Fiber M fiber optic temperature sensors-INNO

Aplicación del sensor de temperatura de fibra Fiber M para monitoreo de temperatura en ambientes hostiles y de alta temperatura

1、 Modelos comunes de sensores de temperatura de fibra óptica Fiber M

Los sensores de temperatura de fibra Fiber M pueden tener varios modelos para adaptarse a diferentes escenarios de aplicación. En el mercado actual, Algunos modelos de sensores de temperatura de fibra óptica tienen sus propios parámetros de rendimiento únicos y rangos aplicables.. Por ejemplo, modelo AF28- ÓPTICA3000X2 (número de stock: M241812）1， Utiliza fibra óptica multimodo para proporcionar aislamiento de alto voltaje., y su carcasa está hecha de material de acero inoxidable., que puede cumplir con los requisitos de instalación de entornos industriales. La interfaz de este modelo de sensor es la interfaz de fibra óptica ST., que es fácil de instalar y tiene un alto rendimiento antiinterferencias. En general, it is very suitable for operation in harsh environments. Its temperature measurement range is -55 °C -+125 °C, with a temperature measurement error of less than or equal to 0.5 ℃ in the full range. The temperature measurement resolution is ± 0.1 °C, the temperature measurement cycle is 45 sobras, the probe temperature range is -100 °C -+260 °C, the fiber length is less than or equal to 50m (fibra multimodo), the interface method is ST interface, the battery life is 4.5 años, the operating temperature is -40 °C -+80 °C, and the probe size is 8 (diámetro) milímetros × 200 (longitud) milímetro. Además, there is the AF28-optic3000 (library number: M178113) modelo sensor de temperatura de fibra óptica 2, which has a temperature accuracy of ± 0.5 °C, a SC fiber optic interface, a temperature measurement range of -40 °C -+125 ℃ or -40-+200 °C (user selectable), a temperature resolution of 12 bits (0.0625 °C), and a temperature measurement speed of 10 seconds or 45 sobras (user selectable). These different models can monitor temperature for different operating conditions under their respective parameters.

2、 Characteristics and requirements of temperature monitoring in high temperature and harsh environments

（1） Characteristics of temperature monitoring in high temperature and harsh environments
Environmental complexity
In high-temperature and harsh environments, there are often multiple complex factors involved. Por ejemplo, around some industrial furnaces, in addition to high temperatures, there may also be pollutants such as dust and corrosive gases. Near the furnace of a steel smelting plant, a large amount of dust particles are emitted into the surrounding environment along with the hot air, which may adsorb onto the temperature sensor and interfere with its normal operation. Mientras tanto, with the chemical reactions during the metallurgical process, corrosive gases such as sulfur dioxide are produced, posing a risk of corrosion to temperature sensors.
Leakage and volatilization of chemical raw materials are common in high-temperature chemical production environments. Por ejemplo, after the leakage of acidic or alkaline chemical raw materials, the acidity and alkalinity of the surrounding environment will change, which has varying degrees of impact on the shell material and internal components of temperature sensors, and may lead to problems such as corrosion of the sensor shell and internal circuit short circuits.
Large temperature variation amplitude
The temperature fluctuation range in high-temperature environments can be very large. Taking the engine testing environment in the aerospace field as an example, the temperature rapidly rises from room temperature to thousands of degrees Celsius during engine start-up and operation. At the combustion chamber of the engine, the temperature can reach around 2000-3000 °C, while outside the engine body, the temperature may be close to room temperature. Such a huge temperature difference places high demands on the adaptability of temperature monitoring equipment.
In some high-temperature kilns, the temperature inside the kiln needs to be precisely controlled between several hundred degrees and over a thousand degrees during ceramic firing. From the preheating stage of the kiln to different stages of firing, the temperature rise and stability need to be strictly monitored, with temperature changes ranging from tens of degrees Celsius to thousands of degrees Celsius, y es necesario mantener mediciones de alta precisión bajo cambios tan grandes.
Hay factores que interfieren presentes.
Los entornos con altas temperaturas suelen ir acompañados de fuertes interferencias de campos electromagnéticos.. En el taller de soldadura para la producción de equipos eléctricos., El equipo de soldadura genera fuertes campos electromagnéticos durante el funcionamiento.. Por ejemplo, durante la soldadura por arco, la intensidad actual es alta, y el campo electromagnético generado puede interferir con las líneas de comunicación de sensores de temperatura electrónicos comunes, afectando la precisión de su transmisión de datos. Para sensores de temperatura de fibra óptica, aunque tienen cierta resistencia a las interferencias electromagnéticas, También necesitan hacer frente a posibles interferencias de otras fuentes electromagnéticas en este entorno de fuerte campo electromagnético..
In some special high-temperature environments such as near nuclear reactors, in addition to high temperatures and nuclear radiation, there will also be strong magnetic fields. This strong magnetic field may alter the working state of magnetic field sensitive components in some sensors. If the design of temperature sensors does not fully consider this factor, measurement errors can easily occur.

（2） Requirements for temperature monitoring in high temperature and harsh environments
Resistencia a altas temperaturas
Sensors must be able to withstand extreme temperatures in high-temperature environments. If the sensor itself is not resistant to high temperatures, it is easily damaged in high-temperature environments. Por ejemplo, in a glass melting plant, the temperature inside the furnace can reach up to around 1600 °C, and sensors need to be directly or indirectly exposed to such high temperature environments. Their materials must be able to maintain stable physical and chemical properties at this temperature. This requires the structural materials of the sensor, such as the housing and internal sensing elements, to be made of high-temperature special materials. Por ejemplo, using high-temperature resistant materials such as ceramics and high-temperature alloys as external protective covers for sensors or as carriers for internal key sensing components.
Alta confiabilidad
Due to the difficulty of equipment maintenance in high temperature and harsh environments, temperature sensors need to have high reliability. This means that the probability of sensor failure during long-term operation is very low, and it can continuously and stably measure temperature. Por ejemplo, en investigación científica cerca de respiraderos hidrotermales de aguas profundas, Es posible que los sensores necesiten funcionar continuamente durante meses o incluso años en condiciones de alta temperatura., alta presión, y ambientes submarinos altamente corrosivos. La temperatura del fluido hidrotermal submarino puede superar 300 °C. Si los sensores funcionan mal con frecuencia, no sólo conducirá a la pérdida de datos de investigación, pero también puede causar enormes pérdidas económicas y riesgos de seguridad en algunas instalaciones especiales de investigación científica.. Por lo tanto, el proceso de diseño y fabricación de sensores debe ser extremadamente preciso., Y el circuito interno o la estructura de la ruta óptica deben someterse a estrictas pruebas de estabilidad..
alta precisión
In high-temperature and harsh environments, Muchos procesos de producción industrial requieren una precisión extremadamente alta en el control de la temperatura.. Tomando como ejemplo el proceso de fotolitografía en la fabricación de chips semiconductores., even small temperature changes can affect the chemical reaction rate of photoresist and the accuracy of chip patterns. This process requires temperature error control within ± 1 ℃ in an environment of several hundred degrees Celsius. So temperature sensors need to be able to provide high-precision measurements to ensure product quality in production or experimentation. This requires the measurement principle and calibration algorithm of the sensor to be very accurate. Por ejemplo, fiber optic temperature sensors use optical principles to improve temperature measurement accuracy through precise wavelength detection or light intensity measurement.
Buena capacidad antiinterferente
Como se mencionó anteriormente, there are various interference factors in high-temperature and harsh environments. Sensors need to have good anti-interference ability to address these issues. Por ejemplo, in the high-temperature processing environment of RF heating equipment, RF signals can interfere with surrounding electronic devices. Sensors should be able to accurately obtain temperature information under strong radio frequency interference. Para sensores de temperatura de fibra óptica, they have a natural advantage in resisting electromagnetic interference, but their design should also avoid the influence of other interference sources, such as using a special fiber optic protective layer to resist light leakage and the mixing of external interference light, while optimizing the internal signal processing circuit to improve the filtering ability of interference signals.

3、 Application case of Fiber M fiber optic temperature sensor in high temperature and harsh environment

Industria petroquímica
In the refining units of petrochemicals, Hay numerosos recipientes de reacción y tuberías de alta temperatura.. Por ejemplo, en el proceso de destilación del petróleo crudo, la temperatura interna de la torre de destilación puede alcanzar 300-400 °C. Los sensores de temperatura de fibra óptica Fiber M se pueden instalar dentro del reactor o fuera de la tubería para monitorear la temperatura en tiempo real.. Debido a su resistencia a la corrosión, Resistencia a altas temperaturas, y resistencia a interferencias electromagnéticas, Puede funcionar de forma estable durante mucho tiempo en entornos llenos de petróleo y gas., Altas temperaturas, y riesgos de corrosión. Al monitorear con precisión la temperatura, El proceso de destilación del petróleo crudo se puede controlar mejor., mejorar la calidad y el rendimiento de los productos petrolíferos. Si se utilizan sensores de temperatura electrónicos tradicionales, El entorno de petróleo y gas puede suponer un riesgo de explosión., y los componentes electrónicos se corroen y dañan fácilmente. En contraste, fiber optic temperature sensors have higher safety and reliability.
Campo aeroespacial
In the testing and operation monitoring of aircraft engines, the temperature around the turbine blades inside the engine is extremely high. Por ejemplo, at the outlet of the combustion chamber of a high-performance jet engine, the gas temperature can exceed 2000 °C. Fiber M fiber optic temperature sensors can measure temperature near the blades at such high temperatures, providing accurate temperature data for engine performance evaluation and optimization. Due to the complexity of the operating environment of aerospace equipment, including high-speed airflow, strong electromagnetic radiation, etc., the small size, high anti-interference ability, and high temperature resistance of fiber optic sensors make them ideal temperature monitoring devices. In the manufacturing process of composite material structures for aircraft, the drying and curing processes need to be carried out in a high-temperature environment. Fiber optic temperature sensors can accurately monitor the temperature to ensure the quality of composite materials.
metallurgical industry
During the smelting process in a steel furnace, the temperature at which the metal inside the furnace melts can reach 1500-1600 °C. Fiber M fiber optic temperature sensors can adapt to such high temperature environments and monitor the temperature inside the furnace in real-time. Due to the presence of a large amount of dust, vibración, and electromagnetic interference in the smelting workshop, the non-contact measurement method, capacidad antiinterferencia, and high temperature resistance of fiber optic sensors enable them to work stably. Accurate temperature monitoring helps to control chemical reactions in the steelmaking process and improve the quality of steel. During the metal rolling process, the surface temperature of the high-temperature rolling mill also needs to be precisely controlled. Fiber optic temperature sensors can be installed near the rolling mill to provide temperature data for optimizing the rolling process.