Abstract
In this study, a light-driving bug zapper is presented for well controlling the diseases brought by insects, such as mosquitoes. In order to have the device efficient to trap the insect pests in off-grid areas, pulse width modulated light emitting diodes (PWM-LED) combined with a solar power module are proposed and implemented. With specific PWM electric signals to drive the LED, it is found that no matter what the ability of catching insects or the consumed power efficiency can be enhanced thus. It is demonstrated that 40% of the UV LED consumed power and 25.9% of the total load power consumption can be saved, and the trapped mosquitoes are about 250% increased when the PWM method is applied in the bug zapper experiments.
Highlights
In this study, a light-driving bug zapper is presented for well controlling the diseases brought by insects, such as mosquitoes
The Filariasis and West Nile virus are transmitted by Culex quinquefasciatus[1], the Japanese Encephalitis virus (J.E.V.) is transmitted by Culex annulus, and Dengue Fever and Zika virus[2,3] are transmitted by Aedes aegypti and/or Aedes albopictus
In order to test the mosquito attraction capability, the light-emitting diodes (LED) light types were changed to attract mosquitoes using different light distribution patterns, the 3 W UV LED light bar shown in Fig. 1a and which is mounted by a lens array shown in Fig. 1c were used in the bug zapper respectively
Summary
In order to test the mosquito attraction capability, the LED light types were changed to attract mosquitoes using different light distribution patterns, the 3 W UV LED light bar shown in Fig. 1a and which is mounted by a lens array shown in Fig. 1c were used in the bug zapper respectively. At frequencies higher than 512 Hz, the attraction of insects was even worse than that of the reference trapper These findings indicated that even when the power consumption of PWM-driven LEDs is 0.6 (0.919 W/1.536 W) times lower than that of the constant current driven LED, as shown, PWM LEDs still can outperform the latter in the ability to trap mosquitoes. LED increases, bug zapper trapping capability at 64 Hz decreases but remains the highest among other driving frequencies and the difference between driving frequencies in terms of the trapping capability becomes smaller These findings means that when PMM LED power consumption is increased to 1.5 W, LED duty cycle should be increased 1.8 times, which may result in longer LED conduction time and reduced light contrast ratio, so making the efficiency of the PWM driving mode and the linear current driving mode similar.
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