CN202773082U - Device for underground communication and staff monitoring based on time division and long term evolution (TD-LTE) technology - Google Patents
Device for underground communication and staff monitoring based on time division and long term evolution (TD-LTE) technology Download PDFInfo
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Abstract
The utility model relates to a device for underground communication and staff monitoring based on the time division and long term evolution (TD-LTE) technology. The device comprises mobile terminals, a relay station, a communication base station, a location server, a switchboard, a core network device, host computers, and transmission lines. The mobile terminals, the nodes of underground base stations and the location server are connected with each other through wireless interfaces to form a trinity communication monitoring environment. The switchboard gathers the nodes of a plurality of underground base stations through optical fibers, and then connects the gathered nodes of the underground base stations with a ground base station. The ground base station is accessed to a public switched telephone network through the core network device. The main transmission channels of the device adopt wired optical fibers and the wireless channels of the device adopt the orthogonal frequency-division multiple access technology and the multiple-input multiple-output modulation technology. An original underground monitoring positioning algorithm is improved by using a mixed measurement mode of signal transmits-receive time measurement and angular measurement. The information on the positions of underground staff is obtained by using a circle coordinate setting method. Due to the adoption of the improved device and the improved algorithm, the problems of difficulties of high quality communication and monitoring positioning under complex and harsh conditions in mines are effectively solved.
Description
Technical field
The utility model relates to a kind of communication monitoring device, and specifically a kind of underground communica tion and personnel's monitoring device based on the TD-LTE technology belong to the technical field of mobile communication.Be specially adapted to the mensuration of the communication of staff under the coal mine and positional information.This communication monitoring device comprises portable terminal, relay station, communication base station, location-server, switch, equipment of the core network, host computer and transmission line.
Background technology
The in recent years methods research for colliery underground mobile communication and monitoring has been subjected to widely concern, and the traditional underground communica tion and the monitoring mode that relatively fall behind can't satisfy modernized requirement.Most of inductive communication device, leaky feeder communication device and the system for mine personal handphone communicator etc. of adopting of the underground communica tion device that exists at present; To personnel in the pit's the monitoring mensuration mainly for personnel position coordinate.But above-mentioned existing communication and monitoring device are applied to the down-hole part that still has some deficits.At first, the communicator functional structure is comparatively simple, fails to reach the standard of quality digital mine, and main manifestations is: speech postpones obviously, and carrier bandwidths is narrower to cause large capacity documents transmission speed limited; The radio-frequency antenna throughput is little, and radiation scope can not cover all personnel to be measured, and cell edge blind area phenomenon is particularly serious; It is synchronous that keeping system is failed in the minizone, has the comparatively serious problems such as information transmit-receive dislocation.Secondly, the mensuration of down-hole personnel position coordinate is only limited to the monitoring of fixing point position, the location-server that is used for monitoring is antistatic poor with electromagnetic interference force; The coordinate measuring algorithm is single, and the personnel's coordinate data error that records is larger, in case the down-hole has an accident, the inaccuracy location can directly affect carrying out smoothly of rescue work.Time-division Long Term Evolution (TD-LTE) technology is shown one's talent from numerous communication technologys with advantages such as the network architecture of its low transmission time delay, high transfer rate, optimization, large carrier bandwidths and large capacities, and its main feature has well solved the problem of communicating by letter under the complicated mal-condition in the mine and monitoring difficulty.Therefore, a kind of new personnel in the pit's communication and monitoring device based on the TD-LTE technology of research is imperative.
Chinese patent application numbers 200920112969.2, an open day 2009.12.30 discloses a kind of Mine Communication mobile phone with a key intercommunication function.Comprise shell, in order to power management module that power supply is provided to device, be used for realizing communication function central control module, be used for data being sent or the wireless communication module of received RF signal and be used for the speech processing module of the speech data of control headset by wireless radio-frequency.This mobile phone can strengthen intercommunication function, possess a key intercommunication function button, but weak point is that this apparatus structure simple functions is single, can't realize the many demands expansions of underground communica tion multi-service; And what adopt in the radio-frequency module is the single antenna design, will cause this mobile phone speech quality under the adverse circumstances of down-hole low, and suffered presence of intercell interference is serious, practical application.
Chinese patent application numbers 200710057432.6, an open day 2008.11.26 discloses the communications cable that a kind of personnel in the pit of being exclusively used in locates use.This cable is including the some locating information receiving nodes of power supply distribution connectivity port, and cable adopts 6 core cables at least.This cable can be changed into compound communication cable, realizes the usefulness of replacing of original cable.Also can be according to the actual requirements, in the scope of each detector segments of down-hole, select the interval between the receiving node connectivity port, location on the communications cable, realize dynamically adjusting the demand of positioning accuracy, and the installation by location receiving node device, thereby location and the communication of on the completed well and down-hole.Weak point is that the anti-external damage power of this communications cable is poor, slightly there is breakage will cause communication disruption, can't adapt to communication and communication in the complex environment of down-hole, especially when gas explosion accident occured in the down-hole, the ore that is burning that drops can be pounded cable disconnected or melt down and consequently can't use moment.And being confined to determine about the personnel positioning aspect whether fixing point coordinate place, down-hole exists the staff, the personnel that can not obtain leave the particular location behind this some position, do not separate the root problem of decision bit.
Given this, under the current coal mine in the urgent need to a kind of new radio communication and personnel's monitoring device.The utility model improves existing communication device and monitoring algorithm, and the device after will improving and algorithm application are in the mensuration of underground work personnel communication and positional information.
Summary of the invention
Poor for the anti-external damage power that overcomes wire communication location, existing down-hole cable, Continuation is low, and rear easily the pounding that have an accident broken or meltdown; Radio communication device function singleness simple in structure under the existing well, the low rate high latency, the blind area phenomenon is serious, the mensuration precision of personnel positions monitoring algorithm is low, measuring range is little, the shortcomings such as poor robustness, the utility model provide a kind of radio communication monitoring device and algorithm, specifically a kind of underground communica tion monitoring device and personnel positioning algorithm based on the TD-LTE technology.By introducing the technology such as OFDM access and multiple-input and multiple-output device is optimized, reduces the user's communication time delay and improve simultaneously message transmission rate and properties; Location algorithm is improved to the hybrid measurement pattern of signal transmitting and receiving time measurement and angular surveying, thereby accurately calculate the down-hole personnel position coordinate by obtaining echo time of transmitting and two parameters of angle of smart antenna receiver signal, significantly improve positioning accuracy, realize high-quality wireless communication, transfer of data and the personnel positions information monitoring of complex condition.
The technical solution adopted in the utility model is:
A kind of underground communica tion and personnel's monitoring device based on the TD-LTE technology comprise portable terminal, relay station, communication base station, location-server, switch, equipment of the core network, host computer and transmission line; Device backbone transport passage adopts wired Optical Fiber Transmission, adopts simultaneously the mode flexible configuration transmission bandwidth of carrier aggregation, realizes graph image and the video call service demand of underground moving terminal; Transmission of wireless signals adopts the OFDM access technology, thereby the wave beam forming technology that is used in conjunction with smart antenna satisfies large throughput high speed data transfer business, realizes the seamless covering in underground radio communication zone, improves the performance of Cell Edge User; Underground radio communication adopts Radio Access Network, and wave point is supported the multiple standards communication interface, and possesses backward compatible ability.
Described underground communica tion and personnel's monitoring device, communication base station comprises down-hole base-station node and ground base station; Equipment of the core network comprises data access server and data authentication server; Host computer comprises host computer PC, central host computer PC and Servers-SQL Server; Transmission line comprises RS485 standard traffic bus and optical fiber; Wherein portable terminal, relay station, down-hole base-station node, location-server and switch are positioned at the down-hole, and ground base station, equipment of the core network and host computer are positioned at aboveground; Link to each other by wireless transmission interface between portable terminal and down-hole base-station node and the location-server three, consist of down-hole Trinity communication monitoring environment, switch converges rear unification by optical fiber with the some base-station nodes in down-hole and links to each other with ground base station, ground base station accesses to Public Switched Telephony Network by equipment of the core network, realizes communicating by letter and transfer of data between underground work personnel and ground staff; Location-server reaches host computer PC with the portable terminal measured and the distance between the base-station node of down-hole and relative angle value by RS485 standard traffic bus, host computer PC gathers uploading data and according to the portable terminal unique identifier every underground work personnel is distinguished, calculate personnel in the pit position coordinate according to distance and angle-data, and be the acquisition time of coordinate information interpolation correspondence, the coordinate information unification is deposited among the Servers-SQL Server, finished the monitoring on time and space to the underground work personnel.
Described underground communica tion and personnel's monitoring device, wireless transmission interface adopt TD-LTE and the design of LTE-Advanced dual mode interface.
Described underground communica tion and personnel's monitoring device, the radio-frequency module of down-hole base-station node and portable terminal all adopt the consensus standard standard that meets 3GPP TS36.1xx series, and radio-frequency antenna adopts many smart antennas to be used for the data-signal transmission.
Described underground communica tion and personnel's monitoring device, consider that the existing apparatus monitoring algorithm is comparatively fuzzy to the mensuration of workmen position under the coal mine, the hybrid measurement pattern that proposes use signal transmitting and receiving time measurement and angular surveying will have location algorithm now and improve, and significantly improve positioning accuracy.
Described underground communica tion and personnel's monitoring device all are connected by relay station between underground communica tion base station, switch and the equipment of the core network of device.
Described underground communica tion and personnel's monitoring device, the complicated adverse circumstances in consideration down-hole are eated dishes without rice or wine to dock synchronous mode between the employing base station down-hole base-station node are carried out system synchronization the impact of base station synchronization.
Described underground communica tion and personnel's monitoring device, location-server comprises with lower module: microcontroller module, redundancy check module, data processing and memory module, radio-frequency module, keyboard input module, display module, time slot counting module, and the 220V AC power that burning voltage is provided; Device housings reliably is connected with PE line multiple spot, consists of electric loop with the earth, has played the effect of anti-electromagnetism and electrostatic interference.
Described underground communica tion and personnel's monitoring device, use MAX488E as the transceiver of RS485 bus communication interface, data processing and memory module to location-server are carried out Interface design, and the distance that this module is calculated reaches in the host computer PC of ground by bus in real time with angle value.
Described underground communica tion and personnel's monitoring device, by a central host computer PC all the other host computer PC unified monitoring are managed, personnel in the pit's coordinate information is all deposited among the Servers-SQL Server, thereby personnel in the pit's distribution situation and travel track carried out comprehensively effectively management.
Described underground communica tion and personnel's monitoring device, portable terminal, relay station, down-hole base-station node, location-server and switch are inbeing safe explosion prevention equipment.
The utility model has following 4 beneficial effects.
Rational in infrastructure, accuracy is high.The equipment that the utility model is used for underground communica tion mainly is made of portable terminal, down-hole base-station node and ground core network three large agent structures, and the network architecture is flattening more, can effectively reduce data transmission delay and reduce simultaneously maintenance cost, and is rational in infrastructure; Original down-hole positioning distance measuring algorithm is improved, use signal transmitting and receiving time measurement and the hybrid measurement pattern Accurate Measurement down-hole base-station node of angular surveying and spacing and the relative angle of portable terminal, use the circumferential coordinates positioning mode and obtain down-hole personnel position information, accuracy is high.
2. rapidly and efficiently.The utility model adopts the wireless transmission modulation techniques such as OFDM access and multiple-input and multiple-output, thereby adopts simultaneously the mode flexible configuration carrier bandwidths of carrier aggregation to satisfy large throughput high speed data transfer business; The location-server of monitoring device processes by data and memory module is calculated portable terminal and down-hole base-station node spacing, the result who draws is reached the ground host computer PC real-time together with angle parameter, host computer PC is uploaded the position coordinate value that the parameter result gathers every underground work personnel of rear one-time calculation with all, rapidly and efficiently.
3. Continuation is strong.All be connected by relay station between the communication base station of the utility model monitoring device, switch and the equipment of the core network, can realize the remote communication in down-hole and information relay; Eat dishes without rice or wine to dock synchronous mode between the employing base station down-hole base-station node is carried out system synchronization, in guarantee information transmission accuracy, utilize air interface effectively each base-station node to be carried out synchronization, need not to use wired connection, dispose flexible Continuation strong.
4. robustness is good.The utility model is used for the location-server shell that positional information measures and reliably is connected with PE line multiple spot, consists of electric loop with the earth, and the inaccurate phenomenon of measurement that causes because of electromagnetism (EMC) and static (ESD) interference can be effectively protected in this measure.In addition, the radio-frequency module of portable terminal and down-hole base-station node adopts many smart antenna designs, being used in conjunction with the wave beam forming technology can be to greatest extent, multi-angle, obtain every personnel in the pit's positional information exactly, does not interfere with each other between personnel and personnel, and robustness is good.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the fundamental diagram of the utility model device.
Fig. 2 is the circuit structure diagram of down-hole base-station node.
Fig. 3 is that the down-hole base-station node eats dishes without rice or wine to dock synchronous schematic diagram.
Fig. 4 is personnel's Monitoring and Positioning schematic diagram.
Fig. 5 is the location-server circuit structure diagram.
Fig. 6 is TMS320C5X chip and host computer PC interface circuit figure.
1. portable terminals among the figure, 2. down-hole base-station node, 3. relay station, 4. location-server, 5. switch, 6. tunnel wall, 7. underground work personnel, 8. mine locomotive, 9.RS485 standard traffic bus, 10. ground base station, 11. equipments of the core network, 12. host computer PC, 13. central host computer PC, 14. Public Switched Telephony Network, 15. Servers-SQL Server, 16. optical fiber.
Embodiment
In the embodiment shown in fig. 1, the utility model device tunnel wall (6) on every side in accordance with regulations good coordinates regional fixedly Mine-used I. S down-hole base-station node (2) and location-server (4) are installed, consist of an area monitoring point together with portable terminal (1) three.Location-server and down-hole base-station node are powered by the down-hole power transmission cable, keep level with ground, tunnel and near placing around the wall, avoid taking that the tunnel main road affects Underground Mine locomotive (8) and other transporting equipments are advanced; Location-server (4) antenna end is towards the tunnel main road, guarantees that the aerial radiation scope can cover the underground work personnel (7) of construction operation around main tunnel and the Underground Mine locomotive.Every staff all is equipped with portable terminal (1) and is used for communication and transfer of data, a regional base-station node (2) but according to the some portable terminals of its bearing capacity Coverage Control and location-server, behind all location-servers (4) electrification reset, down-hole base-station node (2) is by portable terminal (1) and location-server (4) in the scope of smart antenna (207) emission high-frequency electric wave search place; Portable terminal is opened query function, near the effective search signal that whether exists base-station node to send the inquiry simultaneously.After inquiring the high frequency search signal of base-station node (2) emission, portable terminal (1) then sends with down-hole base-station node (2) and sets up the application signal of communicating by letter, the application signal is 40 local identification codes in the terminal unique identifier, this code comprises 8 underground work personnel (7) job numbers and 32 terminal IC chip serial number, behind the affirmation connection signal that As-received tiny node (2) returns, then set up effective communication connection, the unique identifier that location-server (4) also sends mobile terminal receive (1) is guaranteed the accurate corresponding of every underground work personnel (7) and its position coordinates measurement result.Communicate session connection by the LTE Radio interface protocols between base-station node, location-server and the portable terminal three, consist of down-hole Trinity communication monitoring environment, wherein terminal is connected by X2 interface with terminal room; Be connected by the S1 interface between terminal and location-server and upper-level BTS.The down direction of data transmission channel adopts the modulation system of OFDM access (OFDM), and up direction adopts the modulation system of the DFT-s-OFDM with single carrier peak-to-average force ratio feature; Simultaneously, up link is used synchronous non-adaptive hybrid automatic repeat request technology, and down link adopts asynchronous adaptive mixed automatic retransfer technology; Cooperate the transmission rate that adopts the adaptive modulation and coding technology to improve link, can realize the low voice call that postpones and the communication function of exchange of rapid rate.Because the long and narrow depth of underworkings, the antenna for base station limited coverage area uses relay station equipment (3) that the base-station node in the zones of different piece (2) is connected so that install Continuation stronger, the realization remote communication in down-hole and information relay.Down-hole base-station node (2) connection of each residential quarter converges to down-hole switch (5), reach ground base station (10) by optical fiber (16) afterwards, be connected to data access server and the data authentication server end of equipment of the core network (11) by ground base station (10), link to each other with Public Switched Telephony Network (14) afterwards and finish information interactive process, realize that the down-hole communicates by letter and transfer of data with personnel between aboveground.After having set up being connected of location-server (4) and portable terminal (1), location-server sends the read data order by a day alignment portable terminal, portable terminal receives the reading data signal of location-server emission, make and 64 unique identifiers and chip operation parameter are reflected back location-server (4) after replying, the echo-signal of location-server receiving terminal is also carried out rectification, extract the carrier information that portable terminal transmits, carrier information comprises portable terminal (1) identification code, underground work personnel (7) job number and chipset parameter, and portable terminal (1) signal arrives the transmission time of down-hole base-station node (2), present position angle information when meanwhile base-station node (2) will provide with communication of mobile terminal to location-server (4).Location-server carries out data operation with the time parameter that extracts by data processing chip TMS320C5X (504), calculate the distance values of every underground work personnel (7) and base-station node (2), pitch information is backed up externally among the data storage EEPROM (505), simultaneously distance values and angle value are reached in the host computer PC (12) in real time by RS485 standard traffic bus (9), the data that host computer PC (12) is uploaded all location-servers (4) gather, by portable terminal (1) unique identifier every underground work personnel (7) are distinguished, the distance values that identification code is identical and angle value are used the circumferential coordinates positioning mode and are carried out position coordinates calculating, thereby finally draw every underground work personnel's (7) position coordinates, and by automatically for this reason corresponding acquisition time and the storage of coordinate information interpolation of management software, realized the position monitoring on time and space to the personnel in the pit.Because the difference of underworkings construction location, the personnel positions information of the host computer PC of each measurement point (12) storage is also different, by a central host computer PC (13) all host computer PC (12) are unified to carry out monitoring management, the information data unification is deposited among the Servers-SQL Server (15), thereby personnel in the pit's distribution situation and travel track carried out comprehensively effectively management.
In embodiment illustrated in fig. 2, the down-hole base-station node adopts ARM Cortex A15 (201) chip as processor core circuitry, signal source is carried out the OFDM modulation through baseband processing unit and digital signal processor TMS320C6416 (202) chip of core processor, use carrier aggregation technology that the mode of a plurality of member carriers with series connection coupled together, so that the device bandwidth extensibility of OFDM multi-access mode is more flexible.Modulator CMX7041L4 (203) chip is modulated the technical finesses such as mapping, linear predictive coding and wave beam forming with the coding of portable terminal (1) answer signal, thereby modulation code word is reached the weight coefficient that antenna end is adjusted each array element in the aerial array, generation has the wave beam of directive property, has enlarged the antenna for base station radiation scope.Base station controller BSC (204) embedded inside of base station so that the more flattening of whole apparatus structure, base station controller will finish the wireless channel management, implement to call out and foundation and the dismounting of communication link.Adopt EEPROM (205) as data storage, the device parameter and the portable terminal unique identifier that are used for the storage base station, unique identifier is so that every underground work personnel's (7) positional information can accurately be identified and store to location-server (4) and host computer PC (12).Radio-frequency module adopts RFM12 (206), in order to realize to greatest extent, multi-angle, to read every miner's positional information exactly, use 4 smart antennas (207) parallel way as the radio-frequency module transmitting terminal, prevention at radio-frequency port all adopts the consensus standard standard that meets 3GPP TS36.1xx series to set, wireless transmission interface adopts TD-LTE (208) and the design of LTE-Advanced (209) dual mode interface, and supports backward compatible function.Corresponding portable terminal and location-server radio-frequency head also will be designed to many antenna forms, thereby form the downhole wireless transmission modulating mode of multiple-input and multiple-output, cooperate the OFDM modulation technique can satisfy the larger high speed data transfer of the throughputs such as downhole video conversation, image/video transmission and large capacity documents transmission professional.All down-hole base-station nodes all provide relay station equipment interface (210) in addition, all are connected by relay station between the base-station node of zones of different, have effectively ensured the ability of the remote communication in down-hole and information relay.Each regional base-station node of down-hole links to each other with switch (5) after converging by optical fiber interface (211), then is connected to ground communication facilities, thereby makes underground moving terminal and ground based terminal keep voice to be connected and transmission with the effective of data.The random number of randomizer RNG (212) unit generation is set the initial value of timer MT8980D (213), make with the initial value of setting and to reply, thereby the mutual collision that causes when preventing a plurality of portable terminals simultaneously with base station communication, timer also for the time interocclusal record of the docking operation of eating dishes without rice or wine between the base station, is adjusted synchronised clock according to the time difference parameter of record.Clock generator RTM360-111R (214) chip is used for providing stabilizing clock to core processor ARM Cortex A15 (201) chip, modulator CMX7041L4 (203) and base station controller BSC (204), and from location-server (4) lower sends instructions the extraction synchronizing clock signals.
In the embodiment shown in fig. 3, location-server sends synchronizing signal (301) to the down-hole base-station node around it, the down-hole base-station node is made and is replied and echo-signal is reached the ground host computer PC by location-server, host computer PC is chosen at random two base-station nodes and is carried out local synchronization, issues synchronic command and begins local synchronization (302).Location-server is placed two selected base station line mid points (303), send simultaneously signal lock in time to two base-station node A and B afterwards, base-station node is with [τ
1, τ
2... τ
n] form record respectively and receive single frame signal required time, wherein τ is the time of received frame signal, receives two base stations after the release and calculates separately time of reception take a whole frame as unit
By base station controller the time of reception that draws is reported to host computer PC (304), suppose this moment base station A with Absolute Time Synchronization, then base station B will be according to the time difference of two base station received signals of host computer PC passback
Parameter is adjusted himself synchronised clock, reaching consistent with the clock of base station A, thereby finishes the process (305) that two synchronization among base stations clocks are calibrated.By that analogy, base station A or B just can become the timing base of other base stations acquisition synchronizing signals in the synchronization zone, the behavior search base station A of above-mentioned two base stations or the synchronizing signal of B will be simulated in other base stations, thereby utilize the base station to eat dishes without rice or wine to be consistent with base station A or B to fetching adjustment timer clock separately.Synchronous base-station node will report the clock cycle to host computer PC, thereby whether checking RF has remaining not synchronising base station (306) in the field, if exist then the synchronised clock of this base station carried out electrification reset, if still malfunctioningly will further investigate damage reason (307); If then re-start the calibration of synchronised clock in recovery after restoration clock timing function, finally realize complete synchronously (308) of all base-station nodes of down-hole.After the whole network is synchronous, thereby location-server will arrange periodic signal periodically to carrying out the tracking (309) of synchronizing signal between the base station, the location-server monitor signal has been put after following the tracks of end, enters resting state (310), and so far the synchronizing process end is eated dishes without rice or wine to dock in the base station, down-hole.
In the embodiment shown in fig. 4, location-server (4) is initiated a Location Request to host computer PC (12), the location coordinate information of acquisition request all portable terminals (1) in location-server (4) radiation scope, host computer PC (12) are confirmed backward location-server (4) initiation affirmation positioning instruction.Near location-server (4) begins to search for portable terminal (1), inquire about and obtain the stationkeeping ability information of terminal, portable terminal (1) receive behind the querying command immediately with its under down-hole base-station node (2) connect, by radio-frequency antenna the terminal unique identifier is sent to down-hole base-station node (2), the base station is carried out record with all identification codes that receive by receiving slot, and portable terminal (1) sum in statistics N (N is integer) the individual time slot, the order after statistics is finished during again by receiving slot is made to portable terminal (1) respectively and being replied; Meanwhile location-server will obtain equipment current state information and the service cell information that is sent by base-station node, the relevant parameter that comprises the portable terminal quantity that connects with the base station and be about to measure.After ready, down-hole base-station node (2) triggered location instruction under the request of location-server (4), the time of advent and measuring terminals and its relative position angle with record move terminal (1) signal, host computer PC is according to the time of advent and angle parameter carrying out final personnel in the pit's coordinate Calculation, and positioning result sent to underground moving terminal (1), thereby show its current coordinate position of living in to underground work personnel (7) in real time.The algorithm of existing definite down-hole personnel position coordinate is mainly used the arrival time difference method and is found the solution, and supposes that portable terminal (1) coordinate of living in is (x, y), and the position coordinates of down-hole base-station node (2) is (x
i, y
i), i=1 wherein, 2 ... for each base-station node numbering, because the tunnel degree of depth is known in advance, then need not to consider the coordinate on the z direction of principal axis; Base station A, B, C transmit and reach the portable terminal required time and be respectively τ
A, τ
BAnd τ
C, propagation delay time is δ, then the time difference of base-station node A and B arrival portable terminal is
Wherein c is the light velocity, and δ offsets in subtraction; The time difference that corresponding base-station node A and C arrive portable terminal is
Transmission time τ can be obtained by the base station timer, and base station coordinates is known terms, and then two equations of simultaneous can be obtained the coordinate figure of portable terminal, are underground work personnel (7) coordinate position of living in.At this location algorithm is improved, suppose that it is τ that signal reaches the base-station node required time by portable terminal
1, echo-signal to the portable terminal required time of base-station node reflection is τ
2, then the distance value between portable terminal and the down-hole base-station node can be expressed as D
1A=c (τ
1+ τ
2)/2, D in the formula
1ABe distance value; When the radiofrequency signal of base-station node mobile terminal receive, residing position angle value θ with respect to the base station in the time of can directly obtaining terminal and transmit by smart antenna (207), this angle value is defined as when portable terminal is on the ray take the base station as starting point, the angle value that ray is rotated counterclockwise from direct north; Be that the center of circle, terminal and base station distance are on the circumference of radius thereby portable terminal can be considered as being in take the base station, then can draw the value of portable terminal on the x axle according to the method for solving of a point coordinates on the circumference is x=sin θ * D
1A, the value on the y axle is y=cos θ * D
1AThereby trying to achieve all underground work personnel (7) position coordinates according to the distance of different personnel and base station and relative angle is (sin θ
n* D
NA, cos θ
n* D
NA).This localization method only needs a stylobate tiny node just can determine down-hole personnel position, could determine that with at least three stylobate tiny nodes before improving a personnel positions phase specific efficiency is higher; And host computer PC is obviously more accurately efficient than processing radical sign equation group coordinate computation when processing the trigonometric coordinates computing.Algorithm after the application enhancements can the Effective Raise personnel in the pit precision and the efficient of location, in Practical Project is speedily carried out rescue work, win the quality time for saving personal life.
In the embodiment shown in fig. 5, the microcontroller module of location-server adopts PIC16F676 (501) chip as the controller core circuit, use demodulator CMX7041Q3 (502) chip that the echo-signal of down-hole base-station node (2) is carried out rectification, and check the accuracy of echo-signal by redundancy check module CRC-16 (503).Data processor TMS320C5X (504) chip in usage data processing and the memory module is to carrying out the data analysis computing by the echo-signal parameter of down-hole base-station node (2) reflection, the distance value and the relative angle value that calculate are reached preservation among the external data memory EEPROM (505) on the one hand, can tackle the data that cause because of the burst accident outage and run off; Reach host computer PC (12) through RS485 communication bus interface (509) on the other hand data are carried out comprehensively effectively management.Keyboard input module (506) links to each other with location-server by high speed universal serial bus USB2.0, can be to location-server input change control signal and running parameter, location-server operating state and Information Monitoring can be passed through lattice type LCD (507) display module and show.Be assigned in the different time-gap by control slot counting module MT8980D (508) thereby with the unique identifier of the portable terminal in the server identification range (1) and analyze separately, avoided the interference that runs foul of each other between identification code.Location-server is used the 220V ac power supply, and package casing reliably is connected with PE line multiple spot, with the earth formation electric loop, can effectively protect the inaccurate phenomenon of measurement that causes because of electromagnetism and electrostatic interference.
In the embodiment shown in fig. 6, MAX488E (601) transponder chip that adopts MAXIM company to produce has been realized the serial communication based on RS485 between TMS320C5X (504) and the host computer PC (12).Owing to providing the RS232C serial line interface of standard in the host computer PC, therefore also need use RS232C/RS485 (602) transducer to carry out the interface conversion of PC end.Be specially DSP TMS320C5X (504) chip is linked to each other with RS232C/RS485 (602) transducer by MAX488E (601) chip, and then link to each other with the RS232C serial line interface of ground host computer PC (12), the distance value that DSP TMS320C5X (504) chip is calculated and relative angle value reach in real time host computer PC (12) and process.
Claims (10)
1. underground communica tion and personnel's monitoring device based on a TD-LTE technology, comprise portable terminal, relay station, communication base station, location-server, switch, equipment of the core network, host computer and transmission line, it is characterized in that communication base station comprises down-hole base-station node and ground base station; Equipment of the core network comprises data access server and data authentication server; Host computer comprises host computer PC, central host computer PC and Servers-SQL Server; Transmission line comprises RS485 standard traffic bus and optical fiber; Wherein portable terminal, relay station, down-hole base-station node, location-server and switch are positioned at the down-hole, and ground base station, equipment of the core network and host computer are positioned at aboveground; Link to each other by wireless transmission interface between portable terminal and down-hole base-station node and the location-server three, consist of down-hole Trinity communication monitoring environment, switch converges rear unification by optical fiber with the some base-station nodes in down-hole and links to each other with ground base station, ground base station accesses to Public Switched Telephony Network by equipment of the core network, realizes communicating by letter and transfer of data between underground work personnel and ground staff; Location-server reaches host computer PC with the portable terminal measured and the distance between the base-station node of down-hole and relative angle value by RS485 standard traffic bus, host computer PC gathers uploading data and according to the portable terminal unique identifier every underground work personnel is distinguished, calculate personnel in the pit position coordinate according to distance and angle-data, and be the acquisition time of coordinate information interpolation correspondence, the coordinate information unification is deposited among the Servers-SQL Server, finished the monitoring on time and space to the underground work personnel.
2. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1 is characterized in that wireless transmission interface adopts TD-LTE and the design of LTE-Advanced dual mode interface.
3. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1, the radio-frequency module that it is characterized in that down-hole base-station node and portable terminal all adopts the consensus standard standard that meets 3GPP TS36.1xx series, and radio-frequency antenna adopts many smart antennas to be used for the data-signal transmission.
4. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1 is characterized in that using the hybrid measurement pattern of signal transmitting and receiving time measurement and angular surveying to carry out the personnel in the pit location.
5. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1 is characterized in that all being connected by relay station between underground communica tion base station, switch and the equipment of the core network of device.
6. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1 is characterized in that adopting and eat dishes without rice or wine to dock synchronous mode between the base station down-hole base-station node is carried out system synchronization.
7. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1, it is characterized in that location-server comprises with lower module: micro controller module, redundancy check module, data processing and memory module, radio-frequency module, keyboard input module, display module, time slot counting module, and the 220V AC power that burning voltage is provided; Device housings reliably is connected with PE line multiple spot, consists of electric loop with the earth, has played the effect of anti-electromagnetism and electrostatic interference.
8. according to claim 1,4 or 7 described underground communica tion and personnel's monitoring devices based on the TD-LTE technology, it is characterized in that using MAX488E as the transceiver of RS485 communication bus interface, data processing and memory module to location-server are carried out Interface design, and the distance that this module is calculated reaches in the host computer PC of ground by bus in real time with angle value.
9. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1, it is characterized in that by a central host computer PC all the other host computer PC unified monitoring management, personnel in the pit's coordinate information is all deposited among the Servers-SQL Server, thereby personnel in the pit's distribution situation and travel track carried out comprehensively effectively management.
10. underground communica tion and personnel's monitoring device based on the TD-LTE technology according to claim 1 is characterized in that portable terminal, relay station, down-hole base-station node, location-server and switch are inbeing safe explosion prevention equipment.
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| CN 201220384965 CN202773082U (en) | 2012-08-06 | 2012-08-06 | Device for underground communication and staff monitoring based on time division and long term evolution (TD-LTE) technology |
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| CN 201220384965 CN202773082U (en) | 2012-08-06 | 2012-08-06 | Device for underground communication and staff monitoring based on time division and long term evolution (TD-LTE) technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490831A (en) * | 2013-08-29 | 2014-01-01 | 杭州蛟洋通信科技有限公司 | Intelligent monitoring system for communication lines |
| CN103889014A (en) * | 2014-04-08 | 2014-06-25 | 中国矿业大学(北京) | Multi-mode mine wireless communication gateway and switching method |
| CN103888178A (en) * | 2014-04-09 | 2014-06-25 | 中国矿业大学(北京) | Multi-mode mine mobile communication system |
| CN111722565A (en) * | 2020-06-22 | 2020-09-29 | 山东盛隆安全技术有限公司 | Automatic control technology for accurate personnel positioning base station |
| NL2028770A (en) * | 2020-09-10 | 2022-05-09 | Univ Anhui Sci & Technology | 5g+cmft—r time domain electromagnetic field exploration system and method |
| CN114499584A (en) * | 2022-01-24 | 2022-05-13 | 中国矿业大学(北京) | Mining twisted-pair broadband multiple access multiplexing system |
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2012
- 2012-08-06 CN CN 201220384965 patent/CN202773082U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490831A (en) * | 2013-08-29 | 2014-01-01 | 杭州蛟洋通信科技有限公司 | Intelligent monitoring system for communication lines |
| CN103889014A (en) * | 2014-04-08 | 2014-06-25 | 中国矿业大学(北京) | Multi-mode mine wireless communication gateway and switching method |
| CN103889014B (en) * | 2014-04-08 | 2017-06-09 | 中国矿业大学(北京) | A kind of multi-mode mine wireless communication gateway and changing method |
| CN103888178A (en) * | 2014-04-09 | 2014-06-25 | 中国矿业大学(北京) | Multi-mode mine mobile communication system |
| CN103888178B (en) * | 2014-04-09 | 2017-01-25 | 中国矿业大学(北京) | Multi-mode mine mobile communication system |
| CN111722565A (en) * | 2020-06-22 | 2020-09-29 | 山东盛隆安全技术有限公司 | Automatic control technology for accurate personnel positioning base station |
| NL2028770A (en) * | 2020-09-10 | 2022-05-09 | Univ Anhui Sci & Technology | 5g+cmft—r time domain electromagnetic field exploration system and method |
| CN114499584A (en) * | 2022-01-24 | 2022-05-13 | 中国矿业大学(北京) | Mining twisted-pair broadband multiple access multiplexing system |
| CN114499584B (en) * | 2022-01-24 | 2022-10-14 | 中国矿业大学(北京) | Mining twisted-pair broadband multiple access multiplexing system |
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