CN115915501B - Mining intrinsic safety type base station and communication system - Google Patents
Mining intrinsic safety type base station and communication system Download PDFInfo
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- CN115915501B CN115915501B CN202111194471.7A CN202111194471A CN115915501B CN 115915501 B CN115915501 B CN 115915501B CN 202111194471 A CN202111194471 A CN 202111194471A CN 115915501 B CN115915501 B CN 115915501B
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- 238000005065 mining Methods 0.000 title claims abstract description 33
- 238000004891 communication Methods 0.000 title claims abstract description 13
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a mining intrinsic safety type base station and a communication system. The invention sets a micro remote radio unit pRRU in a mining intrinsic safety base station, and comprises a first area module and a second area module; the first intrinsic safety power supply is connected with the first area module and is used for supplying power to the first area module; and the second intrinsic safety power supply is connected with the second region module and is used for supplying power to the second region module. The pRRU is divided into two areas, and two paths of intrinsic safety power supplies are used for supplying power to the areas respectively, so that the power consumption requirement of the intrinsic safety type base station equipment is met, and the intrinsic safety type base station equipment is adopted to replace the flameproof equipment, so that the use of an explosion-proof shell is avoided, the cost is reduced, and meanwhile, the convenience of installation is improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a mining intrinsic safety type base station and a communication system.
Background
5G is used as an advanced communication technology to widely develop commercial use worldwide, and by virtue of the unique advantages of large bandwidth, low time delay, wide connection, high reliability and the like, the application scene of 5G in the vertical industry is continuously widened, such as the coal industry, the port industry, the steel industry and the like. The application of 5G in underground coal mines is blank in China and even worldwide, the formal stepping of the coal industry in China into the 5G era is promoted, the 5G application scene is enriched, the automatic detection and real-time interconnection of underground personnel, equipment and environments are realized, and an intelligent mine is created.
The underground coal mine has explosive gases such as gas, and the electrical equipment used in the underground coal mine must be explosion-proof electrical equipment. The conventional 5G base station apparatus generally adopts an explosion-proof apparatus, and its application in a coal mine is shown in fig. 1, where both a baseband processing unit (Building Base band Unite, BBU) and a remote radio unit (Radio Remote Unit, RRU) are required to be installed in an explosion-proof housing, and the BBU and the RRU are powered by a 127V ac power supply, and this design method may cause problems of high cost and inconvenient installation.
Disclosure of Invention
The invention mainly aims to provide a mining intrinsic safety type base station and a communication system, and aims to solve the problems that in the prior art, mining base station equipment needs to be installed in an explosion-proof shell, so that the cost is high and the installation is inconvenient.
To achieve the above object, a first aspect of the present invention provides a mining intrinsic safety type base station, including:
the micro remote radio unit pRRU comprises a first area module and a second area module;
the first intrinsic safety power supply is connected with the first area module and is used for supplying power to the first area module;
and the second intrinsic safety power supply is connected with the second area module and is used for supplying power to the second area module.
In the embodiment of the invention, a first area module is used for placing first equipment, and the first equipment is used for performing intermediate frequency processing on signals and powering on according to time sequence;
and the second area module is used for placing second equipment which is used for amplifying the signals.
In the embodiment of the invention, the first area module is further used for placing a first discrete power supply chip, the input end of the first discrete power supply chip is connected with the first intrinsic safety power supply, and the output end of the first discrete power supply chip is connected with the first device.
In the embodiment of the invention, the first equipment comprises an SOC chip, an analog-to-digital or digital-to-analog conversion chip, a clock chip and a radio frequency transceiver chip.
In the embodiment of the invention, the second area module is further used for placing a second discrete power supply chip, the input end of the second discrete power supply chip is connected with a second intrinsic safety power supply, and the output end of the second discrete power supply chip is connected with second equipment.
In an embodiment of the invention, the second device includes a power amplifier, a portal chip, and a low noise amplifier.
In the embodiment of the invention, the mining intrinsic safety type base station further comprises:
the signal isolator is arranged between the first area module and the second area module and is used for isolating radio frequency signals between the first area module and the second area module;
the optocoupler is arranged between the first area module and the second area module and used for isolating control signals between the first area module and the second area module.
In the embodiment of the invention, the mining intrinsic safety type base station further comprises:
and the baseband processing equipment BBU is connected with the pRRU.
In the embodiment of the invention, the number of pRRUs is multiple, and the pRRUs are connected with BBUs to form a ring network.
The second aspect of the invention provides a communication system, which comprises the mining intrinsic safety type base station.
According to the embodiment of the invention, the micro remote radio unit pRRU is arranged in the mining intrinsic safety type base station, and the micro remote radio unit pRRU comprises a first area module and a second area module; the first intrinsic safety power supply is connected with the first area module and is used for supplying power to the first area module; and the second intrinsic safety power supply is connected with the second area module and is used for supplying power to the second area module. The pRRU is divided into two areas, and two paths of intrinsic safety power supplies are used for supplying power to the areas respectively, so that the power consumption requirement of intrinsic safety type equipment is met, and the intrinsic safety type base station equipment is adopted to replace the flameproof equipment, so that the use of an explosion-proof shell is avoided, the cost is reduced, and meanwhile, the convenience of installation is improved.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a conventional 5G base station apparatus in use downhole in a coal mine;
FIG. 2 is a functional block diagram of one embodiment of a mining intrinsic safety type base station in accordance with an embodiment of the present invention;
fig. 3 is a schematic power supply diagram of an RRU device in a conventional 5G base station;
FIG. 4 is a schematic diagram of an alternative architecture of the mine intrinsic safety base station of FIG. 2;
FIG. 5 is a schematic diagram of an alternative architecture of the mine intrinsic safety base station of FIG. 2;
fig. 6 is a networking schematic diagram of an embodiment of a mining intrinsic safety type base station according to an embodiment of the present invention.
Reference numerals illustrate:
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The embodiment of the invention provides a mining intrinsic safety type base station.
Fig. 2 is a functional block diagram of an embodiment of a mining intrinsically safe base station in accordance with an embodiment of the present invention. Referring to fig. 2, in an embodiment, a mining intrinsically safe base station may include a micro-remote radio unit pRRU10, including a first zone module 110 and a second zone module 120; the first intrinsic safety power supply 20 is connected with the first area module 110 and is used for supplying power to the first area module 110; the second intrinsic safety power supply 30 is connected with the second area module 120 and is used for supplying power to the second area module 120.
It should be understood that the explosion-proof type of the mining explosion-proof electrical equipment includes an intrinsically safe type (hereinafter referred to as intrinsic safety type) and an explosion-proof type. The differences between the intrinsically safe electrical device and the flameproof electrical device are shown in table 1 below:
TABLE 1
The traditional 5G base station equipment adopts explosion-proof electrical equipment, and the explosion-proof principle of the explosion-proof electrical equipment is as follows: the charged components of the electrical device are placed in a specially made housing which has the function of isolating sparks and arcs generated by the electrical components in the housing from the explosive mixture outside the housing and which is capable of withstanding the explosion pressure generated when the explosive mixture entering the housing is detonated by the sparks and arcs of the electrical device in the housing without the housing being destroyed and at the same time preventing the explosion products in the housing from propagating to the explosive mixture outside the housing and causing the explosive mixture outside the housing to burn and explode. This special enclosure is called an "explosion-proof enclosure". An electrical apparatus having an explosion-proof housing is referred to as an "explosion-proof electrical apparatus". The explosion-proof electrical equipment has good explosion-proof and explosion-proof properties, and is widely used in explosive environment workplaces such as underground coal mines. The sign of the flameproof electrical device is "d". The main structure of the flameproof electrical equipment comprises a flameproof shell and parts attached to the shell, such as a gasket, a transparent piece, a cable lead-in device, a junction box and the like, except for an electrical part.
According to the explosion-proof principle of the explosion-proof type electrical equipment, the explosion-proof shell has explosion-proof performance and explosion-proof performance. Explosion-proof refers to the ability of the enclosure to withstand the explosion pressure created by the explosion of an explosive mixture within the enclosure without itself being damaged or dangerously deformed. The flameproof property is the property that flame sprayed out when the explosive mixture in the outer shell explodes does not cause the explosion of the flammable mixture outside the outer shell. In order to realize the explosion-proof performance and the explosion-proof performance of the explosion-proof shell, special requirements are required on the shape, the material, the volume, the structure and the like of the explosion-proof shell. The explosion pressure applied to the explosion-proof casing is the smallest, so the casing of the explosion-proof electric appliance is designed into a cuboid in recent years. In addition, if explosion occurs in the shell, the sprayed flame is ensured not to cause external gas explosion or coal dust explosion, and the action process is as follows: when flame propagates outwards through the joint surface gap, the temperature is reduced below the explosion ignition temperature of gas or coal dust due to heat absorption of the shell, obviously, the smaller the joint surface gap is, the larger the width is, the more remarkable the heat absorption effect is, so that certain requirements are placed on the gap, width and roughness of the joint surface, and rust prevention measures are adopted.
The explosion-proof shell of the explosion-proof electrical equipment is very heavy, so that the explosion-proof shell is high in cost and inconvenient to install, and the cost of the intrinsic safety type equipment is lower, and the added value of the product is higher. Therefore, the adoption of the intrinsic safety type equipment to replace the explosion-proof type equipment has more advantages in the underground of the coal mine. However, the present invention also provides higher requirements for performance indexes, and requires that the present invention hardware circuit can withstand specific man-made faults (such as short circuit) and cannot cause gas fire. The minimum energy required by the electric spark to ignite the gas with the concentration of 8.2% -8.5% (which is the concentration most easy to explode) is 0.28mJ, if the circuit parameters are properly selected or certain protection measures are adopted, the energy generated by the electric spark can be limited to be below 0.28mJ, then under normal operation or in the state of specified faults, the generated electric spark or the caused thermal effect cannot ignite the gas, the circuit is called an intrinsic safety type circuit, and the power consumption requirement of the intrinsic safety type circuit is generally less than or equal to 18W, and extremely high requirements are imposed on the design of a hardware circuit.
Because of special performance and power consumption requirements of the intrinsic safety type equipment, the power consumption of the current 5G base station equipment is far greater than 18W, so that the power consumption limit can be met only by cutting the channel number of the RRU and only supporting a single-mode, and the method can directly influence the large-bandwidth performance of the 5G and the universality of the equipment.
It should be noted that, in underground coal mine, in order to meet the related specifications of the international intrinsic safety type equipment, the radio frequency output power of the equipment is usually less than 6W, and the micro remote radio unit (pRRU) is a remote radio unit for indoor scenes, so that the power is small, and the related requirements of the intrinsic safety type equipment can be met.
Fig. 3 is a schematic power supply diagram of RRU equipment in a conventional 5G base station, and referring to fig. 3, in the conventional 5G base station, 127V ac is used to supply power to RRU in an explosion-proof housing. Referring back to fig. 2, in the embodiment of the present invention, an intrinsic safety power supply for a coal mine is used to supply power to pRRU10, the output of the intrinsic safety power supply is typically 12V, 18V or 24V, and the intrinsic safety power supply is used to supply power to pRRU10, so that the power consumption limitation on pRRU10 equipment can be improved. As the intrinsic safety power supply only has 4 paths of output at most, the embodiment of the invention adopts two paths of intrinsic safety power supplies to supply power for pRRU 10.
According to the embodiment of the invention, the micro remote radio unit pRRU10 is arranged in the mining intrinsic safety type base station, and comprises a first area module 110 and a second area module 120; the first intrinsic safety power supply 20 is connected with the first area module 110 and is used for supplying power to the first area module 110; the second intrinsic safety power supply 30 is connected with the second area module 120 and is used for supplying power to the second area module 120. The pRRU10 is divided into two areas, and two paths of intrinsic safety power supplies are used for supplying power to the areas respectively, so that the power consumption requirement of the intrinsic safety type base station equipment is met, and the intrinsic safety type base station equipment is adopted to replace the flameproof equipment, so that the use of an explosion-proof shell is avoided, the cost is reduced, and meanwhile, the convenience of installation is improved.
Fig. 4 is a schematic diagram of an alternative structure of the mine intrinsic safety base station in fig. 2. Referring to fig. 4, a first area module 110 is used for placing a first device, and the first device is used for performing intermediate frequency processing on signals and powering up according to time sequence; the second area module 120 is configured to place a second device, where the second device is configured to amplify the signal.
It should be noted that, a mode of supplying power to an intrinsically safe power supply is adopted for pRRU, and a higher requirement is put forward for pRRU hardware circuits, in the embodiment of the invention, when pRRU10 is divided into areas according to functions, a part of chips are considered to have requirements on power-on time sequence of the power supply, and circuits with the power-on time sequence requirements are placed in an area module so as to facilitate power-on time sequence control of the chips. pRRU10 is divided into two area modules according to the realized functions and the power-on time sequence requirement of the chip, and the power consumption of each area module is less than 18w, so that the requirement of intrinsic safety type equipment is met, and the influence of multipath power supply on the power-on time sequence of the chip is also considered.
Specifically, the first area module 110 may be referred to as an intermediate frequency circuit area, and places devices for performing intermediate frequency processing on signals and devices for powering on in a time sequence, such as SOC chips (not numbered), analog-to-digital or digital-to-analog conversion chips (not numbered), clock chips (not numbered), and radio frequency transceiver chips (not numbered).
The SOC chip and the radio frequency transceiver chip are both chips with power-on time sequence requirements, and when the SOC chip is powered on, the SOC chip may need to be powered on by the voltage VCC1, then powered on by the voltage VCC2, and finally powered on by the voltage VCC 3.
The second region module 120 may be referred to as a radio frequency circuit region, and is configured to amplify signals, such as a power amplifier (not numbered), a network port chip (not numbered), and a low noise amplifier (not numbered).
Further, the first area module 110 is further configured to place a first discrete power chip (not numbered), an input end of the first discrete power chip is connected to the first intrinsic safety power source 20, and an output end of the first discrete power chip is connected to the first device.
It should be appreciated that the first discrete power supply chip is configured to obtain the supply voltage provided by the first intrinsic safety power supply 20 and convert the supply voltage into a voltage required by the first device. In this manner, powering a first device in the first zone module 110 using intrinsic safety circuitry is achieved.
Further, the second area module 120 is further configured to place a second discrete power chip (not numbered), an input end of the second discrete power chip is connected to the second intrinsic safety power source 30, and an output end of the second discrete power chip is connected to the second device.
It should be appreciated that the second discrete power supply chip is configured to obtain the supply voltage provided by the second intrinsic safety power supply 30 and convert the supply voltage into a voltage required by the second device. In this manner, powering the second device in the second zone module 120 using intrinsic safety circuitry is achieved.
In the embodiment of the invention, pRRU10 is divided into two area modules according to the realized functions and the power-on time sequence requirement, and the first area module 110 comprises an SOC chip, an analog-to-digital or digital-to-analog conversion chip, a clock chip, a radio frequency transceiver chip and a first discrete power chip, wherein the total power consumption of the two area modules is less than 18W, and one path of intrinsically safe power supply can be adopted for supplying power; the second area module 120 includes a power amplifier, a network port chip, a low noise amplifier, and a second discrete power supply chip, where the sum of the power consumption is less than 18W, and another intrinsically safe power supply may be used to supply power. The design well solves the limitation of the power consumption of the intrinsic safety power supply and the limitation of the power-on time sequence of the single board, can expand the channel number of pRRU and support multimode, and improves the performance of 5G equipment.
Fig. 5 is a schematic diagram of another alternative structure of the mine intrinsic safety type base station in fig. 2. Referring to fig. 5, the mining intrinsic safety type base station may further include: a signal isolator 130 disposed between the first region module 110 and the second region module 120, for isolating radio frequency signals between the first region module 110 and the second region module 120; the optocoupler 140 is disposed between the first region module 110 and the second region module 120, and is configured to isolate a control signal between the first region module 110 and the second region module 120.
It should be understood that after the pRRU10 is divided into regions, the problem of signal interconnection between two region modules needs to be solved, and in order to meet the intrinsic safety type design requirement of the coal mine, signals between the two region modules need to be isolated. The signals between the first zone module 110 and the second zone module 120 are mainly radio frequency signals and control signals. In the embodiment of the invention, the scheme of the signal isolator 130 is adopted for isolating the radio frequency signals, and the scheme of the optical coupler 140 is adopted for isolating the signals with lower rates such as control signals, so that the requirements of signal transmission are met, the reflux paths between two intrinsic safety power supplies are isolated, the isolation requirements of intrinsic safety type equipment after partition power supply are met, and meanwhile, the method has the advantage of lower cost.
In order to solve the problem that severe environmental factors under a coal mine bring about the influence on the reliability of hardware equipment, and simultaneously consider the limitation of optical fiber resources under the coal mine and the convenience of station arrangement networking, a chain networking mode and an annular networking mode can be adopted when networking is carried out.
Fig. 6 is a networking schematic diagram of an embodiment of a mining intrinsic safety type base station according to an embodiment of the present invention. Referring to fig. 6, the mining intrinsic safety base station includes a BBU40 and a plurality of pRRU10, and for convenience of distinction, the plurality of pRRU10 are designated pRRU1, pRRU2, pRRU3, pRRU4, respectively. When the ring networking mode is adopted, if a certain path of optical fiber between the pRRUs 10 is disconnected, an optical module fails or the pRRUs 10 fails, switching can be initiated, and therefore the whole network interruption cannot be influenced. Taking the case that the optical fiber between pRRU2 and pRRU3 breaks down, when the optical fiber between pRRU2 and pRRU3 breaks down, the data channels will be automatically switched to two sides, the data of pRRU2 is sent to BBU40 via pRRU1, and the data of pRRU3 is sent to BBU40 via pRRU4, so that the whole network will not break. Thus, the stability of the mining intrinsic safety base station is effectively improved.
Through the design, the embodiment of the invention meets the design requirement of an intrinsic safety type circuit, removes the limitation that the number of RRU channels can be reduced and a single mode is adopted when intrinsic safety type equipment is adopted under a coal mine, and improves the performance of a 5G base station and the compatibility of the equipment.
The embodiment of the invention also provides a communication system which comprises the mining intrinsic safety type base station described in the embodiment. The structure of the mining intrinsic safety type base station of the communication system can refer to the embodiment, and is not repeated here; it can be appreciated that, because the communication system of this embodiment adopts the technical scheme of the mine intrinsic safety type base station, the communication system has all the beneficial effects described above.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (8)
1. An intrinsically safe base station for mining, comprising:
the micro remote radio unit pRRU comprises a first area module and a second area module; the first area module is used for placing first equipment, and the first equipment is used for performing intermediate frequency processing on signals and powering up according to time sequence; the second area module is used for placing second equipment, and the second equipment is used for amplifying signals;
the first area module comprises an SOC chip, an analog-to-digital or digital-to-analog conversion chip, a clock chip, a radio frequency transceiver chip and a first discrete power supply chip, the sum of power consumption is less than 18W, and one path of intrinsic safety power supply is adopted for supplying power;
the second area module comprises a power amplifier, a network port chip, a low-noise amplifier and a second discrete power supply chip, the sum of power consumption is less than 18W, and the other path of intrinsic safety power supply is adopted for supplying power;
further comprises: the signal isolator is arranged between the first area module and the second area module and is used for isolating radio frequency signals between the first area module and the second area module; the optocoupler is arranged between the first area module and the second area module and used for isolating control signals between the first area module and the second area module;
the first intrinsic safety power supply is connected with the first area module and is used for supplying power to the first area module;
and the second intrinsic safety power supply is connected with the second region module and is used for supplying power to the second region module.
2. The mining intrinsically-safe base station of claim 1, wherein the first region module is further configured to house a first discrete power chip, an input of the first discrete power chip is connected to the first intrinsically-safe power source, and an output of the first discrete power chip is connected to the first device.
3. The mining intrinsically-safe base station of claim 1, wherein the first device includes a SOC chip, an analog-to-digital or digital-to-analog conversion chip, a clock chip, and a radio frequency transceiver chip.
4. The mining intrinsically-safe base station of claim 1, wherein the second region module is further configured to house a second discrete power supply chip, an input of the second discrete power supply chip is connected to the second intrinsically-safe power supply, and an output of the second discrete power supply chip is connected to the second device.
5. The mining intrinsically-safe base station of claim 4, wherein the second device includes a power amplifier, a portal chip, and a low noise amplifier.
6. The mining intrinsically-safe base station of claim 1, further including: and a baseband processing device BBU, wherein the BBU is connected with the pRRU.
7. The mining intrinsically-safe base station of claim 6, wherein a plurality of prrus are provided, and wherein a plurality of prrus are connected to the BBU to form a ring network.
8. A communication system comprising a mining intrinsically-safe base station according to any one of claims 1 to 7.
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| CN115915501A (en) | 2023-04-04 |
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