Stable Control Method and System for Long-Distance Conveyor Belt

Abstract

The present invention belongs to the field of control technology, and provides a stable control method and system for a long-distance conveyor belt. The method includes: in the case where a faulty frequency conversion unit needs to be cut out, determining a plurality of normal frequency conversion units to be replaced; obtaining first load information and second load information of the long-distance conveyor belt, using a belt jitter analysis model to perform jitter prediction analysis on the first load information, and obtaining multiple cut-in planning information of the plurality of normal frequency conversion units; using the second load information to perform overload analysis on each cut-in planning information, screening out the target cut-in planning information, and controlling each normal frequency conversion unit to gradually perform hot cut-in according to the target cut-in planning information to replace each faulty frequency conversion unit. The solution of the present invention can avoid the long-distance conveyor belt from stopping, and can minimize the jitter of the belt during the hot cut-in process.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a stable control method and system for a long-distance transmission belt. Background Art

[0002] In many industrial applications, the load power device is generally an electric motor, which is driven by a frequency converter. In some key process links, the load is not allowed to shut down, otherwise it will cause significant property losses or casualties.

[0003] For critical loads, one solution is: the system electrical power distribution solution uses two sets of frequency conversion devices for critical loads, one for use and one for backup, such as Figure 1 As shown in the figure, when one of the frequency converters is damaged, the other frequency converter is switched in. Another solution is to parallel the redundant power units, such as Figure 2 As shown in the figure, since the wearing parts of the inverter device are the main circuit power devices, the main circuit power devices are designed as power units. Multiple power units are connected in parallel. For critical loads, redundancy is achieved by increasing the number of power units. After a power unit fails, the faulty power unit is exited to ensure the continuous operation of the load equipment. However, the existing one-in-one-standby solution is divided into manual mode and automatic mode. In manual mode, after the running inverter fails, the manual operation of the standby inverter equipment generally takes about 5-10 minutes. In automatic mode, the switching time also takes 1-2 seconds. The parallel operation of redundant power units requires the removal of the electrical cable connection of the faulty unit. During the removal process, it is necessary to wait for the busbar to be discharged. The entire replacement process takes more than 30 minutes.

[0004] The above solutions can meet most field applications. However, when the long-distance belt transmission device is running at full load, if the inverter fails, the motor speed will quickly drop to zero speed. Restarting the belt at full load requires a large starting torque. Re-activating the inverter through the above two solutions requires a large starting current, which is easy to exceed the inverter current output capacity, resulting in inverter overcurrent fault and startup failure. In order to solve the problem of belt conveyor failure and full load startup, there are generally two solutions. One is to enlarge the frequency conversion equipment by about 2 times when selecting it, and match the power distribution capacity at the same time. The other is that after the belt conveyor stops, the maintenance personnel remove the transported items from the belt conveyor and start the belt with light load. The above two solutions have the problems of high cost and complex maintenance.

[0005] The present invention provides a stable control scheme for a long-distance transmission belt, which can realize the thermal exit of a faulty power unit and the thermal entry of a normal power unit, and can meet the application requirements of long-distance belt transport devices and other key loads without stopping. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a stable control method, system, electronic device, computer storage medium and computer program product for a long-distance conveyor belt.

[0007] The present invention discloses a stable control method for a long-distance conveyor belt, the method comprising:

[0008] In the case where a faulty frequency conversion unit needs to be cut out, determining a plurality of normal frequency conversion units for replacement;

[0009] Obtaining first load information and second load information of the long-distance conveyor belt, using a belt jitter analysis model to perform jitter prediction analysis on the first load information, and obtaining multiple cut-in planning information of the plurality of normal frequency conversion units, the cut-in planning information including the cut-in sequence and cut-in interval of each normal frequency conversion unit; wherein, the first load information is the load information of the existing load on the long-distance conveyor belt, and the second load information is the load information of the new load on the long-distance conveyor belt during the process of cutting in the plurality of normal frequency conversion units.

[0010] Using the second load information to perform overload analysis on each of the cut-in planning information, screening out target cut-in planning information, and controlling each of the normal frequency conversion units to gradually hot cut in according to the target cut-in planning information to replace each faulty frequency conversion unit.

[0011] Optionally, the determining a plurality of normal frequency conversion units for replacement includes:

[0012] In the case where a faulty frequency conversion unit needs to be cut out, scanning all frequency conversion units in the standby state, determining the frequency conversion units in the normal working state and having the rated parameters closest to the faulty frequency conversion unit, and determining these frequency conversion units as the plurality of normal frequency conversion units for replacement.

[0013] Optionally, the using a belt jitter analysis model to perform jitter prediction analysis on the first load information includes:

[0014] Parsing the first load information, and determining whether the cargo center of gravity height information is parsed. If the cargo center of gravity height information is higher than the target threshold, using a belt jitter analysis model to perform jitter prediction analysis on the first load information, otherwise not using a belt jitter analysis model to perform jitter prediction analysis on the first load information.

[0015] Optionally, the using a belt jitter analysis model to perform jitter prediction analysis on the first load information and obtaining multiple cut-in planning information of the plurality of normal frequency conversion units includes:

[0016] Obtain the load history record of the long-distance transmission belt in the recent period, calculate the average load fluctuation amplitude based on the load history record, and determine the target quantity based on the average load fluctuation amplitude;

[0017] Input the first rated parameters of each faulty frequency conversion unit, the second rated parameters of each normal frequency conversion unit, the first load information, and the target quantity into the belt jitter analysis model, and obtain multiple cut-in planning information corresponding to the target quantity analyzed by the belt jitter analysis model.

[0018] Optionally, performing an overload analysis on each of the cut-in planning information using the second load information, and screening out the target cut-in planning information, including:

[0019] Parse the predicted second load weight input to the long-distance transmission belt during the target cut-in period from the second load information, and perform an overload analysis on each cut-in sub-period in each of the cut-in planning information according to the second load weight, the preset transmission completion weight, and the first load weight; wherein, the first load weight is parsed from the first load information;

[0020] Determine the cut-in planning information with the lowest total overload power for all cut-in sub-periods as the target cut-in planning information.

[0021] The present invention discloses a stable control system for a long-distance conveyor belt. The system includes at least one processor and a memory. The processor calls and executes the computer program code stored in the memory to implement the following steps:

[0022] In the case where a faulty frequency conversion unit needs to be cut out, determine several normal frequency conversion units to replace it;

[0023] Obtain the first load information and the second load information of the long-distance conveyor belt, and use the belt jitter analysis model to perform jitter prediction analysis on the first load information to obtain multiple cut-in planning information of several normal frequency conversion units. The cut-in planning information includes the cut-in sequence and cut-in interval of each normal frequency conversion unit; wherein, the first load information is the load information of the existing load on the long-distance conveyor belt, and the second load information is the load information of the newly added load on the long-distance conveyor belt during the process of cutting in several normal frequency conversion units;

[0024] Perform an overload analysis on each of the cut-in planning information using the second load information, screen out the target cut-in planning information, and control each of the normal frequency conversion units to gradually hot cut in according to the target cut-in planning information to replace each faulty frequency conversion unit.

[0025] The present invention also discloses an electronic device, including: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, where the processor is configured to execute the computer program to implement the method as described in any one of the preceding items.

[0026] The present invention also discloses a computer storage medium storing a computer program, where the computer program can be executed by a processor to implement the method as described in any one of the preceding items.

[0027] The present invention also discloses a computer program product containing computer code, where the computer code can be executed by a processor of an electronic device to implement the method as described in any one of the preceding items.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows: The stable control method for the long-distance conveyor belt of the present invention can achieve the hot removal of a faulty frequency conversion unit and the hot insertion of a normal frequency conversion unit without stopping the machine, greatly shortening the fault handling time and reducing the risk of system operation interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0030] Figure 1 is a schematic flowchart of a stable control method for a long-distance conveyor belt disclosed in an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a drive system for a long-distance conveyor belt based on a frequency conversion unit disclosed in an embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of a stable control system for a long-distance conveyor belt disclosed in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present application.

[0034] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0035] Regarding the above technical problems, as Figure 1 shown, an embodiment of the present invention discloses a stable control method for a long-distance conveyor belt, and the method includes:

[0036] S10. When a faulty frequency conversion unit needs to be cut out, determine a number of normal frequency conversion units for replacement.

[0037] During the process of the long-distance conveyor belt transporting goods, it is detected that one or more frequency conversion units have failed (such as detecting fault signals such as abnormal current or excessive temperature beyond the safe range of the frequency conversion unit). At this time, the fault handling mechanism is immediately started. The working states of all frequency conversion units to be cut in are scanned and detected to identify those frequency conversion units in normal working states, and these normal frequency conversion units are used to replace the faulty frequency conversion units. The powers of the faulty frequency conversion units can be different.

[0038] Among them, as Figure 2 shown, the frequency conversion unit of the present invention includes a rectification unit and an inversion unit.

[0039] S20. Obtain the first load information and the second load information of the long-distance conveyor belt, and use the belt jitter analysis model to perform jitter prediction analysis on the first load information to obtain multiple cut-in planning information of a number of normal frequency conversion units, where the cut-in planning information includes the cut-in sequence and cut-in interval of each normal frequency conversion unit; wherein, the first load information is the load information of the existing load on the long-distance conveyor belt, and the second load information is the load information of the new load on the long-distance conveyor belt during the process of cutting in a number of normal frequency conversion units.

[0040] By perceiving and inferring the motion state of the long-distance conveyor belt, the relevant information of the goods being transported currently can be predicted, that is, the first load information, and the obtained first load information is input into the pre-established belt jitter analysis model. Through the calculation and analysis of this model, it is predicted how the belt may jitter when normal frequency conversion units with different powers are cut in at different sequences and time intervals.

[0041] After analysis and calculation, multiple cut-in planning information is obtained. For example: Cut-in planning information one: Normal frequency conversion unit 5 is cut in first, normal frequency conversion unit 6 is cut in after an interval of 2 seconds, and then normal frequency conversion unit 7 is cut in after an interval of 3 seconds; Cut-in planning information two: Normal frequency conversion unit 6 is cut in first, normal frequency conversion unit 7 is cut in after an interval of 3 seconds, and then normal frequency conversion unit 5 is cut in after an interval of 2 seconds.

[0042] During the process of preparing to switch in the determined normal frequency conversion units (such as No. 5, 6, and 7), since the belt is still running, new goods will continuously be conveyed onto the belt. Relevant information about the newly added goods on the belt during the process of switching in the normal frequency conversion units is obtained in real time through relevant monitoring equipment (such as a computer vision-based goods monitor installed at the starting end of the belt, etc.), such as the weight of the goods (for example, it is estimated that 0.5 tons of goods will be newly added per second), position and other information, that is, the second load information.

[0043] S30. Use the second load information to conduct an overload analysis on each of the switching-in planning information, screen out the target switching-in planning information, and control each of the normal frequency conversion units to gradually hot-switch in according to the target switching-in planning information to replace each faulty frequency conversion unit.

[0044] Combine the obtained second load information with each piece of switching-in planning information obtained in the previous step. For each piece of switching-in planning information, calculate whether the total load borne by equipment such as the belt and the motor will exceed its rated load capacity considering the continuously newly added goods load on the belt during the process of switching in the normal frequency conversion unit according to this plan. For example, for planning information one, after the normal frequency conversion unit 5 is switched in, as time goes by and new goods are continuously added, it is calculated that when the normal frequency conversion unit 6 is switched in, the total load may reach 120% of the motor's rated load, there is an overload risk; while for planning information two, it is calculated that during the entire process of switching in the normal frequency conversion units, the total load always remains at about 90% of the motor's rated load and there will be no overload situation.

[0045] Through the overload analysis of each piece of switching-in planning information, screen out the switching-in planning information that will not cause equipment overload as the target switching-in planning information. In the above example, planning information two is determined as the target switching-in planning information.

[0046] According to the screened target switching-in planning information (such as the above-mentioned planning information two), control the normal frequency conversion unit 6 to hot-switch in first (hot-switching in means connecting the normal frequency conversion unit to the drive system and making it start working without stopping the machine). After an interval of 3 seconds, control the normal frequency conversion unit 7 to hot-switch in. After another interval of 2 seconds, control the normal frequency conversion unit 5 to hot-switch in, thereby gradually replacing the faulty frequency conversion units, realizing the stable operation of the long-distance conveyor belt in case of a fault, and avoiding problems such as high costs and complex maintenance caused by starting the belt at full load.

[0047] It should be noted that when hot-switching each normal frequency conversion unit, first control the DC circuit breaker and the outgoing line circuit breaker corresponding to the normal frequency conversion unit to be closed, and then control the normal frequency conversion unit to be hot-switched to drive wave generation and information interaction, so as to realize the normal operation of the normal frequency conversion unit. Correspondingly, when cutting out the faulty frequency conversion unit, first control the DC circuit breaker and the outgoing line circuit breaker corresponding to the faulty frequency conversion unit to open, and then stop the drive wave generation and information interaction of the faulty unit. Moreover, this solution of the present invention is preferably enabled when multiple frequency conversion units fail.

[0048] The stable control method for the long-distance conveyor belt of the present invention can realize the hot-cutting out of the faulty frequency conversion unit and the hot-switching in of the normal frequency conversion unit without stopping the machine, greatly shortening the fault handling time and reducing the risk of system operation interruption.

[0049] Optionally, the determining of several normal frequency conversion units for replacement includes:

[0050] In the case where the faulty frequency conversion unit needs to be cut out, scan all the frequency conversion units in the standby state, determine the frequency conversion units that are in the normal working state and whose rated parameters are closest to the faulty frequency conversion unit, and determine these frequency conversion units as several normal frequency conversion units for replacement.

[0051] In this embodiment, in the operating system of the long-distance conveyor belt, when it is detected that a certain frequency conversion unit fails, such as abnormal current or temperature exceeding the safe range and needs to be cut out, start a comprehensive scanning program, check all the frequency conversion units in the standby state one by one, and evaluate their working states, and preferably select those frequency conversion units in the normal working state.

[0052] At the same time, if the rated parameters of the replaced frequency conversion unit (the rated parameters of the faulty frequency conversion unit can be different from each other) differ too much from the faulty unit, it may cause unstable power output during the operation of the belt after being connected to the system. For example, if the power of the replacement unit is too large, it may cause the belt to accelerate too fast, resulting in belt jitter or even damage; if the power is too small, it may not be able to drive the fully loaded belt, resulting in transportation stagnation. In order to ensure that the replacement process is as smooth as possible, there are additional requirements for the frequency conversion units in normal operation, that is, their rated parameters should be closest to those of the faulty frequency conversion unit. The rated parameters include but are not limited to rated power, rated current, rated voltage, etc.

[0053] Optionally, the using of the belt jitter analysis model to perform jitter prediction analysis on the first load information includes:

[0054] Parse the first load information and determine whether the cargo center of gravity height information can be obtained. If the cargo center of gravity height information is higher than the target threshold, use the belt jitter analysis model to perform jitter prediction analysis on the first load information; otherwise, do not use the belt jitter analysis model to perform jitter prediction analysis on the first load information.

[0055] In this embodiment, the foregoing embodiment of the present invention adopts a progressive thermal cut-in scheme for the normal frequency conversion unit. This scheme can make the cut-in of the frequency conversion unit smoother, which is beneficial to reducing the probability of the long-distance transmission belt jittering due to sudden power increase. However, the progressive thermal cut-in scheme will also cause the speed to slow down during cut-in, and the long-distance transmission belt may experience a significant speed reduction during the cut-in process. On the one hand, this will reduce the transmission efficiency, and on the other hand, it may also cause the goods being transmitted to jitter due to the significant speed reduction.

[0056] In response to this, the present invention sets to first determine whether the cargo center of gravity height information can be obtained from the first load information. When the cargo center of gravity height information is higher than the preset target threshold (for example, when transporting large and stacked-high goods), the jitter of the belt may cause the goods to tip over or even fall off the belt, resulting in damage to the goods. Therefore, at this time, it is necessary to plan in advance the cut-in scheme of the normal frequency conversion unit and call the belt jitter analysis model to perform a comprehensive jitter prediction analysis on the first load information to select a cut-in scheme with as little jitter as possible, which is particularly critical when the goods being transmitted are valuable.

[0057] If the cargo center of gravity height information is not higher than the preset target threshold, that is, when the cargo center of gravity is in a relatively low and stable state, it indicates that the probability of adverse situations such as the goods tipping over due to belt jitter is relatively low. At this time, all normal frequency conversion units can be directly controlled to cut in together, which can make the long-distance transmission belt quickly recover the transmission power to ensure that the transmission speed is within the predetermined range. At this time, the jitter of the belt is acceptable. In addition, by setting it in this way, unnecessary consumption of computing resources can be reduced, enabling the system to process other key tasks more efficiently.

[0058] Among them, the target threshold can be set according to the number and / or total power of the faulty frequency conversion units. Specifically, when the number of faulty frequency conversion units is larger and / or the total power is higher, if the normal frequency conversion units are cut in together, the probability of large jitter is relatively large. At this time, the target threshold is set smaller, that is, the enabling of the belt jitter analysis model is set to high sensitivity; conversely, the target threshold is set larger, that is, the enabling of the belt jitter analysis model is set to low sensitivity.

[0059] Optionally, using the belt jitter analysis model to perform jitter prediction analysis on the first load information, and obtaining multiple cut-in planning information of several normal frequency conversion units, including:

[0060] Obtain the load history record of the long-distance transmission belt in the recent period, calculate the average load fluctuation amplitude according to the load history record, and determine the target quantity according to the average load fluctuation amplitude;

[0061] Input the first rated parameters of each faulty frequency conversion unit, the second rated parameters of each normal frequency conversion unit, the first load information, and the target quantity into the belt jitter analysis model, and obtain multiple cut-in planning information corresponding to the target quantity analyzed by the belt jitter analysis model.

[0062] In this embodiment, first, obtain the load history record of the long-distance transmission belt in the recent period, such as within one hour, within half an hour, etc. The load history record contains the load fluctuation data of the long-distance transmission belt. By statistically analyzing all the load fluctuation data, the average load fluctuation amplitude can be obtained. The average load fluctuation amplitude characterizes the "continuity" of the goods transported by the long-distance belt in the recent period. For example, if the transported goods are small items, the average load fluctuation amplitude is very small and the corresponding "continuity" is high. If the transported goods are of a mixed type, the random switching of large and small items will cause the average load fluctuation amplitude to increase and the corresponding "continuity" to decrease.

[0063] Based on the average load fluctuation amplitude, further determine the target quantity. Since the larger the average load fluctuation amplitude, the more likely the second load information of the goods subsequently input into the belt for transmission will cause the drive system to be overloaded. At this time, the belt jitter analysis model needs to predict more cut-in planning information to increase the probability of screening out suitable and available target cut-in planning information; conversely, fewer cut-in planning information needs to be predicted by the belt jitter analysis model, which can reduce the calculation load and improve the analysis rate of the model.

[0064] Next, input the first rated parameters of each faulty frequency conversion unit (such as key parameters such as the rated power and rated current of the faulty frequency conversion unit), the second rated parameters of each normal frequency conversion unit (also including the rated power and rated current of the normal frequency conversion unit), the first load information (that is, the detailed information of the existing load on the long-distance transmission belt, such as load weight, distribution, etc.), and the previously determined target quantity into the belt jitter analysis model together. Under the constraint or guidance of the target quantity, the belt jitter analysis model predicts and outputs multiple cut-in planning information corresponding to the target quantity.

[0065] The belt jitter analysis model of the present invention is preferably constructed using CNN or Transformer, and the training data of the model is sorted out from the measured historical data of the normal frequency conversion unit of the long-distance belt transmission system during hot switching. Typically, the training data includes belt operation state data (belt speed, acceleration), real-time load information (total weight of goods, distribution of goods, such as stacking or uniform distribution), operating parameters of the normal frequency conversion units in use (output voltage, current, frequency, etc. of each frequency conversion unit), rated parameters of the faulty frequency conversion units that are cut out (such as key parameters such as rated power and rated current of the faulty frequency conversion unit), as well as the switching-in planning information set manually or simulated, and the jitter quality label corresponding to the switching-in planning information. Among them, the jitter quality label is used to characterize the measured jitter magnitude when the switching-in planning information is put into use. The smaller the jitter, the better the information represented by the corresponding jitter quality label, and vice versa. The jitter quality label indicates the training direction during the training process of the belt jitter analysis model. The belt jitter analysis model can adopt the conventional local training method. When the training data is insufficient, a distributed training method based on the consortium chain can also be considered. The present invention does not make specific limitations on this.

[0066] In addition, the belt jitter analysis model may include a first model and a second model. The first model is used to generate all possible switching-in planning information, and the second model is used to evaluate each switching-in planning information based on the first rated parameters of each faulty frequency conversion unit, the second rated parameters of each normal frequency conversion unit, and the first load information, and output several switching-in planning information with the top evaluation results. At this time, the training of the belt jitter analysis model described above is the training of the second model. And when the second model evaluates each switching-in planning information, the belt operation state data is a default fixed value, and this fixed value is the belt speed and acceleration set manually for the long-distance transmission belt.

[0067] Optionally, the overload analysis of each of the switching-in planning information using the second load information and screening out the target switching-in planning information includes:

[0068] Analyze the predicted second load weight input to the long-distance transmission belt during the target switching-in period from the second load information, and perform overload analysis on each switching-in sub-period in each of the switching-in planning information according to the second load weight, the preset transmission completion weight, and the first load weight; where the first load weight is analyzed from the first load information.

[0069] Determine the switching-in planning information with the lowest total overload power of all switching-in sub-periods as the target switching-in planning information.

[0070] In this embodiment, another short-distance conveyor belt or a goods-dumping machine is arranged at the front end of the long-distance conveyor belt, and a weight sensor is arranged below the conveyor belt of the short-distance conveyor belt or the goods-dumping machine, so that the second load weight can be obtained. Similarly, the first load weight of the long-distance conveyor belt can be obtained. Among them, the second load weight is the total weight newly conveyed onto the long-distance conveyor belt during the switching-in period corresponding to the sequential hot switching-in of the predicted normal frequency conversion units one by one. The preset transmission completion weight refers to the total weight of the goods on the long-distance conveyor belt that are conveyed out of the conveyor belt at the other end during this period. Calculate the second load weight + the first load weight - the preset transmission completion weight, and the actual total weight of the goods on the long-distance conveyor belt during the switching-in period can be obtained.

[0071] According to the actual total weight of the goods, the total power required for the drive system of the long-distance conveyor belt to maintain the current transmission speed can be converted. Then, divide the total power by the number of frequency conversion units to obtain the average power. If the average power is higher than the rated power of any frequency conversion unit (the existing frequency conversion units and the newly switched-in frequency conversion units), it is determined that the switching-in sub-period corresponding to the switching-in period (the switching-in moment of the normal frequency conversion unit divides the switching-in period into multiple switching-in sub-periods) is overloaded. In this way, the overload analysis of all the switching-in sub-periods in the switching-in period corresponding to each switching-in planning information is completed. Finally, the switching-in planning information with the lowest total overload power of all the switching-in sub-periods is determined as the target switching-in planning information.

[0072] Among them, the minimum total power of the drive system of the long-distance conveyor belt under different operating speeds and total weights of the goods can be measured in advance and made into comparison data. Subsequently, the above total power can be determined by querying the comparison data according to the actual total weight of the goods.

[0073] As Figure 3 shown, an embodiment of the present invention also discloses a stable control system for a long-distance conveyor belt. The system includes at least one processor and a memory. The processor calls and executes the computer program code stored in the memory to implement the following steps:

[0074] In the case where a faulty frequency conversion unit needs to be cut out, determine a number of normal frequency conversion units to be replaced;

[0075] Obtain the first load information and the second load information of the long-distance conveyor belt, and use the belt jitter analysis model to perform jitter prediction analysis on the first load information to obtain multiple switching-in planning information of a number of normal frequency conversion units. The switching-in planning information includes the switching-in sequence and switching-in interval of each normal frequency conversion unit. Among them, the first load information is the load information of the existing load on the long-distance conveyor belt, and the second load information is the load information of the newly added load on the long-distance conveyor belt during the process of switching in a number of normal frequency conversion units;

[0076] Perform overload analysis on each of the cut-in planning information using the second load information, screen out the target cut-in planning information, and control each of the normal frequency conversion units to gradually perform hot cut-in according to the target cut-in planning information to replace each faulty frequency conversion unit.

[0077] An embodiment of the present invention also discloses an electronic device, including: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, where the processor is configured to execute the computer program to implement the method as described in any one of the previous items.

[0078] An embodiment of the present invention also discloses a computer storage medium storing a computer program, where the computer program can be executed by a processor to implement the method as described in any one of the previous items.

[0079] An embodiment of the present invention also discloses a computer program product containing computer code, where the computer code can be executed by a processor of an electronic device to implement the method as described in any one of the previous items.

[0080] Those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program code executable by the computing device, so that they can be stored in a storage device and executed by the computing device, or they can be separately fabricated into individual integrated circuit modules, or multiple of them can be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

[0081] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stable control method for a long-distance conveyor belt, characterized in that: The method comprises: When a faulty frequency conversion unit needs to be switched out, determine a number of normal frequency conversion units to replace; Obtain first load information and second load information of a long-distance transmission belt, use a belt jitter analysis model to perform jitter prediction analysis on the first load information, and obtain multiple cut-in planning information of a number of normal frequency conversion units, wherein the cut-in planning information includes a cut-in sequence and a cut-in interval of each normal frequency conversion unit; wherein the first load information is the load information of the existing load on the long-distance transmission belt, and the second load information is the load information of the newly added load on the long-distance transmission belt during the process of cutting in a number of normal frequency conversion units; The second load information is used to perform overload analysis on each of the switching planning information, and target switching planning information is screened to obtain the target switching planning information, and each of the normal frequency conversion units is controlled to be gradually hot-switched in according to the target switching planning information to replace each faulty frequency conversion unit.

2. The method for stabilizing a long-distance conveyor belt according to claim 1, characterized in that: The determining of the number of normal frequency conversion units to be replaced includes: When a faulty frequency conversion unit needs to be switched out, all frequency conversion units in standby state are scanned to determine frequency conversion units in normal working state and with rated parameters closest to the faulty frequency conversion unit, and these frequency conversion units are determined as several normal frequency conversion units for replacement.

3. A stable control method for a long distance conveyor belt according to claim 2, characterized in that: The using the belt jitter analysis model to perform jitter prediction analysis on the first load information includes: The first load information is parsed and it is determined whether the cargo center of gravity height information is obtained. If the cargo center of gravity height information is higher than the target threshold, the belt jitter analysis model is used to perform jitter prediction analysis on the first load information. Otherwise, the belt jitter analysis model is not used to perform jitter prediction analysis on the first load information.

4. The method for controlling the stability of a long-distance conveyor belt according to claim 3, characterized in that: The belt jitter analysis model is used to perform jitter prediction analysis on the first load information to obtain multiple cut-in planning information of a number of normal frequency conversion units, including: Obtaining the load history of the long-distance conveyor belt in a recent period, calculating the average load fluctuation range according to the load history, and determining the target quantity according to the average load fluctuation range; The first rated parameters of each faulty frequency conversion unit, the second rated parameters of each normal frequency conversion unit, the first load information and the target quantity are input into the belt jitter analysis model to obtain multiple entry planning information corresponding to the target quantity analyzed by the belt jitter analysis model.

5. A stable control method for a long-distance conveyor belt according to claim 4, characterized in that: The using the second load information to perform overload analysis on each of the cut-in planning information to filter out target cut-in planning information includes: The predicted second load weight to be put on the long-distance conveyor belt during the target cut-in period is parsed from the second load information, and an overload analysis is performed on each cut-in sub-period in each cut-in planning information according to the second load weight, the preset transmission completion weight, and the first load weight; wherein the first load weight is parsed from the first load information; the cut-in planning information with the lowest total overload power of all cut-in sub-periods is determined as the target cut-in planning information.

6. A stable control system for a long-distance conveyor belt, characterized in that: The system includes at least one processor and a memory, wherein the processor calls and executes a computer program code stored in the memory to implement the following steps: When a faulty frequency conversion unit needs to be switched out, determine a number of normal frequency conversion units to replace; Obtain first load information and second load information of a long-distance transmission belt, use a belt jitter analysis model to perform jitter prediction analysis on the first load information, and obtain multiple cut-in planning information of a number of normal frequency conversion units, wherein the cut-in planning information includes a cut-in sequence and a cut-in interval of each normal frequency conversion unit; wherein the first load information is the load information of the existing load on the long-distance transmission belt, and the second load information is the load information of the newly added load on the long-distance transmission belt during the process of cutting in a number of normal frequency conversion units; The second load information is used to perform overload analysis on each of the switching planning information, and target switching planning information is screened to obtain the target switching planning information, and each of the normal frequency conversion units is controlled to be gradually hot-switched in according to the target switching planning information to replace each faulty frequency conversion unit.

7. A long distance conveyor belt stability control system according to claim 6, characterized in that: The determining of the number of normal frequency conversion units to be replaced includes: When a faulty frequency conversion unit needs to be switched out, all frequency conversion units in standby state are scanned to determine frequency conversion units in normal working state and with rated parameters closest to the faulty frequency conversion unit, and these frequency conversion units are determined as several normal frequency conversion units for replacement.

8. An electronic device, characterized in that: include: At least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, wherein the processor is configured to execute the computer program to implement the method according to any one of claims 1 to 5.

9. A computer storage medium, characterized in that: The computer storage medium stores a computer program, and the computer program can be executed by a processor to implement the method according to any one of claims 1 to 5.

10. A computer program product, characterized in that: The computer program product includes computer codes, and the computer codes can be executed by a processor of an electronic device to implement the method according to any one of claims 1 to 5.

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