When resonance happens,the induced voltage will reach to its maximum value.Tracking the maximum value can realize the frequency autotracking.
谐振时，感应电压达到最大值，搜寻感应电压最大值就能实现频率自动跟
。
When resonance happens,the induced voltage will reach to its maximum value.Tracking the maximum value can realize the frequency autotracking.
谐振时，感应电压达到最大值，搜寻感应电压最大值就能实现频率自动跟。
APPLICATION：The machine is applied to automatic package for granuliform pieces or compound film ice-lolly or liquid.
本机采用目前国际上最先进的微电脑芯
，光电眼自动检测跟，确保两包内准确
切。
In this paper,one X-ray image autotrack system for weld radiographic inspection is introduced, and itsworking principle is described from the hardware and software.
介绍了一种焊缝X光图象自动识别跟
。该用于焊缝的射线检测。从硬件和软件两个方面描述了的工作原理。
It also has the functions: taring , zero tracking, auto shut-off, units changeable and so on .The Portable Electronic Scale will be an ideal next-generation weighing tool.
具有去皮、零点跟、自动关机、单位置换等功能，是理想的新一代称量产品。
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