Warm and humidity examination system with multichannel for storehouse
Abstract
The article discussed one kind storing in a storehouse which realizes based on the AT89C2051 monolithic integrated circuit with the multichannel warm humidity tour examination system, this measurement system simultaneously carries on the monitor to four groups temperatures and four groups humidities, after eight chooses multichannel analog switch 74HC4051 to elect to pass a group to carry on A/D transform, then will transform after the digital quantity to transport to microprocessor AT89C2051 in, again through by multi- positions LED keyboard or demonstration driver HD7279 constitution display circuit demonstration temperature and humidity, if the warehouse warm humidity ultra will limit, the microprocessor will cause the P1.4 to output the low level, will cause the alarm circuit report to the police. This is the temperature and the humidity carries on the measuring instrument for the commoity warehouse in which the effective tour examination designs. This measuring instrument has the examination precision high, the use simple, the cost lower and the work stable reliablely and so on the characteristic, therefore ,It has Widespread prospects.
Key word: Temperature measure; Humidity measure; Multichannel tour examination; microprocessor
