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High-speed trains and high-speed trains have made outstanding contributions to the development of human society, but they have also brought shocking damage. In recent years, with the rapid development of rail transit, the speed of high-speed trains and high-speed trains has increased, and train accidents have occurred frequently. Therefore, Bisha Technology has independently developed a distance detection system that can obtain road and train information at any time and promptly remind train drivers to take measures to avoid danger, which has become one of the important methods to solve rail transit safety problems.

1. Based on active RFID and GPS satellite navigation technology to realize the mutual communication between trains, by reporting the accurate geographic information of the vehicle to the forward and backward vehicles, and obtaining the geographic information sent by the vehicles before and after, the current train has a failure, power outage or When the train stops due to other problems, the tag on the train will actively send out a signal, and the reader on the next moving train will receive the signal within the effective distance, and the moving train will take the initiative to stop. Real-time calculation and acquisition of vehicle distance to avoid the occurrence of malignancy.

2. The overall design of the system

1). The front of each train is equipped with a reader/writer for Bisha products, and the RFID+GPS active tags for Bisha products are installed at the rear of the train. First obtain the vehicle information (train serial number, latitude and longitude information, speed and other related information) through the RFID tag installed at the rear of the previous train (carrying GPS satellite navigation technology), and then send it to the next train through the radio frequency channel (installed on the train) High-power reader at the front of the car).
When the first train fails, the RFID active tag carried will automatically generate an RFID signal. When the next train receives the signal, the train will actively stop the train, and the train can be effectively managed and supervised in real time. The train runs safely.

2) The hardware needed for this system:

GPS+RFID active electronic tag

Features:
With parameter configuration function, the label can switch between work and sleep mode;
Configuration function, standard RF sending interval is 2 seconds/time, users can adjust the sending interval according to actual needs
2.45GHz, the universal ISM frequency band
Read 100 tags per second, and can manage 2000 tags in the field at the same time

3), background management operating system

RFID active high-power reader
The reader plays a pivotal role in the RFID system.
High reading rate, high stability;
The radio frequency module and the control software part of the reader have a high degree of consistency;
It can read multiple tags at the same time in the reading and writing area, with anti-collision function;
Interface mode: support multiple interface modes, RS232/485, lan, WI-FI, ZIGBEE, GPRS

LED liquid crystal display system:

It can display related information such as the front and rear surrounding vehicles, the minimum distance between vehicles, and the latitude and longitude of the vehicle.

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