Fiber Bragg Grating Strain Sensor - FBG Strain Gauge - Concept Classification Principle Temperature Compensation Application Price
Table of Contents:
Ⅰ. Relationship among OFSCN® Fiber Bragg Grating Strain Sensor, OFSCN® Fiber Bragg Grating Displacement Sensor, OFSCN® Fiber Bragg Grating Stress Sensor and OFSCN® Fiber Bragg Grating Deformation Sensor
The OFSCN® Fiber Bragg Grating Strain Sensor is the most common and widely used sensor among OFSCN® Fiber Bragg Grating Sensors. It shares a direct correspondence with OFSCN® Fiber Bragg Grating Displacement Sensor, OFSCN® Fiber Bragg Grating Stress Sensor and OFSCN® Fiber Bragg Grating Deformation Sensor, so they have the same structure.
1. Relationship between OFSCN® Fiber Bragg Grating Strain Sensor and OFSCN® Fiber Bragg Grating Displacement Sensor
The OFSCN® Fiber Bragg Grating Displacement Sensor is an application that extracts parameters from OFSCN® Fiber Bragg Grating Strain Sensor. The relationship is given by: Displacement = Total Length × Strain. Therefore, the structure of OFSCN® Fiber Bragg Grating Displacement Sensor is the same as OFSCN® Fiber Bragg Grating Strain Sensor, with the difference lying in the calibration formula, which corresponds length to wavelength values.
2. Relationship between OFSCN® Fiber Bragg Grating Strain Sensor and OFSCN® Fiber Bragg Grating Stress Sensor
The OFSCN® Fiber Bragg Grating Stress Sensor is a calculating application of OFSCN® Fiber Bragg Grating Strain Sensor. The relationship is given by: Measured Stress = Elastic Modulus of the Measured Object × Strain. Therefore, the structure of OFSCN® Fiber Bragg Grating Stress Sensor is the same as OFSCN® Fiber Bragg Grating Strain Sensor. However, as the tested materials differ after purchasing the OFSCN® Fiber Bragg Grating Stress Sensor, the calibration formula corresponds micro-strain to wavelength values.
3. Relationship between OFSCN® Fiber Bragg Grating Strain Sensor and OFSCN® Fiber Bragg Grating Deformation Sensor
"OFSCN® Fiber Bragg Grating Deformation Sensor" is not a precise term. Deformation can be expressed as displacement - in this case, corresponding to OFSCN® Fiber Bragg Grating Displacement Sensor, or it can be expressed as strain - in this case, corresponding to OFSCN® Fiber Bragg Grating Strain Sensor.
Ⅱ. What is an OFSCN® Fiber Bragg Grating Strain Sensor? Basic Concept of FBG Strain Gauge
The OFSCN® Fiber Bragg Grating Strain Sensor is a type of sensor that uses a Fiber Bragg Grating (FBG) as a sensitive element. It is combined with an FBG demodulator(FBG analyzer ,FBG Interrogator) and fixed to the measured object for strain measurement, detection, and monitoring.
The OFSCN® Fiber Bragg Grating Strain Sensor is also known as an FBG Strain Gauge. It belongs to the category of Fiber Bragg Grating Sensors and is a type of fiber sensor. In terms of function, it is classified as a strain sensor.
Ⅲ. Classification of OFSCN® Fiber Bragg Grating Strain Sensors
OFSCN® Fiber Bragg Grating Strain Sensors can be classified based on the different encapsulation materials, which result in different measurement ranges.
Currently, there are three types: Regular OFSCN® Fiber Bragg Grating Strain Sensors - metal encapsulation with a maximum measurement range of 2000 με (microstrain), Large Measurement Range OFSCN® Fiber Bragg Grating Strain Sensors - polymer material encapsulation with a maximum measurement range of 10,000 με (microstrain), and Ultra-Large Measurement Range OFSCN® Fiber Bragg Grating Strain Sensors - a hybrid encapsulation of polymer material and elastomer, with a minimum measurement range greater than 10,000 με (deformation rate of 1%) and typical measurement ranges of 100,000 με (microstrain) for a 10% deformation rate and 300,000 με (microstrain) for a 30% deformation rate.
OFSCN® Fiber Bragg Grating Strain Sensors can also be classified based on the number of FBG strain measurement points, such as single-point and multi-point sensors.
They can also be categorized based on different encapsulation materials, structures, and deployment processes, including tube-type, wafer-type (surface-mounted), and surface FBG strain sensors.
There are many other classification methods for OFSCN® Fiber Bragg Grating Strain Sensors, and DCYS can provide customized sensors of different types, which will not be further elaborated here...
Ⅳ. Principle of Strain Measurement for OFSCN® Fiber Bragg Grating Strain Sensor
OFSCN® Fiber Bragg Grating Strain Sensor can be used for strain and deformation measurements based on the following principle:
Ⅴ. Temperature Compensation Principle for OFSCN® Fiber Bragg Grating Strain Sensor
When used for strain and deformation measurements, OFSCN® Fiber Bragg Grating Strain Sensor needs to compensate for temperature effects. This process is known as temperature compensation for OFSCN® Fiber Bragg Grating Strain Sensor, and its principle is as follows:
Principle and Scheme of Temperature Compensation for Fiber Bragg Grating (FBG) Strain Sensors
Ⅵ. Application of OFSCN® Fiber Bragg Grating Strain Sensor - Civil Engineering Applications
OFSCN® Fiber Bragg Grating Strain Sensor is the most widely used among all optical fiber sensors. It can be widely applied in various environments for strain measurements, including civil engineering, bridges, tunnels, buildings, large mechanical components, slope applications, excavation projects, and other fields for strain and deformation measurements, monitoring, and testing. It also serves as the foundation for producing other types of FBG sensors. Its applications are exceptionally diverse, and further details are not elaborated here by DCYS.
Ⅶ. Structure of OFSCN® Fiber Bragg Grating Strain Sensor
DCYS produces the OFSCN® capillary series FBG strain sensors, which can be customized with various structures. The standard structures are as follows:
 |
| Structure diagram of OFSCN® Capillary seamless steel tube fiber Bragg grating strain sensor (single-ended ) |
 |
| Structure diagram of OFSCN® Tubular large-range fiber Bragg grating strain sensor (double-ended, can be connected in series) |
Ⅷ. Measuring Range of OFSCN® Fiber Bragg Grating Strain Sensor
OFSCN® capillary series fiber Bragg grating strain sensors produced by DCYS, have the following measuring ranges:
3、Large-range Fiber Bragg Grating Strain Sensor - Bragg FBG strain gauge - Metal protection, measuring range: 30000με (customizable up to a maximum of 50000με)
4、Ultra-Large Range Fiber Bragg Grating Strain Sensor - Bragg FBG strain gauge - 10% to 30% strain
Ⅸ. Model and Parameters of OFSCN Fiber Bragg Grating Strain Sensor
OFSCN® capillary series fiber Bragg grating strain sensors, which use DCYS's proprietary "stainless steel seamless tube encapsulation technology" and "high molecular material encapsulation technology" for FBG encapsulation, come in various models.
The product structure is simple and can be either single-ended, encapsulating a single-point FBG for insertion into the measured object for strain measurement, or double-ended for immersion or surface mounting for strain measurement, achieving multi-point quasi-distributed strain measurement in series.
The specific model numbers and parameters of OFSCN® capillary series fiber Bragg grating strain sensors designed by DCYS can be found in the related product introduction.
Ⅹ. Installation and Placement of OFSCN® Fiber Bragg Grating Strain Sensor
OFSCN® capillary® series fiber Bragg grating strain sensors, produced by DCYS, have the advantages of simple installation and flexible placement. They can be installed in two main ways:
1. Customized fixtures for drilling and fixing or welding for installation and placement.
2. Customized base materials for adhesive placement.
Ⅺ. Surface Fiber Bragg Grating Strain Sensor - Curved Surface Fiber Bragg Grating Strain Sensor
DCYS can customize special bases and fixtures for fiber Bragg grating strain sensors according to customers' usage requirements and the actual working environment of the sensors, enabling the installation and fixation of fiber Bragg grating strain sensors on the surface of the measured object.
At this point, the OFSCN® fiber Bragg grating strain sensor becomes a surface FBG strain sensor or surface-mounted FBG strain sensor. It can also be adhered and placed on various curved surfaces, turning it into a curved surface FBG strain sensor. If arranged on the surface of a pipeline, it can be referred to as a FBG pipeline strain sensor.
Ⅻ. Key Points for Purchasing Fiber Bragg Grating Strain Sensor
DCYS produces a rich variety and numerous models of the OFSCN® series fiber Bragg grating strain sensors. When making a purchase, you should consider your specific needs:
1. Clearly determine the measuring range of the strain you need to test. Confirming the maximum measuring range required will help you decide the structure of the FBG strain sensor you will use.
2. Clearly determine the number of strain measurement points required. Decide whether you need a single-point or multi-point strain measurement, and if it's multi-point, you need to confirm the number of FBG required for one sensor.
3. Consider the length of the object to be measured. The length of OFSCN® large-range fiber Bragg grating strain sensors can be customized, ranging from a few centimeters to tens of meters.
4. Decide the placement method of the sensor. Confirming the placement method of the fiber Bragg grating strain sensor will determine if you need corresponding customized sensor fixtures. DCYS has rich experience in customizing fiber Bragg grating strain sensors for various applications.
XIII. Pricing of Fiber Bragg Grating Strain Sensor
After providing DCYS with the required information such as the measuring range, number of measurement points, length, and placement method of the fiber Bragg grating strain sensor, DCYS will calculate the price for you.