微型低功耗数据记录仪设计

摘要

In this paper , a miniature low-power data logger is designed .The logger takes fixed-point DSP ( digital signal processor ) TMS320VC5509A as the core, and it has the capabilities of signal amplification , programmable filtering , data acquisition and storage .Under the application conditions of supplying power by battery and small in-stallation space , the logger may achieve the large-capacity storage of measurement data .With the small size of less than 8 square centimeters, it may realize the data sampling and storage for as many as 800kSPS.In addition, the o-verall power consumption is less than 800mW.The data storage medium applies ordinary SDHC card with storage format FAT32, and data can be read out by a USB port supporting protocol 2.0.The test results show that the sys-tem may work steadily in the recording mode of the black box for a long time .%为了在电池供电且安装空间狭小的使用条件下，实现对测量数据的大容量存储，设计研制了一款微型低功耗数据记录仪．该记录仪以定点DSP（digital signal processor）TMS320VC5509A为核心，具备信号放大、程控滤波、数据采集和存储功能．该记录仪以不到8 cm2的小尺寸，实现了最高800 kSPS的数据采样及存储，且整体功耗小于800 mW．数据存储介质采用普通SDHC卡，存储格式为FAT32，读出方式为USB口，且支持2．0协议．测试结果表明，该系统可以长时间稳定工作于黑匣子记录模式．