Device and method for recognizing disruptions in an on-board power supply

Patent metadata

Field	Value
Publication number	US-2016349301-A1
Application number	US-201615163837-A
Country	US
Kind code	A1
Filing date	May 25, 2016
Priority date	May 26, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

The present invention relates to a simple and reliable device for recognizing disruptions in an on-board power supply. The device comprises a reception unit adapted to receive a first and a second temporal sequence of measurement values, the measurement values of the first sequence being measured at a first measuring point of the on-board power supply and the measurement values of the second sequence being measured at a second measuring point of the on-board power supply differing from the first measuring point, and the measurement values representing current or voltage values, and an evaluation unit adapted to recognize the occurrence of a disruption based on a comparison of the first dispersion of the measurement values of the first sequence and a second dispersion of the measurement values of the second sequence.

First claim

1 - 12 . (canceled)

13 . A device for recognizing disruptions in an on-board power supply, comprising:
a reception unit configured to receive a first and a second temporal sequence of measurement values, wherein the measurement values of the first sequence are measured at a first measuring point of the on-board power supply and the measurement values of the second sequence are measured at a second measuring point of the on-board power supply differing from the first measuring point, and the measurement values represent current or voltage values; and an evaluation unit configured to recognize the occurrence of a disruption based on a comparison of a first dispersion of the measurement values of the first sequence and a second dispersion of the measurement values of the second sequence.

14 . The device according to claim 13 , wherein the evaluation unit is configured to recognize the occurrence of a disruption when the first dispersion differs by a predetermined percentage from the second dispersion.

15 . The device according to claim 13 , wherein the evaluation unit is configured to:
recognize the occurrence of a parallel arc as the disruption when the measurement values represent current values; and recognize the occurrence of a serial arc as the disruption when the measurement values represent voltage values.

16 . The device according to claim 13 , wherein the reception unit is configured to receive new measurement values for at least one of the first sequence or the second sequence; and
the evaluation unit is configured to calculate at least one of the first dispersion or the second dispersion, each in a moving time window.

17 . The device according to claim 13 , further comprising:
a first measurement unit configured to measure the measurement values of the first sequence and transmit the measured measurement values to the reception unit.

18 . The device according to claim 17 , further comprising:
a second measurement unit configured to measure the measurement values of the second sequence and to transmit the measured measurement values to the reception unit.

19 . The device according to claim 13 , wherein a first measurement value that is measured at a first point in time at the first measuring point and a second measurement value is measured at a second point in time, asynchronous to the first point in time, at the second measuring point, and the measurement values of the two measuring points are each simultaneously used for the intended purpose of the dispersion across moving time windows, and the continuous dispersion is ascertained in a time window for the first measuring point and the continuous dispersion is ascertained in a time window for the second measuring point.

20 . The device according to claim 13 , wherein, when the measurement values represent current values, the evaluation unit is further configured to recognize the occurrence of a disruption if at least one of the measurement values in the first or the second sequence exceeds a predetermined threshold value.

21 . The device according to claim 13 , wherein:
the on-board power supply includes a current distributor, a load and an electrical wire connecting the current distributor and the load; and the first measuring point is located on a connecting part of the current distributor with the electrical wire or the second measuring point is located on a connecting part of the load with the electrical wire.

22 . The device according to claim 13 , wherein the processing of the measurement values into data representing the dispersion of the measurement values occurs prior to a transmission of the data via a communication bus.

23 . A method for recognizing disruptions in an on-board power supply, comprising the following steps:
receiving a first and a second temporal sequence of measurement values, wherein the measurement values of the first sequence are measured at a first measuring point of the on-board power supply and the measurement values of the second sequence are measured at a second measuring point of the on-board power supply differing from the first measuring point, and the measurement values represent current or voltage values; and recognizing the occurrence of a disruption based on the recognition of a deviation from a first dispersion of the measurement values of the first sequence and a second dispersion of the measurement values of the second sequence.

24 . A tangible, non-transitory computer-readable medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform operations comprising:
receiving a first and a second temporal sequence of measurement values, wherein the measurement values of the first sequence are measured at a first measuring point of the on-board power supply and the measurement values of the second sequence are measured at a second measuring point of the on-board power supply differing from the first measuring point, and the measurement values represent current or voltage values; and recognizing the occurrence of a disruption based on the recognition of a deviation from a first dispersion of the measurement values of the first sequence and a second dispersion of the measurement values of the second sequence.

Assignees

• Draexlmaier Lisa Gmbh
• Volkswagen Ag

Inventors

• Wortberg Michael
• Rudolph Florian

Classifications

• G01R31/1272

  of cable, line or wire insulation, e.g. using partial discharge measurements (locating faults in cables G01R31/083) · CPC title

• G01R31/12

  Testing dielectric strength or breakdown voltage {; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing (G01R31/08, G01R31/327 and G01R31/72 take precedence; measuring in plasmas G01R19/0061; measuring dielectric constants G01R27/2617; ESD, EMC or EMP testing of circuits G01R31/002)} · CPC title

• H02H1/0015

  Using arc detectors · CPC title

• B60R16/0232

  for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions · CPC title

• G01R31/006 Primary

  on road vehicles, e.g. automobiles or trucks (testing of ignition installations peculiar to internal combustion engines F02P17/00) · CPC title