| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problems associated with conventional technique that, for monitoring a characteristic frequency in space, it is necessary for a person to perform initial setting because each region has a different characteristic frequency, and also it is possible to obtain erroneous detection because sometimes the characteristic frequency suddenly disappears, for example, a broadcast is stopped when monitoring a frequency of a broadcast wave or a communication wave as the characteristic frequency, and for generating the characteristic frequency from the exterior, it is impossible for a standing device to generate the characteristic frequency because it is necessary for a person to generate the characteristic frequency. <P>SOLUTION: For determining whether an antenna is normally working or not, it can be determined based on a frequency level which decreases in a broadband when an antenna cable is disconnected. Thus, an electric apparatus insulation diagnostic device comprises determination means which monitors a frequency level in a broadband and compares the frequency level with reference data (threshold) which is measured in advance to determine that, when the frequency level is equal to or less than a determination level, abnormality occurs in a reception antenna of the electric apparatus insulation diagnostic device. <P>COPYRIGHT: (C)2013,JPO&INPIT |
