电阻式传感器转换电路研究与分析  

Research and analysis of resistive sensor conversion circuit

作　　者：王程远 Wang Chengyuan(School of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学自动化与电子工程学院,青岛266061

出　　处：《电子测量技术》2021年第8期161-167,共7页Electronic Measurement Technology

摘　　要：针对现有电阻式传感器转换电路的设计多采用桥式电路,其电路结构复杂的问题,提出了在一定应用场景中可以用极简化电路替代桥式电路的设计思想。通过对这两类电路比较仿真,指出在微处理器性能、模数转换电路分辨率不断提高的情况下,极简化电路也可以满足大多数场景的应用,从而使原材料成本在满足功能性能经济需求的情况下,向更低极限推进。在此基础上,提出了极简化电路定值电阻的最优器件选型方法。最后,以实际蓝牙体温计项目进行开发设计。经测试数据表明,测温误差≤0.1℃,满足国家标准的要求。In view of the problem that the existing resistive sensor conversion circuit design mostly adopts the bridge circuit and its circuit structure is complicated,the design idea that the bridge circuit can be replaced with a very simplified circuit in certain application scenarios is proposed.By comparing and emulating these two types of circuits,it is pointed out that extremely simplified circuits can also meet the application of most scenarios with the continuous improvement of microprocessor performance and analog-to-digital conversion circuit resolution.So that the cost of raw materials can meet the requirements of functional performance.Then,push to a lower limit under the circumstances.On this basis,an optimal device selection method for extremely simplified circuit of fixed-value resistors is proposed.Finally,the actual bluetooth thermometer project is used for development and design.The test data shows that the temperature measurement error is less than or equal to 0.1℃,which meets the requirements of national standards.

关 键 词：电阻式传感器 转换电路 极简化电路 桥式电路 研究分析 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]