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基于STC89C52的数字式温度计

= a thermometer based on STC89c52 MCU using RTD-PT100 thermistor

设计要求:
1.设计并制作一个数字温度计,温度传感器选用的热敏电阻。
  2.基本要求:
实验中,用所实现的数字温度计测量室温和杯内水的温度,并用给定的数字温度表做校验标准,调整和检验所设计的温度计的测量误差。要求测量的温度范围为0~80℃时,显示精度为0.1℃,测量误差不大于1℃。

要求分析:
1.数字式温度计的主要功能要求是对被测温度实现测量功能,具体思路是将温度变化转变为其他易测模拟量的变化,我们这里选用较为稳定易于放大和测量的电压模拟量,将温度变换转变电压差。
2.温度计的性能指标要求误差在1℃以内,同时显示精度为0.1℃。考虑到侧温范围为0~80℃,相比1℃跨度较大,因此容易出现非线性的误差,所以要对电压和温度的对应关系进行一定处理,我们采用线性拟合的方法。
具体详见word文档
包含完整的设计及测试

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