@inproceedings{c733ccab9aad45469dfcf5784cd884a6,
title = "MEMS ultrasonic transducers for highly sensitive Doppler velocity sensor for low velocity measurement",
abstract = "This paper describes a novel, highly-sensitive ultrasonic Doppler velocity sensing system for low velocity measurement in portable navigation systems. It is a compact velocity sensing system, in which MEMS ultrasonic transducers are incorporated with phase-locked-loop (PLL) circuitry for frequency detection and signal processing. The achieved voltage-velocity sensitivity is 0.22 V/(mm/s) and the minimum detectable velocity is 0.67 mm/s, corresponding to 0.11 Hz in Doppler frequency. To the best of our knowledge, the minimum detectable velocity is the best reported in literature. Also, the output of the PLL is a DC voltage linearly related to the velocity, and there is no need to convert the frequency shift to analog voltage.",
keywords = "Doppler Sensor, Micro-ElectroMechanical System (MEMS), Phase-Locked-Loop (PLL), Velocity Sensor",
author = "Lingtao Wang and Youngki Choe and Chen, {Shih Jui} and Lukas Baumgartel and Kim, {Eun Sok}",
year = "2011",
doi = "10.1109/TRANSDUCERS.2011.5969228",
language = "???core.languages.en_GB???",
isbn = "9781457701573",
series = "2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11",
pages = "719--722",
booktitle = "2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11",
note = "2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11 ; Conference date: 05-06-2011 Through 09-06-2011",
}