A method for controlling the frequency of a motor of a feed rationing belt in cooperation with an electronic scale

Abstract

This invention discloses a method for controlling the frequency of a feed belt motor in conjunction with an electronic scale. The key technical points are as follows: S1. Determining the instantaneous flow rate of the electronic scale; S2. Obtaining the instantaneous flow rate status of the electronic scale when the instantaneous flow rate of the electronic scale in step S1 is less than a set value; S3. Recording the duration of the instantaneous flow rate status of the electronic scale in step S2; S4. Determining the triggering state of the low-level phototube; S5. Recording the duration of the triggering state of the low-level phototube in step S3; S6. Determining the triggering state of the medium-level phototube, wherein the triggering state of the medium-level phototube is "triggered"; S7. Recording the duration of the triggering state of the medium-level phototube in step S5; S8. Determining the instantaneous flow rate status of the material; S9. Adjusting the frequency of the feed belt motor. This invention is mainly used to achieve automatic adjustment and control of the feed belt frequency, ultimately improving the accuracy of process control and realizing automated control of the feed belt motor frequency.

Description

Technical Field

[0001] This invention relates to the field of tobacco feeding, and more particularly to a method for controlling the frequency of a feeding metering motor in conjunction with an electronic scale. Background Technology

[0002] In industrial production, to ensure a continuous and stable flow of processed materials, feeding devices such as feeders and limiting tubes are typically installed at the front end of quantitative belt scales. In the hot-end feeding system of dry ice expansion lines in the tobacco manufacturing industry, a limiting tube is installed, but a feeder or similar device is not. However, the limiting tube is often insufficient to ensure the stability of the instantaneous flow rate of the material. During normal production, the amount of material flow depends on the operating frequency of the quantitative belt motor. In actual production, its control logic is not intelligent enough or automated enough, and operators often need to frequently set the operating frequency of the quantitative belt based on the material conveying conditions.

[0003] Therefore, in order to improve the stable quantitative operation of the feeding system and reduce manual intervention, there is an urgent need for a control method for the frequency of the feeding quantitative motor in conjunction with the electronic scale, so that the frequency of the feeding motor can be automatically adjusted, thereby improving stability, intelligence and automation. Summary of the Invention

[0004] To address the above shortcomings, this invention provides a method for controlling the frequency of a feeding quantitative belt motor in conjunction with an electronic scale. This method can intelligently analyze the material flow trend of the electronic scale's limiting tube, identify whether the frequency of the feeding quantitative belt motor needs adjustment, and determine whether to increase or decrease it. This allows for selective control and adjustment of the feeding quantitative belt motor frequency, enabling automatic adjustment of the feeding motor frequency and improving stability, intelligence, and automation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for controlling the frequency of a feeding quantitative belt motor in conjunction with an electronic scale, comprising the following steps:

[0006] S1. Determine the instantaneous flow rate of the electronic scale;

[0007] S2. When the instantaneous flow rate of the electronic scale is smaller than the set value in step S1, the instantaneous flow rate status of the electronic scale is obtained;

[0008] S3. Record the duration of the instantaneous flow rate status of the electronic scale in step S2;

[0009] S4. Determine the triggering state of the low-level phototube, wherein the triggering state of the low-level phototube includes: triggered, not triggered;

[0010] S5. Record the duration of the trigger state of the low-level phototube in step S3;

[0011] S6. Determine the triggering state of the middle material level phototube, wherein the triggering state of the middle material level phototube is triggering;

[0012] S7. Record the duration of the trigger state of the photoelectric tube at the medium material level in step S5;

[0013] S8. Determine the instantaneous flow rate of the material based on the parameters in steps S2-S7;

[0014] S9. Adjust the frequency of the metering belt motor according to the instantaneous flow rate of the material in step S8.

[0015] Specifically, the instantaneous flow status of the material in step S8 includes: upward trend, downward trend, and stable trend.

[0016] Specifically, the upward trend of the instantaneous material flow rate includes upward trend scenario 1 and upward trend scenario 2; upward trend scenario 1: when the trigger state of the medium material level photocell is triggered, and the duration of this state is greater than 3 seconds; upward trend scenario 2: when the trigger state of the low material level photocell is triggered, and the duration of this state is greater than 5 minutes.

[0017] Specifically, the downward trend of the instantaneous flow rate of the material includes downward trend scenario 1 and downward trend scenario 2; downward trend scenario 1 is when the trigger state of the low material level phototube is not triggered, and the duration of this state is greater than 4 minutes; upward trend scenario 2 is when the duration of the instantaneous flow rate of the electronic scale is greater than 3 seconds.

[0018] Specifically, the stable trend of the instantaneous flow rate of the material includes stable trend situation 1 and stable trend situation 2; stable trend situation 1 is: when the triggering state of the low material level phototube is not triggered, and the duration of this state is less than 4 minutes; stable trend situation 2 is: when the triggering state of the low material level phototube is triggered, and the duration of this state is less than 5 minutes.

[0019] Specifically, in step S9, when the instantaneous flow rate of the material is in an upward trend (case 1), the frequency of the metering belt motor is adjusted to the frequency of the metering belt motor minus 2, and then increased by 0.5 after 2 minutes, and then increased by 1 after another minute; when the instantaneous flow rate of the material is in an upward trend (case 2), the frequency of the metering belt motor is adjusted to the frequency of the metering belt motor minus 0.5.

[0020] Specifically, in step S9, when the instantaneous flow rate of the material is in a downward trend (case 1), the frequency of the metering belt motor is adjusted to the metering belt motor frequency plus 0.5, and then reduced by 0.5 after 3 minutes; when the instantaneous flow rate of the material is in a downward trend (case 2), the frequency of the metering belt motor is adjusted to the metering belt motor frequency plus 2, and then reduced by 0.5 after 40 seconds.

[0021] Specifically, in step S9, when the instantaneous flow rate of the material is in a stable trend, the frequency of the metering belt motor is not adjusted.

[0022] Compared with the prior art, the beneficial effects of the present invention are: by judging parameters such as the instantaneous flow rate of the electronic scale and the instantaneous flow rate of the material, the present invention realizes automatic adjustment and control of the quantitative belt frequency, and ultimately improves the accuracy of process control and realizes automated control of the frequency of the feeding belt motor without human intervention, and ensures that the instantaneous flow rate of the electronic scale is relatively stable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0024] Figure 1 This is a flowchart of a method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale according to the present invention;

[0025] Figure 2 This is a schematic diagram of the frequency algorithm for a feeding quantitative belt motor frequency control method in conjunction with an electronic scale according to the present invention;

[0026] Figure 3 This is a schematic diagram of the set frequency curve of the quantitative belt when the upward trend of the feeding quantitative belt motor frequency control method in conjunction with the electronic scale is 1.

[0027] Figure 4 This is a schematic diagram of the set frequency curve of the quantitative belt when the upward trend of the feeding quantitative belt motor frequency control method in conjunction with the electronic scale is shown in case 2.

[0028] Figure 5 This is a schematic diagram of the set frequency curve of the quantitative belt when the feeding quantitative belt motor frequency control method in conjunction with the electronic scale of the present invention is in case 1 of the downward trend.

[0029] Figure 6 This is a schematic diagram of the set frequency curve of the quantitative belt when the feeding quantitative belt motor frequency control method in conjunction with the electronic scale of the present invention is in case 2 of the downward trend. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1 As shown, the present invention provides a method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale, comprising the following steps:

[0034] S1. Determine the instantaneous flow rate of the electronic scale;

[0035] S2. When the instantaneous flow rate of the electronic scale is smaller than the set value in step S1, the instantaneous flow rate status of the electronic scale is obtained;

[0036] S3. Record the duration of the instantaneous flow rate status of the electronic scale in step S2;

[0037] S4. Determine the triggering state of the low-level phototube, wherein the triggering state of the low-level phototube includes: triggered, not triggered;

[0038] S5. Record the duration of the trigger state of the low-level phototube in step S3;

[0039] S6. Determine the triggering state of the middle material level phototube, wherein the triggering state of the middle material level phototube is triggering;

[0040] S7. Record the duration of the trigger state of the photoelectric tube at the medium material level in step S5;

[0041] S8. Determine the instantaneous flow rate of the material based on the parameters in steps S2-S7;

[0042] S9. Adjust the frequency of the metering belt motor according to the instantaneous flow rate of the material in step S8.

[0043] The instantaneous flow status of materials in step S8 includes: upward trend, downward trend, and stable trend.

[0044] The upward trend of the instantaneous flow rate of the material includes upward trend situation 1 and upward trend situation 2; the upward trend situation 1 is when the trigger state of the medium material level phototube is triggered and the duration of this state is greater than 3 seconds; the upward trend situation 2 is when the trigger state of the low material level phototube is triggered and the duration of this state is greater than 5 minutes.

[0045] The downward trend of the instantaneous flow rate of the material includes downward trend situation 1 and downward trend situation 2; the downward trend situation 1 is: when the trigger state of the low material level phototube is not triggered, and the duration of this state is greater than 4 minutes; the upward trend situation 2 is: the duration of the instantaneous flow rate of the electronic scale is greater than 3 seconds.

[0046] The stable trend of the instantaneous flow rate of the material includes stable trend situation 1 and stable trend situation 2; stable trend situation 1 is: when the triggering state of the low material level phototube is not triggered, and the duration of this state is less than 4 minutes; stable trend situation 2 is: when the triggering state of the low material level phototube is triggered, and the duration of this state is less than 5 minutes.

[0047] like Figure 2 As shown, the method for adjusting the frequency of the quantitative belt motor is as follows:

[0048] In step S9, when the instantaneous flow rate of the material is in an upward trend (case 1), such as... Figure 3 As shown, the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor minus 2, and after 2 minutes it is increased by 0.5, and after another 1 minute it is increased by 1. In this case, the control will not be repeated within 5 minutes after the first intervention setting; in addition, when the intervention occurs in the upward trend situation 1, the relevant control of the upward trend situation 2 will be ineffective for 5 minutes.

[0049] When the instantaneous flow rate of the material shows an upward trend (case 2), such as... Figure 4 As shown, the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor minus 0.5. In this case, it will not participate in the control again within 1 minute after the initial intervention setting.

[0050] In step S9, when the instantaneous flow rate of the material is in a downward trend (case 1), such as... Figure 5 As shown, the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor plus 0.5, and then reduced by 0.5 after 3 minutes. In this case, the control will not be repeated within 5 minutes after the initial intervention setting. In addition, when the downward trend situation 2 is intervened, the relevant control of the downward trend situation 1 will be ineffective for 5 minutes.

[0051] When the instantaneous flow rate of the material is in a downward trend (case 2), such as... Figure 6As shown, the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor plus 2, and then reduced by 0.5 after 40 seconds. In this case, the control will not be repeated within 5 minutes after the initial intervention setting.

[0052] In step S9, when the instantaneous flow rate of the material is in a stable trend, the frequency of the metering belt motor is not adjusted.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale, comprising the following steps: S1. Determine the instantaneous flow rate of the electronic scale; S2. When the instantaneous flow rate of the electronic scale is smaller than the set value in step S1, the instantaneous flow rate status of the electronic scale is obtained; S3. Record the duration of the instantaneous flow rate status of the electronic scale in step S2; S4. Determine the triggering state of the low-level phototube, wherein the triggering state of the low-level phototube includes: triggered, not triggered; S5. Record the duration of the trigger state of the low-level phototube in step S3; S6. Determine the triggering state of the middle material level phototube, wherein the triggering state of the middle material level phototube is triggering; S7. Record the duration of the trigger state of the phototube at the medium material level in step S5; S8. Determine the instantaneous flow rate of the material based on the parameter information in steps S2-S7; S9. Adjust the frequency of the metering belt motor according to the instantaneous flow rate of the material in step S8; The instantaneous flow rate status of materials in step S8 includes: upward trend, downward trend, and stable trend; The upward trend of the instantaneous material flow rate includes upward trend situation 1 and upward trend situation 2; upward trend situation 1: when the trigger state of the medium material level photocell is triggered, and the duration of this state is greater than 3 seconds; upward trend situation 2: when the trigger state of the low material level photocell is triggered, and the duration of this state is greater than 5 minutes. The downward trend of the instantaneous flow rate of the material includes two scenarios: downward trend scenario 1 and downward trend scenario 2. Downward trend scenario 1 is when the low-level photocell is not triggered and the duration of this state is greater than 4 minutes. Downward trend scenario 2 is when the duration of the instantaneous flow rate of the electronic scale is greater than 3 seconds. In step S9, when the instantaneous flow rate of the material is in a downward trend (condition 1), the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor plus 0.5, and then reduced by 0.5 after 3 minutes; when the instantaneous flow rate of the material is in a downward trend (condition 2), the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor plus 2, and then reduced by 0.5 after 40 seconds.

2. The method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale according to claim 1, characterized in that: The stable trend of the instantaneous flow rate of the material includes stable trend situation 1 and stable trend situation 2; stable trend situation 1 is: when the triggering state of the low material level phototube is not triggered, and the duration of this state is less than 4 minutes; stable trend situation 2 is: when the triggering state of the low material level phototube is triggered, and the duration of this state is less than 5 minutes.

3. The method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale according to claim 1, characterized in that: In step S9, when the instantaneous flow rate of the material is in an upward trend (condition 1), the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor minus 2, and then increased by 0.5 after 2 minutes, and then increased by 1 after another minute; when the instantaneous flow rate of the material is in an upward trend (condition 2), the frequency of the quantitative belt motor is adjusted to the frequency of the quantitative belt motor minus 0.

5.

4. The method for controlling the frequency of a feeding metering belt motor in conjunction with an electronic scale according to claim 1, characterized in that: In step S9, when the instantaneous flow rate of the material is in a stable trend, the frequency of the metering belt motor is not adjusted.

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