<div style="text-align:justify;"> Aiming at the problems of LED-based visible light positioning system such as unstable illumination, Lambertian model transmission limitation, large positioning error, ...<div style="text-align:justify;"> Aiming at the problems of LED-based visible light positioning system such as unstable illumination, Lambertian model transmission limitation, large positioning error, etc., it is proposed to use PWM to drive the LED, use the curve fitting method to obtain the ranging model, and estimate the target position according to the trilateral algorithm. A positioning system platform based on the microcontroller MiniSTM32 was built to test the performance of the transceiver circuit. The experimental results showed that the positioning error of less than 3 cm was achieved in a space of 80 cm × 80 cm × 80 cm. </div>展开更多
目的研制一台冷沉淀制备辅助装置,缩短冷沉淀制备的时间,保证冷沉淀中有效成分的活性。方法采用ALIENTEK Mini STM32单片机作为控制模块,采用步进电机作为执行模块,通过Keil编写开发板程序,五位按键控制四挡制备速度及正反转。结果将机...目的研制一台冷沉淀制备辅助装置,缩短冷沉淀制备的时间,保证冷沉淀中有效成分的活性。方法采用ALIENTEK Mini STM32单片机作为控制模块,采用步进电机作为执行模块,通过Keil编写开发板程序,五位按键控制四挡制备速度及正反转。结果将机械力作用于血袋管路,加速融化血浆排出,大大缩短冷沉淀制备时间。结论该装置改变只依靠虹吸原理制备的现状,解决了冷沉淀制备时间长的问题,保证制品的质量,操作简单,推广前景广阔。展开更多
文摘<div style="text-align:justify;"> Aiming at the problems of LED-based visible light positioning system such as unstable illumination, Lambertian model transmission limitation, large positioning error, etc., it is proposed to use PWM to drive the LED, use the curve fitting method to obtain the ranging model, and estimate the target position according to the trilateral algorithm. A positioning system platform based on the microcontroller MiniSTM32 was built to test the performance of the transceiver circuit. The experimental results showed that the positioning error of less than 3 cm was achieved in a space of 80 cm × 80 cm × 80 cm. </div>
文摘目的研制一台冷沉淀制备辅助装置,缩短冷沉淀制备的时间,保证冷沉淀中有效成分的活性。方法采用ALIENTEK Mini STM32单片机作为控制模块,采用步进电机作为执行模块,通过Keil编写开发板程序,五位按键控制四挡制备速度及正反转。结果将机械力作用于血袋管路,加速融化血浆排出,大大缩短冷沉淀制备时间。结论该装置改变只依靠虹吸原理制备的现状,解决了冷沉淀制备时间长的问题,保证制品的质量,操作简单,推广前景广阔。