科研之友
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摘要
Illuminance is the total amount of incident light impinging on a unit area,and its size depends on the luminous intensity of the light source and the distance between the illuminated object and the light source. Proper illumination can improve work efficiency and have a positive impact on people. This article describes the design principle and implementation method of a multi-channel illuminometer for signal detection. The illuminometer uses STM32 as a microcontroller and uses TSL2561 chips to achieve photoelectric conversion and analog-to-digital conversion. Multiple TSL2561 and STM32 connections are implemented using the TCA9548A chip. Utilize W5500 Ethernet module to realize the communication between STM32 and upper computer. Data processing further improves measurement efficiency and reduces measurement errors. The actual test results show that after calibration by data fitting,the measurement error of the illuminometer is within 8%,which can meet the actual measurement requirements,have the advantages of low cost,high efficiency and reliable performance,and can meet the needs of rapid measurement of multi-channel light intensity in engineering applications.
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