激光与光电子学进展, 2017, 54 (10): 101202, 网络出版: 2017-10-09
低功耗紫外光能量计的研究与设计
Study and Design of Ultraviolet Energy Meter with Low Power Consumption
测量 光能量检测 低功耗 双补偿 高精度 measurement energy detection low-power consumption dual-compensation high accuracy
摘要
为解决传统紫外光能量计所存在的功耗大、成本高、精度低以及设计复杂等问题, 提出一种基于双补偿机制的电流积分型低功耗紫外能量检测方案。该方案利用低功耗单片机实现对紫外光能量的计算; 紫外光电探测器输出的电流通过电流积分模块转换为方波脉冲; 放电补偿电路和环境光补偿电路对电流积分模块进行误差校正, 提高检测精度; 主控制器对脉冲数进行统计, 计算能量大小; 充分利用低功耗模式优化显示程序, 显示程序不使用芯片驱动, 而是采用微处理器直接驱动, 使显示程序的功耗进一步降低。实验证明: 该方案功耗不超过165 μW, 对紫外光能量值的检测误差小于1%, 电路复杂度低, 使用芯片成本低, 具有很强的续航能力和很高的实用价值。
Abstract
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.
王军, 韩力, 杜博军, 杨会玲, 何昕. 低功耗紫外光能量计的研究与设计[J]. 激光与光电子学进展, 2017, 54(10): 101202. 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.