【摘要】 传统冲击弹性波检测仪校准依赖固定参数的猝发音信号源，难以模拟实际工程中复杂的弹性波叠加现象，无法满足JJF 1969-2022校准规范中的多模态校准需求。因此，本文提出了一种基于可编程硬件的，可实现连续猝发音信号生成的校准装置。实验表明，该装置可实现4组猝发音的任意组合输出，幅值误差≤0.4%、频率误差≤0.02%、时间间隔误差≤0.04%,满足JJF 1969-2022校准规范对级线性、声时及重复性的校准要求，对提高水利、工业与民用建筑、道路桥梁等的安全性具有重要的现实意义。更多还原

【Abstract】 The calibration of traditional shock elastic wave detector relies on the burst signal source with fixed parameters, which is difficult to simulate the complex elastic wave superposition phenomenon in practical engineering, and can not meet the multimodal calibration requirements in JJF 1969-2022 calibration specification.Therefore, this paper proposes a calibration device based on programmable hardware, which can realize continuous burst signal generation.Experiments show that the device can achieve any combination of four groups of burst output, with amplitude error ≤ 0.4%,frequency error ≤ 0.02%,and time interval error ≤ 0.04%,meeting the calibration requirements of JJF 1969-2022 calibration specification for level linearity, sound time and repeatability.The device has important practical significance to improve the safety of water conservancy, industrial and civil buildings, roads and bridges.更多还原