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Smartphone-, tablet- or laptop-based motion detection system using Doppler Effect and audio processing
Smartphone-, tablet- or laptop-based motion detection system using Doppler Effect and audio processing
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机译：智能手机 - 基于平板电脑或笔记本电脑的运动检测系统，使用多普勒效应和音频处理
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摘要
A system and methods are described that implement a consumer device (smartphone-, tablet- and/or lap top) configured to detection motion via an application program installed on the devices non-transitory medium. The application program contains computer readable instructions instructing the device to perform a number of tasks and configures the device processor to detect motion using Doppler Effect and audio processing. The system uses existing hardware and software in devices (smartphones, tablets or laptops) including the devices non transitory computer readable medium comprising the application program with computer readable instructions, which upon activation, commands the device to transmit ultrasound (18.0-22.0 kHz) and receive the return sound, while the application program configures the device processor to use audio processing to identify shifts in transmitted sound frequency caused by Doppler Effect created by movement of an object or a person. The audio processing effectively turns the device into a short-range motion detector—effective up to 10 meters—detecting movement (not speed or direction) of human sized objects. When Doppler Effect data processing confirms movement, the application program can command the device to initiate a sequence of actions.
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