JPH0489708A - Optimum conveyance control device for raw material yard - Google Patents

Abstract

PURPOSE:To make the planning for an amount per one shift possible in a short time by reasoning repeatedly the amount per day in succession to the amount per one pile, and deciding a conveyance operation plan with every loader accord ing to a knowledge object and an operational knowledge of experts including data on a pile blending plan, the present condition and the transition of a yard. CONSTITUTION:When a pile blending plan and data on repairing conditions for a conveyor or a mobile machine are inputted from an input means 10, an operation means 20 takes various data on a knowledge base in a file 22, an AI tool in a file 23, a knowledge object in a file 24 into a reasoning means 26. Then, a conveyance schedule for conveying an amount of one pile to a blast furnace and sintering plant is decided, and in succession, a conveyance schedule with every day is decided by means of reasoning so as to store it in a file 25. This process is repeated in order of specific brands, lump ore and fine ore so that a conveyance operation plan can be decided by means of reason ing.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optimal conveyance control device for a raw material yard, particularly a work plan for conveying auxiliary raw materials and pellets temporarily stored in a raw material yard to a blast furnace and sintering factory, and iron ore. An automatic system that automatically draws up a work plan for transporting stones to a betting yard using the operating knowledge of a skilled operator, and automatically starts and stops conveyors and moving machines without operator intervention according to the created transport work plan. Regarding control.

[Prior Art] A conventional method of formulating a conveyance work plan and a method of automatically starting and stopping a conveyor or a moving machine will be described below.

(1) How to formulate a transport work plan Here, the transport work plan relates to the transport of iron ore from the rough ore yard to the betteng yard, and the transport of auxiliary materials and pellets from the rough ore yard to the blast furnace and sintering plant. Refers to work schedule. Generally, iron ore temporarily stored in a rough ore yard is
During free time while transporting auxiliary materials to the blast furnace and sintering tank, they are transported according to a transport work plan drawn up based on the pile mix plan and the yard location of each brand, etc., and are stacked in strips to ensure uniform quality. This mountain is called a pile. Furthermore, it takes about eight days from the start to the completion of pile loading, and this period is called the pile cycle.

Conventionally, there have been the following problems in formulating this transportation work plan, and it has been difficult to plan one shift at a frequency of once/shift according to the operating experience of a skilled operator.

(a) It was difficult to quantitatively evaluate the following characteristics of the transport work and quickly formulate a transport plan.

(a-1) There are piles of lump ore and coarse ore in the pile, each about 8
After being loaded for days, the lump ore is delivered to the blast furnace and the crude ore to the sintering plant over about 9 days.

(a-2) The loading line for lump ore and rough ore shares the line for discharging auxiliary raw materials and pellets to the blast furnace and sintering plant.

(a-3) Unloading work from Perth to the rough ore yard using a stacker and unloading work from the rough ore yard using a loader.
The loader cannot dispense from the position where the stacker and loader compete.

(a-4) In order to make the pile uniform in quality, even the same brand is stacked in multiple batches. In addition, there are restrictions on the maximum amount of brands to be loaded at one time, the time until the same brand can be loaded again, etc.

(a-5) Since special brands have a large impact on quality, the single payout amount and payout timing are limited and stacked in the betting yard.

(a-8) In order to deal with sudden breakdowns, priority is given to unloading work from the rough ore yard using loaders with a high workload (loaders with a large amount of future loading scheduled within the pile cycle). do. Other than that, they are summed within the stacker's capabilities.

(b) Planning of a transportation work plan mainly depends on experiential knowledge, and the degree of freedom of the transportation line is large, so it has been difficult to systemize it using conventional technology.

(2) Methods for starting and stopping conveyors and moving machines Conventionally, there have been three levels of methods for starting and stopping conveyors and moving machines.

・Level A: Method of starting and stopping by commands from a process computer ・Level B: PLC (programmable controller),
Method of starting and stopping according to commands from DDC (digital control device) Level C: Method of starting and stopping individually FIG. 11 is a block diagram showing an example of the configuration of a raw material yard conveyance control device.

Here, (50) is a monitoring operation device as an operator interface of the computer, (51) is a process computer that monitors the amount of passage, etc., and notifies the operator and start/stop notifications to lower-level control devices, and (52) is a conveyor control device. a monitoring and operating device as an operator interface (used when the monitoring and operating device (50) is not used) of a control device of a mobile device;
(53) is a conveyor/mobile device control device for sequentially controlling the conveyor or mobile device, (54) is a weighing machine as a passing amount measuring device that measures the amount of passing material, and (55) is a conveyor for conveying raw materials. , (56) are mobile machines (loaders, stackers, etc.) that unload and stack raw materials.

(1) Method of starting and stopping based on commands from a process computer (Level A); This method is the most systematized method of starting and stopping conveyors and mobile devices in the prior art.

The operator monitors the operating status of the conveyor and mobile equipment by the process computer (51) using the monitoring and operating device (50), and based on his/her operational experience, manually creates a raw material transportation work plan (work start/completion times, For each task (conveyance amount, conveyance system, etc.), setting of the task and instructions to start and stop the conveyor (55) and moving machine (56) are performed via the monitoring and operating device (50).

FIG. 12 is a flowchart showing the operation at level A.

a. The operator sets the next work on the operator interface and instructs the process computer (51) to select a candidate for the conveyance line.

b. The process computer (51) selects and determines possible transport lines based on the operating status of the conveyor (55) and mobile device (56) that are managed in real time, and displays them on the operator interface. .

C. After viewing the operator interface and selecting one transport line from among multiple candidates, the operator may issue a startup instruction to the process computer (51).
Request a check to see if it is OK (OK) or not (NG).

d. The process computer (51) determines whether it is OK (OK) to issue a startup instruction to the conveyor group included in the conveyor line.
NG), the conveyor/mobile device control device (53) is requested to check.

e. The results checked by the conveyor/mobile device control device (53) are notified to the process computer (51).

f. The results notified to the process computer (51) are displayed on the operator interface.

g. The operator checks the displayed result, and if the checked result is NG, either waits until it becomes OK or cancels and starts over from the beginning (a).

h. If the startup conditions are OK, issue a startup command via the operator interface.

i. The start command is notified to the conveyor/mobile device control device (53) via the process computer (51), and the conveyor (55) and mobile device (5B) are controlled by the sequence control function of the conveyor/mobile device control device (53). Start in sequence.

j. The process computer (51) manages the operating status of the conveyor (55) and the mobile machine (5B) based on a start signal from the conveyor/mobile machine control device (53). You can also use a weighing machine (
54) to monitor the conveyance amount.

k. Monitoring results by the process computer (51) are displayed on the operator interface at any time.

l. When the conveyance amount exceeds the target amount, the process computer (51) notifies the operator via the operator interface.

m, the operator confirms that the target amount has been exceeded.

n. The operator issues a command to finish the current work (instruction to stop the conveyor or mobile machine) via the operator interface.

0, the command is sent to the conveyor via the process computer (51)
The mobile device control device (53) is notified and the conveyor (55)
and the mobile device (56) are sequentially stopped, and the conveyance results are recorded and managed.

In this method, the operator must set each task one by one, and then issue start/stop commands to the conveyor (55) and moving machine (56) via the process computer (51). In addition, the operator is always on the conveyor (55) and mobile machine (56).
), it is necessary to monitor the operating status and transport status of the machine, which places a high workload on the operator.

(2) Method of starting and stopping by commands from PLO and DDC (Level B); Figure 13 shows how to start and stop by commands from the conveyor/mobile device control device (53), which is a lower-level control device (PLC, DDC).
It is a flowchart which shows the method of stopping.

a. The operator constantly monitors the operating status of the conveyor (55) and mobile device (56), and controls the conveyor and mobile device control device ff.
Work settings are made using the operator interface (53).

b. The conveyor/mobile device control device (53) checks the startup conditions and displays the set system in different colors on the operator interface.

C. If the result is good, the operator instructs the conveyor/mobile device control device (53) to start.

d. The conveyor/mobile device control device (53) is connected to the conveyor (5
5) and the mobile device (56) are activated in sequence.

e. The operator constantly monitors the transportation amount ascertained by the weighing machine (54).

f. When the operator determines that the transport amount exceeds the target value, he issues a stop instruction to the conveyor/mobile device control device (53).

g. The conveyor/mobile device control device (53) is the conveyor (5
5) and the mobile device (56) are stopped in sequence.

These operations require more operator intervention than level A, and work efficiency is significantly reduced.

(3) Method of starting and stopping individually (Level C) This method starts and stops the conveyor (55) and moving machine (56) one by one, and the workability is too poor. It is used only to check the operation of the machine after repair, and is not used for normal transportation work.

[Problems to be Solved by the Invention] Conventionally, control was performed using the method described above, which caused the following problems.

(1) There is a large degree of freedom in the brands to be transported and the transport line, and the transport work plan is developed through trial and error using advanced operational experience (knowledge), so a huge amount of time is required and planning is done manually. This method takes into account various conditions and creates a transport work plan for one pile (
(about 8 days) could not be made. In addition, with the manual planning method, it is impossible to learn the transport efficiency based on the transport performance of each loader brand, and it is only possible to draw up a work plan for just one shift.

(2) Conventionally, it was impossible to register transport work as a work detail in advance, and it was necessary to wait for the completion of the current work before setting the next work. For this reason, the operator was required to constantly monitor the work status, resulting in very poor work efficiency.

(3) Furthermore, since there is no function for making time reservations or system reservations in advance, starting and stopping the conveyor and mobile equipment all depend on operator operations, and workability was poor in this aspect as well.

In this way, conventionally, based on the operator's advanced operating experience, it took about an hour to make a direct cut, and then one shift (7 to 9 hours) was completed.
A transport work plan was being drawn up.

Furthermore, the operator was required to set each job one by one according to this transportation work plan while constantly monitoring the transportation status of the raw materials. For this reason, there has been a strong demand for systematization of transport work planning and work setting functions, but this has not been possible due to the following problems.

(1) Experiential knowledge is the main thing, and it is difficult to describe knowledge using conventional programming methods.

(2) There are many combinations of brands to be transported and transport lines, and there is too much freedom. For this reason, methods such as linear programming take too much time to calculate, making it impossible to find an optimal solution.

(3) Pile mix plan used to formulate a transportation work plan;
The accuracy of data such as the current status and trends of the yard, cargo handling status and future plans in Perth, and transport efficiency by loader brand is not good. For this reason, it was not possible to create an optimal conveyance work plan for a long period of time (one pile).

(4) Conventional transport work plans are drawn up manually, so it is troublesome to register transport work as work details in terms of workability.If we were to add time reservation and system reservation functions, there would be no need for operator intervention. Although it was possible to start and stop conveyors and moving machines, the effect in terms of labor savings was small.

This invention was made in view of this situation,
The advanced operational knowledge of experienced operators regarding transportation work plans is converted into a knowledge base, which enables the standardization and transfer of technology, enables quick response to operational changes, and improves the transportation efficiency by loader brand. In order to optimize the plan and automatically start and stop the conveyor and moving equipment, the created transport work plan can be registered as work details, and operators can make time reservations and system reservations. The purpose of the present invention is to provide an optimal conveyance control device for a raw material yard that makes it possible to automatically start and stop conveyors and moving machines without any intervention.

[Means for Solving the Problems] The optimum conveyance control device for a raw material yard according to the present invention changes the work plan for conveying the raw materials temporarily stored in the yard to a pile mixing plan, a blast furnace ore tank and a sinter tank that change from time to time. In the optimal conveyance control system for raw material yards, which automatically starts and stops conveyors and moving machines based on changes in inventory levels, etc., the current status data of the yard (e.g. brand, inventory amount, position, and delivery direction) is used. , pile mix plan data (e.g. pile period, pile components, mix amount by brand, and loading start date), repair plan data (e.g. repair start and completion dates and times), loader transport efficiency by brand, blast furnace Based on a knowledge object containing each data of sintering factory operation plan data (for example, production amount, usage amount, properties, and down time) and product name data (brand, component), each data of the knowledge object and the operation knowledge base. , a reasoning means for drawing up a transport work plan that maximizes transport efficiency, registering the created transport work plan as a work detail, and reserving time for each system (when the time comes, stop the current work and start the next work) ) and system reservations (stop the current operation and start the next operation when the scheduled amount of transportation is completed), time reservations and system reservations to automatically control lower systems, conveyors, and mobile equipment. boot·
It has a control means for instructing a stop, and a learning means for calculating the transport efficiency based on the transport performance by brand of the loader and updating the data in the transport efficiency file for each brand of the loader.

[Function] In this invention, the pile mixing plan, the current status and transition of the yard, the cargo handling status and future schedule of the Perth, the conveyance efficiency by brand of loader, the repair plan of conveyors and moving machines, the operation of blast furnaces and sintering plants, etc. Based on knowledge objects created based on data such as plans and the advanced operational knowledge base of skilled operators, a transport work plan for one byte of auxiliary materials and pellets is first drawn up, and then it is planned on a daily basis. Inference is repeatedly made in the order of special brand, lump ore, and coarse ore, and a transport work plan for one pile is determined for each loader, transport line, and stacker, for example.

The results are automatically registered as work details.

Further, the operator makes a time reservation or system reservation for the work details registered for each transport line.

On the other hand, the computer constantly monitors the conveyance status, and when the scheduled time has arrived and the scheduled amount of conveyance has been completed, it automatically tells the conveyor or moving machine to finish the current work and send the next one without operator intervention. Outputs start/stop instructions necessary to start work to lower systems.

Furthermore, when one pile's worth of stowage is completed, the transport efficiency for each loader brand is calculated based on the transport results, and is used as a condition for formulating the next transport work plan.

Embodiment FIG. 1 is a block diagram showing the configuration of a transport work planning device 5 in an optimal transport control system for a material yard according to an embodiment of the present invention. (10) is an input means for inputting data such as a pile mixing plan, repair conditions for conveyors and mobile machines, and (20) is a calculation means. (2
1) is the I/P buffer of the calculation means (20), (22) is the file in which the knowledge base is stored, and (23) is the AI
A file in which tools are stored, (24) a file in which various data such as knowledge objects described below are stored, and (25) a file related to transportation schedules for auxiliary raw materials/pellets, special brands, lump ore, rough ore, etc. The file (2B) in which data is stored is an inference means.

This inference means (26>) includes the knowledge base of file (22), the AI tool of file (23) and the file (24).
) is used to determine the schedule for transporting one pile of auxiliary materials and pellets to the blast furnace and sintering plant, and then schedules the transportation of special brands, lump ore, coarse ore, etc. on a daily basis. Inference is made to determine the transport schedule (transport line, brand, transport amount, transport time, etc.) and file (25
).

FIG. 2 is a block diagram showing the configuration of a transport work management device in an optimal transport control system for a material yard according to an embodiment of the present invention. (30) Registers the transport work plan as work details (brand, transport amount, transport line, transport work start/completion time, etc.), and makes time reservations and system reservations for the work registered as work details. (31) is an operator interface (CRT screen) for registering a transport work plan created for each transport line using an ES (expert system), or a transport work plan created manually as a work detail. It is.

(32) is an operator interface (CRT screen) for making time reservations or system reservations for each transport line for the work registered as the work details. (38) is an operator interface (CRT screen) for constantly monitoring the progress of work. File (34) corresponds to file (25) in FIG. 1, and stores the transport work schedule planned by the ES. (35) is a work details file, in which a plurality of work details are stored for each transport line in order of transport work. (36) is a work progress management table in which the current work and next work are stored for each conveyance line, and the work status of the current work is constantly monitored based on signals from the conveyor/mobile machine control device. When making a reservation, at the reserved time,
When making a system reservation, when the transport amount of the current work reaches the target amount,
Outputs instructions to end the current work and start the next work (start/stop conveyors and mobile equipment) to the lower system.

Note that although FIGS. 1 and 2 conceptually illustrate each device, the hardware configuration is comprised of the monitoring and operating device (50) and process computer (51) shown in FIG. 11.

FIG. 3 is a flowchart showing the operation of the transport work planning device shown in FIG. First, as a prerequisite, one pile (approximately 8 days) worth of knowledge objects necessary for planning is created. Knowledge objects include pile mixing plan files, conveyor and moving equipment repair plan files, parse plan files, loader work efficiency files by brand, blast furnace
It is created from the sintering factory operation plan file and stored in the knowledge object file (24) (S61).

FIG. 4 is an explanatory diagram showing the contents of the knowledge object.

This knowledge object consists of a yard current status file that stores the current status and changes of the yard, a pile mix plan file that stores pile mix plan information, a repair plan file for conveyors and moving equipment that stores repair information, and a conveyor and transport equipment repair plan file that stores repair information. Transport efficiency file by brand of loader that stores efficiency information, Perth plan file that stores unloading status and future schedule in Perth, and blast furnace/sintering plant operation plan information. It consists of an operation plan file for the sintering factory, and product name masks containing brand names, ingredients, etc., and the contents of each are as shown in the diagram.

Once the knowledge object (24) is created, next, the knowledge object and the knowledge base (22) are used to make inferences.
The transport schedule for the auxiliary raw materials and pellets for the pile is determined (9B2). After that, the transportation schedule is estimated in the order of special brand, lump ore, and powdered iron per day, and the final decision is made.863
- 565), and finally checks the powdered iron component of the powder pile (88B), and if it does not meet the standard value, changes the transport brand (S67), and re-determines the powdered iron transport schedule (865). The above process is repeated (seg) until one pile is completed.

Next, a method of planning a transportation schedule for auxiliary raw materials, pellets, etc. will be explained in detail.

(1) Transportation schedule for auxiliary raw materials and pellets (S82)
; Operation plan of blast furnace and sintering plant, inventory of auxiliary raw materials and pellets in blast furnace ore tank and sintering tank Jit (A-ton) l full tank amount (B-ton), discharge amount (C-ton/hr) Based on this, the time (T) until the tank runs out of stock is calculated for each tank.

T=A/C (hr) Since the operation of blast furnace/sintering improvement is generally stable, it is basically carried out in a direct cut manner. In addition, the following points should be considered in order to prevent tank stock-outs and improve transport efficiency.

a. Prioritize and allocate tanks that have a short inventory time and are likely to run out of stock to prevent tanks from running out of stock.

b. When the same brand is in multiple tanks (for example, 2 blast furnaces and 5 blast furnaces), it is transported continuously to increase the transport efficiency.

Taking the above matters into account, inference is made using the knowledge base (22) and the knowledge object (24), and a transport work schedule for one pile is determined.

Here, the conveyance amount (Z) and the conveyance time (Ta) are the time from the current time until the completion of conveyance (Te), the payout efficiency of the loader (T
I) Since the conveyance amount is small at the start and completion of the conveyance work, in order to correct this, for example, as shown in FIG. 4, a margin time (α) is used for calculation.

Z −(B−A) +C*Te (ton/hr)
Ta = Z/T 1 +a (hr) (α=α1+
α2) In the above formula, the * mark means the sign of multiplication, and the same shall be treated in the following formulas.

Furthermore, when the time period for transporting auxiliary raw materials and pellets overlaps with the time period for repair, the conflict is canceled by shifting the time period for transporting the auxiliary materials/pellets to before the repair time in order to prevent stockouts.

(2) Conveyance schedule for special brands (S62) For the purpose of stabilizing the pile quality, we first calculate the number of conveyances and Calculate the loading amount per load.

Number of conveyances - Scheduled amount of stowage/Maximum amount of conveyance Amount of conveyance per time = Scheduled amount of stowage/Number of conveyances Here, upper and lower limits are set for the amount of conveyance, and the conveyance shall be carried out within these ranges. Surplus fractions of the planned amount are collected and stacked as a brand in the last transportation operation out of multiple operations. This treatment is common to transportation schedules for special brands as well as lump ore and coarse ore described below.

Next, the knowledge object (24) and the knowledge base (22
), and during the idle time of conveying auxiliary materials and pellets, the conveyance schedule (transfer line, conveyance period,
(conveyance period, conveyance amount, etc.).

In addition, when the transportation time of a special brand overlaps with the time of repair or auxiliary raw materials/pellet transportation, the following process is performed to eliminate the conflict.

a. When it overlaps with repair (see Figure 5) y amount ≧ lower limit stowage amount: cut X amount (receive for next transport) yffi < lower limit stowage amount: change transport brand change.

2 hours within the repair time: Change the transport brand.

b9 When the work start time falls within the repair time or when the repair is included in the work time zone, the repair completion time is set as the work start time.

Furthermore, in order to stabilize the pile quality, there is a restriction on free time for loading...for example, when loading the same brand up to 80% of the total stowage, load other brands for 8 hours before loading the corresponding brand. Start loading... is provided. This function is common to the transportation schedule for special brands as well as lump ore and coarse ore described below.

(3) Transport schedule for lump ore (864) In order to stabilize the pile quality, knowledge objects (
24) and the knowledge base (22), and determines the transport schedule (transport line, transport timing, transport period, transport amount, etc.) for the lump ore during the above-mentioned free time. Note that the free time constraints for canceling competition and loading are the same as the transportation schedule for special brands.

(4) Transport schedule for coarse ore (385) For the purpose of stabilizing the pile quality, based on the loading constraints of coarse ore (stowage free time constraints, maximum transport amount, etc.), pile components (S102), etc. Knowledge objects (24) and knowledge bases (22)
), and use the above free time to create a transport schedule for lump ore (transport line, transport timing, transport period, transport amount, etc.)
Determine.

Note that the free time constraints for canceling competition and loading are the same as for special brands. In addition, in order to bring the 5iO2 component of the concentrate bile closer to the target value, a brand selection function (P (x) However, brands with high evaluation scores are preferentially selected as transport brands.

Stock selection function P (x)-a* f(x)+b* g(x)+e*
h(x) where r(x) is the loader operating rate evaluation function, g
(x) is the S I 02 component evaluation function of the simultaneous loading issue, h
(x) is a processing amount evaluation function for each brand. Also a, b, e
is the weighting factor.

FIG. 7 is a characteristic diagram showing the loader operating rate evaluation function f (x). The loader operating rate evaluation function is determined by a function of the value (X) determined by the operating time of each loader, the repair time of each loader, and the remaining loading time, and the system allows priority allocation to brands with high loader operating rates. There is.

x - 100 * ((Operating time for each loader) + (Repair time for each loader)) / Remaining stowage time Remaining stowage time - End time of pile cycle - Scheduled start time of stowage Figure 8 shows SiO3 of simultaneous stowage brand. Component evaluation function g(x)
FIG. The 310□component evaluation function of this simultaneous stowage brand can be used to calculate the pile component S without changing the overall transport amount.
The purpose is to bring iO2 closer to the target component.

An example is shown below.

For example, the brands scheduled for simultaneous loading are given in Table 1, and S r 0
Let the group of two components be given in Table 2.

Table 1 Brand: Loading capacity: 5Io2 A B　　　　　Y　　　　　b Cz　　　　c Table 2 Old n, Max.

A6. OB 5.0 B, OC3,55,
0 D 2.0 3.5E
−2,0 At this time, if the target component S 102 is α, a −(a
*x+b*y+c*z)/(x+y+z) for stocks A and B
When the stowage of brand C is determined, the component of brand C is C-(a * (x + y + z) + a * x + b * yl /z
Calculate to determine which group of Sio 2 to Group A to E the component C (%) of brand C belongs to, and then
After setting the 102 group as the first selection ranking, compare the values closest to c (%) within the range of the components of that group,
Stocks are ranked in order of the smallest difference.

FIG. 9 is a characteristic diagram of the throughput evaluation function h(x) for each brand.

In order to increase transport efficiency, an evaluation function is set up that gives priority to products with a high throughput for each brand.

In this way, when the transportation work schedule for the special brand for one day is completed up to the component S]02 check of the concentrate bile, the work of planning the work schedule for the next day begins. When the planning of the transportation work plan for one pile is completed, when the loading of the previous pile is completed, it is registered as transportation work on the work details registration screen (31) in Fig. 2,
After that, time reservations and system reservations are made, leading to automatic operation of conveyors and moving equipment.

Furthermore, there may be cases where it becomes impossible to continue the transport work as planned due to major changes in equipment or operating conditions. For this reason, it is possible to make use of the loading work results to date and the transportation work plan created so far and re-plan the remaining part (function to re-plan from mid-way), or make corrections on the work details schedule registration screen. It has a function.

Next, a method of learning the transport efficiency of each brand of roda for the purpose of improving the accuracy of transport work planning will be explained.

FIG. 1O is a flowchart showing this learning method.

The results of the transport work (86) are written as transport work results (81) in the transport work performance summary file (82) each time each transport work is completed, and the transport work results for one pile are recorded as the loader brand. Calculated separately. When the loading of one pile is completed, the loader's transport efficiency by brand is calculated for the pile that has just been loaded, and the result is exponentially smoothed with the value (Ti) that has been used so far (83). , is stored in the file (24) as efficiency T(i+1) for transport by brand of loader, and is used to formulate a transport work plan (85) for the next time (FIG. 3).

T(1+1>-Zk/ (Tak-α)β: Exponential smoothing constant 0≦β≦1 Note that learning may be performed one task at a time, but it is calculated based on one pile based on past operating experience. Of course, it goes without saying that you can do one task at a time.

[Effects of the invention] As described above, according to this invention, the current situation and trends of the yard,
Conventionally, one shift (7 to 7 The transportation work plan, which used to take 8 hours), can now be created for one pile (approximately 8 days) in just one hour, leading to standardization and handing down of techniques and reduction of additional work. Ta. In addition, the drafted conveyance work plan will be registered as work details, and functions such as system reservation and time reservation will be provided, making it possible to automatically start and stop conveyors and moving machines without operator intervention, and This led to a reduction in additional costs. Furthermore, by adding a function to learn the transport efficiency of each brand of loader, the accuracy of transport work planning has improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a transportation work planning measure in an optimal transportation control device for a raw material yard according to an embodiment of the present invention, and FIG. 3 is a flowchart showing the operation of the device in FIG. 1; FIG. 4 is an explanatory diagram showing the contents of knowledge objects; FIG. 5 is an explanatory diagram of transport time; Figure 6 is an explanatory diagram when the transportation time overlaps with repair, and Figures 7, 8, and 9 are diagrams showing the operation rate of the loader used to determine the transport brand of powdered iron in Figure 3. Evaluation Function, S of Loaded Brand ] A characteristic diagram showing the evaluation function of the 02 component and the evaluation function of the processing amount by brand. FIG. 10 is a flowchart showing a method for learning the transport efficiency of the loader by brand. Figure 11 is a block diagram showing the configuration of an optimal conveyance control device for a raw material yard, Figure 12 is a flowchart showing a conventional method of instructing start/stop to conveyors and moving machines, and Figure 13 is a diagram showing the configuration of an optimal conveyance control device for a raw material yard. Start-up and transfer to conventional conveyors and mobile machines
It is a flowchart showing a stop instruction method.

Claims (1)

[Claims] A work plan for transporting raw materials temporarily stored in the yard is drawn up based on the pile mixing plan and changes in the inventory of blast furnace ore tanks and sinter tanks, and conveyors and moving equipment are automatically operated. Optimized conveyance control equipment for raw material yards that starts and stops on a regular basis collects yard current status data, pile mix plan data, repair plan data for conveyors and moving machines, conveyance efficiency by loader brand, and blast furnace/sintering plant operation plan data. , and a knowledge object containing brand and component data, and a knowledge base storing each data of the knowledge object and operational knowledge, to formulate a transport work plan that maximizes transport efficiency. A means for registering the drafted conveyance work plan as a work detail and making time reservations and system reservations for each system, and a means for automatically making time reservations and system reservations for lower systems, conveyors and mobile equipment. The present invention is characterized by comprising a control means for instructing start/stop, and a learning means for calculating the transport efficiency based on the transport performance of the loader by brand and updating data of the transport efficiency of the loader by brand in the knowledge object. Optimal transport control device for raw material yards.