| In order to solve the real-time monitoring and fault diagnosis problems of the liquid presses equipments, development of on-line oil monitoring system is becoming very important in the area of condition monitoring. Based on the analysis of oil monitoring technology background systemically, the dissertation introduces development of on-line monitoring instrument and its engineering application, outlines the necessity of this instrument and decides research contents.This topic pass to relevant the oil liquid pollute control theories and oil liquid to pollute the research that the on-line monitor equip and analyze, filter specially made a film to be used as a sensitive component to used for the monitor system of this oil liquid pollution, with the constant discharge press bad method for technique principle, monitored the processing hardware of system and signal to carry on choice and design to the on-line oil liquid.The thesis controls theories and oil liquid to pollute on-line monitor device to carry on study and analyzes to the oil liquid pollution, put forward to press a diagraph method of differ the method according to the constant discharge and measure under assurance the circumstance that constant discharge settle some at that time oil liquid inside the segment pass to filter a film creation of press to differ indirectly measure the pollution of an oil liquid; And make sure the oil liquid pollution on-line monitor system of total design project, on-line to oil liquid pollution monitored the work principle of system to carry on treatise, carried on a design and choose a type to the main component.This text collects the virtual instrument and the data to combine together and designed with the LabVIEW to the pressure signal to carry on a data to collect an analytical mark to settle system. Introduced conjecture instrument of development and it outstanding characteristics. Finally all the work of this dissertation is summarized and the future research work is prospected.
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