研究目的
To design and evaluate an indoor light energy harvesting system using infrared LED array for powering wireless sensor networks.
研究成果
The designed prototype successfully converts light energy from tube lights and bulbs into electrical energy using an IR LED array, generating a maximum voltage of 32.1V and current of 19 μA. With the LTC 3588–1 IC, the current was amplified to 140 μA, resulting in a net power of 462 μW. This power is sufficient for low-power applications such as wireless sensor networks.
研究不足
The current obtained from the IR LED array is very low, leading to long charging times for batteries or supercapacitors. The system's efficiency is dependent on the distance from the light source and the number of IR LEDs used.
1：Experimental Design and Method Selection:
The design involves using an array of IR LEDs (transmitters and receivers) in series and parallel combinations to convert light energy into electrical energy. The system includes the use of LTC 3588–1 energy harvesting IC for voltage regulation and current amplification.
2：Sample Selection and Data Sources:
The system was tested under fluorescent tube lights, with measurements taken using a multimeter and digital signal oscilloscope (DSO).
3：List of Experimental Equipment and Materials:
IR LED array, LTC 3588–1 module, multimeter, DSO, supercapacitors, and capacitors of various ratings.
4：Experimental Procedures and Operational Workflow:
The IR LED array was placed at varying distances from the light source to measure output voltage and current. The LTC 3588–1 was used to amplify the current and regulate the voltage. The energy was stored in supercapacitors, and the charging process was monitored.
5：Data Analysis Methods:
Output voltage and current were measured directly. The charging time and voltage across capacitors were recorded and analyzed to determine the efficiency of the energy harvesting system.
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