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Laboratory Project 3: Model of Tissue Impedance |
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Laboratory Notebook Contents and Grading |
1270
30 Communication
4 Work recorded in notebook (rather than pasted in)
8 Complete information: task descriptions, diagrams, data, reproducible one year later
4 Written in Ink
4 Student Signed every page
4 Student Dated every page
6 TA Signature for every lab session (-3 each session missed)
32 IV. Wein-Bridge Oscillator
C. Procedure
8 1) Balanced bridge equation (derive Equation (1) relating R, L, and C values)
8 2) Frequency of oscillation (derive expression for ω0)
6 3) Compute value of R1 for ω0 = 2π(25 kHz) (list value of R1)
2 4) Construct Wein-bridge circuit (schematic and comments about construction)
4 5) Measure Wein-bridge circuit output with no load (Matlab® plot of v0)
4 Table II filled in with measured values
18 V. Tissue Impedance Measurement
C. Procedure
8 1) Derive formulas for Rt and Cc as function of V0 and V1
4 2) Measure values of v0 and v1 (Matlab® plot)
2 3) Measured value of electrode surface area, A, and separation, d
2 4) Calculated values of V0 and V1 from measured v0 and v1
2 5) Calculated values of Rt and Cc
15 VI. Tissue Parameters and Published Tissue Data
A. Procedure for Calculation of Conductivity, Relative Permeability, and Power
3 1) Calculated value of σ
3 Calculated value of εr
3 Calculated value of S
B. Procedure for Comparison of Measured and Published Values
4 1) Table III filled in with measured values
2 2) Comment on safety of S versus published FDA limit
5 Conclusion
5 Comment on shortcomings/possible improvements of the lab exercise