A fiber grating demodulation device

Abstract

This invention provides a fiber Bragg grating demodulation device, relating to the field of fiber Bragg grating sensing technology. It includes a housing assembly comprising a top cover, a bottom cover, a front panel, and a rear panel, all interconnected by screws to form a closed housing. External components are installed inside the front panel, including a BNC interface, a power connector, an Ethernet connector, and a grounding post. The invention incorporates a shock-absorbing assembly, using a shock absorber connecting the bottom cover and the base plate to effectively isolate external vibrations and impacts, ensuring measurement accuracy in harsh environments. The device integrates a data acquisition and demodulation assembly, enabling localized real-time data processing, analysis, and reporting through the collaborative work of various circuit boards and modules. This not only reduces the burden on the upper-level system but also significantly improves the data processing response speed.

Description

Technical Field

[0001] This utility model relates to the field of fiber Bragg grating sensing technology, specifically to a fiber Bragg grating demodulation device. Background Technology

[0002] Fiber Bragg grating (FBG) sensing technology is widely used in industrial monitoring, structural health monitoring, and other fields. FBG demodulation equipment is the core component of this technology, used to demodulate the wavelength signal from the FBG sensor into identifiable physical quantities (such as strain and stress). Currently, existing FBG demodulation equipment has the following shortcomings:

[0003] Poor structural stability and lack of effective vibration reduction design make it susceptible to external vibration and impact, resulting in reduced measurement accuracy.

[0004] It has insufficient resistance to electromagnetic interference, and its signal transmission is easily interfered with in complex electromagnetic environments.

[0005] Data processing relies on the upper-level system, raw data transmission consumes bandwidth, and data processing response speed is slow, which cannot meet the needs of real-time monitoring;

[0006] The lack of compactness in the connection of equipment components and the unreasonable layout of external interfaces affect the integration and ease of use of the equipment. Therefore, a fiber optic grating demodulation device is proposed. Utility Model Content

[0007] In view of this, the present invention provides a fiber optic grating demodulation device, which aims to solve one of the technical problems of poor structural stability, insufficient anti-electromagnetic interference capability, and slow data processing response in the prior art.

[0008] The technical solution of this utility model embodiment is implemented as follows: a fiber optic grating demodulation device includes a housing assembly, which consists of a top cover, a bottom cover, a front panel, and a rear panel. The four parts are connected to each other by combination screws to form a closed housing.

[0009] The device's front panel houses external components, including BNC connectors, a power connector, an Ethernet connector, and a grounding post. The power connector is located above the Ethernet connector; both are connected to one side of the device's front panel via combination screws and are used for power input and Ethernet communication. A grounding post is located below the Ethernet connector for grounding the device and enhancing its electromagnetic interference immunity. Several sets of BNC connectors are evenly spaced on the other side of the front panel for signal input and output from fiber Bragg grating sensors.

[0010] The bottom of the housing assembly is symmetrically equipped with shock-absorbing components, which include a shock absorber base plate and a shock absorber. The bottom of the equipment cover is connected to the shock absorber base plate through the shock absorber, which can effectively isolate external vibrations and impacts and ensure the measurement accuracy of the equipment in harsh environments.

[0011] The housing assembly houses a data acquisition and demodulation assembly, which includes a filter, a power module, a light source board adapter board, copper pillars, a data acquisition board adapter board, a light source acquisition aluminum frame, a light source circuit board, a data acquisition circuit board, a control circuit board, a control board adapter board, and a power module and a filter adapter board. The top two sides of the light source board adapter board are threadedly connected to the light source acquisition aluminum frame via combination screws. The top surface of the light source acquisition aluminum frame is equipped with the light source circuit board, which provides the light source required for demodulation. The top four corners of the light source circuit board are connected to the control board adapter board via copper pillars. The top of the control board adapter board is threadedly connected to the control circuit board via bolts. The top surface of the control circuit board is encapsulated with a filter and a power module. The filter filters noise from the power supply and signal, and the power module supplies power to the various components of the device. Above the filter and power module is a power module and a filter adapter board, the top surface of which is threadedly connected to the data acquisition circuit board, used to acquire the wavelength signal from the fiber optic grating sensor. The top of the data acquisition circuit board is equipped with the light source acquisition aluminum frame, and the top two sides of the frame are threadedly connected to the data acquisition board adapter board, achieving a stable connection between the various circuit boards.

[0012] An indicator light socket is embedded on one side of the top surface of the device cover to display the device's working status (such as power, running, fault, etc.).

[0013] A metal button is installed inside one side of the front panel of the device, which serves as the power switch for the device.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] 1. This utility model is equipped with a shock absorption component, which uses a shock absorber to connect the lower cover of the equipment and the base plate of the shock absorber, effectively isolating external vibrations and impacts, and ensuring the measurement accuracy of the equipment in harsh environments;

[0016] 2. This utility model enhances the device's anti-electromagnetic interference capability and ensures the stability of signal transmission through an all-metal housing component structure combined with a grounding post design;

[0017] 3. The device of this utility model integrates a data acquisition and demodulation component. Through the collaborative work of various circuit boards and modules, it realizes local real-time calculation, analysis, processing and reporting of data, which not only reduces the burden on the upper-level system, but also greatly improves the response speed of data processing.

[0018] 4. The external components of this utility model are reasonably laid out. The BNC interface, power connector, Ethernet connector and grounding post facilitate the connection of the device with external sensors, power supply and network, and improve the integration and ease of use of the device.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the present invention;

[0022] Figure 2 The three-dimensional structure of this utility model Figure 1 ;

[0023] Figure 3 The three-dimensional structure of this utility model Figure 2 ;

[0024] Figure 4 The three-dimensional structure of this utility model Figure 3 ;

[0025] Figure 5 This utility model Figure 4 A schematic diagram of the explosion structure.

[0026] Figure label:

[0027] 10. Housing assembly; 264. Equipment cover; 266. Equipment bottom cover; 267. Equipment front panel; 268. Equipment rear panel;

[0028] 20. External components; 119. BNC interface; 124. Power connector; 133. Ethernet connector; 137. Grounding post;

[0029] 30. Vibration damping assembly; 140. Vibration damper base plate; 141. Vibration damper;

[0030] 40. Acquisition and demodulation components; 122. Filter; 136. Power module; 142. Light source board adapter board; 143. Copper pillar; 144. Acquisition board adapter board; 145. Light source acquisition aluminum frame; 146. Light source circuit board; 204. Acquisition circuit board; 246. Control circuit board; 263. Control board adapter board; 265. Power module and filter adapter board;

[0031] 2. Indicator light holder; 121. Metal button. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0033] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application.

[0034] It should also be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] The specific examples described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0037] Example

[0038] like Figures 1-5 As shown, this utility model embodiment provides a fiber optic grating demodulation device, including a housing assembly 10. The housing assembly 10 is composed of an upper cover 264, a lower cover 266, a front panel 267, and a rear panel 268. The four components are connected to each other by combination screws to form a closed shell.

[0039] An external component 20 is installed inside the front panel 267 of the device. The power connector 124 and the Ethernet connector 133 in the external component 20 are fixed to one side of the surface of the front panel 267 of the device by combination screws. The power connector 124 is used to connect to AC 220V power supply, and the Ethernet connector 133 is used for Ethernet communication. The grounding post 137 below the Ethernet connector 133 is used for device grounding. Several sets of BNC interfaces 119 on the other side of the surface of the front panel 267 of the device are used to connect fiber Bragg grating sensors to realize signal input and output.

[0040] A shock-absorbing assembly 30 is installed at the bottom of the housing assembly 10. The bottom of the equipment lower cover 266 is connected to the shock absorber base plate 140 through a shock absorber 141. The shock absorber 141 can be a metal spiral shock absorber, which effectively reduces the impact of external vibration on the internal components of the equipment.

[0041] The housing assembly 10 houses a data acquisition and demodulation assembly 40. A light source acquisition aluminum frame 145 is connected to the top of the light source board adapter plate 142 via combination screws on both sides. A light source circuit board 146 is mounted on top of the light source acquisition aluminum frame 145, providing a demodulation light source. The four corners of the top of the light source circuit board 146 are connected to a control board adapter plate 263 via copper pillars. A control board circuit board 246 is threadedly connected to the top of the control board adapter plate 263 via bolts. A filter 122 and a power module 136 are encapsulated on the surface of the control board circuit board 246. The filter 122 filters noise, and the power module 136 supplies power to the various components. A power module and filter adapter plate 265 are mounted above the filter 122 and power module 136, with a data acquisition circuit board 204 threadedly connected to its top. The data acquisition circuit board 204 is used to acquire wavelength signals. The light source acquisition aluminum frame 145 is mounted on top of the data acquisition circuit board 204, with a data acquisition board adapter plate 144 threadedly connected to its top sides, achieving a stable connection of the circuit board.

[0042] An indicator light base 2 is embedded on one side of the top surface of the device cover 264 to display the power supply, operation and other status of the device; the metal button 121 inside one side of the device front panel 267 serves as the device's power switch to control the device's start and stop.

[0043] When the equipment is in operation, the power connector 124 is connected to the power supply, which powers the acquisition and demodulation component 40 through the power module 136. The light source circuit board 146 emits light, which is reflected by the fiber optic grating sensor. The wavelength signal is then input to the acquisition circuit board 204 through the BNC interface 119. The acquisition circuit board 204 transmits the signal to the control circuit board 246. The control circuit board 246 has built-in signal processing software based on the Linux system, which calculates the wavelength data into strain and stress values. It also automatically identifies whether the sensor is online according to the wavelength range of the channel set by the customer, realizing local real-time data processing. The processed data can be uploaded to the upper-level system through the Ethernet connector 133. The shock absorption component 30 at the bottom of the equipment effectively isolates external vibrations, and the all-metal shell and grounding post 137 enhance the anti-electromagnetic interference capability, ensuring the stable operation of the equipment in complex environments.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fiber grating demodulation apparatus comprising a housing assembly (10), characterised in that: The housing assembly (10) includes an upper cover (264), a lower cover (266), a front panel (267), and a rear panel (268). An external component (20) is installed inside the front panel (267). The upper cover (264), lower cover (266), front panel (267), and rear panel (268) are connected to each other by a combination screw. A data acquisition and demodulation component (40) is installed inside the housing assembly (10). Shock-absorbing components (30) are symmetrically installed on the bottom of the housing assembly (10).

2. The fiber grating demodulation apparatus according to claim 1, characterized in that: The external component (20) includes a BNC interface (119), a power connector (124), an Ethernet connector (133), and a grounding post (137). The power connector (124) is located above the Ethernet connector (133). Both the power connector (124) and the Ethernet connector (133) are connected to one side of the front panel (267) of the device by combination screws. A grounding post (137) is provided below the Ethernet connector (133). Several sets of BNC interfaces (119) are arranged at equal intervals on the other side of the front panel (267) of the device.

3. The fiber grating demodulation apparatus according to claim 1, characterized in that: The shock absorption assembly (30) includes a shock absorber base plate (140) and a shock absorber (141), and the bottom of the equipment lower cover (266) is connected to the shock absorber base plate (140) through the shock absorber (141).

4. The fiber grating demodulation apparatus of claim 1, wherein: The acquisition and demodulation assembly (40) includes a filter (122), a power module (136), a light source board adapter board (142), a copper pillar (143), an acquisition board adapter board (144), a light source acquisition aluminum frame (145), a light source circuit board (146), an acquisition circuit board (204), a control circuit board (246), a control board adapter board (263), and a power module and filter adapter board (265).

5. The fiber grating demodulation apparatus according to claim 4, characterized in that: The top two sides of the light source board adapter plate (142) are connected to the light source acquisition aluminum frame (145) by combination screws. The top surface of the light source acquisition aluminum frame (145) is equipped with a light source circuit board (146). The four corners of the top of the light source circuit board (146) are symmetrically connected to the control board adapter plate (263) by copper pillars (143). The top of the control board adapter plate (263) is connected to the control circuit board (246) by bolts. The top surface of the control circuit board (246) is encapsulated with a filter (122) and a power module (136). The power module and filter adapter plate (265) is installed above the filter (122) and the power module (136). The top surface of the power module and filter adapter plate (265) is connected to the acquisition circuit board (204). The top of the acquisition circuit board (204) is equipped with the light source acquisition aluminum frame (145). The top two sides of the light source acquisition aluminum frame (145) are connected to the acquisition board adapter plate (144).

6. The fiber grating demodulation apparatus according to claim 1, characterized in that: An indicator light holder (2) is embedded on one side of the top surface of the device cover (264).

7. The fiber grating demodulation apparatus according to claim 1, characterized in that: A metal button (121) is internally mounted on one side of the front panel (267) of the device.

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