基于LPC1788的放射性气溶胶样品制备机控制系统设计

LPC1788 is a single chip microcomputer based on the kernel of ARM Cortex-M3. Based on its features like high integration, low power consumption and facility for industrial control, this paper designs a control system for radioactive aerosol producing machine with LPC1788 serving as the core control unit. This system accesses and automatically disconnects peripheral electrical equipment by receiving sensor data and controlling relay module. This system also controls the motion of 7 stepper motors by means of pulse width modulation(PWM) and at the same time, RS232 serial interfaces are applied to receive PC instructions. Since the radioactive aerosol producing machine mentioned in this paper is considered a subsystem of the entire sampling, analyzing and detecting system for atmosphere of radioactive aerosol, a specialized communications protocol is agreed and designed to ensure the communication and information transmission between PC and this control system. Experiment has proved that this system can successfully receive PC instructions and complete the operation about aerosols sample producing.