A Design Technique and Structure for Optical Fibre Vibration Sensor

This paper reviewed techniques of vibration sensors, studied structure and working principle of phase modulated optical fiber vibration sensor, and designed a new structure of non-contact optical vibration sensor. Use this structure, expect accuracy of 0.1um can be obtained in the range of 1mm. At the same time, this system is simple, anti-interference ability, high reliability and ease of practical.

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Fiber Optic Vibration Sensors

Optoelectronics ◽

10.5772/intechopen.94013 ◽

2021 ◽

Author(s):

Putha Kishore ◽

Dantala Dinakar ◽

Manchineellu Padmavathi

Keyword(s):

Optical Fiber ◽

Measurement Method ◽

Fiber Optic ◽

Sensor Response ◽

Vibration Sensor ◽

Vibration Measurement ◽

Sensor Design ◽

Plastic Optical Fiber ◽

Intensity Modulated ◽

Vibration Sensors

The sensors presented in this chapter are fiber optic intensity modulated vibrations sensors which are non-contact (extrinsic sensor) to the vibrating object. Three sensors presented make use of non-contact vibration measurement method with plastic fiber using distinct designs, improvement of the sensor response and advantages of one sensor over the other for diverse applications. First discussed about dual plastic optical fiber vibration sensor design and its response. Secondly, discussed about 1x2 fused coupler plastic optical fiber vibration sensor design with advantages over the first one. Finally, discussed about the 2x2 fused coupler plastic optical fiber vibration sensor design along with advantages than other two methods. At the end reported the final results with comparison.

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Study on Non-Contact Optical Vibration Senor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.433-435.233 ◽

2013 ◽

Vol 433-435 ◽

pp. 233-236

Author(s):

Ke Xue Sun ◽

Xian Jun Li ◽

Man Li ◽

Qing Yun Yan ◽

Xie Feng Cheng ◽

...

Keyword(s):

Optical Fiber ◽

Optical Sensor ◽

Fiber Optic ◽

Low Cost ◽

Measurement Range ◽

High Accuracy ◽

Vibration Sensor ◽

Vibration Measurement ◽

Good Reliability ◽

Optical Vibration

The vibration measurement is one of the new application in the optical sensor. This paper studies a new non-contact optical vibration sensor, and implements the Optical fiber vibration sensor based on FPGA. The totally available measurement range arrived over 300um, and the accuracy of 0.1 um can be obtained . This fiber optic vibration sensor has a low cost, good reliability, and high accuracy measurements.

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A Design and Implementation for Optical Fibre Vibration Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.241-244.976 ◽

2012 ◽

Vol 241-244 ◽

pp. 976-979 ◽

Cited By ~ 2

Author(s):

Ke Xue Sun ◽

Hao Zheng ◽

Ji Bo Tang ◽

Xie Feng Cheng

Keyword(s):

Optical Fibre ◽

Fiber Optic ◽

Low Cost ◽

Measurement Range ◽

High Accuracy ◽

Vibration Sensor ◽

Sensor Technology ◽

Good Reliability ◽

Vibration Tests ◽

Optical Vibration

The progress of electronic sensor technology has greatly enhanced the performance of vibration tests, and improved the accuracy and velocity of the measurement. This paper studies and designs a new non-contact optical vibration sensor based on the intensity sensor,and implementation the Optical fibre vibration sensor based on FPGA. The totally available measurement range arrived over 300um. This fiber optic vibration sensor has the advantage of good reliability, low cost, high accuracy measurements.

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Optical Vibration and Acceleration Sensor With a Silicon Cantilever

10.1115/imece1999-0255 ◽

1999 ◽

Author(s):

Mitsuteru Kimura ◽

Katsuhisa Toshima ◽

Harunobu Satoh

Keyword(s):

Simple Model ◽

Optical Fiber ◽

Resonance Frequency ◽

Acceleration Sensor ◽

Frequency Range ◽

Silicon Cantilever ◽

All Optical ◽

New Type ◽

Good Agreement ◽

Optical Vibration

Abstract A new type all optical vibration and acceleration sensor using the combination of micromachined Si cantilever and optical fiber is proposed, and its fundamental characteristics are demonstrated. The light emitted from bulb-lens set into the V-groove is reflected at the reflector formed on the Si cantilever and then recoupled into the bulb-lens. Several sensors with different length (0.64–6.0 mm long) of the Si cantilever are fabricated to compare the theoretical resonance frequency fr obtained from the simple model and experimental ones. They had good agreement. From the sensing principle the sensing frequency range of the vibration is suitable below the fr of the Si cantilever of the sensor.

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Transparent and Flexible Vibration Sensor Based on a Wheel-Shaped Hybrid Thin Membrane

Micromachines ◽

10.3390/mi12101246 ◽

2021 ◽

Vol 12 (10) ◽

pp. 1246

Author(s):

Siyoung Lee ◽

Eun Kwang Lee ◽

Eunho Lee ◽

Geun Yeol Bae

Keyword(s):

Frequency Response ◽

High Sensitivity ◽

Vibration Sensor ◽

Human Machine Interaction ◽

High Transparency ◽

Vibration Sensors ◽

Low Stiffness ◽

Machine Interaction ◽

The Internet Of Things ◽

Ultrathin Membranes

With the advent of human–machine interaction and the Internet of Things, wearable and flexible vibration sensors have been developed to detect human voices and surrounding vibrations transmitted to humans. However, previous wearable vibration sensors have limitations in the sensing performance, such as frequency response, linearity of sensitivity, and esthetics. In this study, a transparent and flexible vibration sensor was developed by incorporating organic/inorganic hybrid materials into ultrathin membranes. The sensor exhibited a linear and high sensitivity (20 mV/g) and a flat frequency response (80–3000 Hz), which are attributed to the wheel-shaped capacitive diaphragm structure fabricated by exploiting the high processability and low stiffness of the organic material SU-8 and the high conductivity of the inorganic material ITO. The sensor also has sufficient esthetics as a wearable device because of the high transparency of SU-8 and ITO. In addition, the temperature of the post-annealing process after ITO sputtering was optimized for the high transparency and conductivity. The fabricated sensor showed significant potential for use in transparent healthcare devices to monitor the vibrations transmitted from hand-held vibration tools and in a skin-attachable vocal sensor.

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