CN104021638A - Method and device for preventing cable along highway from being stolen through early warning - Google Patents
Method and device for preventing cable along highway from being stolen through early warning Download PDFInfo
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- CN104021638A CN104021638A CN201410313742.XA CN201410313742A CN104021638A CN 104021638 A CN104021638 A CN 104021638A CN 201410313742 A CN201410313742 A CN 201410313742A CN 104021638 A CN104021638 A CN 104021638A
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Abstract
The invention discloses a method and device for preventing a cable along a highway from being stolen through early warning. The method comprises the steps: 1, simultaneously laying a sensing optical cable and the cable along the highway; 2, connecting a sensing optical cable terminal box with a main controller by adopting a guide optical cable; 3, extracting a vibration waveform of a distribution region of the cable along the highway by adopting a light source module, an optical path coupling module and an optical detection module inside the main controller; 4, analyzing waveform characteristics of a vibrating signal of an optical fiber under two kinds of elements; 5, extracting a signal output by the main controller by adopting a main control computer; 6, alarming a vibration element and recording in a waveform characteristic database, wherein the sensing optical cable terminal box is respectively connected with the sensing optical cable, the cable and the guide optical cable, the main controller is connected with the guide optical cable, the main controller is connected with an optical fiber signal analyzer through the guide optical cable, and the optical fiber signal analyzer is connected with the main control computer. According to the method, the alarming probability is increased, the missed alarming probability is reduced, the false alarm probability is reduced, the locating precision is improved, and the response time is shortened.
Description
Technical field
The invention belongs to Traffic Information Engineering field, be specifically related to a kind of from the micro-vibration of optical fiber, set about for the antitheft method of highway cable early warning along the line, also relate to simultaneously a kind of from the micro-vibration of optical fiber, set about for the antitheft device of highway cable early warning along the line, be applicable to the antitheft work of early warning of highway cable along the line.
Background technology
Freeway Traffic Engineering Project comprises supervisory system, Fare Collection System, communication system etc., it is the important technical of freeway traffic situation information acquisition, communication, control and management, a large amount of outfield electromechanical equipments and indoor computer network system, consist of, the unattended power cable that need to lay suitable distance guarantees that it normally works.
Yet highway high-low pressure cable becomes offender's pilferage object.Because incidence of cases increases day by day, several ten thousand yuan at least of the economic losses causing, at most units up to a million.The stolen normal Operation and management that has badly influenced highway of highway cable.When causing national wealth heavy losses, also the vehicle moving is formed to huge potential safety hazard on highway, cause direct or indirect economic loss difficult to the appraisal.Therefore how effectively the safety of cable to be monitored, before the destroyed theft of cable, give warning in advance, significant to the normal operation of Freeway Traffic Engineering Project.
Main cable theft-prevention method comprises both at home and abroad at present:
1) professional duty personnel carries out inspection on duty.This kind of method is only applicable to place, walled place, as school, factory, warehouse, machine-operated compound etc., is difficult to realize monitoring completely, and need expends a large amount of manpower and materials.
2) underground laying:
Current supply cable is put to the hard plastic tube of protection use or be through to bury in concrete comb and spread on undergroundly, because underground cable has good disguise and protectiveness, can play good anti-theft function.But it is large to bury deposited underground cable quantities, and cost is high, and Inspection and maintenance inconvenience, is therefore only usually used in electrical network density large, the Urban Areas that transmission range is nearer.
3) adopt electronic device to carry out monitoring and protecting:
On cable, load onto monitoring, alarming instrument (power carrier, GPRS etc.), when cable is stolen while cutting, instrument sends alerting signal and notifies the relevant personnel to arrest in time offender, by this deterrent effect, reaches the protection to cable.The application of these technology and product has reduced the time of finding the stolen event of cable and post-processed greatly.But such technology is reported to the police after cutting cable is stolen, can not prevent trouble before it happens, cable is stolen to be cut brought loss and still can not avoid.
Summary of the invention
The present invention be directed to the problem of above-mentioned present situation and existence, object is to be to provide a kind of antitheft method of highway cable early warning along the line of utilizing the micro-vibration of optical fiber, easy to implement the method, easy and simple to handle, improve alarm rate, reduce false dismissed rate, reduce the alert rate of mistake, improve positioning precision, shorten the response time.
Another object of the present invention is to be to provide a kind of antitheft device of highway cable early warning along the line that utilizes the micro-vibration of optical fiber, simple in structure, easy to use.
In order to realize above-mentioned object, the present invention adopts following technical measures:
The present invention is based on the principle of the micro-vibration of optical fiber, vibrating sensing optical fiber and cable are laid simultaneously, when cable along the line starts stolen digging, extraneous vibration changes the transmission phase place of light wave in sensor fibre, thereby causes the interference pattern of the micro-vibration of optical fiber to change.Forewarning Terminal system obtains extraneous vibration signal by detecting interference signal, and then makes alarm decision by the analysis to vibration signal waveforms, can obtain vibration position by location algorithm simultaneously, realizes the location of alert event, completes early warning antitheft.
The antitheft method of highway cable early warning along the line of utilizing the micro-vibration of optical fiber, the steps include:
1) adopt sensing optic cable and highway cable along the line to lay simultaneously; In described step 1), sensing optic cable model is outdoor road groove (model: GLFXTS-42B1.1) for the communication of steel-pe sheath.
2) adopt guiding optical cable that sensing optic cable termination box is connected with master control instrument; Described step 2), in, guiding optical cable model is entirely nonmetal/fire-retardant/resistance to loose sleeve layer strand type duct optical cable of eroding.
3) adopt master control instrument inside to extract highway laying cable domain oscillation along the line waveform character (waveform temporal signatures and signal frequency domain):
A) highway fiber-optic signal along the line is divided into man induced event's vibration signal and normal driving vibration signal;
B) determine that sensing optic cable termination box is for gathering section;
C) gather the fiber-optic vibration signal waveform feature causing under man induced event's interference behaviors such as () excavating, beat;
D) gather the fiber-optic vibration signal waveform feature that the driving vibration under highway varying service level causes;
4) analyze fiber-optic vibration signal waveform feature under two class events, utilize fiber-optic signal analyser to analyze signal waveform feature, business mathematics software-Matlab2013b the version that adopts U.S. MathWorks company to produce is set up respectively two class emulation optical signal detecting models, forms alert event photosignal waveform property data base;
5) adopt main control computer to extract master control instrument output signal, show the circuit situation along the line that detects, contrast waveform character database, the micro-vibration early warning of the optical fiber software that operation Wuhan optical valley Ao Yuan Science and Technology Co., Ltd. produces, judges whether vibration event to report to the police;
6) if need carry out alarm treatment to vibration event in step 5), according to formula (1), the positional information of vibration signal is revised;
(1) in formula: n represents the quantity of signal segment; The n time correction result of En presentation of events locating information; Sn represents the locating information of n signal segment recording.
7) if without processing that vibration event in step 5) is reported to the police, charge to waveform character database.
Highway cable machinery maintenance along the line and testing can be closed GPZ before carrying out, and after maintenance job completes, reopen.
The adoptable device of a kind of highway cable early warning theft preventing method along the line, it is comprised of 8 parts such as sensing optic cable termination box, sensing optic cable, cable, guiding optical cable, master control instrument (IFP3800-MC comprises 3 modules such as light source module, light path coupling module and photo-detector module), guiding optical cable, fiber-optic signal analyser (FPT3800), main control computers.Its annexation is: sensing optic cable termination box respectively with sensing optic cable, cable, the first guiding optical cable is connected, master control instrument is connected with sensing optic cable termination box by the first guiding optical cable, connection by above 5 parts is achieved as follows function: the light source module of master control instrument sends light wave, through the first guiding optical cable transmission to sensing optic cable termination box, then along sensing optic cable, propagate, when the external world has vibration to occur, lightwave signal changes, sensing optic cable is passed light wave vibration signal back sensing optic cable termination box, via the first guiding optical cable, import light wave vibration signal into master control instrument again, master control instrument extracts the time domain of light wave vibration signal and frequency domain special medical treatment, wherein cable is for needing to detect the cable of protection, master control instrument is connected with fiber-optic signal analyser by the second guiding optical cable, its role is to: by guiding optical cable, the signature waveform of extraction is transferred to fiber-optic signal analyser and analyze, fiber-optic signal analyser is connected with main control computer, its role is to: main control computer extracts the output signal of fiber-optic signal analyser and carries out subsequent treatment, the micro-vibration early warning system of operation optical fiber software.
The present invention compared with prior art, has the following advantages and effect:
Before cable is stolen, just early warning can be realized, the effect preventing trouble before it happens can be reached; Optical fiber has advantages of that unrepeatered transmission distance is long, compares with the system that adopts electronic device to detect protection, and the present invention relies on little to the energy, and the sensing network that whole guarded region is laid all need not electric power supply.
Improve the alarm rate of the stolen event of cable, reduce false dismissed rate, improve state event location precision, the security level of Improving Expressway cable along the line.The present invention does not affect maintenance and the detection of highway cable along the line simultaneously.Have following some:
1, improve alarm rate: the probability >95% that makes warning to stealing the correct judgement of cable event;
2, reduce false dismissed rate: the probability of omitting warning to stealing cable event is 0;
3, reduce the alert rate of mistake: to stealing cable event, make the probability <5% that false judgment causes false alarm;
4, improve positioning precision: the precision to the judgement of alert event occurrence positions is better than 100m;
5, shorten the response time: pilferage event occurs to be less than 10ms to the time that system is made a response (comprising light wave transmissions time and circuit system response time).
Accompanying drawing explanation
Fig. 1 is the adoptable device signal of a kind of highway cable early warning theft preventing method along the line;
Wherein: sensing optic cable termination box 1, sensing optic cable 2, cable 3, guiding optical cable 4, master control instrument 5(IFP3800-MC), guiding optical cable 6, fiber-optic signal analyser 7(FPT3800), 8 parts such as main control computer 8 form.
Embodiment
embodiment 1:
The present invention according to the principle of the micro-vibration of optical fiber to the antitheft proposition method for designing of highway cable early warning along the line: during stolen beginnings of cable along the line, extraneous vibration changes the transmission phase place of light wave in sensor fibre, thereby causes the interference pattern change of the micro-vibration of optical fiber.Forewarning Terminal obtains extraneous vibration signal by detecting interference signal, and then makes alarm decision by the analysis to vibration signal waveforms, can obtain vibration position by location algorithm simultaneously, realizes the location of alert event, completes early warning antitheft.
The present invention, by the design of highway cable early warning theft preventing method along the line, improves the alarm rate of the stolen event of cable, reduces false dismissed rate, improves state event location precision, the security level of Improving Expressway cable along the line.The present invention does not affect maintenance and the detection of highway cable along the line simultaneously.
Setting of the present invention can be with reference to figure 1.In example, selected speed limit be 100km/h, two-way six-lane from the dark highway of tabernaemontanus bulrush Dongguan section.Fiber-optic vibration signals collecting is selected under different weather condition, complete under different Assessment of Serviceability of Roads vibration and different man induced event in vehicle operational process and vibrate lower fiber-optic vibration signals collecting, and in strict accordance with institute of the present invention requirement, other disturbing factors in collection signal data procedures, have been got rid of.
A highway cable early warning theft preventing method along the line that utilizes the micro-vibration of optical fiber, the steps include:
1) adopt sensing optic cable 2 and highway cable 3 along the line to lay, wherein sensing optic cable 2 is laid in 50cm place directly over cable simultaneously, and middle employing fragment of brick is isolated; Wherein: sensing optic cable model is outdoor road groove (model: GLFXTS-42B1.1) for the communication of steel-pe sheath.
2) adopt guiding optical cable 4 that sensing optic cable termination box 1 is connected with master control instrument; Wherein: guiding optical cable model is entirely nonmetal/fire-retardant/resistance to loose sleeve layer strand type duct optical cable of eroding.
3) adopt 5 pairs of highway laying cable domain oscillation along the line waveform characters of master control instrument (first to extract the time dependent feature of waveform, the form, the position that comprise time domain waveform, adopt Fourier transform that dynamic waveform is transformed to frequency domain by time domain simultaneously, extract the composition characteristic of different frequency component composition) extract;
A) highway fiber-optic signal along the line is divided into man induced event's vibration signal and normal driving vibration signal;
B) determine that sensing optic cable termination box is for gathering section;
C) gather the fiber-optic vibration signal waveform feature causing under man induced event's interference behaviors such as () excavating, beat;
D) gather the fiber-optic vibration signal waveform feature that the driving vibration under highway varying service level causes;
4) analyze fiber-optic vibration signal waveform feature under two class events, utilize 7 pairs of signal waveform features of fiber-optic signal analyser to analyze, adopt Matlab software to set up respectively two class emulation optical signal detecting models, obtain alert event photosignal waveform property data base;
5) adopt main control computer 8 to extract master control instrument output signal, show the circuit situation along the line that detects, contrast waveform character database, the antitheft software of the operation micro-vibration early warning of optical fiber, judges whether vibration event to report to the police;
6), if need carry out alarm treatment to vibration event in step 5), report to the police after man induced event being positioned to Information revision according to formula (1);
(1) in formula: n represents the quantity of signal segment, the n time correction result of En presentation of events locating information, Sn represents the locating information of n signal segment recording.
7) if without processing that vibration event in step 5) is reported to the police, the fiber-optic vibration signal waveform feature data-in storehouse of vehicle operating being brought;
Highway cable machinery maintenance along the line and testing can be closed GPZ before carrying out, and after maintenance job completes, reopen.
Embodiment 2:
The adoptable device of a kind of highway cable early warning theft preventing method along the line, it,, by sensing optic cable termination box 1, sensing optic cable 2, cable 3, guiding optical cable 4, master control instrument 5(IFP3800-MC, comprises 3 modules such as light source module, light path coupling module and photo-detector module), guiding optical cable 6, fiber-optic signal analyser 7(FPT3800), 8 parts such as main control computer 8 form.Its annexation is: sensing optic cable termination box 1 respectively with sensing optic cable 2, cable 3, the first guiding optical cable 4 is connected, master control instrument 5 is connected with sensing optic cable termination box 1 by the first guiding optical cable 4, connection by above 5 parts is achieved as follows function: the light source module of master control instrument 5 sends light wave, through the first guiding optical cable 4, transfer to sensing optic cable termination box 1, then along sensing optic cable 2, propagate, when the external world has vibration to occur, lightwave signal changes, sensing optic cable 2 is passed light wave vibration signal back sensing optic cable termination box 1, via the first guiding optical cable 4, import light wave vibration signal into master control instrument 5 again, time domain and the frequency domain special medical treatment of 5 pairs of light wave vibration signals of master control instrument are extracted, master control instrument 5 is connected with fiber-optic signal analyser 7 by the second guiding optical cable 6, its role is to: by guiding optical cable 6, the signature waveform of extraction is transferred to fiber-optic signal analyser 7 and analyze, fiber-optic signal analyser 7 is connected with main control computer 8, its role is to: the output signal that main control computer 8 extracts fiber-optic signal analyser 7 is carried out subsequent treatment, the micro-vibration early warning system of operation optical fiber software.
Claims (2)
1. the antitheft method of highway cable early warning along the line of utilizing the micro-vibration of optical fiber, the steps include:
1) adopt sensing optic cable and highway cable along the line to lay simultaneously;
2) adopt guiding optical cable that sensing optic cable termination box is connected with master control instrument;
3) adopt master control instrument internal light source module, light path coupling module and photo-detector module to extract highway laying cable domain oscillation along the line waveform character:
A) highway fiber-optic signal along the line is divided into man induced event's vibration signal and normal driving vibration signal;
B) determine that sensing optic cable termination box is for gathering section;
C) gather the fiber-optic vibration signal waveform feature causing under man induced event;
D) gather the fiber-optic vibration signal waveform feature that the driving vibration under highway varying service level causes;
4) analyze fiber-optic vibration signal waveform feature under two class events, utilize fiber-optic signal analyser to analyze signal waveform feature, adopt mathematical software-Matlab2013b to set up respectively two class emulation optical signal detecting models, form alert event photosignal waveform property data base;
5) adopt main control computer to extract master control instrument output signal, show and detect circuit along the line, contrast waveform character database, the micro-vibration early warning of operation optical fiber software, judgement is reported to the police to vibration event;
6) vibration event in step 5) is carried out to alarm treatment, according to formula (1), the positional information of vibration signal is revised;
（1）
In formula: n represents the quantity of signal segment, the n time correction result of En presentation of events locating information, Sn represents the locating information of n signal segment recording;
7) without processing that vibration event in step 5) is reported to the police, charge to waveform character database;
8) maintenance of highway cable machinery along the line and testing are carried out and front GPZ are closed, and after maintenance job completes, reopen.
2. a kind of antitheft device of highway cable early warning along the line that utilizes the micro-vibration of optical fiber claimed in claim 1, it is by sensing optic cable termination box (1), sensing optic cable (2), cable (3), the first guiding optical cable (4), master control instrument (5), the second guiding optical cable (6), fiber-optic signal analyser (7), main control computer (8) forms, it is characterized in that: sensing optic cable termination box (1) respectively with sensing optic cable (2), cable (3), the first guiding optical cable (4) is connected, master control instrument (5) is connected with sensing optic cable termination box (1) by the first guiding optical cable (4), master control instrument (5) is connected with fiber-optic signal analyser (7) by the second guiding optical cable (6), fiber-optic signal analyser (7) is connected with main control computer (8).
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