Optical fiber sensor and detection method

Abstract

The invention discloses an optical fiber sensor and a detection method, and relates to the technical field of sensors, and the optical fiber sensor comprises a sensor main body which is used for receiving an optical fiber signal; the control panel is mounted on the surface of the sensor main body, and the control panel is electrically connected with the interior of the sensor main body and used for adjusting parameters of the sensor main body; the display module is mounted on the surface of the control panel and is used for displaying data of the sensor main body; according to the optical fiber sensor and the detection method, in the use process, an optical signal is sent out from the output end of the optical fiber head and is focused through the optical lens outside the adjusting ring, the optical lens can effectively focus divergent light output by the optical fiber to a small light spot, accurate control over the optical signal is achieved, and the detection accuracy is improved. The light scattering phenomenon of the output end of the optical fiber is remarkably reduced, so that the output characteristics of optical signals are flexibly adjusted according to the specific requirements of different application scenes on the light beam shape, the light spot size and the optical power density, and diversified detection requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to an optical fiber sensor and a detection method. Background Art

[0002] With the rapid development of fiber-optic communication and sensing technologies, fiber-optic sensors have found widespread application in numerous fields, including industrial inspection. With their high sensitivity, immunity to electromagnetic interference, miniaturization, and ease of integration, fiber-optic sensors have become a vital component of modern inspection technology. However, as application demands continue to increase, existing fiber-optic sensors are facing pressing challenges in optical signal control and transmission efficiency.

[0003] In the practical application of fiber optic sensors, the quality of the optical signal output plays a crucial role in the accuracy of detection results. Traditional fiber optic sensors typically use a simple method of directly outputting optical signals from the fiber end face. This method has significant drawbacks: the light at the fiber output end is divergent, making it difficult to focus into a small spot. This results in significant loss of optical energy during transmission, preventing effective utilization. This light scattering not only reduces the intensity of the optical signal but also introduces additional noise, affecting the sensor's detection accuracy and sensitivity.

[0004] Furthermore, the beam shape, spot size, and optical power density cannot be flexibly adjusted to suit different application scenarios. In practical applications, different detection environments and target objects have varying requirements for optical signals. For example, high-precision microscopic detection requires a smaller spot size and higher optical power density, while large-area environmental monitoring requires a wider beam coverage. Existing fiber optic sensors cannot meet these diverse requirements, limiting their application in diverse and complex environments.

[0005] In summary, an optical fiber sensor and detection method are developed that can effectively control optical signal output, reduce light scattering and flexibly adjust the focal length. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention provides a fiber optic sensor and detection method, which solves the problem of light scattering in the existing fiber optic sensors mentioned in the background technology and the inability to flexibly adjust the beam characteristics to adapt to different application scenarios.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an optical fiber sensor and a detection method, comprising:

[0008] a sensor body for receiving optical fiber signals;

[0009] A control panel is mounted on the surface of the sensor body, the control panel is electrically connected to the interior of the sensor body, and is used to adjust the parameters of the sensor body;

[0010] A display module is installed on the surface of the control panel and is used to display the sensor body data;

[0011] An optical fiber line, one end of which is connected to the jack on the surface of the sensor body through a connector for sensor signal transmission;

[0012] The signal output module is connected to the other end of the optical fiber and is used to feed back the optical signal to the sensor body.

[0013] Preferably, a card seat is provided on one side of the sensor body, a mounting seat is provided on one side of the card seat, holes are provided at both ends of the surface of the mounting seat, and the holes at both ends are used for fixing by bolts, a card block is provided inside the card seat, both ends of the card block extend to the outside of the card seat, a buckle is provided at one end of the card block, two cards are provided, and the two cards are engaged with the grooves on one side of the card seat through the buckle, the card block is slidably connected to the outer wall of the slide rod, and the outside of the slide rod is sleeved with a first spring;

[0014] By cooperating with the card holder and the mounting base, the sensor body can be quickly installed and stably supported by bolt fixation. At the same time, the card block and the card holder are engaged in a snap-fit ​​structure, combined with the elastic connection of the slide rod and the first spring. This not only enables the sensor body to be quickly disassembled for easy maintenance and replacement, but also significantly improves the installation convenience and reliability of the sensor.

[0015] Preferably, a slide groove is provided on one end surface of the sensor body, the outside of the slide groove is slidably connected to the limit block, a convex structure is provided on the surface of the limit block, the limit block is engaged with the groove on the surface of the slide groove through the convex structure, and a gap is provided on one side surface of the limit block for inserting the optical fiber;

[0016] By setting a slide groove on the surface of one end of the sensor body and slidingly connecting it with the limit block, and utilizing the convex structure on the surface of the limit block to engage with the groove of the slide groove, the connector of the optical fiber can be effectively fixed to prevent it from loosening or falling out due to external force. At the same time, the gap design on the side of the limit block facilitates the insertion and positioning of the optical fiber, further enhancing the stability and reliability of the optical fiber connection, ensuring the continuity and stability of the optical fiber signal transmission, and effectively solving the problem that the optical fiber connection part is easily disturbed by external forces and causes signal interruption.

[0017] Preferably, the signal output module includes a focal length switching component, a fixing component and an optical fiber head, the optical fiber head is connected to one end of the optical fiber line, the fixing component is used to fix the optical fiber head, the focal length switching component is installed outside the fixing component, and the focal length switching component is used to adjust the focal length of the output end of the optical fiber head;

[0018] By setting the signal output module to a structure including a focal length switching component, a fixing component and an optical fiber head, flexible control of the optical fiber output light signal is achieved. The optical fiber head is connected to the optical fiber line to ensure stable transmission of the optical signal; the fixing component can firmly fix the optical fiber head to prevent the optical fiber head from loosening due to external force or vibration, thereby ensuring the stability of the optical signal output; the focal length switching component is installed on the outside of the fixing component, and by adjusting the focal length of the output end of the optical fiber head, the focusing characteristics of the optical signal can be effectively controlled, so that the output light beam can be flexibly adjusted according to the needs of different application scenarios, such as providing a smaller light spot when high-precision detection is required, and providing a larger light beam when large area coverage is required. This design significantly improves the applicability and detection accuracy of optical fiber sensors in a variety of complex environments, and solves the problem that traditional optical fiber sensors have a single optical signal output and are difficult to adapt to diverse needs.

[0019] Preferably, the fixing assembly includes a card slot, the interior of the card slot is engaged with the optical fiber head, and holes are provided at both ends of the card slot, the holes at both ends of the card slot are slidably connected to the outer wall of the limiting rod, the two ends of the limiting rod are connected to the base, a second spring is sleeved on the outside of one end of the limiting rod, and the top of the base is threadedly connected to the fixing cover;

[0020] The ingenious structure of the fixing component achieves stable fixation and flexible adjustment of the optical fiber head; the card slot fits tightly with the optical fiber head to ensure the stability of the optical fiber head when transmitting optical signals; the holes at both ends of the card slot are slidably connected to the limit rod, combined with the base at both ends of the limit rod and the second spring mounted on the limit rod, which can provide elastic buffering when the optical fiber head is subjected to external force, avoiding damage to the connection between the optical fiber head and the optical fiber line due to pulling, and at the same time ensuring the fixing accuracy of the optical fiber head during normal operation; in addition, the threaded connection design of the base and the fixing cover facilitates quick disassembly and assembly of the optical fiber head, further improving the maintenance convenience and reliability of the optical fiber sensor.

[0021] Preferably, the focus switching assembly includes an adjustment ring, the inner wall of the adjustment ring is rotatably connected to the annular protruding structure on the outer wall of the base, an optical lens is embedded on one side of the adjustment ring, and the optical lenses are distributed at equal intervals, a paddle is provided on one side of the adjustment ring, and a positioning groove is provided on the surface of the adjustment ring, a plurality of positioning grooves are provided, and each positioning groove corresponds to an optical lens, and the inner wall surface of the positioning groove is an arc-shaped surface;

[0022] The focal length switching component enables flexible adjustment of the output beam of the fiber optic sensor. The adjustment ring is rotatably connected to the annular protruding structure of the base, ensuring the stability and accuracy of the adjustment process. Optical lenses with equal spacing are embedded on one side of the adjustment ring, and each optical lens corresponds to a positioning groove. By rotating the adjustment ring with a paddle, optical lenses of different focal lengths can be aligned with the output end of the fiber optic head. The arc-shaped inner wall design of the positioning groove cooperates with the positioning rod to effectively fix the position of the adjustment ring, ensuring that the optical lens remains stably aligned during use, thereby achieving precise control of the beam shape, spot size and optical power density, meeting the diverse needs of different application scenarios, and significantly improving the applicability and detection accuracy of the fiber optic sensor.

[0023] Preferably, two connecting blocks are connected to the surface of the base, the surface of the connecting block is provided with a hole groove, a sealing plug is provided inside the hole groove, one side of the connecting block is connected to a telescopic tube, one end of the telescopic tube is connected to the telescopic block, a positioning rod is provided at one end of the top of the telescopic block, and a cleaning sponge and a water-absorbing sponge are embedded on one side of the telescopic block;

[0024] The automatic cleaning function of the optical lens of the fiber optic sensor is realized through the combination of the connecting block, telescopic tube, telescopic block, cleaning sponge and water-absorbing sponge on the base. The cooperation of the telescopic tube and telescopic block can realize the telescopic action of the positioning rod, and the setting of the cleaning sponge and water-absorbing sponge is used to automatically clean the surface of the optical lens when adjusting the focal length. This design not only reduces the frequency and difficulty of manual cleaning, but also effectively avoids the influence of dust or stains on the surface of the optical lens on the quality of optical signal transmission, improves the reliability and detection accuracy of the fiber optic sensor, and prolongs the service life of the optical lens.

[0025] Preferably, the telescopic block is provided with micropores on its surface for communicating the interior of the telescopic tube with the cleaning sponge. A third spring is sleeved on the exterior of the telescopic tube. The water-absorbing sponge is distributed on the exterior of the cleaning sponge and has a ring-shaped structure.

[0026] By setting micropores on the surface of the telescopic block, the inside of the telescopic tube is connected with the cleaning sponge, so that the cleaning liquid can evenly penetrate into the cleaning sponge through the micropores; the third spring outside the telescopic tube provides elastic support for the telescopic block, ensuring that the telescopic block can flexibly extend and retract and remain stable when adjusting the focal length; in addition, the water-absorbing sponge has a ring-shaped structure and is distributed on the outside of the cleaning sponge, which can effectively absorb excess cleaning liquid during the cleaning process and prevent liquid overflow from contaminating other parts of the sensor; this structural design not only improves the cleaning effect of the optical lens, but also enhances the anti-fouling performance and operational stability of the sensor, further improving the service life and detection accuracy of the optical fiber sensor.

[0027] Preferably, the steps are as follows:

[0028] S01. Equipment Installation and Connection: Secure the sensor body to the detection position using the mounting bracket and tighten with bolts. Insert one end of the optical fiber cable into the sensor body's jack and secure the fiber cable connector with a stopper to prevent loosening. Connect the other end of the optical fiber cable to the fiber connector of the signal output module and insert it into the slot of the fixing assembly. Secure the fiber connector using the elastic action of the second spring to ensure a secure connection and that the focus switching assembly is in its initial state.

[0029] S02. Startup and Parameter Adjustment: Start the fiber optic sensor. The fiber optic signal is transmitted to the sensor body through the optical fiber cable. Use the control panel to adjust the sensor body parameters to meet the detection requirements. Observe the display module to confirm that the intensity and quality of the fiber optic signal meet the detection requirements and ensure stable signal transmission.

[0030] S03. Focus Adjustment and Beam Optimization: Based on the characteristics of the detection target, such as distance and size, the adjustment ring of the focus switching assembly is rotated using a paddle to select the appropriate optical lens and align it with the fiber head. A positioning rod, activated by a third spring, engages the positioning slot, securing the adjustment ring and ensuring alignment between the optical lens and the fiber head. The optical lens focuses the divergent light output by the fiber into a smaller spot, optimizing the beam shape, spot size, and optical power density to meet the needs of different application scenarios.

[0031] S04. Signal Output and Detection: The optical signal, focused by the optical lens, is output through the signal output module for subsequent detection or analysis. Based on actual detection requirements, the output optical signal can be further processed, such as amplification and filtering, to obtain more accurate detection results. The output optical signal is then interacted with the detection target, such as by measuring reflected light intensity and refractive index changes, to obtain relevant information about the detection target.

[0032] S05. Data Recording and Analysis: The display module records relevant data of the optical fiber signal during the detection process, such as light intensity and wavelength changes. This recorded data is analyzed, and combined with the characteristics of the detection target, the target's status or performance indicators, such as temperature, pressure, and concentration, are evaluated. Based on the analysis results, it is determined whether the detection target meets the expected requirements or whether any abnormalities exist.

[0033] The present invention provides an optical fiber sensor and a detection method. It has the following beneficial effects:

[0034] During use, the present fiber optic sensor and detection method fixes the base of the signal output module so that the optical signal is emitted from the output end of the fiber optic head and is focused by the optical lens on the outside of the adjustment ring. The optical lens can effectively focus the divergent light output by the optical fiber into a smaller light spot, thereby achieving precise control of the optical signal and significantly reducing the light scattering phenomenon at the output end of the optical fiber, thereby improving the utilization efficiency of light energy. In addition, a plurality of optical lenses with different focal lengths are configured on the outside of the adjustment ring. By driving the adjustment ring to rotate by the paddle, the optical lenses with different focal lengths can be aligned with the output end of the fiber optic head in turn, thereby flexibly adjusting the output characteristics of the optical signal according to the specific requirements of different application scenarios for the beam shape, light spot size and light power density to meet diverse detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the main structure of the sensor of the present invention;

[0037] Figure 3 Schematic diagram of the sliding rod structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the internal structure of the base of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the optical lens of the present invention;

[0040] Figure 6 This is a schematic diagram of the telescopic tube structure of the present invention;

[0041] Figure 7 This is a schematic diagram of the card slot structure of the present invention;

[0042] Figure 8 This is a schematic diagram of the structure of the adjustment ring of the present invention;

[0043] Figure 9 It is a schematic diagram of the telescopic tube structure of the present invention.

[0044] In the figure, 1. sensor body; 101. card holder; 102. mounting base; 103. card block; 104. slide bar; 105. first spring; 106. limit block; 107. slide groove; 2. control panel; 3. display module; 4. optical fiber line; 5. signal output module; 501. optical fiber head; 502. card slot; 503. base; 504. second spring; 505. limit rod; 506. fixing cover; 507. adjustment ring; 508. optical lens; 509. pick; 510. positioning groove; 511. connecting block; 512. sealing plug; 513. telescopic tube; 514. third spring; 515. telescopic block; 516. cleaning sponge; 517. absorbent sponge; 518. positioning rod. DETAILED DESCRIPTION

[0045] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] Example 1:

[0047] See also Figure 1-9 The embodiment of the present invention provides a technical solution: an optical fiber sensor and a detection method, comprising:

[0048] A sensor body 1, which is used to receive optical fiber signals;

[0049] A control panel 2 is mounted on the surface of the sensor body 1 and is electrically connected to the interior of the sensor body 1 for adjusting parameters of the sensor body 1;

[0050] A display module 3 is mounted on the surface of the control panel 2 and is used to display data from the sensor body 1;

[0051] An optical fiber line 4, one end of which is connected to the surface jack of the sensor body 1 through a connector for transmitting sensor signals;

[0052] A signal output module 5 is connected to the other end of the optical fiber 4 and is used to feed back the optical signal to the sensor body 1;

[0053] The optical fiber sensor and detection method receive optical fiber signals through a sensor body 1 and use an optical fiber line 4 to transmit the signal. At the same time, a control panel 2 is provided to adjust the parameters of the sensor body 1, a display module 3 displays data in real time, and a signal output module 5 feeds back optical signals. These methods achieve effective transmission and precise control of optical signals, improve the utilization efficiency of optical signals, reduce light scattering, enhance the accuracy and sensitivity of detection, and can flexibly adapt to the diverse requirements of different application scenarios for light beam characteristics. These methods solve the problems of existing optical fiber sensors in optical signal control and transmission efficiency, and enhance the application range and detection performance of optical fiber sensors in complex environments.

[0054] Example 2:

[0055] See also Figure 1-9, the embodiment of the present invention provides a technical solution: an optical fiber sensor and a detection method, wherein a card base 101 is provided on one side of the sensor body 1, a mounting base 102 is provided on one side of the card base 101, and holes are provided at both ends of the surface of the mounting base 102, and the holes at both ends are used to be fixed by bolts, a card block 103 is provided inside the card base 101, and both ends of the card block 103 extend to the outside of the card base 101, and a buckle is provided at one end of the card block 103, and the card block 103 is provided with two, and the two card blocks 1 03 is engaged with the groove on one side of the card seat 101 through a buckle, and the card block 103 is slidably connected to the outer wall of the slide rod 104, and the outside of the slide rod 104 is sleeved with a first spring 105; a slide groove 107 is provided on one end surface of the sensor body 1, and the outside of the slide groove 107 is slidably connected with the limit block 106, and a convex structure is provided on the surface of the limit block 106. The limit block 106 is engaged with the groove on the surface of the slide groove 107 through the convex structure, and a gap is provided on one side surface of the limit block 106 for inserting the optical fiber line 4;

[0056] When installing the sensor body 1, the mounting base 102 is fixed by bolts, and then the slot 502 on one side of the sensor body 1 is docked and inserted into the outside of the block 103, so that the buckle at one end of the block 103 can engage and fix the slot 502, so that the sensor body 1 can be quickly installed. At the same time, by sliding the limit block 106, the limit block 106 can be inserted into the outside of the optical fiber line 4, and the limit block 106 can limit the connector of the optical fiber line 4 to prevent the connector of the optical fiber line 4 from being pulled out of the sensor body 1 by external force. When the sensor body 1 is disassembled and repaired, the two ends of the blocks 103 are pinched, so that the block 103 can squeeze the first spring 105, so that one end of the block 103 can be disengaged from the block 101, so that the sensor body 1 can be quickly disassembled, thereby improving the convenience of use.

[0057] Example 3:

[0058] See also Figure 1-9 , an embodiment of the present invention provides a technical solution: an optical fiber sensor and a detection method, the signal output module 5 includes a focal length switching component, a fixing component and an optical fiber head 501, the optical fiber head 501 is connected to one end of the optical fiber line 4, the fixing component is used to fix the optical fiber head 501, the focal length switching component is installed on the outside of the fixing component, and the focal length switching component is used to adjust the focal length of the output end of the optical fiber head 501; the fixing component includes a card slot 502, the interior of the card slot 502 is engaged with the optical fiber head 501, and holes are provided at both ends of the card slot 502, the holes at both ends of the card slot 502 are slidably connected to the outer wall of the limiting rod 505, the two ends of the limiting rod 505 are connected to the base 503, the outer end of the limiting rod 505 is sheathed with a second spring 504, and the top of the base 503 is threadedly connected to the fixing cover 506;

[0059] The fixing cover 506 can be removed by rotating the fixing cover 506, and then the slot 502 is slid, so that the slot 502 can slide along the outside of the limit rod 505, and the second spring 504 can be compressed while sliding, so that the optical fiber head 501 can be inserted into the slot 502. By loosening the slot 502, the optical fiber head 501 can be pushed to one end under the action of the second spring 504, so that the optical fiber head 501 can be quickly fixed. When the optical fiber line 4 is suddenly pulled from the outside, the optical fiber line 4 will drive the optical fiber head 501 inside the slot 502 to move. The optical fiber head 501 will compress the second spring 504 during the movement. Under the action of the second spring 504, the pulling force on the optical fiber head 501 can be buffered, thereby protecting the connection between the optical fiber head 501 and the optical fiber line 4.

[0060] Example 4:

[0061] See also Figure 1-9 , an embodiment of the present invention provides a technical solution: a fiber optic sensor and a detection method, wherein the focus switching component includes an adjustment ring 507, the inner wall of the adjustment ring 507 is rotatably connected to the annular protruding structure on the outer wall of the base 503, an optical lens 508 is embedded on one side of the adjustment ring 507, and the optical lenses 508 are distributed at equal intervals, a paddle 509 is provided on one side of the adjustment ring 507, and a positioning groove 510 is provided on the surface of the adjustment ring 507, a plurality of positioning grooves 510 are provided, and each positioning groove 510 corresponds to an optical lens 508, and the inner wall surface of the positioning groove 510 is an arc-shaped surface;

[0062] Among them, when the fiber optic sensor is in use, the base 503 of the signal output module 5 is fixed, and the optical signal is output from the output end of the optical fiber head 501, and then passes through the optical lens 508 outside the adjustment ring 507 for focusing. The optical lens 508 can focus the divergent light output by the optical fiber onto a smaller light spot, which can effectively control the light and reduce the scattering of light at the output end of the optical fiber. By reducing unnecessary scattering, the utilization rate of light energy is improved. A plurality of optical lenses 508 with different focal lengths are arranged on the outside of the adjustment ring 507, and the adjustment ring 507 is driven to rotate by the paddle 509. When the adjustment ring 507 rotates, it can drive the different optical lenses 508 on the outside to align with the output end of the optical fiber head 501. By setting a plurality of optical lenses 508 with different focal lengths, the specific requirements for beam shape, light spot size, and light power density in different application scenarios can be met.

[0063] Example 5:

[0064] See also Figure 1-9, an embodiment of the present invention provides a technical solution: a fiber optic sensor and detection method, wherein two connecting blocks 511 are connected to the surface of the base 503, and the surface of the connecting block 511 is provided with a hole groove, and a sealing plug 512 is provided inside the hole groove. A telescopic tube 513 is connected to one side of the connecting block 511, and one end of the telescopic tube 513 is connected to a telescopic block 515. A positioning rod 518 is provided at one end of the top of the telescopic block 515. A cleaning sponge 516 and a water-absorbing sponge 517 are embedded on one side of the telescopic block 515; micropores are provided on the surface of the telescopic block 515 for communicating between the inside of the telescopic tube 513 and the cleaning sponge 516, and a third spring 514 is sleeved on the outside of the telescopic tube 513. The water-absorbing sponge 517 is distributed on the outside of the cleaning sponge 516, and the water-absorbing sponge 517 has a ring-shaped structure;

[0065] When the fiber optic sensor is in use, the base 503 of the signal output module 5 is fixed, and the optical signal is output from the output end of the fiber optic head 501, and then focused through the optical lens 508 outside the adjustment ring 507. The optical lens 508 can focus the divergent light output by the optical fiber onto a smaller light spot, which can effectively control the light and reduce the scattering of light at the output end of the optical fiber. By reducing unnecessary scattering, the utilization rate of light energy is improved. A plurality of optical lenses 508 with different focal lengths are arranged on the outside of the adjustment ring 507, and the adjustment ring 507 is driven to rotate by the paddle 509. When the adjustment ring 507 rotates, it can drive the different optical lenses 508 on the outside to align with the output end of the fiber optic head 501. By setting a plurality of optical lenses 508 with different focal lengths, the specific requirements for beam shape, light spot size, and light power density in different application scenarios can be met.

[0066] Example 6:

[0067] See also Figure 1-9 The embodiment of the present invention provides a technical solution: an optical fiber sensor and a detection method, the steps of which are as follows:

[0068] S01. Equipment Installation and Connection: Fix the sensor body 1 in the detection position via the mounting base 102 and tighten with bolts; insert one end of the optical fiber cable 4 into the jack of the sensor body 1 and secure the connector of the optical fiber cable 4 with the stopper 106 to prevent loosening; connect the other end of the optical fiber cable 4 to the optical fiber head 501 of the signal output module 5 and insert it into the slot 502 of the fixing assembly. Secure the optical fiber head 501 with the elastic action of the second spring 504 to ensure a secure connection and that the focus switching assembly is in its initial state;

[0069] S02. Startup and parameter adjustment: Start the fiber optic sensor. The fiber optic signal is transmitted to the sensor body 1 through the optical fiber line 4. Adjust the parameters of the sensor body 1, such as the light source intensity and wavelength, through the control panel 2 to meet the detection requirements. Observe the display module 3 to confirm that the intensity and quality of the fiber optic signal meet the detection requirements and ensure stable signal transmission.

[0070] S03. Focus Adjustment and Beam Optimization: Based on the characteristics of the detection target, such as distance and size, the adjustment ring 507 of the focus switching assembly is rotated using the paddle 509 to select the appropriate optical lens 508 for alignment with the fiber head 501. The positioning rod 518, under the action of the third spring 514, engages the positioning groove 510, securing the adjustment ring 507 and ensuring that the optical lens 508 and the fiber head 501 remain aligned. The optical lens 508 focuses the divergent light output by the optical fiber into a smaller spot, optimizing the beam shape, spot size, and optical power density to meet the needs of different application scenarios.

[0071] S04. Signal Output and Detection: The optical signal focused by the optical lens 508 is output via the signal output module 5 for subsequent detection or analysis. Depending on the actual detection requirements, the output optical signal can be further processed, such as amplification and filtering, to obtain more accurate detection results. The output optical signal is then interacted with the detection target, such as by measuring the reflected light intensity and refractive index change, to obtain relevant information about the detection target.

[0072] S05. Data Recording and Analysis: Display module 3 records relevant data of the optical fiber signal during the detection process, such as light intensity and wavelength changes. Analyze the recorded data and, based on the characteristics of the detection target, evaluate the target's status or performance indicators, such as temperature, pressure, and concentration. Based on the analysis results, determine whether the detection target meets the expected requirements or whether any abnormalities exist.

[0073] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0074] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An optical fiber sensor, characterized in that: include: A sensor body (1) for receiving optical fiber signals; A control panel (2) is mounted on the surface of the sensor body (1), and the control panel (2) is electrically connected to the interior of the sensor body (1); A display module (3) is mounted on the surface of the control panel (2) and is used to display data of the sensor body (1); An optical fiber line (4), one end of which is connected to a socket on the surface of the sensor body (1) via a connector for transmitting sensor signals; A signal output module (5) is connected to the other end of the optical fiber line (4) and is used to feed back the optical signal to the sensor body (1).

2. The optical fiber sensor according to claim 1, characterized in that: A card seat (101) is provided on one side of the sensor body (1), and a mounting seat (102) is provided on one side of the card seat (101). Holes are provided at both ends of the surface of the mounting seat (102), and the holes at both ends are used for fixing by bolts. A card block (103) is provided inside the card seat (101), and both ends of the card block (103) extend to the outside of the card seat (101). A buckle is provided at one end of the card block (103). There are two card blocks (103). The two card blocks (103) are engaged with the grooves on one side of the card seat (101) through the buckle. The card block (103) is slidably connected to the outer wall of the slide rod (104), and the outside of the slide rod (104) is covered with a first spring (105).

3. The optical fiber sensor according to claim 2, characterized in that: A sliding groove (107) is provided on one end surface of the sensor body (1), the outside of the sliding groove (107) is slidably connected to the limit block (106), the surface of the limit block (106) is provided with a convex structure, the limit block (106) is engaged with the groove on the surface of the sliding groove (107) through the convex structure, and a gap is provided on one side surface of the limit block (106) for inserting the optical fiber line (4).

4. The optical fiber sensor according to claim 3, characterized in that: The signal output module (5) comprises a focal length switching component, a fixing component and an optical fiber head (501); the optical fiber head (501) is connected to one end of the optical fiber line (4); the fixing component is used to fix the optical fiber head (501); the focal length switching component is installed outside the fixing component; and the focal length switching component is used to adjust the focal length of the output end of the optical fiber head (501).

5. The optical fiber sensor according to claim 4, characterized in that: The fixing assembly comprises a card slot (502), the interior of the card slot (502) is engaged with the optical fiber head (501), and holes are provided at both ends of the card slot (502), the holes at both ends of the card slot (502) are slidably connected to the outer wall of the limiting rod (505), the two ends of the limiting rod (505) are connected to the base (503), a second spring (504) is sleeved on the outside of one end of the limiting rod (505), and the top of the base (503) is threadedly connected to the fixing cover (506).

6. The optical fiber sensor according to claim 5, characterized in that: The focus switching component includes an adjustment ring (507), the inner wall of the adjustment ring (507) is rotatably connected to the annular protruding structure of the outer wall of the base (503), an optical lens (508) is embedded on one side surface of the adjustment ring (507), and the optical lenses (508) are distributed at equal intervals. A paddle (509) is provided on one side of the adjustment ring (507), and a positioning groove (510) is provided on the surface of the adjustment ring (507), and a plurality of positioning grooves (510) are provided, and each positioning groove (510) corresponds to an optical lens (508), and the inner wall surface of the positioning groove (510) is an arc-shaped surface.

7. The optical fiber sensor according to claim 6, characterized in that: Two connecting blocks (511) are connected to the surface of the base (503), and a hole groove is provided on the surface of the connecting block (511), and a sealing plug (512) is provided inside the hole groove. One side of the connecting block (511) is connected to a telescopic tube (513), and one end of the telescopic tube (513) is connected to a telescopic block (515). A positioning rod (518) is provided at one end of the top of the telescopic block (515), and a cleaning sponge (516) and a water-absorbing sponge (517) are embedded on one side of the telescopic block (515).

8. The optical fiber sensor according to claim 7, characterized in that: The telescopic block (515) is provided with micropores on its surface for communicating the interior of the telescopic tube (513) with the cleaning sponge (516). A third spring (514) is sleeved on the exterior of the telescopic tube (513). The water-absorbing sponge (517) is distributed outside the cleaning sponge (516). The water-absorbing sponge (517) is in a ring-shaped structure.

9. The optical fiber sensor detection method according to claim 8, characterized in that: The steps are as follows: S01. Equipment installation and connection: Fix the sensor body (1) at the detection position through the mounting base (102) and tighten it with bolts; insert one end of the optical fiber line (4) into the jack of the sensor body (1), and fix the optical fiber line (4) connector through the limit block (106) to prevent it from loosening; connect the other end of the optical fiber line (4) to the optical fiber head (501) of the signal output module (5), and insert it into the card slot (502) of the fixing component, and use the elastic action of the second spring (504) to fix the optical fiber head (501) to ensure that the connection is firm and the focus switching component is in the initial state; S02. Startup and parameter adjustment: Start the fiber optic sensor, and the fiber optic signal is transmitted to the sensor body (1) through the optical fiber line (4); adjust the parameters of the sensor body (1) through the control panel (2); observe the display module (3) to confirm that the intensity and quality of the fiber optic signal meet the detection requirements and ensure stable signal transmission; S03. Focus adjustment and beam optimization: According to the characteristics of the detection target, such as distance and size, the adjustment ring (507) of the focus switching assembly is rotated by the paddle (509) to select a suitable optical lens (508) to align with the optical fiber head (501); the positioning rod (518) is embedded in the positioning groove (510) under the action of the third spring (514), and the adjustment ring (507) is fixed to ensure that the optical lens (508) and the optical fiber head (501) remain aligned; the optical lens (508) focuses the divergent light output by the optical fiber into a smaller spot, optimizing the beam shape, spot size and optical power density to meet the needs of different application scenarios; S04. Signal output and detection: The optical signal focused by the optical lens (508) is output through the signal output module (5) for subsequent detection or analysis; according to actual detection requirements, the output optical signal can be further processed, such as amplification, filtering, etc., to obtain more accurate detection results; the output optical signal interacts with the detection target, such as measuring the reflected light intensity, refractive index change, etc., to obtain relevant information about the detection target; S05. Data recording and analysis: The display module (3) records the relevant data of the optical fiber signal during the detection process, such as light intensity and wavelength changes; analyzes the recorded data, and evaluates the state or performance indicators of the detection target, such as temperature, pressure, concentration, etc., in combination with the characteristics of the detection target; and judges whether the detection target meets the expected requirements or whether there are any abnormal conditions based on the analysis results.

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