כיצד להשתמש בחיישני סיבים אופטיים לניטור רטט

Fiber optic is not only mainly used for communication signal transmission, but also for sensing and detecting various physical characteristics, including acceleration, לַחַץ, טֶמפֶּרָטוּרָה, וכו. Due to the fact that optical fibers themselves do not require power supply and are not affected by electromagnetic interference, vibration optical fibers are becoming increasingly widely used in large-scale perimeter applications. A single system can achieve detection ranging from tens of meters to tens of kilometers, which has obvious advantages over traditional live detection systems (vibration cables, leakage cables, וכו').

The working principle of fiber optic vibration measurement is to generate interference of light through external strain (vibration or compression), and detect the interference signal to achieve strain detection. ישנן שתי דרכים עיקריות להשיג הפרעות אופטיות: שימוש בשני סיבים אופטיים עצמאיים להעברת אור מונוכרומטי הומולוגי ובסופו של דבר צימוד להשגת הפרעות אופטיות, הידוע בכינויו Mach Zehnder Interference; סוג נוסף הוא הפרעות בין מצבים בתוך סיבים מולטימודים.

חיישני רטט סיבים אופטיים היו בשימוש נרחב בהגנה והתרעה מוקדמת על מדרונות גבוהים ותלולים בשל היתרונות שלהם כגון אי הפרעה אלקטרומגנטית, אין צורך באספקת חשמל באתר, אמינות ויציבות טובה לטווח ארוך, and long transmission distance. ניטור אזעקת סלעים ומפולות מסוכנים שייך לענף של ניטור מיגון מדרונות גבוהים ותלולים. אם ניתן לזהות מראש סלע ומפולת סלעים מסוכנים, it will greatly reduce the economic losses caused by dangerous rock and rockfall to railways, highways, וכו. Fiber optic vibration sensing technology is a type of technology that changes the characteristics of the transmitted light in the fiber optic sensor when it is affected by external interference. Through special sensing equipment, the signal is collected and analyzed to detect changes in the characteristics of the light, thereby detecting the vibration of objects.

המאפיינים של fiber optic vibration sensors

The characteristics of fiber optic sensors are long transmission distance and immunity to electromagnetic interference. They have been widely used, and their modulation forms mainly include intensity modulation, סורג סיבים אופטיים, and interference. כַּיוֹם, there are many patented technologies in the field of fiber optic vibration sensors. These fiber optic sensors have their own advantages, some have high sensitivity, some have good frequency response, and some have high technical content, which can adapt well to common vibration signal conversion. With the continuous development of sensing technology, גם הדרישות הטכניות של אנשים לחיישנים עולות. There is an increasing need for fiber optic vibration sensors that meet the conditions of high sensitivity, עלות נמוכה, simple preparation process, and good stability. In the process of sensing and detection, sensitivity and stability are the main technical influencing factors, while preparation process and cost are important influencing factors in industrial production. Vibration sensors that combine these advantages are receiving increasing attention and favor.

The vibration fiber optic sensor has a simple structure, רגישות גבוהה, large output amplitude, יכולת חזקה נגד הפרעות, long transmission distance, good low-frequency response, low lower limit frequency, large dynamic range of the diaphragm, and good damping effect. It can adapt well to certain special occasions such as high-altitude chimney shaking, low-frequency vibration of bridges, monitoring of landslide precursors, and long-term low-frequency vibration signal monitoring under complex environmental conditions such as earthquake precursor infrasound waves.

יתרונות של Fiber Optic Vibration Sensor Detection System

1. Poor environment not affected

Long term installation in harsh outdoor environments with no one on duty, stable sensor structure, and high fatigue life;

2. יכולת אנטי-הפרעות חזקה

In addition to signals caused by falling rocks, vibration signals also have a large number of complex interference signals with strong identification;

3. סיבים אופטיים sensors have fast response speed

The monitoring range along the railway is wide, and in order to save costs and increase the monitoring range of sensors, high sensor sensitivity is required.

4. Not affected by other vibrations

At the same time as high sensitivity, it has sufficient strength to resist the damage caused by large vibrations caused by trains.

חיישן טמפרטורה בסיבים אופטיים, מערכת ניטור חכמה, יצרן סיבים אופטיים מבוזרים בסין