0126] S3-4, step of drawing graph Y: draw graph Y according to Q of each test to reflect the ratio of the number of qualified particles to the number of oversized particles in the batch of materials; (it can be understood that in this step, the graph Y is drawn with the Q value obtained from multiple tests as the vertical coordinate, which can clearly show whether the ratio between the number of qualified particles and the number of oversized particles is stable or fluctuates as the production or test batch progresses, thereby providing refined guidance for production process control).

[0127] It can be understood that in addition to mass (weight) detection, the above detection method also combines the quantity dimension to evaluate the quantitative ratio between qualified volume particles and oversized volume particles in the material, thereby enriching the quality judgment standard, and quickly identifying when the qualified rate is abnormal by accumulating data over a long period of time through the curve Y, and comprehensively locating the source of the problem in combination with other detection data. It complements the two aforementioned detection methods. The former focuses on the mass (weight) ratio, and the latter focuses on density and volume measurement. This detection method highlights the evaluation of the quantity ratio, and the quantity detection can often reveal the discreteness and uniformity of the particle distribution, making up for the limitations of pure weight detection. The automatic identification of the number of particles through the visual module can reduce the risk of manual intervention and ensure the stability and traceability of the detection data.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material conveying device with a detection function, characterized in that: include: A material conveying line (100) for conveying granular materials; An online sampling mechanism (200) is arranged above the material conveying line (100); A metering hopper (300) for loading a test sample of granular material; A screening mechanism (400) is disposed in the metering hopper (300), and the screening mechanism (400) is used to filter out particles with excessively large volumes in the test sample; A detection module, used for detecting data of test samples; A sample conveying mechanism, used for receiving and conveying the qualified volume particle sample dropped from the metering hopper (300) and screened out by the screening mechanism (400); The online sampling mechanism (200) collects a portion of the granular material on the material conveying line (100) as a test sample and transports the test sample to the metering hopper (300); the detection module detects data of the initial test sample entering the metering hopper (300), and detects data of particles with excessive volume in the test sample that are filtered by the screening mechanism (400) and retained in the metering hopper (300); and feeds back the quality of the material based on the ratio of the data of the particles with excessive volume to the data of the initial test sample.

2. The material conveying device with detection function according to claim 1, characterized in that: The detection module comprises: A weighing module (500) supports the bottom of the metering hopper (300) upwards; The weighing module (500) measures the total weight data of the test sample entering the metering hopper (300), and measures the weight data of the particles with excessive volume that are filtered by the screening mechanism (400) and retained in the metering hopper (300); The system provides feedback on the quality of the material based on the ratio of the weight data of the oversized particles to the weight data of the initial inspection sample.

3. The material conveying device with detection function according to claim 2, characterized in that: The detection module comprises: A first visual module (501) is used to detect volume-qualified particles in the test sample that pass through the screening mechanism (400); the first visual module (501) detects image data of the volume-qualified particles in the test sample; The system calculates the weight data of the particles with qualified volume according to the difference between the total weight of the inspection sample and the weight of the particles with excessive volume; The system calculates the total volume of the qualified volume particles according to the size values ​​of the qualified volume particles and the image data of the first visual module (501); The system calculates the density ρ of the qualified volume particles based on the weight data of the qualified volume particles and the total volume data; The system feeds back the quality of the material based on the density ρ of the qualified volume particles.

4. The material conveying device with detection function according to claim 3, characterized in that: The detection module comprises: A second visual module (502), disposed above the metering hopper (300), for collecting image data of the inspection sample in the metering hopper (300); The system calculates the number of particles with excessive volume through the image data of the second visual module (502), and calculates the number of particles with qualified volume through the image data of the first visual module (501); The system feeds back the quality of the material based on the ratio between the number of particles with acceptable volume and the number of particles with excessive volume.

5. The material conveying device with detection function according to claim 3, characterized in that: The sample conveying mechanism comprises a first inclined discharge channel (600), a return conveyor belt (700) and a second inclined discharge channel (800); The return conveyor belt (700) is located below the first visual module (501) and between the first inclined unloading channel (600) and the second inclined unloading channel (800); One end of the first inclined discharge channel (600) extends obliquely upward to the bottom discharge port of the metering hopper (300), and the other end extends obliquely downward to the top of the return conveyor belt (700); One end of the second inclined unloading channel (800) extends obliquely upward to below the return material conveyor belt (700), and the other end extends obliquely downward to above the material conveying line (100).

6. The material conveying device with detection function according to claim 5, characterized in that: The first inclined discharge channel (600) is provided with a discharge port (601) at one end close to the return conveyor belt (700), and a limited material baffle (602) is rotatably provided at the discharge port (601); The discharge port (601) is closed by the material limiting baffle (602), so that the qualified volume particles in the test sample that pass the filter screen (400) fall into the first inclined discharge channel (600) and are restricted in the first inclined discharge channel (600) by the material limiting baffle (602); The weighing module (500) is supported upwardly by the first inclined discharge channel (600) and the metering hopper (300) to obtain total weight data of the inspection sample by measuring the oversized particles retained in the metering hopper (300) and the qualified particles retained in the first inclined discharge channel (600); By controlling the limiting baffle (602) to deflect at a certain angle, a discharge gap (603) is formed between the lower edge of the limiting baffle (602) and the discharge port (601); the opening size of the discharge gap (603) is suitable for matching the diameter of particles with qualified volume, so as to allow particles with qualified volume to leave the first inclined discharge channel (600).

7. The material conveying device with detection function according to claim 1, characterized in that: The online sampling mechanism (200) comprises: A vertical guide rail (201) is arranged above the material conveying line (100); A lifting slider (202) slidably disposed on the vertical guide rail (201); A transverse guide rail (203) which is perpendicular to the vertical guide rail (201); A translation slider (204) is slidably disposed on the transverse guide rail (203) and connected to the vertical guide rail (201). The translation slider (204) drives the vertical guide rail (201) and the lifting slider (202) to move laterally along the transverse guide rail (203); Wherein, a material taking shovel (205) is rotatably provided at the bottom of the lifting slide block (202); The system controls the material scoop (205) to rotate upwards by a certain angle to scoop up the granular material on the material conveying line (100), and controls the material scoop (205) to rotate downwards by a certain angle to pour the granular material into the top opening of the metering hopper (300).

8. A detection method for a material conveying device with detection function, characterized in that: include: Collecting test samples step: collecting a certain amount of granular material from the material conveying line as a test sample, and placing the test sample in the measuring hopper; Weighing and recording total weight step: using the weighing module to measure the total weight A of the inspection sample, and sending A to the control system; Oversized particle sample separation step: Oversized particles in the test sample are blocked by the screening mechanism and retained on the screening mechanism, while qualified particles pass through the screening mechanism and fall into the conveying channel; Weighing and recording the weight of the over-volume and over-large particle sample: using the weighing module again to measure the weight A1 of the over-volume and over-large particle sample retained on the screening mechanism, and sending A1 to the control system; Step of calculating and drawing curve graph X: the control system calculates the ratio of A1 to A R=A1 / A according to A and A1, obtains multiple groups of ratios R after repeated detection, and draws curve graph X according to R of each detection to reflect the weight proportion of particles with excessive volume in the batch of materials.

9. The detection method of the material conveying device with detection function according to claim 8, characterized in that: include: Calculating the weight of qualified volume particles: The control system calculates the weight of qualified volume particle samples A2=A-A1 according to the total weight A of the inspection sample and the weight A1 of the over-volume and over-large particle samples; The step of obtaining the size value of the qualified volume particles is as follows: obtaining the diameter size value D of the qualified volume particles, wherein the size value D is a preset value or is determined by image analysis of the first visual module (501); The step of measuring the total volume of qualified volume particles is as follows: using the image data obtained by the first visual module (501), the volume of the qualified volume particle samples that pass the screening mechanism and are laid on the return material conveyor belt is measured to obtain the total volume V of the qualified volume particle samples; Calculating density ρ step: the system calculates the density ρ of the qualified volume particles according to A2 and the total volume V = A2 / V; Steps for drawing graph Z: After repeated testing, multiple groups of density ρ are obtained, and graph Z is drawn based on the ρ of each test to reflect the overall quality of the batch of materials.

10. The detection method of the material conveying device with detection function according to claim 8, characterized in that: include: The step of detecting the number of particles with too large a volume: collecting image data of the particles with too large a volume by a second visual module (502) arranged above the metering hopper, and analyzing the image by a control system to obtain the number B2 of particles with too large a volume; The step of detecting the number of particles in the volume-qualified particle sample is as follows: collecting image data of the volume-qualified particle sample by a first visual module (501) arranged above the return material conveyor belt, and the control system analyzes the image to obtain the number of particles B1 of the volume-qualified particle sample; Ratio calculation step: the control system calculates the ratio of B1 to B2, Q=B1 / B2, according to B1 and B2, and obtains multiple groups of ratios Q after repeated detection; Steps for drawing the curve Y: Draw the curve Y according to the Q of each test to reflect the quantity ratio between the qualified volume particles and the oversized volume particles of the batch of materials.

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