公开(公告)号：WO1997031238A1

公开(公告)日：1997-08-28

申请号：PCT/US1997002383

申请日：1997-02-18

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  GERSHENFELD, Neil ,  SMITH, Joshua, R.

IPC: G01B07/00

CPC classification number: B60R21/01532 ,  B60N2/002 ,  B60N2/28 ,  B60N2/286 ,  B60N2/2863 ,  B60R21/01556 ,  G01B7/003 ,  G01B7/004 ,  G06F3/011 ,  G06F3/017 ,  G08B13/26 ,  H03K17/955 ,  H03K2217/94052 ,  H03K2217/960775

Abstract: Apparatus and methods for resolving presence, orientation and activity of a person within a defined space utilizes at least one electrode proximate to the space to be observed. An AC signal is applied to the electrode, and the current measured from that electrode and also to any other electrodes included in the system, and which are effectively connected to the ground return of the AC-coupled electrode. A person (or object) to be sensed intercepts a part of the electric field extending between the AC-coupled "sending" electrode and the other "receiving" electrodes, the amount of the field intercepted depending on the size and orientation of the sensed person, whether or not the person provides a grounding path, and the geometry of the distributed electrodes. Given the nonlinear spatial dependence of the field, multiple electrodes can reliably distinguish among a set of expected cases. The invention can be configured to detect not only static positions and orientations, but also motion through a defined space. This is accomplished by taking sequential measurements at different times and utilizing the time variation in signal magnitudes as well as the absolute magnitudes themselves.

Abstract translation: 用于解决在限定空间内的人的存在，取向和活动的装置和方法利用靠近待观察空间的至少一个电极。 对电极施加AC信号，从该电极测量的电流以及系统中包含的任何其它电极，并且有效地连接到AC耦合电极的接地回路。 要被感测的人（或物体）拦截在AC耦合的“发送”电极和另一个“接收”电极之间延伸的一部分电场，根据所感测的人的大小和方向截取的场的量 无论人是否提供接地路径，以及分布电极的几何形状。 给定场的非线性空间依赖性，多个电极可以可靠地区分一组预期情况。 本发明可以被配置为不仅检测静态位置和取向，而且检测通过限定空间的运动。 这是通过在不同时间进行连续测量并利用信号幅度的时间变化以及绝对幅度本身来实现的。