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Proceedings Paper

Hybrid control and acquisition system for distributed sensors for environmental monitoring
Author(s): Fabio Garufi; Fausto Acernese; Alfonso Boiano; Rosario De Rosa; Rocco Romano; Fabrizio Barone
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Paper Abstract

In this paper we describe the architecture and the performances of a hybrid modular acquisition and control system prototype we developed in Napoli for the implementation of geographycally distributed monitoring and control systems. The system, an improvement of a VME-UDP/IP based system developed by our group for interferometric detectors of gravitational waves, is based on a dual-channel 18-bit low noise ADC and 16-bit DAC module at 1 MHz, managed by an ALTERA FPGA, that can be used standalone or mounted as mezzanine (also in parallel with other modules) on a motherboard. Both the modules and the motherboard can send/receive the configuration and the acquired/correction data for control through a standard EPP parallel port to an external PC, where the real-time computation is performed. Experimental tests have demonstrated that this architeture allows the implementation of distributed control systems, using a standard laptop PC for the realtime computation, with delay time &Dgr;t < 30 &mgr;s on a single channel, that is a sustained sampling frequency fc > 30kHz. Each module is also equipped with a 20-bit slower ADC necessary for the acquisition of an external calibration signal. The system is now under extensive test in two different experiments, i.e. the control of a Michelson Interferometer to be used as Velocimeter for Seismic Waves in Geophysics and the control of the end mirrors a suspended Michelson Interferometer through electrostatic actuators, a prototype for mirror control for Interferometric Detectors of Gravitational Waves.

Paper Details

Date Published: 10 April 2007
PDF: 6 pages
Proc. SPIE 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007, 65301M (10 April 2007); doi: 10.1117/12.715364
Show Author Affiliations
Fabio Garufi, Univ. degli Studi di Napoli Federico II (Italy)
INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)
Fausto Acernese, Univ. degli Studi di Salerno (Italy)
INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)
Alfonso Boiano, INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)
Rosario De Rosa, Univ. degli Studi di Napoli Federico II (Italy)
INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)
Rocco Romano, Univ. degli Studi di Salerno (Italy)
INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)
Fabrizio Barone, Univ. degli Studi di Salerno (Italy)
INFN, Complesso Univ. di Monte S. Angelo Via Cintia (Italy)


Published in SPIE Proceedings Vol. 6530:
Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007
Kara J. Peters, Editor(s)

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