Lab Equipment for Teaching Physics

Note: oscilloscope not included

Features

• High performance

• Simple, stable, and reliable

• Ideal for bio/medical physics teaching

  
  

Introduction

The LEAI-90 Apparatus is designed to demonstrate the principles and applications of A-scan ultrasonic technology. Ultrasonic waves, with frequencies above the audible range for humans, are widely used in nondestructive testing (NDT) for material inspection, medical diagnostics, and industrial applications. This apparatus uses pulse-echo A-scan technology to detect internal material flaws, thickness measurements, and more.

Ultrasonic technology works by sending sound waves into a material and analyzing the reflected waves to detect internal defects, such as cracks, inclusions, or voids. It is particularly useful for evaluating heavy materials and can penetrate thick structures. A-scan refers to the one-dimensional amplitude-modulated scan, primarily used to detect flaws, while the B-scan provides a two-dimensional cross-sectional view of the object being tested.

The LEAI-90 provides hands-on experience for students to study both medical ultrasonic diagnostic instruments and industrial ultrasonic flaw detectors. 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 Sound Velocity and Water Layer Thickness:

   Students can measure the sound velocity in water or the thickness of a water layer. This experiment is crucial for understanding how sound waves propagate through different media.

2. Simulative Measurement of Human Organ Thickness:

   Using the A-scan technology, students can simulate the measurement of the thickness of human organs, similar to medical diagnostic ultrasound devices, enhancing their understanding of medical imaging techniques.

3. Determination of Resolution:

   Students can determine the resolution of the ultrasonic system, allowing them to understand how fine the measurements are and how small defects can be detected.

4. Measurement of Solid Object Thickness & Internal Defect Testing:

   The apparatus can also measure the thickness of solid objects and test for internal defects such as cracks, voids, or inclusions. This is essential for evaluating material quality in manufacturing or construction.

Main Parts and Specifications