CN109068399A - A kind of field ad hoc network wireless telecommunication system - Google Patents
A kind of field ad hoc network wireless telecommunication system Download PDFInfo
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- CN109068399A CN109068399A CN201811187610.1A CN201811187610A CN109068399A CN 109068399 A CN109068399 A CN 109068399A CN 201811187610 A CN201811187610 A CN 201811187610A CN 109068399 A CN109068399 A CN 109068399A
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- Prior art keywords
- module
- hoc network
- field
- telecommunication system
- wireless telecommunication
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The design is using STM32 single-chip microcontroller as core component, and using Lora technology as Primary communication technical support, wireless digital broadcasting station realizes the mutual wireless communication of transmitting terminal and receiving end, constructs a kind of field ad hoc network wireless telecommunication system as communication port.Hardware components are mainly turned the devices such as TTL serial port module, mobile power source module and are formed by STM32 lease core system development plate, voice playing module, wireless transmission radio station, RS232；C programmer is written as to executable file by Keil software, is burnt in STM32 single-chip microcontroller by serial ports assistant.The system is triggered by key, the effective triggering mode of low level, it is handled by STM32 single-chip microcontroller, it is sent by being wirelessly transferred radio station, again by another reception terminal, it is handled by the STM32 single-chip microcontroller of receiving end, signal is analyzed, is handled, is stored, is transmitted, final voice playing module reads and plays the voice messaging in SD card corresponding to the data that receive.The design is at low cost, consumes energy less, is easy to operate, portable, and the fleet suitable for the fields location such as mountain area advances, and effective distance can achieve 2000 meters.
Description
Technical field
It is the telecommunication technology based on Lora spread spectrum technic the invention belongs to internet of things field, it is mono- with STM32
Piece machine is the universal communication equipment of core chips.
Background technique
Since the mankind step into twentieth century, new milestone has been started in social development, thus wireless communication era marches toward newly
Epoch.Relative to other social products, the mankind remain the same from beginning to end to the research of wireless communication, and social economy develops rapidly at certain
In kind meaning, the space of fertile soil and development is provided to wireless communication system.Meanwhile in order to cooperate scientific investigation personnel on mountain
The location of the fields such as area, valley swinging of signal point carries out real time communication, needs a easy to carry, signal stabilization, transmission range
Universal communication equipment remote enough, energy consumption is low.
The technology that LoRa is used is linear frequency hopping spread spectrum, under the premise of real-time Transmission, receives both ends with certain spy
The narrow frequency carrier wave of setting formula transmits signal, and has good weak to anti-multipath and Doppler effect a ability, and one piece
LoRa receives chip and can even recover the signal of a 19.5dB lower than noise, can be carried out using LoRa technology low
The communication of power consumption long-distance.Since LoRa has advantage outstanding in the spread spectrum communication of extra long distance, there is high sensitivity, resist
Interference it is very capable, and the circuit cost integrate with LoRa communication module is cheap, but have consummate manufacture craft with
The industry level of superelevation is the communication chip of a great development prospect.LoRa uses Star Network framework, compared to mesh network
Network framework, it has lower delay, simpler network structure.Spread spectrum chip based on LoRa not only may be implemented to save
Point directly carries out networking connection with concentrator, constitutes star-shaped network structure；For gateway can be used apart from farther away node
It is attached with relay networking.LoRa network can both build the wider wide area network infrastructure of coverage area, can also pass through
Simple gateway builds local area network, as long as being embedded in LoRa chip or module in internet of things equipment, can complete quickly to match
Set and realize quickly networking, the characteristics of this technology has.
(1) Different Modulations such as FSK, MSK LoRa modem: are supported.
(2) there is highly sensitive and high reliability.
(3) there is powerful anti-interference, antiblocking characteristic.
(4) internal that there is bit synchronization setting, it can voluntarily carry out clock recovery.
(5) there is automated radio frequency signal detection.
(6) internal to have temperature sensor and low battery signal indicator.(7) preamble detection.
(8) there is high power amplifier.
Summary of the invention
This field self-organizing network system is useful in more people's communication systems under the severe geographical environment in field, has good reality
When communication capacity.Specific working method is to collect data by a terminal, is then sent to other receiving ends, it is other at
Member makes corresponding reaction according to the information of receiving again, is a kind of universal communication equipment suitable for field.
System includes sending and receiving two foundations, due to being to be in communication with each other, the design of hardware and the volume of software
It translates almost the same.Wherein transmitting terminal is responsible for serving as the various command informations of host transmission, as shown in Figure 1 as a data terminal；
Another data terminal is referred to as receiving end, receives the data command issued from transmitting terminal, and make corresponding reply
Movement.Since transmitting terminal is a wireless digital broadcasting station as shown in Figure 3, it is as shown in Figure 4 that multiple wireless receiving ends can be set.
The main process of the main program of system be exactly the initialization of each module, serial ports send, serial ports receive and for
The control of voice module, the data packet for sending and receiving are deposited in SD card, and control flow chart is as shown in Figure 2.Key system is logical
It crosses external line and I/O port is connect with chip, the signal of input directly depends on generated level arteries and veins when whether key is pressed
Punching, wherein representing low level by key pressing.In addition, occur the situation of time-out when sending and receiving data, it is at this moment fixed
When device can solve this problem.
Detailed description of the invention
Fig. 1 is the principle of this design block diagram.
Fig. 2 is the software principle figure of the design.
Fig. 3 is transmitting terminal figure in system communication principle.
Fig. 4 is receiving end figure in system communication principle.
Specific embodiment
Firstly, the transmission of data, processing, receive all carried out in STM32 single-chip microcontroller, minimum system includes external stabilization
Power supply circuit, clock oscillation circuit, reset circuit.Followed by the functional mode of transmitting terminal has 7 kinds, respectively its number 1-7.It connects
The functional mode of receiving end shares 3 kinds, marked as 123.By 8 independent by the I/O port for being keyed to MCU, have more conducts
Preliminary data mouth, with the effective mode of low level come triggering command execution.Transmitting terminal and receiving end by wirelessly pass transmission of electricity platform mention
For the effective range of transmission can reach within two kms.And then, instruction is to be sent to data by serial ports by MCU to transmit mould
Block, that is, sent and received by wireless digital broadcasting station, by the mode of setting transmission and the parameter of work by data
It sends.The working principle of receiving end is similar.Voice broadcast module is that audio file is realized the sequence finished according to 001-007
It number is placed in SD card, audio sequence respectively corresponds each key serial number.It is real herein since the I/O port number of MCU is insufficient
So more interfaces is not needed in testing, therefore is not had to extension I/O port and connected voice broadcast module.Finally, the command information sent
It stores with the solicited message received into SD card, SD card is connected with MCU using SPI interface, is read by SPI mode
Data are write, working principle is as shown in Figure 3；Mobile power source is powered for whole process.
Claims (8)
1. a kind of field ad hoc network wireless telecommunication system, comprising modules are: keyboard input module, the processing of STM32 single-chip microcontroller
Module, wireless communication module, voice broadcast module, SD card memory module, mobile power source power supply.
2. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the key is defeated
Enter module, by lower button, circuit ground, current potential zero.
3. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the STM32 is mono-
Piece machine receives low level of the serial port circuit from keyboard input module, is handled information, sent, stored.
4. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the channel radio
Believe module, transmitting terminal receives the processed data of STM.32 single-chip microcontroller, spreads out of by antenna；Receiving terminal receives number by antenna
According to transferring data to STM32 single-chip microcontroller.
5. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the voice is broadcast
Module is reported, the data from STM32 single-chip microcontroller are received, broadcasts received information.
6. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the SD card is deposited
Module is stored up, traffic information is put into SD card according to 001 to 00N sequence, corresponds with key system, is mentioned by voice module
The information in SD card is taken, and is broadcasted.
7. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the mobile electricity
Source module can access mobile charging treasured with USB and be powered to whole system, easily replacement power supply.
8. a kind of field ad hoc network wireless telecommunication system design according to claim 1, it is characterised in that the channel radio
Believe module, based on the Lora communication technology, low-power consumption, strong real-time, transmission effective distance up to 2000 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187610.1A CN109068399A (en) | 2018-10-12 | 2018-10-12 | A kind of field ad hoc network wireless telecommunication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187610.1A CN109068399A (en) | 2018-10-12 | 2018-10-12 | A kind of field ad hoc network wireless telecommunication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109068399A true CN109068399A (en) | 2018-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811187610.1A Pending CN109068399A (en) | 2018-10-12 | 2018-10-12 | A kind of field ad hoc network wireless telecommunication system |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561397A (en) * | 2018-12-29 | 2019-04-02 | 苏州英诺迅科技股份有限公司 | A kind of remote-wireless voice-transmission system based on LoRa technology |
| CN111412787A (en) * | 2020-03-26 | 2020-07-14 | 湖南科技大学 | Thunder field rapid detection system based on L oRa dynamic ad hoc network |
-
2018
- 2018-10-12 CN CN201811187610.1A patent/CN109068399A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109561397A (en) * | 2018-12-29 | 2019-04-02 | 苏州英诺迅科技股份有限公司 | A kind of remote-wireless voice-transmission system based on LoRa technology |
| CN111412787A (en) * | 2020-03-26 | 2020-07-14 | 湖南科技大学 | Thunder field rapid detection system based on L oRa dynamic ad hoc network |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181221 |