The invention discloses a method for intelligently regulating and controlling a negative pressure isolation hood based on multi-
modal filtering, relates to the technical field of medical protection equipment, and solves the problems of sudden
pollution response
lag, filter
screen failure protection interruption and poor man-
machine adaptability caused by
single parameter regulation and control of a traditional isolation hood. Isomerous data inside and outside the hood are synchronously collected through a multi-mode sensing unit; inputting the data into a dynamic
decision model, fusing an environment
safety coefficient, a filtering efficiency
attenuation curve and a user comfort
evaluation function, and generating an optimal negative
pressure threshold in real time; the power of a stepless
frequency conversion fan is adaptively adjusted, the
lower limit of negative pressure is maintained to be higher than-25 Pa when the
aerosol concentration suddenly increases, the fluctuation amplitude is controlled when
breathing is abnormal, the service life is predicted according to the
pressure difference change rate of a filter screen, and the power is compensated in advance; and parameters are controlled through a closed-loop feedback mechanism, fault diagnosis is started, and a standby strategy is switched. The method is used for prevention and control of infectious diseases, can improve the sudden
pollution response speed, prolongs the service life of the filter screen, and remarkably improves the wearing comfort.