Automatic tunnel water leakage detection system and method based on fluorescence tracing technology

Abstract

The invention discloses an automatic tunnel water leakage detection system and method based on a fluorescence tracing technology, and the system comprises a microcapsule strip containing fluorescent materials of different colors, a guide rail, a near ultraviolet light emission module, an image collection module, a photoelectric signal post-amplification circuit, and a data collection module. When underground water enters the tunnel, microcapsules which are wound on the reinforcing steel bars and filled with fluorescent materials with different colors deform and break to release the fluorescent materials, the underground water carries the fluorescent materials to permeate the tunnel, the near ultraviolet light emitting module arranged on the guide rail emits near ultraviolet light, the fluorescent materials excite fluorescence, and the image acquisition module receives a fluorescence signal. Fluorescence signals are converted into electric signals and amplified through the photoelectric signal post-amplification circuit, the data acquisition module acquires the electric signals transmitted by the photoelectric signal post-amplification circuit, and fluorescence colors and fluorescence distribution are obtained through analysis, so that the tunnel water leakage position is judged, and the accuracy and efficiency of water leakage identification are remarkably improved.

Description

Technical Field

[0001] The invention relates to a tunnel water leakage detection system and method, and in particular to an automatic tunnel water leakage detection system and method based on fluorescent tracing technology. Background Art

[0002] my country's tunnel engineering is developing rapidly, with a large construction scale and facing more and more complex geological challenges. However, tunnel leakage has serious consequences, damaging the tunnel structure and affecting the service life of the tunnel. At present, the methods of tunnel leakage detection have certain limitations in terms of efficiency, coverage, identification accuracy and cost. In order to solve these problems and improve the efficiency and accuracy of leakage detection, a new technical means is urgently needed. Summary of the invention

[0003] In order to improve the efficiency, coverage and recognition accuracy of tunnel water leakage detection, the present invention provides a tunnel automatic water leakage detection system and method based on fluorescent tracing technology. During the tunnel construction process, the present invention uses fluorescent powders of different colors to mark different positions of the tunnel, and cooperates with automated detection equipment. If a tunnel leak occurs in the later stage, the leakage position can be quickly determined to shorten the response time and improve the system judgment accuracy.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] An automatic tunnel water leakage detection system based on fluorescent tracing technology includes a microcapsule strip filled with fluorescent materials of different colors, a guide rail, a near-ultraviolet light emission module, an image acquisition module, a photoelectric signal post-amplification circuit, and a data acquisition module, wherein:

[0006] The microcapsule strips containing fluorescent materials of different colors are wound around steel bars in different angle areas of the same cross section of the tunnel;

[0007] After the construction is completed, the guide rail is fixed in the tunnel at a position that does not affect the traffic and pedestrians in the tunnel;

[0008] The near-ultraviolet light emitting module is installed on the guide rail;

[0009] The image acquisition module and the photoelectric signal post-amplification circuit are integrated and installed on the guide rail;

[0010] The data acquisition module is installed on a mobile or fixed terminal;

[0011] After cracks appear in the tunnel, the microcapsules filled with fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel. The near-ultraviolet light emitting module installed on the guide rail emits near-ultraviolet light, and the fluorescent materials are stimulated to fluoresce. The image acquisition module receives the fluorescent signal, and converts the fluorescent signal into an electrical signal and amplifies it through the photoelectric signal post-amplification circuit. The data acquisition module collects the electrical signal transmitted by the photoelectric signal post-amplification circuit, and obtains the fluorescence color and fluorescence distribution through analysis, thereby determining the location of the tunnel leakage.

[0012] A method for automatic tunnel water leakage detection based on fluorescent tracing technology using the above system comprises the following steps:

[0013] Step S1, during the construction process, the tunnel is divided into three sections, A, B, and C, and microcapsule strips containing red, green, and blue fluorescent materials are buried respectively;

[0014] Step S2: After the construction is completed, the guide rail is installed, and the near-ultraviolet light emission module and the image acquisition module are installed on the guide rail. The two modules move independently along the guide rail to coordinately inspect the tunnel;

[0015] Step S3: After cracks appear in the tunnel, the microcapsules containing fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel and leaves traces of fluorescent powder. The colors of the fluorescent powder are different at different locations in the tunnel.

[0016] Step S4, the near-ultraviolet light emitting module irradiates the tunnel with a certain power and working time, and the fluorescent material in the tunnel excites fluorescence of different colors, and the image acquisition module and the photoelectric signal post-amplification circuit cooperate to collect the fluorescent signal, convert it into an electrical signal, and amplify it;

[0017] Step S5: The data acquisition module acquires the electrical signal transmitted by the photoelectric signal post-amplification circuit, obtains the fluorescence color and fluorescence distribution through analysis, and thus determines the location of the tunnel leakage.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The present invention introduces microcapsules filled with fluorescent powder into the tunnel structure layer. When the tunnel cracks and causes the microcapsules to rupture, the fluorescent powder in the microcapsules is released. If groundwater enters, the groundwater will carry the fluorescent powder into the tunnel. Under specific light, the fluorescent powder will fluoresce and be recognized by the camera of the inspection equipment, thereby significantly improving the accuracy and efficiency of water leakage identification and overcoming many deficiencies in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the tunnel automatic water leakage detection system based on fluorescent tracer technology. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be included in the protection scope of the present invention.

[0022] The present invention provides a tunnel automatic water leakage detection system based on fluorescent tracing technology, such as Figure 1 As shown, the system includes microcapsule strips filled with fluorescent materials of different colors, guide rails, near-ultraviolet light emission modules, image acquisition modules, photoelectric signal post-amplification circuits, and data acquisition modules, wherein:

[0023] The microcapsule strips containing fluorescent materials of different colors are wound around steel bars in different angle areas of the same cross section of the tunnel;

[0024] After the construction is completed, the guide rail is fixed in the tunnel at a position that does not affect the traffic and pedestrians in the tunnel;

[0025] The near-ultraviolet light emitting module is installed on the guide rail;

[0026] The image acquisition module and the photoelectric signal post-amplification circuit are integrated and installed on the guide rail;

[0027] The data acquisition module is installed on a mobile or fixed terminal.

[0028] The working principle of the above detection system is as follows: after cracks appear in the tunnel, the microcapsules filled with fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel. The near-ultraviolet light emitting module installed on the guide rail emits near-ultraviolet light, and the fluorescent materials are stimulated to fluoresce. The image acquisition module receives the fluorescent signal, and converts the fluorescent signal into an electrical signal and amplifies it through the photoelectric signal post-amplification circuit. The data acquisition module collects the electrical signal transmitted by the photoelectric signal post-amplification circuit, and obtains the fluorescence color and fluorescence distribution through subsequent analysis, thereby determining the location of the tunnel leakage.

[0029] In the present invention, the method for preparing the microcapsule strips containing fluorescent materials of different colors is as follows:

[0030] (1) Select LiLa2O2BO3:Sm 3+ ,Eu 3+ As a near-ultraviolet red fluorescent material;

[0031] (2) Select SrAl2O4:Eu 2+ As a near-ultraviolet green fluorescent material;

[0032] (3) Select LiSrPO4:Eu 2+ As a near-ultraviolet blue fluorescent material;

[0033] (4) using polyethylene to form a thin-walled, textured, unsealed microcapsule shell by blow molding;

[0034] (5) filling the above three fluorescent materials into microcapsules respectively and sealing them;

[0035] (6) Strips of microcapsule widths are made from red, green, and blue nonwoven fabrics, and binding strips are arranged at a certain interval. Capsules containing fluorescent materials of corresponding colors are bound and bonded to the nonwoven fabrics to obtain a plurality of strips of microcapsules containing red, green, and blue near-ultraviolet materials.

[0036] In the present invention, the specific method for determining the location of water leakage in the tunnel is as follows:

[0037] (1) If red fluorescence is found during the inspection, section A is leaking; if green fluorescence is found, section B is leaking; if blue fluorescence is found, section C is leaking;

[0038] (2) If the fluorescence appears at the bottom of the corresponding tunnel segment, the tunnel is leaking at the bottom; if the fluorescence appears at the side wall of the corresponding segment, the side wall is leaking; if the fluorescence appears at the top of the corresponding segment, the top is leaking.

[0039] A method for automatic tunnel water leakage detection based on fluorescent tracing technology using the above system comprises the following steps:

[0040] Step S1, during the construction process, the tunnel is divided into three sections, A, B, and C, and microcapsule strips containing red, green, and blue fluorescent materials are buried respectively, wherein the microcapsule strips containing fluorescent materials are wound and bonded to the surface of the steel bars and then concrete is poured.

[0041] In this step, the microcapsule strips should not be wrapped too densely on the surface of the steel bar to avoid affecting the bonding performance between the steel bar and concrete.

[0042] In this step, the microcapsule strips are wrapped around the longitudinal and transverse steel bar surfaces in the concrete through connecting tapes.

[0043] Step S2: After the construction is completed, the guide rail is installed, and the near-ultraviolet light emission module and the image acquisition module are installed on the guide rail. The two modules move independently along the guide rail to coordinately inspect the tunnel.

[0044] In this step, the guide rail installation position should ensure that the subsequent near-ultraviolet light emission module and image acquisition module have sufficient working space and do not affect the traffic and pedestrians in the tunnel.

[0045] In this step, the emission spectrum of the near-ultraviolet light emitting module should be wide to increase the fault tolerance of the system.

[0046] Step S3: After cracks appear in the tunnel, the microcapsules containing fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel and leaves traces of fluorescent powder. The colors of the fluorescent powder are different at different locations in the tunnel.

[0047] Step S4, the near-ultraviolet light emitting module irradiates the tunnel with a certain power and working time, and the fluorescent material in the tunnel stimulates fluorescence of different colors. The image acquisition module and the photoelectric signal post-amplification circuit cooperate to collect the fluorescent signal, convert it into an electrical signal and amplify it.

[0048] Step S5: The data acquisition module acquires the electrical signal transmitted by the photoelectric signal post-amplification circuit, and obtains the fluorescence color and fluorescence distribution through subsequent analysis, thereby determining the location of the tunnel leakage.

Claims

1. An automatic tunnel water leakage detection system based on fluorescent tracer technology, characterized in that The automatic tunnel water leakage detection system includes a microcapsule strip filled with fluorescent materials of different colors, a guide rail, a near-ultraviolet light emission module, an image acquisition module, a photoelectric signal post-amplification circuit, and a data acquisition module, wherein: The microcapsule strips containing fluorescent materials of different colors are wound around steel bars in different angle areas of the same cross section of the tunnel; After the construction is completed, the guide rail is fixed in the tunnel at a position that does not affect the traffic and pedestrians in the tunnel; The near-ultraviolet light emitting module is installed on the guide rail; The image acquisition module and the photoelectric signal post-amplification circuit are integrated and installed on the guide rail; The data acquisition module is installed on a mobile or fixed terminal; After cracks appear in the tunnel, the microcapsules filled with fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel. The near-ultraviolet light emitting module installed on the guide rail emits near-ultraviolet light, and the fluorescent materials are stimulated to fluoresce. The image acquisition module receives the fluorescent signal, and converts the fluorescent signal into an electrical signal and amplifies it through the photoelectric signal post-amplification circuit. The data acquisition module collects the electrical signal transmitted by the photoelectric signal post-amplification circuit, and obtains the fluorescence color and fluorescence distribution through analysis, thereby determining the location of the tunnel leakage.

2. The tunnel automatic water leakage detection system based on fluorescent tracer technology according to claim 1 is characterized in that The microcapsule strips filled with fluorescent materials of different colors are wound around the longitudinal and transverse steel bar surfaces in the concrete through connecting belts.

3. The tunnel automatic water leakage detection system based on fluorescent tracer technology according to claim 1 or 2 is characterized in that The method for making the microcapsule strips containing fluorescent materials of different colors is as follows: (1) Select LiLa2O2BO3:Sm 3+ ,Eu 3+ As a near-ultraviolet red fluorescent material; (2) Select SrAl2O4:Eu 2+ As a near-ultraviolet green fluorescent material; (3) Select LiSrPO4:Eu 2+ As a near-ultraviolet blue fluorescent material; (4) using polyethylene to form a thin-walled, textured, unsealed microcapsule shell by blow molding; (5) filling the above three fluorescent materials into microcapsules respectively and sealing them; (6) Strips of microcapsule widths are made from red, green, and blue nonwoven fabrics, and binding strips are arranged at a certain interval. Capsules containing fluorescent materials of corresponding colors are bound and bonded to the nonwoven fabrics to obtain a plurality of strips of microcapsules containing red, green, and blue near-ultraviolet materials.

4. The tunnel automatic water leakage detection system based on fluorescent tracer technology according to claim 3 is characterized in that The method for determining the location of water leakage in a tunnel is as follows: (1) If red fluorescence is found during the inspection, section A is leaking; if green fluorescence is found, section B is leaking; if blue fluorescence is found, section C is leaking; (2) If the fluorescence appears at the bottom of the corresponding tunnel segment, the tunnel bottom is leaking; if the fluorescence appears at the side wall of the corresponding segment, the side wall is leaking; if the fluorescence appears at the top of the corresponding segment, the top is leaking.

5. A method for automatic tunnel water leakage detection based on fluorescent tracer technology using the system according to any one of claims 1 to 4, characterized in that The method comprises the following steps: Step S1, during the construction process, the tunnel is divided into three sections, A, B, and C, and microcapsule strips containing red, green, and blue fluorescent materials are buried respectively; Step S2: After the construction is completed, the guide rail is installed, and the near-ultraviolet light emission module and the image acquisition module are installed on the guide rail. The two modules move independently along the guide rail to coordinately inspect the tunnel; Step S3: After cracks appear in the tunnel, the microcapsules containing fluorescent materials of different colors wrapped around the steel bars are deformed and ruptured, releasing the fluorescent materials. The groundwater carries the fluorescent materials into the tunnel and leaves traces of fluorescent powder. The colors of the fluorescent powder are different at different locations in the tunnel. Step S4, the near-ultraviolet light emitting module irradiates the tunnel with a certain power and working time, and the fluorescent material in the tunnel excites fluorescence of different colors, and the image acquisition module and the photoelectric signal post-amplification circuit cooperate to collect the fluorescent signal, convert it into an electrical signal, and amplify it; Step S5: The data acquisition module acquires the electrical signal transmitted by the photoelectric signal post-amplification circuit, obtains the fluorescence color and fluorescence distribution through analysis, and thus determines the location of the tunnel leakage.

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