一种新型高精度传感器可拓展型测试系统的数字化设计  

A Digital Design of a New Test System for Extensible Type of High Precision Sensor

作　　者：周少帅 亓岳岩 董钧港 张会新[1] ZHOU Shaoshuai;Qi Yueyan;DONG Jungang;ZHANG Huixin(National Key Laboratory of Electronic Testing Technology,Central North University,Taiyuan Shanxi 030051,China;Beijing Aerospace Systems Engineering Institute,Beijing 100076,China;Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]北京宇航系统工程研究所,北京100076 [3]北京强度环境研究所,北京100076

出　　处：《电子器件》2021年第2期295-299,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金杰出青年基金项目(61525107)。

摘　　要：随着传感器及测量技术的不断突破,目前测试行业希望通过增加压力测点来挖掘更多的信息,而不仅仅对某个点的测量,传统压力传感器及采编系统体积和重量大,难以测量更多的压力测点,采集通道少,采集精度低,已经不能适应新的需求。根据功能指标要求与任务设计要求,提出了一种新型高精度传感器测试系统的数字化设计方案。设计了以24位隔离膜式数字压力敏感头89BSD为压力敏感元件,以I2C总线扩展芯片P82B715构成通信驱动电路。采用具有单路传输数据功能的MAX3490芯片作为变换器的RS-422接口芯片。结合上位机软件进行数据的分析处理并显示结果,系统测试的数据结果表明,设计采用MEMS技术与集成电路结合的数字压力传感器,提高了采编系统测量的精度。根据实验测试结果计算出飞行器的姿态,对机器人运动控制、无人驾驶、深空探测有重要的参考价值。With the continuous breakthrough of sensor and measurement technology, the testing industry hopes to excavate more information by increasing pressure measuring points rather than just measuring a certain point. It is difficult to measure more pressure measuring points with traditional pressure sensors and acquisition systems. Meanwhile, it has less acquisition channels and low acquisition accuracy, which fails to adapt new demands. The digital design scheme of a new high precision sensor test system is proposed according to the requirements of function index and task design, and the 24-bit isolation film digital pressure sensitive head 89 BSD is designed as the pressure sensitive element. The communication drive circuit is constructed by P82 B715 I2 C bus expansion chip. The MAX3490 chip with single transmission data function is used as the RS-422 interface chip of the converter. Combined with the upper computer software, the data is analyzed and the results is displayed. The data results of the system test show that the design of the digital pressure sensor combined with MEMS technology and integrated circuit improves the accuracy of the measurement of the acquisition system. It has important reference value for robot motion control, unmanned driving and deep space exploration.

关 键 词：数字压力传感器 I2C总线扩展 数字采集 FPGA 通信协议 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]