CN208015773U - A kind of Internet of Things communication module based on the LoRa communication technologys - Google Patents
A kind of Internet of Things communication module based on the LoRa communication technologys Download PDFInfo
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- CN208015773U CN208015773U CN201820535443.4U CN201820535443U CN208015773U CN 208015773 U CN208015773 U CN 208015773U CN 201820535443 U CN201820535443 U CN 201820535443U CN 208015773 U CN208015773 U CN 208015773U
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Abstract
The utility model discloses a kind of Internet of Things communication modules based on the LoRa communication technologys, including MCU, the wireless receiving and dispatching processor based on the LoRa communication technologys, wireless transmission matched filtering circuit, radio frequency controlled switch and antenna；The communication port of MCU is connect with the communication port of wireless receiving and dispatching processor, and the control signal output of MCU is connect with the control signal input of the radio frequency controlled switch, for controlling radio frequency controlled switch emission state or reception state；One end of wireless transmission matched filtering circuit is connect with the signal output end of wireless receiving and dispatching processor, the signal input part connection of the other end and radio frequency controlled switch；Radio frequency controlled switch is connect with antenna；Wireless transmission matched filtering circuit is the electric network that capacitance and inductance form；The utility model wireless transmission matched filtering circuit is by the capacitance and inductance of certain amount and numerical value, and enhancing wireless transmission matched filtering circuit is for the filtration result of band stray, the band stray of reduction wireless receiving and dispatching output signal of processor.
Description
" technical field "
The utility model is related to Internet of Things field of communication technology more particularly to a kind of Internet of Things based on the LoRa communication technologys
Communication module.
" background technology "
Internet of Things is the important component of generation information technology, and the important development stage in " informationization " epoch.
Internet of Things is the connected internet of object object, and the core of Internet of Things and basis are still internet, and Internet of Things is in Internet basic
On extension and extension network, Internet of Things user terminal extend and extend between any article and article, into row information hand over
It changes and communicates, that is, object object mutually ceases.The wireless connection technology that Internet of Things uses includes WiFi, Bluetooth, ZigBee, NB-
IoT and LoRa etc..
Wherein, LoRa (full name is " long range ") is that (full name is " low-power Wide-Area to LPWAN
Network ") one kind in the communication technology is that Semtech companies of the U.S. use and promote a kind of super remote based on spread spectrum
Range wireless transmission scheme.This scheme changes considered mode about the compromise of transmission range and power consumption in the past, had transmission
Distance is remote, and low in energy consumption, ad hoc network function is strong, it is at low cost the features such as.
Notification number is that the utility model patent of CN206757867U discloses a kind of intelligent meter wireless communication module, to improve
The communication distance of radio meter register and the success rate for improving meter reading.The intelligent meter wireless communication module of the utility model includes：Through string
The MCU that mouth is connect with intelligent meter, the MCU are connect with the wireless receiving and dispatching processor based on LoRa, the wireless receiving and dispatching processor
Two-way impedance matching filtering circuit, respectively wireless transmission impedance matching filter circuit are connected between radio frequency controlled switch
With wireless receiving matched filtering circuit, wireless receiving and dispatching filter circuit is connected between the radio frequency controlled switch and antenna；It is described
Wireless communication module further includes the power-switching circuit being connect with intelligent meter, described for being converted to the electricity taken from intelligent meter
The operating voltage and operating current of MCU and wireless receiving and dispatching processor.
Although above-mentioned patent can by LoRa technologies realize intelligent meter long range wireless communication, there are still with
Lower problem：Wireless transmission impedance matching filter circuit can not effectively filter out band stray, so that band stray is up to state standards with
Under, there are larger deviations for the real output of wireless receiving and dispatching processor and theoretical output power.
" utility model content "
The utility model is combined as a kind of hardware device with control software, is provided a kind of based on the LoRa communication technologys
Internet of Things communication module, reduce wireless receiving and dispatching processor signal output end output signal band stray, make wireless receiving and dispatching
The close theoretical output power of the real output of processor.The utility model is realized in this way：
A kind of Internet of Things communication module based on the LoRa communication technologys, including MCU, the wireless receipts based on the LoRa communication technologys
Send out processor, wireless transmission matched filtering circuit, radio frequency controlled switch and antenna；The communication port of the MCU and the nothing
The communication port of line transmitting-receiving process device connects, and the control signal output of the MCU and the control of the radio frequency controlled switch are believed
The connection of number input terminal, emission state or reception state are in for controlling the radio frequency controlled switch；The wireless transmission matching
One end of filter circuit is connect with the signal output end of the wireless receiving and dispatching processor, the other end and the radio frequency controlled switch
Signal input part connects；The radio frequency controlled switch is connect with the antenna；The wireless transmission matched filtering circuit includes the
One capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th capacitance, the first electricity
Sense, the second inductance, third inductance and the 4th inductance；
The signal output end of the wireless receiving and dispatching processor is connect with one end of the 4th inductance；4th inductance
The other end is connect with one end of one end of the third inductance, one end of the 5th capacitance and the 6th capacitance respectively,
The other end of the third inductance respectively with one end of the 7th capacitance, one end of the 8th capacitance and the wireless receipts
The output end of stabilized voltage supply connection of processor is sent out, the other end of the 5th capacitance is connect with one end of second inductance, institute
The other end for stating the second inductance is connect with one end of one end of first inductance, the third capacitance respectively, first electricity
The other end of sense is connect with one end of the signal input part of the radio frequency controlled switch, first capacitance respectively, and described second
Capacitance and first inductance in parallel；4th capacitance and second inductance in parallel；The other end of first capacitance, institute
State the other end of third capacitance, the other end of the 6th capacitance, the other end of the 7th capacitance and the 8th capacitance
The other end ground connection.
Further, the capacitance of first capacitance is 4.7pF；The capacitance of second capacitance is 0.75pF；Institute
The capacitance for stating third capacitance is 12pF；The capacitance of 4th capacitance is 2.7pF；The capacitance of 5th capacitance is
18pF；The capacitance of 6th capacitance is 15pF；The capacitance of 7th capacitance is 47pF；The capacitance of 8th capacitance
Value is 0.01uF；The inductance value of first inductance is 15nH；The inductance value of second inductance is 12nH；The third inductance
Inductance value be 33nH；The inductance value of 4th inductance is 1.5nH.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes screening cover；The screening cover
It covers on the wireless receiving and dispatching processor.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes wireless receiving matched filtering electricity
Road；One end of the wireless receiving matched filtering circuit is connect with the signal output end of the radio frequency controlled switch, the other end with
The signal input part of the wireless receiving and dispatching processor connects；The wireless receiving matched filtering circuit includes the 9th capacitance, the tenth
Capacitance, the 5th inductance and the 6th inductance；The signal output end of the radio frequency controlled switch and one end of the 9th capacitance connect
It connects；The other end of 9th capacitance is connect with one end of one end of the 5th inductance and the tenth capacitance respectively, institute
State the other end of the 5th inductance one end with the signal input part of the wireless receiving and dispatching processor and the 6th inductance respectively
Electrical connection；The other end of tenth capacitance and the 6th inductance is grounded.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes wireless receiving and dispatching filter circuit；
One end of the wireless receiving and dispatching filter circuit is connect with the sending and receiving end of the radio frequency controlled switch, and the other end connects with the antenna
It connects；The wireless receiving and dispatching filter circuit includes the 19th capacitance, the 20th capacitance, the 21st capacitance and the 7th inductance；Institute
Antenna is stated to connect with one end of one end of the 7th inductance and the 19th capacitance respectively, the 7th inductance it is another
End is connect with one end of one end of the 20th capacitance and the 21st capacitance respectively, the 21st capacitance
The other end is connect with the sending and receiving end of the wireless receiving and dispatching processor, the other end of the 19th capacitance and the 20th electricity
The other end of appearance is grounded.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes two ESD being connected in parallel
Diode；One end of described two ESD diodes being connected in parallel is grounded, and the other end is connect with antenna.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes interface circuit；The interface
Circuit is connect with the MCU；The interface circuit includes for being connect with terminal device master control borad or concentrator master control borad
UART interface.
Further, the UART interface includes the single straight cutting needles of 8PIN and 8PIN patch pads.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes power circuit；The power supply
Circuit is connect with the MCU and wireless receiving and dispatching processor respectively, for being carried to the MCU and the wireless receiving and dispatching processor
Power supply source.
Further, the chip model that the MCU is used is HRP506FHNK.
Further, the Internet of Things communication module based on the LoRa communication technologys further includes the crystal oscillator of 26MHZ；It is described
The crystal oscillator of 26MHZ is connect with the wireless receiving and dispatching processor.
The beneficial effects of the utility model：
The utility model reduces by first by the second capacitance in parallel on the first inductance of wireless transmission matched filtering circuit
The impedance of inductance increases the capacitive reactance of the first inductance, enhances filtration result of the wireless transmission matched filtering circuit for band stray,
The band stray of wireless receiving and dispatching output signal of processor is reduced, the real output of wireless receiving and dispatching processor is defeated closer to theory
Go out power.Further, the utility model is by adjusting the first capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th electricity
Hold, the capacitance of the 6th capacitance, the 7th capacitance and the 8th capacitance, the first inductance, the second inductance, third inductance and the 4th electricity
The inductance value of sense, enhancing wireless transmission matched filtering circuit reduce wireless receiving and dispatching processor for the filtration result of band stray
The band stray of output signal makes the band stray of wireless receiving and dispatching output signal of processor in national standard hereinafter, wireless receiving and dispatching
The close theoretical output power of the real output of processor；Further, the utility model is by giving wireless receiving and dispatching processor
Screening cover on cover, larger reduces the band stray of wireless receiving and dispatching output signal of processor, and the reality of wireless receiving and dispatching processor is defeated
Go out power closer to theoretical output power.Further, the utility model by RF switch and wireless receiving and dispatching processor it
Between connect wireless receiving matched filtering circuit, can filter out input wireless receiving and dispatching processor signal band stray.Further
Ground, the utility model can filter out antenna hair by connecting wireless receiving and dispatching filter circuit between radio frequency controlled switch and antenna
Give the signal of radio frequency controlled switch band stray and radio frequency controlled switch be sent to antenna signal band stray.
" description of the drawings "
In order to illustrate more clearly of the utility model embodiment, attached drawing needed in the embodiment is done simply below
Introduction.The accompanying drawings in the following description is only the embodiments of the present invention, is come for those of ordinary skill in the art
It says, without creative efforts, can also be obtained according to these attached drawings other accompanying drawings.
Fig. 1 is the overall schematic of the utility model；
Fig. 2 is the pinouts of the utility model MCU；
Fig. 3 is the utility model wireless receiving and dispatching processor, wireless transmission matched filtering circuit, wireless receiving matched filtering electricity
The circuit diagram on road；
Fig. 4 is the circuit diagram of the utility model RF switch, wireless receiving and dispatching filter circuit and antenna.
" specific implementation mode "
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order to make the purpose of this utility model, technical solution, advantage be more clearly understood, with reference to the accompanying drawings and embodiments
The present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain this
Utility model is not used to limit the utility model.
As shown in Figure 1, a kind of Internet of Things communication module based on the LoRa communication technologys includes interface circuit, MCU, is based on
The wireless receiving and dispatching processor of the LoRa communication technologys, wireless transmission matched filtering circuit, wireless receiving matched filtering circuit, wireless receipts
Send out filter circuit, radio frequency controlled switch, antenna, power circuit and crystal oscillator.As shown in Figure 1, interface circuit is connect with MCU, MCU
Communication port connect with the communication port of wireless receiving and dispatching processor, for being communicated with wireless receiving and dispatching processor；The control of MCU
The control signal input of signal output end and radio frequency controlled switch processed connects, and emitting shape is in for controlling radio frequency controlled switch
State or reception state；One end of wireless transmission matched filtering circuit is connect with the signal output end of wireless receiving and dispatching processor, another
End is connect with the signal input part of radio frequency controlled switch；The letter of one end and radio frequency controlled switch of wireless receiving matched filtering circuit
The connection of number output end, the other end are connect with the signal input part of wireless receiving and dispatching processor；One end of wireless receiving and dispatching filter circuit with
The sending and receiving end of radio frequency controlled switch connects, and the other end is connect with antenna；Power circuit respectively with MCU and wireless receiving and dispatching processor
Connection, power supply is provided for MCU and wireless receiving and dispatching processor.
The wireless receiving and dispatching processor, wireless transmission matched filtering circuit, wireless receiving matched filtering circuit, wireless receiving and dispatching
Filter circuit, radio frequency controlled switch and antenna form radio circuit.
In the present embodiment, MCU is communicated by interface circuit with terminal device master control borad or concentrator master control borad.Eventually
End equipment master control borad/concentrator master control borad sends the data to MCU by interface circuit, and data are passed through radio circuit by MCU again
It is wirelessly transmitted in the air, or, the air-data received from radio circuit is sent to terminal device master by MCU by interface circuit
Control plate/concentrator master control borad.Terminal device master control borad or concentrator master control borad are using instruction and GPIO (General Purpose
Input Output, universal input/output) dynamic control MCU in real time.Wherein, terminal device refers to water, air and heat and electric power
The equipment such as industry radio meter register；Concentrator (concentrator device) is in connection terminal, computer or communication equipment
The heart connects point device.
In the present embodiment, interface circuit includes the UART for being connect with terminal device master control borad or concentrator master control borad
Interface.In the present embodiment, UART interface can be selected including the single straight cutting needles of 8PIN and 8PIN patch pads, operator simultaneously
Direct insertion or patch welding two ways is selected to connect MCU with terminal device master control borad or concentrator master control borad.Wherein, UART is
A kind of Universal Serial Bus is used for asynchronous communication.The bus two-way communication, may be implemented full duplex transmission and reception.
As shown in Fig. 2, in the present embodiment, the chip model that MCU is used is HRP506FHNK.HRP506FHNK is not only
The general MCU chip of a high integration is internally integrated 32 ARM Cortex-M0CPU kernels, multiple 16 and 32 bit timings
Device/counter, the UART modules with infrared transmission modulation function, the communication interface of compatible 7816 agreements, SPI and I2C communicate mould
Block, band real-time clock module RTC are supported to stop aobvious and flashing function LCD drive modules, 12 ADC, and are used for system power supply
The peripheral hardwares such as the LVD modules of monitoring, when operator is needed using related peripherals, need not external related peripherals again, only need by
The peripheral hardware that HRP506FHNK is internally integrated accesses circuit, and the internal clocking of HRP506FHNK is more accurate, operator
Clocks of the high/low frequency RC clock sources H/LRC as MCU inside HRP506FHNK can be directly selected, when need not be external again
Clock reduces power consumption and cost.In other embodiments, HRP506FHNK can reserve the welding position of external clock, facilitate behaviour
Author welds external clock.
As shown in Fig. 2, in the present embodiment, the communication port 10,11,12,13 of MCU respectively with wireless receiving and dispatching processor
Communication port 19,16,17,18 connects, and realizes the communication of MCU and wireless receiving and dispatching processor.As shown in Fig. 2, in the present embodiment,
The communication port of MCU is SPI (serial peripheral interface, Serial Peripheral Interface), and MCU is logical by SPI
Letter port sends the data to wireless receiving and dispatching processor, then converts the data into electromagnetic wave by wireless receiving and dispatching processor, or, wirelessly
Electromagnetic wave is converted into being sent to MCU by SPI communication port after data by transmitting-receiving process device.
As shown in Fig. 2, MCU further includes debugging port 7,14,15,16 and 17.Such as Fig. 2, shown in 3, in the present embodiment,
To the pin 15 of MCU, the pin 10 of wireless receiving and dispatching processor sends data to 9 tranmitting data register of pin of wireless receiving and dispatching processor
The pin 14 of MCU, the pin 16 and pin 7 of MCU are sent respectively in the clock and/or data exception of wireless receiving and dispatching processor
Pin 8 and pin 11 of the interrupt signal to wireless receiving and dispatching processor；Such as Fig. 2, shown in 3, the pin 17 of MCU can and wireless receiving and dispatching
The pin 7 of processor connects, for making wireless receiving and dispatching processor reset.
As shown in figure 3, in the present embodiment, the chip model that wireless receiving and dispatching processor uses is SX1278；SX1278 is
A kind of chip based on the LoRa communication technologys is a kind of core based on 1GHz ultra long haul low power consumption data transmission technologys below
Piece.The LoRa communication technologys are a kind of novel spread spectrums, have remote, low-power consumption (battery life is long), multinode, it is low at
This characteristic.The LoRa communication technologys mainly run (i.e. unauthorized frequency range) in global free frequency range, including 433,868,915MHz
Deng, have long transmission distance, low in energy consumption, ad hoc network function is strong, it is at low cost the features such as.
The wireless receiving and dispatching processor of the utility model can provide continuous radio frequency operation frequency range, and can be according to wireless environment
Automatic frequency-hopping is carried out to minimum frequency range is interfered to frequency range, reaches optimal communication effect, realizes telecommunication, user's reality is provided
The hardware platform of existing complex communication is supported.
As shown in figure 4, in the present embodiment, the chip model that radio frequency controlled switch uses is AS179.Such as Fig. 2, shown in 4,
One control signal input of radio frequency controlled switch receives control signal RF_SW1, another control signal input receives control
Signal RF_SW2 processed, wherein control signal RF_SW1 and control signal RF_SW2 is the control that MCU is sent to radio frequency controlled switch
Signal.
In the present embodiment, signal RF_SW1 is 1 and when signal RF_SW2 is 0, and radio frequency controlled switch is in emission state,
I.e. the signal of wireless transmission matched filtering circuit output is sent to wireless receiving and dispatching filter circuit by radio frequency controlled switch, and then is sent
To antenna；When signal RF_SW1 is 0 and signal RF_SW2 is 1, radio frequency controlled switch is in reception state, i.e. radio frequency controlled switch
The signal that antenna is sent to wireless receiving and dispatching filter circuit is output to wireless receiving matched filtering circuit, and then is output to wireless receipts
Send out processor.
As shown in figure 3, wireless transmission matched filtering circuit includes the first capacitance C1, the second capacitance C2, third capacitance C3, the
Four capacitance C4, the 5th capacitance C5, the 6th capacitance C6, the 7th capacitance C7, the 8th capacitance C8, the first inductance L1, the second inductance L2,
Three inductance L3 and the 4th inductance L4.
As shown in figure 3, the signal output end of wireless receiving and dispatching processor is connect with one end of the 4th inductance L4, the 4th inductance L4
The other end connect respectively with one end of third inductance L3, one end of the 5th capacitance C5 and one end of the 6th capacitance C6, third
The other end of inductance L3 respectively with one end, one end of the 8th capacitance C8 and the voltage stabilizing of wireless receiving and dispatching processor of the 7th capacitance C7
Power output end connects, and the other end of the 5th capacitance C5 is connect with one end of the second inductance L2, the other end point of the second inductance L2
It is not connect with one end of one end of the first inductance L1, third capacitance C3, the other end of the first inductance L1 is opened with radio frequency control respectively
One end connection of the signal input part of pass, the first capacitance C1, the second capacitance C2 are in parallel with the first inductance L1；4th capacitance C4 and
Two inductance L2 are in parallel；The other end of first capacitance C1, the other end of third capacitance C3, the other end of the 6th capacitance C6, the 7th electricity
Hold the other end of C7 and the other end ground connection of the 8th capacitance C8.
Compared to documents, it is parallel with the second capacitance C2 on the first inductance L1 of the present embodiment, reduces the first inductance L1's
Impedance increases the capacitive reactance of the first inductance L1, and then enhances filtration result of the wireless transmission matched filtering circuit for band stray,
The band stray for reducing wireless receiving and dispatching output signal of processor keeps the real output of wireless receiving and dispatching processor defeated close to theory
Go out power.
In other embodiments, the Internet of Things communication module based on the LoRa communication technologys further includes shielding case.It is described
Shielding case covers on wireless receiving and dispatching processor, larger reduces the band stray of wireless receiving and dispatching output signal of processor, makes wireless
The closer theoretical output power of the real output of transmitting-receiving process device.
In the present embodiment, the capacitance of the first capacitance C1 is 4.7pF；The capacitance of second capacitance C2 is 0.75pF；The
The capacitance of three capacitance C3 is 12pF；The capacitance of 4th capacitance C4 is 2.7pF；The capacitance of 5th capacitance C5 is 18pF；The
The capacitance of six capacitance C6 is 15pF；The capacitance of 7th capacitance C7 is 47pF；The capacitance of 8th capacitance C8 is 0.01uF；The
The inductance value of one inductance L1 is 15nH；The inductance value of second inductance L2 is 12nH；The inductance value of third inductance L3 is 33nH；4th
The inductance value of inductance L4 is 1.5nH.
The utility model is by by the first capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the 5th capacitance
C5, the 6th capacitance C6, the 7th capacitance C7 and the 8th capacitance C8 capacitance be adjusted to above-mentioned corresponding numerical value, by the first inductance
L1, the second inductance L2, third inductance L3 and the 4th inductance L4 inductance value be adjusted to above-mentioned corresponding numerical value, enhance wireless transmission
Matched filtering circuit for band stray filtration result, bigger reduce wireless receiving and dispatching output signal of processor band stray,
Make the utility model wireless communication module in the case where there is no added screening cover, the band stray of module, which all reaches national standard, to be wanted
It asks；The real output of wireless receiving and dispatching processor is further to theoretical output power.
As shown in Fig. 2, wireless receiving matched filtering circuit include the 9th capacitance C9, the tenth capacitance C10, the 5th inductance L5 with
And the 6th inductance L6.
As shown in figure 3, the signal output end of radio frequency controlled switch is connect with one end of the 9th capacitance C9；9th capacitance C9's
The other end is connect with one end of the 5th inductance L5 and the tenth capacitance C10 respectively, the other end of the 5th inductance L5 respectively with wirelessly
One end of the signal input part of transmitting-receiving process device and the 6th inductance L6 are electrically connected；Tenth capacitance C10's and the 6th inductance L6
The other end is grounded.
The utility model by between RF switch and wireless receiving and dispatching processor connect wireless receiving matched filtering circuit,
The band stray of the signal of input wireless receiving and dispatching processor can be filtered out.
As shown in figure 3, wireless receiving and dispatching filter circuit includes the 19th capacitance C19, the 20th capacitance C20, the 21st electricity
Hold C21 and the 7th inductance L7.As shown in figure 3, antenna respectively with one end of the 7th inductance L7 and the 19th capacitance C19 one
The other end of end connection, the 7th inductance L7 connects with one end of the 20th capacitance C20 and one end of the 21st capacitance C21 respectively
Connect, the other end of the 21st capacitance C21 connect with the sending and receiving end of wireless receiving and dispatching processor the other end of the 19th capacitance C19 with
And the 20th capacitance C20 the other end ground connection.
The utility model can filter out day by connecting wireless receiving and dispatching filter circuit between radio frequency controlled switch and antenna
The band for the signal that line is sent to the band stray of the signal of radio frequency controlled switch and radio frequency controlled switch is sent to antenna is outer miscellaneous
It dissipates.
As shown in figure 4, the port that antenna is connect with wireless receiving and dispatching filter circuit be also connected with there are two ESD diode D1 and
D2, D1 and D2 are connected in parallel, other end ground connection.
ESD diode is a kind of over-pressed, antistatic protection element, is the I/O port protections for high speed data transfer application
The device of design.ESD electrostatic protection devices are for avoiding the sensitive circuit in electronic equipment by the shadow of ESD (static discharge)
It rings.
ESD diode principle：ESD diode is parallel in circuit, when circuit works normally, it is in cut-off state
(high-impedance state) does not influence circuit normal work, and when circuit appearance is abnormal over-pressed and reaches its breakdown voltage, it is rapidly by high resistant
State becomes low resistance state, give immediate current provide Low ESR guiding path, while abnormal high pressure strangulation a level of security it
It is interior, to which protection is by protection IC or circuit；When abnormal over-pressed disappearance, restore to high-impedance state, circuit normal work.
When voltage is more than the conducting voltage of ESD diode, ESD diode conducting, ESD voltage is bled off by ground connection, no
Destroy instrument internal.
Such as Fig. 2, shown in 3, in the present embodiment, power circuit is the power supply electricity that wireless receiving and dispatching processor and power supply provide
Pressure is 3.3V, i.e. V3P3 is 3.3V.
As shown in Figure 1, crystal oscillator is connect with wireless receiving and dispatching processor, clock signal is provided for wireless receiving and dispatching processor.At this
In embodiment, crystal oscillator provides the clock signal of 26MHZ for wireless receiving and dispatching processor.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Embodiment is stated, technical solution belonging to the idea of the present invention belongs to the scope of protection of the utility model.It should be pointed out that
For those skilled in the art, several improvements and modifications without departing from the principles of the present invention, this
A little improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (11)
1. a kind of Internet of Things communication module based on the LoRa communication technologys, including MCU, the wireless receiving and dispatching based on the LoRa communication technologys
Processor, wireless transmission matched filtering circuit, radio frequency controlled switch and antenna；The communication port of the MCU with it is described wireless
The communication port of transmitting-receiving process device connects, the control signal of the control signal output of the MCU and the radio frequency controlled switch
Input terminal connects, and emission state or reception state are in for controlling the radio frequency controlled switch；The wireless transmission matching filter
One end of wave circuit is connect with the signal output end of the wireless receiving and dispatching processor, the letter of the other end and the radio frequency controlled switch
The connection of number input terminal；The radio frequency controlled switch is connect with the antenna；It is characterized in that：The wireless transmission matched filtering electricity
Road includes the first capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the 8th electricity
Appearance, the first inductance, the second inductance, third inductance and the 4th inductance；
The signal output end of the wireless receiving and dispatching processor is connect with one end of the 4th inductance；4th inductance it is another
End is connect with one end of one end of the third inductance, one end of the 5th capacitance and the 6th capacitance respectively, described
The other end of third inductance respectively at one end of the 7th capacitance, one end of the 8th capacitance and the wireless receiving and dispatching
The output end of stabilized voltage supply connection of device is managed, the other end of the 5th capacitance connect with one end of second inductance, and described the
The other end of two inductance is connect with one end of one end of first inductance, the third capacitance respectively, first inductance
The other end is connect with one end of the signal input part of the radio frequency controlled switch, first capacitance respectively, second capacitance
It is connect with first inductance in parallel；4th capacitance is connect with second inductance in parallel；First capacitance it is another
End, the other end of the third capacitance, the other end of the 6th capacitance, the 7th capacitance the other end and the described 8th
The other end of capacitance is grounded.
2. the Internet of Things communication module according to claim 1 based on the LoRa communication technologys, it is characterised in that：Described first
The capacitance of capacitance is 4.7pF；The capacitance of second capacitance is 0.75pF；The capacitance of the third capacitance is 12pF；
The capacitance of 4th capacitance is 2.7pF；The capacitance of 5th capacitance is 18pF；The capacitance of 6th capacitance is
15pF；The capacitance of 7th capacitance is 47pF；The capacitance of 8th capacitance is 0.01uF；The electricity of first inductance
Inductance value is 15nH；The inductance value of second inductance is 12nH；The inductance value of the third inductance is 33nH；4th inductance
Inductance value be 1.5nH.
3. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include screening cover；The screening cover covers on the wireless receiving and dispatching processor.
4. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include wireless receiving matched filtering circuit；The signal of one end and the radio frequency controlled switch of the wireless receiving matched filtering circuit
Output end connects, and the other end is connect with the signal input part of the wireless receiving and dispatching processor；The wireless receiving matched filtering electricity
Road includes the 9th capacitance, the tenth capacitance, the 5th inductance and the 6th inductance；The signal output end of the radio frequency controlled switch and institute
State one end connection of the 9th capacitance；The other end of 9th capacitance one end and the described tenth with the 5th inductance respectively
One end of capacitance connects, the other end of the 5th inductance respectively with the signal input part of the wireless receiving and dispatching processor and institute
State one end electrical connection of the 6th inductance；The other end of tenth capacitance and the 6th inductance is grounded.
5. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include wireless receiving and dispatching filter circuit；One end of the wireless receiving and dispatching filter circuit is connect with the sending and receiving end of the radio frequency controlled switch,
The other end is connect with the antenna；The wireless receiving and dispatching filter circuit includes the 19th capacitance, the 20th capacitance, the 21st electricity
Appearance and the 7th inductance；The antenna is connect with one end of one end of the 7th inductance and the 19th capacitance respectively,
The other end of 7th inductance is connect with one end of one end of the 20th capacitance and the 21st capacitance respectively,
The other end of 21st capacitance is connect with the sending and receiving end of the wireless receiving and dispatching processor, the 19th capacitance it is another
The other end of end and the 20th capacitance ground connection.
6. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include two ESD diodes being connected in parallel；One end of described two ESD diodes being connected in parallel is grounded, the other end and antenna
Connection.
7. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include interface circuit；The interface circuit is connect with the MCU；The interface circuit include for terminal device master control borad or collection
The UART interface of middle device master control borad connection.
8. the Internet of Things communication module according to claim 7 based on the LoRa communication technologys, it is characterised in that：The UART
Interface includes the single straight cutting needles of 8PIN and 8PIN patch pads.
9. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include power circuit；The power circuit is connect with the MCU and wireless receiving and dispatching processor respectively, for the MCU and
The wireless receiving and dispatching processor provides power supply.
10. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：It is described
The chip model that MCU is used is HRP506FHNK.
11. the Internet of Things communication module according to claim 1 or 2 based on the LoRa communication technologys, it is characterised in that：Also wrap
Include the crystal oscillator of 26MHZ；The crystal oscillator of the 26MHZ is connect with the wireless receiving and dispatching processor.
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| CN201820535443.4U CN208015773U (en) | 2018-04-17 | 2018-04-17 | A kind of Internet of Things communication module based on the LoRa communication technologys |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109861389A (en) * | 2018-12-20 | 2019-06-07 | 重庆邮电大学 | A kind of photovoltaic energy management system of micro-grid based on LoRa technology |
| CN110247692A (en) * | 2019-06-25 | 2019-09-17 | Oppo广东移动通信有限公司 | Path switching method and Related product |
| CN110808774A (en) * | 2018-11-16 | 2020-02-18 | 中国船舶重工集团公司第七一九研究所 | Multi-mode scattering communication system compatible with LoRa |
| CN111585599A (en) * | 2019-12-11 | 2020-08-25 | 利尔达科技集团股份有限公司 | Multichannel LoRa radio frequency transceiver based on SX1301 |
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2018
- 2018-04-17 CN CN201820535443.4U patent/CN208015773U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110808774A (en) * | 2018-11-16 | 2020-02-18 | 中国船舶重工集团公司第七一九研究所 | Multi-mode scattering communication system compatible with LoRa |
| CN110808774B (en) * | 2018-11-16 | 2022-04-15 | 中国船舶重工集团公司第七一九研究所 | Multi-mode scattering communication system compatible with LoRa |
| CN109861389A (en) * | 2018-12-20 | 2019-06-07 | 重庆邮电大学 | A kind of photovoltaic energy management system of micro-grid based on LoRa technology |
| CN109861389B (en) * | 2018-12-20 | 2022-10-18 | 重庆邮电大学 | Photovoltaic microgrid energy management system based on LoRa technology |
| CN110247692A (en) * | 2019-06-25 | 2019-09-17 | Oppo广东移动通信有限公司 | Path switching method and Related product |
| CN111585599A (en) * | 2019-12-11 | 2020-08-25 | 利尔达科技集团股份有限公司 | Multichannel LoRa radio frequency transceiver based on SX1301 |
| CN111585599B (en) * | 2019-12-11 | 2022-01-07 | 利尔达科技集团股份有限公司 | Multichannel LoRa radio frequency transceiver based on SX1301 |
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Denomination of utility model: An Internet of things communication module based on Lora communication technology Effective date of registration: 20211207 Granted publication date: 20181026 Pledgee: Guangdong Shunde Rural Commercial Bank Co.,Ltd. science and technology innovation sub branch Pledgor: Foshan Jusheng Microelectronics Co.,Ltd. Registration number: Y2021980014276 |
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Date of cancellation: 20230811 Granted publication date: 20181026 Pledgee: Guangdong Shunde Rural Commercial Bank Co.,Ltd. science and technology innovation sub branch Pledgor: Foshan Jusheng Microelectronics Co.,Ltd.|Guangzhou Jusheng Microelectronics Co.,Ltd. Registration number: Y2021980014276 |