The data acquisition subsystem based on AT89C51 acquires multichannel acoustic signal synchronistically and stores digital signals in the Shared memory.
基于单片机at89c51的数据采集子系统完成对多路声信号的同步采集，并把数字信号保存到片外共享存储器中。
By using this technique, the baseline of transmitting acceleration data in real time is adjusted, and the velocity and the displacement are integrated synchronistically.
利用此套技术可对实时传输的加速度记录同步进行长周期基线校正、积分求速度及积分求位移。
Geometric accuracy and semblance quality were required seriously during grinding outer ring raceway and rib of bearing synchronistically, common corindon grinding wheel was not very effective.
轴承外滚道及挡边同步磨削时几何精度和外观质量要求高，普通刚玉类砂轮加工效果不好。
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