Non-destructive testing and quality control with the x-ray TDI camera from NTB

In the area of non-destructive testing and quality control the x-ray TDI camera is an advancement of NTB’s linescan x-ray cameras. It is the result of an extensive research and development program in the field of digital x-ray imaging. The unsurpassed performance of the TDI camera provides both excellent image quality and high scanning speed at the same time.

How the x-ray TDI camera works

TDI (Time Delay and Integration) is a special sensor technology: The TDI camera does not have only one single line like standard linescan cameras, but instead it has 128 lines. During the scan, the acquired signal of the first line is, synchronously to the movement of the object, passed on to the second line. This process is repeated line by line. In that way, the image information propagates through the sensor, parallel to the object, and each sensor line adds its partial exposure to the image. At the end, each scanned line of the acquired image is accumulated by 128 sensor lines. The accumulation drastically increases the sensitivity of the sensor.

Non-destructive testing with the x-ray TDI camera from NTB

The high sensitivity of the TDI camera results into several benefits: For standard applications, the TDI camera allows the use of cost-saving low-power x-ray sources instead of expensive high-power x-ray sources. Moreover, the TDI camera can satisfy the demands of high end applications, where standard linescan cam-eras fail, because they do not reach a sufficient image quality at the given dose and the required scanning speed.

Long lifetime
A fiber optic protects the sensor of the TDI camera against radiation and thereby guarantees an excellent durability and a considerable lifetime, even at 450 kV. The robust construction of the camera makes it resistant to mechanical damages.

The acquired image data is digitized by 16 bit A/D converters (65536 grey levels) and transmitted to the connected PC. There the images are handled by NTB’s software “iX-Pect”. As an alternative, it is also possible to integrate the camera system into third-party software by the use of the supplied software library (SDK). The SDK allows the development of custom applications, for example for fully automatic data acquisition and defect recognition.