CN111654834A - NB-IoT-based SDI12 sensor data wireless acquisition device, system and method - Google Patents

Abstract

The invention discloses an SDI12 sensor data wireless acquisition device and system based on NB-IoT, wherein a power supply module is used for providing power supply input for a main control module and each submodule; the data sensing module is directly connected with the signal conditioning module and is used for collecting six kinds of 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, namely an 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 and comprises an NB-IOT chip used for wireless data transmission and communication of the data acquisition device.

Description

NB-IoT-based SDI12 sensor data wireless acquisition device, system and method

The technical field is as follows:

the invention relates to the technical field of intelligent irrigation of farmlands, in particular to an SDI12 sensor data wireless acquisition device, system and method based on NB-IoT.

Background art:

the internet of things is a network concept that various information sensing devices are connected with any device and the internet for communication through domain names of the internet of things 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 and GPS satellite positioning, distribution and sharing of information are achieved through short-distance communication modes such as Bluetooth and Zigbee and long-distance communication modes of a mobile communication network, and decision making and intelligent control are achieved 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 and high transmission efficiency, but has high energy consumption on equipment, and is not suitable for being used as a bottom-layer internet of things technology. The Internet of things is an object-oriented and person-to-object network, comprises a plurality of sensing units such as sensors and RFID, and supports a plurality of network communication modes; the sensor network is concentrated on the end connection between objects, the sensing and collection of physical world information and the distribution and aggregation efficiency of the network, the low-speed high-efficiency sensor network is concentrated on, and the low power consumption and the low consumption are realized.

NB-IoT is a narrow-band IoT technology based on LTE cellular mobile network, has the characteristics of wide coverage, many 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 information into an electric signal or other required forms of information according to a certain rule to output, and can meet the requirements of information transmission, processing, storage, display, control and the like. The existing sensor generally adopts a wired connection mode and can only meet the requirement of single-type acquisition, unified analysis and processing of various sensor data cannot be carried out, the cost for acquiring the data is high, and the requirement of real-time monitoring data cannot be met.

SDI12 is a standard for data recorders based on microprocessor sensor interfaces, and SDI12 provides a baud rate of 1200 bits for data string interfaces. SDI12 may be used in low power, low cost systems and systems where the distance between the sensor and the data recorder may be as much as 60.96 meters. The data recorder interface can adapt to various sensors, and the sensor interface can also adapt to various data recorders. Power is supplied to the sensor through the interface, and the sensor can be replaced without having to re-program the data recorder for verification or other information.

The invention content is as follows:

in view of the above, it is desirable to provide an NB-IoT-based SDI12 sensor data wireless acquisition apparatus, 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 supply module is used for providing direct current power supply input for the main control module and each submodule; the data sensing module is connected with the signal conditioning module and is used for collecting six kinds of 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 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 in the Arduino expansion board module to send the filtered digital signals to a Modbus, and the Arduino is communicated with the sensor through an SDI interface module; the SDI interface module is connected with the main control module, namely an 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 and comprises an NB-IOT chip used for wireless data transmission and 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 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 module includes a connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, a connection socket J4-2 and an MS3616 wireless communication module, the connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, a connection socket J4-2 are connected to the main control module, the MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2, the connection socket J2-2, the connection socket J3, the connection socket J3-2, the connection socket J4, the connection socket J4-2; the NB-IoT module adopts an MS3616 wireless communication module, and the ME3616 wireless communication module is designed for the Internet of things application with low speed, low power consumption and distance and mass connection, and supports various network protocols. The ME3616 wireless communication module is an NB-IoT communication standard-based mobile exert oneself communication network module adopting LCC encapsulation. Under the NB-IoT standard, the module can provide a maximum of 66Kbps uplink rate and 34Kbps downlink rate.

Preferably, the signal conditioning module adopts a filter circuit to filter the digital signal acquired and converted by the sensor, and screen 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 and classifies sensor data, and sends the collected data to a Modbus bus by adopting a Modbus-RTU protocol inside.

Preferably, the SDI12 sensor data wireless 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 a part of the key module adopts a TSI module 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 the signal value and the operation menu of the data sensing module and setting an interface.

An NB-IoT-based SDI12 sensor data wireless acquisition system comprises the NB-IoT-based SDI12 sensor data wireless acquisition device, 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 of the data source; the data acquisition device is connected with the NB-IoT base station, and the NB-IoT base station and the data acquisition device carry out information transmission through a mobile communication center; the NBI-oT base station establishes a connection relation 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, 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 sending the data meeting the requirements and feeding back the data not meeting the requirements.

Preferably, the client side adopts a computer or a mobile phone, the computer runs a cloud server browser connected to the data acquisition system, and the mobile phone side is provided with a corresponding application program.

Preferably, the application scene data source index data acquisition occasions include 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.

An NB-IoT-based SDI12 sensor data wireless acquisition method, which adopts the data acquisition device, and with the data acquisition system, 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 system comprises a data sensing module, a signal conditioning module, an Arduino expansion board module, a Modbus bus and a main control module, wherein the data sensing module converts acquired analog signals into digital signals and uploads the digital signals to the signal conditioning module, the signal conditioning module filters the digital signals, the Arduino expansion board module and the digital sensing module mutually transmit ASCII codes by adopting an SDI12 protocol for communication, and the Arduino expansion board transmits the data to the Modbus bus and uploads the digital signals to the main control module;

performing NB-IoT operation, and transmitting the digital signal to a cloud server by means of an NB-IoT base station and an NB-IoT network by utilizing an NB-IoT module;

the cloud server data processing, 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 meet the requirements or not;

and displaying the data, and sending the judgment result to the corresponding client by the data operation module.

The invention has the following advantages: by adopting the NB-IoT-based SDI sensor data wireless acquisition method, integrated statistics and analysis can be performed on different sensor data of different complex occasions, operators can monitor data of various sensor devices in real time, remote transmission can be realized, and environmental requirements can be conveniently judged. 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 from acquisition to management is realized, and the low power consumption and the low cost make the acquisition device and the system more compatible with the people.

Description of the drawings:

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a connection structure of an NB-IoT-based SDI12 sensor data wireless acquisition device module;

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 a schematic circuit diagram of an Arduino expansion board module of the SDI12 sensor data wireless acquisition device based on NB-IoT;

FIG. 5 is an NB-IoT module circuit schematic diagram of an NB-IoT based SDI12 sensor data wireless acquisition device;

FIG. 6 is a schematic circuit diagram of an SDI interface module of an NB-IoT based SDI12 sensor data wireless acquisition device;

FIG. 7 is a schematic circuit diagram of a display module 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 an NB-IoT based SDI12 wireless sensor data acquisition system;

FIG. 11 is a flowchart of an NB-IoT based SDI12 sensor data wireless acquisition device and a 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 implementation mode is as follows:

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of 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 present invention, 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 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The present invention provides the following specific examples.

As shown in fig. 1, an NB-IoT-based SDI12 sensor data wireless acquisition device comprises a shell, a shell internal circuit board and 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 supply module 2 is used for providing 5V direct current power supply input for the main control module 1 and each submodule; 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 kinds of 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, and filters and uploads digital signals acquired and converted by the data sensing module 3 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 is communicated with a sensor through an SDI12 protocol, sensor data are collected and classified, and a Modbus-RTU protocol is adopted to send the collected data to a Modbus; 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 and communication of a data acquisition device.

Referring to fig. 2, IN an embodiment of an NB-IoT-based SDI12 sensor data wireless acquisition apparatus and system, a main control module includes a main control circuit board, a main 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 to a voltage input terminal and a P-VCC5V power supply, an EN pin is connected to a first resistor PR1, a first resistor PR1 is connected to a PTC4 terminal, a CT pin is connected to a first capacitor PC1, a first capacitor PC1 is connected to a VIN terminal, a pin QOD is connected to a variable resistor PR3, a pin IN of the second voltage regulator U2 is connected to a pin GND and a second capacitor PC2, and then to a connecting wire, the pin EN is connected to the VCC5V, a pin NC is connected to a capacitor PC5, and a pin OUT is connected to a capacitor PC VCC3.3V and connected to a capacitor PC 3; pin VCC of FLASH memory MU2 is connected to HOLD and VCC3.3V and to capacitor MC 1; the main control chip STM32F407 of the main control module has high running frequency of the kernel Cortex-M0, reserves a 485 wired communication interface, integrates the functions of FLASH, SRAM, SPI and the like, supports the functions of off-chip FLASH, SRAM, PSRAM, NOR and NAND FLASH, has strong functions but extremely low power consumption, and can be flexibly selected by a user.

Referring to fig. 3, in an embodiment of an NB-IoT-based SDI12 sensor data wireless acquisition device and system, a signal conditioning module includes a schematic circuit diagram, the signal conditioning module includes a filter circuit, 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 terminal 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 ground connection line GND, the filter circuit aims to reduce an alternating current component in a pulsating direct current voltage, retain a direct current component thereof, reduce a ripple coefficient of an output voltage, and smooth a waveform. A0 terminates the 5V power, and resistance R12 and R11 are used for playing the current-limiting protection effect, and D11 is the voltage limiting circuit that four zener diodes constitute, and electric capacity C11 constitutes the filter circuit with resistance R13, and D12 constitutes the lightning protection circuit.

Referring to fig. 4, in an embodiment of an NB-IoT based SDI12 sensor data wireless acquisition device and system, an Arduino expansion module according to a related circuit schematic diagram includes a logic gate operation chip sn74ahclg04, a MAX485 chip, a resistor RS1, a resistor RS2, a capacitor CS1, a resistor RS3, a resistor RS3, a resistor RS4, a resistor RS5, a voltage limiting circuit DS1, an overcurrent protector LP-MSM-010 and a 485 chip, a pin Y of the logic gate operation chip sn74ahclg04 is connected to a pin RE and a pin DE of the 485 chip, a pin DI of the MAX485 chip is connected to a DI/TX 2 and is connected to a resistor RS 9626, a pin RO of the MAX chip is connected to a resistor RS1 and is connected to a DO/RX 632 and is connected to a pin B of the logic gate operation chip sn74ahclg04 and a pin B of the resistor VCC V, a pin B of the VCC 638 is connected to a pin TX 485 chip and a resistor RS1 and a pin TX 638, the resistor RS5 and the over-current protector LP-MSM-010 are connected, a pin A of the MAX485 chip is connected with the resistor RS4, and is connected with the voltage limiting circuit DS1, the resistor RS5 and the over-current protector LP-MSM-010, and the 485 chip is connected with the over-current protector LP-MSM-010; the Arduino expansion module adopts Arduino/geniuino Uno, is connected with the main control board through DI/TX and DO/RX, regards the RS485 interface as a networking interface, and can monitor the data of the sensor collected by the Arduino expansion module through the 485 interface. The half-duplex network formed by the RS485 interface is generally a two-wire system, and mostly adopts shielded twisted pair transmission. The wiring mode is that a bus type topological structure can be connected with 32 nodes on the same bus at most. In the RS485 communication network, a master-slave communication mode is generally adopted, that is, one master has a plurality of slaves. In many cases, a pair of twisted-pair 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 DB-9 plug socket, the DB-9 hole is adopted for the RS485 interface of the intelligent terminal, and the DB-9 pin is adopted for the RS485 interface of the keyboard interface connected with the keyboard.

Referring to fig. 5, in an embodiment of an NB-IoT-based SDI12 sensor data wireless acquisition apparatus and system, an NB-IoT module includes a connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, a connection socket J4-2, and an MS3616 wireless communication module, a connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, and a connection socket J4-2 are connected to a host control module, an MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2, the connection socket J2-2, the connection socket J3, and the connection socket J3-2, The connection socket J4 and the connection socket J4-2 are connected. The NB-IoT module adopts an MS3616 wireless communication module, and the ME3616 is designed for the Internet of things application with low speed, low power consumption, distance and mass connection and supports various network protocols. ME3616 is an NB-IoT communication standard-based mobile exert oneself communication network module employing LCC encapsulation. Under the NB-IoT standard, the module can provide a maximum of 66Kbps uplink rate and 34Kbps downlink rate.

Referring to fig. 6, in an embodiment of an NB-IoT based SDI12 sensor data wireless acquisition apparatus and system, 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, the first interface port P1 includes interfaces P11 and P12, the second interface port P2 includes interfaces P21 and P22, the third interface port P3 includes interfaces P31 and P32, the fourth interface port P4 includes interfaces P41 and P42, the fifth interface port P5 includes interfaces P51 and P52, the interfaces P11, P21, P31, P41, and P51 are connected to a master control circuit board, and the interfaces P12, P22, P32, P42, and P3875 are respectively connected to a sensor communication interface 52. The SDI interface module is a SDI12 communication protocol, and the SDI12 data recorder communicates with the sensor by transmitting ASCII codes on a data line.

Referring to fig. 7 and 8, in an embodiment of an SDI12 sensor data wireless acquisition device and system based on NB-IoT, the device further includes a display module and a key module, the display module is connected to the main control module, the display module uses an SPI liquid crystal screen, a MISO end of the SPI liquid crystal screen of the display module is connected to a PTC7 end of the main control chip STM32F407, a BLK end is connected to a PTD0 end, a DC end is connected to a PTD1 end, a RES end is connected to a PTD2 end, a MOSI end is connected to a PTC6 end, a CLK end is connected to a PTC5 end, and a VCC3.3V is connected to a light emitting diode P3.3 after being connected to a variable resistor PR 2; the display module is used for displaying a signal value and an operation menu of the data sensing module and setting an interface, the key module is connected with the main control module and comprises a touch sheet resistor R4, the touch sheet is connected with one end of a 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 TSI module is used as a touch pad to realize SI key.

Referring to fig. 9, the POWER module 2 supplies POWER to the device, and the POWER module includes a voltage regulation 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 regulation chip tps70933 is connected to a voltage VCC5V and to a capacitor PC2, a capacitor PC2 is connected to a GND terminal of the voltage regulation chip tps70933, an EN terminal of the voltage regulation chip tps70933 is connected to a VCC5V, an NC terminal is connected to a capacitor PC5, an OUT terminal is connected to capacitors PC3 and VCC3.3V, a POWER of the POWER module is connected to a fuse PF1 and a diode PD2, and the voltage regulation chip tps70933 of the POWER module is used for stabilizing the voltage IN the circuit and preventing voltage fluctuation from causing circuit failure. Fuse PF1 and diode PD2 function to protect the circuit. The voltage is switched on when the signals need to be collected, and the sensor generally does not need to work frequently in an NB-IoT occasion, so that the electric quantity can be saved, and the cruising ability and the product practicability of the battery are improved.

In one embodiment of the NB-IoT based SDI12 sensor data wireless acquisition device and system, 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. The data sensing module is responsible for acquiring sensing data of a data source and converting acquired analog signals into digital signals.

As shown in fig. 10, the invention further provides a sensor data wireless acquisition system based on NB-IoT de SDI12, the acquisition system includes the above data acquisition device, and the data acquisition system further includes an application scenario data source 10, an NB-IoT base station 12, a cloud server 14, and a client 18. The application scene data source 10 is connected with the data acquisition device 11, and the data acquisition device 11 acquires data of the data source; 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 transmit information 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 counts data sources and analyzes whether the data meet requirements, the data operation module 17 receives and transmits the data meeting the requirements, and correspondingly feeds back the data not meeting the requirements.

In an embodiment of an NB-IoT-based SDI12 sensor data wireless acquisition device and system, the application scenario data source 10 is in a data acquisition situation, including a soil temperature and humidity sensor acquisition situation, an air temperature and humidity sensor acquisition situation, a soil conductivity sensor acquisition situation, and a soil oxygen content sensor acquisition situation.

In one embodiment of an 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 airy browser connected to the acquisition system, and the mobile phone has a mobile phone application and a wechat public platform connected to the acquisition system.

Referring to fig. 11, the invention also provides an NB-IoT-based SDI12 sensor data wireless acquisition device and system, the data acquisition method adopts the data acquisition device, and by 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 converting the acquired analog signals into digital signals by the data sensing module and uploading the digital signals to the signal conditioning module, filtering the digital signals by the signal conditioning module, sending ASCII code communication to the Arduino expansion board module and the digital sensing module by adopting an SDI12 protocol, sending data to a Modbus by the Arduino expansion board module, and uploading the digital signals to the main control module;

s3: performing NB-IoT operation, namely transmitting digital signals to a cloud server by virtue of an NB-IoT base station and an NB-IoT network by utilizing an NB-IoT module;

s4: the cloud server data processing-data analysis module counts and analyzes data in the database storage module, and the data operation module judges whether the data meet requirements;

s5: and (4) data display-the data operation module sends the judgment result to the corresponding client.

The invention adopts the NB-IoT SDI12 sensor data wireless acquisition technology, can realize the integrated management of various sensor data and the real-time monitoring of sensor equipment, and has the advantages of low cost, low power consumption and long-distance transmission.

Having thus described the invention by way of illustration and example in detail, it is intended that all such modifications and improvements thereto be within the scope of the invention as claimed and that all such modifications and improvements thereto may be made without departing from the spirit of the invention.

Claims (10)

1. An NB-IoT based SDI12 sensor data wireless acquisition device, characterized in that: the 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 supply module is used for providing direct current power supply input for the main control module and each submodule; the data sensing module is connected with the signal conditioning module and is used for collecting six kinds of 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 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 in the Arduino expansion board module to send the filtered digital signals to a Modbus, and the Arduino is communicated with the sensor through an SDI interface module; the SDI interface module is connected with the main control module, namely an 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 and comprises an NB-IOT chip used for wireless data transmission and communication of the data acquisition device.

2. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 1, wherein: 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.

3. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 2, wherein: the NB-IoT module comprises a connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, a connection socket J4-2 and an MS3616 wireless communication module, wherein the connection socket J1, a connection socket J1-2, a connection socket J2, a connection socket J2-2, a connection socket J3, a connection socket J3-2, a connection socket J4, a connection socket J4-2 are connected to the master control module, and the MS3616 wireless communication module is connected with the connection socket J1, the connection socket J1-2, the connection socket J2, the connection socket J2-2, the connection socket J3, 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.

4. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 3, wherein: 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.

5. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 4, wherein: the Arduino expansion board module uses Arduino/Genuino Uno as an expansion board, communicates with the sensor through SDI12 protocol, collects and classifies sensor data, adopts Modbus-RTU protocol inside, and sends the collected data to the Modbus.

6. The NB-IoT based SDI12 sensor data wireless acquisition device of claim 5, wherein: the SDI12 sensor data wireless 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 a part of the key module adopts a TSI module 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 the signal value and the operation menu of the data sensing module and setting an interface.

7. A wireless acquisition system comprising the NB-IoT based SDI12 sensor data wireless acquisition device of any one of claims 1-6, wherein: the SDI12 sensor data wireless acquisition system based on NB-IoT comprises an SDI12 sensor data wireless acquisition device based on 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 of the data source; the data acquisition device is connected with the NB-IoT base station, and the NB-IoT base station and the data acquisition device carry out information transmission through a mobile communication center; the NBI-oT base station establishes a connection relation with a cloud server through an NB-IoT network; the cloud server is connected with the client through a wireless network.

8. The NB-IoT based SDI12 sensor data wireless acquisition system of claim 7, 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 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.

9. The NB-IoT based SDI12 sensor data wireless acquisition system of claim 8, wherein: the client side adopts a computer or a mobile phone, the computer runs a cloud server browser connected to the data acquisition system, and the mobile phone side is provided with a corresponding application program;

the application scene data source index data acquisition occasions comprise 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.

10. An acquisition method using the NB-IoT based SDI12 sensor data wireless acquisition device according to any one of claims 1 to 6, wherein: the acquisition method adopts an NB-IoT based SDI12 sensor data wireless acquisition device, and 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 system comprises a data sensing module, a signal conditioning module, an Arduino expansion board module, a Modbus bus and a main control module, wherein the data sensing module converts acquired analog signals into digital signals and uploads the digital signals to the signal conditioning module, the signal conditioning module filters the digital signals, the Arduino expansion board module and the digital sensing module mutually transmit ASCII codes by adopting an SDI12 protocol for communication, and the Arduino expansion board transmits the data to the Modbus bus and uploads the digital signals to the main control module;

performing NB-IoT operation, and transmitting the digital signal to a cloud server by means of an NB-IoT base station and an NB-IoT network by utilizing an NB-IoT module;

the cloud server data processing, 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 meet the requirements or not;

and displaying the data, and sending the judgment result to the corresponding client by the data operation module.

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