RECORDING MACHINE VISION SYSTEM

• US 20100259608A1
• Filed: 09/03/2008
• Published: 10/14/2010
• Est. Priority Date: 09/03/2007
• Status: Active Grant

• Current Assignee: Oy Mapvision Ltd.
• Original Assignee: Oy Mapvision Ltd.
• Inventors: Knuuttila, Antti
• Granted Patent: US 10,012,500 B2
• Time in Patent Office: Days
• US Class Current: 348/135
• CPC Class Codes: G01B 21/042 Calibration or calibration artifacts G01B3/30, G01B9/02072 take precedence
• CPC Class Codes: G01B 21/045 Correction of measurements G01B9/02055 takes precedence

Abstract

A method and a system for the quality control of objects after they have been supplied. After manufacturing, the object is checked by means of a measuring machine vision system. The measurement results of the machine vision system are recorded in a data system together with the corresponding calibration data. When the calibration data is known, new measurements can be conducted later from the recorded images at a time when the actual object has already been supplied and possibly placed in an end product.

Claims

1. A method for measuring an object by means of a measuring machine vision system, said machine vision system being calibrated to a measurement space, the method comprising:

capturing images of an object with a set of cameras;

wherein the method further comprises the steps of;

recording the images in a data system; and

associating the calibration data of the measurement event in question or the information required for calculating the calibration data with said recorded images.

2. The method according to claim 1, wherein the measuring system is calibrated to a three-dimensional measurement space.

3. The method according to claim 1, wherein at least two cameras are calibrated for the measuring system.

4. The method according to claim 1, wherein an indicating device is calibrated for the measuring system.

5. The system according to claim 1, wherein the object is re-measured using the recorded images and the calibration data of the measurement event.

6. The method according to claim 1, wherein the object is provided with a unique identifier.

7. A system for measuring an object by means of a measuring machine vision system, said machine vision system being calibrated to a measurement space, the system comprising:

an object that is being measured;

a camera system comprising at least two cameras; and

a data system linked to said camera system;

wherein the system is arranged to;

measure the object with the camera system;

record the images in the data system; and

associate the calibration data of the measurement event in question or the information required for calculating the calibration data with said recorded images.

8. The system according to claim 7, wherein the system further comprises an external data warehouse for storing said images and the corresponding measurement events.

9. The system according to claim 7, wherein the system further comprises an indicating device calibrated to the same measurement space with said camera system.

10. The system according to claim 7, wherein the measuring system is arranged to self-calibrate after each measurement.

11. The system according to claim 7, wherein the measuring system is calibrated to a three-dimensional measurement space.

12. The system according to claim 7, wherein the measuring system is further arranged to re-measure the object using the recorded images and the calibration data of the measurement event.

13. The system according to claim 7, wherein the measured object is provided with a unique identifier.