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

2. Abstract המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 2 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.

3. System description המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 3 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.

4. Hardware Specification המעבדה למערכות ספרתיות מהירות High speed digital systems laboratory 4  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  Two terminal IC temperature transducer AD590  Voltage sources (5V batteries)  Low pass filter MAX291 – one for each side  Analog isolation amplifier HCPL7850

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

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