Method for testing the noise of vehicles when driving over a test track

Patent metadata

Field	Value
Publication number	US-11085813-B2
Application number	US-201816215703-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Dec 12, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A method is provided for testing noise of vehicles when driving over a test track. This method includes carrying out noise measurements in a vehicle driving over the test track by means of sensors arranged inside the vehicle, determining the positions of the vehicle driving on the test track and assigning the respective measurement to the position of the vehicle on the test track, evaluating the measurement results of the noise measurements, based on the respective test track position, during a comparison with known noise characteristics of comparison vehicles. The method enables an efficient objective noise test of vehicles when driving over a test track.

First claim

What is claimed is:

1. A method for testing the noise of a vehicle when driving over a test track, the method comprising:
using sensors arranged inside a vehicle for carrying out noise measurements while the vehicle is driving over the test track;
determining positions of the vehicle driving on the test track;
assigning the noise measurements carried out by the sensors arranged inside the vehicle to the positions of the vehicle on the test track at which the noise measurements were made;
comparing the noise measurements carried out by the sensors arranged inside the vehicle at the respective positions on the test track at which the measurements were made with known noise characteristics of comparison vehicles at the same respective positions on the test track; and
evaluating the measurement results of the noise measurements based on the comparison with the known noise characteristics of the comparison vehicles.

2. The method of claim 1 , wherein the noise measurements are carried out in a vehicle interior of the vehicle.

3. The method of claim 2 , wherein the noise measurements are carried out by a measuring system.

4. The method of claim 3 , wherein the measuring system has airborne and/or structure-borne sound sensors.

5. The method of claim 4 , wherein the sensors are arranged in a distributed manner in the vehicle interior and a reference to the position of the noise source is established using their noise measurements.

6. The method of claim 3 , wherein the respective vehicle position on the test track is determined by the measuring system.

7. The method of claim 1 , wherein the respective vehicle position on the test track is captured by light barriers.

8. The method of claim 1 , wherein the measurement results are evaluated according to the noise to be tested by a fast Fourier transform (FFT), modulation or tonality.

9. The method of claim 1 , wherein the known noise characteristics of comparison vehicles are stored in a database and the measurement results are evaluated on the basis of said noise characteristics.

10. The method of claim 9 , wherein the measurement results, based on the respective test track position, are stored only by the measuring system and are transmitted wirelessly to an evaluation computer or a factory network at the end of the test.

11. The method of claim 1 , wherein the measurement results are evaluated automatically.

12. The method of claim 1 , wherein selected noise characteristics of each vehicle are stored and are compared with subsequent noise measurements of this vehicle or with subsequent noise measurements of comparable vehicles.

13. The method of claim 1 , wherein an item of information relating to the subsequent work required in the vehicle is assigned to a respectively determined error pattern of the noise characteristics and, if there is a substantial correspondence to known error patterns, this subsequent working solution is concomitantly output as information.

14. The method of claim 1 , wherein the respective vehicle position on the test track is captured by induction barriers.

15. The method of claim 1 , wherein the respective vehicle position on the test track is captured by a global positioning system (GPS).

Assignees

• Porsche Ag

Inventors

• Franke Robert
• Schlimpert Nico

Classifications

• G01H3/08 Primary

  Analysing frequencies present in complex vibrations, e.g. comparing harmonics present {(acoustic presence detection G01V1/001)} · CPC title

• G01C21/005

  with correlation of navigation data from several sources, e.g. map or contour matching (G01C21/30 takes precedence) · CPC title

• G01M17/007

  Wheeled or endless-tracked vehicles (G01M17/08 takes precedence) · CPC title

• G01M7/00

  Vibration-testing of structures; Shock-testing of structures (G01M9/00 takes precedence) · CPC title

• G06F17/142

  Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm · CPC title