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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Vision-Aided Laser Doppler Vibrometry for Remote Automatic Voice Detection
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Vision-Aided Laser Doppler Vibrometry for Remote Automatic Voice Detection

机译：视觉辅助激光多普勒测振仪，用于远程自动语音检测

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摘要

For automating the remote voice detection using a laser Doppler vibrometer (LDV), we integrate a pan–tilt–zoom (PTZ) camera, a mirror, and a pan–tilt unit (PTU) with the LDV to form a multimodal sensing system. With the assistance of vision and active control components, the LDV can automatically select the best reflective surfaces, point the laser beam to the selected surfaces, and quickly focus the laser beam. For accomplishing these functions, distance measurement and sensor calibration methods are proposed using the triangulation between the PTZ camera and the mirrored LDV laser beam. Based on both the measured distances and the return signal levels of the LDV, a fast and automatic LDV focusing algorithm is designed. Furthermore, strategies and related image-processing techniques in surface selection and laser pointing are designed. Experimental results are shown to validate the performance improvement of the LDV in remote automatic voice detection by using the multimodal system.
机译：为了使用激光多普勒振动计（LDV）自动进行远程语音检测，我们将平移-倾斜-变焦（PTZ）摄像机，反光镜和平移-倾斜单元（PTU）与LDV集成在一起，以形成多模式传感系统。在视觉和主动控制组件的帮助下，LDV可以自动选择最佳的反射表面，将激光束指向所选的表面，并快速聚焦激光束。为了实现这些功能，提出了使用PTZ摄像机和镜像的LDV激光束之间的三角测量的距离测量和传感器校准方法。基于测得的距离和LDV的返回信号电平，设计了一种快速，自动的LDV聚焦算法。此外，还设计了表面选择和激光指向中的策略和相关的图像处理技术。实验结果表明，通过使用多模式系统，可以验证LDV在远程自动语音检测中的性能改进。

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