Abstract
Abstract The following article describes the development of a millimetre wave based real-time imaging system for three dimensional non-destructive testing of goods. For this purpose a rotating antenna is used which is fed from an FMCW radar. The received measuring data is processed with a SAR algorithm. Due to the fact that a reflexive measurement method is used, the integration of the system into existing systems is simplified. To make the computing power-intensive SAR image processing possible, the complete signal processing chain of the image processing is executed on the graphics card. The article elucidates the concept for calculating the measurement parameters which have to be elaborated for the implementation of the image processing of the whole system.
Highlights
Reliable and efficient quality controls are essential in the production of a huge variety of goods
The following article describes the development of a millimetre wave based real-time imaging system for three dimensional non-destructive testing of goods
The largest GPU array of the implementation is the look up table which includes the voxel mask and the distances to be analysed for each voxel
Summary
Reliable and efficient quality controls are essential in the production of a huge variety of goods. Millimetre waves depict the range from 30 GHz to 300 GHz of the electromagnetic spectrum and can be used for various inspection tasks of different goods (see [1]). They are able to penetrate plastics, wood, glass and other materials with a low relative permittivity (εr). An advantage of millimetre waves in comparison to X-ray is the non-ionising radiation. In this case no special protection for the user is necessary during the operation. In comparison to optical methods millimetre waves can penetrate and examine non-transparent materials. In order to enable three-dimensional imaging and to simplify the mechanical concept, the whole setup of the “SAMMI” scanning system is modified
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