The Study In Alarm System Of Railway's Project Affairs Operation

For the safe defence of railway's project affairs operation, a safe alarm used in safe defence of construction when the train approaching is designed in this paper.The system need not install other defence sections in addition, but deposited on the construction spot. The safety of on-line constructors could be well guaranteed.The hardware of this system includes the total-monitor controller, sensor, sound-and-optic alarm device. It has many characteristics of high sensitivity and great reliability and so on. It also has strong functions of self-checking and phonetic alarm. There are a lot of ways to realize the alarm when the train approach, and sound alarm is used in this device, when the sensor receives the train-approaching signal, the controller will analyze and handle the signal of coming train by the direction of coming train, and make an alarm signal of up or down traveling train approaching.The key of this task is how could we get the orderliness of train traveling signal. There are some introduction to the analyse ways of train's approaching signal. It emphasizes on the analyse of using syntony demodulation technology to final the long-distance coming train. At the same time, it gives a preliminary analyse in the signal for different cases, takes a research on the identified technology for the coming train, designs and assembles the hardware and software of this system. All of them have got past the test on the spot and got a satisfying result...