CN2718692Y - Circum ferential invasion guard system for radio electromagnetic field leakage theory - Google Patents
Circum ferential invasion guard system for radio electromagnetic field leakage theory Download PDFInfo
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- CN2718692Y CN2718692Y CN 03209915 CN03209915U CN2718692Y CN 2718692 Y CN2718692 Y CN 2718692Y CN 03209915 CN03209915 CN 03209915 CN 03209915 U CN03209915 U CN 03209915U CN 2718692 Y CN2718692 Y CN 2718692Y
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Abstract
The utility model provides a circumferential invasion guard system for the radio electromagnetic field leakage theory, characterized in that two leakage coaxial cables are inlaid along the whole circumferential range requiring invasion guard in parallel. The total number of the sections of the whole length of the cable is even number. The message receiving leakage field and the message sending leakage field adopts the forward coupled mode to work and the differential mode to connect with a balance detector of environmental parameter. An extension set of section alarm transmits alarm signals and a system alarm controller confirms an alarm section. The system comprises two leakage coaxial cables, a message receiving module, a message sending module, the balance detector of environmental parameters, an isolated filter of low pass, a matched load of high frequency, the extension set of section alarm, the system alarm controller and a system power supply.
Description
Affiliated technical field
The utility model relates to the safety precaution field, and especially employing wireless electricity electromagnetic field leaks a kind of circumference Intrusion Prevention System of principle.
Background technology
Utilize two leaky coaxial cables as intrusion sensor, be parallel to each other and keep certain distance, along the circumference shallow embedding of required protection under the face of land,, a cable termination radio transmitter, another cable termination radio receiver are promptly formed the circumference Intrusion Prevention System that principle is leaked in the most basic radio electromagnetsm field.When system sets up defences, set up the leakage field of continuous and uniform radio electromagnetsm ripple around the cable of posting a letter, by the coupling of the radio energy between two leaky cable sensors, radio receiver receives signal relatively uniformly.In case the above-mentioned circumference of setting up defences of external personnel's illegal invasion takes place, radio receiver can detect because the instantaneous change that personnel invade caused radio leakage field drives warning device and realizes safety precaution.
Article two, the coupling scheme between the leaky coaxial cable sensor have two kinds of fundamental types: sender and receiver are put the be referred to as counter coupled mode of a side together: sender and receiver split the be referred to as forward coupling scheme of both sides.Research data shows: the problem that counter coupled wants emphasis to overcome is respectively to invade the energy that is coupled on the position because leaky cable itself exists transmission attenuation thereby has nothing in common with each other along passage length, and this will cause the great difficulty that the detection sensitivity dynamic range is provided with at receiving end.The problem that forward coupling wants emphasis to overcome has two: the normality signal that at first is this coupling scheme mainly is the variation sensitivity of conductivity as the soil water-containing state to the variation of burying environmental factor underground of leaky cable sensor; Next is to reduce the i.e. reduction of relative detection sensitivity at the ratio that receiving end causes transient state invasion signal and normality not to have the invasion signal along the integration of whole energy of the identical coupled component of passage length each point phase place.To sum up, the forward coupling scheme are lower to the responsive and relative detection sensitivity of environmental change, thereby cause false alarm easily.
The problem that exists at the counter coupled mode, prior art has developed the special leaky coaxial cable of a kind of structure for the circumference Intrusion Prevention System specially, its outer conductor is processed as control bore size and distance between borehole etc. by designing requirement is special, in the hope of reach make its leakage energy along cable length step by step gradual change can be referred to as " energy cascade leaky cable " with the purpose of its transmission attenuation of balance.Henceforth, the major applications system all adopts counter coupled mode and employing " energy cascade leaky cable ".
The main reference document can be looked into the paper " the intrusion detection development of leaky cable technology " (" Advancements in Leaky Cable Technologyfor Intrusion Detection, " R.K.Harman.) of seeing International Power electronics engineers (IEEE) nineteen eighty-two Ka Nahan world security precautionary technology annual meeting (International Carnahan Conference on Security Technology) and delivering.
The prior art that the utility model relates to mainly contains following United States Patent (USP):
US 4091367 main application 400ns RF pulse works and speed-sensitive switch alternately change the transmission direction of transceiver, adopt " energy cascade leaky cable " and counter coupled mode.
US 4562428 mainly to use continuous carrier and segmentation Detection Techniques, adopts " energy cascade leaky cable " and counter coupled mode.
US 6577236 mainly uses continuous carrier and frequency sweep modulation techniques, has proposed a kind of two coaxial leaky cable of monomer structure, has reduced the construction cost of cable burial relatively.
Prior art has affirmed that the radio electromagnetsm field leaks the validity that principle is formed various circumference Intrusion Prevention System, but owing to lay particular emphasis on coaxial leaky cable and the counter coupled mode that adopts special requirement, thought a kind of " expensive system " by the public for a long time, be only applicable to the occasion that military project, ammunition depot, prison, airport etc. must remain vigilant against.
Summary of the invention
Lower when adopting the forward coupling scheme to environmental change sensitivity and relative sensitivity for the circumference Intrusion Prevention System that overcomes employing wireless electricity electromagnetic field leakage principle, thereby cause the deficiency of false alarm easily, the utility model provides a kind of circumference Intrusion Prevention System that adopts the forward coupling scheme, both need not use the coaxial leaky cable of special requirement, again the susceptibility of environmental change is recompensed, and limited the undue reduction of relative detection sensitivity.
The technical scheme that the utility model adopted is:
The circumference Intrusion Prevention System is made up of two common leaky coaxial cables, several transceiver modules, environmental parameter balanced detector, low pass separation filter, high frequency matched load, paragraph warning extension set and system alarm controller and a cover system power supply basically.
Article two, leaky coaxial cable is called post a letter cable and collection of letters cable as intrusion sensor, is parallel to each other and keeps certain distance, gives under the face of land along the circumference shallow embedding of required protection.
The leaky coaxial cable that is adopted in the utility model need not that outer conductor is carried out specialties such as perforate or fluting and processes, also need not particular design to pursue its leakage energy along cable length " energy cascade is sewed " effect of gradual change step by step, only adopt common concentric cable, braid angle to its outer conductor is adjusted, and the photoelectricity cover ratio that changes its outer conductor promptly dredged to compile to the outer conductor of its multiply braiding and handles and answer and can satisfy request for utilization with duplex sheath, and its cost is than the leaky coaxial cable of special-purpose special requirement about order of magnitude that descends.
Article two, cable is foundation along its total length by reasonably relative detection sensitivity, is divided into isometric some paragraphs, and adjacent two transceiver paragraphs are isometric on the requirement maintenance collection of letters cable at least.Paragraph is divided should obey the principle that it adds up to even number.Divide paragraph and promptly limit cable length, for system brings substantial double advantage: reduced the transmission attenuation of cable own on the one hand detecting the influence of target; Improved the ratio of intrusion target signal and background signal on the other hand relatively.
Article two, divide the cable of some isometric paragraphs, wherein one is called the cable of posting a letter, and the every section cable of posting a letter inserts a calling module; Another is called collection of letters cable, and every section collection of letters cable inserts a collection of letters module.Two calling modules two ends that are placed on per two adjacent paragraphs on the same cable, two collection of letters modules are arranged at a place in pairs, transmission direction on two adjacent paragraph collection of letters cables has the form feature that goes in the same direction, have only be connected on the cable two ends of posting a letter calling module for being provided with separately.
Article two, the same of cable laid in the paragraph, and the collection of letters module that post a letter calling module that cable connect and collection of letters cable the are connect same both sides of laying paragraph that are placed in have the architectural feature of forward coupling.
Article two, connect between the segmentation of cable with the low pass separation filter, realize the isolation on the VHF high-frequency work frequency range, but allow feedthrough direct supply and medium and low frequency control signal.
Calling module and collection of letters module adopt the radio signal of continuous carrier, transmit-receive cofrequency, work in the VHF very high frequency band, and adjacent paragraph adopts different channels to prevent the radio co-channel interference.
Each collection of letters module is finished continuous detecting and two results of corresponding output of amplitude and phase place to the radio VHF signal that transmits in this paragraph channel.Two collection of letters modules that are provided with in pairs on the adjacent paragraph divide differential to go into the environmental parameter balanced detector about four output results of amplitude and phase place, each other with reference to and in addition common mode relatively obtain the neutral equilibrium effect and cause that as raining soil conductivity changes to the influence of coupling attenuation to overcome environmental change.
Adjacent two sections collection of letters modules drive paragraph warning extension set by the result that the environmental parameter evener divides differential to go into the common mode comparison, alert output as a certain paragraph in this adjacent paragraph, in order to confirming that the fact of external personnel's illegal invasion takes place this paragraph, and the terminal system alarm controller to each paragraph warning extension set initiatively press during implementation cycle visiting tour the paragraph address by paragraph warning extension set with intermediate-freuqncy signal mode passive circular coding alert on collection of letters cable passage.
The system alarm controller is connected the channel end of collection of letters cable.The system alarm controller is by the active routine inspection mode, regularly each environmental parameter evener on the passage is carried out common mode with some cycles and relatively export the output state of invasion alert on each paragraph that is reflected and realize visiting tour, the alert paragraph of confirming is reported to the police and provided warning paragraph address code with sound, light type of alarm show by finishing the working method of replying and verify effect of shaking hands in turn.The intermediate frequency working method of transmitting alert on collection of letters cable passage is two-way joining common-frequency simplex, be consistent 455KHz of being of transmitting-receiving frequency or 200KHz, between system alarm controller and each paragraph warning extension set at one time section go up or receive or send out, the duplex mode that does not adopt transmitting-receiving simultaneously is to simplify the design content of medium-frequency receiving and sending letter circuit.
The operator on duty of alarm controller end finishes system by the operation of passage feed power supply with manual type after confirming alert and resets or remove.
The actual capacity of each section of system depends primarily on capacity, visiting tour cycle and the polling rate of codec in the alarm controller, is not subjected to strict restriction in theory.
Power system capacity is excessive promptly must insert the too much paragraph warning extension set of quantity the time, can in reporting to the police extension set, set up in paragraph the DTMF transmitter of being invaded alert control, in the system alarm controller, set up dtmf receiver, realize the active warning of paragraph warning extension set, in order to avoid the alert that personnel invade when occurring in polling period gap section is just failed to report.
The low pass separation filter of system has branch's distressed structure, the collection of letters of system and post a letter two leaky coaxial cables by the binding that inserts low pass separation filter branch expansion end allow with and the mode of connection that connects by the circumference intrusion defense of a plurality of branches of shape multiple connection to realize that branch's formula distressed structure is arranged net of the required protection circumference of reality.
System adopts DC power supply, establishes to exchange power failure reserve battery automatic switching function, and the power backup capacity satisfies 24 hours system's operate as normal.Direct supply via the transceiver cable to the items of equipment feed on the passage.
The beneficial effects of the utility model are to adopt to need not the common leaky coaxial cable of special processing or the unshielded cable with radio energy leakage effects, press the forward coupling scheme, adopt the environmental parameter balanced detector to overcome the environmental sensitivity influence, employing to the leaky coaxial cable equitable subsection to obtain behind the restriction cable length to good effect that improves the target detection reliability and the undue reduction that limits relative detection sensitivity effectively, finally the quantity with the electron device commercialization module that adopted in an amount of increase system after the cable segmentation is cost, realizes that the cost that reduces leaky coaxial cable significantly provides a kind of ratio of performance to price more rational circumference Intrusion Prevention System to market.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is system's composition diagram
Fig. 2 is a low pass separation filter structural drawing
Fig. 3 is a high frequency matched load structural drawing
Fig. 4 is an environmental parameter balanced detector structural drawing
Fig. 5 is a paragraph warning extension set structural drawing
Fig. 6 is system alarm controller architecture figure
Fig. 7 is the cloth-net-type perimeter structure figure of branch
Fig. 8 is low pass separation filter distressed structure figure
Embodiment
The utility model provides a kind of circumference Intrusion Prevention System.System forms example referring to accompanying drawing 1～accompanying drawing 8.
The utility model adopts two common leaky coaxial cables as intrusion sensor, is parallel to each other and keeps certain distance, gives under the face of land along the circumference shallow embedding of required protection.In the present embodiment, the parallel distance of two cables keeps 1～2m, and buried depth keeps 0.1～0.2m.
System forms referring to accompanying drawing 1.Substantially comprise the leaky coaxial cable 7A～7F that posts a letter, collection of letters leaky coaxial cable 8A～8F, calling module 1A～1F, collection of letters module 2A～2F, high frequency matched load 3, low pass separation filter 4, environmental parameter balanced detector 5A～5C, paragraph warning extension set 6A～6C, system alarm controller 9 and system power supply 10.
The leaky coaxial cable that is adopted in the present embodiment need not that outer conductor is carried out specialties such as perforate or fluting and processes, also need not particular design to pursue its leakage energy along cable length " energy cascade is sewed " effect of gradual change step by step, only adopt common concentric cable, braid angle to its outer conductor is adjusted, and the photoelectricity cover ratio that changes its outer conductor promptly dredged to compile to the outer conductor of its multiply braiding and handles and answer and can satisfy request for utilization with duplex sheath, and its cost is than the leaky coaxial cable of special-purpose special requirement about order of magnitude that descends.
Article two, leaky coaxial cable is foundation along its total length by reasonably relative detection sensitivity, is divided into some isometric paragraphs, as leaky coaxial cable 7A～7F and the collection of letters leaky coaxial cable 8A～8F of posting a letter in the accompanying drawing 1.At least require to keep on the collection of letters cable in adjacent two transceiver paragraphs such as the accompanying drawing 1 7A, 7B, 8A, 8B or 7C, 7D, 8C, 8D or 7E, 7F, 8E, 8F be isometric and its paragraph is divided and should be obeyed the principle that it adds up to even number.In the present embodiment, the about slightly 50m of each paragraph length of 7A～7F, 8A～8F.
Wiring relation in the system between each parts as shown in Figure 1.The post a letter termination of leaky coaxial cable 7A-7F of each section is gone into calling module 1A-1F, and the other end of the cable 7A-7F that posts a letter links with low pass separation filter 4 after inserting high frequency matched load 3 separately in advance again.Adjacent two calling modules such as 1B, 1C or 1D, 1E etc. are common to insert a low pass separation filter 4.The termination of each section collection of letters leaky coaxial cable 8A-8F is gone into to collect mail and is linked with low pass separation filter 4 behind the module 2A-2F again.Two neighboring sections collection of letters leaky coaxial cable is by low pass separation filter 4 of the common access of collection of letters module separately.The omnidistance destination of the system that is positioned to the other end of the collection of letters cable of terminal such as 8F directly and system alarm controller 9 be connected.The calling module 1F of close system terminal and alarm controller 9 are connected with system power supply 10 by low pass separation filter 4 separately.Two collection of letters modules of adjacent paragraph such as the radiofrequency signal output terminal of 2A, 2B are connected with environmental parameter balanced detector such as 5A respectively, and the output terminal of environmental parameter balanced detector such as 5A is connected with low pass separation filter 4 after being connected with paragraph warning extension set such as 6A earlier again.6 paragraph A～F have only been provided in the present embodiment.By identical connection relation, system scale can be expanded to the more multistage that satisfies actual needs and fall.
The low pass separation filter 4 that connects between each section transceiver cable 7A～7B and the 8A～8B, its structural representation as shown in Figure 2, mainly form low-pass filter by inductor L and capacitor C, VHF high-frequency work frequency range is realized isolating, but allow feedthrough direct supply and intermediate frequency or low-frequency control signal.Used the inductor L of two equivalences in the accompanying drawing 2.2 inner wires with the transceiver cable of A, B link in the accompanying drawing 2, and the outer conductor of D point and transceiver cable links, and the C point connects the intermediate frequency alerting signal input/output point of paragraph warning extension set 6A～6C.When low pass separation filter 4 is connected in the cable of posting a letter, can contact C is idle.
Each post a letter cut cable 7A～7F and the opposing other end access high frequency matched load 3 of calling module 1A～1F, its structural representation as shown in Figure 3.Mainly form, be complementary with the equiva lent impedance of access leaky coaxial cable by capacitor and resistor.In the present embodiment, equiva lent impedance R is 75 Ω, in the accompanying drawing 32 of A, B with post a letter cable internal and external conductor and connecing.
Calling module 1A～1F and collection of letters module 2A～2F adopts the radio signal of continuous carrier, transmit-receive cofrequency, works in the VHF very high frequency band.Adjacent paragraph adopts the frequency of operation of different channels, to prevent the radio co-channel interference.In the present embodiment, the working frequency range of transceiver module is recommended as 30MHz～60MHz, and channel spacing is recommended as 25KHz.
When calling module 1A～1F worked, by the electromagnetic coupled effect of posting a letter between leaky coaxial cable and the collection of letters leaky coaxial cable, collection of letters module 2A～2F received radio signal and can detect the amplitude variation and the phase change of this signal.As no personnel's illegal invasion, the amplitude of this signal should have relative constant average with phase place on the circumference paragraph that system takes precautions against.If adjacent two paragraph A and B, C and segment length such as D, E and F equate substantially, the cable burial environment is basic identical, between transceiver level, cable transmission attenuation, transceiver cable during factor basically identical such as coupling attenuation, with paragraph A, B is example, and collection of letters module 2A and 2B should export approximately equalised two range signal A1, A2 and two phase signal P1, P2.Above-mentioned approximately equalised four outputs of collection of letters module 2A and 2B insert environmental parameter balanced detector 5A and are compared.
The structural representation of environmental parameter balanced detector 5A～5C as shown in Figure 4.In four input ends, A1 and A2 are the amplitude output signal of two adjacent collection of letters modules; P1 and P2 are the phase place output signal of two adjacent collection of letters modules, and four signals insert OP1 and OP2 respectively.OP1 is that range signal comparer, OP2 are the phase signal comparer.When on the circumference illegal invasion situation not taking place, owing to OP1 and OP2 two input signals separately do not have output near balance.Burying at leaky cable that environmental factor changes mainly as the soil water-containing state underground is that conductivity is when changing, this kind changes the common mode variations that takes place slowly and compensates each other at two input ends of OP1 and OP2 on two equal paragraphs, thereby obtains the neutral equilibrium effect and exempt the influence of environmental change to coupling attenuation.When the illegal invasion situation takes place on circumference, with the amplitude output of the collection of letters module of invasion paragraph direct correlation and phase place is exported both one of or both can have greatly changed.By the comparison of OP1 and OP2, the output of the forward of its amplitude and phase place is exported the testing result of representing two different paragraphs respectively with negative sense.The amplitude detection signal of forward output is attached to the input end that compares to determine device OP3 by diode D1, compares with the threshold level of setting; The phase detection signal of forward output is attached to the input end that compares to determine device OP4 by diode D2, compares with the threshold level of setting.The amplitude detection signal of negative sense output is attached to the input end that compares to determine device OP5 by diode D3, compares with the threshold level of setting; The phase detection signal of negative sense output is attached to the input end that compares to determine device OP6 by diode D4, compares with the threshold level of setting.The output of OP3 and OP4 by OR1's or gate logic provide testing result from T1 end.The output of OP5 and OP6 by OR2's or gate logic provide testing result from T2 end.Certain relevant paragraph generation illegal invasion in adjacent two paragraphs is promptly represented in the significant level output of OR1 or OR2.Therefore, no matter which paragraph generation illegal invasion, the amplitude of its received signal or the variation of phase place is detected and compare with the threshold level of setting.Exceed limit value as comparative result, this paragraph promptly provides alerting signal.
The structural representation of paragraph warning extension set 6A～6C as shown in Figure 5.The circuit connection relation is as follows: two input end INA and INB represent the warning output of two adjacent paragraphs respectively, insert by the T1 and the T2 output terminal of environmental parameter balanced detector,
RespectivelyBe attached to input time delay circuit 11 and 15, alerting signal is finished time-delay identification back control address switch 12 and 16, address switch 12 and 16 connects code translator 13 and 17, the output of code translator 13 and another road input interface-demodulator 20 of 17.Code translator 13 and squegger 19 work of 17 output control intermediate frequency also provide the coding of warning address paragraph respectively to scrambler 14 and 18.Modulator 21 is received in the output of intermediate frequency squegger 19 and scrambler 14 and 18.Modulator 21 and detuner 20 are bound up, and link to each other with the C point of low pass separation filter as the IN/OUT of paragraph warning extension set 6A～6C.In the present embodiment, the frequency of operation of intermediate frequency squegger 19 can be selected 455KHz or 200KHz, and code translator 13,17 and scrambler 14,18 can use the monolithic coder.
Each paragraph warning extension set provides the warning output of two adjacent paragraphs, when on circumference, not invading situation, INA or INB all do not have input signal, address switch 12 and 16 is failure to actuate, code translator 13 coincide consistent with 17 address code with the address code of finishing in advance, when the system alarm controller was pressed some cycles touring scanning is detected to each paragraph warning extension set, finishing in turn shakes hands replied.In a single day illegal invasion takes place in a certain paragraph, suppose that the INA input provides one section by the low level pulse that uprises, after 11 pairs of alerting signals of input time delay circuit are finished time-delay identification, 12 displacements of control address switch, changed the address state of code translator 13, and control intermediate frequency squegger 19 makes it to quit work, and when the system alarm controller is patrolled and examined this paragraph once again, replys loop and interrupts and report to the police on the terminal alarm controller owing to shake hands.The failure of oscillation of intermediate frequency squegger 19 can not recover automatically, must be resetted by the system terminal manually-operated.Adopt in the present embodiment the disconnected way of cutting and reclosing of the feed of collection of letters cable is finished resetting of RST1 and RST2 end.
The collection of letters terminal of system is at the terminal connecting system alarm controller 9 of collection of letters cable.The structural representation of system alarm controller 9 as shown in Figure 6.The circuit connection relation is as follows: connect modulator 22 outputs and detuner 23 inputs with the I/O end IN/OUT that collection of letters cable directly links to each other, 23 outputs link to each other with coder 24 with demodulator in modulator 22 inputs, the address of coder 24 is produced by serial counter 25, and address code can the volume capacity be 29 promptly 512 kinds in the present embodiment.The output one tunnel of pulse oscillator 26 is connected to coder 24, and the second the tunnel is connected to timer 27, and Third Road is connected to intermediate frequency squegger 33, and RST is its reset terminal.The output of timer 27 driver 28 taking alarm, its output tap sonic alarm 29 sum counters 30.The output of counter connects code translator 31, and the output of code translator 31 connects digital luminous display circuit 32.
The utility model allows with arbitrarily and the mode that the connects circumference intrusion defense task of arranging net to bear any branch formula by a plurality of branches of shape multiple connection of the required protection circumference of reality.Circumference Intrusion Prevention System synoptic diagram such as accompanying drawing 7 that complex form is arranged net have been provided in the present embodiment.The low pass separation filter that it is characterized in that system has branch's distressed structure, the collection of letters of system and the binding of two leaky coaxial cables of posting a letter by low pass separation filter branch expansion end with and the mode of connection that connects by the circumference intrusion defense of a plurality of branches of shape multiple connection to realize that branch's formula distressed structure is arranged net of the required protection circumference of reality.The single line bar pathway figure that lays two leaky coaxial cables and isolate the signal of segmentation has only drawn in the accompanying drawing 7.Adjacent segment is followed in the division of paragraph, and isometric to keep adjacent two transceiver paragraphs on the collection of letters cable at least be isometric and paragraph adds up to the principle of even number.Present embodiment used the low pass separation filter 39 of 4 distortion in accompanying drawing 7, provided 4 branches totally 26 paragraphs concentrate the arrange net synoptic diagram of circumference Intrusion Prevention System of branch's formulas of monitoring by terminal system alarm controller 9.Accompanying drawing 7 is compared with accompanying drawing 1, and unique equipment that needs to change is the low pass separation filter distressed structure that needs to insert on take-off point as shown in Figure 8.Accompanying drawing 8 can be got by accompanying drawing 2 distortion, has used the inductor L of three equivalences.Pick out the collection of letters and the leaky cable branch that posts a letter by the E terminal, when the low pass separation filter 39 of distortion is connected on the cable branch point of posting a letter, can contact C is idle.
When the utility model is applied in the complicated circumference Intrusion Prevention System that must insert the too much paragraph warning extension set of quantity, allow to be out of shape shown in the dotted line in accompanying drawing 5 and the accompanying drawing 6 to the structure of the paragraph warning extension set shown in the accompanying drawing 5 and to the structure of the system alarm controller shown in the accompanying drawing 6.The address switch that dotted line is shown in 12 of accompanying drawing 5 and 16 output terminal are received respectively and are sent out number controller 35,36, DTMF transmitter 37,38 is received in its output, and the medium and low frequency alerting signal I/O end IN/OUT that paragraph warning extension set is received in the output of DTMF transmitter 37,38 links to each other with the C point of low pass separation filter.The passage that collection of letters leaky coaxial cable 8A in the present embodiment～8F constitutes is a substantially transparent to the transmission of double-audio signal.The I/O end IN/OUT that the dotted line of accompanying drawing 6 is shown in system alarm controller 9 inserts dtmf receiver 34, the output of dtmf receiver 34 driver 28 that receives the report for police service.In case the time that illegal invasion takes place on the circumference of setting up defences is in the gap of system alarm controller cycle visiting tour just, the alerting signal of invasion paragraph promptly can dtmf signal moment on same passage finish initiatively and report to the police, to avoid alert and fail to report.Resetting of DTMF transmitter 37,38 and dtmf receiver 34 must be adopted the disconnected way of cutting and reclosing of the feed of collection of letters cable is finished resetting of paragraph warning extension set RST end in the present embodiment by alarm terminal operator on duty manually-operated.
The collection of letters cable of system terminal and post a letter cable all by low pass separation filter 4 connecting system power supplys 10.In this practical example, system power supply adopts direct current 18V or 24V and takes into account and exchanges power failure reserve battery automatic switching function, and the power backup capacity can satisfy 24 hours system's operate as normal.System power supply via post a letter cable or collection of letters cable from passage top to terminal to the items of equipment feed on the passage, no matter insert any parts on the passage, all can not hinder presenting of direct supply.
Claims (8)
- The circumference Intrusion Prevention System of principle is sewed in 1 one kinds of radio electromagnetsm fields, it is characterized in that adopting and post a letter and collect mail with two common leaky coaxial cables, along the omnidistance parallel lay-up of the circumference of required strick precaution, shallow embedding in the face of land down and along the isometric segmentation of its total length, paragraph adds up to even number, every section both sides are inserted calling module and collection of letters module respectively, article two, realize the forward coupling of radio electromagnetsm field between cable, between per two adjacent paragraphs of the collection of letters cable environmental parameter balanced detector is set, and provides the alarm indication of invasion alert paragraph by the access of paragraph warning extension set and system alarm controller.
- 2 systems according to claim 1, two common leaky coaxial cables that it is characterized in that in the system being adopted are conventional Weaving type radio frequency coaxial-cable, only the outer conductor of its multiply braiding are dredged to compile and handle and answer with duplex sheath.
- 3 systems according to claim 1 is characterized in that two cables of system are divided into isometric some paragraphs along its total length, keep at least that adjacent two transmitting-receiving paragraphs are isometric on the collection of letters cable, and its paragraph is divided and should be obeyed the principle that it adds up to even number.
- 4 systems according to claim 1, two cables that it is characterized in that system by claim 3 segmentation after, wherein one is called the cable of posting a letter, the every section cable of posting a letter inserts a calling module; Another is called collection of letters cable, and every section collection of letters cable inserts a collection of letters module, and the collection of letters module that post a letter calling module that cable connect and collection of letters cable the are connect same both sides of laying paragraph that are placed in have the architectural feature that forward is coupled.
- 5 systems according to claim 1, it is characterized in that in the system on the same cable two ends that are placed in of two calling modules between the adjacent paragraph, two collection of letters modules are arranged at a place in pairs, transmission direction on per two adjacent paragraph collection of letters cables has the form feature that goes in the same direction, and has the calling module that is connected on the cable two ends of posting a letter only and is setting separately.
- 6 systems according to claim 1 is characterized in that in the system that two collection of letters modules being provided with in pairs on the adjacent paragraph divide differential to go into the environmental parameter balance controller about four output results of amplitude and phase place.
- 7 systems according to claim 1 is characterized in that the system alarm controller in the system is connected the channel end of collection of letters cable, and the alert paragraph of confirming is provided alarm indication.
- 8 according to the described system of claim 1, it is characterized in that system allow with and the connected mode that connects by the circumference intrusion defense of a plurality of branches of shape multiple connection to realize that branch's formula distressed structure is arranged net of the required protection circumference of reality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03209915 CN2718692Y (en) | 2003-08-21 | 2003-08-21 | Circum ferential invasion guard system for radio electromagnetic field leakage theory |
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| CN 03209915 CN2718692Y (en) | 2003-08-21 | 2003-08-21 | Circum ferential invasion guard system for radio electromagnetic field leakage theory |
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| CN102110865A (en) * | 2011-01-27 | 2011-06-29 | 电子科技大学 | Leakage coaxial cable |
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| CN106327755A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Security and protection cable |
| CN106327756A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security and protection system |
| CN106504455A (en) * | 2015-09-06 | 2017-03-15 | 奇点新源国际技术开发(北京)有限公司 | The method of manufacture cable |
| CN107067606A (en) * | 2017-04-13 | 2017-08-18 | 桂林龙隐科技有限公司 | Wisdom perceptual positioning fence system based on Internet of Things wireless induction |
| CN110988276A (en) * | 2019-12-29 | 2020-04-10 | 鲸岛(杭州)科技有限公司 | Ground automatic monitoring equipment of environmental air environmental protection |
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2003
- 2003-08-21 CN CN 03209915 patent/CN2718692Y/en not_active Expired - Fee Related
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| CN102110865B (en) * | 2011-01-27 | 2013-03-13 | 电子科技大学 | Leakage coaxial cable |
| CN102110865A (en) * | 2011-01-27 | 2011-06-29 | 电子科技大学 | Leakage coaxial cable |
| CN106327755B (en) * | 2015-06-26 | 2019-03-29 | 奇点新源国际技术开发(北京)有限公司 | Security protection cable |
| CN106285191A (en) * | 2015-06-26 | 2017-01-04 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security protection network and perimeter security means of defence |
| CN106297122A (en) * | 2015-06-26 | 2017-01-04 | 奇点新源国际技术开发(北京)有限公司 | Security protection wall and detector |
| CN106327755A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Security and protection cable |
| CN106327756A (en) * | 2015-06-26 | 2017-01-11 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security and protection system |
| CN106297122B (en) * | 2015-06-26 | 2019-05-03 | 奇点新源国际技术开发(北京)有限公司 | Security protection wall and detector |
| CN106285191B (en) * | 2015-06-26 | 2018-09-07 | 奇点新源国际技术开发(北京)有限公司 | Perimeter security protection network and perimeter security means of defence |
| CN106504455A (en) * | 2015-09-06 | 2017-03-15 | 奇点新源国际技术开发(北京)有限公司 | The method of manufacture cable |
| CN106504455B (en) * | 2015-09-06 | 2019-03-29 | 奇点新源国际技术开发(北京)有限公司 | The method for manufacturing cable |
| CN107067606A (en) * | 2017-04-13 | 2017-08-18 | 桂林龙隐科技有限公司 | Wisdom perceptual positioning fence system based on Internet of Things wireless induction |
| CN107067606B (en) * | 2017-04-13 | 2023-03-10 | 北京电栏科技有限公司 | Intelligent sensing and positioning fence system based on wireless sensing of Internet of things |
| CN110988276A (en) * | 2019-12-29 | 2020-04-10 | 鲸岛(杭州)科技有限公司 | Ground automatic monitoring equipment of environmental air environmental protection |
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