Optical fiber on-line monitoring system

Abstract

The invention provides an optical fiber on-line monitoring system, which comprises an optical fiber sensor unit used for acquiring the physical quantity of an object to be monitored through an optical fiber sensor and converting a signal acquired by the sensor into an optical signal; the optical fiber transmission module is used for receiving the optical signal transmitted by the optical fiber sensor unit and stably transmitting the signal to the optical signal processing unit through an optical fiber line; the optical signal processing unit is used for converting the received optical signal into an electric signal and generating effective monitoring data after filtering, noise removal and analysis; the monitoring terminal is used for receiving the result transmitted by the optical signal processing unit and displaying the state information of the monitored object on a display interface in real time; and the data storage system is used for storing historical monitoring data and assisting a user in performing equipment state analysis and preventive maintenance. The device has excellent performance and wide application prospect, and is particularly suitable for monitoring high-temperature, high-pressure and high-risk special equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fibers, and in particular relates to an optical fiber online monitoring system. Background Art

[0002] With the rapid development of industrial technology, special equipment (such as boilers, pressure vessels, power equipment, lifting equipment, etc.) are increasingly used in various fields. These equipment operate in extreme working environments such as high temperature, high pressure, and strong electromagnetic fields. Once a failure occurs, it often leads to serious safety accidents. Therefore, online monitoring of special equipment has become a key means to ensure the safe operation of equipment and reduce the risk of accidents.

[0003] Traditional equipment monitoring methods mainly rely on manual inspections and regular maintenance. This method not only relies on manual judgment, but also due to the complexity and danger of the working environment, the inspectors may not be able to find potential equipment failures in time. In addition, traditional monitoring methods often cannot provide real-time and comprehensive equipment status data, nor are they easy to perform long-term trend analysis and fault prediction. Therefore, there is an urgent need for a more accurate, reliable, and real-time monitoring method to ensure that the equipment can operate in a safe and stable state.

[0004] Fiber optic sensing technology has become an ideal choice for online monitoring of special equipment due to its high precision, high sensitivity, anti-electromagnetic interference, high temperature resistance, and corrosion resistance. Fiber optic sensors can monitor key parameters such as temperature, pressure, and strain of equipment in real time, and transmit optical signals to avoid the problems of electromagnetic interference and signal attenuation of traditional sensors. Therefore, fiber optic sensing technology is widely used in monitoring tasks in high temperature, high pressure, and high-risk environments.

[0005] However, existing fiber-optic online monitoring systems generally have problems such as limited signal transmission distance, complex data processing, and lack of intelligent analysis, which cannot meet the real-time monitoring needs of large-scale equipment. Therefore, the development of an efficient, stable, and intelligent fiber-optic online monitoring system has become an urgent need to improve the safety and maintenance management level of special equipment. Summary of the invention

[0006] The present invention provides an optical fiber online monitoring system, which can realize online monitoring of multiple physical or chemical parameters in the target environment through optical fiber sensing technology. The system can obtain monitoring data in real time through the cooperation of optical fiber sensors and data acquisition devices, and provide users with high-precision, stable and sustainable monitoring results.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: An optical fiber online monitoring system, comprising: The optical fiber sensor unit is used to obtain the physical quantity of the object to be monitored through the optical fiber sensor and convert the signal collected by the sensor into an optical signal; The optical fiber transmission module is used to receive the optical signal transmitted by the optical fiber sensor unit and stably transmit the signal to the optical signal processing unit through the optical fiber line; An optical signal processing unit is used to convert the received optical signal into an electrical signal, and generate effective monitoring data after filtering, noise removal and analysis; The monitoring terminal is used to receive the results transmitted by the optical signal processing unit and display the status information of the monitored object in real time on the display interface; The data storage system is used to store historical monitoring data to assist users in equipment status analysis and preventive maintenance.

[0008] Furthermore, the optical fiber sensor unit is one or more of a temperature sensor, a pressure sensor or a strain sensor.

[0009] Furthermore, the optical fiber transmission module includes an optical fiber line, an optical fiber connector and an optical signal amplifier. The optical signal amplifier is used to amplify the signal strength during the long-distance transmission of the optical signal; The optical fiber line is used to transmit optical signals; The optical fiber connector is used to connect different optical fiber components to ensure loss-free transmission of optical signals.

[0010] Furthermore, the optical fiber line is a single-mode optical fiber or a multi-mode optical fiber, and the specific selection depends on the transmission distance, bandwidth requirements and signal type.

[0011] Furthermore, the optical signal processing unit includes: A photoelectric conversion module, used for converting the optical signal received from the optical fiber transmission module into an electrical signal; Signal filtering module, used to remove noise components in the signal; Data analysis module: used to analyze the filtered electrical signals, generate real-time monitoring data and perform anomaly detection. The analysis results are displayed through the monitoring terminal.

[0012] Furthermore, the monitoring terminal includes: A graphical display module is used to display the monitoring data on the screen in the form of graphics; An alarm module is used to trigger an alarm when the monitoring data exceeds a preset safety threshold; the alarm modes include sound alarm, visual alarm, and SMS / email notification; User interaction interface, used to view real-time data, historical records, alarm information and make configuration settings.

[0013] Furthermore, the data storage system comprises: Data storage module, used to store historical monitoring data and support long-term data preservation; Data backup module, regularly backs up monitoring data to avoid data loss; The data retrieval module is used to provide data retrieval functions, and users can query data based on time and parameter type.

[0014] Furthermore, the system supports remote access function, and users can remotely access the monitoring terminal through the Internet or intranet to view real-time monitoring data, historical records, alarm information, and perform system configuration and management.

[0015] Compared with the prior art, the present invention has the following advantages: The optical fiber online monitoring system of the present invention has the advantages of high precision, long distance, low loss, etc. It uses optical fiber sensors to monitor key physical quantities such as temperature, pressure and strain of special equipment in real time, and can provide reliable monitoring data in harsh environments. The system ensures the stability of the signal through the optical fiber transmission module, and the optical signal processing unit realizes efficient data analysis and anomaly detection, and monitors the equipment status in real time. The monitoring terminal provides visual data display and alarm functions to promptly remind equipment anomalies and avoid failures. The system supports data storage, trend analysis and remote access, enhances the intelligence and flexibility of equipment management, has excellent performance and broad application prospects, and is particularly suitable for high-temperature, high-pressure and high-risk special equipment monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the invention. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0017] Figure 1 A schematic diagram of the system structure of the present invention is shown. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] like Figure 1As shown, this embodiment describes in detail an optical fiber online monitoring system, which is particularly used in the field of special equipment. The system can provide accurate data support by real-time monitoring of various physical quantities of the equipment (such as temperature, pressure, strain, etc.), ensuring that the equipment maintains the best working state during operation, reducing the probability of failure, and providing important reference for equipment maintenance. The following are the specific implementation details of the optical fiber online monitoring system.

[0020] 1. Fiber optic sensor unit The optical fiber sensor unit is the data acquisition part of the system, responsible for obtaining the physical quantity information of the device to be monitored. The optical fiber sensor unit in this embodiment is mainly composed of the following sensors: Temperature sensor: It uses Brillouin fiber optic sensor (FBG) technology to measure temperature through small frequency changes caused by temperature in the optical fiber.

[0021] Pressure sensor: used to monitor the pressure changes of gas, liquid or steam in the equipment. The pressure sensor adopts fiber grating technology, which can change the reflection frequency of the optical signal when it is subjected to external pressure changes, accurately reflecting the pressure changes in the equipment. It is widely used in high-pressure equipment such as pressure vessels, gas storage tanks, oil and gas pipelines, etc.

[0022] Strain sensor: used to monitor the deformation that may occur in the equipment during operation. The strain sensor uses fiber grating (FBG) technology to calculate the strain by measuring the tiny displacement of the fiber grating. In lifting equipment, bridges, large machinery and other equipment, strain sensors can effectively monitor the stress of the equipment and detect potential structural damage in time.

[0023] The optical fiber sensor converts the collected physical signals into optical signals through the optical fiber line and transmits them to the subsequent optical fiber transmission module. As the optical fiber sensor itself has the characteristics of anti-electromagnetic interference, high temperature resistance, corrosion resistance, etc., it can work stably in harsh environments, so it is very suitable for the field of special equipment.

[0024] 2. Fiber optic transmission module The optical fiber transmission module is responsible for stably transmitting the optical signal collected by the optical fiber sensor unit to the optical signal processing unit. This module consists of the following important components: Optical fiber line: This implementation uses single-mode optical fiber for the transmission of optical signals. Single-mode optical fiber can reduce signal attenuation, is suitable for long-distance transmission, and ensures data integrity. Optical signals have almost no loss when transmitted in optical fiber, so they are suitable for long-distance and high-bandwidth requirements.

[0025] Fiber optic connector: used to connect different fiber optic components to ensure smooth signal transmission. Fiber optic connectors use a precise mechanical structure to ensure that there is no loss of optical signals at the connector.

[0026] Optical signal amplifier: During long-distance transmission, the optical signal will attenuate. The optical signal amplifier can amplify the signal strength when the optical signal is weakened, ensuring that the signal maintains sufficient strength during transmission and reducing signal loss and errors.

[0027] 3. Optical signal processing unit The optical signal processing unit is the core part of the entire optical fiber online monitoring system. Its function is to process and analyze the optical signal transmitted from the optical fiber transmission module to generate the final monitoring data. Specific functions include: Photoelectric conversion module: This module uses a photodiode or a photomultiplier tube (PMT) to convert optical signals into electrical signals. Due to the characteristics of optical fiber signal transmission, the received signal is still an optical signal and must be converted to photoelectricity before further processing.

[0028] Signal filtering module: After the optical signal is converted into an electrical signal, it may be interfered by noise, which may affect the accuracy of the measurement. The signal filtering module removes the noise components in the signal through different filtering technologies such as high-pass, low-pass, and band-pass. In this way, the filtered signal will be purer, which is convenient for subsequent signal analysis.

[0029] Data analysis module: After the signal is filtered, the data analysis module will further process the signal, generate real-time monitoring data and perform anomaly detection. For example, when the temperature detected by the temperature sensor exceeds the set safety threshold, the data analysis module will issue an alarm signal to indicate that the equipment may be faulty. The module can also perform trend analysis to identify potential faults or equipment aging, helping users perform preventive maintenance.

[0030] 4. Monitoring terminal The monitoring terminal is the main interface for users to interact with the fiber online monitoring system, and is responsible for displaying monitoring results and providing alarms and configuration settings. Specific functions include: Graphical display module: Displays real-time monitoring data on the screen in a graphical manner. Different monitoring parameters (such as temperature, pressure, strain, etc.) can be intuitively displayed in the form of line graphs, curve graphs, dashboards, etc. Users can clearly see the current status and health level of the equipment.

[0031] Alarm module: When the monitored data exceeds the preset safety threshold, the alarm module will automatically trigger an alarm. The alarm modes include: sound alarm, visual alarm (such as red warning on the screen), SMS or email notification.

[0032] User interaction interface: Users can use this interface to perform configuration settings, view real-time data, query historical records, modify threshold settings, etc. The system provides a friendly interface to facilitate equipment managers to monitor and adjust.

[0033] 5. Data storage system The data storage system is responsible for storing all historical monitoring data and supports long-term data storage and query. The system implements data storage and management through the following sub-modules: Data storage module: All monitoring data will be stored in the database, including real-time monitoring data, historical records, fault alarm information, etc. The database structure can support fast query, ensuring that users can easily retrieve and trace data.

[0034] Data backup module: To prevent data loss, the system will regularly back up monitoring data. The backup data can be stored in the cloud or local server to ensure that data can be quickly restored in the event of a failure or system crash.

[0035] Data retrieval module: This module provides a convenient data query function, and users can quickly retrieve historical data based on time, parameter type, equipment number, etc. This not only helps to monitor the equipment status in real time, but also provides data support for the later analysis, maintenance and troubleshooting of the equipment.

[0036] 6. Remote access function The system also supports remote access. Equipment managers can use computers, mobile phones, tablets and other devices to view the real-time monitoring data, historical records and alarm information of the equipment anytime and anywhere through the Internet or intranet. The remote access function is very important, especially for special equipment that needs to be monitored across regions, such as oil platforms, remote power stations, etc., which can easily perform remote operation, fault diagnosis, maintenance and adjustment.

[0037] Remote access can be achieved through a dedicated client, mobile app or web interface. Users can not only view data, but also perform remote configuration settings, alarm management and other operations, greatly improving the flexibility and convenience of the monitoring system.

[0038] 7. Special equipment application examples This optical fiber online monitoring system is widely used in the field of special equipment, especially for the following equipment: Boiler monitoring: Fiber optic sensors are used to monitor key parameters such as temperature and pressure inside the boiler in real time to prevent accidents such as explosion and leakage due to overheating or overpressure.

[0039] Pressure vessel monitoring: used to monitor pressure changes in high-pressure gas, liquid or steam storage equipment to ensure that the container operates within a safe pressure range and prevent explosions or leaks.

[0040] Pipeline monitoring: In high-risk locations such as oil and gas pipelines and chemical transportation pipelines, the system can monitor parameters such as temperature, pressure, strain, etc. in the pipeline to detect leaks, corrosion or other safety hazards in a timely manner.

[0041] Power equipment monitoring: used to monitor the temperature, pressure, vibration, etc. of power equipment such as transformers, distribution equipment, cables, etc. to ensure the stable operation of power equipment and prevent equipment failures in a timely manner.

[0042] The optical fiber online monitoring system of this embodiment combines high-precision optical fiber sensors, advanced optical signal processing technology, and powerful data analysis and storage capabilities to provide a safe, real-time, and reliable online monitoring solution for special equipment. Through this system, special equipment managers can grasp the health status of the equipment at any time, discover and deal with potential problems in a timely manner, and greatly improve the safety and reliability of equipment operation.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An optical fiber online monitoring system, characterized in that: include: The optical fiber sensor unit is used to obtain the physical quantity of the object to be monitored through the optical fiber sensor and convert the signal collected by the sensor into an optical signal; The optical fiber transmission module is used to receive the optical signal transmitted by the optical fiber sensor unit and stably transmit the signal to the optical signal processing unit through the optical fiber line; An optical signal processing unit is used to convert the received optical signal into an electrical signal, and generate effective monitoring data after filtering, noise removal and analysis; The monitoring terminal is used to receive the results transmitted by the optical signal processing unit and display the status information of the monitored object in real time on the display interface; The data storage system is used to store historical monitoring data to assist users in equipment status analysis and preventive maintenance.

2. The optical fiber online monitoring system according to claim 1, characterized in that: The optical fiber sensor unit is one or more of a temperature sensor, a pressure sensor or a strain sensor.

3. The optical fiber online monitoring system according to claim 1, characterized in that: The optical fiber transmission module includes an optical fiber line, an optical fiber connector and an optical signal amplifier. The optical signal amplifier is used to amplify the signal strength during the long-distance transmission of the optical signal; The optical fiber line is used to transmit optical signals; The optical fiber connector is used to connect different optical fiber components to ensure loss-free transmission of optical signals.

4. The optical fiber online monitoring system according to claim 1, characterized in that: The optical fiber line is a single-mode optical fiber or a multi-mode optical fiber, and the specific selection depends on the transmission distance, bandwidth requirements and signal type.

5. The optical fiber online monitoring system according to claim 1, characterized in that: The optical signal processing unit comprises: A photoelectric conversion module, used for converting the optical signal received from the optical fiber transmission module into an electrical signal; Signal filtering module, used to remove noise components in the signal; Data analysis module: used to analyze the filtered electrical signals, generate real-time monitoring data and perform anomaly detection. The analysis results are displayed through the monitoring terminal.

6. The optical fiber online monitoring system according to claim 1, characterized in that: The monitoring terminal comprises: A graphical display module is used to display the monitoring data on the screen in the form of graphics; An alarm module is used to trigger an alarm when the monitoring data exceeds a preset safety threshold; the alarm modes include sound alarm, visual alarm, and SMS / email notification; User interaction interface, used to view real-time data, historical records, alarm information and make configuration settings.

7. The optical fiber online monitoring system according to claim 1, characterized in that: The data storage system comprises: Data storage module, used to store historical monitoring data and support long-term data preservation; Data backup module, regularly backs up monitoring data to avoid data loss; The data retrieval module is used to provide data retrieval functions, and users can query data based on time and parameter type.

8. The optical fiber online monitoring system according to claim 1, characterized in that: The system also supports remote access function, which allows users to remotely access the monitoring terminal through the Internet or intranet to view real-time monitoring data, historical records, alarm information, and perform system configuration and management.

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