A New Scheme of Sunshine Recorder with Integral Sphere Principle

A new scheme of sunshine recorder with integral sphere principle is put forward. The recorder consists of ring with diaphragms, integral sphere and photoelectric receptor. The integral sphere is a hollow regular sphere with five pores of needle. The pore of needle can resist scattered light throwing into the sphere, and direct solar radiation thrown into sphere is diffusely reflected through the internal wall for many tines, and then homogeneous distribution of the irradiance is formed. By means of comparing with the irradiance of sunshine threshold, there is sunshine or not to be determined. The sunshine recorder has some advantages, such as nonrotating parts, simple structure, unnecessary adjusting and easy operating