公开(公告)号：EP1053479A1

公开(公告)日：2000-11-22

申请号：EP97938382.5

申请日：1997-08-14

申请人： HENDRY MECHANICAL WORKS

发明人： PARKER, Michael, T. ,  HAM, Margaret, F. ,  KEENAN, James, J. ,  BENOIT, Luc, Pierre

IPC分类号： G01R31/08

CPC分类号： G01R23/18 ,  G01R29/0842

摘要： Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena with all essential information that signifies 'arc' contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs (22), where cross-induction among neighboring circuits is lower, and where travel between the arc and the arc signature pickup (23) is longer than at the high frequencies customary for arc detection. Fractal subset transformation reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths or treated as modulated carriers.

公开(公告)号：EP1004031A4

公开(公告)日：2004-10-27

申请号：EP98943182

申请日：1998-08-10

申请人： HENDRY MECHANICAL WORKS

发明人： PARKER MICHAEL T ,  HAM MARGARET F ,  KEENAN JAMES J ,  BENOIT LUC PIERRE

IPC分类号： G01R31/02 ,  B23K9/095 ,  G01R23/18 ,  G01R29/00 ,  G01R29/08 ,  H01T1/12 ,  H01T15/00 ,  G01R23/00 ,  G01R31/00 ,  H02H1/00

CPC分类号： G01R23/18 ,  G01R29/0842

摘要： Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena in that all essential information that signifies "arc" is contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset (16) of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs, where cross-induction among neighboring circuits is lower, and where travel between the arc (12) and the arc signature pickup (23) is longer than at the high frequencies customary for electric arc detection. Fractal subset transformation (17) reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths (242, 342) or treated as modulated carriers (42) for monitoring. Aircraft may be equipped with spark monitoring systems (80) that record (82-86) occurence of dangerous sparking at different locations (92-96) aboard the aircraft (81).

公开(公告)号：EP1004031A1

公开(公告)日：2000-05-31

申请号：EP98943182.0

申请日：1998-08-10

申请人： HENDRY MECHANICAL WORKS

发明人： PARKER, Michael, T. ,  HAM, MARGARET, F. ,  KEENAN, James, J. ,  BENOIT, Luc, Pierre

IPC分类号： G01R23/00

CPC分类号： G01R23/18 ,  G01R29/0842

摘要： Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena in that all essential information that signifies 'arc' is contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset (16) of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs, where cross-induction among neighboring circuits is lower, and where travel between the arc (12) and the arc signature pickup (23) is longer than at the high frequencies customary for electric arc detection. Fractal subset transformation (17) reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths (242, 342) or treated as modulated carriers (42) for monitoring. Aircraft may be equipped with spark monitoring systems (80) that record (82-86) occurence of dangerous sparking at different locations (92-96) aboard the aircraft (81).

公开(公告)号：EP0507782B1

公开(公告)日：1996-01-17

申请号：EP90917578.8

申请日：1990-10-24

申请人： HENDRY MECHANICAL WORKS

发明人： HAM, Howard, M., Jr. ,  KEENAN, James, J.

IPC分类号： H01H1/00

CPC分类号： H02H1/0015 ,  G01R29/26 ,  G01R31/1272

摘要： A principal object of the invention is to detect sparks or arcs (12) in electric circuits (13) or otherwise to detect a spectrum of a broad band of distinct instantaneous radio frequencies in radio frequency noise. The invention rejects extraneous narrow-band signals having frequencies within the broad band, such as by means of filters (21, 27, 29) or a balanced mixer arrangement (32-39). The mixer (37) may be fed from a radio frequency signal duplicator (32, 33, 34) having an input (25) coupled to a source of the spectrum, a first ouptut for one spectrum as duplicated by that duplicator connected to one mixer input (35), and a second output for the other spectrum as duplicated by that duplicator connected to the other mixer input (36). Alternatively, the radio frequency mixer (37) may receive the output of a wide band noise generator (68) at its other input (36, Fig. 5). A combination of a multitude of the distinct instantaneous radio frequencies indicative of the spectrum of the arc (12) is detected, such as with a frequency combination detector (42) having an input (40) coupled to the radio frequency mixer output (38).

摘要翻译： PCT No.PCT / US90 / 06113 Sec。 371日期1993年3月18日 102（e）1993年3月18日PCT PCT 1990年10月24日PCT公布。 公开号WO92 / 08143 日本。本发明的主要目的是检测电路（13）中的火花或弧（12）或以其他方式检测在射频噪声中具有不同瞬时无线电频率的宽频谱的信号。 本发明通过诸如借助于滤波器（21,27,29）或平衡混频器装置（32-39）来抑制具有宽带内的频率的外来窄带信号。 混频器37可以从不平衡的射频信号馈送到具有耦合到具有频谱的信号源的输入端（25）的平衡转换器（32），并且具有连接到混频器输入端（35,36）的平衡输出。 或者，射频混频器（37）可以在其另一个输入（图5中的36）处接收宽带噪声发生器（68）的输出。 诸如用具有耦合到射频混频器输出（38）的输入（40）的频率组合检测器（42））来检测指示频谱或电弧（12）的多个不同瞬时无线电频率的组合， 。

公开(公告)号：EP1257836A1

公开(公告)日：2002-11-20

申请号：EP01942718.6

申请日：2001-01-18

申请人： HENDRY MECHANICAL WORKS

发明人： PARKER, Michael, T.

IPC分类号： G01R31/12

CPC分类号： G01R31/12

摘要： Systems of monitoring electric arcs substantially eliminate alternating current fundamentals and harmonics from monitored arc signatures. Such systems phase shift, delay or otherwise store a representation of the alternating current fundamental and harmonics, and substantially purge such alternating current fundamental and harmonics from the arc signatures with the stored representation of such alternating current fundamental and harmonics, while substantially preserving chaotic arc signature components. Electric arcs are then monitored from such purged arc signatures. Imperfections in such purging are detected and corrected for a provision of detectable arc signature components free of fundamentals and harmonics that could cause malfunction and false alarms.

公开(公告)号：EP0507782A4

公开(公告)日：1992-12-30

申请号：EP90917578

申请日：1990-10-24

申请人： HENDRY MECHANICAL WORKS

发明人： HAM, HOWARD, M., JR. ,  KEENAN, JAMES, J.

IPC分类号： G01R29/08 ,  G01R29/26 ,  G01R31/00 ,  G01R31/12 ,  H01H1/00 ,  H02H1/00

CPC分类号： H02H1/0015 ,  G01R29/26 ,  G01R31/1272

摘要： A principal object of the invention is to detect sparks or arcs (12) in electric circuits (13) or otherwise to detect a spectrum of a broad band of distinct instantaneous radio frequencies in radio frequency noise. The invention rejects extraneous narrow-band signals having frequencies within the broad band, such as by means of filters (21, 27, 29) or a balanced mixer arrangement (32-39). The mixer (37) may be fed from a radio frequency signal duplicator (32, 33, 34) having an input (25) coupled to a source of the spectrum, a first ouptut for one spectrum as duplicated by that duplicator connected to one mixer input (35), and a second output for the other spectrum as duplicated by that duplicator connected to the other mixer input (36). Alternatively, the radio frequency mixer (37) may receive the output of a wide band noise generator (68) at its other input (36, Fig. 5). A combination of a multitude of the distinct instantaneous radio frequencies indicative of the spectrum of the arc (12) is detected, such as with a frequency combination detector (42) having an input (40) coupled to the radio frequency mixer output (38).

摘要翻译： PCT No.PCT / US90 / 06113 Sec。 371日期1993年3月18日 102（e）1993年3月18日PCT PCT 1990年10月24日PCT公布。 公开号WO92 / 08143 日本。本发明的主要目的是检测电路（13）中的火花或弧（12）或以其他方式检测在射频噪声中具有不同瞬时无线电频率的宽频谱的信号。 本发明通过诸如借助于滤波器（21,27,29）或平衡混频器装置（32-39）来抑制具有宽带内的频率的外来窄带信号。 混频器37可以从不平衡的射频信号馈送到具有耦合到具有频谱的信号源的输入端（25）的平衡转换器（32），并且具有连接到混频器输入端（35,36）的平衡输出。 或者，射频混频器（37）可以在其另一个输入（图5中的36）处接收宽带噪声发生器（68）的输出。 诸如用具有耦合到射频混频器输出（38）的输入（40）的频率组合检测器（42））来检测指示频谱或电弧（12）的多个不同瞬时无线电频率的组合， 。

公开(公告)号：EP1053479A4

公开(公告)日：2003-07-02

申请号：EP97938382

申请日：1997-08-14

申请人： HENDRY MECHANICAL WORKS

发明人： PARKER MICHAEL T ,  HAM MARGARET F ,  KEENAN JAMES J ,  BENOIT LUC PIERRE

IPC分类号： G01R31/02 ,  B23K9/095 ,  G01R23/18 ,  G01R29/00 ,  G01R29/08 ,  H01T1/12 ,  H01T15/00 ,  G01R31/08 ,  G01R31/00 ,  H02H1/00

CPC分类号： G01R23/18 ,  G01R29/0842

摘要： Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena with all essential information that signifies "arc" contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs (22), where cross-induction among neighboring circuits is lower, and where travel between the arc and the arc signature pickup (23) is longer than at the high frequencies customary for arc detection. Fractal subset transformation reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths or treated as modulated carriers.

公开(公告)号：EP0507782A1

公开(公告)日：1992-10-14

申请号：EP90917578.0

申请日：1990-10-24

申请人： HENDRY MECHANICAL WORKS

发明人： HAM, Howard, M., Jr. ,  KEENAN, James, J.

IPC分类号： G01R29 ,  G01R31 ,  H01H1 ,  H02H1

CPC分类号： H02H1/0015 ,  G01R29/26 ,  G01R31/1272

摘要： Un objet principal de l'invention est de détecter des étincelles ou des arcs (12) dans des circuits électriques (13) ou de détecter un spectre d'une large bande de radiofréquences instantanées et distinctes dans des bruits de radiofréquence. L'invention permet de rejeter des signaux étrangers de bande étroite présentant des fréquences dans la large bande, au moyen de filtres (21, 27, 29) ou d'un appareil mélangeur équilibré (22-39), notamment. Le mélangeur (37) peut être alimenté à partir du duplicateur de signaux de radiofréquences (32, 33, 34) ayant une entrée (25) couplée à une source du spectre, une première sortie pour un spectre dupliqué par le duplicateur connectée à une entrée (35) du mélangeur, et une seconde sortie destinée à l'autre spectre dupliqué par le duplicateur et connectée à l'autre entrée (36) du mélangeur. Dans une variante, le mélangeur de radiofréquences (37) peut recevoir la sortie d'un générateur de bruits à large bande (68) à son autre entrée (36, fig. 5). Une combinaison d'une multiplicité de radiofréquences distinctes et instantanées indicatrices du spectre ou de l'arc (12) est détectée, par exemple avec un détecteur de combinaison de fréquences (42) dont une entrée (40) est couplée à la sortie (38) du mélangeur de radiofréquences.

摘要翻译： PCT No.PCT / US90 / 06113 Sec。 371日期1993年3月18日 102（e）1993年3月18日PCT PCT 1990年10月24日PCT公布。 公开号WO92 / 08143 日本。本发明的主要目的是检测电路（13）中的火花或弧（12）或以其他方式检测在射频噪声中具有不同瞬时无线电频率的宽频谱的信号。 本发明通过诸如借助于滤波器（21,27,29）或平衡混频器装置（32-39）来抑制具有宽带内的频率的外来窄带信号。 混频器37可以从不平衡的射频信号馈送到具有耦合到具有频谱的信号源的输入端（25）的平衡转换器（32），并且具有连接到混频器输入端（35,36）的平衡输出。 或者，射频混频器（37）可以在其另一个输入（图5中的36）处接收宽带噪声发生器（68）的输出。 诸如用具有耦合到射频混频器输出（38）的输入（40）的频率组合检测器（42））来检测指示频谱或电弧（12）的多个不同瞬时无线电频率的组合， 。