On an object study for measuring result of mechanical thermohygrograph, this paper discussed the source of error and uncertainty evaluation on humidity measuring result of mechanical thermohygrograph.
以机械式温湿度计测量结果为研究对象，论述了机械式温湿度计湿度测量结果的误差来源及其测量不确定度的评定。
In order to ensure that temperature and humidity measurement precision, the hardware circuit error analysis, put forward the system error of the method to improve.
为了保证温湿度测量精度，对硬件电路进行了误差分析，并且提出了系统误差的改善方法。
Sensor's error caused by temperature and humidity could be compensated by choosing temperature and humidity as input components of the PCA model.
把温湿度信息作为PCA输入分量，能较好补偿温湿度造成的传感器误差。
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