Abstract

Based on the analysis of information sources, the requirements to the design of high-frequency packet RF-pulse generators for powering capacitance-type transducers are determined. A version of the circuitry of the generator for powering capacitive transducers is developed. The new generator allows creating pulsed peak voltages of more than 1 kV in low-capacitance transducers at frequencies up to 5 MHz with a duration of 1–10 periods of the carrier frequency and sounding frequencies up to 1 kHz. It has been shown experimentally that a prototype of the new generator produces the amplitudes of pulses transmitted through a 20-mm–thick steel sample that are 15.5 times higher than the amplitude of noise received by a miniature piezoelectric transducer. Using the developed powerful voltage-pulse amplifier will allow creating and improving devices for ultrasonic quality control, measurement, and diagnostics of metal products by capacitance-type transducers.

中文翻译：

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用于金属产品的测量，监测和诊断的高频电容式传感器的电源

摘要

在分析信息源的基础上，确定了为电容式换能器供电的高频分组RF脉冲发生器的设计要求。开发了用于为电容式换能器供电的发生器电路的一种形式。新的发生器可以在低电容传感器中以高达5 MHz的频率产生超过1 kV的脉冲峰值电压，持续时间为载波频率的1–10周期和高达1 kHz的探测频率。实验表明，这种新型发生器的原型产生的脉冲幅度是通过20毫米厚的钢样传输的，比微型压电传感器接收到的噪声幅度高15.5倍。