Non-contact measurement of torque in rotational truck flywheel using resistance strain gauges based on wireless telemetry system

Torque is an important parameter that determines the rotational characteristics of a flywheel. Installing a signal transmission and power supply device equipped with sensors on a rotational flywheel presents challenges due to the limited space behind the engine crankshaft. To overcome these problems, this study proposes an approach to measure flywheel torque using strain gauges and a wireless telemetry system based on induction. Eight double-shear strain gauges are attached to both the front and back of the modified flywheel significantly simplifying the complex problems associated with torque measurement and signal transmission. We developed a model for analysing torque waveforms to verify the reliability of road test data across various test cycles. The torque characteristics of the flywheel were analysed at different rotational speeds. During vehicle operation, the torque measurement error margin of this sensor was less than 2.57%. This study demonstrates that using resistance strain gauges with a telemetry system for measuring flywheel torque is reliable and enhances the understanding of the mechanical performance of the flywheel.