公开(公告)号：US09880120B2

公开(公告)日：2018-01-30

申请号：US14337671

申请日：2014-07-22

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Simon J. Ghionea ,  David M. Hull ,  Gabriel L. Smith ,  Jeffrey S. Pulskamp ,  Sarah S. Bedair

IPC: G01N27/26 ,  G01R29/12

CPC classification number: G01N27/26 ,  G01R29/12

Abstract: According to embodiments, an electric field sensor having a sensor electrode is constructed of an electrically conductive material and having one or more outwardly protruding pillars. A screen electrode overlies the sensor electrode and has one or more openings which register with the one or more pillars on the sensor electrode. At least one piezoelectric actuator is connected to the screen electrode so that, when excited by a voltage signal, the piezoelectric actuator modulates the screen electrode toward and away from the sensor electrode at the frequency of the periodic voltage signal. An output circuit configured to detect a voltage, a current output, or both, between the sensor electrode and the screen electrode which is proportional in magnitude to the strength of the electric field.

公开(公告)号：US20160025666A1

公开(公告)日：2016-01-28

申请号：US14337671

申请日：2014-07-22

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Simon J. Ghionea ,  David M. Hull ,  Gabriel L. Smith ,  Jeffrey S. Pulskamp ,  Sarah S. Bedair

IPC: G01N27/26

CPC classification number: G01N27/26 ,  G01R29/12

Abstract: According to embodiments, an electric field sensor having a sensor electrode is constructed of an electrically conductive material and having one or more outwardly protruding pillars. A screen electrode overlies the sensor electrode and has one or more openings which register with the one or more pillars on the sensor electrode. At least one piezoelectric actuator is connected to the screen electrode so that, when excited by a voltage signal, the piezoelectric actuator modulates the screen electrode toward and away from the sensor electrode at the frequency of the periodic voltage signal. An output circuit configured to detect a voltage, a current output, or both, between the sensor electrode and the screen electrode which is proportional in magnitude to the strength of the electric field.

Abstract translation: 根据实施例，具有传感器电极的电场传感器由导电材料构成并具有一个或多个向外突出的支柱。 屏幕电极覆盖在传感器电极上并且具有与传感器电极上的一个或多个柱对准的一个或多个开口。 至少一个压电致动器连接到屏幕电极，使得当由电压信号激发时，压电致动器以周期性电压信号的频率将屏幕电极调节到传感器电极和远离传感器电极。 输出电路，被配置为检测传感器电极和屏幕电极之间的电压，电流输出或两者，其大小与电场的强度成正比。