Laser Interferometer Non-Contact Oscillation Measurement
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Solution Overview
Problem
Existing methods for non-contact oscillation measurements, such as those using laser interferometers, are inefficient due to the need for individual point-by-point measurement, which slows down the process and introduces precision errors, especially when measuring objects with complex geometries or high-frequency vibrations.
Innovation Solution
The method involves aligning a laser interferometer with a known point on the object and using coordinate transformation to determine its position for arbitrary measuring positions, allowing for direct calculation and display of the interferometer's position in the object's reference system, thereby reducing the number of necessary alignments and increasing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual point-by-point measurement is performed sequentially, then measurement precision is maintained, but measurement time increases significantly
Solution Approach 1:
The patent combines multiple measuring beams from a single laser interferometer to measure multiple measuring points simultaneously. The laser interferometer emits at least two measuring beams that are directed to different measuring points on the object at the same time, allowing parallel measurement of multiple points while maintaining precision through coordinate transformation calculations.
Solution Approach 2:
The patent employs dynamic coordinate transformation to calculate the positions of multiple measuring points in the object's reference system based on the laser interferometer's position and orientation. This dynamic calculation approach allows simultaneous processing of multiple measuring points without sacrificing measurement precision, resolving the time-precision tradeoff.
2Productivity
If multiple measuring beams are emitted simultaneously to multiple measuring points, then productivity increases, but device complexity increases
Solution Approach 1:
The patent makes a single laser interferometer perform multiple functions by enabling it to emit multiple measuring beams simultaneously to different measuring points. This multi-functionality allows one device to replace what would traditionally require multiple separate measuring instruments, increasing productivity without proportionally increasing device complexity.
Solution Approach 2:
The patent introduces a control unit as an intermediary that manages the complex coordination of multiple measuring beams. The control unit handles the emission of multiple beams, receives reflected beams from multiple points, and performs coordinate transformations, thereby simplifying the overall system architecture while enabling simultaneous multi-point measurement.
3Measurement precision
If manual positioning and alignment is performed for each measuring point, then measurement precision is maintained, but labor and time requirements increase
Solution Approach 1:
The patent implements an automated system where the laser interferometer's position and orientation are automatically determined, and measuring beams are automatically directed to multiple measuring points without manual intervention. The control unit autonomously performs coordinate transformations and calculates measuring point positions, eliminating the need for manual positioning and alignment while maintaining measurement precision.
Solution Approach 2:
The patent replaces manual mechanical positioning and alignment operations with automated optical and computational methods. Instead of manually positioning the laser interferometer and aligning beams to each measuring point, the system uses coordinate transformation calculations and automated beam control to achieve the same measurement precision with significantly improved ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly accelerates and improves the precision of oscillation measurements by minimizing the need for manual positioning and allowing for automated scanning, reducing the time and labor required for comprehensive oscillation measurements while maintaining high accuracy.
Implementation Method 1
at least one laser interferometer having a measuring beam emitter and a detector for the measuring beam reflected by the object
Implementation Method 2
If the object is made to vibrate the surface of this object executes an oscillating motion, with the frequency of the light of the laser interferometer reflected by the surface of the object changing due to the Doppler Effect
Data Source
AI summary
A method and a device for non-contact vibration measurement of an object. Method steps include: Moving at least one laser interferometer, which emits at least one measuring beam to at least one measuring point on the object, detecting the measuring beam reflected by the object, determining the vibration data from the emitted and reflected measuring beam, allocating the vibration data to the measuring point, as well as evaluating the vibration data and displaying the vibration data of the measuring point, with at least one comparison of a position of the laser interferometer being performed using at least one position of a known freely predetermined point on the object and a transformation rule being prepared to determine the position of the laser interferometer in reference to the object for arbitrary measuring positions based on the comparison. The device for measuring vibrations is also disclosed.