Optical fiber loop temperature monitoring device with warning function

Abstract

The utility model relates to optical fiber ring temperature monitoring technical field discloses a kind of optical fiber ring temperature monitoring devices with warning function, including base, the ceramic support for carrying optical fiber ring is fixedly installed on the base;The inner ring, the middle ring and the outer ring are coaxially arranged from top to bottom in the ceramic support, the upper surface of the inner ring is fixedly installed with FBG temperature sensor one, the upper surface of the middle ring is fixedly installed with FBG temperature sensor two, the upper surface of the outer ring is fixedly installed with FBG temperature sensor three;FBG temperature sensor one, FBG temperature sensor two, FBG temperature sensor three are all connected with optical coupler signal by transmission optical fiber.Through setting FBG temperature sensor one, two, three in the inner ring, the middle ring, the outer ring of ceramic support respectively, the synchronous monitoring of different area temperature of optical fiber ring is realized, the problem that traditional single-point monitoring cannot capture local temperature difference is solved, ensure that there is no temperature monitoring blind area, accurately reflect the overall temperature distribution state of optical fiber ring.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic ring temperature monitoring technology, specifically to a fiber optic ring temperature monitoring device with an alarm function. Background Technology

[0002] As a core component of fiber optic inertial devices (such as fiber optic gyroscopes) and distributed fiber optic sensing systems, fiber optic loops are extremely sensitive to temperature changes in their optical performance (such as phase consistency and polarization crosstalk). When the ambient temperature or the fiber's own operating temperature fluctuates, the thermal expansion and contraction of the fiber and changes in the temperature coefficient of refractive index can cause phase drift and polarization mode dispersion in the fiber optic loop, severely affecting the measurement accuracy and reliability of the equipment.

[0003] Traditional electrical sensors such as thermocouples and thermistors are susceptible to electromagnetic interference and mostly provide single-point monitoring, making it impossible to accurately capture temperature differences in different areas of the fiber optic ring (inner ring, middle ring, outer ring). This can easily lead to monitoring blind spots such as localized overheating or uneven temperature distribution. Early fiber optic grating (FBG) monitoring solutions often suffered from poor sensor placement and low demodulation accuracy, resulting in large temperature measurement errors (typically ≥ ±0.5℃), which failed to meet the high-precision temperature monitoring requirements of fiber optic rings (generally ≤ ±0.2℃).

[0004] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a fiber optic ring temperature monitoring device with an alarm function. Utility Model Content

[0005] The purpose of this invention is to provide a fiber optic ring temperature monitoring device with an alarm function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A technical solution for a fiber optic ring temperature monitoring device with alarm function includes a base on which a ceramic bracket for supporting the fiber optic ring is fixedly mounted. The ceramic bracket has an inner ring, a middle ring, and an outer ring coaxially arranged from top to bottom. An FBG temperature sensor (first type) is fixedly mounted on the upper surface of the inner ring, an FBG temperature sensor (second type) is fixedly mounted on the upper surface of the middle ring, and an FBG temperature sensor (third type) is fixedly mounted on the upper surface of the outer ring. All three FBG temperature sensors are connected to an optical coupler via a transmission optical fiber. The optical coupler is electrically connected to a demodulation module, the demodulation module is electrically connected to a monitoring host, and the monitoring host is electrically connected to a multi-level alarm module. The monitoring host receives temperature data transmitted by the demodulation module and compares it with a preset threshold, triggering the multi-level alarm module to execute corresponding alarm actions.

[0007] As a preferred technical solution, the ceramic bracket is made of alumina ceramic material, and its inner ring, middle ring and outer ring are integrally formed structures, with a radial distance of 5-10mm between them; the upper surface of the ceramic bracket is provided with annular slots for positioning the fiber optic rings, and the annular slots are matched one-to-one with the inner ring, middle ring and outer ring.

[0008] As a preferred technical solution, the FBG temperature sensor one, FBG temperature sensor two, and FBG temperature sensor three are all bonded and fixed to the upper surface of the corresponding ring body by high-temperature resistant adhesive, and the sensitive areas of the three are all in contact with the lower surface of the optical fiber ring; the transmission optical fiber is routed along the groove opened on the side wall of the ceramic support, and the inner wall of the groove is provided with a wear-resistant rubber layer.

[0009] As a preferred technical solution, the demodulation module has a temperature demodulation accuracy of ≤±0.1℃, and its built-in optical signal amplification unit and filtering unit are used to enhance the stability of the transmitted signal of the FBG temperature sensor; the optical coupler is a 1×3 type optical coupler, which can realize the convergence and transmission of signals from three FBG temperature sensors.

[0010] As a preferred technical solution, the monitoring host has a built-in data storage module and threshold setting unit, which can store 72 hours of continuous temperature monitoring data and supports user-defined temperature warning thresholds (including first-level warning thresholds and second-level warning thresholds); the monitoring host is also equipped with a touch screen display for real-time display of temperature data and warning status of each area.

[0011] As a preferred technical solution, the multi-level warning module includes a primary warning light, a secondary warning light, and a buzzer; when the monitored temperature exceeds the primary warning threshold, the primary warning light illuminates and the buzzer sounds intermittently; when the monitored temperature exceeds the secondary warning threshold, the secondary warning light illuminates and the buzzer sounds continuously; the multi-level warning module also supports signal linkage with an external control system and can output an alarm trigger signal.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting FBG temperature sensors one, two, and three in the inner ring, middle ring, and outer ring of the ceramic support respectively, the temperature of different areas of the fiber optic ring can be monitored synchronously, which solves the problem that traditional single-point monitoring cannot capture local temperature differences, ensures no temperature monitoring blind spots, and accurately reflects the overall temperature distribution of the fiber optic ring.

[0013] The FBG temperature sensor itself is not subject to electromagnetic interference and is suitable for the working environment of fiber optic rings. When paired with a high-precision demodulation module (demodulation accuracy ≤ ±0.1℃), the overall temperature measurement error is ≤ ±0.2℃, meeting the high-precision requirements of fiber optic rings for temperature monitoring and effectively avoiding equipment performance deviations caused by temperature measurement errors. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a fiber optic loop temperature monitoring device with an alarm function; Figure 2 This is a schematic diagram of a fiber optic loop temperature monitoring device with an alarm function.

[0015] In the attached diagram, the following are the reference numerals: 1. Base; 2. Ceramic bracket; 21. Inner ring; 211. FBG temperature sensor one; 22. Middle ring; 221. FBG temperature sensor two; 23. Outer ring; 231. FBG temperature sensor three; 3. Monitoring host; 4. Demodulation module; 5. Optical coupler; 6. Multi-level warning module. Detailed Implementation

[0016] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0017] like Figure 1 , Figure 2 As shown, this utility model provides a technical solution for a fiber optic ring temperature monitoring device with an alarm function: it includes a base 1, on which a ceramic bracket 2 for supporting the fiber optic ring is fixedly installed; A ceramic bracket 2 made of alumina ceramic material is fixedly installed on the base 1. The inner ring 21, middle ring 22 and outer ring 23 of the ceramic bracket 2 are integrally formed structures, and the radial distance between the three is set to 5-10mm. Annular slots are formed on the upper surface of the ceramic bracket 2 to match the inner ring 21, middle ring 22 and outer ring 23 one by one, for positioning the fiber optic ring.

[0018] Using a high-temperature resistant adhesive, FBG temperature sensor 211 is attached and fixed to the upper surface of the inner ring 21, FBG temperature sensor 221 is attached and fixed to the upper surface of the middle ring 22, and FBG temperature sensor 231 is attached and fixed to the upper surface of the outer ring 23, ensuring that the sensitive areas of the three FBG temperature sensors are in close contact with the lower surface of the fiber optic ring.

[0019] The transmission optical fiber is routed along a groove cut into the side wall of the ceramic support 2. The inner wall of the groove is lined with an anti-abrasion rubber layer to protect the transmission optical fiber. The three FBG temperature sensors are connected to the 1×3 type optical coupler 5 via the transmission optical fiber to achieve signal convergence and transmission from the three FBG temperature sensors.

[0020] The optocoupler 5 is electrically connected to the demodulation module 4. The demodulation module 4 has a temperature demodulation accuracy of ≤±0.1℃ and its built-in optical signal amplification and filtering unit enhances the stability of the FBG temperature sensor's transmitted signal. The demodulation module 4 is then electrically connected to the monitoring host 3. The monitoring host 3 has a built-in data storage module and threshold setting unit, capable of storing 72 hours of continuous temperature monitoring data. It also supports user-defined temperature warning thresholds (including first-level and second-level warning thresholds). The monitoring host 3 is equipped with a touchscreen display for real-time display of temperature data and warning status for each area. Finally, the monitoring host 3 is electrically connected to the multi-level warning module 6, which includes a first-level warning light, a second-level warning light, and a buzzer.

[0021] Place the fiber optic ring into the annular slot of the ceramic bracket 2 to complete the installation and commissioning of the device. After starting the device, FBG temperature sensor 1 (211), FBG temperature sensor 221, and FBG temperature sensor 3 (231) monitor the temperature of the inner ring 21, middle ring 22, and outer ring 23 of the fiber optic ring in real time, respectively, and transmit the temperature signals to the optical coupler 5 through the transmission fiber. The optical coupler 5 converges the signals and transmits them to the demodulation module 4. The demodulation module 4 demodulates the received optical signals, converts the optical signals into temperature data, and transmits the temperature data to the monitoring host 3.

[0022] After receiving the temperature data transmitted by the demodulation module 4, the monitoring host 3 compares it with the preset first-level and second-level warning thresholds. If the monitored temperature does not exceed any warning threshold, the touch screen of the monitoring host 3 displays the temperature data of each area normally, and the multi-level warning module 6 does not perform any warning action.

[0023] When the monitored temperature exceeds the first-level warning threshold, the monitoring host 3 triggers the multi-level warning module 6, the first-level warning light illuminates and the buzzer sounds an intermittent alarm, and the first-level warning status is displayed on the touch screen.

[0024] When the monitored temperature exceeds the level 2 warning threshold, the monitoring host 3 triggers the multi-level warning module 6, the level 2 warning light illuminates and the buzzer sounds continuously, while the level 2 warning status is displayed on the touch screen. Furthermore, the multi-level warning module 6 also supports signal linkage with external control systems, and can output an alarm trigger signal so that the external control system can take further measures.

[0025] The working principle and usage process of this utility model: After assembling the various components of this solution in sequence, work according to the above implementation methods according to actual needs to complete all working steps.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A fiber optic loop temperature monitoring device with alarm function, characterized in that, The system includes a base (1), on which a ceramic support (2) for supporting the fiber optic ring is fixedly mounted; the ceramic support (2) is coaxially arranged from top to bottom with an inner ring (21), a middle ring (22), and an outer ring (23); an FBG temperature sensor one (211) is fixedly mounted on the upper surface of the inner ring (21), an FBG temperature sensor two (221) is fixedly mounted on the upper surface of the middle ring (22), and an FBG temperature sensor three (231) is fixedly mounted on the upper surface of the outer ring (23); the FBG temperature sensor one (211), FBG temperature sensor two (221), and FBG temperature sensor three (231) are fixedly mounted on the upper surface of the outer ring (23); Temperature sensor three (231) is connected to optical coupler (5) via optical fiber. Optical coupler (5) is electrically connected to demodulation module (4). Demodulation module (4) is electrically connected to monitoring host (3). Monitoring host (3) is electrically connected to multi-level warning module (6). Monitoring host (3) is used to receive temperature data transmitted by demodulation module (4) and compare it with preset threshold, triggering multi-level warning module (6) to perform corresponding warning actions.

2. The fiber optic loop temperature monitoring device with alarm function according to claim 1, characterized in that: The ceramic bracket (2) is made of alumina ceramic material. Its inner ring (21), middle ring (22) and outer ring (23) are integrally formed structures, and the radial distance between the three is 5-10mm. The upper surface of the ceramic bracket (2) is provided with an annular slot for positioning the fiber optic ring. The annular slot corresponds to and is adapted to the inner ring (21), middle ring (22) and outer ring (23).

3. The fiber optic loop temperature monitoring device with alarm function according to claim 2, characterized in that: The FBG temperature sensor 1 (211), FBG temperature sensor 2 (221), and FBG temperature sensor 3 (231) are all fixed to the upper surface of the corresponding ring body by high temperature resistant adhesive, and the sensitive areas of the three are all attached to the lower surface of the optical fiber ring; the transmission optical fiber is routed along the wire groove opened on the side wall of the ceramic bracket (2), and the inner wall of the wire groove is provided with a wear-resistant rubber layer.

4. The fiber optic loop temperature monitoring device with alarm function according to claim 3, characterized in that: The demodulation module (4) has a temperature demodulation accuracy of ≤ ±0.1℃. It has a built-in optical signal amplification unit and a filtering unit to enhance the stability of the FBG temperature sensor transmission signal. The optical coupler (5) is a 1×3 type optical coupler, which can realize the convergence and transmission of signals from three FBG temperature sensors.

5. The fiber optic loop temperature monitoring device with alarm function according to claim 4, characterized in that: The monitoring host (3) has a built-in data storage module and threshold setting unit, which can store temperature monitoring data for 72 consecutive hours and supports user-defined temperature warning thresholds; the monitoring host (3) is also equipped with a touch screen for real-time display of temperature data and warning status of each area.

6. The fiber optic loop temperature monitoring device with alarm function according to claim 5, characterized in that: The multi-level warning module (6) includes a first-level warning light, a second-level warning light, and a buzzer.

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