CN106160835B - Mobile communication network relay device - Google Patents
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- CN106160835B CN106160835B CN201610697528.8A CN201610697528A CN106160835B CN 106160835 B CN106160835 B CN 106160835B CN 201610697528 A CN201610697528 A CN 201610697528A CN 106160835 B CN106160835 B CN 106160835B
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 239000003990 capacitor Substances 0.000 claims description 115
- 238000012423 maintenance Methods 0.000 claims description 25
- 239000003381 stabilizer Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 18
- 238000004891 communication Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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Abstract
The invention provides a mobile communication network relay device, which comprises a near-end unit and a far-end unit; the proximal end unit includes: the first main controller, the first local interface of maintaining, ethernet transmission module, first high-speed data transfer radio and first power module, first local interface of maintaining, ethernet transmission module and first high-speed data transfer radio are all connected to first main controller, near-end unit passes through ethernet transmission module and is connected with the concentrator, near-end unit is through first local interface of maintaining and external user terminal connection, first power module is first main controller, the first local interface of maintaining, ethernet transmission module and the power supply of first high-speed data transfer radio. The invention has the beneficial effects that: the signal transmission distance between the Ethernet transmission device and the concentrator is prolonged by the enhanced signal.
Description
Technical Field
The present invention relates to a communication device, and more particularly, to a relay device in a mobile communication network.
Background
A signal relay device, in particular to a relay device which is used for relaying and transmitting mobile communication network signals in a mobile communication network signal blind area or a signal unstable area through a wired channel and other wireless channel resources, so that equipment in the area can normally use a mobile communication network for communication, and belongs to the field of power operation and maintenance field detection. With the rapid development and application of the smart grid technology in China, the power consumption information acquisition system for power consumers is mature day by day, but the terminal equipment is installed in various complex environments, and the situation that 2G, 3G or 4G signals are not covered or the signals are unstable exists in part of regions, so that connection cannot be established or unstable connection between the terminal and a main station is caused, and the problem that the terminal data cannot be normally read is caused. Aiming at the problem that signals of mobile communication networks in remote areas, basements of urban buildings and the like cannot cover or power acquisition terminals in environments with weak signals cannot normally use the mobile communication networks for communication, a device for developing and providing terminal uplink data transfer service in a 230MHz power exclusive frequency band is provided, one end of the device interacts data with a concentrator through a wired channel, the uplink data of the concentrator is forwarded by a near-end unit of the device through a 230MHz wireless channel, a far-end unit of the device forwards the data received through the 230MHz wireless channel to the mobile communication network, the relayed data is transmitted to a master station, and the function that the concentrator can normally communicate with the master station in a mobile communication network signal blind area is realized.
The Chinese patent discloses a special transformer communication device without public network signal coverage and with an authorization notice number of CN 204884143U, the device is provided with a near end and a far end, the near end and a special transformer terminal are installed nearby, the near end mainly comprises a first main control unit, a first high-speed data transmission radio station and a first RJ45 Ethernet data access unit, the first RJ45 Ethernet data access unit is connected with the first high-speed data transmission radio station through the first main control unit, the near end interacts data with the special transformer terminal through the first RJ45 Ethernet data access unit, and uplink data of the transformer terminal are forwarded through a 230MHz wireless channel of the first high-speed data transmission radio station. Although the device realizes the normal communication function of the concentrator in the signal blind area of the mobile communication network, the device still has the following defects: 1) for a general first RJ45 ethernet data access unit, it is only used for short distance signal transmission, if the signal is far away, the quality of the signal transmitted is poor, so it cannot be used for long distance signal transmission; 2) when the chip of the first RJ45 ethernet data access unit is used, the chip end is not isolated from the outside, so during the process of transmitting or receiving signals, the signals transmitted by the chip are interfered, and the chip is damaged due to lightning strike and the like.
Disclosure of Invention
The invention provides a mobile communication network relay device, which prolongs the signal transmission distance between an Ethernet transmission device and a concentrator by enhancing signals.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mobile communication network relay device includes a near-end unit and a far-end unit;
the proximal end unit includes: the system comprises a first main controller, a first local maintenance interface, an Ethernet transmission module, a first high-speed data transmission radio station and a first power module, wherein the first local maintenance interface, the Ethernet transmission module and the first high-speed data transmission radio station are all connected to the first main controller;
the remote unit includes: the remote unit is arranged at a position covered by GPRS signals, the remote unit is connected with a mobile communication network through the GPRS module, the remote unit is connected with an external user terminal through the second local maintenance interface, a 230MHz radio frequency channel is formed between the first high-speed data transmission radio station of the near-end unit and the second high-speed data transmission radio station of the remote unit, and the second power supply module supplies power for the second main controller, the second local maintenance interface, the GPRS module and the second high-speed data transmission radio station;
Wherein, ethernet transmission module includes: the system comprises an Ethernet chip, an Ethernet peripheral circuit, a network transformer and RJ-45 interface terminals, wherein the Ethernet peripheral circuit is connected with the Ethernet chip, the Ethernet chip is connected with a concentrator through the RJ-45 interface terminals, and the network transformer is connected to a circuit which is connected with the Ethernet chip and the RJ-45 interface terminals so as to perform analog-to-digital conversion and amplification on signals which are sent to the Ethernet chip by the concentrator.
Preferably, the first and second ends of the RJ-45 interface terminals are connected to a first pair of analog output input/output terminals of the network transformer, the third and sixth ends of the RJ-45 interface terminals are connected to a second pair of analog input/output terminals of the network transformer, the first digital output/input terminal of the network transformer is connected to the first pair of output terminals of the Ethernet chip, the second digital input/output terminal of the network transformer is connected to the second pair of input terminals of the Ethernet chip, a first voltage stabilizing circuit is disposed on a circuit connecting the second pair of input terminals of the Ethernet chip and the network transformer, a second voltage stabilizing circuit is disposed on a circuit connecting the first pair of output terminals of the Ethernet chip and the network transformer, the first voltage stabilizing circuit is connected to the power terminal of the network transformer, a voltage stabilizing grounding circuit is connected to the grounding terminal of the network transformer, and the voltage stabilizing grounding circuit is connected to the fourth end of the RJ-45 interface terminals, The fifth end, the seventh end and the eighth end are connected.
Preferably, the first voltage stabilizing circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor, the cathodes of the first capacitor and the second capacitor are both grounded, the anode of the second capacitor is used for connecting a power supply end of the network transformer, one end of the first resistor is connected with the anode of the first capacitor, the other end of the first resistor is connected with the anode of the second pair of input ends of the ethernet chip, one end of the second resistor is connected with the anode of the first capacitor, and the other end of the second resistor is connected with the cathode of the second pair of input ends of the ethernet chip.
Preferably, the second voltage stabilizing circuit comprises a third resistor, a fourth resistor and a third capacitor, the negative electrode of the third capacitor is grounded, one end of the third resistor and one end of the fourth resistor are both connected with the positive electrode of the third capacitor, and the other end of the third resistor and the other end of the fourth resistor are respectively connected with the positive electrode and the negative electrode of the first pair of output ends.
Preferably, the voltage-stabilizing grounding circuit includes a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, cathodes of the fifth capacitor and the sixth capacitor are grounded, anodes of the fifth capacitor and the sixth capacitor are connected to a cathode of the fourth capacitor, an anode of the fourth capacitor is connected to a ground terminal of the network transformer through the fifth resistor, an anode of the fourth capacitor is connected to the fourth terminal and the fifth terminal of the RJ-45 interface terminal through the sixth resistor, and an anode of the fourth capacitor is connected to the seventh terminal and the eighth terminal of the RJ-45 interface terminal through the seventh resistor.
Preferably, the proximal end unit further comprises: the first infrared connection module is connected with the first controller; the remote unit further comprises: the second infrared connecting module is connected with the second controller; the first local maintenance interface and the second local maintenance interface each include: the differential data transceiver comprises a differential data transceiver, a first photoelectric coupler, a second photoelectric coupler, a third photoelectric coupler, a user interface terminal, a first sub-sensitive resistor, a second sub-sensitive resistor, a first diode, a second diode, an eighth resistor and a ninth resistor, wherein the output end of a receiver of the differential data transceiver is connected with the input end of the first photoelectric coupler, the output end of the first photoelectric coupler is connected with the input end of the first controller or the second controller, the output enable end of the receiver and the drive enable end of the differential data transceiver are both connected with the output end of the second photoelectric coupler, the input end of the second photoelectric coupler is connected with the output end of the first controller or the second controller, the input end of a driver of the differential data transceiver is connected with the output end of the third photoelectric coupler, the input end of the third photoelectric coupler is connected with the output end of the first controller or the second controller, the power end of the differential data transceiver is connected with the 5v power end of the first power module or the second power module, the first end of the user interface terminal is connected to the anode of the first diode through a first sub-sensitive resistor, the anode of the first diode is connected with the B end of the differential data transceiver, the 5v power end of the first power module or the second power module is connected to the anode of the first diode through an eighth resistor, the anode of the first diode is connected with the A end of the differential data transceiver, the B end of the differential data transceiver is connected with the grounding end of the differential data transceiver through a ninth resistor, the grounding end of the differential data transceiver is connected with the cathode of the second diode, the second end of the user interface terminal is connected to the anode of the second diode through a second sub-sensitive resistor, and the anode of the second diode is connected with the cathode of the first diode.
Preferably, the proximal end unit further comprises: the first display module is connected with the first controller; the remote unit further comprises: and the second display module is connected with the second controller.
Preferably, the first power supply module and the second power supply module each include: the power supply comprises an analog-digital converter, a transformer, a step-down voltage stabilizer, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first electrolytic capacitor and a second electrolytic capacitor, wherein a live wire of the analog-digital converter is connected with a commercial power high-voltage wire, a zero wire of the analog-digital converter is connected with a commercial power low-voltage wire, a grounding end of the analog-digital converter is grounded, an output end of the analog-digital converter is a 12v power supply end of a first power module or a second power module and is connected with a 12v end of the transformer, the 12v end of the transformer is connected with an anode of the seventh capacitor, two grounding ends of the transformer, a cathode of the seventh capacitor and a cathode of the eighth capacitor are grounded, a 5v end of the transformer is a 5v power supply end of the first power module or the second power module, a 5v end of the transformer is connected with an input end of the step-down voltage stabilizer, an anode of the tenth capacitor and an anode of the second electrolytic capacitor are connected with an input end of the step-down voltage stabilizer, the grounding end of the step-down voltage stabilizer, the negative electrode of the ninth capacitor, the negative electrode of the tenth capacitor of the first electrolytic capacitor and the negative electrode of the second electrolytic capacitor are all grounded, the two output ends of the step-down voltage stabilizer, the positive electrode of the ninth capacitor and the positive electrode of the first electrolytic capacitor are all connected to a node, and the node is a 3.3v power supply end of the first power module or the second power module.
Compared with the prior art, the invention has the following beneficial effects:
by arranging the Ethernet chip, an Ethernet communication mode between the near-end unit and the concentrator is realized; the driving of the Ethernet chip is realized by arranging the Ethernet peripheral circuit; by arranging the network transformer, the analog-to-digital conversion of the signals is realized, the Ethernet chip is convenient to receive and send data after the analog-to-digital conversion, the signals are amplified, and the signal transmission distance between the Ethernet transmission device and the concentrator is prolonged after the signals are amplified; the connection with the concentrator is facilitated by the provision of RJ-45 interface terminals.
Drawings
FIG. 1 is a network diagram of a relay device in a mobile communication network;
FIG. 2 is a block circuit diagram of the near end unit of FIG. 1;
FIG. 3 is a block circuit diagram of the remote unit of FIG. 1;
FIG. 4 is a circuit diagram of an Ethernet transmission module;
FIG. 5 is a circuit diagram of the first master controller or the second master controller;
FIG. 6 is a circuit diagram of either the first local maintenance interface or the second local maintenance interface;
fig. 7 is a circuit diagram of the first infrared connection module or the second infrared connection module;
fig. 8 is a circuit diagram of the first power supply module or the second power supply module.
Detailed Description
As shown in fig. 1, the present invention provides a relay device in a mobile communication network, which includes a near-end unit 1 and a far-end unit 2.
As shown in fig. 1 and 2, the proximal end unit 1 includes: the first main controller 11, the first local maintenance interface 12, the ethernet transmission module 13, the first high-speed data transmission radio station 14 and the first power module 15, the first local maintenance interface 12, the ethernet transmission module 13 and the first high-speed data transmission radio station 14 are all connected to the first main controller 11, the near-end unit 1 is connected with the concentrator 3 through the ethernet transmission module 13, the near-end unit 1 is connected with an external user terminal through the first local maintenance interface 12, the first power module 15 supplies power for the first main controller 11, the first local maintenance interface 12, the ethernet transmission module 13 and the first high-speed data transmission radio station 14.
As shown in fig. 1 and 3, the remote unit 2 includes: the second main controller 21, the second local maintenance interface 22, the GPRS module 23, the second high-speed data transmission radio station 24 and the second power module 25, the second local maintenance interface 22, the GPRS module 23 and the second high-speed data transmission radio station 24 are all connected to the first main controller 11, the remote unit 2 is installed in a place covered by GPRS signals, the remote unit 2 is connected to a mobile communication network through the GPRS module 23, the remote unit 2 is connected to an external user terminal through the second local maintenance interface 22, a 230MHz radio frequency channel is formed between the first high-speed data transmission radio station 14 of the near-end unit 1 and the second high-speed data transmission radio station 24 of the remote unit 2, and the second power module 25 supplies power to the second main controller 21, the second local maintenance interface 22, the GPRS module 23 and the second high-speed data transmission radio station 24.
As shown in fig. 4, the ethernet transmission module 13 includes: the concentrator comprises an Ethernet chip U10, an Ethernet peripheral circuit, a network transformer U11 and an RJ-45 interface terminal J2, wherein the Ethernet peripheral circuit is connected with the Ethernet chip U10, the Ethernet chip U10 is connected with the concentrator 3 through the RJ-45 interface terminal J2, and the network transformer is connected to a line connecting the Ethernet chip U10 and the RJ-45 interface terminal J2 so as to perform analog-to-digital conversion and amplification on signals sent by the concentrator 3 to the Ethernet chip U10.
As shown in fig. 4 and 5, the first main controller 11 and the second main controller 21 both use STM32 model control chips, the Ethernet chip U10 adopts DM9161 type chip, MDIO pin, RXD [3] pin, RXD [2] pin, RXD [1] pin, RXD [0] pin, MDINTR # pin, RXCLK pin, CRS pin, COL pin, MDC pin, TXD0 pin, TXD1 pin, SPEEDLED # OP1 pin, LINK/ACTLED # OP1 pin, DX/COLLED # OP1 pin, TX + pin, TX-pin, RX + pin, RX-pin, and main control pin of the Ethernet chip U10 are respectively connected with PA1 pin, PB1 pin, PC1 pin, PA1 pin, PB1 pin, PC1 pin, 1 pin and PE1 pin of the first RXD chip U1, and the first host controller 1 to realize the first communication with the first PE chip. The first terminal (pin 1) and the second terminal (pin 2) of the RJ-45 interface terminal J2 are connected to a first pair of analog output terminals (pin TX +/RX + and pin TX-/RX-of the network transformer), the third terminal (pin 3) and the sixth terminal (pin 6) of the RJ-45 interface terminal J2 are connected to a second pair of analog input terminals (pin RX +/TX + and pin RX-/TX-of the network transformer), the first digital output terminals (pin TD +/RD + and pin TD-/RD-of the network transformer U11 are connected to the first pair of output terminals (pin TX + and pin TX-of the Ethernet chip U10, and the second digital input terminals (pin RD +/TD + and pin RD-/TD-of the network transformer U11) are connected to the second pair of input terminals (pin RD +/TD + and pin RX-of the Ethernet chip U10) A first voltage stabilizing circuit is arranged on a circuit connecting a second pair of input ends (namely an RX + pin and an RX-pin) of the Ethernet chip U10 and the network transformer U11, a second voltage stabilizing circuit is arranged on a circuit connecting a first pair of output ends (namely a TX + pin and a TX-pin) of the Ethernet chip U10 and the network transformer U11, the first voltage stabilizing circuit is connected with a power supply end VCC of the network transformer, a voltage stabilizing grounding circuit is connected with a grounding end GND of the network transformer, and the voltage stabilizing grounding circuit is connected with a fourth end (namely a No. 4 pin), a fifth end (namely a No. 5 pin), a seventh end (namely a No. 7 pin) and an eighth end (namely a No. 8 pin) of the RJ-45 interface terminal J2. Through setting up first voltage stabilizing circuit, second voltage stabilizing circuit, realized stable signal transmission between network transformer U11 and ethernet chip U10, guaranteed that signal receiving and dispatching's stability goes on, the second voltage stabilizing circuit has the effect of the power end VCC input voltage of stabilizing network transformer simultaneously in addition, and the 5V power ends of first power module 15 are connected to network transformer's power end VCC.
As shown in fig. 4, the first voltage stabilizing circuit includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2, cathodes of the first capacitor C1 and the second capacitor C2 are both grounded, an anode of the second capacitor C2 is used for connecting a power supply terminal of the network transformer, one end of the first resistor R1 is connected to an anode of the first capacitor C1, the other end of the first resistor R1 is connected to an anode of the second pair of input terminals of the ethernet chip U10, one end of the second resistor R2 is connected to an anode of the first capacitor C1, and the other end of the second resistor R2 is connected to a cathode of the second pair of input terminals of the ethernet chip U10.
As shown in fig. 4, the second voltage stabilizing circuit includes a third resistor R3, a fourth resistor R4, and a third capacitor C3, a negative electrode of the third capacitor C3 is grounded, one end of the third resistor R3 and one end of the fourth resistor R4 are both connected to a positive electrode of the third capacitor C3, and the other end of the third resistor R3 and the other end of the fourth resistor R4 are respectively connected to a positive electrode and a negative electrode of the first pair of output terminals.
As shown in fig. 4, the voltage-stabilizing grounding circuit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6, cathodes of the fifth capacitor C5 and the sixth capacitor C6 are grounded, anodes of the fifth capacitor C5 and the sixth capacitor C6 are connected to a cathode of the fourth capacitor C4, an anode of the fourth capacitor C4 is connected to a ground terminal of the network transformer through the fifth resistor R5, an anode of the fourth capacitor C4 is connected to the fourth terminal and the fifth terminal of the RJ-45 interface terminal J2 through the sixth resistor R6, and an anode of the fourth capacitor C4 is connected to the seventh terminal and the eighth terminal of the RJ-45 interface terminal J2 through the seventh resistor R7. The positive electrode of the fifth capacitor C5 is connected to the casing ground terminal of the ethernet transmission module 13 and to the PD8 terminal of the first master controller 11, so as to avoid electric shock when touching the casing of the ethernet transmission module 13, and the connection of the first master controller 11 to the terminal is used to detect whether the connection is grounded, so as to detect whether the connection is safe.
As shown in fig. 5, 6 and 7, the proximal end unit 1 further includes: the first infrared connection module is connected with the first controller; the remote unit 2 further comprises: and the second infrared connection module is connected with the second controller. The first infrared connection module and the second infrared connection module both adopt RIDA type chips, and a Vout pin of the first infrared connection module or the second infrared connection module is connected with a PD2 pin of the first main controller 11 or the second main controller 21 so as to realize connection.
The first local maintenance interface 12 and the second local maintenance interface 22 each include: the differential data transceiver U2, a first photocoupler E1, a second photocoupler E2, a third photocoupler E3, a user interface terminal J1, a first sub-sensitive resistor R '1, a second sub-sensitive resistor R' 2, a first diode VD1, a second diode VD2, an eighth resistor R8 and a ninth resistor R9. Wherein, the differential data transceiver U2 adopts a chip of type 75LBC 184. A receiver output terminal RO of the differential data transceiver U2 is connected to an input terminal of a first photocoupler E1, an output terminal 485RX of the first photocoupler E1 is connected to an input terminal PB11 of the first or second controller, a receiver output enable terminal RE and a driver enable terminal DE of the differential data transceiver U2 are both connected to an output terminal of a second photocoupler E2, an input terminal EN of the second photocoupler E2 is connected to output terminals (a PE15 pin and a PB7 pin) of the first or second controller, a driver input terminal DI of the differential data transceiver U2 is connected to an output terminal of a third photocoupler E3, an input terminal 485TX of the third photocoupler E3 is connected to an output terminal PB10 of the first or second controller, a power supply terminal 485TX of the differential data transceiver U2 is connected to a power supply terminal VD 5v of the first or second power supply module 25, a first terminal 485TX of the user interface terminal J1 is connected to an anode VD 1' of the first diode R1, an anode of the first diode VD1 is connected to a B terminal of the differential data transceiver U2, a 5v power terminal of the first power module 15 or the second power module 25 is connected to an anode of the first diode VD1 through an eighth resistor R8, an anode of the first diode VD1 is connected to an a terminal of the differential data transceiver U2, a B terminal of the differential data transceiver U2 is connected to a ground terminal GND of the differential data transceiver U2 through a ninth resistor R9, the ground terminal GND of the differential data transceiver U2 is connected to a cathode of the second diode VD2, a second terminal of the user interface terminal J1 is connected to an anode of the second diode VD2 through a second sub-sensitive resistor R' 2, and an anode of the second diode 2 is connected to a cathode VD 1. During operation, first main control unit 11 or second main control unit 21 are through two output ends, input high-low level to the input EN of second photoelectric coupler E2, first sub-sensing resistor R '1 and second sub-sensing resistor R' 2 carry out overvoltage protection to A end and B end respectively, first diode VD1 guarantees to have 0.7 v's pressure differential between A end and the B end, thereby guarantee that the value of Vid is positive all the time in Vid ═ VA-VB, first infrared connection module and second infrared connection module provide infrared communication protocol for first main control unit 11 and second main control unit 21 respectively simultaneously, thereby realize difference data transceiver U2 and first main control unit 11 or second main control unit 21's infrared connection.
As shown in fig. 2 and 3, the proximal end unit 1 further includes: a first display module 16 connected to the first controller; the remote unit 2 further comprises: and a second display module 26 coupled to the second controller.
As shown in fig. 8, in order to utilize the stable 12v, 5v and 3v power required in the commercial power continuous supply circuit, each of the first power module 15 and the second power module 25 includes: an analog-digital converter U7, a transformer U8, a step-down voltage stabilizer U9, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a first electrolytic capacitor C '1 and a second electrolytic capacitor C' 2, a live wire of the analog-digital converter U7 is connected with a commercial power high-voltage wire, a zero wire of the analog-digital converter U7 is connected with a commercial power low-voltage wire, a grounding end of the analog-digital converter U7 is grounded, an output end of the analog-digital converter U7 is a 12v power end of the first power module 15 or the second power module 25 and is connected with a 12v end of the transformer U8, a 12v end of the transformer U8 is connected with a positive electrode of the seventh capacitor C7, two grounding ends of the transformer U8, a negative electrode of the seventh capacitor C7 and a negative electrode of the eighth capacitor C8 are grounded, a 5v end of the transformer U8 is a 5v end of the first power module 15 or the second power module 25, a 5v end of the transformer U8 is connected with an input end of the step-down voltage stabilizer U9, the positive electrode of the tenth capacitor C10 and the positive electrode of the second electrolytic capacitor C '2 are both connected to the input terminal of the step-down voltage regulator U9, the ground terminal of the step-down voltage regulator U9, the negative electrode of the ninth capacitor C9, the negative electrode of the first electrolytic capacitor C' 1, the negative electrode of the tenth capacitor C10, and the negative electrode of the second electrolytic capacitor C '2 are all grounded, the two output terminals of the step-down voltage regulator U9, the positive electrode of the ninth capacitor C9, and the positive electrode of the first electrolytic capacitor C' 1 are all connected to a node, and the node is a 3.3v power supply terminal of the first power module 15 or the second power module 25.
The working principle of the embodiment is as follows: during operation, the near-end unit 1 interacts data with the concentrator 3 through the ethernet transmission module 13, the RJ45 interface terminal of the ethernet transmission module 13 receives the data and forwards the data to the first main controller 11, the first main controller 11 processes the data and then transmits the data to the first high-speed data transmission radio station 14, and the first high-speed data transmission radio station 14 modulates the received data into a 230MHz radio signal and transmits the data through a 230MHz radio frequency channel. Operating parameters of the first high-speed data transfer station 14 and the second high-speed data transfer station 24: communication frequency 230MHz, communication rate 19200 bps. The remote unit 2 accesses the 230MHz radio frequency channel through the second high speed data transmission radio station 24 to receive data, then the second high speed data transmission radio station 24 reversely modulates the wireless signal into a digital signal, and transmits the digital signal to the second main controller 21, the second main controller 21 processes the received data and transmits the processed data to the GPRS module, and the GPRS module repacks the data and transmits the data to the mobile communication network, thereby realizing data transmission.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. A mobile communication network relay device is characterized in that the device comprises a near-end unit and a far-end unit; the proximal end unit includes: the system comprises a first main controller, a first local maintenance interface, an Ethernet transmission module, a first high-speed data transmission radio station and a first power module, wherein the first local maintenance interface, the Ethernet transmission module and the first high-speed data transmission radio station are all connected to the first main controller;
the remote unit includes: the remote unit is arranged in a GPRS signal coverage place and is connected with a mobile communication network through the GPRS module, the remote unit is connected with an external user terminal through the second local maintenance interface, a 230MHz radio frequency channel is formed between a first high-speed data transmission radio station of the near-end unit and a second high-speed data transmission radio station of the remote unit, and the second power module supplies power for the second main controller, the second local maintenance interface, the GPRS module and the second high-speed data transmission radio station;
Wherein, ethernet transmission module includes: the concentrator comprises an Ethernet chip, an Ethernet peripheral circuit, a network transformer and RJ-45 interface terminals, wherein the Ethernet peripheral circuit is connected with the Ethernet chip, the Ethernet chip is connected with the concentrator through the RJ-45 interface terminals, and the network transformer is connected to a circuit for connecting the Ethernet chip with the RJ-45 interface terminals so as to perform analog-to-digital conversion and amplification on signals sent to the Ethernet chip by the concentrator;
the first power module and the second power module each include: the power supply comprises an analog-digital converter, a transformer, a step-down voltage stabilizer, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first electrolytic capacitor and a second electrolytic capacitor, wherein a live wire of the analog-digital converter is connected with a commercial power high-voltage wire, a zero wire of the analog-digital converter is connected with a commercial power low-voltage wire, a grounding end of the analog-digital converter is grounded, an output end of the analog-digital converter is a 12v power supply end of a first power module or a second power module and is connected with a 12v end of the transformer, the 12v end of the transformer is connected with an anode of the seventh capacitor, two grounding ends of the transformer, a cathode of the seventh capacitor and a cathode of the eighth capacitor are grounded, a 5v end of the transformer is a 5v power supply end of the first power module or the second power module, a 5v end of the transformer is connected with an input end of the step-down voltage stabilizer, an anode of the tenth capacitor and an anode of the second electrolytic capacitor are connected with an input end of the step-down voltage stabilizer, the grounding end of the step-down voltage stabilizer, the negative electrode of the ninth capacitor, the negative electrode of the tenth capacitor of the first electrolytic capacitor and the negative electrode of the second electrolytic capacitor are all grounded, two output ends of the step-down voltage stabilizer, the positive electrode of the ninth capacitor and the positive electrode of the first electrolytic capacitor are all connected to a node, and the node is a 3.3v power supply end of the first power module or the second power module;
The proximal end unit further comprises: the first display module is connected with the first controller;
the remote unit further comprises: and the second display module is connected with the second controller.
2. The mobile communication network relay of claim 1, wherein the first and second ends of the RJ-45 interface terminal are connected to a first pair of analog output terminals of the network transformer, the third and sixth ends of the RJ-45 interface terminal are connected to a second pair of analog input terminals of the network transformer, the first digital output terminal of the network transformer is connected to the first pair of output terminals of the Ethernet chip, the second digital input terminal of the network transformer is connected to the second pair of input terminals of the Ethernet chip, a first voltage regulator circuit is disposed on a line connecting the second pair of input terminals of the Ethernet chip to the network transformer, a second voltage regulator circuit is disposed on a line connecting the first pair of output terminals of the Ethernet chip to the network transformer, the first voltage regulator circuit is connected to a power terminal of the network transformer, and a voltage-stabilizing ground circuit is connected to a ground terminal of the network transformer, and the voltage-stabilizing grounding circuit is connected with the fourth end, the fifth end, the seventh end and the eighth end of the RJ-45 interface terminal.
3. The mobile communication network relay device of claim 2, wherein the first voltage regulator circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor, cathodes of the first capacitor and the second capacitor are grounded, an anode of the second capacitor is used for connecting a power supply terminal of the network transformer, one end of the first resistor is connected to an anode of the first capacitor, the other end of the first resistor is connected to an anode of the second pair of input terminals of the ethernet chip, one end of the second resistor is connected to an anode of the first capacitor, and the other end of the second resistor is connected to a cathode of the second pair of input terminals of the ethernet chip.
4. The mobile communication network relay device of claim 2, wherein the second voltage regulator circuit comprises a third resistor, a fourth resistor and a third capacitor, the negative electrode of the third capacitor is grounded, one end of the third resistor and one end of the fourth resistor are connected to the positive electrode of the third capacitor, and the other end of the third resistor and the other end of the fourth resistor are respectively connected to the positive electrode and the negative electrode of the first pair of output terminals.
5. The mobile communication network relay device of claim 2, wherein the voltage-stabilizing ground circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, cathodes of the fifth capacitor and the sixth capacitor are grounded, anodes of the fifth capacitor and the sixth capacitor are connected to a cathode of the fourth capacitor, an anode of the fourth capacitor is connected to the ground terminal of the network transformer through the fifth resistor, an anode of the fourth capacitor is connected to the fourth terminal and the fifth terminal of the RJ-45 interface terminal through the sixth resistor, and an anode of the fourth capacitor is connected to the seventh terminal and the eighth terminal of the RJ-45 interface terminal through the seventh resistor.
6. The mobile communication network relay apparatus of claim 1,
the proximal end unit further comprises: the first infrared connection module is connected with the first controller;
the remote unit further comprises: the second infrared connecting module is connected with the second controller;
the first local maintenance interface and the second local maintenance interface each include: the differential data transceiver comprises a differential data transceiver, a first photoelectric coupler, a second photoelectric coupler, a third photoelectric coupler, a user interface terminal, a first sub-sensitive resistor, a second sub-sensitive resistor, a first diode, a second diode, an eighth resistor and a ninth resistor, wherein the output end of a receiver of the differential data transceiver is connected with the input end of the first photoelectric coupler, the output end of the first photoelectric coupler is connected with the input end of the first controller or the second controller, the output enable end of the receiver and the drive enable end of the differential data transceiver are both connected with the output end of the second photoelectric coupler, the input end of the second photoelectric coupler is connected with the output end of the first controller or the second controller, the input end of a driver of the differential data transceiver is connected with the output end of the third photoelectric coupler, the input end of the third photoelectric coupler is connected with the output end of the first controller or the second controller, the power end of the differential data transceiver is connected with the 5v power end of the first power module or the second power module, the first end of the user interface terminal is connected to the anode of the first diode through a first sub-sensitive resistor, the anode of the first diode is connected with the B end of the differential data transceiver, the 5v power end of the first power module or the second power module is connected to the anode of the first diode through an eighth resistor, the anode of the first diode is connected with the A end of the differential data transceiver, the B end of the differential data transceiver is connected with the grounding end of the differential data transceiver through a ninth resistor, the grounding end of the differential data transceiver is connected with the cathode of the second diode, the second end of the user interface terminal is connected to the anode of the second diode through a second sub-sensitive resistor, and the anode of the second diode is connected with the cathode of the first diode.
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