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Distributed optical fiber temperature measurement system for mining

The system is suitable for underground coal mine with explosive dangerous gas and coal dust, and can be used in cable trench, high voltage cable, transmission belt, coal transport trestle, coal storage yard, dangerous goods warehouse and other occasions that need space continuous temperature measurement. It is an ideal upgrade replacement for traditional temperature measurement methods (temperature sensing cable, temperature measuring cable). This system integrates computer, optical fiber communication, optical fiber sensing, photoelectric control and other technologies in one. It is a system that uses the temperature effect of Raman backscatter signal generated by laser in the process of optical fiber transmission, combined with the principle of optical time domain reflectometry to obtain spatial temperature distribution information and spatial positioning information. As a temperature signal sensing and transmission medium, optical fiber has the advantages of intrinsically safe, corrosion resistant, easy to install wiring, free from electromagnetic interference, and can realize long-distance distribution measurement.

Keywords:

Distributed optical fiber temperature measurement system for mining


DESCRIPTION

Product use

The system is suitable for underground coal mine with explosive dangerous gas and coal dust, and can be used in cable trench, high voltage cable, transmission belt, coal transport trestle, coal storage yard, dangerous goods warehouse and other occasions that need space continuous temperature measurement. It is an ideal upgrade replacement for traditional temperature measurement methods (temperature sensing cable, temperature measuring cable). This system integrates computer, optical fiber communication, optical fiber sensing, photoelectric control and other technologies in one. It is a system that uses the temperature effect of Raman backscatter signal generated by laser in the process of optical fiber transmission, combined with the principle of optical time domain reflectometry to obtain spatial temperature distribution information and spatial positioning information. As a temperature signal sensing and transmission medium, optical fiber has the advantages of intrinsically safe, corrosion resistant, easy to install wiring, free from electromagnetic interference, and can realize long-distance distribution measurement.

Distributed optical fiber temperature measurement system is a high reliability temperature online monitoring system, with a good computer interface display, with a field simulation diagram, the actual location of the monitoring and related parameters display, when the detection of abnormal, quickly and accurately determine the actual location of the fault and send an alarm signal, improve the reliability and safety of equipment operation.

 

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Main feature

Structure and function: modular structure, integrated with the powerful processing function of the computer, with small size, simple structure, convenient to carry and powerful functions;

High safety and reliability: sampling light wave signal, free from strong electromagnetic interference in high pressure environment, stable and reliable data;

Optical fiber sensing: one optical fiber can realize long-distance continuous online monitoring of temperature, with no electricity, intrinsically safe, free from electromagnetic interference, moisture-proof and other characteristics, can fully protect the personal safety of operators;

Performance indicators: The use of advanced semiconductor laser, high sensitivity photodetector, automatically adjust the gain, to overcome the optical device due to long working time, caused by the signal deviation, the system long-term stability and reliability;

The fiber itself is insulated, non-conductive, and has good environmental adaptability: the main component of the fiber is quartz, stable performance, water resistance, acid and alkali corrosion resistance, and the service life is up to 30 years;

Convenient construction: optical fiber can be bent, good toughness, not easy to break, convenient construction, coupled with a special outer sheath can effectively prevent dust accumulation, wet water vapor caused by | creepage phenomenon;

Excellent system performance: temperature measurement accuracy is 1C, spatial resolution is 1 meter; Up to 8 channels can be monitored simultaneously by configuring appropriate optical switches.

Temperature detection function: Using the Raman scattering principle of light in the fiber transmission process, the reflected light intensity is calculated to calculate the fiber temperature, so as to perceive the temperature change caused by the thermal radiation of the measured object, and the working face coal seam is jointly laid with the goaf temperature detection function; Installed along the belt conveyor with roller or belt temperature detection function;

The software has rich functions: multiple temperature alarm can be set, such as 40℃ forecast alarm, 50℃ to take measures, etc., and can be corrected according to the site environment; At the same time of setting the overtemperature alarm, it can also set the abnormal temperature rise rate alarm, or the combination of fixed and mild temperature difference alarm, and the fire alarm information is output by acousto-optic, relay control and fire fighting and take appropriate treatment measures;

Self-check and correction function: the equipment has real-time self-check function, once the accident such as breaking occurs, the system will immediately send a prompt message and instruct the staff to locate and repair, and the disconnected fiber can be connected with the fiber welding machine to continue to use;

Built-in data correction unit: real-time correction of collected temperature data to avoid deviation caused by long-term use of light source aging or other conditions;

Strong compatibility: The system can be interconnected with other control systems such as computers and fire alarm systems through RS232, dry contact, Ethernet, etc.

Report configuration function: daily report, monthly report, annual report everywhere function, simple operation and complete functions;

Alarm recording function: alarm data can be set in the software, in addition to setting several temperature value alarm, but also has the temperature change rate alarm and other functions.

Main technical parameters of mine flameproof and intrinsic safety distributed optical fiber temperature measuring host

 

Product Model ZWX-8Z
Rated voltage (V) 1140、660、380、220、127
Display mode 7 inch LCD display
Temperature range (℃) -30~ 120
Temperature resolution (° C) 0.5
Temperature measurement accuracy <2%
Number of temperature measurement channels 8
Temperature measurement length (km) <10
Measurement time (S/ cycle) <12
Positioning error (m) <1
Optical fiber interface FC/APC
Output interface Relay passive contact 1 way;
Communication interface Ethernet optical port 1 way; Ethernet electrical port 1;
Overall dimensions (mm)(width × height × depth) 600×500×400
Weight (kg) 180

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Longyuan Xinke Electric Co., Ltd


+86-391-6836868

+86-391-2193665

Add:Zone B, Tiantan Venture Park, High tech Zone, Jiyuan City, Henan Province

Tel:+86-391-6835588

Email:lyxkdq@163.com

 

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Who are we?

The company is committed to providing advanced technology, stable quality, safe and reliable mining explosion-proof electrical equipment and automation systems for the mining industry. The company's products cover nearly 100 specifications and models of various high and low voltage switches in coal mines, and are suitable for various application scenarios in Electrical substation, roadways, and mining faces.

Longyuan Xinke Electric Co., Ltd

+86-391-6836868

+86-391-2193665

Add:Zone B, Tiantan Venture Park, High tech Zone, Jiyuan City, Henan Province

Tel:+86-391-6835588

Email:lyxkdq@163.com

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