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目前业内普遍使用的直读式海流计功耗大，连续工作时间短，且无数据存储功能，可靠性不高，在需长时间进行海洋观测使用时十分不便。针对这一情况，为提高直读式海流计的可靠性，以AVR单片机ATmega8为核心处理器，基于水下分机输出脉冲信号形式，采用中断计数的基本原理，重新设计开发了一种低功耗高可靠的海流计数据采集系统。样机测试结果表明：该系统操作简单、性能稳定，可长时间在水下连续可靠工作，完全满足各种海洋作业中海流测量需求。“,”Since the common used direct reading current meter has the disadvantages of high-power consumption,short con-tinuous working time,low reliability and no storage function,a new current meter data acquisition system with low-power con-sumption and high reliability was designed on the basis of basic principle of the counting interrupt to improve the reliability of the direct reading current meter. The AVR microcomputer ATmega8 is adopted as kernel processor in the data acquisition sys-tem. The pulse signal form of underwater part is utilized in the system design. The testing results of prototype machine show that the system features easy operation,stable performance and low cost,and can work continuously for a long time under water. It can fully meet the requirements of various current measurements.