The laser interferometry systems have been developed for scientific studies, industrial operations, artworks investigation, etc. They present common generic elements, such as laser, optics, beam, polarization, splitting, interferometry, etc., but also diverse specific components and features,such as He-Ne or femtosecond laser, quantum cascade lasers, non-polarising beam splitter, collimating lens, high reflecting mirror, photodetector, attosecond pulse train, etc., as the case. The paper presents, also, a development on general structure and characteristics of laser interferometry systems. Analytical descriptors are introduced for the main implied entities, as well as some qualitative features referring to measurement object, coordinate system, lasers, laser beams, optics, output beams, detectors, environmental sensors and compensation modules, electronics, process software and computer, assembly, calibration, etc. The conclusions accord attention to further laser interferometry development regarding the interacting processes, analytical modelling, simulation, operational characteristics, etc.

The interferometer is widely used for various applications concerning high precision distance and position measurements, especially for the calibration of numerically controlled machines. While the setup procedures of the interferometer may be provided by the manufacturer, some calibration procedures are well defined by the international standards. Since the operation of interferometers requires qualified personnel, some helpful hints for the novice users are to be presented in this paper. Even if the interferometer is highly recommended by international calibration standards, some factors are prone to intervene into the quality of results. This paper presents the experimental results for the evaluation of positioning accuracy and repeatability on Y axis of two vertical machining centres. The results show the high importance of environmental conditions compensation, the impact of time pauses during the measurement procedure and the implications of the increment of measuring target positions.

Abstract This scientific work continues the ideas and research from a previous work and presents the progressive conceptions of the future from Mechatronics to Cyber-Mechatronics and from Mechatronics Systems Cyber-Mechatronics Systems, as they are presented at the moment. It also tries to mention the scientific and technological advances in the above mentioned fields, the new and complex innovative concepts of science and Mechatronics and Cyber-Mechatronics. Anticipating the future, the power and flexibility that will flow from the ability to “program” the world around us should influence every aspect of the human experience.

AbstractThe quality evaluation of the micro and nanostructured thin layers for biomedical applications, deposited on metallic substrates, by physical methods was the main objective of the research presented in this article. For this reason, micro and nanostructured TiN, TiO2 and CrN thin layers were deposited on CoCr and M30NW steel substrates by the Direct Current (DC) sputtering, High Power Impulse Magnetron Sputtering (HiPIMS) and cathodic arc methods. Nano-indentation tests were performed in order to establish the hardness and the elastic modulus of the TiN, TiO2 and CrN thin layers. It was observed that the highest values of the hardness and elastic modulus of TiO2 and CrN layers are obtained when the DC sputtering method is used for deposition. Cathodic arc method is the one that helps to obtain TiN layers with superior properties on both types of substrates and HiP sputtering can be used to obtain TiO2 and CrN layers with superior elastic modulus. Thus, the main conclusion of this study was that DC sputtering is the best method for deposition of biocompatible thin layers on metallic substrates. In the future, this method can be used for improving the quality and increasing the use period of biomedical components by thin layers deposition.KeywordsThin layersHardnessElastic modulus

AbstractThe SICOLET project is centered around a collaborative multi-agent system consisting of an ekranoplan, an unmanned aerial drone and a ground- based vehicle which is equipped with a mechanical manipulation device. All the agents are capable of a semi-autonomous operation, meaning, they can all be controlled manually via analog commands from the operator using a radio controller or by using a control algorithm, the operator giving the agents a set of instructions consisting of a set of waypoints and commands specific for every agent. Each agent is equipped with cameras, a wireless 5.8 GHz transmitter, a 2.4 GHz transceiver and a Raspberry Pi that allows localized image processing when the agent is unable to reach the command center via normal means of communication due to interferences from the environment. This paper focuses on the radio network and the algorithms that allow the agents to communicate with each other in the absence of a command signal from the command center. They are developed using Python and C++ programming languages.KeywordsRadio networkMulti-agent systemRF24L01+Override signal

AbstractIn this paper we present some considerations regarding the design, realization and testing of a modular, easy to use and reliable laser micro-processing system for high quality processing of various materials. The central part of micro-processing system is a 100 W pulsed fiber laser with 1064 nm wavelength. This system has been tested for cleaning and marking of different metallic and non-metallic materials. The experiments performed followed the analysis of the impact of a laser beam interaction, with selected operational parameters, on the quality of surfaces processing (cleaning or marking). The aim is to obtain sets of optimal parameters for different material processing in various applications.KeywordsLaser material processingLaser cleaningLaser markingFiber laserLaser parameters