Temperature and Pressure Compensation System of Pressure Transducer Based on ADμC812

The pressure is presented nonlinear variation because pressure transducer is affected by temperature.So this system is took full advantage of ADμC812 MCU hardware resource,at the same time,C51 is used,made used of strong data processing,established temperature and pressure compensation math model through software arithmetic,Sequentially,it takes on linear variation with temperature change along with pressure change.As a result,passed through testing,precision of static output current is controlled within 5‰,achieved nation I level standard of instrument accuracy.The traditional hardware measure system is substituted by the software data processing in the paper is described.The advantage of this method have favorable linear output,lower cost,at the same time,The advantages of the system are:simpleness of the hardware structure,flexible applicability,high measure precision excellence etc.The measure can be applied in linear processing of ultrosonic sensor..