首页>
外国专利>
Ultrasonic pulse metal defect detector - indicates position, dimensions and type of internal defects
Ultrasonic pulse metal defect detector - indicates position, dimensions and type of internal defects
展开▼
机译:超声波脉冲金属缺陷检测器-指示内部缺陷的位置,尺寸和类型
展开▼
页面导航
摘要
著录项
相似文献
摘要
The defects can be located in various depths and are determined non-destructively. The operational amplifier of the appts. contains a capacitor which forms a control signal. The capacitor is connected to the amplifier of the receiver of the reflected signals for compensating the losses which are caused by the dispersion and the dying out of the supersonic oscillations. A current generator which is connected to the capacitor has a variable internal resistance and comprises a positive AC feedback. It serves one of the stages of the operational amplifier.
展开▼