基于强方波脉冲发射技术的大直径石墨棒的超声检测

详细信息

Ultrasonic Inspection of Large-diameter Graphite Rod by High Square-wave Pulse Emission Technology

1. Electric Power Science Research Institute of National Grid Xinjiang Electric Power Company, Urumqi 830011, China;
2. Guangzhou Doppler Electronic Technologies Co., Ltd., Guangzhou 510663, China

摘要: 基于强方波脉冲发射技术，配合高增益高信噪比接收放大器、高速低功耗数字处理系统以及专用低频探头，对大直径石墨棒进行超声穿透法检测。结果表明：采用强方波脉冲发射技术对小厚度(50 mm以下)石墨件检测时，灵敏度余量比配合普通超声探头的超声检测仪高55 dB，可解决普通超声检测仪无法检测340 mm左右直径石墨棒的难题。
- 强方波脉冲发射 /
- 石墨棒 /
- 超声检测
Abstract: A research was performed on high square-wave pulse emission technology. Together with high-gain high signal-noise ratio amplifier, high-speed low-power consumption digital processing system and dedicated low-frequency probes, large-diameter graphite rod was inspected by ultrasonic through-transmission method. Comparision test was carried on using common ultrasonic flaw detector with low-frequency ordinary probe. The result shows that: using this new technology, the surplus sensitivity is two times of normal ultrasound method while using this new technology; and the 340mm large diameter graphite rod inspection problems are successful resolved.
- High square-wave pulse emission /
- Graphite rod /
- Ultrasonic inspection

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