The reference design for a battery-powered sensible alarm system (SAS) employs synthetic intelligence (AI)-based sensor fusion algorithm that enhances acoustic occasion detection (AED) processing with a wake detection engine. This reference design answer unveiled by Infineon Expertise contains the next main constructing blocks:
- A excessive signal-to-noise ratio (SNR) analog MEMS microphone
- A digital stress sensor
- An Arm Cortex M4F-based microcontroller
- Sensor fusion algorithm based mostly on precisely-trained AI/ML fashions
The sensor fusion software program algorithm, which runs on a CY8C62 PSoC 6 microcontroller, combines acoustic and stress sensor knowledge to precisely differentiate between sharp sounds and distinctive audio/stress occasions. The occasions might be created when glass is damaged or a home alarm is triggered as a consequence of a window or door opening. Furthermore, the AI-based sensor fusion algorithm can get rid of different background sounds or stress occasions that may generate false positives as a result of similarities to alarm techniques.
Supply: Infineon
In response to David Jones, head of promoting and enterprise improvement for Intuitive Sensing Options at Infineon Applied sciences, what’s distinctive about this answer is that it makes use of AI fashions somewhat than sound frequencies to detect acoustic occasions.
Then there are energy consumption advantages ensured by deep-sleep modes within the microcontroller. Solely IM73A135V01 MEMS microphone is always-on, listening to potential acoustic occasions. Right here, Infineon has changed the digital MEMS microphone with an analog IM73A135V01 MEMS microphone to decrease the ability utilization.
The DPS310 digital stress sensor works alongside the MEMS microphone to facilitate sound classification and wake-on acoustic occasion detection. The PSoC 6 microcontroller controls the power-up sequence for the stress sensor.
Your entire sensible alarm system design is packed right into a system-in-package (SiP), which builders can embed into safety use instances like thermostats. Builders can use their very own wi-fi know-how to supply connectivity for the Web of Issues (IoT) and cloud techniques. “It’s an entire answer that builders can use to construct low-power safety and surveillance merchandise for {the marketplace},” Jones stated.
The sensible alarm system (SAS) reference design is obtainable now whereas reference boards will likely be obtainable within the third quarter of 2022.
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