US 9,310,341 B2 · Method and system for three-dimensional vibration measurement using vibrometer

Abstract

Disclosed herein are a system and method for three-dimensional vibration measurement. The method includes measuring vibration components and shape information at a vibration measurement point of a measurement target by sequentially emitting laser beams to the vibration measurement point of the measurement target at each of three measuring positions for measuring vibration of the measurement target; obtaining transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information; measuring angles between unit vectors of respective axes of the local coordinate system and direction vectors of the laser beams emitted with reference to the first to third coordinate systems upon measuring the vibration components; and measuring three-dimensional vibration of the measurement target based on the vibration components and the angles.

Claims15

Dependent claims

A three-dimensional vibration measurement method comprising:

by a distance-measuring device, obtaining shape information of a measurement target by measuring a distance from the measurement target;
by a vibrometer, sequentially emitting laser beams to a vibration measurement point of the measurement target at each of three measuring positions for measuring vibration of the measurement target to measure vibration components at the vibration measurement point;
by the vibrometer, obtaining transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information obtained by the distance-measuring device;
by the vibrometer, measuring angles between unit vectors of respective axes of the local coordinate system and direction vectors of the laser beams emitted with reference to the first to third coordinate systems upon measuring the vibration components;
and
by the vibrometer, measuring three-dimensional vibration of the measurement target based on the vibration components and the angles.

3 more elements

A system for measuring three-dimensional vibration of a measurement target using a single distance-measuring device and a single vibrometer,

wherein the distance-measuring device obtains shape information regarding a vibration measurement point of a measurement target;
and
wherein the vibrometer which measures vibration components at the vibration measurement point by sequentially emitting laser beams to the vibration measurement point of the measurement target at each of three measuring positions, obtains transformation matrices between first to third coordinate systems with respect to each of the measuring positions and a local coordinate system with respect to the vibration measurement point of the measurement target, based on the shape information obtained by the distance-measuring device, measures angles between unit vectors of respective axes of the local coordinate system with reference to the local coordinate system upon measuring the vibration components and direction vectors of the laser beams emitted with reference to the first to third coordinates, and measures three-dimensional vibration of the measurement target based on the vibration components and the angles.

Dependencies are inferred from the claim text.

Method and system for three-dimensional vibration measurement using vibrometer

Life of this patent

Method and system for three-dimensional vibration measurement using vibrometer

Life of this patent

Abstract

Claims15