Flat panel detector (FPD) is a key equipment in X-ray nondestructive testing, and its working principle involves X-ray conversion and electronic signal processing. This article will introduce in detail the working principle of FPD in X-ray non-destructive testing and explain its importance in modern industrial inspection.
X-ray flat panel detector I. X-ray conversion.
The core function of an FPD is to convert X-rays into a processable electrical signal. During X-ray non-destructive testing, the FPD receives the X-rays produced by the X-ray tube. These X-rays penetrate the object being inspected and interact with the detector material in the FPD. The detector material is usually amorphous silicon (A-Si) or cesium iodide (CSI), etc., which converts X-rays into photons or electrons.
2. Processing of electronic signals.
FPD converts photons or electrons produced by detector material into electrical signals. This process involves optoelectronic devices such as photodiodes or photomultiplier tubes. These optoelectronic devices convert optical signals into electrical signals and analog signals into digital signals through amplifiers and analog-to-digital converters (ADCs). These digital signals represent the X-ray intensity distribution inside the object being inspected and can be processed and analyzed by a computer.
3. Image reconstruction and display.
The digital signal generated by the FPD is processed by an image reconstruction algorithm to form a two-dimensional image of the inside of the object being detected. This process involves techniques such as filtering, interpolation, and noise processing to improve image quality and resolution. Finally, the image is presented to the operator via a display for inspection and analysis.
Fourth, the advantages of FPD in X-ray nondestructive testing.
FPD has many advantages in X-ray non-destructive testing. First of all, FPD has high sensitivity and high resolution, which is able to detect tiny structures and defects. Secondly, FPD has a fast response time and can achieve dynamic detection. In addition, FPD has a lower radiation dose, which helps to protect the safety of the object being detected and the operator.
Daoqing Technology is a fully automatic X-ray flaw detector equipped with a flat panel detector.
5. ConclusionThe working principle of flat panel detector in X-ray nondestructive testing involves the conversion of X-ray and the processing of electronic signals. With the advantages of high sensitivity, high resolution and fast response time, FPD has become an indispensable equipment for modern industrial inspection. With the continuous development of technology, FPD will play a more important role in the field of non-destructive testing in the future.