Extendable spacer device
AssigneePruftechnik Dieter Busch AG
InventorsMichael Hermann, Werner Landmann
Life of this patent
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Abstract
A spacer device for laser-optical measurement of hollow cylinders has at least two, preferably three arms which are coupled or interlaced with one another and which can be moved relative to one another. Each of the arms has a measurement roller on one end which is brought into contact with the inner surface of a hollow cylinder to be measured and which can be rolled thereon, if necessary. An instrument platform is attached to the spacer device so that a light emitter (e.g., laser) and/or receiver or reflector can be attached at the central position of the instrument platform. The device is used to determine the three-dimensional position of the hollow cylinder to be measured.
Claims10
Spacer device for measurement of the position of hollow cylinders, comprising an arrangement of exactly three arms each of which is coupled to the other two arms and which can be moved relative to one another, and at least one measurement wheel or roller attached to an end of each arm and having a radially directed rolling surface for making contact with an inner surface of a hollow cylinder to be measured, and fastening devices for mounting at least one of an instrument platform and a means for emitting or receiving light beams or an optical component.
Dependencies are inferred from the claim text.