Tunnel lighting analysis is much more complicated than road lighting. Lighting institutions and professional lighting manufacturers in many developed countries have developed lighting-specific software. Some lighting manufacturers in China's joint venture foreign brands have also introduced imported software that is only suitable for their own brands. The domestic road and tunnel lighting field has just started. Some design and research institutes have also done research and development work, and compiled simple road lighting software, but basically did not involve tunnel lighting to promote the development of domestic road and tunnel lighting technology.
Its successful development will be widely used in lighting design and lighting distribution research. System Design Overview Road and tunnel lighting analysis system software was developed to solve complex, time-consuming lighting calculation problems. In order to make the software efficient, flexible and practical, in the system design, arbitrary lighting calculation and arbitrary shape tunnel wall reflection calculation are taken as the primary goal. The structural design method is used to determine each functional module in the system software. The main technical measures adopted The system software development always follows the normative, easy-to-use and efficient design principles, and adopts the following main technical measures. The user interface is very friendly with a combination of drop-down menu and toolbar buttons, parameter input and execution of the separate operation mode.
The parameter data of different lighting calculations are managed by means of project files, which makes the calculation analysis fast and orderly. For the fitting of tunnel wall surface equations, the spline function descriptions of different points are selected to make the surface equation easy to use and smooth enough. . In order to ensure that the wall surface equation can always be established smoothly, the tunnel high axis is used as the independent variable and the wide direction axis is used as the dependent variable. In order to make the application of the software not limited by the type of lighting and road pavement, a plug-and-play data interface is designed in terms of software expansion functions. Starting from the analysis and utilization of the convenient lighting calculation results, the calculation results are saved in the disk file in code text mode, and the printer can be immediately browsed and sent on the screen.
In the calculation of light distribution and road reflection characteristics involving luminaire equipment, it is inevitable to encounter table lookup and interpolation calculation. In order to ensure a high calculation accuracy, the interpolation of the stain table is unfolded on the cylinder surface. 汕, the interpolation of the dirty bucket is spread on the plane, and the binary nine-point interpolation is used except for the boundary condition, and the difference is considered depending on the insertion point. Select the appropriate nine node values. Smooth fitting of the tunnel wall equation. The surface equation of the tunnel wall is fitted with a spline function, and a point-selectable interpolation spline is provided in the software to describe a smooth spatial surface when the direction is a straight line, so that different shapes of the tunnel wall can use the input spline. A simple method of points reliably performs wall reflection calculations. The calculation accuracy of the tunnel wall reflection is guaranteed.
The size and number of bins in the tunnel wall calculation directly affect the calculation accuracy and the calculation workload. The software has already undergone a lot of iterative calculation, analysis and experiment, and finally determines them, so the accuracy of the reflection calculation can be guaranteed. The calculation speed is fast. This refers to the speed improvement achieved by software design techniques, such as optimization of various algorithms, optimization of data processing, including optimization of table lookup, indexing, etc. This means that as long as different illuminator standard light distribution data is provided, that is, specified, the light distribution data can be input through the system data interface, and the illumination analysis for various light distribution lamps can be performed, and the light source type is allowed to be inserted and used. High-pressure or low-pressure sodium lamps, high-pressure mercury lamps, fluorescent lamps, etc., can be used to convert light distribution data.
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