基于双指数模型的温度补偿系统设计  

Design of temperature compensation system based on double exponential model

作　　者：刘一兵 李荣宽[1] 沈泓翔 LIU Yi-bing;LI Rong-kuan;SHEN Hong-xiang(School of Electronic Engineering, University of Electronic Science and Technology, Chengdu 611730, China)

机构地区：[1]电子科技大学电子工程学院,四川成都611730

出　　处：《传感器与微系统》2018年第6期96-99,共4页Transducer and Microsystem Technologies

摘　　要：针对现有温度补偿技术算法复杂,不易集成到芯片的局限性,设计了一种基于双指数函数模型的温度补偿系统,采用交替迭代法计算双指数模型系数,并使用数字定点化技术和扩展收敛域的坐标旋转数字计算(CORDIC)算法计算指数函数,通过硬件描述语言对该模型进行建模。仿真和实验表明:设计的双指数函数模型能够达到高阶多项式拟合精度,将零位温漂减少1个数量级,提高了零偏稳定性;采用硬件描述语言设计的数字补偿电路模块将补偿系统集成到微机电系统(MEMS)加速度计中的设计方法具有模块设计简单,工程使用价值强的特点。A temperature compensation system based on double exponential function model is presented aiming at limitations that algorithm of current temperature compensation technology is complicated and it is bard to integrated to chip. The coefficients of the model are calculated by alternating iteration method and the exponential function is calculated by the CORDIC algorithm with extended convergence domain and digital fixed-point technique,which is modeled by hardware description language. Simulation and experiment result shows that the drift decreases by an order of magnitude after compensation by the double exponential function model which can also achieve precision of high-order polynomial fitting. As the hardware description language is used to design the digital compensation circuit module,the design is relatively simple and the compensation technology is easier to be integrated into the MEMS accelerometer,it has good application value in engineering.

关 键 词：微机电系统加速度计 温度补偿 双指数函数 坐标旋转数字计算算法 硬件描述语言 

分 类 号：TN212.1[电子电信—物理电子学]