With the traditional design methods, the short-time and long-interval special robots are often too heavy to be adapted to the working environment.

The cable robot developed in this paper is the first application of special robots to cables of ca- ble- stayed bridges.

The new method eliminates the past traditional way, which simply relies on the experience, developing a short-time and long-interval special robot, and shortening the development cycle.

Application of PLC on cable robot monitoring control system;

When a cable robot climbs, the composition of main moving parts are two conical clamping bodies and sprocket chuck, and two conical clamping bodies have the role of orientation.

This paper introduced an intelligent groping robot based on the apperceived action pattern and LEGO Robot designed by Massachusetts Institute of Technology It could automatically advance and backpedal,swerve and remove from materials It has the ability of studying under the central of human being.

Therefore, the design research of coal mine search robot is of practical significance in enhancing the ability to meet the emergency, reducing the number of death and making right strategies.

The multi-section crawler-type underground coal mine search robot is proposed due to the unstructured and extreme environment after coal mine accidents.