<p>Enclosure door status may be detected. Light may be transmitted from a first component. The light may be received at a second component when a door is in a substantially closed position. The door may be mounted on a structure wherein an angle of incidence between the light transmitted from the first component and the second component increases proportionally to an angle of incidence between the door and the structure. The door may be determined to be in an open position when a light intensity received at the second component is less than a predetermined light intensity value that corresponds to a predetermined angle of incidence between the door and the structure. The first component may comprise a low divergence light emitting diode (LED) transmitter that may be configured to transmit light at a wavelength of approximately 950 nm. The second component may comprise a low profile silicon photodiode.</p>
申请公布号
WO2008088340(A1)
申请公布日期
2008.07.24
申请号
WO2007US01490
申请日期
2007.01.19
申请人
GEORGIA TECH RESEARCH CORPORATION;HARAN, TERENCE;JAMES, JONATHAN, C.;ROBERTS, DAVID