CN115500133A - Fertilizer applicator, quick fertilizer mixing device thereof, EC-PH balance adjusting method and storage medium - Google Patents
Fertilizer applicator, quick fertilizer mixing device thereof, EC-PH balance adjusting method and storage medium Download PDFInfo
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- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
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Abstract
A fertilizer applicator and a quick fertilizer mixing device thereof, an EC-PH balance adjusting method and a storage medium, wherein the fertilizer applicator comprises the quick fertilizer mixing device, and the device comprises: the input end of the main pipeline is connected with the raw water storage tank, and the output end of the main pipeline is connected with the fertilization pipeline; one end of the fertilizer suction pipeline is connected with the mother liquor storage tank, the other end of the fertilizer suction pipeline is connected with the water collecting pipe, and the fertilizer suction pipeline is provided with an electromagnetic valve which is connected with the control system; the water collecting pipe is communicated with the main pipeline; detecting a pipeline; the EC-PH detector is respectively connected with the detection pipeline and the control system; the control system calculates the amount of mother liquor required to be input for EC-PH balance adjustment according to the EC-PH set value and the detection value, and controls the corresponding input amount of the mother liquor by controlling the opening and closing of the electromagnetic valve so as to complete the on-line real-time EC-PH balance adjustment and stable output of the water fertilizer. The invention also provides an EC-PH balance adjusting method and a storage medium of the quick fertilizer mixing device.
Description
Technical Field
The invention relates to an agricultural fertilization technology, in particular to a fertilizer applicator, a quick fertilizer mixing device thereof, an EC-PH balance adjusting method and a storage medium.
Background
The existing fertilizer applicator technology mostly adopts a PID algorithm of a PLC to complete the mixing of fertilizer solutions, but a mathematical model of a front calculation method is lacked, a certain time is needed from starting to stabilizing of a feedback algorithm, and in the field of deep water-saving irrigation, irrigation is probably ten seconds to dozens of seconds, so most of fertilizer applicators are not ideal in water-saving irrigation, manual irrigation is more, and a full-automatic irrigation process can be rarely completed. The existing water and fertilizer integration industry has the problems of low precision, poor stability, low intelligent degree, lack of strategy optimization means and the like.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a fertilizer applicator, a quick fertilizer mixing device, an EC-PH balance adjusting method and a storage medium thereof.
In order to achieve the above object, the present invention provides an EC-PH balance adjusting method of a fertilizer applicator, comprising the steps of:
s100, detecting the EC-PH value of the fertilizer water at the outlet end of the fertilizer applicator, and obtaining an EC-PH detection value;
s200, comparing the EC-PH detection value with an EC-PH set value, and calculating the amount of mother liquor to be injected when the balance is adjusted to an EC-PH target value according to an adjustment measuring formula to obtain the corresponding amount of acid liquor or alkali liquor;
s300, injecting mother liquor according to the amount of the acid liquor or the amount of the alkali liquor, and fully mixing the mother liquor with raw water to obtain balanced and adjusted fertilizer water for continuous output; and
and S400, repeating the steps S100-S300 until the EC-PH detection value of the output fertilizer water is stabilized at the EC-PH target value.
The EC-PH balance adjustment method for the fertilizer applicator further comprises, before step S100, the following steps:
s001, emptying liquid in a fertilizer mixing barrel of the fertilizer applicator, and injecting raw water;
s002, measuring the volume of raw water entering the fertilizer mixing barrel to finish the injection target;
s003, searching a history record, and measuring and calculating the amount of the mother liquor needing to be injected by adopting the following formula:
EC accumulation calculation formula: a1 { [ j ° E1v1+ a2 { [ j ° E2v2= { [ j ° E3 (v 1+ v 2);
the pH accumulation calculation formula is as follows: b1 { [ pH1v1+ b2 { [ pH2v2= { [ pH3 (v 1+ v 2);
wherein E1 is ec of raw water, E2 is ec of mother liquor, E3 is ec of output fertilizer water, V1 is volume of used raw water, V2 is volume of used mother liquor, V1+ V2 is output fertilizer water volume, a1 is influence coefficient of ec corresponding to raw water on target output value, and a2 is influence coefficient of ec corresponding to mother liquor on target output value; b1 is the influence coefficient of the pH corresponding to the raw water on the target output value, b2 is the influence coefficient of the pH corresponding to the mother liquor on the target output value, pH1 is the pH of the raw water, pH2 is the pH of the mother liquor, and pH3 is the pH of the output fertilizer water;
and S004, injecting the mother liquor into the raw water according to the measured mother liquor amount, and calculating the ec-pH value of the mixed fertilizer water.
In the EC-PH balance adjustment method for the fertilizer applicator, in step S003, if there is no history, the mother liquor is injected in small batches, and the EC-PH is calculated by applying the following adjustment and calculation formula:
when the pH in the EC-PH detection value is greater than pHmax,
calculating the acid liquid amount V1 'and the corresponding EC1' required to increase to the target pH value, and the acid liquid amount V2 'and the corresponding EC2' required to increase to the pHmax value:
v1'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC1'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v1')；
v2'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmax*b2)；
EC2'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v2')；
when EC1 'is in a set range, measuring v1' of the acid liquor; when EC1'< EC2', a pH adjustment target value pHm is set, and an acid addition amount Vm is calculated: vm = ([ integral ] pH3 (v 1+ v 2) -b1 { [ integral ] pH1v 1)/(pHm × b 2);
when the pH value is less than pHmin, calculating the lye amount V3 'and the corresponding EC3' required for increasing to the pH target value, and calculating the lye amount V4 'and the corresponding EC4' required for increasing to the pHmin value;
v3'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC3'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v3')；
v4'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmin*b2)；
EC4'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v4')；
when EC3 'is within a set value, measuring v3' by the alkali liquor; when EC3'< EC4', a pH adjustment target value pHm is set, and the amount of added alkali Vj is calculated: vj = ([ pH3 (v 1+ v 2) -b 1: [ pH1v 1)/(pHm × b 2) ].
In order to better achieve the above object, the present invention further provides a quick fertilizer mixing device of a fertilizer applicator, which is installed on a frame of the fertilizer applicator and connected to a control system of the fertilizer applicator, wherein stable output of water and fertilizer is maintained through pre-prepared pre-detection, the quick fertilizer mixing device comprising:
the input end of the main pipeline is connected with a raw water storage tank of the fertilizer applicator, and the output end of the main pipeline is connected with a fertilizer application pipeline of the fertilizer applicator;
one end of the fertilizer suction pipeline is connected with a mother liquor storage tank of the fertilizer applicator, the other end of the fertilizer suction pipeline is connected with a water collecting pipe, and one end of the fertilizer suction pipeline, which is close to the water collecting pipe, is provided with an electromagnetic valve which is connected with the control system; two ends of the water collecting pipe are respectively communicated with the main pipeline through a first pipeline and a second pipeline, the first pipeline is close to the output end of the main pipeline, and the second pipeline is provided with a water pump and is close to the input end of the main pipeline;
a detection pipeline communicated with the second pipeline;
the EC-PH detector is respectively connected with the detection pipeline and the control system;
the control system calculates the amount of mother liquor required to be input for EC-PH balance adjustment according to an EC-PH set value and a detection value of the EC-PH detector, controls the corresponding input amount of the mother liquor by controlling the opening and closing of the electromagnetic valve, conveys the input mother liquor to the main pipeline from the second pipeline through the water pump after carrying out primary water-fertilizer mixing with raw water input from the first pipeline in the water collecting pipe, and outputs the mother liquor from the output end after finishing secondary water-fertilizer mixing with the raw water input from the input end so as to finish online real-time EC-PH balance adjustment and stable output of the water-fertilizer.
The quick fertilizer mixing device of the fertilizer applicator is characterized in that a spiral mixer is arranged in the main pipeline.
In the quick fertilizer mixing device of the fertilizer applicator, the first pipeline is communicated with the water collecting pipe through a venturi tube, and the fertilizer absorbing pipeline is connected with the venturi tube through the electromagnetic valve.
In the fertilizer quick mixing device of the fertilizer applicator, the oil pressure meters are respectively arranged at the ends of the first pipeline and the second pipeline connected with the main pipeline.
The fertilizer quick mixing device of the fertilizer applicator is characterized in that the first pipeline is communicated with the water pump through a third pipeline, and a back pressure valve is arranged on the third pipeline to prevent the water pump from being burnt without water.
The quick fertilizer mixing device of the fertilizer applicator is characterized in that the fertilizer suction pipeline is also provided with an electronic flowmeter, an observation flowmeter and a fine adjustment valve.
The quick fertilizer mixing device of the fertilizer applicator is characterized in that the detection pipeline comprises a detection channel, the detection channel is communicated with a detection port arranged on the first pipeline, an EC-PH detection interface is arranged on the detection channel, and the EC-PH detector is communicated with the detection channel through the EC-PH detection interface.
In order to better achieve the aim, the invention also provides a fertilizer applicator comprising the quick fertilizer mixing device.
In order to better achieve the above object, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the EC-PH balance adjustment method of the above fertilizer applicator.
The invention has the technical effects that:
the invention adopts a front calculation method, eliminates the starting stabilization time of the fertilizer applicator through structure and flow setting, realizes stable EC-PH output of the fertilizer applicator, and can meet the requirements of water-saving irrigation. Meanwhile, by combining the phytology optimization irrigation strategy, various automatic irrigation conforming to the phytology can be realized, and the full-automatic irrigation is really realized.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic structural view of a fast fertilizer mixing device according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic diagram of a main pipeline according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a detection pipeline according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a third pipeline according to an embodiment of the present invention;
fig. 6 is a working principle diagram of the fertilizer applicator according to an embodiment of the invention.
Wherein the reference numerals
1 machine frame
2 control system
21 touch screen
22 scram key
23 alarm
3 main pipeline
31 input terminal
32 fertilizer mixing pipe
33 output terminal
34 one-way water intake check valve
35 one-way fertilizer outlet check valve
4 water collecting pipe
41 first pipeline
42 second pipeline
43 third pipeline
44 back pressure valve
45 detection port
5 inhale fertile pipeline
51 solenoid valve
52 electronic flowmeter
53 observing flowmeter
54 trim valve
55 mother liquor channel
6 Venturi tube
7 detection pipeline
71 detection channel
72EC-PH detection interface
8 water pump
9 oil pressure gauge
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
the invention is suitable for adjusting the concentration and the pH value of the fertilizer in real time by an agricultural automatic fertilizer applicator, provides technical support for precise agricultural production, provides efficient and precise water and fertilizer supply for field crops, reduces the use amount of the fertilizer and improves the intelligent level of water and fertilizer integration. An EC-PH balance relation calculation model is constructed through a water and fertilizer integrated precise fertilization algorithm and a rapid fertilizer mixing device, the EC and pH precise control is realized, the water and fertilizer is controlled automatically at regular time and quantity, the intelligent allocation of irrigation according to the plant photosynthetic efficiency is realized according to the soil information and the environmental information of the plants, the remote monitoring and the guidance of fertilization and irrigation operations are carried out by combining a networking technology, a network and a mobile phone are utilized, the intelligent and modern agricultural management is realized, the deep water and fertilizer saving is finally realized, and the consumption and the pollution of agricultural production to water are reduced and avoided.
Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a quick fertilizer mixing device according to an embodiment of the present invention, fig. 2 is a top view of fig. 1, and fig. 3 is a schematic structural view of a main pipeline 3 according to an embodiment of the present invention. The fertilizer applicator of the invention comprises the rapid fertilizer mixing device, and the composition, structure, mutual position relation, connection relation and the like of other parts of the fertilizer applicator are mature prior art, so the details are not described herein, and only the rapid fertilizer mixing device is described in detail below.
The invention relates to a quick fertilizer mixing device, which is arranged on a frame 1 of a fertilizer applicator and connected with a control system 2 of the fertilizer applicator, the stable output of water and fertilizer is kept through pre-prepared pre-detection, the control system 2 can be arranged on the frame 1 and can be provided with a touch screen 21, an emergency stop key 22, an alarm 23 and the like, the control system 2 can also be a wireless remote control device, and the device is not limited to the above, and the quick fertilizer mixing device comprises: the middle of the main pipeline 3 is provided with a fertilizer mixing pipe 32, the input end 31 is connected with a raw water storage tank of the fertilizer applicator, and the output end 33 is connected with a fertilizer application pipeline of the fertilizer applicator; one end of the fertilizer absorbing pipeline 5 is connected with a mother liquor storage tank of the fertilizer applicator, the other end of the fertilizer absorbing pipeline 5 is connected with the water collecting pipe 4, one end of the fertilizer absorbing pipeline 5, which is close to the water collecting pipe 4, is provided with an electromagnetic valve 51, and the electromagnetic valve 51 is connected with the control system 2; two ends of the water collecting pipe 4 are respectively communicated with the main pipeline 3 through a first pipeline 41 and a second pipeline 42, the first pipeline 41 is close to the output end 33 of the main pipeline 3, a water pump 8 is arranged on the second pipeline 42 and is close to the input end 31 of the main pipeline 3, and the water pump 8 is preferably a small water pump to form a pressure difference with fertilizer; a detection line 7 communicating with the first line 41; the EC-PH detector is respectively connected with the detection pipeline 7 and the control system 2; the control system 2 calculates the amount of mother liquor required to be input for EC-PH balance adjustment according to an EC-PH setting value and a detection value of the EC-PH detector, controls the corresponding input amount of the mother liquor by controlling the opening and closing of the electromagnetic valve 51, and after the input mother liquor is subjected to primary water-fertilizer mixing with the raw water input from the first pipeline 41 in the water collecting pipe 4, the input mother liquor is conveyed from the second pipeline 42 to the main pipeline 3 through the water pump 8, is subjected to secondary water-fertilizer mixing with the raw water input from the input end, and is output from the output end, so as to complete online real-time EC-PH balance adjustment and stable output of the water-fertilizer (EC is the concentration of soluble salts in the solution or the concentration of soluble ions in the liquid fertilizer or planting medium, and the unit is mS/cm or uS/cm,1mS/cm =1000uS/cm, PH is the acid-base value of the solution, generally considered that 7 is neutral, less than 7 is acidic, and more than 7 is alkaline).
Wherein, the main pipeline 3 is internally provided with. The first pipeline 41 is communicated with the water collecting pipe 4 through a venturi 6, and the fertilizer suction pipeline 5 is connected with the venturi 6 through the electromagnetic valve 51. The venturi 6 is responsible for completing the siphon effect, generating the suction force for absorbing the fertilizer, finally merging into the water collecting pipe 4, and completing the primary mixing of the water and the mother liquor in the water collecting pipe 4. The fertilizer absorbing pipeline 5 is also provided with an electronic flow meter 52, an observation flow meter 53 and a fine adjustment valve 54. Oil pressure gauges 9 are provided at respective ends of the first and second pipes 41 and 42 connected to the main pipe 3. Fertile water gets into first pipeline 41 from one-way water intaking check valve 34, one-way water intaking check valve 34 effect prevents the water reverse flow, the target fertile water after the mixture gets into the fertilization pipeline from output 33, it has all set up oil pressure gauge 9 to get into main line 3 department on one-way water intaking check valve 34 upper portion and second pipeline 42, two oil pressure gauges 9 set up in pairs, the pressure differential between the two has represented the healthy state of fertilizer distributor work, it is how much of pressure promptly to have existed, the size of fertile ability of inhaling has been decided. The second pipeline 42 is also provided with a one-way fertilizer outlet check valve 35 at the position of entering the main pipeline 3.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the detection pipeline 7 according to an embodiment of the present invention. The detection pipeline 7 comprises a detection channel 71, the detection channel 71 is communicated with a detection port 45 arranged on the first pipeline 41, the detection port 45 is provided with an air pipe interface connected with the detection channel 71, the detection channel 71 is provided with an EC-PH detection interface 72, and the EC-PH detector is communicated with the detection channel 71 through the EC-PH detection interface 72.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a third pipeline 43 according to an embodiment of the present invention. The first pipeline 41 is communicated with the water pump 8 through a third pipeline 43, and a backpressure valve 44 is arranged on the third pipeline 43 to avoid idle burning of the water pump 8. The back pressure valve 44 is used for ensuring the water suction of the water pump 8 behind, so that the water pump 8 cannot be empty burnt, and the long-time stable operation of the water pump 8 is protected.
During operation, after raw water inhales main pipeline 3, inhale fertile pipeline 5 accuracy and inhale fertilizer, fertilizer gets into from mother liquor passageway 55, and through observing flowmeter 53 earlier, should observe flowmeter 53 and be used for observing have or not actually inhale fertile and inhale how much of fertile volume, can accomplish through fine setting valve 54 and inhale the balanced regulation of fertile. The trim valve 54 is followed by an electronic flow meter 52, which electronic flow meter 52 is used to complete the metering of the mother liquor. When the fertilizer mother liquor passes through the fertilizing electromagnetic valve 51, the fertilizing electromagnetic valve 51 can be controlled to be over-fertilized, and the fertilizing electromagnetic valve 51 is a high-frequency electromagnetic valve 51 which can quickly open and close the mother liquor channel 55 to complete flow regulation. After the fertilizer suction pipeline 5 finishes sucking the fertilizer, the mother liquor enters the water collecting pipe 4, and the fertilizer enters the main pipeline 3 through the water pump 8 after being mixed for the first time in the water collecting pipe 4. When the water pump 8 is started, a pressure difference is formed in the water collecting pipe 4, so that the venturi 6 is driven to suck fertilizer, and the oil pressure gauge 9 arranged at the connection position of the second pipeline 42 and the main pipeline 3 is used for detecting the pressure difference and assisting in judging faults. Be provided with the helical mixing ware in the fertilizer mixing pipe 32, force former water and fertilizer to fuse fast, accomplish the accurate mixture of liquid manure, accomplish the secondary flash mixed, output stable liquid manure. The quick fertilizer mixing device does not occupy the flow and the lift of the main pipe network of the fertilizer applicator, forms microcirculation in the area of the fertilizer applicator, and simplifies the calculation and design of the fertilizer application pipe network. Compared with a barrel mixing type, the fertilizer mixing water pump is 8 small, the cost is low, the energy is saved, and the water pressure and the flow of the main pump are not lost; the EC-PH adjustment is faster; the spiral rapid fertilizer mixing enables the fertilizer to be distributed more uniformly and the data fluctuation to be more smooth; the fertilizer application requirement of large flow is more conveniently supported.
The EC-PH balance adjusting method of the fertilizer applicator comprises the following steps:
s100, detecting the EC-PH value of the fertilizer water at the outlet end of the fertilizer applicator, and obtaining an EC-PH detection value;
s200, comparing the EC-PH detection value with an EC-PH set value, and calculating the amount of mother liquor to be injected when the balance is adjusted to an EC-PH target value according to an adjustment measuring formula to obtain the corresponding amount of acid liquor or alkali liquor;
s300, injecting mother liquor according to the amount of the acid liquor or the amount of the alkali liquor, and fully mixing the mother liquor with raw water to obtain balanced and adjusted fertilizer water for continuous output; and
and S400, repeating the steps S100-S300 until the EC-PH detection value of the output fertilizer water is stabilized at the EC-PH target value.
Before step S100, the following steps may be further included:
s001, emptying liquid in a fertilizer mixing barrel of the fertilizer applicator, and injecting raw water;
s002, measuring the volume of raw water entering the fertilizer mixing barrel to finish the injection target;
s003, searching a history record, and measuring and calculating the amount of the mother liquor to be injected by adopting the following formula:
EC accumulation calculation formula: a1 ^ E1v1+ a2 ^ E2v2= E3 (v 1+ v 2);
the pH accumulation calculation formula is as follows: b1 { [ pH1v1+ b2 { [ pH2v2= { [ pH3 (v 1+ v 2);
wherein E1 is ec of raw water, E2 is ec of mother liquor, E3 is ec of output fertilizer water, V1 is volume of used raw water, V2 is volume of used mother liquor, V1+ V2 is output fertilizer water volume, a1 is influence coefficient of ec corresponding to raw water on target output value, and a2 is influence coefficient of ec corresponding to mother liquor on target output value; b1 is the influence coefficient of the pH corresponding to the raw water on the target output value, b2 is the influence coefficient of the pH corresponding to the mother liquor on the target output value, pH1 is the pH of the raw water, pH2 is the pH of the mother liquor, and pH3 is the pH of the output fertilizer water; (v 1+ v 2) measuring by adopting a flowmeter, and paying attention to the fact that the volume of the output rich water is approximately equal to v1+ v2, so that the volume is actually replaced by measuring the rich water v3, the formula is a dynamic balance process, and numerical value approximation can be completed only by multi-point cross dynamic sampling; and
and S004, injecting the mother liquor into the raw water according to the measured amount of the mother liquor, and calculating the ec-pH value of the mixed fertilizer water.
In step S003, if no history record exists, injecting the mother liquor according to small batch, and simultaneously completing the calculation of ec-pH by applying the following regulation and calculation formula:
generally, the fertilizer applicator only has one-way regulation capability to avoid acid-base neutralization, so the fertilizer applicator needs to regulate acid or alkali. In engineering practice, EC and pH may not be simultaneously satisfied, so that the target change of EC-pH is required, and under the condition of ensuring EC, the target dosage of pH is adjusted, so that EC and pH are in the target interval as much as possible, and when EC and pH cannot be in the target interval, pH needs to be adjusted to the interval closest to the target.
When the pH in the EC-PH detection value is greater than pHmax, calculating the acid liquid amount V1 'and the corresponding EC1' required for increasing to the pH target value, and the acid liquid amount V2 'and the corresponding EC2' required for increasing to the pHmax value:
v1'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC1'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v1')；
v2'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmax*b2)；
EC2'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v2')；
when EC1 'is in a set range, measuring v1' of the acid liquor; when EC1'< EC2', the acid solution input needs to be reduced, the region where pH can actually reach is increased, the target pH adjustment value pHm is set, and the target pH adjustment value is taken: pHm2= (pHmax + pHm)/2; and calculating the acid addition amount vm according to the target value pHm 2: vm = ([ integral ] pH3 (v 1+ v 2) -b1 { [ integral ] pH1v 1)/(pHm × b 2);
when the pH value is less than pHmin, the acid can not be adjusted, and whether the maximum limit is exceeded or not is judged, and the alkali is required to be adjusted by alarming.
When the pH value is less than pHmin, calculating the lye amount V3 'and the corresponding EC3' required for increasing to the pH target value and the lye amount V4 'and the corresponding EC4' required for increasing to the pHmin value;
v3'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC3'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v3')；
v4'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmin*b2)；
EC4'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v4')；
when EC3 'is within the set value, measuring v3' by the alkali liquor; when EC3'< EC4', the alkali liquor input is reduced, the region where the pH can actually reach is adjusted, the pH adjustment target value pHm is set, and the pH adjustment target value is selected as follows: pHm3= (pHmax + pHm)/2; and calculating the alkali addition amount vj according to the target value pHm 3: vj = ([ pH3 (v 1+ v 2) -b 1: [ pH1v 1)/(pHm × b 2) ].
When the pH value is greater than pHmax, the alkali cannot be adjusted, whether the maximum limit is exceeded is judged, and the acid is required to be adjusted by alarming.
Based on the same inventive concept, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the EC-PH balance adjustment method described above.
Referring to fig. 6, fig. 6 is a schematic diagram of the operation of the fertilizer applicator according to an embodiment of the present invention. After the fertilizer applicator is started at a, the liquid is discharged from the liquid discharge device at b, the liquid in the fertilizer mixing barrel of the fertilizer applicator is discharged to an external pipeline through a water pump 8, the raw water is injected into the liquid discharge device at c, may be pure water or rich water which needs secondary treatment (different projects have different conditions), the water injected into the mixed fertilizer barrel is measured according to the height which is provided by system parameterization, simultaneously measuring the volume of raw water entering the barrel to finish the injection target, entering d to search history, measuring and calculating the mother liquor needing to be injected, wherein the history is the record left by the fertilizer distributor before fertilizer preparation, applying an EC accumulation calculation formula and a pH accumulation calculation formula according to the previously recorded data) to calculate the required mother liquor amount, feeding the mother liquor into the step e, injecting the mother liquor and calculating EC-PH, wherein the mother liquor is the stock solution diluted by the fertilizer, checking the data if the step d has data, if the step d does not find the history, not calculating the mother liquor needing to be injected in advance, injecting mother liquor according to small batch, simultaneously applying an EC accumulation calculation formula, a pH accumulation calculation formula and an EC-PH balance adjustment formula to complete the calculation of EC-PH, and if the process fails, entering a system h to give an alarm, the process failure refers to the detection of various equipment faults), the successful entering of f is calculated, the success is calculated, the mother liquor and the acid-base ratio are calculated, if the calculation fails, the liquor entering of b is discharged for re-execution once during the next fertilizer preparation, and f, if the calculation is finished, the step g is executed and fine-tuned, an EC cumulative calculation formula, a pH cumulative calculation formula and an EC-PH balance adjustment formula are repeatedly used in the process to assist the system to serve as a fine-tuning algorithm, if various faults exist in the process, the step h is failed to give an alarm, and if the faults succeed, the step l is finished.
Compared with the traditional method, the invention increases the flow of pre-preparation and pre-detection, so that the fertilizer applicator can complete high-precision and stable water and fertilizer output at the beginning. Compared with a fertilizer applicator without pre-allocation and pre-detection, the fertilizer applicator can ensure that the yielding water is the target EC and pH, and the fertilizer applicator without the process needs several minutes to complete the definition of the target, and actually, accurate irrigation may only need dozens of seconds, so that the fertilizer applicator has better target execution effect.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. The EC-PH balance adjusting method of the fertilizer applicator is characterized by comprising the following steps:
s100, detecting the EC-PH value of the fertilizer water at the outlet end of the fertilizer applicator, and obtaining an EC-PH detection value;
s200, comparing the EC-PH detection value with an EC-PH set value, and calculating the amount of mother liquor to be injected when the balance is adjusted to an EC-PH target value according to an adjustment measuring formula to obtain the corresponding amount of acid liquor or alkali liquor;
s300, injecting mother liquor according to the amount of the acid liquor or the amount of the alkali liquor, and fully mixing the mother liquor with raw water to obtain balanced and adjusted fertilizer water for continuous output; and
and S400, repeating the steps S100-S300 until the EC-PH detection value of the output fertilizer water is stabilized at the EC-PH target value.
2. The EC-PH balance adjustment method for fertilizer applicators of claim 1, further comprising, before step S100, the steps of:
s001, emptying liquid in a fertilizer mixing barrel of the fertilizer applicator, and injecting raw water;
s002, measuring the volume of raw water entering the fertilizer mixing barrel to finish the injection target;
s003, searching a history record, and calculating the amount of the mother liquor to be injected by adopting the following formula:
EC accumulation calculation formula: a 1: [ integral ] E1v1+ a 2: [ integral ] E2v2= E3 (v 1+ v 2);
the pH accumulation calculation formula is as follows: b1 { [ pH1v1+ b2 { [ pH2v2= { [ pH3 (v 1+ v 2);
wherein E1 is ec of raw water, E2 is ec of mother liquor, E3 is ec of output fertilizer water, V1 is volume of used raw water, V2 is volume of used mother liquor, V1+ V2 is output fertilizer water volume, a1 is influence coefficient of ec corresponding to raw water on target output value, and a2 is influence coefficient of ec corresponding to mother liquor on target output value; b1 is the influence coefficient of the pH corresponding to the raw water on the target output value, b2 is the influence coefficient of the pH corresponding to the mother liquor on the target output value, pH1 is the pH of the raw water, pH2 is the pH of the mother liquor, and pH3 is the pH of the output fertilizer water; and
and S004, injecting the mother liquor into the raw water according to the measured mother liquor amount, and calculating the ec-pH value of the mixed fertilizer water.
3. The EC-PH balance adjustment method for fertilizer applicators of claim 2, wherein in step S003, if there is no history, the mother liquor is injected in small batches, and the EC-PH is calculated by using the following adjustment formula:
when the pH in the EC-PH detection value is greater than pHmax,
calculating the acid liquid amount V1 'and the corresponding EC1' required to increase to the target pH value, and the acid liquid amount V2 'and the corresponding EC2' required to increase to the pHmax value:
v1'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC1'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v1')；
v2'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmax*b2)；
EC2'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v2')；
when EC1 'is in a set range, measuring v1' of the acid liquor; when EC1'< EC2', a pH adjustment target value pHm is set, and the acid addition amount Vm is calculated: vm = ([ pH3 (v 1+ v 2) -b 1: [ pH1v 1)/(pHm × b 2);
when the pH value is less than pHmin, calculating the lye amount V3 'and the corresponding EC3' required for increasing to the pH target value, and calculating the lye amount V4 'and the corresponding EC4' required for increasing to the pHmin value;
v3'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pH2*b2)；
EC3'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v3')；
v4'＝(∫pH3(v1+v2)-b1∫pH1v1)/(pHmin*b2)；
EC4'＝(a1∫E1v1+a2∫E2v2)/(v1+v2+v4')；
when EC3 'is within the set value, measuring v3' by the alkali liquor; when EC3'< EC4', a pH adjustment target value pHm is set, and the amount of added alkali Vj is calculated: vj = ([ integral ] pH3 (v 1+ v 2) -b 1: [ integral ] pH1v 1)/(pHm × b 2).
4. The utility model provides a fertile device is thoughtlessly fast of fertilizer distributor installs in the frame of fertilizer distributor, and with the control system of fertilizer distributor connects, its characterized in that keeps the stable output of liquid manure through the preliminary survey of preassembleing, the fertile device of mixing fast includes:
the input end of the main pipeline is connected with a raw water storage tank of the fertilizer applicator, and the output end of the main pipeline is connected with a fertilizer application pipeline of the fertilizer applicator;
one end of the fertilizer suction pipeline is connected with a mother liquor storage tank of the fertilizer applicator, the other end of the fertilizer suction pipeline is connected with a water collecting pipe, and one end of the fertilizer suction pipeline, which is close to the water collecting pipe, is provided with an electromagnetic valve which is connected with the control system; two ends of the water collecting pipe are respectively communicated with the main pipeline through a first pipeline and a second pipeline, the first pipeline is close to the output end of the main pipeline, and the second pipeline is provided with a water pump and is close to the input end of the main pipeline;
a detection pipeline communicated with the first pipeline;
the EC-PH detector is respectively connected with the detection pipeline and the control system;
the control system calculates the amount of mother liquor required to be input for EC-PH balance adjustment according to an EC-PH set value and a detection value of the EC-PH detector, controls the corresponding input amount of the mother liquor by controlling the opening and closing of the electromagnetic valve, conveys the input mother liquor to the main pipeline from the second pipeline through the water pump after the input mother liquor is subjected to water-fertilizer primary mixing with raw water input from the first pipeline in the water collecting pipe, and outputs the mother liquor from the output end after the water-fertilizer secondary mixing with the raw water input from the input end is completed, so that the water-fertilizer online real-time EC-PH balance adjustment and stable output are completed.
5. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4, wherein a spiral mixer is provided in the main pipeline.
6. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4 or 5, wherein the first pipeline is communicated with the water collecting pipe through a venturi tube, and the fertilizer sucking pipeline is connected with the venturi tube through the electromagnetic valve.
7. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4 or 5, wherein an oil pressure gauge is respectively provided at one end of the first pipeline and the second pipeline connected with the main pipeline.
8. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4 or 5, wherein the first pipeline is communicated with the water pump through a third pipeline, and a back pressure valve is arranged on the third pipeline to prevent the water pump from being burnt without water.
9. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4 or 5, characterized in that the fertilizer suction pipeline is further provided with an electronic flowmeter, an observation flowmeter and a fine adjustment valve.
10. The quick fertilizer mixing device of the fertilizer applicator as claimed in claim 4 or 5, wherein the detection pipeline comprises a detection channel, the detection channel is communicated with a detection port arranged on the first pipeline, an EC-PH detection interface is arranged on the detection channel, and the EC-PH detector is communicated with the detection channel through the EC-PH detection interface.
11. A fertilizer applicator comprising the rapid fertilizer mixing device of any one of claims 4-10.
12. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the EC-PH balance adjustment method of a fertilizer applicator of any one of claims 1 to 3.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107836196A (en) * | 2017-11-09 | 2018-03-27 | 贵州大学 | A kind of water-fertilizer integral fertilizer applicator |
| KR20190028907A (en) * | 2017-09-11 | 2019-03-20 | 양태진 | Controll device of supplying nutrient solution and controll method of the same |
| US10271474B1 (en) * | 2018-02-09 | 2019-04-30 | John C. Miller | Apparatus for automated fertilization and/or irrigation, and methods of making and using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190028907A (en) * | 2017-09-11 | 2019-03-20 | 양태진 | Controll device of supplying nutrient solution and controll method of the same |
| CN107836196A (en) * | 2017-11-09 | 2018-03-27 | 贵州大学 | A kind of water-fertilizer integral fertilizer applicator |
| US10271474B1 (en) * | 2018-02-09 | 2019-04-30 | John C. Miller | Apparatus for automated fertilization and/or irrigation, and methods of making and using the same |
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