Biomedical Engineering > GATE 2022 > Blood Pressure Measurement
A catheter based arterial blood pressure measurement device uses a flexible diaphragm mounted with four identical strain gauges in a Wheatstone bridge configuration as shown in the figure. Assume that the strain gauges have a nominal resistance value of RG = 10 kΩ, Gauge Factor G = 40 and Young's Modulus E = 10 MPa. Blood pressure variations results in small finite change in strain ε (ε>0).
If Vo is the output voltage of the Wheatstone bridge and σ is the stress in MPa, the sensitivity Vo/σ is _______ V.MPa⁻¹.
If Vo is the output voltage of the Wheatstone bridge and σ is the stress in MPa, the sensitivity Vo/σ is _______ V.MPa⁻¹.
Correct : 8 to 8
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