A Novel Lubrication Oil Pressure Measuring Method Based on Magnetoelastic Effect for Auto Engines

AbstractA measuring method that uses Fe-based amorphous alloy was studied to achieve accurate measurement of the lubrication oil pressure of auto engines. First, a magnetoelastic inductance pressure sensor was designed. Its operating principle, structure, output characteristics, and major parameters were discussed. Second, the static characteristics of the sensor as well as its temperature, excitation circuit intensity, and influence on output frequency were analyzed through an experiment. Results show that the sensor is stable and reliable at high temperatures, and it has a simple structure. It can efficiently measure the lubrication oil pressure of auto engines.