Optical fiber pickup sensor and optical fiber sensing equipment

Abstract

The utility model provides an optical fiber pickup sensor and an optical fiber sensing device, and relates to the technical field of sound wave detection, and the optical fiber pickup sensor comprises a first housing which comprises an installation part which is configured to be connected to a bearing device; the first shell and the second shell are connected to form an accommodating cavity; wherein a containing cavity is formed in the first shell, a sensitization assembly separated from the first shell is arranged in the containing cavity, the sensitization assembly is arranged on the second shell, and the first shell and / or the second shell are / is provided with sound transmission holes. According to the optical fiber pickup sensor provided by the utility model, the mounting part is arranged on the first shell of the sensor main body, the optical fiber pickup sensor is fixed on the bearing equipment through the mounting part, and the second shell is arranged on the first shell; the sensitization assembly and the first shell are arranged at an interval and are arranged on the second shell, so that the vibration path can be prolonged, the vibration reduction effect is better, and the accuracy of the optical fiber pickup sensor is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sound wave detection, and in particular to an optical fiber sound pickup sensor and an optical fiber sensing device. Background Technology

[0002] A sound pickup sensor typically includes a spool with acoustically sensitive material (referred to herein as an amplification component) and an optical fiber coil wound around the amplification component. The amplification component can respond to local deformation in response to ambient sound waves, and the optical fiber signal transmitted from the optical fiber coil is correlated with the local deformation of the amplification component. Therefore, the sound pickup sensor can generate an optical fiber signal that responds to ambient sound waves.

[0003] In the industrial field, sound pickup sensors are often used to monitor the faults of conveyor belt rollers in conveying mechanisms, so as to eliminate the need for manual inspection of automated equipment and improve the monitoring efficiency and real-time performance of automated equipment.

[0004] Specifically, the conveying mechanism may include multiple conveyor belt rollers deployed along the conveying direction. The conveyor belt carried on the conveyor belt rollers can move along the conveying direction as the conveyor belt rollers rotate. In addition, multiple sound pickup sensors may be deployed in the conveying direction of the conveying mechanism to obtain sound wave information characterizing the vibration sound waves of the conveyor belt rollers using the fiber optic signals generated by each sound pickup sensor.

[0005] When the pickup sensor is directly mounted on the carrier equipment, the vibration of the carrier equipment is transmitted to the sensitizing component, which will affect the accuracy of the sensitizing component. Utility Model Content

[0006] The purpose of this invention is to provide an optical fiber pickup sensor and an optical fiber sensing device to alleviate the technical problem that the pickup sensor is greatly affected by the vibration of the supporting equipment, which affects the accuracy of the pickup sensor.

[0007] This utility model provides an optical fiber microphone sensor, including a sensor body, the sensor body comprising:

[0008] A first housing includes a mounting portion configured to be connected to a carrier device;

[0009] A second housing, wherein the first housing is connected to the second housing and forms a receiving cavity;

[0010] The cavity contains a sensitive enhancement component that is separated from the first housing. The sensitive enhancement component is provided with a second housing. The first housing and / or the second housing are provided with sound-permeable holes.

[0011] In an optional embodiment, the sensitizing component has a hollow acoustic cavity with a first opening facing the second housing, the second housing including the sound-transmitting hole communicating with the first opening.

[0012] In an optional embodiment, the second housing includes:

[0013] A frame having a second opening corresponding to a first opening, the frame being fixed to the first opening;

[0014] A protective cover is provided at the second opening, and the protective cover is provided with the sound-permeable hole.

[0015] In an optional embodiment, the inner wall of the second opening is provided with a support protrusion and an upper limit protrusion, the upper limit protrusion and the support protrusion cooperating to fix the protective cover.

[0016] In an optional embodiment, a vibration damping element is also included, and the sensitivity enhancement component is connected to the second housing via at least one of the vibration damping elements.

[0017] In an optional embodiment, the vibration damping element is a vibration damping retaining ring;

[0018] One of the sensitivity enhancement component and the vibration damping fixing ring is provided with a first snap-fit ​​protrusion, and the other is provided with a second fixing groove, wherein the first snap-fit ​​protrusion and the second fixing groove cooperate.

[0019] One of the vibration damping fixing ring and the second housing is provided with a second snap-fit ​​protrusion, and the other is provided with a first fixing groove, wherein the second snap-fit ​​protrusion cooperates with the first fixing groove.

[0020] In an optional embodiment, the first snap-fit ​​protrusion is disposed on the outer periphery of the sensitizing component, and the second fixing groove is disposed on the inner sidewall of the vibration damping fixing ring; the second snap-fit ​​protrusion is disposed on the inner side of the second housing, and the first fixing groove is disposed on the outer sidewall of the vibration damping fixing ring; and / or, the first fixing groove and the second fixing groove are respectively grooves extending circumferentially along the vibration damping fixing ring.

[0021] In an optional implementation, the sensitizing component is connected to the second housing only through one of the vibration damping elements.

[0022] In an optional embodiment, the sensitivity enhancement component includes a sensitivity enhancement cylinder and a frame. The sensitivity enhancement cylinder is sleeved on the frame, and the frame is disposed on the second housing. A hollow acoustic cavity is formed inside the frame, and the sidewalls of the frame are hollowed out. The sensitivity enhancement cylinder communicates with the hollow acoustic cavity. And / or, the fiber optic pickup sensor further includes an optical fiber and a protective tube. The first housing and / or the second housing are further provided with an assembly port, and the protective tube is assembled at the assembly port. The optical fiber is wound around the sensitivity enhancement component, and the optical fiber extends from the assembly port and passes through the protective tube. And / or, the fiber optic pickup sensor further includes a vibration damping fixing component, and the first housing is connected to the carrier device for vibration damping through the vibration damping fixing component.

[0023] In an optional implementation, it further includes:

[0024] A mounting bracket is connected to the mounting portion, and the mounting bracket is configured to connect the first housing to the carrier via the mounting bracket.

[0025] In an optional embodiment, the mounting part is disposed on a vibration damping pad, and the mounting part and the fixing frame are connected by the vibration damping pad.

[0026] In an optional embodiment, the vibration damping pad is detachably embedded in the mounting portion, the vibration damping pad is provided with a connecting portion, and the fixing frame is connected to the connecting portion.

[0027] In an optional embodiment, the connecting portion includes a receiving recess in which a nut block is embedded, and the fixing bracket is fastened to the nut block.

[0028] In an optional embodiment, the fixing frame includes an upper connecting plate and two side connecting plates, with one side connecting plate provided at each end of the upper connecting plate;

[0029] One end of the side connecting plate is connected to the upper connecting plate, and the other end is connected to the first housing. The two side connecting plates clamp the first housing so that the first housing is suspended relative to the upper connecting plate.

[0030] In an optional implementation, it further includes:

[0031] A buffer fastening member is disposed on the upper connecting plate. The upper connecting plate also includes a limiting part, which cooperates with the buffer fastening member for limiting. The buffer fastening member is configured to fasten the upper connecting plate to the bearing device.

[0032] The fiber optic microphone sensor provided by this utility model has a mounting part on the first housing of the sensor body, and the fiber optic microphone sensor is fixed to the carrier device through the mounting part. The second housing is disposed on the first housing. The sensitivity enhancement component is disposed at a distance from the first housing and disposed on the second housing. This can extend the vibration path, improve the vibration reduction effect, and improve the accuracy of the fiber optic microphone sensor.

[0033] This utility model provides an optical fiber sensing device, including at least one optical fiber pickup sensor as described in any of the foregoing embodiments.

[0034] Compared with the prior art, the fiber optic sensing device provided by this utility model has the fiber optic pickup sensor provided by this utility model, and thus has all the beneficial effects of the fiber optic pickup sensor provided by this utility model. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the fiber optic microphone sensor provided in an embodiment of the present invention;

[0037] Figure 2 for Figure 1 The diagram shows a structural schematic of the fiber optic microphone sensor from another angle.

[0038] Figure 3 for Figure 2 The diagram shows the structural schematic of the AA cross-section of the fiber optic microphone sensor.

[0039] Figure 4 for Figure 3 The diagram shows a partial enlarged view of section AA of the fiber optic microphone sensor.

[0040] Figure 5 for Figure 3 A partially enlarged view of section C of the fiber optic microphone sensor shown in the diagram;

[0041] Figure 6 for Figure 1 The diagram shows the structure of the first housing of the fiber optic microphone sensor.

[0042] Figure 7 for Figure 1The diagram shows the structure of the second housing of the fiber optic microphone sensor.

[0043] Figure 8 for Figure 1 The diagram shows a longitudinal section of the vibration damping fixing ring of the fiber optic pickup sensor.

[0044] Figure 9 for Figure 1 A schematic diagram of the sensitization component of the fiber optic pickup sensor is shown.

[0045] Figure 10 for Figure 1 The diagram shows the structure of the vibration damping pad for the fiber optic microphone sensor.

[0046] Icons: 100-Fixed frame; 101-Upper connecting plate; 1011-Limiting part; 102-Side connecting plate; 200-First housing; 201-Mounting part; 202-Upper notch; 300-Second housing; 301-Second snap-fit ​​protrusion; 302-Lower notch; 400-Protective cover; 500-Sound transmission hole; 600-Sensitizer component; 601-Frame; 6011-First snap-fit ​​protrusion; 602-Sensitizer cylinder; 700-Vibration damping fixing ring; 701-First fixing slot; 702-Second fixing slot; 800-Upper limit protrusion; 900-Supporting protrusion; 110-Vibration damping pad; 111-Accommodating recess; 120-Nut block; 130-Second opening; 140-First opening. Detailed Implementation

[0047] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0048] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0051] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0052] Reference Figures 1-10 This utility model provides an optical fiber microphone sensor, which includes a sensor body. The sensor body includes: a first housing 200, including a mounting part 201 configured to be connected to a carrier device; and a second housing 300, the first housing 200 and the second housing 300 being connected to form a receiving cavity. A sensitivity-enhancing component 600, separated from the first housing 200, is disposed within the receiving cavity. The sensitivity-enhancing component 600 is disposed within the second housing 300. The first housing 200 and / or the second housing 300 are provided with sound-transmitting holes 500.

[0053] In some embodiments, the mounting portion 201 of the fiber optic pickup sensor body is used to fix it on the idler roller bracket or on the carrier equipment adjacent to the conveyor belt idler roller; the mounting portion 201 can also be fixed according to the actual use environment.

[0054] The mounting part 201 is disposed on the first housing 200, the second housing 300 is disposed on the first housing 200, and the sensitivity enhancement component 600 is disposed in the receiving cavity, spaced apart from the first housing 200 and connected to the second housing 300. The vibration of the load-bearing device needs to be transmitted to the sensitivity enhancement component 600 after passing through the mounting part 201, the first housing 200, and the second housing 300. This extends the vibration path, improves the vibration reduction effect, and thus improves the accuracy of the fiber optic pickup sensor.

[0055] Reference Figure 1 , Figure 3 and Figure 9 In an optional embodiment, the sensitizing component 600 has a hollow acoustic cavity with a first opening 140 facing the second housing 300. The second housing 300 includes a sound-transmitting hole 500 communicating with the first opening 140. The first opening 140 communicates with the sound-transmitting hole 500, allowing the sensitizing component 600 to receive sound directly through the hollow acoustic cavity.

[0056] In some embodiments, the sensitizing component 600 has a hollow acoustic cavity, with a first opening 140 of the hollow acoustic cavity facing the second housing 300, and the second housing 300 has a sound-transmitting hole 500; this can improve the sound reception effect of the sensitizing component 600.

[0057] Reference Figure 7 In an optional embodiment, the second housing 300 includes a frame and a protective cover 400. The frame has a second opening 130 corresponding to the first opening 140, and the frame is fixed to the first opening 140. The protective cover 400 is disposed in the second opening 130 and has a sound-permeable hole 500. The protective cover 400 and the frame are separate, which facilitates individual replacement and maintenance of the protective cover 400 when it is damaged.

[0058] In an optional implementation, refer to Figure 7 The inner wall of the second opening 130 is provided with a support protrusion 900 and an upper limit protrusion 800. The upper limit protrusion 800 and the support protrusion 900 cooperate to fix the protective cover 400. Specifically, the support protrusion 900 abuts against the end of the protective cover 400 facing the receiving cavity, and the upper limit protrusion 800 further locks the side wall of the protective cover 400 or the end of the protective cover 400 facing away from the receiving cavity. The entire structure does not require screws, which can reduce the number of assembly parts.

[0059] In some embodiments, the second housing 300 has a second opening 130 corresponding to the first opening 140 on its frame. Preferably, both the first opening 140 and the second opening 130 are circular and are concentrically arranged.

[0060] More specifically, refer to Figure 7 In some embodiments, a support protrusion 900 and an upper limit protrusion 800 are uniformly provided on the inner wall of the second opening 130. The protective cover 400 is disposed at the second opening 130, and the support protrusion 900 and the upper limit protrusion 800 cooperate to fix the protective cover 400 at the second opening 130.

[0061] In some embodiments, the support protrusion 900 and the upper limit protrusion 800 at the second opening 130 are staggered, which makes the protective cover 400 more secure.

[0062] Multiple sound-permeable holes 500 are provided on the protective cover 400, with the sound-permeable holes 500 facing the first opening 140, so as to achieve the maximum sound reception effect.

[0063] Reference Figure 3 , Figure 4 and Figure 8 In an optional embodiment, the fiber optic pickup sensor further includes a vibration damping element, and the sensitivity enhancement component 600 is connected to the second housing 300 via at least one vibration damping element.

[0064] In an optional embodiment, the vibration damping component is a vibration damping fixing ring 700; one of the sensitizing component 600 and the vibration damping fixing ring 700 is provided with a first snap-fit ​​protrusion 6011, and the other is provided with a second fixing groove 702, the first snap-fit ​​protrusion 6011 and the second fixing groove 702 cooperate; one of the vibration damping fixing ring 700 and the second housing 300 is provided with a second snap-fit ​​protrusion 301, and the other is provided with a first fixing groove 701, the second snap-fit ​​protrusion 301 and the first fixing groove 701 cooperate, the structure is simple and easy to install and remove.

[0065] In an optional embodiment, the first snap-fit ​​protrusion 6011 is disposed on the outer periphery of the sensitizing component 600, and the second fixing groove 702 is disposed on the inner sidewall of the vibration damping fixing ring 700; the second snap-fit ​​protrusion 301 is disposed on the inner side of the second housing 300, and the first fixing groove 701 is disposed on the outer sidewall of the vibration damping fixing ring 700.

[0066] In an optional embodiment, the first fixing slot 701 and the second fixing slot 702 are respectively grooves extending circumferentially along the vibration damping fixing ring 700. The grooves extending circumferentially along the vibration damping fixing ring 700 can, on the one hand, hold the sensitizing component 600, and on the other hand, can play a role in radially limiting the vibration damping fixing ring 700, so that the sensitizing component 600 is not easy to fall off the vibration damping fixing ring 700.

[0067] In some embodiments, the sensitizing component 600 is connected to the second housing 300 via one or more vibration damping elements.

[0068] Among them, the vibration damping component is a vibration damping fixing ring 700, the first snap-fit ​​protrusion 6011 cooperates with the second fixing slot 702, and the second snap-fit ​​protrusion 301 cooperates with the first fixing slot 701, so that the vibration damping fixing ring 700 is connected to the first housing 200 and the second housing 300 respectively.

[0069] The first fixing slot 701 and the second fixing slot 702 are both provided on the vibration damping fixing ring 700, or the first locking protrusion 6011 and the second locking protrusion 301 are both provided on the vibration damping fixing ring 700, or the first fixing slot 701 and the first locking protrusion 6011 are provided on the vibration damping fixing ring 700, or the second fixing slot 702 and the second locking protrusion 301 are provided on the vibration damping fixing ring 700.

[0070] The first fixing groove 701 and the second fixing groove 702 are grooves extending circumferentially along the vibration damping fixing ring 700; the first snap-fit ​​protrusion 6011 matches the second fixing groove 702, and the second snap-fit ​​protrusion 301 matches the first fixing groove 701.

[0071] Reference Figure 3 and Figure 9In an optional embodiment, the sensitization component 600 includes a sensitization cylinder 602 and a frame 601, with the sensitization cylinder 602 sleeved on the frame 601 and the frame 601 disposed on the second housing 300.

[0072] In some embodiments, a hollow acoustic cavity is formed inside the skeleton 601, the sidewalls of the skeleton 601 are hollowed out, the skeleton 601 supports the sensitizing tube 602 through the sidewalls, the sensitizing tube 602 is connected to the hollow acoustic cavity, and the hollow sidewalls of the skeleton 601 facilitate the direct transmission of sound and its action on the sensitizing tube 602.

[0073] In some embodiments, the fiber optic pickup sensor further includes an optical fiber and a protective tube. The first housing 200 and / or the second housing 300 are also provided with an assembly port, on which the protective tube is assembled. An optical fiber is wound on the sensitizing component 600, and the optical fiber extends from the assembly port and passes through the protective tube.

[0074] In some embodiments, the fiber optic pickup sensor further includes a vibration damping fixture, and the first housing 200 is connected to the carrier device via the vibration damping fixture.

[0075] In some embodiments, an sensitizing cylinder 602 is sleeved on the skeleton 601 of the sensitizing component 600, and the skeleton 601 is connected to the second housing 300, thereby fixing the sensitizing component 600 on the second housing 300.

[0076] An optical fiber is wound around the sensitizing component 600, with both ends of the optical fiber extending from an assembly port and inserted into a protective tube.

[0077] Preferably, the two mounting ports are symmetrically arranged on both sides of the sensor body, one mounting port is used for the insertion of the optical fiber, and the other mounting port is used for the extension of the optical fiber.

[0078] Generally, the first housing 200 of the sensor body has an upper notch 202, and the second housing 300 has a lower notch 302. The upper notch 202 and the lower notch 302 cooperate to form an assembly port.

[0079] When there are multiple sensor bodies, adjacent sensor bodies are connected by a protective tube. This avoids the exposed state of the extended optical fibers of adjacent sensor bodies, which are easily subject to external interference. Furthermore, the fixed connection between the protective tube and the sensor body enhances the protective tube's resistance to external interference, thereby helping to protect the extended optical fibers between multiple sensor bodies from external interference such as stretching, impact, and bending.

[0080] To reduce the impact of vibration from the supporting equipment on the fiber optic microphone sensor, a vibration damping fixture is installed on the fiber optic microphone sensor. This fixture is used to connect to the supporting equipment, thus reducing vibration and minimizing the influence of the supporting equipment on the fiber optic microphone sensor.

[0081] Reference Figure 1 and Figure 3 In an optional embodiment, the fiber optic pickup sensor further includes a mounting bracket 100 connected to the mounting portion 201, the mounting bracket 100 being configured to connect the first housing 200 to the carrier device via the mounting bracket 100.

[0082] In an optional embodiment, a vibration damping pad 110 is provided on the mounting part 201, and the mounting part 201 and the fixing frame 100 are connected by the vibration damping pad 110.

[0083] In some embodiments, the mounting bracket 100 is connected to the mounting portion 201 of the first housing 200. The mounting bracket 100 is used to connect to the load-bearing device. Vibration damping pads 110 are provided on the mounting portion 201. The mounting bracket 100 is connected to the mounting portion 201 via the vibration damping pads 110. Vibration from the load-bearing device is transmitted to the first housing 200 after passing through the mounting bracket 100 and being damped by the vibration damping pads 110, thus achieving further vibration reduction. The mounting bracket 100 helps to extend the vibration propagation path or reduce the amount of vibration propagated to the first housing 200.

[0084] Reference Figure 6 and Figure 10 In an optional embodiment, the vibration damping pad 110 is detachably embedded in the mounting portion 201, and the vibration damping pad 110 is provided with a connecting portion, and the fixing bracket 100 is connected to the connecting portion.

[0085] In an optional embodiment, the connecting part includes a receiving recess 111, in which a nut block 120 is embedded, and the fixing bracket 100 is fastened to the nut block 120.

[0086] The mounting part 201 may have a mounting hole into which the vibration damping pad 110 is detachably embedded; the connecting part of the vibration damping pad 110 is used to connect with the fixing frame 100. Preferably, a receiving recess 111 is provided on the connecting part, and a nut block 120 is embedded in the receiving recess 111. The nut block 120 is used to detachably connect with the fixing frame 100.

[0087] Generally, a through hole is provided on the fixing frame 100, and a threaded hole corresponding to the through hole is provided on the nut block 120. After the screw passes through the through hole, it is screwed onto the nut block 120, thereby realizing the fastening connection between the fixing frame 100 and the nut block 120.

[0088] Reference Figure 3 In an optional embodiment, the fixing frame 100 includes an upper connecting plate 101 and two side connecting plates 102, with a side connecting plate 102 provided at each end of the upper connecting plate 101.

[0089] One end of the side connecting plate 102 is connected to the upper connecting plate 101, and the other end of the side connecting plate 102 is connected to the first housing 200. The two side connecting plates 102 clamp the first housing 200 so that the first housing 200 is suspended relative to the upper connecting plate 101.

[0090] A side connecting plate 102 is provided at each end of the upper connecting plate 101 of the mounting bracket 100. The two side connecting plates 102 clamp the first housing 200, making the first housing 200 suspended. At this time, the vibration of the supporting equipment can only be transmitted to the first housing 200 through the mounting bracket 100, avoiding vibration from other paths from affecting the fiber optic pickup sensor. The upper connecting plate 101 of the mounting bracket 100 can be installed and fixed to the supporting equipment. The first housing 200 is in a suspended state, which helps to reduce the vibration propagation to the first housing 200.

[0091] In an optional embodiment, the fiber optic microphone sensor further includes a buffer fastening element. The buffer fastening element is disposed on the upper connecting plate 101, which also includes a limiting portion 1011. The limiting portion 1011 engages with the buffer fastening element to limit its movement, and the buffer fastening element is configured to fasten the upper connecting plate 101 to the supporting equipment. In addition to its fixing function, the buffer fastening element also provides cushioning and vibration damping.

[0092] In some embodiments, a longer vibration propagation path can be formed by the buffer fastening member, the fixing frame 100, the vibration damping pad 110, the mounting part 201, the first housing 200, the second housing 300, and the vibration damping fixing ring 700, further reducing the impact of vibration on the sensitivity enhancement component 600. Simultaneously, the buffer fastening member, the vibration damping pad 110, and the vibration damping fixing ring 700 are vibration damping materials, which can work together to form multi-stage vibration damping along the vibration propagation path, further reducing the impact of vibration on the sensitivity enhancement component 600.

[0093] In some embodiments, a buffer fastening member is provided on the upper connecting plate 101, and one or more limiting parts 1011 are provided on the upper connecting plate 101. Preferably, two limiting parts 1011 are provided on the upper connecting plate 101. The two limiting parts 1011 restrict the movement of the buffer fastening member on the upper connecting plate 101 and prevent the buffer fastening member from detaching from the upper connecting plate 101.

[0094] The buffer fastener is used to fix the fiber optic pickup sensor to the carrier equipment. The buffer fastener, the vibration damping fixing ring 700 and the vibration damping pad 110 are made of vibration damping material, generally vibration damping rubber.

[0095] The fiber optic microphone sensor provided by this utility model has a mounting part 201 on the first housing 200 of the sensor body. The fiber optic microphone sensor is fixed to the carrier device through the mounting part 201. The second housing 300 is disposed on the first housing 200. The sensitivity enhancement component 600 is disposed at an interval from the first housing 200 and on the second housing 300. This can extend the vibration path, improve the vibration reduction effect, and improve the accuracy of the fiber optic microphone sensor.

[0096] The first housing 200 of the fiber optic pickup sensor is assembled with the vibration damping fixing ring 700, the vibration damping fixing ring 700 is assembled with the second housing 300, and the second housing 300 is assembled with the protective cover 400 by snap-fit ​​and plug-in. It has fewer parts, simple structure, and low disassembly cost. In addition, the first opening 140 and the second opening 130 are set to face each other, so as to achieve the maximum sound reception effect.

[0097] This utility model provides an optical fiber sensing device, including at least one optical fiber pickup sensor as described in any of the foregoing embodiments.

[0098] Compared with the prior art, the fiber optic sensing device provided by this utility model has the fiber optic pickup sensor provided by this utility model, and thus has all the beneficial effects of the fiber optic pickup sensor provided by this utility model.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fiber optic microphone sensor, characterized in that, Includes a sensor body, the sensor body comprising: The first housing (200) includes a mounting portion (201) configured to be connected to a carrier device; The second housing (300) is connected to the first housing (200) and forms a receiving cavity; The cavity contains a sensitive enhancement component (600) that is separated from the first housing (200). The sensitive enhancement component (600) is disposed in the second housing (300). The first housing (200) and / or the second housing (300) are provided with sound-permeable holes (500).

2. The fiber optic microphone sensor according to claim 1, characterized in that, The sensitizing component (600) has a hollow acoustic cavity with a first opening (140) facing the second housing (300), and the second housing (300) includes a sound-transmitting hole (500) communicating with the first opening (140).

3. The fiber optic microphone sensor according to claim 1, characterized in that, The second housing (300) includes: A frame having a second opening (130) corresponding to a first opening (140), the frame being fixed to the first opening (140); A protective cover (400) is provided at the second opening (130), and the protective cover (400) is provided with the sound-permeable hole (500).

4. The fiber optic microphone sensor according to claim 3, characterized in that, The inner wall of the second opening (130) is provided with a support protrusion (900) and an upper limit protrusion (800), and the upper limit protrusion (800) cooperates with the support protrusion (900) to fix the protective cover (400).

5. The fiber optic microphone sensor according to claim 1, characterized in that, It also includes a vibration damping element, and the sensitivity enhancement component (600) is connected to the second housing (300) via at least one of the vibration damping elements.

6. The fiber optic microphone sensor according to claim 5, characterized in that, The vibration damping component is a vibration damping fixing ring (700); One of the sensitivity enhancement component (600) and the vibration damping fixing ring (700) is provided with a first snap-fit ​​protrusion (6011), and the other is provided with a second fixing groove (702). The first snap-fit ​​protrusion (6011) and the second fixing groove (702) cooperate with each other. One of the vibration damping fixing ring (700) and the second housing (300) is provided with a second snap-fit ​​protrusion (301), and the other is provided with a first fixing groove (701). The second snap-fit ​​protrusion (301) cooperates with the first fixing groove (701).

7. The fiber optic microphone sensor according to claim 6, characterized in that, The first snap-fit ​​protrusion (6011) is disposed on the outer periphery of the sensitizing component (600), and the second fixing groove (702) is disposed on the inner sidewall of the vibration damping fixing ring (700); the second snap-fit ​​protrusion (301) is disposed on the inner side of the second housing (300), and the first fixing groove (701) is disposed on the outer sidewall of the vibration damping fixing ring (700); and / or, The first fixing groove (701) and the second fixing groove (702) are grooves extending circumferentially along the vibration damping fixing ring (700).

8. The fiber optic microphone sensor according to claim 5, characterized in that, The sensitivity enhancement component (600) is connected to the second housing (300) only through one of the vibration damping elements.

9. The fiber optic microphone sensor according to claim 1, characterized in that, The sensitizing component (600) includes a sensitizing cylinder (602) and a frame (601). The sensitizing cylinder (602) is sleeved on the frame (601), and the frame (601) is disposed on the second housing (300). A hollow acoustic cavity is formed inside the frame (601), and the sidewalls of the frame (601) are hollowed out. The sensitizing cylinder (602) communicates with the hollow acoustic cavity; and / or, The fiber optic microphone sensor further includes an optical fiber and a protective tube. The first housing (200) and / or the second housing (300) are also provided with an assembly port, on which the protective tube is assembled. The optical fiber is wound around the sensitizing component (600), and the optical fiber extends from the assembly port and passes through the protective tube; and / or, The fiber optic pickup sensor also includes a vibration damping fixture, and the first housing (200) is connected to the carrier device through the vibration damping fixture.

10. The fiber optic microphone sensor according to claim 1, characterized in that, Also includes: A mounting bracket (100) is connected to the mounting portion (201), the mounting bracket (100) being configured to connect the first housing (200) to the carrier via the mounting bracket (100).

11. The fiber optic microphone sensor according to claim 10, characterized in that, The mounting part (201) is provided with a vibration damping pad (110), and the mounting part (201) and the fixing frame (100) are connected by the vibration damping pad (110).

12. The fiber optic microphone sensor according to claim 11, characterized in that, The vibration damping pad (110) is detachably embedded in the mounting part (201), the vibration damping pad (110) is provided with a connecting part, and the fixing frame (100) is connected to the connecting part.

13. The fiber optic microphone sensor according to claim 12, characterized in that, The connecting part includes a receiving recess (111), in which a nut block (120) is embedded, and the fixing frame (100) is fastened to the nut block (120).

14. The fiber optic microphone sensor according to claim 10, characterized in that, The fixing frame (100) includes an upper connecting plate (101) and two side connecting plates (102), with one side connecting plate (102) respectively provided at each end of the upper connecting plate (101); One end of the side connecting plate (102) is connected to the upper connecting plate (101), and the other end is connected to the first housing (200). The two side connecting plates (102) clamp the first housing (200) so that the first housing (200) is suspended relative to the upper connecting plate (101).

15. The fiber optic microphone sensor according to claim 14, characterized in that, Also includes: A buffer fastening member is disposed on the upper connecting plate (101). The upper connecting plate (101) further includes a limiting part (1011). The limiting part (1011) cooperates with the buffer fastening member for limiting. The buffer fastening member is configured to fasten the upper connecting plate (101) to the bearing device.

16. A fiber optic sensing device, characterized in that, It includes at least one fiber optic pickup sensor as described in any one of claims 1-14.

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