Feeding control method and system for a vacuum feeder

Abstract

The present invention relates to the technical field of feeding machine transportation, and particularly relates to a feeding and discharging control method and system for a vacuum feeding machine, including: obtaining a plurality of flow velocity data in the conveying pipeline of the vacuum feeding machine; obtaining a flow velocity state reference range according to the flow velocity data during each historical operation of the vacuum feeding machine; regularly adjusting the vacuum negative pressure at a preset period during the operation of the vacuum feeding machine; evaluating the material conveying state of the corresponding time period of the preset period according to the flow velocity data collected by each flow velocity sensor in the corresponding time period of the preset period; and adjusting the vacuum negative pressure of the vacuum feeding machine according to the degree of deviation of the material conveying state of the corresponding time period of the preset period from the flow velocity state reference range. By evaluating the material conveying state based on the flow velocity data during the operation of the vacuum feeding machine, the present invention adjusts the vacuum negative pressure of the vacuum feeding machine, so as to keep the material in the best conveying state during the conveying process.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding machine transportation, and particularly relates to a feeding and discharging control method and system for a vacuum feeding machine. Background Art

[0002] As an efficient material conveying equipment, the vacuum feeding machine is widely used in industries such as chemical industry, food, medicine, plastics, etc. It conveys materials from one place to another through vacuum negative pressure, and has the advantages of high automation degree, good hygiene, high conveying efficiency, etc. When conveying materials through a vacuum feeding machine, in order to prevent material accumulation and blockage and improve the material conveying efficiency, the vacuum negative pressure of the vacuum feeding machine is adjusted so that the materials are always in the best conveying state during the conveying process. However, the traditional feeding and discharging control method of the vacuum feeding machine does not adjust the vacuum negative pressure of the feeding machine according to the material transmission situation, and cannot make the materials always in the best conveying state during the conveying process. Summary of the Invention

[0003] The present invention provides a feeding and discharging control method and system for a vacuum feeding machine to solve the existing problem that the traditional feeding and discharging control method of the vacuum feeding machine cannot make the materials always in the best conveying state during the conveying process.

[0004] The feeding and discharging control method and system for a vacuum feeding machine of the present invention adopt the following technical solutions:

[0005] An embodiment of the present invention provides a feeding and discharging control method for a vacuum feeding machine, and the method includes the following steps:

[0006] Obtain a plurality of flow velocity data in the conveying pipeline of the vacuum feeding machine;

[0007] Obtain a flow velocity state reference range according to the flow velocity data during each historical operation of the vacuum feeding machine;

[0008] During the operation of the vacuum feeding machine, regularly adjust the vacuum negative pressure according to a preset period; obtain the flow velocity stability at the corresponding positions of each flow velocity sensor according to the flow velocity data collected by each flow velocity sensor during the corresponding time period of the preset period; obtain the evaluation weight of each flow velocity sensor during the corresponding time period of the preset period according to the difference in flow velocity stability at the corresponding positions of adjacent flow velocity sensors during the corresponding time period of the preset period; evaluate the material conveying state during the corresponding time period of the preset period according to the evaluation weights of all flow velocity sensors and all flow velocity data during the corresponding time period of the preset period;

[0009] Obtain the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure according to the material conveying state and the flow velocity state reference range during the corresponding time period of the preset period; adjust the vacuum negative pressure according to the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure.

[0010] Preferably, the method for obtaining the reference range of the flow rate state according to the flow rate data during each historical operation of the vacuum feeding machine includes the following specific steps:

[0011] Preset a historical reference range , and record the most recent operations of the vacuum feeding machine as historical operations;

[0012] For the th historical operation, according to the flow rate data collected by each flow rate sensor during the th historical operation, obtain the flow rate difference in the conveying pipeline during the th historical operation. The specific calculation formula is:

[0013]

[0014] In the formula, represents the flow rate difference in the conveying pipeline during the th historical operation; represents the number of flow rate sensors; represents the average value of all flow rate data collected by the th flow rate sensor in the conveying pipeline during the th historical operation; represents the average value of all flow rate data collected by the th flow rate sensor in the conveying pipeline during the th historical operation; represents the absolute value function;

[0015] Obtain the reference range of the flow rate state according to the flow rate differences in the conveying pipeline during all historical operations.

[0016] Preferably, the method for obtaining the reference range of the flow rate state according to the flow rate differences in the conveying pipeline during all historical operations includes the following specific steps:

[0017] Record the maximum and minimum values of the flow rate differences in the conveying pipeline during all historical operations as the upper limit and lower limit of the flow rate difference respectively, and take the range from the lower limit to the upper limit of the flow rate difference as the reference range of the flow rate state.

[0018] Preferably, the method for regularly adjusting the vacuum negative pressure at preset intervals during the operation of the vacuum feeding machine includes the following specific steps:

[0019] Preset a vacuum negative pressure adjustment period , and adjust the vacuum negative pressure every minutes during the operation of the vacuum feeding machine.

[0020] Preferably, the method for obtaining the flow velocity stability at the corresponding positions of each flow velocity sensor in the corresponding time period of the preset cycle according to the flow velocity data collected by each flow velocity sensor in the corresponding time period of the preset cycle includes the following specific steps:

[0021] For the th adjustment of the vacuum negative pressure, the time period from the th to the th adjustment of the vacuum negative pressure is used as the reference time period for the th adjustment of the vacuum negative pressure; for each flow velocity sensor, the standard deviation of all the flow velocity data collected during the reference time period of the th adjustment of the vacuum negative pressure is linearly normalized, and 1 minus the normalized result is used as the flow velocity stability at the corresponding position of each flow velocity sensor during the reference time period of the th adjustment of the vacuum negative pressure.

[0022] Preferably, the method for obtaining the evaluation weight of each flow velocity sensor in the corresponding time period of the preset cycle according to the difference in the flow velocity stability at the corresponding positions of adjacent flow velocity sensors in the corresponding time period of the preset cycle includes the following specific steps:

[0023] For the rd flow velocity sensor during the reference time period of the th adjustment of the vacuum negative pressure, the absolute value of the difference in the flow velocity stability at the corresponding positions of the th and the th flow velocity sensors during the reference time period of the th adjustment of the vacuum negative pressure is weight-normalized, and the normalized result is used as the evaluation weight of the rd flow velocity sensor during the reference time period of the th adjustment of the vacuum negative pressure.

[0024] Preferably, the method for evaluating the material conveying state in the corresponding time period of the preset cycle according to the evaluation weights of all the flow velocity sensors and all the flow velocity data in the corresponding time period of the preset cycle includes the following specific steps:

[0025] For the th adjustment of the vacuum negative pressure, based on the evaluation weights of all the flow velocity sensors during the reference time period of the th adjustment of the vacuum negative pressure, combined with all the flow velocity data collected by each flow velocity sensor during the reference time period of the th adjustment of the vacuum negative pressure, the material conveying state during the reference time period of the th adjustment of the vacuum negative pressure is obtained. The specific calculation formula is:

[0026]

[0027] In the formula, Indicates the material conveying state during the reference time period for the th adjustment of the vacuum negative pressure; Indicates the number of flow rate sensors; Indicates the th adjustment of the vacuum negative pressure, and the evaluation weight of the th flow rate sensor in the reference time period; Indicates the th adjustment of the vacuum negative pressure, and the mean value of all flow rate data collected by the th flow rate sensor in the reference time period; Indicates the th adjustment of the vacuum negative pressure, and the mean value of all flow rate data collected by the th flow rate sensor in the reference time period; Indicates the absolute value function.

[0028] Preferably, the method for obtaining the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure according to the material conveying state and the flow rate state reference range corresponding to the preset period includes the following specific steps:

[0029] If the material conveying state during the reference time period for the th adjustment of the vacuum negative pressure is outside the flow rate state reference range, based on the material conveying state during the reference time period for the th adjustment of the vacuum negative pressure, combined with the upper limit of the flow rate difference and the lower limit of the flow rate difference, obtain the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the th time. The specific calculation formula is as follows:

[0030]

[0031] In the formula, Indicates the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the th time; Indicates the material conveying state during the reference time period for the th adjustment of the vacuum negative pressure; Indicates the upper limit of the flow rate difference; Indicates the lower limit of the flow rate difference; Indicates the absolute value function; Indicates the minimum value function; Indicates the sigmoid function.

[0032] Preferably, the method for adjusting the vacuum negative pressure according to the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure includes the following specific steps:

[0033] For the th adjustment of the vacuum negative pressure, based on the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the th time, combined with the The vacuum negative pressure during the -th adjustment of the vacuum negative pressure is obtained, and the specific calculation formula is:

[0034]

[0035] In the formula, represents the vacuum negative pressure during the -th adjustment of the vacuum negative pressure; represents the vacuum negative pressure during the -th adjustment of the vacuum negative pressure; represents the adjustment range of the vacuum negative pressure of the vacuum feeding machine; represents the deviation degree of the vacuum negative pressure during the -th adjustment of the vacuum negative pressure.

[0036] Another embodiment of the present invention provides a loading and unloading control system for a vacuum feeding machine, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of any one of the above-mentioned loading and unloading control methods for a vacuum feeding machine are implemented.

[0037] The beneficial effects of the technical solution of the present invention are as follows: The present application uses the flow velocity data in the conveying pipeline during the operation of the vacuum feeding machine in history as a reference to evaluate the conveying state of the material in the pipeline; that is, through the flow velocity data in the conveying pipeline during the operation of the vacuum feeding machine in history, a flow velocity reference range is obtained as a reference basis for subsequent evaluation of the conveying state of the material in the pipeline. However, when material accumulation may occur in the conveying pipeline, the flow velocity at the material accumulation point will suddenly decrease in time series, resulting in a decrease in the uniformity of the flow velocity at its position, and there is a difference in the uniformity of the flow velocity between the accumulated position and the non-accumulated position. Therefore, in order to more accurately evaluate the conveying state of the material in the conveying pipeline of the vacuum feeding machine, according to the uniformity difference of the flow velocity data collected by different flow velocity sensors, the weight for evaluating the conveying state of the material is obtained, and then the conveying state of the material is accurately obtained. Finally, according to the degree of deviation of the conveying state of the material from the flow velocity state reference range in the reference time period for each adjustment of the vacuum negative pressure, the magnitude of each adjustment of the vacuum negative pressure is set, so that the material is always in the best conveying state during the conveying process as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 The flowchart of the steps of the loading and unloading control method of a vacuum feeding machine according to the present invention. Detailed implementation manners

[0040] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following combines the accompanying drawings and preferred embodiments to describe in detail the specific implementation manners, structures, features and effects of a loading and unloading control method and system of a vacuum feeding machine according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0042] The following specifically describes the specific solutions of a loading and unloading control method and system of a vacuum feeding machine provided by the present invention with reference to the accompanying drawings.

[0043] Please refer to Figure 1 , which shows the flowchart of the steps of a loading and unloading control method of a vacuum feeding machine provided by an embodiment of the present invention. The method includes the following steps:

[0044] Step S001: Obtain a plurality of flow velocity data in the conveying pipeline of the vacuum feeding machine.

[0045] It should be noted that the specific process of loading and unloading of the vacuum feeding machine is to provide negative pressure through a vacuum pump to form a vacuum pressure to complete the suction and transportation of materials. At the same time, when loading and unloading the vacuum feeding machine, if the vacuum negative pressure is too large, resulting in too fast a flow rate of the material in the pipeline, it will cause excessive friction between the material and the pipeline wall, aggravating equipment wear and increasing equipment maintenance costs. If the vacuum negative pressure is too small, resulting in too slow a flow rate of the material in the pipeline, it will increase the risk of material blockage in the pipeline. Therefore, in order to ensure that the material is always in the best conveying state during the conveying process, it is necessary to adjust the vacuum negative pressure of the vacuum feeding machine according to the flow rate of the material in the pipeline. For this purpose, it is first necessary to obtain the flow velocity data in the conveying pipeline when the vacuum feeding machine is running.

[0046] Specifically, install flow velocity sensors evenly in the conveying pipeline of the vacuum feeding machine. When the vacuum feeding machine runs each time, all flow velocity sensors are made to collect flow velocity data every seconds; the and are respectively the pre-installed number of flow velocity sensors and the preset sampling interval; and The specific value can be set according to the actual situation and is not strictly required in this embodiment. In this embodiment, and are taken as examples for description.

[0047] Step S002: Obtain the reference range of the flow rate state according to the flow rate data during each historical operation of the vacuum feeding machine.

[0048] It should be noted that, as a method for controlling the loading and unloading of a vacuum feeding machine in this embodiment, specifically, the conveying state of the material in the pipeline is evaluated by the flow rate of the material in the pipeline during the operation of the vacuum feeding machine, and the vacuum negative pressure of the vacuum feeding machine is adjusted accordingly, so that the material is always in the best conveying state during the conveying process; and in order to accurately evaluate the conveying state of the material in the pipeline, it is necessary to use the flow rate data in the conveying pipeline during the historical operation of the vacuum feeding machine as a reference to evaluate the conveying state of the material in the pipeline; that is, the reference range of the flow rate is obtained through the flow rate data in the conveying pipeline during the historical operation of the vacuum feeding machine and used as the reference basis for subsequent evaluation of the conveying state of the material in the pipeline.

[0049] Preferably, in a specific embodiment of the present invention, a historical reference range is preset, and the specific value can be set according to the actual situation and is not strictly required in this embodiment. In this embodiment, is taken as an example for description; the most recent operations of the vacuum feeding machine are recorded as historical operations;

[0050] For the th historical operation, according to the flow rate data collected by each flow rate sensor during the th historical operation, obtain the flow rate difference in the conveying pipeline during the th historical operation. The specific calculation formula is:

[0051]

[0052] In the formula, represents the flow rate difference in the conveying pipeline during the th historical operation; represents the number of flow rate sensors; represents the average value of all flow rate data collected by the th flow rate sensor in the conveying pipeline during the th historical operation; represents the average value of all flow rate data collected by the th flow rate sensor in the conveying pipeline during the th historical operation; represents the absolute value function.

[0053] It should be noted that the flow velocity difference in the conveying pipeline during historical operation represents the flow velocity difference at all positions in the conveying pipeline when the vacuum feeding machine was operating historically, that is, when the vacuum feeding machine was operating historically, the material was allowed to operate at this flow velocity state. Therefore, the flow velocity difference range can be set according to the flow velocity differences in the conveying pipeline during all historical operations.

[0054] Specifically, obtain the flow velocity differences in the conveying pipeline during all historical operations, record the maximum and minimum values among the flow velocity differences in the conveying pipeline during all historical operations as the upper limit and lower limit of the flow velocity difference respectively, and take the range from the lower limit of the flow velocity difference to the upper limit of the flow velocity difference as the reference range of the flow velocity state.

[0055] Thus, the upper limit of the flow velocity difference, the lower limit of the flow velocity difference, and the reference range of the flow velocity state are obtained.

[0056] Step S003: Regularly adjust the vacuum negative pressure at a preset period during the operation of the vacuum feeding machine; obtain the flow velocity stability at the corresponding positions of each flow velocity sensor during the corresponding time period of the preset period according to the flow velocity data collected by each flow velocity sensor during the corresponding time period of the preset period; obtain the evaluation weight of each flow velocity sensor during the corresponding time period of the preset period according to the flow velocity stability difference at the corresponding positions of adjacent flow velocity sensors during the corresponding time period of the preset period; evaluate the material conveying state during the corresponding time period of the preset period according to the evaluation weights of all flow velocity sensors and all flow velocity data during the corresponding time period of the preset period.

[0057] It should be noted that in order to keep the material in the best conveying state during the conveying process, in this embodiment, during the operation of the vacuum feeding machine, the conveying state of the material in the conveying pipeline during the operation of the vacuum feeding machine is evaluated at regular intervals, and the vacuum negative pressure is adjusted according to the evaluation result; however, when material accumulation may occur in the conveying pipeline, the flow velocity at the material accumulation point will suddenly decrease in time sequence, resulting in a decrease in the flow velocity uniformity at its position, and there is a difference in the flow velocity uniformity between it and the non-accumulation position. Therefore, in order to more accurately evaluate the conveying state of the material in the conveying pipeline during the operation of the vacuum feeding machine, the weight for evaluating the conveying state of the material is obtained according to the uniformity difference of the flow velocity data collected by different flow velocity sensors, and the flow velocity state is further obtained by combining the flow velocity data collected by all flow velocity sensors.

[0058] Preferably, in a specific embodiment of the present invention, a vacuum negative pressure adjustment period is preset , The specific value of which can be set according to the actual situation by itself, and this embodiment does not make a rigid requirement. In this embodiment, it is described with ; adjust the vacuum negative pressure every minutes during the operation of the vacuum feeding machine;

[0059] Further, for the th adjustment of the vacuum negative pressure, the time period from the th to the th adjustment of the vacuum negative pressure is taken as the reference time period for the th adjustment of the vacuum negative pressure; for each flow rate sensor, the standard deviation of all flow rate data collected during the reference time period for the th adjustment of the vacuum negative pressure is linearly normalized, and 1 minus the normalized result is taken as the flow rate stability at the corresponding position of each flow rate sensor during the reference time period for the th adjustment of the vacuum negative pressure. The specific calculation formula is as follows:

[0060]

[0061] In the formula, represents the flow rate stability at the corresponding position of the th flow rate sensor during the reference time period for the th adjustment of the vacuum negative pressure; represents the standard deviation of all flow rate data collected by the th flow rate sensor during the reference time period for the th adjustment of the vacuum negative pressure; represents the linear normalization function, and its normalization range is for all flow rate sensors during the reference time period for the th adjustment of the vacuum negative pressure .

[0062] It should be noted that when the standard deviation of all flow rate data collected by the flow rate sensor during the reference time period of the vacuum negative pressure is smaller, it indicates that the flow rate at the corresponding position of the sensor is more uniform during this period. And when the difference in flow rate stability between the sensor and the adjacent sensor at the corresponding position is larger during this period, it indicates that there is a greater possibility of material accumulation at the corresponding position of the sensor. Therefore, when evaluating the flow rate state by following up the flow rate data collected by all sensors later, a larger weight needs to be assigned to it; that is, according to the difference in flow rate stability between the sensor and the adjacent sensor at the corresponding position, the evaluation weight of the sensor is obtained.

[0063] Preferably, in a specific embodiment of the present invention, for the th flow rate sensor during the reference time period for the th adjustment of the vacuum negative pressure, the absolute value of the difference in flow rate stability at the corresponding position between the th and the th flow rate sensors during the reference time period for the th adjustment of the vacuum negative pressure is weight-normalized, and the normalized result is taken as during the reference time period for the th adjustment of the vacuum negative pressure The evaluation weight of a flow rate sensor, and its specific calculation formula is:

[0064]

[0065] In the formula, represents the evaluation weight of the th flow rate sensor in the reference time period of the th adjustment of the vacuum negative pressure; represents the flow rate stability at the position corresponding to the th flow rate sensor in the reference time period of the th adjustment of the vacuum negative pressure; represents the flow rate stability at the position corresponding to the th flow rate sensor in the reference time period of the th adjustment of the vacuum negative pressure; represents the absolute value function; represents the weight normalization function, and its normalization range is for all flow rate sensors in the reference time period of the .

[0066] It should be noted that when the difference in the flow rate stability between the th flow rate sensor and the adjacent flow rate sensor at the corresponding position in the reference time period of the th adjustment of the vacuum negative pressure is greater, it indicates that there is a greater possibility of material accumulation at the position corresponding to the th flow rate sensor in the reference time period of the th adjustment of the vacuum negative pressure. To accurately evaluate the material conveying state, a larger calculation weight needs to be assigned to it.

[0067] Specifically, for the th adjustment of the vacuum negative pressure, based on the evaluation weights of all flow rate sensors in the reference time period of the th adjustment of the vacuum negative pressure, combined with all the flow rate data collected by each flow rate sensor in the reference time period of the th adjustment of the vacuum negative pressure, the material conveying state of the reference time period of the th adjustment of the vacuum negative pressure is obtained, and its specific calculation formula is:

[0068]

[0069] In the formula, represents the material conveying state of the reference time period of the th adjustment of the vacuum negative pressure; represents the number of flow rate sensors; represents the The evaluation weight of the th flow rate sensor in the reference time period for adjusting the vacuum negative pressure; Denote the th reference time period for adjusting the vacuum negative pressure, and the mean value of all flow rate data collected by the th flow rate sensor; Denote the th reference time period for adjusting the vacuum negative pressure, and the mean value of all flow rate data collected by the th flow rate sensor; Denote the absolute value function.

[0070] It should be noted that Denote that under the reference time period for the th adjustment of the vacuum negative pressure, the flow rate difference in the conveying pipeline during the operation of the vacuum feeding machine corresponds to the flow rate difference in the conveying pipeline during historical operation in step S002; further, by giving a calculation weight to the situation of material accumulation at the corresponding positions of different flow rate sensors, the material conveying state can be accurately determined.

[0071] Thus, the material conveying state of the reference time period for each adjustment of the vacuum negative pressure is obtained.

[0072] Step S004: Obtain the deviation degree of the vacuum negative pressure when adjusting the vacuum negative pressure according to the material conveying state and the flow rate state reference range in the corresponding time period of the preset cycle; adjust the vacuum negative pressure according to the deviation degree of the vacuum negative pressure when adjusting the vacuum negative pressure.

[0073] It should be noted that after obtaining the upper limit of the flow rate difference, the lower limit of the flow rate difference, and the flow rate state reference range through step S002, and the material conveying state of the reference time period for each adjustment of the vacuum negative pressure through step S003, it can be determined whether to adjust the vacuum negative pressure according to whether the material conveying state of the reference time period for each adjustment of the vacuum negative pressure is within the flow rate state reference range. Further, according to the degree to which the material conveying state of the reference time period for each adjustment of the vacuum negative pressure deviates from the flow rate state reference range, the magnitude of each adjustment of the vacuum negative pressure is set to make the material always in the best conveying state during the conveying process as much as possible.

[0074] Preferably, in a specific embodiment of the present invention, for the th adjustment of the vacuum negative pressure, if the material conveying state in the reference time period for the th adjustment of the vacuum negative pressure is within the flow rate state reference range, keep the vacuum negative pressure unchanged;

[0075] If the material conveying state in the reference time period for the th adjustment of the vacuum negative pressure is outside the flow rate state reference range, according to the Adjust the material conveying state of the reference time period for vacuum negative pressure for the th time, and combine the upper limit and lower limit of the flow rate difference to obtain the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the

[0076]

[0077] In the formula, represents the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the th time; represents the material conveying state of the reference time period for vacuum negative pressure adjustment for the th time; represents the upper limit of the flow rate difference; represents the lower limit of the flow rate difference; represents the absolute value function; represents the minimum value function; represents the sigmoid function, which is used for normalization operation in this embodiment.

[0078] It should be noted that the larger the value of , the more the material conveying state of the reference time period for vacuum negative pressure adjustment for the

[0079] th time deviates from the reference range of the flow rate state, and the more the vacuum negative pressure needs to be adjusted to keep the material in the best conveying state during the conveying process. Furthermore, for the th adjustment of the vacuum negative pressure, based on the vacuum negative pressure deviation degree when adjusting the vacuum negative pressure for the th time, and combining the vacuum negative pressure when adjusting the vacuum negative pressure for the th time, obtain the vacuum negative pressure when adjusting the vacuum negative pressure for the

[0080]

[0081] In the formula, represents the vacuum negative pressure when adjusting the vacuum negative pressure for the th time; represents the vacuum negative pressure when adjusting the vacuum negative pressure for the th time; represents the vacuum negative pressure adjustment range of the vacuum feeding machine (the difference between the maximum vacuum negative pressure and the minimum vacuum negative pressure of the vacuum feeding machine); represents the th vacuum negative pressure deviation degree when adjusting the vacuum negative pressure.

[0082] It should be noted that in this embodiment, when the vacuum feeding machine is running, the conveying state of the material in the conveying pipeline during the operation of the vacuum feeding machine is evaluated at regular intervals. When evaluating the conveying state of the material in the conveying pipeline, the possibility of material accumulation at each position in the pipeline is further analyzed, so as to obtain the conveying state of the material more accurately with this weight. Finally, according to the degree to which the conveying state of the material deviates from the reference range obtained from historical data, the vacuum negative pressure of the vacuum feeding machine is adjusted, so that the material is always in the best conveying state during the conveying process.

[0083] Another embodiment of the present invention provides a loading and unloading control system for a vacuum feeding machine, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements a loading and unloading control method for a vacuum feeding machine in steps S001 to S004.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for controlling loading and unloading of a vacuum loading machine, characterized in that: The method comprises the following steps: Obtain some flow rate data in the conveying pipeline of the vacuum feeder; According to the flow rate data of each historical operation of the vacuum feeder, the reference range of the flow rate state is obtained; When the vacuum loader is running, the vacuum negative pressure is adjusted regularly according to the preset cycle; based on the flow rate data collected by each flow rate sensor in the time period corresponding to the preset cycle, the flow rate stability at the corresponding position of each flow rate sensor in the time period corresponding to the preset cycle is obtained; based on the difference in flow rate stability at the corresponding positions of adjacent flow rate sensors in the time period corresponding to the preset cycle, the evaluation weight of each flow rate sensor in the time period corresponding to the preset cycle is obtained; based on the evaluation weights of all flow rate sensors in the time period corresponding to the preset cycle and all flow rate data collected by each flow rate sensor in the time period corresponding to the preset cycle, the material conveying status of the time period corresponding to the preset cycle is evaluated; According to the reference range of the material conveying state and the flow rate state in the time period corresponding to the preset cycle, the vacuum negative pressure deviation when adjusting the vacuum negative pressure is obtained; according to the vacuum negative pressure deviation when adjusting the vacuum negative pressure, the vacuum negative pressure is adjusted.

2. A method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The specific method of obtaining the flow rate state reference range according to the flow rate data of each historical operation of the vacuum feeder includes: Preset a historical reference range , the most recent The vacuum loader operation is recorded as a historical operation; For The historical run, according to The flow rate data collected by each flow rate sensor during the historical operation is obtained. The specific calculation formula for the flow velocity difference in the transmission pipeline during the historical operation is: In the formula, Indicates Difference in flow velocity in the transmission pipeline during the historical operation; Indicates the number of flow rate sensors; Indicates The historical run time of the pipeline The mean value of all flow velocity data collected by flow velocity sensors; Indicates The historical run time of the pipeline The mean value of all flow velocity data collected by flow velocity sensors; It represents the absolute value function; The flow rate state reference range is obtained according to the flow rate differences in the transmission pipeline during all historical operations.

3. A method for controlling loading and unloading of a vacuum loading machine according to claim 2, characterized in that: The specific method of obtaining the flow velocity state reference range according to the flow velocity difference in the delivery pipeline during all historical operations is as follows: The maximum and minimum values ​​of the flow velocity differences in the delivery pipeline during all historical operations are recorded as the flow velocity difference upper limit and the flow velocity difference lower limit respectively, and the range from the flow velocity difference lower limit to the flow velocity difference upper limit is used as the flow velocity state reference range.

4. The method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The specific method of regularly adjusting the vacuum negative pressure according to a preset period when the vacuum feeder is running includes: Preset a vacuum negative pressure adjustment cycle , when the vacuum feeder is running, Adjust the vacuum pressure in minutes.

5. The method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The specific method of obtaining the flow velocity stability at the corresponding position of each flow velocity sensor in the corresponding time period of the preset cycle according to the flow velocity data collected by each flow velocity sensor in the corresponding time period of the preset cycle includes: For Adjust the vacuum pressure for the first time. From The time for adjusting the vacuum negative pressure is the first The reference time period for adjusting the vacuum negative pressure is the first time; for each flow rate sensor The standard deviation of all flow rate data collected during the reference time period of the first adjustment of the vacuum negative pressure is linearly normalized, and the normalized result is subtracted from 1 as the value of the first adjustment. The flow rate stability at the corresponding position of each flow rate sensor during the reference time period of adjusting the vacuum negative pressure.

6. The method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The method of obtaining the evaluation weight of each flow velocity sensor in the time period corresponding to the preset cycle according to the flow velocity stability difference at the corresponding positions of adjacent flow velocity sensors in the time period corresponding to the preset cycle includes the following specific methods: For The reference time period for adjusting the vacuum negative pressure for the first time A flow rate sensor, for the The reference time period for adjusting the vacuum negative pressure for the first time The first The absolute value of the difference in flow rate stability at the corresponding position is weighted normalized, and the normalized result is used as the first The reference time period for adjusting the vacuum negative pressure for the first time The evaluation weight of each flow sensor.

7. The method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The method of evaluating the material conveying state of the time period corresponding to the preset cycle according to the evaluation weights of all flow rate sensors in the time period corresponding to the preset cycle and all flow rate data collected by each flow rate sensor in the time period corresponding to the preset cycle includes: For Adjust the vacuum pressure for the second time, based on the The evaluation weights of all flow rate sensors in the reference time period of the first adjustment of vacuum negative pressure are combined with the All the flow rate data collected by each flow rate sensor during the reference time period of the first adjustment of the vacuum negative pressure are obtained. The material conveying state of the reference time period for adjusting the vacuum negative pressure is calculated as follows: In the formula, Indicates The material conveying status during the reference time period of adjusting the vacuum negative pressure; Indicates the number of flow rate sensors; Indicates The reference time period for adjusting the vacuum negative pressure for the first time The evaluation weight of each flow sensor; Indicates The reference time period for adjusting the vacuum negative pressure for the first time The mean value of all flow velocity data collected by flow velocity sensors; Indicates The reference time period for adjusting the vacuum negative pressure for the first time The mean value of all flow velocity data collected by flow velocity sensors; Represents the absolute value function.

8. The method for controlling loading and unloading of a vacuum loading machine according to claim 3, characterized in that: The specific method of obtaining the vacuum negative pressure deviation when adjusting the vacuum negative pressure according to the material conveying state and flow rate state reference range of the time period corresponding to the preset cycle includes: Jordi The material conveying state of the reference time period for adjusting the vacuum negative pressure for the first time is outside the reference range of the flow rate state. The material conveying state of the reference time period of the vacuum negative pressure is adjusted for the first time, and the upper limit of the flow rate difference and the lower limit of the flow rate difference are combined to obtain the material conveying state of the reference time period of the vacuum negative pressure. The specific calculation formula for the vacuum negative pressure deviation when adjusting the vacuum negative pressure for the first time is: In the formula, Indicates The vacuum pressure deviation when adjusting the vacuum pressure for the first time; Indicates The material conveying status during the reference time period of adjusting the vacuum negative pressure; Indicates the upper limit of flow rate difference; Indicates the lower limit of flow rate difference; It represents the absolute value function; Represents the minimum value function; Represents the sigmoid function.

9. A method for controlling loading and unloading of a vacuum loading machine according to claim 1, characterized in that: The specific method of adjusting the vacuum negative pressure according to the vacuum negative pressure deviation when adjusting the vacuum negative pressure is as follows: For Adjust the vacuum pressure according to the The vacuum pressure deviation during the first adjustment of the vacuum pressure is combined with the The vacuum pressure when adjusting the vacuum pressure for the first time is obtained. The specific calculation formula for the vacuum negative pressure when adjusting the vacuum negative pressure for the first time is: In the formula, Indicates The vacuum pressure when the vacuum pressure is adjusted for the first time; Indicates The vacuum pressure when the vacuum pressure is adjusted for the first time; Indicates the vacuum negative pressure adjustment range of the vacuum loader; Indicates The vacuum pressure deviation when adjusting the vacuum pressure for the first time.

10. A loading and unloading control system for a vacuum loading machine, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by the processor, the steps of the loading and unloading control method of a vacuum loader are implemented.

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