Fig. 2. a. Schematic of the top and side view of the SP with four wired piezoresistors. The geometric parameters varied in simulations are given in framed boxes. b. Schematic of the Wheatstone bridge with piezoresistors (R1, R2, R3, R4) and the corresponding nodes for the excitation voltage (U+, U-) and the output signal (M+, M-). c. Photograph of SP with longitudinal piezoresistors connected to a PCB for characterization.
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