Method and apparatus for analysis and assessment of measurement data of a measurement system

• US 20110307217A1
• Filed: 08/22/2011
• Published: 12/15/2011
• Est. Priority Date: 01/14/2008
• Status: Abandoned Application

• Current Assignee: AVL List GmbH (List Privatstiftung)
• Original Assignee: AVL List GmbH (List Privatstiftung)
• Inventors: Fritz, Sven C., Guntschnig, Thomas, Stettner, Martin, Berger, Marvin, Fuchs, Werner
• Application Number:
  US13/137,496
• Publication Number:
  US 20110307217A1
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: G01D 3/08 with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
• CPC Class Codes: G01M 15/06 by monitoring positions of pistons or cranks

Abstract

A method for analysis and assessment of measurement data of a measurement system having at least one measurement channel provides for the assessment of the measurement data at freely selectable times and over a freely selectable period on the basis of at least one of a plurality of predeterminable criteria. In order in this case to develop a central and generally applicable measurement data diagnosis, in which any desired number of measurement channels can be monitored at the same time with little effort and with good result representation, preferably with determination of the faulty channels, the raw data of the measurement channel is supplied to a fault isolation stage and then to a fault classification stage, and a measure is then determined for the quality of the measurement data of the respective measurement channel. An input for the raw data of the measurement channel as well as a unit in which a fault isolation stage and then a fault classification stage are implemented are provided for this purpose in the apparatus for analysis and assessment of measurement data of a measurement system.

Claims

1. A method for analysis and assessment of measurement data of a measurement system having at least one measurement channel, comprising the assessment of the measurement data at freely selectable times and over a freely selectable period on the basis of at least one of a plurality of predeterminable criteria, wherein the raw data of the measurement channel is supplied to a fault isolation stage and then to a fault classification stage, and in that a measure is then determined for the quality of the measurement data of the respective measurement channel.

2. The method according to claim 1, wherein in the fault isolation stage, the raw data is first of all supplied to a fault recognition stage.

3. The method according to claim 2, wherein after being processed in the fault isolation stage, the data is supplied to a fault identification stage within the fault classification stage.

4. The method according to claim 3, wherein the raw data is recorded at the correct time and is supplied as required to the fault isolation stage and to its fault recognition stage.

5. The method according to claim 4, wherein the fault isolation stage, or its fault recognition stage, carries out a high-frequency signal analysis on the raw data.

6. The method according to claim 5, wherein the current measure for the quality of the measurement data of any desired measurement channel is compared with a predeterminable limit value, whose undershooting is indicated.

7. The method according to claim 6, wherein a chronological record is generated over the profile of the measures for the quality of the measurement data, and is indicated.

8. The method according to claim 7, wherein the current status of the fault isolation stage is read and is indicated.

9. The method according to claim 8, wherein the operating modes of stationary fault recognition, cyclic online fault recognition (ZOF) and measurement-synchronous fault recognition (MSF) are provided.

10. The method according to claim 9, wherein the operating modes can be provided individually or in parallel, in particular the cyclic online fault recognition (ZOF) and the measurement-synchronous fault recognition (MSF).

11. An apparatus for analysis and assessment of measurement data of a measurement system, comprising a unit for the assessment of the measurement data of at least one measurement channel of the test rig at any desired time on the basis of a plurality of predeterminable criteria, including an input for the raw data of the measurement channel, a unit in which a fault isolation stage and then a fault classification stage are implemented, and an output for a measure for the quality of the measurement data of the respective channel.

12. The apparatus according to claim 11, wherein a fault recognition stage with an input for the raw data is implemented in the fault isolation stage.

13. The apparatus according to claim 12, wherein the output of the fault isolation stage is connected to an input of a fault recognition stage which is implemented within the fault classification stage.

14. The apparatus according to claim 13, wherein a cyclic buffer is provided for recording the raw data at the correct time and is connected to the input of the fault isolation stage and/or its fault recognition stage, for checking by this stage or these stages.

15. The apparatus according to claim 14, wherein a high-frequency signal analysis device for the raw data is provided in the unit with the fault isolation stage and its fault recognition stage.

16. The apparatus according to claim 15, wherein a freely selectable limit value for the measure for the quality of the measurement data of any desired measurement channel is stored, and in that comparison logic is provided which compares the current measure with the limit value and signals its undershooting, with this signal preferably driving an indication device.

17. The apparatus according to claim 16, wherein a memory area which can be read is provided for a chronological record over the profile of the measures for the quality of the measurement data.

18. The apparatus according to claim 17, wherein visualization is provided for the current status of the fault isolation stage, and can be called up.