CN109586765B - Millimeter wave-based electrified railway communication equipment and system - Google Patents
Millimeter wave-based electrified railway communication equipment and system Download PDFInfo
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- CN109586765B CN109586765B CN201910074000.9A CN201910074000A CN109586765B CN 109586765 B CN109586765 B CN 109586765B CN 201910074000 A CN201910074000 A CN 201910074000A CN 109586765 B CN109586765 B CN 109586765B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5483—Systems for power line communications using coupling circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5462—Systems for power line communications
- H04B2203/5491—Systems for power line communications using filtering and bypassing
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to millimeter wave-based electrified railway communication equipment and a millimeter wave-based electrified railway communication system, wherein the equipment comprises an electricity taking module, a power supply module, a power line communication module, a first millimeter wave radio frequency transceiver module and a second millimeter wave radio frequency transceiver module; the power taking module is used for taking power from a power grid and transmitting the acquired current to the power supply module; the power supply module is used for rectifying the current transmitted by the power taking module and supplying power to the power line communication module, the first millimeter wave transceiver module and the second millimeter wave transceiver module; the first millimeter wave receiving and transmitting module and the second millimeter wave receiving and transmitting module are used for receiving and transmitting millimeter waves; the power line communication module is used for carrying out signal conversion on millimeter waves. Millimeter wave communication between electrified railway communication equipment is established through the first millimeter wave radio frequency transceiver module and the second millimeter radio frequency transceiver module, and the electrified railway communication equipment has extremely wide bandwidth, narrow wave beam, extremely strong penetrability and small Doppler effect based on millimeter waves.
Description
Technical Field
The invention relates to the technical field of communication, in particular to millimeter wave-based electrified railway communication equipment and system.
Background
The electrified railway, abbreviated as electrified railway, refers to a railway capable of providing power for running a power train, and the railway is named because the railway is required to be matched with a corresponding electrified module along the line of the railway to provide power for the train. The existing electric train mainly comprises a power vehicle (a motor car) and a high-speed railway (a high-speed railway), the speeds of the motor car and the high-speed railway can reach more than 200KM, a shielding layer is formed on the surfaces of the motor car and the high-speed railway in the process of running at high speed due to Doppler effect, and the shielding layer can shield communication signals of a communication module on the existing electrified railway, so that communication signal interference in and nearby the motor car and the high-speed railway running at high speed is caused, and normal communication is affected.
Disclosure of Invention
Therefore, it is necessary to provide an electrified railway communication device and system based on millimeter waves, which solve the problem of communication influence caused by Doppler effect in the existing running process of motor cars and high-speed rails.
In order to achieve the above object, the present inventors provide an electrified railway communication device based on millimeter waves, which includes an electricity taking module, a power supply module, a power line communication module, a wireless communication module, a first millimeter wave radio frequency transceiver module and a second millimeter wave radio frequency transceiver module;
the power taking module is used for taking power from a power grid and transmitting the acquired current to the power supply module;
The power supply module is used for rectifying the current transmitted by the power taking module and supplying power to the power line communication module, the wireless communication module, the first millimeter wave transceiver module and the second millimeter wave transceiver module;
The first millimeter wave receiving and transmitting module and the second millimeter wave receiving and transmitting module are used for receiving and transmitting millimeter waves;
The wireless communication module is connected with the power line communication module and is used for carrying out signal conversion on equipment outside the high-voltage line;
the power line communication module is used for carrying out signal conversion on millimeter waves.
Further preferably, the frequency of the millimeter waves received or transmitted by the first millimeter wave radio frequency transceiver module and the second millimeter wave radio frequency transceiver module is 30GHz-140GHz.
Further preferably, the wireless fidelity system further comprises a WiFi module, wherein the WIFI module is connected to the power line communication module, the power line communication module is used for converting millimeter wave signals into network signals or converting the network signals into the millimeter wave signals, and the WIFI module is used for sending the WIFI signals.
Further preferably, the wireless communication module is one or more of NoLa communication modules, NB-LoT communication modules, and Zibee communication modules.
Further preferably, the first millimeter wave radio frequency transceiver module and the second millimeter wave radio frequency transceiver module are both provided with millimeter wave antennas, the millimeter wave antennas are used for receiving or transmitting millimeter waves, the millimeter wave antennas are erected on a power grid, and gaps are arranged between the millimeter wave antennas and the power grid.
The inventor also provides another technical scheme: the millimeter wave-based electrified railway communication system comprises a plurality of millimeter wave-based electrified railway communication devices, wherein the millimeter wave-based electrified railway communication devices are connected through millimeter wave communication.
Compared with the prior art, the technical scheme is characterized in that a plurality of millimeter wave-based electrified railway communication equipment is erected at intervals of a power grid of an electrified railway, the electrified railway communication equipment acquires a working power supply from the power grid through the power taking module, then the working power supply is supplied to other modules for working after being processed through the power supply module, millimeter wave communication between the electrified railway communication equipment is established through the first millimeter wave radio frequency transceiver module and the second millimeter radio frequency transceiver module, the millimeter wave-based electrified railway communication equipment has extremely wide bandwidth, is little influenced by natural light and heat radiation, has a narrow beam, has strong penetrability and is little influenced by Doppler effect.
Drawings
Fig. 1 is a schematic structural diagram of an electrified railway communication device based on millimeter waves according to an embodiment;
fig. 2 is a schematic structural diagram of a millimeter wave rf transceiver module according to an embodiment;
FIG. 3 is a schematic diagram of a power module according to an embodiment;
FIG. 4 is a schematic diagram of another principle of the power module according to the embodiment;
FIG. 5 is a schematic diagram of a CT power-up circuit according to an embodiment;
FIG. 6 is a schematic diagram of another circuit diagram of a CT power-up circuit according to an embodiment;
fig. 7 is a schematic structural diagram of an electrified railway communication system based on millimeter waves according to an embodiment.
Reference numerals illustrate:
110. The power taking module is used for taking out power,
120. The power supply module is used for supplying power to the power supply module,
130. A power line communication module is provided which,
140. A first millimeter wave radio frequency transceiver module,
150. A second millimeter wave radio frequency transceiver module,
210. An electrified railway communication device.
Detailed Description
In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.
Referring to fig. 1, the millimeter wave-based electrified railway communication device of the present embodiment includes a power taking module 110, a power supply module 120, a power line communication module 130, a wireless communication module, a first millimeter wave radio frequency transceiver module 140 and a second millimeter wave radio frequency transceiver module 150; the first millimeter wave rf transceiver module 140 and the second millimeter wave rf transceiver module 150 are millimeter wave rf transceiver modules as shown in fig. 2.
The power taking module 110 is configured to take power from a power grid and transmit the obtained current to the power supply module 120;
The power supply module 120 is configured to rectify the current delivered by the power supply module 110 and then supply power to the power line communication module 130, the first millimeter wave transceiver module, and the second millimeter wave transceiver module;
The first millimeter wave receiving and transmitting module and the second millimeter wave receiving and transmitting module are used for receiving and transmitting millimeter waves; the frequencies of the millimeter waves received or transmitted by the first millimeter wave radio frequency transceiver module 140 and the second millimeter wave radio frequency transceiver module 150 are 30GHz-140GHz.
The wireless communication module is connected to the power line communication module 130, and is used for performing signal conversion on equipment outside the high-voltage line;
the power line communication module 130 is configured to perform signal conversion on millimeter waves.
Through erecting a plurality of millimeter wave-based electrified railway communication equipment at intervals of a power grid of an electrified railway, the electrified railway communication equipment acquires a working power supply from a high-voltage bus on the power grid through a power acquisition module 110, and then supplies the working power supply to other modules for working after being processed through a power supply module 120, millimeter wave communication between the electrified railway communication equipment is established through a first millimeter wave radio frequency transceiver module 140 and a second millimeter radio frequency transceiver module, and the millimeter wave-based electrified railway communication equipment has extremely wide bandwidth, is little influenced by natural light and heat radiation, has narrow wave beam, has strong penetrability and little Doppler effect; the wireless communication module is connected to the power line communication module 130, after the wireless communication module receives signals sent by equipment outside the high-voltage line, the received signals are converted, data transmission is carried out through millimeter waves, and therefore the influence of Doppler effect on the sending of detection signals can be reduced.
Referring to fig. 3-6, the power taking module and the power supply module adopt a CT power taking circuit, and are composed of a CT (power taking transformer) and a power conversion module (for converting the electric energy obtained by the CT into the required dc voltage). The CT power taking circuit is used for obtaining a current signal converted by CT and converting the current signal into stable 3.3V (or 5V,12V and the like) direct current voltage, the power conversion module comprises a rectification filter circuit, a DC/DC module circuit, an overvoltage protection circuit, a power failure detection circuit and a backup battery circuit, wherein the current of a high-voltage circuit respectively enters the signal conversion circuit, the CT power taking circuit and the rectification filter circuit after passing through a current sensor and an anti-surge protection circuit, the output end of the rectification filter circuit is connected with the DC/DC module circuit, the overvoltage protection circuit and the power failure detection circuit, the output end of the DC/DC module circuit outputs 3.3V (or 5V,12V and the like) direct current voltage, and the output end of the power failure detection circuit controls whether the backup battery circuit outputs voltage to the whole system. In the fields of high-voltage, ultra-high voltage and ultra-high voltage transmission, a lead can flow through a huge short-time fault current, and a current sensing power supply is additionally provided with a special matched current limiter.
The CT power taking power supply, namely a current induction power supply and a current transformer power taking power supply, is a device for obtaining power supply through an electromagnetic induction principle by a CT (Current Transformer, energy taking transformer) arranged on a power line, is a device for taking power from magnetic field induction generated by lead load current, and the isolation transformation of the power supply is mainly carried out by virtue of the electromagnetic induction principle, so that the voltage transformation and the current transformation can be carried out; at present, various power source transformation mainly comprises voltage transformation, namely high-voltage power generation and transmission to low-voltage transformation inside an electric appliance, and the basic structure of the power source transformation is derived from a voltage transformation mode (such as a PT voltage transformer and the like). Unlike common power supplies, the theoretical basis of current induction power supplies is derived from current transformation based on electromagnetic induction, and the precondition for energy transformation is that the primary side (often a transmission wire) has enough alternating current transmission, and the power supply output must be stable no matter how the wire current fluctuates. Current transformers commonly used in the power industry draw power from a source of current as a typical application.
In this embodiment, for convenience in providing a WIFI signal in a motor car or a high-speed rail, the WIFI module further includes a WIFI module, the WIFI module is connected to the power line communication module 130, the power line communication module 130 is used for converting a millimeter wave signal into a network signal or converting the network signal into a millimeter wave signal, and the WIFI module is used for transmitting the WIFI signal. When the power line communication module 130 receives the millimeter wave signal through the first millimeter wave radio frequency transceiver module 140 or the second millimeter wave radio frequency transceiver module 150, a network connection is established, and then the WIFI signal is provided through the WIFI module, so that the WIFI signal can be received in the motor car or the high-speed rail.
In this embodiment, the wireless communication module is one or more of NoLa communication modules, NB-LoT communication modules, and Zibee communication modules.
The Zibee communication module can be a ZAuZx _t series Zigbee serial port transparent transmission module based on a Zigbee2007/PRO protocol stack developed by the shamen's zhuwanken company, and the module is a 2.4G radio frequency transceiver chip CC2530 and a high-power low-noise radio frequency front end chip CC2591 based on TI high performance and low consumption, so as to realize networking of a very easy-to-use, full-transparent, high-stability, ultra-low power consumption, ultra-long distance and ultra-large scale Zigbee wireless sensor network, and the module is improved to a plurality of times, and finally mature at a low price, directly provides a Zigbee network interface for user maturation medical use, simplifies the development process of a protocol stack difficult to drive in the past into a simple operation of a serial port and an IO port, and ensures that a user fully controls network performance by using detailed strict technical parameters, for example, a host (a connector) using a power amplification chip with CC2530+cc2591, a ZAuZH _with a power consumption module, for example, a device routing device using a power amplification chip with a CC2530+cc2591 (a connector) such as a TCO device using a TCO 2530+cc 2530, a device (a connector with a power amplification chip), and a terminal (for example, a terminal (a connector) such as a connector with a connector 2535, a terminal (a connector) with a connector 2535), a terminal (a connector) such as a terminal (a connector) with a connector 2535), a terminal (a connector) and a terminal (a connector) with a connector (a connector) with a terminal (a connector) 2535) and a terminal (a terminal) such as a terminal (a terminal) a terminal (a terminal) a terminal (a connector) a connector (a device).
The NoLa communication module can adopt an SX1276/77/78 transceiver, the SX1276/77/78 transceiver adopts a LoRa TM remote modem for ultra-long distance spread spectrum communication, the interference resistance is strong, the current small size can be reduced to the greatest extent, the SX1276/77/78 transceiver can obtain high sensitivity exceeding-148 dBm by adopting a low-cost crystal and boring through the LoRa TM patent modulation technology of the lifting technology, in addition, the link of the devices reaches the industry leading level through the integration of the high sensitivity and a +20dBm power amplifier, the optimal selection of long-distance transmission and application with extremely high reliability requirements is realized, compared with the traditional modulation technology, the LoRa TM modulation technology also has obvious advantages in the aspects of anti-blocking and selectivity, and the problem that the traditional design scheme can not simultaneously consider the distance, the interference resistance and the power consumption is solved.
NB-LoT communication module BC95 module, BC95 is a series of NB-LoT module, includes three models: BC95-B5, BC95-B8 and BC95-B20, through NB-LoT radio communication protocol (3 GPP Release-13), BC95 module can establish communication with the basic equipment of mobile network operators, BC95 module can connect with numerous terminal equipments, and has the ultra-small size of 19.9mm x 23.6mm x 2.2mm, almost can meet the application requirements of all Internet of things, meanwhile, LCC patch encapsulation is adopted, so that the mobile terminal can be conveniently embedded into the application of customer products, meanwhile, the power saving technology is adopted, the current consumption is as low as 5uA under the Power Saving Mode (PSM), and the mobile terminal can completely meet the RoHS standard of European Union.
In this embodiment, since the millimeter wave propagation is substantially linear propagation, in order to reduce the trouble of installing the electrified railway communication device based on millimeter waves, the first millimeter wave radio frequency transceiver module 140 and the second millimeter wave radio frequency transceiver module 150 are both provided with millimeter wave antennas for receiving or transmitting millimeter waves, the millimeter wave antennas are erected on a power grid, and a gap is provided between the millimeter wave antennas and the power grid. Because the power network is mainly in a straight line state, the millimeter wave antenna is erected on the power network, a gap is formed between the millimeter wave antenna and the power network, and the millimeter wave antenna is erected on the power network, so that a propagation path of millimeter waves propagates along the power network, and the gap is formed between the millimeter wave antenna and the power network, thereby avoiding the influence of current on the power network on the millimeter wave antenna.
Referring to fig. 7, in another embodiment, a millimeter-wave-based electrified railway communication system includes a plurality of electrified railway communication devices 210, where the plurality of electrified railway communication devices 210 are connected by millimeter-wave communication; the electrified railway communication device 210 comprises a power taking module 110, a power supply module 120, a power line communication module 130, a wireless communication module, a first millimeter wave radio frequency transceiver module 140 and a second millimeter wave radio frequency transceiver module 150;
The power taking module 110 is configured to take power from a power grid and transmit the obtained current to the power supply module 120;
The power supply module 120 is configured to rectify the current delivered by the power supply module 110 and then supply power to the power line communication module 130, the first millimeter wave transceiver module, and the second millimeter wave transceiver module;
The first millimeter wave receiving and transmitting module and the second millimeter wave receiving and transmitting module are used for receiving and transmitting millimeter waves; the frequencies of the millimeter waves received or transmitted by the first millimeter wave radio frequency transceiver module 140 and the second millimeter wave radio frequency transceiver module 150 are 30GHz-140GHz.
The wireless communication module is connected to the power line communication module 130, and is used for performing signal conversion on equipment outside the high-voltage line;
the power line communication module 130 is configured to perform signal conversion on millimeter waves.
Through erecting a plurality of electrified railway communication equipment 210 based on millimeter waves at intervals of a power grid of an electrified railway, the electrified railway communication equipment 210 acquires a working power supply from the power grid through the power acquisition module 110, then supplies the working power supply to other modules for working after being processed through the power supply module 120, and establishes millimeter wave communication between the electrified railway communication equipment 210 through the first millimeter wave radio frequency transceiver module 140 and the second millimeter radio frequency transceiver module; the wireless communication module is connected to the power line communication module 130, after the wireless communication module receives signals sent by equipment outside the high-voltage line, the received signals are converted, data transmission is carried out through millimeter waves, and therefore the influence of Doppler effect on the sending of detection signals can be reduced.
In this embodiment, for convenience in providing a WIFI signal in a motor car or a high-speed rail, the WIFI module further includes a WIFI module, the WIFI module is connected to the power line communication module 130, the power line communication module 130 is used for converting a millimeter wave signal into a network signal or converting the network signal into a millimeter wave signal, and the WIFI module is used for transmitting the WIFI signal. When the power line communication module 130 receives the millimeter wave signal through the first millimeter wave radio frequency transceiver module 140 or the second millimeter wave radio frequency transceiver module 150, a network connection is established, and then the WIFI signal is provided through the WIFI module, so that the WIFI signal can be received in the motor car or the high-speed rail.
In this embodiment, the wireless communication module is one or more of NoLa communication modules, NB-LoT communication modules, and Zibee communication modules.
In this embodiment, since the millimeter wave propagation is substantially linear propagation, in order to reduce the trouble of installing the electrified railway communication device 210 based on millimeter waves, the first millimeter wave radio frequency transceiver module 140 and the second millimeter wave radio frequency transceiver module 150 are both provided with millimeter wave antennas for receiving or transmitting millimeter waves, the millimeter wave antennas are erected on a power grid, and a gap is provided between the millimeter wave antennas and the power grid. Because the power network is mainly in a straight line state, the millimeter wave antenna is erected on the power network, a gap is formed between the millimeter wave antenna and the power network, and the millimeter wave antenna is erected on the power network, so that a propagation path of millimeter waves propagates along the power network, and the gap is formed between the millimeter wave antenna and the power network, thereby avoiding the influence of current on the power network on the millimeter wave antenna.
It should be noted that, although the foregoing embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solution, directly or indirectly, to other relevant technical fields, all of which are included in the scope of the invention.
Claims (5)
1. The millimeter wave-based electrified railway communication equipment is characterized by being erected on a power network of an electrified railway and comprises a power taking module, a power supply module, a power line communication module, a wireless communication module, a first millimeter wave radio frequency transceiver module and a second millimeter wave radio frequency transceiver module;
the power taking module is used for taking power from a power grid and transmitting the acquired current to the power supply module;
the power supply module is used for rectifying the current transmitted by the power taking module and supplying power to the power line communication module, the first millimeter wave transceiver module and the second millimeter wave transceiver module;
The first millimeter wave receiving and transmitting module and the second millimeter wave receiving and transmitting module are used for receiving and transmitting millimeter waves and establishing millimeter wave communication between electrified railway communication equipment;
The wireless communication module is connected with the power line communication module and is used for carrying out signal conversion on equipment outside the high-voltage line;
The power line communication module is used for converting signals of millimeter waves;
The first millimeter wave radio frequency transceiver module and the second millimeter wave radio frequency transceiver module are respectively provided with a millimeter wave antenna, the millimeter wave antennas are used for receiving or transmitting millimeter waves, the millimeter wave antennas are erected on a power grid, and a gap is arranged between each millimeter wave antenna and the power grid.
2. The millimeter wave based electrified railway communication device of claim 1, wherein the millimeter waves received or transmitted by the first millimeter wave radio frequency transceiver module and the second millimeter wave radio frequency transceiver module have frequencies of 30GHz-140GHz.
3. The millimeter wave based electrified railway communication device of claim 1, further comprising a WIFI module connected to the power line communication module, the power line communication module configured to convert millimeter wave signals to network signals or network signals to millimeter wave signals, the WIFI module configured to transmit WIFI signals.
4. The millimeter-wave based electrified railway communication device of claim 1, wherein the wireless communication module is one or more of NoLa communication module, NB-LoT communication module, and Zibee communication module.
5. A millimeter wave-based electrified railway communication system, comprising the millimeter wave-based electrified railway communication device of any one of claims 1 to 4, wherein the millimeter wave-based electrified railway communication device is a plurality of the millimeter wave-based electrified railway communication devices, and the millimeter wave-based electrified railway communication devices are connected through millimeter wave communication.
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| CN105900344A (en) * | 2013-11-06 | 2016-08-24 | At&T知识产权部有限合伙公司 | Millimeter-wave surface-wave communications |
| JP2017505557A (en) * | 2013-11-06 | 2017-02-16 | エイ・ティ・アンド・ティ インテレクチュアル プロパティ アイ，エル．ピー． | Millimeter wave surface wave communication |
| CN108766716A (en) * | 2018-06-01 | 2018-11-06 | 福州瑞品电子科技有限公司 | A kind of coupling magnet ring |
| CN108616288A (en) * | 2018-07-23 | 2018-10-02 | 成都吉纬科技有限公司 | A kind of vehicle-mounted millimeter wave transceiver of rail vehicle ground wireless communication |
| CN108667481A (en) * | 2018-07-23 | 2018-10-16 | 成都吉纬科技有限公司 | A kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station |
| CN209358537U (en) * | 2019-01-25 | 2019-09-06 | 福州瑞品电子科技有限公司 | A kind of electric railway communication equipment and system based on millimeter wave |
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| CN109586765A (en) | 2019-04-05 |
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