Multi-stage screw lifting and distributing device for food grinding powder and control system

Abstract

The invention discloses a multi-stage screw lifting and distributing device for food grinding powder and a control system, relates to the technical field of food grinding control, and solves the problem that the distribution accuracy and consistency of powder in each container are difficult to guarantee when the device is used for containers of various specifications. The material level monitoring end is tightly matched with the material bin feeding control end, the material level height of powder in the material bin is monitored in real time and compared with a preset value, and the feeding rate of the feeding screw is accurately controlled; the dynamic adjusting mechanism can ensure that the material level height in the stock bin is always in a standard reaching state, and the problems of production interruption or overflow and the like caused by insufficient or excessive powder are effectively avoided; the powder distribution processing end accurately calculates the volume of powder needing to be conveyed by each stock bin and the corresponding batching rate based on the volume parameters of the containers and the matching parameters of the stock bins; by means of the accurate batching mode, it can be guaranteed that each container can obtain the accurate powder amount, and the problem that powder is not evenly distributed is solved.

Description

Technical Field

[0001] The invention relates to the technical field of food grinding control, in particular to a device and a control system for multi-stage screw lifting and distribution of food grinding powder. Background Art

[0002] In the field of food production, the processing of food ground powder is a key link. With the continuous development of the food industry, the requirements for the processing efficiency, precision and degree of automation of food ground powder are increasing. In the traditional production process of food ground powder, there are many problems in the lifting and distribution of powder.

[0003] Early powder lifting mainly relied on simple mechanical devices, such as ordinary screw conveyors, which had low lifting efficiency and difficulty in achieving precise control of the lifting amount. In terms of silo feed control, there was a lack of effective real-time monitoring and adjustment mechanisms, and powder overflow or insufficient powder often occurred in the silo, which not only caused material waste, but also may lead to production interruptions, affecting the continuity of the entire production process and increasing production costs.

[0004] For the distribution of powder, the traditional methods mostly use manual operation or simple dosing devices, which cannot accurately distribute according to the volume of different containers and actual needs. When faced with containers of various specifications, it is difficult to ensure the accuracy and consistency of powder distribution in each container, which seriously affects the stability of product quality. Moreover, manual operation is easily interfered by human factors, the labor intensity is high, and it is difficult to improve production efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a device and a control system for multi-stage screw lifting and distribution of food grinding powder, which solves the problem of difficulty in ensuring the accuracy and consistency of powder distribution in each container when facing containers of various specifications.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-stage screw lifting and distribution control system for food grinding powder, comprising: The material level monitoring end monitors the material level height of the powder in the silo in real time, and transmits the real-time monitored material level height to the silo feeding control end, where the material level height of the powder in the silo is monitored by a designated material level sensor; The silo feed control end controls the feed screw associated with the silo based on the material level monitored by the material level monitoring end, adjusts the feed rate, and keeps the material level in the silo at the standard height in real time. The specific method is as follows: The material level height monitored in real time by the material level monitoring end is calibrated as H i , where i represents different moments, and the monitored material level height H i Check with the preset value Y1. If Hi <Y1, then generate adjustment signal, if H i ≥Y1, the material level of the silo is continuously monitored and the original feed rate is kept unchanged without any adjustment; Based on the generated adjustment signal, the feed screw associated with the silo is controlled to increase the feed rate of the original feed screw, and the material level height H is confirmed in real time based on the lifting process. i The value changes when the material level height H i When the material level in the silo increases, stop increasing the feeding rate of the feeding screw and keep the current feeding rate unchanged. i ≥Y1, the feeding rate of the feeding screw is reduced until the material level in the silo reaches H i Stop when no change occurs, and keep the current feed rate unchanged after the change; The visual monitoring end acquires the appearance image of the container that needs to participate in the powder distribution. The acquired image angles are all preset angles, and the acquired multi-directional appearance images of the corresponding container are transmitted to the container feature confirmation end; The container feature confirmation end performs preliminary processing on each appearance image in different directions based on the multi-directional appearance images of the corresponding container, confirms the image contour associated with the corresponding container in the corresponding direction, and then confirms the center point of the corresponding appearance image based on the image contour. Based on the image features confirmed by different appearance images, multiple groups of appearance images are combined to confirm the container model belonging to the corresponding container. The specific method is as follows: Based on the appearance images of different orientations associated with the corresponding containers, the appearance images of different orientations are initially processed: the pixel value associated with each pixel point in the appearance image is confirmed and calibrated as X i , where i represents different pixels, and then the pixel values ​​of other pixels around this pixel are confirmed, and the Sobel algorithm is used to confirm the lateral gradient HX associated with the corresponding pixel i And vertical gradient SX i , and then confirm the comprehensive gradient associated with the corresponding pixel point: Determine the comprehensive gradient ZH i ; The comprehensive gradient ZH associated with the corresponding pixel point i Check with the preset value Y2. If ZH i > Y2, the corresponding pixel point is marked as a gradient pixel point, where Y2 is the preset value. i When ≤Y2, no calibration is performed; Confirm the contours of several groups of gradient pixel points confirmed by the corresponding appearance image, connect adjacent gradient pixel points, and confirm the edge contour associated with the corresponding appearance image; Based on the edge contour associated with the corresponding appearance image, the edge contour is placed in a two-dimensional coordinate system, and then the two-dimensional coordinates associated with different contour points are determined, and several groups of two-dimensional coordinates are averaged to confirm the mean coordinates. Based on the location of the mean coordinates, the points associated with the mean coordinates are marked in the edge contour as the center point of the edge contour; Based on the edge contours and center points confirmed by the plurality of appearance images, the plurality of appearance images are combined to confirm a set of model bodies, and then the volume parameters of the model bodies are confirmed, and the confirmed volume parameters are transmitted to the powder distribution processing end; The powder distribution processing end determines the volume of powder that needs to be transported by this silo based on the volume parameters of the corresponding container and the proportion parameters of the corresponding silo, and adjusts the batching rate of the specified silo in real time based on the preset batching time to complete the powder distribution of this container. The specific method is as follows: Based on the determined volume parameter R of the container k , where k represents different containers, and then based on the ratio parameter P associated with the corresponding silo, where P is the preset value, use: R k ×P=F k Confirm the powder volume F that needs to be transported in the corresponding silo k ; Based on the preset batching time T, where T is the preset value, use: F k ÷T=V k Confirm the batching rate V of the corresponding silo with respect to this container k , and at this batching rate V k Carry out batching for this container and complete the batching process belonging to this silo.

[0007] Preferably, the multi-stage screw lifting and distributing device for food grinding powder comprises: The material level sensor monitors the material level of the powder in the silo in real time and transmits the real-time monitored material level to the feed controller; The feed controller controls the feed screw associated with the silo based on the material level monitored by the material level sensor, adjusts the feed rate, and keeps the material level in the silo at the standard height in real time; High-definition monitoring probes are used to obtain images of the appearance of containers that need to be involved in powder distribution. The image angles obtained are all preset angles. An image processor, based on the multi-directional appearance images of the corresponding container, performs preliminary processing on each appearance image in different directions, confirms the image contour associated with the corresponding container in the corresponding direction, then confirms the center point of the corresponding appearance image based on the image contour, and combines multiple groups of appearance images based on the image features confirmed by different appearance images to confirm the container model belonging to the corresponding container; The batching controller confirms the volume parameters of the corresponding container from the container model, and based on the ratio parameters of the corresponding silo, confirms the volume of powder that needs to be transported by this silo, and based on the preset batching time, adjusts the batching rate of the specified silo in real time to complete the powder distribution of this container.

[0008] The present invention provides a device and control system for multi-stage screw lifting and distribution of food grinding powder. Compared with the prior art, it has the following beneficial effects: The present invention closely cooperates with the material level monitoring end and the silo feeding control end, monitors the material level height of the powder in the silo in real time, and compares it with the preset value to accurately control the feeding rate of the feeding screw. This dynamic adjustment mechanism can ensure that the material level height in the silo is always in a standard state, effectively avoiding production interruption or overflow caused by insufficient or excessive powder, ensuring the continuity and stability of the production process, and improving production efficiency; The powder distribution processing end accurately calculates the volume of powder that needs to be transported to each silo and the corresponding batching rate based on the volume parameters of the container and the ratio parameters of the silo. This precise batching method can ensure that each container can obtain an accurate amount of powder, avoiding the problem of uneven powder distribution, helping to improve the consistency and stability of product quality and meet the strict requirements of different production processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the principle framework of the present invention. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] Embodiment 1 See also Figure 1 , the present application provides a food grinding powder multi-stage screw lifting distribution control system, including a material level monitoring end, a silo feeding control end, a visual monitoring end, a container feature confirmation end and a powder distribution processing end, wherein the material level monitoring end, the silo feeding control end and the powder distribution processing end are electrically connected from the output node to the input node in sequence, and the visual monitoring end, the container feature confirmation end and the powder distribution processing end are electrically connected from the output node to the input node in sequence; Among them, the material level monitoring end monitors the material level height of the powder in the silo in real time, and transmits the real-time monitored material level height to the silo feeding control end, wherein the material level height of the powder in the silo is monitored by a designated material level sensor, which is selected by relevant personnel, and can monitor the material level height of the corresponding powder in the silo in real time, and display the real-time monitored material level height numerically; Among them, the silo feed control end controls the feed screw associated with the silo based on the material level height monitored by the material level monitoring end, adjusts the feed rate, and keeps the material level height in the silo at the standard height in real time. The specific method of adjusting the feed rate is: The material level height monitored in real time by the material level monitoring end is calibrated as H i , where i represents different moments, and the monitored material level height H i Check with the preset value Y1. If H i <Y1, an adjustment signal is generated (indicating that the feed rate needs to be adjusted to ensure the material level height of the corresponding powder in this silo). i ≥Y1, the material level of the silo is continuously monitored and the original feed rate is kept unchanged without any adjustment; Based on the generated adjustment signal, the feed screw associated with the silo is controlled to increase the feed rate of the original feed screw, and the material level height H is confirmed in real time based on the lifting process. i The value changes when the material level height H i When the material level in the silo increases, stop increasing the feeding rate of the feeding screw and keep the current feeding rate unchanged. i ≥Y1, the feeding rate of the feeding screw is reduced until the material level in the silo reaches H i Stop when there is no change, and keep the current feeding rate unchanged (when the corresponding silo is distributing powder, the associated feeding rate will change for different containers, so the feeding rate needs to be adjusted in real time to adapt to the related changes of different feeding rates in the corresponding silo, and ensure that the height of the corresponding powder in the silo remains unchanged).

[0012] Among them, the visual monitoring end acquires the appearance image of the container that needs to participate in the powder distribution. The acquired image angles are all preset angles, which are set in advance by the operator (generally, it is necessary to acquire the top view and side views of the container appearance in different directions). The visual monitoring end is provided with multiple groups to acquire images of the container at the specified position, and based on the acquired related appearance images belonging to different directions, confirm the overall model of the corresponding container, so as to confirm the overall volume associated with the corresponding container, which is convenient for the specific filling process of the powder, and can adapt to the powder distribution of containers of different sizes, and transmit the acquired multi-directional appearance images of the corresponding container to the container feature confirmation end; The container feature confirmation end performs preliminary processing on each appearance image in different directions based on the multi-directional appearance images of the corresponding container, confirms the image contour associated with the corresponding container in the corresponding direction, and then confirms the center point of the corresponding appearance image based on the image contour. Based on the image features confirmed by different appearance images, multiple groups of appearance images are combined to confirm the container model belonging to the corresponding container. The specific method of confirmation is as follows: Based on the appearance images of different orientations associated with the corresponding containers, the appearance images of different orientations are initially processed: the pixel value associated with each pixel point in the appearance image is confirmed and calibrated as X i , where i represents different pixels, and then the pixel values ​​of other pixels around this pixel are confirmed, and the Sobel algorithm is used to confirm the lateral gradient HX associated with the corresponding pixel i And vertical gradient SX i Specifically, when confirming the horizontal gradient and vertical gradient, different weights are assigned to each different pixel point around and the pixel point, and the weights are all preset values. Then the relevant values ​​after the weights are added up to confirm the horizontal gradient and vertical gradient associated with the corresponding pixel point. Since the method of using Sobel to confirm the horizontal gradient and vertical gradient of the corresponding pixel point is more common in the prior art, it will not be described in detail here. Then confirm the comprehensive gradient associated with the corresponding pixel point: Determine the comprehensive gradient ZH i ; The comprehensive gradient ZH associated with the corresponding pixel point i Check with the preset value Y2. If ZH i ≤Y2, no calibration is performed. If ZH i >Y2, the corresponding pixel point is marked as a gradient pixel point, where Y2 is a preset value, and its specific value is determined by the operator based on experience. Based on the setting of the preset value Y2, the corresponding gradient pixel point is determined, that is, the contour point of the corresponding container; Confirm the contours of several groups of gradient pixel points confirmed by the corresponding appearance image, connect adjacent gradient pixel points, confirm the edge contour associated with the corresponding appearance image, and place the edge contour in a two-dimensional coordinate system based on the edge contour associated with the corresponding appearance image, then determine the two-dimensional coordinates associated with different contour points, perform mean processing on several groups of two-dimensional coordinates, confirm the mean coordinates, and based on the location of the mean coordinates, mark the point associated with the mean coordinates in the edge contour as the center point of the edge contour; Based on the edge contours and center points confirmed by the plurality of appearance images, the plurality of appearance images are combined to confirm a set of model bodies, and then the volume parameters of the model bodies are confirmed, and the confirmed volume parameters are transmitted to the powder distribution processing end; Specifically, by analyzing the pixel value of each pixel in the appearance image and the pixel value of its surrounding pixels, using the Sobel algorithm and assigning different weights to calculate the horizontal and vertical gradients, it is possible to more accurately capture the areas in the image where the pixel value changes significantly. Compared with the general edge detection method, this refined processing method can effectively distinguish the edge of the container from the background, thereby accurately determining the gradient pixel points, and then obtaining the contour points of the corresponding container, providing accurate basic data for the subsequent container model construction; the confirmed edge contour is placed in a two-dimensional coordinate system, and the center point is determined by averaging the two-dimensional coordinates of the contour points. This method fully considers the distribution of the entire edge contour, and the center point obtained can better represent the geometric center of the appearance image in this orientation. Based on this center point, the subsequent image combination and model construction enhance the stability and accuracy of the model, making the container model more reasonable in image fusion at different orientations.

[0013] Among them, the powder distribution processing end confirms the volume of powder that needs to be transported by this silo based on the volume parameters of the corresponding container and the proportion parameters of the corresponding silo, and adjusts the batching rate of the designated silo in real time based on the preset batching time to complete the powder distribution of this container. The specific method of powder distribution is as follows: Based on the determined volume parameter R of the container k , where k represents different containers, and then based on the ratio parameter P associated with the corresponding silo, where P is a preset value, which is prepared in advance by the operator and is a percentage, such as 20%, 30% and 50%, using: R k ×P=F k Confirm the powder volume F that needs to be transported in the corresponding silo k ; Then based on the preset batching time T, where T is a preset value, it is prepared by the operator in advance based on experience. The setting of T value is generally determined based on the conveying distance of the conveyor belt between the corresponding silos. The reason for limiting the batching time is to ensure that the containers on the corresponding conveyor belt will not be stranded, so as to adjust the batching rate of the batching silo. The following is adopted: F k ÷T=V k Confirm the batching rate V of the corresponding silo with respect to this container k , and at this batching rate V k The batching process for this container is completed, and the batching process for this silo is completed. For the batching of other powders in other silos in the future, the same processing method is used to determine the specific batching to ensure the balanced batching of the corresponding container and achieve better batching processing effect.

[0014] Embodiment 2 The multi-stage screw lifting and distributing device for food grinding powder comprises: The material level sensor monitors the material level of the powder in the silo in real time and transmits the real-time monitored material level to the feed controller; The feed controller controls the feed screw associated with the silo based on the material level monitored by the material level sensor, adjusts the feed rate, and keeps the material level in the silo at the standard height in real time; High-definition monitoring probes are used to obtain images of the appearance of containers that need to be involved in powder distribution. The image angles obtained are all preset angles. An image processor, based on the multi-directional appearance images of the corresponding container, performs preliminary processing on each appearance image in different directions, confirms the image contour associated with the corresponding container in the corresponding direction, then confirms the center point of the corresponding appearance image based on the image contour, and combines multiple groups of appearance images based on the image features confirmed by different appearance images to confirm the container model belonging to the corresponding container; The batching controller confirms the volume parameters of the corresponding container from the container model, and based on the ratio parameters of the corresponding silo, confirms the volume of powder that needs to be transported by this silo, and based on the preset batching time, adjusts the batching rate of the specified silo in real time to complete the powder distribution of this container.

[0015] Some of the data in the above formulas are dimensionless and numerically calculated. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0016] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A multi-stage screw lifting and distribution control system for food grinding powder, characterized in that: include: The material level monitoring end monitors the material level height of the powder in the silo in real time, and transmits the real-time monitored material level height to the silo feeding control end, where the material level height of the powder in the silo is monitored by a designated material level sensor; The silo feed control end controls the feed screw associated with the silo based on the material level monitored by the material level monitoring end, adjusts the feed rate, and keeps the material level in the silo at the standard height in real time; The visual monitoring end acquires the appearance image of the container that needs to participate in the powder distribution. The acquired image angles are all preset angles, and the acquired multi-directional appearance images of the corresponding container are transmitted to the container feature confirmation end; The container feature confirmation end performs preliminary processing on each appearance image in different directions based on the multi-directional appearance images of the corresponding container, confirms the image contour associated with the corresponding container in the corresponding direction, and then confirms the center point of the corresponding appearance image based on the image contour. Based on the image features confirmed by different appearance images, multiple groups of appearance images are combined to confirm the container model belonging to the corresponding container; The powder distribution processing end confirms the volume of powder that needs to be transported by this silo based on the volume parameters of the corresponding container and the proportion parameters of the corresponding silo, and adjusts the batching rate of the designated silo in real time based on the preset batching time to complete the powder distribution for this container.

2. The food grinding powder multi-stage screw lifting distribution control system according to claim 1 is characterized in that: The specific method for adjusting the feeding rate at the silo feeding control end is as follows: The material level height monitored in real time by the material level monitoring end is calibrated as H i , where i represents different moments, and the monitored material level height H i Check with the preset value Y1. If H i <Y1, then generate adjustment signal, if H i ≥Y1, the material level of the silo is continuously monitored and the original feed rate is kept unchanged without any adjustment; Based on the generated adjustment signal, the feed screw associated with the silo is controlled to increase the feed rate of the original feed screw, and the material level height H is confirmed in real time based on the lifting process. i The value changes when the material level height H i When the material level in the silo increases, stop increasing the feeding rate of the feeding screw and keep the current feeding rate unchanged. i ≥Y1, the feeding rate of the feeding screw is reduced until the material level in the silo reaches H i Stop when no change occurs and keep the current feed rate unchanged.

3. The food grinding powder multi-stage screw lifting distribution control system according to claim 1, characterized in that: The specific method of the container feature confirmation end confirming the image contour of the corresponding orientation appearance image is: Based on the appearance images of different orientations associated with the corresponding containers, the appearance images of different orientations are initially processed: the pixel value associated with each pixel point in the appearance image is confirmed and calibrated as X i , where i represents different pixels, and then the pixel values ​​of other pixels around this pixel are confirmed, and the Sobel algorithm is used to confirm the lateral gradient HX associated with the corresponding pixel i And vertical gradient SX i , and then confirm the comprehensive gradient associated with the corresponding pixel point: Determine the comprehensive gradient ZH i ; The comprehensive gradient ZH associated with the corresponding pixel point i Check with the preset value Y2. If ZH i >Y2, the corresponding pixel point is marked as a gradient pixel point, where Y2 is a preset value; Contours of several groups of gradient pixel points confirmed by the corresponding appearance image are confirmed, and adjacent gradient pixel points are connected to confirm the edge contour associated with the corresponding appearance image.

4. The food grinding powder multi-stage screw lifting distribution control system according to claim 3 is characterized in that: If ZH i When ≤Y2, no calibration is performed.

5. The food grinding powder multi-stage screw lifting distribution control system according to claim 3, characterized in that: The specific method of the container feature confirmation end confirming the container model of the corresponding container is: Based on the edge contour associated with the corresponding appearance image, the edge contour is placed in a two-dimensional coordinate system, and then the two-dimensional coordinates associated with different contour points are determined, and several groups of two-dimensional coordinates are averaged to confirm the mean coordinates. Based on the location of the mean coordinates, the points associated with the mean coordinates are marked in the edge contour as the center point of the edge contour; Based on the edge contours and center points confirmed by the several groups of appearance images, the several groups of appearance images are combined to confirm a group of model bodies, and then the volume parameters of the model bodies are confirmed, and the confirmed volume parameters are transmitted to the powder distribution processing end.

6. The food grinding powder multi-stage screw lifting distribution control system according to claim 5, characterized in that: The specific method of powder distribution at the powder distribution processing end is as follows: Based on the determined volume parameter R of the container k , where k represents different containers, and then based on the ratio parameter P associated with the corresponding silo, where P is the preset value, use: R k ×P=F k Confirm the powder volume F that needs to be transported in the corresponding silo k ; Based on the preset batching time T, where T is the preset value, use: F k ÷T=V k Confirm the batching rate V of the corresponding silo with respect to this container k , and at this batching rate V k Carry out batching for this container and complete the batching process belonging to this silo.

7. A multi-stage screw lifting and distributing device for food ground powder, the device operates according to the multi-stage screw lifting and distributing control system for food ground powder according to any one of claims 1 to 6, characterized in that: include: The material level sensor monitors the material level of the powder in the silo in real time and transmits the real-time monitored material level to the feed controller; The feed controller controls the feed screw associated with the silo based on the material level monitored by the material level sensor, adjusts the feed rate, and keeps the material level in the silo at the standard height in real time; High-definition monitoring probes are used to obtain images of the appearance of containers that need to be involved in powder distribution. The image angles obtained are all preset angles. An image processor, based on the multi-directional appearance images of the corresponding container, performs preliminary processing on each appearance image in different directions, confirms the image contour associated with the corresponding container in the corresponding direction, then confirms the center point of the corresponding appearance image based on the image contour, and combines multiple groups of appearance images based on the image features confirmed by different appearance images to confirm the container model belonging to the corresponding container; The batching controller confirms the volume parameters of the corresponding container from the container model, and based on the ratio parameters of the corresponding silo, confirms the volume of powder that needs to be transported by this silo, and based on the preset batching time, adjusts the batching rate of the specified silo in real time to complete the powder distribution of this container.

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