CN110686371B - Granary air conditioner automatic temperature control method based on temperature field cloud picture - Google Patents
Granary air conditioner automatic temperature control method based on temperature field cloud picture Download PDFInfo
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Abstract
The invention discloses a granary air conditioner automatic temperature control method based on a temperature field cloud picture, which comprises the following steps: acquiring grain temperature data, rearranging the grain temperature data according to the layout of sensors in a granary, and performing data processing on the arranged grain temperature data to complement the missing grain temperature data between sensor arrays and outside the sensor arrays; step two, obtaining a temperature field cloud picture of the granary according to the grain temperature data after data processing; respectively calculating a first area, a second area, a third area and a fourth area converted into an actual space, and calculating to obtain a first area change rate, a second area change rate, a third area change rate and a fourth area change rate of two adjacent days; step four, controlling the granary air conditioner as follows: and respectively judging according to threshold intervals of grain temperature, performing cooling treatment according to cooling stages when the area and area change rate conditions are met in the threshold intervals, and otherwise, automatically performing the cooling treatment by one stage.
Description
Technical Field
The invention relates to an air conditioner temperature control grain storage technology, in particular to a granary air conditioner automatic temperature control method based on a temperature field cloud chart.
Background
At present, the air conditioner temperature control technology often adopts an operation mode of manually opening and closing the air conditioner, the operation process is troublesome and labor-consuming, whether the granary is cooled to a proper temperature or not is judged only by manual experience, and the judgment result is not accurate enough. Patent application 201721143049.8 provides the ladder cooling control system of special air conditioner of grain, and temperature and air-out temperature sensor gather evaporimeter refrigerant temperature in the granary are gathered to the ventilation temperature sensor, and through control system's judgement back, the evaporating temperature of control refrigerant makes the cold wind temperature of air conditioning unit output carry out 1/2 and 2/3, the cascaded decline of full speed along with the granary temperature. The system comprehensively judges and controls the cooling grade only through the temperature in the granary and the temperature of the air-conditioning refrigerant, does not consider the change condition of the surface temperature of the grain pile, and considers the factors not comprehensive enough.
The application of the air-conditioning temperature-control grain storage technology effectively solves the problems of high grain temperature on the surface layer of the grain pile in summer, fast grain deterioration and the like, and has important significance for ensuring the grain safety in summer, keeping the grain storage quality, delaying grain aging, avoiding or reducing chemical pesticide pollution and the like.
Therefore, it is necessary to provide an automatic control method for controlling the temperature of the granary air conditioner. The method can utilize grain temperature and bin temperature and the change rule thereof to adjust the temperature control effect of the air conditioner in a targeted manner, realize accurate control of the surface temperature of the granary and the grain pile, increase the automation degree of the granary, reduce the waste of electric quantity and energy, save the management cost of the granary, make the granary more convenient and ensure the safety of grains in summer.
Disclosure of Invention
The invention designs and develops an automatic temperature control method of a granary air conditioner based on a temperature field cloud chart, and aims to solve the problems that the temperature of the upper layer of a grain pile is increased too fast, the quality of grains is easily affected due to overhigh grain temperature and proper external auxiliary equipment is needed for cooling adjustment in the process of storing grains in a part of granaries in summer.
The invention aims to solve the problems that the existing air conditioner temperature control mode mostly adopts a mode of opening the air conditioner for a long time, which causes a large amount of electricity waste and cold air waste.
The technical scheme provided by the invention is as follows:
a granary air conditioner automatic temperature control method based on a temperature field cloud picture comprises the following steps:
acquiring grain temperature data, rearranging the grain temperature data according to the layout of sensors in a granary, and performing data processing on the arranged grain temperature data to complement the missing grain temperature data between sensor arrays and outside the sensor arrays;
step two, obtaining a temperature field cloud picture of the granary according to the grain temperature data after data processing;
respectively calculating areas higher than a first temperature threshold value, a second temperature threshold value, a third temperature threshold value and a fourth temperature threshold value in the temperature field cloud picture, converting the areas into a first area, a second area, a third area and a fourth area of an actual space, and calculating to obtain a first area change rate, a second area change rate, a third area change rate and a fourth area change rate of two adjacent days;
step four, controlling the granary air conditioner as follows:
judging according to threshold intervals of grain temperature respectively, and performing cooling treatment according to cooling stages when the area and area change rate conditions are met in the threshold intervals, or automatically performing cooling treatment by one stage;
wherein, the threshold interval of grain temperature, the cooling progression and the area and area change rate conditions include:
when Tc is>At T3, S3≥s3And Δ S3≥Δs3And at the moment, 5-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T3, S3≥s3And Δ S3<Δs3And at the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is regulated to T2, S3<s3And Δ S3≥Δs3At the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T2;
when Tc is>At T2, S2≥s2And Δ S2≥Δs2And at the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is regulated to T2, S2≥s2And Δ S2＜Δs2And at the moment, 3-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T1, S2＜s2And Δ S2≥Δs2At the moment, the granary air conditioner is cooled for 3 levels, and the temperature of the granary air conditioner is adjusted to T1;
when Tc is>At T1, S1≥s1And Δ S1≥Δs1And at the moment, 3-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T1, S1≥s1And Δ S1＜Δs1And at the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0, S1＜s1And Δ S1≥Δs1At the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0;
when Tc is>At T0, S0≥s0And Δ S0≥Δs0And at the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0, S0≥s0And Δ S0＜Δs0And at the moment, the temperature is reduced for 1 level, and the temperature of the granary air conditioner is adjusted to T0-5, S0＜s0And Δ S0≥Δs0And at the moment, the temperature is reduced for 1 level, and the temperature of the granary air conditioner is adjusted to T0-5, S0＜s0And Δ S0＜Δs0At the moment, the granary air conditioner is stopped;
wherein Tc is the cabin temperature, T0 is the first temperature threshold, T1 is the second temperature threshold, T2 is the third temperature threshold, T3 is the fourth temperature threshold, S0Is a first area, S1Is the second area, S2Is the third area, S3Is the fourth area, Δ S0Is the first area rate of change, Δ S1Is a secondRate of change of area, Δ S2Is the third area rate of change, Δ S3Is the fourth area rate of change, s0Is a first area threshold value, s1Is the second area threshold, s2Is the third area threshold, s3Is the fourth area threshold, Δ s0First area rate of change threshold, Δ s1Second area change rate threshold, Δ s2Third area change rate threshold, Δ s3A fourth area rate of change threshold.
Preferably, in the first step, an interpolation method is adopted, the sensor distribution cross section in the granary is interpolated through constructing difference quotient, and then the arranged grain temperature data is subjected to data processing, and the missing grain temperature data between the sensor arrays and outside the sensor arrays is completed.
Preferably, in the second step, the temperature field cloud chart is parallel to the XOY plane.
Preferably, in the third step, the area in the temperature field cloud map is converted into the area in real space by a pixel space-to-real space conversion method, and the calculation process includes:
in the formula, SsRepresenting the area of the real space above the temperature threshold region, SpThe area of the pixel above the temperature threshold region is represented, L and H respectively represent the length and width of the temperature field plane representing the actual plane, and M and N respectively represent the length and width of the temperature field cloud picture.
Preferably, T0, T1, T2 and T3 are 20 ℃, 25 ℃, 30 ℃ and 35 ℃, respectively.
Preferably, s is0＝120㎡，s1＝100㎡，s2＝80㎡，s3＝60㎡。
Preferably,. DELTA.s0＝1㎡/d、Δs1＝0.8㎡/d、Δs2＝0.6㎡/d、Δs3＝0.4㎡/d。
Compared with the prior art, the invention has the following beneficial effects: the air-conditioning temperature-control grain storage has obvious effect on controlling the temperature rise of grain on the upper layer of grain heap in summer, has the advantages of small investment, quick installation, simple operation, low cost and the like, is gradually adopted by more and more grain enterprises, and is particularly applied to more grain storage. The automatic temperature control judgment method of the air conditioner based on the temperature field cloud chart enables the air conditioner temperature control system to carry out multi-level control according to the granary, the grain pile and the change rule of the granary, solves the problem of electric energy and resource waste caused by long-time non-specific-purpose operation of the granary air conditioner, and avoids the influence of the long-time operation of the air conditioner on the grain quality.
Drawings
Fig. 1 is a schematic flow chart of an automatic temperature control method of a granary air conditioner according to the present invention.
FIG. 2 is a cloud graph of a temperature field in an embodiment of the invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1, the invention provides a granary air conditioner automatic temperature control method based on a temperature field cloud picture, which utilizes grain temperature data acquired by a granary temperature detection system in real time to generate a plane temperature field cloud picture, and carries out air conditioner temperature control automatic adjustment according to area sizes of different temperatures in the temperature field cloud picture and the change rate of the area sizes in combination with the granary temperature, thereby solving the problem that the upper layer grain temperature of a granary is easy to rise in summer in the traditional storage, solving the problem that electric quantity and cold air are wasted due to the fact that an air conditioner is opened for a long time in a granary provided with an air conditioner, saving the management cost of energy and the granary, and simultaneously solving the problems that the surface layer temperature change of the granary is not considered and the factors are not comprehensive in the traditional air conditioner temperature control method, and specifically comprises the following steps:
step one, calling grain condition data collected by a granary temperature detection system, and finishing cleaning of the grain condition data;
wherein, the data cleaning is to delete the data with overlarge values (more than 50 ℃), undersize (less than-15 ℃) and messy codes in the grain condition temperature data and replace the data with the average value of the normal temperature measuring point data of the whole bin;
secondly, rearranging the grain temperature data according to the layout of the granary sensors;
thirdly, interpolating the distribution section (plane) of the sensors in the granary by adopting an interpolation method and a method for constructing a difference quotient, and supplementing the grain situation data which are lost between the sensor arrays and outside the sensor arrays;
generating a temperature field cloud picture of the granary parallel to the XOY plane, namely a temperature field cloud picture parallel to the horizontal plane;
step five, setting temperature thresholds T0, T1, T2 and T3 according to production experience; area threshold of s0、s1、s2、s3(ii) a Area change rate threshold is Δ s0、Δs1、Δs2、Δs3；
Calculating the area of the temperature field cloud picture above a temperature threshold T0, and converting the area into the actual space according to a pixel space-to-actual space conversion method to obtain the area S0(ii) a Calculating the area of the temperature field cloud picture above a temperature threshold T1, and converting the area into the actual space according to a pixel space-to-actual space conversion method to obtain the area S1(ii) a Calculating the area of the temperature field cloud picture above a temperature threshold T2, and converting the area into the actual space according to a pixel space-to-actual space conversion method to obtain the area S2(ii) a Calculating the area of the temperature field cloud picture above a temperature threshold T3, and converting the area into the actual space according to a pixel space-to-actual space conversion method to obtain the area S3；
Step six, calculating the area S of two adjacent days0、S1、S2、S3Respectively, are Δ S0、ΔS1、ΔS2、ΔS3；
Step seven, automatically adjusting the air conditioning cooling degree according to the set area threshold value and the area change rate threshold value until the cooling is finished;
the method for automatically adjusting the refrigeration degree of the air conditioner comprises the following steps of:
step 1, judging the bin temperature Tc is more than T3, if so, continuously judging the area and area change rate conditions, and cooling according to the result; if not, automatically reducing the first-stage treatment, and entering the step 2;
step 2, judging the bin temperature Tc is more than T2, if so, continuing to judge the area and area change rate condition, otherwise, automatically reducing the first-level processing, and entering the step 3;
step 3, judging the bin temperature Tc is more than T1, if so, continuing to judge the area and area change rate condition, otherwise, automatically reducing the first-level processing, and entering the step 4;
step 4, judging the bin temperature Tc is more than T0, if so, continuing to judge the area and area change rate condition, and if not, not needing to start the air conditioner;
the correspondence between the area and the area change rate determination condition and the cooling level is shown in table 1:
TABLE 1 correspondence between area and area Change Rate determination conditions and Cooling grades
In another embodiment, the temperature threshold T0<T1<T2<T3, set up according to the grain temperature change situation of granary; preferably, particularly in the northeast region, T0, T1, T2 and T3 are 20 ℃, 25 ℃, 30 ℃ and 35 ℃, respectively, and the area thresholds are s0＝120㎡，s1＝100㎡，s2＝80㎡，s360 square meters, the threshold value of the area change rate is delta s0＝1㎡/d、Δs1＝0.8㎡/d、Δs2＝0.6㎡/d、Δs3＝0.4㎡/d。
In another embodiment, the conversion method from the pixel space to the actual space is as follows:
in the formula, SsRepresenting the area of the real space above the temperature threshold region, SpThe area of the pixel above the temperature threshold region is represented, L and H respectively represent the length and width of the temperature field plane representing the actual plane, and M and N respectively represent the length and width of the temperature field cloud picture.
Examples
Taking an experimental square silo in Liaoning province as an example, and taking a horizontal warehouse as an example, but not limited to the horizontal warehouse, such as a squat silo and a vertical silo, should be within the protection scope.
The invention provides a granary air conditioner automatic temperature control method based on a temperature field cloud chart, which specifically comprises the following steps:
step one, calling the granary temperature detection system to acquire real-time grain condition data and finishing cleaning the grain condition data;
and step two, respectively arranging 11, 5 and 3 rows, columns and layers according to the layout of the granary sensors, and rearranging the grain temperature data according to the rows, columns and layers to obtain 3 layers of horizontal sections.
And thirdly, interpolating the distributed cross section (plane) of the sensor in the granary by adopting an interpolation method, and supplementing the grain condition data which are lost between the sensor arrays and outside the sensor arrays.
And step four, generating a temperature field cloud picture of the granary parallel to the XOY plane.
Step five, setting a temperature threshold T0 to be 20 ℃ and a temperature threshold T1 to be 25 ℃ according to actual production experience; t2 ═ 30 ℃; t3 ═ 35 ℃; area threshold of s0＝120㎡，s1＝100㎡，s2＝80㎡，s360 square meters; area change rate threshold is Δ s0＝1㎡/d、Δs1＝0.8㎡/d、Δs20＝0.6㎡/d、Δs3＝0.4㎡/d。
Calculating the area size of a cloud graph of a temperature field of 2018, 7, 25 and 25 days, wherein the area size is higher than the threshold temperature T0 and 20 ℃, the area size is 122880 pixels, and the area size is converted into an actual area of 283.8 square meters; calculating the area size of 15360 pixels of the temperature field cloud picture higher than the threshold temperature T1 which is 25 ℃, and converting the area size into an actual area of 35.6 square meters; and (3) calculating the area size of the temperature field cloud picture higher than the threshold temperature T2 of 30 ℃ to be 0 square meter.
Step six, calculating the change rates of the areas S0 and S1 of the two adjacent days, wherein the change rates are respectively delta S0＝0.78㎡/d、ΔS1＝0.14㎡/d。
Step seven, the area change rate Delta S at the moment0＝0.78㎡/d>Δs0＝0.6㎡/d，ΔS1＝0.14㎡/d<Δs10.4 square meter/d, area S0 at this time>s0，S1<s1According to the cooling grade judgment table, the 2-grade cooling is carried out, the bin temperature is 29 ℃ at the moment, namely T1 is 25 ℃ less than 29 ℃ less than 30 ℃, so that the 2-grade cooling is carried out, the cloud chart after the air conditioner starts is shown in fig. 2, and the air conditioner temperature of the granary is adjusted as shown in table 2.
TABLE 2 corresponding relationship between area and area Change Rate determination conditions and Cooling grade
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. A granary air conditioner automatic temperature control method based on a temperature field cloud picture is characterized by comprising the following steps:
acquiring grain temperature data, rearranging the grain temperature data according to the layout of sensors in a granary, and performing data processing on the arranged grain temperature data to complement the missing grain temperature data between sensor arrays and outside the sensor arrays;
step two, obtaining a temperature field cloud picture of the granary according to the grain temperature data after data processing;
respectively calculating areas higher than a first temperature threshold value, a second temperature threshold value, a third temperature threshold value and a fourth temperature threshold value in the temperature field cloud picture, converting the areas into a first area, a second area, a third area and a fourth area of an actual space, and calculating to obtain a first area change rate, a second area change rate, a third area change rate and a fourth area change rate of two adjacent days;
step four, controlling the granary air conditioner as follows:
judging according to threshold intervals of grain temperature respectively, and performing cooling treatment according to cooling stages when the area and area change rate conditions are met in the threshold intervals, or automatically performing cooling treatment by one stage;
wherein, the threshold interval of grain temperature, the cooling progression and the area and area change rate conditions include:
when Tc is>At T3, S3≥s3And Δ S3≥Δs3And at the moment, 5-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T3, S3≥s3And Δ S3<Δs3And at the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is regulated to T2, S3<s3And Δ S3≥Δs3At the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T2;
when Tc is>At T2, S2≥s2And Δ S2≥Δs2And at the moment, 4-level cooling is carried out, and the temperature of the granary air conditioner is regulated to T2, S2≥s2And Δ S2＜Δs2And at the moment, 3-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T1, S2＜s2And Δ S2≥Δs2At the moment, the granary air conditioner is cooled for 3 levels, and the temperature of the granary air conditioner is adjusted to T1;
when Tc is>At T1, S1≥s1And Δ S1≥Δs1And at the moment, 3-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T1, S1≥s1And Δ S1＜Δs1And at the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0, S1＜s1And Δ S1≥Δs1At the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0;
when Tc is>At T0, S0≥s0And Δ S0≥Δs0And at the moment, 2-level cooling is carried out, and the temperature of the granary air conditioner is adjusted to T0, S0≥s0And Δ S0＜Δs0And at the moment, the temperature is reduced for 1 level, and the temperature of the granary air conditioner is adjusted to T0-5, S0＜s0And Δ S0≥Δs0And at the moment, the temperature is reduced for 1 level, and the temperature of the granary air conditioner is adjusted to T0-5, S0＜s0And Δ S0＜Δs0At the moment, the granary air conditioner is stopped;
wherein Tc is the cabin temperature, T0 is the first temperature threshold, T1 is the second temperature threshold, T2 is the third temperature threshold, T3 is the fourth temperature threshold, S0Is a first area, S1Is the second area, S2Is the third area, S3Is the fourth area, Δ S0Is the first area rate of change, Δ S1Is the second area rate of change, Δ S2Is the third area rate of change, Δ S3Is the fourth area rate of change, s0Is a first area threshold value, s1Is the second area threshold, s2Is the third area threshold, s3Is the fourth area threshold, Δ s0Is a first area rate of change threshold, Δ s1Is the second area rate of change threshold, Δ s2Is the third area change rate threshold, Δ s3Is the fourth area rate of change threshold.
2. The granary air-conditioning automatic temperature control method based on the temperature field cloud picture according to claim 1, wherein in the first step, an interpolation method is adopted, the sensor distribution cross section in the granary is interpolated through constructing difference quotient, and then the arranged grain temperature data is processed, and the missing grain temperature data between the sensor arrays and outside the sensor arrays is compensated.
3. The granary air-conditioning automatic temperature control method based on the temperature field cloud picture according to claim 2, wherein in the second step, the temperature field cloud picture is parallel to an XOY plane.
4. The granary air-conditioning automatic temperature control method based on the temperature field cloud picture according to claim 3, wherein in the third step, the area in the temperature field cloud picture is converted into the area of the actual space by a pixel space-to-actual space conversion method, and the calculation process comprises:
in the formula, SsRepresenting the area of the real space above the temperature threshold region, SpThe area of the pixel above the temperature threshold region is represented, L and H respectively represent the length and width of the temperature field plane representing the actual plane, and M and N respectively represent the length and width of the temperature field cloud picture.
5. The method for automatically controlling the temperature of a granary air conditioner based on the temperature field cloud picture according to any one of claims 1-4, wherein T0, T1, T2 and T3 are 20 ℃, 25 ℃, 30 ℃ and 35 ℃ respectively.
6. The granary air-conditioning automatic temperature control method based on temperature field cloud picture of claim 5, wherein s0＝120㎡，s1＝100㎡，s2＝80㎡，s3＝60㎡。
7. The granary air-conditioning automatic temperature control method based on temperature field cloud picture of claim 6, wherein Δ s0＝1㎡/d、Δs1＝0.8㎡/d、Δs2＝0.6㎡/d、Δs3＝0.4㎡/d。
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