Raychel: Beyond Hearing, to Understanding — The AI Sensing Revolution in a Camera-Free Era

Raychel: Beyond Hearing, to Understanding — The AI Sensing Revolution in a Camera-Free Era

In the pursuit of smart technology, we've strayed into a paradox: devices must see everything to understand us. This has led to cameras invading our bedrooms, trading privacy for convenience.
Raychel chooses a more respectful, and more challenging path: We teach AI to “listen with its eyes closed.”
Core Vision: A Warm, Private Sleep Companion
Raychel is designed to be a partner that not only performs tasks efficiently but also provides emotional value. This is powered by our foundational “Understand-Remember-Resonate” triangle model, driven by unique sensing and model systems.

I. The Sensing System: A Symphony of mmWave Radar and LiDAR

To achieve deep perception without cameras, we built a multimodal non-visual sensing array:
  1. mmWave Radar: Your Contactless Sleep Guardian
    1. Function: Provides continuous body tracking.
    2. Application: Accurately determines if you're in bed, turning over, your sleep respiration rhythm, and even identifies REM sleep stages. Its penetration capability allows for sleep analysis comparable to professional wearables—without any device on your body, eliminating all discomfort.
  2. TOF LiDAR: The Foundation for High-Precision, Real-Time Interaction
    1. Function: Enables high-frequency, real-time fine-motion perception, such as hand tracking.
    2. Application: Powers elegant touch-free interaction. Snooze the morning alarm by simply raising your hand—no fumbling required. At night, a simple gesture can adjust lighting or pause audio, making interaction intuitive again.
Innovation and Challenge:
Forsaking ready-made cameras and open-source computer vision models meant building our entire signal processing and fusion stack from the ground up. Raw mmWave radar signals and LiDAR point-cloud data require complex proprietary algorithms to translate into accurate understanding of user state and intent. This path is engineering-intensive, but we believe eliminating the possibility of privacy leakage at the physical level is the most fundamental respect we can offer users. Every effort is worth it.

II. The Model System: “Dual-Brain” Intelligence via Mixture of Experts

To deliver both warm companionship and reliable advice, Raychel employs a Mixture of Experts architecture.
  1. Expert One: The Emotional Companion Engine
    1. Role: Your personal conversational partner and emotional steward.
    2. Mechanism: Builds your “digital memory” through long-term, personalized, on-device learning. It remembers your routine preferences, conversation style, and emotional patterns, aiming for deep resonance that “grows smarter with use,” proactively offering thoughtful greetings, relaxing suggestions, or simply a listening ear when you need it.
  2. Expert Two: The Health Analytics Engine
    1. Role: Your sleep data interpreter and advisor.
    2. Mechanism: Focuses on analyzing radar-based sleep data, using accessible models to translate complex “sleep stage charts” into understandable health insights and personalized improvement suggestions (clearly stated: not a medical device). The MoE architecture ensures professional advice and emotional exchange operate independently, each excelling in its domain.
Future Evolution: Towards Full Autonomy and Offline Operation
We are working with RWKV Language Model to deploy large language model capabilities directly on-device. This means future versions of Raychel will achieve:
  • Zero-Latency Interaction: Response times entering the millisecond range.
  • Absolute Privacy: 100% of conversations and memories remain on your device.
  • Intelligence Everywhere: Full functionality in any environment, providing consistent companionship.

III. The Builders: Forged from Deep Technical DNA

Raychel is born from a team with over 10 years of end-to-end product R&D and management experience. The founding team are sensor-domain specialists and serial entrepreneurs, whose previous ventures were backed by top-tier VCs including ZhenFund, Sequoia Capital, and Lenovo Capital. They have led the development of cutting-edge hardware like service robots, XR headsets, and brain-computer-interface headbands, possessing the complete capability to transform complex technology into elegant consumer products.

IV. In Conclusion

Raychel is more than a product; it's a technological statement about privacy, trust, and emotional connection. We use mmWave radar and LiDAR to perceive without invading, and MoE models to understand and resonate. What we are building is a true AI entity that understands boundaries, cherishes shared memories, and grows alongside you.
Before seeing, comes respect. After understanding, follows resonance.
Raychel — Visible intelligence. Invisible privacy.

 

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