The technical parameters,composition and overall arrangement of the air-conditioning and ventilation system for 200 km/h track inspection cars are described,and the new technologies applied in the system are mainly explained.

Bridge and trestle crane rail inspection system;

Development of single-rail robot for crane rail inspection

A single-rail inspection robot is developed according to the work condition of bridge and trestle cranes rail.

Compared with traditional monitoring system, a new method of acceleration measurement was used for more accurate estimation of vibration source, so the accuracy and reliability of track detection were raised.

An introduction is given to the importance of track detection and maintenance technology in keeping the evenness of tracks, advanta ges and disadvantages of current track detection technology in China and develop ment trend, and scope and method of detection.

The main design principles,technical parameters and structure of the 200 km/h track inspection cars are described.

In this paper, according to the current railway engineering maintenance and management model and the inspection car condition, synthesized the track inspection data of three mainline in recent years, a management information system based on type GJ-4 track inspection car (TIC-MIS) was developed.