How to use a fluorescent fiber optic temperature measurement device to monitor temperature

Fiberoptisk temperatursensor, Intelligent overvågningssystem, Distribueret fiberoptisk producent i Kina

Working principle of fluorescerende fiberoptisk temperaturmålingsenhed

The working principle of the fluorescent fiber optic temperature measurement device is based on the temperature sensitivity of fluorescent materials. Some rare earth materials and other fluorescent substances produce fluorescence when stimulated by specific wavelengths of light (such as visible light or ultraviolet light), which is a type of light that radiates excess energy during the process of excitation from the ground state to the excited state and back to the ground state. When the temperature changes, the fluorescence characteristics of the fluorescent material will also change accordingly. Specifically, as the temperature increases, the emission intensity of the fluorescent material decreases and the peak position may shift; When the temperature decreases, the emission intensity of the fluorescent material will increase, and the peak position may also change. Fluorescence temperature measurement fiber utilizes this characteristic to infer environmental temperature changes through appropriate fiber transmission, excitation light source, and data processing system. For eksempel, in a fluorescent fiber sensor, temperature information can be obtained by measuring the changes in fluorescence intensity and peak value of the fluorescent fiber. Fiber optic itself has advantages such as electromagnetic insulation and wide bandwidth. As a medium for sensing or transmission in this process, it can break through the limitations of electronic temperature sensors. The amplitude signal loss of its transmission is low, and it can be transmitted over long distances, allowing the photoelectric devices of the sensor to be detached from the temperature measurement site and avoid harsh environments. In radiation temperature measurement, fiber optic replaces the spatial transmission optical path of conventional thermometers, reducing the influence of interference factors such as dust, mist, and water vapor on the measurement results

Temperature Monitoring Method of Fluorescent Fiber Optic Temperature Measuring Device

Steps and precautions for using fluorescent fiber optic temperature measurement device

Preparation work before installation

Construction personnel must read the “Precautions for Fiber Optic Installation/Maintenance” thoroughly and clarify the installation plan and scheme for built-in fiber optic cables and sensors. Before installation, it is necessary to check whether the fiber optic cable is damaged, and if it is damaged, it should be replaced in a timely manner. After installation, the light should be tested promptly.

Key points to note during installation

The installation and maintenance of optical fibers should be carried out by technically trained personnel. During the installation process, it is important to avoid heavy pressure, tight clamping, or being pricked by sharp objects on the optical fiber. When laying optical fibers, the pulling force should not be too strong, and it is strictly prohibited to pull or tug on the fibers. At least two people need to cooperate, with one person pulling in front and the person behind slowly laying. During the process of fiber optic deployment, twisting, knotting, and back fastening should be avoided. The fiber optic ST connector must always be held in hand and must not be shaken. When the optical fiber needs to turn, its turning diameter should be greater than 100mm; If a sharp angle is to be passed at a turning point, a soft bending protective layer or other guiding device must be placed

Examples of temperature monitoring using fluorescent fiber optic temperature measuring devices in different scenarios

Application in the power system

In the power grid, fluorescent fiber optic temperature measurement devices can be used for real-time monitoring of the operating temperature of equipment such as switchgear, knife switch switches, kabelsamlinger, transformers, and other high-voltage power equipment. These devices belong to high current and high voltage electrical equipment, and their electrical environmental conditions are complex. Fluorescent fiber optic temperature measurement technology has the characteristics of high voltage resistance, high insulation, and electromagnetic interference resistance, which can solve the problem of measuring hot spot temperature in power equipment. It can be directly embedded in electrical equipment to measure the hot spot temperature inside the equipment, which cannot be achieved by infrared temperature measurement technology. Infrared temperature measurement technology can only measure the temperature on the surface of electrical equipment. Real time monitoring of equipment temperature can improve production efficiency and ensure production safety, as well as provide early prediction of faults and fires caused by insulation aging or poor contact

Application in the medical field

In the medical field, fluorescence fiber optic temperature measurement technology can utilize the small and bendable characteristics of optical fibers to create small sensors for temperature measurement in confined spaces, such as measuring the temperature around internal organs or tissues of the human body. It has the advantages of strong anti-interference, høj følsomhed, and good repeatability, which can accurately obtain temperature data and provide important basis for medical diagnosis and treatment.

Application in complex environments

In some special working conditions and environments, such as explosive, brandfarlig, high voltage, strong electromagnetic field, corrosive gases and liquids, as well as environments that require rapid response and non-contact, fiber optic temperature measurement technology has unique advantages. For eksempel, in industrial environments with strong electromagnetic field interference, or in production sites with corrosive chemicals, fluorescent fiber optic temperature measurement devices can work normally and accurately measure temperature. This is because the electromagnetic insulation of optical fibers and their working principle utilize the modulation effect of temperature on optical signals, which makes quartz optical fibers more commonly used for sensing or transmission. The amplitude signal loss of transmission is low, and it can be transmitted over long distances, avoiding the influence of harsh environments on measurement