Long-range measurement system using ultrasonic range sensor with high-power transmitter array in air.

Area of Science:

• Acoustics
• Sensor Technology
• Signal Processing

Background:

• Ultrasonic range sensors offer simple construction and operation in adverse conditions like fog and smoke.
• Air absorption limits conventional ultrasonic systems to a few meters.
• Existing systems require enhancement for long-range applications.

Purpose of the Study:

• To investigate a long-range measurement system using an ultrasonic range sensor.
• To develop a high-power ultrasonic transmitter array to overcome range limitations.
• To evaluate the system's performance through simulation and experimental comparison.

Main Methods:

• Developed a high-power ultrasonic transmitter array with 144 elements in a 12x12 pattern.
• Utilized a receiver array with 32 receiving elements.
• Compared simulation and experimental results to analyze system characteristics.

Main Results:

• The high-power transmitter array achieved a sound pressure level >30dB higher at 5m compared to a single element.
• A measuring range exceeding 25m was successfully demonstrated.
• The system showed effectiveness in overcoming the range limitations of conventional ultrasonic sensors.

Conclusions:

• The developed high-power ultrasonic transmitter array significantly extends the measurable range of ultrasonic sensors.
• The system is suitable for long-range measurements even in challenging environmental conditions.
• The findings validate the effectiveness of the array design for enhanced ultrasonic sensing.