CN101569280B - Automatic control system of bubbling irrigation and sprinkling irrigation - Google Patents
Automatic control system of bubbling irrigation and sprinkling irrigation Download PDFInfo
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- CN101569280B CN101569280B CN2009100215661A CN200910021566A CN101569280B CN 101569280 B CN101569280 B CN 101569280B CN 2009100215661 A CN2009100215661 A CN 2009100215661A CN 200910021566 A CN200910021566 A CN 200910021566A CN 101569280 B CN101569280 B CN 101569280B
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Abstract
The invention discloses an automatic control system of bubbling irrigation and sprinkling irrigation, which comprises a signal processor, an output control circuit, and a monitoring host, wherein the signal processor is used for receiving electric signals sent by each sensor and filtering, amplifying and driving the signals; the output control circuit is used for executing actions of a contactor, a thermal relay and a time relay of each water pump and adjusting and controlling pipeline pressure of a bubbling irrigation pump and a sprinkling irrigation pump through a frequency converter; and the monitoring host is used for performing data acquisition, filtering, processing and analysis on multi-path sensor signals after the processing by the signal processor and finishing the settings of working parameters and working modes, and uses the output control circuit to perform frequency conversion control on the bubbling irrigation pump and the sprinkling irrigation pump. The control system has the advantages of stable and reliable performance, water conservation and energy conservation, and can be widely applied to large areas of farm irrigation projects in northern provinces lack of water resources in China.
Description
Technical field
The present invention relates to a kind of computer control system of in agricultural irrigation, using, particularly a kind of automatic control system that is used for non-irrigated plateau fruit-bearing forest district bubbling irrigation, the sprinkling irrigation of cereal district.
Background technology
Drought plateau farming region is distributed widely in each provinces and regions of northern China, for example counties and cities such as the Xifeng City of each county such as the Yongshou in each county such as the Pinglu of Jin Nan, Ruicheng, Yuanqu, Yangcheng, Zezhou County, Guanzhong the north, Xunyi, Changwu, Luochuan, plain boiled water, Pucheng, Chengcheng, Hancheng, Heyang, Long Dong, Pingliang, Qingyang.These regional landforms characteristics are, being slitted by ditch and be cut into many strip-types or leg-of-mutton little Plain in the Plain, is referred to as plateau usually, and the middle high slightly plateau that is the steamed bun shape is referred to as loess hills again, and the slit zone that links to each other of these plateau loess hills and ditch is referred to as plateau loess hills ditch and slits and distinguish.These areas are away from the ocean, weather arid, most of the time rainfall deficiency in a year, annual precipitation on average only is 300～500mm, be less than half of earth surface average precipitation, and rainfall concentrates on again in very short time in autumn, will be referred to as rainy season during this period of time.Because many hillside fields vegetation deterioration in these areas is serious, to the poor ability of water and soil conservation, therefore rainwater usually forms big flood again in rainy season, the face of land, hillside fields is formed seriously wash away.Because waterpower is moved effect, these regional ditches slit and extend to the source, and more and more length heals wide darker.A large amount of loess is washed away to be moved, and takes North China to as far as the Bohai Sea, the East Sea by current.1 years wash away and move formed the North China Plain of today and has been dispersed throughout the zanjon in aforementioned each county open-minded greatly, makes the underground water-bearing strata in these areas appear in a large number along the generation of slitting of these ditches, thereby makes the water loss in the stratum, groundwater table decreasing.Form the weary situation of the serious feedback of water resource.In these areas, 2/3rds field piece is used to plant grain, and nearly 1/3rd are used to raise fruit trees.In season (annual April～July) in that grain is grown fast, need a large amount of rainwater.And this moment in northern just dry season, rainwater does not seldom have sufficient water source to irrigate, and will produce to drop in production over a large area, and serious can have no harvest even.In fruit apple and peach season of growing up and saving sugar for example, need sufficient moisture, and this moment just as dry season, if not pouring in time can produce a large amount of sheddings, on the tree last fruit also the little look of body wither, taste is bad.In order to improve the output and the quality in farmland and fruit field, pouring in time, and these regional most of water resources shortages, adopt the mode of flood irrigation, the water yield that can be utilized by fruit tree only is to water 20%～30% of irrigation quantity, not only wastes the electric power that draws water, the more valuable water of waste.In order to raise the efficiency, using water wisely, through this group experimental study for many years, the farmland in non-irrigated plateau district is adopted sprinkling irrigation and fruit-bearing forest is adopted bubbling irrigation is the irrigation method of saving water and energy most.Sprinkling irrigation is pipeline to be embedded in underground, and uniform many shower nozzles in the piece of field are sprayed to cereals (wheat, millet, buckwheat, rape, beans etc.) farmland; Bubbling irrigation is pipeline to be embedded in underground, at every strain fruit tree root subsurface the head that gushes of water outlet is arranged, and when the hydraulic pressure in the pipeline reaches a certain threshold value, gushes head and opens, and water is gushed out from gushing head, directly is penetrated into depths around the tree root, and trees are watered.
What is the core technology of bubbling irrigation, sprinkling irrigation? be will make to gush head and the pressure at shower nozzle place keeps constant, it is identical with the aquifer yield of shower nozzle that each is gushed, precisely because like this, could realize to every one tree, to the even pouring of each field piece.And on implementation method, can not gush head or shower nozzle place at each to install pressure transducer and pressure control device additional and make pressure keep constant, cost is too high like this, can make water rate too high, and the masses can't accept, and lose more than gain.Therefore can only determine to gush under the situation of head and shower nozzle place pressure value, calculate by hydraulics, calculating the exit of pump pressure P should be for much, thereby the top hole pressure P of control water pump makes and gushes head or the shower nozzle place keeps constant compression force and stable aquifer yield on suitable numerical value.This just relates to the calculating of line pressure loss.
The calculating of line pressure loss relates to the analysis of pipeline water pressure.Water pressure can be divided into hydrostatic force and flowing pressure.Hydrostatic force is meant the pressure of water in the immobilising closed system of water., a water-filled pipe, the valve Close All, the pressure in the system is hydrostatic force.Hydrostatic force be a system the pressure of obtainable maximum.Flowing pressure, i.e. water pressure in the pipeline under the flow state.Friction loss and elevation change all can make intrasystem flowing pressure change, and have promptly produced the line pressure loss.The mechanical energy loss that water flows and produces in pipeline is called the loss of flood peak.The viscosity of liquid is the basic reason of liquid stream energy loss.For the ease of analysis and research with calculate, according to the shape and size on border whether the longshore current journey change and whether main flow breaks away from solid boundary or formation whirlpool, the loss of flood peak is divided into frictional head loss and local head loss's two big classes.
The calculating of frictional head loss is mainly determined loss amount by the analysis of state that the pipe internal water is flowed, and having comprised:
(1) loss of flood peak of the Laminar Flow in the pipe;
(2) loss of flood peak of the Turbulence Flow in the pipe.
The calculating of local head loss:
In runner, except the straight flow section, the local location that also often has the border sharply to change, these local locations though the limit wall is different, of a great variety, cause the reason of local losses, and certain common point is but arranged.With the pipeline is example, and the part of pipeline hinders can reduce following a few class: the 1. expansion of mobile section, dwindle or be out of shape; 2. the change of flow direction; Barrier (as lock, valve, grid, net etc.) is 3. arranged in the runner; 4. runner divides prong that the remittance of flow is arranged or tells.
Owing to still be difficult at present come the rule of definite local head loss quantitatively, therefore mainly come to determine the size of local losses under the various runner change condition by experiment by Analysis on Mechanism.Local head loss's universal calculation equation (1), promptly
In the formula:
ζ---local head loss's coefficient (coefficient of shock resistance is determined by experiment);
V---the mean velocity in section of ζ correspondence.
The loss of flood peak in most of local locations can't be derived with theoretical method at present, can only go out the corresponding coefficient ζ of local head loss by means of experiment measuring, and ζ should be relevant with the reynolds number Re and the geometrical boundary situation at part obstruction place in theory.But flowing is subjected to understanding intake resistance square district earlier after the local interference.Therefore, when actual computation, can think in Re＞1 * 10
4Condition under ζ and reynolds number Re irrelevant, be the constant that local location geometric configuration is determined.In the design manual of specialty, at length be loaded with the experiment value of the local location coefficient of shock resistance ζ of different shape.
In the waterpower of reality is calculated, for bigger irrigation system, as really calculate the local head loss at each pipe fitting, valve place according to formula, workload will be very numerous and jumbled, therefore should do to simplify and handle.Because the pipeline that irrigation system adopted mostly is the waterpower long tube, thereby the shared proportion of local head loss is less in the pipeline loss of flood peak, so emphasis is the frictional head loss that calculates pipeline, local head loss can be expressed as
h
j＝kh
f (2)
In the formula:
The ratio of k---local head loss and frictional head loss, for the waterpower long tube, k generally gets 5%～10%.
The calculating of arm loss
Irrigation pipe network comprises main, divides main and arm etc., wherein the loss of flood peak of main and branch main can be calculated accurately by aforementioned theory, but because arm belongs to the discharge of multiple outlets passage, a shower nozzle shunting is arranged at a certain distance, the flow in the arm reduces along journey.When calculating the linear loss of pipeline, can calculate the pipeline linear loss between two shower nozzles piecemeal, be the frictional head loss of this arm after the addition.But calculate quite loaded down with trivial details like this.Can adopt short-cut method to calculate.
The frictional head loss H of discharge of multiple outlets pipeline
fWith same pipeline but the frictional head loss h when all flow only goes out to flow at the pipe end
fRatio be called factor of multiple outlets, represent with F, promptly
For this reason, by non-discharge of multiple outlets frictional head loss h
f, multiply by factor of multiple outlets F, just can try to achieve the frictional head loss H of discharge of multiple outlets pipeline (as sprinkler lateral)
f, promptly
H
f＝Fh
f (4)
Factor of multiple outlets can directly be consulted pipeline factor of multiple outlets table and obtain.
Also can often adopt the basic experience formula and calculate frictional head loss in the sprinkling irrigation
In the formula:
Q---flow (m in the pipeline
3/ h);
L---calculate pipe range (m);
F---friction loss factor;
M---the index of discharge;
B---caliber index.
Friction loss factor f, index of discharge m, caliber index b can be tabled look-up by selected tubing and be obtained in this formula.
After obtaining the frictional head loss of discharge of multiple outlets pipeline, can adopt following several computing method to determine the arm inlet pressure.
1. pressing the shower nozzle that working pressure is minimum on the arm calculates
The computing formula of this method is
H
=h '
f+ Δ Z+0.9h
p(6)
In the formula:
H
---the pressure head (m) of a tube inlet;
Δ Z---tube inlet ground is to the difference in height of the minimum shower nozzle water inlet of working pressure, during adverse grade be on the occasion of, be negative value (m) when sloping;
H '
f---the corresponding pipeline section frictional head loss of arm;
h
p---the sprinkler design working pressure;
2. by reducing 0.25h
fCalculate
The computing formula of this method is
H
=h '
f+ Δ Z+h
p-0.25h
f(7)
In the formula:
h
f---the frictional head loss (m) of pipeline section between arm first and last two shower nozzles;
Other symbolic significances are the same.
The method is applicable to the situation of the smooth and arm upper nozzle number (N＞5) of arm physical features along the line.
3. by pressure be for the computing formula that the design effort spot pressure calculates this method from the point of arm length overall 1/4 position
H
=h "
f+ Δ Z+h
p(8)
In the formula:
H "
f---a tube inlet ground is about the frictional head loss (m) of arm length overall 1/4 place's shower nozzle water inlet to the porch;
The difference of elevation of Δ Z---above-mentioned two positions (m).
Other symbolic significances are the same.
The method is suitable for the situation on the smooth or one side gentle slope of landform, also often adopts in the hollow billet waterpower of slight irrigation is calculated.
Current have some places flip-flop if any some segment length's direct current sections and border in whole process, and each local losses is when being independent of each other, the flow through loss of flood peak h of whole flow process of current
wBe each section linear loss h
fWith each local losses h
jAlgebraic sum, promptly
h
w＝∑h
f+∑h
j (9)
The pass of the pressure loss and the loss of flood peak is
p
w＝ρgh
w；p
f＝ρgh
f；p
j＝ρgh
j (10)
Be directed to the pipe system of bubbling irrigation and sprinkling irrigation,, can determine the loss of flood peak and the pressure loss of their pipe system according to above method.If pressure loss in piping is respectively and is P
YsAnd P
Ps, establishing the optimum working pressure that gushes the head place is P
Yt, the optimum working pressure at shower nozzle place is p
Pt, then for the spring pump, its exit of pump pressure
P
yk＝P
yt+P
ys (11)
For sprinkling irrigation, its exit of pump pressure
P
pk＝P
pt+P
ps (12)
From top argumentation as can be known, no matter be that spring irrigated area or sprinkling irrigation are distinguished for different field pieces, because its distance with pump discharge is different, or different with the height of pump discharge, thereby pressure loss in piping P
sAlso unequal, in this case in order to guarantee even irrigation, need to carry out the rotation flow working system, the irrigated area is divided into several field pieces, make each field piece internal duct pressure loss difference less during division as far as possible, calculate pressure loss in piping respectively at each field piece then, determined the pump discharge pressure value according to formula (11), (12), realize the constant voltage control of relevant pressure value then for each field piece respectively, so just can guarantee even irrigation.And, realize that what of customer volume constant voltage control also will consider for each field piece.
With the bubbling irrigation is example, because a plurality of farmers' use same pipeline to water, in the same time, some farmers' opens a sluice gate to water, and some does not open a sluice gate to water, so the number of gate opening does not wait, in the same time just, the number of opening that gushes head does not wait, and aquifer yield does not wait, if adopt the water pump of constant rotational speed, when gushing a number of opening more after a little while, line pressure is higher, and aquifer yield is big in the unit interval, is unfavorable for the infiltration of water, also may make water overflow the face of land, produce cross flow and waste,, also can can't release and make the pipeline spalling owing to line pressure if the gate of opening very little.If the gate of opening is too many, can make the line pressure deficiency again, gush an aquifer yield minimizing thereby make.Based on this reason, bubbling irrigation must adopt variable-frequency control technique, by signal piping pressure, according to line pressure, the use converter technique is regulated the rotating speed of water pump, makes pipeline terminal keep a constant compression force near gushing the head place, and is constant thereby the aquifer yield of head is gushed in assurance.For sprinkling irrigation, if adopt the water pump of constant rotational speed, the number of the shower nozzle of opening during owing to irrigation does not wait, and aquifer yield does not wait, and can make line pressure produce same problem yet, can adopt in the same way and handle.
Summary of the invention
The objective of the invention is to; provide a kind of and can the field piece that varying number gushes head (or shower nozzle), a different distance, differing heights be carried out reliably, safety, water yield irrigation control system accurately, guarantee to water quality, conserve water resource; protection pipeline safety realizes best pouring.
For reaching above purpose, the present invention takes following technical scheme to be achieved:
A kind of bubbling irrigation, sprinkling irrigation automatic control system is characterized in that, comprising:
A signal processor is used to receive the electric signal that the level sensor of spring pump, sprinkling irrigation pump outlet pressure sensor and current sensor, garden pump current sensor and deep water pump, cistern is sent here, and signal is carried out filtering, amplification and driving handle;
An output control circuit is used to carry out contactor, electrothermal relay, the time relay action of each water pump and by frequency converter spring pump and sprinkling irrigation pump line pressure is regulated control;
A monitoring host computer, this monitoring host computer is connected with the output of signal processor, and is connected with the PC two-way signaling, is connected with the input of output control circuit; This monitoring host computer is used for the multiple sensor signal after the signal processor processes is carried out data acquisition, digital filtering, data processing and analysis, and the parameter setting of finishing the work, Working mode set; Calculate by hydraulics, spring pump and sprinkling irrigation pump are implemented variable frequency control, simultaneously deep-well pump, garden pump are implemented control by output control circuit; and write down the work history of all water pumps; according to detected working current, judge whether pump working is normal, and water pump is implemented protection.
In the such scheme, described signal processor circuit comprises the sample of signal electric bridge, multiway analog switch, signal filtering and amplifying circuit, the current signal of each sensor output separately therein in sample of signal electric bridge the sample resistance R1 through a brachium pontis obtain mV magnitude voltage signals T11～T81, another brachium pontis of sample of signal electric bridge is exported corresponding reference voltage signal T12～T82, through two 8 path analoging switch signal is carried out gating again, under the effect of the gating signal that the processor of monitoring host computer is sent here, a pair of signal among each each the gating mV magnitude voltage signals T11～T81 of these two analog switches and the reference voltage signal T12～T82, to two analog switches public output V-1 and V+1 separately, the signal of this two-way public output V-1 and V+1 is directly delivered to the differential input end of the operational amplifier in signal filtering and the amplifying circuit, be fed to the core circuit module of monitoring host computer through the signal V1 after amplifying, finish analog to digital conversion by the A/D converter in the nucleus module, obtain sampled data.
Described output control circuit, comprise the pump motor control that multichannel is identical, for each pump motor control, input to the base stage of triode T1 through resistance R 100 from wherein one tunnel control signal of on-site supervision main frame, the grounded emitter of triode T1, an end of its collector connecting relay J1 coil; Another termination direct current+12V of relay J 1 coil; Sustained diode 100 is in parallel in order to protection triode T1 with relay J 1 coil, alternating current 220V input being switched on or switched off through relay J 1 moving together contact, supply with or cancel the operating voltage on the water pump contactor J2 coil, again by being connected the three-phase working power that is switched on or switched off pump motor of the water pump contactor J2 main contact in the main control loop; Be equipped with frequency converter between the air switch of each pump motor control major loop and the water pump contactor J2, electric signal from the exit of pump pressure transducer is converted to the required control signal of frequency converter by the pressure signal transmitter, exports to the signal input end of frequency converter by the inverter control signal line.
Described monitoring host computer links to each other by the RS485 bus with PC and communicates; Install RS232-RS485 transition of communications circuit additional at the COM1 of PC port, carry out level conversion.
Control system of the present invention is stable and reliable for performance, meets national agricultural development plan, produces significantly for conserve water resource, developing agricultural, also has important academic significance, economic implications and engineering using value widely.
Description of drawings
Fig. 1 is a practical application synoptic diagram of control system of the present invention.
Fig. 2 is a control system theory diagram of the present invention.
Fig. 3 is a signal processor structure block diagram among Fig. 2.
Fig. 4 is the schematic diagram of the sample of signal electric bridge among Fig. 3.
Fig. 5 is the signal gating schematic diagram of multiway analog switch among Fig. 3.
Fig. 6 is signal amplification principle figure among Fig. 3.
Fig. 7 is the nucleus module theory diagram of monitoring host computer among Fig. 2.
Fig. 8 is output control circuit among Fig. 2 (power distribution cabinet) schematic diagram.
Fig. 9 is the PC working interface figure of control system of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and principle of work.
The present invention is mainly used in the bubbling irrigation of non-irrigated plateau district fruit-bearing forest, the control of sprinkling irrigation, also can be used for the control of bubbling irrigation or sprinkling irrigation separately.
Theory diagram of the present invention and annexation are seen Fig. 2, and bubbling irrigation, sprinkling irrigation automatic control system comprise: signal processor 1, this signal processor link to each other with all the sensors (1)～(8), monitoring host computer 2 and power supply 4 respectively; Monitoring host computer links to each other with signal processor, desktop PC 3,220V AC power 4, output control circuit (power distribution cabinet) 5 respectively; The 220V AC power also links to each other with PC, power distribution cabinet respectively.
The system schematic that the present invention uses is seen Fig. 1.This also is first real application systems of the present invention.The system that shows among the figure is made up of 2 spring pumps, a sprinkling irrigation pump, a garden pump, a cistern, a deep-well pump, a computer control system, the control system that this system forms by the working routine of JK3000 type monitoring host computer of the present invention and PC and host computer, slave computer is controlled and data-base recording safely and reliably to bubbling irrigation, sprinkling irrigation, garden irrigation, deep-well pump, cistern.
As shown in Figure 2, system works principle of the present invention is as follows:
The contactor of all power-equipments such as the total plug-in strip of three-phase supply, each water pump and electrothermal relay (protector), bubbling irrigation frequency converter, sprinkling irrigation frequency converter are installed in the power distribution cabinet.The break-make of the contactor of all power-equipments all is subjected to the control of monitoring host computer.
Monitoring host computer 2 links to each other by the RS485 bus with PC 3 and communicates, and installs RS232-RS485 transition of communications circuit additional at the COM1 of PC port, carries out level conversion.
Below be the realization circuit of the present invention that the inventor provides, it specifies as follows:
The schematic block circuit diagram of native system signal processor 1 is seen Fig. 3.The all the sensors that native system uses all adopts direct current 24V power supply, the output of 4～20mA normalized current signal.As shown in Figure 4, the current signal of each sensor output obtains mV magnitude voltage signals T11～T81 (totally 8 tunnel) through the sample resistance R1 of a brachium pontis in sample of signal electric bridge separately therein, another brachium pontis of sample of signal electric bridge is exported corresponding reference voltage signal T12～T82 (totally 8 tunnel), through two 8 path analoging switch signal is carried out gating again, under the effect of the gating signal that the processor of monitoring host computer is sent here, (actual be one road signal to a pair of signal among each each the gating T11～T81 of these two analog switches and the T12～T82, one is signal, another is the reference voltage of signal), public output V-1 and V+1 to two analog switches, this two road port V-1, the signal of V+1 is directly delivered to the differential input end of the operational amplifier in signal filtering and the amplifying circuit, be fed to the core circuit module of monitoring host computer through the signal V1 after the operational amplifier U13 amplification, finish analog to digital conversion by the A/D converter in the nucleus module, obtain sampled data.
Monitoring host computer 2 inside are made up of circuit such as switch power module, nucleus module, signal processing module, control output driver modules.220V AC power 4 inputs to switch power module, Switching Power Supply output+12V ,-12V and+three kinds of voltages of 5V supply with each circuit board.
A plurality of signals after 2 pairs of signal processors of monitoring host computer 1 are handled carry out data acquisition, digital filtering, data processing and analysis; Finish the work parameter setting, Working mode set; The record of each start-up time of each water pump and stand-by time, the detection of each pump working electric current, and on the PC that is attached thereto, set up working interface and database, when PC is started shooting, all send the historical record of each water pump of being stored to PC, deposit in the database of PC.Monitoring host computer is by the detection to spring pump and sprinkling irrigation pump top hole pressure, according to the distance and the physical features height in given plot, calculate by pipeline hydraulics, suitable pressure is determined in calculating, pass through variable frequency control, pump rotary speed is maintained on the suitable numerical value, thereby keep a suitable pumping hole pressure, thereby make the plot of being watered obtain required constant pressure, make the aquifer yield that gushes head keep constant, the pressure of whole pipeline is controlled in the suitable security value (s), realizes best pouring.
Monitoring host computer 2 carries out data transmission by the RS485 interface with PC computing machine 3 and communicates by letter with command transfer.The nucleus module block diagram of monitoring host computer 2 inside is seen Fig. 7.Nucleus module has three kinds of basic configuration, a kind ofly is made up of the RAM920T+RAM+ROM+ various interface, is made up of single-chip microcomputer+RAM+ROM+A/D converter+various interface for second kind, and the third is made up of the DSP+RAM+ROM+ various interface.What be applied in on-the-spot model machine employing is second kind of nucleus module.Its processor is W78E58B.The control signal of monitoring host computer output can be controlled all devices in the native system.
Fig. 8 is an output control circuit, only draws 1 the tunnel here, and other is identical therewith.A certain road control signal from the on-site supervision main frame is passed through the base stage that resistance R 100 inputs to NPN type triode T1, the grounded emitter of T1, an end of its collector connecting relay J1 coil.Another termination direct current+12V of J1 coil.Afterflow protection diode D100 and J1 coil are in parallel in order to protection triode T1, and the anode of D100 connects the collector of T1, and its negative electrode connects+12V.Being switched on or switched off of the moving together contact of alternating current 220V input process J1 to supply with or to cancel the operating voltage on the A.C. contactor J2 coil, reaches the purpose that is switched on or switched off water pump three-phase working power by being switched on or switched off of J2 main contact again.Also will be through the three-phase electricity of contactor through the overtemperature relay pump motor that just can anhydrate, the protection of overload situations being cut off the electricity supply by electrothermal relay.Between air switch and contactor J2, frequency converter is housed, the three-phase electricity input end of frequency converter links to each other respectively with three lower ends of air switch, the three-phase electricity output terminal of frequency converter links to each other with three main contacts of contactor J2 respectively, give 3,4 pin of pressure signal transmitter from the electric signal of exit of pump pressure transducer, its 3 pin is a signal wire, and 4 pin are ground wire, and 1 and 2 pin connect the alternating current 220V power supply.After being converted to the required control signal of frequency converter by the pressure signal transmitter, 6 pin output from the pressure signal transmitter, give the signal input end mouth 7 of frequency converter by the inverter control signal line, the ground wire of inverter control signal is given 8 pin of frequency converter by 5 pin of pressure signal transmitter by the control signal ground wire.
Fig. 9 is the working interface of PC computing machine 3.The color graphics that PC is finished all devices duty intuitively shows, such as the duty of equipment such as water level of deep well, cistern water level, 2 spring pumps, sprinkling irrigation pump, deep-well pump, garden pump and all running parameter and the size of working current separately of power-equipments, the operator on duty can be come into plain view.Can also control corresponding pump motor and start or stop by the facility switching on the click interface simultaneously.The database of setting up in PC can write down the water pump beginning and ending time of each working hour, can also write down underground water table.Can also inquire about the work historical data of each equipment by days.
Claims (4)
1. a bubbling irrigation, sprinkling irrigation automatic control system is characterized in that, comprising:
A signal processor (1), be used to receive the electric signal that the level sensor of spring pump, sprinkling irrigation pump outlet pressure sensor and current sensor, deep-well pump and garden pump current sensor, deep-well pump, cistern is sent here, and signal carried out filtering, amplification and driving handle;
An output control circuit (5) is used to carry out contactor, electrothermal relay, the time relay action of each water pump and by frequency converter spring pump and sprinkling irrigation pump line pressure is regulated control;
A monitoring host computer (2), this monitoring host computer is connected with the output of signal processor, and is connected with the PC two-way signaling, is connected with the input of output control circuit; This monitoring host computer is used for the multiple sensor signal after the signal processor processes is carried out data acquisition, digital filtering, data processing and analysis, and the parameter setting of finishing the work, Working mode set; Calculate by hydraulics, spring pump and sprinkling irrigation pump are implemented variable frequency control, simultaneously deep-well pump, garden pump are implemented control by output control circuit; and write down the work history of all water pumps; according to detected working current, judge whether pump working is normal, and water pump is implemented protection.
2. bubbling irrigation as claimed in claim 1, the sprinkling irrigation automatic control system, it is characterized in that, described signal processor circuit comprises the sample of signal electric bridge, multiway analog switch, signal filtering and amplifying circuit, the current signal of each sensor output separately therein in sample of signal electric bridge the sample resistance R1 through a brachium pontis obtain mV magnitude voltage signals T11～T81, another brachium pontis of sample of signal electric bridge is exported corresponding reference voltage signal T12～T82, through two 8 path analoging switch signal is carried out gating again, under the effect of the gating signal that the processor of monitoring host computer is sent here, a pair of signal among each each the gating mV magnitude voltage signals T11～T81 of these two analog switches and the reference voltage signal T12～T82, to two analog switches public output V-1 and V+1 separately, wherein, T11, T12 is a pair of, T21, T22 is a pair of, T31, T32 is a pair of, T41, T42 is a pair of, T51, T52 is a pair of, T61, T62 is a pair of, T71, T72 is a pair of, T81, T82 is a pair of, the signal of this two-way public output V-1 and V+1 is directly delivered to the differential input end of the operational amplifier in signal filtering and the amplifying circuit, be fed to the core circuit module of monitoring host computer through the signal V1 after amplifying, finish analog to digital conversion by the A/D converter in the nucleus module, obtain sampled data.
3. bubbling irrigation as claimed in claim 1, sprinkling irrigation automatic control system, it is characterized in that, described output control circuit, comprise the pump motor control that multichannel is identical, for each pump motor control, wherein one tunnel control signal from the on-site supervision main frame is passed through the base stage that resistance R 100 inputs to triode T1, the grounded emitter of triode T1, an end of its collector connecting relay J1 coil; Another termination direct current+12V of relay J 1 coil; Sustained diode 100 is in parallel in order to protection triode T1 with relay J 1 coil, alternating current 220V input being switched on or switched off through relay J 1 moving together contact, supply with or cancel the operating voltage on the water pump contactor J2 coil, again by being connected the three-phase working power that is switched on or switched off pump motor of the water pump contactor J2 main contact in the main control loop; Be equipped with frequency converter between the air switch of each pump motor control major loop and the water pump contactor J2, electric signal from the exit of pump pressure transducer is converted to the required control signal of frequency converter by the pressure signal transmitter, exports to the signal input end of frequency converter by the inverter control signal line.
4. bubbling irrigation as claimed in claim 1, sprinkling irrigation automatic control system is characterized in that described monitoring host computer (2) links to each other by the RS485 bus with PC (3) and communicates; COM1 port at PC (3) installs RS232-RS485 transition of communications circuit additional, carries out level conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100215661A CN101569280B (en) | 2009-03-17 | 2009-03-17 | Automatic control system of bubbling irrigation and sprinkling irrigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100215661A CN101569280B (en) | 2009-03-17 | 2009-03-17 | Automatic control system of bubbling irrigation and sprinkling irrigation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101569280A CN101569280A (en) | 2009-11-04 |
| CN101569280B true CN101569280B (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100215661A Expired - Fee Related CN101569280B (en) | 2009-03-17 | 2009-03-17 | Automatic control system of bubbling irrigation and sprinkling irrigation |
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| CN (1) | CN101569280B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869044A (en) * | 2010-06-01 | 2010-10-27 | 中国农业科学院农田灌溉研究所 | Automatic water feeder for moistening and irrigating rice |
| DE102013109784A1 (en) * | 2013-09-06 | 2015-03-12 | Koubachi AG | Irrigation control system |
| CN110323804A (en) * | 2019-07-15 | 2019-10-11 | 智恒科技股份有限公司 | A kind of acquisition of low power consumption data uploads circuit and method |
| CN110521553A (en) * | 2019-09-29 | 2019-12-03 | 重庆纳德雨涧环保科技有限公司 | Intelligent pressure regulating system and method for Intelligent spray irrigation |
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2009
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| Publication number | Publication date |
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| CN101569280A (en) | 2009-11-04 |
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