Capacitive oil sensor line

Currently online oil pollution sensor is still in trial stage theory , the use of capacitive measurement method, ie detection software support, integrated by measuring the change in dielectric constant of oil to determine the extent of contaminated oil . Its working principle is: the oil as a dielectric , as new oil, and the oil 's dielectric constant is different when the oil change will cause a change in Crankcase Position Sensor via C / V conversion put this slight change frequency demodulation of the DC signal, the data acquisition circuit samples pre- amplification , A / D converter , sent to the microcontroller after the class consisting of hardware and software data processing system . System based on test data, analysis calculated determination of various types of oil pollution in the upper and lower threshold level target value by including algorithms for intelligent analysis and processing procedures , by the LCD Monitor Report User quantitative ( pollution index value ) and qualitative ( well, available , scrapped ) test results. Because the causes of oil pollution and environmental factors more complex , so the principle of Engine Water Temperature Sensor in the production practice has not been very good application. For example : As the engine piston blow-by , the delay of fuel injection causes the exhaust gas treatment system of exhaust gas into the cylinder , or a leak in the high pressure common rail diesel standard 2 contaminated oil, will cause the viscosity of the oil drop , but the oil dielectric no effect on dielectric constant and density .