Shop : Details
Shop
Details
45,80 €ISBN 978-3-8440-7237-2Softcover132 pages66 figures194 g21 x 14,8 cmEnglishThesis
March 2020
Hao Zhang
Laser Interference Sensor for 4D Shape and Vibration Measurement with Camera Based Uncertainty Reduction
Absolute shape and vibration measurements of rotating workpieces and cutting tools in CNC machines are significant for machine operation optimizations and thereby for improving the machining accuracy. Simultaneous distance and velocity measurements enable absolute 3D shape measurements of fast rotating workpieces for instance for monitoring the cutting process in a lathe. The laser Doppler distance sensor with phase evaluation (PLDDS) enables simultaneous distance and velocity measurements with a single sensor head by evaluating the scattered light signals. However, superposed speckle signals, temperature drifts and mechanical scanning result in an increased velocity, distance and shape uncertainty.
To overcome above drawbacks, in this dissertation a novel camera based PLDDS is realized. It can separate the speckle signals for the velocity and distance evaluations to reduce the speckle noise. A fringe spacing calibration method that can be conducted in-situ is realized to eliminate the fringe spacing uncertainty resulting from temperature drifts. Coherent fiber bundles are employed for the first time to forward the scattered light towards the cameras. This removes the cameras from the sensor head and therefore enables a compact and passive sensor head with keyhole access. Furthermore, the flexible applications of 4D shape measurement without sensor scanning and bidirectional tool tip vibration measurements with only one sensor head are achieved, which can be used for the machine operation optimization in the industry.
To overcome above drawbacks, in this dissertation a novel camera based PLDDS is realized. It can separate the speckle signals for the velocity and distance evaluations to reduce the speckle noise. A fringe spacing calibration method that can be conducted in-situ is realized to eliminate the fringe spacing uncertainty resulting from temperature drifts. Coherent fiber bundles are employed for the first time to forward the scattered light towards the cameras. This removes the cameras from the sensor head and therefore enables a compact and passive sensor head with keyhole access. Furthermore, the flexible applications of 4D shape measurement without sensor scanning and bidirectional tool tip vibration measurements with only one sensor head are achieved, which can be used for the machine operation optimization in the industry.
Keywords: interferometry; signal and image processing; speckle effect; coherent fiber bundle; in-situ shape and vibration measurement; dynamic behavior
Dresdner Berichte zur Messsystemtechnik
Edited by Prof. Dr.-Ing. habil. Jürgen Czarske, Dresden
Volume 15
Available online documents for this title
DOI 10.2370/9783844072372
You need Adobe Reader, to view these files. Here you will find a little help and information for downloading the PDF files.
Please note that the online documents cannot be printed or edited.
Please also see further information at: Help and Information.
Please also see further information at: Help and Information.
| Document |  | Document | ||
| Type |  | |||
| Costs |  | 34,35 € | ||
| Action |  | Purchase in obligation and download the file | ||
| Document |  | Table of contents | ||
| Type | | |||
| Costs |  | free | ||
| Action |  | Download the file | ||
User settings for registered online customers (online documents)
You can change your address details here and access documents you have already ordered.
User
Not logged in
Export of bibliographic data
Shaker Verlag GmbH
Am Langen Graben 15a
52353 Düren
Germany
Am Langen Graben 15a
52353 Düren
Germany
Mon. - Thurs. 8:00 a.m. to 4:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.
Contact us. We will be happy to help you.
