Application of Fiber Bragg Grating Sensing Technology - Application of FBG Sensor - Application of FBG-Application of FBG Demodulator - Application of FBG Sensing in Industry
FBG Sensing Technology for SHM of Railway Tunnel
In the transportation industry, railway tunnels play a crucial role in the safe and efficient transport of goods and passengers. Therefore, ensuring the health and stability of these structures is of utmost importance. Traditional monitoring methods have limitations, making fiber grating sensing technology a promising solution. In this article, we will discuss the problems that fiber grating sensing technology can solve, and how Beijing Dacheng Yongsheng Technology Co., Ltd.(short for DCYS ) can help to do structural health monitoring(SHM) of railway tunnel.
Fiber Bragg Grating Sensing Principle：
Fiber Bragg gratings (FBGs) are periodic structures that are inscribed in the core of an optical fiber. These structures reflect a specific wavelength of light that is determined by the periodicity of the grating. When the grating is subjected to mechanical or thermal strain, the reflected wavelength changes in a predictable manner. By monitoring the reflected wavelength, changes in strain, temperature, and other parameters can be detected. FBG sensors can be used to monitor a wide range of parameters, including strain, stress, temperature, and vibration.
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Frequently Asked Questions about Railway Tunnels:
Railway tunnels face a range of challenges, including natural disasters, aging infrastructure, and human errors. Some frequently asked questions about railway tunnels include:
What causes tunnel collapse?
How do you detect tunnel deformation?
How do you prevent tunnel fires?
How can you ensure the safety of railway tunnels?
Difficulties in Monitoring Railway Tunnels:
Traditional monitoring methods for railway tunnels, such as visual inspection, are time-consuming and unreliable. Moreover, these methods cannot detect early signs of damage and deformation, which may lead to catastrophic failure. Additionally, the harsh environment inside the tunnels, such as humidity, dust, and electromagnetic interference, poses challenges to monitoring equipment.
What Problems can be Solved by FBG Technology：
Fiber grating sensing technology can help solve the difficulties in monitoring railway tunnels. With FBG sensors installed in critical locations, such as tunnel linings, tracks, and portals, the health and stability of the structure can be monitored in real-time. FBG sensors can detect early signs of deformation, cracks, and corrosion, which enables preventive maintenance and avoids catastrophic failure. Moreover, FBG sensors are immune to electromagnetic interference, making them ideal for harsh environments.
Recommended fiber grating strain sensors:
This product is a high-range fiber bragg grating strain sensor (FBG strain gauge) used for strain measurement. It can be used in a single-ended structure, where it is inserted into the object to be measured for strain measurement. It can also be used in a double-ended structure, where it is fixed with a fixture or bonded directly to the surface for strain measurement, enabling multi-point strain measurement when connected in series. The structure of this product is the same as that of fiber bragg grating stress sensors.
Product Overview:
The OFSCN® high-range fiber bragg grating strain sensor (FBG strain gauge) consists of fiber connectors (FC, SC, LC, ST, etc.), high elastic materials, and single-point FBG encapsulation. Depending on the materials used, it can work at room temperature or a maximum high temperature of 120 degrees Celsius (customizable upon request).
This product is characterized by its small size, light weight, high tensile and compressive strength, waterproof and moisture-proof properties, and full sealing. By utilizing the strain characteristics of FBG, this sensor can be inserted, welded, bonded, or adhered to the internal or surface of the test structure for strain detection and monitoring.
2500με Fiber Bragg Grating Strain Sensor - FBG Strain Gauge - Metal Encapsulation - High Temperature FBG Strain SensorThe product is a fiber Bragg grating strain sensor (FBG strain gauge) encapsulated in seamless steel tube, used for strain measurement. In most cases, it is a single-point single-ended structure, or it can be produced as a multi-point single-ended structure. In a few cases, it can also be a double-ended structure. The deployment method of the product depends on the supporting fixtures, which can be directly inserted into the test object, or installed by surface welding with corresponding fixtures, bolted with drilled holes for fixation, adhesive surface mounting, tied with straps for fixation, or fixed with clamps, among various installation methods. This product is a basic structural product, which can be calibrated as a FBG displacement sensor, or used as a FBG stress sensor.
Product Summary:
The OFSCN® Capillary Seamless Steel Tube Fiber Bragg Grating Strain Sensor (FBG strain gauge) is composed of fiber optic connectors (FC, SC, LC, ST, etc.), stainless steel seamless tubes, and single-point FBG encapsulation.
It can also be customized as a high-temperature resistant fiber Bragg grating strain sensor.
This product features a small size, lightweight, high tensile and compressive strength, waterproof, moisture-proof, and fully sealed characteristics. By utilizing the strain characteristics of the FBG, this sensor can be inserted, clamped, surface-mounted, glued, or embedded into the measured structure to perform strain detection and monitoring.
Beijing Dacheng Yongsheng Technology Co., Ltd.:
Beijing Dacheng Yongsheng Technology Co., Ltd.(short for DCYS) is a professional manufacturer of fiber grating sensors, fiber grating demodulators and system software. Specializing in the production of various fiber grating sensors, including temperature, strain, stress, displacement, vibration, shape sensors, etc. DCYS also produces fiber grating demodulators, and can customize and develop related application software.
Recommended fiber grating demodulator:
This product is produced by DCYS, and it is a high-speed high-frequency fiber Bragg grating demodulator(Interrogator). The fiber grating demodulator is compatible with various specifications and models of OFSCN® fiber bragg grating sensors (temperature, strain, stress FBG sensors, etc.). It features adjustable port density (4, 8, 12, 16 channels) and high-speed high-refresh rate capabilities.
DCYS Helps to Do SHM of Railway Tunnel
With our expertise in fiber grating sensing technology, DCYS can help the transportation industry solve problems in railway tunnel monitoring.
Other Points Need to Be Clarified:
Fiber grating sensing technology provides a promising solution to the health monitoring of railway tunnel structures. With its ability to detect early signs of damage and deformation, FBG sensors can prevent catastrophic failure and enable preventive maintenance. Moreover, the immunity to electromagnetic interference makes FBG sensors ideal for harsh environments, such as railway tunnels. With the expertise of Beijing Dacheng Yongsheng Technology Co., Ltd., the transportation industry can benefit from the application of fiber grating sensing technology in railway tunnel monitoring.