CN115336571A - Fixed circulation system based on grain management - Google Patents

Abstract

The invention discloses a fixed type circulation system based on grain management, belongs to the technical field of fixed type circulation fumigation of grains, and solves the problem that the fixed type circulation fumigation technology cannot be remotely controlled in the grain management process; after the data processing module receives information for starting the fixed circulation device sent by the grain management background, acquiring the temperature and humidity inside the grain stack and the temperature and humidity inside the granary, and judging whether to carry out pesticide application and what pesticide application mode to adopt; judging whether the air tightness of all positions of the granary before pesticide application and the air tightness of the non-fumigation space after pesticide application reach standards or not, and carrying out early warning and feedback treatment on the positions with the air tightness not reaching the standards; timing is started after pesticide application, when the timing time reaches a preset pesticide application time threshold, a fumigation gas concentration calculation gas equilibrium value is obtained, and if the timing time is greater than the preset threshold, pesticide application is suspended; and extracting grain information from the database, calculating the circulation time of the grain pile, informing the grain management background of finishing pesticide application and starting air dissipation when the circulation time is reached.

Description

Fixed circulation system based on grain management

Technical Field

The invention belongs to the technical field of fixed type circulation fumigation of grains, and particularly relates to a fixed type circulation system based on grain management.

Background

The grains need to be stored after being harvested, a large amount of grains need to be stored in and out by adopting various granaries at present, different granary facilities are different, and insect eggs or adults are easy to breed in stored grain piles due to the problems of seasonal climate and the like.

At present, the circulation fumigation technology is mostly adopted to kill insects of grain piles in a granary, the circulation fumigation technology comprises a fixed circulation fumigation technology, chemical dosing and detection are still carried out manually, and the pesticide toxicity of the insects killing is high, so that the fixed circulation device cannot be controlled to work remotely.

Therefore, the invention provides a fixed circulation system based on grain management.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a fixed circulation system based on grain management, which solves the problem that a fixed circulation fumigation technology cannot be remotely controlled in the grain management process.

To achieve the above object, an embodiment according to a first aspect of the present invention provides a fixed circulation system based on grain management, including: the system comprises a fixed type circulating device, a database, a data processing module and a grain management background;

the fixed circulation device comprises a pesticide applying device, a circulation pipeline, a circulation fan and a detection device; the pesticide applying device is arranged outside the granary and generates fumigating gas by applying fumigant in the pesticide applying device; the circulating pipeline is divided into an outer circulating pipeline and an inner circulating pipeline, and the outer circulating pipeline is connected with the pesticide applying device; the circulation pipeline is provided with a plurality of pipeline control valves for controlling the circulation of the fumigation gas inside the circulation pipeline; the outer circulation pipeline of the circulation fan is connected and used for sending the fumigation gas in the outer circulation pipeline into the inner circulation pipeline; the detection device comprises a temperature and humidity detection device, a fumigation gas concentration detection device and an air tightness detection device;

the database stores grain information of all the granaries of the unit;

the data processing module is used for processing the received information, acquiring the internal temperature and humidity of the grain bulk and the internal temperature and humidity of the granary through the detection device after receiving the information of starting the fixed circulation device sent by the grain management background, and judging whether to carry out pesticide application and what pesticide application mode to adopt; the data processing module judges whether the air tightness of all positions of the granary before pesticide application and the air tightness of the non-fumigation space after pesticide application reach standards or not, and sends the number of the air tightness detection device at the position with the air tightness reaching the standards and the early warning information of the air tightness value to the grain management background and the early warning unit arranged on the air tightness detection device with the corresponding number; the data processing module is also used for timing the time after the pesticide applying device applies the pesticide, acquiring the concentration of the fumigation gas arranged at all positions of the granary after the timing time reaches a preset pesticide applying time threshold value, calculating a gas equilibrium value, and suspending pesticide applying if the gas equilibrium value is greater than the preset gas equilibrium threshold value; the data processing module extracts grain information from the database, calculates the circulation time of the grain pile, and if the calculated circulation time is actually reached, the data processing module informs the grain management background to finish pesticide application and start air dissipation;

the grain management background controls the data processing module through remote control and processes the grain management background according to the processing result of the data processing module.

Furthermore, the temperature and humidity detection devices are uniformly distributed in the grain bulk and used for detecting the temperature and humidity of a plurality of positions of the grain bulk, and the temperature and humidity detection devices are also arranged in the grain bin outside the grain bulk and used for detecting the temperature and humidity in the grain bin; the plurality of the fumigation gas concentration detection devices are uniformly distributed at different area positions and step depth positions of the grain pile and are used for detecting the fumigation gas concentrations at different depth positions of different areas of the grain pile; the fumigant gas concentration detection device is also arranged at a plurality of pipeline control valve positions and is used for detecting the concentration of the fumigant gas at different pipeline control valve positions; the air tightness detection devices are respectively arranged between the pesticide applying device and the external circulation pipeline, the positions of the pipeline control valves and the interior of the granary outside the grain bulk, and are used for detecting the air tightness of the pipelines at different key positions and the air tightness of the interior of the granary.

Further, the grain information includes grain type, grain storage position, grain storage starting time and grain storage weight.

Further, the grain management background sends control information for starting the fixed circulation device to the data processing module; the data processing module obtains real-time humiture in the grain stack and humiture in the granary by sending information of temperature and humidity measured by the temperature and humidity measuring module, and the data processing module marks the temperature and humidity distribution of the grain stack as TRi and SRi, wherein i represents the number of the humiture detection devices distributed in the grain stack, i =1,2 and … … n; marking the temperature and the humidity inside the granary as TC and SC respectively; presetting a temperature threshold value and a humidity threshold value as TY and SY respectively;

if the temperature TRi of the grain stack and the internal temperature TC of the grain bin are both less than TY, or if the humidity SRi of the grain stack and the humidity SC of the grain bin are both greater than or equal to SY, the data processing module sends prompt information that pesticide application is temporarily not needed to a grain management background;

if the stack temperature TRi and the internal temperature TC of the granary are both greater than TY, and the stack humidity SRi and the internal humidity SC of the granary are both less than SY; the data processing module presets a temperature difference threshold value as delta TY; marking the total number of the temperature and humidity detection devices arranged in the grain pile as n; calculating the average temperature of the grain bulk

If it is

And is

If so, the data processing module adopts a first pesticide application mode;

if it is

And is

Then the data processing module adopts the implementationA second drug mode;

in other cases, the data processing module adopts a first administration mode or a second administration mode.

Furthermore, the first drug application mode adopts a mode of circulation fumigation under the film, namely a circulation pipeline is laid below the grain surface, a plastic film is covered on the grain surface, and the fumigation gas circulates in the grain pile below the grain surface; the second mode of pesticide application adopts a whole-warehouse circulation fumigation mode, namely, no plastic film is laid on the grain surface, and the fumigation gas circulates in the space above the grain surface and the whole warehouse consisting of grain piles.

Further, after the grain management background selects one of the pesticide application modes, the data processing module receives the corresponding pesticide application mode and sends corresponding arrangement prompt information to the grain management background, and if the pesticide application mode II is adopted, the grain management background needs to go to a granary in advance to lay a plastic film for grain bulk;

before pesticide application, the data processing module sends a closing control instruction to all pipeline control valves, the data processing module sends calling information to the gas tightness detection device to obtain gas tightness values at different positions, the number of the gas tightness detection device at the position with gas tightness not reaching the standard and early warning information of the gas tightness values are sent to the grain management background and the early warning units arranged on the gas tightness detection device with corresponding numbers, and after pesticide application, the gas tightness detection device still detects non-fumigation spaces.

Further, if the data processing module judges that all pipelines are good in air tightness, sending prompt information for starting pesticide application to a grain management background, and after the pesticide application is started, timing by a timing unit in the data processing module;

the data processing module marks the timing time of the timing unit as Ti and marks the application time threshold as TSi; after the medicine is applied, when Ti = TSi, the data processing module sends a suspended control instruction to the circulating fan; sending a command for calling the concentration of the fumigation gas to all the fumigation gas concentration detection devices; the data processing module arranges the acquired fumigant gas concentrations in the fumigation space in a descending order, and marks the fumigant gas concentrations as Dn, wherein n represents the number of a fumigant gas concentration detection device, and n =1,2 … … n; marking the concentration with the maximum as Dmax and the concentration with the minimum as Dmin; obtaining a gas equilibrium value through DJ = Dmin/Dmax, and presetting a gas equilibrium threshold value as DJS;

and if DJ is more than or equal to DJS, the data processing module sends a control instruction of suspending pesticide application to the grain management background.

Further, the data processing module extracts the information of the grain varieties stored in the current granary, the grain storage starting time and the grain storage weight from the database, calculates the storage time Cj of the current grain variety, and marks the grain storage weight as Gj, wherein j represents the serial number of the grain variety; the minimum rectangular volume of the grains is known through the grain varieties and is marked as Vj; obtaining the specific circulation time THj of the current grain pile according to THj = sigma x Cj x Gj x Vj;

the timing unit is used for timing the actual circulation time, and if the actual circulation time reaches THj, the data processing module sends prompt information of whether the pesticide application circulation is finished and air dissipation is started to the grain management background; after the grain management background confirms, the data processing module sends circulation for finishing pesticide application and controls a circulation pipeline at a gas dissipation end to discharge fumigation gas.

Compared with the prior art, the invention has the beneficial effects that:

the method comprises the steps that triggering information of the fixed type circulating device is sent to a data processing module through a grain management background, and the data processing module sends information of temperature and humidity, pipeline airtightness and fumigation gas concentration inside a granary and a grain pile to an inspection device in the fixed type circulating device, so that corresponding detection information is obtained; the grain management background can remotely control the fixed type circulating device; the data processing module compares the temperature and the humidity inside the granary with the temperature and the humidity inside the granary, and if the temperature of the granary and the temperature inside the granary are both smaller than a preset temperature threshold value, or if the humidity of the granary and the humidity inside the granary are both larger than or equal to a preset humidity threshold value, the data processing module informs the grain management background that pesticide application is not needed temporarily; and according to the difference value between the average temperature of the grain pile and the internal temperature of the granary and the preset temperature difference value, selecting a better pesticide application mode; the effects of pesticide application in grain piles and circulating insect repelling are better; the pipeline airtightness detection runs through the whole process of circulation before and after pesticide application, is used for detecting the airtightness of the corresponding pipeline position, prevents gas leakage caused by unqualified airtightness before pesticide application, and prevents unnecessary damage caused by the fact that fumigation gas enters a non-fumigation space in pesticide application and circulation; the data processing module compares the ratio of the lowest gas concentration to the highest gas concentration with a preset equilibrium threshold value for detecting the concentration of the fumigation gas in the circulation pipeline and the grain pile, and if the ratio is greater than the preset equilibrium threshold value, the pesticide application is suspended; the use of fumigants can be reduced on the premise of ensuring effective insect expelling; after the pesticide is applied, a timing unit of the data processing module starts timing, when the pesticide application time reaches a preset pesticide application threshold value, circulation is started, the data processing module extracts the variety information, the grain storage starting time and the grain storage weight of the current grain from a database, and the specific circulation time of the current grain pile is obtained; thereby effectively controlling the circulation and air dispersing process of the fixed circulation device.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

As shown in fig. 1, a fixed circulation system based on grain management comprises: the system comprises a fixed type circulating device, a database, a data processing module and a grain management background;

in the application, the fixed type circulation device comprises a pesticide applying device, a circulation pipeline, a circulation fan and a detection device; the fumigation agent applying device is arranged outside the granary, a worker applies fumigation agents in the fumigation agent applying device, and the fumigation gas is generated by the fumigation agent applying device through chemical reaction; wherein the fumigating gas is pesticide gas of the granary; the circulation pipeline is arranged on the wall of the granary and is divided into an outer circulation pipeline and an inner circulation pipeline, and the outer circulation pipeline is connected with the pesticide applying device; the circulation pipeline is provided with a plurality of pipeline control valves for controlling the circulation of the fumigation gas inside the circulation pipeline; the circulating fan is arranged outside the granary, is connected with the outer circulating pipeline and is used for sending the fumigation gas circulating in the outer circulating pipeline into the inner circulating pipeline; the detection device comprises temperature and humidity detection devices, a fumigation gas concentration detection device and an air tightness detection device, wherein the temperature and humidity detection devices are uniformly distributed in the grain stack and used for detecting the temperature and humidity of a plurality of positions of the grain stack; the plurality of the fumigation gas concentration detection devices are uniformly distributed at different area positions and step depth positions of the grain pile and are used for detecting the fumigation gas concentration at different depth positions of different areas of the grain pile; the fumigant gas concentration detection device is also arranged at a plurality of pipeline control valve positions and is used for detecting the concentration of the fumigant gas at different pipeline control valve positions; the air tightness detection devices are respectively arranged between the pesticide application device and the external circulation pipeline, the positions of the pipeline control valves and the interior of the granary outside the grain bulk and are used for detecting the air tightness of pipelines at different key positions and the air tightness of the interior of the granary;

in the application, the database stores grain information of all the granaries of the unit, wherein the grain information comprises grain varieties, grain storage positions, grain storage starting time and grain storage weight;

in the application, related workers carry out remote control on the fixed type circulating device through the grain management background;

in the present application, the data processing module is configured to process detection data of a detection device; specifically, the method comprises the following steps:

step S1: the grain management background sends control information for starting the fixed circulation device to the data processing module; the method comprises the following steps that a data processing module sends a temperature and humidity measurement instruction to a temperature and humidity detection device, real-time temperature and humidity detected by the temperature and humidity detection device which is uniformly distributed in a grain pile are obtained, temperature and humidity in a granary which is arranged outside the grain pile are obtained, the temperature and humidity distribution of the grain pile is marked as TRi and SRi by the data processing module, wherein i represents the number of the temperature and humidity detection device which is distributed in the grain pile, i =1,2 and … … n; marking the temperature and the humidity inside the granary as TC and SC respectively;

presetting a temperature threshold value and a humidity threshold value as TY and SY respectively; the data processing module compares all the acquired temperatures and humidity with corresponding threshold values; if the temperature TRi of the grain stack and the internal temperature TC of the grain bin are both less than TY, or if the humidity SRi of the grain stack and the humidity SC of the grain bin are both greater than or equal to SY, the data processing module sends prompt information that pesticide application is temporarily not needed to a grain management background;

step S2: if the stack temperature TRi and the internal temperature TC of the granary are both greater than TY, and the stack humidity SRi and the internal humidity SC of the granary are both less than SY; the data processing module presets a temperature difference threshold value as delta TY; marking the total number of the temperature and humidity detection devices arranged in the grain pile as n; calculating the average temperature of the grain bulk

If it is

And is

If so, the data processing module adopts a first pesticide application mode;

if it is

And is

If so, the data processing module adopts a second pesticide application mode;

in other cases, the data processing module adopts a first medicine application mode or a second medicine application mode;

the first mode of pesticide application adopts a mode of circulation fumigation under a film, namely a circulation pipeline is laid below the grain surface, a plastic film is covered on the grain surface, and fumigation gas circulates in a grain pile below the grain surface; the second pesticide application mode adopts a whole-bin circulating fumigation mode, namely, no plastic film is laid on the grain surface, and the fumigation gas circulates in the space above the grain surface and the whole barn consisting of grain piles; wherein no matter in the first medicine application mode or the second medicine application mode, a circulation pipeline is laid below the grain surface, when the first medicine application mode is adopted, a pipeline control valve of the circulation pipeline below the grain surface is opened, and when the second medicine application mode is adopted, a pipeline control valve of the circulation pipeline below the grain surface is closed; according to the gas power theory, the corresponding pesticide application mode is adopted, so that the pest expelling effect on the grain stack is better, and meanwhile, if the air tightness of the granary is not good enough, the pesticide application mode I can be adopted;

and step S3: after confirming the corresponding pesticide application mode, the data processing module sends the pesticide application mode to the grain management background, the grain management background goes to a corresponding place to lay the fumigant of the pesticide application device, and if the pesticide application mode is adopted, the grain surface plastic film is laid for a while;

when the grain management background selects one of the pesticide application modes, the data processing module receives the corresponding pesticide application mode and sends corresponding layout prompt information to the grain management background, and if the pesticide application mode II is adopted, the grain management background needs to go to a granary in advance to lay a plastic film for grain piles;

before pesticide application, the data processing module sends a closing control instruction to all pipeline control valves, the data processing module sends an instruction for calling for air tightness detection to all air tightness detection devices, the number of the air tightness detection devices with air tightness not reaching the standard and early warning information of air tightness values are sent to a grain management background and early warning units arranged on the air tightness detection devices with corresponding numbers, the early warning units send out audible and visual alarms, and the grain management background informs related workers of maintenance in the future; after the pesticide is applied, the air tightness detection device still detects the non-fumigation space, and sends the number of the air tightness detection device at the position with air tightness not reaching the standard and the early warning information of the air tightness value to the grain management background and the early warning unit arranged on the air tightness detection device with the corresponding number;

and step S4: if the data processing module judges that all pipelines have good air tightness, sending prompt information for starting pesticide application to the grain management background, arranging related workers to go to the pesticide application device to place fumigant by the grain management background, and confirming that the applied pesticide information is sent to the data processing module;

after the medicine application is started, a timing unit in the data processing module starts timing;

the data processing module marks the timing time of the timing unit as Ti and marks the application time threshold as TSi; after pesticide application, when Ti = TSi, the data processing module sends a pause control instruction to the circulating fan; sending a command for calling the concentration of the fumigation gas to all the fumigation gas concentration detection devices; the data processing module arranges the acquired fumigant gas concentrations in the fumigation space in a descending order, and marks the fumigant gas concentrations as Dn, wherein n represents the number of a fumigant gas concentration detection device, and n =1,2 … … n; marking the maximum concentration as Dmax and the minimum concentration as Dmin; obtaining a gas equilibrium value through DJ = Dmin/Dmax, and presetting a gas equilibrium threshold value as DJS;

if DJ is larger than or equal to DJS, the data processing module sends a control instruction of suspending pesticide application to the grain management background;

if the second pesticide application mode is adopted, the data processing module compares the obtained concentration of the fumigation gas in the granary above the grain surface with the concentration threshold of a non-fumigation space, if the concentration is greater than or equal to the concentration threshold, the data processing module sends alarm information to a grain management background and an early warning device arranged in the granary, the early warning device gives out sound and light alarm, and if related workers exist in the granary, the protective clothing needs to be removed or put on in time;

step S5: the data processing module extracts the information of the grain varieties stored in the current granary, the grain storage starting time and the grain storage weight from the database, automatically calculates the storage time Cj of the current variety of grain, and marks the grain storage weight as Gj, wherein j represents the serial number of the grain varieties; the minimum rectangular volume of the grains is known through the grain varieties and is marked as Vj; obtaining the specific circulation time THj of the current grain pile according to THj = sigma x Cj x Gj x Vj;

the timing unit is used for timing the actual circulation time, and if the actual circulation time reaches THj, the data processing module sends prompt information of whether the pesticide application circulation is finished and air dissipation is started to the grain management background;

after the grain management background confirms, the data processing module sends circulation for finishing pesticide application and controls a circulation pipeline at a gas dissipation end to discharge fumigation gas.

The above formulas are all calculated by removing dimensions and taking numerical values thereof, the formula is a formula which is obtained by acquiring a large amount of data and performing software simulation to obtain the closest real situation, and the preset parameters and the preset threshold value in the formula are set by the technical personnel in the field according to the actual situation or obtained by simulating a large amount of data.

The working principle of the invention is as follows: the method comprises the steps that triggering information of the fixed circulation device is sent to a data processing module through a grain management background, and the data processing module sends information of temperature and humidity, pipeline airtightness and fumigation gas concentration inside a granary and a grain pile to an inspection device in the fixed circulation device to obtain corresponding detection information; the data processing module compares the temperature and the humidity inside the granary with the temperature and the humidity inside the granary, and if the temperature of the granary and the temperature inside the granary are both smaller than a preset temperature threshold value, or if the humidity of the granary and the humidity inside the granary are both larger than or equal to a preset humidity threshold value, the data processing module informs the grain management background that pesticide application is not needed temporarily; and according to the difference value between the average temperature of the grain pile and the internal temperature of the granary and the preset temperature difference value, selecting a better pesticide application mode; the pipeline air tightness detection runs through the whole circulation process before and after pesticide application and is used for detecting the air tightness of the corresponding pipeline position; the data processing module compares the ratio of the lowest gas concentration to the highest gas concentration with a preset equilibrium threshold value for detecting the concentration of the fumigation gas in the circulation pipeline and the grain pile, and if the ratio is greater than the preset equilibrium threshold value, the pesticide application is suspended; after pesticide application, a timing unit of the data processing module starts timing, circulation is started when pesticide application time reaches a preset pesticide application threshold, the data processing module extracts current grain variety information, grain storage starting time and grain storage weight from a database, specific circulation time of a current grain pile is obtained, and actual circulation time of the fixed circulation device is controlled.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (8)

1. A fixed circulation system based on grain management, comprising: the system comprises a fixed type circulating device, a database, a data processing module and a grain management background;

the fixed circulation device comprises a pesticide applying device, a circulation pipeline, a circulation fan and a detection device; the pesticide applying device is arranged outside the granary and generates fumigating gas by applying fumigant in the pesticide applying device; the circulating pipeline is divided into an outer circulating pipeline and an inner circulating pipeline, and the outer circulating pipeline is connected with the pesticide applying device; the circulation pipeline is provided with a plurality of pipeline control valves for controlling the circulation of the fumigation gas inside the circulation pipeline; the outer circulation pipeline of the circulation fan is connected and used for sending the fumigation gas in the outer circulation pipeline into the inner circulation pipeline; the detection device comprises a temperature and humidity detection device, a fumigation gas concentration detection device and an air tightness detection device;

the database stores grain information of all the granaries of the unit;

the data processing module is used for processing the received information, acquiring the internal temperature and humidity of the grain bulk and the internal temperature and humidity of the granary through the detection device after receiving the information of starting the fixed circulation device sent by the grain management background, and judging whether to carry out pesticide application and what pesticide application mode to adopt; the data processing module judges whether the air tightness of all positions of the granary before pesticide application and the air tightness of the non-fumigation space after pesticide application reach standards or not, and sends the number of the air tightness detection device at the position with the air tightness reaching the standards and the early warning information of the air tightness value to the grain management background and the early warning unit arranged on the air tightness detection device with the corresponding number; the data processing module is also used for timing the time after the pesticide applying device applies the pesticide, acquiring the concentration of the fumigation gas arranged at all positions of the granary after the timing time reaches a preset pesticide applying time threshold value, calculating a gas equilibrium value, and suspending pesticide applying if the gas equilibrium value is greater than the preset gas equilibrium threshold value; the data processing module extracts grain information from the database, calculates the circulation time of the grain pile, and if the calculated circulation time is actually reached, the data processing module informs the grain management background to finish pesticide application and start air dissipation;

the grain management background controls the data processing module through remote control and processes the grain management background according to the processing result of the data processing module.

2. The fixed circulation system based on grain management according to claim 1, wherein a plurality of temperature and humidity detection devices are uniformly distributed inside the grain pile and used for detecting the temperature and humidity of a plurality of positions of the grain pile, and the temperature and humidity detection devices are further arranged inside a granary outside the grain pile and used for detecting the temperature and humidity inside the granary; the plurality of the fumigation gas concentration detection devices are uniformly distributed at different area positions and step depth positions of the grain pile and are used for detecting the fumigation gas concentration at different depth positions of different areas of the grain pile; the fumigant gas concentration detection device is also arranged at a plurality of pipeline control valve positions and is used for detecting the concentration of the fumigant gas at different pipeline control valve positions; the air tightness detection devices are respectively arranged between the pesticide applying device and the external circulation pipeline, the positions of the pipeline control valves and the interior of the granary outside the grain bulk, and are used for detecting the air tightness of the pipelines at different key positions and the air tightness of the interior of the granary.

3. The stationary circulating system for grain-based management as claimed in claim 1, wherein the grain information includes grain type, grain storage location, grain start storage time and grain storage weight.

4. The fixed circulation system based on grain management as claimed in claim 1, wherein the grain management background sends control information for starting the fixed circulation device to the data processing module; the data processing module obtains real-time humiture in the grain stack and humiture in the granary by sending information of temperature and humidity measured by the temperature and humidity measuring module, and the data processing module marks the temperature and humidity distribution of the grain stack as TRi and SRi, wherein i represents the number of the humiture detection devices distributed in the grain stack, i =1,2 and … … n; marking the temperature and the humidity inside the granary as TC and SC respectively; presetting a temperature threshold value and a humidity threshold value as TY and SY respectively;

if the temperature TRi of the grain stack and the internal temperature TC of the grain bin are both less than TY, or if the humidity SRi of the grain stack and the internal humidity SC of the grain bin are both more than or equal to SY, the data processing module sends prompt information that the pesticide application is temporarily not needed to a grain management background;

if the stack temperature TRi and the internal temperature TC of the granary are both greater than TY, and the stack humidity SRi and the internal humidity SC of the granary are both less than SY; the data processing module presets a temperature difference threshold value as delta TY; marking the total number of the temperature and humidity detection devices arranged in the grain pile as n; calculating the average temperature of the grain heap

If it is

And is

If so, the data processing module adopts a first pesticide application mode;

if it is

And is

If so, the data processing module adopts a second pesticide application mode;

in other cases, the data processing module adopts a first administration mode or a second administration mode.

5. The fixed type circulation system based on grain management as claimed in claim 4, wherein in the first drug application mode, a circulation fumigation mode under a film is adopted, namely a circulation pipeline is laid below a grain surface, a plastic film is covered on the grain surface, and fumigation gas circulates in a grain pile below the grain surface; the second mode of pesticide application adopts a whole-warehouse circulation fumigation mode, namely, plastic films are not laid on the grain surfaces, and the fumigation gas circulates in the space above the grain surfaces and the whole warehouse consisting of grain piles.

6. The fixed type circulation system based on grain management of claim 1, wherein after the grain management background selects one of the pesticide application modes, the data processing module receives the corresponding pesticide application mode and sends corresponding layout prompt information to the grain management background, and if the pesticide application mode II is adopted, the fixed type circulation system needs to go ahead to a grain bin in advance to lay a plastic film for grain bulk;

before pesticide application, the data processing module sends a closing control instruction to all pipeline control valves, the data processing module sends calling information to the gas tightness detection device to obtain gas tightness values at different positions, the number of the gas tightness detection device at the position with gas tightness not reaching the standard and early warning information of the gas tightness values are sent to the grain management background and the early warning units arranged on the gas tightness detection device with corresponding numbers, and after pesticide application, the gas tightness detection device still detects non-fumigation spaces.

7. The fixed type circulation system based on grain management as claimed in claim 1, wherein if the data processing module determines that all pipelines are good in air tightness, a prompt message for starting pesticide application is sent to a grain management background, and after pesticide application is started, a timing unit in the data processing module starts timing;

the data processing module marks the timing time of the timing unit as Ti and marks the application time threshold as TSi; after pesticide application, when Ti = TSi, the data processing module sends a pause control instruction to the circulating fan; sending a command for calling the concentration of the fumigation gas to all the fumigation gas concentration detection devices; the data processing module arranges the acquired fumigant gas concentrations in the fumigation space in a descending order, and marks the fumigant gas concentrations as Dn, wherein n represents the number of a fumigant gas concentration detection device, and n =1,2 … … n; marking the concentration with the maximum as Dmax and the concentration with the minimum as Dmin; obtaining a gas equilibrium value through DJ = Dmin/Dmax, and presetting a gas equilibrium threshold value as DJS;

and if DJ is more than or equal to DJS, the data processing module sends a control instruction of suspending pesticide application to the grain management background.

8. The fixed type circulation system based on grain management as claimed in claim 1, wherein the data processing module extracts information of grain varieties, grain initial storage time and grain storage weight stored in a current granary from a database, calculates the storage time Cj of the current variety of grain, and marks the storage weight of the current variety of grain as Gj, wherein j represents the number of the grain varieties; the minimum rectangular volume of the grains is known through the grain varieties and is marked as Vj; obtaining the specific circulation time THj of the current grain pile according to THj = sigma x Cj x Gj x Vj;

the timing unit is used for timing the actual circulation time, and if the actual circulation time reaches THj, the data processing module sends prompt information of whether the pesticide application circulation is finished and air dissipation is started to the grain management background; after the grain management background confirms, the data processing module sends circulation for finishing pesticide application and controls a circulation pipeline at a gas dissipation end to discharge fumigation gas.

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