在智能交通工程实践中，需要计算立杆和摄像机的安装位置，需要知道焦距、物距等参数，根据公式计算出工程实践中的位置，提供算法思路和VBA实现。-Intelligent traffic engineering practice, need to calculate the position of the pole and camera installation, you need to know the focal length, object distance and other parameters, calculate the location of the project according to the formula in practice, provide ideas and VBA algorithm implementation.