Focused Ultrasonic Sector Scan

Physical-Chemical Working Principle

Focused ultrasonic sector scanning uses phased array technology. Multiple ultrasonic detectors are arranged in an array and controlled with different delay times. This generates a fan-shaped sound field that is concentrated on a specific area.

Metallurgical Relevance & Welding Risks

This method is particularly useful for detecting irregularly oriented cracks or inclusions in workpieces. It increases the chance of spotting such defects, which improves safety and component life. However, incorrect setup can cause important cracks to be missed or misinterpreted.

Workshop Practice & Instructions

To successfully use focused ultrasonic sector scanning, the following steps must be followed:

1. Array Setup: Set up the phased array correctly and ensure all detectors are working.

2. Delay Times: Adjust the delay times to generate the desired fan-shaped sound field. This can be done via software or manually.

3. Scanning: Perform the scan in the desired direction and distance. Scan the area carefully to detect all possible defects.

4. Evaluation: Analyze the results and compare them with standards or reference data. Flag irregularly oriented cracks or inclusions for further inspection.