A tunnel protection door status monitoring system based on sound recognition

Abstract

The present invention discloses a tunnel protection door status monitoring system based on sound recognition, belonging to the field. It includes an optical fiber probe, an output optical fiber, an optical fiber main line, a signal processing component, and a voice judgment database corresponding to the tunnel protection door. By the matching operation of each component, it can real-time feedback the vibration situation after the tunnel protection door is set, and judge the real-time state of the tunnel protection door, realizing the real-time monitoring of the tunnel protection door. The tunnel protection door status monitoring system of the present invention works based on the acquisition and processing of sound signals, with a simple structure and convenient setting. It can effectively realize the monitoring of the vibration state of the tunnel protection door in various states, realize the real-time monitoring during the application of the tunnel protection door, improve the continuity and accuracy of the tunnel protection door monitoring, and provide the possibility of early judgment and early maintenance for the possible abnormal situations of the tunnel protection door, fully ensuring the operation safety of the tunnel, and having good application prospects and promotion value.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel protection door monitoring, and particularly relates to a tunnel protection door status monitoring system based on sound recognition. Background Art

[0002] With the continuous development of rail transit construction in China, as the most important part of rail transit, tunnels have also shown a blowout development. In railway tunnels, chambers are often set up, and protection doors are set up in the chambers to separate the cross passages, evacuation passages from the vehicle tunnel as a fire separation measure. At the same time, when a train runs through the tunnel, due to the large ratio of the cross-sectional area of the train to the cross-sectional area of the tunnel, the long length of the tunnel, and the high running speed of the train, a large lateral wind pressure will be generated in the tunnel, forming a "piston effect", which will pose a potential damage to the communication, signal, and power equipment stored in the tunnel. At this time, the setting of the tunnel protection door plays a crucial role in disaster prevention and equipment storage.

[0003] Due to the long-term influence of "piston wind" during the use of the tunnel protection door, it is subjected to the vibration caused by long-term air pressure change. In this case, problems such as loosening and decreased sealing performance are likely to occur in the tunnel protection door, losing its original protection function. In extreme cases, the tunnel protection door may fall to the track area due to loosening and falling off, causing potential safety hazards during the operation of the tunnel and even triggering serious operation safety accidents.

[0004] In view of this, when actually setting the tunnel protection door, it is often necessary to regularly detect the setting status of the tunnel protection door or monitor the status of the tunnel protection door in real time. In traditional applications, the status of the protection door is often detected by manual regular inspections. Although this method can meet the detection requirements to a certain extent, due to the unpredictability of the occurrence of problems such as the falling off and toppling of the tunnel protection door, regular detection cannot accurately determine whether there are problems with the setting of the tunnel protection door, which has certain limitations. Moreover, manual detection also correspondingly increases the labor cost of the detection personnel and may pose a potential safety hazard to the personal safety of the detection personnel.

[0005] Although in the prior art, there are also ways to detect the status of tunnel protection doors by setting monitoring devices or detachment alarm devices corresponding to the tunnel protection doors. For example, a vibration monitoring system for tunnel protection doors combining optoelectronics proposed in the existing patent document CN109682456A and a detachment alarm device for tunnel protection doors proposed in the existing patent document CN108122367A. Among them, the former judges the setting status of the tunnel protection door by monitoring the vibration status of each tunnel protection door. This setting form is easily interfered by other vibrations and causes misjudgment, and it cannot alarm the situation after the protection door falls off; while the latter can monitor the situation when the tunnel protection door falls off and determine the position where the protection door falls off by setting distributed optical fiber sensors on the tunnel protection door. However, this structure can only monitor the status when the protection door falls off and cannot monitor the normal status of the protection door in real time, let alone prevent and give an early warning of the detachment of the protection door. Therefore, there are also certain limitations. Summary of the Invention

[0006] In view of one or more of the above defects or improvement requirements of the prior art, the present invention provides a tunnel protection door status monitoring system based on sound recognition, which can effectively realize the real-time monitoring of the vibration status after the protection door is set, and can detect in real time the statuses such as the protection door being about to fall off, falling and toppling, and toppling to the track area, so as to ensure the stability, reliability and safety of the application of the protection door, and ensure the safety and efficiency of tunnel operation.

[0007] To achieve the above object, the present invention provides a tunnel protection door status monitoring system based on sound recognition, which is characterized in that it includes:

[0008] An optical fiber probe, at least one of the optical fiber probes is arranged beside or on the top of the installation opening of the tunnel protection door, and is used for collecting in real time the sound signals generated by the tunnel protection door due to vibration, lodging or falling, and modulating and coupling them with optical signals to form an acousto-optic coupling signal;

[0009] An output optical fiber, the output optical fiber is correspondingly connected to the optical fiber probe, and is used for transmitting the acousto-optic coupling signal;

[0010] An optical fiber main line, the optical fiber main line is arranged in the tunnel and is used for connecting each output optical fiber and transmitting the acousto-optic coupling signal;

[0011] A signal processing component, the signal processing component includes a photoelectric converter and a sound signal processing component that are electrically connected in sequence; the photoelectric converter is correspondingly connected to the optical fiber main line and the sound signal processing component respectively, and is used for performing photoelectric conversion on each acousto-optic coupling signal in the optical fiber main line and transmitting the signal after photoelectric conversion to the sound signal processing component, where the amplification, impurity removal, noise reduction and compensation of the sound signal are realized;

[0012] A voice judgment database, which is electrically connected to the sound signal processing component, is used to store the sound signals in various vibration states of the tunnel protection door, receive the sound signals processed by the sound signal processing component, and realize the comparison and judgment between the collected sound signals and the preset sound signals, so as to monitor the real-time state of the tunnel protection door.

[0013] As a further improvement of the present invention, the optical fiber probe includes a bottom plate, a protective cover, a housing, a reflective film, a gasket, an FC adapter, a measurement optical fiber, an optical fiber coupler, and a light source;

[0014] The housing is installed on the bottom plate for installing the gasket; the gasket is made of a light-transmitting material, the reflective film is arranged on one side end face thereof, and the other side of the gasket is connected to one end of the measurement optical fiber through the FC adapter, and the other end of the measurement optical fiber is connected to the optical fiber coupler; the optical fiber coupler has three interfaces to be respectively connected to the measurement optical fiber, the output optical fiber, and the light source; the light source is a permanent light source for continuously generating optical signals and transmitting them to the measurement optical fiber; the protective cover is fixed on the bottom plate with its opening side for encapsulating each component in the protective cover, and a plurality of through holes are opened on the cover body of the protective cover corresponding to the housing for the sound signals to enter the protective cover and act on the reflective film.

[0015] As a further improvement of the present invention, at least one of the above-mentioned optical fiber probes, namely a ground optical fiber probe, is arranged on the ground between the installation opening of the tunnel protection door and the track area for collecting the sound signals generated when the tunnel protection door falls off and topples down.

[0016] As a further improvement of the present invention, the ground optical fiber probe is arranged on the set cross-section of the tunnel protection door and / or any side of the set cross-section.

[0017] As a further improvement of the present invention, at least one of the above-mentioned optical fiber probes, namely a track optical fiber probe, is arranged on the track area corresponding to the tunnel protection door for collecting the sound signals generated when the tunnel protection door falls onto the track area.

[0018] As a further improvement of the present invention, the track optical fiber probe is arranged on the set cross-section of the tunnel protection door and / or any side of the set cross-section.

[0019] As a further improvement of the present invention, the sound signal processing component includes a differential amplifier, a low-pass filter, a first mode remover, an integrating amplifier, a high-pass filter, and a second mode remover that are electrically connected in sequence; the differential amplifier is electrically connected to the photoelectric converter, and the second mode remover is correspondingly connected to the voice judgment database.

[0020] As a further improvement of the present invention, the reflective film is made by coating a polyester film.

[0021] As a further improvement of the present invention, the light source is an LED light source.

[0022] As a further improvement of the present invention, a partition board is provided corresponding to the bottom plate; the partition board can be correspondingly installed on the tunnel floor or wall surface, and is arranged at a certain distance from the bottom plate, and the two plates are connected by a plurality of mounting bolts, and springs are sleeved on the outer periphery of the mounting bolts between the two plates.

[0023] As long as the above-mentioned improved technical features do not conflict with each other, they can be combined with each other.

[0024] Generally speaking, compared with the prior art by the above technical solution conceived by the present invention, the following beneficial effects are obtained:

[0025] (1) The tunnel protection door state monitoring system based on sound recognition of the present invention includes an optical fiber probe, an output optical fiber, an optical fiber main line, a signal processing component, and a voice judgment database provided corresponding to the tunnel protection door. By using the corresponding setting of the optical fiber probe and the real-time collection, transmission, processing, and judgment of the sound signal, the vibration condition after the tunnel protection door is set can be fed back in real time, and the sound signal corresponding to the vibration state is compared with the preset voice signal in the voice judgment database for judgment, so as to judge the real-time state of the tunnel protection door, thereby realizing the real-time monitoring of the tunnel protection door, preventing and diagnosing possible extreme abnormal states in advance, and ensuring the reliable setting of the tunnel protection door and the safe operation of the tunnel.

[0026] (2) The tunnel protection door state monitoring system based on sound recognition of the present invention, by preferably designing the structural form of the optical fiber probe and using the corresponding setting of components such as a reflective film, a gasket, an FC adapter, a measuring optical fiber, an optical fiber coupler, and a light source, can receive the vibration sound signal of the tunnel protection door at the position where the optical fiber probe is set in real time, realize the input of the sound signal and the modulation, coupling, and output of the sound signal and the optical signal; and through the corresponding setting of the protective cover and the bottom plate, the stability and reliability of the setting of each component are ensured, the efficiency of sound signal collection is improved, and the accuracy of monitoring is ensured.

[0027] (3) The tunnel protection door state monitoring system based on sound recognition of the present invention, by arranging an isolation component composed of a partition board, a spring, and a mounting bolt on the optical fiber probe, can effectively realize the contact between the core components of the optical fiber probe and the set wall surface and ground, avoid the damage of the optical fiber probe caused by water passing through the wall surface and water accumulation on the ground, extend the service life of the optical fiber probe, and ensure the reliability and stability of the setting of the optical fiber probe.

[0028] (4) The tunnel protection door status monitoring system based on sound recognition of the present invention respectively sets optical fiber probes on the corresponding tunnel side walls around the tunnel protection door, on the ground between the installation doorway and the track area, and on the bottom surface of the track area, and can accurately monitor the vibration sound signals when the tunnel protection door is connected, falls and lies down, and drops into the track area respectively, realizing status monitoring in different states, with high monitoring accuracy and comprehensiveness, and further improving the safety and reliability of the tunnel protection door setting;

[0029] (5) The tunnel protection door status monitoring system based on sound recognition of the present invention has a simple structure and is easy to set up. It can effectively monitor the vibration status of the tunnel protection door in various states after being set in the tunnel, realize real-time monitoring of states such as the tunnel protection door being set and connected properly, the door body connection being loose, the door body connection falling off, the door body lying down, and the door body dropping into the track area, improving the continuity and accuracy of the tunnel protection door monitoring, and providing the possibility of early judgment and early maintenance for possible abnormal situations of the tunnel protection door, fully ensuring the operation safety of the tunnel, and having good application prospects and promotion value. Description of the Drawings

[0030] Figure 1 is the layout structure schematic diagram of the tunnel protection door status monitoring system based on sound recognition in the embodiment of the present invention;

[0031] Figure 2 is the structure schematic diagram of the optical fiber probe of the tunnel protection door status monitoring system in the embodiment of the present invention;

[0032] Figure 3 is the setting schematic diagram of the optical fiber splitter and the optoelectronic converter of the tunnel protection door status monitoring system in the embodiment of the present invention;

[0033] Figure 4 is the working principle schematic diagram of the tunnel protection door status monitoring system in the embodiment of the present invention;

[0034] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0035] 1. Optical fiber probe, 101. Protective cover, 102. Housing, 103. Reflective film, 104. Gasket, 105. FC adapter, 106. Measuring optical fiber, 107. Optical fiber coupler, 108. Light source, 109. Output optical fiber, 110. Isolation board, 111. Installation bolt, 112. Spring;

[0036] 2. First connecting optical fiber; 3. Second connecting optical fiber; 4. Third connecting optical fiber; 5. Optical fiber main line; 6. Optical fiber splitter; 7. Optoelectronic converter. Detailed Embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0042] Example:

[0043] The tunnel protection door status monitoring system based on sound recognition in the preferred embodiment of the present invention is as follows Figure 1 As shown in . It includes at least one optical fiber probe 1 corresponding to the setting position of the protection door. Specifically, the aforementioned at least one optical fiber probe 1 is set on both sides or the top of the door frame of the tunnel protection door, and is used to monitor the vibration of the tunnel protection door in real time. In actual settings, the optical fiber probe 1 set on the periphery of the protection door is recorded as the first optical fiber probe, and its setting position is preferably one side of the tunnel protection door, and the number of settings is preferably one, such as Figure 1 as shown in .

[0044] Furthermore, at least one fiber optic probe 1 is also provided on the bottom surface of one side of the tunnel protection door, which is referred to as the second fiber optic probe. Specifically, the second fiber optic probe is provided on the ground between the tunnel protection door and the track area, so as to detect the sound emitted when the protection door falls, and then feed back the above state to the control center. At the same time, the second fiber optic probe is preferably provided away from the area where the protection door touches the ground after rotating with the bottom edge as the axis, so as to avoid damage to the second fiber optic probe after the tunnel protection door falls. Of course, the second fiber optic probe can also be provided in the corresponding ground area after the tunnel protection door falls as needed, so that the tunnel protection door just falls on the second fiber optic probe to improve the accuracy of sound signal collection. At this time, it is necessary to preferably set the structure of the fiber optic probe to prevent damage due to the fall of the tunnel protection door.

[0045] Further preferably, at least one fiber optic probe 1 is provided in the track area of the tunnel, which is referred to as the third fiber optic probe, and is preferably provided on the cross section where the tunnel protection door is provided or within a certain distance on both sides of the cross section, preferably within ±1.5m. In a preferred embodiment, the third fiber optic probe is provided in three pieces, namely, one on the cross section where the tunnel protection door is provided and two on both sides of the cross section where the tunnel protection door is provided. Of course, the third fiber optic probe should be provided in a position to avoid being scratched by the train, and its connecting line should be pre-buried to avoid affecting it and related lines when the train is running. By providing the third fiber optic probe, when the protection door falls into the track area, it can be monitored by the third fiber optic probe in the first time, and then maintenance personnel can be arranged to perform maintenance on it immediately to avoid running accidents when the train is running in the tunnel.

[0046] In actual setting, the structure of the optical fiber probe 1 based on sound recognition is as follows Figure 2As shown in the figure, it includes a protective cover 101, a housing 102, a reflective film 103, a gasket 104, an FC adapter 105, a measurement optical fiber 106, an optical fiber coupler 107, a light source 108, an output optical fiber 109, a separator plate 110, mounting bolts 111 and springs 112. Among them, the protective cover 101 is arranged on a bottom plate in a plate-like structure, used to encapsulate the relevant components for monitoring and prevent the relevant structures inside the protective cover 101 from being damaged by flying sand and stones generated due to the high-speed running of the train. At the same time, a plurality of round holes are spaced apart on the protective cover 101, so that sounds above a certain sound wave frequency can be transmitted into the protective cover 101. Secondly, the protective cover is preferably made of sound-absorbing material, which can increase the receiving efficiency of the optical fiber probe 1 for sound signals. In addition, a separator plate 110 is preferably provided corresponding to the bottom plate. It is preferably arranged at a certain distance relative to the bottom plate, connected to the bottom plate through mounting bolts 111, and springs 112 are sleeved on the outer periphery of the mounting bolts 111 between the two plates for buffering when the bottom plate vibrates, and the separator plate 110 can be installed on the corresponding wall or ground through the mounting bolts 111.

[0047] Furthermore, the housing 102 is arranged inside the protective cover 101 and is fixedly arranged on the bottom plate correspondingly, used for fixing components such as the reflective film 103, the gasket 104, and the FC adapter 105. Among them, the reflective film 103 is a very thin polyester film arranged on the gasket 104 in the form of a coating, and the gasket 104 is fixed on the housing 102, as Figure 2 shown in the figure. Specifically, the reflective film 103 in the optical fiber probe 1 is an elastic diaphragm, which will undergo forced vibration under the influence of external sound waves, and then can modulate the optical signal reflected on the reflective film 103, so as to transmit the sound signal into the measurement optical fiber 106.

[0048] Furthermore, the gasket 104 is made of a light-transmitting material. The side of the gasket 104 facing away from the reflective film 103 is connected to the measurement optical fiber 106 through the FC adapter 105, so that the optical signal in the measurement optical fiber can be transmitted to the gasket 104 and reflected back into the measurement optical fiber by the reflective film 103. Correspondingly, the other end of the measurement optical fiber 106 facing away from the gasket 104 is correspondingly connected to the optical fiber coupler 107, where the splitting and combining of the optical signal are realized, and the optical signal is modulated. In a preferred embodiment, the optical fiber coupler 107 is a Y-shaped fused biconical taper coupler.

[0049] Furthermore, a light source 108 is provided corresponding to the optical fiber coupler 107, used to generate an optical signal and transmit it to the measurement optical fiber 106. In a preferred embodiment, the light source 108 is a permanent light source, continuously generating an optical signal and emitting it into the measurement optical fiber 106. Further preferably, the light source 108 is an LED light source.

[0050] Meanwhile, an output optical fiber 109 is also provided corresponding to the optical fiber coupler 107, which is used to transport the optical signal carrying voice information output from the optical fiber coupler 107 to the optoelectronic converter 7, and realize the conversion between the optical signal and the electrical signal in the optoelectronic converter 7. Specifically, an optical fiber main line 5 and an optical fiber splitter 6 are provided between each output optical fiber 109 and the optoelectronic converter 7. One end of each output optical fiber 109 is connected to the corresponding optical fiber probe 1, and the other end is respectively connected to the optical fiber splitter 6. At the same time, the optical fiber splitter 6 is connected to the optoelectronic converter 7 through the optical fiber main line 5, which is used to respectively transmit the signals in each output optical fiber 109 to the optoelectronic converter 7, and then respectively complete the conversion between the optical signal and the electrical signal. In addition, when the tunnel is opened, there are often multiple tunnel protection doors in the tunnel, such as Figure 3 as shown in the figure. At this time, the optical fiber probes 1 corresponding to each tunnel protection door can be connected to the optical fiber splitter 6 through the output optical fiber 109.

[0051] In addition, as Figure 4 shown in the figure, the monitoring system further includes a differential amplifier, a low-pass filter, a first mode remover, an integrating amplifier, a high-pass filter, and a second mode remover that are arranged in sequence, and each component is electrically connected. Among them, the voice signal is amplified by the differential amplifier after optoelectronic conversion. Correspondingly, the noise signal in the voice signal is also amplified at the same time, and the amplified voice signal enters the low-pass filter, and the voice signal below the set frequency is filtered here. When something abnormal occurs to the tunnel protection door, such as loose connection, unlocking, falling off, overturning, etc., it often generates an acoustic signal with a relatively high frequency. Therefore, when actually collecting the signal, only the acoustic signal above a specific frequency needs to be collected, which is the reason for setting the low-pass filter.

[0052] Furthermore, the filtered voice signal is transmitted to the first mode remover, and the noise signal in the voice signal is removed here to ensure that only the core light can reach the integrating amplifier. The voice signal reaching the integrating amplifier completes phase compensation in the integrating amplifier, and then the processed voice signal is transported to the high-pass filter, where the high-frequency band noise is filtered out. After that, the voice signal is transmitted to the second mode remover, where the core light introduced by the integrating amplifier and the high-pass filter is removed to ensure the accuracy of the monitoring signal.

[0053] The sound signal that has completed the above processing process can be transmitted to the voice judgment database, where the sound signal is compared to determine the vibration state corresponding to the sound signal. When setting up the monitoring system, the normal vibration sound signal of the tunnel protection door, the vibration sound signal when the connection is loose, the vibration sound signal when it falls off and topples, and the vibration sound signal when the train passes through can be collected and pre-stored in the voice judgment database in advance for real-time comparison with the processed sound signal. Once the collected sound signal indicates that the state of the tunnel protection door is abnormal, an alarm will be issued in a timely manner to remind the relevant staff to take corresponding measures.

[0054] In the tunnel protection door state monitoring system based on sound recognition in the present invention, by correspondingly arranging optical fiber probes on the side wall surface of the tunnel, on the ground between the protection door and the track area, and in the track area, and preferably setting the structure of the optical fiber probes, the optical fiber probes at each position can collect the sound signals in the tunnel, modulate and couple them with optical signals, and then perform relevant processing in sequence to remove impurities and noise, and then screen out the sound signals corresponding to the acoustic frequencies, and compare them with the preset sound signals in the voice judgment database, so as to correspondingly realize the judgment of the state of the protection door, thereby realizing the real-time monitoring of the state of the tunnel protection door, avoiding the loosening, falling off, toppling and intrusion into the track area of the tunnel protection door, ensuring the safety and reliability of tunnel operation, and having good application prospects and popularization value.

[0055] It is easy for those skilled in the art to understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tunnel protection door status monitoring system based on sound recognition, characterized in that, Including: Optical fiber probes, at least one of which is arranged beside or at the top of the installation opening of the tunnel protection door, and is used to collect the sound signals generated by the vibration, toppling or falling of the tunnel protection door in real time, and modulate and couple them with optical signals to form acousto-optic coupled signals; and at least one of the optical fiber probes, namely the ground optical fiber probe, is arranged on the ground between the installation opening of the tunnel protection door and the track area to collect the sound signals generated when the tunnel protection door falls off and topples; and at least one of the optical fiber probes, namely the track optical fiber probe, is arranged on the track area corresponding to the tunnel protection door to collect the sound signals generated when the tunnel protection door falls onto the track area; Output optical fibers, which are correspondingly connected to the optical fiber probes and are used for transmitting the acousto-optic coupled signals; Optical fiber main lines, which are arranged in the tunnel and are used for connecting the output optical fibers and transmitting the acousto-optic coupled signals; Signal processing components, which include a photoelectric converter and a sound signal processing component that are electrically connected in sequence; The photoelectric converter is correspondingly connected to the optical fiber main line and the sound signal processing component respectively, and is used for performing photoelectric conversion on each acousto-optic coupled signal in the optical fiber main line and transmitting the signals after photoelectric conversion to the sound signal processing component, where the amplification, impurity removal, noise reduction and compensation of the sound signals are realized; Voice judgment database, which is electrically connected to the sound signal processing component, is used for storing the sound signals in various vibration states of the tunnel protection door, receiving the sound signals after being processed by the sound signal processing component, and realizing the comparison and judgment between the collected sound signals and the preset sound signals, so as to realize the real-time state monitoring of the tunnel protection door; The optical fiber probe includes a bottom plate, a protective cover, a shell, a reflective film, a gasket, an FC adapter, a measurement optical fiber, an optical fiber coupler and a light source; the shell is installed on the bottom plate and is used for installing the gasket; the gasket is made of a light-transmitting material, the reflective film is arranged on one side end surface thereof, and the other side of the gasket is connected to one end of the measurement optical fiber through the FC adapter, and the other end of the measurement optical fiber is connected to the optical fiber coupler; the optical fiber coupler has three interfaces to be respectively connected to the measurement optical fiber, the output optical fiber and the light source; the light source is a permanent light source and is used for continuously generating optical signals and transmitting them to the measurement optical fiber; the protective cover is fixed on the bottom plate with its opening side and is used for encapsulating each component in the protective cover, and a plurality of through holes are opened on the cover body corresponding to the shell for the sound signals to enter the protective cover and act on the reflective film; An isolation plate is provided corresponding to the bottom plate; the isolation plate can be correspondingly installed on the tunnel ground or wall surface, and is arranged at a certain distance from the bottom plate, and the two plates are connected by several mounting bolts, and springs are sleeved on the outer peripheries of the mounting bolts between the two plates.

2. The tunnel protection door status monitoring system based on voice recognition according to claim 1, wherein, The ground optical fiber probe is arranged on the set cross-section of the tunnel protection door and / or on any side of the set cross-section.

3. The tunnel protection door status monitoring system based on voice recognition according to claim 1, wherein, The rail-mounted optical fiber probe is arranged on the set cross-section of the tunnel protection door and / or on any side of the set cross-section.

4. The tunnel protection door status monitoring system based on voice recognition according to any one of claims 1 to 3, wherein, The sound signal processing component includes a differential amplifier, a low-pass filter, a first mode remover, an integrating amplifier, a high-pass filter, and a second mode remover that are electrically connected in sequence; the differential amplifier is electrically connected to the photoelectric converter, and the second mode remover is correspondingly connected to the voice judgment database.

5. The tunnel protection door status monitoring system based on voice recognition according to claim 2, wherein, The reflective film is made by coating a polyester film.

6. The tunnel protection door status monitoring system based on voice recognition according to claim 2, wherein The light source is an LED light source.

Images