Tel:189-1186-2450
Mobile:189-1186-2450
Email:njzzcg888@163.com
Address:7th Floor, R&D Building, Building 51, Emerging Industries, Nanjing University Science Park, No. 8 Yuanhua Road, Xianlin Street, Qixia District, Nanjing City; Beijing Office: No.1 Zhongliang Road, Daxing District, Beijing, Zhuzong Vanke Plaza
Rapidity, distribution, progressiveness, accuracy, compatibility, security
Distributed Fiber Optic Temperature Measurement System (DTS)
Model：ZZ-DTS
1、System Overview
Distributed fiber optic temperature measurement system DTS (Linear Distributed Fiber Temperature Sensing Fire Detector) is a continuous distributed fiber temperature sensing system (DTS) that utilizes advanced OTDR technology and Raman scattering light's temperature sensitive characteristics to detect temperature changes along different positions of the fiber, achieving truly distributed measurement. The linear fiber optic differential temperature fire detector can not only timely warn of fire hazards, but also accurately locate the location of the fire. As a mature distributed temperature measurement method, linear fiber optic differential temperature fire detectors have advantages such as long measurement distance, high measurement accuracy, fast response speed, resistance to electromagnetic interference, and suitability for hazardous areas such as flammable and explosive materials. They can be widely used in online monitoring of high-voltage cables, analysis of power carrying capacity, fire monitoring of traffic tunnels, fire monitoring of oil and gas storage tanks, fire monitoring of coal conveyor belts, and leakage monitoring of dams。
2、Product IntroductionThe temperature measurement of DTS is based on the spontaneous Raman scattering effect. After high-power narrow pulse laser pulse LD is incident on the sensing fiber, the laser interacts with the fiber molecules, producing extremely weak backscattered light. The scattered light has three wavelengths, namely Rayleigh, anti Stokes, and Stokes light; Among them, anti stocks are temperature sensitive and signal light; Stokes temperature insensitive, used as reference light. The backscattered signal light from the sensing fiber passes through the splitter module WF again to isolate the Rayleigh scattered light. It passes through the temperature sensitive anti Stokes signal light and the temperature insensitive Stokes reference light, and is received by the same detector (APD). The temperature can be calculated based on the ratio of the two light intensities. The determination of the position is based on the optical time-domain reflection OTDR technology, which uses high-speed data acquisition to measure the echo time of the scattered signal and determine the fiber position corresponding to the scattered signal.
3、Host technical specifications
Host technical performance（ZZ-DTS） | |
Fiber type | Multimode fiber 62.5/125&50/125, single-mode fiber 9/125 can be customized |
Product Architecture | The device adopts an embedded FPGA+ARM design, independent of the operating system, and can adapt to any operating system. All internal circuits of the machines are treated with three protections, including moisture-proof, leakage proof, dust-proof, corrosion-proof, anti-aging, and corona resistant *The host can be integrated with a Windows industrial computer for local display (optional) |
Measure distance | 10km (standard configuration), optional specifications of 15km and 20km |
Data sampling rate | 200Mbps, optional 250Mbps |
spatial resolution | 0.5-3m (sampling rate of 0.4 meters or 0.5 meters) |
positioning accuracy | ±0.5m-±1m |
Positioning resolution | ± 0.5m or ± 0.4m |
Measurement time | ≤ 0.5s/km, typical value of 3S/channel (within 10km) |
Temperature measurement range | -40℃-700℃（Depending on the fiber optic cable） |
Temperature measurement accuracy | ±0.5℃@3km,±1℃@6km, ±1.5℃@10km |
Temperature resolution | 0.01℃ |
Measurement channel | ≤16 |
Fiber optic connectors | FC/APC |
Working power supply | 9-36V DC wide voltage, average power consumption ≤ 8W, standard power supply: 24VDC |
Operating temperature | -10℃-60℃ |
Storage temperature | -20℃-70℃ |
External display | (Optional) 4.3-inch LCD screen, displaying temperature curve, temperature measurement cable construction quality, network configuration, equipment self inspection, equipment information display, alarm recording, alarm threshold setting, equipment noise reduction and other functional units to the outside world |
communication interface | 1 channel RJ45 Ethernet, supporting TCP protocol； 1 RS232 (auxiliary data communication, external serial port to network port module and main communication port form independent dual network ports, supporting TCP protocol and ModbusRTU protocol)； 2-way RS485 (supports ModbusRTU protocol module, 64 way relay extension, docking with fire alarm and other protocol modules)； 8-way relay (equipped with the equipment, capable of connecting fault alarm and temperature fire alarm)； |
Dimensions (length, width, height) | 482.6mm×458.4mm×89mm |
weight | 8KG |
4、Temperature sensing optical cable
project | Main technical indicators of temperature sensing optical cables |
cable structure | Single core multimode optical fiber wrapped in armored spiral tube |
Fiber type | 62.5/125/250μm |
Joint type | FC/APC |
Bending radius | Over 60mm |
pull | During installation: maximum 200N During use: maximum 125N |
temperature range | -40~120℃ |
working life | 30year |
189-1186-2450
7th Floor, R&D Building, Building 51, Emerging Industries, Nanjing University Science Park, No. 8 Yuanhua Road, Xianlin Street, Qixia District, Nanjing City; Beijing Office: No.1 Zhongliang Road, Daxing District, Beijing, Zhuzong Vanke Plaza
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