CN212322378U - Distributed optical fiber alarm host and distributed optical fiber intrusion detection system - Google Patents
Distributed optical fiber alarm host and distributed optical fiber intrusion detection system Download PDFInfo
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- CN212322378U CN212322378U CN202021438857.9U CN202021438857U CN212322378U CN 212322378 U CN212322378 U CN 212322378U CN 202021438857 U CN202021438857 U CN 202021438857U CN 212322378 U CN212322378 U CN 212322378U
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Abstract
The utility model provides a distributed optical fiber alarm host and a distributed optical fiber intrusion detection system, which relate to the intrusion alarm field, wherein the distributed optical fiber alarm host comprises an optical module, a high-speed acquisition card and an industrial personal computer which are connected in pairs; the optical module and the high-speed acquisition card are integrated on the industrial personal computer; the optical module is used for sending an optical pulse signal to the target sensing optical fiber, converting an optical echo signal returned aiming at the optical pulse signal into an analog electric signal and outputting the analog electric signal to the high-speed acquisition card; the high-speed acquisition card is used for carrying out analog-to-digital conversion on the analog electric signal to obtain a digital electric signal and sending the digital electric signal to the industrial personal computer; the industrial personal computer is used for outputting an intrusion alarm signal and/or a fiber breaking fault signal when the digital electric signal is abnormal. The utility model discloses an integrate the optical module and can retrench the structure, can realize distributed long distance through increasing optical module and high-speed acquisition card and survey, be based on the industrial computer structure simultaneously, realized extensible distributing type optic fibre intrusion detection technique.
Description
Technical Field
The utility model belongs to the technical field of the intrusion alert and specifically relates to a distributed optical fiber alarm host computer and distributed optical fiber intrusion detection system are related to.
Background
The distributed optical fiber intrusion detection system can be used for detecting real-time intrusion and destruction behaviors such as knocking, impacting, strong destruction, climbing and the like of fences, brick walls and solid walls, iron fences, petroleum pipelines, power lines and the like. The core of the distributed optical fiber intrusion detection system of the existing distributed optical fiber intrusion detection system is an alarm host which is used for collecting and processing sensing data, however, the light path part of the existing alarm host consists of a narrow-band light source, a signal generator, a multistage amplifier, a multistage filter, a photoelectric coupling module, a conversion module and the like, so that the light path structure is complex, and long-distance detection cannot be carried out.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a distributing type optic fibre alarm host computer and distributing type optic fibre intrusion detection system can simplify the structure through integrating the optical module, can realize distributing type long distance detection through increasing optical module and high-speed collection card, is based on the industrial computer structure simultaneously, has realized extensible distributing type optic fibre intrusion detection technique.
In a first aspect, an embodiment of the present invention provides a distributed optical fiber alarm host, including two optical modules, a high-speed acquisition card and an industrial personal computer, which are connected to each other; the optical module and the high-speed acquisition card are integrated on the industrial personal computer;
the optical module is used for sending an optical pulse signal to a target sensing optical fiber, collecting an optical echo signal returned by the target sensing optical fiber aiming at the optical pulse signal, converting the optical echo signal into an analog electric signal and outputting the analog electric signal to the high-speed acquisition card;
the high-speed acquisition card is used for receiving the analog electric signal output by the optical module, performing analog-to-digital conversion on the analog electric signal to obtain a digital electric signal, and sending the digital electric signal to the industrial personal computer;
and the industrial personal computer is used for outputting an intrusion alarm signal and/or a fiber breaking fault signal when the digital electric signal is abnormal.
In an optional embodiment, the optical module comprises a light source modulation device, an optical signal amplifier and an optical-to-electrical converter which are connected in sequence; the optical signal amplifier is connected with the photoelectric converter through an optical fiber jumper.
In an alternative embodiment, the optical signal amplifier is connected to a target sensing fiber.
In an alternative embodiment, the light source modulation device is an acousto-optic modulator.
In an alternative embodiment, the optical signal amplifier is an erbium doped fiber amplifier.
In an optional embodiment, the high-speed acquisition card is connected with the acousto-optic modulator;
the high-speed acquisition card is also used for outputting optical pulse signals to the acousto-optic modulator so as to drive the acousto-optic modulator to provide an excitation signal source for the erbium-doped fiber amplifier.
In an alternative embodiment, there are two of the light modules; and each optical module is respectively connected with the high-speed acquisition card.
In an optional embodiment, the high-speed acquisition card is a double-layer high-speed acquisition card, and the optical module includes a first optical module and a second optical module; the double-layer high-speed acquisition card is respectively connected with the first optical module and the second optical module; the target sensing optical fiber comprises a main sensing optical fiber and a standby sensing optical fiber; each first optical module is connected with a main sensing optical fiber; and each second optical module is respectively connected with a spare sensing optical fiber.
In an alternative embodiment, the optical module further comprises a phase sensitive optical time domain reflectometer.
In a second aspect, an embodiment of the present invention provides a distributed optical fiber intrusion detection system, where the system includes any one of the foregoing embodiments, the distributed optical fiber alarm host further includes a sensing optical fiber connected to the distributed optical fiber alarm host.
The utility model provides a distributed optical fiber alarm host and a distributed optical fiber intrusion detection system, wherein the distributed optical fiber alarm host comprises an optical module, a high-speed acquisition card and an industrial personal computer which are connected in pairs; the optical module and the high-speed acquisition card are integrated on the industrial personal computer; the optical module is used for sending an optical pulse signal to the target sensing optical fiber, collecting an optical echo signal returned by the target sensing optical fiber aiming at the optical pulse signal, converting the optical echo signal into an analog electric signal and outputting the analog electric signal to the high-speed acquisition card; the high-speed acquisition card is used for receiving the analog electric signal output by the optical module, performing analog-to-digital conversion on the analog electric signal to obtain a digital electric signal, and sending the digital electric signal to the industrial personal computer; the industrial personal computer is used for outputting an intrusion alarm signal and/or a fiber breaking fault signal when the digital electric signal is abnormal. The structure can be simplified by integrating the optical module, distributed long-distance detection can be realized by adding the optical module and a high-speed acquisition card, and an extensible distributed optical fiber intrusion detection technology is realized based on the structure of the industrial personal computer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a distributed optical fiber alarm host provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another distributed optical fiber alarm host provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a specific optical module according to an embodiment of the present invention;
fig. 5 is a system structure diagram of a dual-channel distributed optical fiber alarm host provided by an embodiment of the present invention;
fig. 6 is a system structure diagram of another dual-channel distributed optical fiber alarm host according to an embodiment of the present invention.
Icon: 10-an optical module; 11-a first light module; 12-a second light module; 101-a light source modulation device; 102-optical signal amplifier; 103-a photoelectric converter; 20-high speed collecting card; 30-an industrial personal computer; 40-target sensing fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the position or positional relationship indicated by the term "center" or the like is based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of the present invention is usually placed when in use, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element to be referred must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The existing traditional defense area type optical fiber intrusion alarm system adopts an M-Z interference principle, and the system consists of an alarm host, a guide optical fiber, an initial end module, a terminal module, a sensing optical fiber and the like, wherein the sensing optical fiber has a multi-core structure, the optical path structure is complex, and more optical fiber melting points exist in the initial end module and the terminal module, so that the defects of large fiber melting engineering amount, difficult maintenance and the like exist. And the defense area type optical fiber can not realize accurate positioning, and only can realize the alarm positioning of the whole optical fiber or the whole defense area. The distributed optical fiber intrusion detection system consists of an alarm host and a single-mode single-core optical fiber, and compared with the traditional defense area type optical fiber, the distributed optical fiber intrusion detection system is simple in structure. The distributed Optical fiber intrusion detection system adopts a phase-sensitive Optical Time-Domain reflectometer (phi-OTDR) technology, and improves the interference effect of backward Rayleigh scattering light by using an ultra-narrow band light source on the basis of a backward Rayleigh scattering theory, thereby realizing intrusion detection and accurate positioning. However, the existing distributed optical fiber alarm processing host consists of an optical path part and a circuit part, wherein the optical path part consists of a narrow-band light source, a signal generator, a multi-stage amplifier, a multi-stage filter, a photoelectric coupling module, a conversion module and the like, the structure is complex, and the matching of all the components is difficult to realize accurately. Based on this, the embodiment of the utility model provides a distributed optical fiber alarm host computer and distributed optical fiber intrusion detection system can realize distributed long distance detection through increasing optical module and high-speed collection card through integrating the structure can be retrencied to the optical module, is based on the industrial computer structure simultaneously, has realized extensible distributing type optic fiber intrusion detection technique.
For understanding, first, a detailed description is given to a distributed optical fiber alarm host provided in an embodiment of the present invention, referring to a schematic structural diagram of a distributed optical fiber alarm host as shown in fig. 1, where the distributed optical fiber alarm host includes two optical modules 10, a high-speed acquisition card 20, and an industrial personal computer 30 connected to each other. The optical module 10 and the high-speed acquisition card 20 are integrated on the industrial personal computer 30, that is, the industrial personal computer 30 provides a support structure for the optical module 10 and the high-speed acquisition card 20. Referring to fig. 2, which is a schematic structural diagram of another distributed optical fiber alarm host, an optical module 10 is configured to send an optical pulse signal to a target sensing optical fiber 40, collect an optical echo signal returned by the target sensing optical fiber 40 for the optical pulse signal, convert the optical echo signal into an analog electrical signal, and output the analog electrical signal to a high-speed acquisition card 20. It is understood that the optical pulse signal, i.e. the pulse driving signal in fig. 2, in one embodiment, the optical pulse signal may be a narrow-band optical pulse signal, and the optical pulse signal is sent to the optical module 10 by the high-speed acquisition card 20 and sent to the target sensing optical fiber 40 through the optical module 10. The high-speed acquisition card 20 is configured to receive the analog electrical signal output by the optical module 10, perform analog-to-digital conversion (AD conversion) on the analog electrical signal to obtain a digital electrical signal, and send the digital electrical signal to the industrial personal computer 30, where the industrial personal computer 30 analyzes and processes the digital electrical signal after receiving the digital electrical signal, and outputs an intrusion alarm signal and/or a fiber breakage fault signal when the digital electrical signal is abnormal. For example, when the intrusion is recognized, an intrusion alarm signal is output, and when the returned signal cannot be received and the fiber breakage is determined through analysis processing, a fiber breakage fault signal is output.
The embodiment of the utility model provides a distributed optical fiber alarm host computer, including two liang of optical module, high-speed acquisition card and the industrial computer that link to each other, wherein, optical module and the integrated setting of high-speed acquisition card are on the industrial computer. The optical module is used for sending an optical pulse signal to the target sensing optical fiber, collecting an optical echo signal returned by the target sensing optical fiber aiming at the optical pulse signal, converting the optical echo signal into an analog electrical signal, outputting the analog electrical signal to the high-speed acquisition card, receiving the analog electrical signal output by the optical module by the high-speed acquisition card, performing analog-to-digital conversion on the analog electrical signal to obtain a digital electrical signal, and sending the digital electrical signal to the industrial personal computer; the industrial personal computer is used for outputting an intrusion alarm signal and/or a fiber breaking fault signal when the digital electric signal is abnormal. The structure can be simplified by integrating the optical module, distributed long-distance detection can be realized by adding the optical module and a high-speed acquisition card, and an extensible distributed optical fiber intrusion detection technology is realized based on the structure of the industrial personal computer.
Further, the optical module 10 includes a light source modulation device 101, an optical signal amplifier 102, and an optical-to-electrical converter 103, which are connected in sequence, and the light source modulation device 101, the optical signal amplifier 102, and the optical-to-electrical converter 103 form the optical module 10 in an internal integration manner, see a schematic structural diagram of an optical module shown in fig. 3, where the light source modulation device 101, the optical signal amplifier 102, and the optical-to-electrical converter 103 are connected in sequence, and the optical signal amplifier is connected with the optical-to-electrical converter through an optical fiber jumper. The light source modulation device 101 is configured to receive a pulse driving signal (that is, an optical pulse signal) from the high-speed acquisition card 20, modulate the pulse driving signal, and output the light source signal by the optical signal amplifier 102, where the optical signal amplifier 102 performs multi-stage interconnection amplification and noise suppression processing on the light source signal, so as to improve a signal-to-noise ratio, and output a high-quality output optical path signal to the photoelectric converter 103 through an optical path jumper. The photoelectric converter 103 processes the optical path signal, converts the optical path signal into an electrical signal, and outputs the electrical signal.
In one embodiment, in the internal structure of the optical module 10 provided in fig. 3, the optical signal amplifier 102 may be connected to the target sensing fiber 40, so that the optical signal amplifier 102 processes the optical echo signal returned by the target sensing fiber 40.
In one embodiment, the light source modulation device 101 is an Acousto-optic modulator, such as an Acousto-optic modulator (AOM), the optical signal amplifier 102 can be an Erbium Doped Fiber Amplifier (EDFA), the optical-to-electrical converter 103 can be a PIN optical-to-electrical converter, and other light source modulation devices, optical signal amplifiers and optical-to-electrical converters can be selected according to actual needs in actual applications, which are not limited herein.
In one embodiment, when the AOM of the light source modulation apparatus 101 is an AOM, the high-speed acquisition card 20 is connected to the AOM, and the high-speed acquisition card is further configured to output an optical pulse signal (i.e., an optical pulse signal) to the AOM and drive the AOM to provide an excitation signal source (i.e., the light source signal in fig. 3) for the EDFA. This embodiment also shows a specific structure of an optical module when the light source modulation device 101 is an AOM, the optical signal amplifier 102 is an erbium-doped fiber amplifier EDFA, and the optical-to-electrical converter 103 is a PIN optical-to-electrical converter, which is shown in fig. 4 as a schematic structural diagram of a specific optical module.
In an embodiment, the Optical module 10 further includes a phase-sensitive Optical Time Domain reflectometer, that is, the acousto-optic modulator is an AOM, the erbium-doped fiber amplifier EDFA and the PIN Optical-to-electrical converter are all devices based on a phase-sensitive Optical Time-Domain reflectometer (phi-OTDR) technology, so as to shield multi-stage interconnection amplification, Optical path matching, noise suppression and filtering of an Optical fiber signal.
Considering that the maximum detection distance of the optical module 10 is usually 40-50 km and depends on the light attenuation in the optical fiber link, the optical module can be added in the distributed optical fiber alarm host of the embodiment, so as to increase the detection distance. In an embodiment, two optical modules are arranged to perform double-channel detection, which is shown in fig. 5, and referring to a schematic structural diagram of a dual-channel distributed optical fiber alarm host, where two optical modules 10 are provided, and each optical module 10 is connected to a high-speed acquisition card 20. By performing distributed expansion on the optical module 10, the detection distance can be expanded to 80-100 km. In actual use, the distributed optical fiber alarm host can be placed in the middle of a target sensing optical fiber (or a test optical fiber), and the optical modules 10 of the two channels are respectively connected to the left and right sensing optical fibers with lengths of 40-50 km respectively.
In order to realize double-layer protection monitoring on a single sensing optical fiber link, that is, to realize redundancy protection on the optical fiber sensing link, taking the above-mentioned double-channel distributed optical fiber alarm host as an example, by increasing the number of the optical modules 10 and the high-speed acquisition card 20, double-layer protection monitoring can be realized on a single sensing optical fiber link, and when one sensing optical fiber link is broken, the spare sensing optical fiber link can continue to work, thereby realizing double-layer protection detection. In an embodiment, the high-speed acquisition card may be a double-layer high-speed acquisition card, the optical module 10 includes a first optical module 11 and a second optical module 12, and in practical application, the double-layer high-speed acquisition card is connected to the first optical module 11 and the second optical module 12, and the target sensing optical fiber may include a main sensing optical fiber and a spare sensing optical fiber, see fig. 6, which is a system structure diagram of another two-channel distributed optical fiber alarm host, where the high-speed acquisition card is connected to two first optical modules 11 and two second optical modules 12, each first optical module is connected to the main sensing optical fiber, and each second optical module is connected to the spare sensing optical fiber. Through the mode, when a certain main sensing optical fiber is broken, the standby sensing optical fiber can continue to work, the condition that the optical fiber is broken to cause incapability of working is avoided, the overall working stability of the distributed optical fiber alarm host is further improved, and double-layer link protection detection is realized.
To sum up, the embodiment of the utility model provides a distributed optical fiber alarm host computer, including two liang of optical modules that link to each other, high-speed acquisition card and industrial computer, wherein, optical module and high-speed acquisition card are integrated to be set up on the industrial computer, the optical pulse signal that the high-speed acquisition card was sent is received to the optical module, and send the light pulse signal to target sensing optic fibre, gather the light echo signal that target sensing optic fibre returned to the optical pulse signal, turn into analog signal and export to high-speed acquisition card with the light echo signal, high-speed acquisition card carries out analog-to-digital conversion to analog signal, obtain digital signal, and send digital signal to the industrial computer, the industrial computer carries out analysis processes to digital signal, and export intrusion alarm signal and/or disconnected fine fault signal. The structure can be simplified by integrating the optical module, distributed long-distance detection can be realized by adding the optical module and a high-speed acquisition card, and an extensible distributed optical fiber intrusion detection technology is realized based on the structure of the industrial personal computer.
Based on above-mentioned distributed optical fiber alarm host computer, the embodiment of the utility model provides a distributed optical fiber intrusion detection system, this distributed optical fiber intrusion detection system include the distributed optical fiber alarm host computer of any one of the aforesaid embodiment, still include the sensing optical fiber who is connected with distributed optical fiber alarm host computer. The embodiment of the utility model provides a distributed optical fiber intrusion detection system adopts modular light path components and parts and high-speed collection card, realizes extensible distributed optical fiber intrusion detection system. Compare with current distributed optical fiber intrusion detection system, the embodiment of the utility model provides a distributed optical fiber intrusion detection system through standardized modular structure, has reduced the technical complexity and the debugging degree of difficulty of light path part, has integrate, modularization, extensible characteristics, can support longer detection distance to can realize double-deck detection and redundant protect function in view of the above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A distributed optical fiber alarm host is characterized by comprising optical modules, a high-speed acquisition card and an industrial personal computer which are connected in pairs; the optical module and the high-speed acquisition card are integrated on the industrial personal computer;
the optical module is used for sending an optical pulse signal to a target sensing optical fiber, collecting an optical echo signal returned by the target sensing optical fiber aiming at the optical pulse signal, converting the optical echo signal into an analog electric signal and outputting the analog electric signal to the high-speed acquisition card;
the high-speed acquisition card is used for receiving the analog electric signal output by the optical module, performing analog-to-digital conversion on the analog electric signal to obtain a digital electric signal, and sending the digital electric signal to the industrial personal computer;
and the industrial personal computer is used for outputting an intrusion alarm signal and/or a fiber breaking fault signal when the digital electric signal is abnormal.
2. The distributed optical fiber alarm host of claim 1, wherein the optical module comprises a light source modulation device, an optical signal amplifier and an optical-to-electrical converter which are connected in sequence; the optical signal amplifier is connected with the photoelectric converter through an optical fiber jumper.
3. The distributed fiber optic alarm host of claim 2, wherein the optical signal amplifier is coupled to a target sensing fiber.
4. The distributed fiber optic alarm host of claim 2, wherein said light source modulation device is an acousto-optic modulator.
5. The distributed fiber alarm mainframe of claim 4 wherein the optical signal amplifier is an erbium doped fiber amplifier.
6. The distributed optical fiber alarm host of claim 5, wherein the high-speed acquisition card is connected with the acousto-optic modulator;
the high-speed acquisition card is also used for outputting optical pulse signals to the acousto-optic modulator so as to drive the acousto-optic modulator to provide an excitation signal source for the erbium-doped fiber amplifier.
7. The distributed fiber optic alarm host of claim 1, wherein there are two of the optical modules; and each optical module is respectively connected with the high-speed acquisition card.
8. The distributed optical fiber alarm host of claim 1, wherein the high-speed acquisition card is a double-layer high-speed acquisition card, and the optical module comprises a first optical module and a second optical module; the double-layer high-speed acquisition card is respectively connected with the first optical module and the second optical module; the target sensing optical fiber comprises a main sensing optical fiber and a standby sensing optical fiber; each first optical module is connected with a main sensing optical fiber; and each second optical module is respectively connected with a spare sensing optical fiber.
9. The distributed fiber optic alarm host of claim 1, wherein the optical module further comprises a phase sensitive optical time domain reflectometer.
10. A distributed fibre-optic intrusion detection system comprising a distributed fibre-optic alarm host according to any one of claims 1 to 9, and further comprising sensing fibres connected to the distributed fibre-optic alarm host.
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