Entity tilt monitoring apparatus, system, method and device

Abstract

The application discloses an entity inclination monitoring device, system, method and equipment, which comprises a base, a protective shell, an optical fiber and an optical fiber transmission device; the optical fiber transmission device comprises a telescopic rod, a monitoring rod and an optical fiber fixing device; one end of the monitoring rod is fixed on the optical fiber fixing device, and the other end extends out from a limiting guide sliding groove; one end of the telescopic rod is fixed on the upper end of the monitoring rod, and the other end is fixed on the surface of a monitoring entity; an optical fiber Bragg grating sensing point is arranged on the optical fiber monitoring section; the optical fiber Bragg grating sensing point is used for receiving laser and reflecting laser; the reflected laser is used for determining the current optical fiber strain value of the optical fiber monitoring section; and the strain value changes with the inclination of the monitoring entity. The entity inclination monitoring device based on the weak reflection optical fiber grating is simple in manufacturing, small in size, light in weight, low in cost, capable of realizing the quick installation and dismounting of the inclination monitoring device of each monitoring entity, and safe and time-efficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of entity inclination monitoring, in particular to an entity inclination monitoring device, system, method and equipment. BACKGROUND

[0002] Liquefied natural gas (LNG) as a clean, low-carbon, efficient energy, the safety and reliability of its reserves is the focus of our country's sustained attention. LNG storage tank is the most core equipment in the process of production, storage, transportation and use of LNG. In recent years, the construction of LNG storage tank in China is developing towards multi-type, large-scale and cluster. Due to the large load of the storage tank, the complex construction environment, the frequent disasters such as local area earthquake, typhoon, uneven ground settlement, etc., the risk of storage tank inclination and instability is large, therefore, the inclination monitoring of LNG storage tank is of great significance.

[0003] At present, for the inclination monitoring of LNG storage tank, one method is to use total station, three-dimensional scanning, etc., to detect the posture of the storage tank to monitor the inclination of the LNG storage tank; another method is to measure the inclination of the structure by installing inclination sensors, such as vibrating wire type, resistance type, MEMS type, etc. to monitor the inclination of the LNG storage tank.

[0004] However, the above-mentioned methods using total station and three-dimensional scanning have low automation degree, complex data processing process, and the real-time performance of data and results is not strong, which cannot realize long-term uninterrupted monitoring, and are easily affected by external environment; the sensor monitoring method is not suitable for the safety requirements of chemical industry park because the sensors collect electric signals, which are easily affected by electromagnetic interference and have static risk. SUMMARY

[0005] The purpose of the present application is to provide a storage tank monitoring device, system, method and equipment for automatic safety monitoring of the monitored entity.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0007] In a first aspect, the present application provides a storage tank inclination monitoring device, which comprises:

[0008] a base, a protective shell, an optical fiber and an optical fiber transmission device;

[0009] The protective shell is arranged on the base, the optical fiber transmission device is arranged in the protective shell, and a limiting guide sliding groove is arranged at the top of the protective shell.

[0010] The optical fiber transmission device comprises a telescopic rod, a monitoring rod and an optical fiber fixing device.

[0011] One end of the monitoring rod is fixed on the optical fiber fixing device, and the other end extends out of the guide sliding groove;

[0012] One end of the telescopic rod is fixed on the upper end of the monitoring rod, and the other end is used for being fixed on the surface of the monitoring entity, so that when the monitoring entity is inclined, the monitoring rod is driven to move in the guide sliding groove;

[0013] The optical fiber is arranged on the optical fiber fixing device to form an optical fiber monitoring section in the protective shell, wherein the optical fiber monitoring section can be deformed when the monitoring rod moves;

[0014] The monitoring section is provided with a fiber Bragg grating sensing point, which is used for reflecting laser to the weak reflection fiber grating demodulator after receiving the laser emitted by the weak reflection fiber gratt demodulator, and the reflected laser is used to determine the current fiber strain value of the optical fiber monitoring section, and the fiber strain value changes with the inclination of the monitoring entity.

[0015] Optionally, the entity inclination monitoring device provided by the present application, the optical fiber fixing device comprises a reference rod, a movable disc and a fixed disc;

[0016] The reference rod is fixed on the base and perpendicular to the base, the fixed disc is fixed on one end of the reference rod close to the base, and the movable disc is fixed on the other end of the reference rod away from the base through a movable bearing, and the monitoring rod is fixed on the bearing;

[0017] The movable disc and the fixed disc are located on the same side of the reference rod, so that the plane where the monitoring rod moves along the limiting guide sliding groove is parallel to the plane where the movable disc and the fixed disc are located;

[0018] After the optical fiber is fixed on the fixed disc in a U shape, the two ends pass through the movable disc respectively and then pass out from the top of the protective shell, so that two optical fiber monitoring sections are formed between the movable disc and the fixed disc, and the fiber Bragg grating sensing points are arranged on the two optical fiber monitoring sections.

[0019] Optionally, the entity inclination monitoring device provided by the present application, the protective shell comprises a vertical frame, a top plate and a horizontal frame, the limiting guide sliding groove is arranged on the top plate, and the top plate is provided with a through hole, and the two ends of the optical fiber pass out from the through hole respectively.

[0020] Optionally, the entity inclination monitoring device provided by the present application, the vertical frame is fixedly arranged on the base, the horizontal frame is arranged in the vertical frame, and the fixed disc is fixed on the horizontal frame.

[0021] Optionally, the entity inclination monitoring device provided by the present application is characterized in that the two sides of the limiting guide chute are provided with elastic top plates, and the extension direction of the elastic top plates is perpendicular to the direction of the limiting guide chute.

[0022] Optionally, the entity inclination monitoring device provided by the present application is characterized in that the inner wall of the limiting guide chute is provided with a plurality of rolling balls, and the elastic top plates are embedded in the guide chute and in contact with the elastic top plates.

[0023] In the second aspect, the present application provides an entity inclination monitoring system, which comprises a weak reflection fiber grating demodulator and at least one entity inclination monitoring device as described in the first aspect.

[0024] The weak reflection fiber grating demodulator is connected to the entity inclination monitoring device through an optical fiber.

[0025] The weak reflection fiber grating demodulator is used to emit laser to the entity inclination monitoring device, receive the reflected laser from the fiber Bragg grating sensing point in the entity inclination monitoring device, and determine the current fiber strain value of the monitoring fiber segment in the monitoring device according to the received reflected laser, wherein the fiber strain value changes with the inclination of the monitoring entity.

[0026] In the third aspect, the present application provides an entity inclination monitoring method, which is used in the entity inclination monitoring system as described in the second aspect, and the entity inclination monitoring method comprises the following steps.

[0027] Obtaining the fiber strain value corresponding to at least one entity inclination monitoring device of the monitoring entity at the current time, wherein each fiber strain value is determined by the laser reflected by the fiber Bragg grating sensing point in the corresponding entity inclination monitoring device.

[0028] Determining the inclination angle of the monitoring entity at the current time according to at least one fiber strain value and the initial length of the fiber monitoring segment in the corresponding monitoring device.

[0029] Optionally, in the entity inclination monitoring method provided by the present application, when two or more entity inclination monitoring devices are arranged on the monitoring entity, determining the inclination angle of the monitoring entity at the current time according to at least one fiber strain value and the initial length of the fiber monitoring segment in the corresponding entity inclination monitoring device comprises the following steps.

[0030] Determining the inclination angle of each entity inclination monitoring device by the following formula:

[0031]

[0032] S1 is the initial length of the optical fiber in the entity tilt monitoring device, to monitor the strain value at the moment;

[0033] fusing each of the tilt angles to obtain a total tilt angle of the monitoring entity at the current moment.

[0034] In a fourth aspect, the present application provides a computer device, comprising a memory, a processor to store a computer program on the memory and run the computer program on the processor, and the processor executes the computer program to implement the entity tilt monitoring method according to the third aspect.

[0035] According to the specific embodiments of the present application, the following technical effects are achieved:

[0036] The present application provides an entity tilt monitoring device, system, method and equipment based on the entity tilt monitoring device, system, method and equipment, which sets the entity tilt monitoring device based on the weak reflection fiber grating based on the weak reflection grating, so that when the monitoring entity tilts, the telescopic rod moves, and then the monitoring rod moves in the limiting guide groove, so that the optical fiber deforms under the movement of the monitoring rod, and then the monitored optical fiber strain value is used to represent the tilt of the monitoring object.

[0037] Therefore, the entity tilt monitoring device based on the weak reflection fiber grating provided by the present application is simple in manufacturing, small in size, light in weight, low in cost, and can realize quick installation and disassembly of the slope monitoring device of each monitoring entity, is suitable for different types of entity buildings or facilities, and has strong operability and turnover.

[0038] Moreover, compared with the traditional tank tilt monitoring technology of total station and three-dimensional scanning, the present application uses the weak reflection fiber grating sensing technology to realize real-time automatic online monitoring of multiple monitoring entities, and the weak reflection fiber grating can be connected with dozens to hundreds of measuring points on one optical fiber to realize tilt monitoring of all monitoring entities, simplifying the layout process and saving installation time and cost, and having safety timeliness.

[0039] Finally, the entity tilt monitoring device based on the weak reflection fiber grating used in the present application does not need to be powered on, and is not electrified itself, without the risk of static electricity generating electric sparks of the traditional resistance sensor, and without any influence on the monitoring entity itself, without damaging the intrinsic safety of the monitoring entity, meeting the safety requirements in various fields. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 Structure schematic diagram of the entity tilt monitoring device based on the weak reflection fiber grating according to some embodiments of the present application;

[0042] Figure 2 Structure schematic diagram of the entity tilt monitoring device based on the weak reflection fiber grating according to some embodiments of the present application;

[0043] Figure 3 Structure schematic diagram of the fiber and the fiber Bragg grating sensing point according to some embodiments of the present application;

[0044] Figure 4 Connection structure schematic diagram of the horizontal frame and the fixed disc according to some embodiments of the present application;

[0045] Figure 5 Structure schematic diagram of the ball according to some embodiments of the present application;

[0046] Figure 6 Structure schematic diagram of the ball and the elastic top plate according to some embodiments of the present application;

[0047] Figure 7 Application scenario schematic diagram of the entity tilt monitoring system according to some embodiments of the present application;

[0048] Figure 8 Application scenario schematic diagram of the entity tilt monitoring system according to some embodiments of the present application;

[0049] Figure 9 Application scenario schematic diagram of the entity tilt monitoring system according to some embodiments of the present application;

[0050] Figure 10 Structure schematic diagram of the entity tilt monitoring system according to some embodiments of the present application;

[0051] Figure 11 Principle schematic diagram of the entity tilt monitoring method according to some embodiments of the present application;

[0052] Figure 12 Structure schematic diagram of a computer device provided by an embodiment of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0054] 100-base, 200-protective shell, 201-limiting guide slot, 202-horizontal steel frame, 203-vertical steel frame, 204-through hole, 205-top plate, 300-fiber transmission device, 310-fiber fixing device, 301-telescopic rod, 302-monitoring rod, 303-moving disc, 304-fixed disc, 305-reference rod, 401-fiber, 402-fiber Bragg grating sensing point, 01-rolling ball, 02-elastic top plate. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] The above purposes, features and advantages of the present application will be more obvious, and the present application will be described in further detail below with reference to the drawings and specific embodiments.

[0057] It can be understood that, in the present application, in order to solve the problems of low automation degree, real-time and safety in the related art entity tilt monitoring, a weak reflection fiber Bragg grating-based entity tilt monitoring device is set by using fiber sensing technology, so as to realize automatic, real-time and safe monitoring of the monitoring entity tilt angle.

[0058] It can be understood that the fiber sensing technology is a new means in the field of structural health monitoring, which has the advantages of wide monitoring range, small and flexible, high sensitivity, no electricity and intrinsic safety, etc.

[0059] The weak reflection fiber Bragg grating sensor based on the weak reflection fiber Bragg grating technology is a sensor that can simultaneously sense hundreds of fiber Bragg grating points on one fiber. Such a sensor not only has the advantages of high measurement accuracy, easy installation, easy networking, and real-time automatic online monitoring of traditional fiber Bragg grating sensors, but also has the characteristics of multiple measurement points, large-scale networking, and high data collection efficiency, and has a strong application prospect in the field of large-scale tank group tilt monitoring.

[0060] That is, the specific sensing device designed in the present application, and the conversion and calculation method of fiber measurement data and tilt angle are proposed, and it is applied to the field of large-scale tank group safety monitoring, which has important significance.

[0061] It can be understood that the entity tilt monitoring device, system and method based on the weak reflection fiber grating provided by the application can be used for the tilt monitoring of various entity objects, such as various gas tanks, liquid pipes and other large tank bodies, or buildings, structures and facilities.

[0062] That is, the application scenario of the monitoring technology is not limited by the application, as long as there is a need for tilt monitoring of entity objects.

[0063] In order to better understand the entity tilt monitoring device, system, method and equipment provided by the application, the following will be described in detail with the help of the accompanying drawings.

[0064] As shown in Figure 1 and Figure 2 The structure of the entity tilt monitoring device based on the weak reflection fiber grating provided by the application is shown in Figure 1 and Figure 2 The device specifically can include:

[0065] Base, protective shell, optical fiber and optical fiber transmission device;

[0066] The protective shell is arranged on the base, and the optical fiber transmission device is arranged in the protective shell. The top of the protective shell is provided with a limiting guide sliding groove;

[0067] The optical fiber transmission device includes an extension rod, a monitoring rod and an optical fiber fixing device;

[0068] One end of the monitoring rod is fixed to the optical fiber fixing device, and the other end extends out of the guide sliding groove;

[0069] One end of the extension rod is fixed to the upper end of the monitoring rod, and the other end is used for fixing on the surface of the monitoring entity, so that when the monitoring entity tilts, the monitoring rod moves in the guide sliding groove;

[0070] The optical fiber is arranged on the optical fiber fixing device to form an optical fiber monitoring section in the protective shell. The optical fiber monitoring section can be deformed when the monitoring rod moves;

[0071] The monitoring section is provided with a fiber Bragg grating sensing point. After receiving laser, the fiber Bragg grating sensing point reflects laser. The reflected laser is used to determine the current fiber strain value of the optical fiber monitoring section. The fiber strain value changes with the tilt of the monitoring entity;

[0072] As shown in Figure 3As shown, the monitoring section is provided with a fiber Bragg grating sensing point, which is used to receive laser emitted by a weak reflection fiber grating demodulator and reflect laser to the weak reflection fiber grating demodulator, and the reflected laser is used to determine the current fiber strain value of the fiber monitoring section, and the strain value changes with the inclination of the monitoring entity.

[0073] Specifically, the inclination monitoring device based on the weak reflection fiber grating provided by the embodiment of the present application can first set an external structure, i.e. set a base 100 and a protective shell 200 perpendicular to the base, and then set a fiber and a fiber transmission device 300 in the protective shell 200.

[0074] That is, first, the fiber fixing device 310 is arranged inside the protective shell, so that the two ends of the fiber in the entity inclination monitoring device are wound on the fiber fixing device 310 and then pass out from the top of the protective shell. And the monitoring rod 302 is fixed on the fiber fixing device 310, so that the monitoring rod 302 extends from the limiting guide slot 201 arranged on the top of the protective shell 200, and then the telescopic rod 301 is arranged on the top of the monitoring rod 302, and the telescopic rod is perpendicular to the monitoring rod, and the other end of the telescopic rod is fixed on the surface of the monitoring object, so as to transmit the inclination of the monitoring object to the entity inclination monitoring device.

[0075] The telescopic rod can be a hydraulic telescopic rod.

[0076] Then in actual work, the entity inclination monitoring device is installed in the vicinity of the monitoring object, i.e. the base is fixed near the monitoring entity by means of bolts, and then the telescopic rod can be fixed on the surface of the monitoring entity by welding. So that when the monitoring entity inclines, the telescopic rod will move, and then the monitoring rod will move in the limiting guide slot, so that the fiber will deform under the movement of the monitoring rod.

[0077] It can be understood that the fiber strain corresponding to the deformation corresponds to the inclination of the monitoring entity, i.e. the strain value generated by the deformation of the fiber can reflect the inclination of the monitoring object, so that the fiber strain value of the monitored fiber is used to represent the inclination of the monitoring object.

[0078] That is, in the invention, the entity inclination monitoring device is connected with the tank through the hydraulic telescopic rod at the upper end of the monitoring rod, and when the tank inclines, the monitoring rod will also incline, driving the fiber grating inside the protective shell to stretch correspondingly, so that the optical energy inside the fiber will also change, and by analyzing the change in the spectrum, the inclination angle of the monitoring entity can be measured.

[0079] Therefore, the tilt monitoring device for monitoring objects provided in this embodiment of the invention is simple to manufacture, small in size, light in weight, and low in cost. It can realize the rapid installation and disassembly of physical tilt monitoring devices, and is suitable for different types of physical buildings or facilities. It has strong operability and reusability.

[0080] Compared to traditional tank tilt monitoring technologies such as total stations and 3D scanning, this invention utilizes weak-reflection fiber optic grating (FRP) sensing technology to simultaneously achieve real-time automated online monitoring of multiple tanks. Furthermore, a single FRP grating can connect dozens to hundreds of measuring points in series on a single optical fiber, enabling tilt monitoring of all monitored entities with just one fiber. This simplifies deployment and saves installation time and costs. In short, using FRP sensing technology enables long-distance, large-scale, distributed, continuous, real-time monitoring and accurate acquisition of tilt data from monitored entities, ensuring safety and timeliness.

[0081] In addition, the monitoring device used in this invention does not require power and is not itself charged, so there is no risk of electric sparks generated by static electricity in traditional resistive sensors; moreover, this device has no impact on the tank itself, fully meets the safety requirements of chemical storage tanks, and will not damage the inherent safety of the tank.

[0082] Optionally, such as Figure 2 and Figure 4 As shown, in order to simplify the structure and achieve real-time monitoring, in some embodiments of the present invention, the optical fiber fixing part may include a reference rod 305, a movable disk 303 and a fixed disk 304.

[0083] The reference rod is fixed to the base and is perpendicular to the base. The fixed disk is fixed to the end of the reference rod near the base. The movable disk is fixed to the end of the reference rod away from the base through a movable bearing. The monitoring rod is fixed to the bearing.

[0084] The movable disk and the fixed disk are located on the same side of the reference rod, so that the monitoring rod moves along the limiting guide groove to the plane where it is located when it is moving, and is parallel to the plane where the movable disk and the fixed disk are located;

[0085] After the optical fiber 401 is fixed in a U-shape on the fixed disk, its two ends pass around the movable disk and then pass out from the top of the protective shell, so that two optical fiber monitoring segments are formed between the movable disk and the fixed disk. The fiber Bragg grating sensing point 402 is set on the two optical fiber monitoring segments.

[0086] Specifically, the tilt monitoring device provided by the application is characterized in that, in order to realize the fixation of the optical fiber and the transmission setting with the monitoring rod, the optical fiber fixation part can comprise a reference rod 305 arranged perpendicularly to the base, a fixed disc 304 fixed to the lower end of the reference rod to ensure non-rotation, and a movable disc 303 fixed to the upper end of the reference rod.

[0087] The movable bearing is connected with the reference rod.

[0088] Correspondingly, one end of the monitoring rod 302 is fixedly arranged on the movable bearing.

[0089] Correspondingly, after the optical fiber is fixed in a U shape on the fixed disc, the two ends of the optical fiber extend to the two sides of the movable disc respectively, and are fixed on the two sides of the movable disc by using epoxy resin glue, and then are wound around the bearing once, and finally are respectively pulled out from the two through holes reserved on the top plate of the protective shell.

[0090] The disc of the fixed disc and the disc of the movable disc are located on the same plane and on the same side of the reference rod.

[0091] The plane where the limiting guide sliding groove is located is parallel to the plane where the fixed disc and the movable disc are located, so that when the monitoring rod moves in the limiting guide sliding groove under the driving of the telescopic rod, the moving plane and the disc of the fixed disc and the movable disc are located on the same plane, so that the optical fiber wound on the fixed disc and the movable disc can be deformed.

[0092] It can be understood that, in the embodiment of the application, as shown in Figure 2 and Figure 3 , in order to make the monitoring device perfect in function, the fiber Bragg grating sensing points 402 can be arranged on the two optical fiber monitoring sections.

[0093] For example, in some embodiments, in order to facilitate the device manufacturing process, the two weak reflection grating points 401 can be located in the middle of the two discs.

[0094] Optionally, as shown in Figure 2 and Figure 3 , in some embodiments of the application, the protective shell comprises a vertical frame 203, a top plate and a horizontal frame 202, and the limiting guide sliding groove is arranged on the top plate.

[0095] Therefore, in some embodiments, in order to make the wiring of the optical fiber stable, two through holes 201 can be arranged on the top plate of the protective shell, so that the two ends of the optical fiber extend to the two sides of the movable disc respectively, are fixed on the two sides of the movable disc by using epoxy resin glue, are wound around the bearing once, and are respectively pulled out from the two through holes reserved on the top plate of the protective shell.

[0096] Further, in order to protect the optical fiber and avoid damage, a rubber protection ring can be arranged on the side wall of the optical fiber reserved hole to ensure the service life of the optical fiber.

[0097] In order to stably install the optical fiber fixing part in the protective shell, a horizontal steel frame 202 can be arranged in the protective shell, so that the fixing disc is fixed on the horizontal steel frame 202.

[0098] Optionally, as shown in Figures 1 to 6 some embodiments of the present application, in order to improve the stability of the monitoring device, the two sides of the limiting guide slot are provided with an elastic top plate 02, and the extension direction of the elastic top plate is perpendicular to the direction of the limiting guide slot.

[0099] Further, in some embodiments, the inner wall of the limiting guide slot is provided with a ball 01, and the elastic top plate is embedded in the guide slot, and the ball can be arranged in the limiting guide slot in contact with the elastic top plate.

[0100] Specifically, as shown in Figure 5 and Figure 6 some embodiments of the present application, in order to protect the monitoring device and avoid extrusion of the device when the monitoring object moves towards the telescopic rod, a ball can be arranged in the guide slot, and a elastic top plate is arranged behind the ball, which can support the monitoring rod and absorb the pressure received by the monitoring rod in the y direction.

[0101] Further, in some embodiments of the present application, the elastic top plate can be further provided with an optical fiber pressure sensing device, which will touch the optical fiber pressure sensing device when the inclination angle exceeds a certain threshold value, and issue an alarm, which is in response to the entity inclination monitoring device based on the weak reflection fiber grating, and achieves double early warning.

[0102] For example, in the monitoring scene of the inclination of the storage tank, the telescopic rod at the upper end of the monitoring rod is connected with the tank body.

[0103] As shown in Figure 2 , the monitoring rod can make linear reciprocating motion in the x direction in the limiting guide slot, and when the tank body is inclined in the x direction, the optical fiber will be stretched correspondingly.

[0104] When the tank body is inclined in the y direction, the monitoring rod will be limited by the guide slot to ensure the monitoring accuracy. Meanwhile, a ball is arranged in the guide slot, and an elastic top plate is arranged behind the ball, which can support the monitoring rod and absorb the pressure received by the monitoring rod in the y direction. An optical fiber pressure sensing device is arranged behind the top plate, which will touch the optical fiber pressure sensing device when the inclination angle exceeds a certain threshold value, and issue an alarm, which is in response to the monitoring device, and achieves double early warning.

[0105] It can be understood that, asFigure 7 and Figure 8 As shown in the above embodiments, the entity tilt monitoring device based on the weak reflection fiber grating can be arranged around the monitored entity object according to the monitored entity object in actual use.

[0106] In another aspect, the present application also provides an entity tilt monitoring system based on the weak reflection fiber grating.

[0107] As shown in the above embodiments, the entity tilt monitoring device based on the weak reflection fiber grating can be arranged around the monitored entity object according to the monitored entity object in actual use. Figure 9 As shown in the above embodiments, the entity tilt monitoring device based on the weak reflection fiber grating can be arranged around the monitored entity object according to the monitored entity object in actual use.

[0108] The weak reflection fiber grating demodulator and the entity monitoring device are connected through the optical fiber;

[0109] The weak reflection fiber grating demodulator is used to emit laser to the entity tilt monitoring device based on the weak reflection fiber grating, receive the reflected laser from the fiber Bragg grating sensing point in the optical fiber of the entity tilt monitoring device based on the weak reflection fiber grating, and determine the current fiber strain value of the monitoring fiber segment in the monitoring device according to the received reflected laser, which changes with the tilt of the monitored entity.

[0110] Specifically, when setting up the monitoring system, first, the arrangement of a single monitoring entity can be performed, such as fixing at least one monitoring object on the surface of the monitoring entity.

[0111] For example, in combination with Figure 7 and Figure 8 In the scenario of monitoring the tilt of the storage tank, the monitoring device can be installed on the north and east directions of the tank body.

[0112] That is, when the monitoring object is a storage tank, one monitoring device can be installed on the north and east directions of the tank body, that is, the monitoring device is connected to the tank body through the hydraulic telescopic rod located at the upper end of the monitoring rod.

[0113] In actual use, when the storage tank tilts in the east-west direction, the monitoring rod of the monitoring device on the south side will also tilt, thereby causing the fiber grating inside the protective shell to be stretched accordingly.

[0114] Further, the light wave inside the grating will also change, and finally through the analysis of the change of the light wave, the measurement of the east-west direction tilt angle of the storage tank based on the fiber grating structure can be realized.

[0115] Or, when the tank occurs in the north-south direction, the monitoring rod of the monitoring device on the north side will also be tilted, and the optical fiber inside the protective shell will be stretched accordingly.

[0116] Further, the light wave inside the grating will also change, and finally through the analysis of the change of the light wave, the measurement of the inclination angle of the tank in the north-south direction based on the optical fiber grating structure can be realized.

[0117] It can be understood that when there are multiple monitoring entities, monitoring objects can be arranged on each entity.

[0118] Further, when the single monitoring device is laid out, all the optical fibers of the monitoring objects on the monitoring entity can be connected and connected to the weak reflection grating demodulator equipment, so that in actual use, the weak reflection grating demodulator equipment can collect spectral data and convert it into digital signals to realize the inclination of the monitoring entity.

[0119] For example, as Figure 10 The system is applied to the scene diagram of the tank inclination monitoring.

[0120] It can be understood that the weak reflection fiber grating demodulator is provided with a laser module, which can emit laser to the optical fiber of each weak reflection fiber grating-based entity inclination monitoring device, so that the laser propagates in the whole optical fiber. When encountering the fiber Bragg grating sensing point on the monitoring device, a wavelength signal will be returned, that is, each weak reflection fiber grating point on both sides of the disc in each monitoring device will reflect the corresponding wavelength signal, and then the strain value of the point can be calculated through the wavelength signal and the wavelength strain characteristic value, and then the inclination of the monitoring entity can be calculated through the strain value.

[0121] In order to better understand and illustrate the determination of the inclination angle of the monitoring object by using the deformation of the optical fiber in the embodiment of the application, the following will be described in detail. Figure 11

[0122] The monitoring method can be executed by a processing device, that is, a computer device, that is, the collected data is transmitted to the processing device by the weak reflection fiber grating demodulator, and then the processing device processes and analyzes the collected data to realize accurate analysis and calculation of the inclination angle of the monitoring entity.

[0123] The monitoring method can specifically include the following steps:

[0124] S110, obtaining at least one entity inclination monitoring device corresponding to the optical fiber strain value of the monitoring entity at the current time, each optical fiber strain value being determined by the laser reflected by the fiber Bragg grating sensing point in the corresponding weak reflection fiber grating-based entity inclination monitoring device;

[0125] ​S120, determining the tilt angle of the monitoring entity at the current time according to the at least one fiber strain value and the initial length of the fiber monitoring section in the corresponding monitoring device.

[0126] Specifically, in combination with Figure 11 As shown, when monitoring the tilt of a certain monitoring entity, such as at time t, the weak reflection fiber grating demodulator can emit laser to each weak reflection fiber grating-based entity tilt monitoring device arranged, so that the laser is transmitted to each fiber Bragg grating sensing point through the fiber.

[0127] It can be understood that when the monitoring entity tilts, the telescopic rod drives the monitoring rod to rotate, so that the fiber in each weak reflection fiber grating-based entity tilt monitoring device is deformed, so that the laser is received at each weak reflection fiber Bragg grating sensing point, and then fed back to the weak reflection fiber grating demodulator. After the weak reflection fiber grating demodulator receives the feedback laser, the received light energy can be analyzed to determine the fiber strain value of the weak reflection fiber grating-based entity tilt monitoring device at the current time, and then transmitted to the computer device, so that the computer device can receive the fiber strain value sent by each weak reflection fiber grating-based entity tilt monitoring device in the system.

[0128] Finally, the computer device can calculate the current tilt angle of the monitoring entity according to the received fiber strain value and the initial length of the fiber monitoring section.

[0129] Optionally, in some embodiments, when two or more weak reflection fiber grating-based entity tilt monitoring devices are arranged on the monitored entity, the corresponding tilt angle of each weak reflection fiber grating-based entity tilt monitoring device can be calculated first by using the corresponding fiber strain value of each weak reflection fiber grating-based entity tilt monitoring device, and then the tilt angles are fused to obtain the total tilt angle of the monitoring entity at the current time.

[0130] In practice, the tilt angle of each weak reflection fiber grating-based entity tilt monitoring device can be determined by the following formula:

[0131]

[0132] Wherein, S1 is the initial length of the fiber in the weak reflection fiber grating-based entity tilt monitoring device, is the strain value at the monitoring time.

[0133] For example, for a monitoring entity as shown in Figure 10In the tank scenario shown, by placing a tilt monitoring device in each of the north and east directions of the tank, the overall attitude of the tank can be monitored, the maximum tilt direction and tilt angle can be found, and theoretical guidance can be provided for taking subsequent reinforcement and support measures.

[0134] like Figure 11 As shown, the specific analysis and calculation process is as follows:

[0135] When the storage tank tilts to the east, the monitoring rod rotates clockwise, and the corresponding rotation angle of the physical tilt monitoring device based on a weak-reflection fiber optic grating, located on the due north side, is θ. N (t).

[0136] At this time, as Figure 11 As shown, the S1 segment of the optical fiber undergoes tensile deformation with a tensile strain of ε1, while the S2 segment of the optical fiber undergoes compressive deformation with a compressive strain of ε2.

[0137]

[0138] It is understandable that, due to the cross-sensitivity of strain and temperature in optical fibers, the design... The strain value is the pure strain value after eliminating the effect of temperature on the difference.

[0139] The clockwise rotation of the active disk can be defined. It is positive when rotated counterclockwise and negative when rotated counterclockwise.

[0140] Correspondingly, the amount of disk rotation produced by the rotation of the movable disk is:

[0141] Δs=θ N (t)·R

[0142] It is understandable that, according to the theory of materials mechanics, the elongation of the optical fiber is:

[0143]

[0144] Where S1 is the initial length of the optical fiber between the movable disk and the fixed disk.

[0145] It can be understood that in the above monitoring device, the rotation amount Δs of the movable disk is the same as the fiber elongation ΔS1, that is:

[0146]

[0147] Therefore, we can conclude that:

[0148]

[0149] Where, θ N(t) is the inclination angle of the monitoring object monitored by the measuring device arranged at the south side of the tank at time t, for example, the inclination angle of the tank in the east-west direction monitored by the measuring device arranged at the south side of the tank; is the strain data of the two weak reflection fiber gratings after temperature compensation at time t, and R is the radius of the movable disc.

[0150] In some embodiments of the present application, the positive and negative values of the inclination angle can be defined.

[0151] For example, it can be agreed that when the tank tilts to the east, θ N (t) is positive, when the tank tilts to the west, θ N (t) is negative.

[0152] Correspondingly, θ E (t) can be defined as the inclination angle of the inclination measuring device arranged at the east side of the tank at time t, that is, when the tank tilts to the north, θ E (t) is positive, when the tank tilts to the south, θ E (t) is negative.

[0153] Finally, the inclination angles in the above two directions can be fused to obtain the overall inclination angle of the monitoring object:

[0154]

[0155] It can be understood that for the overall inclination angle, the inclination direction can be determined by the ratio of θ N (t) and θ E (t), that is, the ratio is the tangent value, and the inverse tangent value is the inclination angle.

[0156] It can also be understood that for the strain and temperature cross-sensitivity problem of the fiber sensor itself, the temperature compensation of the inclination monitoring device based on the weak reflection fiber grating designed in the present application can be obtained by subtracting the strain values measured by the two gratings in the device, thereby eliminating the influence of temperature on the strain measurement of the weak reflection fiber grating, and saving the cost of additionally arranging a single temperature compensation measuring point.

[0157] Further, in some embodiments of the present application, a tank area tank inclination monitoring platform can also be built, the fiber grating demodulation equipment is used to collect the tank inclination angle in real time, and the 5G technology is combined to synchronously upload the data to the cloud database and the local server.

[0158] Synchronous real-time automatic online monitoring of multiple tanks is realized, and the weak reflection fiber grating can be connected with dozens to hundreds of measuring points on one optical fiber.

[0159] The monitoring platform can display the inclination data of all tanks in the tank area in real time, and is provided with a multi-terminal query interface;

[0160] The historical data stored by the cloud database or the local server can be used to analyze the situation trend of the tank in the tank area, detect the abnormality and perform predictive maintenance by relying on a big data processing platform and machine learning algorithm.

[0161] The monitoring platform sets different thresholds according to the inclination of the tank body and sets a multi-level alarm mechanism to notify relevant personnel of the abnormal situation in real time through multiple terminals.

[0162] Further, in some embodiments of the present application, an online remote monitoring system can be built.

[0163] The wireless network transmission technology can well solve the problem of data transmission of multiple nodes and long distances.

[0164] It can be understood that, in the embodiments of the present application, the processing device can accurately calculate the inclination angle of the monitored object by analyzing the strain amount fed back by the deformation of the fiber grating in the monitoring device, and the device uses optical working principle and is not electrified, has the intrinsic safety characteristic, can be used in high-risk environments such as chemical storage tanks, and has great advantages.

[0165] At the same time, by using advanced weak reflection fiber grating sensing technology, distributed continuous real-time monitoring and accurate collection of tank body inclination data over a long distance and a large range can be realized, which has safety timeliness.

[0166] That is, compared with the traditional total station, three-dimensional scanning and other tank inclination monitoring technologies, the weak reflection fiber grating sensing technology can realize real-time automatic online monitoring of multiple tank bodies at the same time, and the weak reflection fiber grating can be connected with dozens to hundreds of measuring points on one optical fiber, so that the inclination monitoring of all tank bodies can be realized by only one optical fiber for the whole large LNG tank group, which simplifies the laying process and saves installation time and cost.

[0167] In addition, the monitoring device used in the present application does not need to be electrified and is not electrified itself, and there is no risk of static electricity generating electric sparks as in the traditional resistance sensor; and the device has no any influence on the tank body itself, fully meets the safety requirements of the chemical storage tank, and will not damage the intrinsic safety of the tank body.

[0168] On the other hand, the present application provides a kind of entity inclination monitoring virtual device, and the virtual device specifically includes:

[0169] The acquisition unit is configured to acquire at least one fiber strain value corresponding to the entity inclination monitoring device of the monitored entity at the current time, and each fiber strain value is determined by the laser reflected by the fiber Bragg grating sensing point in the corresponding weak reflection fiber grating-based entity inclination monitoring device.

[0170] The determining unit is configured to determine the tilt angle of the monitoring entity at the current time according to the at least one fiber strain value and the initial length of the fiber monitoring section in the corresponding monitoring device.

[0171] Optionally, the present application provides a virtual entity tilt monitoring device, when two or more weak reflection fiber grating-based entity tilt monitoring devices are arranged on the monitoring entity, the determining unit is specifically configured to:

[0172] The tilt angle of each weak reflection fiber grating-based entity tilt monitoring device is determined by the following formula:

[0173]

[0174] Wherein, S1 is the initial length of the fiber in the weak reflection fiber grating-based entity tilt monitoring device, is the strain value at the monitoring time;

[0175] The tilt angles are fused to obtain the total tilt angle of the monitoring entity at the current time.

[0176] In an exemplary embodiment, a computer device, i.e., a data collection device, which can be a server or a terminal, has an internal structure as shown in Figure 12 The computer device includes a processor, a memory, an input / output interface (I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The database of the computer device is configured to store video tag processing data. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with external terminals through network connection. The computer program is executed by the processor to implement the meteorological data transmission method.

[0177] Those skilled in the art can understand that Figure 12 the structure shown in the figure is only a block diagram of part of the structure related to the present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0178] In an exemplary embodiment, a computer device is also provided, including a memory and a processor, the memory storing a computer program, and the processor implementing the steps in the above method embodiments when executing the computer program.

[0179] In an exemplary embodiment, a computer readable storage medium is provided, storing a computer program, the computer program implementing the steps in the above method embodiments when executed by a processor.

[0180] In an exemplary embodiment, a computer program product is provided, including a computer program, the computer program implementing the steps in the above method embodiments when executed by a processor.

[0181] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0182] It can be understood by those skilled in the art that all or part of the processes in the above method embodiments can be completed by a computer program instructing related hardware, and the computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above method embodiments. Any reference to memory, database or other medium used in the embodiments provided by the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0183] The databases involved in the various embodiments provided by this invention may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchain. The processors involved in the various embodiments provided by this invention may be, but are not limited to, general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc.

[0184] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0185] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A physical tilt monitoring device, characterized in that, The entity tilt monitoring device includes: Base, protective housing, optical fiber and optical fiber transmission device; The protective housing is mounted on the base, the optical fiber transmission device is mounted on the protective housing, and a limit guide groove is provided on the top of the protective housing; The fiber optic transmission device includes a telescopic rod, a monitoring rod, and a fiber optic fixing device. One end of the monitoring rod is fixed to the optical fiber fixing device, and the other end extends out from the limiting guide groove; One end of the telescopic rod is fixed to the upper end of the monitoring rod, and the other end is fixed to the surface of the monitored entity, so that when the monitored entity tilts, the monitoring rod moves within the limiting guide groove. The optical fiber is arranged on the optical fiber fixing device and forms an optical fiber monitoring segment inside the protective housing, wherein the optical fiber monitoring segment can deform when the monitoring rod moves; The fiber optic monitoring section is equipped with fiber Bragg grating sensing points. The fiber Bragg grating sensing points are used to receive the laser emitted by the weak reflection fiber Bragg grating demodulator and reflect the laser back to the weak reflection fiber Bragg grating demodulator. The reflected laser is used to determine the current fiber strain value of the fiber optic monitoring section. The fiber strain value changes with the tilt of the monitored entity. The fiber optic fixing device includes a reference rod, a movable disk, and a fixed disk; The reference rod is fixed on the base and perpendicular to the base. The fixed disk is fixed at the end of the reference rod near the base. The movable disk is fixed at the end of the reference rod away from the base via a movable bearing. The monitoring rod is fixed on the bearing. The movable disk and the fixed disk are located on the same side of the reference rod, so that the monitoring rod moves along the limiting guide groove to the plane where it is located during movement, and is parallel to the plane where the movable disk and the fixed disk are located; After the optical fiber is fixed in a U-shape on the fixed disk, both ends extend to both sides of the movable disk and are fixed on both sides of the movable disk. After passing around the movable disk, it passes through the top of the protective shell, so that two optical fiber monitoring segments are formed between the movable disk and the fixed disk. The optical fiber Bragg grating sensing point is set on the two optical fiber monitoring segments.

2. The entity tilt monitoring device according to claim 1, characterized in that, The protective housing includes a vertical frame, a top plate, and a horizontal frame. The limiting guide groove is disposed on the top plate, and the top plate is provided with through holes, through which the two ends of the optical fiber respectively pass.

3. The entity tilt monitoring device according to claim 2, characterized in that, The vertical frame is fixedly mounted on the base, the horizontal frame is disposed inside the vertical frame, and the fixing disc is fixed on the horizontal frame.

4. The entity tilt monitoring device according to claim 1, characterized in that, The limiting guide groove is provided with elastic top plates on both sides, and the extension and retraction direction of the elastic top plates is perpendicular to the direction of the limiting guide groove.

5. The entity tilt monitoring device according to claim 4, characterized in that, The inner wall of the limiting guide groove is provided with ball bearings, and the elastic top plate is embedded in the guide groove and in contact with the elastic top plate.

6. A system for monitoring the tilt of an entity, characterized in that, The entity tilt monitoring system includes a weak reflection fiber optic grating demodulator and at least one entity tilt monitoring device as described in any one of claims 1-5; The weak reflection fiber optic demodulator is connected to the physical tilt monitoring device via an optical fiber. The weak reflection fiber Bragg grating demodulator is used to emit a laser to the entity tilt monitoring device, receive the laser feedback from the fiber Bragg grating sensing point in the entity tilt monitoring device, and determine the current fiber strain value of the fiber monitoring segment in the monitoring device based on the received reflected laser. The fiber strain value changes with the tilt of the monitored entity.

7. A method for monitoring the tilt of an entity, characterized in that, The entity tilt monitoring method is used in the entity tilt monitoring system as described in claim 6, wherein the entity tilt monitoring method includes: The fiber strain value corresponding to at least one entity tilt monitoring device at the current moment of the monitored entity is obtained, and each fiber strain value is determined by the laser reflected by the fiber Bragg grating sensing point in the corresponding entity tilt monitoring device. The tilt angle of the monitoring entity at the current moment is determined based on at least one of the fiber strain values ​​and the initial length of the corresponding fiber monitoring segment in the monitoring device.

8. The method for monitoring entity tilt according to claim 7, characterized in that, When two or more entity tilt monitoring devices are arranged on the monitored entity, determining the tilt angle of the monitored entity at the current moment based on at least one of the fiber strain values ​​and the initial length of the fiber monitoring segment in the corresponding entity tilt monitoring device includes: The tilt angle corresponding to each tilt monitoring device is determined by the following formula: ； Where S1 is the initial length of the optical fiber in the physical tilt monitoring device. The fiber optic strain value is measured at the monitoring time, and R is the radius of the movable disk. The tilt angles of each tilt angle are fused to obtain the total tilt angle of the monitored entity at the current moment.

9. A computer device, characterized in that, The computer device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the entity tilt monitoring method as described in claim 7 or 8.

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