Study On Saury Fish Lamp Light Field Based On Spherical Light Source

Saury fishing is one of the main species of ocean-going fishing. Side lift net fishing is the main mode of production saury, side mesh nets to mention simple structure, efficient operation, high yield saury fishing, so rapid promotion; Fish is a part of a very important saury fishing, fish lamp and collection boxes can make good use of fish, related to fishing success or failure directly affects the production efficiency and economic benefits of fishing vessels. Saury is a highly migratory fish phototaxis, saury phototaxis and its influencing factors is the midpoint we need to study, We like to combine saury range of illumination to develop fish lamp and set the ratio of fish boxes and assumptions. The main problem of the optical properties of fish lamp is herein to be studied, according to fish lamp and set of optical physical properties of fish boxes, The basic theory research methods by photometry and common illumination calculations: Lambert cosine law, the principle of superposition of illumination, optical distance law, the three-dimensional coordinate space ship boxes arranged according to the actual situation of the autumn fishing knife, Calculation combination of spherical micro-element method for finding the area set the brightness of fish lamp, The planar illumination light to produce a calculated point, The eventual establishment of saury boat half plane illuminance distribution model side, In what should be a right angle and the right distance set to take fish boxes, as well as fish lamp disposed within the box should be how to analyze and study.Through two illumination experiments: Plane illuminance measurements at different angles of a single box and a flat illuminance measurements and more boxes of different combinations, use of these two experimentally derived data on actual illumination model is modified, Methods of obtaining data fitting fitting factor models, determined by the modified model of illuminance and luminance values and then the actual measured values of variance test, P> 0.05, Illuminance values obtained from the model and the actual measurement value after the correction there was no significant difference. That the model can be modified to meet our needs. The use of the modified model, by Matlab software for visual analysis of plane illuminance distribution of saury half side of the ship, Provide a theoretical basis for the rational allocation of fish aggregating fish lamp and light box.The results are as follows:（1）Attenuation trends and colors Lightbox plane illumination lamp is not directly related. It depends on the angle assumptions boxes. Illuminance trends at different angles is not the same, decay rate S_45°> SS_60°> S_75°（2） 45 ° planar light field fluctuations, illuminance decreases rapidly, near the hull around the luminance value is larger, but the short distance irradiation, it is not conducive to trap fish; Planar light field of 60 ° formed more stable less volatile, illumination decay is relatively slow, smaller hull near ambient illuminance values, but the irradiation distance, in favor of fish traps; 75 °, the small plane illuminance values, indicating reflection and refraction and other factors resulted in a greater loss of energy, energy efficiency is not high; so when is a 60 ° angle suitable ideal.（3） Two planar light field and the formation of three boxes weak illuminance line bit sparse, not a good trap saury; The four groups and five groups capable of forming a strong box flat light field, illumination and other bit lines are also very dense, can play a stabilizing role for saury well, From the energy conservation point of view, in order to maximize the collection of fish also play a role in reducing costs, so a combination of the selected set of four fish boxes for the best.（4） Autumn fishing knife constructed utilizing a half tank of plane illuminance distribution model, combining phototaxis mechanism saury, fishing in order to reduce costs, reduce energy waste, improve the efficiency of fishing, try to avoid mutual interference between the boats, programmed to calculate and determine the optimal angle boxes erected for 66 °, the angle is too large or too small is not conducive to a better fish trap is very stable.