Lab Equipment for Teaching Physics

Note: oscilloscope not included

Features

• High performance

• Simple, stable, and reliable

• Ideal for bio/medical physics teaching

  
  

Introduction

Ultrasonic waves refer to sound waves with frequencies higher than the upper hearing limit of the human ear. Ultrasonic technology is widely used as a nondestructive detection method. It is based on the propagation property of an ultrasonic wave in a medium as impacted by the material itself or the internal defects in the material. It can detect the size, shape, and distribution of defects inside a material or on the surface of a material (such as cracks, inclusions, defective fusions). Ultrasonic detection offers high sensitivity, strong penetrability, and is able to probe heavy forgings.

A-scan is an amplitude-modulated one-dimensional scan which can be used to detect the presence of flaws in materials, while B-scan is a two-dimensional, cross-sectional view of an object, also called brightness scan.

This apparatus is an experimental demonstration instrument based on A-scan ultrasonic pulse-echo technology. It can demonstrate the working principle of a medical ultrasonic diagnostic instrument or an industrial ultrasonic flaw detector. The instruction manual contains comprehensive materials including experimental configurations, principles, step-by-step instructions and some experimental results. Please click Experiment Theory and Contents to find more information about this apparatus.

Using this apparatus, the following experiments can be performed:

1. Measurement of the sound velocity in water or the thickness of a water layer.

2. Simulative measurement of the thickness of a human organ.

3. Determination of the resolution of the apparatus.

4. Measurement of the thickness of a solid object and test of the internal defects in a sample under test.

Main Parts and Specifications