Introducing the CH201 Long-Range Ultrasonic Time-of-Flight Sensor
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Chirp’s MEMS ultrasonic technology leverages a proprietary Time-of-Flight (ToF) range sensor in a 3.5 mm x 3.5 mm package that combines a MEMS ultrasonic transducer with a power-efficient digital signal processor (DSP) on a custom low-power mixed-signal CMOS ASIC. The sensor handles a variety of ultrasonic signal-processing functions, enabling customers flexible industrial design options for a broad range of use-case scenarios, including range-finding, presence/proximity sensing, object-detection/avoidance, and position-tracking. |
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Chirp’s MEMS ultrasonic ToF sensor solutions offer numerous advantages over optical ToF sensors:
- Ultra-low power consumption
- Accurate range measurement regardless of target size or color; even optically transparent objects such as windows and glass doors/walls are reliably detected
- Immunity to ambient noise
- Ability to operate in all lighting conditions – unlike IR sensors, which do not work in direct sunlight
- Ensures eye-safety – contrasting with laser-based IR ToF sensors – and yet not perceivable by house pets
- Detects objects over a field-of-view up to 180° – enabling a single sensor to support room-scale sensing
Presence
Chirp’s ultralow power ultrasonic sensor consumes only microwatts while performing ultrasonic echolocation. This enables always-on sensing for wake-on-approach application for tablets, notebooks, monitors, smart locks, security cameras, and other smart-home devices even when they are running on battery only. What will you use it for? |
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Motion
Chirp offers an easy-to-use ultrasonic software library (USL) that provides 2D and 3D position tracking using Chirp’s proprietary hardware. The ultrawide field-of-view means that the ultrasound-based systems do not suffer from occlusion problems that plague optical tracking systems. The library provides fast update rates using a low-cost sensor hub. Application-specific solutions for wearable and VR/AR/gaming products are available today.
Range Finding
Chirp’s ultrasonic sensing solution provides millimeter-accurate range information. Unlike optical solutions, ultrasonic rangefinding works in any lighting conditions, including full sunlight, and can detect any color and materials, including optically transparent targets like glass windows. Solutions available today for mobile, robotics, and home automation.
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