A distributed signal amplification sensor is designed and fabricated in this study for real-time detection of the distribution state of voltage signals in the fuel cell plane. The sensor employs a multilayer rigid laminated structure PCB technology to realize the functions of segment current collection, current conduction, and real-time signal amplification. The sensor has the features of realizing instant amplification of distributed signals in the fuel cell plane, shortening the signal transmission distance in the circuit, and avoiding transmission loss and interference. At the same time, the PCB design process avoids the buried resistance process, controls cost, and considers maintainability, increasing the feasibility of practical engineering applications. The total resistance of the measuring circuit of all zones remains unchanged in theory. In this study, a measurement system for calibrating PCB sensors was established, and all segment circuits in the plane were measured according to the theoretical value of the working current of the single-cell during normal operation. The segment current is loaded gradually from low to high. Therefore, the measurement accuracy of segment circuits can be determined respectively.
Keywords Polymer electrolyte membrane, Printed circuit board, Distributed signal amplification sensor, Segment circuit calibration, Measurement accuracy