Cascade type fiber bragg grating water level monitoring device

Abstract

The utility model discloses a cascade type fiber grating water level monitoring device which comprises a manual winch support, the manual winch support is connected with a manual winch with a self-locking function, the manual winch is connected with one end of a guide steel wire rope, and the other end of the guide steel wire rope is connected with a counterweight device. The surface of the guide steel wire rope is connected with multiple fiber grating probes; the device solves the problems that in the prior art, when the water level is too deep, precision is not high, maintenance is difficult, a device body is complex in structure, maintenance cost is high, and multi-point simultaneous monitoring is difficult to achieve; the water level monitoring device has the advantages of being simple in structure, convenient to install, low in maintenance cost and capable of effectively achieving high-precision water level monitoring within a large depth range.

Description

Technical Field

[0001] The utility model relates to the field of water level monitoring of high-head ship locks, in particular to a cascaded fiber Bragg grating water level monitoring device. Background Technique

[0002] With the rapid development of technology, water level monitoring technology has been continuously improved, and real-time monitoring and early warning of water levels have become increasingly important. In many fields such as water conservancy projects, flood control and disaster reduction, and environmental monitoring, accurate and timely monitoring of water levels is required. Traditional water level monitoring methods, such as float-type water level gauges and pressure-type water level gauges, can meet the monitoring requirements to a certain extent, but there are problems such as being easily affected by the environment, having low measurement accuracy when the water level exceeds 50m, and being difficult to maintain.

[0003] In recent years, fiber Bragg grating sensing technology has received extensive attention in the field of water level monitoring due to its advantages such as high sensitivity, high resolution, and anti-electromagnetic interference. Fiber Bragg grating sensors utilize the photosensitivity of optical fibers to sense changes in external physical quantities, such as temperature and stress, by measuring changes in the reflection wavelength of Bragg gratings in the optical fibers. However, most existing fiber Bragg grating water level monitoring devices have complex structures, high installation and maintenance costs, and are difficult to achieve multi-point simultaneous monitoring. Therefore, it is necessary to design a cascaded fiber Bragg grating water level monitoring device to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a cascaded fiber Bragg grating water level monitoring device, which solves the problems of low accuracy and difficult maintenance in the prior art when the water level is too deep, as well as the problems of complex structure of the device body, high maintenance cost, and difficulty in achieving multi-point simultaneous monitoring; it has the characteristics of simple structure, convenient installation, low maintenance cost, and can effectively achieve high-precision water level monitoring within a large depth range.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a cascaded fiber Bragg grating water level monitoring device, including a manual winch bracket, the manual winch bracket is connected to a manual winch with a self-locking function, the manual winch is connected to one end of a guiding steel wire rope, and the other end of the guiding steel wire rope is connected to a counterweight; a plurality of fiber Bragg grating probes are connected to the surface of the guiding steel wire rope.

[0006] Further, a self-locking mechanism is provided inside the winch of the manual winch. When the winch of the manual winch stops rotating, the self-locking mechanism can automatically lock to prevent the steel wire rope from moving due to external forces.

[0007] Further, a plurality of fiber Bragg grating probes are arranged at equal intervals, and the distance between adjacent two water level gauge sensing devices is 10m.

[0008] Preferably, the manual winch bracket is fixed to the supporting wall by bolts.

[0009] Furthermore, the wire rope is a corrosion-resistant and high-strength stainless steel wire rope with a length of 60 m and a diameter of 4 mm.

[0010] Furthermore, the manual winch bracket is made of high-strength steel and is firmly fixed to the supporting wall by bolts; the manual winch bracket is designed as a triangular structure to enhance stability.

[0011] Preferably, multiple fiber Bragg grating probes are electrically connected by optical fibers.

[0012] Furthermore, each fiber Bragg grating probe is internally encapsulated with a fiber Bragg grating sensor, which can accurately sense minute changes in water level.

[0013] Preferably, a clamp is connected to one side surface of the fiber Bragg grating probe, and the clamp is clamped to the guiding wire rope.

[0014] Furthermore, the clamp is made of stainless steel and is used to firmly fix the fiber Bragg grating probe on the wire rope to prevent it from sliding or falling off.

[0015] Furthermore, the optical fiber selected is a low-loss and high-transmission-efficiency optical fiber, which is used to transmit the signals of the fiber Bragg grating probe to the monitoring device.

[0016] The utility model has the following technical effects:

[0017] Through the cascaded distributed fiber Bragg grating probes, the device realizes high-precision monitoring of water level changes within 50 m, and has the advantages of simple structure, convenient installation and low maintenance cost. At the same time, through the design of the manual winch and the self-locking function, the device can work stably in harsh environments, improving the reliability and stability of water level monitoring. It not only overcomes the deficiencies of traditional water level monitoring methods, but also gives full play to the advantages of fiber Bragg grating sensing technology, providing a new and effective solution for high-precision water level monitoring within 50 m. Description of the Drawings

[0018] The following further explains the utility model in conjunction with the drawings and embodiments:

[0019] Figure 1 is the structural schematic diagram of the utility model;

[0020] Figure 2 is the structural schematic diagram of the fiber Bragg grating probe in the utility model;

[0021] Explanation of the reference numerals in the figure: manual winch bracket 1, manual winch 2, guiding wire rope 3, counterweight 4, fiber Bragg grating probe 5, clamp 6, optical fiber 7. Detailed Embodiments

[0022] As Figure 1As shown in the figure, a cascaded fiber Bragg grating water level monitoring device includes a manual winch bracket 1, which is connected to a manual winch 2 with a self-locking function. The manual winch 2 is connected to one end of a guiding steel wire rope 3, and the other end of the guiding steel wire rope 3 is connected to a counterweight 4. Multiple fiber Bragg grating probes 5 are connected to the surface of the guiding steel wire rope 3.

[0023] Further, a self-locking mechanism is provided inside the winch of the manual winch 2. When the winch of the manual winch 2 stops rotating, the self-locking mechanism can automatically lock to prevent the steel wire rope from moving due to external forces.

[0024] Further, multiple fiber Bragg grating probes 5 are arranged at equal intervals, and the distance between adjacent two water level gauge sensing devices is 10 m.

[0025] Preferably, the manual winch bracket 1 is fixed to the supporting wall by bolts.

[0026] Further, the steel wire rope is a corrosion-resistant and high-strength stainless steel wire rope, with a length of 60 m and a diameter of 4 mm.

[0027] Further, the manual winch bracket 1 is made of high-strength steel and is firmly fixed to the supporting wall by bolts. The manual winch bracket 1 is designed as a triangular structure to enhance stability.

[0028] Preferably, multiple fiber Bragg grating probes 5 are electrically connected through an optical fiber 7.

[0029] Further, each fiber Bragg grating probe 5 is internally encapsulated with an optical fiber 7 grating sensor, which can accurately sense minute changes in the water level.

[0030] As Figure 2 shown in the figure, a clamp 6 is connected to one side surface of the fiber Bragg grating probe 5, and the clamp 6 is clamped to the guiding steel wire rope 3.

[0031] Further, the clamp 6 is made of stainless steel and is used to firmly fix the fiber Bragg grating probe 5 on the steel wire rope to prevent it from sliding or falling off.

[0032] Further, the optical fiber 7 is selected as an optical fiber 7 with low loss and high transmission efficiency, which is used to transmit the signal of the fiber Bragg grating probe 5 to the monitoring device.

[0033] The working principle of the present utility model is as follows:

[0034] Fix the manual winch bracket 1 to the supporting wall with bolts to ensure it is stable and without shaking. Pass the guiding stainless steel wire rope through the manual winch 2 and adjust it to an appropriate length. Use the clamp 6 to fix each fiber Bragg grating probe 5 on the wire rope in a cascaded distribution manner, ensuring that the distance between each probe is 1 m and the probe can be completely immersed in water. Connect the optical fiber 7 to the fiber Bragg grating probe 5 and the monitoring device, and conduct debugging to ensure that each fiber Bragg grating probe 5 can work normally and the signal transmission is stable.

[0035] When in use, by rotating the manual winch 2, adjust the length of the wire rope, thereby changing the position of the fiber Bragg grating probe 5 to meet different water level monitoring requirements.

[0036] When the water level changes, the fiber Bragg grating probe 5 will sense the change and transmit the signal to the monitoring device through the optical fiber 7.

Claims

1. A cascaded fiber Bragg grating water level monitoring device, characterized in that: The manual winch bracket (1) is connected to a manual winch (2) with a self-locking function, the manual winch (2) is connected to one end of a guide wire rope (3), and the other end of the guide wire rope (3) is connected to a counterweight (4); a plurality of fiber optic grating probes (5) are connected to the surface of the guide wire rope (3).

2. The cascaded fiber Bragg grating water level monitoring device according to claim 1, characterized in that: The manual winch bracket (1) is fixed to the supporting wall by means of bolts.

3. The cascaded fiber Bragg grating water level monitoring device according to claim 1, characterized in that: The multiple fiber grating probes (5) are electrically connected via optical fibers.

4. The cascaded fiber Bragg grating water level monitoring device according to claim 1, characterized in that: A clamp (6) is connected to a surface of one side of the fiber optic Bragg grating probe (5), and the clamp (6) is clamped to the guide wire rope (3).

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