基于ADμC812温度补偿系统的压力变送器  

Temperature and Pressure Compensation System of Pressure Transducer Based on ADμC812

作　　者：刘志宏[1] 齐小民 邱礼鑫[3] 温维敏 

机构地区：[1]西北工业大学,陕西西安710072 [2]西门子信号有限公司,陕西西安710016 [3]河南省濮阳市中原油田,河南濮阳457001

出　　处：《电声技术》2012年第2期29-32,共4页Audio Engineering

摘　　要：基于ADμC812微处理器,建立了稳压补偿数学模型,从而使压力随温度的变化呈线性关系。测试结果表明,用一种软件数据处理算法代替传统的硬件补偿校正电路,具有输出线性良好、节省成本的优点,同时,整个系统具有结构简单、操作简单、输出精度高的优点;静态输出电流精度控制在5‰以内,达到国家统一仪表准确度一级标准。该种数学模型的建立方法可适用于声学系统的超声波传感器的数据拟合,实现超声波传感器在不同的应用环境下满足测距及其他测量的测量精度。The pressure is presented nonlinear variation because pressure transducer is affected by temperature. So this system is took full advantage of ADμCS12 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 ultrosonie sensor.

关 键 词：ADΜC812 ADC 数字滤波器 温压补偿 U/I转换器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]