AD acquisition card is crucial in imaging the whole equipment. Its importance is mainly reflected in the following aspects:

1. Ultrasonic signal acquisition and processing

The scanning acoustic microscope transmits high-frequency ultrasonic waves through a probe and receives ultrasonic signals reflected or transmitted from the sample.

• Importance :

  Data acquisition cards can collect these high-frequency ultrasonic signals in real-time and save them in digital form. The high sampling rate and high resolution of the acquisition card ensure that the details reflecting the internal structure of the sample are not lost.

  • High sampling rate: Captures the high-frequency characteristics of ultrasound signals (usually in tens of MHz to GHz).

  • High resolution: Distinguishes small amplitude changes in reflected signals for high-precision imaging.

2. Signal quality assurance

Noise may be introduced into the ultrasonic signal after amplification, filtering, and other processes.

• Importance :

  High-performance acquisition cards provide excellent signal-to-noise ratio (SNR) and dynamic range, maximizing the restoration of the original characteristics of ultrasound signals, thereby improving image quality.

  

3. Multi-channel synchronous acquisition

Some advanced scanning acoustic microscopes require simultaneous acquisition of multi-channel signals, such as:

• Synchronous operation of multiple ultrasound probes.

• Perform multi-angle scans on complex samples.

• Importance :

  Data acquisition cards provide multi-channel support and can achieve time synchronization between channels to ensure the integrity and accuracy of collected data.

  

4. Real-time data transmission and processing

The large amount of high-frequency signals generated by scanning acoustic microscopes need to be processed and transmitted in real time.

• Importance :

  Data acquisition cards quickly transfer collected data to the host system through high-speed interfaces (such as PCIe and USB 3.0) for subsequent software or hardware processing, thus meeting the needs of real-time imaging and analysis.

5. Resolution and contrast of ultrasound images

The imaging quality of ultrasonic scanning microscopy depends on the precise sampling of ultrasonic signals.

Importance :

The sampling accuracy of the data acquisition card directly affects the resolution and contrast of the image. A data acquisition card with a high bit count (such as 24 bits) and a high dynamic range can capture weak signals and distinguish subtle differences in density or elastic modulus in the sample.

6. Scalable processing of complex data

Modern scanning acoustic microscopes are often combined with AI, machine learning or image processing algorithms for material analysis or defect detection.

• Importance :

  Data acquisition cards can provide high-speed data stream interfaces and work with GPUs or FPGAs to accelerate complex calculations and improve overall system efficiency.

7. Role in application scenarios

• Semiconductor inspection : Collect high-resolution ultrasonic images to detect defects such as cracks and voids inside the chip.

• Material analysis : Analyze the internal structure of composite materials, such as stratification and voids.

• Biomedicine : Imaging the elastic properties of soft tissues or cells.

In conclusion

The data acquisition card is a crucial component in the scanning acoustic microscope system. Its performance directly determines the imaging quality , resolution and analysis accuracy of the microscope . Choosing a high-performance data acquisition card can not only optimize the core functions of the microscope, but also expand its application potential in different fields.