Discharge flow control method and apparatus

Abstract

The embodiment of the application discloses a discharging flow control method and device. The method is applied to a tobacco making system, and the tobacco making system comprises a flow sensor, a discharging conveying belt, a pre-cutting feeder connected with the discharging conveying belt, a material dropping device connected with the pre-cutting feeder, and a tobacco cutting machine connected with the material dropping device. The discharging conveying belt is used for conveying tobacco in at least one tobacco storage cabinet to the pre-cutting feeder. The pre-cutting feeder comprises a first material bin, and the flow sensor is used for detecting the flow of the tobacco conveyed on the discharging conveying belt. The method comprises the following steps: obtaining current discharging data sent by the flow sensor; determining actual temporary storage tobacco data of the material dropping device based on the current discharging data; determining a first data deviation between the actual temporary storage tobacco data of the material dropping device and preset target temporary storage tobacco data, generating a first control instruction based on the first data deviation, and sending the first control instruction to a conveying belt motor, so that the conveying belt motor adjusts the discharging flow of the discharging conveying belt.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of discharge flow control, in particular to a discharge flow control method and device. BACKGROUND

[0002] In the cigarette production process, cutting tobacco is one of the key processes in the tobacco production line. The flow control before and after cutting tobacco is crucial to ensure the stable operation of the subsequent processes.

[0003] In the prior art, the set discharge flow of the discharge conveyor belt on the tobacco production line is often determined based on manual experience, so as to control the discharge conveyor belt to convey tobacco leaves to the drop feeder according to the set discharge flow. However, in the process of implementing the present application, it is found that the prior art at least has the following technical problems: the set discharge flow determined based on manual experience has poor accuracy, the discharge flow does not match the cutting flow of the cutting machine, and the cutting machine is prone to stop or the drop feeder is prone to be full, so that the stability and reliability of the equipment are poor. SUMMARY

[0004] The embodiment of the present application provides a discharge flow control method and device to make the accuracy of the set discharge flow higher; at the same time, avoid the cutting machine stopping or the drop feeder being full, and achieve the purpose of improving the stability and reliability of each device in the tobacco production system.

[0005] According to an aspect of the present application, a discharge flow control method is provided, which is applied to a tobacco production system, the tobacco production system comprising a flow sensor, a discharge conveyor belt, a pre-cutting feeding machine connected with the discharge conveyor belt, a drop feeder connected with the pre-cutting feeding machine, and a cutting machine connected with the drop feeder; the discharge conveyor belt is used to convey tobacco leaves in at least one tobacco storage cabinet to the pre-cutting feeding machine, the pre-cutting feeding machine comprises a first bin, and the flow sensor is used to detect the flow of tobacco leaves conveyed on the discharge conveyor belt; the method comprises:

[0006] obtaining current discharge data sent by the flow sensor; wherein the current discharge data comprises the flow of tobacco leaves conveyed on the discharge conveyor belt corresponding to a current time period;

[0007] determining actual temporary storage tobacco data of the drop feeder based on the current discharge data;

[0008] determining a first data deviation between the actual temporary storage tobacco data of the drop feeder and preset target temporary storage tobacco data, generating a first control instruction based on the first data deviation, and sending the first control instruction to a conveyor belt motor, so that the conveyor belt motor adjusts the discharge flow of the discharge conveyor belt.

[0009] According to another aspect of the present application, there is provided a discharge flow control device, which is arranged in a tobacco manufacturing system, the tobacco manufacturing system comprising a flow sensor, a discharge conveyor belt, a pre-cutting feeder connected with the discharge conveyor belt, a hopper connected with the pre-cutting feeder, and a cutting machine connected with the hopper; the discharge conveyor belt is used to convey tobacco in at least one tobacco storage cabinet to the pre-cutting feeder, the pre-cutting feeder comprises a first hopper, and the flow sensor is used to detect the flow of tobacco conveyed on the discharge conveyor belt; the device comprises:

[0010] a current discharge data acquisition module, which is used to acquire current discharge data sent by the flow sensor; wherein the current discharge data comprises the flow of tobacco conveyed on the discharge conveyor belt corresponding to a current time period;

[0011] a data determination module, which is used to determine actual temporary storage tobacco data of the hopper based on the current discharge data;

[0012] an instruction generation module, which is used to determine a first data deviation between the actual temporary storage tobacco data of the hopper and preset target temporary storage tobacco data, generate a first control instruction based on the first data deviation, and send the first control instruction to a conveyor belt motor, so as to make the conveyor belt motor adjust the discharge flow of the discharge conveyor belt.

[0013] The technical scheme of the embodiment of the present application is applied to a tobacco manufacturing system, the tobacco manufacturing system comprising a flow sensor, a discharge conveyor belt, a pre-cutting feeder connected with the discharge conveyor belt, a hopper connected with the pre-cutting feeder, and a cutting machine connected with the hopper; the discharge conveyor belt is used to convey tobacco in at least one tobacco storage cabinet to the pre-cutting feeder, the pre-cutting feeder comprises a first hopper, and the flow sensor is used to detect the flow of tobacco conveyed on the discharge conveyor belt; by acquiring current discharge data sent by the flow sensor, actual temporary storage tobacco data of the hopper is determined, a first data deviation between the actual temporary storage tobacco data of the hopper and preset target temporary storage tobacco data is determined, a first control instruction is generated based on the first data deviation, and the first control instruction is sent to a conveyor belt motor, so as to make the conveyor belt motor adjust the discharge flow of the discharge conveyor belt; the technical scheme of the embodiment of the present application does not need to rely on manual experience, controls the discharge conveyor belt based on the first data deviation, and makes the set discharge flow more accurate; at the same time, the situation that the cutting machine stops or the hopper is full is avoided, which is beneficial to the stability and reliability of each device in the tobacco manufacturing system.

[0014] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] Figure 1 is a flow chart of a discharging flow control method according to an embodiment of the present application;

[0017] Figure 2 is a structural schematic diagram of a tobacco making system according to an embodiment of the present application;

[0018] Figure 3 is a flow chart of another discharging flow control method according to an embodiment of the present application;

[0019] Figure 4 is a structural schematic diagram of a discharging flow control device according to an embodiment of the present application;

[0020] Figure 5 is a structural schematic diagram of an electronic device for implementing the discharging flow control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily mean a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "etc." and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] It should be noted that in the technical solutions of the present disclosure, the collection, collection, updating, analysis, processing, use, transmission, storage and the like of user personal information comply with relevant laws and regulations, are used for legal purposes, and do not violate public order and good customs. Necessary measures are taken for user personal information to prevent illegal access to user personal information data and to maintain user personal information security and network security.

[0024] Figure 1 A flowchart of a discharging flow control method according to an embodiment of the present application is shown. The present embodiment can be applied to the case of controlling the tobacco leaf flow conveyed by the discharging conveyor belt in a tobacco making system. The method can be executed by a discharging flow control device, which can be implemented in the form of hardware and / or software.

[0025] As shown in Figure 1 , the method of the present embodiment can specifically include:

[0026] S110, obtaining current discharging data sent by the flow sensor.

[0027] It should be noted that the discharging flow control method is applied to a tobacco making system. Figure 2 A structural diagram of a tobacco making system according to an embodiment of the present application is shown. As shown in Figure 2 , the tobacco making system includes a flow sensor, a discharging conveyor belt, a pre-cutting feeder connected to the discharging conveyor belt, a drop feeder connected to the pre-cutting feeder, and a cutting machine connected to the drop feeder. The discharging conveyor belt is used to convey tobacco leaves in at least one tobacco leaf storage cabinet to the pre-cutting feeder, and the pre-cutting feeder includes a first hopper. The tobacco making system further includes a pre-drying feeder, an electronic belt scale, and a drying machine.

[0028] The flow sensor is used to detect the tobacco flow conveyed on the discharging conveyor belt. The flow sensor can be installed on a bracket above the discharging conveyor belt. The flow sensor can be a three-dimensional visual volumetric flow sensor. Through the three-dimensional visual volumetric flow sensor, the tobacco volumetric flow conveyed on the discharging conveyor belt can be detected. The unit of the tobacco volumetric flow is cubic meters per hour.

[0029] In the present embodiment, the process of tobacco processing includes: each tobacco leaf storage cabinet is used to store tobacco leaves with cut tobacco, the discharging conveyor belt is connected to at least one tobacco leaf storage cabinet, and the tobacco leaves in the tobacco leaf storage cabinet are conveyed to the first hopper of the pre-cutting feeder. The pre-cutting feeder is connected to the drop feeder, and after processing the tobacco leaves in the first hopper, the processed tobacco leaves are conveyed to the drop feeder. The drop feeder includes a lifting belt, the tobacco leaves are conveyed to the cutting machine through the lifting belt, the tobacco leaves are cut by the cutting machine, and the cut tobacco is conveyed to the pre-drying feeder. The tobacco processed by the pre-drying feeder is conveyed to the electronic belt scale, and the tobacco is conveyed to the drying machine by the electronic belt scale.

[0030] In practical implementation, the flow sensor can detect the flow rate of tobacco leaves transported on the discharge conveyor belt in real time. The current discharge data is composed of the tobacco leaf flow rate collected in the current time period. The controller can acquire the current discharge data sent by the flow sensor. The current discharge data includes the flow rate of tobacco leaves transported on the discharge conveyor belt corresponding to the current time period. The tobacco leaf flow rate can be a volumetric flow rate. The controller and the flow sensor can communicate based on the automation bus standard using Ethernet technology.

[0031] It should be noted that the flow rate data of the tobacco leaves transported by the discharge conveyor belt can be periodically acquired from the flow sensor until the shredder stops shredding. The current time period is the most recent acquisition period; alternatively, the current time period can be a time period preset from the current time. The preset time period can be 30 seconds, one minute, half an hour, or one hour.

[0032] S120. Based on the current discharge data, determine the actual temporary tobacco leaf data of the feeder.

[0033] The actual temporary tobacco leaf data refers to the tobacco leaf information stored by the feeder at the current moment; the tobacco leaf information includes the tobacco leaf volume and / or weight.

[0034] In this embodiment, the actual temporary tobacco leaf data stored in the feeder can be determined based on the working status of the shredder. Specifically, when the shredder is not working, the start time of the current time period and the original weight of the tobacco leaves in the feeder can be determined; based on the current output data, the newly added weight of the tobacco leaves entering the feeder during the current time period can be determined, and the sum of the original weight of the tobacco leaves and the newly added weight of the tobacco leaves is used as the actual temporary tobacco leaf data stored in the feeder.

[0035] When the shredder is operating, determining the actual temporary tobacco leaf data stored in the feeder requires considering the tobacco leaf data processed by the shredder. Optionally, the specific implementation method for determining the actual temporary tobacco leaf data stored in the feeder based on the current output data includes: determining the cumulative shredding weight of the shredder in the current time period based on the shredder's preset shredding flow rate; determining the cumulative transport weight of the discharge conveyor belt in the current time period based on the current output data; determining the weight difference between the cumulative transport weight and the cumulative shredding weight, and determining the actual temporary tobacco leaf data stored in the feeder based on the weight difference.

[0036] The preset shredding flow rate is the shredding flow rate set for the shredder, which is the amount of tobacco shreds cut and processed per unit time. The amount of tobacco shreds can be in terms of volume or weight.

[0037] In specific implementation, the preset tobacco shred flow corresponding to each unit time within the current time period can be acquired. When the tobacco shred amount reflected by the preset tobacco shred flow is volume, the density of the tobacco leaves being conveyed can be determined based on the tobacco leaf attribute of the conveyed tobacco leaves. The product of the preset tobacco shred flow corresponding to each unit time and the density is determined as the tobacco shred weight flow of the unit time. The tobacco shred weight flow of each unit time corresponding to the current time period is integrated to obtain the tobacco shred cumulative weight. When the tobacco shred amount reflected by the preset tobacco shred flow is weight, the preset tobacco shred flow of each unit time corresponding to the current time can be directly integrated to obtain the tobacco shred cumulative weight.

[0038] Further, when the tobacco leaf flow in the current discharge data reflects the volume of tobacco leaves, the discharge weight flow corresponding to the current time period can be determined based on the density of the tobacco leaves. The discharge weight flow of each unit time corresponding to the current time period is integrated to obtain the conveying cumulative weight. When the tobacco leaf flow in the current discharge data reflects the weight of tobacco leaves, the tobacco leaf flow of each unit time corresponding to the current time period can be directly integrated to obtain the conveying cumulative weight. In specific implementation, if the amount of tobacco leaves in the hopper is 0 at the starting moment of the current time period, the weight difference between the conveying cumulative weight and the tobacco shred cumulative weight can be taken as the actual temporary storage tobacco data of the hopper. If the amount of tobacco leaves in the hopper is not 0 at the starting moment of the current time period, the sum of the weight difference and the existing amount of tobacco leaves can be taken as the actual temporary storage tobacco data.

[0039] In the embodiment, the actual temporary storage tobacco data is accurately determined by considering the input tobacco leaves, the output tobacco leaves of the hopper in the current time period and the existing amount of tobacco leaves at the starting moment.

[0040] S130, a first data deviation between the actual temporary storage tobacco data of the hopper and the preset target temporary storage tobacco data is determined, a first control instruction is generated based on the first data deviation, and the first control instruction is sent to the conveyor belt motor to enable the conveyor belt motor to adjust the discharge flow of the discharge conveyor belt.

[0041] It should be noted that, in order to control the amount of tobacco leaves in the hopper from overflowing or to avoid the case that the amount of tobacco leaves is too small to cause low space utilization of the hopper, the target temporary storage tobacco data of the hopper can be preset so as to fully utilize the available space of the hopper and avoid the overflow of tobacco leaves as much as possible. The target temporary storage tobacco data can be set by the person skilled in the art according to the actual volume of the hopper.

[0042] In specific embodiments, the actual temporary storage tobacco data is actual temporary storage tobacco weight, the target temporary storage tobacco data is target temporary storage tobacco weight, the actual temporary storage tobacco weight is subtracted by the target temporary storage tobacco weight to obtain a weight difference, and the weight difference is taken as the first data deviation. Based on the first data deviation, the first control instruction can be generated. For example, if the first data deviation is positive, it means that the actual temporary storage tobacco weight is heavier than the target temporary storage tobacco weight, and then the first control instruction for reducing the conveying speed of the discharging conveyor belt can be generated. The first control instruction is sent to the conveyor belt motor, and the conveying speed of the discharging conveyor belt is reduced by adjusting the motor frequency of the conveyor belt motor. If the first data deviation is negative, it means that the actual temporary storage tobacco weight is lighter than the target temporary storage tobacco weight, and then the second control instruction for increasing the conveying speed of the discharging conveyor belt can be generated. The second control instruction is sent to the conveyor belt motor, and the conveying speed of the discharging conveyor belt is increased by adjusting the motor frequency of the conveyor belt motor, so that the weight difference between the actual temporary storage tobacco weight and the target temporary storage tobacco weight in the next time period is less than the weight difference between the actual temporary storage tobacco weight and the target temporary storage tobacco weight in the current time period.

[0043] Optionally, the first control instruction is generated based on the first data deviation, including: determining the product between the actual temporary storage tobacco data and a preset multiple as a discharging flow correction coefficient; determining the target discharging flow of the discharging conveyor belt based on the discharging flow correction coefficient, determining the target running frequency of the conveyor belt motor based on the target discharging flow, and generating the first control instruction based on the target running frequency.

[0044] For example, the preset multiple can be 0.02.

[0045] In specific embodiments, the determination of the target discharging flow of the discharging conveyor belt based on the discharging flow correction coefficient includes:

[0046] Q1=Q2×(1+K1)

[0047] Wherein, Q1 is the target discharging flow, Q2 is the preset cutting flow, and K1 is the discharging flow correction coefficient.

[0048] Further, the product between the target discharging flow and a preset bottom belt frequency correction coefficient can be taken as the target running frequency. Through the first control instruction, the running frequency of the conveyor belt motor can be set to the target running frequency, so that the conveyor belt motor works according to the target running frequency, and the weight difference between the actual temporary storage tobacco weight and the target temporary storage tobacco weight in the next time period is minimized. It should be noted that the bottom belt frequency correction coefficient can be set by the person skilled in the art according to the actual application situation; for example, the bottom belt frequency correction coefficient can be set based on the information of the material, thickness, tension and load of the discharging conveyor belt. The bottom belt frequency correction coefficient can be 0.24.

[0049] In the embodiment, the tobacco flow data obtained in each period is used to periodically adjust the discharge flow of the discharge conveyor belt until the cutter stops cutting.

[0050] In the embodiment, a method for generating the first control instruction is provided, which combines the bottom band frequency correction coefficient and the target discharge flow, so as to effectively control the discharge conveyor belt and avoid the overflow of tobacco in the discharger or the low space occupancy.

[0051] In the embodiment, the tobacco production system further comprises at least one first photoelectric tube, the discharge conveyor belt is connected with the first silo, and the first photoelectric tube is installed at a first preset height of a silo wall of the first silo. The first control instruction is generated based on the target running frequency, including: determining whether the tobacco height of the stored tobacco in the first silo exceeds the first preset height based on the electrical signal sent by the first photoelectric tube; if yes, updating the target running frequency based on the first preset frequency supplement, and generating the first control instruction based on the updated target running frequency.

[0052] In specific implementation, the electrical signal sent by the first photoelectric tube can be obtained, and the first photoelectric tube generates different electrical signals in the two cases of being blocked by tobacco and not being blocked. Therefore, whether the tobacco height of the stored tobacco in the first silo exceeds the first preset height can be determined based on the electrical signal generated by the first photoelectric tube located at the first preset height.

[0053] It should be noted that, since the discharge conveyor belt is connected with the discharger through the first silo, the change of the target discharge flow will cause the change of the tobacco silo flow in the first silo. In order to avoid the stored tobacco in the first silo exceeding the capacity of the first silo, the tobacco height of the stored tobacco can be detected.

[0054] Specifically, the first preset height can be set as the top position of the first silo, or the first preset height is set as a position with a distance less than a preset distance from the top position of the first silo. When the tobacco height of the stored tobacco exceeds the first preset height, it indicates that the first silo is in a full-silo state; otherwise, when the first preset height does not exceed the first preset height, it indicates that the first silo can continue to store tobacco.

[0055] Further, when the tobacco height of the stored tobacco in the first silo exceeds the first preset height, the frequency difference between the target running frequency and the first preset frequency supplement can be determined, the frequency difference is updated as the target running frequency, and the first control instruction is generated based on the updated target running frequency. When the tobacco height of the stored tobacco in the first silo does not exceed the first preset height, the first control instruction can be generated according to the current target running frequency. For example, the first preset frequency supplement can be 0.05 Hz.

[0056] The embodiment considers the storage condition of the tobacco leaves in the first silo before generating the first control instruction, in order to avoid the overflow of the tobacco leaves in the first silo, determines whether the target running frequency needs to be updated based on the tobacco leaf height of the stored tobacco leaves, and ensures the safety and stability of the tobacco making process.

[0057] The technical scheme of the embodiment of the application is applied to a tobacco making system, and the tobacco making system comprises a flow sensor, a discharge conveying belt, a pre-cutting feeder connected with the discharge conveying belt, a drop feeder connected with the pre-cutting feeder, and a cutting machine connected with the drop feeder; the discharge conveying belt is used for conveying the tobacco leaves in at least one tobacco leaf storage cabinet to the pre-cutting feeder, the pre-cutting feeder comprises a first silo, and the flow sensor is used for detecting the flow of the tobacco leaves conveyed on the discharge conveying belt; the actual temporary storage tobacco leaf data of the drop feeder is determined by acquiring the current discharge data sent by the flow sensor, the first data deviation between the actual temporary storage tobacco leaf data of the drop feeder and the preset target temporary storage tobacco leaf data is determined, the first control instruction is generated based on the first data deviation, and the first control instruction is sent to the conveying belt motor, so that the discharge conveying belt motor adjusts the discharge flow of the discharge conveying belt; the technical scheme of the embodiment does not need to rely on manual experience, controls the discharge conveying belt based on the first data deviation, and makes the set discharge flow more accurate; meanwhile, the situation that the cutting machine is stopped or the drop feeder is full is avoided, which is beneficial to the stability and reliability of each device in the tobacco making system.

[0058] Figure 3 is a flow chart of another discharge flow control method provided by the embodiment of the application. Based on the above-mentioned embodiments, the embodiment further comprises: determining the height comparison result between the tobacco leaf height of the tobacco leaves that have fallen into the drop feeder and the second preset height based on the electric signal sent by the second photoelectric tube; determining the target motor frequency of the lifting belt motor based on the height comparison result, the current motor frequency of the lifting belt motor, and the second preset frequency supplement; and generating the second control instruction based on the target motor frequency and sending the second control instruction to the lifting belt motor. Wherein, the explanations of the same or corresponding terms as those in the above-mentioned embodiments are not repeated here. As shown in Figure 3 The method comprises:

[0059] S210, acquiring the current discharge data sent by the flow sensor.

[0060] S220, determining the actual temporary storage tobacco leaf data of the drop feeder based on the current discharge data.

[0061] S230, determining the first data deviation between the actual temporary storage tobacco leaf data of the drop feeder and the preset target temporary storage tobacco leaf data, generating the first control instruction based on the first data deviation, and sending the first control instruction to the conveying belt motor, so that the conveying belt motor adjusts the discharge flow of the discharge conveying belt.

[0062] In the embodiment, the pre-cut feeding machine further comprises a lifting belt for connecting the first hopper and the drop feeder, and the tobacco making system further comprises a lifting belt motor and at least one second photoelectric tube installed at the second preset height of the structural wall of the drop feeder. The lifting belt transports the tobacco leaves in the first hopper to the drop feeder. The first photoelectric tube and the second photoelectric tube can be a pair of photoelectric tubes, and the output is a digital signal.

[0063] In S240, a height comparison result between the tobacco leaf height of the tobacco leaves that have fallen into the drop feeder and the second preset height is determined based on the electrical signal sent by the second photoelectric tube; and a target motor frequency of the lifting belt motor is determined based on the height comparison result, the current motor frequency of the lifting belt motor, and the second preset frequency supplement.

[0064] In order to avoid the situation that the amount of tobacco leaves stored in the drop feeder is too small, and the tobacco cutting machine needs to be paused during the tobacco cutting process due to the lack of stored tobacco leaves in the drop feeder, the tobacco leaf height of the tobacco leaves that have fallen into the drop feeder can be detected. Specifically, the electrical signal sent by the second photoelectric tube can be periodically obtained until the tobacco cutting machine stops cutting. For example, the electrical signal is obtained once a minute according to a one-minute period. The second photoelectric tube generates different electrical signals in the two cases of being blocked by tobacco leaves and not being blocked by tobacco leaves. Therefore, whether the tobacco leaf height of the tobacco leaves that have fallen into exceeds the second preset height can be determined based on the electrical signal generated by the second photoelectric tube located at the second preset height. The height comparison result can include that the tobacco leaf height of the tobacco leaves that have fallen into exceeds the second preset height, or that the tobacco leaf height of the tobacco leaves that have fallen into does not exceed the second preset height. The second preset height can be a middle value of the height of the drop feeder.

[0065] In the embodiment, the target motor frequency of the lifting belt motor is determined based on the height comparison result, the current motor frequency of the lifting belt motor, and the second preset frequency supplement, which includes: in the case that the height comparison result is that the tobacco leaf height of the tobacco leaves that have fallen into exceeds the second preset height, determining a frequency difference value between the current motor frequency and the second preset frequency supplement, and taking the frequency difference value as the target motor frequency; and in the case that the height comparison result is that the tobacco leaf height of the tobacco leaves that have fallen into does not exceed the second preset height, determining a frequency sum value between the current motor frequency and the second preset frequency supplement, and taking the frequency sum value as the target motor frequency.

[0066] Specifically, in the case that the tobacco height of the fallen tobacco exceeds the second preset height, in order to avoid the tobacco in the leaf falling device overflowing, the conveying speed of the lifting belt can be reduced by adjusting the working frequency of the lifting belt motor. Alternatively, a preset tobacco cutting flow of the tobacco cutter at the current time is determined, and a product of the preset tobacco cutting flow and a preset lifting belt frequency correction coefficient is taken as a current motor frequency of the lifting belt motor; a frequency difference between the current motor frequency and a second preset frequency supplement is taken as a target motor frequency. Exemplarily, the lifting belt frequency correction coefficient can be 0.005227111.

[0067] In the case that the height comparison result is that the tobacco height of the fallen tobacco does not exceed the second preset height, in order to avoid the situation that the tobacco cutter has no tobacco to cut, the conveying speed of the lifting belt can be increased by adjusting the working frequency of the lifting belt motor. Alternatively, a sum of the current motor frequency and the second preset frequency supplement is taken as the target motor frequency. Exemplarily, the second preset frequency supplement can be 0.05 Hz.

[0068] S250, generating a second control instruction based on the target motor frequency, and sending the second control instruction to the lifting belt motor.

[0069] Specifically, the second control instruction can be generated based on the target motor frequency, and the second control instruction can be sent to the lifting belt motor to control the operation of the lifting belt. Further, the motor frequency of the lifting belt motor can be continuously adjusted based on the electrical signal sent by the second photocell acquired in each period until the tobacco cutter stops cutting.

[0070] In the embodiment, the relationship between the tobacco height in the leaf falling device and the second preset height is determined based on the electrical signal of the second photocell, so that the situation that the tobacco cutter stops working due to no tobacco to cut can be avoided, and the situation that the tobacco in the leaf falling device overflows can also be avoided, thereby improving the operation stability and reliability of the lifting belt.

[0071] In the embodiment, the tobacco making system further comprises at least one distance measuring sensor and a pre-cut tobacco drying feeding device connected with the tobacco cutter, the pre-cut tobacco drying feeding device comprises a second storage bin and a material distribution trolley running in the second storage bin; the tobacco cutter comprises a knife roller and a tobacco cutting controller; and the distance measuring sensor is used to detect the distance between the material distribution trolley and the warehouse wall of the second storage bin in the running direction.

[0072] The ranging sensor emits a light beam to the cloth traveling crane near one end of the ranging sensor. The measurement range of the ranging sensor is (0-15) meters, and the measurement output is a (4-20) mA analog signal. By way of example, the ranging sensor can be arranged against the warehouse wall at the tail end of the second bin. The cloth traveling crane travels from the head end of the second bin to the tail end of the second bin, and the distance between the head end and the tail end of the second bin is L; the body length of the cloth traveling crane is less than L. The ranging sensor can detect the distance between the tail end of the second bin and one end of the cloth traveling crane.

[0073] In this embodiment, the method further includes: obtaining a current distance value between the cloth traveling crane and the warehouse wall of the second bin in the direction of travel at the current collection time collected by the ranging sensor; determining actual temporary tobacco data in the second bin based on the current distance value, determining a second data deviation corresponding to the second bin based on the preset temporary tobacco data corresponding to the second bin and the actual temporary tobacco data, determining a cutter roller target speed of the cutter roller based on the second data deviation, and generating a third control instruction based on the cutter roller target speed, and sending the third control instruction to the cutting controller to control the cutter roller to work at the cutter roller target speed.

[0074] In this embodiment, the current distance value is the distance value between the cloth traveling crane and the warehouse wall on the side where the ranging sensor is installed in the direction of travel.

[0075] In specific implementation, the current distance value corresponding to the current collection time collected by the ranging sensor can be periodically obtained during the cloth distribution process. Based on the current distance value, the actual temporary tobacco data in the second bin is determined, including: based on the current distance value and the preset movement mode of the cloth traveling crane, the actual temporary tobacco data of the second bin is determined.

[0076] In this embodiment, the body length of the cloth traveling crane is half of the bin length of the second bin, i.e., the body length of the cloth traveling crane is set to 1 / 2L to achieve the effect of filling the bin with tobacco. The tail end of the second bin is the discharge end, and the head end is the feeding end. The cloth traveling crane uses a pile searching method to distribute the tobacco in the bin. Specifically, the cloth distribution process can include two stages of front half bin distribution and rear half bin distribution. The front half bin distribution refers to distributing tobacco in the half bin corresponding to the discharge end of the second bin, i.e., the cloth traveling crane reverses the cloth distribution belt to uniformly distribute tobacco in the front half of the second bin. As the height of the tobacco pile increases, the cloth traveling crane retreats to continuously distribute the tobacco and ensure uniform distribution. When the cloth traveling crane retreats to the midpoint of the second bin, i.e., 1 / 2L, the front half bin distribution is completed, and the cloth traveling crane can reverse to prepare to start the rear half bin distribution. Specifically, the cloth distribution belt is reversed, and the cloth traveling crane starts to distribute tobacco from the key point of the second bin to the feeding end. As the height of the tobacco pile increases, the cloth traveling crane continues to retreat to distribute the tobacco, ensuring that the entire rear half bin is uniformly distributed. When the cloth traveling crane retreats to the feeding end of the second bin, the rear half bin distribution is completed.

[0077] wherein the actual temporary storage tobacco data is a proportion of a volume of the stored tobacco to a total volume of the second silo. The preset movement mode is that the material handling trolley moves towards the tail of the silo until the front half of the silo is filled, and then reverses.

[0078] In the embodiment, the current tobacco filling stage can be determined based on the current distance value, the preset movement mode and the movement direction of the material handling trolley. Specifically, when the movement direction is towards the tail of the silo, it indicates that the tobacco filling area is the front half of the silo, and the actual temporary storage tobacco data is:

[0079] S = (H1-H2) / H1*50%

[0080] wherein S represents the actual temporary storage tobacco data, H1 is the distance value measured by the distance sensor when the material handling trolley is next to the head of the second silo, and H2 is the current distance value.

[0081] When the movement direction is towards the head of the silo, it indicates that the tobacco filling area is the rear half of the silo, and the actual temporary storage tobacco data is:

[0082] S = [1+(H1-H2)] / H1*50%

[0083] wherein S represents the actual temporary storage tobacco data, H1 is the distance value measured by the distance sensor when the material handling trolley is next to the head of the second silo, and H2 is the current distance value.

[0084] The embodiment sets different ways of determining the actual temporary storage tobacco data for different tobacco filling stages, which is beneficial to improve the accuracy and convenience of determining the actual temporary storage tobacco data.

[0085] Further, the difference between the preset temporary storage tobacco data and the actual temporary storage tobacco data can be determined as the second data deviation. Those skilled in the art can determine the preset temporary storage tobacco data according to actual application conditions, which is not limited in the embodiment.

[0086] In order to eliminate the deviation between the actual temporary storage tobacco amount and the preset temporary storage tobacco amount of the second silo, so that the tobacco in the second silo meets the set requirements and ensures the continuity of the cut tobacco, the knife roll target speed of the knife roll can be determined based on the determined second data deviation, the third control instruction can be generated based on the knife roll target speed, the third control instruction can be sent to the cut tobacco controller to control the knife roll to work at the knife roll target speed, so as to adjust the cut tobacco flow by adjusting the knife roll speed, and further reduce the deviation between the actual temporary storage tobacco amount and the preset temporary storage tobacco amount.

[0087] Specifically, based on the second data deviation, the determination of the cutter roll target rotating speed of the cutter roll comprises: taking the product of the second data deviation and a preset coefficient as a cut tobacco flow correction coefficient; determining a target cut tobacco flow of the cut tobacco machine based on the cut tobacco flow correction coefficient and a preset cut tobacco flow; and determining the cutter roll target rotating speed of the cut tobacco machine based on the target cut tobacco flow, a preset cut tobacco machine cutter door height, a preset cut tobacco width and a preset cutter roll rotating speed coefficient.

[0088] Optionally, the preset coefficient can be 0.03. The preset cut tobacco flow is a preset cut tobacco flow of the cut tobacco feeder. The product of the preset coefficient and the second data deviation can be taken as the cut tobacco flow correction coefficient. The determination of the target cut tobacco flow of the cut tobacco machine based on the cut tobacco flow correction coefficient and the preset cut tobacco flow can be as follows:

[0089] Q3=Q4*(1+K2)

[0090] wherein Q3 is the target cut tobacco flow, Q4 is the preset cut tobacco flow, i.e. the flow set by the electronic belt scale before drying in the tobacco processing control work order management system, and K2 is the cut tobacco flow correction coefficient.

[0091] When the second data deviation is less than 0, the target cut tobacco flow should be less than the preset cut tobacco flow to avoid stopping cutting due to full material in the second material bin. When the second data deviation is greater than 0, the target cut tobacco flow needs to be greater than the preset cut tobacco flow to avoid low occupancy of the second material bin.

[0092] In specific implementation, the product of the preset cut tobacco machine cutter door height and the preset cut tobacco width can be determined as a first value, the ratio between the preset cutter roll rotating speed coefficient and the first value can be determined, the product between the ratio and the target cut tobacco flow can be determined, and the product can be taken as the cutter roll target rotating speed. When the product between the determined ratio and the target cut tobacco flow is a decimal number, an integer operation can be performed, and the integer value after the operation can be taken as the cutter roll target rotating speed. The preset cutter roll rotating speed coefficient can be 5.853097.

[0093] In the embodiment, the cutter roll rotating speed changes with the second data deviation of the material in the feeder, which ensures that the cut tobacco machine will not stop cutting due to full or insufficient material in the feeder before drying, and improves the running stability and reliability of the cutter roll of the cut tobacco machine.

[0094] Figure 4 is a structural schematic diagram of a discharge flow control device according to an embodiment of the present application, which is used to execute the discharge flow control method provided in any of the above embodiments. The device and the discharge flow control method of each of the above embodiments belong to the same inventive concept, and the details not described in the embodiment of the discharge flow control device can be referred to the embodiment of the discharge flow control method.

[0095] In the embodiment, the device is arranged in a tobacco making system, the tobacco making system comprising a flow sensor, an outfeed conveyor belt, a pre-cut feeding machine connected with the outfeed conveyor belt, a drop feeder connected with the pre-cut feeding machine, and a cutting machine connected with the drop feeder; the outfeed conveyor belt is used to convey tobacco in at least one tobacco storage cabinet to the pre-cut feeding machine, and the pre-cut feeding machine comprises a first hopper; the flow sensor is used to detect the tobacco flow conveyed on the outfeed conveyor belt; as shown in Figure 4 The device comprises:

[0096] A current outfeed data acquisition module 10 is configured to acquire current outfeed data sent by the flow sensor; the current outfeed data comprises the tobacco flow conveyed on the outfeed conveyor belt corresponding to a current time period;

[0097] A data determination module 11 is configured to determine actual temporary storage tobacco data of the drop feeder based on the current outfeed data;

[0098] An instruction generation module 12 is configured to determine a first data deviation between the actual temporary storage tobacco data of the drop feeder and preset target temporary storage tobacco data, generate a first control instruction based on the first data deviation, and send the first control instruction to the conveyor belt motor to enable the conveyor belt motor to adjust the outfeed flow of the outfeed conveyor belt.

[0099] In any optional technical solution in the embodiments of the present application, the data determination module 11 optionally comprises:

[0100] A cut tobacco cumulative weight determination sub-module is configured to determine a cut tobacco cumulative weight corresponding to the current time period of the cutting machine based on a preset cut tobacco flow of the cutting machine;

[0101] A conveying cumulative weight determination sub-module is configured to determine a conveying cumulative weight corresponding to the current time period of the outfeed conveyor belt based on the current outfeed data;

[0102] A weight difference determination sub-module is configured to determine a weight difference between the conveying cumulative weight and the cut tobacco cumulative weight, and determine the actual temporary storage tobacco data of the drop feeder based on the weight difference.

[0103] In any optional technical solution in the embodiments of the present application, the instruction generation module 12 optionally comprises:

[0104] A product determination sub-module is configured to determine a product between the actual temporary storage tobacco data and a preset multiple as an outfeed flow correction coefficient;

[0105] A target outfeed flow determination sub-module is configured to determine a target outfeed flow of the outfeed conveyor belt based on the outfeed flow correction coefficient, determine a target operating frequency of the conveyor belt motor based on the target outfeed flow, and generate the first control instruction based on the target operating frequency.

[0106] In any optional technical solution in the embodiment of the present application, the tobacco making system further comprises at least one first photoelectric tube, the discharge conveying belt is connected with the first silo, and the first photoelectric tube is installed at a first preset height of a warehouse wall of the first silo.

[0107] The target discharge flow determination sub-module comprises:

[0108] The determination unit is configured to determine, based on the electric signal sent by the first photoelectric tube, whether the tobacco height of the stored tobacco in the first silo exceeds the first preset height, and if so, update the target operating frequency based on the first preset frequency supplement, and generate the first control instruction based on the updated target operating frequency.

[0109] In any optional technical solution in the embodiment of the present application, the tobacco making system further comprises at least one first photoelectric tube, the discharge conveying belt is connected with the first silo, and the first photoelectric tube is installed at a first preset height of a warehouse wall of the first silo.

[0110] The height comparison result determination module is configured to determine, based on the electric signal sent by the second photoelectric tube, a height comparison result between the tobacco height of the fallen tobacco in the feeder and the second preset height.

[0111] The target motor frequency determination module is configured to determine, based on the height comparison result, the current motor frequency of the lifting belt motor and the second preset frequency supplement, a target motor frequency of the lifting belt motor.

[0112] The instruction sending module is configured to generate a second control instruction based on the target motor frequency, and send the second control instruction to the lifting belt motor.

[0113] In any optional technical solution in the embodiment of the present application, the target motor frequency determination module comprises:

[0114] The frequency difference value determination sub-module is configured to, in a case where the height comparison result is that the tobacco height of the fallen tobacco exceeds the second preset height, determine a frequency difference value between the current motor frequency and the second preset frequency supplement, and take the frequency difference value as the target motor frequency.

[0115] The frequency sum value determination sub-module is configured to, in a case where the height comparison result is that the tobacco height of the fallen tobacco does not exceed the second preset height, determine a frequency sum value between the current motor frequency and the second preset frequency supplement, and take the frequency sum value as the target motor frequency.

[0116] In any optional technical solution in the embodiment of the present application, optionally, the cigarette making system further comprises at least one distance measuring sensor, and a pre-drying feeding machine connected with the cutter; the pre-drying feeding machine comprises a second bin and a material distribution trolley running in the second bin; the cutter comprises a cutter roller and a cutter controller; the distance measuring sensor is used to detect the distance between the material distribution trolley and the bin wall of the second bin in the running direction; the device further comprises:

[0117] a current distance value acquisition module, configured to acquire a current distance value between the material distribution trolley and the bin wall of the second bin in the running direction at a current acquisition time collected by the distance measuring sensor;

[0118] a second data deviation determination module, configured to determine actual temporary cut tobacco data in the second bin based on the current distance value, and determine a second data deviation corresponding to the second bin based on preset temporary cut tobacco data corresponding to the second bin and the actual temporary cut tobacco data.

[0119] a third control instruction generation module, configured to determine a cutter roller target rotating speed of the cutter roller based on the second data deviation, generate a third control instruction based on the cutter roller target rotating speed, and send the third control instruction to the cutter controller to control the cutter roller to work at the cutter roller target rotating speed.

[0120] In any optional technical solution in the embodiment of the present application, optionally, the body length of the material distribution trolley is half of the bin length of the second bin; the second data deviation determination module comprises:

[0121] an actual temporary cut tobacco data determination submodule, configured to determine the actual temporary cut tobacco data of the second bin based on the current distance value and a preset movement mode of the material distribution trolley.

[0122] In any optional technical solution in the embodiment of the present application, optionally, the third control instruction generation module comprises:

[0123] a cutter flow correction coefficient determination submodule, configured to take the product of the second data deviation and a preset coefficient as a cutter flow correction coefficient;

[0124] a target cutter flow determination submodule, configured to determine a target cutter flow of the cutter based on the cutter flow correction coefficient and a preset drying flow;

[0125] a cutter roller target rotating speed determination submodule, configured to determine the cutter roller target rotating speed of the cutter based on the target cutter flow, a preset cutter door height, a preset cutter width and a preset cutter roller rotating speed coefficient.

[0126] The technical scheme of the embodiment of the present application is applied to a tobacco making system, and the tobacco making system comprises a flow sensor, a discharge conveying belt, a pre-cutting feeding machine connected with the discharge conveying belt, a material dropping device connected with the pre-cutting feeding machine, and a tobacco cutting machine connected with the material dropping device; the discharge conveying belt is used for conveying tobacco in at least one tobacco storage cabinet to the pre-cutting feeding machine, the pre-cutting feeding machine comprises a first material bin, and the flow sensor is used for detecting the flow of the tobacco conveyed on the discharge conveying belt; by acquiring current discharge data sent by the flow sensor, actual temporary storage tobacco data of the material dropping device is determined, a first data deviation between the actual temporary storage tobacco data of the material dropping device and preset target temporary storage tobacco data is determined, a first control instruction is generated based on the first data deviation, and the first control instruction is sent to a conveying belt motor, so that the conveying belt motor adjusts the discharge flow of the discharge conveying belt; the technical scheme of the embodiment of the present application does not need to rely on manual experience, controls the discharge conveying belt based on the first data deviation, and makes the set discharge flow more accurate; at the same time, the situation that the tobacco cutting machine stops or the material dropping device is full is avoided, and the stability and reliability of each device in the tobacco making system are beneficial.

[0127] It is worth noting that in the embodiment of the above discharge flow control device, each unit and module included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional unit is only for the convenience of mutual differentiation, and does not limit the protection scope of the present application.

[0128] Figure 5 The structural schematic diagram of the electronic device for realizing the discharge flow control method of the embodiment of the present application. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections, and relationships, and their functions, are merely examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0129] As Figure 5As shown, the electronic device 20 includes at least one processor 21, and a memory, such as a read-only memory (ROM) 22, a random access memory (RAM) 23, etc., communicatively connected to the at least one processor 21, where the memory stores computer programs executable by the at least one processor. The processor 21 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 22 or loaded from the storage unit 28 into the random access memory (RAM) 23. In the RAM 23, various programs and data required for the operation of the electronic device 20 can also be stored. The processor 21, the ROM 22, and the RAM 23 are connected to each other through a bus 24. An input / output (I / O) interface 25 is also connected to the bus 24.

[0130] Various components in the electronic device 20 are connected to the I / O interface 25, including an input unit 26, such as a keyboard, a mouse, etc., an output unit 27, such as various types of displays, a speaker, etc., a storage unit 28, such as a magnetic disk, an optical disk, etc., and a communication unit 29, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 29 allows the electronic device 20 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0131] The processor 21 can be various general and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 21 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 21 performs various methods and processes described above, such as the outflow control method.

[0132] In some embodiments, the outflow control method can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 28. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 20 via the ROM 22 and / or the communication unit 29. When the computer program is loaded into the RAM 23 and executed by the processor 21, one or more steps of the outflow control method described above can be performed. Alternatively, in other embodiments, the processor 21 can be configured to perform the outflow control method by any other appropriate means, such as by means of firmware.

[0133] The various embodiments of the systems and techniques described above can be implemented in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a load programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0134] Computer programs used to implement the processes of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer program, when executed, can cause instructions defined in the flow charts and / or block diagrams to be implemented. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a standalone software package and partially on a remote machine or entirely on a remote machine or server.

[0135] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store computer programs for use by or in connection with an instruction execution system, apparatus, or device. Computer-readable storage media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium will include one or more lines of electrical connections, portable computer disks, hard disk drives, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fibers, portable compact disc read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0136] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0137] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0138] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. A server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0139] The embodiments also provide a computer program product, comprising a computer program which, when executed by a processor, implements the outflow control method as provided by any of the embodiments of the present application.

[0140] The computer program code can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce the computer implemented process such that the

[0141] It should be understood that the various forms of flow shown in the figures are illustrative examples of implementing the steps of the application. Several steps have been described as being performed by a single device. It will be understood that these steps can be performed by a single device or multiple devices, and that the steps can be performed in an order different from that shown in the figures. For example, the steps described in the figures can be performed in parallel or in a different order, as long as the desired results of the application are achieved. The application is not limited in this regard.

[0142] The specific embodiments have been shown and described for the purposes of illustrating the physiological principles of the application and its practical application. It is therefore to be understood that various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the application. The scope of the application is not to be limited by specific illustrative embodiments. The application is to cover any and all modifications and the equivalents thereof within the spirit and scope of the application.

Claims

1. A method for controlling discharge flow rate, characterized in that, The method is applied to a tobacco manufacturing system, which includes a flow sensor, a discharge conveyor belt, a pre-shredding feeder connected to the discharge conveyor belt, a feeder connected to the pre-shredding feeder, and a shredder connected to the feeder. The discharge conveyor belt is used to transport tobacco leaves from at least one tobacco storage tank to the pre-shredding feeder, which includes a first hopper. The flow sensor is used to detect the flow rate of tobacco leaves transported on the discharge conveyor belt. Acquire the current discharge data sent by the flow sensor; wherein, the current discharge data includes the flow rate of tobacco leaves transmitted on the discharge conveyor belt corresponding to the current time period; Based on the current discharge data, determine the actual temporary tobacco leaf data stored in the feeder; A first data deviation is determined between the actual temporary tobacco leaf data of the feeder and the preset target temporary tobacco leaf data. A first control command is generated based on the first data deviation and sent to the conveyor belt motor so that the conveyor belt motor adjusts the discharge flow rate of the discharge conveyor belt. The step of determining the actual temporary tobacco leaf data of the feeder based on the current discharge data includes: Based on the preset shredding flow rate of the shredder, determine the cumulative shredding weight of the shredder in the current time period; Based on the current discharge data, determine the cumulative weight of the discharge conveyor belt during the current time period; The weight difference between the cumulative weight of the transport and the cumulative weight of the shredded tobacco is determined, and the actual temporary tobacco leaf data of the feeder is determined based on the weight difference. The tobacco-making system further includes at least one distance sensor and a pre-drying feeder connected to the shredder, the pre-drying feeder including a second hopper and a fabric trolley running in the second hopper; the shredder includes a cutter roller and a shredder controller; the distance sensor is used to detect the distance between the fabric trolley and the hopper wall of the second hopper in the direction of travel; the method further includes: The distance between the fabric trolley and the warehouse wall of the second hopper at the current acquisition time is obtained from the distance measuring sensor. Based on the current distance value, the actual temporary tobacco data in the second hopper is determined, and based on the preset temporary tobacco data corresponding to the second hopper and the actual temporary tobacco data, the second data deviation corresponding to the second hopper is determined. Based on the second data deviation, the target rotation speed of the cutter roller is determined, a third control command is generated based on the target rotation speed, and the third control command is sent to the shredding controller to control the cutter roller to work according to the target rotation speed. The length of the fabric trolley is half the length of the second hopper; determining the actual temporary tobacco data in the second hopper based on the current distance value includes: Based on the current distance value and the preset movement mode of the fabric trolley, the actual temporary tobacco data stored in the second hopper is determined.

2. The method according to claim 1, characterized in that, The generation of the first control command based on the first data deviation includes: The product between the actual temporarily stored tobacco leaf data and the preset multiple is determined as the discharge flow rate correction coefficient; Based on the discharge flow rate correction coefficient, the target discharge flow rate of the discharge conveyor belt is determined, the target operating frequency of the conveyor belt motor is determined based on the target discharge flow rate, and the first control command is generated based on the target operating frequency.

3. The method according to claim 2, characterized in that, The tobacco-making system also includes at least one first photoelectric tube, and the discharge conveyor belt is connected to the first silo; the first photoelectric tube is installed at a first preset height on the warehouse wall of the first silo; The generation of the first control command based on the target operating frequency includes: Based on the electrical signal sent by the first phototube, it is determined whether the height of the tobacco leaves stored in the first hopper exceeds the first preset height; If so, the target operating frequency is updated based on the first preset frequency supplement, and the first control command is generated based on the updated target operating frequency.

4. The method according to claim 1, characterized in that, The pre-shredding feeder further includes a lifting belt for connecting the first hopper and the discharge device; the smoke-making system further includes a lifting belt motor and at least one second photoelectric tube, the second photoelectric tube being installed at a second preset height on the structural wall of the discharge device; the method further includes: Based on the electrical signal sent by the second phototube, the height comparison result between the height of the tobacco leaves that have fallen into the feeder and the second preset height is determined; Based on the height comparison result, the current motor frequency of the lifting belt motor, and the second preset frequency supplement, the target motor frequency of the lifting belt motor is determined; A second control command is generated based on the target motor frequency, and the second control command is sent to the lifting belt motor.

5. The method according to claim 4, characterized in that, The step of determining the target motor frequency of the lifting belt motor based on the height comparison result, the current motor frequency of the lifting belt motor, and the second preset frequency supplement amount includes: If the height comparison result indicates that the height of the tobacco leaf that has fallen into the tobacco leaf exceeds the second preset height, the frequency difference between the current motor frequency and the second preset frequency supplement is determined, and the frequency difference is used as the target motor frequency. If the height comparison result indicates that the height of the tobacco leaf that has fallen into the tobacco leaf does not exceed the second preset height, then the sum of the frequencies between the current motor frequency and the second preset frequency supplement is determined, and the sum of the frequencies is used as the target motor frequency.

6. The method according to claim 1, characterized in that, Determining the target rotational speed of the cutter roller based on the second data deviation includes: The product of the second data deviation and the preset coefficient is used as the shredding flow rate correction coefficient; Based on the shredding flow rate correction coefficient and the preset drying flow rate, the target shredding flow rate of the shredder is determined; Based on the target shredding flow rate, the preset shredder gate height, the preset shredding width, and the preset cutter roller speed coefficient, the target speed of the cutter roller is determined.

7. A discharge flow rate control device, characterized in that, The device is installed in a tobacco production system, which includes a flow sensor, a discharge conveyor belt, a pre-shredding feeder connected to the discharge conveyor belt, a feeder connected to the pre-shredding feeder, and a shredder connected to the feeder. The discharge conveyor belt is used to transport tobacco leaves from at least one tobacco storage cabinet to the pre-shredding feeder, which includes a first hopper. The flow sensor is used to detect the flow rate of tobacco leaves transported on the discharge conveyor belt. The device includes: The current discharge data acquisition module is used to acquire the current discharge data sent by the flow sensor; wherein, the current discharge data includes the flow rate of tobacco leaves transmitted on the discharge conveyor belt corresponding to the current time period; The data determination module is used to determine the actual temporary tobacco leaf data of the feeder based on the current discharge data; The instruction generation module is used to determine a first data deviation between the actual temporary tobacco leaf data of the feeder and the preset target temporary tobacco leaf data, generate a first control instruction based on the first data deviation, and send the first control instruction to the conveyor belt motor so that the conveyor belt motor adjusts the discharge flow rate of the discharge conveyor belt. The data determination module includes: The cumulative shredding weight determination submodule is used to determine the cumulative shredding weight of the shredder in the current time period based on the preset shredding flow rate of the shredder. The cumulative transmission weight determination submodule is used to determine the cumulative transmission weight of the discharge conveyor belt in the current time period based on the current discharge data. The weight difference determination submodule is used to determine the weight difference between the cumulative weight of the transmission and the cumulative weight of the shredded tobacco, and to determine the actual temporary tobacco leaf data of the feeder based on the weight difference; The tobacco-making system further includes at least one distance sensor and a pre-drying feeder connected to the shredder, the pre-drying feeder including a second hopper and a fabric trolley running in the second hopper; the shredder includes a cutter roller and a shredder controller; the distance sensor is used to detect the distance between the fabric trolley and the hopper wall of the second hopper in the direction of travel; the device further includes: The current distance value acquisition module is used to acquire the current distance value between the fabric trolley and the warehouse wall of the second silo at the current acquisition time, as collected by the ranging sensor. The second data deviation determination module is used to determine the actual temporary tobacco data in the second hopper based on the current distance value, and to determine the second data deviation corresponding to the second hopper based on the preset temporary tobacco data corresponding to the second hopper and the actual temporary tobacco data. The third control command generation module is used to determine the target rotation speed of the cutter roller based on the second data deviation, generate a third control command based on the target rotation speed of the cutter roller, and send the third control command to the shredding controller to control the cutter roller to work according to the target rotation speed of the cutter roller; The length of the fabric trolley is half the length of the second hopper; the second data deviation determination module includes: The actual temporary tobacco data determination submodule is used to determine the actual temporary tobacco data in the second hopper based on the current distance value and the preset movement mode of the fabric trolley.

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