Wyniki wyszukiwania - BazTech

1

Comparison of acoustic, electric and laser contactless displacement measurements applied to observe nonlinear behaviour of diaphragm movement in dynamic loudspeakers

Kmiecik Michał, Pluta Marek J.

Vibrations in Physical Systems

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2023

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Vol. 34, nr 2

art. no. 2023203

EN

Dynamic loudspeakers introduce distortion into reproduced auditory signal, especially in case of operation with high power or low frequency. Assessment of distortion by measuring current of voice coil should allow to compensate or prevent the product of distortion. The paper contains a comparison of displacement capture by optical triangulation displacement sensor, acoustic signal acquired using microphone, voltage and current. In case of processing low frequency signals, acoustic signal captured by microphone is dominated by harmonics of the fundamental frequency, and the laser displacement sensor provides more accurate information about the diaphragm displacement. Harmonics recorded in current have the same character as the displacement signal for low frequency, but for frequencies above the resonance, acoustic signal is a better source of displacement information.

2

Układ sterowania serwonapędem elektropneumatycznym przy zastosowaniu laserowej metody pomiaru przemieszczenia

Woś P., Dindorf R., Mazur S.

Pomiary Automatyka Kontrola

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2013

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R. 59, nr 6

574--577

PL

W pracy przedstawiono układ regulacji liniowego serwonapędu elektropneumatycznego, w którym do pomiaru przemieszczenia użyto czujnika laserowego. Zastosowanie takiego czujnika umożliwia wykonanie pomiaru odległości metodą bezkontaktową. W opracowany systemie pomiarowym zastosowano adaptacyjny układ regulacji serwonapędu elektropneumatycznego. Przedstawiono wyniki badań porównawczych dotyczących jakości pozycjonowania przy zastosowaniu laserowej i magnetostrykcyjnej metody pomiaru przemieszczenia serwonapędu.

EN

The paper presents a control system for an electro-pneumatic servo-drive which was used to measure the displacement of a laser distance sensor. The use of this sensor allowed applying the non-contact measurement method. The aim of this study was to develop a measurement system for control of an electro-pneumatic servo-drive. The control system contains an adaptive controller. The paper also presents the results of the positioning quality when using a laser and a magnetostrictive sensor. Laser non-contact sensors are used to accurately measure the length and speed of movement of a device and to optimize the manufacturing process. In laser measuring techniques, there is no need for a continuous contact with the element measured. The basic element of the system is a pneumatic cylinder. This actuator is equipped with a magnetostrictive displacement sensor. Fixing of the magnetostrictive displacement sensor needs changes into the actuator construction. In the case of a pneumatic cylinder, installation of the measuring system is difficult and in many cases impossible. The mounting of the sensor can be a source of the measurement inaccuracy. The laser measurement system can be an alternative to the magneto-strictive method of measuring.

3

A concept of electro-pneumatic programmable manipulator

Kaszycki L.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2011

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nr 28 (100) z. 1

34-37

EN

The paper presents a concept of use the logical controller and typical pneumatic elements to construction of programmable manipulator. The construction, principle of action and properties of device were described. The paper contains also detailed functional schemes of system, as well as discussion of performed manipulator tests. Finally, the application area of described device was included.

PL

W artykule przedstawiono koncepcję wykorzystania sterownika logicznego oraz typowych elementów pneumatyki do budowy programowalnego manipulatora. Opisano budowę, zasady działania oraz właściwości urządzenia. Dołączono szczegółowe schematy funkcjonalne zbudowanego układu. Omówiono przeprowadzone testy manipulatora. Wskazano obszar zastosowań opisanego urządzenia.