CN113050706B - Control method and device of automatic wheat blending device - Google Patents
Control method and device of automatic wheat blending device Download PDFInfo
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- CN113050706B CN113050706B CN202110337666.6A CN202110337666A CN113050706B CN 113050706 B CN113050706 B CN 113050706B CN 202110337666 A CN202110337666 A CN 202110337666A CN 113050706 B CN113050706 B CN 113050706B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0605—Control of flow characterised by the use of electric means specially adapted for solid materials
- G05D7/0611—Control of flow characterised by the use of electric means specially adapted for solid materials characterised by the set value given to the control element
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
- A01F25/16—Arrangements in forage silos
- A01F25/20—Unloading arrangements
Abstract
The invention relates to a control method and a device of an automatic wheat distributor, wherein the method comprises the steps of obtaining grain data information and the number of granaries stored in a wheat bin and sequencing the granaries according to the grain data information; judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granaries into an opened granary after the materials are determined to be present; sending a bin opening instruction to the automatic wheat blending device after confirming all grain varieties, bin opening number and bin opening flow in a preset formula; the method comprises the steps of utilizing an empty bin sensor installed in a granary to monitor the capacity of the granary in real time, closing the current granary and sending a bin opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value. The invention can control the automatic delivery of the wheat distributor and the delivery flow according to the preset formula, and can send out an alarm signal to prompt the on-site operator to process in time after the empty granary appears.
Description
Technical Field
The invention belongs to the technical field of electronic control, and particularly relates to a control method and a control device of an automatic wheat blending device.
Background
The grain processing industry adopts the form of building storehouse mostly in the storage of grain, opens the delivery gate in building storehouse when needs produce, and grain flows into the production line under the action of gravity. When the product is produced, different varieties of grains are required to be mixed according to the formula proportion. The method for executing the formula comprises two modes, namely a first mode that a coded disc simple wheat distributor is installed below a building bin, grain delivery flow is manually adjusted, a delivery gate of grain is manually opened, the flow of the bin to be opened and the flow of the bin to be delivered are manually counted, and the next bin to be opened is manually searched after empty bins appear. And secondly, an electronic wheat distributor is arranged below a building cabin, the cabin needing to be opened and the flow of delivering the wheat are manually selected on a computer system, and the cabin is manually replaced in the system after the cabin is empty.
However, the above method has the following disadvantages:
the first method has three major disadvantages: firstly, the flow rate cannot be adjusted in real time by the simple wheat distributor with the coded disc, for example, when the discharging of a building cabin is not uniform, the outlet of the cabin cannot be increased or reduced by automatically adjusting the coded disc, so that the discharging flow rate is inaccurate. Secondly, hundreds of storehouses in the building on site can not be found in time by manpower when empty storehouses appear on site, so that the grain proportion of the product is not mixed according to the specified proportion of the formula. Thirdly, the warehouse is opened manually, the probability of wrong warehouse opening by workers is high, for example, the warehouse of variety A needs to be opened, but the warehouse of variety B is opened, and meanwhile, the waste of personnel is caused.
The second method is that the electronic wheat distributor can adjust the size of the bin opening in real time, the problem of inaccurate delivery flow is solved, but the problems of timely bin replacement after empty bin and manual bin opening mistake are not solved, and the labor is wasted.
Disclosure of Invention
In view of this, the present invention provides a method and a device for controlling an automatic wheat distributor to overcome the defects of the prior art, so as to solve the problems that the prior art cannot solve the problem of timely changing the empty bin and the problem of high cost caused by manual opening of wrong bins.
In order to achieve the purpose, the invention adopts the following technical scheme: a method of controlling an automatic wheat compounder, comprising:
acquiring grain data information stored in a granary and the number of the granaries, and sequencing the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, granary capacity and a preset formula;
judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the grain varieties are consistent after the consistency is confirmed, and counting the current granary into a granary after the material is confirmed;
sending a bin opening instruction to the automatic wheat distributor after confirming all grain varieties, bin opening numbers and bin opening flow in a preset formula;
the method comprises the steps of utilizing an empty bin sensor installed in a granary to monitor the capacity of the granary in real time, closing the current granary and sending a bin opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value.
Further, the sorting the granaries according to the grain data information includes:
sorting the granaries for the first time according to the sequence of the warehousing time;
marking the granary; the marks comprise a bin opening mark and a material mark in a bin;
and sorting the granaries sorted for the first time for the second time according to the marks.
Further, the method also comprises the following steps:
and sequentially increasing the bin opening instructions according to the sequence of the granaries sorted for the second time, wherein only one bin opening instruction is increased each time.
Further, after the material is determined to be in the granary, the method includes the following steps:
judging whether the total flow of the discharged bin exceeds the carrying capacity of the conveying equipment or not;
if the number of the granaries exceeds the preset number, judging whether the current granary is the last ranked granary or not, if so, giving an alarm, and if not, continuing to increase a bin opening instruction;
if not, storing the current bin number and increasing the actual open bin number of 1 granary.
Further, the step of sending a bin opening instruction to the automatic wheat distributor after confirming all the grain varieties, bin opening numbers and bin opening flow in the preset formula comprises the following steps:
judging whether the number of grain bins in the formula is larger than the number of actually opened bins;
if yes, continuing to increase the opening instruction; otherwise, sending the opening instructions corresponding to all the storage bin numbers to the automatic wheat distributing device.
Further, when it is monitored that the volume of the granary is lower than a preset threshold value, closing the current granary and sending a granary opening instruction to the granaries of the same grain variety, the method comprises the following steps:
acquiring empty bin signals, and acquiring bins of the same variety and the capacity of the bins of the same variety according to the empty bin signals;
and sending a bin opening instruction for closing the current granary and opening the same kind of bin.
Further, if the same variety of bins are multiple, the granaries are sorted according to the capacity of the same variety of bins.
The embodiment of the application provides an automatic controlling means who joins in marriage wheat ware includes:
the acquisition module is used for acquiring grain data information and the number of the granaries stored in the granaries and sequencing the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, grain bin capacity and a preset formula;
the judging module is used for judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granaries into an open granary after the materials are determined to be present;
the instruction module is used for sending a warehouse opening instruction to the automatic wheat blending device after confirming all grain varieties, warehouse opening numbers and warehouse opening flow in a preset formula;
and the bin changing module is used for monitoring the capacity of the granary in real time by using an empty bin sensor installed in the granary, closing the current granary and sending a bin opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value.
The embodiment of the application provides computer equipment, which comprises a processor and a memory connected with the processor;
the memory is used for storing a computer program used for executing the control method of the automatic wheat distributor provided by any one embodiment;
the processor is used to call and execute the computer program in the memory.
By adopting the technical scheme, the invention can achieve the following beneficial effects:
the invention provides a control method and a control device of an automatic wheat distributor, which can control the automatic delivery of the wheat distributor according to a preset formula and the delivery flow, and can send an alarm signal to prompt an operator on site to process in time after a granary is empty.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the steps of the control method of the automatic wheat distributor of the present invention;
FIG. 2 is a schematic flow chart of the calculation of the opening instruction of the control method of the automatic wheat distributor according to the present invention;
FIG. 3 is a schematic view of a bin change process of the control method of the automatic wheat blending machine of the present invention;
FIG. 4 is a schematic view of the control device of the automatic wheat distributor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The following describes a specific control method of an automatic wheat dispenser provided in the embodiment of the present application with reference to the accompanying drawings.
As shown in fig. 1, the control method of the automatic wheat distributor provided in the embodiment of the present application includes:
s101, acquiring grain data information and the number of the granaries stored in the granaries and sequencing the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, grain bin capacity and a preset formula;
s102, judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granaries into an open granary after the materials are determined;
s103, sending a bin opening instruction to the automatic wheat distributor after confirming all grain varieties, bin opening numbers and bin opening flow in a preset formula;
and S104, monitoring the capacity of the granary in real time by using an empty granary sensor installed in the granary, closing the current granary and sending a granary opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value.
The working principle of the control method of the automatic wheat blending device is as follows: the method is realized through a server, wherein the server stores grain varieties, warehousing time, granary capacity and a preset formula, and an operator can set the warehousing-out flow on the intelligent terminal according to the preset formula; firstly, the types and the flow of all materials in a formula are obtained, and then the types of grains in all the building bins, the states (full bin, empty bin and residual material) of the building bins and the warehousing time of the grains in the building bins on the spot are read. The method comprises the steps of obtaining the total number of building warehouses available on site, sequencing all the building warehouses according to the sequence of warehousing time, then using the warehouses used to the half warehouse first under the condition that the time sequencing is finished, then comparing whether the variety of materials in a formula is consistent with the variety of the building warehouses, if so, continuously comparing whether the current warehouse state is provided with the materials, and if so, counting the current warehouse opening.
And after checking that the types of the materials and the opening number and the flow of each type are the same, issuing an opening command and the opening flow of each bin to a wheat distributor, and starting to deliver the materials to a building bin.
After an empty bin sensor arranged on a building bin sends a signal, the building bin starts to enter a bin changing state, all the building bins are sorted according to the sequence of the time of entering the bin, then the system advances the bin used to a half bin to a previous position under the condition that the time sorting is finished, then whether the variety of the building bin is consistent with the current variety of the empty bin is compared, if so, the system checks whether the state of the current bin is material, if so, the system opens the current bin and closes the empty bin at the same time.
And calculating the number of the opened bins and the opening flow rate required by different varieties, and automatically opening the bins of the same variety and closing the empty bins after the system receives empty bin signals sent by the material level.
In some embodiments, as shown in fig. 2, the sorting the grain bins according to the grain data information includes:
sorting the granaries for the first time according to the sequence of the warehousing time;
marking the granary; the marks comprise a bin opening mark and a material mark in a bin;
and sorting the granaries sorted for the first time for the second time according to the marks.
Preferably, the method further comprises the following steps:
and sequentially increasing the bin opening instructions according to the sequence of the granaries sorted for the second time, wherein only one bin opening instruction is increased each time.
Specifically, this application is at first with the order of time to a plurality of grain storehouses in order, and mark every grain storehouse, can understand, mark the grain storehouse that has the material in the grain storehouse and the storehouse of having the storehouse opened, that is to say place in the front the grain storehouse that is not full storehouse, arrange in the front the grain storehouse that has opened the storehouse and the storehouse interior material is not full storehouse like this, send out the storehouse opening instruction earlier and use preferentially to the grain storehouse of preferential use, can prevent that grain from placing for a long time, the loss of weing. It should be noted that each opening command has only one opening to prevent the conveying capacity of the conveying equipment from being exceeded.
In some embodiments, the step of entering the current grain bin into the open bin command after determining that there is material comprises:
judging whether the total flow of the discharged materials exceeds the carrying capacity of the conveying equipment or not;
if the number of the granaries exceeds the preset number, judging whether the current granary is the last ranked granary or not, if so, giving an alarm, and if not, continuing to increase a bin opening instruction;
if not, storing the current bin number and increasing the actual open bin number of 1 granary.
Specifically, the method comprises the steps that an opening instruction is confirmed for one granary, after the opening instruction is confirmed, whether the total flow of the granary exceeds the carrying capacity of conveying equipment is judged according to the flow of the granary, if the total flow of the granary exceeds the carrying capacity of the conveying equipment, whether the current granary is the granary which is sequenced at last is judged, if the total flow of the granary is the granary which is sequenced at last, an alarm is given to prompt an operator, if the total flow of the granary is the granary which is sequenced at last, the opening instruction is continuously added, and only one opening instruction can be added each time; if the carrying capacity is not exceeded, the current bin number is stored, namely the control command of the bin is increased, and the actual open bin number of 1 granary is increased. It can be understood that a plurality of control commands are stored and are uniformly sent to the automatic wheat blending device after being judged.
In some embodiments, the sending the opening instruction to the automatic wheat blending device after confirming all the grain varieties, the number of the opening bins, and the opening flow rate in the preset recipe includes:
judging whether the number of grain bins in the formula is larger than the number of actually opened bins;
if yes, continuing to increase the opening instruction; otherwise, sending the opening instructions corresponding to all the storage bin numbers to the automatic wheat distributing device.
Specifically, judging whether all the grain types in the formula obtain the opening instruction, and then issuing the opening execution corresponding to all the stored bin numbers to the wheat distributor; if so, the number of the grain bins in the formula is not more than the number of the actual opening bins, and if the number of the grain bins in the formula is more than the number of the actual opening bins, the grain type in the formula is not configured with an opening instruction, and the judgment is still needed.
In some embodiments, as shown in fig. 3, when it is monitored that the volume of the grain bin is lower than the preset threshold, closing the current grain bin and sending a bin opening instruction to the grain bin of the same grain variety includes:
acquiring empty bin signals, and acquiring bins of the same variety and the capacity of the bins of the same variety according to the empty bin signals;
and sending a bin opening instruction for closing the current granary and opening the same kind of granary.
Preferably, if the number of the same variety bins is multiple, the granaries are sorted according to the capacity of the same variety bins.
Specifically, after a vacant bin sensor of a building bin sends a signal, the building bin starts to enter a bin changing state, all the building bins are sorted according to the sequence of the warehousing time, then the bin which is used for half the bin is advanced to the front position under the condition that the time sorting is finished, then whether the variety of the building bin is consistent with the variety of the current vacant bin is compared, if so, whether the state of the current bin is material is checked, if so, the system opens the current bin and closes the vacant bin at the same time.
The number of the opened bins and the opening flow rate required by different varieties are calculated, and after empty bin signals sent by the material level are received, the bins of the same variety are automatically opened, and the empty bins are closed simultaneously.
As shown in fig. 4, an embodiment of the present application provides a control device for an automatic wheat distributor, including:
the acquiring module 401 is configured to acquire grain data information and the number of the granaries stored in the granaries and sort the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, grain bin capacity and a preset formula;
the judging module 402 is used for judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granary into an open granary after the materials are determined to be present;
the instruction module 403 is configured to send a warehouse opening instruction to the automatic wheat distributor after confirming all the grain varieties, warehouse opening numbers, and warehouse opening flow rates in the preset recipe;
and the bin changing module 404 is configured to monitor the capacity of the granary in real time by using an empty bin sensor installed in the granary, and when the monitored capacity of the granary is lower than a preset threshold, close the current granary and send a bin opening instruction to the granary of the same grain variety.
The working principle of the control device of the automatic wheat distributor provided by the application is that the acquisition module 401 acquires grain data information and the number of the granaries stored in the wheat bin and sorts the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, granary capacity and a preset formula; the judging module 402 judges whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judges whether the granaries have materials after confirming the consistency, and counts the current granary into a granary after determining that the granary has materials; the instruction module 403 sends a warehouse opening instruction to the automatic wheat blending device after confirming all grain varieties, warehouse opening numbers and warehouse opening flow in the preset formula; the bin changing module 404 monitors the capacity of the granary in real time by using an empty bin sensor installed in the granary, and when the monitored capacity of the granary is lower than a preset threshold value, closes the current granary and sends a bin opening instruction to the granary of the same grain variety.
The embodiment of the application provides computer equipment, which comprises a processor and a memory connected with the processor;
the memory is used for storing a computer program used for executing the control method of the automatic wheat distributor provided by any one embodiment;
the processor is used to invoke and execute the computer program in the memory.
In summary, the invention provides a control method and a device of an automatic wheat distributor, wherein the method comprises the steps of obtaining grain data information and the number of granaries stored in a wheat bin and sequencing the granaries according to the grain data information; judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granaries into an opened granary after the materials are determined to be present; sending a bin opening instruction to the automatic wheat distributor after confirming all grain varieties, bin opening numbers and bin opening flow in a preset formula; the method comprises the steps of utilizing an empty bin sensor installed in a granary to monitor the capacity of the granary in real time, closing the current granary and sending a bin opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value. The invention can control the automatic discharging of the wheat distributor and the discharging flow according to the preset formula, and can send out an alarm signal to prompt the on-site operator to process in time after the granary is empty.
It can be understood that the method embodiments provided above correspond to the apparatus embodiments described above, and corresponding specific contents may be referred to each other, which are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A control method of an automatic wheat distributor is characterized by comprising the following steps:
acquiring grain data information stored in a granary and the number of the granaries, and sequencing the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, grain bin capacity and a preset formula;
judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granaries into an opened granary after the materials are determined to be present;
sending a bin opening instruction to the automatic wheat distributor after confirming all grain varieties, bin opening numbers and bin opening flow in a preset formula;
monitoring the capacity of the granary in real time by using an empty granary sensor installed in the granary, closing the current granary and sending a granary opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value;
the sorting of the granaries according to the grain data information comprises:
sorting the granaries for the first time according to the sequence of the warehousing time;
marking the granary; the marks comprise a bin opening mark and a bin material filling mark;
sorting the granaries sorted for the first time for the second time according to the marks;
further comprising:
and sequentially increasing the opening instructions according to the grain bin sequence after the second sorting, and only increasing the opening instruction of one grain bin each time.
2. The method of claim 1, wherein the step of entering the current grain bin into an open bin command after determining the presence of material comprises:
judging whether the total flow of the discharged materials exceeds the carrying capacity of the conveying equipment or not;
if the number of the granaries exceeds the preset number, judging whether the current granary is the last ranked granary or not, if so, giving an alarm, and if not, continuing to increase a bin opening instruction;
if not, storing the current bin number and increasing the actual open bin number of 1 granary.
3. The method of claim 2, wherein the step of sending a bin opening command to the automatic wheat blending machine after confirming all the grain varieties, the number of the bin openings and the bin opening flow in the preset formula comprises the following steps:
judging whether the number of grain bins in the formula is larger than the number of actually opened bins;
if yes, continuing to increase the opening instruction; otherwise, sending the opening instructions corresponding to all the storage bin numbers to the automatic wheat distributing device.
4. The method of claim 1, wherein closing the current grain bin and sending a bin opening instruction to a grain bin of the same grain variety when the grain bin capacity is monitored to be below a preset threshold comprises:
acquiring empty bin signals, and acquiring the bins of the same type and the capacity of the bins of the same type according to the empty bin signals;
and sending a bin opening instruction for closing the current granary and opening the same kind of granary.
5. The method of claim 4,
and if the number of the same variety bins is multiple, sorting the granaries according to the capacity of the same variety bins.
6. A control device of an automatic wheat distributor is characterized by comprising:
the acquisition module is used for acquiring grain data information and the number of the granaries stored in the granaries and sequencing the granaries according to the grain data information; the grain data information comprises grain varieties, warehousing time, granary capacity and a preset formula;
the judging module is used for judging whether the grain varieties in the corresponding granaries are consistent according to a preset formula, judging whether the granaries have materials after the consistency is confirmed, and counting the current granary into a granary after the materials are confirmed;
the instruction module is used for sending a bin opening instruction to the automatic wheat distributor after confirming all grain varieties, bin opening numbers and bin opening flow in a preset formula;
the granary changing module is used for monitoring the capacity of the granary in real time by using an empty granary sensor installed in the granary, closing the current granary and sending a granary opening instruction to the granary of the same grain variety when the monitored granary capacity is lower than a preset threshold value;
the sorting of the granaries according to the grain data information comprises:
sorting the granaries for the first time according to the sequence of the warehousing time;
marking the granary; the marks comprise a bin opening mark and a material mark in a bin;
sorting the granaries sorted for the first time for the second time according to the marks;
further comprising:
and sequentially increasing the opening instructions according to the grain bin sequence after the second sorting, and only increasing the opening instruction of one grain bin each time.
7. A computer device comprising a processor, and a memory coupled to the processor;
the memory is used for storing a computer program for executing the control method of the automatic wheat distributor of any one of claims 1 to 5;
the processor is used for calling and executing the computer program in the memory.
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| CN112185086B (en) * | 2020-10-12 | 2022-03-15 | 合肥弘恩机电科技有限公司 | Grain depot safety early warning system based on deviation analysis |
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