Embedded arm strain sensors

a technology of strain gage and embedded arm, which is applied in the direction of program control, instruments, testing/monitoring control systems, etc., can solve the problems of relatively difficult use of measurement installations and high cos

Inactive Publication Date: 2011-07-21
FARO TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Portable AACMMs represent a vast improvement over known stationary or fixed, cost-intensive and relatively difficult to use measurement installations, particularly in the amount of time it takes to perform dimensional measurements of relatively complex parts.

Method used

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  • Embedded arm strain sensors
  • Embedded arm strain sensors
  • Embedded arm strain sensors

Examples

Experimental program
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Embodiment Construction

[0015]Exemplary embodiments include systems and methods for measuring strain on arm segments of a portable articulated arm coordinate measuring machine either to compensate measurement results to improve accuracy or to alert the operator of the need for corrective action.

[0016]FIGS. 1A and 1B illustrate, in perspective, a portable articulated arm coordinate measuring machine (AACMM) 100 according to various embodiments of the present invention, an articulated arm being one type of coordinate measuring machine. As shown in FIGS. 1A and 1B, the exemplary AACMM 100 may comprise a six or seven axis articulated measurement device having a measurement probe housing 102 coupled to an arm portion 104 of the AACMM 100 at one end. The arm portion 104 comprises a first arm segment 106 coupled to a second arm segment 108 by a first grouping of bearing cartridges 110 (e.g., two bearing cartridges). A second grouping of bearing cartridges 112 (e.g., two bearing cartridges) couples the second arm ...

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PUM

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Abstract

A portable articulated arm coordinate measurement machine (AACMM) can include a manually positionable articulated arm portion, a measurement device attached to the first end, a structural component of the AACMM, wherein the structural component has an axial direction, at least three strain gage sensors, each having a sensitive axis, coupled to the structural component, wherein the sensitive axis of each strain gage sensor is oriented approximately parallel to the axial direction, each strain gage sensor is approximately intersected by a transverse plane perpendicular to the axial direction, each strain gage sensor produces an analog strain gage signal, and the strain gage sensors are disposed to provide data sufficient to determine a bending strain at any point residing on both the structural component and the transverse plane and an electronic circuit that receives the position signal and provides data corresponding to a position of the measurement device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of provisional application No. 61 / 296,555 filed Jan. 20, 2010, the content of which is hereby incorporated by reference in its entirety.BACKGROUND[0002]The present disclosure relates to a coordinate measuring machine, and more particularly to a portable articulated arm coordinate measuring machine having strain gage sensors configured to measure strain in structural components of the portable articulated arm coordinate measuring machine.[0003]Portable articulated arm coordinate measuring machines (AACMMs) have found widespread use in the manufacturing or production of parts where there is a need to rapidly and accurately verify the dimensions of the part during various stages of the manufacturing or production (e.g., machining) of the part. Portable AACMMs represent a vast improvement over known stationary or fixed, cost-intensive and relatively difficult to use measurement installations, particu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G08B21/00G01B5/008
CPCG01B5/012G01B11/007G01B21/047G05B19/401G05B2219/45061G05B2219/24067G05B2219/37193G05B2219/40233G05B2219/40596G05B19/406G01B5/00G01B5/0002G01B5/004G01B5/008G01B7/008G01B11/00G01B11/005G01B21/04G01B21/045G01D9/00G05B19/4061G05B19/4063G05B19/408G05B23/0221
Inventor ATWELL, PAUL C.STOKES, BURNHAM
Owner FARO TECH INC
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