公开(公告)号：US06585938B1

公开(公告)日：2003-07-01

申请号：US09630120

申请日：2000-08-01

申请人： Kyoichi Machida ,  Nobuyuki Ohta ,  Katsunori Makino ,  Hayao Karasaki

发明人： Kyoichi Machida ,  Nobuyuki Ohta ,  Katsunori Makino ,  Hayao Karasaki

IPC分类号： G01N2700

CPC分类号： G01N27/221 ,  G01N33/2841

摘要： There is provided a gas concentration-detecting device for detecting the concentration of gas in oil, which is capable of detecting the concentration of gas in oil with accuracy, irrespective of the temperature of oil, and even when oil is degraded. The gas concentration-detecting device includes two electrodes for being arranged in the oil such that the electrodes are opposed to each other and spaced from each other by a predetermined distance, and a capacitance amplifier for outputting a signal indicative of a concentration of gas in oil, the signal being dependent on a capacitance between the electrodes. The predetermined distance between the electrodes is set to a value equal to or larger than a predetermined value at which an amount of drift of the signal output from the capacitance amplifier dependent on variation in a temperature of the oil starts to gradually decrease as the distance between the electrodes is increased.

摘要翻译： 提供了一种用于检测油中气体浓度的气体浓度检测装置，其能够精确地检测油中气体的浓度，而与油的温度无关，甚至是油劣化时。 气体浓度检测装置包括两个用于布置在油中的电极，使得电极彼此相对并且彼此间隔预定距离;以及电容放大器，用于输出指示油中气体浓度的信号 信号取决于电极之间的电容。 电极之间的预定距离被设定为等于或大于预定值的值，在该值下，依赖于油的温度变化的从电容放大器输出的信号的漂移量开始逐渐减小， 电极增加。