Laser & Optoelectronics Progress, Volume. 54, Issue 10, 101202(2017)
Study and Design of Ultraviolet Energy Meter with Low Power Consumption
In order to solve the problems of large power consumption, high cost, low precision and complicated design in the traditional ultraviolet energy meter, a micro-power ultraviolet energy detection scheme based on current-integration with dual-compensation mechanism is proposed. The micro-power microcontroller is used to calculate the ultraviolet energy. The output current of the ultraviolet detector is converted into square wave pulse by the current integration module. The discharge compensation circuit and ambient light compensation circuit are adopted to correct the deviation of the current integration module and improve the detection accuracy. The main controller counts the number of pulses and calculates the energy. The system makes full use of low-power mode to optimize the display program, and the display program is driven by the main controller without driver chip, which further reduces the display power consumption. Experimental results show that the power consumption of this program is less than 165 μW, and the deviation of the ultraviolet energy value is less than 1%. The system with low circuit complexity and low cost of chip has the advantages of strong durability and high practical value.
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Wang Jun, Han Li, Du Bojun, Yang Huiling, He Xin. Study and Design of Ultraviolet Energy Meter with Low Power Consumption[J]. Laser & Optoelectronics Progress, 2017, 54(10): 101202
Category: Instrumentation, Measurement and Metrology
Received: Apr. 17, 2017
Accepted: --
Published Online: Oct. 9, 2017
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