Ahmed S A,Hussain T M,Saadawi T N.Active and passive infrared sensors for vehicular traffic control[C]//IEEE 44th Vehicular Technology Conference,New York, 1994:1393-1397.Ahmed, S.A.; Hussain, T.M.; Saadawi, T.N. Active and Passive Infrared Sensors for Vehicular Traffic Control. ...
does not require any input device can complete its function -- is not smart. Resistance, capacitance, inductance, connectors are passive. The active device can control the voltage or current in a circuit or create switching action -- it is intelligent. Diode, triode, IC, crystal, sensors are...
Sensitivity to soil moisture by active and passive microwave sensors The backscatter measured by a radar and the emission measured by a radiometer are both very sensitive to the moisture content m, of bare-soil surfaces. Vegetation cover complicates the scattering and emission processes, presumably ...
Passive sensors use naturally emitted light from the sun. Without the sun, there wouldn’t be passive remote sensing. As you’re about to find out, there arehundreds of remote sensing applicationsthat use passive and active sensors. But first, let’s dig a bit deeper into both types of re...
Active wheel-speed sensors require power to operate, whereas passive units do not. There are two types of active wheel-speed sensors: a Hall-effect sensor and a magneto-resistive sensor. A Hall-effect sensor requires either a toothed or magnetic ring to generate a voltage signal, whereas a ...
PASSIVE AND ACTIVE SENSORS FOR ULTRASOUND TRACKING 申请(专利)号: US201716468022 申请日: 2017-12-08 专利号: US2020008775A1 公开公告日: 2020-01-09 主分类号: A61B8/08 申请权利人: KONINKLIJKE PHILIPS N.V. 公开国代码: US 分类号: A61B8/08; A61B5/06; A61B90/98; A61B8 发明设计人: ...
cancontrolthevoltageorcurrentinacircuitorcreateswitchingaction--itisintelligent.Diode,triode,IC,crystal,sensorsareactive.Alsocalledactivecomponents.Activecomponentsandpassivecomponentsiscalledalayman.Shouldbecalledactiveandpassivecomponents.Asimpledefinitionof1.passivedevicesIftheelectroniccomponentswork,nointernalpowerin...
However, communications in this spectrum band are limited by the coexistence of passive users that (i) do not transmit and (ii) only use high-sensitivity Radio Frequency (RF) sensors for Earth exploration, weather monitoring and radio-astronomy6,12. Passive users can be negatively impacted by ...
The present article provides a brief review of the open literature concerning applications of piezoelectric sensors and actuators for active and passive vibration control. Then, some recent advances on this subject are presented. In particular, the following topics are discussed in detail: i) modeling...
Definition 3 Coverage & k-coverage Given a set of sensors, S=s1,s2,…,sn, in a 2D area X. Each sensor si,(i=1,…,n), is located at coordinate (xi,yi) inside X and has a sensing range of ri which is usually called sensing radius. Any point in X is said to be covered by...