Along with the development of biomedical engineering,negative pressure aspirator is more and more widely applied in clinical treatment and patients rescuing.The study of negative pressure aspirator is an important goal pursued in emergency treatment,because it can boost aid success.Given this need,this device based on MXT8051 single-chip is developed.The device can use Pulse Width Modulation（PWM）signal to drive the motor of negative pressure pump and it can adjust the motor’s speed through the Proportional Integral Derivative（PID）algorithm to realize the setting negative pressure rapidly,accurately and stably.The control requirement is accomplishedthrough the man-machine interface.This device has the advantage of simple operation,low cost and good practicability.
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