|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||246/169A ; 250/342 ; 250/2521 ; 340/682|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 26 인용 특허 : 0|
Overheated railroad journal bearings, wheels, and other wheel components on a moving or stationary railroad train are detected by amplifying the current signal from an infrared radiation sensor comprising a pytoelectric cell. A reference temperature is sensed by chopping the incident infrared radiation with an asynchronous shutter that momentarilly closes at successive time spacings of shorter duration than the scanning period of the sensor. The amplified signal is converted to a digital signal and processed by a microcontroller and associated hardware a...
In a process for detecting an overheated component of a railroad train, the steps of: at a trackside location, sensing heat from said component with an infrared detector; comparing the response of said detector when infrared radiation is received form said component to the response of said detector when infrared radiation from the component is not received by the detector; and when said radiation is not being received, (a) pulsing a radiation-emitting element at two input energy levels to irradiate said detector, (b) comparing the output signals from sai...