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This paper describes the principles of the a.c. field measurement technique, a non‐contacting electromagnetic method of crack detection and sizing in metals. The development of the technique is covered, followed by examples of some of the many different applications the technique has been used for, including multi‐sensor arrays for rapid manual inspection or for deployment by robotic manipulator in hazardous environments. Finally, recent work on replacing the normal multi‐turn coil magnetic field sensors with newly available GMR sensors is discussed.

Presents both description and overview of the emerging field of biomechanical grippers and shows the prototype of biomechanical gripper called the Presov biomechanical robot gripper. Biomechanical robots and biomechanical grippers belong under biorobotics and bioengineering systems. Basic components of biorobotics include biomechanisms, biocontrol, biointelligence and biosensors. The Presov Biomechanical Robot Gripper is an electrically‐driven, multi‐fingered dextrous gripper, which has many features that conventional industrial robot grippers do not have. This gripper has been developed in the Department of Industrial Robotics of the Technical University in Presov, Slovak Republic.