CN113998357A - A dual stacker scheduling method and storage medium for a storage system for filter rod storage in a cigarette factory - Google Patents
A dual stacker scheduling method and storage medium for a storage system for filter rod storage in a cigarette factory Download PDFInfo
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- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000003860 storage Methods 0.000 title claims abstract description 20
- 230000009977 dual effect Effects 0.000 title description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 25
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- 238000004590 computer program Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/0407—Storage devices mechanical using stacker cranes
- B65G1/0421—Storage devices mechanical using stacker cranes with control for stacker crane operations
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Abstract
本发明公开了一种卷烟厂滤棒库仓储系统双堆垛机调度方法及存储介质，其中，方法包括：确定最晚开始时间步骤、优先级划分步骤、排序步骤、确定空跑距离步骤、时空模型构建步骤和任务下达步骤；通过机台生产计划、机台消耗速度、堆垛机使用情况、现有任务信息池、设备运行状态等数据建立时空模型，并基于该模型控制堆垛机运行，充分考虑了同一轨道内两台堆垛机的三维运行空间，根据时空模型合理安排某一台堆垛机执行任务，既做到了同一时间内两台堆垛机任务在空间内不交叉，又有效减少了堆垛机任务的平均移动距离、空跑距离和任务时间，实现了灵活、柔性的提高堆垛机运行效率，降低了使用能耗，提高了智能化程度。
The invention discloses a dual-stacker scheduling method and a storage medium for a filter rod warehouse storage system in a cigarette factory, wherein the method includes: a step of determining the latest start time, a step of prioritizing a priority, a step of sorting, a step of determining an empty running distance, a time-space step Model building steps and task assignment steps; establish a spatiotemporal model based on data such as machine production plan, machine consumption speed, stacker usage, existing task information pool, equipment operation status, etc., and control the operation of the stacker based on the model. The three-dimensional operation space of two stackers in the same track is fully considered, and a certain stacker is reasonably arranged to perform tasks according to the space-time model, so that the tasks of the two stackers do not overlap in space at the same time, and it is effective The average moving distance, empty running distance and task time of the stacker task are reduced, and the operation efficiency of the stacker is improved flexibly and flexibly, the energy consumption is reduced, and the degree of intelligence is improved.
Description
Technical Field
The invention relates to the technical field of filter stick warehouse storage in a cigarette factory, in particular to a double-stacker dispatching method and a storage medium of a filter stick warehouse storage system in a cigarette factory.
Background
The traditional three-dimensional warehousing system generally comprises an information system managed by a computer and a stacker control system managed by a PLC. Typically, the order in which the stacker tasks are executed is in accordance with the order in which the tasks are issued by the computer system. When a warehousing system is applied to a filter rod warehouse in a cigarette factory, two stackers on the same track respectively execute tasks in respective areas, the dispatching of the stackers needs to consider the data of materials required by production of a wrapping machine table, a launching machine table and the like, production beat, time requirement of material requirement, time requirement of material shortage, time requirement of material blockage and the like in the production process, the data are generally transmitted by a computer system through an interface, a control system of the stackers cannot effectively adjust the execution sequence of the tasks, and the condition that the machine table is broken due to the fact that a certain set of tasks are not executed for a long time is easy to occur; in addition, if the production task is greatly increased, the original design capability redundancy cannot meet the requirement, the material breaking condition is often caused, and the production rhythm is influenced. Therefore, it is urgently needed to find a reasonable method for scheduling the stacker so as to improve the composite operation efficiency of the stacker.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a filter rod warehouse one-rail double-stacker dispatching method for realizing goods transportation in a reasonable operation time and a material transportation and traveling three-dimensional space for a filter rod warehouse one-rail double-stacker in a cigarette factory.
According to a first aspect, the invention provides a dual stacker scheduling method for a filter rod storage system in a cigarette factory, comprising the following steps:
determining the latest starting time step: determining the latest starting time of each task according to the machine station material breaking time and the stacker movement parameters;
a priority classification step: dividing task priorities according to the latest starting time;
a sorting step: sequencing the tasks according to the task priority to obtain an overall queue, and listing all sequencing conditions of the overall queue;
determining an empty running distance: determining empty running distances of the pilers under all sequencing conditions of the whole queue;
and (3) constructing a space-time model: arranging all sequencing conditions of the whole queue according to the empty running distance of the stacker, wherein the shorter the empty running distance is, the farther the empty running distance is, then constructing a space-time model according to the arranged sequence, judging whether the constructed space-time model meets the selection requirement, and if the constructed space-time model meets the selection requirement, selecting the space-time model; if not, selecting the next arrangement to construct a space-time model; if all the space-time models are not satisfied, selecting the space-time model with the shortest idle running distance;
a task assigning step: and based on the selected space-time model, sequentially assigning tasks in the space-time model to a stacker.
Further, the determining the latest start time step includes:
determining the material breaking time of a machine table; the machine station material breaking time comprises a forming machine material breaking time or an emitter material breaking time;
determining the time required by the stacker to complete the task;
the latest starting time of each task is not less than the sum of the machine station material-breaking time, the time required by the stacker to complete the task and the time generated by the task.
Further, the material breaking time TC of the forming machine is CH/CN;
the transmitter material-breaking time TF is FH/FN;
wherein: CH is the number of the filter stick lattices cached after the forming machine applies for tray discharge; CN is the production capacity of the forming machine corresponding to the brand of the work order; FH is the number of the filter stick lattices cached after the transmitter applies for the tray discharge; FN is the sum of the production capacity of cigarette making machines corresponding to all pipelines of the transmitter.
Further, the air conditioner is provided with a fan,
wherein, XiNumber of tubes in use, x, for No. i cigarette-making machinesiThe number of pipelines which are connected from a No. K pipeline of a transmitter in the pipeline in use of the No. i cigarette making machine, NiThe ability of the filter rod to be consumed by a cigarette machine number i.
Further, the time T (T) required by the stacker to complete the task is T1+t；
Wherein: t is1The movement time of the stacker; t is the time of stretching and retracting the fork of the stacker.
Further, when the task moving distance J is larger than or equal to the shortest distance BJ that the stacker accelerates from a standstill to the maximum speed and then reduces to the standstill, the moving time T of the stacker1Is composed of
Wherein s is the maximum running speed of the stacker;
when the task moving distance J is less than the shortest distance BJ between the stacker and the stationary stacker after accelerating from the stationary state to the maximum speed and then reducing to the stationary state, the moving time T of the stacker1Is composed of
Wherein a is the acceleration of the stacker during uniform acceleration motion; and b is the acceleration of the stacker during uniform deceleration movement.
Further, the prioritizing step comprises:
dividing tasks into manual tasks and system tasks; the manual tasks are classified into a manual queue, and the priority is second level;
judging whether the current time exceeds the latest starting time of the current system task, if so, classifying the system task into an emergency queue with the priority level as one level; if not, the queue is classified into a common queue, and the priority is three levels;
the sorting step includes:
respectively sequencing the tasks in the manual queue, the emergency queue and the common queue, and enumerating all sequencing conditions;
and sequencing the manual queue, the emergency queue and the common queue according to the sequence of the first-second-third priority levels to obtain an overall queue, and listing all sequencing conditions of the overall queue.
Further, the task assigning step includes:
sequentially issuing the tasks in the space-time model to a stacker, and if the tasks have matched tasks, issuing the tasks and the matched tasks to the stacker together;
and after all tasks assigned to the stacker begin to be executed, assigning new tasks to the stacker.
Further, after the spatio-temporal model is selected, if new task adding is detected, the step of determining the latest starting time is returned, and if no new task adding is detected, the step of assigning the task is executed.
According to a second aspect, the invention also provides a computer-readable storage medium having stored thereon a computer program executable by a processor for carrying out the steps of the method as described above.
Introduction of the working principle:
the goods shelf area is divided into three areas, in principle, two stackers on the same track are respectively responsible for 1 area and 2 areas, and the 3 areas are cooperatively responsible for the two stackers, so that the two stackers are prevented from colliding, and the car-giving time is reduced (when the two stackers are positioned at the edge of the middle area, the car-giving problem needs to be considered, and at the moment, a subsystem of one of the stackers gives the car according to the existing car-giving mode). When the pilers execute tasks in respective areas, the tasks are sequentially executed according to the sequence of the idle running distance from short to long, so that conflict is avoided, and the working efficiency is greatly improved.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the double-stacker scheduling method for the filter stick warehouse storage system in the cigarette factory, the space-time model is built through simulating the space and time data of the stackers, the task sequencing queue with the reasonable shortest idle running time is found, the two stacker tasks are not crossed in the space at the same time, the task distribution balance degrees of the two stackers are basically consistent, the composite operation efficiency of the stackers is improved, and the filter stick workshop is ensured not to be blocked and lack.
(2) The average moving distance, the idle running distance and the task time of the stacker task are effectively reduced, the overall operation time is shortened, the material breakage condition in the production process can be reduced, and meanwhile, the reduction of power consumption is facilitated.
Drawings
FIG. 1 is a sectional view of a filter rod bank;
FIG. 2 is a flow chart of a dual stacker scheduling method of a filter rod warehouse storage system in a cigarette factory according to the present invention;
FIG. 3 is a flowchart of a dual stacker scheduling method of a cigarette factory filter rod store system in embodiment 1;
FIG. 4 is a flowchart of spatio-temporal model construction steps in example 1;
fig. 5 is a flowchart of the task assigning step in embodiment 1.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
A forming machine: when the number of the buffered empty discs is less than a set value, the forming machine sends an empty disc ex-warehouse application to the computer system, the computer system generates an empty disc ex-warehouse task, and the stacker ex-warehouse the empty discs to an upper-layer platform of the forming machine. The forming machine puts the produced filter sticks into an empty tray and conveys the filter sticks to a lower layer platform, when the number of full trays reaches a set number, the forming machine sends full tray warehousing applications to the computer system, the computer system generates full tray warehousing tasks, and the stacker takes the full trays filled with the filter sticks away from the lower layer and warehouses the full trays.
A transmitter: when the number of the cached full discs is less than a set value, the transmitter sends a full disc ex-warehouse application to the computer system, the computer system generates a full disc ex-warehouse task, the stacker ex-warehouse the full discs to an upper platform of the transmitter, the transmitter transmits the filter rods to the cigarette making machine and conveys the empty discs to a lower platform, when the number of the empty discs reaches the set number, the transmitter sends an empty disc in-warehouse application to the computer system, the computer system generates an empty disc in-warehouse task, and the stacker takes the empty discs away from the lower platform for warehousing.
Material breaking time: the amount of buffering set when the forming machine or transmitter requests out-of-bank can support the reproduction time.
The empty running distance: the distance between the current position of the stacker and the start of the task to be executed.
Pairing tasks: the tasks which need to be completed together are that the warehousing application of the same machine is accompanied every time of the ex-warehouse application of the production business of the filter rod warehouse, and the end point column of ex-warehouse and the starting point column of warehousing are listed as the same column.
Example 1
As shown in fig. 1, the shelf area is divided into three areas, namely, 1 area, 2 areas and 3 areas, in principle, two stackers on the same track are responsible for the 1 area, one stacker is responsible for the 2 area, and the 3 areas are cooperatively responsible for the two stackers. The two stackers on the same rail are respectively dispatched according to the double-stacker dispatching method of the filter stick warehouse storage system of the cigarette factory. Specifically, the scheduling method comprises the following steps:
determining the latest starting time step: and determining the latest starting time of each task according to the machine station material breaking time and the stacker movement parameters.
Specifically, firstly, determining the machine material breakage time:
the machine station material breaking time comprises the following steps: material breaking time of a forming machine and material breaking time of an emitter. The material breaking time TC of the forming machine is CH/CN; and the material breaking time TF of the transmitter is FH/FN.
Wherein TC is the material breaking time of the forming machine; CH is the number of the filter stick lattices cached after the forming machine applies for tray discharge; CN is the production capacity of the forming machine corresponding to the brand of the work order; TF is the material-breaking time of the emitter; FH is the number of the filter stick lattices cached after the transmitter applies for the tray discharge; FN is the sum of the production capacity of cigarette making machines corresponding to all pipelines of the transmitter.
The sum FN of the production capacities of the cigarette making machines corresponding to all pipelines of the transmitter is:
wherein, XiNumber of tubes in use, x, for No. i cigarette-making machinesiThe number of pipelines which are connected from a No. K pipeline of a transmitter in the pipeline in use of the No. i cigarette making machine, NiThe ability of the filter rod to be consumed by a cigarette machine number i.
Then determining the time T required by the stacker to complete the task:
T＝T1+t
wherein, T1The movement time of the stacker; t is the time of stretching and retracting the fork of the stacker.
When the task moving distance J is greater than or equal to the shortest distance BJ between the stacker and the stationary stacker after accelerating from the stationary state to the maximum speed and then reducing to the stationary state, the moving time T of the stacker1Is composed of
Wherein s is the maximum running speed of the stacker;
a is the acceleration of the stacker during uniform acceleration movement; b is the stacker making uniform decelerationAcceleration in exercise, J ═ a-B | × d; a is a task starting point column, B is a task ending point column, and d is a cargo space width.
When the task moving distance J is less than the shortest distance BJ between the stacker and the stationary stacker after accelerating from the stationary state to the maximum speed and then reducing to the stationary state, the moving time T of the stacker1Is composed of
And finally, obtaining the latest starting time TZ through the material breaking time TC or TF, the time T required by the stacker to finish the task and the time TS generated by the task:
TZ is TC + TS + T + TT or TZ is TF + TS + T + TT
TT is a short time which is properly advanced to ensure the safe operation of the system.
A priority classification step: and dividing the task priority according to the latest starting time TZ. Namely:
dividing tasks into manual tasks and system tasks; and (4) dividing the manual tasks into manual queues with the priority of two levels. Then judging whether the current time exceeds the latest starting time of the current system task, if so, classifying the system task into an emergency queue with the priority level as one level; if not, the queue is classified into a common queue, and the priority is three levels.
A sorting step: and sequencing the tasks according to the task priority to obtain an overall queue, and listing all sequencing conditions of the overall queue. Namely:
respectively sequencing the tasks in the manual queue, the emergency queue and the common queue, and enumerating all sequencing conditions; then the manual queue, the emergency queue and the common queue are sequenced according to the sequence of the first level, the second level and the third level of the priority, an integral queue is obtained, and all sequencing conditions of the integral queue are listed in parallel.
Determining an empty running distance: determining empty running distances of the pilers under all sequencing conditions of the whole queue;
and (3) constructing a space-time model: arranging all sequencing conditions of the whole queue according to the empty running distance of the stacker, wherein the shorter the empty running distance is, the farther the empty running distance is, then constructing a space-time model according to the arranged sequence, judging whether the constructed space-time model meets the selection requirement, and if the constructed space-time model meets the selection requirement, selecting the space-time model; if not, selecting the next arrangement to construct a space-time model; and if all the space-time models are not satisfied, selecting the space-time model with the shortest idle running distance.
And after the spatio-temporal model is selected, if new task addition is detected, returning to the step of determining the latest starting time, and if no new task addition is detected, executing the step of task assignment.
A task assigning step: the tasks in the space-time model are assigned to the stacker in sequence, if the tasks are matched, the tasks and the matched tasks are assigned to the stacker together, and after all the tasks to be assigned to the stacker start to be executed, new tasks are assigned to the stacker so as to reduce the time for assigning task interfaces and improve the efficiency.
By adopting the double-stacker dispatching method of the filter stick warehouse storage system of the cigarette factory in the respective areas of the two stackers on the same rail, the purposes of no conflict, less vehicle yield and less idle running are achieved as far as possible, and the working efficiency is greatly improved.
The operational data before and after the application of the dual stacker scheduling method of the filter rod warehouse storage system of the cigarette factory provided in example 1 are compared as shown in the following table. The application provides a double-stacker dispatching method for a cigarette factory filter stick warehouse storage system, which effectively reduces the average moving distance and the task time of the stacker task, thereby reducing the condition of material breakage in the production process, simultaneously reducing the idle running distance, helping to reduce the power consumption and simultaneously shortening the whole operation time.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
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