A New Submersion Detection Sensor Using Two Resistance Temperature Detectors Operating on the Thermal Equilibrium...

Area of Science:

• Sensor Technology
• Thermal Engineering
• Environmental Monitoring

Background:

• Traditional submersion detection methods may lack reliability and stability.
• Accurate environmental monitoring is crucial for safety in various industrial applications.
• Existing sensors may be susceptible to environmental factors like humidity and rainfall.

Purpose of the Study:

• To propose and evaluate a new submersion detection sensor with improved reliability and stability.
• To utilize the thermal equilibrium principle for effective submersion detection.
• To assess the sensor's performance under diverse environmental conditions.

Main Methods:

• The sensor employs two Resistance Temperature Detectors (RTDs) operating on the thermal equilibrium principle.
• One RTD serves as a reference for ambient temperature, while the second is self-heated.
• A signal conditioning circuit detects temperature differences between the RTDs to indicate submersion.

Main Results:

• The sensor demonstrated stable performance across varying ambient temperatures, humidities, and simulated rainfall.
• Dynamic performance evaluation showed reliable response times under different pre-submersion air and post-submersion water temperatures.
• The temperature difference between RTDs was consistently lower in water than in air, confirming the principle.

Conclusions:

• The proposed submersion detection sensor exhibits high reliability and stability.
• Its performance is robust against environmental variations, making it suitable for real-world applications.
• The sensor is a promising candidate for integration into aircraft, ships, and industrial equipment.