What is the primary function of a pulser in ultrasonic testing?

The primary function of a pulser in ultrasonic testing is to generate the initial energy burst for testing. This energy burst, usually in the form of high-frequency ultrasonic waves, is crucial for initiating the testing process. When the pulser sends out these bursts, they travel through the test material and reflect off any internal features, such as flaws or boundaries.

This initial energy output sets the stage for the entire ultrasonic testing process, as it determines the amplitude and frequency of the waves being sent into the material. Without this pulse generation, there would be no sound waves to interact with the material, making it impossible to assess its integrity using ultrasonic methods.

The other functions listed, such as amplifying signals, filtering noise, or measuring time delays, are performed by different components of the ultrasonic testing system and occur after the initial energy burst has been generated by the pulser.