Ultrasonic ToF (Time-of-Flight) Sensors Product Top Page Catalog Technical Support Tools Developer Kits 「SmartSonic™ Platform」(InvenSense Brand) The TDK SmartSonic™ Platform is a comprehensive development kit for Ultrasonic ToF (Time-of-Flight) Sensors. InvenSense Developers Corner InvenSense developers corner provides all the tools you need for intelligent sensor application development.