CN110687943A - Intelligent greenhouse switching system based on NB-IoT - Google Patents
Intelligent greenhouse switching system based on NB-IoT Download PDFInfo
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- CN110687943A CN110687943A CN201911029611.8A CN201911029611A CN110687943A CN 110687943 A CN110687943 A CN 110687943A CN 201911029611 A CN201911029611 A CN 201911029611A CN 110687943 A CN110687943 A CN 110687943A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
An intelligent greenhouse switching system based on NB-IoT comprises a power supply module, a main control board of an acquisition terminal, a data acquisition module, a communication module, a terminal control module, an NB-IOT base station, a cloud platform database and a user control terminal. The terminal control module comprises a relay module, a communication module A and a control panel. The relay module terminal is connected with each greenhouse temperature control device. The main control board transmits information collected by the sensor to the communication module, the information processed by the control board is transmitted to the communication module, the information is transmitted to the NB-IOT base station through the communication module and is transmitted to the user control end through the cloud platform database, and the user control end makes a decision according to the received information and sends out decision information. The NB-IoT technology is applied to the planting of the greenhouse, so that the timely, flexible and accurate control of the temperature in the greenhouse is realized, and a foundation is laid for improving the crop productivity.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to an intelligent greenhouse switching system based on NB-IoT.
Background
With the development of the technology, the intelligent agriculture is developed, and compared with other traditional modes, the application of the Internet of things to greenhouse detection is greatly improved, but the practical application still has defects. The prior communication technology is generally applied to greenhouses in ZigBee, Bluetooth, wired and other communication modes, and in recent years, LoRa technology is slowly applied to agricultural technology production, but still faces relative limitations.
Although wired communication has the advantages of strong anti-interference performance, high data transmission accuracy, high transmission rate and the like, compared with wireless communication, the wired communication has the defects of high construction cost, limited construction environment, high maintenance cost and the like, and is not suitable for being applied to a greenhouse planting system. ZigBee and Bluetooth belong to an ad hoc network, and are open network technologies. But still has the limitation, has the disadvantages of short transmission distance, large power loss, unstable transmission, etc. The application of the method to a greenhouse planting system can cause the data to be incapable of being transmitted normally, thereby affecting the environmental control of the greenhouse and causing the crops to be incapable of growing normally. Although the LoRa technology overcomes the defects of the traditional Internet of things communication technologies such as ZigBee and Bluetooth and the like and overcomes the defects of short transmission distance, low power loss and the like, the LoRa technology has no related international standard, belongs to an unauthorized Internet of things technology, has an unclear development prospect and can limit the requirements of users.
Disclosure of Invention
The invention aims to provide an NB-IoT-based intelligent greenhouse switching system, which overcomes the defects of the traditional Internet of things communication technology, realizes more accurate control on the temperature of a greenhouse and further improves the yield of the greenhouse.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
an NB-IoT-based intelligent greenhouse switching system comprises a power supply module, a main control board of an acquisition terminal, a data acquisition module, an RS485 circuit module, a communication module, a terminal control module, an NB-IOT base station, a cloud platform database and a user control end;
the terminal control module comprises a relay module, a communication module A and a control panel;
the relay module terminal is connected with each greenhouse temperature control device;
the power module is used for providing power to a main control board of the acquisition terminal, the data acquisition module, the communication module and the terminal control module;
the main control board receives signals collected by the sensors, further processes the signals, transmits the processed information to the communication module, transmits the information processed by the control board to the communication module, transmits the information to the NB-IOT base station through the communication module, and transmits the information to the user control end through the cloud platform database, and the user control end makes a decision according to the received information and sends out decision information;
the user control end sends the decision information to the communication module, and the communication module controls the relay module according to the received decision information of the user control end, so that the temperature control of the temperature greenhouse is realized.
As an optimal technical scheme, the control panel comprises a single chip microcomputer reset circuit and a real-time clock RTC, the main control chip is STM32F103, and information of the data acquisition module is collected for further information processing.
As a preferred technical scheme, the data acquisition module is a DS18B20 sensor.
As a preferred technical scheme, the communication module is BC-95, and further comprises a reset circuit and a SIM circuit.
As a preferred technical scheme, the greenhouse temperature control equipment comprises a fan, a sun shield and a heater.
Compared with the prior art, the invention has the beneficial effects that:
the NB-IoT technology is applied to the planting of the greenhouse, so that the timely, flexible and accurate control of the temperature in the greenhouse is realized, and a foundation is laid for improving the crop productivity.
Drawings
FIG. 1 is a diagram of the overall system architecture;
FIG. 2 is a schematic diagram of a data acquisition module;
FIG. 3 is a schematic diagram of an RS485 module;
fig. 4 is a schematic diagram of a communication module, wherein an upper a is a reset circuit, an upper B is a SIM card module, and a lower B is a radio frequency circuit;
FIG. 5 is a schematic diagram of a relay module;
fig. 6 is a schematic diagram of a power supply circuit.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, an intelligent greenhouse switching system based on NB-IoT includes a power module, a main control board of an acquisition terminal, a data acquisition module, a communication module and a terminal control module. The power module provides power for the main control board of the acquisition terminal, the data acquisition module, the communication module and the terminal control module, and the data acquisition module is used for acquiring greenhouse temperature information and providing the greenhouse temperature information for the user control end so as to facilitate further temperature control. The main control board receives signals collected by the sensors, further processes the signals and transmits the processed information to the communication module. The information processed by the control panel is transmitted to the communication module, transmitted to the NB-IOT base station through the communication module and transmitted to the user control end through the cloud platform database, and the user control end can check the transmitted collected temperature information and further can manually select whether to close a greenhouse control switch or select a temperature threshold value to carry out an automatic mode. And the user control terminal sends the decision information to a control terminal, and the control terminal comprises a relay module, a communication module and a control panel. The communication module receives the decision information of the user control end so as to further control the actuation of the relay, thereby completing the temperature control of the greenhouse. If the temperature exceeds the threshold value, the corresponding relay is closed and opened, if the user control end selects a manual mode, the temperature threshold value is closed, and the corresponding relay suction is completed by receiving the information to be corresponding, so that the temperature control of the temperature greenhouse is completed.
The control panel is composed of a main control chip, a single chip microcomputer reset circuit and a real-time clock RTC. The main control chip adopts STM32F103 to collect data acquisition module information for further information processing.
Fig. 2 shows a temperature greenhouse data acquisition module, a DS18B20 sensor is selected as a digital temperature sensor, the access voltage is 3.3V, the reading temperature is 16 bits, the resolution is 0.0625 ℃, the DQ pin is accessed to a GPIO port of a single chip microcomputer, and the single chip microcomputer is connected with an RS485 circuit.
Fig. 3 shows an RS485 communication module, and the sensor and the main control chip of the data terminal adopt an RS485 bus communication mode. The chip selects SP3485, the access voltage is 3.3V, the indicated RO and DI ends are accessed to the TX and RX ends of the single chip microcomputer, the RE and DE ends are accessed to the GPIO end of the single chip microcomputer, and the A, B ends are output ends of RS 485.
Fig. 4 shows a communication module, wherein the communication chip is BC-95, and further includes a reset circuit and a SIM circuit. And the USIM _ DATA, USIM _ GND, USIM _ RST, USIM _ VDD and USIM _ CLK in the SIM circuit are correspondingly connected to corresponding pins of the BC-95 chip. RXD and TXD in BC-95 are connected with a data receiving and transmitting terminal pin of the singlechip microcomputer. The STM32F103 single chip microcomputer sends an instruction, the information received by the communication module is transmitted to the user control end through the NB-IoT base station, and therefore the information transmitted and collected by the data collector is transmitted to the user control end in a wireless communication mode.
As shown in FIG. 1, the control terminal is composed of a communication module, a control panel and a relay module. The communication module, the control panel and the acquisition terminal are designed in the same way. The communication module receives the instruction of the user control terminal and then sends the instruction to the main control chip, and the main control chip controls the relay to act, so that wireless control is formed.
As shown in fig. 5, one end of the relay module is connected to the optocoupler, which selects 4N25, thereby increasing the interference rejection capability. And a pin 1 of the optical coupler is connected with a GPIO pin of the main control chip, and a pin 4 of the optical coupler is connected with the relay through a triode. The terminal of the relay is connected with equipment such as a fan, a sun shield and a heater. In addition, the voltages of the optocoupler and the relay adopt 12V direct current.
If the indoor temperature of the temperature information received by the control terminal exceeds a threshold value set by the user control end, the main control chip closes the relay of the corresponding control heater, so that the heater is closed, the relay of the corresponding fan and the sun shield is further opened, and the fan and the sun shield are opened to reduce the temperature of the greenhouse. On the contrary, if the temperature is lower than the threshold value set by the user control end, the control fan and the sun shield relay are closed, and the relay for controlling the heater is opened, so that the temperature in the greenhouse is increased. In addition, the control terminal can be provided with a manual mode, the automatic mode is closed after the manual mode is started, and a user can select to close or open the relay for controlling the corresponding motor so as to complete the temperature control of the greenhouse.
Fig. 6 is a schematic diagram of a power supply circuit, in which,
(a)3.3V output voltage
The power supply module outputs voltage through the USB interface, the voltage is converted into stable 3.3 voltage through the LM1117-3.3 chip, and the stable 3.3 voltage is supplied to the DS18B20 sensor, the STM32F103 single chip microcomputer, the sp3485 chip and the BC-95 chip;
(b)12V output voltage
The power supply is converted into 22V direct current voltage from 220V alternating current through a transformer and a rectifier bridge, and the 22V direct current voltage is converted into stable 12V direct current voltage through an LM7812 chip to supply power to the relay module.
Claims (5)
1. An NB-IoT-based intelligent greenhouse switching system is characterized by comprising a power supply module, a main control board of an acquisition terminal, a data acquisition module, a communication module, a terminal control module, an NB-IOT base station, a cloud platform database and a user control end;
the terminal control module comprises a relay module, a communication module A and a control panel;
the relay module terminal is connected with each greenhouse temperature control device;
the power module is used for providing power to a main control board of the acquisition terminal, the data acquisition module, the communication module and the terminal control module;
the main control board receives signals collected by the sensors, further processes the signals, transmits the processed information to the communication module, transmits the information processed by the control board to the communication module, transmits the information to the NB-IOT base station through the communication module, and transmits the information to the user control end through the cloud platform database, and the user control end makes a decision according to the received information and sends out decision information;
the user control end sends the decision information to the communication module, and the communication module controls the relay module according to the received decision information of the user control end, so that the temperature control of the temperature greenhouse is realized.
2. The NB-IoT-based intelligent greenhouse switching system according to claim 1, wherein the control board comprises a single chip microcomputer reset circuit and a real-time clock RTC, the main control chip is STM32F103, and the collected data acquisition module information is further processed.
3. The NB-IoT based intelligent greenhouse switching system according to claim 1, wherein the data collection module is a DS18B20 sensor.
4. The NB-IoT based intelligent greenhouse switching system according to claim 1, wherein the communication module is BC-95, further comprising a reset circuit and a SIM circuit.
5. The NB-IoT based intelligent greenhouse switching system of claim 1, wherein the greenhouse temperature control devices comprise fans, sun visors and heaters.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114531456A (en) * | 2020-11-04 | 2022-05-24 | 中国科学院沈阳自动化研究所 | Low-power-consumption industrial monitoring system based on NB-IoT and WSN heterogeneous |
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| CN105284490A (en) * | 2015-11-24 | 2016-02-03 | 上海应用技术学院 | Greenhouse control system based on mobile intelligent terminal |
| CN107153383A (en) * | 2017-06-21 | 2017-09-12 | 江苏师范大学 | A kind of intelligent Greenhouse monitoring system based on NB IOT |
| CN206573960U (en) * | 2016-12-23 | 2017-10-20 | 西京学院 | A kind of agriculture intelligent Greenhouse monitoring system based on Internet of Things |
| CN109976421A (en) * | 2019-03-27 | 2019-07-05 | 甘超宇 | A kind of intelligent Greenhouse control system and application method |
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- 2019-10-28 CN CN201911029611.8A patent/CN110687943A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105284490A (en) * | 2015-11-24 | 2016-02-03 | 上海应用技术学院 | Greenhouse control system based on mobile intelligent terminal |
| CN206573960U (en) * | 2016-12-23 | 2017-10-20 | 西京学院 | A kind of agriculture intelligent Greenhouse monitoring system based on Internet of Things |
| CN107153383A (en) * | 2017-06-21 | 2017-09-12 | 江苏师范大学 | A kind of intelligent Greenhouse monitoring system based on NB IOT |
| CN109976421A (en) * | 2019-03-27 | 2019-07-05 | 甘超宇 | A kind of intelligent Greenhouse control system and application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114531456A (en) * | 2020-11-04 | 2022-05-24 | 中国科学院沈阳自动化研究所 | Low-power-consumption industrial monitoring system based on NB-IoT and WSN heterogeneous |
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