CN207541449U - Liquid fertilizer variable deep placement control system - Google Patents
Liquid fertilizer variable deep placement control system Download PDFInfo
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- CN207541449U CN207541449U CN201721506060.6U CN201721506060U CN207541449U CN 207541449 U CN207541449 U CN 207541449U CN 201721506060 U CN201721506060 U CN 201721506060U CN 207541449 U CN207541449 U CN 207541449U
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Abstract
The utility model discloses a kind of liquid fertilizer variable deep placement control systems, and the system comprises microcontroller, RS485 communication interfaces, the first ADC modulate circuits, the 2nd ADC modulate circuits and the 3rd ADC modulate circuits；The microcontroller is connect by RS485 communication interfaces with frequency converter, the frequency converter is connect with motor, motor is used to control pump rotary speed, the water outlet of water pump is connect by pipeline with pressure sensor, flowmeter respectively, pressure sensor is used to detect the pressure of liquid fertilizer in pipeline, and flowmeter is used to detect the liquid fertilizer flow of pump outlet；The input terminal of the first ADC modulate circuits is connect with flowmeter, and output terminal is connect with microcontroller；The input terminal and pressure sensor of the 2nd ADC modulate circuits, output terminal are connect with microcontroller；The input terminal of the 3rd ADC modulate circuits is connect with fluid level transmitter, and output terminal is connect with microcontroller.The utility model can adjust liquid fertilizer flow with real-time variable, improve fertilization effect, have the characteristics that easy to operate, the operation is stable.
Description
Technical field
The utility model is related to a kind of liquid fertilizer variable control system, especially a kind of liquid fertilizer variable deep placement control system belongs to
In variable fertilization of precision agriculture field.
Background technology
Agriculture precision and mechanization put forward liquid fertilizer in recent years, and liquid fertilizer is mainly characterized by fertilizer efficiency height, section branch volume increase
Significant effect, producing cost are low, fertilization mode is convenient, easily absorb.Variable fertilization technology is the important component of precision agriculture,
It can be matched according to profit and loss situation, the agrotype of nutrient in different geographical, soil type and soil using different fertilizer
Side realizes fertilising on demand.Liquid fertilizer variable deep placement is then using mechanical means and Automatic Control Theory etc., according to plant growth feelings
Condition adjusts pipeline flow, and liquid fertilizer conveying is applied on the absorption site of crop root system.
Absorption of the crops to fertilizer is mainly completed by root hair in root system, therefore, it is deep to carry out liquid fertilizer to crops
It applies, fruit tree early growth and quick tiller increasing both production and income can be effectively facilitated, improve the utilization rate of fertilizer.At present, most of fertilization modes mainly according to
It manually applies fertilizer, fertilizing operation is time-consuming, and fertilising efficiency is low；Fertilization time depends entirely on different operations from dose
The passing experience of personnel, it is impossible to the sowing amount of liquid fertilizer be adjusted according to the substantive demand of agricultural production in real time, can not realize fertilising certainly
Dynamicization be easy to cause the defects such as fertilizer wastes, utilization rate of fertilizer is low.
Utility model content
The defects of the purpose of this utility model is to solve the above-mentioned prior art provides a kind of liquid fertilizer variable deep placement control
System, the system can adjust liquid fertilizer flow with real-time variable, improve fertilization effect, have the characteristics that easy to operate, the operation is stable.
The purpose of this utility model can be reached by adopting the following technical scheme that：
A kind of liquid fertilizer variable deep placement control system, including microcontroller, RS485 communication interfaces and the first ADC modulate circuits；
The microcontroller is connect by RS485 communication interfaces with frequency converter, and frequency converter is connect with motor, and motor is used to control
Pump rotary speed, the water outlet of water pump are connect by pipeline with flowmeter, and flowmeter is used to detect the liquid fertilizer flow of pump outlet；
The input terminal of the first ADC modulate circuits is connect with flowmeter, and output terminal is connect with microcontroller.
Preferably, the water outlet of the water pump is also connect by pipeline with pressure sensor, and pressure sensor is used to detect
The pressure of liquid fertilizer in pipeline；
The system also includes the 2nd ADC modulate circuits, the input terminal and pressure sensing of the 2nd ADC modulate circuits
Device, output terminal are connect with microcontroller.
Preferably, the system also includes the 2nd ADC modulate circuits, the input terminals and pressure of the 2nd ADC modulate circuits
Force snesor connects, and output terminal is connect with microcontroller.
Preferably, the system also includes host computer, the host computer is connect using wireless mode with microcontroller.
Preferably, the host computer is connect with the first wireless data transmission module, the microcontroller and the second wireless data transmission module
Connection, the first wireless data transmission module and the second wireless data transmission module carry out wireless connection.
Preferably, the system also includes matrix keyboard and display screen, the matrix keyboard and display screen respectively with monolithic
Machine connects.
Preferably, the system also includes warning circuit, the warning circuit is connect with microcontroller.
The utility model has following advantageous effect relative to the prior art：
1st, the flow that flowmeter detects can be converted into number by the utility model by the first ADC modulate circuits
Signal, obtains the variable quantity of flow error and flow error, and microcontroller is obtained according to flow error and the variable quantity of flow error
The control instruction is sent to frequency converter by new control instruction by RS485 communication interfaces, and control frequency converter changes turning for motor
Speed so as to adjust pump rotary speed, makes liquid fertilizer stability of flow in pipeline realize the control of liquid fertilizer flow, raising is applied in setting value
Fertilizer efficiency fruit, control technology reaction is sensitiveer, and control flow is more accurate；In addition, microcontroller passes through RS485 communication interfaces and frequency conversion
Device connects, i.e., using the work of RS485 communication interfaces control frequency converter, antijamming capability is stronger, makes system work more reliable；Together
When, it is connect using frequency converter with motor, makes motor that need not work in highest frequency state always, it is more energy saving.
2nd, the utility model can in real time detect pipeline liquid fertilizer pressure change by pressure sensor, pass through liquid level
Transmitter can monitor the variation of liquid fertilizer liquid level in real time, and the service condition for liquid fertilizer amount provides effective reference, and passes through
The liquid fertilizer pressure value that pressure sensor detects is converted into digital signal by two ADC modulate circuits, when liquid fertilizer pressure is more than setting
Limiting pressure when, reduce the working frequency of frequency converter, if being continued above the limiting pressure of setting, stop frequency converter work,
And the liquid fertilizer surplus that fluid level transmitter detects is converted by digital signal by the 3rd ADC modulate circuits, when liquid fertilizer consumes
When to the greatest extent, microcontroller sends instructions to frequency converter by RS485 communication interfaces, and control frequency converter is stopped, so as to stop motor
With the rotation of water pump, with the safety of safeguards system.
3rd, the utility model can realize remote monitoring and remote operation by host computer, it is not necessary to close circuit system, from
And the safety of work is improved, the historical record of user's cocoa inquiry liquid fertilizer flow and the flow system flow of default different periods
Value, human-computer interaction interface is succinctly friendly, offers convenience for production；In addition it is also possible to by the cooperation of matrix keyboard and display screen,
Realization directly controls system, and matrix keyboard can set liquid fertilizer workflow magnitude, system working pressure limiting value, display screen
It can show the liquid fertilizer flow value of setting, can also show the pressure value of pressure sensor detection, the flow value of flowmeter detection
With the liquid level of fluid level transmitter detection.
4th, the utility model is also provided with warning circuit, is set when pressure sensor detects that pipeline liquid fertilizer pressure is continued above
Determine limiting pressure or when liquid level sensor detects that liquid fertilizer exhausts, warning circuit can send out alarm, more secure when used reliable.
Description of the drawings
Fig. 1 is the structure diagram of the liquid fertilizer variable deep placement control system of the utility model embodiment 1.
Fig. 2 is the groundwork flow chart of the liquid fertilizer variable deep placement control system of the utility model embodiment 1.
Fig. 3 is the structure diagram of the liquid fertilizer variable deep placement control system of the utility model embodiment 2.
Fig. 4 is the structure diagram of the liquid fertilizer variable deep placement control system of the utility model embodiment 3.
Wherein, 1- microcontrollers, 2-RS485 communication interfaces, the first ADC modulate circuits of 3-, 4- frequency converters, 5- motors, 6- water
Pump, 7- flowmeters, 8- fertilization guns, 9- pressure sensors, the 2nd ADC modulate circuits of 10-, the 3rd ADC modulate circuits of 11-, 12- liquid
Pressure transmitter, 13- host computers, 14- matrix keyboards, 15- display screens, the first wireless data transmission modules of 16-, the second wireless data sendings of 17-
Module, 18- warning circuits.
Specific embodiment
The utility model is described in further detail with reference to embodiment and attached drawing, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment 1：
As shown in Figure 1, the liquid fertilizer variable deep placement control system of the present embodiment include microcontroller 1, RS485 communication interfaces 2 with
And the first ADC modulate circuits 3.
The microcontroller 1 is the core of entire controller, and kernel is used to be built-in with PID for cortex-M series monolithics
(proportional-integral-differential) control algolithm, microcontroller 1 are connect by RS485 communication interfaces 2 with frequency converter 4, frequency converter 4 and motor
5 connections, for controlling 6 rotating speed of water pump, the water outlet of water pump 6 is connect motor 5 by pipeline with flowmeter 7, and flowmeter 7 is used to examine
The liquid fertilizer flow of pump outlet is surveyed, and is connect with fertilization gun 8.
The input terminal of the first ADC modulate circuits 3 is connect with flowmeter 7, and output terminal is connect with microcontroller 1, flowmeter 7
The flow value detected is converted into digital quantity by the first ADC modulate circuits 3, is handled by microcontroller 1；Wherein, the first ADC
The precision of modulate circuit 3 is not less than 10.
Further, the water outlet of the water pump is also connect by pipeline with pressure sensor 9, and pressure sensor 9 is used for
The pressure of liquid fertilizer in pipeline is detected, corresponding to this, the liquid fertilizer variable deep placement control system of the present embodiment further includes the 2nd ADC conditionings
Circuit 10, the input terminal of the 2nd ADC modulate circuits 10 are connect with pressure sensor 9, and output terminal is connect with microcontroller 1, pressure
The pressure signal that force snesor 9 detects is converted into digital quantity by the 2nd ADC modulate circuits 10, is handled by microcontroller 1；
Similarly, the precision of the 2nd ADC modulate circuits 10 is not less than 10.
Further, the liquid fertilizer variable deep placement control system of the present embodiment further includes the 3rd ADC modulate circuits 11, third
The input terminal of ADC modulate circuits 11 is connect with fluid level transmitter 12, and output terminal is connect with microcontroller 1, and fluid level transmitter 12 detects
To liquid level signal digital quantity is converted by the 3rd ADC modulate circuits 11, handled by microcontroller 1, the 3rd ADC conditioning electricity
The precision on road 11 is not less than 10；Similarly, the precision of the 3rd ADC modulate circuits 11 is not less than 10.
In order to realize the control of microcontroller 1, the liquid fertilizer variable deep placement control system of the present embodiment further includes host computer 13, square
Battle array keyboard 14 and display screen 15, i.e. microcontroller 1 can both be controlled by host computer 13, can also be controlled by matrix keyboard 14,
Simultaneously relevant information is shown using display screen 15.
The host computer 13 is connect using wireless mode with microcontroller 1, specially：13 and first wireless data sending mould of host computer
Block 16 connects, and microcontroller 1 is connect with the second wireless data transmission module 17, the first wireless data transmission module 16 and the second wireless data transmission module
17 carry out wireless connection so that can be carried out wireless communication between host computer 13 and microcontroller 1, host computer 13 can be with monitoring system
The working condition of sensor (flowmeter 7, pressure sensor 9) can set liquid fertilizer and spray flow, setting spraying time section and note
History logging is recorded, frequency converter 4 can also be started or stoped and worked.
The matrix keyboard 14 is connect with microcontroller 1, can be used for setting liquid fertilizer workflow magnitude, system working pressure pole
Limit value, can be also used for starting or stoping frequency converter 4 and works.
The display screen 15 is connect with microcontroller 1, is displayed for the liquid fertilizer flow value of setting, be can be also used for showing
The liquid level of the pressure value of pressure sensor detection, the flow value of flowmeter detection and fluid level transmitter detection.
It will be appreciated by persons skilled in the art that various threshold values can also be previously set in the microcontroller 1 of the present embodiment, lead to
It crosses automatically controlling for microcontroller 1 and realizes liquid fertilizer variable deep placement.
In order to realize warning function, the liquid fertilizer variable deep placement control system of the present embodiment further includes warning circuit 18, described
Warning circuit 18 is connect with microcontroller 1, when pressure sensor 9 detects that pipeline liquid fertilizer pressure is continued above setting limit pressure,
Or liquid level sensor 12, when detecting that liquid fertilizer exhausts, which can send out alarm.
As depicted in figs. 1 and 2, the liquid fertilizer variable deep placement control system operation principle of the present embodiment is as follows：
S1, the working flow that system is set by host computer 13 or matrix keyboard 14, after determining, start control system work
Make；
The flow that flowmeter 7 detects is converted into digital signal by S2, the first ADC modulate circuits 3, this digital signal is with setting
Constant flow relatively after, obtain the variable quantity of flow error and flow error, transported according to the variable quantity of flow error and flow error
Row pid control algorithm obtains new control instruction, and the control instruction is sent to frequency converter 4 by RS485 communication interfaces 2, control
Frequency converter 4 changes the rotating speed of motor 5, so as to adjust 6 rotating speed of water pump, makes the liquid fertilizer stability of flow in pipeline in setting value；
The liquid fertilizer pressure value that pressure sensor 9 detects is converted into digital signal by S3, the 2nd ADC modulate circuits 10, when
When liquid fertilizer pressure is more than the limiting pressure of setting, the working frequency of frequency converter 4 is reduced, if being continued above the limiting pressure of setting,
Then stop frequency converter 4 to work, while warning circuit 18 sends out alarm.
The liquid fertilizer surplus that fluid level transmitter 12 detects is converted into digital signal by S4, the 3rd ADC modulate circuits 11, when
When liquid fertilizer exhausts, microcontroller 1 sends instructions to frequency converter 4 by RS485 communication interfaces, and control frequency converter 4 is stopped, so as to
Stop the rotation of motor 5 and water pump 6, while warning circuit 18 sends out alarm.
Above-mentioned steps S2~S4 can be carried out at the same time after system work.
S5, after warning circuit 18 sends out alarm, system stalls.
S6, after work, pass through host computer 13 or 14 stop control system of matrix keyboard and work.
Embodiment 2：
As shown in figure 3, the liquid fertilizer variable deep placement control system of the present embodiment includes microcontroller 1, RS485 communication interfaces 2, the
One ADC modulate circuits 3, the 2nd ADC modulate circuits 10, the 3rd ADC modulate circuits 11, host computer 13 and warning circuit 18 namely
The microcontroller 1 of the present embodiment is only controlled by host computer 13.Remaining is the same as embodiment 1.
Embodiment 3：
As shown in figure 4, microcontroller 1, RS485 communication interfaces 2, the first ADC modulate circuits 3, the 2nd ADC modulate circuits 10,
The microcontroller 1 of the 3rd ADC modulate circuits 11, matrix keyboard 14, display screen 15 and warning circuit 18 namely the present embodiment is only by upper
Position machine 13 is controlled.Remaining is the same as embodiment 1.
In conclusion the utility model can be turned the flow that flowmeter detects by the first ADC modulate circuits
It changes digital signal into, obtains the variable quantity of flow error and flow error, microcontroller is according to the change of flow error and flow error
Change amount obtains new control instruction, the control instruction is sent to frequency converter by RS485 communication interfaces, control frequency converter changes
The rotating speed of motor so as to adjust pump rotary speed, makes the liquid fertilizer stability of flow in pipeline in setting value, the control of realization liquid fertilizer flow
System improves fertilization effect, and control technology reaction is sensitiveer, and control flow is more accurate；In addition, microcontroller is communicated by RS485
Interface is connect with frequency converter, i.e., using the work of RS485 communication interfaces control frequency converter, antijamming capability is stronger, makes system work
Make more reliable；Meanwhile connect using frequency converter with motor, make motor that need not work in highest frequency state always, it is more energy saving.
The above, only the utility model patent preferred embodiment, but the protection domain of the utility model patent is simultaneously
Not limited to this, any one skilled in the art is in the range disclosed in the utility model patent, according to this
Technical solution and its utility model design of utility model patent are subject to equivalent substitution or change, belong to the utility model patent
Protection domain.
Claims (7)
1. a kind of liquid fertilizer variable deep placement control system, it is characterised in that：Including microcontroller, RS485 communication interfaces and the first ADC
Modulate circuit；
The microcontroller is connect by RS485 communication interfaces with frequency converter, and frequency converter is connect with motor, and motor is used to control water pump
Rotating speed, the water outlet of water pump are connect by pipeline with flowmeter, and flowmeter is used to detect the liquid fertilizer flow of pump outlet；
The input terminal of the first ADC modulate circuits is connect with flowmeter, and output terminal is connect with microcontroller.
2. a kind of liquid fertilizer variable deep placement control system according to claim 1, it is characterised in that：The water outlet of the water pump
It is also connect by pipeline with pressure sensor, pressure sensor is used to detect the pressure of liquid fertilizer in pipeline；
The system also includes the 2nd ADC modulate circuits, input terminal and the pressure sensor of the 2nd ADC modulate circuits connect
It connects, output terminal is connect with microcontroller.
3. a kind of liquid fertilizer variable deep placement control system according to claim 1, it is characterised in that：The system also includes
Three ADC modulate circuits, the input terminal of the 3rd ADC modulate circuits are connect with fluid level transmitter, and output terminal is connect with microcontroller.
4. according to a kind of liquid fertilizer variable deep placement control system of claim 1-3 any one of them, it is characterised in that：The system
Host computer is further included, the host computer is connect using wireless mode with microcontroller.
5. a kind of liquid fertilizer variable deep placement control system according to claim 4, it is characterised in that：The host computer and first
Wireless data transmission module connects, and the microcontroller is connect with the second wireless data transmission module, and the first wireless data transmission module and second is wirelessly
Digital transmission module carries out wireless connection.
6. according to a kind of liquid fertilizer variable deep placement control system of claim 1-3 any one of them, it is characterised in that：The system
Matrix keyboard and display screen are further included, the matrix keyboard and display screen are connect respectively with microcontroller.
7. according to a kind of liquid fertilizer variable deep placement control system of claim 1-3 any one of them, it is characterised in that：The system
Warning circuit is further included, the warning circuit is connect with microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721506060.6U CN207541449U (en) | 2017-11-13 | 2017-11-13 | Liquid fertilizer variable deep placement control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721506060.6U CN207541449U (en) | 2017-11-13 | 2017-11-13 | Liquid fertilizer variable deep placement control system |
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| Publication Number | Publication Date |
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| CN207541449U true CN207541449U (en) | 2018-06-26 |
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| CN201721506060.6U Active CN207541449U (en) | 2017-11-13 | 2017-11-13 | Liquid fertilizer variable deep placement control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741716A (en) * | 2017-11-13 | 2018-02-27 | 华南农业大学 | Liquid fertilizer variable deep placement control system and control method |
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2017
- 2017-11-13 CN CN201721506060.6U patent/CN207541449U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741716A (en) * | 2017-11-13 | 2018-02-27 | 华南农业大学 | Liquid fertilizer variable deep placement control system and control method |
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