LED背景光源反射棱镜的设计

The design of reflecting prisms with LED backlight

全站仪反射棱镜在暗环境中测量会影响照准精度,为了实现全站仪反射棱镜能够在暗环境中正常使用,对全站仪反射棱镜进行了改进.在反射棱镜中引入LED发光二极管作为背景光源的装置,并通过实验验证了这种装置的可行性.首先,介绍了反射棱镜的结构构造以及工作原理;然后说明了LED发光二极管的优势及改进装置电路的设计;最后,通过实验验证了这种改进装置应用的可行性,实验选择从温度、距离两方面检验该装置对测量工作是否产生影响.2次不同室温温度测试结果证明了该装置产生的温度不会对测量产生影响;距离测试结果证明该装置不会对距离测量产生影响.由以上实验结论证明了这种改进装置的可行性.

In order to realize the application of tachometer reflection prism in the dark environment, the improvement of electronic tachometer reflection prism has been carried out. LED light emitting diode was introduced into the reflection prism as the device of backlight, and the feasibility of this device was verified by experiments. Firstly, this paper introduced the structure as well as working principle of the reflection prism, and then explained the advantages of light emitting diode and the design of improved circuit diagram. Finally, it also verified the feasibility of this improved device through experimental results. The experiments had tested whether the device could affect the measurement or not from two aspects, temperature and distance. The results of the two different room temperature proved that the temperature of the device has no impact on the measurement while the results of distance tests also proved that the device would not influence the distance measurement. All the above conclusions have proved the feasibility of this device.