ultrasonic frequency

The time frequency difference between grain noise and defect signal provide a possibility for enhancement of signal-to-noise ratio ( SNR) in ultrasonic testing.

晶粒噪声和缺陷信号的时频特征的差异，为提高超声检测的信噪比提供了可能。

Technology and System Based on Time-Frequency Analysis for Ultrasonic Testing of Coarse Grain Materials

基于时频分析的粗晶材料超声检测技术与系统

Segmentation of Ultrasonic Image Using Getting Optimal Threshold by Frequency field Analysis

用频域分析最佳阈值的方法进行超声医学图像分割

Ultrasonic Frequency Quenching for Guideway Face of Lathe Bed by Self-made Quenching Car

自制淬火车实现床身导轨面超音频淬火

Radio frequency ultrasonic technique for metal brazed high-density honeycomb structures and defect recognition are described.

利用射频超声技术检测大密度金属钎焊蜂窝构件及缺陷识别技术.

The relations of ultrasonic motor output characteristics and drive frequency are nonlinear.

超声波电机的输出特性与驱动频率呈非线性关系.

Moreover, the requirements of the ultrasonic vaporation of liquid to ultrasonic intensity and frequency were introduced.

本文进一步分析了液体超声蒸发对超声声强和频率的要求.

In this paper, the thickness vibration of the piezoelectric ceramic stack consisting of a number of identical piezoelectric ceramic thin rings is analyzed and its electro-mechanical equivalent circuit is obtained. The resonance frequency equation for the sandwich piezoelectric ceramic ultrasonic transducer in thickness vibration is derived.

对压电陶瓷晶堆的厚度振动进行了分析，得到了机电等效电路，推导了共振频率方程。

Methods: ATL HDI 5000 ultrasonic system with L 12 5 superwide frequency transducer was available.

方法: 采用ATLHDI5000超声诊断仪,L125超宽频探头.

Pulse rate ( frequency ) is optimized in ultrasonic area, generates cavitated action in liquid accordingly.

脉动速率 ( 频率 ) 优选在超声区域内, 借此在液体中出现空化作用.

Ultrasonic frequency pulse tungsten inert gas welding power source topology and welding applicability

超音频脉冲TIG焊电源拓扑及电弧焊适用性