CN107741713A - A kind of intelligent water pump controller based on Internet of Things - Google Patents
A kind of intelligent water pump controller based on Internet of Things Download PDFInfo
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- CN107741713A CN107741713A CN201711032084.7A CN201711032084A CN107741713A CN 107741713 A CN107741713 A CN 107741713A CN 201711032084 A CN201711032084 A CN 201711032084A CN 107741713 A CN107741713 A CN 107741713A
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- circuit
- water pump
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- information
- microprocessor
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The present invention relates to water pump control technology field, specifically disclose a kind of intelligent water pump controller based on Internet of Things, provided with microprocessor and connected water pump control circuit, control relay circuit, key control circuit, pump motor is connected with the water pump control circuit, the pump motor is connected with water pump, it is additionally provided with the WIFI module circuit being connected with the microprocessor, network interface circuit, sensor circuit, circuit state measuring circuit, condition indication circuit, and connect the power supply of the microprocessor and all of above circuit.The beneficial effects of the present invention are, using integral structure, the communication network to interconnect is formed with Internet Server and intelligent network terminal, the parameters such as information such as pressure, water temperature of the sensor remote monitoring water pump set according to short range, complete the automatic pumping control of water pump, operating parameter information is shown, abnormal alarm, abend, RS485 alarms, the function such as log management.
Description
Technical field
The present invention relates to water pump control technology field, more particularly to a kind of intelligent water pump controller based on Internet of Things.
Background technology
In production automation occasion and building, there is substantial amounts of blower fan, water pump, for cost consideration, it is common to use
Button, electrothermal relay etc. are as control protection element.There is design defect in electrothermal relay, poor repeatability, reliability are low, deposit in itself
In protection hidden danger, and there is the defects of control circuit is complicated, function is single, later maintenance is difficult in traditional water pump control mode.
Therefore traditional water pump control mode can not substantially meet information-based and intelligentized functional requirement.The development of microcontroller, survey
The maturation of protection technique is measured, gradually changes the application mode of traditional water pump, from button indicating lamp to integral and intelligent controller
Transformation.
Traditional water pump control mode, when pond there is not water, can not remote control water pump start and draw water, and water is set
The time of pumping of pump；And it can not brake according to the water level in pond and stop or open water pump, automatic pumping, remote monitoring water pump
Parameters, including the information such as pressure, water temperature, water level, electric current, power consumption；And when there is abnormality, Wu Fatong
Cross internet and abnormal state information is pushed to user mobile phone end, remind user's pumping plant abnormality etc. occur.
The content of the invention
The present invention provides a kind of intelligent water pump controller based on Internet of Things, and the technical problem of solution is traditional water pump
Control mode control circuit is complicated, function is single, later maintenance is difficult.
To solve above technical problem, the present invention provides a kind of intelligent water pump controller based on Internet of Things, provided with micro- place
Device and connected water pump control circuit, control relay circuit, key control circuit are managed, is connected on the water pump control circuit
Pump motor is connected to, the pump motor is connected with water pump, is additionally provided with WIFI module circuit, the net being connected with the microprocessor
Network interface circuit, sensor circuit, circuit state measuring circuit, condition indication circuit, and, connect the microprocessor and with
The power supply of upper all circuits；
The WIFI module circuit, network interface circuit are used for the microprocessor and Internet Server UNICOM；
The sensor circuit is used to obtain the operating parameter information of the water pump and is sent to the microprocessor；
The circuit state measuring circuit is used for the global power information for gathering the microprocessor and all of above circuit
And it is sent to the microprocessor；
The microprocessor is used for the work letter that the user of the key control circuit is inputted to key information, relay certainly
Breath, the operating parameter information of the water pump, the global power information, are stored and are analyzed and send corresponding state instruction
Instruct the condition indication circuit；And the Internet Server is uploaded to jointly with state instruction instruction and supplies it
Storage, analyze and be accessed；
The condition indication circuit is used to respond the state instruction instruction and send corresponding condition indicative signal.
Further, the network interface circuit includes RJ45 network interface circuits and RS485 interface circuits；Micro- place
Reason device passes through internet by the WIFI module circuit or the RJ45 network interface circuits connection route device, the router
Connect the Internet Server；Or the microprocessor connects gateway by the RS485 interface circuits or main frame is set
Standby, the gateway or host device pass through the WIFI module circuit or the RJ45 network interface circuits connection route device, institute
State router and connect the Internet Server.
Further, the RS485 interface circuits are accessed RS485 buses by the microcontroller, by the intelligent water pump
Controller is as main frame；Or the microcontroller accesses the RS485 buses by RS485 interface circuits connection
The gateway or host device, using the intelligent water pump controller as slave.
Specifically, the operating parameter information of the water pump includes pressure information, temperature information, water level information, the electricity of water pump
Stream information, information of voltage etc..
Specifically, the condition indication circuit includes LCD display circuit, LED indicating circuit, buzzer circuit, the shape
State indication signal includes LCD presentation of information, the LED frequencies that the LCD display circuit, LED indicating circuit, buzzer circuit are sent
Dodge, buzzer warning sound.
Specifically, the operating parameter information of water pump described in the LCD display circuit real-time display.
Specifically, intelligent network terminal is by Internet Server described in network access, obtain corresponding daily record of work with
Data sheet.
Specifically, the sensor circuit is provided with collection sensor and is reserved with analog signal interface, the simulation letter
Number interface is used to set up collection sensor.
A kind of intelligent water pump controller based on Internet of Things provided by the invention, using integral structure, taken with internet
Business device and intelligent network terminal form the communication network to interconnect, using computer electron controls technology, integrated use work(
The technologies such as rate e measurement technology, anti-rust technology, abnormal state detection, the sensor remote monitoring water pump set according to short range
The parameters such as information such as pressure, water temperature, complete water pump automatic pumping control, operating parameter information show, abnormal alarm,
Abend, RS485 alarms, the function such as log management, not only control circuit is simple, feature-rich, later maintenance is simple, also big
The big service life for adding water pump, reduces the fault rate of water pump, meets information-based and intelligentized functional requirement.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention；
Fig. 2 is provided in an embodiment of the present invention a kind of to pass through WIFI module circuit based on the intelligent water pump controller of Internet of Things
Or the Principle of Communication figure of RJ45 network interface circuits connection Internet Server；
Fig. 3 be it is provided in an embodiment of the present invention it is a kind of based on the intelligent water pump controller of Internet of Things pass through RS485 interfaces electricity
Road and the Principle of Communication figure of WIFI module circuit or RJ45 network interface circuits connection Internet Server；
Fig. 4 be it is provided in an embodiment of the present invention it is a kind of based on the intelligent water pump controller of Internet of Things as main frame when 485
Network architecture diagram；
Fig. 5 be it is provided in an embodiment of the present invention it is a kind of based on the intelligent water pump controller of Internet of Things as slave when 485
Network architecture diagram；
Fig. 6 is a kind of automatic pumping control work(of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention
Can block diagram；
Fig. 7 is a kind of abnormal alarm functional block of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention
Figure；
Fig. 8 is a kind of functional block that abends of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention
Figure；
Fig. 9 is a kind of intelligent water pump controller intelligent water pump controller day based on Internet of Things provided in an embodiment of the present invention
Will management function block diagram；
Figure 10 is a kind of intelligent water pump controller intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention
485 warning function block diagrams.
Embodiment
Embodiments of the present invention are specifically illustrated below in conjunction with the accompanying drawings, embodiment is only given for illustrative purposes,
Limitation of the invention can not be interpreted as, including accompanying drawing is only for reference and explanation uses, and does not form to patent protection of the present invention
The limitation of scope, because on the basis of spirit and scope of the invention is not departed from, many changes can be carried out to the present invention.
A kind of theory diagram of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention, as shown in figure 1,
In the present embodiment, a kind of intelligent water pump controller based on Internet of Things is provided with microprocessor 1 and connected water pump controls
Circuit 2, control relay circuit 3, key control circuit 4, pump motor, the water are connected with the water pump control circuit 2
Pump motor is connected with water pump, is additionally provided with the WIFI module circuit 5 being connected with the microprocessor 1, network interface circuit 6, sensing
Device circuit 7, circuit state measuring circuit 8, condition indication circuit 9, and, connect the microprocessor 1 and all of above circuit
Power supply 10；
The WIFI module circuit 5, network interface circuit 6 are used to join the microprocessor 1 and Internet Server S
It is logical；
The sensor circuit 7 is used to obtain the operating parameter information of the water pump and is sent to the microprocessor 1；
The circuit state measuring circuit 8 is used for the overall situation telecommunications for gathering the microprocessor 1 and all of above circuit
Cease and be sent to the microprocessor 1, including the information such as electric current, voltage, power consumption；
The microprocessor 1 is used for the user of the key control circuit 4 is (described from key information, relay is inputted
In control relay circuit) job information, the operating parameter information of the water pump, the global power information, stored
And analyze and send corresponding state instruction instruction and arrive the condition indication circuit 9；It is and common with state instruction instruction
The Internet Server S is uploaded to for its storage, analysis and is accessed；
The condition indication circuit 9 is used to respond the state instruction instruction and send corresponding condition indicative signal.
Specifically, the operating parameter information of the water pump includes pressure information, temperature information, water level information, the electricity of water pump
Stream information, information of voltage etc..
Specifically, the condition indication circuit 9 includes LCD display circuit 91, LED indicating circuit 92, buzzer circuit 93,
The condition indicative signal includes the LCD information that the LCD display circuit 91, LED indicating circuit 92, buzzer circuit 93 are sent
It has been shown that, LED stroboscopics, buzzer warning sound.
Specifically, the operating parameter information of water pump described in the real-time display of LCD display circuit 91, display include work electricity
The information such as pressure, operating current, water position status, pressure state, time, working condition.
Specifically, in the key control circuit 4, user, from key information is inputted, can directly control intelligence by button
The working method of energy water pump controller, the operating parameter information of intelligent water pump controller can be set.
Specifically, intelligent network terminal is by Internet Server S described in network access, obtain corresponding daily record of work with
Data sheet.
Specifically, the sensor circuit 7 is provided with collection sensor and is reserved with analog signal interface, the simulation letter
Number interface is used to set up collection sensor, can be according to user's request, from suitable sensor such as pressure sensor, TEMP
Device etc., the operating parameter information of the water pump is obtained exactly comprehensively.
Specifically, the control relay circuit 3 of the intelligent water pump controller uses powerful professional relay, can have
The service life of the extension of the effect controller.
Specifically, the network interface circuit 6 includes RJ45 network interface circuits 61 and RS485 interface circuits 62；It is described
Microprocessor 1 is led to by the WIFI module circuit 5 or the connection route device of the RJ45 network interface circuits 61, the router
Cross internet and connect the Internet Server S, as shown in Fig. 2 being provided in an embodiment of the present invention a kind of based on Internet of Things
The communication that intelligent water pump controller connects Internet Server S by WIFI module circuit 5 or RJ45 network interface circuits 61 is former
Reason figure.
Or the microprocessor 1 connects gateway or host device, the gateway by the RS485 interface circuits 62
Or host device passes through the WIFI module circuit 5 or the connection route device of the RJ45 network interface circuits 61, the router
The Internet Server S is connected, as shown in figure 3, being a kind of intelligent water pump based on Internet of Things provided in an embodiment of the present invention
Controller connects Internet Server S by RS485 interface circuits 62 and WIFI module circuit 5 or RJ45 network interface circuits 61
Principle of Communication figure.
Further, the RS485 interface circuits 62 are accessed RS485 buses by the microcontroller, by the intelligent water
Pump controller is as main frame, as shown in figure 4, being a kind of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention
485 network architecture diagrams during as main frame.
Or the microcontroller accesses the net of the RS485 buses by the RS485 interface circuits 62 connection
Pass or host device, using the intelligent water pump controller as slave, as shown in figure 5, being one kind provided in an embodiment of the present invention
485 network architecture diagrams during based on the intelligent water pump controller of Internet of Things as slave.
The intelligent water pump controller has reserved RS485 interfaces, can be used as HPI, external RS485 bus apparatus, enter
Row information collection, equipment control etc., can act also as slave interface, and the information for uploading intelligent water pump controller collection takes to internet
Be engaged in device S or, perform control command that the Internet Server S is sent etc..
The compatible wireless WIFI schemes of the intelligent water pump controller, RJ45 network interfacing schemes, RS485 interface schemes, root
Used according to the actual conditions flexibly configurable of user.
A kind of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention, achievable basic function have far
The control of journey automatic pumping, operating parameter information are shown, abnormal alarm, abend, RS485 alarms, log management etc., below it is right
Some of which function is described, also as just a preferred embodiment.
Automatic pumping control function：
It is a kind of automatic pumping of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention referring to Fig. 6
Control function block diagram, this figure is based on Fig. 4 connected mode.Water level information is collected into micro- place by the level sensor on water pump
Device 1 is managed, microprocessor 1 carries out anti-interference filtration algorithm, and setup parameter according to user etc. to the signal of collection, drawn water
Action.As sensor detects middle water level, pumping action is then begun to, when detecting high water level, stop pumping action.Often
Action message once passes to Internet Server S according to user's needs, may be selected to be pushed to the intelligent mobile terminal of user such as
Mobile phone terminal (push of cell phone application software or short message push specifically, can be used) etc..
Abnormal alarm and the function that abends：
Referring to Fig. 7 and Fig. 8 is a kind of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention respectively
Abnormal alarm and the functional block diagram to abend, Fig. 7 and Fig. 8 is still based on Fig. 4 connected mode, i.e., intelligent water pump controls
When device is as main frame, the various key messages of the sensor persistent collection water pump correlation on water pump, as pressure information, temperature are believed
Breath, current information, water level information, information of voltage etc. are sent to microprocessor 1, and microprocessor 1 (inside sets software and user's setting
Range parameter) information is handled, and contrast user setting detection range, if overruning, according to setting for user
Put, stop water pump action, to protect integral device without damage, and by the intelligent mobile of corresponding alarm information pushing to user
Terminal such as mobile phone terminal etc. is to remind user.
Log management function：
It is a kind of intelligent water pump controller intelligent water pump control based on Internet of Things provided in an embodiment of the present invention referring to Fig. 9
Device log management function block diagram processed.The electricity upper each time of intelligent water pump controller, starts, each time push alarm, often each time
It once found the abnormal situation, can record daily record, and packet is uploaded into Internet Server S, if can not temporarily join
It is online to pass, then information is stored in local memory chip, uploaded onto the server after waiting networking.User can pass through mobile phone
App checks log information.
485 warning functions：
It is a kind of intelligent water pump controller intelligent water pump control based on Internet of Things provided in an embodiment of the present invention referring to Figure 10
The warning function block diagram of device 485 processed.When intelligent water pump controller is as slave or slave unit, it can be sent and reported by RS485 buses
Alert information uploads to Internet Server S to main frame, then by main frame.
A kind of intelligent water pump controller based on Internet of Things provided in an embodiment of the present invention, it is and mutual using integral structure
Networked server S and intelligent network terminal form the communication network to interconnect, comprehensive using computer electron controls technology
With technologies such as power measurement technology, anti-rust technology, abnormal state detections, the sensor remote monitoring set according to short range
The parameters of the water pump such as information such as pressure, water temperature, draw water control, the operating parameter information of remote auto for completing water pump show
Show, abnormal alarm, abend, RS485 alarms, the function such as log management, not only control circuit is simple, the feature-rich, later stage
Safeguard simply, also greatly increases the service life of water pump, reduce the fault rate of water pump, meet information-based and intelligentized
Functional requirement.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (8)
1. a kind of intelligent water pump controller based on Internet of Things, provided with microprocessor and connected water pump control circuit, after
Electrical apparatus control circuit, key control circuit, pump motor are connected with the water pump control circuit, the pump motor is connected with
Water pump, it is characterised in that be additionally provided with the WIFI module circuit being connected with the microprocessor, network interface circuit, sensor electricity
Road, circuit state measuring circuit, condition indication circuit, and, the power supply for connecting the microprocessor and all of above circuit is electric
Source；
The WIFI module circuit, network interface circuit are used for the microprocessor and Internet Server UNICOM；
The sensor circuit is used to obtain the operating parameter information of the water pump and is sent to the microprocessor；
The circuit state measuring circuit is used to gather the microprocessor and the global power information of all of above circuit is concurrent
It is sent to the microprocessor；
The microprocessor be used for by the user of the key control circuit from input key information, relay job information,
The operating parameter information of the water pump, the global power information, are stored and are analyzed and state instruction refers to corresponding to sending
Make the condition indication circuit；And the Internet Server is uploaded to jointly with state instruction instruction and is deposited for it
Storage, analyze and be accessed；
The condition indication circuit is used to respond the state instruction instruction and send corresponding condition indicative signal.
A kind of 2. intelligent water pump controller based on Internet of Things as claimed in claim 1, it is characterised in that：The network interface
Circuit includes RJ45 network interface circuits and RS485 interface circuits；The microprocessor passes through the WIFI module circuit or institute
RJ45 network interface circuit connection route devices are stated, the router connects the Internet Server by internet；Or institute
State microprocessor and pass through described by RS485 interface circuits connection gateway or host device, the gateway or host device
WIFI module circuit or the RJ45 network interface circuits connection route device, the router connect the Internet Server.
A kind of 3. intelligent water pump controller based on Internet of Things as claimed in claim 2, it is characterised in that：The microcontroller
The RS485 interface circuits are accessed into RS485 buses, using the intelligent water pump controller as main frame；Or the microcontroller
Device accesses the gateway or host device of the RS485 buses by RS485 interface circuits connection, by the intelligent water
Pump controller is as slave.
A kind of 4. intelligent water pump controller based on Internet of Things as claimed in claim 1, it is characterised in that：The work of the water pump
Make pressure information, temperature information, water level information, current information, information of voltage that parameter information includes water pump.
A kind of 5. intelligent water pump controller based on Internet of Things as claimed in claim 4, it is characterised in that：The state instruction
Circuit includes LCD display circuit, LED indicating circuit, buzzer circuit, and the condition indicative signal includes LCD display electricity
LCD presentation of information that road, LED indicating circuit, buzzer circuit are sent, LED stroboscopics, buzzer warning sound.
A kind of 6. intelligent water pump controller based on Internet of Things as claimed in claim 1, it is characterised in that：The LCD is shown
The operating parameter information of water pump described in circuit real-time display.
A kind of 7. intelligent water pump controller based on Internet of Things as claimed in claim 1, it is characterised in that：Intelligent network terminal
By Internet Server described in network access, corresponding daily record of work and data sheet are obtained.
A kind of 8. intelligent water pump controller based on Internet of Things as claimed in claim 1, it is characterised in that：The sensor electricity
Road is provided with collection sensor and is reserved with analog signal interface, and the analog signal interface is used to set up collection sensor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711032084.7A CN107741713A (en) | 2017-10-30 | 2017-10-30 | A kind of intelligent water pump controller based on Internet of Things |
| PCT/CN2017/110591 WO2019085002A1 (en) | 2017-10-30 | 2017-11-10 | Intelligent water pump controller based on internet of things |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711032084.7A CN107741713A (en) | 2017-10-30 | 2017-10-30 | A kind of intelligent water pump controller based on Internet of Things |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107741713A true CN107741713A (en) | 2018-02-27 |
Family
ID=61233000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711032084.7A Pending CN107741713A (en) | 2017-10-30 | 2017-10-30 | A kind of intelligent water pump controller based on Internet of Things |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107741713A (en) |
| WO (1) | WO2019085002A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108549298A (en) * | 2018-06-04 | 2018-09-18 | 惠州良信智能科技有限公司 | A kind of intelligent water pump controller based on LAN |
| CN108661898A (en) * | 2018-06-06 | 2018-10-16 | 惠州良信智能科技有限公司 | A kind of intelligent water pump controller for wisdom agricultural irrigation |
| CN110278224A (en) * | 2018-03-15 | 2019-09-24 | 罗森伯格（上海）通信技术有限公司 | A kind of monitoring system and monitoring method based on NB-IoT |
| CN110439794A (en) * | 2019-08-13 | 2019-11-12 | 中铁隧道集团三处有限公司 | A kind of pump machine wireless control system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203230561U (en) * | 2013-03-18 | 2013-10-09 | 北京联创思源测控技术有限公司 | Remote intelligent control device for water pump |
| CN204099173U (en) * | 2014-09-09 | 2015-01-14 | 甘泉 | A kind of water pump controller |
| CN107067686A (en) * | 2016-12-06 | 2017-08-18 | 永嘉上江泵业制造有限公司 | Intelligent water pump radio network control apparatus |
| CN106933144A (en) * | 2017-03-09 | 2017-07-07 | 安徽理工大学 | A kind of cloud computing and the network integration of the wisdom potted landscape based on wireless sensor network |
-
2017
- 2017-10-30 CN CN201711032084.7A patent/CN107741713A/en active Pending
- 2017-11-10 WO PCT/CN2017/110591 patent/WO2019085002A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110278224A (en) * | 2018-03-15 | 2019-09-24 | 罗森伯格（上海）通信技术有限公司 | A kind of monitoring system and monitoring method based on NB-IoT |
| CN108549298A (en) * | 2018-06-04 | 2018-09-18 | 惠州良信智能科技有限公司 | A kind of intelligent water pump controller based on LAN |
| CN108661898A (en) * | 2018-06-06 | 2018-10-16 | 惠州良信智能科技有限公司 | A kind of intelligent water pump controller for wisdom agricultural irrigation |
| CN110439794A (en) * | 2019-08-13 | 2019-11-12 | 中铁隧道集团三处有限公司 | A kind of pump machine wireless control system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019085002A1 (en) | 2019-05-09 |
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Inventor after: Weng Shangdi Inventor after: Huang Shengbin Inventor after: Xiao Heng Inventor before: Weng Shangdi Inventor before: Huang Shengbin Inventor before: Tu Tiantian Inventor before: Xiao Heng |
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