Moving object detection and tracking based on Doppler ultrasound

Abstract

Doppler ultrasound has been widely used method in fetal heartbeat monitoring. However, it is vulnerable to continuous monitoring due to the need for frequent relocation of ultrasound probes and misalignment of acoustic beams due to movement of pregnant women and fetuses. We propose a tracking system based Doppler signal to compensate for the target's motion. The fetal heart rate monitoring prototype was implemented by integrating a 5-channel Doppler signal detectable probes with a motor unit in 2 degree of freedom. The Doppler signal had the highest power around the point where the target was located. The prototype can distinguish the target position by the power of the Doppler signal.