Development of Portable Calibrator of Temperature and Humidity of Environmental Test Box
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摘要: 针对现有温湿度环境试验箱校准方法复杂、操作不便的现状,研制了一种便携式、智能化校准仪,详细介绍了校准仪的构成、测量原理等。该校准仪充分利用ADuC834集成的模拟信号采集功能,使硬件电路得到简化;经ADuC834内部软件计算,可直接读取温湿度值并将数据传输到计算机,方便检定校准工作。对整机进行测试,结果表明温度测量误差≤±0.1℃,湿度测量误差≤±3%RH,符合实际需求,并提高了工作效率。Abstract: According to the existing situation that calibration method of temperature and humidity of environmental test box is complex and inconvenient,a portable and intelligent calibrator was developed,and composition and detection principle of the calibrator were introduced.The calibrator uses collection function of analog signals integrated by microprocessor ADuC834,which makes the hardware circuit simplest.Through calculation of ADuC834 internal software, temperature and humidity values can be directly read,and the data are transmitted to a computer so as to facilitate the work of calibration.The results of test for the calibrator showed that the temperature measurement error is less than ±0.1 ℃ and humidity measurement error is less than ±3%RH,which achieves actual needs and enhances working efficiency.
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Key words:
- environmental test box /
- calibrator /
- temperature measurement /
- humidity measurement /
- portable /
- ADuC834
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