Patch antenna sensor for wireless ice and frost detection

Area of Science:

• Wireless Sensor Networks
• Electromagnetics
• Materials Science

Background:

• Ice and frost accretion pose significant risks to infrastructure, particularly in the energy sector.
• Effective monitoring systems are crucial for preventing failures and ensuring operational safety.

Purpose of the Study:

• To develop and investigate a patch antenna sensor for wireless ice and frost detection.
• To assess the sensor's capability in distinguishing between frost, ice, and water.
• To evaluate the sensor's sensitivity to ice thickness and surface coverage.

Main Methods:

• A patch antenna sensor with T-shaped slots operating at 2.378 GHz was designed and fabricated.
• Detection involved monitoring the resonant amplitude and frequency of the transmission coefficient.
• Data analysis included fitting exponential functions to extract freezing rates.

Main Results:

• The sensor distinguished between frost, ice, and water, showing resonant frequency shifts of 32 MHz and 36 MHz, respectively.
• Sensitivity to ice thickness and surface area was demonstrated with frequency shifts of 2 MHz and 8 MHz.
• The freezing rate was successfully extracted from the recorded data.

Conclusions:

• The developed antenna sensor is a highly accurate and robust method for wireless ice accretion detection.
• This technology has potential applications in various industries, including the energy sector for monitoring wind turbines and power lines.