Car Interior Privacy Exposure Warning: How Non-Optical MEMS Sensors Safeguard Passenger Safety and Privacy （Part 2）

ADW’s MEMS Ultrasonic Sensors: Principles and Advantages

ADW’s MEMS ultrasonic CPD solution is based on advanced PMUT technology and includes two transmit-receive integrated sensors. These sensors emit and receive ultrasonic signals, working with dynamic detection algorithms and integrated modules to enable life detection capabilities.

The system analyzes full-range ultrasonic reflections to identify movement, breathing, and environmental changes — achieving breath-level precision in detection.

Experimental results show that ADW’s MEMS ultrasonic CPD system fully meets Euro NCAP regulatory standards.

The sensor module is compact (only 30×20×5 mm), much smaller than traditional modules, allowing flexible installation. It offers a detection range exceeding 1 meter and a 180° field of view, providing comprehensive coverage of the cabin.

Privacy Protection Advantages: A Safer Alternative to Optical Systems

Compared to camera-based systems, MEMS ultrasonic sensors offer significant privacy protection benefits.

Since ultrasonic sensors do not capture images, they detect presence through motion and vital signs — eliminating the root cause of visual data leaks.

This non-optical characteristic makes MEMS ultrasonic sensors safe even in private environments, as they record no personally identifiable biometric data.

Additionally, the surface-mounted design preserves the car’s interior aesthetics while keeping the sensors discreetly hidden — further enhancing privacy.