Design of Piezoelectric Acceleration Sensor for Automobile Applications

Abstract

In this study, piezoelectric based compressive type accelerometer has been de-signed by using PZT-5A ceramics with bellewasher type spring. FEA analysis were carried out by using COMSOL. According to COMSOL simulation, reso-nance frequency is nearly 42500 Hz. Sensitivity of the designed sensors were measured and compared each other. Frequency spectrum was between 100Hz-10 kHz. The effects of piezodisk thickness, stiffness of the spring and seismic mass on the sensitivity of the designed sensor were investigated. Voltage output is in-creasing from 4.1 mV/g to 12.7 mV/g while seismic mass is raised from 3 gr to 10 gr. Linearity depending on the frequency of the designed accelerometer was dis-torted above 5.5 kHz like commercial accelerometer. In addition, real-time tests were performed using a calibrated accelerometer and a designed accelerometer on the internal combustion engine and drivetrain. Vibration profiles were carried out randomly. According to the results obtained here, it is observed that all the peaks were matched with a coefficient about 1.3.

A Novel Engine Vibration Measurement System based on the MEMS Sensor

“…Acceleration sensors can detect motion, vibration, impact and shock. detects and measures acceleration caused by causes [4]. Today, acceleration sensors are used for many purposes, such as improving safety and driving characteristics [5].…”

“…Today, acceleration sensors are used for many purposes, such as improving safety and driving characteristics [5]. In the literature, it is seen that a piezoelectric acceleration sensor designed to measure vibrations in the engine and transmission and the signals of an accelerometer produced for commercial purposes are compared [4]. In another study, in which the effects of fuel and oil used in the engine on vibrations were examined, it was observed that the vibrations that occurred during the tests were analysed with two 3-axis accelerometers placed on the crankshaft main bearings [6].…”