Fiber bragg grating substrate type static leveling instrument device

Abstract

The utility model discloses a fiber grating substrate type static leveling instrument device which comprises a plurality of static leveling instruments, a plurality of water storage tanks, a plurality of connecting water pipes and a plurality of mounting seats, the plurality of static force level gauges and the water storage tank are mounted on the mounting seat at the planned position, and liquid is uniformly poured into the marked position by the plurality of static force level gauges and the water storage tank; when the monitored position settles, the water level of the static level gauge changes, then the conduction connecting rod of the static level gauge is driven to move, the conduction connecting rod drives the modularized elastic substrate of the static level gauge to deform, the wavelength variation of the fiber bragg grating on the modularized elastic substrate is transmitted through the optical cable, and then settlement data of each point can be obtained. The limiting screw rod group penetrates through the hollow buoy to limit the rotation and the up-and-down stroke of the hollow buoy; the static leveling instrument is calibrated after being processed, and the transmission ratio of the conduction connecting rod is large, so that the detection precision is guaranteed, independent ventilation pipe water replenishing is not needed, the engineering applicability of the sensor is improved, and the mounting requirement is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of fiber grating sensor detection, and particularly relates to a fiber grating substrate type static level device. Background Art

[0002] In large-scale civil engineering, whether it is a project under construction or an operating project, in recent years, settlement accidents of various buildings and structures have shown a high incidence, causing huge losses to the safety of society, people's lives and property. Settlement accidents are characterized by a large number of points, a wide area, strong long-term concealment, and high suddenness. Therefore, settlement monitoring must be carried out during both the construction period and the operation period to ensure the safe operation of buildings.

[0003] Traditional manual measurement takes too much time and has a long monitoring period, and can only reflect the long-term trend of changes. It is difficult to reflect rapid settlement changes. While static level instruments can be used to automatically measure settlement data online. However, most static level instruments use electrical principles such as pressure sensors for monitoring, which are greatly affected by temperature, and the data conversion is complex. Their engineering adaptability and long-term stability are insufficient, and they cannot adapt to high-temperature and complex geomagnetic environments, and cannot conduct long-term and effective monitoring of concealed settlement accidents.

[0004] Fiber grating sensors have the advantages of being immune to electromagnetic interference, high precision, intrinsically safe, and capable of real-time online monitoring. Currently, manufacturers engaged in fiber grating sensing technology at home and abroad generally encapsulate substrates in the way of epoxy resin, fiber grating, and sensing matrix. The epoxy resin glue is only combined with the sensing matrix through physical bonding, and the bonding method is not firm. Moreover, the epoxy resin glue is extremely easy to damage and fall off in high-temperature, high-humidity, strong ultraviolet, and corrosive environments, and needs to be further improved. Summary of the Utility Model

[0005] The utility model provides a fiber grating substrate type static level device, which can solve the problems in the prior art that the liquid in the static level is easy to volatilize and affect the detection accuracy, the long-term stability of the static level with electrical principle is insufficient, and it cannot adapt to high-temperature and complex geomagnetic environments, and the installation is relatively complex.

[0006] To solve the above problems, the technical solutions provided by the utility model are as follows:

[0007] An embodiment of the utility model provides a fiber grating substrate type static level device, which includes a plurality of static level instruments (1), a plurality of water storage tanks (2), a plurality of connecting water pipes (3), and a plurality of mounting seats (4); the plurality of mounting seats (4) are fixed at the planned positions on the settlement surface of the structure, one static level instrument (1) and one water storage tank (2) are both installed on one mounting seat (4), and one static level instrument (1) is connected to one water storage tank (2) through one connecting water pipe (3);

[0008] The static level gauge (1) includes a cylindrical monitoring housing (101), a first waterproof rain cap (102), a ventilation pipe (103), a ventilation diaphragm (104), a limit screw group (105), a hollow float (106), a conduction connecting rod (107), a connecting rod shaft (108), a modular elastic substrate (109), a modular temperature compensation substrate (110), a substrate mounting seat (111), a substrate pressing plate (112), a plurality of first bolts (113), a plurality of second bolts (114), a plurality of waterproof connectors (115) and an optical cable (116);

[0009] A plurality of first threaded holes (101-1) are provided at the bottom of the monitoring housing (101) for installing the waterproof connectors (115) and the plurality of limit screw groups (105). One end of the connecting water pipe (3) passes through the waterproof connectors (115), and the other end of the connecting water pipe (3) is connected to the water storage tank (2); both ends of the first screw (1051) of the limit screw group (105) are provided with first external threads (1051-1), and nuts (1052) are installed on the first external threads (1051-1). The first screw (1051) passes through the hollow float (106), and the hollow float (106) is installed between the two nuts (1052) to limit its upper and lower movement limits; the hollow float (106) is of a cylindrical structure, and a plurality of sealed first through holes (106-1) are provided on its axial surface for the first screw (1051) to pass through; two square support seats (106-2) are symmetrically arranged above the hollow float (106), and one transmission slide plate (106-3) is provided on each of the two support seats (106-2). The transmission slide plate (106-3) is of a plate structure, and its thickness is the same as that of the modular elastic substrate (109); the transmission slide plate (106-3) is embedded on the first tapered cone (107-1) at one end of the conduction connecting rod (107); an irregular circular hole is provided inside the first tapered cone (107-1) for the optical fiber of the optical cable (116) to move.

[0010] A second through hole (107-2) is provided on the conduction connecting rod (107) for passing through the connecting rod shaft (108) and sliding flexibly around the connecting rod shaft (108); a plurality of second threaded holes (101-2) are provided on the side surface of the monitoring housing (101) for fixing the connecting rod shaft (108); the second taper (107-3) at the other end of the conduction connecting rod (107) is in sliding contact with the modular elastic substrate (109), and the modular elastic substrate (109) is made of a flexible elastic material; when the water level in the monitoring housing (101) changes, the hollow float (106) moves up and down, driving the conduction connecting rod (107) to rotate, and the conduction connecting rod (107) drives the modular elastic substrate (109) to bend proportionally; the change amount of the fiber grating wavelength on the modular elastic substrate (109) is transmitted through the optical cable (116), and thus the settlement data of each point on the settlement surface of the structure can be obtained;

[0011] A third threaded hole (101-3) and a third through hole (101-4) are further provided on the side surface of the monitoring housing (101). The third threaded hole (101-3) is also used for installing a waterproof connector (115), and the waterproof connector (115) is used for fixing and sealing the optical cable (116); the monitoring housing (101) is provided with a plurality of third through holes (101-4) for installing a plurality of the first bolts (113). The first bolts (113) pass through the third through holes (101-4) and engage with the fourth threaded holes (111-1) provided on the substrate mounting seat (111), and fix the substrate mounting seat (111) to the inner wall of the monitoring housing (101); the substrate mounting seat (111) is a block structure fixed on the inner wall surface of the monitoring housing (101), and the substrate mounting seat (111) is provided with a fifth threaded hole; the substrate pressing plate (112) is a plate structure, and the substrate pressing plate (112) is provided with a plurality of fifth through holes for passing through the second bolts (114); the second bolts (114) pass through the substrate pressing plate (112), the modular elastic substrate (109), the temperature compensation substrate (110), the modular elastic substrate (109) respectively and engage with the fifth threaded hole; a first circular groove (101-6) is provided at a specified position on the inner wall of the monitoring housing (101) as a liquid level mark;

[0012] The first waterproof rain cap (102) is a conical umbrella-shaped structure located above the monitoring housing (101); a ventilation pipe (103) is connected to the side surface of the first waterproof rain cap (102); the ventilation pipe (103) is a J-shaped tubular structure, and a ventilation diaphragm (104) is installed at the end of the ventilation pipe (103).

[0013] According to an alternative embodiment of the present utility model, the water storage tank (2) includes a cylindrical water storage outer shell (201) and a second waterproof rain cap (202) located above the water storage outer shell (201). A plurality of sixth threaded holes (201-1) are provided at the bottom of the water storage outer shell (201), which are also used for installing a waterproof joint (115). The waterproof joint (115) connects and seals the end of the connecting water pipe (3) close to the water storage outer shell (201). A second internal thread (201-2) is provided on the opening side of the water storage outer shell (201) for meshing with the second external thread of the second waterproof rain cap (202). A second circular groove (201-3) is provided on the inner wall of the water storage outer shell (201) as the liquid level mark of the water storage tank (2).

[0014] According to an alternative embodiment of the present utility model, the mounting base (4) includes a connecting plate (401) and a sliding mounting base (402). The sliding mounting base (402) is fixed at the planned position on the settlement surface of the structure. The connecting plate (401) is slidably connected to the sliding mounting base (402), and the connecting plate (401) is also connected to the water storage outer shell (201) or the monitoring outer shell (101).

[0015] According to an alternative embodiment of the present utility model, the conduction connecting rod (107) has a notch plate-like structure. The first sharp cone (107-1) and the second sharp cone (107-3) are both provided with a triangular sharp structure. A special-shaped hole (107-4) is provided along the outer shape of the second sharp cone (107-3) to leave a deformation space for the modular elastic substrate (109).

[0016] Compared with the prior art, the embodiment of the present utility model provides a fiber grating substrate type static level device, which has the following beneficial effects:

[0017] (1) The static level of the present utility model uses a transmission guide rod to conduct in proportion, reducing the monitoring error and improving the detection accuracy. The ventilation pipe and the ventilation diaphragm cooperate to ensure that the water does not flow out while isolating the external air, and there is no need to separately lay a ventilation pipeline.

[0018] (2) All components are numerically controlled processed, with high product precision. The built-in stroke limit structure is simple, and the assembly and installation are convenient and efficient. The water replenishment is simple and efficient, without worrying about the influence of air bubbles. Moreover, the water storage tank is equipped with existing water level control technical measures such as an automatic floating ball, greatly reducing the possibility of accuracy loss caused by assembly and installation, improving the monitoring accuracy while improving the processing efficiency. The detected data is the settlement amount, and the initial liquid level height does not need to be particularly accurate to achieve high-precision measurement.

[0019] (3) The connecting rod shaft and the conduction connecting rod can be nested with bearings, further reducing the conduction friction. The inclination of the liquid level gauge does not affect the monitoring accuracy. The modular temperature compensation substrate synchronously measures the ambient temperature at the installation position while compensating and correcting the temperature, and is not affected by temperature. The modular temperature compensation substrate and the modular pressure elastic substrate are encapsulated in a special glass solid state. The fiber grating is tightly combined with the elastic substrate, having the advantages of long life, oxidation resistance, fatigue resistance, and not being easily detached, and both are replaceable modules.

[0020] (4) The utility model is applicable to the long-term measurement of the settlement change amount of buildings and structures. Components such as the housing are made of inorganic metals and inorganic non-metals. The detection process does not use electric energy, so it is an intrinsically safe sensor with strong anti-electromagnetic interference performance, can be used for a long time without damage in harsh environments, has a long measurement distance, and can meet the current monitoring requirements in terms of continuity, real-time performance, and measurement sensitivity.

[0021] (5) After the static level is processed, the settlement change amount and the temperature change amount are calibrated and a fitting curve is generated. After installation, the starting wavelength amount and the ambient temperature are recorded. For subsequent measurements, the settlement change amount can be obtained by substituting the measured values into the fitting formula. There is no zero drift phenomenon, avoiding complex calculations and deductions. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a fiber grating substrate type static level device provided by an embodiment of the present application.

[0024] Figure 2 It is a schematic structural diagram of the monitoring housing of a static level provided by an embodiment of the present application.

[0025] Figure 3 It is a schematic cross-sectional view of a static level provided by an embodiment of the present application.

[0026] Figure 4 It is a schematic structural diagram of the hollow float of a static level provided by an embodiment of the present application.

[0027] Figure 5 It is a schematic structural diagram of the conduction connecting rod of a static level provided by an embodiment of the present application.

[0028] Figure 6Schematic diagram of the water storage outer shell structure of a water storage tank provided by an embodiment of the present application. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 efforts belong to the scope of protection of the present application.

[0030] As Figure 1 shown, an embodiment of the present utility model provides a fiber grating substrate type hydrostatic level device, which includes a plurality of hydrostatic levels 1, a plurality of water storage tanks 2, a plurality of connecting water pipes 3 and a plurality of mounting seats 4. The plurality of mounting seats 4 are fixed at the planned positions on the settlement surface of the structure. One hydrostatic level 1 and one water storage tank 2 are both installed on one mounting seat 4. One hydrostatic level 1 is connected to one water storage tank 2 through one connecting water pipe 3. The mounting seat 4 in this embodiment includes a connecting plate 401 and a sliding mounting seat 402. The sliding mounting seat 402 is fixed at the planned position on the settlement surface of the structure. The connecting plate 401 is slidably connected to the sliding mounting seat 402, and the connecting plate 401 is also connected to the monitoring outer shell 101 of the hydrostatic level 1 or the water storage outer shell 201 of the water storage tank 2.

[0031] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the hydrostatic level 1 includes a cylindrical monitoring outer shell 101, a first waterproof rain cap 102, a vent pipe 103, a vent diaphragm 104, a limit screw group 105, a hollow float 106, a conduction connecting rod 107, a connecting rod shaft 108, a modular elastic substrate 109, a modular temperature compensation substrate 110, a substrate mounting seat 111, a substrate pressing plate 112, a plurality of first bolts 113, a plurality of second bolts 114, a plurality of waterproof connectors 115 and an optical cable 116.

[0032] At the bottom of the monitoring housing 101, there are multiple first threaded holes 101-1 for installing a waterproof connector 115 and multiple limit screw groups 105. One end of the connecting water pipe 3 passes through the waterproof connector 115, and the other end of the connecting water pipe 3 is connected to the water storage tank 2. Both ends of the first screw 1051 of the limit screw group 105 are provided with first external threads 1051-1, and nuts 1052 are installed on the first external threads 1051-1. The first screw 1051 passes through the hollow float 106 to limit its upper and lower movement limits. The hollow float 106 is installed between two nuts 1052 to limit its upper and lower movement limits. The hollow float 106 has a cylindrical structure, and its axial surface is provided with multiple sealed first through holes 106-1 for passing through the first screw 1051. Above the hollow float 106, two square support seats 106-2 are symmetrically arranged, and each of the two support seats 106-2 is provided with a transmission slide plate 106-3. The transmission slide plate 106-3 has a plate-like structure, and its thickness is the same as that of the modular elastic substrate 109; the transmission slide plate 106-3 is embedded on the first tapered tip 107-1 at one end of the conduction connecting rod 107; an irregular circular hole is provided in the first tapered tip 107-1 for providing an optical fiber movement space for the optical cable 116.

[0033] The conduction connecting rod 107 is provided with a second through hole 107-02 for passing through the connecting rod shaft 108 and sliding flexibly around the connecting rod shaft 108; the conduction connecting rod 107 has a grooved plate-like structure, and both the first tapered tip 107-1 and the second tapered tip 107-03 are provided with triangular pointed structures. Along the outer shape of the second tapered tip 107-03, an irregular hole 107-04 is provided for leaving a deformation space for the modular elastic substrate 109.

[0034] On the side of the monitoring housing 101, there are multiple second threaded holes 101-2 for fixing the connecting rod shaft 108; the second tapered tip 107-3 at the other end of the conduction connecting rod 107 is in sliding contact with the modular elastic substrate 109, and the modular elastic substrate 109 is made of a flexible elastic material. The center line of the first tapered tip 107-1, the axis of the second through hole 107-02, and the center line of the second tapered tip 107-03 are arranged in the same plane, and the distance from the center line of the first tapered tip 107-1 to the axis of the second through hole 107-02 and the distance from the axis of the second through hole 107-04 to the center line between the second tapered tips 107-03 are in a certain proportion.

[0035] When the water level in the monitoring housing 101 changes, the hollow float 106 moves up and down, driving the conduction connecting rod 107 to rotate, and the conduction connecting rod 107 drives the modular elastic substrate 109 to bend in proportion. The wavelength change amount of the fiber grating of the modular elastic substrate 109 is transmitted through the optical cable 116, and thus the settlement data of each point on the settlement surface of the structure can be obtained.

[0036] On the side of the monitoring housing 101, there are also a third threaded hole 101-3 and a third through hole 101-4. The third threaded hole 101-3 is also used to install a waterproof connector 115, which fixes and seals the optical cable 116. The monitoring housing 101 is provided with a plurality of third through holes 101-4 for installing a plurality of first bolts 113. The first bolts 113 pass through the third through holes 101-4 and engage with the fourth threaded holes 111-1 provided on the substrate mounting seat 111, and fix the substrate mounting seat 111 to the inner wall of the monitoring housing 101. The substrate mounting seat 111 is a block structure fixed on the inner wall surface of the monitoring housing 101, and the substrate mounting seat 111 is provided with a fifth threaded hole 111-2. The substrate pressing plate 112 is a plate-like structure, and the substrate pressing plate 112 is provided with a plurality of fifth through holes for passing through the second bolts 114; the second bolts 114 pass through the substrate pressing plate 112, the modular elastic substrate 109, the temperature compensation substrate 110, the modular elastic substrate 109 respectively and engage with the fifth threaded holes; the central plane of the modular elastic substrate 109 is coplanar with the axis of the connecting rod shaft 108. At a specified position on the inner wall of the monitoring housing 101, there is a first circular groove 101-6 as a liquid level mark.

[0037] The first waterproof rain cap 102 is a conical umbrella-shaped structure located above the monitoring housing 101. The opening surface of the monitoring housing 101 is provided with a first internal thread 101-5, which is connected to the threaded hole of the first waterproof rain cap 102. A vent pipe 103 is connected to the side of the first waterproof rain cap 102; the vent pipe 103 is a J-shaped tubular structure, and the end of the vent pipe 103 is installed with a vent diaphragm 104. The diaphragm 104 is a breathable and hydrophobic material such as aerogel, which isolates the water vapor exchange and does not isolate the gas exchange. The vent pipe 103 can exchange air with the outside to maintain the internal and external air pressures consistent. The dust falling through the fourth through hole lands at the bottom of the arc of the vent pipe 103 and will not enter the internal space.

[0038] Figure 1 and Figure 6 As shown in and, the water storage tank 2 includes a cylindrical water storage outer shell 201 and a second waterproof rain cap 202 located above the water storage outer shell 201. A plurality of sixth threaded holes 201-1 are provided at the bottom of the water storage outer shell 201, which are also used to install the waterproof connector 115, and the waterproof connector 115 connects and seals the end of the connecting water pipe 3 close to the water storage outer shell 201; a second internal thread 201-02 is provided on the opening side of the water storage outer shell 201 for engaging with the second external thread of the second waterproof rain cap 202; a second circular groove 201-3 is provided on the inner wall of the water storage outer shell 201 as the liquid level mark of the water storage tank 2. The second waterproof rain cap 202 is also equipped with a vent pipe and a vent diaphragm.

[0039] Connect the static level 1 and the water storage tank 2 through the connecting water pipe 3. A plurality of static levels 1 and water storage tanks 2 are uniformly filled with liquid to the marked positions at the first circular groove 101-6 and the second circular groove 201-3. Mounting plates 401 of the mounting seat 4 are fixedly installed on the outer walls of the static level 1 and the water storage tank 2, and the relative positions of the mounting plate 401 and the sliding mounting seat 402 can be adjusted. The sliding mounting seat 402 can be fixed at the specified position required for monitoring. Initially install a plurality of static levels and water storage tanks at the planned positions. By adjusting the relative positions of the mounting plate 401 of the mounting seat 4 and the sliding mounting seat 402, ensure that all the liquid reaches the marked positions.

[0040] The working principle of a fiber Bragg grating substrate type static level device of the present utility model is as follows:

[0041] Connect the static level and the water storage tank through multiple connecting water pipes of measured lengths. A plurality of static levels and water storage tanks are uniformly filled with liquid to the marked positions at the first circular groove and the second circular groove, and are all at the same liquid level. Transmit the wavelength change amount of the fiber Bragg grating of the modular elastic substrate through the optical cable. While ensuring that the air pressures of the static level, the water storage tank and the external environment are the same, the ventilation pipe and the ventilation diaphragm prevent dust from entering and isolate the volatilization of moisture. Mounting plates of the mounting seat are fixedly installed on the outer walls of the static level and the water storage tank, and the relative positions of the mounting plate and the sliding mounting seat can be adjusted. The sliding mounting seat can be fixed at the specified position required for monitoring. Initially install a plurality of static levels and water storage tanks at the planned positions. By adjusting the relative positions of the mounting plate of the mounting seat and the sliding mounting seat, ensure that all the liquid reaches the marked positions. The water storage tank ensures that the water level remains unchanged through water level control technical measures. When settlement changes occur in a plurality of static levels, the water level changes, driving the hollow float to move up and down. The transmission slide plate of the hollow float drives the conduction connecting rod to rotate around the connecting rod shaft. The second taper of the conduction connecting rod drives the modular elastic substrate to deform. The modular temperature compensation substrate and the modular elastic substrate are made of special glass solid-state encapsulation. The fiber Bragg grating is tightly combined with the elastic substrate, having the advantages of long life, oxidation resistance, fatigue resistance and not easy to disconnect. They are all replaceable modules and can distinguish micro deformations at the pm level. The modular temperature compensation substrate measures the ambient temperature at the installation position while performing temperature compensation and correction, ensuring that the detection data is not affected by temperature. The substrate is externally connected to a fiber Bragg grating demodulator through an optical fiber. The demodulator can distinguish the central wavelength changes of the reflected light in the fiber Bragg grating sensitive element and the temperature compensation grating, and then calculate the wavelength change of the fiber Bragg grating sensitive element and eliminate the influence of temperature on the sensitive element. After the sensor is processed, the settlement change amount and the temperature change amount are calibrated and a fitting curve is generated. Record the starting wavelength amount and the ambient temperature after installation. For subsequent measurements, the settlement change amount can be obtained by substituting the measured values into the fitting formula, and there is no zero drift phenomenon. The waterproof joint is used for locking, fixing and sealing. All transmission and measuring components are made of inorganic materials, having the advantages of anti-electromagnetic interference, super long life and long-term detection.

[0042] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be covered within the protection scope of the present utility model; those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A fiber grating substrate type static level device, characterized in that: The invention comprises a plurality of static level gauges (1), a plurality of water storage tanks (2), a plurality of connecting water pipes (3) and a plurality of mounting seats (4); the plurality of mounting seats (4) are fixed at planned positions of the settlement surface of the structure, a static level gauge (1) and a water storage tank (2) are both mounted on a mounting seat (4), and a static level gauge (1) is connected to a water storage tank (2) via a connecting water pipe (3); The static level (1) comprises a cylindrical monitoring housing (101), a first waterproof rain cap (102), a vent pipe (103), a vent membrane (104), a limit screw group (105), a hollow float (106), a conductive connecting rod (107), a connecting rod shaft (108), a modular elastic substrate (109), a modular temperature compensation substrate (110), a substrate mounting seat (111), a substrate pressing plate (112), a plurality of first bolts (113), a plurality of second bolts (114), a plurality of waterproof joints (115) and an optical cable (116); The bottom of the monitoring housing (101) is provided with a plurality of first threaded holes (101-1) for installing a waterproof joint (115) and a plurality of the limiting screw groups (105); the waterproof joint (115) passes through one end of the connecting water pipe (3); the other end of the connecting water pipe (3) is connected to the water storage tank (2); both ends of the first screw (1051) of the limiting screw group (105) are provided with a first external thread (1051-1); a nut (1052) is installed on the first external thread (1051-1); the first screw (1051) passes through the hollow float (106); and the hollow float (106) is installed between two of the nuts (1052) to limit its upper and lower movement limit; the hollow float The float (106) is a cylindrical structure, and its axial surface is provided with a plurality of sealed first through holes (106-1), and the plurality of sealed first through holes (106-1) are used to pass the first screw rod (1051); two square support seats (106-2) are symmetrically arranged on the hollow float (106), and a transmission slide plate (106-3) is arranged on each of the two support seats (106-2), and the transmission slide plate (106-3) is a plate-like structure, and its thickness is the same as that of the modular elastic substrate (109); the transmission slide plate (106-3) is embedded in the first pointed cone (107-1) at one end of the conductive connecting rod (107); a special-shaped circular hole is arranged in the first pointed cone (107-1), which is used as an optical fiber activity space of the optical cable (116); The conductive connecting rod (107) is provided with a second through hole (107-2) for passing the connecting rod shaft (108) and sliding around the connecting rod shaft (108); the side of the monitoring housing (101) is provided with a plurality of second threaded holes (101-2) for fixing the connecting rod shaft (108); the second pointed cone (107-3) at the other end of the conductive connecting rod (107) is in sliding contact with the modular elastic substrate (109), and the modular elastic substrate (109) is a flexible elastic material; when the water level in the monitoring housing (101) changes, the hollow float (106) moves up and down, driving the conductive connecting rod (107) to rotate, and the conductive connecting rod (107) drives the modular elastic substrate (109) to bend in proportion; the wavelength change of the optical fiber grating on the modular elastic substrate (109) is transmitted through the optical cable (116), and the settlement data of each point on the settlement surface of the structure can be obtained; The side of the monitoring housing (101) is also provided with a third threaded hole (101-3) and a third through hole (101-4); the third threaded hole (101-3) is also used to install a waterproof joint (115); the waterproof joint (115) is used to fix and seal the optical cable (116); the monitoring housing (101) is provided with a plurality of third through holes (101-4) for installing a plurality of first bolts (113); the first bolts (113) pass through the third through holes (101-4) and engage with fourth threaded holes (111-1) provided on the substrate mounting seat (111), thereby fixing the substrate mounting seat (111) to the inner wall of the monitoring housing (101). ; The substrate mounting seat (111) is a block-shaped structure, fixed on the inner wall surface of the monitoring housing (101), and the substrate mounting seat (111) is provided with a fifth threaded hole; the substrate pressing plate (112) is a plate-shaped structure, and the substrate pressing plate (112) is provided with a plurality of fifth through holes for passing the second bolts (114); the second bolts (114) respectively pass through the substrate pressing plate (112), the modular elastic substrate (109), the temperature compensation substrate (110), and the modular elastic substrate (109) to engage with the fifth threaded holes; a first circular groove (101-6) is provided at a predetermined position on the inner wall of the monitoring housing (101) as a liquid level mark; The first waterproof rain cap (102) is a conical umbrella-shaped structure, and is located above the monitoring housing (101); the ventilation pipe (103) is connected to the side of the first waterproof rain cap (102); the ventilation pipe (103) is a J-shaped tubular structure, and the ventilation diaphragm (104) is installed at the end of the ventilation pipe (103).

2. The fiber grating substrate type static level device according to claim 1, characterized in that: The water storage tank (2) comprises a cylindrical water storage shell (201) and a second waterproof rain cap (202) located on the water storage shell (201); a plurality of sixth threaded holes (201-1) are arranged at the bottom of the water storage shell (201), which are also used to install a waterproof joint (115); the waterproof joint (115) is connected to and seals the end of a connecting water pipe (3) near the water storage shell (201); a second internal thread (201-2) is arranged on the side surface of the opening of the water storage shell (201), which is used to mesh with the second external thread of the second waterproof rain cap (202); and a second circular groove (201-3) is arranged on the inner wall of the water storage shell (201) as a liquid level mark of the water storage tank (2).

3. The fiber grating substrate type static level device according to claim 2, characterized in that: The mounting seat (4) comprises a connecting plate (401) and a sliding mounting seat (402); the sliding mounting seat (402) is fixed at a planned position of the settlement surface of the structure; the connecting plate (401) is slidably connected to the sliding mounting seat (402); and one side of the connecting plate (401) is also connected to a water storage shell (201) or a monitoring shell (101).

4. The fiber grating substrate type static level device according to claim 3, characterized in that: The conductive connecting rod (107) is a notched plate-shaped structure, the first pointed cone (107-1) and the second pointed cone (107-3) are both provided with a triangular pointed structure, and an anisotropic hole (107-4) is provided along the outer shape of the second pointed cone (107-3) to reserve a deformation space for the modular elastic substrate (109).

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