基于μC/OS-Ⅱ的数据采集模块设计

Design of Data Acquisition Module Based on μC/OS-Ⅱ

摘要:

针对车载装备上传感器数据采集模块的体积小、可靠性高、实时性好等需求,设计了基于嵌入式实时操作系统μC/OS-Ⅱ的数据采集模块,选用集成了ADC与CAN通信功能等多种外设的Cortex-M3内核芯片STM32F107VCT6,移植嵌入式操作系统以简化软件设计,提高实时性和可靠性；数据采集模块将采集到的数据通过CAN总线实时地发送到主控计算机,同时也通过FatFs文件系统存储在SD卡中,便于计算机读取其中数据,进行离线分析；电路优化设计和数字滤波算法,提高了数据采集模块抗干扰能力和采样精度；通过实验验证,该数据采集模块可以准确、及时地获取和发送传感器数据,具有较高的可靠性和实时性。

Abstract:

Aimed at the needs of the data acquisition module for sensors on-board, such as small volume, high reliability, good real-time performance, a data acquisition module is designed based on the embedded real-time operating system μC/OS-Ⅱ. The Cortex-M3 core chip-STM32F107VCT6 with ADC, CAN communication and other peripherals is selected and the embedded real-time operating system is adopted to simply the design of software and improve reliability, good real-time performance. The data acquisition module can send the acquired data to the master computer by CAN bus and store them in the SD card via FatFs file system at the same time, which makes it easy for PC to read and process the data off-line. The anti-jamming capability and sampling precision are improved by optimizing the circuit design and the use of digital filtering algorithms. By experimental verification, the data acquisition module can acquire and send the sensor data accurately and timely, with high reliability and real-time performance.