Auto Transformer Leakage Inductance Reduction Ultrasonic Probe
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Solution Overview
Problem
Conventional ultrasonic diagnostic devices experience deterioration in high-frequency characteristics and receiving sensitivity due to large leakage inductance in transformers with separated primary and secondary coils, limiting the high-frequency band and degrading image quality.
Innovation Solution
The use of an auto transformer with low leakage inductance, which transforms the reception signal at various boosting ratios based on control signals, reduces the influence of leakage inductance and maintains high-frequency characteristics, thereby enhancing receiving sensitivity and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transformer with separated primary and secondary coils is used to boost the reception signal, then receiving sensitivity is improved, but leakage inductance increases causing high-frequency characteristics to deteriorate
Solution Approach 1:
The patent merges the primary and secondary coils into a single integrated transformer structure, eliminating the separation that causes leakage inductance. This unified coil design maintains the signal boosting function while removing the source of high-frequency deterioration, directly resolving the contradiction between receiving sensitivity and high-frequency characteristics.
Solution Approach 2:
The patent changes the inductance parameters by optimizing the coil winding structure and adjusting the transformation ratio to achieve the desired signal boost without excessive leakage inductance. This parameter optimization allows the transformer to maintain both receiving sensitivity and high-frequency performance.
2Power
If the high-frequency band is limited due to leakage inductance, then receiving sensitivity deteriorates, but using a transformer with separated coils provides signal boosting
Solution Approach 1:
By combining the primary and secondary coils into a single transformer unit, the patent eliminates the leakage inductance that limits the high-frequency band. This merged structure enables the system to achieve both effective signal boosting and maintained receiving sensitivity across a wider frequency range.
Solution Approach 2:
The patent optimizes the transformation ratio and inductance values to achieve the necessary signal boosting while minimizing leakage inductance effects. This parameter tuning allows the system to maintain receiving sensitivity even with the signal amplification function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution prevents deterioration in high-frequency characteristics and receiving sensitivity, allowing for improved image quality even with high-frequency probes, while also reducing the size and cost of the reception circuitry.
Implementation Method 1
a transformer in which a primary coil and a secondary coil are separated boosts the reception signal at a predetermined boosting ratio
Implementation Method 2
an ultrasonic probe transmits ultrasonic waves to a subject and converts reflection waves reflected by the subject to a reflection wave signal
Data Source
AI summary
An ultrasonic diagnostic device according to an embodiment includes an ultrasonic probe and transformer circuitry. The ultrasonic probe transmits ultrasonic waves to a subject and converts reflection waves reflected by the subject to a reflection wave signal. The transformer circuitry includes an auto transformer that transforms the reflection wave signal at a transformation ratio in accordance with a control signal based on information related to the ultrasonic probe among a plurality of transformation ratios.