Dynamic Injection Molding Signal Conditioner Design Based on STM32
A dynamic injection signal conditioner based on STM32 chip and UCOSⅢ operating system was designed.The DDS chip AD9833 and the digital potentiometer MCP41010 were used to implement the generation and amplitude modulation of pressure(P)/flow(Q)signals.The adder composed of operational amplifier OP07 was used to implement the synthesis of P/Q vibration signal and P/Q static signal.Based on RS485 interface and Modbus communication protocol,real-time communication between dynamic injection molding signal conditioner and host computer was implemented.Based on the emWin graphic library,the human-computer interaction interface was designed,and the selected injection parameters can be set on the touch screen.Ex-perimental tests show that the dynamic injection molding signal conditioner can output P/Q dynamic injection signals with differ-ent waveforms,frequencies and amplitudes in different processes according to the communication information fed back by the host computer,which can be used for dynamic injection molding and meet the needs of pump-controlled hydraulic excitation systems.
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