A Distributed fiber optics can be used in temperature measurement, vibration, acoustic monitoring, etc. Distributed fiber optic sensors are an important classification of fiber optic sensing technology, distributed fiber optic sensors compared with traditional sensors, distributed fiber optic sensors have passive, strong resistance to electromagnetic interference, high sensitivity, corrosion resistance, long measurement distance, high positioning accuracy, continuous distributed measurement, long service life and other characteristics.Distributed fiber optic vibration monitoring system applications in the following areas:1, pipeline vibration monitoringMeasuring distance: distributed fiber optic vibration monitoring system measuring distance is long, the detection distance can reach 40km;.Accurate positioning: precisely locate the intrusion point and leakage point, and can be directly displayed on the software interface;.Continuous distributed measurement: multi-point multi-event simultaneous monitoring can be achieved, and do not affect each other; high sensitivity, rapid response: fiber optic vibration monitoring system for the measured area of the rapid response, the false alarm rate is extremely low.2、Perimeter security monitoringUninterrupted monitoring: long-distance passive monitoring, lightning, fire, explosion-proof, anti-detection, anti-interference.Visualized alarm display: when the intrusion is generated, the alarm is issued and the intrusion location is displayed on the electronic map through the monitoring software.Linkage video monitoring: freely configure alarm linkage system such as monitoring linkage, control GSM, on-site recording, light broadcasting, etc., and send alarm protocol data to other equipments and software systems through switching quantity;Partitioned / graded event alarms: provide a variety of flexible alarm methods, alarm parameters can be graded and set by area;Compatible with expandability: signal processor has large and small defense zones, which can aptly meet various needs and realize different functions;3、Cable vibration monitoringRelying on distributed fiber optic vibration sensing technology to achieve cable breakage monitoring, real-time measurement of vibration around the transmission line, locate the location of anomalies, and identify potential threats to the vertical distance of the cable, so as to effectively assess the threat level of breakage. The system can provide reliable transmission line anti-vandalism early warning function, to ensure the safe operation of the power system.

A 1. The DTS distributed fiber optic temperature measurement system can monitor temperature online;2. Accurately locate the heating fault point of the cable;3. Accurate on-site monitoring data, stable performance, and reliable product safety;4. Temperature measurement accuracy reaches ± 1 ℃, electromagnetic immunity, and long-term use of the sensor does not require calibration;5. Meet online monitoring needs and achieve unmanned monitoring throughout the day;6. Customized single channel or multi-channel expansion according to needs, convenient connection with internal power network, supporting various communication protocols and specifications;7. Real time data display, using synchronous scanning and parallel detection technology, temperature data collection and transmission can be completed within seconds;8. Able to measure the rate of temperature rise, with strong technical support for temperature monitoring;9. Remote transmission, easy to network.

A Characteristics of Fluorescent Fiber Temperature Measurement System1. The fiber optic end probe is attached to the surface of the measured object to measure temperature2. Temperature measuring optical fibers are immune to electromagnetic field interference3. High voltage insulation, flame and explosion prevention4. Single point temperature measurement and digital signal output5. Fiber optic probes can reach a minimum of 600um6. The transmitter is compact and easy to install

A Fiber optic temperature measurement function of oil immersed transformer windingReal time monitoring of the "hot spot" temperature of transformer windings, evaluating the operating status of transformers, more economically and effectively controlling the cooling system, optimizing costs, and enhancing system reliability;Real time monitoring of temperature information in the operation status of transformers, timely and effective control of loads, and optimization of transformer load operation configuration;Long term online monitoring of transformer temperature trends, construction of archives, and implementation of pre management and risk prediction;Provide dynamic, real-time, safe, and reliable information, timely start the cooling system, and extend the service life of transformers;During peak load operation, prevent unplanned or sudden catastrophic failures caused by transformer overheating;Effectively evaluate and optimize the design and manufacturing process of transformers.

A The temperature controller for dry-type transformers is a new generation of controllers designed specifically for the safe operation of dry-type transformers. The controller adopts microcontroller technology, using three platinum thermistors embedded in the three-phase winding of the dry-type transformer to detect and display the temperature rise of the transformer winding, and has corresponding alarm and control functions to ensure that the transformer operates in a safe state.

A The application of fluorescent fiber optic temperature sensors in the field of smart grids:1. Temperature monitoring of power transformer windings;2. Fiber optic temperature measurement for high-voltage switchgearIt can measure the temperature at the junction of the plum blossom contact and the static contact in the switchgear, and even bury it in the conductive connection of the insulation cylinder;3. Temperature measurement of high-voltage circuit breaker arc extinguishing chamber4. Temperature monitoring of stator, bearing, and end collector rings of hydroelectric generators;5. Direct monitoring of hot spot temperatures in high-voltage equipment such as motor/transformer windings;7. Real time online monitoring of temperature for other electrical equipment.In many special environments where traditional temperature sensors such as PT100 cannot measure temperature accurately, it may not be possible to measure the temperature of objects accurately. However, fluorescent fiber optic temperature sensors are popular among many switchgear temperature measurement manufacturers due to their good insulation, immunity to electromagnetic interference, compact appearance, minimal transmission loss, corrosion resistance, and convenient installation. The basic principle of a fluorescent fiber optic temperature sensor is to excite the fluorescent medium with blue purple light to generate fluorescence. The lifetime of fluorescence decreases with the increase of temperature. Therefore, temperature measurement can be achieved by detecting the lifetime of fluorescence.Fluorescent fiber optic temperature sensor is mainly composed of a fiber optic temperature sensor based on the principle of fluorescence fiber temperature measurement, which has the advantages of simple structure, small volume, light weight, high measurement accuracy, large measurement range, strong corrosion resistance, and electromagnetic interference resistance.Fiber optic probes have inherent safety, high-voltage insulation, and resistance to electromagnetic interference; The system operates stably and reliably without drift, and does not require calibration and verification throughout its entire lifespan; Adopting modular design, allowing for flexible networking and unlimited expansion at any time without wasting resources; Digital and analog outputs facilitate automated real-time control and data management; The probe and demodulator are compact, flexible, and easy to install and maintain.At present, with the continuous emergence of new devices and the expansion of application fields, the performance requirements of sensors are increasing, and there is still a lot of development space. On the other hand, new materials with superior performance are constantly emerging, and sensitive materials with new characteristics provide us with new choices, making sensor design face new concepts. As a promising technology, fiber optic fluorescence temperature sensing technology is rapidly developing in China, especially in some special industries such as medical, high-voltage electrical equipment monitoring, metallurgical processing, and online temperature monitoring of aerospace equipment. Therefore, establishing a comprehensive and systematic theory of fiber optic fluorescence temperature detection is of great significance for improving the level of scientific instruments in this field in China.