CN111654834B - Wireless acquisition device and method for SDI12 sensor data based on NB-IoT - Google Patents

Wireless acquisition device and method for SDI12 sensor data based on NB-IoT Download PDF

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Publication number
CN111654834B
CN111654834B CN202010497340.5A CN202010497340A CN111654834B CN 111654834 B CN111654834 B CN 111654834B CN 202010497340 A CN202010497340 A CN 202010497340A CN 111654834 B CN111654834 B CN 111654834B
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module
data
iot
sensor
sdi12
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CN111654834A (en
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刘大铭
沈晖
田军仓
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Ningxia University
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Ningxia University
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/38Services specially adapted for particular environments, situations or purposes for collecting sensor information
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00Electric signal transmission systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses an NB-IoT-based SDI12 sensor data wireless acquisition device and system, wherein a power supply module is used for providing power supply input for a main control module and each sub-module; the data sensing module is directly connected with the signal conditioning module and is used for collecting six sensing data of field soil temperature and humidity, air temperature and humidity, soil conductivity and soil oxygen content; the signal conditioning module is connected with the data sensing module; the Arduino expansion board module is used as a main controller to be connected with the signal conditioning module, and the Arduino is communicated with the sensor through the SDI interface module; the SDI interface module is connected with the main control module, the SDI interface module is SDI12 communication protocol, and the SDI12 data recorder communicates with the sensor by uploading ASCII codes on a data line; the NB-IoT module is connected with the main control module, comprises an NB-IoT chip and is used for wireless data transmission communication of the data acquisition device.

Description

Wireless acquisition device and method for SDI12 sensor data based on NB-IoT
Technical field:
the invention relates to the technical field of intelligent farmland irrigation, in particular to an NB-IoT-based SDI12 sensor data wireless acquisition device, system and method.
The background technology is as follows:
the internet of things refers to a network concept that various information sensing devices communicate any device with the internet through internet of things domain names so as to realize intelligent identification, positioning, tracking, monitoring and management. The internet of things can comprehensively sense object information through technologies such as radio frequency identification, sensors, two-dimensional codes, GPS satellite positioning and the like, realize information distribution and sharing through short-distance communication modes such as Bluetooth and Zigbee and long-distance communication modes of a mobile communication network, and realize decision making and intelligent control through analyzing and processing collected object information. The short-distance communication mode has low power consumption and low cost, but the transmission distance is short, so that a plurality of complex network topologies consisting of a plurality of relay nodes are needed during long-distance transmission, and the stability is poor; the long-distance communication mode has wide communication coverage, high transmission efficiency and large energy consumption on equipment, and is not suitable for being used as the technology of the bottom Internet of things. The internet of things is oriented to a network of things and people and things, comprises a plurality of sensing units such as a sensor, an RFID and the like, and supports a plurality of network communication modes; the sensor network focuses on the terminal connection between objects, focuses on the perception and collection of physical world information and the distribution and convergence efficiency of the network, focuses on the low speed and high efficiency, and has low power consumption and low consumption.
NB-IoT is a narrow-band IoT technology based on an LTE cellular mobile network, and has the characteristics of wide coverage, multiple connections, low speed, low cost, low power consumption, excellent architecture, large capacity and the like, and is widely applied to the fields of low-power consumption wide area networks such as intelligent manufacturing, intelligent agriculture, intelligent transportation and the like. The sensor is used as a detection device, senses the measured information and then converts the measured information into an electric signal or other information output in a required form according to a certain rule, and the requirements of information transmission, processing, storage, display, control and the like can be met. The existing sensor generally adopts a wired connection mode and can only meet single-type acquisition, unified analysis and processing can not be carried out on various sensor data, the cost for acquiring the data is high, and the requirement for monitoring the data in real time can not be met.
The SDI12 is a standard of a data recorder of a microprocessor-based sensor interface, and the SDI12 standard provides a baud rate of 1200 bits for a data string interface. The SDI12 can be applied to a low-power-consumption and low-cost system and a system with a distance between a sensor and a data recorder of 60.96 meters. The data recorder interface can be suitable for various sensors, and the sensor interface can also be suitable for various data recorders. Power is supplied to the sensor through the interface and the sensor can be replaced without requiring verification of the data logger or reprogramming of other information.
The invention comprises the following steps:
in view of the foregoing, it is desirable to provide an NB-IoT based SDI12 sensor data wireless acquisition device, system and method.
An SDI12 sensor data wireless acquisition device based on NB-IoT comprises a shell, a circuit board, a data sensing module, a main control module, an NB-IoT module, an Arduino expansion board module, a signal conditioning module, an SDI interface module and a power supply module; the data sensing module, the main control module, the NB-IoT module, the Arduino expansion board module, the signal conditioning module, the SDI interface module and the power supply module are assembled on the circuit board and are positioned in the shell, and the main control module is installed inside the shell; the power module is used for providing direct current power input for the main control module and each sub-module; the data sensing module is connected with the signal conditioning module and is used for collecting six sensing data of field soil temperature and humidity, air temperature and humidity, soil conductivity and soil oxygen content; the signal conditioning module is connected with the data sensing module, and filters the digital signals acquired and converted by the data sensing module; the Arduino expansion board module is used as a master controller to be connected with the signal conditioning module, a Modbus-RTU protocol is adopted inside the Arduino expansion board module to send the filtered digital signals to a Modbus, and the Arduino expansion board module is communicated with the sensor through the SDI interface module; the SDI interface module is connected with the main control module, namely an SDI12 communication protocol is established, and the SDI12 data recorder communicates with the sensor by uploading ASCII codes on a data line; the NB-IoT module is connected with the main control module, and comprises an NB-IoT chip for wireless data transmission communication of the data acquisition device.
Preferably, the data sensing module comprises a soil temperature and humidity sensor, an air temperature and humidity sensor, a soil conductivity sensor and a soil oxygen sensor, and the soil temperature and humidity sensor, the air temperature and humidity sensor, the soil conductivity sensor and the soil oxygen sensor are respectively connected with the signal conditioning module. The data sensing module is responsible for acquiring sensing data of a data source and converting the acquired analog signals into digital signals. Different soil temperature and humidity sensors, air temperature and humidity sensors, soil conductivity sensors and soil oxygen sensors can be adopted in different application occasions.
Preferably, the NB-IoT modules include connection hub J1, connection hub J1-2, connection hub J2-2, connection hub J3-2, connection hub J4-2, and MS3616 wireless communication modules, the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2 are connected to the main control module, and the MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2; the NB-IoT module adopts an MS3616 wireless communication module, and the ME3616 wireless communication module is designed for low-speed, low-power consumption, scale-through distance and mass connected internet of things application and supports various network protocols. The ME3616 wireless communication module is a mobile communication network module based on NB-IoT communication standards, which adopts LCC encapsulation. In NB-IoT systems, the module may provide a maximum 66Kbps upstream rate and a 34Kbps downstream rate.
Preferably, the signal conditioning module adopts a filter circuit to filter the digital signals acquired and converted by the sensor, and screens out the required data.
Preferably, the Arduino expansion board module uses Arduino/Genuino Uno as an expansion board, communicates with the sensor through SDI12 protocol, collects sensor data and classifies the sensor data, and sends the collected data to a Modbus bus by using Modbus-RTU protocol.
Preferably, the wireless SDI12 sensor data acquisition device based on NB-IoT further comprises a display module and a key module, wherein the key module is connected with the main control module and used for displaying parameter display interface switching, and the key module is partly used as a touch pad to realize SI key; the display module is connected with the main control module, adopts an SPI liquid crystal screen and is used for displaying signal values, operation menus and setting interfaces of the data sensing module.
The wireless SDI12 sensor data acquisition system based on the NB-IoT comprises the wireless SDI12 sensor data acquisition device based on the NB-IoT, an application scene data source, an NB-IoT base station, a cloud server and a client, wherein the application scene data source is connected with the data acquisition device, and the data acquisition device acquires data source data; the data acquisition device establishes connection with the NB-IoT base station, and the NB-IoT base station and the data acquisition device conduct information transfer through a mobile communication center; the NBI-oT base station establishes a connection relationship with a cloud server through an NB-IoT network; the cloud server is connected with the client through a wireless network.
Preferably, the cloud server comprises a database storage module, a data analysis module and a data operation module, wherein the database storage module is connected with the data analysis module, the data analysis module is connected with the data operation module, the database storage module is used for storing various data, the data analysis module is used for counting data sources and analyzing whether the data meet requirements or not, the data operation module is used for receiving and transmitting the data meeting the requirements, and feeding back the data not meeting the requirements.
Preferably, the client adopts a computer or a mobile phone, the computer runs a cloud server browser connected to the data acquisition system, and the mobile phone has a corresponding application program.
Preferably, the application scene data source is used for data acquisition occasions, including a soil temperature and humidity acquisition occasion, an air temperature and humidity acquisition occasion, a soil conductivity acquisition occasion and a soil oxygen acquisition occasion.
The wireless acquisition method of the SDI12 sensor data based on the NB-IoT adopts the data acquisition device, and through the data acquisition system, the steps of the data acquisition method are as follows:
acquiring data, arranging a data acquisition device in an application occasion, and acquiring an analog signal of the application occasion by a data sensing module;
the method comprises the steps of signal processing, namely a data sensing module converts an acquired analog signal into a digital signal and uploads the digital signal to a signal conditioning module, the signal conditioning module filters the digital signal, an Arduino expansion board module and the digital sensing module mutually send ASCII code communication by adopting an SDI12 protocol, and the Arduino expansion board sends the data to a Modbus bus and uploads the digital signal to a main control module;
performing NB-IoT operations, transmitting digital signals to a cloud server via the NB-IoT base station and the NB-IoT network using the NB-IoT module;
the cloud server data processing is carried out, the data analysis module carries out statistics and analysis on the data in the database storage module, and the data operation module judges whether the data meets the requirements;
and the data is displayed, and the data operation module sends the judging result to the corresponding client.
The invention has the following advantages: by adopting the wireless acquisition method of the SDI sensor data based on the NB-IoT, different sensor data in different complex occasions can be counted and analyzed in an integrated mode, operators can monitor the data of each sensor device in real time, remote transmission can be achieved, and environmental requirements can be judged conveniently. The sensor has an A/D interface and an SDI interface, and an SDI12 communication protocol is adopted without an A/D conversion circuit, so that the circuit is simpler, the power consumption and the cost are also reduced, and the controller and the sensor are directly communicated through ASCII codes, so that the system connection is more convenient. The integration of data acquisition and management is realized, and the acquisition device and the system price are more civilian due to low power consumption and low cost.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a wireless acquisition device module connection structure for NB-IoT based SDI12 sensor data;
FIG. 2 is a schematic circuit diagram of a main control module of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 3 is a schematic circuit diagram of a signal conditioning module of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 4 is an Arduino expansion board module circuit schematic diagram of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 5 is a schematic diagram of an NB-IoT module circuit of a NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 6 is a schematic diagram of an SDI interface module circuit of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 7 is a display module circuit schematic diagram of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 8 is a key module circuit schematic diagram of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 9 is a power module circuit schematic diagram of an NB-IoT based SDI12 sensor data wireless acquisition device;
FIG. 10 is a schematic diagram of a wireless acquisition system of NB-IoT based SDI12 sensor data;
fig. 11 is a flowchart of an NB-IoT based SDI12 sensor data wireless acquisition device and system acquisition method.
In the figure: the system comprises a main control module 1, a power supply module 2, a data sensing module 3, a signal conditioning module 4, an Arduino expansion board module 5, an SDI interface module 6, an NB-IoT module 7, a display module 8, a key module 9, an application scene data source 10, a data acquisition device 11, an NB-IoT base station 12, an NB-IoT network 13, a cloud server 14, a database storage module 15, a data analysis module 16, a data operation module 17 and a client 18.
The specific embodiment is as follows:
for the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The present invention provides the following specific examples.
As shown in fig. 1, an SDI12 sensor data wireless acquisition device based on NB-IoT comprises a housing, a housing internal circuit board and a circuit, a data sensing module 3, a main control module 1, an NB-IoT module 7, an Arduino expansion board module 5, a signal conditioning module 4, an SDI interface module 6, a power supply module 2, a display module 8, and a key module 9; the main control module 1 is arranged inside the shell; the power module 2 is used for providing 5V direct current power input for the main control module 1 and each sub-module; the data sensing module 3 is directly connected with the signal conditioning module 4, and the data sensing module 3 is used for collecting six sensing data of field soil temperature and humidity, air temperature and humidity, soil conductivity and soil oxygen content; the signal conditioning module 4 is connected with the data sensing module 3, drives the data sensing module 3, filters the acquired and converted digital signals, and uploads the filtered digital signals to the Arduino expansion board module 5; the Arduino expansion board module 5 is connected with the signal conditioning module 4, the Arduino expansion board module 5 is connected with the SDI interface module 6, the Arduino expansion board module 5 and the sensor communicate through an SDI12 protocol, sensor data are collected and classified, and the Modbus-RTU protocol is adopted to send the collected data to a Modbus bus; the SDI interface module 6 is connected with the main control module 1, and the SDI interface module 6 adopts an SDI12 interface as a sensor data interface; the NB-IoT module 7 is connected with the main control module 1, and the NB-IoT module 7 comprises an NB-IoT chip and is used for wireless data transmission communication of the data acquisition device.
Referring to fig. 2, IN one embodiment of an SDI12 sensor data wireless acquisition device and system based on NB-IoT, a master control module includes a master control circuit board, a master control chip STM32F407, a FLASH memory MU2, a first voltage regulator U1 and a second voltage regulator U2, the first voltage regulator U1 is connected with a voltage input end and a P-VCC5V power supply, an EN pin is connected with a first resistor PR1, the first resistor PR1 is connected with a PTC4 end, a CT pin is connected with a first capacitor PC1, the first capacitor PC1 is connected with a VIN end, a pin QOD is connected with a variable resistor PR3, a pin IN of the second voltage regulator U2 is connected with a grounding wire after being connected with a pin GND and a second capacitor PC2, a pin EN is connected with VCC5V, a pin NC is connected with a capacitor PC5, and a pin OUT is connected with VCC3.3V, and is connected with a capacitor PC 3; the pin VCC of the FLASH memory MU2 is connected with the HOLD and VCC3.3V and connected with the capacitor MC 1; the master control chip STM32F407 of the master control module has high running frequency of the core Cortex-M0, reserves 485 wired communication interfaces, integrates FLASH, SRAM, SPI and other functions, supports the chips FLASH, SRAM, PSRAM, NOR and NAND FLASH, has strong functions but extremely low power consumption, and can flexibly select a communication mode by a user.
Referring to fig. 3, in one embodiment of an SDI12 sensor data wireless acquisition device and system based on NB-IoT, a schematic circuit diagram of a signal conditioning module includes a filter circuit, where the filter circuit includes a voltage limiting circuit D11, a resistor R12, a resistor R11, a resistor R13, a capacitor C11, and a diode D12, an AO end of a main control chip STM32F407 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to the voltage limiting circuit D11, the resistor R13, the capacitor C11, and the resistor R11, the resistor R11 is connected to the diode D12, the resistor R13 and the capacitor C11 are connected to a grounding wire GND, and the filter circuit is designed to reduce ac components in pulsating dc voltage, retain dc components thereof, reduce ripple coefficients of output voltage, and make waveforms smoother. A0 is connected with a 5V power supply, resistors R12 and R11 are used for performing current limiting protection, D11 is a voltage limiting circuit formed by four voltage stabilizing diodes, a capacitor C11 and a resistor R13 form a filter circuit, and D12 forms a lightning protection circuit.
Referring to fig. 4, in one embodiment of an NB-IoT based SDI12 sensor data wireless acquisition device and system, an Arduino expansion module is related to a circuit schematic, where the Arduino expansion module includes logic gate operation chips sn74ahclg04, MAX485 chip, resistor RS1, resistor RS2, capacitor CS1, resistor RS3, resistor RS4, resistor RS5, voltage limiting circuit DS1, an overcurrent protector LP-MSM-010 and 485 chip, pin Y of the logic gate operation chip sn74ahclg04 is connected with pin RE and pin DE of the MAX485 chip, pin DI of the MAX485 chip is connected with DI/TX end and with resistor RS2, resistor RS2 is connected with VCC5V, pin RO of the MAX485 chip is connected with resistor RS1 and with DO/RX end, pin B of the logic gate operation chip sn74ahclg04 is connected with DI/MAX end, pin of MAX485 chip is connected with capacitor CS1 and with VCC5V, pin B of the MAX 5V is connected with VCC chip and the overcurrent protector LP-010 and the resistor m-485 chip, and pin DE is connected with the resistor m-010 and the resistor m-010 chip, and the resistor is connected with the resistor m-010 and the resistor 010 is connected with the resistor m-485 chip; the Arduino expansion module adopts Arduino/Genuino Uno, is connected with the main control board through DI/TX and DO/RX, takes the RS485 interface as a networking interface, and can monitor data of the sensor acquired by the Arduino expansion module through the 485 interface. The half-duplex network formed by the RS485 interface is generally in a two-wire system, and shielded twisted pair transmission is adopted. The connection mode is that the bus topology structure can be connected with 32 nodes at most on the same bus. In the RS485 communication network, a master-slave communication mode is generally adopted, that is, one host computer is provided with a plurality of slaves. In many cases, a twisted pair of wires is used to connect the "a" and "B" ends of each interface when connecting the RS485 communication link. The RS485 interface connector adopts a 9-core plug seat of DB-9, a DB-9 hole is adopted for the RS485 interface of the intelligent terminal, and a DB-9 needle is adopted for the RS485 interface connected with a keyboard.
Referring to fig. 5, in one embodiment of a NB-IoT based SDI12 sensor data wireless acquisition device and system, the NB-IoT module circuit schematic diagram includes connection socket J1, connection socket J1-2, connection socket J2-2, connection socket J3-2, connection socket J4-2 and MS3616 wireless communication modules, the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2 are connected to the main control module, and the MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2. The NB-IoT module adopts an MS3616 wireless communication module, and the ME3616 is designed for low-speed, low-power consumption, through-the-distance and mass connected internet of things applications, so as to support various network protocols. ME3616 is a mobile communications network module based on NB-IoT communications standards employing LCC encapsulation. In NB-IoT systems, the module may provide a maximum 66Kbps upstream rate and a 34Kbps downstream rate.
Referring to fig. 6, in one embodiment of an SDI12 sensor data wireless acquisition device and system based on NB-IoT, an SDI interface module includes a first interface port P1, a second interface port P2, a third interface port P3, a fourth interface port P4, and a fifth interface port P5, where the first interface port P1 includes an interface P11 and an interface P12, the second interface port P2 includes an interface P21 and an interface P22, the third interface port P3 includes an interface P31 and an interface P32, the fourth interface port P4 includes an interface P41 and an interface P42, the fifth interface port P5 includes an interface P51 and an interface P52, the interface P11, the interface P21, the interface P31, the interface P41, and the interface P51 are connected to a main control circuit board, and the interface P12, the interface P22, the interface P32, the interface P42, and the interface P52 are respectively connected to the sensor in communication. The SDI interface module is a circuit schematic diagram of an SDI interface module, namely an SDI12 communication protocol, and the SDI12 data recorder is used for communicating between the ASCII code and the sensor by uploading the ASCII code on a data line.
Referring to fig. 7 and 8, in one embodiment of the wireless SDI12 sensor data acquisition device and system based on NB-IoT, the wireless SDI sensor data acquisition device further includes a display module and a key module, the display module is connected to the main control module, the display module adopts an SPI liquid crystal screen, the MISO end of the SPI liquid crystal screen of the display module is connected to the PTC7 end of the main control chip STM32F407, the BLK end is connected to the PTD0 end, the DC end is connected to the PTD1 end, the RES end is connected to the PTD2 end, the MOSI end is connected to the PTC6 end, the CLK end is connected to the PTC5 end, and VCC3.3V is connected to the variable resistor PR2 and then connected to the light emitting diode P3.3; the display module is used for displaying signal values, operation menus and setting interfaces of the data sensing module, the key module is connected with the main control module, the key module comprises a touch sheet resistor R4, the touch sheet is connected with one end of the resistor R4, the other end of the resistor R4 is connected with a PTA2 end of a main control chip STM32F407 of the main control module, the key module is used for displaying parameter display interface switching, and the key module is partially provided with a TSI module as a touch pad to realize SI key.
Referring to fig. 9, a POWER module 2 supplies POWER to a device, the POWER module includes a voltage stabilizing chip tps70933, a capacitor PC2, a capacitor PC5, a capacitor PC3, a fuse PF1, and a diode PD2, an input terminal IN of the voltage stabilizing chip tps70933 is connected to a voltage VCC5V and to the capacitor PC2, the capacitor PC2 is connected to a GND terminal of the voltage stabilizing chip tps70933, an EN terminal of the voltage stabilizing chip tps70933 is connected to the VCC5V, an NC terminal is connected to the capacitor PC5, an OUT terminal is connected to the capacitors PC3 and VCC3.3V, and a POWER module's POWER is connected to the fuse PF1 and the diode PD2, and the voltage stabilizing chip tps70933 of the POWER module is used for stabilizing a voltage IN a circuit to prevent a circuit failure caused by voltage fluctuation. The fuse PF1 and the diode PD2 function as a protection circuit. The voltage is turned on when the signal needs to be collected, because the sensor is not required to work frequently in NB-IoT occasions, the electric quantity can be saved, and the cruising ability of the battery and the practicability of the product are improved.
In one embodiment of the NB-IoT based SDI12 sensor data wireless acquisition device and system, the data sensing module includes a soil temperature and humidity sensor, an air temperature and humidity sensor, a soil conductivity sensor, a soil oxygen sensor. The data sensing module is responsible for acquiring sensing data of a data source and converting the acquired analog signals into digital signals.
As shown in fig. 10, the present invention further provides a wireless data acquisition system based on NB-IoTde SDI12 sensor, where the acquisition system includes the above-mentioned data acquisition device, and the data acquisition system further includes an application scenario data source 10, NB-IoT base station 12, cloud server 14, and client 18. The application scene data source 10 is connected with the data acquisition device 11, and the data acquisition device 11 acquires data source data; the data acquisition device 11 establishes connection with the NB-IoT base station 12, and the NB-IoT base station 12 and the data acquisition device 11 conduct information transfer through a mobile communication center; the NBI-oT base station 12 establishes a connection relationship with a cloud server 14 through an NB-IoT network 13; the cloud server comprises a database storage module 15, a data analysis module 16 and a data operation module 17, wherein the database storage module 15 is connected with the data analysis module 16, the data analysis module 16 is connected with the data operation module 17, the database storage module 15 is used for storing various data, the data analysis module 16 is used for counting data sources and analyzing whether the data meet requirements, the data operation module 17 is used for receiving and transmitting the data meeting the requirements, and corresponding feedback is carried out on the data not meeting the requirements.
In one embodiment of the wireless data acquisition device and system for the SDI12 sensor based on NB-IoT, the application scenario data source 10 is used in the data acquisition occasions including the soil temperature and humidity sensor acquisition occasion, the air temperature and humidity sensor acquisition occasion, the soil conductivity sensor acquisition occasion and the soil oxygen content sensor acquisition occasion.
In one embodiment of the NB-IoT based SDI12 sensor data wireless acquisition device and system, the client 18 employs a computer and a mobile phone, the computer is an ali cloud browser connected to the acquisition system, and the mobile phone has a mobile phone application program and a WeChat public platform connected to the acquisition system.
Referring to fig. 11, the present invention further provides an NB-IoT based SDI12 sensor data wireless acquisition device and system, where the data acquisition method adopts the data acquisition device, and through the data acquisition system, the data acquisition method includes the following steps:
s1: acquiring data, namely arranging a data acquisition device in an application occasion, and acquiring an analog signal of the application occasion by a data sensing module;
s2: signal processing, namely, a data sensing module converts an acquired analog signal into a digital signal and uploads the digital signal to a signal conditioning module, the signal conditioning module filters the digital signal, an Arduino expansion board module and the digital sensing module mutually send ASCII code communication by adopting an SDI12 protocol, and the Arduino expansion board sends the data to a Modbus bus and uploads the digital signal to a main control module;
s3: performing NB-IoT operations-transmitting digital signals to a cloud server with NB-IoT base stations and NB-IoT networks using NB-IoT modules;
s4: the cloud server data processing-data analysis module is used for carrying out statistics and analysis on the data in the database storage module, and the data operation module is used for judging whether the data meets the requirements;
s5: and data display, namely the data operation module sends the judging result to the corresponding client.
The invention adopts the wireless acquisition technology of the SDI12 sensor data of NB-IoT, can realize the integrated management of various sensor data, monitors the sensor equipment in real time, and has the advantages of low cost, low power consumption and long-distance transmission.
While the invention has been described in detail in terms of general description and specific embodiments, modifications and improvements can be made without departing from the spirit of the invention, and the invention is defined by the appended claims.

Claims (4)

1. An NB-IoT based SDI12 sensor data wireless acquisition device, characterized in that: the wireless SDI12 sensor data acquisition device based on NB-IoT comprises a shell, a circuit board, a data sensing module, a main control module, an NB-IoT module, an Arduino expansion board module, a signal conditioning module, an SDI interface module and a power supply module; the data sensing module, the main control module, the NB-IoT module, the Arduino expansion board module, the signal conditioning module, the SDI interface module and the power supply module are assembled on the circuit board and are positioned in the shell, and the main control module is installed inside the shell; the power module is used for providing direct current power input for the main control module and each sub-module; the data sensing module is connected with the signal conditioning module and is used for collecting six sensing data of field soil temperature and humidity, air temperature and humidity, soil conductivity and soil oxygen content; the signal conditioning module is connected with the data sensing module, and filters the digital signals acquired and converted by the data sensing module; the Arduino expansion board module is used as a master controller to be connected with the signal conditioning module, a Modbus-RTU protocol is adopted inside the Arduino expansion board module to send the filtered digital signals to a Modbus, and the Arduino expansion board module is communicated with the sensor through the SDI interface module; the SDI interface module is connected with the main control module, namely an SDI12 communication protocol is established, and the SDI12 data recorder communicates with the sensor by uploading ASCII codes on a data line; the NB-IoT module is connected with the main control module and comprises an NB-IoT chip for wireless data transmission communication of the data acquisition device;
the data sensing module comprises a soil temperature and humidity sensor, an air temperature and humidity sensor, a soil conductivity sensor and a soil oxygen sensor, wherein the soil temperature and humidity sensor, the air temperature and humidity sensor, the soil conductivity sensor and the soil oxygen sensor are respectively connected with the signal conditioning module;
NB-IoT modules include connection hub J1, connection hub J1-2, connection hub J2-2, connection hub J3-2, connection hub J4-2, and MS3616 wireless communication modules, the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2 are connected to the main control module, and the MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2-2, the connection socket J3-2, the connection socket J4 and the connection socket J4-2; the NB-IoT module employs an MS3616 wireless communication module;
the signal conditioning module adopts a filter circuit to filter the digital signals acquired and converted by the sensor and screen out the required data;
the Arduino expansion board module uses Arduino/Genuino Uno as an expansion board, communicates with the sensor through an SDI12 protocol, collects sensor data and classifies the sensor data, adopts a Modbus-RTU protocol inside, and sends the collected data to a Modbus bus;
the SDI12 sensor data wireless acquisition device based on NB-IoT also comprises a display module and a key module, wherein the key module is connected with the main control module and used for displaying parameter display interface switching, and the key module is partly used as a touch pad to realize SI key; the display module is connected with the main control module, adopts an SPI liquid crystal screen and is used for displaying signal values, operation menus and setting interfaces of the data sensing module;
the SDI12 sensor data wireless acquisition system based on the NB-IoT comprises an SDI12 sensor data wireless acquisition device based on the NB-IoT, an application scene data source, an NB-IoT base station, a cloud server and a client, wherein the application scene data source is connected with the data acquisition device, and the data acquisition device acquires data source data; the data acquisition device establishes connection with the NB-IoT base station, and the NB-IoT base station and the data acquisition device conduct information transfer through a mobile communication center; the NBI-oT base station establishes a connection relationship with a cloud server through an NB-IoT network; the cloud server is connected with the client through a wireless network;
the acquisition method adopts an NB-IoT-based SDI12 sensor data wireless acquisition device, and the data acquisition method comprises the following steps:
acquiring data, arranging a data acquisition device in an application occasion, and acquiring an analog signal of the application occasion by a data sensing module;
the method comprises the steps of signal processing, namely a data sensing module converts an acquired analog signal into a digital signal and uploads the digital signal to a signal conditioning module, the signal conditioning module filters the digital signal, an Arduino expansion board module and the digital sensing module mutually send ASCII code communication by adopting an SDI12 protocol, and the Arduino expansion board sends the data to a Modbus bus and uploads the digital signal to a main control module;
performing NB-IoT operations, transmitting digital signals to a cloud server via the NB-IoT base station and the NB-IoT network using the NB-IoT module;
the cloud server data processing is carried out, the data analysis module carries out statistics and analysis on the data in the database storage module, and the data operation module judges whether the data meets the requirements;
and the data is displayed, and the data operation module sends the judging result to the corresponding client.
2. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 1, wherein: the cloud server comprises a database storage module, a data analysis module and a data operation module, wherein the database storage module is connected with the data analysis module, the data analysis module is connected with the data operation module, the database storage module is used for storing various data, the data analysis module counts data sources and analyzes whether the data meet requirements, the data operation module receives and transmits the data meeting the requirements, and feeds back the data not meeting the requirements.
3. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 2, wherein: the client adopts a computer or a mobile phone, the computer runs a cloud server browser connected to the data acquisition system, and the mobile phone has a corresponding application program;
the application scene data source is used for data acquisition occasions, including a soil temperature and humidity acquisition occasion, an air temperature and humidity acquisition occasion, a soil conductivity acquisition occasion and a soil oxygen acquisition occasion.
4. A method of acquisition employing the NB-IoT based SDI12 sensor data wireless acquisition device of claim 1, wherein: the acquisition method adopts an NB-IoT-based SDI12 sensor data wireless acquisition device, and the data acquisition method comprises the following steps:
acquiring data, arranging a data acquisition device in an application occasion, and acquiring an analog signal of the application occasion by a data sensing module;
the method comprises the steps of signal processing, namely a data sensing module converts an acquired analog signal into a digital signal and uploads the digital signal to a signal conditioning module, the signal conditioning module filters the digital signal, an Arduino expansion board module and the digital sensing module mutually send ASCII code communication by adopting an SDI12 protocol, and the Arduino expansion board sends the data to a Modbus bus and uploads the digital signal to a main control module;
performing NB-IoT operations, transmitting digital signals to a cloud server via the NB-IoT base station and the NB-IoT network using the NB-IoT module;
the cloud server data processing is carried out, the data analysis module carries out statistics and analysis on the data in the database storage module, and the data operation module judges whether the data meets the requirements;
and the data is displayed, and the data operation module sends the judging result to the corresponding client.
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