موسوعة تقنية استشعار شبكة براغ الليفية - أسئلة متكررة FBG - أسئلة متكررة لمستشعر FBG - أسئلة متكررة لمزيل تشكيل FBG - تحليل مشاكل التطبيق الشائعة لـ FBG

This article analyzes the advantages و benefits brought by good pressure resistance in FBG sensors, including the expansion of application environments و the convenience in engineering construction. It also introduces the 'OFSCN® Capillary Seamless Steel Tube Series Fiber Bragg Grating Sensor'  produced by DCYS (These series of products are all high-pressure-resistant fiber optic gratingFBG sensors used for temperature, strain, or stress measurements). It shows part of the physical illustrations و parameters.

1. هيكل ومزايا مستشعرات شبكة براغ الليفية المقاومة للضغط العالي (مستشعرات FBG) (مقياس حرارة FBG، مسبار درجة حرارة FBG)

تحدد القدرة على مقاومة الضغط (الخارجي والداخلي والجانبي) بشكل مباشر البيئات التي يمكن استخدام مستشعرات FBG فيها وتؤثر أيضًا على الإنشاء الهندسي لمستشعرات FBG (مسابير FBG). دعنا نشرح بإيجاز المزايا التي توفرها مقاومة الضغط الجيدة لمستشعرات FBG (مسابير FBG) من منظور مقاومة الضغط.

الشكل 1

The 'OFSCN® Capillary Seamless Steel Tube FBG Sensor' produced by DCYS is made of stainless steel seamless tubes. Benefiting from the characteristics of stainless steel material و seamless tube structure, this series of FBG sensors ( FBG probes) has high pressure resistance. The high pressure resistance mentioned here includes the ability to withstand external pressure, internal pressure, و lateral pressure.

الشكل 2	الشكل 3

2. Pressure  Resistance of OFSCN® Capillary® Seamless Steel Tube Fiber Bragg Grating Sensors (FBG sensors, FBG probes)

The main body of the OFSCN® Capillary Seamless Steel Tube FBG sensor ( FBG probe) is made of stainless steel seamless tubes. The standard outer diameter of the OFSCN® Capillary Seamless Steel Tube FBG sensor ( FBG probe) is 0.9 mm, with a wall thickness of 0.18 mm (see Figures 1 و 2). Based on our calculations, the pressure resistance of the main body of the sensor is greater than 180 MPa (external pressure).。

الشكل 4

قد لا يكون الرقم 180 ميجا باسكال مفهومًا بشكل بديهي للكثيرين. في الحياة اليومية، يبلغ الضغط الجوي حوالي 0.1 ميجا باسكال، وهو ما يعادل تقريبًا ضغط الماء على عمق 10 أمتار تحت الماء. يبلغ 1 ميجا باسكال تقريبًا ضغط الماء على عمق 100 متر تحت الماء، و180 ميجا باسكال يعادل تقريبًا ضغط الماء على عمق 18,000 متر تحت الماء.

The deepest known point on Earth is the Mariana Trench, with a depth of 11,034 meters (approximately 110 MPa of pressure). If someone commissioned us to produce an OFSCN® Capillary Seamless Steel Tube FBG Sensor of such length و threw it into the deepest part of the Earth for fiber sensing, there would be no problem. Our sensor would not be damaged by the water pressure at that depth. Because our philosophy is: 'OFSCN®, make optical fiber stronger!'

الشكل 5

In terms of pressure resistance, there is no comparison between OFSCN® Capillary Seamless Steel Tube FBG Sensors و traditional FBG sensors. They are not product in the same level, so there is no need to elaborate further.

3. Application و Construction Advantages of OFSCN® Capillary Seamless Steel Tube Fiber Bragg Grating Sensors (FBG sensors , FBG probes) with High Pressure Resistance

The high pressure resistance of OFSCN® Capillary Seamless Steel Tube FBG Sensors greatly expands their range of applications. In the past, it was challenging to measure high-pressure locations deep within the Earth, but with the availability of OFSCN® seamless steel tube products (including FBG sensors, distributed fiber optic sensors, special fiber optic jumpers, و seamless steel tube sensing cables), communication و measurement in these high-pressure locations have become less difficult.

In terms of engineering construction, similar to the advantages of high tensile strength, the high pressure resistance of OFSCN® Capillary Seamless Steel Tube FBG Sensors directly reduces the difficulty و losses in construction, thus lowering the installation cost of the grating sensors.

علاوة على ذلك، من المحتم أن تحدث اصطدامات أثناء الإنشاء الهندسي، وقد يتم تغطية مستشعرات الشبكة أو ضغطها مباشرة بمواد أخرى أو أجسام قيد الاختبار. في مثل هذه الحالات، تصبح قدرة المستشعرات على تحمل الضغط الجانبي حاسمة.

Based on our calculations, the standard OFSCN® Capillary Seamless Steel Tube FBG Sensor can withstand lateral pressure of more than 9000 N. In practical applications, our FBG sensors can be placed on the road surface و withstand repeated pressure from small cars. Apart from surface wear, there will be no actual damage to the sensors.