CN104663877A - Intelligent grain drying control method - Google Patents
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- CN104663877A CN104663877A CN201510080796.0A CN201510080796A CN104663877A CN 104663877 A CN104663877 A CN 104663877A CN 201510080796 A CN201510080796 A CN 201510080796A CN 104663877 A CN104663877 A CN 104663877A
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Abstract
The invention discloses an intelligent grain drying control method. According to the method, a temperature signal, a humidity signal and a grain moisture value are utilized for judging whether delayed-mode drying is required to be performed on grains or not and a heating control signal is obtained or other modes are started according to the judgment result, so that finally a target moisture value of the grains can be achieved. The intelligent grain drying control method can be used for achieving the intelligent management in a drying process, controlling the drying process by utilizes a fuzzy predictive control method, and adjusting drying time in a predictive way to adjust and control the grain drying time relatively accurately; the intelligent grain drying control method can be used for effectively overcoming a large delay link, shortening the adjusting time and eliminating the systematic quiet error.
Description
Technical field
The present invention relates to drying unit control field, particularly relate to the control method field for intelligent drying unit.
Background technology
China is large agricultural country, also be grain-production maximum in the world and consumer nation, present stage, China solved national problem of food and clothing, 2011, China's total output of grain is 500,015,000 tons, but learn according in the statistics in former years, China's grain from results after in threshing, Liao shines, C deposits and the loss of the aspect such as transport reaches 15%, considerably beyond the standard of 5% of FAO's defined, and field grain osses when much peasant receives to reduce, gather in the crops grain all in good time, but now grain moisture content is very large, going rotten of grain then must be caused rotten as dry not in time, according to statistics, annual germination because going mouldy waits the grain of loss up to 5%, especially in the province that south China plum rain season is longer, annual cereal goes rotten loss up to 10%, therefore for reducing grain loss, reduce rotten grain to come into the market, ensure that its people have relieved grain, development grain machinery dry technology, equally important with field mechanization of agriculture, also be Food Production, one of important leverage of good harvest.
Area northeastward, main cereal crops have corn, paddy rice, soybean etc., the annual autumn harvest time is between October to November, is just in time that northeast temperature enters the rapid drawdown stage, after large-scale harvester harvesting grain, a large amount of grain is difficult to obtain good drying, and the grain of high-moisture is directly put into storage warehouse by peasant, causes a large amount of grain to produce and goes mouldy, and foodstuff seed moisture large time will suffer freeze injury, seriously reduce germination percentage, can not safe overwintering, cause great loss.Therefore drop to before-5 DEG C in ambient temperature, must by seed drying to safe moisture, to ensure its vigorous vitality.
In the area of other applicable natural drying grains, adopt natural drying and mechanical drying to contrast, we can find, in fund input, on drying cost and efficiency and drying quality, the drying effect of drying machine is far above natural drying.
Along with united reaper promoting the use of in a lot of area of China that be efficient, good reliability, cereal drying mechanization has also progressively put on agenda.Foodstuff drying device can reduce grain contained humidity in time, reduces grain and to go mouldy loss, ensure seed quality, improve grain yield, reduce the labour intensity of peasant, and then raising farmers' income, plays a very important role to the storage of grain and quality guarantee.
China is from the high-temperature drier introducing the former Soviet Union fifties in last century, the scientific and technical personnel of China just start the research work to grain drying equipment, but the independently developed equipment of China compares external equipment, still relatively backward technically, automatization level is low, drying process falls behind, inefficiency, and after dry, grain quality is poor.Advanced drying process and equipment particularly have highly intelligentized dry automatic control system, the quality after grain processing and deep shaping property can be improved, boost productivity, reduce drying cost, thus the international competitiveness of China's grain can be improved, improve agricultural incomes, for China's agricultural modernization contributes, the situation that change China's drying process and equipment fall behind.Therefore, higher grain quality can be ensured in the urgent need to development and there is the drying equipment compared with high automation degree.
The automatic control of Grain Drying Process, to quality after guarantee grain heat-drying, reduces drying operation cost and boosts productivity significant, and to measure grain moisture content be fast and accurately realize the key that Grain Drying Process controls automatically.Many applicabilities of grain drier will be paid attention to further.Much regional in China, a kind of dryer can only dry a kind of grain, and be seasonal oven dry, can only leave unused at a lot of time machine, so be also an important field of research to the research of many practicality of drying machine, namely a kind of drying machine can adapt to the needs of plurality of cereals crop drying, namely adapts to the needs of different precipitation amplitude, the type that such as area uses northeastward will be accomplished to dry high-moisture corn, can dry again other crops such as paddy rice, soybean.
Summary of the invention
Object of the present invention is exactly to overcome above-mentioned prior art Problems existing, provides a kind of Multifunctional dryer, keeps grain quality, the economic loss that after reducing baking, grain quality ageing deterioration, degradation degradation produce and the wasting of resources.
For realizing object of the present invention, one aspect of the present invention provides a kind of intelligent grain heat-drying method, comprises the following steps:
In grain heat-drying process, judge that grain is the need of carrying out oven dry delay mode according to temperature signal, moisture signal and grain moisture content value;
When judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtain thermal control signals;
According to described thermal control signals, the heating-up temperature of described grain and heat time are controlled, makes grain reach target water score value.
Wherein, describedly judge that grain comprises the need of carrying out oven dry delay mode according to temperature signal and moisture signal:
Real-Time Monitoring is carried out to temperature signal, moisture signal, grain moisture content value;
Determine whether described grain moisture content value reaches desired value according to monitoring result;
If determine, described grain moisture content value does not reach desired value, then determine that described grain enters according to the temperature signal detected, moisture signal, grain moisture content value and dry delay mode and still terminate to dry delay mode and enter next program.
Wherein, described when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtaining thermal control signals is calculated by fuzzy prediction to obtain.
For realizing object of the present invention, the present invention provides a kind of intelligent grain heat-drying control device on the other hand, comprising:
According to moisture signal, temperature signal and grain moisture content signal, judge module, for during grain heat-drying, judges that the no needs of grain enter oven dry delay mode;
Acquisition module, for when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtains thermal control signals;
Control module, for according to described computer heating control, controls the heating-up temperature of described grain, makes the moisture value of grain reach target water score value.
Wherein, described judge module comprises:
Detecting unit, for carrying out Real-Time Monitoring to temperature signal, moisture signal, grain moisture content signal and heating-up temperature signal;
Determining unit, for determining according to monitoring result whether described grain reaches target water score value, and when determining that described grain does not reach target water score value, then determine that described grain enters according to the temperature signal that detects and moisture signal and dry delay mode and still terminate to dry delay mode and enter next program.
Whether preferably, described judge module also comprises according to fault detection unit, break down for checkout gear, makes described device enter troubleshooting pattern or automatically close.
Beneficial effect of the present invention embodies in the following areas:
1, intelligent grain heat-drying method of the present invention, can carry out the oven dry of cereal crops, and can carry out drying course regulation and control according to the temperature signal of drying unit, moisture signal and grain moisture content desired value, achieves the intelligent management of drying course.
2, intelligent grain heat-drying method of the present invention, adopts Fuzzy Predictive Control method to control drying course, can carry out the foresight adjustment of temperature in drying course, regulate and control grain heat-drying process more accurately, effectively overcome long time delay link, reduce regulating time, eliminate the static error of system.
Accompanying drawing explanation
Fig. 1 is the flow chart of the idle speed control of a kind of electric automobile that the embodiment of the present invention provides;
Fig. 2 is the schematic diagram of the idle speed controller of a kind of electric automobile that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Fig. 1 shows the one intelligent grain heat-drying control method flow chart that the embodiment of the present invention provides, and as shown in Figure 1, comprises the following steps:
According to temperature signal, moisture signal and grain moisture content value, step S101: in grain heat-drying process, judges that grain is the need of carrying out oven dry delay mode;
Step S102: when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtain thermal control signals;
Step S103: according to described thermal control signals, controls the heating-up temperature of described grain and heat time, makes grain reach target water score value.
Further, describedly judge that grain comprises the need of carrying out oven dry delay mode according to temperature signal and moisture signal:
Real-Time Monitoring is carried out to temperature signal, moisture signal, grain moisture content value;
Determine whether described grain moisture content value reaches desired value according to monitoring result;
If determine, described grain moisture content value does not reach desired value, then determine that described grain enters according to the temperature signal detected, moisture signal, grain moisture content value and dry delay mode and still terminate to dry delay mode and enter next program.
The present invention also comprises according to plant failure signal, makes described device terminate to dry delay mode and enters troubleshooting pattern.
Further, described when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtaining thermal control signals is calculated by fuzzy prediction to obtain; Wherein, described fuzzy prediction to calculate with desired temperature and the deviation e of prognoses system output valve and the rate of change ec of deviation as independent variable, if u is variable, arranges substantially dimmed subset and domain X, Y, Z of independent variable and variable respectively, that is:
E：{Ai|i＝1，…8}＝{NB，NM，NS，NO，PO，PS，PM，PB}
EC：{Bi|i＝1，…8}＝{NB，NM，NS，ZO，PS，PM，PB}
U：{Cij|i＝1，…8，j＝1，…7}＝{NB，NM，NS，ZO，PS，PM，PB}；
X＝{-6，-5，-4，-3，-2，-1，-0，+0，+1，+2，+3，+4，+5，+6}
Y＝{-6，-5，-4，-3，-2，-1，0，+1，+2，+3，+4，+5，+6}
Z＝{-7，-6，-5，-4，-3，-2，-1，-0，+0，+1，+2，+3，+4，+5，+6，+7}，
If a certain moment input independent variable x (x ∈ X), y (y ∈ Y), variable z (z ∈ Z) after change of scale, and each element on domain is determined its degree of membership according to fuzzy subset, obtain corresponding degree of membership table;
Further, dimmedization computing is liked using single-point fuzzy set, and adopts the Fuzzy Logic Reasoning Algorithm Rc compose operation of Mamdani, adopts minimax method to carry out the parameter self-tuning of fuzzy controller;
Further, DMC form is adopted to set up forecast model: the object prediction T model vector based on step response is a=[a1, a2 ... aN], N is modeling time domain.In t, apply controlling increment Du (t) to system, then the output vector of forecast model is:
y
PM(t)＝y
PO(t)+a·Du(t)
In formula, y
pOt () is the model prediction initial value in the N number of moment in future when t does not apply Du (t), y
pMt () is the model predication value in the N number of moment in future when t is applied with Du (t);
Further, if model and reality always can not be completely the same, if within certain a period of time, the deviation of predicted value and actual value is increasing and do not have the trend that reduces, just need to correct forecast model, subtract each other by the formula of t with (t-1) moment, adopt the least square method of recursion with forgetting factor, obtain adjustment step response vector, adjust.
Fig. 2 shows the schematic diagram of the idle speed controller of a kind of electric automobile that the embodiment of the present invention provides, and as shown in Figure 2, comprising: judge module 201, acquisition module 202 and control module 203.According to moisture signal, temperature signal and grain moisture content signal, described judge module 201, for during grain heat-drying, judges that the no needs of grain enter oven dry delay mode; Acquisition module 202, for when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtains thermal control signals; Control module 203, for according to described computer heating control, controls the heating-up temperature of described grain, makes the moisture value of grain reach target water score value.
Further, described judge module 201 comprises: detecting unit, for carrying out Real-Time Monitoring to temperature signal, moisture signal, grain moisture content signal and heating-up temperature signal; Determining unit, for determining according to monitoring result whether described grain reaches target water score value, and when determining that described grain does not reach target water score value, then determine that described grain enters according to the temperature signal that detects and moisture signal and dry delay mode and still terminate to dry delay mode and enter other programs.
The present invention also comprises according to plant failure signal, makes described device terminate to dry delay mode and enters troubleshooting pattern.That is, when drying unit breaks down, drying unit can cut out and dries delay mode, enter troubleshooting pattern, effectively prevent drying unit owing to not reaching design temperature or making device runaway conditions higher than design temperature for a long time for a long time.
In sum, the present invention has following technique effect:
The present invention it can judge whether grain enters oven dry delay mode accurately, heating-up temperature and the heat time of delay mode are dried in calculating accurately and fast, and can ensure that grain reaches the desired value of grain moisture content within the suitable time.
Although above-mentioned to invention has been detailed description; but be not limited thereto; those skilled in the art can principle according to the present invention modify, and therefore, all various amendments carried out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (6)
1. an intelligent grain heat-drying control method, is characterized in that, comprise the following steps:
In grain heat-drying process, judge that grain is the need of carrying out oven dry delay mode according to temperature signal, moisture signal and grain moisture content value;
When judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtain thermal control signals;
According to described thermal control signals, the heating-up temperature of described grain and heat time are controlled, makes grain reach target water score value.
2. method according to claim 1, is characterized in that, according to temperature signal and moisture signal, described judges that grain comprises the need of carrying out oven dry delay mode:
Real-Time Monitoring is carried out to temperature signal, moisture signal, grain moisture content value;
Determine whether described grain moisture content value reaches desired value according to monitoring result;
If determine, described grain moisture content value does not reach desired value, then determine that described grain enters according to the temperature signal detected, moisture signal, grain moisture content value and dry delay mode and still terminate to dry delay mode and enter next program.
3. according to the arbitrary described method of claim 1-2, it is characterized in that, described when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtaining thermal control signals is calculated by fuzzy prediction to obtain.
4. an intelligent grain heat-drying control device, is characterized in that, comprising:
According to moisture signal, temperature signal and grain moisture content signal, judge module, for during grain heat-drying, judges that the no needs of grain enter oven dry delay mode;
Acquisition module, for when judging that grain needs to enter oven dry delay mode, according to temperature signal and moisture signal, obtains thermal control signals;
Control module, for according to described computer heating control, controls the heating-up temperature of described grain, makes the moisture value of grain reach target water score value.
5. device according to claim 4, is characterized in that, described judge module comprises:
Detecting unit, for carrying out Real-Time Monitoring to temperature signal, moisture signal, grain moisture content signal and heating-up temperature signal;
Determining unit, for determining according to monitoring result whether described grain reaches target water score value, and when determining that described grain does not reach target water score value, then determine that described grain enters according to the temperature signal that detects and moisture signal and dry delay mode and still terminate to dry delay mode and enter next program.
6. device according to claim 5, is characterized in that, also comprises according to plant failure signal, makes described device terminate to dry delay mode and enters troubleshooting pattern.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105941616A (en) * | 2016-07-14 | 2016-09-21 | 吉林省农业科学院 | Vacuum grain dryer and drying method |
| CN106227038A (en) * | 2016-07-29 | 2016-12-14 | 中国人民解放军信息工程大学 | Grain drying tower intelligent control method based on neutral net and fuzzy control |
| CN106889184A (en) * | 2017-02-28 | 2017-06-27 | 安徽广深机电设备有限公司 | A kind of method of grain heat-drying |
| CN106900844A (en) * | 2017-02-28 | 2017-06-30 | 安徽广深机电设备有限公司 | A kind of foodstuff adustion system |
| CN106932546A (en) * | 2017-03-02 | 2017-07-07 | 安徽广深机电设备有限公司 | The paddy MOISTURE MEASUREMENT SYSTEM and detection method of a kind of crop dryer |
| CN107467182A (en) * | 2017-09-22 | 2017-12-15 | 宿松县佳兴米业有限公司 | A kind of grain drying automatic processing method |
| CN107646969A (en) * | 2017-09-22 | 2018-02-02 | 宿松县佳兴米业有限公司 | A kind of intelligent rice drying control system |
| CN108241290A (en) * | 2017-12-19 | 2018-07-03 | 中国农业生产资料流通协会 | A kind of warehouse recirculation fumigation control method based on fuzzy-adaptation PID control |
| CN108285934A (en) * | 2017-12-31 | 2018-07-17 | 广德大金机械有限公司 | A kind of Intelligentized regulating and controlling system of leather processing baking oven |
| CN110347197A (en) * | 2019-07-12 | 2019-10-18 | 吉林大学 | A kind of continuous drying window control method of grain based on temperature zone |
| CN115854706A (en) * | 2023-02-09 | 2023-03-28 | 广州惠特节能科技有限公司 | Intelligent control method and system for dryer |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105941616A (en) * | 2016-07-14 | 2016-09-21 | 吉林省农业科学院 | Vacuum grain dryer and drying method |
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| CN106227038A (en) * | 2016-07-29 | 2016-12-14 | 中国人民解放军信息工程大学 | Grain drying tower intelligent control method based on neutral net and fuzzy control |
| CN106889184A (en) * | 2017-02-28 | 2017-06-27 | 安徽广深机电设备有限公司 | A kind of method of grain heat-drying |
| CN106900844A (en) * | 2017-02-28 | 2017-06-30 | 安徽广深机电设备有限公司 | A kind of foodstuff adustion system |
| CN106932546A (en) * | 2017-03-02 | 2017-07-07 | 安徽广深机电设备有限公司 | The paddy MOISTURE MEASUREMENT SYSTEM and detection method of a kind of crop dryer |
| CN107467182A (en) * | 2017-09-22 | 2017-12-15 | 宿松县佳兴米业有限公司 | A kind of grain drying automatic processing method |
| CN107646969A (en) * | 2017-09-22 | 2018-02-02 | 宿松县佳兴米业有限公司 | A kind of intelligent rice drying control system |
| CN108241290A (en) * | 2017-12-19 | 2018-07-03 | 中国农业生产资料流通协会 | A kind of warehouse recirculation fumigation control method based on fuzzy-adaptation PID control |
| CN108285934A (en) * | 2017-12-31 | 2018-07-17 | 广德大金机械有限公司 | A kind of Intelligentized regulating and controlling system of leather processing baking oven |
| CN110347197A (en) * | 2019-07-12 | 2019-10-18 | 吉林大学 | A kind of continuous drying window control method of grain based on temperature zone |
| CN115854706A (en) * | 2023-02-09 | 2023-03-28 | 广州惠特节能科技有限公司 | Intelligent control method and system for dryer |
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