下探式红外线轴温探测器(简称下探式)是探测轴箱侧壁的温度,这个温度比轴箱顶部温度低得多,因而采用下探方式的大都不愿意采用现在流行的光栅做背景,以免进一步降低灵敏度(因为这种光栅在开通时,也只有不足50%的轴温信号进入探头)。那么,不使用光栅的下探式探头的背景 Detector infrared axis temperature detector (referred to as the probe) is the temperature of the probe shaft wall temperature, the temperature is much lower than the top of the axle box, which uses most of the way to explore the reluctance to use the current popular raster background , So as not to further reduce the sensitivity (because the grating when turned on, only less than 50% of the shaft temperature signal into the probe). Well, the background of a probing probe that does not use a grating