Design of a Low Cost Laser Vibrometer System
Malahs, Matiss (2015)
Malahs, Matiss
Metropolia Ammattikorkeakoulu
2015
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201504295381
https://urn.fi/URN:NBN:fi:amk-201504295381
Tiivistelmä
The aim of this study was to develop a functional low cost laser vibrometer system capable of measuring the vibrational frequency of an object. The thesis explains the underlying operational principles of commercially available laser vibrometers, and based on the research a functional system is developed.
The development of the system consisted of three main parts - sensor part, analog signal analysis and digital signal processing. In the study emphasis was put on the development of the sensor part and analog signal analysis, while the digital signal processing was done using "NI myDaq" hardware and "LabView" software. The system design was divided into smaller subsections where the design of each part of the system was analysed and discussed in more detail.
An operational system capable of detecting vibrational frequency of an object with a laser beam was developed, thus fulfilling the objective of thesis. The system was thoroughly tested in several measurement setups to determine the operational limits and maximum detectable vibrational frequency. While there is a number of possible future improvements and additional tests should be carried out, the system is fully capable of detecting vibration of an object remotely and non-intrusively.
The development of the system consisted of three main parts - sensor part, analog signal analysis and digital signal processing. In the study emphasis was put on the development of the sensor part and analog signal analysis, while the digital signal processing was done using "NI myDaq" hardware and "LabView" software. The system design was divided into smaller subsections where the design of each part of the system was analysed and discussed in more detail.
An operational system capable of detecting vibrational frequency of an object with a laser beam was developed, thus fulfilling the objective of thesis. The system was thoroughly tested in several measurement setups to determine the operational limits and maximum detectable vibrational frequency. While there is a number of possible future improvements and additional tests should be carried out, the system is fully capable of detecting vibration of an object remotely and non-intrusively.