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Data Acquisition for Biofeedback System Using LabVIEW Characterization Presentation Performed by Rapoport Alexandra Supervised by Eugene Rivkin Technion Department of Electrical Engineering The High Speed Digital Systems Laboratory
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General Concepts of Biofeedback Used for training of self control. The emotional state of a person is determined according to physiological parameters such as skin resistance, skin temperature, EEG, pulse, etc. The response of the system is given by visual presentation.
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A/D Temperature and resistance detectors System Description Measurements to voltage transformation
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Detectors Temperature detectors – one for each side. Possible implementation – by temperature dependent variable resistance. Skin resistance detectors – one for each side. Possible implementation – by inducing alternating current through skin and voltage measurement.
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Medical Requirements Maximal current permitted - 5μA The detector part has to be isolated from the A/D and interpretation part
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Hardware Specifications A/D A/D card used: LabVIEW card PCI 6035E 12 channels (4 channels used) 16 bit each Voltage limits: -10..10V
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Software Specifications LabVIEW6 based interpretation
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System Structure LabVIEW interpretation PCI 6035E 4x16 bit 4 channels (of 12) Temperature to Voltage Resistance to Voltage Two parts isolated
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Physiological Issues Left and right side measurements differences. Time delays of parameters changing.
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Schedule 26.03.03 - Characterization presentation 03.04.03 – Learning LabVIEW and more more precise problem definition 10.04.03 - Software programming 23.04.03 – Hardware design 05.05.03 – Mid Semester Presentation
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