What Are the Best Tips for Fiber-Optic Installation?

Fluorescent optical fiber temperature measurement system is suitable for temperature monitoring in special industrial environments such as high voltage and strong electromagnetic (EMI / RFI / EMP). The system design is flexible and highly reliable, suitable for various temperature measurement applications and multi-point temperature monitoring applications with complex topological structures.

Fluorescent Fiber Optic Temperature Sensor

Fluorescent optical fiber temperature measurement system is suitable for temperature monitoring in special industrial environments such as high voltage and strong electromagnetic (EMI / RFI / EMP). The system design is flexible and highly reliable, suitable for various temperature measurement applications and multi-point temperature monitoring applications with complex topological structures.

Chinese name

Fluorescent Fiber Optic Temperature Sensor

Features

Flexible form and high reliability

Use

Temperature monitoring

Trial environment

Electromagnetic / RF environment

Fluorescent fiber temperature sensor is made of multimode fiber and on top of it

Pure fiber probe has intrinsic safety, high voltage insulation, and anti-electromagnetic interference;

The system works stably and reliably without drift, and no calibration is required for the whole life;

Modular design allows flexible and flexible networking, unlimited expansion at any time, no waste of resources;

Digital and analog output for easy real-time control and data management;

The probe and demodulator are small and flexible, easy to install and maintain.

Optical fiber sensing system usually consists of three parts: probe, transmission fiber and signal demodulator. When choosing fluorescent fiber temperature sensing products, you need to consider the following issues:

I. Applicable application fields

What kind of needs do you choose for fiber optic sensors? There are several reasons based on the characteristics of fiber optic sensors:

1. In the electromagnetic / RF environment, the traditional temperature measurement method is severely interfered and cannot work normally;

2. There are particularly high requirements for accuracy, sensitivity, or life, stability / reliability;

3. The installation environment is narrow and has special requirements for the size of the sensor;

4. Flammable, explosive and corrosive environment, with special requirements for safety / corrosion resistance.

After determining the applicability, you can start to choose fiber optic sensor products.

1. According to the number of points you need to measure, determine whether to use "distributed" or "single point" sensors. This involves single point cost, total cost, and installation layout issues:

Generally, when there are less than 50 measurement points, a single-point type is used, such as a fluorescent sensor; when there are more than 50 measurement points, a distributed type, such as a fiber grating sensor, is usually used.

2. Measuring temperature range:

Generally, the temperature range of fiber optic sensors is divided into four sections: -40 -+ 80 ; -40 -+ 250 ; -40C- + 400 ; + 20C- + 60 (medicine).

3. Requirements for accuracy and resolution:

Generally, the temperature measurement accuracy of optical fiber sensors is divided into five grades: ± 0.05 ° C; ± 0.1 ° C; ± 0.3 ° C; ± 0.5 ° C; ± 1 ° C.

4. Working types of the probe. Common working types are: immersion type, contact type and medical type.

Immersion sensors can be used to measure the temperature of solids, liquids and gases. Such as the temperature measurement of industrial liquid tanks. The immersion sensor is specially treated, the strength and toughness of the optical fiber are strong, and it can resist chemical corrosion in the liquid tank. Contact sensors measure the surface temperature of objects, such as temperature monitoring of high-voltage equipment such as dry-type transformers, high-voltage switch cabinets, and high-voltage buses. The medical sensor is specially designed for life science measurement. The probe is small and thin. With the special demodulator, it can achieve fast response speed and very high accuracy.

5. Selection of probe size and fiber length:

The user needs to select the probe size (diameter) and fiber length according to the requirements of the measurement object and the environment.

Probe diameters are usually: <0.5mm; 0.5-1mm; 2.3mm; 3.2mm, etc. The standard fiber length is 2M. Users can customize the probe fiber length and fiber extension cable length as required. At the same time, you can also choose the type of optical fiber and optical fiber connector according to the application environment: the outer material of the optical fiber is generally Teflon, polyurethane, PVC, etc .; the types of optical fiber connectors are: ordinary, watertight, airtight, connection Types are: SMA, ST, STMA, HFBR, etc.

6. Requirements for data sampling frequency:

The sampling frequency of the optical fiber sensor temperature measurement system is usually divided into four levels: <= 10Hz; 20Hz; 1kHz; 200kHz.

7. Selection of signal output interface:

Signal output is divided into analog output and digital output. There are two types of analog output: 0-5V / 10V voltage output and 4-20mA current output. Digital outputs are: RS-232; RS-485; USB, etc.

8. Choice of installation form:

Signal demodulators are usually in the form of hand-held portable and fixed, with or without display, and fixed products include industrial standard DIN rail installation, PCB board, ordinary desktop and standard industrial cabinet type.

The portable demodulator can record measurement data everywhere, and record the data on the internal storage medium, and then return the data to the computing device when convenient.

Probe installation methods usually include: tape binding, clip fixing, thread fixing, gluing and other forms.

9, the choice of price

As various types of fiber optic sensors are also high-tech products and the price is generally high, users usually need to choose between product performance / function and price.