本文介绍了采用一种连续的具有相位差异的超声波来确定一对超声检测器相对位置的监测器,该监测器的超声波由一个远距离声源产生。它已被用于测量头部的垂直与水平方向的转动,而且能够很容易地推广用以测量人体其它任何部位的旋转或平移。该装置能在很宽的空间和动态范围内进行高灵敏度的记录。尽管该装置有很好的线性度和通道间的隔离性,但为了进一步提高线性度、减少串音,本文还介绍了一种以计算机为基础的线性/校准电路。该装置结构简单、价格低廉,经实验 This article describes a monitor that uses a continuous, phase-contrast ultrasound to determine the relative position of a pair of ultrasound detectors whose ultrasound is generated by a remote sound source. It has been used to measure the vertical and horizontal rotation of the head, and can easily be extended to measure the rotation or translation of any other part of the body. The device enables high-sensitivity recording over a wide range of spatial and dynamic ranges. Although the device has good linearity and channel-to-channel isolation, a computer-based linear / calibration circuit is introduced to further improve linearity and reduce crosstalk. The device has the advantages of simple structure, low price and experiment