Temperature measuring optical cable-Fornitore globale

Xi'an Jiaotong University Science and Technology Park, Yangzhou Economic and Technological Development Zone, Jiangsu Province

1、 Product Introduction
The sensitive component of the distributed fiber optic linear temperature fire detector is the temperature sensing fiber, which transmits the signal to the fiber optic sensor through the temperature sensing fiberThe temperature host (signal processing unit) can achieve temperature measurement and positioning over a long distance range.

1. The main mechanism, detection, and joint defense control of distributed fiber optic linear temperature fire detectors.

2. Distributed fiber optic temperature sensing fire detector, also known as temperature sensing fiber optic, uses the entire transmission fiber optic cable as a transmitterSensors, each point of the optical fiber serves as a detection component and also a sensor component, which can be obtained through continuous distributed measurementThe temperature distribution information on the entire optical fiber.

3. The signal processor unit of the distributed fiber optic linear temperature sensing fire detector should have no more than 8 connections, and the total length of the sensitive components should not exceed 8Not exceeding 15km.
4. The sensing fiber optic cable is a temperature measuring element that combines transmission and temperature sensing, and adopts a special structural design for fast measurementThermal conductive optical cable, with a specially designed cable structure, can quickly transfer external heat and effectively protectThe optical fibers inside the fiber optic cable are suitable for the needs of various application industries, and this type of cable has excellent optical performanceIt has the advantages of high tensile strength, corrosion resistance, high waterproofing, and no metal medium. It has good pressure resistance and high reliability,Long working life.

2、 Principle of Temperature Measurement

Distributed fiber optic linear fire detector is based on distributed fiber optic sensing technology, utilizing fiber optic scattered lightThe sensitivity of Raman signal intensity to temperature enables the measurement of temperature values and temperature changes.
When a light pulse signal is transmitted in an optical fiber, scattered light is generated at every point in the fiber, including the backlight scattered light signalThe signal will return along the optical fiber, and there are various types of scattered light, among which the intensity of Raman scattering is temperature dependent and can be achieved throughDetect the intensity and rate of change of Raman scattering, obtain the temperature value and rate of change at a certain point, and combine it with optical time domain reflectionObtain the temperature value and temperature change rate of a certain point based on the intensity and rate of change of scattered light. By combining optical time domain reflection technology, it is possible toObtain temperature distribution information on the entire fiber optic cable (in fact, it can only locate temperature distribution in units of standard alarm length)When the temperature change of a certain part reaches the set value or the temperature change rate exceeds the set value, an alarm can be givenSignal.