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利用红外技术检测火车轴温是铁路部门一项十分重要的技术革新,它对于保证铁路运输安全和提高运输效率发挥了重要的作用。目前国内研制的检测轴温的红外探头,其敏感元件主要有浸没型热敏电阻和热电探测器(以下简称PED)两种。前者较早使用,技术上趋于成熟;而后者用得较少,且迄今未见国外有同类产品报导。虽然PED具有灵敏度高、不需工作偏压、价廉及长寿命等优点,但因其工作原理的特殊性,若使用不当常常会出现一些反常
The use of infrared technology to detect train shaft temperature is a very important technological innovation in the railway sector. It plays an important role in ensuring railway transport safety and improving transport efficiency. At present, there are two types of infrared probes that are used to detect the shaft temperature. The sensitive components are mainly immersed thermistors and pyroelectric detectors (hereinafter referred to as PEDs). The former used earlier, the technology tends to mature; the latter with less, and so far no similar products have been reported abroad. Although the PED has the advantages of high sensitivity, no work bias, low cost and long life, but due to the particularity of its working principle, if improper use often appear some abnormal