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词汇 Thermic balance
分类 英语词汇 英语翻译词典
释义

Thermic balance

中文百科

辐射热测量计 Bolometer

（重定向自Thermic balance）

辐射热测量计是一种物体测量辐射热量的传感器。
简明原理: 吸收光的辐射功率 → 温度升高 → 改变电阻大小。
特点:该仪器具有很高的灵敏性。相对于其他辐射探测器（比如光电管及光电二极管）而言，辐射热测量计具有比较高的带宽，以及对比较难或者未知的射线的探测（比如远红外射线和太赫射线）

常用有两种：

英语百科

Bolometer 辐射热测量计

（重定向自Thermic balance）
Spiderweb bolometer for measurements of the cosmic microwave background radiation. Image credit: NASA/JPL-Caltech.
Conceptual schematic of a bolometer. Power, P, from an incident signal is absorbed by the bolometer and heats up a thermal mass with heat capacity, C, and temperature, T. The thermal mass is connected to a reservoir of constant temperature through a link with thermal conductance, G. The temperature increase is ΔT = P/G. The change in temperature is read out with a resistive thermometer. The intrinsic thermal time constant is τ = C/G.
Concept du bolomètre.

A bolometer (Greek, βολόμετρον or bolometron; βολο- meaning of thrown things; and -μετρον, measurer) is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley.
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