CN110098846A - Wireless transceiver - Google Patents
Wireless transceiver Download PDFInfo
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- CN110098846A CN110098846A CN201810078580.4A CN201810078580A CN110098846A CN 110098846 A CN110098846 A CN 110098846A CN 201810078580 A CN201810078580 A CN 201810078580A CN 110098846 A CN110098846 A CN 110098846A
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The present invention proposes a kind of wireless transceiver, including data acquisition module, microcontroller, signal transmitting and receiving processing module and radio receiving transmitting module；Data collecting module collected sensor data signal；The data-signal that microcontroller passes through signal transmitting and receiving processing module output control signal control and receiving sensor, signal transmitting and receiving processing module receives control instruction signal by radio receiving transmitting module, and control signal will be exported after control instruction signal LoRa demodulation to microcontroller, the data-signal of data collecting module collected sensor is controlled and received by microcontroller；Signal transmitting and receiving processing module will also receive after data-signal carries out LoRa modulation to be emitted by radio receiving transmitting module.The wireless transceiver carries out LoRa modulation /demodulation to data-signal by signal transmitting and receiving processing module, realizes the data transmit-receive transmission of low-power consumption long range.Compared with traditional wireless data uploads mode, without using the network that operator provides, use cost is reduced.
Description
Technical field
The present invention relates to wireless datas to send and receive technical field, specifically, the present invention relates to a kind of wireless receiving and dispatchings
Device.
Background technique
It is higher and higher for the technical requirements of wireless communication with the development of Internet of Things, the especially nothing of sensing data
Line transmit-receive technology.The communication mode and the anti-of frequency modulation that conventional wireless transceiver hardware platform is demodulated using ordinary modulation are done
Technology is disturbed, main problem is that its communication distance is short, such as ZigBee technology.When there is stronger interference in application environment, transmitting-receiving
Success rate reduce, so as to cause the transmission packet loss of data.If using the network of operator, data every month upload there is also
The no small cost issues of number.
Summary of the invention
The purpose of the present invention is intended to provide a kind of wireless transceiver of long range transmitting-receiving transmission for realizing data.
The present invention provides following scheme:
A kind of wireless transceiver, including data acquisition module, microcontroller, signal transmitting and receiving processing module and wireless receiving and dispatching
Module；The data acquisition module is used to acquire the data-signal of sensor；The microcontroller is acquired with the data respectively
Module and signal transmitting and receiving processing module connection；The microcontroller is used to be exported according to the signal transmitting and receiving processing module
Control signal, control and receive the data-signal of the data collecting module collected sensor, and by the data-signal into
Output is to the signal transmitting and receiving processing module after row processing；The signal transmitting and receiving processing module and the radio receiving transmitting module connect
It connects；The signal transmitting and receiving processing module is used for through radio receiving transmitting module reception control instruction signal, and by the control
Command signal exports the control signal to the microcontroller after carrying out LoRa demodulation, controls and connects by the microcontroller
Receive the data-signal of the data collecting module collected sensor；The number that the signal transmitting and receiving processing module is also used to receive
It is believed that being emitted after number progress LoRa modulation by the radio receiving transmitting module.
The data acquisition module includes RS485 interface and interface control chip in one of the embodiments,；It is described to connect
Mouth control chip is connect with the microcontroller；The interface control chip is also connect with the RS485 interface；The RS485
Interface receives the data-signal of the sensor for connecting with the sensor；The interface control chip is according to described micro-
The control signal of controller output, the data-signal of the sensor is acquired by the RS485 interface.
The interface control chip is SP3485 chip in one of the embodiments,；The microcontroller passes through general
Serial line interface is connect with the SP3485 chip pin.
The RE foot of the SP3485 chip is set into high electricity when the microcontroller sends data in one of the embodiments,
It is flat；The RE foot of the SP3485 chip is set low into level when the microcontroller receives data.
The RS485 interface carries out data transmission using semiduplex communication mode and connects in one of the embodiments,
It receives.
The signal transmitting and receiving processing module includes SX1276 chip in one of the embodiments,.
It in one of the embodiments, further include power module；The power module is used for the microcontroller, described
Signal transmitting and receiving processing module and data acquisition module power supply.
The power module includes battery and LP5907MFX-3.3 chip in one of the embodiments,；It is described
LP5907MFX-3.3 chip is used to carry out pressure stabilizing to the output voltage of the battery.
The power module further includes charge controlling chip in one of the embodiments,；The charge controlling chip is used
In the electricity for detecting the supplying cell, the supplying cell is carried out when the electricity of the supplying cell reaches power threshold
Charge control.
The microcontroller is STM32L151 chip in one of the embodiments,.
Above-mentioned wireless transceiver, signal transmitting and receiving processing module will be defeated after the control instruction signal received progress LoRa demodulation
Control signal controls the data-signal of data collecting module collected sensor by microcontroller to microcontroller out.Meanwhile it is micro-
Controller sends the data-signal received to signal transmitting and receiving processing module, and signal transmitting and receiving processing module carries out data-signal
It is sent after LoRa modulation by radio receiving transmitting module.LoRa modulation is carried out to data-signal by signal transmitting and receiving processing module
Demodulation, so that the wireless transceiver realizes the data transmit-receive transmission of long range.It is therefore not necessary to the net provided using operator
Network can be realized the wireless receiving and dispatching communication of long range, reduce use cost.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural block diagram in an a kind of embodiment of wireless transceiver provided by the invention；
Fig. 2 is the circuit structure block diagram in an a kind of embodiment of wireless transceiver provided by the invention；
Fig. 3 is the structural schematic diagram of the microcontroller in a kind of wireless transceiver provided by the invention；
Fig. 4 is the structural schematic diagram of SP3485 chip provided by the invention；
Fig. 5 is the schematic diagram in the circuit RF provided by the invention；
Fig. 6 is the structural schematic diagram of LP5907MFX-3.3 chip provided by the invention；
Fig. 7 is the structural schematic diagram of TT8018 chip provided by the invention；
Fig. 8 is the structural schematic diagram of battery provided by the invention；
Fig. 9 is Micro_USB interface structure schematic diagram provided by the invention；
Figure 10 is SIP_2P54_4 structural schematic diagram provided by the invention；
Figure 11 is SIP_2P54_5 structural schematic diagram provided by the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Fig. 1 is the structural block diagram of the wireless transceiver in one embodiment of the invention.As shown in Figure 1, the wireless transceiver packet
Include data acquisition module 100, microcontroller 200, signal transmitting and receiving processing module 300 and radio receiving transmitting module 400, power module
500。
Data acquisition module 100 is used to acquire the data-signal of sensor 10.Microcontroller 200 respectively with data acquisition module
Block 100 and signal transmitting and receiving processing module 300 connect.Microcontroller 200 receives the control that signal transmitting and receiving processing module 300 exports
Signal, and according to the data-signal of the control signal control data acquisition module 100 acquisition sensor 10.Microcontroller 200 is also
The data-signal of the collected sensor 10 of acquisition module 100 for receiving data, and given being exported after data-signal processing
Signal transmitting and receiving processing module 300.Meanwhile microcontroller 200 is in the control for being not received by the output of signal transmitting and receiving processing module 300
When signal, according to the capture program of inside setting, acquisition control signal is exported, control data acquisition module 100 acquires sensor
10 data information.Further, the data information for the sensor 10 that data acquisition module 100 exports is received, and by the data
Output is to signal transmitting and receiving processing module 300 after information is handled.
Signal transmitting and receiving processing module 300 is also connect with radio receiving transmitting module 400.Signal transmitting and receiving processing module 300, which has, to be connect
It receives signal processing model and sends two kinds of operating modes of signal processing model.Signal transmitting and receiving processing module 300, which is in, receives signal
When tupe, LoRa demodulation is carried out to by 400 received signal of radio receiving transmitting module.At signal transmitting and receiving processing module 300
When sending signal processing model, after LoRa modulation being carried out from received signal in microcontroller 200, pass through wireless receiving and dispatching mould
Block 400, which is sent, to be uploaded.Signal transmitting and receiving processing module 300 receives the control instruction that server issues by radio receiving transmitting module 400
Signal, and control signal is exported to microcontroller 200, so that microcontroller after the control instruction signal is carried out LoRa demodulation
200 acquire the data-signal of sensor 10 according to the control signal control data acquisition module 100.Wherein, server issues
Control instruction signal can be the instruction that control wireless transceiver 20 acquires 10 data-signal of sensor.Specifically, which refers to
Signal is enabled to may also include the frequency acquisition signal that control data acquisition module 100 acquires 10 data-signal of sensor, so that
The frequency and server process of 10 data-signal of sensor of the upload of wireless transceiver 20 data-signal match.Meanwhile believing
Number transmitting-receiving process module 300 carries out the data-signal when receiving 10 data-signal of sensor of the output of microcontroller 200
After LoRa modulation, corresponding server is sent to by radio receiving transmitting module 400.
The control instruction signal received is carried out LoRa solution by above-mentioned wireless transceiver 20, signal transmitting and receiving processing module 300
Control signal is exported after tune to microcontroller 200, and data acquisition module 100 is controlled by microcontroller 200 and acquires sensor 10
Data-signal.Meanwhile microcontroller 200 sends the data-signal received to signal transmitting and receiving processing module 300, signal is received
Hair processing module 300 will be sent after data-signal progress LoRa modulation by radio receiving transmitting module 400.Pass through signal transmitting and receiving
Processing module 300 carries out LoRa modulation /demodulation to data-signal, so that the wireless transceiver 20 realizes the data of long range
Transmitting-receiving transmission.It is therefore not necessary to which the network provided using operator, can be realized the wireless receiving and dispatching communication of long range, reducing makes
Use cost.
In the present embodiment, power module 500 to microcontroller 200, signal transmitting and receiving processing module 300 and data for adopting
Collect module 100 to power.Further, power module 500 is powered to each electrical component of entire wireless transceiver 20.Power supply mould
Block 500 includes battery and LP5907MFX-3.3 chip and charge controlling chip.LP5907MFX-3.3 chip is used for battery
Output voltage carry out pressure stabilizing.Charge controlling chip is used to detect the electricity of supplying cell, reaches electricity in the electricity of supplying cell
Charge control is carried out to supplying cell when measuring threshold value.Meanwhile microcontroller 200 also carries out electricity control, root to power module 500
It charges according to the power consumption condition control power module 500 of each component in wireless transceiver 20 to each component, to reduce wireless
The power consumption of transceiver 20.
In the present embodiment, as shown in Fig. 2, data acquisition module 100 includes RS485 interface and interface control chip.Its
In, interface control chip is SP3485 chip.Microcontroller 200 is STM32L151 chip.Signal transmitting and receiving processing module 300 is wrapped
Include SX1276 chip.In power module 500, LP5907MFX-3.3 chip is voltage stabilizing chip, and control battery exports stable voltage
Signal.Battery is 3.3V battery, and charge controlling chip is TT8018 chip.Specifically, power module 500 includes chargeable electricity
Pond carries out pressure stabilizing by battery of the LP5907MFX-3.3 chip to powered operation.Work as dead battery capability, can pass through 5V's
Micro USB port charges the battery, and charges the battery control by TT8018 chip.
The pin of SP3485 chip is connect with the Universal Serial Interface of STM32L151 chip.SP3485 chip also with RS485
Interface connection.RS485 interface with sensor 10 for connecting, the data-signal of receiving sensor 10.SP3485 chip and RS485
The external tapping of interface connects, and according to the control signal that STM32L151 chip exports, acquires the data-signal of sensor 10.Specifically
Ground, SP3485 chip are connect with the A interface and B interface of RS485 interface.The agreement that RS485 interface uses is Modbus agreement.
The data communication mode of RS485 receiving module is semiduplex communication mode, so that receiving data and sending data in difference
Moment carries out.When being received in order to which setting is specific out of RS485 interface successful data reception signal, STM32L151 chip
Between, SP3485 chip is controlled according to specific receiving time and passes through the data-signal of RS485 receiving module acquisition sensor 10.
When STM32L151 chip sends data to SP3485 chip, the RE foot of SP3485 chip is set into high level.
When STM32L151 chip receives data from SP3485 chip, the RE foot of SP3485 chip is set low into level.SX1276 chip from
Signal is received in STM32L151 chip, and is emitted by antennal interface after signal progress LoRa modulation.Meanwhile
SX1276 chip receives signal from antennal interface, and carries out LoRa demodulation to the signal.
As shown in Fig. 2, in the present embodiment, wireless transceiver 20 further includes crystal oscillator and its matched circuit.Crystal oscillator and its
Matched circuit guarantees the consistency of frequency in the stability and work of system centre frequency, the communicativeness of synchronous raising system
Energy.
Wireless transceiver described in above-described embodiment can obtain the data of sensor according to different reading data commands, then
The data of acquisition are packaged by microcontroller and are uploaded.Also, the wireless transceiver can periodically read the data of sensor, also can
Reading instruction is enough issued by server and gives the wireless transceiver, to read the data of RS485 interface sensor.
Compared with prior art, it is the advantages of wireless transceiver of the present invention: long transmission distance, wireless receiving and dispatching
Communication distance between device and base station can achieve 10 kilometers, can reach 15 kilometers in spacious region；CFS center frequency stabilization
Strong antijamming capability, receiving sensitivity are high；Working band is wider, near 433MHz, 470MHz, 868MHz, 900MHz frequency point
Frequency range in performance indexes have the guarantee of reliability；Maximum transmission power 17dBm；Operating quiescent current is down to 1.5uA；
Receiving sensitivity -141dBm；With RS485 interface, the sensor of RS485 interface or Modbus agreement can be connected；It is wireless to receive
It is small in size to send out device, the whole size without antenna is 85mm × 57mm；There is traditional FSK/GFSK communication pattern and expansion simultaneously
Frequency mode, possessed communication distance and the transmitting-receiving bit error rate are significantly improved compared with the performance of FSK communication pattern under spread spectrum mode,
There is apparent advantage under the transmission situation of low rate, be suitable for interference by force, environment is complicated, number of nodes is more, it is logical over long distances to require
The products such as collector, the concentrator of letter.
In the present embodiment, all parts structural reference figure of wireless transceiver 20 is as shown in Fig. 3-11.Microcontroller 200
On have pin, SPI interface, RESET pin and the other pins of USART interface.Signal transmitting and receiving processing module 300 can sent out
LoRa modulation is carried out to transmitting signal when penetrating signal processing model and reception signal is carried out when receiving signal processing model
LoRa demodulation.SP3485 control chip is connected with the external interface of microcontroller 200 and RS485 interface respectively, PA8 control pipe
Foot control RS485 interface data sends and receives.Antennal interface improves the transmitting gain of signal, increases transmission range.
Specifically, microcontroller is STM32L151 chip.The pin of STM32L151 chip is handled with signal transmitting and receiving respectively
Module, SP3485 chip are connected.Signal transmitting and receiving processing module be SX127X chip, SX127X chip can to receive signal into
Row LoRa is demodulated or is modulated to the signal of transmission.Herein, wherein SX127X chip indicates a serial chip, including
SX1276 chip or SX1278 chip.
PB0 pin and PB1 pin the selection SX127X chip data of STM32L151 chip send and receive mode, PA4 pipe
Foot, PA5 pin, PA6 pin, PA7 pin are used for transmission the data between two chips.PF0 pin, the PF1 of STM32L151 chip
Pin connects 8MHz crystal oscillator.PA9 pin, the reception data pins that PA10 pin definitions are universal serial port and transmission data pins.
Wherein PA8 pin is connected with SP3485 chip pin 2, pin 3, and PA9 pin is connect with SP3485 chip pin 1.PA10 pipe
Foot is connected as set pin with SP3485 chip pin 4, by setting high level the RS485 of SP3485 chip controls is connect
Mouth sends state in data, sets low level and the RS485 interface of SP3485 chip controls is made to be in data receiving state, pass through
PA8 pin can realize the reset of functions of modules.The pin 6 and pin 7 of SP3485 chip connect the resistance in 360 Europe respectively, make
For the A interface and B interface of RS485 interface, for receiving the data of RS485 electrical specification of interface, user can be by this mould
Block receives the sensing data of multiple RS485 electrical specification of interface, thus avoid wire transmission need to spread line transmission caused by construction,
The problems such as expense.
Wireless transceiver 20 includes that Liang Zhong working mechanism is:
A kind of mode is: microcontroller 200 sends control command, and the data format set by RS485 interface is sent
To sensor 10, after sensor 10 uploads a data, certain interval of time, microcontroller 200 sends control command again,
The data of next sensor 10 are obtained, are so repeated until reading all sensing datas.Microcontroller 200 will be read
The data taken are loaded into required frequency range after being packaged by LoRa modulation system, are sent in the form of an electromagnetic wave and by Internet of Things
Base station is netted to receive.Another way is that control command is issued using server to wireless transceiver 20, signal transmitting and receiving processing module
300 receive control command, and carry out LoRa demodulation.Decoding data will be controlled by SP3485 chip controls RS485 interface again
Order is sent to sensor 10, and the parameter of the collected surrounding enviroment of sensor 10 is obtained after certain interval of time.Microcontroller
Data are packaged and carry out LoRa modulation by signal transmitting and receiving processing module 300 by 200, and signal transmitting and receiving processing module 300 modulate
Data be sent to base station.
Compared with traditional communication technology, wireless transceiver 20 of the invention has merged digital spread spectrum, Digital Signal Processing
With forward error correction coding technology, solves the problems, such as the pain spot needed in communication range, anti-interference ability and power consumption, have logical
Believe the superior functions such as wide range, strong antijamming capability, low in energy consumption.In digital well, the change of spreading factor be can change
The rate and data volume of communication.
Specific embodiment described herein is only the illustration for present subject matter.Technology belonging to the present invention
The technical staff in field can carry out different types of modification or supplement to described specific embodiment or using similar
Mode substitute, but do not deviate by purport of the invention or beyond the scope of the appended claims.
Similar microcontroller, signal transmitting and receiving processing module, data acquisition module, antenna has more been used to connect herein
Mouthful, the terms such as crystal oscillator and match circuit, power input, but a possibility that be not precluded using other terms.Use the above art
Language is construed as any additional limitation just for the sake of that can be more convenient to describe and explain essence of the invention
It is all to be disagreed with present subject matter.
The above is only some embodiments of the invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of wireless transceiver, which is characterized in that including data acquisition module, microcontroller, signal transmitting and receiving processing module with
And radio receiving transmitting module；
The data acquisition module is used to acquire the data-signal of sensor；
The microcontroller is connect with the data acquisition module and the signal transmitting and receiving processing module respectively；The microcontroller
Device is used for the control signal exported according to the signal transmitting and receiving processing module, controls and receives the data collecting module collected biography
The data-signal of sensor, and export after the data-signal is handled to the signal transmitting and receiving processing module；
The signal transmitting and receiving processing module is connect with the radio receiving transmitting module；The signal transmitting and receiving processing module is for passing through institute
It states radio receiving transmitting module and receives control instruction signal, and export the control after the control instruction signal is carried out LoRa demodulation
Signal gives the microcontroller, and the data of the data collecting module collected sensor are controlled and received by the microcontroller
Signal；The signal transmitting and receiving processing module be also used to by the data-signal received carry out LoRa modulation after by the wireless receipts
Hair module is emitted.
2. wireless transceiver according to claim 1, which is characterized in that the data acquisition module includes RS485 interface
And interface control chip；The interface control chip is connect with the microcontroller；The interface control chip also with it is described
The connection of RS485 interface；The RS485 interface receives the data-signal of the sensor for connecting with the sensor；It is described
The control signal that interface control chip is exported according to the microcontroller acquires the sensor by the RS485 interface
Data-signal.
3. wireless transceiver according to claim 2, which is characterized in that the interface control chip is SP3485 chip；
The microcontroller is connect by Universal Serial Interface with the SP3485 chip pin.
4. wireless transceiver according to claim 3, which is characterized in that the microcontroller will be described when sending data
The RE foot of SP3485 chip sets high level；The RE foot of the SP3485 chip is set low into electricity when the microcontroller receives data
It is flat.
5. wireless transceiver according to claim 2, which is characterized in that the RS485 interface uses semiduplex communication
Mode carries out data and sends and receives.
6. wireless transceiver according to claim 1, which is characterized in that the signal transmitting and receiving processing module includes SX1276
Chip.
7. wireless transceiver according to claim 1, which is characterized in that further include power module；The power module is used
In to the microcontroller, the signal transmitting and receiving processing module and data acquisition module power supply.
8. wireless transceiver according to claim 7, which is characterized in that the power module include battery and
LP5907MFX-3.3 chip；The LP5907MFX-3.3 chip is used to carry out pressure stabilizing to the output voltage of the battery.
9. wireless transceiver according to claim 8, which is characterized in that the power module further includes charge control core
Piece；The charge controlling chip is used to detect the electricity of the supplying cell, reaches electricity threshold in the electricity of the supplying cell
Charge control is carried out to the supplying cell when value.
10. wireless transceiver according to claim 1, which is characterized in that the microcontroller is STM32L151 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078580.4A CN110098846A (en) | 2018-01-26 | 2018-01-26 | Wireless transceiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078580.4A CN110098846A (en) | 2018-01-26 | 2018-01-26 | Wireless transceiver |
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| CN110098846A true CN110098846A (en) | 2019-08-06 |
Family
ID=67441793
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| CN201810078580.4A Pending CN110098846A (en) | 2018-01-26 | 2018-01-26 | Wireless transceiver |
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| CN113645583A (en) * | 2021-08-06 | 2021-11-12 | 安徽徽宁电器仪表集团有限公司 | Thermocouple or thermal resistor wireless transmission system |
| CN114070347A (en) * | 2020-07-28 | 2022-02-18 | 珠海深圳清华大学研究院创新中心 | LoRa communication method and device |
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Application publication date: 20190806 |
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