Research on the Regulation Control Technology of LED Light Source Based on BUCK Constant-current Circuit
To effectively improve the measurement accuracy of aerosol lidar(ALD),a set of simulated light source needs to be designed to calibrate the receiver system of ALD.In this paper,a high-accuracy and low-power regulation control technique was proposed,which integrates a BUCK circuit and an embed-ded control system for regulating the calibration light source of ALD.First,the control system of the LED light source and the control circuit structure of the LED constant current driver were designed;secondly,the proportional-integral-derivative(PID)autotuning algorithm for the LED operating current was de-signed,according to relay feedback control and the Ziegler-Nichols(Z-N)method;finally,the control circuit was experimentally verified to exhibit low-power and high-accuracy characteristics.
万方数据
维普
