CN116580516A - Optical fiber alarm system based on laser interference - Google Patents
Optical fiber alarm system based on laser interference Download PDFInfo
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- CN116580516A CN116580516A CN202310493574.6A CN202310493574A CN116580516A CN 116580516 A CN116580516 A CN 116580516A CN 202310493574 A CN202310493574 A CN 202310493574A CN 116580516 A CN116580516 A CN 116580516A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 164
- 230000003287 optical effect Effects 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 15
- 238000001514 detection method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 238000012552 review Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004556 laser interferometry Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
- G08B13/186—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using light guides, e.g. optical fibres
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- Burglar Alarm Systems (AREA)
Abstract
The application relates to the field of security equipment, in particular to an optical fiber alarm system based on laser interference, which comprises a laser emission module, wherein the laser emission module is connected with a first optical splitter, the first optical splitter is connected with a plurality of sensing optical fibers which are in one-to-one correspondence with preset boundary sections of security areas, each sensing optical fiber is connected with a corresponding light combiner, the first optical splitter is connected with a second optical splitter, the second optical splitter is connected with reference optical fibers which are in one-to-one correspondence with the light combiners, and the reference optical fibers are connected with the corresponding light combiners; each light combiner is connected with an interference judging device, the interference judging devices are connected with a processor, and the processor is connected with a display. The application has the effect of being convenient for knowing the approximate position of the intrusion of the outside personnel or things into the security area.
Description
Technical Field
The application relates to the field of security equipment, in particular to an optical fiber alarm system based on laser interference.
Background
In order to ensure the safety of large-area security areas such as factories, forests and the like and prevent outside personnel or things from submerging, certain perimeter security equipment needs to be deployed on the perimeter of the installation area.
A perimeter security device in the prior art comprises a laser transmitter, wherein two optical fibers distributed along the perimeter of a security area are connected to the laser transmitter, the optical fibers are connected with facilities preset at the perimeter of the security area, and one ends of the two optical fibers, which are far away from the laser transmitter, are also connected with interference judging equipment together; in the implementation, if an external person or animal enters the security area, the optical fiber is touched, so that the refractive index of the corresponding optical fiber part is changed, and the phase of the optical signal transmitted in the corresponding optical fiber is changed, so that the interference judging device judges that the interference phenomenon occurs, and if the interference phenomenon exists, the external person or animal can be judged to enter the security area.
In carrying out the present application, it has been found that the above-described technique has at least the following problems: because the security area is large, the perimeter length is relatively long, so that the length of the laid optical fiber is long, and the length can be in the range of several kilometers to tens of kilometers; as long as a certain part of the optical fiber changes in refractive index due to intrusion of external personnel or things, the interference phenomenon can be judged to occur by the judging device, so that intrusion of the external personnel or things is determined, but the approximate position of intrusion of the external personnel or things into the security area cannot be determined.
Disclosure of Invention
In order to facilitate understanding of the approximate position of an outside person or thing intruding into a security area, the application provides an optical fiber alarm system based on laser interference.
The application provides an optical fiber alarm system based on laser interference, which adopts the following technical scheme:
the optical fiber alarm system based on laser interference comprises a laser emission module, wherein the laser emission module is connected with a first optical splitter, the first optical splitter is connected with a plurality of sensing optical fibers which are in one-to-one correspondence with preset boundary sections of security areas, each sensing optical fiber is connected with a corresponding light combiner, the first optical splitter is connected with a second optical splitter, the second optical splitter is connected with reference optical fibers which are in one-to-one correspondence with the light combiners, and the reference optical fibers are connected with the corresponding light combiners; each light combiner is connected with an interference judging device, the interference judging devices are connected with a processor, and the processor is connected with a display.
By adopting the technical scheme, the laser emission module emits first source laser to the first beam splitter, the first beam splitter divides the first source laser into a plurality of detection lasers and transmits the detection lasers to the corresponding beam splitters from the corresponding sensing optical fibers, meanwhile, the first beam splitter also divides the source laser into a reference laser and transmits the reference laser to the second beam splitter, and the second beam splitter divides the reference laser into a plurality of sub-reference lasers which are in one-to-one correspondence with the plurality of beam splitters; each beam combiner receives detection laser and corresponding sub-standard laser, then combines the detection laser with the corresponding sub-standard laser to obtain combined laser, if an external person or object enters the placement area through a preset boundary section of a certain security area, the sensing optical fiber corresponding to the boundary section of the security area is touched, so that the sensing optical fiber is bent, the phase of the detection laser transmitted by the sensing optical fiber is changed, the interference judging device can judge that the combined laser can generate an interference phenomenon, a corresponding first intrusion electric signal is generated when the interference phenomenon occurs, and then the first intrusion electric signal is transmitted to the processor, so that the processor can judge that the bent sensing optical fiber occurs according to the first intrusion electric signal, and then can judge the approximate position of the external person or object intruding into the security area, and then corresponding position information is displayed on the display, so that the security person can know the approximate position of the external person or object intruding into the security area in time.
In a specific embodiment, the laser emission module includes a first laser source, and the first laser source is connected to a power automatic switcher, and the power automatic switcher is connected to at least a mains power supply and a green energy source; the automatic power supply switcher is also electrically connected with the interference judging device, the processor and the display.
Through adopting above-mentioned technical scheme, can be daily for first laser emission source, interference judgement ware, treater and display power supply through green energy source, accessible power automatic switch-over ware automatic switch-over to mains supply continue the power supply when green energy source temporarily unavailable, under the prerequisite of guaranteeing the power supply stability, greatly reduced mains supply energy consumption, promoted the energy-conserving nature and the feature of environmental protection of optical fiber alarm system based on laser interference.
In a specific embodiment, the automatic power switch is connected to a backup battery.
By adopting the technical scheme, under the condition that neither the commercial power supply nor the green energy source power supply can be used, the standby storage battery can be used for continuously supplying power for the optical fiber alarm system based on laser interference, so that the operation stability of the optical fiber alarm system based on laser interference is greatly improved.
In a specific implementation manner, the laser emission module comprises a second laser source connected with the automatic power supply switcher, the second laser source is connected with a third optical splitter, the third optical splitter is connected with reinspection optical fibers which are in one-to-one correspondence with the sensing optical fibers and are arranged side by side with the sensing optical fibers correspondingly, each reinspection optical fiber is connected with a photoelectric converter in communication connection with the processor, the photoelectric converter is connected with an electric signal change judging device, and an optical fiber identification code generating unit is connected between the electric signal change judging device and the processor.
By adopting the technical scheme, the second laser source is controlled to send second source laser to the third optical splitter while detecting through the sensing optical fiber, then the third optical splitter divides the second source laser into a plurality of reinspection beams which are in one-to-one correspondence with the sensing optical fibers, the reinspection beams are transmitted to the photoelectric sensor through the corresponding reinspection optical fibers, the photoelectric sensor converts the received optical signals corresponding to the reinspection beams into corresponding electric signals, if an external person or thing breaks into a certain boundary section of a security area, the corresponding reinspection optical fibers are touched, so that the reinspection optical fibers are touched to deform, then the propagation path of the reinspection beams in the reinspection optical fibers is changed, and then the electric signals generated by the photoelectric converter are changed, and then the electric signal change judging unit judges whether the electric signals generated by the photoelectric converter are changed or not; the accuracy of the processing judging structure can be improved through the cooperation of the review optical fiber and the sensing optical fiber.
In a specific implementation manner, the light combiner is connected with a light input judging unit, and the light input judging unit is used for judging whether the sensing optical fiber and the reference optical fiber transmit corresponding light signals to the corresponding light combiner or not; the light input judging unit is connected with the processor.
Through adopting above-mentioned technical scheme, can judge through the input judging unit whether all have corresponding signal in the response optic fibre and the reference optical fiber that are connected with the light combiner to whether the response optic fibre that is convenient for judge corresponds is normal with the reference optical fiber, and sends the judgement result to the treater when abnormal, thereby be convenient for the treater to show the judgement result on the display, and then the staff of being convenient for in time overhauls according to the detection optic fibre and/or the reference optical fiber that the judgement result corresponds.
In a specific implementation manner, a reference optical signal judging unit is connected between the light combiner and the corresponding interference judging device, and the reference optical signal judging unit is used for judging whether the optical signal emitted by the corresponding light combiner is the optical signal input into the light combiner through the corresponding reference optical fiber; the reference light signal judging unit is connected with the processor, and the processor is connected with the alarm module.
By adopting the technical scheme, the reference light signal judging unit is used for judging the beam combination laser emitted by the beam combination device, judging whether the beam combination laser is only the light signal input by the second beam splitter, if so, indicating that the sensing optical fiber is artificially damaged, and immediately sending a corresponding alarm electric signal to the processing after judging that the beam combination laser is only the light signal input by the second beam splitter, so that the processor can conveniently display the corresponding sensing optical fiber position information on the display according to the corresponding alarm electric signal, and the security personnel technology is convenient to process the sensing optical fiber with the problem.
In a specific embodiment, the alarm module comprises an indoor alarm and/or an outdoor alarm electrically connected to the processor.
Through adopting above-mentioned technical scheme, the treater is in judging that the condition that external personnel or things intruded appears in a certain boundary section of security area, sends alarm information to security personnel through indoor alarm immediately to send warning information to external personnel or things that intrude through outdoor alarm, thereby the security personnel of being convenient for in time learn the emergence of intrusion event, and in time handle intrusion event, still be convenient for in time get rid of external personnel or things that intrude, thereby promote security area's early warning timeliness and security.
In a specific embodiment, the alarm module comprises a wireless alarm signal transmitting unit electrically connected with the processor, and the wireless alarm signal transmitting unit is connected with the intelligent terminal in a wireless communication manner.
Through adopting above-mentioned technical scheme, after the processor judges that there is the emergence of break-in event, the processor sends corresponding alarm information to the intelligent terminal that the security personnel who is in the patrol state carried through wireless alarm signal to the security personnel who is in the patrol state is convenient for in time go to the place of occurrence of break-in event, and carries out handling to the break-in event, so the timeliness of being convenient for promote break-in event processing.
In a specific implementation manner, an encoder is connected between each interference judging device and the processor, and the encoder is used for adding an identification code into the electric signal output by the implementation photoelectric converter to obtain a corresponding code, and the code is sent to the processor.
By adopting the technical scheme, after the interference judging device judges that the interference phenomenon occurs, the encoder is convenient for adding the identification code into the electric signal sent by the interference judging device, and the electric signal and the braiding code form a coding together, so that the processor can process the coding conveniently, and the position of the touched sensing optical fiber is determined according to the identification code in the coding.
In a specific embodiment, an identification code analysis unit is connected between the encoder and the processor, and the identification code analysis unit is used for identifying the identification code in the code and sending the identification code to the processor.
By adopting the technical scheme, the identification code analysis unit is convenient for analyzing the identification code in the coding code before sending the coding code to the processing, and directly sending the identification code to the processor, so that the processor can conveniently determine the position of the touched sensing optical fiber directly through the identification code, and the speed of the processor for confirming the position of the touched sensing optical fiber is conveniently improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the method is convenient for knowing the approximate position of the intrusion of outside personnel or things into the security area in time;
2. the energy conservation and environmental protection of the optical fiber alarm system based on laser interference are facilitated to be improved;
3. and the operation stability of the optical fiber alarm system based on laser interference is convenient to improve.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an optical fiber alarm system based on laser interferometry in an embodiment of the application.
Reference numerals illustrate: 1. a laser emitting module; 11. a first laser source; 12. a second laser source; 13. an automatic power supply switcher; 14. a mains supply; 15. a green energy source power supply; 16. a standby storage battery; 2. the first break-in judging module; 21. a first beam splitter; 22. an inductive optical fiber; 23. a second beam splitter; 24. a reference optical fiber; 25. a light combiner; 26. an interference judging device; 27. a light input judging unit; 28. a reference light signal judgment unit; 29. an encoder; 210. an identification code analysis unit; 3. the second break-in judging module; 31. a third beam splitter; 32. rechecking the optical fiber; 33. a photoelectric converter; 34. an electrical signal change judging device; 35. an optical fiber identification code generation unit; 4. an intrusion result processing module; 41. a processor; 42. a display; 43. an indoor alarm; 44. an outdoor alarm; 45. a wireless alarm signal transmitting unit; 46. and (5) an intelligent terminal.
Detailed Description
The present application will be described in further detail with reference to fig. 1.
The embodiment of the application discloses an optical fiber alarm system based on laser interference. Referring to fig. 1, the optical fiber alarm system based on laser interference includes a laser emission module 1, where the laser emission module 1 is connected with a first intrusion determination module 2 and a second intrusion determination module 3, and the first intrusion determination module 2 is configured to determine whether an external person or thing intrudes into a boundary of a preset security area according to source laser emitted by the laser emission module 1, and obtain a first intrusion determination result; the second intrusion judging module 3 is configured to judge whether an external person or thing intrudes into a boundary of a preset security area according to the assistance of the source laser sent by the laser sending module 1, and obtain a second intrusion judging result; the first intrusion judging module 2 and the second intrusion judging module 3 are connected together to form an intrusion result processing module 4, and the intrusion result processing module 4 is used for receiving the first intrusion judging result and the second intrusion judging result, determining the approximate position of an external person or thing intrudes into the security area according to the first intrusion judging result and the second intrusion judging result, and processing an intrusion event, so that intelligent patrol and alarm of the perimeter of the security area are realized.
Referring to fig. 1, the laser emission module 1 includes a first laser source 11 and a second laser source 12, and the first laser source 11 and the second laser source 12 are commonly connected with a power automatic switch 13, and the power automatic switch 13 is connected with a mains power supply 14, a green energy power supply 15 and a backup battery 16. Wherein, the first laser source 11 is used for providing the first source laser to the first intrusion judging module 2, and the second laser source 12 is used for providing the second source laser to the second intrusion judging module 3; the automatic power switch 13 is used for automatically switching the connection of the commercial power source 14 or the green energy source 15 or the backup battery 16 to the automatic power switch 13, thereby ensuring the stability of the power supply of the first laser source 11 and the second laser source 12. In practice, the priority of use of the mains supply 14, the green energy supply 15 and the backup battery 16 is ordered as: a green energy source 15, a mains supply 14 and a standby storage battery 16; therefore, on the premise of ensuring the power supply stability, the energy conservation of the optical fiber alarm system based on laser interference is fully improved; it should be noted that the green energy source 15 includes, but is not limited to, a solar energy source, a wind energy source, a geothermal energy source, a water energy source, and a biological energy source.
Referring to fig. 1, the first intrusion determination module 2 includes a first beam splitter 21 connected to the first laser source 11, and a plurality of sensing optical fibers 22 corresponding to a plurality of preset boundary segments of the security area one by one are connected to an output end of the first beam splitter 21; the output end of the first beam splitter 21 is also connected with a second beam splitter 23, the output end of the second beam splitter 23 is connected with a plurality of reference optical fibers 24 corresponding to the sensing optical fibers 22 one by one, each reference optical fiber 24 and the corresponding sensing optical fiber 22 are commonly connected with a beam combiner 25, the beam combiner 25 is used for carrying out beam combination treatment on detection laser transmitted by the sensing optical fiber 22 and reference laser transmitted by the reference optical fiber 24, and each beam combiner 25 is connected with a corresponding interference judging device 26.
Referring to fig. 1, the intrusion result processing module 4 includes a processor 41 wirelessly connected to the interference determiner 26, and a display 42 is electrically connected to the processor 41.
In practice, if an external person or thing breaks into the security area from a certain boundary section of the security area, the sensing optical fiber 22 corresponding to the boundary section is touched, so that the touched portion of the corresponding sensing optical fiber 22 is bent, the sensing optical fiber 22 can cause the phase of the detection laser transmitted in the sensing optical fiber 22 to change in the bending process, so that after the beam combining process of the beam combiner 25, the interference phenomenon is generated after the beam combining process of the detection laser and the reference laser, the interference phenomenon can be judged by the corresponding interference judging device 26, if the interference phenomenon occurs, the corresponding sensing optical fiber 22 is touched, and therefore, the condition that the external person or thing breaks into the security area from the sensing optical fiber 22 is indicated.
In one embodiment, in order to facilitate detecting whether the laser transmission process of the sensing optical fiber 22 and the reference optical fiber 24 connected to the combiner 25 is normal, an optical input determining unit 27 connected to the processor 41 in a wireless communication manner is connected to the combiner 25, and the optical input determining unit 27 is configured to determine whether the corresponding sensing optical fiber 22 and the reference optical fiber 24 transmit corresponding optical signals to the corresponding combiner 25. Specifically, the optical input determining unit 27 is configured to determine whether optical signals exist at two optical signal receiving ports corresponding to the optical combiner 25, the sensing optical fiber 22 and the reference optical fiber 24.
In the judging process: if all the optical signals exist, the laser transmission process of the sensing optical fiber 22 and the reference optical fiber 24 corresponding to the light combiner 25 is normal; if no optical signal exists at the optical signal receiving port corresponding to the sensing optical fiber 22, it is indicated that a problem occurs in the laser transmission process of the sensing optical fiber 22 corresponding to the combiner 25, and at this time, the optical input judging unit 27 immediately sends a corresponding electrical signal to the processor 41, so that the processor 41 can display the position information of the sensing optical fiber 22 with the problem on the display 42 according to the signal at the point; if no optical signal exists at the optical signal receiving port corresponding to the reference optical fiber 24, it is indicated that a problem occurs in the laser transmission process of the reference optical fiber 24 corresponding to the combiner 25, and at this time, the optical input judging unit 27 immediately sends a corresponding electrical signal to the processor 41, so that the processor 41 can display the position information of the reference optical fiber 24 with the problem on the display 42 according to the point signal; if no optical signal exists in the optical signal receiving ports corresponding to the sensing optical fiber 22 and the reference optical fiber 24, it is indicated that problems occur in the laser transmission process of the sensing optical fiber 22 and the reference optical fiber 24 corresponding to the combiner 25, and at this time, the optical input judging unit 27 immediately sends corresponding electrical signals to the processor 41, so that the processor 41 can display the position information of the sensing optical fiber 22 and the reference optical fiber 24, which are in problems, on the display 42 according to the signals at the points; in this manner, a service person facilitates servicing or replacement of the corresponding sensing fiber 22 and/or reference fiber 24 based on the positional information of the sensing fiber 22 and/or reference fiber 24 displayed on the display 42.
In another embodiment, in order to facilitate judging whether the sensing optical fiber 22 connected to the combiner 25 is broken by human damage, a reference optical signal judging unit 28 connected to the processor 41 in wireless communication is connected to the output end of the combiner, and the reference optical signal judging unit 28 is located between the combiner 25 and the interference judging unit 26; the reference optical signal judging unit 28 is for judging whether or not the optical signal emitted therefrom is an optical signal inputted thereto via the reference optical fiber 24 connected thereto.
In the judging process: if the reference optical signal judging unit 28 judges that the optical signal sent by the optical combiner 25 to the interference judging unit 26 is the optical signal transmitted into the optical combiner through the reference optical fiber 24 connected with the optical combiner, it indicates that the sensing optical fiber 22 connected with the optical combiner 25 does not transmit the corresponding optical signal to the optical combiner 25, so that it is convenient to judge that the optical fiber is broken due to factors such as artificial damage; then, the reference optical signal judging unit 28 immediately generates a corresponding electrical signal, and transmits the electrical signal to the processor 41, so that the processor 41 can display the position information of the sensing optical fiber 22 with signal interruption on the display 42 according to the electrical signal, so that security personnel and maintenance personnel can timely arrive at the corresponding area to check the corresponding sensing optical fiber 22, if the sensing optical fiber 22 is manually damaged, alarm information can be timely sent out, and if other reasons lead to a signal terminal, the interrupted sensing optical fiber 22 can be timely maintained and replaced.
In one embodiment, to facilitate the lift processor 41 knowing where the intrusion event occurred, the first intrusion determination module 2 further includes an encoder 29 disposed between each of the interference determination devices 26 and the processor 41.
In implementation, if the interference phenomenon is determined to occur by the interference judger 26, the interference judger 26 transmits the corresponding electric signal to the encoder 29, the encoder 29 adds the identification code corresponding to the position information of the touched sensing optical fiber 22 into the received electric signal, so as to form a code, then the encoder 29 transmits the corresponding code signal to the processor 41, the processor 41 directly analyzes the code to obtain the identification code therein, so that the position information of the touched sensing optical fiber 22 is determined, and the electric signal sent by the interference judger 26 does not need to be processed for a long time to obtain the position information of the touched sensing optical fiber 22; next, the processor 41 displays the position information of the corresponding sensing optical fiber 22 on the display 42, so that the security personnel can go to the corresponding area to patrol according to the position information of the sensing optical fiber 22.
In one embodiment, to facilitate further improving the processor 41 to learn the location where the intrusion event occurs, the first intrusion determination module 2 further includes an identification code analysis unit 210 commonly connected to the plurality of encoders 29, the identification code analysis unit 210 being connected between the encoder 29 and the processor 41; the identification code analysis unit 210 is configured to identify the identification code in the encoded code, and send the identification code signal directly to the processor 41; thus, the processor 41 can directly obtain the position information of the touched sensing optical fiber 22 according to the identification signal after obtaining the identification signal, and then display the position information of the touched sensing optical fiber 22 on the display 42.
Referring to fig. 1, the second intrusion determination module 3 includes a third beam splitter 31 connected to the second laser source 12, where the second laser source 12 is configured to emit rayleigh scattering laser into the third beam splitter 31, and an output end of the third beam splitter 31 is connected with a plurality of reinspection optical fibers 32 corresponding to the sensing optical fibers 22 one by one, where the reinspection optical fibers 32 and the corresponding sensing optical fibers 22 are connected in the same optical cable, so that the reinspection optical fibers 32 and the corresponding sensing optical fibers 22 are arranged side by side; one end of each review optical fiber 32 far away from the third optical splitter 31 is connected with a corresponding photoelectric converter 33, and each photoelectric converter 33 is connected with a corresponding electric signal change judging device 34; the intrusion result processing module 4 further includes an optical fiber identification code generating unit 35 connected to the processor 41, and the optical fiber identification code generating unit 35 is connected to each of the electric signal change judger 34.
In implementation, if an intrusion event occurs in a boundary section of a security area, the corresponding sensing optical fiber 22 is touched, and since the sensing optical fiber 22 and the corresponding reinspection optical fiber 32 are connected in the same optical cable, the reinspection optical fiber 32 is also touched synchronously, so that the rayleigh scattering type laser transmission path in the reinspection optical fiber 32 is changed, the optical signal received by the photoelectric sensor is changed, so that the electric signal converted by the photoelectric sensor is also changed, and the electric signal change judging device 34 can send a corresponding control electric signal to the optical fiber identification code generating unit 35 when the electric signal is changed, so that the optical fiber identification code generating unit 35 generates an optical fiber identification code corresponding to the touched reinspection optical fiber 32 according to the control electric signal, and the optical fiber identification code is used for representing the position information of the corresponding reinspection optical fiber 32; the optical fiber identification code generating unit 35 then sends the generated optical fiber identification code to the processor 41, so that the processing can obtain the position information of the reinspection optical fiber 32 corresponding to the optical fiber identification code directly according to the optical fiber identification code analysis; then, the processor 41 synchronously judges whether it also analyzes the position information of the sensing optical fiber 22 in the same optical cable as the review optical fiber 32; the sensing optical fiber 22 is consistent with the positional information of the review optical fiber 32 arranged in parallel with the sensing optical fiber; if the processor 41 analyzes the position information of a certain sensing optical fiber 22 and analyzes the position information of the reinspection optical fiber 32 which is parallel to the sensing optical fiber 22, the position information of the sensing optical fiber 22 and the reinspection optical fiber 32 is displayed on the display 42, so that the subsequent security personnel can conveniently and timely reach the area corresponding to the position information to patrol; therefore, whether an intrusion event occurs to the boundary of a certain security area can be synchronously judged in two detection modes, and the judgment accuracy is improved.
In one embodiment, in order to facilitate timely notifying security personnel and warning intruders after an intrusion event, the intrusion result processing module 4 further includes an indoor alarm 43 and an outdoor alarm 44 electrically connected to the processor 41, where the indoor alarm 43 is installed in a security office of a security area, and the outdoor alarms 44 are uniformly distributed in the security area.
In practice, if the processor 41 determines that an intrusion event exists, the indoor alarm 43 and the outdoor alarm 44 are immediately started, so that timely notification of security personnel is realized, and warning of an intruder is synchronously realized.
In one embodiment, in order to facilitate timely notification of security personnel in patrol status after an intrusion event; the intrusion result processing module 4 further comprises a wireless alarm signal sending unit 45 connected with the processor 41, and the wireless alarm signal sending unit 45 is connected with an intelligent terminal 46 carried by security personnel in a patrol state in a wireless communication manner.
In implementation, if the processing determines that the intrusion time occurs, the processing further wirelessly transmits the position information of the corresponding sensing optical fiber 22 or the reset optical fiber to each intelligent terminal 46, so that the security personnel in the patrol state can timely arrive at the area where the intrusion event occurs, and further timely process the intrusion event.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. An optical fiber alarm system based on laser interference is characterized in that: the laser device comprises a laser emission module (1), wherein the laser emission module (1) is connected with a first light splitter (21), the first light splitter (21) is connected with a plurality of sensing optical fibers (22) which are in one-to-one correspondence with preset boundary sections of security areas, each sensing optical fiber (22) is connected with a corresponding light combiner (25), the first light splitter (21) is connected with a second light splitter (23), the second light splitter (23) is connected with reference optical fibers (24) which are in one-to-one correspondence with the light combiners (25), and the reference optical fibers (24) are connected with the corresponding light combiners (25); each light combiner (25) is connected with an interference judging device (26), the interference judging device (26) is connected with a processor (41), and the processor (41) is connected with a display (42).
2. The laser interference-based fiber optic alarm system of claim 1, wherein: the laser emission module (1) comprises a first laser source (11), wherein the first laser source (11) is connected with a power automatic switcher (13), and the power automatic switcher (13) is at least connected with a mains supply (14) and a green energy source (15); the automatic power supply switcher (13) is also electrically connected with the interference judging device (26), the processor (41) and the display (42).
3. The laser interference-based fiber optic alarm system of claim 2, wherein: the automatic power supply switcher (13) is connected with a standby storage battery (16).
4. A laser interference based fiber optic alarm system as claimed in claim 3, wherein: the laser emission module (1) comprises a second laser source (12) connected with the automatic power supply switcher (13), the second laser source (12) is connected with a third light splitter (31), the third light splitter (31) is connected with a reinspection optical fiber (32) which corresponds to the sensing optical fibers (22) one by one and is arranged side by side, each reinspection optical fiber (32) is connected with a photoelectric converter (33) in communication connection with the processor (41), the photoelectric converter (33) is connected with an electric signal change judging device (34), and an optical fiber identification code generating unit (35) is connected between the electric signal change judging device (34) and the processor (41).
5. The laser interference-based fiber optic alarm system of claim 1, wherein: the light combiner (25) is connected with a light input judging unit (27), and the light input judging unit (27) is used for judging whether the sensing optical fiber (22) and the reference optical fiber (24) transmit corresponding light signals to the corresponding light combiner (25); the light input judging unit (27) is connected to the processor (41).
6. The laser interference-based fiber optic alarm system of claim 1, wherein: a reference optical signal judging unit (28) is connected between the light combiner (25) and the corresponding interference judging unit (26), and the reference optical signal judging unit (28) is used for judging whether the optical signal sent by the corresponding light combiner (25) is the optical signal input into the light combiner through the corresponding reference optical fiber (24); the reference light signal judging unit (28) is connected with the processor (41), and the processor (41) is connected with an alarm module.
7. The laser interference-based fiber optic alarm system of claim 6, wherein: the alarm module comprises an indoor alarm (43) and/or an outdoor alarm (44) electrically connected with the processor (41).
8. The laser interference-based fiber optic alarm system of claim 7, wherein: the alarm module comprises a wireless alarm signal transmitting unit (45) electrically connected with the processor (41), and the wireless alarm signal transmitting unit (45) is connected with an intelligent terminal (46) in a wireless communication mode.
9. The laser interference-based fiber optic alarm system of claim 1, wherein: an encoder (29) is connected between each interference judging device (26) and the processor (41), the encoder (29) is used for adding an identification code into an electric signal output by the implementation photoelectric converter (33) to obtain a corresponding code, and the code is sent to the processor (41).
10. The laser interference-based fiber optic alarm system of claim 9, wherein: an identification code analysis unit (210) is connected between the encoder (29) and the processor (41), and the identification code analysis unit (210) is used for identifying the identification code in the encoded code and sending the identification code to the processor (41).
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