Force and vibration integrated monitoring equipment

Abstract

The utility model discloses force and vibration integrated monitoring equipment, which comprises a monitoring fence and a monitoring host, and is characterized in that the monitoring fence comprises a force and vibration sensing unit and a fence main body, the force and vibration sensing unit comprises a weak fiber grating and a plurality of stress sensors, and the fence main body comprises a vibration monitoring main body and a stress monitoring main body; the vibration monitoring main body is arranged below the stress monitoring main body, the weak fiber bragg grating is arranged on the vibration monitoring main body, and the plurality of stress sensors are respectively fixed on the stress monitoring main body; the weak fiber bragg grating is connected with the monitoring host after sequentially penetrating through the plurality of stress sensors; the force vibration sensing unit is used for sensing an intrusion behavior, converting the intrusion behavior into an optical signal and inputting the optical signal into the monitoring host; the monitoring host is used for demodulating optical signals and monitoring intrusion behaviors. According to the invention, the accuracy of perimeter security and protection monitoring can be effectively improved, the false alarm rate of perimeter intrusion alarm positioning is reduced, manpower resources are saved, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of security, and in particular to a force-vibration integrated monitoring device. Background Art

[0002] Distributed low-frequency fiber Bragg grating (FBG) is one of the main solutions in the field of perimeter security. However, in actual application, low-frequency fiber Bragg grating can also pick up vibrations generated by surrounding non-invasive behaviors such as human activities, construction, vehicles, and animals, causing false alarms in the system and reducing the accuracy of security monitoring.

[0003] In actual use, relying solely on improvements to system identification algorithms is too costly, and multiple interference sources cannot be effectively filtered out. Utility Model Content

[0004] The utility model provides an integrated force-vibration monitoring device to solve the problems in the prior art of perimeter security field that, when performing stress monitoring and vibration monitoring on intrusion behaviors, the layout of the monitoring equipment on the fence is too complicated, and it is easily affected by vibrations generated by external non-invasive behaviors, leading to false alarms, low security monitoring accuracy and high costs.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide an integrated force-vibration monitoring device, including a monitoring fence and a monitoring host, the monitoring fence includes a force-vibration sensing unit and a fence body, the force-vibration sensing unit includes a weak fiber Bragg grating and multiple stress sensors, and the fence body includes a vibration monitoring body and a stress monitoring body; the vibration monitoring body is arranged below the stress monitoring body, the weak fiber Bragg grating is arranged on the vibration monitoring body, and the multiple stress sensors are respectively fixed on the stress monitoring body; the weak fiber Bragg grating is sequentially passed through and connected to multiple stress sensors, and then connected to the monitoring host; the force-vibration sensing unit is used to sense intrusion behavior, and is also used to convert the intrusion behavior into an optical signal and input it into the monitoring host; the monitoring host is used to demodulate the optical signal and monitor the intrusion behavior.

[0006] In some embodiments, the weak fiber Bragg grating includes a peripheral portion, an integral portion and a connecting portion; the peripheral portion is arranged on the periphery of the vibration monitoring body, the first end of the peripheral portion extends along the layout direction of the vibration monitoring body, and the second end of the peripheral portion is connected to the first end of the integral portion; the integral portion is laid on the vibration monitoring body in a multi-section curved shape, the second end of the integral portion is connected to the first end of the connecting portion; the second end of the connecting portion is connected to the monitoring host.

[0007] In some embodiments, the integral portion includes a plurality of sequentially connected sensing segments, each of the sensing segments is disposed between two adjacent stress sensors, and a head end and a tail end of each of the sensing segments are respectively connected to the stress sensor.

[0008] In some embodiments, the sensing segment includes a first sensing part, a second sensing part and a third sensing part; the first end of the first sensing part is connected to the stress sensor, and the second end of the first sensing part is connected to the first end of the second sensing part; the second sensing part is wound in a multi-layer circle shape, the second end of the second sensing part is connected to the first end of the third sensing part, and the second end of the third sensing part is connected to the stress sensor.

[0009] In some embodiments, the sensing segment is arranged between two adjacent stress sensors in the shape of a sine or cosine curve.

[0010] In some embodiments, the stress monitoring body includes a plurality of vertically arranged stress-bearing rods, the bottoms of the stress-bearing rods are connected to the top of the vibration monitoring body, and each of the stress sensors is arranged on the corresponding stress-bearing rod.

[0011] In some embodiments, the stress monitoring body also includes at least one horizontally arranged protective cable, the protective cable is perpendicular to the stress-bearing rod, the stress-bearing rods are connected to each other through the protective cable, and two adjacent stress sensors are connected through the protective cable.

[0012] In some embodiments, the stress monitoring body also includes a plurality of vertically arranged conduction rods, the bottom of the conduction rods is connected to the top of the vibration monitoring body, the conduction rods and the force-bearing rods are parallel to each other, and a force-bearing rod is arranged between two adjacent conduction rods, and the conduction rods and the force-bearing rods are connected by the protective cable.

[0013] In some embodiments, the stress monitoring body also includes a plurality of vertically arranged load-bearing rods, the bottom of the load-bearing rods is connected to the top of the vibration monitoring body, the load-bearing rods and the load-bearing rods are parallel to each other, and at least one load-bearing rod is arranged between adjacent transmission rods and load-bearing rods, and the load-bearing rods are respectively connected to the transmission rods and the load-bearing rods through the protective cables.

[0014] The beneficial effects of the present invention are as follows: the present invention discloses a force-vibration integrated monitoring device, comprising a monitoring fence and a monitoring host, the monitoring fence comprising a force-vibration sensing unit and a fence body, the force-vibration sensing unit comprising a weak fiber Bragg grating and a plurality of stress sensors, the fence body comprising a vibration monitoring body and a stress monitoring body; the vibration monitoring body is arranged below the stress monitoring body, the weak fiber Bragg grating is arranged on the vibration monitoring body, and the plurality of stress sensors are respectively fixed on the stress monitoring body; the weak fiber Bragg grating is sequentially passed through and connected to the plurality of stress sensors, and then connected to the monitoring host; the force-vibration sensing unit is used to sense intrusion behavior, and is also used to convert intrusion behavior into an optical signal to be input into the monitoring host; the monitoring host is used to demodulate the optical signal and monitor intrusion behavior. The present application can effectively improve the accuracy of perimeter security monitoring, reduce the false alarm rate of perimeter intrusion alarm positioning, save human resources and have low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a force-vibration integrated monitoring device of the present utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of another embodiment of a force-vibration integrated monitoring device of the present utility model;

[0017] Figure 3 It is a structural schematic diagram of a stress monitoring body in a force-vibration integrated monitoring device of the utility model. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0019] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the technical field of this utility model. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0020] Figure 1The force-vibration integrated monitoring device provided by the present invention includes a monitoring fence 1 and a monitoring host 2. The monitoring fence 1 includes a force-vibration sensing unit 11 and a fence body 12. The force-vibration sensing unit 11 includes a weak fiber Bragg grating 111 and multiple stress sensors 112. The fence body 12 includes a vibration monitoring body 121 and a stress monitoring body 122. The vibration monitoring body 121 is arranged below the stress monitoring body 122, the weak fiber Bragg grating 111 is arranged on the vibration monitoring body 121, and multiple stress sensors 112 are respectively fixed on the stress monitoring body 122; the weak fiber Bragg grating 111 is sequentially passed through and connected to multiple stress sensors 112, and then connected to the monitoring host 2. The force-vibration sensing unit 11 is used to sense intrusion behavior, and is also used to convert intrusion behavior into optical signals and input them into the monitoring host 2; the monitoring host 2 is used to demodulate the optical signals and monitor intrusion behavior.

[0021] The weak fiber Bragg grating 111 of the present application can sense the mechanical vibration caused by the intrusion behavior and convert it into a vibration light signal; the stress sensor 112 can sense the stress caused by the intrusion behavior and convert it into a stress light signal, which is transmitted to the weak fiber Bragg grating 111. The weak fiber Bragg grating 111 inputs the vibration light signal and the stress light signal into the monitoring host 2. The monitoring host 2 performs a comprehensive analysis of the vibration light signal and the stress light signal, monitors the location and type of the intrusion behavior, and issues an alarm. The present application generates multi-dimensional signal characteristics through dual perception of vibration light signals and stress light signals, reduces the impact of vibration or stress caused by non-invasive behavior, thereby effectively improving the accuracy of perimeter security monitoring, reducing the false alarm rate of perimeter intrusion alarm positioning, saving human resources and reducing costs.

[0022] Among them, the types of invasive behaviors described in this application refer to behaviors such as overtaking, climbing, rockfall, tree toppling, and cutting; non-invasive behaviors refer to disturbance behaviors caused by some wind, rain, and trains.

[0023] In this embodiment, the weak fiber Bragg grating (FBG) 111 is a special type of optical fiber characterized by low reflectivity. Combined with a specially coated optical fiber, this FBG fiber 111 can be used stably in extremely harsh environments, exhibiting advantages such as low optical signal transmission loss, high mechanical strength, and strong multiplexing capability. The FBG fiber 111 also features high capacity, long distance, and high precision, meeting the needs of tens of thousands of monitoring points. Using the FBG 111 enables efficient and accurate monitoring and measurement.

[0024] In this embodiment, the stress sensor 112 is a chip sensor. In this application, a stress sensor 112 is fixed on the stress monitoring body 122 every 36 meters.

[0025] Further, such as Figure 1As shown, the weak fiber Bragg grating 111 includes a peripheral portion 3, an integral portion 4, and a connecting portion 5. The peripheral portion 3 is arranged on the periphery of the vibration monitoring body 121. The first end of the peripheral portion 3 extends along the layout direction of the vibration monitoring body 121, and the second end of the peripheral portion 3 is connected to the first end of the integral portion 4. The integral portion 4 is laid on the vibration monitoring body 121 in a multi-section curved shape. The second end of the integral portion 4 is connected to the first end of the connecting portion 5. The second end of the connecting portion 5 is connected to the monitoring host 2.

[0026] Specifically, the peripheral portion 3 is laid in the peripheral area of the vibration monitoring body 121 and is installed underground. When a person approaches the monitoring fence 1 and enters the monitoring area, the peripheral portion 3 laid in the peripheral area of the vibration monitoring body 121 can sense the intrusion in advance. The integral portion 4 is laid in a multi-section curved shape along the middle of the vibration monitoring body 121. The laying length is the length of the crossbeam of the vibration monitoring body 121, and the installation method is bundling. The integral portion 4 helps to accurately locate the vibration position of the weak fiber grating 111 caused by the intrusion, and the exact geographical location of the intrusion can be further determined by the vibration position. The connecting portion 5 is connected to the monitoring host 2 and is used to transmit the optical signal generated by the intrusion perceived by the peripheral portion 3 and the integral portion 4 to the monitoring host 2 for analysis and monitoring. When a person climbs or damages the vibration monitoring body 121, the vibration monitoring body 121 generates mechanical vibration, and the weak fiber grating 111 converts the mechanical vibration into a vibration light signal and transmits it to the monitoring host 2.

[0027] Furthermore, the integral portion 4 includes a plurality of sequentially connected sensing segments 41. Each sensing segment 41 is disposed between two adjacent stress sensors 112, and the leading and trailing ends of each sensing segment 41 are connected to a stress sensor 112, respectively. The sensing segments 41 can not only sense the mechanical vibrations caused by intrusion but also receive stress optical signals converted from the stress sensed by the stress sensor 112.

[0028] In this embodiment, if Figure 1 As shown, the sensing segment 41 includes a first sensing portion 42, a second sensing portion 43, and a third sensing portion 44. The first end of the first sensing portion 42 is connected to the stress sensor 112, and the second end of the first sensing portion 42 is connected to the first end of the second sensing portion 43. The second sensing portion 43 is arranged in a multi-layered, circular configuration, with the second end of the second sensing portion 43 connected to the first end of the third sensing portion 44, and the second end of the third sensing portion 44 is connected to the stress sensor 112. The multi-layered, circular configuration of the second sensing portion 43 increases the length of the weak fiber Bragg grating 111 within a single sensing segment 41, thereby reducing false alarms and improving reliability.

[0029] As another embodiment of the present application, Figure 2As shown, the sensing segment 41 is arranged between two adjacent stress sensors 112 in the form of a sine or cosine curve. The benefit of this structural setting is mainly reflected in improving the stability and reliability of the weak fiber Bragg grating 111. By making the weak fiber Bragg grating 111 have a sine or cosine curve structure, it has a good fiber excess length; when the weak fiber Bragg grating 111 is bent or subjected to tension, it can effectively avoid damage, thereby improving the stability and reliability of the product. In addition, this structure also helps to maintain the performance of the weak fiber Bragg grating 111 in a low temperature environment and avoid signal transmission problems caused by temperature changes. The sine or cosine curve setting increases the length of the weak fiber Bragg grating 111 in a single sensing segment 41, thereby reducing false alarms and missed alarms and improving reliability.

[0030] Further, combined Figure 1 、 Figure 3 As shown, the stress monitoring body 122 includes a plurality of vertically arranged stress-bearing rods 6, conductive rods 8, load-bearing rods 9 and at least one horizontally arranged protective cable 7.

[0031] Specifically, the bottoms of the stress-bearing rod 6, the transmission rod 8, and the load-bearing rod 9 are all connected to the top of the vibration monitoring body 121. The stress-bearing rod 6, the transmission rod 8, and the load-bearing rod 9 are arranged parallel to each other; and there is a stress-bearing rod 6 between two adjacent transmission rods 8, and at least one load-bearing rod 9 is arranged between adjacent transmission rods 8 and stress-bearing rods 6. The protective cable 7 is perpendicular to the stress-bearing rod 6, the transmission rod 8, and the load-bearing rod 9, respectively, and the stress-bearing rod 6, the transmission rod 8, and the load-bearing rod 9 are connected by the protective cable 7. Each stress sensor 112 is arranged on the corresponding stress-bearing rod 6, and the weak fiber grating 111 passes through multiple corresponding stress sensors 112 in sequence. Two adjacent stress sensors 112 are connected by the protective cable 7.

[0032] In this embodiment, the bottoms of the stress-bearing rod 6, the conduction rod 8 and the load-bearing rod 9 are all connected to the top crossbeam of the vibration monitoring body 121, and the installation method is bolt fixing. In this application, a stress sensor 112 is set every 36 meters, so the distance between two adjacent stress-bearing rods 6 is also 36 meters. The conduction rod 8 is used to transmit the stress generated by the deformation of the protective cable 7 when it is subjected to invasion or non-intrusion behavior, so that the force on each protective cable 7 remains balanced. When any one or more protective cables 7 are disturbed, the force on each protective cable 7 is consistent. Multiple stress sensors 112 are connected through the protective cable 7. When the protective cable 7 is subjected to invasion or non-intrusion behavior, it is deformed and the stress is transmitted to the stress sensor 112 connected thereto. The load-bearing rod 9 can be erected to support the protective cable 7 and enhance stress conduction.

[0033] Further, such as Figure 1As shown, the monitoring host 2 is installed in the nearest machine room 21, and is used to demodulate the vibration light signal and stress light signal from the weak fiber Bragg grating 111, realize double verification of the light signal, generate positioning alarm, identify the type of intrusion behavior or optical fiber mileage and geographic location calibration.

[0034] In some other embodiments, the monitoring host 2 may also be installed in other places such as a cabinet near the monitoring section.

[0035] It can be seen that the present invention discloses a force-vibration integrated monitoring device, including a monitoring fence and a monitoring host, the monitoring fence includes a force-vibration sensing unit and a fence body, the force-vibration sensing unit includes a weak fiber Bragg grating and multiple stress sensors, and the fence body includes a vibration monitoring body and a stress monitoring body; the vibration monitoring body is arranged below the stress monitoring body, the weak fiber Bragg grating is arranged on the vibration monitoring body, and multiple stress sensors are respectively fixed on the stress monitoring body; the weak fiber Bragg grating is sequentially passed through and connected to multiple stress sensors, and then connected to the monitoring host; the force-vibration sensing unit is used to sense intrusion behavior, and is also used to convert intrusion behavior into optical signals input into the monitoring host; the monitoring host is used to demodulate the optical signals and monitor intrusion behavior. This application can effectively improve the accuracy of perimeter security monitoring, reduce the false alarm rate of perimeter intrusion alarm positioning, save human resources and have low cost.

[0036] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A force-vibration integrated monitoring device, characterized in that: It includes a monitoring fence and a monitoring host. The monitoring fence includes a force vibration sensing unit and a fence body. The force vibration sensing unit includes a weak fiber Bragg grating and multiple stress sensors. The fence body includes a vibration monitoring body and a stress monitoring body. The vibration monitoring body is arranged below the stress monitoring body, the weak fiber Bragg grating is arranged on the vibration monitoring body, and the multiple stress sensors are respectively fixed on the stress monitoring body; the weak fiber Bragg grating is sequentially passed through the multiple stress sensors and connected to the monitoring host; The force vibration sensing unit is used to sense intrusion behavior and is also used to convert the intrusion behavior into an optical signal and input it into the monitoring host; the monitoring host is used to demodulate the optical signal and monitor the intrusion behavior.

2. The force-vibration integrated monitoring device according to claim 1, characterized in that: The weak fiber Bragg grating comprises a peripheral portion, an integral portion and a connecting portion; The peripheral part is arranged on the periphery of the vibration monitoring body, the first end of the peripheral part extends along the layout direction of the vibration monitoring body, and the second end of the peripheral part is connected to the first end of the integral part; the integral part is laid on the vibration monitoring body in a multi-section curved shape, and the second end of the integral part is connected to the first end of the connecting part; the second end of the connecting part is connected to the monitoring host.

3. The force-vibration integrated monitoring device according to claim 2, characterized in that: The integral portion includes a plurality of sequentially connected sensing segments, each of the sensing segments is arranged between two adjacent stress sensors, and a head end and a tail end of each sensing segment are respectively connected to the stress sensor.

4. The force-vibration integrated monitoring device according to claim 3, characterized in that: The sensing section includes a first sensing portion, a second sensing portion, and a third sensing portion; The first end of the first sensing part is connected to the stress sensor, and the second end of the first sensing part is connected to the first end of the second sensing part; the second sensing part is wound in a multi-layer circle shape, the second end of the second sensing part is connected to the first end of the third sensing part, and the second end of the third sensing part is connected to the stress sensor.

5. The force-vibration integrated monitoring device according to claim 3, characterized in that: The sensing segment is arranged between two adjacent stress sensors in the form of a sine or cosine curve.

6. The force-vibration integrated monitoring device according to claim 1, characterized in that: The stress monitoring body includes a plurality of vertically arranged stress-bearing rods, the bottoms of the stress-bearing rods are connected to the top of the vibration monitoring body, and each of the stress sensors is arranged on the corresponding stress-bearing rod.

7. The force-vibration integrated monitoring device according to claim 6, characterized in that: The stress monitoring body also includes at least one horizontally arranged protective cable, the protective cable and the stress-bearing rod are perpendicular to each other, the stress-bearing rods are connected to each other through the protective cable, and two adjacent stress sensors are connected to each other through the protective cable.

8. The force-vibration integrated monitoring device according to claim 7, characterized in that: The stress monitoring body also includes a plurality of vertically arranged conduction rods, the bottom of the conduction rods is connected to the top of the vibration monitoring body, the conduction rods and the stress-bearing rods are parallel to each other, and a stress-bearing rod is arranged between two adjacent conduction rods, and the conduction rods and the stress-bearing rods are connected by the protective cable.

9. The force-vibration integrated monitoring device according to claim 8, characterized in that: The stress monitoring body also includes a plurality of vertically arranged load-bearing rods, the bottom of the load-bearing rods is connected to the top of the vibration monitoring body, the load-bearing rods and the load-bearing rods are parallel to each other, and at least one load-bearing rod is arranged between adjacent transmission rods and load-bearing rods, and the load-bearing rods are respectively connected to the transmission rods and the load-bearing rods through the protective cables.

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