CN110839082A - Baking room parameter remote monitoring system based on dual-communication module - Google Patents
Baking room parameter remote monitoring system based on dual-communication module Download PDFInfo
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- CN110839082A CN110839082A CN201911128891.8A CN201911128891A CN110839082A CN 110839082 A CN110839082 A CN 110839082A CN 201911128891 A CN201911128891 A CN 201911128891A CN 110839082 A CN110839082 A CN 110839082A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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Abstract
The invention provides a curing barn parameter remote monitoring system based on a dual-communication module, which comprises: the system comprises a singlechip, an RS485 module, a 4G module and an NB-iot module; the RS485 module, the 4G module and the NB-iot module are all connected to a single chip microcomputer, and the RS485 module is connected with a curing barn controller; the 4G module and the NB-iot module work independently, and the single chip microcomputer is used for automatically detecting the signal strength of the 4G network of the 4G module and the NB-iot network of the NB-iot module, automatically selecting the network with the strongest signal and realizing data interaction with the information platform. The monitoring system disclosed by the invention can be compatible with a 4G network and an NB-iot network, can be automatically switched to an optimal state according to the strength and stability of a wireless signal on site of a curing barn, and meets the requirement of remote data acquisition of the bulk curing barn.
Description
Technical Field
The invention mainly relates to the technical field related to tobacco bulk curing barn, in particular to a curing barn parameter remote monitoring system based on a dual-communication module.
Background
At present, the tobacco industry is used in a monitoring system of a bulk curing barn controller, and remote communication is generally realized based on GPRS. Such as: the utility model discloses a flue-curing barn humiture remote monitoring system based on GPRS technique (publication number: CN 203083615U) in, put forward a series connection GPRS remote communication module between wet-dry bulb thermometer and flue-curing barn controller, can be in step with flue-curing barn humiture remote acquisition back information center, utility model patent flue-curing tobacco leaf toasts thing networking communication module (publication number CN208063247U) based on multichannel discloses a tobacco leaf toasts thing networking communication module based on multichannel, all utilizes the data of gathering with RS485 communication interface, fan interface and the sensor interface of bulk curing barn controller, the aforesaid is used for flue-curing barn remote control system all to realize based on the GPRS technique.
With the popularization of 4G/5G networks, the GPRS technology gradually exits the market, and the technology cannot meet the requirements. In the current communication field, technologies such as 4G, 5G, NB-iot, etc. all hold a certain share, so how to design a new data acquisition module to meet the remote data acquisition requirement of a bulk curing barn is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the problems, the invention provides a curing barn parameter remote monitoring system based on dual-communication modules, which adopts two communication modules, namely 4G and NB-iot, to replace a GPRS (general packet radio service) module in the traditional system, can meet the remote data acquisition requirement of a bulk curing barn, and improves the data interaction efficiency.
The technical scheme of the invention is as follows:
roast room parameter remote monitering system based on dual communication module includes: the system comprises a singlechip, an RS485 module, a 4G module and an NB-iot module;
the RS485 module, the 4G module and the NB-iot module are all connected to a single chip microcomputer, and the RS485 module is connected with a curing barn controller;
the 4G module and the NB-iot module work independently, and the single chip microcomputer is used for automatically detecting the signal strength of the 4G network of the 4G module and the NB-iot network of the NB-iot module, automatically selecting the network with the strongest signal and realizing data interaction with the information platform.
Further, the RS485 module is built by adopting an RS485 communication module or through discrete elements; the RS485 communication module adopts an MRS485-B type complete isolation RS485 transceiver or an ADUM3201 type RS485 isolation communication module.
Further, the 4G module adopts a SIM7600CE module or a USR-LTE-7S4 module.
Further, the NB-iot module adopts an M5312 module or a BC95 module.
Further, the single chip microcomputer adopts a 51 series single chip microcomputer, a PIC series single chip microcomputer or an STM series single chip microcomputer.
Further, the single chip microcomputer adopts STM32F103, the RS485 module adopts an MRS485-B type completely isolated RS485 transceiver, the 4G module adopts an USR-LTE-7S4 module, and the NB-iot module adopts a BC95 module.
Further, the 4G module adopts an HTTPD working mode and a TDD-LTE network, and the package of the serial port data packet reduced in the HTTPD working mode is sent as an HTTP data packet.
Furthermore, the NB-iot module adopts a COAP transparent transmission mode, and a communication protocol is customized to realize data receiving and sending of the single chip microcomputer and the information platform.
The invention has the beneficial effects that:
according to the curing barn parameter remote monitoring system based on the dual-communication module, the GPRS module is replaced by the two communication modules of 4G and NB-iot, the two communication modules work independently, the single chip microcomputer selects one of the communication modules to be used for transmitting data according to the strength and the stability of a wireless signal, compared with the traditional monitoring system, the monitoring system disclosed by the invention can be compatible with a 4G network and an NB-iot network, and can be automatically switched to an optimal state according to the strength and the stability of the wireless signal of a curing barn site, so that the remote data acquisition requirement of a bulk curing barn is met.
Drawings
FIG. 1 is a hardware structure diagram of a baking room parameter remote monitoring system based on a dual communication module;
FIG. 2 is a block diagram of 4G;
fig. 3 is a schematic diagram of an HTTP request process.
Detailed Description
The present embodiment will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present embodiments. Furthermore, it should be understood that various changes or modifications to the embodiments can be made by those skilled in the art after reading the teaching of the embodiments, and these equivalents also fall within the scope defined by the present application.
As shown in FIG. 1, it is a hardware structure diagram of the dual communication module-based remote monitoring system for parameters of a curing barn. The system consists of a single chip microcomputer, an RS485 module, a 4G module and an NB-iot module. The singlechip can be a 51 series, PIC series or STM series singlechip; the RS485 module can be built by adopting a special RS485 communication module (such as an MRS485-B type complete isolation RS485 transceiver, an ADUM3201 type RS485 isolation communication module and the like) or a discrete element; the 4G module selects an SIM7600CE module or a USR-LTE-7S4 module; NB-iot is selected from M5312 module or BC95 module.
In this embodiment, the configuration is particularly preferred as follows: the system comprises a single chip microcomputer STM32F103, an MRS485-B type complete isolation RS485 transceiver, a USR-LTE-7S4 module and a BC95 module.
In the invention, the remote monitoring system for the parameters of the curing barn can be compatible with a 4G network and an NB-iot network, and can be automatically switched to an optimal state according to the strength and stability of wireless signals on site of the curing barn. The design core is how to construct the dual communication module and automatically switch between the 4G network and the NB-iot network. The method comprises the following steps:
1. the 4G module connection is shown in fig. 2. A serial port-to-4G transparent transmission module developed based on an embedded Linux system is a USR-LTE-7S4, and is used for sending serial port data input by a singlechip through a 4G network, receiving return data, analyzing the return data into serial port data and outputting the serial port data to the singlechip. The SIM card function is integrated, and the 4G and the 3G and 2G networks of the Unicom, the mobile and the telecom are supported. Working parameters are configured through AT instructions, functions of self-defining registration packets and heartbeat packets are supported, 4-path Socket connection is achieved, and FTP updating and self-updating protocols are supported. It has two modes of operation: the network transparent transmission mode encapsulates serial port data into TCP or UDP data and supports long connection and short connection; and the HTTPD mode packages the serial port data into an HTTP data packet and sends the HTTP data packet. The 4G module is powered by a 5V power supply, the working voltage of a serial port is 3.3V, and the serial port is directly connected with the serial port of the single chip microcomputer. The gain of the full-band sucker antenna externally connected with the SMA interface is 8 dB. The module adopts an LED to display the working state, and the pins LINKA/LINKB, WORK and NET of the indicating lamp respectively indicate and output the network connection state, the working state and the network state.
2. The NB-iot chip selected by the system is a BC95 module, BC95 is an NB-iot module which is introduced in the earliest period, the size is small, the power consumption is low, the function is strong, and the design requirement of small equipment of the terminal is greatly met. LCC encapsulation and embedded network protocol are adopted, and the ultra-low power consumption and ultra-high sensitivity are realized. This design is based on BC95 wireless NB module, and it possesses power indicator 1 way, and 1 way of network status indicator, Micro SIM cassette is 1. 8 pins are led out from the module and are used for being in butt joint with a main control board, the working temperature is-40 to +85 ℃, AT instruction configuration is supported, and data transmission is 100 bps.
In the circuit of the BC95 module, the module has 94 pins, of which 54 are LCC pins and the remaining 40 are LGA pins. The power supply range is 3.1-4.2V. The SIM card is provided by the telecommunications operator and is provided with a unique IMEI code.
The specific embodiment of the invention is as follows:
1. considering the expandability of platform services and the safety of communication, the 4G module adopts an HTTPD mode; the HTTP data packet has a larger length than the TCP/UDP data packet, so that by adopting the TDD-LTE network, the lower transmission rate can reach 150Mb/s at the downlink, and the uplink speed can reach 50Mb/s at the uplink, thereby meeting the real-time requirement of the system.
The process of completing one HTTP request is shown in fig. 3.
(1) Sending a request to the platform to obtain the current network time, returning a time character string such as 20190820132748 by the system, and taking 0820132748 rear 10 characters as St;
(2) and continuously generating 6 random numbers by adopting a rand function, searching ASCII characters corresponding to the random numbers to obtain 6 characters, and combining St with the 6 characters to obtain a random character string. Since the random string contains the current time, even if the rand function has the same random number seed, a non-repeating random string can be obtained.
2. The NB-iot module adopts a COAP transparent transmission mode, self-defines a communication protocol to realize data receiving and sending of the terminal control equipment and the information platform. In the uplink process, the main controller packs data into a string format of "AT + NMGS ═ length > (byte number), < data > (data exists in the form of field 1& field 2 … & field n)" through an AT instruction, and AT the same time, sends the AT instruction to the NB-iot module through full-duplex URAT, and the NB-iot module sends the packed data to the information platform. When the information platform receives the downlink message from the client, the platform sends the downlink message to the NB-iot module in the form of "+ NNMI: < length >, < data >", and then sends the data to the terminal control module for analysis and processing.
3. The single chip microcomputer STM32F103 automatically detects the signal intensity of the 4G network and the NB-iot network, and automatically selects the network with the strongest signal to send data to the information platform.
Claims (8)
1. Roast room parameter remote monitering system based on dual communication module, its characterized in that includes: the system comprises a singlechip, an RS485 module, a 4G module and an NB-iot module;
the RS485 module, the 4G module and the NB-iot module are all connected to a single chip microcomputer, and the RS485 module is connected with a curing barn controller;
the 4G module and the NB-iot module work independently, and the single chip microcomputer is used for automatically detecting the signal strength of the 4G network of the 4G module and the NB-iot network of the NB-iot module, automatically selecting the network with the strongest signal and realizing data interaction with the information platform.
2. The dual communication module-based remote monitoring system for parameters of a baking room of claim 1, wherein: the RS485 module is built by adopting an RS485 communication module or discrete elements; the RS485 communication module adopts an MRS485-B type complete isolation RS485 transceiver or an ADUM3201 type RS485 isolation communication module.
3. The dual communication module-based remote monitoring system for parameters of a baking room of claim 1, wherein: the 4G module adopts a SIM7600CE module or a USR-LTE-7S4 module.
4. The dual communication module-based remote monitoring system for parameters of a baking room of claim 1, wherein: the NB-iot module is an M5312 module or a BC95 module.
5. The dual communication module-based remote monitoring system for parameters of a baking room of claim 1, wherein: the single chip microcomputer adopts a 51 series single chip microcomputer, a PIC series single chip microcomputer or an STM series single chip microcomputer.
6. The dual communication module-based remote monitoring system for parameters of a baking room of claim 1, wherein: the single chip microcomputer adopts STM32F103, the RS485 module adopts an MRS485-B type completely-isolated RS485 transceiver, the 4G module adopts an USR-LTE-7S4 module, and the NB-iot module adopts a BC95 module.
7. The dual communication module-based remote monitoring system for parameters of a baking room of claim 6, wherein: the 4G module adopts an HTTPD working mode and a TDD-LTE network, and the descending serial port data packet of the HTTPD working mode is sent as an HTTP data packet.
8. The dual communication module-based remote monitoring system for parameters of a baking room of claim 6, wherein: the NB-iot module adopts a COAP transparent transmission mode, and self-defines a communication protocol to realize data receiving and sending of the singlechip and the information platform.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112367207A (en) * | 2020-11-13 | 2021-02-12 | 中国烟草总公司河南省公司 | Universal Internet of things equipment suitable for tobacco leaf baking controller and matching method |
| CN118158259A (en) * | 2024-05-09 | 2024-06-07 | 四川省农业机械科学研究院 | Tobacco processing method and system based on Internet of things |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112367207A (en) * | 2020-11-13 | 2021-02-12 | 中国烟草总公司河南省公司 | Universal Internet of things equipment suitable for tobacco leaf baking controller and matching method |
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| CN118158259A (en) * | 2024-05-09 | 2024-06-07 | 四川省农业机械科学研究院 | Tobacco processing method and system based on Internet of things |
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Application publication date: 20200225 |