CN105490722B - GPRS network communication relays - Google Patents

GPRS network communication relays Download PDF

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Publication number
CN105490722B
CN105490722B CN201510791489.3A CN201510791489A CN105490722B CN 105490722 B CN105490722 B CN 105490722B CN 201510791489 A CN201510791489 A CN 201510791489A CN 105490722 B CN105490722 B CN 105490722B
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China
Prior art keywords
chip
carrier
capacitance
circuit
pin
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CN105490722A (en
Inventor
崔宇昊
何大强
吕俊
张波
张瑞棠
陈华灿
胡荣
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ZHUHAI WELLTHING ELECTRONIC Co Ltd
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ZHUHAI WELLTHING ELECTRONIC Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • H04B7/15507Relay station based processing for cell extension or control of coverage area

Abstract

GPRS network communication relays, including concentrator, carrier communication module, CCO units, STA units and GPRS communication modules;The concentrator is connected with the carrier communication module and the CCO units respectively, the STA units are connected with the GPRS communication modules, the STA units form signal transmission elements with the GPRS communication modules, and the STA units are connected by broadband power line with the CCO units.CCO units and STA units of the invention uses wire transmission of the broadband power line of existing 220V as medium progress carrier signal, it is construction is simple, safe and reliable, GPRS module can be solved the problems, such as when telecommunication due to being in blind area or affected by environment leading to the GPRS communication barriers, it not can be used only in electric power GPRS telecommunications, can also use in the GPRS remote transmissions of other industrial equipments and civil equipment.

Description

GPRS network communication relays
Technical field
The invention belongs in field of communication technology more particularly to a kind of GPRS network based on broadband power line carrier communication After device.
Background technology
With the high speed development of China's Automation of Electric Systems and informatization, electric system telecommunication seems especially It is important.Electric system telecommunication is to realize Automation of Electric Systems and information-based one of key factor, and electric system is long-range Communication is needed by means of effective means of communication, the order of control centre is accurately transmitted to terminal unit, and will reflect remote The data information of method, apparatus operating condition is collected into control centre.Currently, electric system telecommunication is mainly using mobile operation The GPRS wireless networks that quotient provides realize the remote data transmission in electric system.However GPRS wireless networks are in practical electric power There are still following defects in the telecommunication of system:1, when concentrator, negative control terminal, distribution transformer terminals, net with GPRS module When environment residing for the terminals such as network table is bad, as being used in heat supply network data transmission electric system project, due to GPRS module Be placed in power distribution cabinet together with terminal and other power equipments or worse environment in, often result in GPRS module signal deteriorate, Cisco unity malfunction causes normal data communication to encounter obstacle;2, the terminal with GPRS module is mounted on GPRS sometimes Signal blind zone, such as the not no signal of basement region, cause the GPRS data of electric system transmit cannot safely and effectively into Row.
In order to solve problem above, the Chinese invention patent application of Publication No. 102064872A discloses a kind of GPRS letters Number repeater, the repeater include data switch unit and remote transmission unit, and data switch unit is mounted on generated energy acquisition In terminal, remote transmission unit is mounted on the good open air of GPRS signals, ensure that electric energy acquisition terminal and main station system it Between efficient communication.But the data switch unit of the repeater is connected with remote transmission unit using Category-5 twisted pair, five classes Twisted-pair feeder is only 80 meters in the effective propagation path ideally of not breakpoint;And such transmission is needed in repeater 5 class line of sending and receiving end cloth, increases difficulty of construction.
The Chinese invention patent application of Publication No. CN104200634A discloses a kind of power remote meter reading system GPRS repeaters, the carrier signal transceiving chip of the repeater is by carrier interface and power line and under same transformer Meter-copy collector is connected, and GPRS transceiving chips are connected by GPRS interfaces with GPRS antenna, and carrier communication indicator light is believed with carrier wave Number transceiving chip is connected, and GPRS communication indicator lights are connected with GPRS transceiving chips, CPU and the carrier wave letter of model STM32F205 Number transceiving chip is connected with GPRS transceiving chips, is responsible for the transmitting and scheduling of carrier signal and GPRS signals.The repeater uses base The PLC that signal is carried in narrowband transmits signal, though it is more advantageous than 5 class lines in transmission range, it need not also construct, current city The maximum communication rate that narrowband carrier chip on field is supported is only 20kbps, and GPRS communication theory maximum rates 171.2kbps, narrowband PLC are used to will appear the phenomenon that long message is exchanged when GPRS transmission, even if subpackage greatly prolongs if communication Call duration time between main website of power office and GPRS terminals.
Invention content
It, can be with the object of the present invention is to provide a kind of construction is simple, safe and reliable, effective GPRS network communication relays Solve the problems, such as when telecommunication GPRS module due to being in blind area or affected by environment leading to the GPRS communication barriers.
To achieve the goals above, the present invention takes following technical solution:
GPRS network communication relays, including:Concentrator, carrier communication module, CCO units, STA units and GPRS communications Module;The concentrator is connected with the carrier communication module and the CCO units respectively, the STA units and the GPRS Communication module is connected, and the STA units form signal transmission elements with the GPRS communication modules, and the STA units pass through width Band power line is connected with the CCO units.
Further, the CCO units include the first bandwidth carrier chip, first singlechip, first carrier transmission circuit, First interface circuit, the one 4 to code switch circuit and the first power module;The first bandwidth carrier chip respectively with it is described First singlechip and the first carrier transmission circuit are connected, the first bandwidth carrier chip simultaneously with first crystal oscillator And first memory is connected;The first singlechip is respectively with the one 4 to code switch circuit, first interface circuit and first Indicator light circuit is connected;First power module includes that sequentially connected first 5V turns 3.3V circuits and the first 3.3V turns 1.2V circuit.
Further, the STA units include the second bandwidth carrier chip, second singlechip, the second carrier transmitting-receiving circuit, Second interface circuit, the 2nd 4 to code switch circuit and second power supply module;The second bandwidth carrier chip respectively with it is described Second singlechip and the second carrier transmitting-receiving circuit are connected, the second bandwidth carrier chip simultaneously with the second crystal oscillator And second memory is connected;The second singlechip is respectively with the 2nd 4 to code switch circuit, second interface circuit and second Indicator light circuit is connected;The second power supply module include sequentially connected 220V turns 5V circuits, the 2nd 5V turns 3.3V circuits, Two 3.3V turn 1.2V circuits and turn the farad capacitor detection circuit that 3.3V circuits are connected with the 5V.
Further, the first bandwidth carrier chip and the second bandwidth carrier chip are Qualcomm's model The chip of QCA7000.
Further, interface J2, J5, J6, J4 of the first carrier transmission circuit respectively with A, B, C three-phase of power line Line is connected with ground wire, three interfaces J2, J6, J5 being connected with the triple line of power line respectively with the first, second, third high pressure coupling Close capacitance (C191, C192, C193) be connected, the first, second, third high pressure coupled capacitor (C191, C192, C193) it is another One end after the first difference build-out resistor (R5) with the transmitting-receiving positive pin phase of the carrier signal of carrier signal coupler (T3) Even, the transmitting-receiving positive pin of the carrier signal of carrier signal coupler (T3) is connected with the anode of antistatic diode (V5);With Receipts of the connected interface (J4) of ground wire after the second difference build-out resistor (R70) with the carrier signal of carrier signal coupler (T3) It sends out negative pin to be connected, the transmitting-receiving negative pin of carrier signal is connected with the anode of antistatic diode (V5), carrier signal coupling The reception negative pin and band logical differential filter circuit phase of reception the positive pin and carrier signal of the carrier signal of clutch (T3) Even, the transmitting positive pin of the carrier signal of carrier signal coupler (T3) and the transmitting negative pin of carrier signal are sent out with carrier wave The coupling matching circuit for penetrating signal is connected.
Further, the reception negative pin of the carrier signal of the carrier signal coupler (T3) is through sequentially connected One resistance (R43), the first, second, third capacitance (C31, C32, C33) and the first, second inductance (L7, L8) are wide with first afterwards The ends RXIN_N with carrier chip are connected, and the reception positive pin of the carrier signal of carrier signal coupler (T3) is through being sequentially connected Second resistance (R45), the 4th, the 5th, the 6th capacitance (C37, C38, C39) and third, the 4th inductance (L11, L12) is afterwards with The ends RXIN_P of one bandwidth carrier chip are connected, between the first capacitance (C31) and the second capacitance (C32) and the 4th capacitance (C37) it is connected with the 5th inductance (L9) between the 5th capacitance (C38), held between (C32) and third capacitance (C33) in electricity second And the 5th be connected with the 6th inductance (L10) between capacitance (C38) and the 6th capacitance (C39), in third capacitance (C33) and the first electricity It is connected with the 7th capacitance (C34) between the 6th capacitance (C39) and third inductance (L11) between sense (L7), in the first inductance (L7) it is connected with the 8th capacitance (C35) between third inductance (L11) and the 4th inductance (L12) between the second inductance (L8), Between the second inductance (L8) and the ends RXIN_N of the first bandwidth carrier chip and the 4th inductance (L12) and the first bandwidth carrier core The 9th capacitance (C36) is connected between the RXIN_P of piece, at the ends RXIN_N of the 9th capacitance (C36) and the first bandwidth carrier chip Between be connected with the first clamp diode (V6), between the 9th capacitance (C36) and the ends RXIN_P of the first bandwidth carrier chip It is connected with the second clamp diode (V7), between the first clamp diode (V6) and the ends RXIN_N of the first bandwidth carrier chip And second be connected with 3rd resistor (R44) between clamp diode (V7) and the ends RXIN_P.
Further, the transmitting negative pin of the carrier signal of the carrier signal coupler (T3) through the in parallel the tenth, 11st capacitance (C25, C26) is connected with the ends TXOUT_N of the first bandwidth carrier chip afterwards, the load of carrier signal coupler (T3) The transmitting positive pin of wave signal after the 12nd, the 13rd capacitance (C27, C28) in parallel with the first bandwidth carrier chip The ends TXOUT_P are connected, and the transmitting negative pin of the carrier signal of carrier signal coupler (T3) is through the 14th capacitance (C24) and load The transmitting positive pin of wave signal is connected;Plus earth, cathode and the first bandwidth carrier chip of third clamp diode (V17) The ends TXOUT_N be connected, the cathode of the 4th clamp diode (V18) connects 3.3V power ends (V3P3B), anode and the first broadband and carries The ends TXOUT_N of wave chip are connected, the plus earth of the 5th clamp diode (V10), cathode and the first bandwidth carrier chip The ends TXOUT_P are connected, and the cathode of the 6th clamp diode (V11) connects 3.3V power ends, anode and the first bandwidth carrier chip The ends TXOUT_P are connected.
Further, the model R7F0C902 of the first singlechip, described one 4 to the 5 of code switch (SW1) to 8 feet are grounded, and 1 to 4 foot is connected with PIN51, PIN50, PIN30, PIN70 pin of first singlechip respectively, first singlechip PIN51, PIN50, PIN30, PIN70 pin respectively with the first, second, third, fourth pull-up resistor (R262, R263, R264, R265) it is connected, another termination 3.3V power supplys of first, second, third, fourth pull-up resistor.
Further, the 1 foot ground connection of the voltage checking chip (U20) of the farad capacitor charging detecting circuit, 2 feet are through the Seven resistance (R269) are connected with the base stage of triode (V16), and 3 feet are negative through the 4th resistance (R234) and the first diode (D24) Extremely it is connected, the anode of the first diode (D24) is connected with 5V power ends, and 2 feet of voltage checking chip (U20) are simultaneously through the 5th electricity Resistance (R250) is connected with 5V power ends;The collector of the triode (V16) is through the 6th resistance (R267) and voltage checking chip (U20) 3 feet are connected, and the collector of triode (V16) is connected with the grid of PMOS tube (V19) simultaneously, the hair of triode (V16) Emitter grounding;The drain electrode of the PMOS tube (V19) is connected with farad capacitor, and farad capacitor is simultaneously through the 4th resistance (R234), the One diode (D24) is connected with 5V power ends, and the source electrode of PMOS tube (V19) is connected with the anode of the second diode (D25), and second The cathode of diode (D25) is connected with 5V power ends, the other end ground connection of farad capacitor.
Further, five pins of PIN7, PIN8, PIN9, PIN10, PIN11 of the first bandwidth carrier chip are outstanding Sky uses the first 3.3V to turn 1.2V circuits as the first bandwidth carrier chip power supply, and the first 3.3V turns the power supply of 1.2V circuits The power input pin of managing chip (U4) be 3.3V input terminal, respectively with the first, second filter capacitor (C17, C18) and One enabled resistance (R23) is connected, the other end ground connection of first, second filter capacitor (C17, C18), the enabled resistance (R23) other end is connected with the enabled pin of power management chip (U4), the switch pin of the power management chip (U4) with One energy storage inductor (L5) is connected, the output pin phase of the other end and the power management chip (U4) of the energy storage inductor (L5) Even, the output pin of the power management chip (U4) is connected with the input terminal of bandwidth carrier chip, the power management chip (U4) output pin is also connected with the first, second output filter capacitor (C15, C16) respectively, the first, second output filter The other end of wave capacitance (C15, C16) is grounded, and the feedback pin of the power management chip (U4) adjusts resistance through first voltage (R24) it is grounded afterwards, feedback pin is connected with second voltage adjustment resistance (R22) simultaneously, the second voltage adjustment resistance (R22) The other end be connected with the input terminal of the first bandwidth carrier chip.
By above technical scheme it is found that STA units and GPRS communication modules are formed signal transmission elements by the present invention, individually It is set to the place that GPRS signals can cover, and using 220V broadband power lines as transmission medium between STA units and CCO units The transmission for carrying out signal, is not needed rewiring not only, but also meet GPRS traffic rate demands, is functionally carried using broadband Wave carries out transparent transmission can support various protocols without being parsed to communication protocol, and it is remote to be not only used in electric system GPRS In Cheng Tongxin, can also be used in it is other civilian or it is industrial using GPRS telecommunications there are blind areas the case where.
Description of the drawings
It in order to illustrate the embodiments of the present invention more clearly, below will be to required use in embodiment or description of the prior art Attached drawing do simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is the structure diagram of the embodiment of the present invention.
Fig. 2 is the structure diagram of CCO units of the embodiment of the present invention.
Fig. 3 is the circuit diagram of bandwidth carrier chip of the embodiment of the present invention.
Fig. 4 is the circuit diagram of carrier transmitting-receiving circuit of the embodiment of the present invention.
Fig. 5 is the circuit diagram that 5V of the embodiment of the present invention turns 3.3V circuits.
Fig. 6 is the circuit diagram that 3.3V of the embodiment of the present invention turns 1.2V circuits.
Fig. 7 is the circuit diagram of microcontroller of the embodiment of the present invention.
Fig. 8 is the structure diagram of STA units of the embodiment of the present invention.
Fig. 9 is the circuit diagram of farad capacitor detection circuit of the embodiment of the present invention.
The specific implementation mode of the present invention is described in more detail below in conjunction with attached drawing.
Specific implementation mode
As shown in Figure 1, the GPRS network communication relays of the present invention include concentrator 1, carrier communication module 2, CCO units 3 (Central Coordinatior, central coordinators), STA units 4 (Station, website) and GPRS communication modules 5.Its In, concentrator 1 is connected with carrier communication module 2 and CCO units 3 respectively, and STA units 4 are connected with GPRS communication modules 5.STA is mono- Member 4 forms signal transmission elements with GPRS communication modules 5, is separately set in the place that GPRS signals can cover, STA units 4 are connected by broadband power line with CCO units 3, and the carrier signal that broadband power line is propagated is with modulation technique OFDM 2- The broadband carrier signal of 30MHz, communication system of the invention are transparent transmissions, do not need analysis protocol, can be not only used for 09 In the GPRS telecommunications of standard concentrator, it can also be used in other industry and civilian GPRS telecommunications.
With reference to Fig. 2, CCO units of the invention include the first bandwidth carrier chip, first singlechip, first carrier transmitting-receiving electricity Road, first interface circuit, the one 4 to code switch circuit and the first power module.Wherein, the first bandwidth carrier chip is distinguished It is connected with first singlechip and first carrier transmission circuit, first carrier transmission circuit is communicated by broadband power line, the One bandwidth carrier chip is connected with first crystal oscillator and first memory simultaneously, and first memory is for storing program.The One microcontroller is respectively connected to code switch circuit, first interface circuit and the first indicator light circuit with the one 4.First power supply Module is each module for power supply, and the first power module of CCO units includes that sequentially connected first 5V turns 3.3V circuits and first 3.3V turns 1.2V circuits, as shown in Figure 5 and Figure 6 respectively, and both of the aforesaid voltage conversion circuit is custom circuit, first turns VDD5V After 3.3VD, then VCC3.3V is switched into 1.2V (Vcore) and is supplied to each modules/circuits.Wherein, the first 5V turns 3.3V circuits The model MP20045DN of power management chip U2, capacitance C9 filter for VDD5V, and capacitance C6, C7 filter for 3.3VD, resistance R20 is enabled pull-up resistor, and resistance R17, diode D5 form power supply instruction circuit for lamp.
The first bandwidth carrier chip of the present invention uses the bandwidth carrier chip of Qualcomm model QCA700, the chip Using Homeplug Green PHY agreements and OFDM modulation techniques are used, carrier frequency 2-30MHz, anti-attenuation is better than 85dBm, Simulation power supply 3.3V, digital power system 1.2V.Fig. 3 is the circuit diagram of QCA7000 chips, and the first bandwidth carrier chip of the invention is adopted Be chip power supply with external voltage conversion circuit, with solve PIN7, PIN8 of high pass QCA7000 chips, PIN9, PIN10, The built-in DC-DC 1.2V output circuits of PIN11 five pins compositions after working long hours, what the electric current increase of circuit was brought Chip generates heat serious problem.The present invention hangs five pins of PIN7, PIN8, PIN9, PIN10, PIN11 of QCA7000 chips Sky uses the first 3.3V as shown in FIG. 6 to turn 1.2V circuits as chip power supply, and U4 is power management chip, model MP2161, The power input pin (2 foot) of power management chip U4 is the input terminal of 3.3V, power input pin and the first filter capacitor C17, the second filter capacitor C18 and enabled resistance R23 are connected, the first filter capacitor C17, the second filter capacitor C18 it is another End ground connection, the enabled resistance R23 other ends are connected with the enabled pin (8 foot) of power management chip U4, power management chip U4's Switch pin (3 foot) is connected with energy storage inductor L5, the other end of energy storage inductor L5 and the output pin (5 of power management chip U4 Foot) it is connected, the output pin of power management chip U4 is connected with the input terminal (Vcore) of bandwidth carrier chip, is the first broadband Carrier chip provides the output voltage of 1.2V, the output pin of power management chip U4 simultaneously with the first output filter capacitor C15, Second output filtering C16 is connected, the first output filter capacitor C15, second output filter capacitor C16 other ends ground connection, power supply pipe The feedback pin (7 foot) of reason chip U4 is grounded after first voltage adjustment resistance R24, and feedback pin is adjusted with second voltage simultaneously Resistance R22 is connected, and the other end of second voltage adjustment resistance R22 is connected with the input terminal (Vcore) of bandwidth carrier chip.
The TX signals of first bandwidth carrier chip are loaded by transmission channel on power line by first carrier transmission circuit, Carrier signal on power line is passed to by the channels RX in the first bandwidth carrier chip and is parsed.As shown in figure 4, of the invention Interface J2, J5, J6 and J4 of first carrier transmission circuit be connected respectively with A, B, C triple line and ground wire of power line, because of height Obturator piece QCA7000 only has a carrier transmitting-receiving channel, ensure that with this any one phase in three-phase signal can and CCO The first bandwidth carrier chip communication in unit.Interface J2, J6, J5 respectively with the first high pressure coupled capacitor C191, the second high pressure Coupled capacitor C192, third high pressure coupled capacitor C193 are connected, and high pressure coupled capacitor is used for the mutual coupling of carrier signal high-low pressure Close, the other end of aforementioned high pressure coupled capacitor C191, C192, C193 after the first difference build-out resistor R5 with carrier signal coupling The transmitting-receiving positive pin (5 foot) of the carrier signal of clutch T3 is connected, the transmitting-receiving positive of the carrier signal of carrier signal coupler T3 Pin is connected with the anode of antistatic TVS diode V5 simultaneously, interface J4 after the second difference build-out resistor R70 with carrier signal The transmitting-receiving negative pin (6 foot) of the carrier signal of coupler T3 is connected, and the transmitting-receiving of the carrier signal of carrier signal coupler T3 is negative Phase pin is connected with another anode of antistatic TVS diode V5 simultaneously.The carrier signal of carrier signal coupler T3 connects The reception negative pin (4 foot) for receiving positive pin (2 foot) and carrier signal is connected with the band logical differential filter circuit of receiving channel, To ensure best receiving sensitivity, the band logical differential filter circuit of the present embodiment by R43, R45, C31, C37, L9, C32, C38, L10, C33, C39, C34, L7, L11, C35, L8, L12, C36, R44 are formed.The carrier signal of carrier signal coupler T3 Reception negative pin through sequentially connected first resistor R43, the first capacitance C31, the second capacitance C32, third capacitance C33, It is connected with the ends RXIN_N of the first bandwidth carrier chip (the reception negative phase end of carrier signal) after one inductance L7 and the second inductance L8, The reception positive pin of the carrier signal of carrier signal coupler T3 through sequentially connected second resistance R45, the 4th capacitance C37, RXIN_P after 5th capacitance C38, the 6th capacitance C39, third inductance L11 and the 4th inductance L12 with the first bandwidth carrier chip (the reception positive terminal of carrier signal) is held to be connected, between the first capacitance C31 and the second capacitance C32 and the 4th capacitance C37 and the It is connected with the 5th inductance L9 between five capacitance C38, between the second capacitance C32 and third capacitance C33 and the 5th capacitance C38 and It is connected with the 6th inductance L10 between six capacitance C39, between third capacitance C33 and the first inductance L7 and the 6th capacitance C39 and It is connected with the 7th capacitance C34 between three inductance L11, between the first inductance L7 and the second inductance L8 and third inductance L11 and Be connected with the 8th capacitance C35 between four inductance L12, between the second inductance L8 and the ends RXIN_N of the first bandwidth carrier chip and It is connected with the 9th capacitance C36 between 4th inductance L12 and the RXIN_P of the first bandwidth carrier chip, in the 9th capacitance C36 and It is connected with the first clamp diode V6 between the ends RXIN_N of one bandwidth carrier chip, is carried in the 9th capacitance C36 and the first broadband The second clamp diode V7 is connected between the ends RXIN_P of wave chip, clamp diode V6, V7 will receive carrier signal quilt Clamper plays the role of the receptions AFE(analog front end) for protecting the first bandwidth carrier chip in 3.3V, in the first clamp diode V6 and Between the ends RXIN_N of the first bandwidth carrier chip and ends RXIN_P of the second clamp diode V7 and the first bandwidth carrier chip Between be connected with 3rd resistor R44.The transmitting positive pin (1 foot) and carrier signal of the carrier signal of carrier signal coupler T3 Transmitting negative pin (3 foot) be connected with the coupling matching circuit of carrier transmission signal, coupling matching electricity routing capacitance C24, C26, C28 are formed, and the transmitting negative pin of the carrier signal of carrier signal coupler T3 is through the tenth capacitance C25 in parallel, the tenth It is connected with the ends TXOUT_N of the first bandwidth carrier chip (the transmitting negative phase end of carrier signal) after one capacitance C26, carrier signal coupling The transmitting positive pin of the carrier signal of clutch T3 after in parallel the 12nd capacitance C27, the 13rd capacitance C28 with the first broadband The ends TXOUT_P (the transmitting positive terminal of carrier signal) of carrier chip are connected, the hair of the carrier signal of carrier signal coupler T3 It penetrates negative pin through the 14th capacitance C24 to be connected with the transmitting positive pin of carrier signal, the anode of third clamp diode V17 Ground connection, cathode are connected with the ends TXOUT_N of the first bandwidth carrier chip, and the cathode of the 4th clamp diode V18 connects 3.3V power supplys End (V3P3B), anode are connected with the ends TXOUT_N of the first bandwidth carrier chip, the plus earth of the 5th clamp diode V10, Cathode is connected with the ends TXOUT_P of the first bandwidth carrier chip, and the cathode of the 6th clamp diode V11 connects 3.3V power ends, just Pole is connected with the ends TXOUT_P of the first bandwidth carrier chip.Aforementioned four clamp diodes V10, V11, V17, V18 composition The transmitting clamp circuit of QCA7000 signals.
The R7F0C902 of the model Renesas of the first singlechip of the present embodiment, first memory use Hua Bang companies The flash storage of model W25Q16D, XL1 25M crystal oscillators provide clock for chip operation.Fig. 7 is that the present embodiment first is single The circuit diagram of piece machine, microcontroller is for simulating actual GPRS module and the communication of concentrator interface circuit, the interface J1 of microcontroller For online burning program interface, SW1 is 4 and is grounded to 5 to 8 feet of code switch SW1 to code switch, and 1 to 4 foot is respectively with first PIN51, PIN50, PIN30, PIN70 of microcontroller U3 is connected.PIN51, PIN50, PIN30, PIN70 of first singlechip U3 points It is not connected with the first pull-up resistor R262, the second pull-up resistor R263, third pull-up resistor R264, the 4th pull-up resistor R265, Other pins of another termination 3.3V power supplys of pull-up resistor, first singlechip U3 are common pin, and therefore not to repeat here.Due to In adjacent area or same taiwan area there may be multiple GPRS network signal repeaters, lead to that crosstalk phenomenon, the present invention occurs CCO units and STA units in be respectively set one to code switch, by may be implemented to believe in same GPRS network to code switch The one-to-one communication at the ends CCO and the ends STA of number repeater avoids multiple GPRS network signal repeaters hairs in the same area Raw crosstalk.It is identical as the connection type at the ends CCO and the ends STA to code switch SW1.
As shown in figure 8, the STA units of the present embodiment equally include the second bandwidth carrier chip, second singlechip, the second load Wave transmission circuit, enemy's interface circuit, the 2nd 4 second source mould to code switch circuit and for the power supply of each circuits/modules Block.The difference is that the second power supply module of STA units includes, sequentially connected 220V turns 5V circuits, the 2nd 5V turns 3.3V circuits, 2nd 3.3V turns 1.2V circuits and turns the farad capacitor detection circuit that 3.3V circuits are connected with the 2nd 5V, is set in STA units Farad capacitor detection circuit is set, can ensure that whole system works normally 2 minutes in unexpected have a power failure, effectively ensure power train System makes corresponding reply.
Fig. 9 is the circuit diagram of farad capacitor charging detecting circuit, with reference to Fig. 9, the voltage of farad capacitor charging detecting circuit 1 foot of detection chip U20 is grounded, and 2 feet are connected after the 7th resistance R269 with the base stage of triode V16, and 3 feet are through the 4th resistance R234 is connected with the cathode of the first diode D24, and the anode of the first diode D24 is connected with VDD5V power ends, voltage detecting core 2 feet of piece U20 are connected through the 5th resistance R250 with VDD5V power ends simultaneously.The collector of triode V16 is through the 6th resistance R267 It is connected with 3 feet of voltage checking chip U20, the collector of triode V16 is connected with the grid of PMOS tube V19 simultaneously, triode The emitter of V16 is grounded.The drain electrode of PMOS tube V19 is connected with farad capacitor, and farad capacitor is simultaneously through the 4th resistance R234, first Diode D24 is connected with VDD5V power ends, and the source electrode of PMOS tube V19 is connected with the anode of the second diode D25, the two or two pole The cathode of pipe D25 is connected with VDD5V power ends.The farad capacitor of the present embodiment is made of R235, R238, C364, C365, farad The other end of capacitance is grounded.
When input voltage is less than 4.38V, the output of voltage checking chip U20 is low level, the collector of triode V16 For high level, PMOS tube V19 is not turned at this time, and farad capacitor does not discharge, and the effect of the second diode D25 prevents PMOS tube Internal protection diode can dragging down farad capacitor when less than 4.38V.The V16 of the present embodiment manages for NPN, V19 PMOS The discharge path of farad capacitor switchs, because PMOS has a built-in protection diode, D25 that can prevent to generate when charge and discharge Backflow phenomenon.
Farad capacitor charging detecting circuit when the ends STA power off suddenly, can allow the GPRS module at the ends insertion STA after Continuous continue working 2 minutes, to ensure that power cut-off information etc. is passed to main website of power supply bureau by GPRS moulds, power supply bureau can make answers accordingly It is right.The voltage checking chip of the farad capacitor charging detecting circuit of the present embodiment selectes 4.38V, and voltage drops to 4.38V after power-off When, farad capacitor electric discharge turns off, and no longer gives circuit power supply, to ensure that service life that capacitance charges repeatedly and GPRS are less than The ends STA will not be led to again after the power is turned on by continuing electric discharge after 4.38V, need to wait for 10 minutes or more just concentrator and GPRS module The phenomenon that capable of connecting, occurs.
By above technical scheme it is found that the communication between the CCO units and STA units of the present invention does not need rewiring, But it carries out meeting Homeplug Green PHY Protocol broadband 2-30MHz carrier waves using existing 220V power lines as medium The wire transmission of signal not only supports 376.1 agreements of concentrator because the present invention is to use transparent transmission, other Any agreement is all supported, and the present invention not can be used only in electric power GPRS telecommunications, can also use in other industry In the GPRS remote transmissions of equipment and civil equipment.The STA units of the present invention, as battery, can be protected effectively by farad capacitor Under power-down conditions suddenly, the ends STA can also work 2 minutes card, and power loss event is transferred to the control centre of telecommunication, control Center processed can make corresponding reply with this.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair The present invention is described in detail, it should be understood by a person of ordinary skill in the art that still can be to the specific of the present invention Embodiment is modified or replaced equivalently, and without departing from any modification of spirit and scope of the invention or equivalent replacement, It should all cover among scope of the presently claimed invention.

Claims (8)

1.GPRS network communication repeaters, which is characterized in that including:Concentrator, carrier communication module, central coordinator (CCO) Unit, website (STA) unit and GPRS communication modules;
The concentrator is connected with the carrier communication module and the CCO units respectively, and the STA units are logical with the GPRS Believe that module is connected, the STA units form signal transmission elements with the GPRS communication modules, and the STA units pass through broadband Power line is connected with the CCO units;
The CCO units include the first bandwidth carrier chip, first singlechip, first carrier transmission circuit, first interface circuit, One 4 to code switch circuit and the first power module;The first bandwidth carrier chip respectively with the first singlechip and The first carrier transmission circuit be connected, the first bandwidth carrier chip simultaneously with first crystal oscillator and first memory It is connected;The first singlechip is respectively with the one 4 to code switch circuit, first interface circuit and the first indicator light circuit phase Even;First power module includes that sequentially connected first 5V turns 3.3V circuits and the first 3.3V turns 1.2V circuits;
The STA units include the second bandwidth carrier chip, second singlechip, the second carrier transmitting-receiving circuit, second interface circuit, 2nd 4 to code switch circuit and second power supply module;The second bandwidth carrier chip respectively with the second singlechip and The second carrier transmitting-receiving circuit be connected, the second bandwidth carrier chip simultaneously with the second crystal oscillator and second memory It is connected;The second singlechip is respectively with the 2nd 4 to code switch circuit, second interface circuit and the second indicator light circuit phase Even;The second power supply module includes that sequentially connected 220V turns 5V circuits, the 2nd 5V turns 3.3V circuits, the 2nd 3.3V turns 1.2V Circuit and turn the farad capacitor detection circuit that 3.3V circuits are connected with the 2nd 5V.
2. GPRS network communication relays as described in claim 1, it is characterised in that:The first bandwidth carrier chip and Two bandwidth carrier chips are the chip of Qualcomm model QCA7000.
3. GPRS network communication relays as described in claim 1, it is characterised in that:The first carrier transmission circuit connects Mouth J2, J6, J5, J4 are connected with A, B, C triple line and ground wire of power line respectively, and three to be connected with the triple line of power line connect Mouth J2, J6, J5 are connected with the first, second, third high pressure coupled capacitor (C191, C192, C193) respectively, described first, second, The other end of third high pressure coupled capacitor (C191, C192, C193) is after the first difference build-out resistor (R5) and carrier signal The transmitting-receiving positive pin of the carrier signal of coupler (T3) is connected, the transmitting-receiving positive of the carrier signal of carrier signal coupler (T3) Pin is connected with the anode of antistatic diode (V5);The interface (J4) being connected with ground wire is through the second difference build-out resistor (R70) Be connected afterwards with the transmitting-receiving negative pin of the carrier signal of carrier signal coupler (T3), the transmitting-receiving negative pin of carrier signal with it is anti- Another anode of electrostatic diode (V5) is connected, the reception positive pin and load of the carrier signal of carrier signal coupler (T3) The reception negative pin of wave signal is connected with band logical differential filter circuit, the transmitting of the carrier signal of carrier signal coupler (T3) Positive pin and the transmitting negative pin of carrier signal are connected with the coupling matching circuit of carrier transmission signal;
The composition of the second carrier transmitting-receiving circuit is identical as the composition of first carrier transmission circuit.
4. GPRS network communication relays as claimed in claim 3, it is characterised in that:The carrier signal coupler (T3) The reception negative pin of carrier signal through sequentially connected first resistor (R43), the first, second, third capacitance (C31, C32, C33) and the first, second inductance (L7, L8) is connected with the ends RXIN_N of the first bandwidth carrier chip afterwards, carrier signal coupler (T3) the reception positive pin of carrier signal through sequentially connected second resistance (R45), the four, the five, the 6th capacitances (C37, C38, C39) and third, the 4th inductance (L11, L12) be connected afterwards with the ends RXIN_P of the first bandwidth carrier chip, in the first capacitance (C31) it is connected with the 5th inductance (L9) between the 4th capacitance (C37) and the 5th capacitance (C38) between the second capacitance (C32), Is connected between the 5th capacitance (C38) and the 6th capacitance (C39) between the second capacitance (C32) and third capacitance (C33) Six inductance (L10), between third capacitance (C33) and the first inductance (L7) and the 6th capacitance (C39) and third inductance (L11) it Between be connected with the 7th capacitance (C34), between the first inductance (L7) and the second inductance (L8) and third inductance (L11) with the 4th electricity It is connected with the 8th capacitance (C35) between sense (L12), between the second inductance (L8) and the ends RXIN_N of the first bandwidth carrier chip And the 4th be connected with the 9th capacitance (C36) between inductance (L12) and the ends RXIN_P of the first bandwidth carrier chip, in the 9th capacitance (C36) the first clamp diode (V6) is connected between the ends RXIN_N of the first bandwidth carrier chip, in the 9th capacitance (C36) The second clamp diode (V7) is connected between the ends RXIN_P of the first bandwidth carrier chip, at the first clamp diode (V6) Between the ends RXIN_N of the first bandwidth carrier chip and the RXIN_ of the second clamp diode (V7) and the first bandwidth carrier chip 3rd resistor (R44) is connected between the ends P.
5. GPRS network communication relays as claimed in claim 3, it is characterised in that:The carrier signal coupler (T3) The transmitting negative pin of carrier signal after the ten, the 11st capacitances (C25, C26) in parallel with the first bandwidth carrier chip The ends TXOUT_N are connected, and the transmitting positive pin of the carrier signal of carrier signal coupler (T3) is through the in parallel the 12nd, the 13rd Capacitance (C27, C28) is connected with the ends TXOUT_P of the first bandwidth carrier chip afterwards, the carrier signal of carrier signal coupler (T3) Transmitting negative pin be connected with the transmitting positive pin of carrier signal through the 14th capacitance (C24);
The plus earth of third clamp diode (V17), cathode are connected with the ends TXOUT_N of the first bandwidth carrier chip, and the 4th The cathode of clamp diode (V18) connects the ends the TXOUT_N phase of 3.3V power ends (V3P3B), anode and the first bandwidth carrier chip Even, the plus earth of the 5th clamp diode (V10), cathode are connected with the ends TXOUT_P of the first bandwidth carrier chip, the 6th pincers The cathode of position diode (V11) connects 3.3V power ends, anode is connected with the ends TXOUT_P of the first bandwidth carrier chip.
6. GPRS network communication relays as described in claim 1, it is characterised in that:The model of the first singlechip R7F0C902, described one 4 is grounded 5 to 8 feet of code switch (SW1), 1 to 4 foot respectively with the PIN51 of first singlechip, PIN50, PIN30, PIN70 pin are connected, PIN51, PIN50, PIN30, PIN70 pin of first singlechip respectively with first, Second, third, the 4th pull-up resistor (R262, R263, R264, R265) be connected, it is described first, second, third, fourth pull-up electricity Another termination 3.3V power supplys of resistance;
The circuit composition of the second singlechip is identical as the circuit composition of the first singlechip.
7. GPRS network communication relays as described in claim 1, it is characterised in that:The electricity of the farad capacitor detection circuit The 1 foot ground connection of detection chip (U20), 2 feet is pressed to be connected with the base stage of triode (V16) through the 7th resistance (R269), 3 feet are through the 4th Resistance (R234) is connected with the cathode of the first diode (D24), and the anode of the first diode (D24) is connected with 5V power ends, electricity 2 feet of pressure detection chip (U20) are connected through the 5th resistance (R250) with 5V power ends simultaneously;The current collection of the triode (V16) The 6th resistance (R267) of pole is connected with 3 feet of voltage checking chip (U20), the collector of triode (V16) while and PMOS The grid for managing (V19) is connected, the emitter ground connection of triode (V16);The drain electrode of the PMOS tube (V19) and farad capacitor phase Even, farad capacitor is connected through the 4th resistance (R234), the first diode (D24) with 5V power ends simultaneously, the source of PMOS tube (V19) Pole is connected with the anode of the second diode (D25), and the cathode of the second diode (D25) is connected with 5V power ends, farad capacitor The other end is grounded.
8. GPRS network communication relays as claimed in claim 2, it is characterised in that:The first bandwidth carrier chip Five pins of PIN7, PIN8, PIN9, PIN10, PIN11 are hanging, and the first 3.3V is used to turn 1.2V circuits as the first bandwidth carrier core Piece is powered, the input terminal that the power input pin that the first 3.3V turns the power management chip (U4) of 1.2V circuits is 3.3V, It is connected with the first, second filter capacitor (C17, C18) and an enabled resistance (R23) respectively, first, second filter capacitor The other end of (C17, C18) is grounded, the enabled pin phase of enabled resistance (R23) other end and power management chip (U4) Even, the switch pin of the power management chip (U4) is connected with an energy storage inductor (L5), the energy storage inductor (L5) it is another End is connected with the output pin of the power management chip (U4), the output pin of the power management chip (U4) and first wide Input terminal with carrier chip is connected, and the output pin of the power management chip (U4) is also filtered with the first, second output respectively Wave capacitance (C15, C16) is connected, the other end ground connection of first, second output filter capacitor (C15, C16), the power supply pipe The feedback pin of reason chip (U4) is grounded after first voltage adjustment resistance (R24), and feedback pin is adjusted with second voltage simultaneously Resistance (R22) is connected, the input terminal phase of the other end and the first bandwidth carrier chip of the second voltage adjustment resistance (R22) Even;
The circuit composition of the second bandwidth carrier chip is identical as the circuit composition of the first bandwidth carrier chip.
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