CN105300092A - Continuous grain drying water online measuring and controlling method and system based on mass flow method - Google Patents

Abstract

The invention discloses a continuous grain drying water online measuring and controlling method and system based on a mass flow method. The weight of a dryer is measured through a weighing sensor, and a grain weight change value inside the dryer is utilized for calculating the real-time water content of dried grain. The invention further provides a grain drying water time regulating and controlling method based on the mass flow method. The drying time of the dryer is regulated and controlled in real time, and the actual dried grain water content and the target water content are controlled to be within the error range through a plurality of steps of small-amplitude adjustment. The method and system have the beneficial effect that the water content of the dried grain can be accurately calculated, the grain drying process can be precisely controlled, the dried grain water content and the target water content are controlled to be within the error range, and meanwhile excessive adjustment caused by excessively-large amplitude of one-time adjustment is avoided.

Description

Based on continous way grain dry moisture on-line investigating method and the system of matter stream method

Technical field

The present invention relates to a kind of crop dryer moisture on-line investigating method, be particularly a kind ofly suitable for the moisture on-line investigating method based on matter stream method of continous way crop dryer and a kind of time-controllable method of the grain dry moisture based on matter stream method.

Background technology

The elementary object of grain drying be keep dry process stabilization prerequisite under, remove the moisture in grain with minimum drying cost and energy consumption.Therefore, in Grain Drying Process, the online monitoring method of moisture is most important to grain drying work.

Traditional grain drying moisture on-line observing and controlling is on the basis based on capacitance method or the observing and controlling of electric-resistivity method moisture on-line, adopts switch control rule, classical PID to control or modern Intelligent predictive control method is carried out.But detect and affect by humiture, poor stability, control accuracy is not high.In recent years, domestic appearance adopts gross weight method to carry out recent studies on and the new product of moisture on-line detection and control.

" a kind of continous way Grain Drying Process moisture on-line detection method " patent No. CN103808591A of earlier application, this patent relates to a kind of moisture on-line detection method based on total re-detection of continous way crop dryer, the method utilizes the relation of moisture and unit weight to calculate moisture, and the method has the advantages such as precision height and good stability based on gravimetric analysis sensing method.But the method can only calculate the average moisture of grain in drying machine in dry run, and directly can not draw moisture content of outlet, moisture content of outlet needs to calculate with drying model, causes certain error.And the Realtime Level change of the method by adopting laser or blocking rotary type level sensor to measure dryer inner cereal, calculate corresponding volume, by cereal stockpile shape is uncertain etc., factor affects, and volume computing is inaccurate, and moisture meter also can be caused to calculate existing deviation.

Summary of the invention

An object of the present invention is to provide a kind of method calculating the real-time moisture of cereal after drying.

A further object of the invention provides the method for a kind of controllable drying machine drying time, the method adjustment drying time of being adjusted slowly by small step, namely adjusted by a small margin by some steps, control dry after actual grain moisture and Target moisture in error range, avoid that single adjusting range is excessive causes accommodative excess.

A further object of the invention provides a kind of continous way grain dry automatic operating system, adopts interval to enter the drying operation mode of grain and row's grain.

In order to realize, according to these objects of the present invention and other advantage, providing a kind of continous way grain dry moisture on-line investigating method based on matter stream method, comprise the following steps:

Step one, starts drying machine and starts drying, through entering the grain time and entering grain Δ stabilization time ζ _1i, free time Δ ζ _ai, row's grain time and row's grain Δ stabilization time ζ _2iafter complete one arid cycle Δ ζ _i, what calculate i-th cycle enters grain quality W _1i:

W _1i＝WH _i-WL _i-1+((WH _i-WM _i)/Δξ _ai)·Δξ _1i

Wherein, WH _iit is the high charge level quality of drying machine after entering grain i-th time and entering grain stabilization time; WL _i-1be the i-th-1 time row's grain and the low material level quality of drying machine after row grain stabilization time; WM _iit is drying machine quality after i-th free time; Δ ζ _1ibe enter the grain time for i-th time and enter grain stabilization time; Δ ζ _aiit is i-th free time; I represents arid cycle;

Step 2, calculates row's grain quality W in i-th cycle _2i:

W _2i＝WH _i-WL _i-((WH _i-WM _i)/Δξ _ai)·(Δξ _2i+Δξ _ai)

Wherein, WL _ibe i-th row's grain and the low material level quality of drying machine after row grain stabilization time; Δ ζ _2iit is i-th row's grain time and row grain stabilization time;

Step 3, calculates drying machine i-th row's grain moisture M _2i:

$M_{2i}=1-\frac{W_{1i}(1-M_{1i})}{W_{2i}}$

Wherein, M _1iit is the grain moisture content entering drying machine i-th time.

Preferably, wherein, described drying machine through entering grain and stabilization time Δ ζ _1iafter stop into grain, through free time Δ ζ _aiafter start to arrange grain, through row's grain and row's grain Δ stabilization time ζ _2irear stopping row grain, enters grain and hockets with row's grain interval, and at Δ ζ arid cycle _iinside all carrying out continuous drying operation.

Preferably, wherein, described arid cycle Δ ζ _icomputing formula be:

Δζ _i＝Δζ _1i+Δζ _2i+Δζ _ai

Wherein, Δ ζ _ifor i-th arid cycle of drying machine.

Preferably, wherein, described drying machine adopts the operating type of two limit material level interval row grain, when grain in solid food storehouse reaches upper limit level sensor position, automatically starts row's grain conveyer, starts to arrange grain; When grain in solid food storehouse is lower than lower limit level sensor position, automatically stop row's grain conveyer, stop row's grain.

Object of the present invention also realizes by a kind of time-controllable method of the grain dry moisture based on matter stream method, comprises the following steps:

Step one, before calculating, in i arid cycle, m arid cycle arranges grain moisture rolling cumulative mean MB _2i;

${\mathrm{MB}}_{2i}=\underset{j=i-m+1}{\overset{i}{\Σ}}(M_{2j}/m)$

Wherein, m is rolling accumulative frequency; WB _1ifor the grain quality of entering of m arid cycle in the front i arid cycle is rolled cumulative; WB _2irow's grain quality for m arid cycle in the front i arid cycle is rolled cumulative;

Step 2, when | MB _2i-M _t| during > δ, calculate the maximal adjustment time Δ in next cycle and i+1 cycle _large:

${\mathrm{\Δ}}_{l\arg e}=(\frac{{\mathrm{WBYT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\×\frac{{\mathrm{\Δ\ζB}}_i}{m}$

Wherein, WBT _ifor in front i cycle period, m actual dehydration arid cycle quality is rolled cumulative; Δ ζ B _idrying time for m arid cycle in the front i arid cycle rolls cumulative; WBYT _i+1desired dehydration quality for m arid cycle in front i+1 arid cycle is rolled cumulative; M _tfor target water score value; δ is moisture deviation;

Step 3: to maximal adjustment time Δ _largethe mode adopting small step to adjust slowly adjusts:

${\mathrm{\Δ}}_{small}=\frac{{\mathrm{\Δ}}_{l\arg e}}{l}=(\frac{{\mathrm{WYBT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\×\frac{{\mathrm{\Δ\ζB}}_i}{m}\×\frac{1}{l}$

Wherein, Δ _smallfor the minimum regulation time of single; L is the step number that small step is adjusted slowly;

Step 4, calculates Δ ζ cycle time in the i-th+1 time cycle _i+1:

Work as MB _2i-M _tduring > δ, then increase the free time of drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai+ Δ _small;

Work as MB _2i-M _tduring=δ, then the free time of drying machine is constant, Δ ζ _{a (i+1)}=Δ ζ _ai;

Work as MB _2i-M _tduring <-δ, then reduce the free time of drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai-Δ _small;

Step 5: before calculating, in i+1 arid cycle, m arid cycle arranges grain moisture rolling cumulative mean MB _{2 (i+1)}as long as, | MB _{2 (i+1)}-M _t| > δ, repeat step one to step 4, until | MB _{2 (i+1)}-M _t| during≤δ, stop adjustment.

Preferably, wherein, Δ ζ B in described step 3 _icomputing formula is:

${\mathrm{\&Delta;\&zeta;B}}_i=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}({\mathrm{\&Delta;\&zeta;}}_{1j}+{\mathrm{\&Delta;\&zeta;}}_{2j}+{\mathrm{\&Delta;\&zeta;}}_{aj})$

Wherein, Δ ζ B _itime for m arid cycle in i arid cycle rolls cumulative.

Preferably, wherein, before in described step 3, the dehydration quality rolling of m arid cycle adds up WBT in i cycle period _icomputing formula is:

${\mathrm{WBT}}_i=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(W_{1j}-W_{2j})$

In formula, W _1jfor j time enters grain quality; W _2jfor j time is discharged grain quality.

Preferably, wherein, the cumulative WYBT of quality rolling that should dewater in described step 3 _icomputational methods are as follows:

${\mathrm{WBYT}}_i={\mathrm{WB}}_{1i}\&times;(1-\frac{1}{1-M_T}\&times;\left(1-\underset{j=x-m+1}{\overset{1}{\&Sigma;}}\left(M_{1j}/m\right)\right)$

Wherein, WB _1ifor the grain quality of entering of m arid cycle in the front i arid cycle is rolled cumulative.

Object of the present invention also realizes by a kind of continous way grain dry automatic operating system, comprise: wet grain grain storehouse before tower, the plate installed bottom it enters drying machine main body for controlling cereal interval, and before described tower, wet grain grain storehouse is positioned at the side of drying machine main body;

The temporary warehouse of solid food after tower, it is for the grain after storing and drying, and after described tower, the temporary warehouse of solid food is positioned at the opposite side of drying machine main body;

Drying machine main body, is divided into grain storage section, dryer section, cooling section and draining crop mechanism from top to bottom in it, for drying grain;

LOAD CELLS, it is for taking the mass change of grain in drying machine main body, and described LOAD CELLS is arranged on the bottom of drying machine main body.

Preferably, it adopts interval to enter the drying operation mode of grain and row's grain, and by control plate, control cereal interval enters in drying machine main body carries out drying, and by controlling draining crop mechanism running, control cereal is intermittently discharged drying machine main body and terminated drying.

The present invention at least comprises following beneficial effect: 1, by the weight of LOAD CELLS Real-Time Monitoring drying machine, directly draw dry rear grain moisture, thus adjustment to control drying time dry after grain moisture with Target moisture in error range, the grain dry moisture of precisely control.2, the precision of water content detection universe be better than ± 0.5%, dry run implementation goal is controlled, Control for Speed Limitation and constant speed controls, not only increase the automaticity of drying machine, and energy-saving drying and preserved drying can be realized.

Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.

Accompanying drawing explanation

Fig. 1 is drying system operation process chart of the present invention.

Fig. 2 is drying system superstructure schematic diagram of the present invention.

Fig. 3 is drying system substructure schematic diagram of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to description word to make those skilled in the art.

Should manage, used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.

Step one, job initialization: the initial average water score value M inputting and store cereal to be dried in the control display unit of drying machine ₀, target water score value M _t, thermal medium humiture T, row grain frequency G _g;

Step 2, detection tare weight: LOAD CELLS group is installed in drying machine bottom, and LOAD CELLS detects the weight of drying machine, and the weight of drying machine comprises the weight of drying machine main body and Qi Nei cereal; Under the state of dryer inner without grain, LOAD CELLS group is utilized the signal of telecommunication to be detected, LOAD CELLS group connection signal detecting and transform unit, signal test and conversion unit converts electrical signals to weight signal, signal test and conversion unit connection control display unit, is detected by control display unit, reads and store tare weight W _b;

Step 3, enter grain operation first: adopt two limit Level control to start into grain operation, start drying machine manually or automatically and enter grain, in drying machine, carry high moisture grains to be dried, when cereal in drying machine reaches upper level sensor position, automatically stop into grain; When cereal in drying machine is lower than lower level sensor position, again start into grain device;

Step 4, the operation of startup continuous drying: by certain hour interval and sequence starting air-introduced machine, heater and delivery device, drying machine is through entering the grain time and entering grain Δ stabilization time ζ _1i, free time Δ ζ _ai, row's grain time and row's grain Δ stabilization time ζ _2iafter complete one arid cycle Δ ζ _i.

Δζ _i＝Δζ _1i+Δζ _2i+Δζ _ai(1)

Step 5, monitoring continuous drying process, obtain the cumulative MB of drying machine row grain moisture rolling _2i:

1., in i-th arid cycle, grain is entered and high charge level quality WH after stabilization time by controlling to detect, read and store single with display unit _i, quality WM after free time _i, single row's grain and low material level quality WL after stabilization time _i, enter grain average moisture M _1i, calculate single with this and enter grain quality W _1i, enter dry biomass WG _1i, enter water quality WS _1i, single row grain quality W _2i, discharge water quality WS _2i, dehydration quality WT _igrain moisture M is arranged with single _2i, i.e. formula (2)-(8).

W _1i＝WH _i-WL _i-1+((WH _i-WM _i)/Δξ _ai)·Δξ _1i(2)

W _2i＝WH _i-WL _i-((WH _i-WM _i)/Δξ _ai)·(Δξ _2i+Δξ _ai)(3)

WG _1i＝W _1i·(1-M _1i)(4)

WS _1i＝W _1i·M _1i(5)

WS _2i＝W _2i-WG _1i(6)

WT _i＝WS _1i-WS _2i(7)

$M_{2i}=1-\frac{{\mathrm{WG}}_{1i}}{W_{2i}}---\left(8\right)$

Wherein, WH _ihigh charge level quality after the drying machine measured for LOAD CELLS enters grain i-th time and enters grain stabilization time, kg; WM _ifor quality after i-th free time of drying machine that LOAD CELLS is measured, kg; WL _isingle row's grain after the drying machine measured for LOAD CELLS enters grain i-th time and enters grain stabilization time and low material level quality after stabilization time, kg; M _1ibe enter grain moisture content value i-th time; W _1ibe that No. i-th drying machine single enters grain quality, kg; WG _1ibe enter drying machine dry biomass, kg i-th time; WS _1ibe that No. i-th drying machine enters water quality, kg; W _2ibe i-th single row grain quality, kg; WS _2ibe discharge water quality, kg i-th time; WT _ibe i-th dehydration quality, kg; M _2ibe i-th single row grain moisture, kg; Δ ζ _aibe i-th free time, s; Δ ζ _1ibe enter the grain time for i-th time and enter grain stabilization time, s; Δ ζ _2ibe i-th row's grain time and row grain stabilization time, s; I is number arid cycle, i=1,2,3LLn.

Now introduce concept: roll cumulative, namely in a front i arid cycle, the corresponding data of wherein m arid cycle is summed up.Rolling cumulative mean, namely in i arid cycle the corresponding data rolling of m arid cycle add up after divided by m.

Grain quality will be entered, enter dry biomass, enter water quality, and row's grain quality, discharge water quality, dehydration quality and carry out rollings arid cycle and add up, and namely obtain and to add up WB into the rolling of grain quality _1i, enter dry biomass rolling cumulative mean WBG _1i, enter water quality and to roll cumulative WBS _1i, row's grain quality rolls cumulative WB _2i, discharge water quality and to roll cumulative WBS _2i, dehydration quality rolls cumulative WBT _iwith the cumulative Δ ζ B that rolls arid cycle _i, i.e. formula (9)-(15).

${\mathrm{WB}}_{1i}=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}{W}_{1j}---\left(9\right)$

${\mathrm{WB}}_{2i}=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}{W}_{2j}---\left(10\right)$

${\mathrm{WBG}}_{1i}={\mathrm{WB}}_{1i}\&CenterDot;(1-\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(M_{1j}/m\left)\right)---\left(11\right)$

${\mathrm{WBS}}_{1i}={\mathrm{WB}}_{1i}\&CenterDot;\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(M_{1j}/m)---\left(12\right)$

WBS _2i＝WB _2i-WBG _1i(13)

WBT _i＝WBS _1i-WBS _2i(14)

${\mathrm{\&Delta;\&zeta;B}}_i=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}({\mathrm{\&Delta;\&zeta;}}_{1j}+{\mathrm{\&Delta;\&zeta;}}_{2j}+{\mathrm{\&Delta;\&zeta;}}_{aj})---\left(15\right)$

Row's grain moisture rolling cumulative mean MB is calculated according to formula (8)-(14) _2i:

${\mathrm{MB}}_{2i}=1-\frac{{\mathrm{WB}}_{1i}}{{\mathrm{WB}}_{2i}}\&CenterDot;(1-\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(M_{1j}/m\left)\right)---\left(16\right)$

${\mathrm{MB}}_{2i}=1-\frac{\underset{j=i-m+1}{\overset{i}{\&Sigma;}}({\mathrm{WH}}_j-{\mathrm{WL}}_{j-1}+({\mathrm{WH}}_j-{\mathrm{WM}}_j)\&times;\frac{{\mathrm{\&Delta;\&xi;}}_{1j}}{{\mathrm{\&Delta;\&xi;}}_{aj}})}{\underset{j=i-m+1}{\overset{i}{\&Sigma;}}({\mathrm{WH}}_j-{\mathrm{WL}}_j-({\mathrm{WH}}_j-{\mathrm{WM}}_j)\&times;\frac{{\mathrm{\&Delta;\&xi;}}_{2j}+{\mathrm{\&Delta;\&xi;}}_{aj}}{{\mathrm{\&Delta;\&xi;}}_{aj}})}\&CenterDot;(1-\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(M_{1j}/m\left)\right)---\left(7\right)$

Wherein, WB _1ifor the grain quality of entering of m arid cycle in the front i arid cycle is rolled cumulative, kg; WBG _1idry biomass rolling cumulative mean is entered, kg for m arid cycle in the front i arid cycle; WBS _1ifor the water quality that enters of m arid cycle in the front i arid cycle is rolled cumulative, kg; WB _2irow's grain quality for m arid cycle in the front i arid cycle is rolled cumulative, kg; WBS _2idischarge water quality for m arid cycle in the front i arid cycle is rolled cumulative, kg; WBT _idehydration quality for m arid cycle in the front i arid cycle is rolled cumulative, kg; MB _2irow's grain moisture for m arid cycle in the front i arid cycle rolls cumulative mean value; Δ ζ B _ifor in the front i arid cycle, m time arid cycle rolls cumulative, s; M is rolling accumulative frequency, m=1,2,3LLn; A=i-m+1, positive integer.

Step 6, control continuous drying process: by the cumulative MB of the row's of calculating grain moisture rolling _2iwith Target moisture M _tcomparison, control free time Δ ζ _ai, i.e. the residence time of cereal in drying machine, the namely speed of grain dry, makes the moisture of cereal maintain in setting moisture value zone of reasonableness.Moisture content of outlet is high, increases free time, namely increases the single cycle operation time of cereal in drying machine; Moisture content of outlet is low, reduces free time, namely reduces the single cycle operation time of grain in drying machine.

Work as MB _2i-M _tduring > δ, then increase the time of cereal in drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai+ Δ;

Work as MB _2i-M _tduring=δ, then the time of cereal in drying machine is constant, Δ ζ _{a (i+1)}=Δ ζ _ai;

Work as MB _2i-M _tduring <-δ, then reduce the time of cereal in drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai-Δ;

Wherein, δ is the cumulative moisture deviation of row's grain moisture rolling; Δ ζ _{a (i+1)}be the i-th+1 time free time, s; Δ is single regulation time, s;

Following steps are all with MB _2i-M _tbe that example calculates during > δ.

Suppose into the grain time and enter grain Δ stabilization time ζ _1iwith row's grain time and row's grain constant for stabilization time, calculate time in the i-th+1 time cycle according to formula (18):

Δζ _i+1＝Δζ _1i+Δζ _ai+Δζ _2i+Δ＝Δζ _i+Δ(18)

Step 7, etc. heavy Timing:

1. grain average moisture M is entered according to cereal to be dried _1i, target water score value M _t, single enters grain quality W _1iand enter the cumulative WB of grain quality rolling _1i, calculate single and should to dewater quality WYT _iand the rolling of quality of should dewatering adds up WBYT _i, i.e. formula (19)-(21);

${\mathrm{WYT}}_i=W_{1i}-\frac{{\mathrm{WG}}_{1i}}{(1-M_T)}---\left(19\right)$

${\mathrm{WBYT}}_i={\mathrm{WB}}_{1i}-\frac{{\mathrm{WBG}}_{1i}}{(1-M_T)}---\left(20\right)$

${\mathrm{WBYT}}_i={\mathrm{WB}}_{1i}\&times;(1-\frac{1}{1-M_T}\&times;(1-\underset{j=i-m+1}{\overset{i}{\&Sigma;}}\left(M_{1j}/m\right))---\left(21\right)$

Wherein, WYT _ifor reaching target water score value M in single arid cycle _tquality of should dewatering, kg; WBYT _ithat the rolling of the quality of should dewatering of m arid cycle in the front i arid cycle adds up, kg;

2. suppose that environment and the process conditions of drying are constant, remove high low-moisture specific energy consumption identical, according to the cumulative WBT of reality dehydration quality rolling _ithe cycleoperation time rolling cumulative Δ ζ B corresponding with it _iderive next cycle quality of should dewatering to roll cumulative WBYT _ithe corresponding cumulative Δ ζ B of cycleoperation time rolling _i+1, i.e. formula (22).

WBT _i:ΔζB _i＝WBYT _i+1:ΔζB _i+1＝WBYT _i+1:(ΔζB _i+m×Δ _large)(22)

Wherein, Δ ζ B _ifor the time of m arid cycle in the front i arid cycle adds up, s; Δ ζ B _i+1for the time of m arid cycle in the front i+1 arid cycle adds up, s; Δ _largefor single maximal adjustment time, s.

Single regulation time Δ is calculated according to formula (15), (18) and (22) _large:

${\mathrm{\&Delta;}}_{l\arg e}=(\frac{{\mathrm{WYBT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\&times;\frac{{\mathrm{\&Delta;\&zeta;B}}_i}{m}---\left(23\right)$

Step 8: adopt the mode of " small step is adjusted slowly " to adjust next operational cycle time, when | MB _{2 (i+1)}-M _t| stop adjustment during≤δ." small step is adjusted slowly " refers to and is divided into some steps whole the time average of once required adjustment, avoids that single adjusting range is excessive causes accommodative excess.

Δ _large＝Δ _small×l(24)

Wherein, Δ _smallfor the minimum regulation time of single, s; L is the step number once adjusted, integer.

Δ is calculated according to formula (9)-(14), (21)-(24) _small:

${\mathrm{\&Delta;}}_{small}=(\frac{{\mathrm{WBYT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\&times;\frac{{\mathrm{\&Delta;\&zeta;B}}_i}{m\&CenterDot;l}---\left(25\right)$

2. next cycleoperation time Δ ζ _i+1for:

Δζ _i+1＝Δζ _i+Δ _small(26)

Step 9:

Before calculating, in i+1 arid cycle, m arid cycle arranges grain moisture rolling cumulative mean MB _{2 (i+1)}as long as, | MB _{2 (i+1)}-M _t| > δ, repeat step one to step 4, until | MB _{2 (i+1)}-M _t| during≤δ, stop adjustment.

A kind of continous way grain dry moisture on-line TT&C system case based on matter stream method as shown in Figure 1,2 and 3.This system mainly comprises wet grain before tower and enters the temporary storage device of solid food, sensor group and control unit after grain device, drying device, tower.

Wet grain enters grain device and comprises before tower: conveyer 113, wet grain grain storehouse warehouse lower plugboard 114 at the bottom of receiving sieve front conveyor 111, receiving sieve 112, wet silo, enter grain hopper 115, wet silo before elevator 116, wet grain grain storehouse 117, wet silo enter grain grain downflow tube 118 and tower advance grain elevator 119 before tower.

Drying device comprises: drying machine enters conveyer 127, air-heater 128, drying machine main body 129 at the bottom of grain grain downflow tube 121, grain storage section 122, dryer section 123, hot-flow flue 124, cooling section 125, draining crop mechanism 126, tower.

After tower, the temporary storage device of solid food comprises: arrange grain elevator 131 after tower, solid food storehouse enters conveyer 134 at the bottom of solid food storehouse 133 after grain grain downflow tube 132, tower, solid food storehouse; Grain conveyer 136 is arranged behind solid food awning 135 and solid food storehouse.

Control unit comprises: control and display unit 141, signal test and conversion unit 142.

Sensor group comprises: drying machine gross weight (containing cereal) LOAD CELLS group 151, level sensor 152 and temperature sensing head group.

Drying machine main body 129 is followed successively by grain storage section 122, dryer section 123, cooling section 125, draining crop mechanism 126 from top to bottom.Grain storage section 122 effect is stored up temporarily by the grain entering dryer inner, waits for entering in dryer section 123 and carry out drying.Preferred as one, drying machine main body level sensor group 152 is arranged on grain storage section 122.Preferred as one, for increasing drying machine drying capacity and rate of drying, dryer inner is provided with multiple dryer section 123, cereal is after multilevel drying, enter cooling section 125 to cool, if the moisture of cereal meets the requirements, cereal enters grain grain downflow tube 132 and enters solid food storehouse 133 after tower through conveyer 131 at the bottom of conveyer 127, tower and solid food storehouse at the bottom of draining crop mechanism 126, tower.Preferred as one, after tower, solid food storehouse level sensor group 152 is arranged on top, solid food storehouse 133 after tower, and level sensor group 152 comprises level sensor and lower level sensor.

Drying machine gross weight (containing cereal) LOAD CELLS group 151 comprises several LOAD CELLSs, on the column bottom being installed on drying machine base or column.The mounting means of LOAD CELLS can be determined according to the type of sensor.As preferred further, LOAD CELLS group 151 forms with the LOAD CELLS of more than 4 that adopt principle, structure, size, material, range and precision all identical.When in drying machine main body 129 during cereal weight change, drying machine pedestal upright post is born pressure and is produced deformation, and now LOAD CELLS 151 also produces deformation, and foil gauge resistance changes, be converted into voltage signal through bridge circuit, voltage signal is transferred to signal conversion and detecting unit 142.

Voltage signal is collected and conversion by signal detection and converting unit 142.This unit is by amplification filtering circuit, analog to digital conversion circuit, house dog circuit, MCU signal processor, RS485 serial communication railway superstructures.

By preposition for amplification filtering circuit, with this stress release treatment and amplifying signal.Be connected with analog-to-digital conversion circuit again, be responsible for analog signal being converted into the data signal that can be received by host computer.Again MCU signal processing circuit is connected with analog-to-digital conversion circuit, is responsible for processing the data signal accepted.House dog circuit is connected with MCU circuit, prevents the phenomenons such as locked, the loss of program.Finally the signal handled well is connected with control display unit 141 by RS485 serial communication circuit.

Temperature signal in environment temperature, drying machine main body 129 is transferred to MCU signal processing circuit by temperature sensing head group.Level sensor group 152 is connected with signal test and conversion unit 142, to judge the height of grain in solid food storehouse 133 after drying machine main body 129 and tower.Preferred as one, level sensor group 152 can adopt infrared laser level sensor or Anti-rotation type material level switch.

When MCU system cloud gray model, losing for preventing such as program from running, storing inefficacy, external disturbance or operating some phenomenons generations such as incorrect, system is caused to enter endless loop and cannot normally work, need increase watchdog circuit, the basic function of watchdog circuit makes program initialization after running software generation problem and misprogramming.So just can reset at once when system runs into interference like this, the so perfect to a great extent job stability of machine self.At this moment, then by digitlization, stable, to give through the Signal transmissions of computing and control and display unit 141.

During drying operation, first to carry out just clear, impurity elimination by receiving sieve 112 to cereal to be dried.Cereal after cleaning impurity elimination elevator 116, wet silo before wet silo enter grain grain downflow tube 118, and before entering tower, wet grain grain storehouse 117 stores up temporarily.By the plate 114 controlled under warehouse can realize cereal interval discharge tower before wet grain grain storehouse 117, via conveyer at the bottom of wet silo 113 with enter grain hopper 115 and enter tower advance grain elevator 119.Cereal is transported to the upper top of drying machine main body 129 by tower advance grain elevator 119 from bottom to top, entering grain elephant trunk 121 through the drying machine between tower advance elevator 119 and drying machine main body 129 is evenly sprinkled in drying machine main body 129 by cereal, cereal leans on gravity downwards respectively through grain storage section 122, dryer section 123, cooling section 125, the side, installation air channel of drying machine main body 129, adopt air blast mode to be blasted in drying machine by thermal medium and carry out dried grain, six vane type draining crop mechanisms 126 are entered after multilevel drying, cereal interval can be realized by control draining crop mechanism 126 to discharge and the row's of control grain speed from draining crop mechanism.Cereal, after draining crop mechanism 126 is discharged, sends into conveyer 131 at the bottom of tower by conveyer at the bottom of tower 127.Through conveyer at the bottom of tower 131, cereal is transported to from bottom to top the upper top in solid food storehouse 133 after tower, solid food storehouse after conveyer at the bottom of tower 131 and dry tower between solid food storehouse 133 is entered grain grain downflow tube 132 and to be sprinkled into by cereal after tower in solid food storehouse, complete whole dry run, solid food awning 135 to be entered stores.

As further preferably, during drying operation, enter grain process and carry out with row's grain process interval, namely enter that grain process does not arrange grain, row's grain process does not enter grain, accurately can calculate single with this and enter grain and row's grain weight.As preferred further, the of short duration stable time of staying all will be had after single enters grain and arranges grain process, namely neither enter grain and also do not arrange the grain time, like this, vibration and single can be avoided to enter grain or arrange grain not exclusively on the impact of the accuracy of detection of the total weight sensor group 121 of drying machine.

As preferred further, after tower, solid food storehouse 133 adopts two spacing Level control, namely when cereal height in solid food storehouse 133 after tower is higher than high charge level sensor 152, cereal is discharged by solid food storehouse 133 after tower, and conveyer 134 is delivered in grain storehouse or transportation vehicle at the bottom of solid food storehouse; When in solid food storehouse 133 after tower, cereal height is lower than low level sensor 152, after tower, solid food storehouse 133 stops row's grain.

In sum, the realization of the investigating method detected by the continous way grain moisture completed the manipulation of the TT&C system based on cereal gross weight water content detection based on matter stream method.

The present invention at least comprises following beneficial effect: 1, by the weight of LOAD CELLS Real-Time Monitoring drying machine, directly draw dry rear grain moisture, thus adjustment to control drying time dry after grain moisture with Target moisture in error range, the grain dry moisture of precisely control.2, the precision of water content detection universe be better than ± 0.5%, dry run implementation goal is controlled, Control for Speed Limitation and constant speed controls, not only increase the automaticity of drying machine, and energy-saving drying and preserved drying can be realized.

Although embodiment of the present invention are open as above, it is not restricted to listed in description and embodiment utilization.It can be applied to various applicable the field of the invention completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.

Claims (10)

1., based on a continous way grain dry moisture on-line measuring method for matter stream method, it is characterized in that, comprise the following steps:

Step one, starts drying machine and starts drying, through entering the grain time and entering grain Δ stabilization time ζ _1i, free time Δ ζ _ai, row's grain time and row's grain Δ stabilization time ζ _2iafter complete one arid cycle Δ ζ _i, what calculate i-th cycle enters grain quality W _1i:

W _1i＝WH _i-WL _i-1+((WH _i-WM _i)/Δξ _ai)·Δξ _1i

Wherein, WH _iit is the high charge level quality of drying machine after entering grain i-th time and entering grain stabilization time; WL _i-1be the i-th-1 time row's grain and the low material level quality of drying machine after row grain stabilization time; WM _iit is drying machine quality after i-th free time; Δ ζ _1ibe enter the grain time for i-th time and enter grain stabilization time; Δ ζ _aiit is i-th free time; I represents arid cycle;

Step 2, calculates row's grain quality W in i-th cycle _2i:

W _2i＝WH _i-WL _i-((WH _i-WM _i)/Δξ _ai)·(Δξ _2i+Δξ _ai)

Wherein, WL _ibe i-th row's grain and the low material level quality of drying machine after row grain stabilization time; Δ ζ _2iit is i-th row's grain time and row grain stabilization time;

Step 3, calculates drying machine i-th row's grain moisture M _2i:

$M_{2i}=1-\frac{W_{1i}(1-M_{1i})}{W_{2i}}$

Wherein, M _1iit is the grain moisture content entering drying machine i-th time.

2., as claimed in claim 1 based on the continous way grain dry moisture on-line measuring method of matter stream method, it is characterized in that, described drying machine through entering grain and stabilization time Δ ζ _1iafter stop into grain, through free time Δ ζ _aiafter start to arrange grain, through row's grain and row's grain Δ stabilization time ζ _2irear stopping row grain, enters grain and hockets with row's grain interval, and at Δ ζ arid cycle _iinside all carrying out continuous drying operation.

3., as claimed in claim 1 or 2 based on the continous way grain dry moisture on-line investigating method of matter stream method, it is characterized in that, described arid cycle Δ ζ _icomputing formula be:

Δζ _i＝Δζ _1i+Δζ _2i+Δζ _ai

Wherein, Δ ζ _ifor i-th arid cycle of drying machine.

4. as claimed in claim 1 based on the continous way grain dry moisture on-line measuring method of matter stream method, it is characterized in that, described drying machine adopts the operating type of two limit material level interval row grain, when grain in solid food storehouse reaches upper limit level sensor position, automatic startup row grain conveyer, starts to arrange grain; When grain in solid food storehouse is lower than lower limit level sensor position, automatically stop row's grain conveyer, stop row's grain.

5. based on a time-controllable method for the grain dry moisture of matter stream method, it is characterized in that, use the moisture on-line measuring method described in claim 1-4, comprise the following steps:

Step one, before calculating, in i arid cycle, m arid cycle arranges grain moisture rolling cumulative mean MB _2i;

${\mathrm{MB}}_{2i}=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(M_{2j}/m)$

Wherein, m is rolling accumulative frequency; M _2jfor drying machine jth time row's grain moisture;

Step 2, when | MB _2i-M _t| during > δ, calculate the maximal adjustment time Δ in next cycle and i+1 cycle _large:

${\mathrm{\&Delta;}}_{l\arg e}=(\frac{{\mathrm{WBYT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\&times;\frac{{\mathrm{\&Delta;\&zeta;B}}_i}{m}$

Wherein, WBT _ifor in front i cycle period, m actual dehydration arid cycle quality is rolled cumulative; Δ ζ B _idrying time for m arid cycle in the front i arid cycle rolls cumulative; WBYT _i+1desired dehydration quality for m arid cycle in front i+1 arid cycle is rolled cumulative; M _tfor target water score value; δ is moisture deviation;

Step 3: to maximal adjustment time Δ _largethe mode adopting small step to adjust slowly adjusts:

${\mathrm{\&Delta;}}_{small}=\frac{{\mathrm{\&Delta;}}_{l\arg e}}{l}=(\frac{{\mathrm{WYBT}}_{i+1}}{{\mathrm{WBT}}_i}-1)\&times;\frac{{\mathrm{\&Delta;\&zeta;B}}_i}{m}\&times;\frac{1}{l}$

Wherein, Δ _smallfor the minimum regulation time of single; L is the step number that small step is adjusted slowly;

Step 4, calculates Δ ζ cycle time in the i-th+1 time cycle _i+1:

Work as MB _2i-M _tduring > δ, then increase the free time of drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai+ Δ _small;

Work as MB _2i-M _tduring=δ, then the free time of drying machine is constant, Δ ζ _{a (i+1)}=Δ ζ _ai;

Work as MB _2i-M _tduring <-δ, then reduce the free time of drying machine, Δ ζ _{a (i+1)}=Δ ζ _ai-Δ _small;

Step 5: before calculating, in i+1 arid cycle, m arid cycle arranges grain moisture rolling cumulative mean MB _{2 (i+1)}as long as, | MB _{2 (i+1)}-M _t| > δ, repeat step one to step 4, until | MB _{2 (i+1)}-M _t| during≤δ, stop adjustment.

6., as claimed in claim 5 based on the time-controllable method of the grain dry moisture of matter stream method, it is characterized in that, Δ ζ B in described step 3 _icomputing formula is:

${\mathrm{\&Delta;\&zeta;B}}_i=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}({\mathrm{\&Delta;\&zeta;}}_{1j}+{\mathrm{\&Delta;\&zeta;}}_{2j}+{\mathrm{\&Delta;\&zeta;}}_{aj})$

Wherein, Δ ζ B _itime for m arid cycle in i arid cycle rolls cumulative.

7. as claimed in claim 5 based on the time-controllable method of the grain dry moisture of matter stream method, it is characterized in that, before in described step 3, in i cycle period, the dehydration quality rolling of m arid cycle adds up WBT _icomputing formula is:

${\mathrm{WBT}}_i=\underset{j=i-m+1}{\overset{i}{\&Sigma;}}(W_{1j}-W_{2j})$

In formula, W _1jfor j time enters grain quality; W _2jfor j time is discharged grain quality.

8. as claimed in claim 5 based on the time-controllable method of the grain dry moisture of matter stream method, it is characterized in that, the cumulative WYBT of quality rolling that should dewater in described step 3 _icomputational methods are as follows:

${\mathrm{WBYT}}_i={\mathrm{WB}}_{1i}\&times;(1-\frac{1}{1-M_T}\&times;(1-\underset{j=i-m+1}{\overset{i}{\&Sigma;}}\left(M_{1j}/m\right))$

Wherein, WB _1ifor the grain quality of entering of m arid cycle in the front i arid cycle is rolled cumulative.

9., based on a continous way grain dry automatic operating system for method described in claim 1-8, it is characterized in that, described system comprises:

Wet grain grain storehouse before tower, the plate installed bottom it enters drying machine main body for controlling cereal interval, and before described tower, wet grain grain storehouse is positioned at the side of drying machine main body;

The temporary warehouse of solid food after tower, it is for the grain after storing and drying, and after described tower, the temporary warehouse of solid food is positioned at the opposite side of drying machine main body;

LOAD CELLS, it is for taking the mass change of grain in drying machine main body, and described LOAD CELLS is arranged on the bottom of drying machine main body.

10. a kind of continous way grain dry automatic operating system according to claim 9, is characterized in that, described system adopts interval to enter the drying operation mode of grain and row's grain, and plate control cereal interval enters in drying machine main body carries out drying; By controlling draining crop mechanism running, controlling cereal interval discharge drying machine main body and terminating drying.