The characteristics and applications of distributed fiber optic temperature measurement systems-INNO

The characteristics of DTS hệ thống đo nhiệt độ sợi quang phân tán

The smart grid of the power system includes power plants, high-voltage grids, trạm biến áp, trạm phân phối, vân vân., specifically including generators, máy biến áp, dây cáp điện, switches and other power equipment. Power equipment usually operates in environments such as high voltage, strong electric fields, and heat loads, and the working environment is unmanned and unmonitored. As an engineering infrastructure, the smart grid involves the electricity needs of thousands of households, and the operating temperature of power equipment is an important factor in ensuring the safe operation of the smart grid. Whether it is transformers, dây cáp điện, or other power equipment, as important components of the power system, they may cause local overheating or arc sparks due to some circuit problems or external factors, leading to fires and causing losses to people’s production and life. Vì thế, in order to avoid such a malignant event, it is urgent to conduct comprehensive temperature monitoring of power equipment. For cable tunnels used to accommodate a large number of cables laid on cable supports in corridors or tunnel structures, the environmental temperature and cable operating conditions can only
When a malfunction occurs, it is found that the longer the operating time, the more prone it is to overheating and burning accidents, which may cause huge economic losses.

Application of distributed fiber optic temperature measurement system in fiber optic temperature sensors

The existing electronic temperature sensors use point type temperature measurement, which is prone to electromagnetic interference and is not suitable for strong electromagnetic scenarios, while fiber optic temperature sensors are not affected by electromagnetic interference and are very suitable for temperature monitoring in power systems. Fiber optic temperature sensors include single point temperature sensors and quasi distributed fiber optic temperature sensors. A single point temperature sensor measures a certain point in the temperature field with high measurement accuracy and reliability, but it is difficult to measure the distribution of multiple points in the temperature field. To solve the measurement problem of temperature field multi-point distribution, a quasi distributed cảm biến nhiệt độ sợi quang composed of a multiplexed fiber optic temperature sensor and an array of fiber optic temperature sensors has emerged. The quasi distributed fiber optic temperature sensor uses a single point fiber optic sensor array to form a spatial network distribution, achieving distributed fiber optic temperature measurement.

Distributed fiber optic thermometer is an optical time-domain temperature monitoring system, which is a widely used distributed fiber optic temperature measurement system both domestically and internationally. The system consists of a temperature measurement host, temperature sensing fiber optic, and DTS backend analysis software.

The distributed temperature measurement fiber optic system is based on the principle of Raman scattering in light, integrating optical time-domain reflection (OTDR) technology and the temperature sensitive characteristics of scattered light. It detects temperature changes at different positions along the fiber optic and achieves truly distributed measurement through intelligent analysis of DTS backend software data. It can continuously measure the temperature at any point along the fiber optic.

Các đặc điểm của hệ thống đo nhiệt độ sợi quang phân tán

The measurement distance of the distributed fiber optic temperature measurement system ranges from a few kilometers to several tens of kilometers, and the spatial positioning accuracy can reach the level of 1m. It can conduct uninterrupted real-time online monitoring and transmit real-time data remotely, timely warning of fire hazards, and accurately locate the location of the fire. It can achieve distributed real-time measurement of temperature in a wide range of space, với những ưu điểm như khoảng cách đo dài, no measurement blind spots, giám sát thời gian thực, and precise positioning. It is widely used in fields such as transportation tunnels, tàu điện ngầm, quyền lực, hóa dầu, và bảo tồn nước.

Hệ thống đo nhiệt độ sợi quang phân tán

The distributed fiber optic temperature measurement system adopts an embedded system solution to complete the design of the temperature measurement host

The temperature measurement host adopts a fanless cooling design, which has a low failure rate and low noise during operation

Đo lường thời gian thực phân tán, che phủ 100% of the detection area, without measurement blind spots, accurately locating the location of fires

Full process visualization display, real-time display of fire development trends and spreading directions

365 x 24 hours uninterrupted online monitoring throughout the year, fundamentally eliminating accidents caused by personnel negligence

Khoảng cách đo dài và thông tin đo phong phú. Độ chính xác đo cao và tốc độ phản hồi nhanh. Độ tin cậy cao và tỷ lệ báo động sai thấp

The alarm method is flexible and can achieve differential temperature and multi-level alarm, đảm bảo báo động đáng tin cậy trong giai đoạn đầu của đám cháy

Multiple different alarm control areas can be set up for environmental changes, and the alarm control area is programmable

Design according to user requirements, each individual alarm area can be set with different alarm values

Temperature sensing fiber optic is both a signal transmission carrier and a temperature sensing element, making installation convenient

The temperature sensing optical fiber adopts a durability design, with a long working life and low maintenance costs in the later stage. Optical signal measurement, an toàn nội tại

Chống nhiễu điện từ, suitable for long-term operation under harsh conditions such as flammability and explosion

The fiber optic temperature measurement system adopts an embedded system design with composite industrial grade reliability requirements, and has network access and remote transmission functions

With network interface, it can be connected to the management network to achieve information sharing and further data processing functions

Distributed fiber optic temperature measurement industry applications:

Petroleum industry: monitoring of oil and gas pipelines, gas storage tanks, bể chứa dầu, and permanent underground monitoring

Công nghiệp hóa dầu: monitoring of liquid storage tanks and transmission pipelines

Power industry: monitoring of cables and transmission lines, rãnh cáp, hầm cáp, and cable trays

Grain industry: granary monitoring

Security Industry: Fire Detection for Tunnels and Special Fire Hazard Buildings

Transportation industry: cable and transmission line monitoring

Other industries: Distributed fiber optic temperature measurement systems can also be used in military depots, kho chứa hàng nguy hiểm, đập nước, transmission belts, coal handling bridges, coal storage yards, and other situations that require continuous temperature measurement in space. They are an ideal upgrade substitute for traditional temperature measurement methods (cáp cảm biến nhiệt độ, temperature measurement cables).

The manufacturer of distributed temperature sensing fiber optic cable and temperature measurement host can contact FJINNO for quotation

Temperature measurement fiber optic cable model, temperature measurement fiber optic cable manufacturer specifications, production customization, supply as needed

Application comprehensive pipe gallery/tunnel/highway/oil tank/warehouse/mine/cable/oil and gas pipeline

Advantages include practical application cases/direct sales from manufacturers/complete qualifications