Measuring machine and method for automated measurement of an object

Patent metadata

Field	Value
Publication number	US-9683828-B2
Application number	US-201314646365-A
Country	US
Kind code	B2
Filing date	Nov 20, 2013
Priority date	Nov 21, 2012
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The invention relates to a measuring machine and a method for automated measurement of an object and detection of differences between a feature of the object and CAD data of the object. The measuring machine comprises a probe head, a probe system comprising a probe and measurement functionality for determining three-dimensional coordinates of a feature of the object, a local computer terminal, an assigned memory unit, and an assigned set of measurement software programs for controlling the measuring machine. The stored CAD data of the object comprise typical dimensions and tolerances of the features, and the assigned set of measurement software programs comprises an optimization algorithm for the measurement of each feature which algorithm is designed to automatically select measuring parameters of the measuring machine and/or a measurement software program from the set of measurement software programs.

First claim

What is claimed is:

1. A measuring machine for automated measurement of an object and detection of differences between a feature of the object and CAD data of the object, the CAD data being stored in a data base, the measuring machine comprising
a probe head and a probe system comprising a probe to be connected with the probe head and measurement functionality for determining three-dimensional coordinates of a feature of the object,
a local computer terminal that is connected to or part of the measuring machine and connected with the internet,
an assigned memory unit for storing the data base comprising the CAD data, and
an assigned set of measurement software programs for controlling the measuring machine, wherein:
the assigned set of measurement software programs for controlling the measuring machine is installed at least partially on a central computer and accessible over an internet connection,
the stored CAD data of the object comprise typical dimensions and tolerances of the features of the object, and
the assigned set of measurement software programs for controlling the measuring machine comprises an optimization algorithm for the measurement of each feature, the optimization algorithm being designed to select automatically, dependent on the stored typical dimensions and tolerances of the features of the object to be measured,
measuring parameters of the measuring machine, and/or
a measurement software program from the set of measurement software programs,

wherein the optimization algorithm is adapted to effect, after selection of a feature of the object to be measured by the operator, a presentation of a set of options for the operator, the set comprising:
possible accuracy levels for the measurement of the feature,
an input option for the operator for selection of an accuracy level,
needed software packages comprising additional measurement software programs for measuring the feature with the selected accuracy level, the needed software packages being installed on the central computer, and
an input option for the operator for selection of a needed software package to be accessed over the internet connection.

2. The measuring machine according to claim 1 , wherein the measuring machine comprises a coordinate measuring machine.

3. The measuring machine according to claim 1 , wherein:
the probe head is supported
for movement along three mutually perpendicular axes,
for movement around a rotational axis, or
by a parallel kinematics structure.

4. The measuring machine according to claim 1 , wherein:
the assigned memory unit is provided at least partially
at the site of the local computer terminal,
in a private or public cloud and/or
on a central computer of a network and/or an internet server and accessible over a local network connection and/or an internet connection, respectively.

5. The measuring machine according to claim 1 , wherein:
the computer terminal is connected with the internet by a modem.

6. The measuring machine according to claim 1 , wherein:
the assigned set of measurement software programs for controlling the measuring machine is installed at least partially
at the site of the local computer terminal, and/or
in a private or public cloud.

7. A method for automated measurement of an object with a measuring machine and automated detection of deviations between a feature of the object and CAD data of the object, the CAD data being stored in a data base, the measuring machine comprising
a local computer terminal that is connected to or part of the measuring machine and connected with the internet,
an assigned memory unit for storing the data base comprising the CAD data, and
an assigned set of measurement software programs for controlling the measuring machine,
the method comprising the steps of
selecting, by an operator of the measuring machine, a feature of the object to be measured by the measuring machine,
selecting a probe system and measurement parameters of the measuring machine,
measuring the feature of the object, and
detecting deviations between the feature and the CAD data, and presenting deviations between the feature and the CAD data, wherein:
the assigned set of measurement software programs for controlling the measuring machine is installed at least partially on a central computer and accessible over an internet connection,
the stored CAD data of the object comprises typical dimensions and tolerances of the features of the object, and,
in the step of selecting a probe system and measurement parameters of the measuring machine, an optimization algorithm for the measurement of each feature automatically selects, dependent on the stored typical dimensions and tolerances of the features of the object to be measured,
measuring parameters of the measuring machine, and/or
a measurement software program from a set of measurement software programs,

wherein after selection of a feature of the object to be measured, effected by the optimization algorithm a set of options is presented to the operator, the set comprising:
possible accuracy levels for measurement of the feature,
an input option for the operator for selection of an accuracy level,
needed software packages for measuring the feature with the selected accuracy level, the needed software packages being installed on the central computer, and
an input option for the operator for selection of a software package,
wherein a selected software package is accessed over the internet connection.

8. The method according to claim 7 , wherein:
the measuring machine is a coordinate measuring machine comprising
a probe head, and
a probe system comprising a probe to be connected with the probe head and measurement functionality for determining three-dimensional coordinates of a feature of the object.

9. The method according to claim 7 , wherein:
the probe head is supported for movement along three mutually perpendicular axes.

10. The method according to claim 7 , wherein:
features of the object having different sizes and tolerances are measured.

11. The method according to claim 7 , wherein:
the set of measurement software programs comprises measurement software programs for measuring features of different sizes and tolerances, which are automatically selected and executed in the course of performing a measurement.

12. The method according to claim 7 , wherein:
the assigned memory unit is installed at least partially
at the site of the local computer terminal,
in a private or public cloud and/or
on a central computer of a network and/or an internet server and accessed over a local network connection and/or an internet connection, respectively.

13. The method according to claim 7 , wherein:
the assigned set of measurement software programs for controlling the measuring machine is installed at least partially
at the site of the local computer terminal, and the method is executed at least partially on the local computer, and/or
in a private or public cloud.

14. The method according to claim 7 , wherein:
the automatic selection of the measurement software program is subject to
parameters of the measuring machine,
attributes of the feature of the object to be measured, and/or
operator-selected parameters.

15. The method according to claim 14 , wherein:
the parameters of the measuring machine include a size of the measuring machine.

16. The method according to claim 14 , wherein:
the operator-selected parameters include an accuracy or tolerance level and/or a throughput or speed level of measurement to be executed.

Assignees

• Hexagon Technology Ct Gmbh

Inventors

• Pettersson Bo
• Siercks Knut
• Zebhauser Benedikt

Classifications

• G01B5/008 Primary

  using coordinate measuring machines · CPC title

• Y02P90/265

  Cross-Sectional Technologies · mapped topic

• G05B19/401

  characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes (G05B19/19 takes precedence) · CPC title

• G05B2219/37443

  Program cmm, coordinate measuring machine, use cad data · CPC title

• G01B21/04 Primary

  by measuring coordinates of points · CPC title