Design of twisted-pair type of frustrated total internal reflection passive fiber-optic liquid level sense measurement system

Zhang Huixin; Feng Lishuang

doi:10.3788/IRLA201746.1217001

In order to meet the growing requirements of some national projects, such as the aerospace, monitoring of fuel liquid level, as a key parameter of the flight evaluation, directly affects the efficiency of all kinds of crafts. A liquid level sensor system, which can achieve both single-point discrete and multi-point continuous measurement, was designed based on the bending loss of the plastic optical fiber and the total internal reflection principle. After description of the theory, the actual equipment was used to test the theoretical analysis, illustrate the operating principle, systematical composition and the advantages of the technology were inustrated, simultaneously the feasibility of liquid level measuring experiments in theory was analyzed. Furthermore, both discrete and continuous liquid level sensing systems were finished. The verifying experimental system was also set up. The experimental results show the proposed liquid level sensor system not only can realize the measurement of the liquid level, but also has good consistency and simple implementation. The continuous liquid level sensing system can reach the test range of 450 mm with a sensitivity of 0.808 3 W/mm, showing a significant reference for the engineering application.

Design of twisted-pair type of frustrated total internal reflection passive fiber-optic liquid level sense measurement system

1. Science and Technology on Inertial Laboratory,Beihang University,Beijing 100191,China;

2. Precision Opto-mechatronics Technology Key Laboratory of Education Ministry,Beihang University,Beijing 100191,China;

3. Key Laboratory of Instrumentation Science and Dynamic Measurement,Ministry of Education,North University of China,Taiyuan 030051,China;

4. Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China

Received Date: 2017-04-10

Rev Recd Date: 2017-05-20

Publish Date: 2017-12-25

Key words:

Abstract: In order to meet the growing requirements of some national projects, such as the aerospace, monitoring of fuel liquid level, as a key parameter of the flight evaluation, directly affects the efficiency of all kinds of crafts. A liquid level sensor system, which can achieve both single-point discrete and multi-point continuous measurement, was designed based on the bending loss of the plastic optical fiber and the total internal reflection principle. After description of the theory, the actual equipment was used to test the theoretical analysis, illustrate the operating principle, systematical composition and the advantages of the technology were inustrated, simultaneously the feasibility of liquid level measuring experiments in theory was analyzed. Furthermore, both discrete and continuous liquid level sensing systems were finished. The verifying experimental system was also set up. The experimental results show the proposed liquid level sensor system not only can realize the measurement of the liquid level, but also has good consistency and simple implementation. The continuous liquid level sensing system can reach the test range of 450 mm with a sensitivity of 0.808 3 W/mm, showing a significant reference for the engineering application.

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Reference (15)

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Design of twisted-pair type of frustrated total internal reflection passive fiber-optic liquid level sense measurement system

doi: 10.3788/IRLA201746.1217001

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