| 释义 |
passive sensor
无源［被动］探测器
In access control, a sensor that does not generate or transmit a signal but detects changes in radiation patterns produced by a disturbance in the ambient radiation or the introduction of a source of radiation.
在存取控制中,一种自己不产生或传送信号的探测器,它能检测出由周围幅射的 干扰或由引进的幅射源产生的幅射情况的变化。
参阅active sensor。 |