Method for controlling motor frequency of feeding quantitative belt matched with electronic scale

Abstract

The invention discloses a method for controlling the motor frequency of a feeding quantitative belt matched with an electronic scale. According to the technical scheme, the method comprises the steps that S1, the instantaneous flow of an electronic scale is determined; s2, when the instantaneous flow of the electronic scale in the step S1 is smaller than a set value, the instantaneous flow state of the electronic scale is obtained; s3, recording the duration of the instantaneous flow state of the electronic scale in the step S2; s4, the triggering state of the low-material-level photoelectric tube is determined; s5, recording the time length of the triggering state of the low-material-level photoelectric tube in the step S3; s6, the triggering state of a middle material level photoelectric tube is determined, wherein the triggering state of the middle material level photoelectric tube is triggering; s7, recording the time length of the triggering state of the middle material level photoelectric tube in the step S5; s8, the instantaneous flow state of the materials is determined; and S9, adjusting the motor frequency of the quantitative belt. The method is mainly used for achieving automatic adjustment and control over the frequency of the quantitative belt, finally improving the precision of process control and achieving automatic control over the frequency of the feeding belt motor.

Description

Technical Field

[0001] The invention relates to the field of tobacco feeding, and in particular to a method for controlling the frequency of a feeding quantitative belt motor matched with an electronic scale. Background Art

[0002] In industrial production, in order to ensure the continuous and stable flow of processed materials, feeding devices such as feeders and limit tubes are usually installed at the front end of the quantitative belt scale. In the hot end feeding system of the dry ice expansion line in the tobacco manufacturing industry, a limiting tube is set up as a feeding device, but there is no feeder or other devices. However, the limiting tube is often not enough to meet the stability of the instantaneous flow of materials. In 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 and automated enough, and operators often need to frequently set the operating frequency of the quantitative belt according to the material transportation situation.

[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 belt motor in conjunction with an electronic scale, so that the feeding motor frequency can be automatically adjusted to improve stability, intelligence, and automation. Summary of the invention

[0004] In view of the above shortcomings, the present invention provides a control method for the frequency of a feeding quantitative belt motor in conjunction with an electronic scale, which can intelligently analyze the material flow trend of the electronic scale limit tube through a program, identify whether the frequency of the feeding quantitative belt motor needs to be adjusted, and determine whether to increase or decrease it, thereby selectively controlling and adjusting the frequency of the feeding quantitative belt motor, so that the frequency of the feeding motor can be automatically adjusted, thereby improving stability, intelligence, and automation.

[0005] To achieve the above object, 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: S1. Determine the instantaneous flow rate of the electronic scale; S2. When the instantaneous flow rate of the electronic scale in step S1 is smaller than the set value, the instantaneous flow rate state of the electronic scale is obtained; S3. Record the duration of the instantaneous flow state of the electronic scale in step S2; S4. Determine the trigger state of the low-level photoelectric tube, the trigger state of the low-level photoelectric tube includes: triggered, not triggered; S5. Record the duration of the trigger state of the low-level photoelectric tube in step S3; S6. Determine the trigger state of the material level photoelectric tube, the trigger state of the material level photoelectric tube is triggered; S7. Record the duration of the trigger state of the material level photoelectric tube in step S5; S8. Determine the instantaneous flow state of the material according to the parameters of steps S2-S7; S9. Adjust the frequency of the quantitative belt motor according to the instantaneous flow state of the material in step S8.

[0006] In particular, the instantaneous flow state of the material in step S8 includes: an upward trend, a downward trend, and a stable trend.

[0007] In particular, the rising trend of the instantaneous flow state of the material includes rising trend situation 1 and rising trend situation 2; the rising trend situation 1: when the trigger state of the middle material level photoelectric tube is triggered, and the duration of this state is greater than 3 seconds; the rising trend situation 2: when the trigger state of the low material level photoelectric tube is triggered, and the duration of this state is greater than 5 minutes.

[0008] In particular, the downward trend of the instantaneous flow state 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 photoelectric tube 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 state of the electronic scale is greater than 3 seconds.

[0009] In particular, the stable trend of the instantaneous flow state of the material includes stable trend situation 1 and stable trend situation 2; the stable trend situation 1 is: when the trigger state of the low material level photoelectric tube is not triggered, and the duration of this state is less than 4 minutes; the stable trend situation 2 is: when the trigger state of the low material level photoelectric tube is triggered, and the duration of this state is less than 5 minutes.

[0010] In particular, in step S9, when the instantaneous flow state of the material is an upward trend situation 1, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 2, and then added to 0.5 after 2 minutes, and then added to 1 after another minute; when the instantaneous flow state of the material is an upward trend situation 2, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 0.5.

[0011] In particular, in step S9, when the instantaneous flow state of the material is a downward trend situation 1, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 0.5, and then subtracted from it by 0.5 after 3 minutes; when the instantaneous flow state of the material is a downward trend situation 2, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 2, and then subtracted from it by 0.5 after 40 seconds.

[0012] In particular, in step S9, when the instantaneous flow state of the material is in a stable trend, the frequency of the quantitative belt motor is not adjusted.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes automatic adjustment and control of the quantitative belt frequency by judging parameters such as the instantaneous flow rate of the electronic scale and the instantaneous flow state of the material, and ultimately improves the accuracy of process control and realizes automatic control of the feeding belt motor frequency without human intervention, and ensures that the instantaneous flow rate of the electronic scale is relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0015] Figure 1 This is a flow chart of a method for controlling the frequency of a feeding quantitative belt motor in cooperation with an electronic scale according to the present invention; Figure 2 A frequency algorithm diagram of a method for controlling the frequency of a feeding quantitative belt motor in cooperation with an electronic scale according to the present invention; Figure 3 This is a schematic diagram of a quantitative belt setting frequency curve when the rising trend situation 1 of a method for controlling the motor frequency of a feeding quantitative belt used in conjunction with an electronic scale according to the present invention.

[0016] Figure 4 It is a schematic diagram of a quantitative belt setting frequency curve in the rising trend situation 2 of a method for controlling the motor frequency of a feeding quantitative belt in cooperation with an electronic scale according to the present invention.

[0017] Figure 5 It is a schematic diagram of a quantitative belt setting frequency curve in the downward trend situation 1 of a method for controlling the motor frequency of a feeding quantitative belt in cooperation with an electronic scale of the present invention.

[0018] Figure 6 It is a schematic diagram of a quantitative belt setting frequency curve in the downward trend situation 2 of a method for controlling the motor frequency of a feeding quantitative belt in cooperation with an electronic scale of the present invention. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment 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.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figure 1 As shown, the present invention provides a method for controlling the frequency of a feeding quantitative 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 in step S1 is smaller than the set value, the instantaneous flow rate state of the electronic scale is obtained; S3. Record the duration of the instantaneous flow state of the electronic scale in step S2; S4. Determine the trigger state of the low-level photoelectric tube, the trigger state of the low-level photoelectric tube includes: triggered, not triggered; S5. Record the duration of the trigger state of the low-level photoelectric tube in step S3; S6. Determine the trigger state of the material level photoelectric tube, the trigger state of the material level photoelectric tube is triggered; S7. Record the duration of the trigger state of the material level photoelectric tube in step S5; S8. Determine the instantaneous flow state of the material according to the parameters of steps S2-S7; S9. Adjust the frequency of the quantitative belt motor according to the instantaneous flow state of the material in step S8.

[0023] The instantaneous flow state of the material in step S8 includes: an upward trend, a downward trend, and a stable trend.

[0024] The rising trend of the instantaneous flow state of the material includes rising trend situation 1 and rising trend situation 2; the rising trend situation 1: when the trigger state of the middle material level photoelectric tube is triggered, and the duration of this state is greater than 3 seconds; the rising trend situation 2: when the trigger state of the low material level photoelectric tube is triggered, and the duration of this state is greater than 5 minutes.

[0025] The downward trend of the instantaneous flow state 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 photoelectric tube 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 state of the electronic scale is greater than 3 seconds.

[0026] The stable trend of the instantaneous flow state of the material includes stable trend situation 1 and stable trend situation 2; the stable trend situation 1 is: when the trigger state of the low material level photoelectric tube is not triggered, and the duration of this state is less than 4 minutes; the stable trend situation 2 is: when the trigger state of the low material level photoelectric tube is triggered, and the duration of this state is less than 5 minutes.

[0027] like Figure 2 As shown, the method for adjusting the frequency of the quantitative belt motor is: In step S9, when the material instantaneous flow state is in the upward trend situation 1, as Figure 3 As shown, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 2, and then added to 0.5 after 2 minutes, and then added to 1 after another minute. 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 rising trend situation 1, the relevant control of the rising trend situation 2 will be invalid for 5 minutes.

[0028] When the material instantaneous flow state is in the upward trend situation 2, such as Figure 4 As shown, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 0.5. In this case, the control is not repeated within 1 minute after the first intervention setting.

[0029] In step S9, when the instantaneous flow state of the material is in the downward trend situation 1, as Figure 5 As shown, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 0.5, and then subtracted by 0.5 after 3 minutes. In this case, the control is not repeated within 5 minutes after the first intervention setting; in addition, when the downward trend situation 2 intervenes, the relevant control of the downward trend situation 1 is invalid for 5 minutes.

[0030] When the material instantaneous flow state is in the downward trend situation 2, such as Figure 6 As shown, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 2, and then subtracted by 0.5 after 40 seconds. In this case, the control is not repeated within 5 minutes after the first intervention setting.

[0031] In step S9, when the instantaneous flow state of the material is in a stable trend, the frequency of the quantitative belt motor is not adjusted.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling the frequency of a feeding quantitative 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 in step S1 is smaller than the set value, the instantaneous flow rate state of the electronic scale is obtained; S3. Record the duration of the instantaneous flow state of the electronic scale in step S2; S4. Determine the trigger state of the low-level photoelectric tube, the trigger state of the low-level photoelectric tube includes: triggered, not triggered; S5. Record the duration of the trigger state of the low-level photoelectric tube in step S3; S6. Determine the trigger state of the material level photoelectric tube, the trigger state of the material level photoelectric tube is triggered; S7. Record the duration of the trigger state of the material level photoelectric tube in step S5; S8. Determine the instantaneous flow state of the material according to the parameters of steps S2-S7; S9. Adjust the frequency of the quantitative belt motor according to the instantaneous flow state of the material in step S8.

2. The method for controlling the frequency of a feeding quantitative belt motor in combination with an electronic scale according to claim 1, characterized in that: The instantaneous flow state of the material in step S8 includes: an upward trend, a downward trend, and a stable trend.

3. The method for controlling the frequency of a feeding quantitative belt motor in combination with an electronic scale according to claim 2, characterized in that: The rising trend of the instantaneous flow state of the material includes rising trend situation 1 and rising trend situation 2; the rising trend situation 1: when the trigger state of the middle material level photoelectric tube is triggered, and the duration of this state is greater than 3 seconds; the rising trend situation 2: when the trigger state of the low material level photoelectric tube is triggered, and the duration of this state is greater than 5 minutes.

4. The method for controlling the frequency of a feeding quantitative belt motor in combination with an electronic scale according to claim 2, characterized in that: The downward trend of the instantaneous flow state 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 photoelectric tube 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 state of the electronic scale is greater than 3 seconds.

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

6. The method for controlling the frequency of a feeding quantitative belt motor in combination with an electronic scale according to claim 3, characterized in that: In step S9, when the instantaneous flow state of the material is an upward trend situation 1, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 2, and then added to 0.5 after 2 minutes, and then added to 1 after another minute; when the instantaneous flow state of the material is an upward trend situation 2, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency minus 0.

5.

7. The method for controlling the frequency of a feeding quantitative belt motor in combination with an electronic scale according to claim 4, characterized in that: In step S9, when the instantaneous flow state of the material is a downward trend situation 1, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 0.5, and then subtracted from it after 3 minutes; when the instantaneous flow state of the material is a downward trend situation 2, the quantitative belt motor frequency is adjusted to the quantitative belt motor frequency plus 2, and then subtracted from it after 40 seconds. 0.

5.

8. The method for controlling the frequency of a feeding quantitative belt motor in conjunction with an electronic scale according to claim 5, characterized in that: In step S9, when the instantaneous flow state of the material is in a stable trend, the frequency of the quantitative belt motor is not adjusted.

Images