Design and Development of Solar Multispectral Cum Electrified Mesh Insect Trapper with IoT-Based Ultrasonic Animal Repellent System

Key findings

• ▸Combining UV, blue, and white LED light (multi-spectral) trapped 32-45% more insects per night than any single-wavelength trap — an average of 465 insects/night combined vs 320 for UV alone, the next best performer.
• ▸The IoT-triggered ultrasonic repellent system reduced animal intrusion events by roughly 75%, from 10-12 per week down to 2-3, using passive infrared sensors that detect movement within 5-7 metres.
• ▸The entire system ran off a 40-50W solar panel and a 12V/20Ah battery, generating 160-180 Wh/day against 110-130 Wh/day of consumption, with 1-2 days of backup autonomy even on cloudy days.
• ▸At roughly ₹20,000 to build, the system had a benefit-cost ratio of 1.12 and paid for itself in about 15 months, covering 1-1.5 acres per unit.

Abstract

The insects, pest and intrusion of some wild animals become one of the major constraint in Indian agriculture, especially western arid and semi-arid region of Rajasthan. Traditionally, chemical application were practiced for pest control, which leads the production cost and severely effect on environment. The present study emphases on the design and development of solar powered multi spectral insect trapper with an electrified mesh cum IoT based ultrasonic animal repellent system which protect the crop and increases agricultural productivity. The developed system enables UV (365-395 nm), blue (450-470 nm), and white LEDs which attracts the crepuscular and nocturnal insects. The insects were deactivated by supplying low current in electrified mesh powered by a 40 W solar panel. Also, the ultrasonic sound waves (>20 kHz) were generated using two amplifiers to protect the agriculture field from wild animals. The efficiency of multi spectral light for insect trapping was in the range of 32-45% higher than a single spectrum light system, while animal intrusion in the agricultural field was significantly reduced around 70-80% by using the ultrasonic system. The IoT based sensors can easily judge the movement of animals within a radius of 4-5 m and transmit the signal to the ultrasonic system. This technology creates a new window for farmers for implementation in sustainable agriculture and smart farming systems.

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