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Classification and selection of manufacturers for fiber optic temperature measurement systems

Fiber optic temperature measurement is a technology that mainly uses certain characteristics of optical fibers to measure temperature, which can be called fiber optic temperature sensors, fiber optic temperature transmitters, fiber optic temperature measurement systems, etc. There are many manufacturers of fiber optic temperature measurement systems, and each manufacturer has different technologies. Currently, there are three types of fiber optic temperature measurement products on the market, namely fluorescent fiber optic temperature sensors, distributed fiber optic temperature measurement systems, fiber Bragg grating sensors, etc., which can be applied in different industries such as transformer temperature measurement, switchgear temperature measurement, and power cable temperature measurement.

Fluorescent fiber optic temperature measurement system:

The temperature module consists of a fluorescent fiber optic demodulator and a fiber optic temperature measurement probe. The fiber optic probe is composed of a fiber optic and a fluorescent object installed on top of it. Fluorescent substances emit fluorescence energy when stimulated by light of a certain wavelength (stimulated spectrum). After the incentive is revoked, the persistence of fluorescence afterglow depends on factors such as the characteristics of the fluorescent substance and environmental temperature. This excited fluorescence typically decays exponentially, and we refer to the decay time constant as fluorescence lifetime or fluorescence afterglow time. Fuzhou Huaguang Tianrui found through experiments that the attenuation of fluorescence afterglow varies under different environmental temperatures. Therefore, by measuring the length of the fluorescence afterglow lifetime and processing it through the fiber optic demodulation section, the ambient temperature at that time can be determined.

Distributed fiber optic temperature measurement system:

DTS Distributed Fiber Temperature Measurement System Product Introduction: A fiber distributed temperature measurement system host from Fuzhou Huaguang Tianrui Optoelectronic Technology Co., Ltd., suitable for long-distance distributed temperature measurement with fast scanning speed. The distributed fiber optic temperature measurement system can provide software protocols to facilitate customer secondary development and more flexibly respond to various testing and monitoring needs.

Features of distributed fiber optic temperature measurement products: remote measurement, continuous distributed measurement, high sensitivity, high accuracy, easy installation, flexible layout, electromagnetic insulation, no interference, lightning protection;

Distributed fiber optic application fields: tunnel temperature monitoring, oil well temperature monitoring, high-voltage cable temperature monitoring, building fire safety monitoring, petroleum (gas) pipeline monitoring;

Fiber Bragg grating temperature measurement system:

Application fields of fiber Bragg grating temperature measurement products:

Power safety monitoring: online temperature measurement of power switchgear, online temperature measurement of power cables, and real-time monitoring of easily overheated power equipment;

Petrochemical safety monitoring: oil tank linear fiber optic temperature sensing fire alarm, petrochemical spherical tank temperature stress monitoring, petroleum pipeline stress corrosion monitoring;

Civil structure monitoring: bridge health monitoring, dam safety monitoring, tunnel safety monitoring, and mine stress monitoring;

Security intelligent monitoring: fiber optic perimeter fence monitoring, intelligent video monitoring, manhole cover safety monitoring;

How to choose a fiber optic temperature measurement system

The price of fiber optic temperature measurement systems is influenced by many factors, but the main factors that affect their price are quality, brand, and so on

1. Application scope

The application of fiber optic temperature measurement is quite common in the power industry, especially in switchgear, transformers, etc., mainly using fluorescent fiber optic temperature measurement. The temperature measurement systems selected in different temperature measurement fields are also different, and the prices are also different. Fluorescent fiber optic temperature measurement systems have a significant cost-effectiveness advantage in point temperature measurement.

2. Temperature measurement range

The temperature measurement range of fluorescent fiber optic sensors is -40 ° C-200 ° C, which can be used in hazardous areas and harsh temperature measurement environments. And it is inherently safe, insulated, high-voltage resistant, anti-interference, and very suitable for use in the field of rail transit and subway transformers.

3. Number of temperature measurement channels

The number of points for temperature measurement in switchgear is generally 3.6.9 points for temperature monitoring, because the heating points of switchgear are contacts, busbars, incoming and outgoing lines, etc., all of which are multiples of 3. Therefore, there are many temperature measurements in these channels. If there are many temperature measurement points and a long distance, distributed fiber optic temperature measurement or fiber optic grating can be used.

4. Service quality

When many people choose fiber optic temperature measurement products, they rarely consider after-sales service. In fact, this is quite important because fiber optic temperature measurement products are different from other daily necessities. They are not purchased at once, but require long-term service and good feedback speed. FJINNO’s customers are spread all over the world, so the service is reliable.

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