CN107040936A - Vcehicular tunnel very low frequency communication-positioning integral system thoroughly - Google Patents
Vcehicular tunnel very low frequency communication-positioning integral system thoroughly Download PDFInfo
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- CN107040936A CN107040936A CN201710181533.8A CN201710181533A CN107040936A CN 107040936 A CN107040936 A CN 107040936A CN 201710181533 A CN201710181533 A CN 201710181533A CN 107040936 A CN107040936 A CN 107040936A
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- electromagnetic wave
- communication
- vlf
- tunnel
- low frequency
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems
Abstract
The present invention provides a kind of vcehicular tunnel very low frequency communication-positioning integral system thoroughly, belongs to tunnel communication field of locating technology.The system includes cable needed for VLF electromagnetic wave transmitting driving box, VLF electromagnetic wave emission control case, VLF electromagnetic wave reception antenna and laying coil etc..Realize that complete equipment is installed by the connection of cable, optical fiber and data wire.Reception antenna receives the VLF electromagnetic wave that emission system is launched outside tunnel in tunnel, receiving terminal is positioned while realizing electromagnetic communication, avoid in Tunnel Engineering, Conventional wireline, wireless communication method is the problem of Construction Phase can not be laid or be relocated in real time with drilling depth, once-paving realizes the function of personnel's real-time communication and track and localization inside and outside tunnel, and can guarantee that when accident occurs landslide region and command system contact it is unimpeded and can be accurately positioned personnel be stranded position, improve rescue efficiency, so as to reach scientific management reduction engineering cost and risk.
Description
Technical field
The present invention relates to highway communication field of locating technology, particularly relate to a kind of vcehicular tunnel very low frequency and communicate-determine thoroughly
Position integral system.
Background technology
The vcehicular tunnel construction period is short, each work post cross-operation, rescue and relief work efficiency after the mobility of workmen and calamity
Etc. factor, realize that the effective communication of staff in tunnel and positioning are just particularly significant using wireless electromagnetic wave technology.Reality in tunnel
When communication with positioning thoroughly because engineering-environment situation is complicated, the construction stage be not suitable for the reason such as the setting up of permanent communication base station and
It is difficult in real time.And the operation simultaneously of many work posts of highway tunnel construction, the laying of communication network is relatively difficult, and construction can be produced dry
Disturb.And personnel positioning technology need to also lay transmitting, reception device in tunnel at present, implantation of device is in Project Areas, in tunnel
Consumed in tunneling process serious.
The invention of integral system is positioned thoroughly for improving safety index and production management in underground and tunnel
Quality has highly important meaning：(1) the real-time monitoring to underground staff is realized：Ground-based administrators can be real-time
Project progress and workmen position coordinate are checked, underground construction can be instructed to work.(2) relatively low construction costs and
Higher positioning precision：Alignment system without cable and transmission line is not influenceed that stratum direct-tunnel can be penetrated by landform, geology
Inside, reduces system cost.The characteristics of the earth ability is strong is penetrated by low-frequency electromagnetic wave, it is ensured that high accuracy positioning.(3) tunnel
Road detection, Post disaster relief：Rational receiver is set on emitter, ground by being set in tunnel, ground is effectively maintained
With the reliable communication of underground.Next step is instructed by detecting current construction coordinate.Its penetrability is utilized simultaneously, is met tunnel and is applied
Emergent location requirement after unexpected storms occurs for work.It is convenient for carrying so research and development are a set of, strong antijamming capability, barrier propterty is good,
Dependable performance, positioning precision is high, and the saturating ground alignment system for implementing simple and cheap just seems very urgently and needs.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of vcehicular tunnel very low frequency, communication-positioning integration is thoroughly
System.
The system includes emission system, three parts of reception system and the earth communication, wherein, emission system includes very low frequency electricity
Magnetic wave transmitting antenna, control section and drive part, reception system include reception device, filter circuit, amplifying circuit and calculating
Machine processing unit, control section be VLF electromagnetic wave emission control case, drive part be VLF electromagnetic wave transmitting driving box,
Reception device includes VLF electromagnetic wave reception antenna；Emission system electromagnetic signals, are transmitted by the earth communication,
Reception system is received to electromagnetic wave signal., can be real while communication signal is received based on very low frequency saturating ground mechanics of communication
The monitoring of existing electromagnetic wave amplitude.The rule decayed according to electromagnetic wave amplitude with distance, can calculate earth's surface transmitting antenna and ground
Lower receiving terminal distance.By two point transmitting or 3 points of transmitting positioning, the absolute coordinate at sub-receiver end can be obtained.Range attenuation
Rule is based on biot savart's law, builds distance and amplitude relation formula, carries out location Calculation.
Wherein, VLF electromagnetic wave transmitting antenna in unicoil state arrangement at tunnel upper earth's surface, reception antenna by
Staff carries with.
VLF electromagnetic wave is realized and communicated thoroughly, directly reaches tunnel internal reception system, is relayed or other without setting
Wireless device, reception system receives communication information and electromagnetic wave amplitude data simultaneously.
Driving box main body electricity is set in the VLF electromagnetic wave transmitting driving box main body of VLF electromagnetic wave transmitting driving box
Press adjusting knob, driving box main body power switch, driving box main body AC power interface, driving box main coil interface and driving
Box main body optical fiber interface.
Control box main body light is set in the VLF electromagnetic wave emission control box main body of VLF electromagnetic wave emission control case
Fine interface and control cabinet host computer interface.
VLF electromagnetic wave transmitting driving box main body is metal shell, can prevent electrostatic from avoiding potential safety hazard；Very low frequency
Electromagnetic wave controls box main body and VLF electromagnetic wave to receive antenna body for plastic casing, and small volume lighter weight is easy to tear open
Unload and carry.
VLF electromagnetic wave emission control case provides control signal to logic control circuit so that logic control circuit is generated
Full-bridge control signal, VLF electromagnetic wave transmitting driving box produces 3KHz alternating current, alternating current is passed through transmitting antenna
Launch alternating electromagnetism ripple into space.
Reception antenna main body is set to calculate in the VLF electromagnetic wave reception antenna main body of VLF electromagnetic wave reception antenna
Machine interface；VLF electromagnetic wave reception antenna, which obtains electric field and magnetic field energy from electromagnetic field and is converted into voltage, electric current, to be believed
Number feeding reception system carry out subsequent treatment.
VLF electromagnetic wave transmitting antenna uses copper core, the electric current that drive module is produced is sent out by VLF electromagnetic wave
Antenna is penetrated to launch.
Filter circuit is used for filtering the High-frequency Interference noise around equipment；Amplifying circuit can strengthen what receiving terminal was received
Signal, distinguishes useful signal and interference signal.
Computer processing unit can carry out Data Analysis Services to different frequency range electromagnetic wave.According to biot savart's law and
Transmitting antenna physical location obtains send-receive relative distance, and obtains receiving terminal absolute coordinate according to multiple antennas network analysis,
Realize positioning.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The system can be avoided in Tunnel Engineering, and Conventional wireline, wireless communication method can not be laid in Construction Phase
Or the problem of relocated in real time with drilling depth, once-paving realizes the function of personnel's real-time communication and track and localization inside and outside tunnel, management
Personnel can carry out communicating and positioning in time to the staff in tunnel at any time outside tunnel, can in time grasp and be worked in tunnel
The distribution of personnel and handling situations, enter the safety management of administrative staff, and landslide region and command system are can guarantee that when a fault occurs
Contact it is unimpeded and can be accurately positioned personnel be stranded position, improve rescue efficiency so that reach scientific management reduce engineering into
Sheet and risk.
Brief description of the drawings
Fig. 1 is vcehicular tunnel very low frequency of the invention communication-positioning integral system operation schematic diagram thoroughly；
Fig. 2 is vcehicular tunnel very low frequency communication-positioning integral system positioning schematic diagram thoroughly；
Fig. 3 is vcehicular tunnel very low frequency communication-positioning integral system space arithmetic coordinate schematic diagram thoroughly；
Fig. 4 is VLF electromagnetic wave transmitting driving box in vcehicular tunnel very low frequency thoroughly communication-positioning integral system
Structural representation；
Fig. 5 is VLF electromagnetic wave emission control case in vcehicular tunnel very low frequency thoroughly communication-positioning integral system
Structural representation；
Fig. 6 is VLF electromagnetic wave reception antenna structure in vcehicular tunnel very low frequency thoroughly communication-positioning integral system
Schematic diagram；
Fig. 7 is positioning analysis schematic flow sheet in the embodiment of the present invention.
Wherein：1- VLF electromagnetic waves transmitting driving box main body；2- driving box body voltage adjusting knobs；3- driving box masters
Body power switch；4- drives box main body AC power interface；5- driving box main coil interfaces；6- driving box main body optical fiber connects
Mouthful；7- VLF electromagnetic wave emission control box main bodies；8- controls box main body optical fiber interface；9- control cabinet host computer interfaces；
10- VLF electromagnetic wave reception antenna main bodys；11- reception antenna host computer interfaces.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of vcehicular tunnel very low frequency communication-positioning integral system thoroughly.
As shown in figure 1, the system includes emission system, three parts of reception system and the earth communication, wherein, emission system bag
VLF electromagnetic wave transmitting antenna, control section and drive part are included, reception system includes reception device, filter circuit, amplification
Circuit and computer processing unit, control section are that VLF electromagnetic wave emission control case, drive part are VLF electromagnetic wave
Launching driving box, reception device includes VLF electromagnetic wave reception antenna；Emission system electromagnetic signals, it is logical by the earth
Letter is transmitted, and reception system is received to electromagnetic wave signal.
Driven as shown in figure 4, being set in the VLF electromagnetic wave transmitting driving box main body 1 of VLF electromagnetic wave transmitting driving box
Dynamic box main body voltage-regulation knob 2, driving box main body power switch 3, driving box main body AC power interface 4, driving box main body
Coil interface 5 and driving box main body optical fiber interface 6.
As shown in figure 5, setting control in the VLF electromagnetic wave emission control box main body 7 of VLF electromagnetic wave emission control case
Box main body optical fiber interface 8 and control cabinet host computer interface 9 processed.
Received as shown in fig. 6, being set in the VLF electromagnetic wave reception antenna main body 10 of VLF electromagnetic wave reception antenna
Antenna body computer interface 11.
System principle in actual application is as follows：
(1) selection 3KHz is used as very low frequency saturating ground communication frequency band, configuration associated transmissions, receiving device.
Formation characteristics are penetrated according to electromagnetic wave, selection 3KHz frequency ranges are used as transmitting, receives frequency.According to this technical indicator,
It is determined that transmitting equipment is：Emission control part uses the STM32F103ZET6 model single-chip microcomputers that TI companies produce, and it is to be based on
32 8-digit microcontrollers of ARM Cortex-M3 cores, are encapsulated using LQFP-144, and maximum operating frequency is 72MHz, its CPU behaviour
Make voltage range for 2.0-3.6V；Launch the full-bridge circuit that drive part uses independent research, it can produce 3KHz alternation electricity
Stream；VLF electromagnetic wave transmitting antenna is by 95mm2Copper core cable, cable length 80m, i.e. transmitting coil radius are 12.73m.
Transmission signal produces 3KHz alternating current using the full-bridge circuit of independent research, is run through transmitting antenna and launches into space
Alternating electromagnetism ripple mode.Receiving device is：Reception antenna uses the magnetic rod antenna with FERRITE CORE of independent research, its work
Frequency is 300-3kHz, and operating temperature can meet the requirement positioned with being carried out in tunnel at -30 DEG C to+70 DEG C；Filtering
The chip of circuit uses the active power filtering chip MAX274AEWI that MAXIM companies produce, and its maximum operation frequency is 10MHz, work
Make voltage for+5V or ± 5V, central frequency range is 100Hz~150KHz.Amplifying circuit uses LT1028 in amplifying circuit
Chip, its supply voltage be ± 5V~± 20V, switching rate is 15V/ns, and noise density is 0.9nV；Computer disposal list
Member uses Creative sound cards, and the signal that receiving circuit is received is converted into audio signal and is acquired by Matlab.
(2) transmitting antenna positioning and laying
3 antenna launch points are chosen on tunnel line and carry out networking, transmitting spacing is chosen as 100 meters or so.Using complete
Instrument of standing is surveyed and sets and record launch point position, and is marked using concrete stake.
(3) signal scaling
The customized saturating earth signal of equipment can transmit 500 meters.Communication signal demarcation can part driving chamber in carry out or
Carried out in adjacent engineering chamber.Communication signal signal to noise ratio is debugged first, and screening filter is made an uproar option, obtains clear communication signal.
Receiver selects the magnetic rod antenna with FERRITE CORE using independent research, and its working frequency is 300-3kHz,
Operating temperature can meet the requirement positioned with being carried out in tunnel at -30 DEG C to+70 DEG C, be sat during demarcation in tunnel internal
Emplacing receiver on the known measuring point of mark.Receiver top straight down, ensures that reception antenna perpendicularity (show by its positioning using sash weight
Intention is shown in Fig. 2), then carry out the reception of electromagnetism wave amplitude intensity.Then according to location algorithm, calculate measuring point coordinate and with transmitting
Antenna relative error.
(4) personnel positioning equipment is run, and personnel wear receiving terminal when entering tunnel.Transmitting antenna, setting signal transmitting
Interval, receiving terminal obtains positioning signal in real time, and is transmitted to control room by saturating ground communication signal；
(5) control indoor positioning analysis system according to be transmitted back to come data signal, computing staff's receiver position, and showing
Show in tunnel model figure, location information real-time update.(positioning analysis flow is shown in Fig. 7)
Location algorithm uses biot savart's law in the system, using 3KHz VLF electromagnetic waves, VLF electromagnetic wave
Transmitting antenna be the electric current loop for being connected with alternating current, its Distribution of Magnetic Field can be solved by biot savart's law.
Calculated using circular cylindrical coordinate, then current loop model such as Fig. 3：
It is located in the annulus that radius is R by electric current I counterclockwise, A (R, α, the 0) points on electric current loop take an electric current
Member, thenP point coordinates wherein in space isUnit vector is in spaceThen P points are relative to the position vector of A points：
Can obtain current elements in the magnetic field that P points are produced according to above formula is：
Therefore each component of space magnetic field can be drawn according to biot savart's law：
Integration on 0 to 2 π is carried out to α, obtained：
In order to calculate the integration above and below cylindrical coordinates, orderThen d α=d γ, above formula can be converted into：
It is wherein rightFirst processing is changed in progress, makes γ=π-θ, then d γ=- d θ, then
Wherein integrating range is symmetric interval, and integrand is the odd function on θ, thereforeIn electric current loop
Far-field region, due to ρ ＞ ＞ R, therefore point P in space is much larger than the radius of electric current loop to the distance at electric current loop center, therefore
Then：
The conversion formula of circular cylindrical coordinate and rectangular co-ordinate is：
And willBring into, obtain
Above formula is exactly expression formula of the VLF electromagnetic wave under rectangular coordinate system, and above formula is conducive to our quantitative analysis spaces
The magnetic field intensity of each point, is determined by experiment the amplitude of all directions, can uniquely determine the point in space, be for positioning thoroughly
System has theoretic directive significance.
The applicable territorial environment condition of the system：Plain, hills, mountain region, plateau band.Applicable meteorological condition：Cloudy day,
Blow, light rain.Applicable geological conditions：Without rock grade intensity requirement, the rock of cranny development, the rock stratum containing underground water with
And the rock stratum rich in fault fold on this product without influence.
The system is installed into application using following steps：
First, VLF electromagnetic wave is launched into driving box, control cabinet to be placed on flat ground, forbids to be placed on ponding
Ground on；
2nd, cable is being laid to diameter about 17m or so circle above the rock stratum that tunnel passes through in designated area
(shape is as close as circle), the two ends of coil are connected at VLF electromagnetic wave transmitting driving box connection jaws respectively, with pulling
Hand firmly connects it；
3rd, VLF electromagnetic wave is launched by six roots of sensation optical fiber by driving box and control cabinet is attached, making sure to keep in mind optical fiber can not
Firmly doubling, is firmly connected in strict accordance with corresponding coding A, B printed words of connection jaws, in order to avoid cause loose contact to influence signal
Transmitting；
4th, VLF electromagnetic wave emission control case and computer are connected by data wire；
5th, after the installation of tunnel top equipment, there are personnel that VLF electromagnetic wave is received into antenna and bring into tunnel, will connect
Receive antenna and oscillograph is connected, to be handled with care because antenna structure is elongated；
6th, after the completion of above step, VLF electromagnetic wave transmitting driving box is connected with 220V AC powers；
7th, after the completion of complete equipment is by step connection, the frequency of transmission is regulated on computers, in VLF electromagnetic wave
Receiving antenna and can just receive hair in voltage corresponding to frequency, tunnel is regulated on transmitting driving box voltage-regulation knob
The signal of coil transmissions is penetrated, the effect of staff in tunnel positioning is reached, the work of communication can be reached by the transmission of speech text
With.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of vcehicular tunnel very low frequency communication-positioning integral system thoroughly, it is characterised in that：Including emission system, receive
Three parts of system and the earth communication, wherein, emission system includes VLF electromagnetic wave transmitting antenna, control section and drive division
Point, reception system includes reception device, filter circuit, amplifying circuit and computer processing unit, and control section is very low frequency electricity
Magnetic wave emission control case, drive part include VLF electromagnetic wave and received for VLF electromagnetic wave transmitting driving box, reception device
Antenna；Emission system electromagnetic signals, are transmitted, reception system connects to electromagnetic wave signal by the earth communication
Receive.
2. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
VLF electromagnetic wave transmitting antenna is stated in unicoil state arrangement at tunnel upper earth's surface, reception antenna is carry-on by staff
Carry.
3. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
State VLF electromagnetic wave realization to communicate thoroughly, directly reach tunnel internal reception system, reception system receives communication information simultaneously
With electromagnetic wave amplitude data.
4. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
Driving box body voltage is set to adjust in the VLF electromagnetic wave transmitting driving box main body (1) for stating VLF electromagnetic wave transmitting driving box
Save knob (2), driving box main body power switch (3), driving box main body AC power interface (4), driving box main coil interface
(5) and driving box main body optical fiber interface (6).
5. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
State and set control box main body optical fiber to connect in the VLF electromagnetic wave emission control box main body (7) of VLF electromagnetic wave emission control case
Mouth (8) and control cabinet host computer interface (9).
6. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
It is metal shell, VLF electromagnetic wave control box main body (7) and very low frequency electricity to state VLF electromagnetic wave transmitting driving box main body (1)
Magnetic wave receives antenna body (10) for plastic casing.
7. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
State VLF electromagnetic wave emission control case and provide control signal to logic control circuit so that logic control circuit generates full-bridge control
Signal processed, VLF electromagnetic wave transmitting driving box produces 3KHz alternating current, makes alternating current by transmitting antenna to space
Middle transmitting alternating electromagnetism ripple.
8. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
State and reception antenna host computer is set in the VLF electromagnetic wave reception antenna main body (10) of VLF electromagnetic wave reception antenna
Interface (11)；VLF electromagnetic wave reception antenna obtains electric field and magnetic field energy from electromagnetic field and is converted into voltage, electric current
Signal feeding reception system carries out subsequent treatment.
9. vcehicular tunnel very low frequency according to claim 1 communication-positioning integral system thoroughly, it is characterised in that：Institute
State VLF electromagnetic wave transmitting antenna and use copper core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710181533.8A CN107040936B (en) | 2017-03-24 | 2017-03-24 | Highway tunnel very low frequency ground communication-location integrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710181533.8A CN107040936B (en) | 2017-03-24 | 2017-03-24 | Highway tunnel very low frequency ground communication-location integrated system |
Publications (2)
| Publication Number | Publication Date |
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| CN107040936A true CN107040936A (en) | 2017-08-11 |
| CN107040936B CN107040936B (en) | 2020-12-18 |
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| CN201710181533.8A Expired - Fee Related CN107040936B (en) | 2017-03-24 | 2017-03-24 | Highway tunnel very low frequency ground communication-location integrated system |
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| CN108365325A (en) * | 2017-12-28 | 2018-08-03 | 中国电子科技集团公司第二十研究所 | A kind of low frequency navigation miniaturization magnetic array |
| CN110926457A (en) * | 2019-11-08 | 2020-03-27 | 北京交通大学 | Noise reduction method of through-the-earth positioning signal based on frequency point amplitude acquisition |
| CN111628829A (en) * | 2019-02-28 | 2020-09-04 | 北京信息科技大学 | Method and device for node equipment for tunnel communication |
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| CN113567920A (en) * | 2021-06-17 | 2021-10-29 | 中铁第四勘察设计院集团有限公司 | Three-dimensional positioning method for underground space |
| CN115395203A (en) * | 2022-07-29 | 2022-11-25 | 承德石油高等专科学校 | Very low frequency electromagnetic wave antenna and method for transmitting electromagnetic wave |
| CN115426001A (en) * | 2022-09-09 | 2022-12-02 | 伟卓石油科技(北京)有限公司 | Portable mobile low-frequency ground-penetrating emergency communication device and use method thereof |
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