ファイバーブラッググレーティング湿度センサーの用途と特徴

In the field of measurement, temperature and humidity monitoring must have a significant proportion in various different places. With the progress of science and technology and the demand for industrialization, higher requirements have been put forward for temperature and humidity sensors in terms of environmental adaptability, 測定精度, and measurement range. The current situation is that electrical temperature and humidity sensors are still dominant in the market due to their advantages such as low cost, 応答速度が速い, and easy signal processing. しかし, there are some issues with electrical sensors that cannot be ignored, such as poor interchangeability and insufficient long-term stability, and they are not suitable for applications in fields such as electrical, 電気, 可燃性および爆発性の過酷な環境がある石油化学産業.

科学技術の急速な発展に伴い、, 自然界の物理パラメータを正確に測定する需要がますます高まっています。. このプロセス中に, 光ファイバーセンシング技術も包括的な開発と幅広い応用を実現しています, センシングと測定にファイバーブラッググレーティングを使用する技術を含む. よく知られているように, 光ファイバーグレーティングは温度を正確に測定できます, ストレス, 歪み, 変位, 加速度, 等, 一方、環境湿度の測定は新たに開発された分野であり、多くの緊急の科学的および工学的課題に直面しています。. 従来の湿度センサーは、機能性材料を使用して環境の湿気を吸収し、湿度検出のために抵抗や静電容量などの電気パラメータを変化させます。, 繊維しながら ブラッググレーティングで湿度を測定 by converting changes in water molecule content in the environment into changes in optical parameters of light waves, which has inherent advantages in high-precision measurement.

In the fields of aerospace, electrical and electrical engineering, military and meteorological, pharmaceutical and tobacco, it is necessary to monitor environmental humidity. したがって, improving the performance of humidity monitoring instruments and ensuring that they meet the needs of different detection environments is of great significance. The traditional types of humidity sensors include hair type, wet and dry bulb type, as well as capacitive, resistive and other humidity sensors. These types of humidity sensors are susceptible to interference from harsh environments such as electromagnetic, 石油とガス, have poor stability, and limited application range. Humidity sensors are widely used in many fields, such as industrial control, 医薬品生産, agricultural planting, meteorological detection, and food storage. It is of great significance to achieve rapid and accurate measurement of humidity in these fields. Mature electrical humidity sensor products in the market, such as resistive humidity sensors and capacitive humidity sensors, have advantages such as high measurement accuracy and fast response speed. しかし, their long-term stability and interchangeability are poor, and they may fail and even cause safety accidents in certain special applications (such as strong electromagnetic environments and oil and gas detection environments). したがって, a passive detection humidity sensor is needed in some flammable and explosive situations.

電気センサーはさまざまな試験および測定機器で広く使用されています, しかし、それらには多くの制限があります, 伝送ロスなど, 干渉を受けやすい, 過酷な環境では適用できない. 近年では, オプトエレクトロニクスの発展により, 光信号は、その耐干渉性と低損失性能により、センサー内の電気信号に徐々に置き換えられてきました。.

光ファイバーセンサーは、電磁信号の影響を受けにくい受動センサーです。. それらは本質的に安全です (つまり. 難燃剤, 防爆) 電気などの可燃性および爆発性の環境にも適応できます。, 電気, 化学薬品, および製薬産業. さらに, 光ファイバーセンサーは体積が小さい, 軽量, 長距離のネットワーク監視のために狭いエリアに簡単に設置できます。.

最も一般的に使用されている光ファイバー湿度センサーは、 fiber optic grating humidity sensor. The fiber optic grating type temperature and humidity sensor is a new type of temperature and humidity sensor that has developed with the development of fiber optic communication technology. Compared with traditional electrical temperature and humidity sensors, it has advantages such as anti electromagnetic interference, 良好な電気絶縁性, and large dynamic range. 加えて, the sensing part is lightweight, small in size, diverse in structure and geometric shape, and easy to reuse for networking to achieve real-time, オンライン, and distributed sensing. Due to the insensitivity of fiber optic gratings to humidity, they need to be combined with humidity sensitive materials to form humidity sensitive components.

光ファイバー温度センサー, インテリジェント監視システム, 中国の分散型光ファイバーメーカー