CN117805985A - A fence sensing optical cable based on distributed grating array technology - Google Patents

A fence sensing optical cable based on distributed grating array technology Download PDF

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Publication number
CN117805985A
CN117805985A CN202311742471.5A CN202311742471A CN117805985A CN 117805985 A CN117805985 A CN 117805985A CN 202311742471 A CN202311742471 A CN 202311742471A CN 117805985 A CN117805985 A CN 117805985A
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China
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sensing
grating array
fence
optical cable
tensile member
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汤辉
何光辉
宛良强
徐一旻
江山
宋珂
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Wuhan Fengli Photoelectric Technology Co ltd
Wuhan University of Technology WUT
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Wuhan Fengli Photoelectric Technology Co ltd
Wuhan University of Technology WUT
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Priority to CN202311742471.5A priority Critical patent/CN117805985A/en
Publication of CN117805985A publication Critical patent/CN117805985A/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/443Protective covering
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00Prospecting or detecting by optical means
    • G01V8/10Detecting, e.g. by using light barriers
    • G01V8/20Detecting, e.g. by using light barriers using multiple transmitters or receivers
    • G01V8/24Detecting, e.g. by using light barriers using multiple transmitters or receivers using optical fibres
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401Optical cables
    • G02B6/4429Means specially adapted for strengthening or protecting the cables
    • G02B6/4434Central member to take up tensile loads
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00Burglar, theft or intruder alarms
    • G08B13/02Mechanical actuation
    • G08B13/12Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/122Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
    • G08B13/124Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence with the breaking or disturbance being optically detected, e.g. optical fibers in the perimeter fence

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The invention discloses a fence sensing optical cable based on a distributed grating array technology, which belongs to the technical field of safety monitoring and comprises the following components: the optical fiber demodulation device comprises a stress sensing optical unit, an optical cable outer sheath, a first tensile member and a second tensile member, wherein the stress sensing optical unit comprises a packaging tube and a grating array tight-sleeved optical fiber which is arranged along the length direction of the packaging tube and is equal in length, and the grating array tight-sleeved optical fiber is connected with a demodulation instrument; the optical cable outer sheath is provided with a fixing part which is stretched by external force and a sensing part which is connected with the fixing part and deforms along with the stretching of the fixing part, the fixing part is used for being connected with the fence frame through two ends, and the sensing part is wrapped on the stress sensing light unit; the first tensile member and the second tensile member are respectively packaged in the fixed part and the sensing part; the invention can judge whether the man-made invasion is caused, can shield false alarm signals caused by strong wind and animals, can realize all-day and all-weather monitoring, and has very important practical value.

Description

一种基于分布式光栅阵列技术的围栏传感光缆A fence sensing optical cable based on distributed grating array technology

技术领域Technical field

本发明涉及安全监测技术领域,尤其是涉及一种基于分布式光栅阵列技术的围栏传感光缆。The invention relates to the technical field of security monitoring, and in particular to a fence sensing optical cable based on distributed grating array technology.

背景技术Background technique

目前,国内拥有着大量涉及国家机密、民生安全、高经济效益的机构或工程,此机构或工程园区面积一般较大,通过人为巡逻方式变得低效且不安全,因此安装高效、智能安防监测设备或系统变得尤为必要,其作用为感知人为入侵和破坏行为,并进行快速响应、定位、警告和驱逐。At present, there are a large number of institutions or projects in China that involve national secrets, people's livelihood security, and high economic benefits. The area of these institutions or engineering parks is generally large, and manual patrols become inefficient and unsafe. Therefore, efficient and intelligent security monitoring is installed. Equipment or systems have become particularly necessary to detect human intrusions and vandalism and to respond quickly, locate, warn and expel them.

目前主要的解决方案有红外摄像头、振动周界光缆、电子围栏、防区型围栏传感器等。例如,公开号为CN112309061A提供了一种红外围栏,包括控制器、与控制器相连的报警装置和至少两个与控制器相连的红外围栏柱,红外围栏柱包括柱体、多个设于柱体上的红外发射装置以及多个设于柱体上的红外接收装置,红外围栏柱上的红外发射装置向相邻红外围栏柱上的红外接收装置发射红外线,以在两个相邻红外围栏柱之间形成红外光栅。本发明通过红外围栏柱上的红外发射装置向相邻红外围栏柱上的红外接收装置发射红外线,以在两个相邻红外围栏柱之间形成红外光栅,当有人员经过红外光栅时,红外光栅被切断,此时部分红外接收装置无法检测到红外线,控制器控制报警装置发出警报,警告施工区域内的施工人员和误闯施工区域的非施工人员,保证施工现场的安全。At present, the main solutions include infrared cameras, vibrating perimeter optical cables, electronic fences, zone-type fence sensors, etc. For example, the publication number CN112309061A provides an infrared fence, which includes a controller, an alarm device connected to the controller, and at least two infrared fence posts connected to the controller. The infrared fence posts include a column and a plurality of columns located on the column. The infrared transmitting device on the infrared fence column and a plurality of infrared receiving devices arranged on the column. The infrared transmitting device on the infrared fence column emits infrared rays to the infrared receiving device on the adjacent infrared fence column, so as to achieve the goal of transmitting infrared light between the two adjacent infrared fence columns. An infrared grating is formed between them. The invention emits infrared rays through an infrared transmitting device on an infrared fence post to an infrared receiving device on an adjacent infrared fence post to form an infrared grating between two adjacent infrared fence posts. When a person passes by the infrared grating, the infrared grating is cut off. At this time, some infrared receiving devices cannot detect infrared rays. The controller controls the alarm device to sound an alarm to warn construction workers in the construction area and non-construction personnel who accidentally enter the construction area to ensure the safety of the construction site.

在现有技术中,采用红外发射装置和红外接收装置形成红外光栅或采用振动周界光缆等进行监控时,易受暴雨、大雾遮挡的影响,或在受大风、生物侵袭时被误触传感光缆,而触发围栏报警装置发出警报,存在受天气影响、生物侵袭而产生误报等问题。In the prior art, when an infrared transmitting device and an infrared receiving device are used to form an infrared grating or a vibrating perimeter optical cable is used for monitoring, it is easily affected by heavy rain or fog, or the sensor optical cable is accidentally touched during strong winds or biological invasions, thereby triggering the fence alarm device to sound an alarm. There are problems such as false alarms caused by weather influences and biological invasions.

发明内容Contents of the invention

本发明的目的在于克服上述技术不足,提出一种基于分布式光栅阵列技术的围栏传感光缆,解决现有技术中围栏易受暴雨、大雾、遮挡的影响,存在受大风、生物侵袭产生误报等问题的技术问题。The purpose of the present invention is to overcome the above technical deficiencies and propose a fence sensing optical cable based on distributed grating array technology to solve the problem in the existing technology that fences are susceptible to heavy rain, heavy fog, and occlusion, and there are errors caused by strong winds and biological intrusions. technical issues such as reporting.

为达到上述技术目的,本发明的技术方案提供一种基于分布式光栅阵列技术的围栏传感光缆,包括:应力传感光单元、光缆外护套、第一抗拉件以及第二抗拉件,所述应力传感光单元包括封装管以及沿所述封装管的长度方向等长度设置的光栅阵列紧套光纤,所述光栅阵列紧套光纤与解调仪表相连;所述光缆外护套具有用于受外力拉伸的固定部,以及与所述固定部相连并随所述固定部的拉伸而产生形变的传感部,所述固定部用于通过两端连接围栏架,所述传感部包裹于所述应力传感光单元;所述第一抗拉件和所述第二抗拉件分别封装在所述固定部以及所述传感部内。In order to achieve the above technical objectives, the technical solution of the present invention provides a fence sensing optical cable based on distributed grating array technology, including: a stress sensing light unit, an outer sheath of the optical cable, a first tensile member and a second tensile member, The stress sensing light unit includes a packaging tube and a grating array tight-buffered optical fiber arranged at equal lengths along the length direction of the packaging tube. The grating array tight-buffered optical fiber is connected to the demodulation instrument; the outer sheath of the optical cable has a A fixed part that is stretched by an external force, and a sensing part that is connected to the fixed part and deforms as the fixed part is stretched. The fixed part is used to connect the fence frame through both ends, and the sensing part Wrapped in the stress sensing light unit; the first tensile member and the second tensile member are respectively packaged in the fixing part and the sensing part.

在一些实施例中,所述第一抗拉件包括固定钢丝,所述固定钢丝固定在所述光缆外护套的固定部内,并沿所述固定部的长度方向延伸使所述固定钢丝的两端突出或平齐于所述固定部的两端,所述固定钢丝的两端与所述围栏架相连,所述固定钢丝在所述固定部内居中布置,其直径为2.5mm。In some embodiments, the first tensile member includes a fixing steel wire, the fixing steel wire is fixed in the fixing part of the optical cable outer sheath, and extends along the length direction of the fixing part so that both sides of the fixing steel wire The ends protrude or are flush with the two ends of the fixed part, and the two ends of the fixed steel wire are connected to the fence frame. The fixed steel wire is centrally arranged in the fixed part, and its diameter is 2.5mm.

在一些实施例中,所述第二抗拉件包括调节钢丝,所述调节钢丝设置于所述应力传感光单元的侧边,并固定在所述光缆外护套的传感部内,并与所述应力传感光单元相间隔,所述调节钢丝的两端沿所述传感部的长度方向延伸至所述固定部的两端处。所述调节钢丝与所述应力传感光单元并列并且相间隔设置,所述调节钢丝设置有两根,两根所述调节钢丝分别设置在所述应力传感光单元靠近和背离所述光缆外护套的固定部的一侧,其直径为0.5mm。In some embodiments, the second tensile member includes an adjusting steel wire, which is disposed on the side of the stress sensing light unit and fixed in the sensing part of the outer sheath of the optical cable and connected with the The stress sensing light units are spaced apart, and both ends of the adjusting steel wire extend along the length direction of the sensing part to both ends of the fixing part. The adjustment steel wires are arranged side by side and spaced apart from the stress sensing light unit. There are two adjustment steel wires. The two adjustment steel wires are respectively provided near and away from the stress sensing light unit and away from the outer sheath of the optical cable. One side of the fixed part has a diameter of 0.5mm.

在一些实施例中,所述固定部和所述传感部之间的两侧向内凹陷形成一凹陷部,所述凹陷部在长度方向上贯穿所述光缆外护套,所述凹陷部横截面的宽度向远离所述光缆外护套的方向依次递增。In some embodiments, both sides between the fixing part and the sensing part are recessed inward to form a recessed part, the recessed part penetrates the optical cable outer sheath in the length direction, and the recessed part is transversely The width of the cross section gradually increases in a direction away from the outer sheath of the optical cable.

与现有技术相比,本发明的有益效果包括:通过设置的应力传感光单元、光缆外护套、第一抗拉件以及第二抗拉件,固定部能够通过两端横向固定于围栏架上,以感知外界入侵行为产生的拉力,通过将第一抗拉件封装在固定部内,以提高固定部的抗拉性能,防止光缆外护套受拉力形变后损坏;Compared with the prior art, the beneficial effects of the present invention include: through the provided stress sensing light unit, optical cable outer sheath, first tensile member and second tensile member, the fixing part can be laterally fixed to the fence frame through both ends. In order to sense the tensile force generated by external intrusion, the first tensile member is packaged in the fixed part to improve the tensile performance of the fixed part and prevent the outer sheath of the optical cable from being damaged after being deformed by tensile force;

在固定部被拉伸时,传感部会在对应位置产生形变,由于应力传感光单元被包裹在传感部内,使形变产生的应力会传递到围栏传感光缆内部的应力传感光单元从而会引起阵列光栅波长变化,并且,应力传感光单元具有沿所述封装管的长度方向等长度设置的光栅阵列紧套光纤,采用光栅阵列式光纤技术,使光缆外护套外形成多个监测区域,根据对应监测区域产生的阵列光栅波长变化,能够实现对外物入侵的精准定位;When the fixed part is stretched, the sensing part will deform at the corresponding position. Since the stress sensing light unit is wrapped in the sensing part, the stress generated by the deformation will be transmitted to the stress sensing light unit inside the fence sensing optical cable, causing The wavelength of the array grating changes, and the stress sensing light unit has grating array tight-buffered optical fibers arranged at equal lengths along the length of the packaging tube. The grating array optical fiber technology is used to form multiple monitoring areas outside the outer sheath of the optical cable. According to Corresponding to the wavelength changes of the array grating generated in the monitoring area, precise positioning of foreign object intrusion can be achieved;

由于将第二抗拉件封装在传感部内,可以改变传感部在受固定部的拉伸下而产生形变量,提高传感部的抗拉性能,能够将应力传感光单元的形变控制在解调仪表的测量范围内,同时使受天气干扰及其他生物侵袭时,光缆外护套不会产生形变或能够将形变控制在警示范围内,可判定是否人为入侵,能够屏蔽大风、动物引起的误报信号,可以实现能全天时、全天候监测,具有非常重要的实用价值。Since the second tensile member is encapsulated in the sensing part, the amount of deformation of the sensing part when stretched by the fixed part can be changed, the tensile performance of the sensing part can be improved, and the deformation of the stress sensing light unit can be controlled within Within the measurement range of the demodulation instrument, when affected by weather interference and other biological attacks, the outer sheath of the optical cable will not deform or can control the deformation within the warning range. It can determine whether there is human intrusion and can shield the damage caused by strong winds and animals. False alarm signals can be monitored around the clock and around the clock, which has very important practical value.

附图说明Description of drawings

图1是本发明提供的基于分布式光栅阵列技术的围栏传感光缆一实施例的剖面结构示意图;Figure 1 is a schematic cross-sectional structural diagram of an embodiment of a fence sensing optical cable based on distributed grating array technology provided by the present invention;

图2是图1中的基于分布式光栅阵列技术的围栏传感光缆的应力传感光单元的结构示意图;Figure 2 is a schematic structural diagram of the stress sensing light unit of the fence sensing optical cable based on distributed grating array technology in Figure 1;

图3是图1中的基于分布式光栅阵列技术的围栏传感光缆安装时的结构示意图。FIG. 3 is a schematic diagram of the structure of the fence sensor optical cable based on the distributed grating array technology in FIG. 1 during installation.

图中:In the picture:

1、应力传感光单元;11、封装管;12、紧套管;13、光栅阵列光纤;1. stress sensing optical unit; 11. packaging tube; 12. tight casing; 13. grating array optical fiber;

2、光缆外护套;21、固定部;22、传感部;23、凹陷部;2. Outer sheath of optical cable; 21. Fixed part; 22. Sensing part; 23. Recessed part;

3、第一抗拉件;3. The first tensile member;

4、第二抗拉件;5、围栏架;6、围栏传感光缆。4. Second tensile member; 5. Fence frame; 6. Fence sensing optical cable.

具体实施方式Detailed ways

为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

如图1至图3所示,本发明提供了一种基于分布式光栅阵列技术的围栏传感光缆,包括:应力传感光单元1、光缆外护套2、第一抗拉件3以及第二抗拉件4,所述应力传感光单元1包括封装管11以及沿所述封装管11的长度方向等长度设置的光栅阵列紧套光纤,所述光栅阵列紧套光纤与解调仪表相连;所述光缆外护套2具有用于受外力拉伸的固定部21,以及与所述固定部21相连并随所述固定部21的拉伸而产生形变的传感部22,所述固定部21用于通过两端连接围栏架5,所述传感部22包裹于所述应力传感光单元1;所述第一抗拉件3和所述第二抗拉件4分别封装在所述固定部21以及所述传感部22内。As shown in Figures 1 to 3, the present invention provides a fence sensing optical cable based on distributed grating array technology, including: a stress sensing light unit 1, an optical cable outer sheath 2, a first tensile member 3 and a second Tensile member 4, the stress sensing light unit 1 includes a packaging tube 11 and a grating array tight-buffered optical fiber arranged at equal lengths along the length direction of the packaging tube 11, and the grating array tight-buffered optical fiber is connected to a demodulation instrument; The optical cable outer sheath 2 has a fixing part 21 for being stretched by external force, and a sensing part 22 connected to the fixing part 21 and deformed as the fixing part 21 is stretched. The fixing part 21 Used to connect the fence frame 5 through both ends, the sensing part 22 is wrapped in the stress sensing light unit 1; the first tensile member 3 and the second tensile member 4 are respectively packaged in the fixed part 21 and the sensing part 22 .

本方案中,光缆外护套2具有用于受外力拉伸的固定部21,以及与所述固定部21相连并随所述固定部21的拉伸而产生形变的传感部22,实施时,固定部21通过两端横向固定于围栏架5上,以感知外界入侵行为产生的拉力,通过将第一抗拉件3封装在固定部21内,以提高固定部21的抗拉性能,防止光缆外护套2受拉力形变后损坏;在固定部21被拉伸时,传感部22会在对应位置产生形变,由于应力传感光单元1被包裹在传感部22内,使形变产生的应力会传递到围栏传感光缆内部的应力传感光单元1从而会引起阵列光栅波长变化,并且,应力传感光单元1具有沿所述封装管11的长度方向等长度设置的光栅阵列紧套光纤,从而使光缆外护套2外形成多个监测区域,根据对应监测区域产生的阵列光栅波长变化,能够实现对外物入侵的精准定位,由于第二抗拉件4封装在传感部22内,可以改变传感部22在受固定部21的拉伸下而产生形变量,提高传感部22的抗拉性能,将应力传感光单元1的形变控制在解调仪表的测量范围内,同时使受天气干扰及其他生物侵袭时,光缆外护套2不会产生形变或能够将形变控制在警示范围内,以避免产生误报。其结构简单,安装、维护简单,可以实现能全天时、全天候监测。In this solution, the outer sheath 2 of the optical cable has a fixed part 21 for being stretched by external force, and a sensing part 22 connected to the fixed part 21 and deformed as the fixed part 21 is stretched. During implementation, , the fixed part 21 is laterally fixed on the fence frame 5 through both ends to sense the tensile force generated by external intrusion, and the first tensile member 3 is packaged in the fixed part 21 to improve the tensile performance of the fixed part 21 and prevent The optical cable outer sheath 2 is damaged after being deformed by tension; when the fixed part 21 is stretched, the sensing part 22 will deform at the corresponding position. Since the stress sensing light unit 1 is wrapped in the sensing part 22, the deformation will occur. The stress will be transmitted to the stress sensing light unit 1 inside the fence sensing optical cable, which will cause the array grating wavelength to change, and the stress sensing light unit 1 has grating array tight-buffered optical fibers arranged at equal lengths along the length direction of the packaging tube 11. Thereby, multiple monitoring areas are formed outside the outer sheath 2 of the optical cable. According to the wavelength changes of the array grating generated in the corresponding monitoring areas, precise positioning of foreign object intrusion can be achieved. Since the second tensile member 4 is packaged in the sensing part 22, it can Change the deformation amount of the sensing part 22 under the stretching of the fixed part 21, improve the tensile performance of the sensing part 22, control the deformation of the stress sensing light unit 1 within the measurement range of the demodulation instrument, and at the same time make the receiving part When weather interference and other biological attacks occur, the outer sheath 2 of the optical cable will not deform or can control the deformation within the warning range to avoid false alarms. It has a simple structure, simple installation and maintenance, and can realize all-day and all-weather monitoring.

优选地,封装管11为金属螺旋铠管,光栅阵列紧套光纤包括紧套管12以及设置在紧套管12内的光栅阵列光纤13,光栅阵列光纤13为一条完整的光纤,光纤内部等距离设定光栅作为传感器,对其进行特殊封装成缆后,可检测应变或应力变化,其间距可以根据测量精度、解调需求和围栏架间距的参数等各种因素预先确定,能够增加覆盖范围,监测距离长。Preferably, the packaging tube 11 is a metal spiral armored tube, and the grating array tight-buffered optical fiber includes a tight-buffered tube 12 and a grating array optical fiber 13 arranged in the tight-buffered tube 12. The grating array optical fiber 13 is a complete optical fiber, and the inside of the optical fiber is equidistantly spaced. Set the grating as a sensor, and after it is specially packaged into a cable, it can detect strain or stress changes. The spacing can be predetermined based on various factors such as measurement accuracy, demodulation requirements, and fence frame spacing parameters, which can increase the coverage. Long monitoring distance.

具体的,通过解调仪对已敷设的围栏传感光缆内里的光栅进行定位、初始波长标定,当遇到一定外部应力时,光栅将光信号传送到解调仪后,观察解调仪表的输出结果,最后通过观察光谱图将得到的波长和初始波长进行对比和记录。其中,可以对围栏传感光缆产生的形变设置一个形变门限,当小于该形变门限时,认为是外界干扰,而在大于或等于该形变门限时,则认为是有效入侵。通过这种设置门限的方式,可以去除掉防护线缆因风晃动、动物驻停晃动等微小作用力的影响,减少和避免虚警的产生,围栏传感光缆处于形变门限时,应力传感光单元1会产生形变引起阵列光栅波长变化,其表现出波长变化量阈值,可以通过解调仪表进行设定,以便判断是否为人员入侵。Specifically, the grating inside the laid fence sensing optical cable is positioned and initially calibrated using a demodulator. When a certain external stress is encountered, the grating transmits the optical signal to the demodulator and the output of the demodulator is observed. As a result, the obtained wavelength and the initial wavelength are finally compared and recorded by observing the spectrum. Among them, a deformation threshold can be set for the deformation generated by the fence sensing optical cable. When it is less than the deformation threshold, it is considered to be external interference, and when it is greater than or equal to the deformation threshold, it is considered to be an effective intrusion. By setting the threshold in this way, the influence of small forces such as wind swaying and animal parking swaying on the protective cable can be removed, reducing and avoiding the occurrence of false alarms. When the fence sensing optical cable is at the deformation threshold, the stress sensing light unit 1 will produce deformation, causing the wavelength of the array grating to change, which shows a wavelength change threshold, which can be set by the demodulation instrument to determine whether it is a human intrusion.

进一步的,由于光缆外护套2在受拉伸时需要产生形变,因此,在一些可能的实施例中,光缆外护套2材料为LLDPE(线性低密度聚乙烯)材质,其具有硬度高、韧性好、良好的耐温性和耐候性、以及耐撕裂强度等优点。Furthermore, since the optical cable outer sheath 2 needs to deform when being stretched, in some possible embodiments, the optical cable outer sheath 2 is made of LLDPE (linear low-density polyethylene) material, which has high hardness, It has the advantages of good toughness, good temperature resistance and weather resistance, and tear resistance.

第一抗拉件3用于增强固定部21的抗拉性能,在一些可能的实施例中,所述第一抗拉件3包括固定钢丝,其固定在所述光缆外护套2的固定部21内,并沿所述固定部21的长度方向延伸使所述固定钢丝的两端突出或平齐于所述固定部21的两端,两端均与对应的围栏架5固定相连,形成稳定地监测受拉区域。其中,所述固定钢丝在所述固定部21内居中布置。The first tensile member 3 is used to enhance the tensile performance of the fixing part 21. In some possible embodiments, the first tensile member 3 includes a fixing steel wire, which is fixed to the fixing part of the optical cable outer sheath 2. 21, and extend along the length direction of the fixed part 21 so that the two ends of the fixed steel wire protrude or are flush with the two ends of the fixed part 21, and both ends are fixedly connected to the corresponding fence frame 5 to form a stable Monitor the tension area. Wherein, the fixing steel wire is centrally arranged in the fixing part 21 .

具体的,所述固定钢丝为的直径2.5mm的磷化钢丝,其拥有很高的抗拉、抗压性能,光缆敷设时夹持锁紧在钢丝外部的光缆上,能很好的保护光缆被拉伸坏,另外固定光缆夹持在钢丝截面又可避免夹持在光单元敏感区域引起错误信号。Specifically, the fixed steel wire is a phosphated steel wire with a diameter of 2.5 mm, which has high tensile and compressive properties. When the optical cable is laid, it is clamped and locked on the optical cable outside the steel wire, which can well protect the optical cable from being stretched. In addition, the fixed optical cable is clamped in the cross section of the steel wire to avoid being clamped in the sensitive area of the optical unit to cause erroneous signals.

第二抗拉件4能够增强传感部22的抗拉性能,在一些可能的实施例中,所述第二抗拉件4包括调节钢丝,所述调节钢丝设置于所述应力传感光单元1的侧边,并固定在所述光缆外护套2的传感部22内,与所述应力传感光单元1相间隔,所述调节钢丝的两端沿所述传感部22的长度方向延伸至所述固定部21的两端处。The second tensile member 4 can enhance the tensile performance of the sensing part 22. In some possible embodiments, the second tensile member 4 includes an adjustment steel wire, and the adjustment steel wire is provided on the stress sensing light unit 1 and fixed in the sensing part 22 of the optical cable outer sheath 2, spaced apart from the stress sensing light unit 1, and the two ends of the adjusting steel wire extend along the length direction of the sensing part 22 to both ends of the fixed portion 21 .

在本实施例中,所述调节钢丝与所述应力传感光单元1并列并且相间隔设置。所述调节钢丝设置有两根,两根所述调节钢丝分别设置在所述应力传感光单元1靠近和背离所述光缆外护套2的固定部21的一侧,实施时,传感部22位于固定部21正下方,固定部21在上方用于在入侵行为下被拉伸,由于人为入侵会将光缆向下按压,使光缆被按压部分向下产生形变,将两调节钢丝设置在产生形变的方向上,使其具有良好的抗拉保护效果。In this embodiment, the adjustment steel wire and the stress sensing light unit 1 are arranged in parallel and spaced apart. There are two adjusting steel wires, and the two adjusting steel wires are respectively arranged on the side of the stress sensing light unit 1 close to and away from the fixing part 21 of the optical cable outer sheath 2. During implementation, the sensing part 22 Located directly below the fixed part 21, the fixed part 21 is used to be stretched above in case of intrusion. Since artificial intrusion will press the optical cable downward, the pressed part of the optical cable will deform downward. The two adjusting steel wires are set at the position where the deformation occurs. direction, so that it has good tensile protection effect.

具体的,调节钢丝为的直径0.5mm的磷化钢丝,其厚度也可以根据实际监测的环境情况以及报警阈值设定情况等,进行灵活设置,使其具有一定的抗拉保护性能和灵敏度调节性能。Specifically, the adjusting steel wire is a phosphated steel wire with a diameter of 0.5mm. Its thickness can also be flexibly set according to the actual monitored environmental conditions and alarm threshold settings, so that it has certain tensile protection performance and sensitivity adjustment performance. .

在其他可能的实施方式中,位于光缆外护套2内的第一抗拉件3和第二抗拉件4不限于为钢丝,还可以为其他结构件。In other possible implementations, the first tensile member 3 and the second tensile member 4 located in the outer sheath 2 of the optical cable are not limited to steel wires, but may also be other structural members.

在一些可能的实施例中,所述固定部21和所述传感部22之间的两侧向内凹陷形成一凹陷部23,所述凹陷部23在长度方向上贯穿所述光缆外护套2。所述凹陷部23横截面的宽度向远离所述光缆外护套2的方向依次递增,形成三角形截面,如此设置,可以减小固定部21变形对传感部22的影响,从而在一定程度上减少环境、动物等因素的影响,防止发生人为入侵以外的误报情况。In some possible embodiments, the two sides between the fixing portion 21 and the sensing portion 22 are recessed inward to form a recessed portion 23, and the recessed portion 23 passes through the optical cable outer sheath 2 in the length direction. The width of the cross section of the recessed portion 23 increases in sequence in the direction away from the optical cable outer sheath 2 to form a triangular cross section. This arrangement can reduce the influence of the deformation of the fixing portion 21 on the sensing portion 22, thereby reducing the influence of factors such as the environment and animals to a certain extent, and preventing false alarms other than human intrusion.

上述实施例仅为本申请实施例的多种可能的实施方式,本申请实施例并不限于此。The above embodiments are merely multiple possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.

该围栏传感光缆6在安装时,可在围栏架5上沿高度方向依次设置,在本实施例中,围栏传感光缆6设置有三根,围栏架5的中部之间设置一根围栏传感光缆6,围栏架5的顶部之间设置两根并列且间隔的围栏传感光缆6,且顶部围栏传感光缆6位于围栏之上。When the fence sensing optical cables 6 are installed, they can be arranged sequentially on the fence frame 5 along the height direction. In this embodiment, there are three fence sensing optical cables 6 , and one fence sensing optical cable is arranged between the middle parts of the fence frame 5 Two parallel and spaced fence sensing optical cables 6 are arranged between the optical cable 6 and the top of the fence frame 5, and the top fence sensing optical cable 6 is located above the fence.

优选地,本发明中的应力传感光单元1,是基于光栅阵列光纤技术,分布式阵列光栅在光纤涂覆之前将光栅刻入光纤内,相较于传统光纤光栅,光栅阵列光纤13具有无熔接点、可靠性高、生产效率高、制备成本低、复用长度长、易于成缆封装、传感光栅间距小等优点。上述光栅阵列光纤13以紧套光纤的形式放入金属螺旋铠管内部,等距形式注入10~20mm的热熔胶进金属螺旋铠内,固定金属螺旋铠与光栅阵列紧套光纤,成缆过程中将应力传感光单元1拉伸,使光栅阵列紧套光纤受力形成一定程度的拉伸。上述围栏传感光缆经过设定拉伸敷设安装,作为初始的标准参量信号,然后再根据前期大量的实验结果,设定一个判断为人员入侵所表现出的波长变化量值。Preferably, the stress sensing optical unit 1 in the present invention is based on grating array fiber technology. Distributed array grating engraves gratings into the fiber before coating the fiber. Compared with traditional fiber grating, the grating array fiber 13 has the function of no welding. It has the advantages of high reliability, high production efficiency, low preparation cost, long reuse length, easy cable packaging, and small sensing grating spacing. The above-mentioned grating array optical fiber 13 is placed inside the metal spiral armor tube in the form of a tight-buffered optical fiber, and 10~20mm hot melt adhesive is injected into the metal spiral armor at equal intervals to fix the metal spiral armor and the grating array tight-buffered optical fiber. The cable formation process The stress sensing light unit 1 is stretched, so that the grating array tightly packed optical fiber is stressed to form a certain degree of stretching. The above-mentioned fence sensing optical cable is stretched, laid and installed as an initial standard parameter signal, and then based on a large number of previous experimental results, a wavelength change value is set that is judged to be a human intrusion.

本发明通过设置的应力传感光单元1、光缆外护套2、第一抗拉件3以及第二抗拉件4,固定部21能够通过两端横向固定于围栏架5上,以感知外界入侵行为产生的拉力,通过将第一抗拉件3封装在固定部21内,以提高固定部21的抗拉性能,防止光缆外护套2受拉力形变后损坏。在固定部21被拉伸时,传感部22会在对应位置产生形变,由于应力传感光单元1被包裹在传感部22内,使形变产生的应力会传递到围栏传感光缆内部的应力传感光单元1从而会引起阵列光栅波长变化,并且,应力传感光单元1具有沿所述封装管11的长度方向等长度设置的光栅阵列紧套光纤,采用光栅阵列式光纤技术,使光缆外护套2外形成多个监测区域,根据对应监测区域产生的阵列光栅波长变化,能够实现对外物入侵的精准定位。In the present invention, through the stress sensing light unit 1, the optical cable outer sheath 2, the first tensile member 3 and the second tensile member 4, the fixing part 21 can be laterally fixed on the fence frame 5 through both ends to sense external intrusion. The tensile force generated by the fiber optic cable is packaged in the fixing part 21 by the first tensile member 3 to improve the tensile performance of the fixing part 21 and prevent the outer sheath 2 of the optical cable from being damaged after being deformed by the tensile force. When the fixed part 21 is stretched, the sensing part 22 will deform at the corresponding position. Since the stress sensing light unit 1 is wrapped in the sensing part 22, the stress generated by the deformation will be transmitted to the stress inside the fence sensing optical cable. The sensing light unit 1 will cause the array grating wavelength to change, and the stress sensing light unit 1 has grating array tight-buffered optical fibers arranged at equal lengths along the length direction of the packaging tube 11. The grating array optical fiber technology is used to protect the optical cable. Multiple monitoring areas are formed outside the cover 2. According to the wavelength changes of the array grating generated in the corresponding monitoring areas, precise positioning of foreign object intrusion can be achieved.

本发明将第二抗拉件4封装在传感部22内,可以改变传感部22在受固定部21的拉伸下而产生形变量,提高传感部22的抗拉性能,能够将应力传感光单元1的形变控制在解调仪表的测量范围内,同时使受天气干扰及其他生物侵袭时,光缆外护套2不会产生形变或能够将形变控制在警示范围内,可判定是否人为入侵,能够屏蔽大风、动物引起的误报信号,可以实现能全天时、全天候监测,具有非常重要的实用价值。The present invention encapsulates the second tensile member 4 in the sensing part 22, which can change the deformation amount of the sensing part 22 under the stretching of the fixed part 21, improve the tensile performance of the sensing part 22, and can reduce the stress. The deformation of the sensing light unit 1 is controlled within the measurement range of the demodulation instrument. At the same time, when it is disturbed by weather or invaded by other organisms, the outer sheath 2 of the optical cable will not deform or can control the deformation within the warning range, and it can be determined whether it is artificial or not. Intrusion can shield false alarm signals caused by strong winds and animals, and can achieve all-day and all-weather monitoring, which has very important practical value.

在本申请的描述中,需要说明的是,术语“上”和“下”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。除非另有明确的规定和限定,术语“安装”、“相连”和“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体的连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the present application. Unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, It can also be an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

需要说明的是,在本申请中,诸如“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be noted that in this application, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply There is no such actual relationship or sequence between these entities or operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

以上所述本发明的具体实施方式,并不构成对本发明保护范围的限定。任何根据本发明的技术构思所做出的各种其他相应的改变与变形,均应包含在本发明权利要求的保护范围内。The above-described specific embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. Fence sensing optical cable based on distributed grating array technology, characterized by comprising: the stress sensing optical unit, the optical cable outer sheath, the first tensile member and the second tensile member,
the stress sensing light sensing unit comprises a packaging tube and a grating array tight-sleeved optical fiber which is arranged along the length direction of the packaging tube and is equal in length, and the grating array tight-sleeved optical fiber is connected with a demodulation instrument;
the optical cable outer sheath is provided with a fixing part which is stretched by external force and a sensing part which is connected with the fixing part and deforms along with the stretching of the fixing part, the fixing part is used for being connected with a fence frame through two ends, and the sensing part is wrapped in the stress sensing light unit;
the first tensile member and the second tensile member are respectively encapsulated in the fixing portion and the sensing portion.
2. The fence sensing optical cable based on a distributed grating array technology according to claim 1, wherein the first tensile member includes a fixing wire fixed in a fixing portion of the cable jacket and extending in a length direction of the fixing portion such that both ends of the fixing wire protrude or are flush with both ends of the fixing portion, and both ends of the fixing wire are connected to the fence frame.
3. The fence sensing fiber optic cable based on distributed grating array technology of claim 2, wherein the securing wire is centrally disposed within the securing portion.
4. A fence sensing fiber optic cable based on distributed grating array technology as in claim 3, wherein the diameter of the fixed wire is 2.5mm.
5. The fence sensing optical cable based on a distributed grating array technology according to claim 1, wherein the second tensile member includes an adjusting wire disposed at a side of the stress sensing optical unit and fixed in the sensing portion of the cable outer sheath and spaced apart from the stress sensing optical unit, and both ends of the adjusting wire extend to both ends of the fixing portion along a length direction of the sensing portion.
6. The fence sensing fiber optic cable based on distributed grating array technology of claim 5, wherein the tuning wires are juxtaposed and spaced apart from the stress sensing light units.
7. The fence sensing optical cable based on a distributed grating array technology according to claim 6, wherein two adjusting wires are provided, and the two adjusting wires are respectively arranged on one side of the stress sensing light sensing unit, which is close to and away from the fixing part of the optical cable outer sheath.
8. The pen sensing cable based on distributed grating array technology according to claim 7, wherein the diameter of the tuning wire is 0.5mm.
9. The pen sensing cable based on the distributed grating array technology according to claim 1, wherein both sides between the fixing portion and the sensing portion are recessed inward to form a recess portion penetrating through the cable outer sheath in a length direction.
10. The pen sensing cable based on distributed grating array technology according to claim 9, wherein the width of the recess cross section increases sequentially in a direction away from the cable jacket.
CN202311742471.5A 2023-12-18 2023-12-18 A fence sensing optical cable based on distributed grating array technology Pending CN117805985A (en)

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CN117805985A true CN117805985A (en) 2024-04-02

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