摘要在生化分析仪中，温度控制系统的精度直接影响检测结果的准确度。本文针对小型生化分析仪对温度控制的要求设计了分离式的固体直热恒温系统。该系统设计的难点主要是反应液温度的均匀性和控制精度.本设计选择了反应盘与反应杯分离的机械结构，使反应杯在反应槽中旋转,得到很好的温度均匀性。同时在单片机中利用 PID 组合算法进行编程，使反应液温度控制在 37℃,其准确度为 ±0。3℃，波动范围±0。1 摄氏度，满足了小型生化分析仪对温控系统的要求。关键词:小型生化分析仪、温度控制、铂电阻测温电路、自适应 PIDABSTRACTIn the biochemical analyzer, the precision of temperature control system directly affects the accuracy of test results. According to the requirements of the temperature control system in small biochemical analyzer， this dissertation designs a separate thermostat system with solid directly heating 。 The main difficulties of this system are the accuracy and uniformity of the reactive liquid temperature 。 In order to obtain high level uniformity, the mechanical structure separates the plates and cups and the cups circle on the groove of the plates。 At the same time the microcontroller is programmed using PID combination algorithm。 The temperature of reactive solution was 37 ℃ and the accuracy is ± 0.3 ℃ with fluctuation range of ± 0.1 degrees Celsius. This design meets the requirements of temperature control system in small biochemical analyzer.Keywords ： Biochemical analyzer ， Temperature control ， Platinum Resistance Temperature Sensor， Adaptive PID。目 录第 1 章 引言.........................................................11.1 课题背景 ...................................................... 1 1 。 2 生化分析仪主要温控方式 ....................................... 1 1.3 温度传感器种类及工作方式 ...................................... 2 1.4 国内外讨论现状 ................................................ 3 1 。...
