Detection device for fiber bragg grating pressure sensor

Abstract

The utility model discloses a fiber bragg grating pressure sensor detection device which comprises a steel cable, a lower fixing seat and an upper fixing seat, the lower fixing seat and the upper fixing seat are arranged on the steel cable, and the upper fixing seat and the lower fixing seat are detachably connected through a fastening assembly. A detachable arch-shaped elastic sheet is arranged between the two upper fixing seats, and a fiber grating sensor is fixedly installed at the upper end of the arch-shaped elastic sheet. According to the utility model, the cable force change of the steel strand cable is monitored, and the sensor is not influenced by the torsion of the steel strand and can be deformed along with the extension of the steel strand without being damaged. And the tension condition of the steel strand can be reflected.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection device technical field especially relates to a kind of fiber grating pressure sensor detection device. BACKGROUND

[0002] In industrial production, civil engineering, aerospace and other fields, pressure monitoring is a crucial task. Traditional pressure sensors, such as voltage and resistance type pressure sensors, although meet the demand of pressure monitoring to some extent, still face many challenges in practical application. With the development of optical fiber sensing technology, fiber grating pressure sensor gradually emerges. Fiber grating sensor uses the sensitive response of fiber grating to external physical parameters to encode the measured parameters by wavelength, realizing the absolute measurement of physical parameters. This sensor has the advantages of anti-electromagnetic interference, corrosion resistance, high temperature resistance, easy installation and maintenance, and is gradually widely used in various fields.

[0003] However, the existing fiber grating pressure sensor detection device still has some shortcomings. For example, some devices are not reasonable in structure design, which causes the sensor to deform or damage when bearing pressure; some devices have bottlenecks in signal transmission and processing, affecting the real-time and accuracy of monitoring data. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a fiber grating pressure sensor detection device, which monitors the change of cable force of steel strand cable. The sensor is not affected by the torsion of steel strand cable and can not be damaged with the elongation and deformation of steel strand cable. It can reflect the tension of steel strand cable.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A fiber grating pressure sensor detection device includes a steel cable and a lower fixing seat and an upper fixing seat arranged on the steel cable. The upper fixing seat and the lower fixing seat are detachably connected by a fastening assembly.

[0007] A detachable arc-shaped elastic sheet is arranged between the two upper fixing seats, and the upper end of the arc-shaped elastic sheet is fixedly installed with a fiber grating sensor.

[0008] Preferably, the fastening assembly includes a screw rod fixedly installed on the upper end of the lower fixing seat, and the upper end of the screw rod passes through the upper fixing seat and is threadedly connected with a fastening nut.

[0009] Preferably, a through hole matched with the screw rod is formed in the upper fixing seat.

[0010] Preferably, two ends of the arc-shaped elastic sheet are arranged on the upper surfaces of the two upper fixing bases respectively, and the arc-shaped elastic sheet is detachably connected with the upper fixing bases through two mounting screws.

[0011] Preferably, the fiber grating sensor is fixedly installed on the middle upper surface of the arc-shaped elastic sheet through fusion.

[0012] Preferably, the outer side of the steel cable is provided with a lower protective cover and an upper protective cover, the lower protective cover and the upper protective cover are hinged, and the opposite sides of the lower protective cover and the upper protective cover are both provided with through holes for the steel cable to pass through, and protective pads are fixedly installed in the through holes.

[0013] The utility model has the following beneficial effects:

[0014] The fiber grating pressure sensor can accurately monitor slight pressure changes, has high sensitivity, and is suitable for precise measurement occasions. The high sensitivity ensures that the device can accurately capture pressure changes and provide reliable monitoring data.

[0015] The device monitors the cable force changes of the steel strand cable, the sensor is not affected by the torsion of the steel strand cable, can not be damaged with the elongation deformation of the steel strand cable, and can reflect the tension condition of the steel strand cable.

[0016] Through the combination of the upper protective cover, the lower protective cover and the protective pad, the steel cable and the internal structure thereof can be effectively protected from the influence of the external environment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 A structural schematic view of a fiber grating pressure sensor detection device is provided for the utility model;

[0018] Fig. 2 A top view structural schematic view of a sensor of a fiber grating pressure sensor detection device is provided for the utility model;

[0019] Fig. 3 A structural schematic view of a lower fixing base of a fiber grating pressure sensor detection device is provided for the utility model.

[0020] In the drawing: 1 lower protective cover, 2 upper protective cover, 3 protective pad, 4 steel cable, 5 lower fixing base, 6 upper fixing base, 7 fastening nut, 8 arc-shaped elastic sheet, 9 screw rod, 10 fiber grating sensor. DETAILED DESCRIPTION

[0021] The following embodiments and features in the embodiments can be combined with each other under the condition of no conflict.

[0022] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and thus only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be changed at will, and the component layout pattern can also be more complex.

[0023] Some example embodiments of the present application are described for the purpose of illustration, and it should be understood that the present application can be implemented in other ways not specifically shown in the drawings.

[0024] Referring to Figs. 1-3 A fiber grating pressure sensor detection device includes a steel cable 4 and a lower fixing seat 5 and an upper fixing seat 6 arranged on the steel cable 4. The lower fixing seat 5 and the upper fixing seat 6 are detachably connected through a fastening assembly. The fastening assembly includes a threaded rod 9 fixedly installed on the upper end of the lower fixing seat 5. The upper end of the threaded rod 9 penetrates through the upper fixing seat 6 and is threadedly connected with a fastening nut 7. A through hole adapted to the threaded rod 9 is formed in the upper fixing seat 6. The surface of the threaded rod 9 is subjected to zinc plating treatment, thereby enhancing the corrosion resistance and ensuring stable connection performance in harsh environments. The fastening nut 7 is designed to be anti-loose, thereby maintaining a fastened state under vibration or impact conditions and avoiding connection failure caused by loosening.

[0025] Two detachable arc-shaped elastic sheets 8 are arranged between the two upper fixing seats 6. The arc-shaped elastic sheet 8 is made of spring steel and has good elasticity and fatigue strength, thereby being able to withstand the monitoring load of the fiber grating sensor 10 for a long time. The two ends of the arc-shaped elastic sheet 8 are arranged on the upper surfaces of the two upper fixing seats 6, respectively. The arc-shaped elastic sheet 8 is detachably connected with the upper fixing seat 6 through two mounting screws. The mounting screws are made of stainless steel and have good corrosion resistance and mechanical strength, thereby being able to ensure stable connection between the arc-shaped elastic sheet 8 and the upper fixing seat 6. The upper end of the arc-shaped elastic sheet 8 is fixedly installed with the fiber grating sensor 10. The fiber grating sensor 10 is fixedly installed on the upper surface of the middle part of the arc-shaped elastic sheet 8 by means of fusion. The surface of the fiber grating sensor 10 is covered with a protective coating, thereby preventing damage to the sensor caused by external factors and ensuring the accuracy and reliability of the monitoring data.

[0026] The outer side of the steel cable 4 is provided with a lower protective cover 1 and an upper protective cover 2, the lower protective cover 1 and the upper protective cover 2 are hinged between each other and can be fixed by buckle clamping, the opposite side of the lower protective cover 1 and the upper protective cover 2 is provided with a through hole for the steel cable 4 to pass through, a protective pad 3 is fixedly installed in the through hole, the material of the lower protective cover 1 and the upper protective cover 2 is high-strength aluminum alloy, which has good corrosion resistance and impact resistance, and can effectively protect the steel cable 4 and its internal structure from the influence of the external environment, the protective pad 3 is made of wear-resistant rubber material, which can reduce the friction of the steel cable 4 in the through hole and prolong the service life of the steel cable 4.

[0027] Working principle:

[0028] The lower fixing seat 5 is fixed to the predetermined position of the steel cable 4, and the upper fixing seat 6 is placed above the screw rod 9, ensuring that the through hole thereof is aligned with the screw rod 9. Then, the upper fixing seat 6 is fastened and connected with the screw rod 9 by using the fastening nut 7 designed with a loosening prevention function;

[0029] Then, the two ends of the arc-shaped elastic sheet 8 are respectively placed on the upper surfaces of the two upper fixing seats 6, ensuring accurate positions. The arc-shaped elastic sheet 8 is fixedly connected with the upper fixing seat 6 by using the mounting screw made of stainless steel, the fiber grating sensor 10 is welded on the upper surface of the middle part of the arc-shaped elastic sheet 8, ensuring that the surface of the sensor is covered with a protective coating, and the fiber grating sensor 10 is connected with the fiber grating signal demodulator for signal transmission;

[0030] The lower protective cover 1 is installed to the predetermined position of the steel cable 4. The upper protective cover 2 is connected with the lower protective cover 1 through hinging. The through holes on the lower protective cover 1 and the upper protective cover 2 are aligned with the steel cable 4, and the protective pad 3 made of wear-resistant rubber material is installed in the through holes, which protects the steel cable 4 and its internal structure from the influence of the external environment.

[0031] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] The above merely is the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A fiber Bragg grating pressure sensor detection device, characterized by: The utility model relates to a kind of optical fiber grating sensor, including cable (4) and the lower fixing seat (5) and upper fixing seat (6) arranged on cable (4), the lower fixing seat (5) and upper fixing seat (6) are detachably connected by fastening assembly between the lower fixing seat (5) and upper fixing seat (6); Two the upper fixing seat (6) between detachable arc elastic sheet (8) is arranged, and the upper end of the arc elastic sheet (8) is fixedly installed fiber grating sensor (10).

2. The fiber Bragg grating pressure sensor detection device according to claim 1, wherein, The fastening assembly includes screw rod (9) fixedly installed on the upper end of lower fixing seat (5), and the upper end of screw rod (9) passes through upper fixing seat (6) and is screw-connected with fastening nut (7).

3. The fiber grating pressure sensor detection device according to claim 1, wherein, The upper fixing seat (6) is provided with a through hole matched with the screw rod (9).

4. The fiber grating pressure sensor detection device of claim 1, wherein, Two ends of the arc elastic sheet (8) are respectively arranged on the upper surface of two upper fixing seats (6), and the arc elastic sheet (8) is detachably connected with the upper fixing seat (6) by two mounting screws.

5. The fiber grating pressure sensor detection device of claim 1, wherein, The fiber grating sensor (10) is fixedly installed on the upper surface of the middle part of the arc elastic sheet (8) by fusion.

6. The fiber Bragg grating pressure sensor detection device according to claim 1, wherein, The outer side of the cable (4) is provided with lower protective cover (1) and upper protective cover (2), the lower protective cover (1) and upper protective cover (2) are hinged between the lower protective cover (1) and upper protective cover (2), the side opposite to the lower protective cover (1) and upper protective cover (2) is provided with a through hole for the cable (4) to pass through, and the through hole is fixedly installed with protective pad (3).

Images