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本文介绍了利用MCS—51系列单片机实现的粮库温湿度自动检测系统的工作原理和设计方法,这是一个性能价格比较高的系统。在该系统中,几十个温度(还可以扩展到上百个)传感器都是用灵敏度高价格低廉的热敏电阻,用软件克服了这种传感器的线性度和温定性差的缺点。通过一定工作量的计算和数据处理,将对湿度的检测转化为对温度的检测,从而简化了电路,过一步降低了成本。由于本系统采取了一系列软件抗干扰措施,故实现可靠运行。
This article describes the use of MCS-51 series MCU temperature and humidity automatic detection system works and design principles, which is a relatively high performance-price system. In the system, dozens of temperature (can be extended to hundreds) sensors are high sensitivity and low cost thermistor, the software overcomes the shortcomings of the linearity of the sensor and poor temperature stability. Through a certain amount of workload calculation and data processing, the detection of humidity into the temperature of the test, thus simplifying the circuit, one step lower costs. As the system has taken a series of software anti-jamming measures, it is to achieve reliable operation.