Related Experiment Video
Updated: Sep 5, 2025
10:53
Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
Published on: March 12, 2019
7.1K
Simultaneous Measurement of Temperature and Pressure Based on Fabry-Perot Interferometry for Marine Monitoring
Shengqi Zhang1, Yongchang Mei1, Titi Xia1
1Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China.
Sensors (Basel, Switzerland)
|July 9, 2022
Summary
This study presents a novel seawater sensor using a polyimide (PI) tube-based Fabry-Perot interferometer (FPI) and fiber Bragg grating (FBG). The sensor accurately measures temperature and pressure simultaneously for marine monitoring.
Area of Science:
- Oceanography
- Materials Science
- Optical Engineering
Background:
- Accurate seawater temperature and pressure measurements are crucial for understanding ocean environmental evolution.
- Existing sensors may face limitations in sensitivity, cross-effect compensation, and multiplexing capabilities.
Purpose of the Study:
- To develop and demonstrate a novel, highly sensitive sensor for simultaneous seawater temperature and pressure measurement.
- To leverage the unique properties of polyimide (PI) and fiber Bragg grating (FBG) for enhanced sensor performance.
Main Methods:
- Fabrication of a seawater sensor using a polyimide (PI) tube-based Fabry-Perot interferometer (FPI).
- Integration of a fiber Bragg grating (FBG) for temperature cross-effect compensation.
- Utilizing the sensitivity matrix method for simultaneous data acquisition.
Main Results:
- The sensor achieved a temperature sensitivity of 18.910 nm/°C and a pressure sensitivity of -35.605 nm/MPa.
- Demonstrated simultaneous and accurate measurement of both temperature and pressure.
- The polyimide material offered improved sensitivity due to its thermo-optical and elastic properties.
Conclusions:
- The proposed PI tube-based FPI and FBG sensor offers a promising solution for marine monitoring.
- Advantages include easy fabrication, compact size, multiplexing capability, and long-distance measurement.
- This sensor technology is competitive for advanced oceanographic research and environmental surveillance.
Related Concept Videos
01:16Measurement of Fluid Pressure
297
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
297
03:02Constant Pressure Calorimetry
86.2K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
86.2K
01:14Temperature Measurement Sites
2.1K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
2.1K
01:28Pipe Flowrate Measurement
793
In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...
The orifice meter is a simple,...
793
01:20Pressure Gauges
4.0K
Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
4.0K
01:28Pipe Flowrate Measurement: Problem Solving
598
A spray tank system is engineered to uniformly distribute a pest-control liquid across plants by using a pressurized mechanism. The tank, pressurized to 150 kPa, holds the pesticide at a height of 0.80 meters. Liquid flows from the tank through a 1.9 meter pipe with a diameter of 0.015 meters, angled at 0.698 radians, ultimately reaching a 0.007 meter nozzle that sprays the pesticide. Accurate calculation of the system's flow rate is crucial to ensure uniform application, and this is...
598