CN104200636A - Leaked cable communication system and leaked cable communication method adopting dual redundant power supply channels - Google Patents

Abstract

The invention discloses a leaked cable communication system and a leaked cable communication method adopting dual redundant power supply channels. The leaked cable communication system and the leaked cable communication method are suitable for data transmission and exchange in a coal mine roadway. The leaked cable communication system comprises an initial end direct current feeder, a terminal direct current feeder, a leaked cable and leaked cable nodes arranged on the leaked cable, wherein the leaked cable nodes comprise a radio-frequency signal amplifier, a signal detection module, a central processing unit, a wireless transceiver module and a transceiver antenna; power supply devices are respectively arranged on the initial end direct current feeder and the terminal direct current feeder and are used for providing direct current power supplies and supplying power through storage batteries; when the leaked cable is broken, power supply for the leaked cable nodes can be stilled guaranteed; meanwhile, when the leaked cable is detected to be broken, the leaked cable nodes are connected in a wireless mode, so that data is enabled to pass through the leaked cable at the broken part through wireless transmission; besides, fault information is transmitted to an upper machine connected with the terminal direct current feeder and the number of the leaked cable nodes having faults is prompted, so that the fault positions are easily judged and good convenience for maintenance is provided.

Description

A kind of leakage cable communication system and method for dual power supply channel redundancy

[technical field]

The present invention relates to a kind of cable communication system and method revealed, be particularly useful for carrying out in coal mine down-hole tunnel leakage cable communication system and the method for the dual power supply channel redundancy of data transmission interchange use.

[background technology]

Coal mine roadway is banded non-free space, has destroyed the propagation law of terrestrial wireless electric wave at free space, and terrestrial radio wave communication is propagated and received restriction in underworkings, and communication distance is no more than 300m farthest.Because production environment under coal mine is special, condition is more severe, along with the extensive application of modernization exploitation, transportation technology and equipment, demand to mine modern communications equipment is more and more urgent, a large amount of mobile workings place, production equipment that particularly the mobile production management personnel in down-hole and mine exist in producing, need to link up in time with Production Scheduling System the various change informations in production scene, and make decision-making and the emergency measure of response.The circulation of information and be smooth and easyly related to the aspect work such as colliery High-efficient Production, sacurity dispatching, rescue and relief work, the desirable underground communication mode in present stage colliery is mobile communication mode, the domestic application in underground mobile communication technology is in developing stage.

Reveal cable communication and be and reveal in enclosure space utilization that cable is artificial manufactures a communication media, wireless program request is propagated in cable be also constantly leaked near space cable, radiowave is filled whole tunnel, thereby has ensured continuity and the reliability of signal.Reveal the assembly that cable is similar to transmission line and antenna, radio frequency electromagnetic can be along revealing cable transmission on one side, and space radiation towards periphery on one side, also accepts its radiowave around simultaneously.The underworkings distance of revealing cable covering can reach remote arbitrarily, works long hours stable.Easy for installation, down-hole all devices is cable-fed by revealing, and additional construction cost is lower, and the difficulty of underground construction is little.Revealing communication and adapt to coal mine down-hole tunnel and setting, is the more advanced communication technology adopting in the world in recent years.

Existing leakage cable communication system is power supplying from one direction, after leakage cable disconnects because of reasons such as accident, cable splice place come off, radiofrequency signal can not be continuous transmission, this is very disadvantageous to real-time Communication for Power under coal mine, simultaneously only by revealing cable transmission information, if produce and rupture in the middle of leakage cable, the leakage cable at breakaway poing rear cannot be worked completely, and cannot locate breakaway poing position

[summary of the invention]

Technical purpose: for the weak point in above-mentioned technology, provide a kind of simple in structure, reveal cable generation fracture successor and so can work, and can confirm to produce leakage cable communication system and the method for the dual power supply channel redundancy between breakpoint region.

Technology contents: for realizing above-mentioned technical purpose, the leakage cable communication system of a kind of dual power supply channel redundancy of the present invention, comprise base station, top DC feedback device, terminal DC feedback device and leakage cable, base station by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop, thereby the output terminal of top DC feedback device forms signal covering by revealing the multiple leakage cable of cable series connection node along tunnel wiring, revealing cable is connected with terminal host computer by terminal DC feedback device, described be separately positioned on to reveal on the top DC feedback device at cable two ends and terminal DC feedback device be all connected with power-supply unit, power-supply unit is loaded into DC current to reveal on cable by the current input terminal of top DC feedback device and terminal DC feedback device, described power-supply unit comprises electric power management circuit, on electric power management circuit, be connected with respectively 24V direct supply and intrinsic safety type accumulator.

Described leakage cable node comprises that two by rf signal line and the interconnective node DC feedback of power lead device, on rf signal line between described two node DC feedback devices, be connected with radiofrequency signal two-way amplifier, radio-frequency module has been linked in sequence on radiofrequency signal two-way amplifier, CPU (central processing unit), radio receiving transmitting module and be arranged on the transceiver module electric wire on radio receiving transmitting module, on power lead between described two node DC feedback devices, be connected with node power module, node power module respectively with the two-way amplifier radio-frequency module that has been linked in sequence, CPU (central processing unit), radio receiving transmitting module is all connected to node power module and is connected and power supply is provided, described top DC feedback device and terminal DC feedback device model are TJ-KD-C type loop, described node DC feedback device is TJ-KD-Z type loop, and radiofrequency signal two-way amplifier model is DT1328-KTL91, and radio-frequency module is modulator-demodular unit, and central processing unit number is STM32F chip.

A leakage cable communication method that uses the dual power supply channel redundancy of said system, its step is as follows:

A. base station by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop, the output terminal of top DC feedback device is by revealing connect along tunnel multiple leakage cable nodes being connected on terminal DC feedback device of cable, thereby signal is covered and reveals cable tunnel on the way, be separately positioned on power-supply unit on top DC feedback device and terminal DC feedback device simultaneously to revealing cable power supply simultaneously, in the time that leakage cable node cannot obtain power supply from the power-supply unit of one end, can obtain normal power supply of working by other end power-supply unit;

B. when system works, the CPU (central processing unit) of revealing in the leakage cable node that is numbered n on cable just launches to the next one leakage cable node being linked in sequence the heartbeat signal that comprises its numbering by revealing cable according to preset value every a time cycle, will send feedback signal when being numbered after the leakage cable node of n+1 receives heartbeat signal, send and comprise the heartbeat signal of self numbering to the leakage cable node that is numbered n+2 simultaneously; Send when revealing by radio-frequency module control radiofrequency signal two-way amplifier after the feedback signal of leakage cable node transmitting that is numbered the CPU (central processing unit) of electric leakage cable node of n and receives by radio-frequency module numbering n+1 after data message on cable amplifies;

C. ought be numbered the heartbeat signal that the CPU (central processing unit) in the leakage cable node of n sends by revealing cable, in the default time interval, do not receive numbering n+1 leakage cable node feed back feedback signal time, leakage cable breakage between the leakage cable node of judgement numbering n and the leakage cable node of numbering n+1, now, reveal cable node and number n+1 leakage cable node as border to reveal the numbering n of both sides, cable breakage place respectively, numbering n reveals cable node and upstream reveals cable node transmission open wireless transceiver module information according to presetting selectivity, thereby make to number n and reveal several leakage cable nodes activation radio receiving transmitting modules that cable node upstream connects, these leakage cable nodes that activate radio receiving transmitting module are revealed cable node composition node set S together with numbering n, numbering n+1 reveals cable node and reveals downstream cable node transmission open wireless transceiver module information according to presetting selectivity, thereby make to number n+1 and reveal several leakage cable nodes activation radio receiving transmitting modules that cable node downstream connects, these leakage cable nodes that activate radio receiving transmitting modules are revealed cable node together with numbering n+1 and are formed node set R, the leakage cable node wireless networking of the leakage cable node in described node set S and node set R in can only gathering with another,

D. in the time presetting the leakage cable node node set S element number of open wireless transceiver module and be 1, number the leakage cable node of n as wireless networking data retransmission point, in the time presetting the leakage cable node node set R element number of open wireless transceiver module and be 1, n+1 reveals cable node as wireless group data retransmission point, when S set element number is greater than 1 and set R element number while being 1, the leakage cable node that activates radio receiving transmitting module turns to target with wireless data transmission rate maximum, build random wireless topology, thereby set up the wireless channel of the leakage cable node of revealing both sides, cable breakage place, detailed process is as follows:

If i is the node of revealing in cable node node set R, j is the node of revealing in cable node node set S, κ _i,jfor the inverse of distance between node i and node j, as being similar to of the communication reliability between i and j node; T _i,jfor node i sends to wireless data the probability of node j; Utilize the definition of formula I to weigh each node communication capacity index ρ _ifor the input packet and the difference of exporting packet of each node, that is:

${\mathrm{\ρ}}_i=\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}({\mathrm{\κ}}_{i,j}{T}_{i,j}-{\mathrm{\κ}}_{j,i}{T}_{j,i}),i\∈R,j\∈S---I$

Thereby between the node in set R and the node in S set, set up the radio communication channel combination that the total communication capacity of network is the strongest;

E. reveal the leakage cable node of both sides, cable breakage place by the wireless channel transmission data of setting up, concrete steps are, the leakage cable node of wireless channel is set up in breaking part upstream, its inner central processing unit controls radiofrequency signal two-way amplifier is crossed radio-frequency module by the information exchange receiving and is converted to and is with numbered packet, the leakage cable node that uses radio receiving transmitting module and alignment breaking part downstream, transceiver module sky to set up wireless channel packet sends, downstream electric leakage cable node is by the numbered packet of transceiver module antenna reception band on its inner transceiver module, leak electricity the radio-frequency module of cable node by packet conversion and by radiofrequency signal two-way amplifier, data message is sent out to the leakage cable that prolongs output terminal after large by downstream afterwards and send.

In the time setting up the numbering disappearance with numbered packet that plays in radio communication channel that the downstream electric leakage cable node of reception effect receives, again send the request of disappearance numbering packet to the electric leakage cable node of upstream of setting up radio communication channel by radio receiving transmitting module, the electric leakage cable node of setting up the upstream of radio communication channel is received the packet that again sends request numbering after request; When the electric leakage cable node of revealing downstream, cable breakage place numbering by wireless receiving to packet all add warning marker and reveal cable the numbering that produces breaking part both sides and reveal cable node, after the data of the numbering with warning marker and leakage cable node send in host computer by terminal DC feedback device, host computer sends failure warning, and points out abort situation between numbering n electric leakage cable node and n+1 electric leakage cable node; In the time that 24V direct supply opens circuit, power management circuits is switched intrinsic safety type storage battery power supply.

Beneficial effect: the present invention is equipped with power-supply unit on top DC feedback device and terminal DC feedback device, and provide direct supply and storage battery power supply, in the time of the power-supply unit fault of one end, the power-supply unit of the other end still can maintain the normal work of whole system, simultaneously, in the time revealing cable breakage, still can ensure the power supply to revealing cable node, reveal cable node simultaneously and can start wireless connections in the time leakage cable breakage being detected, data on leakage cable are passed through to the leakage cable of breaking part by wireless transmission, send failure message to the host computer being connected with terminal DC feedback device simultaneously, and point out out the leaky cable breaking down node serial number, thereby be easy to judge the position that leaky cable breaks down, improve maintenance efficiency.

[brief description of the drawings]

Fig. 1 is system chart of the present invention.

Fig. 2 is novel leakage cable node block diagram of the present invention.

Fig. 3 is method flow block diagram of the present invention.

In figure: 1-base station, 2-top DC feedback device, 3-terminal DC feedback device, 4-reveals cable, and 5-reveals cable node, 6-electric power management circuit, 7-24V direct supply, 8-accumulator, 9-DC feedback device, 10-radiofrequency signal two-way amplifier, 11-radio-frequency module, 12-CPU (central processing unit), 13-radio receiving transmitting module, 14-transceiver module antenna, 15-node power module.

[specific embodiments]

Below in conjunction with accompanying drawing, the present invention is described in further detail.

As shown in Figure 1, the leakage cable communication system of dual power supply channel redundancy of the present invention, comprise base station 1, top DC feedback device 2, terminal DC feedback device 3 and leakage cable 4, described top DC feedback device 2 and terminal DC feedback device 3 are TJ-KD-C type loop, base station 1 by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop 2, thereby the output terminal of top DC feedback device 2 is connected multiple leakage cable nodes 5 along the covering of tunnel wiring formation signal by revealing cable 4, revealing cable 4 is connected with terminal host computer by terminal DC feedback device 3, described be separately positioned on to reveal on the top DC feedback device 2 at cable 4 two ends and terminal DC feedback device 3 be all connected with power-supply unit, power-supply unit is loaded into DC current to reveal on cable 4 by the current input terminal of top DC feedback device 2 and terminal DC feedback device 3, described power-supply unit comprises electric power management circuit 6, on electric power management circuit 6, be connected with respectively 24V direct supply 7 and intrinsic safety type accumulator 8, in the time that 24V direct supply 7 opens circuit, power management circuits 6 is switched intrinsic safety type accumulator 8 and is powered, on top DC feedback device and terminal DC feedback device, be equipped with power-supply unit, make to reveal the power lead looping net in cable, make to reveal cable after middle any point place disconnects, the leaky cable node on leaky cable still can obtain power supply normal work.

As shown in Figure 2, described leakage cable node 5 comprises that two by rf signal line and the interconnective node DC feedback of power lead device 9, on rf signal line between described two node DC feedback devices 9, be connected with radiofrequency signal two-way amplifier 10, radio-frequency module 11 has been linked in sequence on radiofrequency signal two-way amplifier 10, CPU (central processing unit) 12, radio receiving transmitting module 13 and be arranged on the transceiver module electric wire 14 on radio receiving transmitting module 13, on power lead between described two node DC feedback devices 8, be connected with node power module 15, node power module 15 respectively with radiofrequency signal two-way amplifier 10, radio-frequency module 11, CPU (central processing unit) 12, radio receiving transmitting module 13 is connected and power supply is provided.Described node DC feedback device 9 is TJ-KD-Z type loop, and radiofrequency signal two-way amplifier 10 models are DT1328-KTL91, and radio-frequency module 11 is modulator-demodular unit, and CPU (central processing unit) 12 models are STM32F chip.

As shown in Figure 3, a kind of leakage cable communication method of dual power supply channel redundancy, its step is as follows:

A. base station 1 by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop 2, the output terminal of top DC feedback device 2 is by revealing connect along tunnel multiple leakage cable nodes 5 being connected on terminal DC feedback device 3 of cable 4, thereby signal is covered and reveals cable 4 tunnel on the way, the power-supply unit being simultaneously separately positioned on top DC feedback device 2 and terminal DC feedback device 3 is powered to revealing cable 4 simultaneously, in the time that leakage cable node 5 cannot obtain power supply from the power-supply unit of one end, can obtain by the other end power-supply unit power supply of normal work,

B. when system works, the CPU (central processing unit) 12 of revealing in the leakage cable node 5 that is numbered n on cable 4 just launches to the next one leakage cable node 5 being linked in sequence the heartbeat signal that comprises its numbering by revealing cable 4 according to preset value every a time cycle, will send feedback signal when being numbered after the leakage cable node 5 of n+1 receives heartbeat signal, send and comprise the affiliated heartbeat signal that cable node 5 is numbered of revealing to the leakage cable node 5 that is numbered again n+2 simultaneously, after the feedback signal that the leakage cable node 5 of numbering n+1 launches, control radiofrequency signal two-way amplifier 10 by radio-frequency module 11 and will reveal after data message on cable 4 amplifies and send when being numbered the CPU (central processing unit) 12 of electric leakage cable node 5 of n and receiving by radio-frequency module,

C. ought be numbered the heartbeat signal that the CPU (central processing unit) 12 in the leakage cable node 5 of n sends by revealing cable 4, in the default time interval, do not receive numbering n+1 leakage cable node 5 feed back feedback signal time, leakage cable 4 between the leakage cable node 5 of judgement numbering n and the leakage cable node 5 of numbering n+1 ruptures, now, reveal cable node 5 and number n+1 leakage cable node 5 as border to reveal the numbering n of cable 4 breaking part both sides respectively, numbering n reveals cable node 5 and upstream reveals cable node 5 and send open wireless transceiver module 13 information according to presetting selectivity, thereby make several leakage cable nodes 5 of numbering the 5 upstreams connections of n leakage cable node activate radio receiving transmitting module 13, these leakage cable nodes 5 that activate radio receiving transmitting module 13 are revealed cable node 5 together with numbering n and are formed node set S, numbering n+1 reveals cable node 5 and reveals downstream cable node 5 and send open wireless transceiver module 13 information according to presetting selectivity, thereby make several leakage cable nodes 5 of numbering the 5 downstreams connections of n+1 leakage cable node activate radio receiving transmitting module 13, these leakage cable nodes 5 that activate radio receiving transmitting modules 13 are revealed cable node 5 together with numbering n+1 and are formed node set R, leakage cable node 5 wireless networkings of the leakage cable node 5 in described node set S and node set R in can only gathering with another,

D. the leakage cable node 5 of described activation radio receiving transmitting module 13 can be 1, in the time presetting the leakage cable node 5 node set S element numbers of open wireless transceiver module 13 and be 1, number the leakage cable node 5 of n as wireless networking data retransmission point, in the time presetting the leakage cable node 5 node set R element numbers of open wireless transceiver module 13 and be 1, n+1 reveals cable node 5 as wireless group data retransmission point; In the time activating node set S that the leakage cable node 5 of radio receiving transmitting module 13 forms and node set R and be respectively 1,2,3 or 4 etc., be S set element number be greater than 1 and set R element number be greater than at 1 o'clock, the leakage cable node 5 that activates radio receiving transmitting module 13 turns to target with wireless data transmission rate maximum, build random wireless topology, thereby set up leakage cable node 5 wireless channels of revealing cable 4 breaking part both sides, detailed process is as follows:

If i reveals the node that cable node 5 is gathered in R, j is the node of revealing in cable node 5 S set, κ _i,jfor the inverse of distance between node i and node j, as being similar to of the communication reliability between i and j node; T _i,jfor node i sends to wireless data the probability of node j; Utilize the definition of formula I to weigh each node communication capacity index ρ _ifor the input packet and the difference of exporting packet of each node, that is:

${\mathrm{\ρ}}_i=\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}({\mathrm{\κ}}_{i,j}{T}_{i,j}-{\mathrm{\κ}}_{j,i}{T}_{j,i}),i\∈R,j\∈S---I$

Make to gather the total communication capacity of network that the node in node and the S set in R forms the strongest; Be node in S set with set R in node under only knowing separately, in set neighbor node in the situation that, according to the Duality Decomposition theory of protruding optimization, utilize method of Lagrange multipliers, solve following optimized objective function by formula II:

$\begin{array}{cc}& \arg \max \underset{i=1}{\overset{\left|R\right|+\left|S\right|}{\mathrm{\Σ}}}{\mathrm{\ρ}}_i\\ s.t.& {\mathrm{\ρ}}_i=\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}({\mathrm{\κ}}_{i,j}{T}_{i,j}-{\mathrm{\κ}}_{j,i}{T}_{j,i}),i\∈R,j\∈S\end{array}---\mathrm{II}$

S set is as follows with the each node computation process in set R:

Taking node i as example

First, calculate optimized objective function by formula III

$\min -{\mathrm{\ρ}}_i\left(n\right)+\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}({\mathrm{\κ}}_{i,j}\·T_{i,j}\left(n\right)\·p_{j,i}^{\′}(n-1))-\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}({\mathrm{\κ}}_{j,i}\·U_{j,i}\left(n\right)\·p_{i,j}(n-1))+{\mathrm{\ρ}}_i\left(n\right)\underset{j=1}{\overset{\left|S\right|}{\mathrm{\Σ}}}(q_{j,i}^{\′}(n-1)-q_{i,j}(n-1))---\mathrm{III}$

In formula, n is iterations, is directly proportional, until function convergence to the node number in S set and set R; p _i,j(n-1), q _i,j(n-1) being the end value of last iteration, in the time of n=1, is predefined initial value; P' _j,i(n-1), q' _j,i(n-1) value transmitting for neighbor node; ρ _i(n), T _i,j(n), U _j,i(n) be required function variable.

By solving of formula III, in conjunction with the data of neighbor node transmission, use iterative IV and iterative V to upgrade p _i,jand q _i,j, iterative IV and iterative V are as follows:

p _i,j(n)＝p _i,j(n-1)+c(T _j,i(n-1)-U _j,i(n-1)) Ⅳ

q _i,j(n)＝q _i,j(n-1)+c(w _j(n-1)-w _i(n-1)) Ⅴ

After node i is calculated, by the ρ after calculating _i(n), p _i,j(n-1), q _i,j(n-1) be transferred to neighbor node, repeat above-mentioned calculating as the parameter substitution formula III of neighbor node, wherein, ρ _i(n), while being transferred to neighbor node j, be just w in formula _j(n-1) component; p _i,jwhile being transferred to neighbor node j, be p' in formula _j,ithereby, select optimum node combination;

E. reveal the leakage cable node 5 of cable 4 breaking part both sides by the wireless channel transmission data of setting up, concrete steps are, the leakage cable node 5 of wireless channel is set up in breaking part upstream, its inner CPU (central processing unit) 12 is controlled radiofrequency signal two-way amplifier 10 and the information exchange receiving is crossed to radio-frequency module 11 is converted to and is with numbered packet, the leakage cable node 5 that uses radio receiving transmitting module 13 and transceiver module antenna 14 to set up wireless channel to breaking part downstream packet sends, downstream electric leakage cable node 5 is by the numbered packet of transceiver module antenna 14 receiving belt on its inner transceiver module 13, leak electricity the radio-frequency module 11 of cable node 5 by packet conversion and by radiofrequency signal two-way amplifier 10, data message is sent out to the leakage cable 4 that prolongs output terminal after large by downstream afterwards and send.

In the time setting up the numbering disappearance with numbered packet that plays in radio communication channel that the downstream electric leakage cable node 5 of reception effect receives, again send the request of disappearance numbering packet to the electric leakage cable node 5 of upstream of setting up radio communication channel by radio receiving transmitting module 13, the electric leakage cable node 5 of setting up the upstream of radio communication channel is received the packet that again sends request numbering after request.

When the electric leakage cable node 5 of revealing cable 4 breaking part downstreams numberings by wireless receiving to packet all add warning marker and reveal cable 4 numbering that produces breaking part both sides and reveal cable node 5, after the data of the numbering with warning marker and leakage cable node 5 send in host computer by terminal DC feedback device 3, host computer sends failure warning, and points out abort situation between numbering n electric leakage cable node 5 and n+1 electric leakage cable node 5.

In the time that 24V direct supply 7 opens circuit, power management circuits 6 is switched intrinsic safety type accumulator 8 and is powered.

Claims (8)

1. the leakage cable communication system of a dual power supply channel redundancy, comprise base station (1), top DC feedback device (2), terminal DC feedback device (3) and leakage cable (4), it is characterized in that: base station (1) by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop (2), the output terminal of top DC feedback device (2) by reveal cable (4) connect multiple leakage cable nodes (5) thus forming signal along tunnel wiring covers, revealing cable (4) is connected with terminal host computer by terminal DC feedback device (3), described be separately positioned on to reveal on the top DC feedback device (2) at cable (4) two ends and terminal DC feedback device (3) be all connected with power-supply unit, power-supply unit is loaded into DC current to reveal on cable (4) by the current input terminal of top DC feedback device (2) and terminal DC feedback device (3), described power-supply unit comprises electric power management circuit (6), on electric power management circuit (6), be connected with respectively 24V direct supply (7) and intrinsic safety type accumulator (8).

2. the leakage cable communication system of dual power supply channel redundancy according to claim 1, it is characterized in that: described leakage cable node (5) comprises that two by rf signal line and the interconnective node DC feedback of power lead device (9), on rf signal line between described two node DC feedback devices (9), be connected with radiofrequency signal two-way amplifier (10), radio-frequency module (11) has been linked in sequence on radiofrequency signal two-way amplifier (10), CPU (central processing unit) (12), radio receiving transmitting module (13) and be arranged on the transceiver module electric wire (14) on radio receiving transmitting module (13), on power lead between described two node DC feedback devices (8), be connected with node power module (15), node power module (15) respectively with radiofrequency signal two-way amplifier (10), radio-frequency module (11), CPU (central processing unit) (12), radio receiving transmitting module (13) is connected and power supply is provided.

3. the leakage cable communication system of dual power supply channel redundancy according to claim 1, is characterized in that: described top DC feedback device (2) and terminal DC feedback device (3) model are TJ-KD-C type loop.

4. the leakage cable communication system of dual power supply channel redundancy according to claim 2, it is characterized in that: described node DC feedback device (9) is TJ-KD-Z type loop, radiofrequency signal two-way amplifier (10) model is DT1328-KTL91, radio-frequency module (11) is modulator-demodular unit, and CPU (central processing unit) (12) model is STM32F chip.

5. right to use requires a leakage cable communication method for the dual power supply channel redundancy of system described in 2, it is characterized in that step is as follows:

A. base station (1) by radio-frequency cable by the rf inputs of radiofrequency signal input direct-current loop (2), the output terminal of top DC feedback device (2) is by revealing connect along tunnel multiple leakage cable nodes (5) being connected on terminal DC feedback device (3) of cable (4), thereby signal is covered and reveals cable (4) tunnel on the way, the power-supply unit being simultaneously separately positioned on top DC feedback device (2) and terminal DC feedback device (3) is powered to revealing cable (4) simultaneously, in the time that leakage cable node (5) cannot obtain power supply from the power-supply unit of one end, can obtain by the other end power-supply unit power supply of normal work,

B. when system works, the CPU (central processing unit) (12) of revealing in the leakage cable node (5) that is numbered n on cable (4) just launches to the next one leakage cable node (5) being linked in sequence the heartbeat signal that comprises its numbering by revealing cable (4) according to preset value every a time cycle, will send feedback signal when being numbered after the leakage cable node (5) of n+1 receives heartbeat signal, send and comprise the heartbeat signal of self numbering to the leakage cable node (5) that is numbered n+2 simultaneously; When controlling by radio-frequency module (11) after radiofrequency signal two-way amplifier (10) will be revealed the data message amplification on cable (4) and send after the feedback signal of leakage cable node (5) transmitting that is numbered the CPU (central processing unit) (12) of electric leakage cable node (5) of n and receives by radio-frequency module numbering n+1;

C. ought be numbered the heartbeat signal that the CPU (central processing unit) (12) in the leakage cable node (5) of n sends by revealing cable (4), in the default time interval, do not receive numbering n+1 leakage cable node (5) feed back feedback signal time, leakage cable (4) fracture between the leakage cable node (5) of judgement numbering n and the leakage cable node (5) of numbering n+1, now, reveal cable node (5) and number n+1 leakage cable node (5) as border to reveal the numbering n of cable (4) breaking part both sides respectively, numbering n reveals cable node (5) and upstream reveals cable node (5) transmission open wireless transceiver module (13) information according to presetting selectivity, thereby make to number n and reveal several leakage cable nodes (5) activation radio receiving transmitting modules (13) that cable node (5) upstream connects, these leakage cable nodes (5) that activate radio receiving transmitting module (13) are revealed cable node (5) composition node set S together with numbering n, numbering n+1 reveals cable node (5) and reveals downstream cable node (5) transmission open wireless transceiver module (13) information according to presetting selectivity, thereby make to number n+1 and reveal several leakage cable nodes (5) activation radio receiving transmitting modules (13) that cable node (5) downstream connects, these leakage cable nodes (5) that activate radio receiving transmitting module (13) are revealed cable node (5) together with numbering n+1 and are formed node set R, leakage cable node (5) in described node set S and node set R can only with another set in leakage cable node (5) wireless networking,

D. in the time presetting leakage cable node (5) the node set S element number of open wireless transceiver module (13) and be 1, number the leakage cable node (5) of n as wireless networking data retransmission point, in the time presetting leakage cable node (5) the node set R element number of open wireless transceiver module (13) and be 1, n+1 reveals cable node (5) as wireless group data retransmission point, when S set element number is greater than 1 and set R element number while being 1, the leakage cable node (5) that activates radio receiving transmitting module (13) turns to target with wireless data transmission rate maximum, build random wireless topology, thereby set up the wireless channel of the leakage cable node (5) of revealing cable (4) breaking part both sides, detailed process is as follows:

If i is for revealing the node in cable node (5) node set R, j is for revealing the node in cable node (5) node set S, κ _i,jfor the inverse of distance between node i and node j, as being similar to of the communication reliability between i and j node; T _i,jfor node i sends to wireless data the probability of node j; Utilize the definition of formula I to weigh each node communication capacity index ρ _ifor the input packet and the difference of exporting packet of each node, that is:

${\mathrm{\ρ}}_i=\stackrel{\left|S\right|}{\mathrm{\Σ}}({\mathrm{\κ}}_{i,j}{T}_{i,j}-{\mathrm{\κ}}_{j,i}{T}_{j,i}),i\∈R,j\∈S---I$

Thereby between the node in set R and the node in S set, set up the radio communication channel combination that the total communication capacity of network is the strongest;

E. reveal the leakage cable node (5) of cable (4) breaking part both sides by the wireless channel transmission data of setting up, concrete steps are, the leakage cable node (5) of wireless channel is set up in breaking part upstream, its inner CPU (central processing unit) (12) is controlled radiofrequency signal two-way amplifier (10) and the information exchange receiving is crossed to radio-frequency module (11) is converted to and is with numbered packet, the leakage cable node (5) that uses radio receiving transmitting module (13) and transceiver module antenna (14) to set up wireless channel to breaking part downstream packet sends, downstream electric leakage cable node (5) is by the numbered packet of transceiver module antenna (14) receiving belt on its inner transceiver module (13), packet is changed and passed through radiofrequency signal two-way amplifier (10) and data message is sent out to the leakage cable (4) that prolongs output terminal after large send by the leak electricity radio-frequency module (11) of cable node (5) of downstream afterwards.

6. the leakage cable communication method of dual power supply channel redundancy according to claim 5, it is characterized in that: in the time setting up the numbering disappearance with numbered packet that plays in radio communication channel that the downstream electric leakage cable node (5) of reception effect receives, again send the request of disappearance numbering packet to the electric leakage cable node (5) of upstream of setting up radio communication channel by radio receiving transmitting module (13), the electric leakage cable node (5) of setting up the upstream of radio communication channel is received the packet that again sends request numbering after request.

7. the leakage cable communication method of dual power supply channel redundancy according to claim 5, it is characterized in that: when the electric leakage cable node (5) of revealing cable (4) breaking part downstream numbering by wireless receiving to packet all add warning marker and reveal cable (4) numbering that produces breaking part both sides and reveal cable nodes (5), after the data of the numbering with warning marker and leakage cable node (5) send in host computer by terminal DC feedback device (3), host computer sends failure warning, and point out abort situation between numbering n electric leakage cable node (5) and n+1 electric leakage cable node (5).

8. the leakage cable communication method of dual power supply channel redundancy according to claim 5, is characterized in that: in the time that 24V direct supply (7) opens circuit, power management circuits (6) is switched intrinsic safety type accumulator (8) power supply.