Articulating measuring arm with laser scanner

• US 9,618,330 B2
• Filed: 01/06/2015
• Issued: 04/11/2017
• Est. Priority Date: 10/16/2008
• Status: Active Grant

• Current Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Original Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Inventors: Ferrari, Paul
• Primary Examiner(s): Bennett, G. Bradley
• Application Number:
  US14/590,878
• Publication Number:
  US 20150192409A1
• Time in Patent Office: 826 Days
• Field of Search: 33503
• CPC Class Codes: G01B 11/007 feeler heads therefor
• CPC Class Codes: G01B 11/022 by means of tv-camera scanning
• CPC Class Codes: G01B 5/012 Contact-making feeler heads therefor
• CPC Class Codes: Y10S 33/21 with laser

Abstract

A coordinate measurement device comprises an articulated arm having a first end, a second end, and a plurality of jointed arm segments therebetween. Each arm segment defines at least one axis of rotation. A laser scanner assembly is coupled to the second end of the arm and is rotatable about a last axis of rotation of the articulated arm. The laser scanner assembly comprises a laser and an image sensor. The laser is positioned on an opposite side of the last axis of rotation from the image sensor.

Claims

1. An articulated arm CMM system comprising:

an articulated arm CMM comprising a plurality of articulated arm members rotatably connected to each other, a plurality of sensors configured to measure rotational positions of the articulated arm members, a receiving portion and a distal end, and a base portion at a proximal end, the receiving portion comprising;

a recess shaped to receive a laser; and

an arm data port; and

an optical position detecting device configured to mount to the receiving portion of the articulated arm CMM, the optical position detecting device comprising;

a laser shaped to be received within the recess; and

a device data port configured to engage with the arm data port to provide a data connection between the optical position detecting device and the arm.

2. The articulated arm CMM system of claim 1, wherein the distal end of the articulated arm CMM and the optical position detecting device are configured to attach by a snap-lock mechanism.

3. The articulated arm CMM system of claim 1, wherein the distal end of the articulated arm CMM and the optical position detecting device are configured to attach using a kinematic mount.

4. An optical position detecting device configured to mount to an articulated arm CMM, the optical position detecting device comprising:

a laser extending from the optical position detecting device;

an optical sensor configured to receive light from the laser;

a data port configured to engage with a corresponding data port on a distal end of an articulated arm CMM to which the optical position detecting device is configured to mount; and

a portion of a snap-lock mechanism configured to engage with a portion of a snap-lock mechanism on the distal end of the articulated arm CMM to which the optical position detecting device is configured to mount, such that the optical position detecting device can form a snap-lock with the distal end of the articulated arm CMM.

5. The optical position detecting device of claim 4, wherein the optical position detecting device further comprises a portion of a kinematic mount configured to engage with a portion of a kinematic mount on the distal end of the articulated arm CMM to which the optical position detecting device is configured to mount, such that the optical position detecting device can form a kinematic mount with the distal end of the articulated arm CMM.

6. A method of mounting an optical position detecting device to an articulated arm CMM, the method comprising:

aligning a data port on the optical position detecting device with a data port on the articulated arm CMM;

aligning a laser extending from the optical position detecting device with a recess in the articulated arm CMM configured to receive a laser;

attaching the optical position detecting device to the articulated arm CMM such that the data ports engage to form a data connection and the laser is received in the recess; and

measuring one or more coordinates with the articulated arm CMM and the optical position detecting device.

7. The method of claim 6, further comprising attaching the optical position detecting device to the articulated arm CMM by a snap-lock mechanism.

8. The method of claim 6, further comprising attaching the optical position detecting device to the articulated arm CMM using a kinematic mount.