阐述了各类考勤机的工作原理、优缺点和适用领域。
The paper also analyzes the composition of radio identification system, working principle and related communication technologies.
本文还提出了一种基于指纹特征识别身份设计电子考勤机的思路。
A thinking of designing the system which has identification function based on fingerprint feature is put forward.
同样道理，用金属或磁性物体遮挡考勤机和打卡头也会导致考勤机不能打卡工作。
In the same way, covering attendance machine and card reader with a metal or magnetic material will result in failure to work for the attendance machine.
型煤矿考勤管理系统是由矿灯，用考勤机及地面微机考勤管理系统组成的煤矿考勤系统。
YT - I type Mine automatic attendance system is composed of lamp, mine attendance machine and ground computer attendance management system.
文摘：YT-I型煤矿考勤管理系统是由矿灯、用考勤机及地面微机考勤管理系统组成的煤矿考勤系统。
Abstract: YT-I type Mine automatic attendance system is composed of miner's lamp, mine attendance machine and ground computer attendance management system.
本考勤机和外置的打卡头都是安装在墙壁上使用的，但是如果安装在金属墙壁或金属门上，将明显缩短打卡距离，甚至完全不能打卡。
Both the attendance machine and external card reader are mounted on the wall. A mental wall or gate will shorten greatly the distance to punch card, even make it unable to work.
本考勤机和外置的打卡头都是安装在墙壁上使用的，但是如果安装在金属墙壁或金属门上，将明显缩短打卡距离，甚至完全不能打卡。
Both the attendance machine and external card reader are mounted on the wall. A mental wall or gate will shorten greatly the distance to punch card, even make it unable to work.
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