摘要：A metal plate cooling model for 400~ single concentrator solar cells was established. The effects of the thickness and the radius of the metal plate, and the air environment on the temperature of the solar cells were analyzed in detail. It is shown that the temperature of the solar cells decreased sharply at the beginning, with the increase in the thickness of the metal plate, and then changed more smoothly. When the radius of the metal plate was 4 cm and the thickness increased to 2 mm or thicker, the temperature of the solar cell basically stabilized at about 53℃. Increasing the radius of the metal plate and the convective transfer coefficient made the temperature of the solar cell decrease remarkably. The effects of A1 and Cu as the metal plate material on cooling were analyzed contrastively, and demonstrated the superiority of A1 material for the cooling system. Furthermore, considering cost reduction, space holding and the stress of the system, we optimized the structural design of the metal plate. The simulated results can be referred to the design of the structure for the metal plate. Finally, a method to devise the structure of the metal plate for single concentrator solar cells was given.

摘要：教学活动中常用的"浮力产生原因"演示实验教具是使学生直接观察橡皮膜的形变程度来揭示浮力产生的原因,但存在设计不足、演示现象不显著等问题.笔者自制"浮力产生原因"演示仪,将橡皮膜的形变程度转换为U形管压强计两侧液柱高度差,从而更显著地揭示浮力产生的原因.

摘要：利用非平衡电桥法设计热敏电阻温度计是很适合于培养学生创新能力的物理类设计性实验。本文从理论分析了电路中的参数对温度计的温度特性的影响,研究发现,当选择R1=R2,不仅电路简单,当其阻值选择热敏电阻所处的低温点阻值和高温点阻值的平均值附近时,在测温范围为20~80℃时,其电桥的输出电流与温度的线性较好,并利用实验对其进行了验证。

摘要：本文利用PASCO平台的传感器及数据采集设备对传统单缝衍射实验设备进行改造,使单缝衍射的光强分布等不易观察的物理量得到感官表现,并能通过软件进行定量分析,具有良好的实验教学效果。

摘要：由电流型非平衡电桥改装的热敏电阻温度计,微安表内阻值的大小对实验能否设计成功起到至关重要的作用。电源设计电压随微安表内阻值的增加线性增大,导致热敏电阻两端加载的最大电压线性增大。当选用量程为300微安的表头时,如果其内阻值大于1600欧姆,按照改装原理得到的参数容易直接击穿热敏电阻。为了设计出高灵敏度且安全可靠的热敏电阻温度计,电路中各阻值应保持在同一数量级且相近,并确保微安表的内阻值远低于1600欧姆。在教学中,内阻在300欧姆以下的微安表是最可靠的。