Arc detecting device and aircraft equipped therewith
An arc detecting device includes a detector for acquiring time series data concerning a characteristic quantity, such as a voltage or a current in a circuit, targeted for detecting an arc; a basic data generator for generating basic data made of a plurality of frequency components, through frequency analysis from the acquired time series data; a data processor for statistically processing the generated basic data, thereby converting the basic data to an evaluation value highly correlative to an occurrence of the arc; and an arc judging unit for judging the occurrence of the arc, if the evaluation value exceeds a predetermined arc judgment threshold value. In this manner, the arc detecting device that is capable of effectively detecting the arc in a direct-current power supply circuit is provided.
1. An arc detecting device, comprising:
a time series data acquisition unit for acquiring time series data concerning at least one of a voltage or a current in a circuit, targeted for detecting an arc;
a basic data generator for generating basic data made of a plurality of frequency components, through frequency analysis from the acquired time series data;
a data processor for statistically processing the generated basic data, thereby converting the basic data to an evaluation value highly correlative to an occurrence of the arc; and
an arc judging unit for judging the occurrence of the arc, if the evaluation value exceeds a predetermined arc judgment threshold value,
wherein an unbiased variance is computed using time series data of power spectra and the Mahalanobis' distance is computed using the computed unbiased variance as a parameter.
2. The arc detecting device according to claim 1 , wherein the evaluation value is a Mahalanobis' distance obtained by computing a degree of variance of power spectra according to the plurality of frequency components as an evaluation parameter.
3. The arc detecting device according to claim 2 , further comprising a tripping unit for tripping the circuit if the arc judging unit judges that an arc occurs.
4. An aircraft, comprising the arc detecting device according to claim 3 .
5. An aircraft, comprising the arc detecting device according to claim 2 .
6. The arc detecting device according to claim 1 , further comprising a tripping unit for tripping the circuit if the arc judging unit judges that an arc occurs.
7. An aircraft, comprising the arc detecting device according to claim 6 .
8. An aircraft, comprising the arc detecting device according to claim 1 .