制动盘表面温度和发射率测量的两色测温
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制动盘表面温度和发射率测量的两色测温(中文6200字,英文4300字)
摘要
制动盘表面温度和发射率用一个光纤两色高温计测量。两色高温计是由氟化物玻璃光纤组成，碲镉汞探测器配备两个带宽滤波器、数据采集设备和调理。两色高温计在200℃-800℃温度范围测量制动器制动8微秒时分辨率盘温度。为获得使用信号校正公式的已知温度黑体用于计算的真实温度。获得了校准结果是温度和发射率的不确定性的估计。试验共进行了已知的温度目标和良好的相关关系和我们两色高温计和商业两色高温计所得的计算结果发现。保持制动和减速刹车制动试验台上进行的测试使我们能够达到在制动过程中制动盘表面温度和发射率的实验。
关键词：两色高温计，制动盘温度，发射率
Measurements of brake disc surface temperature and emissivity by two-color pyrometry
ABSTRACT
A fiber optic two-color pyrometer was developed for brake disc surface temperature and emissivity measurements. The two-color pyrometer consists of a fluoride glass optical fiber, two HgCdTe detectors equipped with bandwidth filters and a data conditioning and acquisition device. The two-color pyrometer measures the brake disc temperature in the 200–800 °C range with a time resolution of 8 μs. The calibration formula for the signals obtained using a blackbody of known temperature is used to compute the true temperature. The uncertainty estimation for temperature and emissivity was obtained from the calibration results. Tests were carried out on known temperature target and a good correlation was found between results obtained with our two-color pyrometer and those obtained with a commercial two-color pyrometer. Hold braking and deceleration braking tests performed on a braking test bench enabled us to reach the brake disc surface temperature and emissivity during braking. Experimental results show a significant variation of emissivity during braking. Direct measurement of emissivity was carried out on the brake disc after braking and shows the emissivity dependence with the surface quality.
Keywords:Two-color pyrometer, Brake disc Temperature ,Emissivity