Fig. 1. Schematic of the photoelectric sunshine recorder

Fig. 2. Composition of the photoelectric sunshine recorder indoor test system

Fig. 3. Spectral distribution curve of solar simulator

Fig. 4. Calculation of flux in the exit of integrating sphere

Fig. 5. Calculation model of radiation flux

Fig. 6. Transfer of radiant energy between surfaces

Fig. 7. Simulation results of radiation flux on the test surface at different distances when r=0.1m

Fig. 8. Direct solar radiation simulation device test

Fig. 9. Schematic diagram of scattered irradiance test location

Fig. 10. Stray schematic of stray light test position of solar simulator