Note: oscilloscope not included
Simple, stable, and reliable
Ideal for bio/medical physics teaching
Ultrasonic wave refers to the frequency of an electromagnetic wave higher than the upper hearing limit of a human. 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.
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
|Pulse voltage||450 V|
|Output pulse width||< 5 μs|
|Detection blind area||< 0.5 cm|
|Detection depth||<100 cm in water|
|Ultrasonic transducer probe||integrated transmitter/receiver, frequency 2.5 MHz|
|Cylindrical samples||aluminum alloy, crown glass, and plastic|
|Block for resolution test|
|Sample for defect detection|
Schematic of type-A ultrasound diagnosis
Simulation of ultrasound diagnosis of human organ