首页

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服务支持

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常见问题

常见问题

知识中心

如何通过调整发射率来确保准确测温？

1、确定要测量材料的发射率；

2、将红外热像仪设置为正确的发射率值；

3、尽量减少反射。避免直接测量反射表面，或用高发射率材料覆盖反射表面。

不同物体的发射率相同吗？

物体的发射率与物体的材质、表面结构、温度等有关，不同的材料有不同的发射率。一般电绝缘、热绝缘的材料发射率都比较高；金属发射率比较低。表面抛光处理会降低发射率；磨砂处理会增高发射率。例如，铝等抛光金属的发射率较低，约为 0.1，而木材或织物等材料的发射率较高，约为 0.9。人体皮肤的发射率约为 0.98，因此能非常有效地发射红外辐射，使红外热像仪能够准确捕捉体温和热信号。