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Performed by: Rapoport Alexandra Instructor: Rivkin Eugene

Technion - Israel institute of technology department of Electrical Engineering. הטכניון - מכון טכנולוגי לישראל הפקולטה להנדסת חשמל. High speed digital systems laboratory. המעבדה למערכות ספרתיות מהירות. Data Acquisition for Biofeedback System Using LabVIEW. Performed by: Rapoport Alexandra

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Performed by: Rapoport Alexandra Instructor: Rivkin Eugene

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  1. Technion - Israel institute of technology department of Electrical Engineering הטכניון - מכון טכנולוגי לישראלהפקולטה להנדסת חשמל High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות Data Acquisition for Biofeedback System Using LabVIEW Performed by: Rapoport Alexandra Instructor: Rivkin Eugene Spring 2003 1

  2. High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות Abstract The project goal was to create a system for data acquisition during biofeedback training. The system was supposed to serve both the trainee and the physician, psychologist or other supervising person. The biological signals to measure are skin resistance (so called galvanic skin response) and skin temperature. Those signals were to be processed by LabVIEW application presenting them to the trainee and the supervisor in two different modes. As a result software part has been implemented, but the sensors were not wired but the full schematic drawing was made. 2

  3. High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות System description • LabVIEW application presenting the results of signal simulation on the screen according to chosen mode (trainee mode or supervisor mode). • The supervisor sees all the data as it is measured, i.e. four waveform charts, one for each sensor, presenting temperature or resistance separately for each body side. Supervisor mode allows also data processing settings such as measurement limits, current room temperature and so on. • Trainee mode consists of two multi-led indicators - one indicator for temperature and one indicator for resistance. 3

  4. High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות Hardware Specification • Two terminal IC temperature transducer AD590 • Voltage sources (5V batteries) • Low pass filter MAX291 – one for each side • Analog isolation amplifier HCPL7850 • Electrode • 3-terminal adjustable current source LM334 • Low Pass filter MAX291 • Analog switches MAX4654 • Analog isolation amplifier HCPL7850 • Voltage source (5V batteries) • PCI 6035E • Capacitors • Resistance 4

  5. High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות Software Specification LabVIEW 7.0 4

  6. LabVIEW interpretation: • Supervisor mode • Trainee mode Clock settings PCI 6035E 4x16 bit AC control 4 channels Two parts isolated Temperature to Voltage Resistance to Voltage High speed digital systems laboratory המעבדה למערכות ספרתיות מהירות System Block Diagram 5

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