In the first part, the paper presents a classification of the in pipe inspection robots and the features of the mechanisms used in the design of the pipe inspection robots with adaptable structure. The authors’ contribution to the development of three wheeled minirobots with two four bar mechanisms placed on two parallel planes, is presented is the second part of the paper.

In-pipe inspection robots have proven useful in examining the inside of pipes without affecting their structure, therefore, the interest in researching these robots has constantly increased over time. There are many different types of inspection robots, but the most commonly used are the wall pressed type. This paper proposes a review of the wall pressed type inspection robots in terms of adapting mechanisms. By adapting mechanism is meant a simple linkage or a combination of linkages, with an active or passive force generation system used to adapt the robot to variations in pipe diameter. The characteristics of the different adaptation mechanisms are compared and analyzed regarding the type of linkages used, how the pressure force on the pipe wall is obtained, and the possibility of ensuring the movement through inclined or vertical pipes with elbows and branches.

In this paper the authors are pr directional mobile robot, developed for educat purposes. The omni-directional motion capab are due to its special Mecanum wheels. Th general information about Mecanum omni-d mechanical design aspects of the wheels and th describes the kinematic and dynamic models o control system.

In the first part of the paper, specific aspects concerning the omnidirecional Mecanum wheels are presented, while the second part is dedicated to the presentation of two prototypes of omnidirectional robots, equipped with omnidirectional Swedish wheels.

Inspection and exploration represent a challenging domain in the field of robotics because of the hazardous and limited workspace to which the robots have to adapt and because of the reduced ability to monitor and acquire data about the inspected environment. A pipeline inspection robot must ensure sufficient traction force to pull its tether cable and other equipment while travelling inside a pipeline to complete inspection, maintenance, and repair tasks. This paper presents the design of three minirobots with adaptable structure for in pipe inspection and the experimental determination of their traction force. To measure the traction force of the minirobots, the Xplorer GLX digital measuring device was used.