Abstract
To measure engine vibrations, an additional accelerometer must be installed. However, selecting the measurement position is difficult to and requires additional cost. In contrast, the knock sensor is a sensor that detects the knocking of the engine. It has a piezo resistor, which is inserted in the knock sensor, that can turn these vibrations into voltage. In this study, we measured engine vibrations by using the knock sensor. The acceleration sensor and the knock sensor were simultaneously mounted and used to measure the engine vibrations. The measured signals were compared via signal processing to investigate whether the knock sensor can be a possible alternative to the accelerometer for engine vibration measurement.
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