CN114509116A - STM32 and NB-IoT-based low-power-consumption agricultural monitoring system - Google Patents
STM32 and NB-IoT-based low-power-consumption agricultural monitoring system Download PDFInfo
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- G—PHYSICS
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Abstract
An STM32 and NB-IoT based low-power agricultural monitoring system comprises the following specific steps: starting; initializing a system; initializing a module; simultaneously, environmental data acquisition, threshold value issuing monitoring and threshold value monitoring are carried out; and (6) ending. The invention has the beneficial effects that: STM32 is used as a core, a wireless sensor network is established by utilizing the narrow-band Internet of things technology to collect and monitor the temperature, the humidity, the atmospheric pressure, the illumination intensity and the harmful gas index in the crop growth environment in real time, meanwhile, data information collected by the wireless sensor network is packed and sent to a server through sockets, a corresponding chart is displayed on the server deployment website and remote control of a threshold value is carried out, a long-distance, low-power consumption, intellectualization, multi-dimension and multi-scale crop information real-time monitoring system is realized, and a user can monitor and regulate the environment where crops are located through various direct-viewing modes of character, curve and picture information of a webpage-end intelligent monitoring interface.
Description
Technical Field
The invention relates to the technical field of agricultural monitoring, in particular to a low-power-consumption agricultural monitoring system based on STM32 and NB-IoT.
Background
Informatization and precision are new requirements of agricultural development in a new period, and development of computer technology provides technical support for intelligent application in the aspect of agriculture. In the aspects of enhancing agricultural production management and problem decision, how to accurately, real-timely and efficiently acquire various important information of crops in the planting and growing processes is important, and one of important methods for acquiring crop growth environment information is to acquire and monitor farmland data.
Therefore, in recent years, the development of agriculture, particularly greenhouse agriculture, increasingly pays attention to the collection and monitoring of the growth environment information of crops, the growth environment of the crops is adjusted in time according to the growth conditions of the crops, the change of the growth conditions of the crops after the environment changes is detected, and more scientific macroscopic regulation and control can be performed. However, unlike the greenhouse environment, the general farmland environment generally has the characteristics of remote geographical location, wide area, difficult adjustment of communication equipment and the like. In most cases, the acquisition of crop growth environment data information is increasingly difficult, and moreover, the farmland has a severe environment, and a long life cycle of a general sensor is difficult to achieve after the sensor is placed in the farmland.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a low-power-consumption agricultural monitoring system based on STM32 and NB-IoT, which takes STM32 as a core, utilizes a narrow-band Internet of things technology to build a wireless sensor network to collect and monitor the temperature, humidity, atmospheric pressure, illumination intensity and harmful gas index in the crop growth environment in real time, simultaneously packages and sends data information collected by the wireless sensor network to a server through sockets, deploys a website on the server to display a corresponding chart and remotely control the threshold value, so that the long-distance, low-power-consumption, intelligent, multi-dimensional and multi-scale crop information real-time monitoring system is realized, a user can monitor and regulate the environment where crops are located through various intuitive modes of character, curve and picture information of a webpage-end intelligent monitoring interface, and the system can remarkably reduce maintenance cost, Simplifying the operation difficulty and improving the economic benefit.
In order to achieve the purpose, the invention adopts the following technical scheme: an STM32 and NB-IoT based low-power agricultural monitoring system comprises the following specific steps: starting; initializing a system; initializing a module; simultaneously, environmental data acquisition, threshold value issuing monitoring and threshold value monitoring are carried out; and (6) ending.
Further, the environmental data acquisition specifically comprises the following steps: collecting environmental data; processing and encoding data; uploading data to a server; and displaying the webpage.
Further, the specific steps of threshold value issuing monitoring are as follows: threshold value issuing monitoring; detecting whether the issuing is successful; if the issuing is not successful, detecting; and if the issuing is successful, updating the threshold value.
Further, the threshold monitoring specifically comprises the following steps: monitoring a threshold value; detecting whether the threshold value exceeds the limit; if not, continuing to monitor the threshold value; and if the threshold value exceeds the limit, the buzzer alarms and reminds.
Further, the environmental data acquisition respectively uses a DHT11 temperature and humidity sensor, a BMP180 atmospheric pressure sensor, a BH1750 illumination intensity sensor and an MQ2 broad-spectrum gas sensor.
Furthermore, network attachment is performed through the NB-IoT module, when the environmental data is acquired for 60 times, the main control chip encodes the data to be uploaded, the communication module receives the data uploading signal, and at the moment, the module can establish a socket to be connected with the server, so that a data reporting function is realized.
Further, the threshold monitoring time is 500 ms.
The working principle of the invention is as follows: data acquisition is carried out through a DHT11 temperature and humidity sensor, a BMP180 atmospheric pressure sensor, a BH1750 illumination intensity sensor and an MQ2 broad-spectrum gas sensor, the principle of temperature and humidity acquisition is realized, the DHT11 temperature and humidity sensor is good in stability and reliability and widely applied to the related monitoring field of emerging Internet of things, the DHT11 internally contains a temperature and humidity calibration coefficient, calibration can be automatically carried out in the process of acquiring temperature and humidity data, therefore, the test result has extremely high accuracy, the temperature and humidity measuring module of the temperature and humidity measuring device is composed of a humidity sensitive resistance element and an NTC type resistor, the response is fast, the DHT11 digital temperature and humidity sensor is provided with a single-wire serial interface, the special single-row 4-pin is convenient to connect with various types of single-chip microcomputers, the whole sensor is easy to integrate, the power consumption is extremely low, the signal transmission distance range is extremely stable within 0-20 meters, and the sensor is suitable for long-time indoor and outdoor temperature and humidity monitoring; the atmospheric pressure monitoring implementation principle adopts a BH1750 atmospheric pressure sensor which is a high-precision, small-volume and ultralow-energy-consumption pressure digital atmospheric pressure sensor, the BMP180 is adopted in the design, the sensor is suitable for intelligent high-precision measurement and data acquisition, high-precision pressure (or height) and temperature measurement data are output, the absolute precision can reach 0.03hPa at the lowest, the power consumption is extremely low, only 3 muA exists, and meanwhile, an interface of an IIC bus is arranged, so that a single chip microcomputer can conveniently access the sensor; the illumination intensity acquisition implementation principle adopts a BMP180 illumination intensity sensor which is a digital light intensity sensor integrated circuit used for a two-wire serial bus interface, the integrated circuit can adjust the brightness of a liquid crystal or keyboard background according to collected light intensity data, the high resolution of the integrated circuit can be used for detecting the light intensity change in a large range, the illumination intensity range measured by the sensor is 0-65535 lux, the minimum error variation is +/-20%, and the resolution is 1 lux; the broad-spectrum gas sensor detects gas by utilizing physical property changes such as conductivity and the like generated when the gas to be detected is contacted with the surface of a semiconductor, the change generated when the semiconductor and the gas interact is only limited on the surface of the semiconductor or extends into the semiconductor, and the gas adsorbed on the surface of the semiconductor and the semiconductor generate electron acceptance, so that the physical properties such as the conductivity and the like of the semiconductor are changed, but the internal chemical composition is not changed; the method comprises the steps that a semiconductor reacts with gas to change the internal composition of the semiconductor and change the conductivity, when a sensitive material is in contact with the gas, the resistance value of the sensitive material is changed to detect the components or the concentration of the gas, certain relation characteristics of the gas are changed according to the adsorption and the reaction of the gas, the gas is directly or indirectly detected, and the principle of Narrow-Band Internet of Things communication is realized The high-efficiency connection of equipment with higher network connection requirements has the characteristics of supporting mass connection, wide coverage, low power consumption, low cost and the like, is a breakthrough technology for realizing the interconnection of everything, can be connected with a main control chip through a serial port and is controlled through an AT instruction; the LED is a light emitting diode made by the injection type electroluminescence principle, is called LED, when it is in the forward working state (i.e. the forward voltage is added at two ends), the current flows from the LED anode to the cathode, the semiconductor crystal can emit light rays with different colors from ultraviolet to infrared, the intensity of the light is related to the current, the buzzer is composed of permanent magnet, coil and oscillating piece, the sounding process is: an external part provides and drives an oscillation signal (a square wave with a certain duty ratio, the signal acts on a coil, and the generated magnetic sound and the permanent magnet act together to make a metal sheet (oscillation sheet) vibrate, so that sound is produced.
After the technical scheme is adopted, the invention has the beneficial effects that: STM32 is used as a core, a wireless sensor network is established by utilizing the narrow-band Internet of things technology to collect and monitor the temperature, the humidity, the atmospheric pressure, the illumination intensity and the harmful gas index in the crop growth environment in real time, meanwhile, data information collected by the wireless sensor network is packed and sent to a server through sockets, and a corresponding chart is displayed on the server deployment website and is subjected to threshold value remote control, so that the long-distance, low-power consumption, intellectualization, multi-dimension and multi-scale crop information real-time monitoring system is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
Referring to fig. 1, the technical solution adopted by the present embodiment is: the method comprises the following specific steps: starting; initializing a system; initializing a module; simultaneously, environmental data acquisition, threshold value issuing monitoring and threshold value monitoring are carried out; and finishing, wherein the environmental data acquisition comprises the following specific steps: collecting environmental data; data processing and encoding; uploading data to a server; the webpage display, the threshold value issue monitoring specific steps are: threshold value issuing monitoring; detecting whether the issuing is successful; if the issuing is not successful, detecting; if the issuing is successful, updating the threshold, wherein the threshold monitoring comprises the following specific steps: monitoring a threshold value; detecting whether the threshold value exceeds the limit; if not, continuing to monitor the threshold value; if the threshold value exceeds the limit, a buzzer alarms to remind, the environmental data are collected through an NB-IoT module by using a DHT11 temperature and humidity sensor, a BMP180 atmospheric pressure sensor, a BH1750 illumination intensity sensor and an MQ2 broad-spectrum gas sensor respectively, network attachment is carried out, when the environmental data are collected for 60 times, a main control chip encodes data to be uploaded, a communication module receives a data uploading signal, the module can establish a socket to be connected with a server, the data reporting function is achieved, and the threshold value monitoring time is 500 ms.
The working principle of the invention is as follows: data acquisition is carried out through a DHT11 temperature and humidity sensor, a BMP180 atmospheric pressure sensor, a BH1750 illumination intensity sensor and an MQ2 broad-spectrum gas sensor, the principle of temperature and humidity acquisition is realized, the DHT11 temperature and humidity sensor is good in stability and reliability and widely applied to the related monitoring field of emerging Internet of things, the DHT11 internally contains a temperature and humidity calibration coefficient, calibration can be automatically carried out in the process of acquiring temperature and humidity data, therefore, the test result has extremely high accuracy, the temperature and humidity measuring module of the temperature and humidity measuring device is composed of a humidity sensitive resistance element and an NTC type resistor, the response is fast, the DHT11 digital temperature and humidity sensor is provided with a single-wire serial interface, the special single-row 4-pin is convenient to connect with various single-chip microcomputers, the whole sensor is easy to integrate, the power consumption is extremely low, the signal transmission distance range is extremely stable within 0-20 m, and the temperature and humidity monitoring device is suitable for long-time indoor and outdoor temperature and humidity monitoring; the atmospheric pressure monitoring implementation principle adopts a BH1750 atmospheric pressure sensor which is a high-precision, small-volume and ultralow-energy-consumption pressure digital atmospheric pressure sensor, the BMP180 is adopted in the design, the sensor is suitable for intelligent high-precision measurement and data acquisition, high-precision pressure (or height) and temperature measurement data are output, the absolute precision can reach 0.03hPa at the lowest, the power consumption is extremely low, only 3 muA exists, and meanwhile, an interface of an IIC bus is arranged, so that a single chip microcomputer can conveniently access the sensor; the illumination intensity acquisition implementation principle adopts a BMP180 illumination intensity sensor which is a digital light intensity sensor integrated circuit used for a two-wire serial bus interface, the integrated circuit can adjust the brightness of a liquid crystal or keyboard background according to collected light intensity data, the high resolution of the integrated circuit can be used for detecting the light intensity change in a large range, the illumination intensity range measured by the sensor is 0-65535 lux, the minimum error variation is +/-20%, and the resolution is 1 lux; the broad-spectrum gas sensor detects gas by utilizing physical property changes such as conductivity and the like generated when the gas to be detected is contacted with the surface of a semiconductor, the change generated when the semiconductor and the gas interact is only limited on the surface of the semiconductor or extends into the semiconductor, and the gas adsorbed on the surface of the semiconductor and the semiconductor generate electron acceptance, so that the physical properties such as the conductivity and the like of the semiconductor are changed, but the internal chemical composition is not changed; the method comprises the steps that a semiconductor reacts with gas to change the internal composition of the semiconductor and change the conductivity, when a sensitive material is in contact with the gas, the resistance value of the sensitive material is changed to detect the components or the concentration of the gas, certain relation characteristics of the gas are changed according to the adsorption and the reaction of the gas, the gas is directly or indirectly detected, and the principle of Narrow-Band Internet of Things communication is realized The high-efficiency connection of equipment with higher network connection requirements has the characteristics of supporting mass connection, wide coverage, low power consumption, low cost and the like, is a breakthrough technology for realizing the interconnection of everything, can be connected with a main control chip through a serial port and is controlled through an AT instruction; the LED is a light emitting diode made by the injection type electroluminescence principle, is called LED, when it is in the forward working state (i.e. the forward voltage is added at two ends), the current flows from the LED anode to the cathode, the semiconductor crystal can emit light rays with different colors from ultraviolet to infrared, the intensity of the light is related to the current, the buzzer is composed of permanent magnet, coil and oscillating piece, the sounding process is: an external part provides and drives an oscillation signal (a square wave with a certain duty ratio, the signal acts on a coil, and the generated magnetic sound and the permanent magnet act together to make a metal sheet (oscillation sheet) vibrate, so that sound is produced.
After the technical scheme is adopted, the invention has the beneficial effects that: STM32 is used as a core, a wireless sensor network is established by utilizing the narrow-band Internet of things technology to collect and monitor the temperature, the humidity, the atmospheric pressure, the illumination intensity and the harmful gas index in the crop growth environment in real time, meanwhile, data information collected by the wireless sensor network is packed and sent to a server through sockets, and a corresponding chart is displayed on the server deployment website and is subjected to threshold value remote control, so that the long-distance, low-power consumption, intellectualization, multi-dimension and multi-scale crop information real-time monitoring system is realized.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A low-power consumption agricultural monitoring system based on STM32 and NB-IoT is characterized in that: the method comprises the following specific steps:
1) starting;
2) initializing a system;
3) initializing a module;
4) simultaneously, environmental data acquisition, threshold value issuing monitoring and threshold value monitoring are carried out;
5) and (6) ending.
2. An STM32 and NB-IoT based low power consumption agricultural monitoring system according to claim 1, characterized in that: the environmental data acquisition in the step 4 comprises the following specific steps:
1) collecting environmental data;
2) processing and encoding data;
3) uploading data to a server;
4) and displaying the webpage.
3. An STM32 and NB-IoT based low power consumption agricultural monitoring system according to claim 1, characterized in that: the specific steps of the valve value issuing monitoring in the step 4 are as follows:
1) threshold value issuing monitoring;
2) detecting whether the issuing is successful;
3) if the issuing is not successful, detecting;
4) and if the issuing is successful, updating the threshold value.
4. An STM32 and NB-IoT based low power consumption agricultural monitoring system according to claim 1, characterized in that: the valve value monitoring in the step 4 comprises the following specific steps:
1) monitoring a threshold value;
2) detecting whether the threshold value exceeds the limit;
3) if not, continuing to monitor the threshold value;
4) and if the threshold value exceeds the limit, the buzzer alarms and reminds.
5. An STM32 and NB-IoT based low power consumption agricultural monitoring system according to claim 1, characterized in that: in the step 4, a DHT11 temperature and humidity sensor, a BMP180 atmospheric pressure sensor, a BH1750 illumination intensity sensor and an MQ2 broad-spectrum gas sensor are respectively used for environmental data acquisition.
6. An STM32 and NB-IoT based low power consumption agricultural monitoring system according to claim 2, characterized in that: the NB-IoT module is used for network attachment, when the environmental data are collected for 60 times, the main control chip encodes the data to be uploaded, the communication module receives the data uploading signal, and the module can establish a socket to be connected with the server to realize the data reporting function.
7. A low-power agricultural monitoring system based on STM32 and NB-IoT according to claim 4, characterized in that: the threshold monitoring time is 500 ms.
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2022
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Application publication date: 20220517 |