Design And Research Of The Main Control System Of Virus Detector

In recent years,SARS,Ebola,avian influenza,African swine fever,COVID-19 and other new viruses have frequently occurred,posing a major threat to the safety of people’s lives and property.In order to detect the virus as soon as possible,prevent its further spread and develop reasonable treatment plans,virus detection equipment plays a crucial role.However,currently,domestic virus detection equipment in China generally faces problems such as low automation level,insufficient temperature control speed and accuracy.Therefore,based on the laboratory virus detection process,this article analyzes the shortcomings of the current fluorescent PCR detector and designs a virus detection instrument main control system with simple operation,higher temperature control speed and accuracy.The main research content is as follows.(1)In response to the current issue of low automation of the detector,a threedimensional liquid transfer platform is proposed to complete the liquid transfer operation.The control accuracy of the three-dimensional liquid transfer platform is improved from three aspects: device selection,circuit design,and software algorithm.Especially in terms of algorithm,optimization is made on the basis of the five segment S-type acceleration and deceleration algorithm,transforming the step acceleration in the original five segment S-type acceleration and deceleration algorithm into a continuous straight line,The experiment proves that the optimized algorithm improves the control accuracy of the motor.(2)In response to the problem of insufficient temperature control rate and accuracy in the current temperature control system of the detector,a semiconductor refrigeration chip is used as the heat source to increase the temperature rise and fall rate,and a hardware circuit is designed to cooperate with software algorithm design to improve the temperature control accuracy and response speed of the detector.Based on the traditional PID controller,this article introduces a variable step size Tianniu whisker search algorithm to seek the optimal solution.After changing the fixed step size to a variable step size,The algorithm quickly converges to approximate the global optimal value after searching for the optimal value.And conduct simulation verification in MATLAB.The simulation results show that the response of the Tianniuxu algorithm is not very stable.The improved Tianniuxu algorithm has better stability and smaller overshoot.When the overshoot is similar,the optimization speed of the Tianniuxu algorithm is faster than that of the particle swarm optimization algorithm.Experiments have shown that the three-dimensional liquid transfer platform can improve the automation level of the detector and make the operation of the detector easier.The improved longicorn whisker algorithm can accelerate the response speed of the temperature control system.