设计了一种由单片机控制的无线发射与接收的非接触式的火车接近报警系统。
Designed a wireless non-contacting alarm system of closing train, and its Launching and receiving is controlled by MCU.
以语音方式发出列车接近报警信息，通知桥梁或隧道中的工作人员注意和避让，保护人员和设备的安全。
Via speech sound, it was alarmed train approaching, noticed the men working in brige or tunnel to be careful and keep away fron track, protected the safety of men and device.
低电量焦虑指手机电量接近20%报警值时，人们会变得恐慌和焦躁的状况。
Low battery anxiety describes the condition where people get panicked and annoyed when your phone's battery is dangerously close to the 20 percent mark.
“低电量焦虑”指手机电量接近20%报警值时人们会变得恐慌和焦躁的状况。
'Low battery Anxiety 'describes the condition where people get panicked and annoyed when your phone's battery is dangerously close to the 20 percent mark.
当有人非法接近门或窗时，它能立即发出报警声警告入侵者离开及提醒主人。
When someone close to doors or Windows illegal, it can immediately send warning voice warning intruders left and remind owners.
“低电量焦虑”指手机电量接近20%报警值时人们会变得恐慌和焦躁的状况。
'Low battery Anxiety' describes the condition where people get panicked and annoyed when your phone's battery is dangerously close to the 20 percent mark.
该报警器配用相应的标准保安探头，可以实现防开启、防接近、防玻璃破碎、防火灾等全面的保安功能。
This alarm is equipped with standard security probe which can perform several secure functions, including the prevention of turning, approaching, breaking of glass, and the prevention of fire.
针对远方列车信号很小，且具有很强的噪声，直接通过时域分析误差较大，因此，采取频域分析方法，获取列车接近时的警报信号的规律，以用于便携式列车接近安全报警系统中。
So by means of the frequency-domain analysis, the character of alarming signal can be deduced and used in the system of portable safety alarming system of train approaching.
针对远方列车信号很小，且具有很强的噪声，直接通过时域分析误差较大，因此，采取频域分析方法，获取列车接近时的警报信号的规律，以用于便携式列车接近安全报警系统中。
So by means of the frequency-domain analysis, the character of alarming signal can be deduced and used in the system of portable safety alarming system of train approaching.
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