Anti-interference fiber grating temperature sensor

Abstract

The utility model belongs to temperature sensor technical field, specifically is a kind of anti-interference type optical fiber grating temperature sensor, including upper shielding cover and lower support base plate, the top of upper shielding cover is fixedly connected with hemispherical shield, the surface sliding connection of hemispherical shield has adjusting arc conductive plate, the surface sliding connection of adjusting arc conductive plate has auxiliary metal block, the top of auxiliary metal block is fixedly connected with capture antenna, the four corners of upper shielding cover bottom are fixedly connected with metal conductive rod, the surface of lower support base plate is slidably connected with the surface of metal conductive rod, the surface of metal conductive rod and the position at the bottom of lower support base plate are threadedly connected with fastening nut, by being provided with hemispherical shield and capture antenna, interference signal can be received and isolated, to prevent the signal interference temperature sensor ontology of optical fiber cable, to further guarantee the stability when using.

Description

Technical Field

[0001] This invention belongs to the field of temperature sensor technology, specifically an anti-interference fiber optic grating temperature sensor. Background Technology

[0002] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. It is the core component of temperature measuring instruments. Through its unique sensitive element, it realizes the conversion of non-electrical quantities into electrical quantities. This conversion enables temperature to be measured, displayed, or controlled. It is widely used in many fields such as industrial automation, environmental monitoring, medical and health care, automotive industry, and home appliances.

[0003] Chinese patent CN220398751U discloses an anti-interference temperature sensor, including a sensor junction box. A screw sleeve is installed at the bottom of the junction box, and a protective sleeve is fixedly inserted through the middle of the screw sleeve. Multiple shallow grooves are formed on the side wall of the protective sleeve. A diagonal support bar is hinged to one side of the inner wall of each of the shallow grooves. A folded metal spring is fixedly connected to the middle of the bottom end of each diagonal support bar. A thermistor is installed at one end of each folded metal spring and at the bottom of the protective sleeve. This anti-interference temperature sensor, by setting multiple shallow grooves on the side wall of the protective sleeve, in conjunction with the diagonal support bar, folded metal spring, and thermistor, allows for adjustment of temperature measurement at one or more points under different detection accuracy requirements. This makes it applicable to a wider range of situations, and the evenly distributed multi-point measurement can obtain richer temperature values ​​of the container environment, achieving better detection results.

[0004] As mentioned above, the patent provides an anti-interference temperature sensor that can achieve multi-point temperature measurement and improve detection effect. However, when applied to optical fiber cables, some optical fiber cables' signals can interfere with the temperature sensor's signal, affecting the performance.

[0005] Therefore, an anti-interference fiber Bragg grating temperature sensor is proposed to address the above problems. Utility Model Content

[0006] To overcome the shortcomings of existing technologies and solve the problem that some optical fiber cables' signals can interfere with the temperature sensor's signal, thus affecting its performance, an anti-interference fiber Bragg grating temperature sensor is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The anti-interference fiber optic grating temperature sensor of this utility model includes an upper shielding cover and a lower support base plate; a hemispherical shielding cover is fixedly connected to the top of the upper shielding cover, an adjustable arc-shaped conductive plate is slidably connected to the surface of the hemispherical shielding cover, an auxiliary metal block is slidably connected to the surface of the adjustable arc-shaped conductive plate, a capturing antenna is fixedly connected to the top of the auxiliary metal block, metal conductive rods are fixedly connected to the four corners of the bottom of the upper shielding cover, the surface of the lower support base plate is slidably connected to the surface of the metal conductive rod, a fastening nut is threadedly connected to the surface of the metal conductive rod at the position of the bottom of the lower support base plate, and a grounding wire bundle is wound around the bottom end of the metal conductive rod.

[0008] Preferably, a mounting base cover is fixedly connected to the bottom of the lower support base plate, and a mounting side plate is fixedly connected to one side of the lower support base plate.

[0009] Preferably, a temperature sensor body is snapped into the inside of the mounting base, a mounting bolt is threaded to the bottom of the mounting base, and a semi-sealed support cover is fixedly connected to the bottom of the mounting base by the mounting bolt.

[0010] Preferably, the bottom of the adjustable arc-shaped conductive plate is fixedly connected to a sliding block, the top of the sliding block is fixedly connected to a pull handle, the bottom of the sliding block is fixedly connected to a convex slide, and the top of the upper shielding cover is provided with an inner convex circular rail adapted to the convex slide.

[0011] Preferably, the surface of the adjusting arc-shaped conductive plate is provided with a sliding rail, and the surface of the auxiliary metal block is slidably connected to the inner wall of the sliding rail.

[0012] Preferably, the auxiliary metal block is threaded with adjusting bolts on both sides, the bottom end of the adjusting bolts penetrates the auxiliary metal block and extends to the bottom of the auxiliary metal block, and the end of the adjusting bolt located at the bottom of the auxiliary metal block abuts against the surface of the adjusting arc-shaped conductive plate.

[0013] The beneficial effects of this utility model are:

[0014] This invention provides an anti-interference fiber optic grating temperature sensor. By setting a hemispherical shield and a capturing antenna, it can receive and isolate interference signals, thereby preventing the signal from the fiber optic cable from interfering with the temperature sensor body and ensuring stability during use.

[0015] This invention provides an anti-interference fiber optic grating temperature sensor. By setting an adjustable arc-shaped conductive plate and an auxiliary metal block, the adjustable arc-shaped conductive plate can rotate circumferentially on the upper shielding cover, while the auxiliary metal block can slide along the adjustable arc-shaped conductive plate, thereby achieving the function of adjusting the position of the acquisition antenna. It can capture signal sources from multiple directions, further improving its adaptability. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the bottom structure of this utility model; Figure 3 This is a perspective view of the lower support base plate structure in this utility model; Figure 4 This is a perspective view of the bottom structure of the upper shielding cover in this utility model; Figure 5 This is a perspective view of the adjustable arc-shaped conductive plate structure in this utility model; Figure 6 This is a utility model Figure 1 A three-dimensional view of the structure at point A in the middle; Legend: 1. Upper shielding cover; 2. Lower support base plate; 3. Hemispherical shielding cover; 4. Adjustable arc-shaped conductive plate; 5. Auxiliary metal block; 6. Capturing antenna; 7. Metal conductive rod; 8. Fastening nut; 9. Grounding harness; 10. Mounting base cover; 11. Mounting side plate; 12. Temperature sensor body; 13. Mounting bolt; 14. Semi-sealed support base cover; 15. Sliding base block; 16. Pull handle; 17. Convex slide table; 18. Inner convex circular rail; 19. Sliding retaining rail; 20. Adjusting bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Specific implementation examples are given below.

[0019] Please see Figure 1 - Figure 6This utility model provides an anti-interference fiber optic grating temperature sensor, including an upper shielding cover 1 and a lower support base 2. A hemispherical shielding cover 3 is fixedly connected to the top of the upper shielding cover 1. An adjustable arc-shaped conductive plate 4 is slidably connected to the surface of the hemispherical shielding cover 3. An auxiliary metal block 5 is slidably connected to the surface of the adjustable arc-shaped conductive plate 4. A capturing antenna 6 is fixedly connected to the top of the auxiliary metal block 5. Metal conductive rods 7 are fixedly connected to the four corners of the bottom of the upper shielding cover 1. The surface of the lower support base 2 is slidably connected to the surface of the metal conductive rods 7. A fastening nut 8 is threadedly connected to the surface of the metal conductive rods 7 at the bottom of the lower support base 2. A grounding wire bundle 9 is wound around the bottom end of the metal conductive rods 7. During operation, the upper shielding cover 1 is used to shield the signal, and the lower support base 2 supports the upper shielding cover 1. At the same time, the top of the upper shielding cover 1... The hemispherical shield 3 is used to increase the signal shielding range. When there is interference signal, it will be captured by the capturing antenna 6 and then conducted to the auxiliary metal block 5. The auxiliary metal block 5 will then diffuse the signal to the adjusting arc-shaped conductive plate 4 and then guide it to the hemispherical shield 3 for shielding and isolation. The signal on the hemispherical shield 3 will then be further diffused to the upper shielding cover 1 and finally conducted to the ground through the metal conductive rod 7 until it is guided to the ground through the grounding wire bundle 9, thus completing the complete signal isolation closed loop. In addition, the lower support base plate 2 and the upper shielding cover 1 are connected by the fastening nut 8. The whole system, by setting the hemispherical shield 3 and the capturing antenna 6, can receive and isolate interference signals, thereby preventing the signal of the optical fiber cable from interfering with the temperature sensor body 12, thus ensuring the stability during use.

[0020] Furthermore, such as Figure 2 and Figure 3 As shown, a mounting base 10 is fixedly connected to the bottom of the lower support base plate 2, and a mounting side plate 11 is fixedly connected to one side of the lower support base plate 2. A temperature sensor body 12 is snapped into the inside of the mounting base 10, and a mounting bolt 13 is threaded to the bottom of the mounting base 10. A semi-sealed support cover 14 is fixedly connected to the bottom of the mounting base 10 via the mounting bolt 13. During operation, the lower support base plate 2 fixes and supports the mounting base 10, and the mounting side plate 11 is connected to one side of it. The mounting side plate 11 mounts the lower support base plate 2 onto the wall. The temperature sensor body 12 is snapped into the mounting base 10, and its bottom is supported by the semi-sealed support cover 14. The mounting bolt 13 fixes the semi-sealed support cover 14 to the mounting base 10, preventing the temperature sensor body 12 from detaching from the mounting base 10 without affecting its use.

[0021] Furthermore, such as Figure 1 and Figure 5As shown, a sliding base block 15 is fixedly connected to the bottom of the adjustable arc-shaped conductive plate 4, a pull handle 16 is fixedly connected to the top of the sliding base block 15, and a convex slide 17 is fixedly connected to the bottom of the sliding base block 15. An inner convex circular rail 18, adapted to the convex slide 17, is provided on the top of the upper shielding cover plate 1. During operation, the sliding base block 15 can be moved by pulling the handle 16, thereby moving the adjustable arc-shaped conductive plate 4. The convex slide 17 is fixed to the bottom of the sliding base block 15, and is limited by the inner convex circular rail 18. During sliding, the convex slide 17 slides within the inner convex circular rail 18.

[0022] Furthermore, such as Figure 1 , Figure 5 and Figure 6 As shown, a sliding rail 19 is provided on the surface of the adjustable arc-shaped conductive plate 4, and the surface of the auxiliary metal block 5 is slidably connected to the inner wall of the sliding rail 19; adjusting bolts 20 are threadedly connected to both sides of the auxiliary metal block 5, the bottom end of the adjusting bolt 20 passes through the auxiliary metal block 5 and extends to the bottom of the auxiliary metal block 5, and the end of the adjusting bolt 20 located at the bottom of the auxiliary metal block 5 abuts against the surface of the adjustable arc-shaped conductive plate 4. During operation, the sliding rail 19 is set on the adjusting arc-shaped conductive plate 4, and the auxiliary metal block 5 can slide inside the sliding rail 19. At the same time, the sliding rail 19 limits the position of the auxiliary metal block 5. After each adjustment, the adjusting bolt 20 is rotated. The adjusting bolt 20 passes through to the bottom of the auxiliary metal block 5, so that the end of the adjusting bolt 20 at the bottom of the auxiliary metal block 5 abuts against the adjusting arc-shaped conductive plate 4, thereby locking the auxiliary metal block 5 in the corresponding adjustment position. By setting the adjusting arc-shaped conductive plate 4 and the auxiliary metal block 5, the adjusting arc-shaped conductive plate 4 can rotate circumferentially on the upper shielding cover plate 1, and the auxiliary metal block 5 can slide along the adjusting arc-shaped conductive plate 4, thereby realizing the function of adjusting the position of the capturing antenna 6, which can capture signal sources from multiple directions and further improve the adaptability of use.

[0023] Working Principle: Since this technology is used in optical fiber cables, some signals from these cables can interfere with the temperature sensor's signal, affecting its performance. First, the upper shielding cover 1 shields the signal, and the lower support plate 2 supports it. Simultaneously, the top of the upper shielding cover 1 supports a hemispherical shielding cover 3, increasing the signal shielding range. When interference signals are detected, they are captured by the capturing antenna 6 and then conducted to the auxiliary metal block 5. From there, the signal is diffused to the adjusting arc-shaped conductive plate 4, and then onto the hemispherical shielding cover 3 for further shielding. The signal on the hemispherical shielding cover 3 is then further diffused to the upper shielding cover 1, and finally conducted through the metal conductive rod 7 until it reaches the ground via the grounding wire bundle 9, thus completing a complete signal isolation loop. Furthermore, the lower support plate 2 and the upper shielding cover 1 are connected using fastening nuts 8. By using the hemispherical shielding cover 3 and the capturing antenna 6, the system can receive and isolate interference signals, preventing the optical fiber cable signals from interfering with the temperature sensor body 12 and ensuring stability during use. In addition, the lower support base plate 2 is fixedly supported by the mounting base cover 10, and a mounting side plate 11 is connected to one side of it. The mounting side plate 11 is used to mount the lower support base plate 2 on the wall. The temperature sensor body 12 is snapped into the mounting base cover 10, and its bottom is supported by a semi-sealed support cover 14. The mounting bolts 13 fix the semi-sealed support cover 14 to the mounting base cover, which can prevent the temperature sensor body 12 from detaching from the mounting base cover 10 without affecting the use of the temperature sensor body 12. At the same time, when adjusting, the sliding base block 15 can be moved by pulling the handle 16, which in turn moves the adjusting arc conductive plate 4. The convex slide 17 is fixed to the bottom of the sliding base block 15, and the convex slide 17 is limited by the inner convex circular rail 18. When sliding, the convex slide 17 slides within the inner convex circular rail 18. A sliding rail 19 is provided on the adjusting arc-shaped conductive plate 4. The auxiliary metal block 5 can slide inside the sliding rail 19. At the same time, the sliding rail 19 limits the position of the auxiliary metal block 5. After each adjustment, the adjusting bolt 20 is rotated. The adjusting bolt 20 passes through to the bottom of the auxiliary metal block 5, so that the end of the adjusting bolt 20 at the bottom of the auxiliary metal block 5 abuts against the adjusting arc-shaped conductive plate 4, thereby locking the auxiliary metal block 5 in the corresponding adjustment position. By setting the adjusting arc-shaped conductive plate 4 and the auxiliary metal block 5, the adjusting arc-shaped conductive plate 4 can rotate circumferentially on the upper shielding cover plate 1, while the auxiliary metal block 5 can slide along the adjusting arc-shaped conductive plate 4, thereby realizing the function of adjusting the position of the capturing antenna 6. It can capture signal sources from multiple directions and further improve the adaptability of use.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An anti-interference fiber Bragg grating temperature sensor, characterized in that: It includes an upper shielding cover (1) and a lower support base plate (2); a hemispherical shielding cover (3) is fixedly connected to the top of the upper shielding cover (1), an adjustable arc-shaped conductive plate (4) is slidably connected to the surface of the hemispherical shielding cover (3), an auxiliary metal block (5) is slidably connected to the surface of the adjustable arc-shaped conductive plate (4), a capture antenna (6) is fixedly connected to the top of the auxiliary metal block (5), metal conductive rods (7) are fixedly connected to the four corners of the bottom of the upper shielding cover (1), the surface of the lower support base plate (2) is slidably connected to the surface of the metal conductive rod (7), a fastening nut (8) is threadedly connected to the surface of the metal conductive rod (7) at the bottom of the lower support base plate (2), and a grounding wire bundle (9) is wound around the bottom end of the metal conductive rod (7).

2. The anti-interference fiber Bragg grating temperature sensor according to claim 1, characterized in that: The bottom of the lower support base plate (2) is fixedly connected to the mounting base cover (10), and the side of the lower support base plate (2) is fixedly connected to the mounting side plate (11).

3. The anti-interference fiber Bragg grating temperature sensor according to claim 2, characterized in that: The temperature sensor body (12) is snapped into the inside of the mounting base (10), and the bottom of the mounting base (10) is threaded with mounting bolts (13). The bottom of the mounting base (10) is fixedly connected with a semi-sealed support cover (14) by mounting bolts (13).

4. The anti-interference fiber Bragg grating temperature sensor according to claim 1, characterized in that: The bottom of the adjustable arc conductive plate (4) is fixedly connected to a sliding base block (15), the top of the sliding base block (15) is fixedly connected to a pull handle (16), the bottom of the sliding base block (15) is fixedly connected to a convex slide (17), and the top of the upper shielding cover plate (1) is provided with an inner convex circular rail (18) that is adapted to the convex slide (17).

5. The anti-interference fiber Bragg grating temperature sensor according to claim 1, characterized in that: The surface of the adjustable arc-shaped conductive plate (4) is provided with a sliding rail (19), and the surface of the auxiliary metal block (5) is slidably connected to the inner wall of the sliding rail (19).

6. The anti-interference fiber Bragg grating temperature sensor according to claim 1, characterized in that: The auxiliary metal block (5) is threaded with adjusting bolts (20) on both sides. The bottom end of the adjusting bolt (20) passes through the auxiliary metal block (5) and extends to the bottom of the auxiliary metal block (5). One end of the adjusting bolt (20) at the bottom of the auxiliary metal block (5) abuts against the surface of the adjusting arc-shaped conductive plate (4).

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