Abstract：
For solve not concentrating by air conditioner system cupboard humidity too high problem not electric, adopt each by one-chip computer as machine , the PC not the next as at humidity control system not automatic, location of machine, the system adopts the distributed control method, the host computer chooses the IBM-PC machine, the host computer realizes centralized management, finish every from machine modification , humidity of person who establish , to give an order from plane mainly, check from the state of the machine , receive from the machine data and carry on statistical analysis, show that types and analyses the curve , report form ,etc.. Expand by one-chip computer from machine by 89C51, it finish collection and treatment , humidity of data , output person who control , show , report to the police , and host computer communication ,etc. function. Collection, humidity of signal whether humidity that made up of HS1101 and TLC556 measure circuit is it finish to come, made up of 8255A and LED display and show the circuit separately , finish showing the work.
Keywords : distributed control；A/D0809 ; single chip microcomputer
