CN112288977A - Early warning method and system for precisely-positioned underwater security and protection blocking net - Google Patents
Early warning method and system for precisely-positioned underwater security and protection blocking net Download PDFInfo
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- CN112288977A CN112288977A CN201911096994.0A CN201911096994A CN112288977A CN 112288977 A CN112288977 A CN 112288977A CN 201911096994 A CN201911096994 A CN 201911096994A CN 112288977 A CN112288977 A CN 112288977A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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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
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
- G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
Abstract
The invention relates to an early warning method and an early warning system for an underwater security and protection arresting net, which adopt two optical cables of a warp channel and a weft channel as a distributed disturbance sensor and match with an optical fiber disturbance analyzer to realize the cross positioning and early warning of the warp and the weft of the arresting net, have the function of judging an intrusion behavior, can quickly early warn the intrusion position and the intrusion behavior type when the intrusion behavior occurs, and provide sufficient time for a security department to make an emergency response.
Description
Technical Field
The invention relates to the technical field of underwater security, in particular to an early warning method and an early warning system for an accurately-positioned underwater security barrier net.
Background
The security protection facility for the high-security-level target is an important guarantee for maintaining the stability and the safety of the country, and in order to effectively prevent illegal invasion and malicious damage to the high-security-level target, a physical security protection means is generally adopted to comprehensively protect the target. For high-safety-level targets (such as buildings) on the ground, the adopted security measures are more perfect, and common physical security measures such as building high walls, fence and thorny nets and technical and preventive measures such as video screen monitoring and electronic pulse fences can play an effective security protection role on the ground targets; however, for the security system of underwater high-security level targets (such as aircraft carriers and submarine bases, ports and docks, underwater ammunition material bases, frontline military island reefs, underwater historical historic sites and the like), the system is influenced by the water environment to a great extent, and the effective security protection of the underwater high-security level targets is often difficult to realize.
Aiming at the particularity of the underwater security protection environment, the prior art provides the principle of using optical fibers to be sensitive to micro-vibration to manufacture an underwater security protection monitoring network. However, the prior art does not have a definite structure for weaving the optical fiber cable of the underwater security monitoring network, the optical fiber cannot feed back the accurate vibration generating position in practical application, and meanwhile, the common communication optical cable cannot play a role in blocking illegal invasion because the common communication optical cable does not have enough strength. Another prior art proposes a scheme for manufacturing an underwater security network by using cables, but the disadvantages are obvious: firstly, the cable is easy to be damaged, is soaked in seawater for a long time, has limited service life, is difficult to maintain and has high cost; secondly, the power supply in vast area is difficult, the loss of the cable is large, and the cable is not suitable for large-length or large-range application.
In order to provide an effective security protection effect, the underwater security system must have the effects of intrusion early warning and intrusion blocking at the same time. The protective device only with the blocking effect can only delay the invasion speed, and any blocking can be finally damaged by people to cause the invasion. For the special field of underwater security protection, because a large-area protection area is often faced, if accurate specific information early warning of an intrusion position cannot be provided in time in the process of intrusion occurrence, the intrusion condition is difficult to determine within a limited time, so that the passive situation that the blocking protection of security protection facilities cannot reserve time for security protection departments to make emergency response is caused, illegal intrusion and malicious damage still occur, and a security protection system cannot play a due protection role.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides an early warning method and an early warning system for an accurately positioned underwater security and protection blocking net.
In order to achieve the above purpose, the technical scheme adopted by the invention comprises the following steps:
an accurate positioning type underwater security early warning method comprises the following steps:
A. installing and setting an underwater security and protection arresting net early warning system comprising two optical cables of a warp channel and a weft channel;
B. respectively marking the serial numbers of the optical cable areas of the warp and weft channels, and obtaining the serial number of the longitude and latitude crossing early warning grid area of the arresting net according to the serial numbers of the optical cable areas of the warp and weft channels;
C. setting an optical fiber disturbance information reference value and an alarm value of a position represented by each grid area number of the arresting net;
D. and when detecting that the optical fiber disturbance information at a certain position exceeds an alarm value, sending alarm information aiming at the grid area number of the position to the monitoring terminal.
Further, the method comprises the following optional steps:
E. the underwater security and protection arresting net early warning system is also provided with an optical fiber camera and an optical fiber hydrophone array, and image information and underwater sound information of the position sending the warning information are collected and stored.
Further, the step A comprises the following substeps:
a1, arranging an underwater early warning arresting net comprising two optical cables of a warp channel and a weft channel around a target needing security protection, or additionally installing the two optical cables of the warp channel and the weft channel on the existing arresting net along the warp and the weft of the original arresting net according to the early warning precision; the two optical cables of the warp and weft channels are uniformly arranged on the arresting net at intervals according to the requirement of early warning precision to form uniformly distributed longitude and latitude crossed early warning grids;
a2, respectively connecting a channel optical fiber signal transmission end in a channel optical cable and a weft channel optical fiber signal transmission end in a weft channel optical cable with an optical fiber disturbance information analyzer to ensure that optical fiber disturbance information can be normally transmitted, and forming a channel and weft channel optical fiber disturbance information transmission loop;
further, the step B comprises the following substeps:
b1, arranging the channel-passing optical cables according to the arrangement of the channel-passing optical cables in sequence, wherein the area number X of the channel-passing optical cables is 1-m; sequentially arranging weft channel optical cables according to the arrangement of the weft channel optical cables, wherein the number Y of weft channel optical cable areas is 1-n;
and B2, obtaining the longitude and latitude crossing early warning grid area number X-Y according to the format combination of the front weft channel and the rear weft channel through the channel.
Further, the step C comprises the following substeps:
c1, recording optical fiber disturbance information generated due to natural reasons for the arresting net early warning system which is installed in place, and establishing an optical fiber disturbance information reference value corresponding to the number position of each longitude and latitude crossing early warning grid area of the arresting net according to the optical fiber disturbance information reference value; the optical fiber disturbance information generated due to natural reasons comprises the shaking of the arresting net caused by sea wave and ocean current scouring and the disturbance born by the arresting net in a normal state after the arresting net is installed in place;
c2, respectively setting optical fiber disturbance information alarm values corresponding to the number positions of the longitude and latitude cross early warning grid areas of the arresting net according to security protection requirements and the arresting net optical fiber disturbance information reference values; the optical fiber disturbance information alarm value is greater than or equal to an optical fiber disturbance information reference value of the same grid area number position of the arresting net;
c3, marking special condition prompts according to the characteristics of optical fiber disturbance information generated by the vibration influence on the arresting net caused by special conditions; the special conditions include natural disasters such as tsunamis and earthquakes, vessel movement and anchorage, seabed and sea surface construction;
c4, marking high-risk condition early warning according to the optical fiber disturbance information characteristics generated by the influence of the high-risk condition on the arresting net; the high-risk condition comprises artificial cutting of the optical cable of the blocking net, direct impact of a power machine on the blocking net, artificial tearing of the optical cable of the blocking net and the blocking net.
Further, the step D comprises the following substeps:
d1, when detecting that the arresting net corresponding to the number position of a certain grid area generates optical fiber disturbance information exceeding the alarm value of the number position of the grid area, sending early warning information aiming at the arresting net at the number position of the grid area to the monitoring terminal;
d2, when detecting that the arresting net corresponding to the number position of a certain grid area generates optical fiber disturbance information corresponding to the marked special condition, sending special condition prompt information aiming at the arresting net at the number position of the grid area to the monitoring terminal and noting the content of the special condition possibly generated at the position of the arresting net;
d3, when detecting that the arresting net corresponding to the number position of a certain grid area generates the optical fiber disturbance information corresponding to the marked high-risk condition, sending the high-risk condition early warning information aiming at the arresting net at the number position of the grid area to the monitoring terminal and noting the high-risk condition content which may occur at the position of the arresting net.
An accurate positioning type underwater security early warning system comprises an underwater arresting net module, a field monitoring module and a safety monitoring early warning module;
the underwater arresting net module comprises an arresting net provided with a warp optical cable and a weft optical cable, a reinforced rubber sheet fixed at the junction of the warp optical cable and the weft optical cable of the arresting net and a frame for fixing four edges of the arresting net; the arresting net provided with the warp and weft optical cables is formed by additionally arranging the warp and weft optical cables along the warp and weft of the original arresting net on the arresting net with proper grid density according to the required early warning precision, or is formed by directly weaving the warp and weft optical cables and a steel rope together and has the required early warning precision and the proper grid density;
the field monitoring module comprises an optical fiber disturbance information analyzer, an equipment database and a field communication server; the optical fiber disturbance information analyzer is connected with two groups of optical fibers in a warp optical cable and a weft optical cable of the underwater arresting network module and respectively sends pulse light to the two groups of optical fibers, and simultaneously respectively receives backward Rayleigh scattering light generated by the two groups of optical fibers and restores the received backward Rayleigh scattering light into optical fiber disturbance information, wherein the optical fiber disturbance information comprises the amplitude and frequency of optical fiber vibration and the position of vibration, and the position corresponds to the optical cable area number X, Y of the warp optical cable and the weft optical cable of the arresting network; the equipment database respectively stores optical fiber disturbance information of different positions of the arresting net according to the grid area number of the arresting net; the field communication server transmits the optical fiber disturbance information to the safety monitoring and early warning module in a wired and/or wireless mode;
the safety monitoring and early warning module comprises a remote communication server, a monitoring host and a plurality of monitoring terminals; the remote communication server receives the optical fiber disturbance information from the field monitoring module and transmits the optical fiber disturbance information to the monitoring host; the monitoring host sends the relevant optical fiber disturbance information to the monitoring terminals according to the preset information requirements of the monitoring terminals and the application of monitoring terminal users; the monitoring terminal comprises a computer, mobile equipment and a network data access interface.
Furthermore, the underwater arresting net module also comprises an optical fiber camera and an optical fiber hydrophone array which are arranged on the arresting net; the image information shot by the optical fiber camera and the underwater sound information collected by the optical fiber hydrophone array are transmitted to the on-site monitoring module through optical fibers and further transmitted to the safety monitoring and early warning module in a wired and/or wireless mode.
Further, the optical fiber is connected with a remote communication optical cable, and the optical fiber disturbance information is transmitted to the remote detection equipment through the remote communication optical cable; the remote communication optical cable comprises an existing submarine communication optical cable or an independently arranged communication optical cable or a special communication optical cable specially used for an underwater security and protection barrage system.
Furthermore, the optical fiber disturbance information analyzer comprises a warp channel, a weft channel, two groups of analysis loops and an information processing host; the analysis loop comprises a narrow linewidth laser, an acousto-optic modulator, an erbium-doped fiber amplifier, a circulator, a photoelectric detector and a data acquisition card; the narrow-linewidth laser outputs continuous laser light waves which are converted into pulse light through the acousto-optic modulator, the pulse light is amplified in light intensity by the erbium-doped fiber amplifier and then is input into the arresting network fiber connected with the analyzer through the circulator, backward Rayleigh scattered light generated by fiber disturbance is received by the photoelectric detector through the circulator, and light intensity signals are collected through the data acquisition card; the information processing host obtains the optical fiber disturbance information of the group of loops by analyzing the light intensity signals of backward Rayleigh scattering light generated by the disturbance of each group of optical fibers, and obtains the disturbance information corresponding to the specific position of the arresting net by combining the optical fiber disturbance information of the two groups of loops.
The invention has the beneficial effects that:
the early warning method of the precisely positioned underwater security barrier net is used for early warning and protection of underwater high-security level targets, and intrusion information is positioned in a crossed mode through the optical fiber disturbance information of the two optical cables of the warp channel and the weft channel, so that accurate early warning information including intrusion positions, intrusion forms and the like can be provided in time while intrusion behaviors are effectively delayed, sufficient emergency response time is provided for relevant departments, and a sufficient early warning effect of security protection is achieved. The early warning method can be implemented by additionally arranging two optical cables of the warp channel and the weft channel on the existing arresting net, and can also be woven by additionally arranging two optical cables of the warp channel and the weft channel in the manufacturing process of the arresting net, and the implementation method is flexible and convenient to use and maintain. The two optical cables of the warp and weft channels are used as distributed disturbance sensors, and the disturbance information generated by the abnormal condition of the arresting net can be effectively detected by the arresting net without additional power supply; the high-sensitivity optical fiber disturbance signal analyzer can judge the specific sound production position, amplitude and frequency of disturbance according to backward Rayleigh scattering light generated by the optical fiber, so that the nature of an event can be accurately judged and early warning information can be sent out in a targeted manner. The arresting network system can also be provided with an underwater video linkage optical fiber camera and an optical fiber hydrophone array, records images and underwater acoustic signals according to optical fiber disturbance information, and provides a rechecking judgment basis for detected abnormal conditions.
Drawings
Fig. 1 is a schematic structural view of an underwater security and protection barrage system of the present invention.
Fig. 2 is a schematic view of a barrier net according to an embodiment of the invention.
Fig. 3 is a schematic view of another embodiment of a barrier net of the present invention.
Fig. 4 is a schematic diagram of two optical cable structures of a warp channel and a weft channel and the number of a longitude and latitude crossing early warning grid area in one embodiment of the invention.
FIG. 5 is a schematic diagram of the working flow of the optical fiber disturbance information analyzer of the present invention.
Description of the figure numbering: 11-a barrier net, 111-a steel rope, 112-an enhanced film, 113-a channel optical cable, 1131-a channel optical fiber signal transmission end, 114-a weft channel optical cable, 1141-a weft channel optical fiber signal transmission end, 115-a frame, 12-a fiber optic camera, 13-a fiber optic hydrophone array, 21-an optical fiber disturbance information analyzer, 22-an equipment database, 23-a field communication server, 31-a remote communication server, 32-a monitoring host computer and 33-a monitoring terminal.
Detailed Description
For a clearer understanding of the contents of the present invention, reference will be made to the accompanying drawings and examples.
As shown in fig. 1, the underwater security and protection barrage system of the present invention is schematically configured, and the system is composed of an underwater barrage module, an on-site monitoring module and a security and monitoring and early warning module, wherein the underwater barrage module includes a barrage net 11, an optical fiber camera 12 and an optical fiber hydrophone array 13, the on-site monitoring module includes an optical fiber disturbance information analyzer 21, an equipment database 22 and an on-site communication server 23, and the security and monitoring and early warning module includes a remote communication server 31, a monitoring host 32 and a plurality of monitoring terminals 33. An embodiment of the barrier net 11, in which two optical cables of a warp channel and a weft channel are additionally installed on an original barrier net, is shown in fig. 2, and includes an original barrier net composed of a steel rope 111, a reinforced rubber sheet 112, and a frame 115, and a channel optical cable 113 and a weft channel optical cable 114 which are additionally installed on the original barrier net, and a channel optical fiber signal transmission end 1131 and a weft channel optical fiber signal transmission end 1141 of the channel optical cable are respectively connected to an optical fiber disturbance information analyzer to form a dual-channel optical fiber disturbance information transmission loop; in this embodiment, the interception density of the arresting net is determined by the grid density of the original arresting net, the early warning accuracy of the arresting net is determined by two additionally installed optical cables in the warp and weft channels, as shown in fig. 2, the early warning accuracy is equal to the grid density of the arresting net, that is, the early warning accuracy is equal to the interception density. Fig. 3 is a schematic diagram of another embodiment of the arresting net 11, which is woven by a steel rope and two optical cables of a warp channel and a weft channel, including a steel rope 111, a reinforced rubber sheet 112, a frame 115, and a channel optical cable 113 and a weft channel optical cable 114, wherein the channel optical fiber signal transmission end 1131 of the channel optical cable and the weft channel optical fiber signal transmission end 1141 of the weft channel optical cable are respectively connected to an optical fiber disturbance information analyzer to form a dual-channel optical fiber disturbance information transmission loop; in this embodiment, the interception density of the arresting net is determined by the grid density woven by the steel rope and the two optical cables of the warp and weft channels, and the early warning accuracy of the arresting net is determined by the two optical cables of the warp and weft channels, as shown in fig. 3, the early warning accuracy is smaller than the grid density of the arresting net, that is, the early warning accuracy is smaller than the interception density.
As shown in fig. 4, the structure and the number of the two optical cables of the warp and weft channels are simultaneously suitable for two situations that the original arresting net shown in fig. 2 is additionally provided with two optical cables and the arresting net is woven by adopting a steel rope and the two optical cables of the warp and weft channels as shown in fig. 3, namely the arresting net comprises a warp channel optical cable 113 and a weft channel optical cable 114, the warp channel optical cable is arranged back and forth along the warp direction of the arresting net and the weft channel optical cable is arranged along the weft direction of the arresting net at regular intervals, and the regular intersection of the warp and weft optical cables forms the early warning grid; the specific arrangement mode is that the optical cable of the channel is laid from the bottom edge of the frame of the arresting net along the warp to extend for a fixed interval a along the top edge of the frame, then laid along the warp to the bottom edge of the frame and then extended for a fixed interval a along the bottom edge of the frame, and the optical cable of the channel is laid to cover the whole arresting net in a reciprocating arrangement mode in such a way, and the optical cable of the channel is laid to the other side edge along the weft in a reciprocating arrangement mode and then returns for a fixed interval b, and the whole arresting net is laid in a reciprocating arrangement mode, and the set size of the fixed intervals; the area number X of the optical cable passing through the channel is set to be 1 to m (m is 4 in the embodiment shown in FIG. 4) according to the arrangement of the optical cable passing through the channel, the area number Y of the optical cable passing through the weft channel is set to be 1 to n (n is 4 in the embodiment shown in FIG. 4) according to the arrangement of the optical cable passing through the weft channel, and the area number X-Y of the longitude and latitude crossing early warning grid is obtained according to the format combination of the front weft channel and the rear weft channel passing through the channel. For example, if optical fiber disturbance information occurs at the position of the point a marked in fig. 4, the number X of the area of the optical cable fed back through the channel optical cable is 4, the number Y of the area of the optical cable fed back through the weft channel optical cable is 1, and the actually obtained number of the grid area of the longitude and latitude cross early warning grid is 4-1, that is, the number of the unique grid area at the position of the point a on the arresting net is 4-1.
When security protection is carried out on underwater high-security-level targets, firstly, a blocking net with a warp channel optical fiber signal transmission end and a weft channel optical fiber signal transmission end on the warp channel optical fiber signal transmission end and the weft channel optical fiber signal transmission end on the weft channel optical fiber signal transmission end are respectively connected with an optical fiber disturbance information analyzer around the target needing security protection, so that optical fiber disturbance information can be normally transmitted to form a double-channel transmission loop; and marking the longitude and latitude crossing early warning grid area number according to the actual arrangement positions of the two optical cables of the warp and weft channels of the blocking net and the use area so as to determine the actual occurrence position of the light disturbance information. After the arrangement of the arresting net is completed, setting the reference value and the alarm value of the optical fiber disturbance information at each position of the arresting net according to the optical fiber disturbance information obtained by the optical fiber disturbance information analyzer; the working flow of the optical fiber disturbance analyzer is as shown in fig. 5, a narrow-linewidth laser device is respectively arranged on the channel analysis loop and the weft channel analysis loop to output continuous laser light waves which are converted into pulse light through an acousto-optic modulator, the pulse light is amplified in light intensity by an erbium-doped optical fiber amplifier and then is input into the arresting network optical fiber connected with the analyzer through a circulator, backward rayleigh scattered light generated by optical fiber disturbance is received by a photoelectric detector through the circulator and is collected by a data acquisition card to obtain light intensity signals of two channels of warp and weft, and the information processing host obtains optical fiber disturbance information through analyzing the backward rayleigh scattered light intensity signals generated by the optical fiber disturbance in the two optical cables of warp. Setting the reference value and the alarm value of the optical fiber disturbance information at each position according to the actual environment and security and protection requirements, recording the optical fiber disturbance information generated by natural reasons (such as the shaking of the arresting net caused by sea wave and ocean current scouring and the stress borne by the arresting net in a normal state after the arresting net is installed in place), and establishing the reference value of the optical fiber disturbance information at each position of the arresting net according to the optical fiber disturbance information; respectively setting optical fiber disturbance information alarm values of all positions of the arresting net according to security and protection requirements and optical fiber disturbance information reference values of all positions of the arresting net, wherein the optical fiber disturbance information alarm values are more than or equal to the optical fiber disturbance information reference values of the same grid area number positions of the arresting net; marking special condition prompts according to optical fiber disturbance information characteristics generated by stress influence on the arresting net caused by special conditions (such as natural disasters, ship movement and anchorage, and seabed and sea surface construction); marking high-risk condition early warning according to optical fiber disturbance information characteristics generated by stress influence on the arresting net caused by high-risk conditions (the arresting net optical cable is artificially sheared, the outer protective layer of the arresting net is artificially stripped, a power machine directly collides with the arresting net, the arresting net optical cable is artificially pulled, and the openings of the arresting net are expanded due to the buckling of the arresting net warp and weft boundary nets). When the system detects that the optical fiber disturbance information fed back by the blocking net at a certain position exceeds an alarm value and/or meets a pre-labeled special condition or high-risk condition, the system sends early warning information aiming at the blocking net at the numbered position of the grid area and/or special condition content and high-risk condition content which possibly occur at the position of the blocking net to the monitoring terminal. When the related personnel receive the early warning information, emergency response can be immediately made according to the position, amplitude and frequency of the optical fiber disturbance information provided by the early warning information; when the system is provided with an underwater optical fiber camera and an optical fiber hydrophone array, image information and underwater sound information of a position where alarm information is sent out are collected and stored for rechecking and judgment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An accurate positioning type underwater security early warning method comprises the following steps:
A. installing and setting an underwater security and protection arresting net early warning system comprising two optical cables of a warp channel and a weft channel;
B. respectively marking the serial numbers of the optical cable areas of the warp and weft channels, and obtaining the serial number of the longitude and latitude crossing early warning grid area of the arresting net according to the serial numbers of the optical cable areas of the warp and weft channels;
C. setting an optical fiber disturbance information reference value and an alarm value of a position represented by each grid area number of the arresting net;
D. and when detecting that the optical fiber disturbance information at a certain position exceeds an alarm value, sending alarm information aiming at the grid area number of the position to the monitoring terminal.
2. The method of claim 1, further comprising the optional step of:
E. the underwater security and protection arresting net early warning system is also provided with an optical fiber camera and an optical fiber hydrophone array, and image information and underwater sound information of the position sending the warning information are collected and stored.
3. The method of claim 1, wherein step a comprises the substeps of:
a1, arranging an underwater early warning arresting net comprising two optical cables of a warp channel and a weft channel around a target needing security protection, or additionally installing the two optical cables of the warp channel and the weft channel on the existing arresting net along the warp and the weft of the original arresting net according to the early warning precision; the two optical cables of the warp and weft channels are uniformly arranged on the arresting net at intervals according to the requirement of early warning precision to form uniformly distributed longitude and latitude crossed early warning grids;
a2, respectively connecting the channel optical fiber signal transmission end in the channel optical cable and the weft channel optical fiber signal transmission end in the weft channel optical cable with an optical fiber disturbance information analyzer, ensuring that optical fiber disturbance information can be normally transmitted, and forming a channel and weft channel optical fiber disturbance information transmission loop.
4. The method of claim 1, wherein step B comprises the substeps of:
b1, arranging the channel-passing optical cables according to the arrangement of the channel-passing optical cables in sequence, wherein the area number X of the channel-passing optical cables is 1-m; sequentially arranging weft channel optical cables according to the arrangement of the weft channel optical cables, wherein the number Y of weft channel optical cable areas is 1-n;
and B2, obtaining the longitude and latitude crossing early warning grid area number X-Y according to the format combination of the front weft channel and the rear weft channel through the channel.
5. The method of claim 1, wherein said step C comprises the substeps of:
c1, recording optical fiber disturbance information generated due to natural reasons for the arresting net early warning system which is installed in place, and establishing an optical fiber disturbance information reference value corresponding to the number position of each longitude and latitude crossing early warning grid area of the arresting net according to the optical fiber disturbance information reference value; the optical fiber disturbance information generated due to natural reasons comprises the shaking of the arresting net caused by sea wave and ocean current scouring and the disturbance born by the arresting net in a normal state after the arresting net is installed in place;
c2, respectively setting optical fiber disturbance information alarm values corresponding to the number positions of the longitude and latitude cross early warning grid areas of the arresting net according to security protection requirements and the arresting net optical fiber disturbance information reference values; the optical fiber disturbance information alarm value is greater than or equal to an optical fiber disturbance information reference value of the same grid area number position of the arresting net;
c3, marking special condition prompts according to the characteristics of optical fiber disturbance information generated by the vibration influence on the arresting net caused by special conditions; the special conditions include natural disasters such as tsunamis and earthquakes, vessel movement and anchorage, seabed and sea surface construction;
c4, marking high-risk condition early warning according to the optical fiber disturbance information characteristics generated by the influence of the high-risk condition on the arresting net; the high-risk condition comprises artificial cutting of the optical cable of the blocking net, direct impact of a power machine on the blocking net, artificial tearing of the optical cable of the blocking net and the blocking net.
6. The method of claim 1, wherein said step D comprises the substeps of:
d1, when detecting that the arresting net corresponding to the number position of a certain grid area generates optical fiber disturbance information exceeding the alarm value of the number position of the grid area, sending early warning information aiming at the arresting net at the number position of the grid area to the monitoring terminal;
d2, when detecting that the arresting net corresponding to the number position of a certain grid area generates optical fiber disturbance information corresponding to the marked special condition, sending special condition prompt information aiming at the arresting net at the number position of the grid area to the monitoring terminal and noting the content of the special condition possibly generated at the position of the arresting net;
d3, when detecting that the arresting net corresponding to the number position of a certain grid area generates the optical fiber disturbance information corresponding to the marked high-risk condition, sending the high-risk condition early warning information aiming at the arresting net at the number position of the grid area to the monitoring terminal and noting the high-risk condition content which may occur at the position of the arresting net.
7. An accurate positioning type underwater security early warning system comprises an underwater arresting net module, a field monitoring module and a safety monitoring early warning module;
the underwater arresting net module comprises an arresting net provided with a warp optical cable and a weft optical cable, a reinforced rubber sheet fixed at the junction of the warp optical cable and the weft optical cable of the arresting net and a frame for fixing four edges of the arresting net; the arresting net provided with the warp and weft optical cables is formed by additionally arranging the warp and weft optical cables along the warp and weft of the original arresting net on the arresting net with proper grid density according to the required early warning precision, or is formed by directly weaving the warp and weft optical cables and a steel rope together and has the required early warning precision and the proper grid density;
the field monitoring module comprises an optical fiber disturbance information analyzer, an equipment database and a field communication server; the optical fiber disturbance information analyzer is connected with two groups of optical fibers in a warp optical cable and a weft optical cable of the underwater arresting network module and respectively sends pulse light to the two groups of optical fibers, and simultaneously respectively receives backward Rayleigh scattering light generated by the two groups of optical fibers and restores the received backward Rayleigh scattering light into optical fiber disturbance information, wherein the optical fiber disturbance information comprises the amplitude and frequency of optical fiber vibration and the position of vibration, and the position corresponds to the optical cable area number X, Y of the warp optical cable and the weft optical cable of the arresting network; the equipment database respectively stores optical fiber disturbance information of different positions of the arresting net according to the grid area number of the arresting net; the field communication server transmits the optical fiber disturbance information to the safety monitoring and early warning module in a wired and/or wireless mode;
the safety monitoring and early warning module comprises a remote communication server, a monitoring host and a plurality of monitoring terminals; the remote communication server receives the optical fiber disturbance information from the field monitoring module and transmits the optical fiber disturbance information to the monitoring host; the monitoring host sends the relevant optical fiber disturbance information to the monitoring terminals according to the preset information requirements of the monitoring terminals and the application of monitoring terminal users; the monitoring terminal comprises a computer, mobile equipment and a network data access interface.
8. The system of claim 7, wherein the underwater arresting net module further comprises a fiber optic camera and fiber optic hydrophone array disposed on the arresting net; the image information shot by the optical fiber camera and the underwater sound information collected by the optical fiber hydrophone array are transmitted to the on-site monitoring module through optical fibers and further transmitted to the safety monitoring and early warning module in a wired and/or wireless mode.
9. The system of claim 7, wherein the optical fiber is coupled to a telecommunication cable through which the optical fiber disturbance information is transmitted to the remote sensing device; the remote communication optical cable comprises an existing submarine communication optical cable or an independently arranged communication optical cable or a special communication optical cable specially used for an underwater security and protection barrage system.
10. The system of claim 7, wherein the optical fiber disturbance information analyzer comprises two groups of analysis loops of a warp channel and a weft channel and an information processing host; the analysis loop comprises a narrow linewidth laser, an acousto-optic modulator, an erbium-doped fiber amplifier, a circulator, a photoelectric detector and a data acquisition card; the narrow-linewidth laser outputs continuous laser light waves which are converted into pulse light through the acousto-optic modulator, the pulse light is amplified in light intensity by the erbium-doped fiber amplifier and then is input into the arresting network fiber connected with the analyzer through the circulator, backward Rayleigh scattered light generated by fiber disturbance is received by the photoelectric detector through the circulator, and light intensity signals are collected through the data acquisition card; the information processing host obtains the optical fiber disturbance information of the group of loops by analyzing the light intensity signals of backward Rayleigh scattering light generated by the disturbance of each group of optical fibers, and obtains the disturbance information corresponding to the specific position of the arresting net by combining the optical fiber disturbance information of the two groups of loops.
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