着重讨论了单片机系统、样品箱恒温电路、样品位置检测电路和步进电机控制电路的设计。
The design of the single chip system, sample box thermostat circuit, sample position detecting circuit and step motor control circuit are discussed.
而实际上，在试验方案设计和试验开展中，还有两个方面常常被忽略，即温度箱风速、样品的摆放。
Actually, in experimental design and running, there are two aspects are often neglected, that the temperature box wind speed and sample placed.
本文通过试验分析了温度箱风速、样品的摆放对产品的影响，并分别给出相应规避策略。
In this paper, we carry out tests, analysis the influence of the temperature boxes wind speed and the samples placed, and give the corresponding avoidance strategy.
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