Wireless base station waterproof protective module
(1), technical field
The utility model relates to a kind of wireless communication module, the wireless base station module that particularly a kind of waterproof protective performance is fabulous.
(2), background technology
In the modern life, making a copy of and charging of water meter, ammeter and gas meter is a townie big problem.Manually enter the room and check meter, disturb residents and do not say, also may bring unsafe factor to the resident; For each functional company, send someone to check meter to the doorstep and also expended a large amount of human resources and time virtually.The public utilities of China, old conventional management pattern follows so far always.Along with the expansion of cities and towns scale, the increase day by day of flow of personnel, the workload of checking meter is also increasing.The mistake that causes is copied, mistake is copied with dispute, happen occasionally to the protest fee phenomenon, brings influence for the image and the benefit of national enterprise operation, has restricted the development again of enterprise.
In recent years, informationized society has also proposed challenge to some traditional theories in life style that progressively changes people and work habit.Along with the progress of science and technology, the raising of living standards of the people, multilist remote copying system becomes a pith in the sub-district " the intelligent construction ".
Automatic meter reading system mainly adopts cable communicating technology and power line carrier, PLC technology.Cable communicating technology takes advantage with its stability as conventional method, and still, shop lineman's journey of wire communication is great, and is artificially damaged easily.Simultaneously, after residential building built up, again in the wall surface backguy, the resident was difficult to accept.The power line carrier, PLC technology can effectively address the above problem, and it utilizes existing AC power cord as communication line, has saved shop lineman's journey, and is with the obvious advantage.Power-line carrier communication comes across phase early 1920s.It with power circuit as transmission channel, have channel reliability height, small investment, instant effect, with advantages such as power grid construction is synchronous, but the data transmission credibility of power carrier transmission is relatively poor, does not reach practical requirement, and this has also restricted the development of power carrier transmission.
The remote intelligent meter recording gage work is concerning public utilities industry, the operation of energy resource supply enterprise, management benefit.With regard to present situation, the difficulty, difficult charge of checking meter is the common problem that public utilities department's shop front is faced, the counting cost by gas meter workman works under hard conditions, efficient is low, labour intensity is big, uncontrollable phenomenon or the like, has illustrated that all adopting traditional people to go up meter reading method can not adapt to modern society and enterprise development.
And with the time all emerging wireless remote transmission system contrasts traditional meter reading methods incomparable advantage is arranged, more can adapt to modern's life.It has solved the difficult problem of checking meter of registering one's residence, be not disturbed for the user has created, quiet, safe living environment, simultaneously also human and material resources have been saved for administrative department, improved operating efficiency, to do not pay dues, the malicious owing fee person stops for water, electricity, gas, warm, after assigning instruction, system automatically performs, and is the developing direction of long-range household metering table meter.
The technological means of high-new radio communication is adopted in the radio meter register project implementation, and technology that tallies with the national condition and using method have been catered to the developing direction of economy and technology.
And in practice, we find, and the wireless remote transmission system antijamming capability of most of producers is weak, transmission range near, the communication poor reliability, be subjected to the influence of wet environment easily.Wireless communication module is inseparable in the generation of these problems and the system.
(3), utility model content:
The technical problems to be solved in the utility model is: overcome the defective of prior art, provide that a kind of low-power consumption, multichannel can be selected for use, volume is little, in light weight, system height is integrated, antijamming capability is strong, long transmission distance, waterproof ability are strong, the wireless base station module of reliable communications.
The utility model wireless transparent base station module is a kind of autonomous property right knowledge that has, and adopts efficient FEC forward error correction technique in conjunction with high performance radio frequency chip, and a radio communication digital transmission module of high speed microprocessor exploitation.Characteristics such as this module has that antijamming capability is strong, volume is little, low in energy consumption, long transmission distance, water resistance are good are in use without any need for coding techniques.
The technical solution of the utility model:
This wireless base station waterproof protective module contains control unit and radio frequency unit two parts.Control unit comprises peripheral circuits such as high speed microprocessor and reset circuit thereof, program download interface circuit, communication interface circuit, and radio frequency unit comprises radio frequency chip and peripheral circuit and power unit circuit.
Pin 25,26,27,28 is formed 4 line SPI compatibility interfaces of the simulation of microcontroller, the transfer of data between realization and radio frequency unit in the control unit; Pin 30,31 is TTL232 communication interface RXD, TXD, to realize the serial communication function of module and peripheral hardware; C2, C3, R6, X1 form microcontroller 4MHz crystal oscillating circuit; C1, R8 form microcontroller external reset circuit; The ISP interface of being made up of pin 15,16,17,23,24,29 and power supply is used for burning program and radio channel selection.The resistor network of being made up of R9, R10, R11, R12 is the impulse sampling circuit, in order to the down-stream compatibility; Micro processor leg 1 meets external pull-up resistor R13, as the signal triggering port, in order to the down-stream compatibility.
Ground connection after 1,2,3,4, the 5 pin parallel connections of program download interface circuit, 6 pins are connected to the R2 and the C1 tie point of reset circuit, 7 pins and power supply join, and 8,9,10,11,12 pins are connected with 24,23,17,15,16 pins of microprocessor respectively.
Outside supply power one tunnel is the microcontroller power supply after capacitor C 19 filtering, another road through voltage-regulation chip LDO and peripheral work C20, C21, C22, C23 carry out voltage stabilizing, ripple suppresses to obtain the 3V power supply, supply with for radio frequency part provides energy, adopt this power supply isolation technics to be used for reducing of the strong jamming of microcontroller numerical portion radio frequency unit.
The pin 1,2,7,20 of radio frequency chip is formed 4 line SPI compatibility interface SCLK, SO, CSn, SI in the radio frequency unit, be connected with the pin 27,26,25,28 of microcontroller after isolating through resistance R 3, R2, R1, R4 respectively, realize the read-write operation of microcontroller to radio frequency chip internal register, C4 is used for to clock signal SCLK filtering to eliminate sharp cutting edge of a knife or a sword pulse; Pin 6 is connected with microcontroller pin 32 (INT0) after resistance R 5 is isolated, and is used to inform that the microcontroller wireless data been has has been received and dispatched finishes; Pin 12,13 is the input/output port of radiofrequency signal, C9, C10, L1 and L2 form a balanced to unbalanced transformer, in order to the differential RF port translation on the radio frequency chip is become single-ended RF signal, and in the LC of back network carry out jointly impedance transformation with the coupling 50Ohn antenna, C11 is used on the direct current module; LC network C 12, C13, L3, L4 are the radio-frequency passband filter, and it is used for filtering the harmonic content and the interference component of radio-frequency transmission signals, make that the signal spectrum of discrepancy radio frequency chip is purer; C15 is the direct current module capacitance, is used for stopping direct current; Antenna is the 50Ohn antenna; Pin 5 is that the voltage regulator of numerical portion in the radio frequency chip connects decoupling capacitance C6; Ground connection behind the pin 17 crosstalks resistance R7 is for radio frequency chip provides the internal bias electric current; C17, C18, X2 form radio frequency chip 26MHz crystal oscillating circuit; Pin 4,9,11,14,15,18 is supplied with port for the radio frequency chip energy, connect the 3V power supply, and each port is placed decoupling capacitance C5, C16, C14, C8, C7 respectively; Pin 16,19 is connected with power supply ground respectively.
The model of microprocessor is AT mega8v or is AT mega88 that the model of radio frequency chip is CC1100 or is CC1101 that voltage-regulation chip model is XC6206P302P.
The beneficial effects of the utility model are:
1, the utility model wireless module is made of the components and parts of low-power consumption, and its supply power voltage is between DC3V~5.5V, and the power supply voltage range of entire circuit is wide, power consumption is little, its to power supply require low, thereby can prolong useful life of supplying cell.
2, the utility model wireless module adopts wireless mode to receive and sends signal, so this wireless base station module can be applied in the environment of humidity, oil smoke.
3, the hardware circuit of the utility model wireless module has carried out dwindling, simplifying, and is highly integrated, can be contained in the suitable watchcase, carries out sealant pouring and sealing, peripheral so hermetically sealed, realized waterproof, self-protection, the purpose that reliability is high.
4, the utility model wireless transparent module is used for wireless telecommunications, can transmit data pellucidly, promptly receive promptly and send out, when module when serial ports receives peripheral hardware (as: PC) data, data are launched by wireless mode, when module receives wireless data, then wireless data is sent from serial ports.
(4), Figure of description
Fig. 1 is the principal diagram intention of full waterproof wireless base station protection module
(5), specifically execute real mode
Referring to Fig. 1, among the figure, wireless base station waterproof protective module contains control unit module and radio frequency unit module.The control unit module comprises high speed microprocessor and peripheral circuit, reset circuit, program download interface circuit, communication interface circuit and power unit circuit.The radio frequency unit module comprises radio frequency chip and peripheral circuit and power unit circuit.
Pin 25,26,27,28 is formed 4 line SPI compatibility interfaces of the simulation of microcontroller, the transfer of data between realization and radio frequency unit in the control unit; Pin 30,31 is TTL232 communication interface RXD, TXD, to realize the serial communication function of module and peripheral hardware; C2, C3, R6, X1 form microcontroller 4MHz crystal oscillating circuit; C1, R8 form microcontroller external reset circuit; The ISP interface of being made up of pin 15,16,17,23,24,29 and power supply is used for burning program and radio channel selection.The resistor network of being made up of R9, R10, R11, R12 is the impulse sampling circuit, in order to the down-stream compatibility; Micro processor leg 1 meets external pull-up resistor R13, as the signal triggering port, in order to the down-stream compatibility.
Ground connection after 1,2,3,4, the 5 pin parallel connections of program download interface circuit, 6 pins are connected to the R2 and the C1 tie point of reset circuit, 7 pins and power supply join, 8,9,10,11,12 pins are connected with 24,23,17,15,16 pins of microprocessor respectively, are used for burning program and radio channel and select.
Outside supply power one tunnel is the microcontroller power supply after capacitor C 19 filtering, another road through voltage-regulation chip LDO and peripheral work C20, C21, C22, C23 carry out voltage stabilizing, ripple suppresses to obtain the 3V power supply, supply with for radio frequency part provides energy, adopt this power supply isolation technics to be used for reducing of the strong jamming of microcontroller numerical portion radio frequency unit.
The pin 1,2,7,20 of radio frequency chip is formed 4 line SPI compatibility interface SCLK, SO, CSn, SI in the radio frequency unit, be connected with the pin 27,26,25,28 of microcontroller after isolating through resistance R 3, R2, R1, R4 respectively, realize the read-write operation of microcontroller to radio frequency chip internal register, C4 is used for to clock signal SCLK filtering to eliminate sharp cutting edge of a knife or a sword pulse; Pin 6 is connected with microcontroller pin 32 (INT0) after resistance R 5 is isolated, and is used to inform that the microcontroller wireless data been has has been received and dispatched finishes; Pin 12,13 is the input/output port of radiofrequency signal, C9, C10, L1 and L2 form a balanced to unbalanced transformer, in order to the differential RF port translation on the radio frequency chip is become single-ended RF signal, and in the LC of back network carry out jointly impedance transformation with the coupling 50Ohn antenna, C11 is used on the direct current module; LC network C 12, C13, L3, L4 are the radio-frequency passband filter, and it is used for filtering the harmonic content and the interference component of radio-frequency transmission signals, make that the signal spectrum of discrepancy radio frequency chip is purer; C15 is the direct current module capacitance, is used for stopping direct current; Antenna is the 50Ohn antenna; Pin 5 is that the voltage regulator of numerical portion in the radio frequency chip connects decoupling capacitance C6; Ground connection behind the pin 17 crosstalks resistance R7 is for radio frequency chip provides the internal bias electric current; C17, C18, X2 form radio frequency chip 26MHz crystal oscillating circuit; Pin 4,9,11,14,15,18 is that the radio frequency chip energy supplies with port, connects the 3V power supply and individual port is placed decoupling capacitance C5, C16, C14, C8, C7 respectively; Pin 16,19 is connected with power supply ground respectively.
Radio frequency chip is selected a novel radio transceiver CC1100 of Chipcon company based on Smart RF 04 technology, it is the UHF transceiver of the real monolithic of a low cost, can be operated in 315,433,868 and ISM and the SRD frequency band of 915MHz, also can easily be set to other frequency ranges of 300-348MHz, 400-464MHz and 800-928MHz, CC1100 also provides hardware supports widely for processing data packets, data buffering, burst transfers of data, clear channel estimating, quality of connection indication and electromagnetic wave excites.