Category : Measurement, test and control instrumentations > Dimensional measurements 2D/3D

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Stereoscopic Width Gauge

Application:
The Stereoscopic Width Gauge DigiScan XD4000, designed for installation above the mill roll tables in hot strip and plate mills and cold rolling mills, is state-of-the-art technology for measuring the width of strip / plate products. For use at the roughing mill or finishing mill exit, the self-emitted opvaligntical radiation of the hot strip provides sufficient contrast for width determination. An optional backlight mode is available for installation at the entry to the coilers or when the rolling temperatures are below 650°C.

Introduction:

The core of the DigiScan XD4000 consists of proprietary software operating on a high performance frame grabber and two 4096 pixel CCD (Charge Coupled Device) high performance digital cameras.

Working Principle:
DELTA Stereoscopic Width Gauge employs an advanced digital edge detection process that captures the digitized camera data. Software routines running on the high speed embedded processor perform sub-pixel edge determination in two dimensional space.
The camera data are filtered using a high-speed Infinite Impulse Response (IIR) digital filter. Sub-pixel edge locations are then determined based on the second derivative of the pixel data. With two sub-pixel edges from each camera, the true width of the material is calculated using geometric triangulation. These trigonometric functions allow very accurate width measurement in spite of the influences of material pass line variations, thickness variations and flutter.

Special Features:
- Two digital CCD cameras with 4096 pixels each and high-quality multi-lens optics, mounted on a precision optical bed in stereoscopic vision;
- Advanced edge detection software and data capture processor to perform edge sensing in real-time at 2000 Hertz;
- 40MHz High Speed digital camera;
- High speed CPU executing digital filtering algorithms to determine edges location with sub-pixel accuracy and to calculate product width;
- Simplicity of installation and maintenance;
- Very quick change of sensor head;
- Compact water cooled sealed die-cast aluminium housing;
- Modular architecture allowing easy extension and implementation of effective solutions with end users;
- Client Server architecture with multiple displays on a network;
- Remote dial up Access Service through network for trouble shooting;
- Laser line pointer for easy commissioning;
- Self emitted or back light mode;
- Optional features include – Thermal profile for self emitted Gauges;

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List of all articles in this sub-category Dimensional measurements 2D/3D

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