Breath Detecting Mat With Vibration Sensor And Signal Processing Circuit

The patent introduces a mattress as an intermediary medium between the sensor and the user. The vibration sensor is embedded in the mattress, which transmits body vibrations to the sensor while providing comfort and contactless detection. This resolves the contradiction by enabling suitable contactless detection for babies and patients while maintaining signal quality through the mattress's vibration transmission properties.

The mattress serves as an intermediary that enables accurate vibration detection without direct contact with the user's body. The vibration sensor embedded in the mattress captures body vibrations through the mattress material, achieving accurate breath frequency calculation while maintaining suitability for babies and specific patients who require contactless monitoring.

The patent performs preliminary signal processing by generating fast-moving and slow-moving average signals and calculating their cross points before transmitting data to the host. This preliminary processing reduces the complexity of signal processing required at the host端, as the most critical noise filtering and feature extraction are already completed in the signal processing circuit, thereby reducing overall device complexity while maintaining accuracy.

The patent uses dynamic moving average processing with different lengths (fast-moving and slow-moving averages) to adaptively balance noise removal and processing time. The fast-moving average responds quickly to signal changes while the slow-moving average provides stable baseline, allowing the system to achieve good signal accuracy without excessive processing delay. This dynamic approach optimizes the trade-off between accuracy and time loss.