Rail traffic

The German train technology series, the Canadian train technology series, the French train technology series and other rail transit technologies represent the world's advanced level, and China's rail transit technology has basically reached the world's advanced level through the introduction and development of rail transit technology in recent years. However, the key traction control technology is still based on foreign products.

Since the construction of the Shanghai Line 1 and Guangzhou Line 1 subways in the 1990s, China's urban rail transit construction has widely adopted the latest technologies and equipment of various countries, and has built a city rail transit system with world-class technology. However, rail transit technology is still in the stage of introduction, digestion, absorption and innovation.

Before the 1990s, all countries in the world used a steel-speed DC motor system with switching resistors or a stepless chopper voltage regulator DC motor system with power electronic control. In 1990, after the emergence of switched off thyristors(GTO) and insulated gate transistors(IGBTs) components, developed country subways began to use AC drive systems for direct-AC frequency conversion and variable-voltage speed AC Motors. Since the 1990s, all new subway lines, monorail lines, and light rail lines have adopted the IGBT module AC drive system except for the Shanghai Line 1 subway. Compared with direct circulation vehicles, the power consumption can be reduced by 40 %; Due to the use of regenerative braking, the amount of brake tiles is reduced by more than half; The wheel wear is small, and the wheel replacement cycle is extended; The work of AC motor maintenance is very small.

Subway Type A vehicles(3m/3 .2 meters wide) and Type B vehicles(2.8 meters wide) are all fully used in the world. This bogie has the advantages of simple structure, few parts, light weight, and low maintenance workload. The bogie adopts two suspension shock absorbers, one adopts a metal rubber laminate structure, the second adopts an air spring, and has a highly automatic adjustment valve. Through exhaust and air supply, the height of the floor surface of the vehicle is automatically adjusted to match the platform surface.. The bogies of all different types of vehicles such as subway type A vehicles, type B vehicles, linear electric locomotives, monorails, and low-floor light rail vehicles are all produced in China.

Description of the programme:

Integrated Railway Turnout Monitoring System, which can measure the switching resistance of turnouts on the spot, monitor real-time and synchronous, indicate the gap image of the turnouts, and collect the vibration acceleration of the turnouts bearing large vibration force on the spot in real time to achieve real-time monitoring of the full-dynamic process images of multiple parameters. To fully control the actual state of operation of the turnouts and to give early warning of changing trends and anomalies.

Power supply:

The AC-DC product output bus 24VDC voltage is used for the backend system load. The system load mainly includes the main control chip, transceiver and memory, etc.. The required voltage is provided by the DC-DC module or power converter such as LDO. Ensure the stability of the power supply voltage and the reliable operation of the system.

Programme characteristics:

After the system is applied to the field, its unique gap image and field resistance real-time synchronous monitoring function can control the actual state of the turnout in a more comprehensive and real-time manner, and warn the changing trends and anomalies of various parameters in advance. Overcome the real time and trend warning that can not be realized by regular inspection, greatly reduce the faults of turnstile equipment, improve the transportation efficiency, and ensure the safety of driving.