Target Detectability Using Coded Acoustic Signal in Indoor Environments

Target Detectability Using Coded Acoustic Signal in Indoor Environments
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在室内环境中使用编码声学信号进行目标探测

DOI:
10.1143/jjap.47.4325
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发表时间:
2008
影响因子:
1.5
通讯作者:
H. Hachiya
H. Hachiya
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
H. Matsuo;Tadashi Yamaguchi;H. Hachiya

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空气中的声学方法有可能快速准确地表征空气中的物体。然而,由于环境噪声和信号在物体表面上的散射,很难清楚地识别声信号。因此,需要建立能够在空气中进行测量的传感系统。在本文中,我们提出了在室内环境中使用M序列信号的目标检测。通过使用M序列信号,能够提高信噪比(SN),并且能够稳定地测量使用常规脉冲无法检测到的反射波。噪声和混响分量包括在接收信号和来自目标的反射波中。我们证实,在高阶M序列信号的情况下,目标的可检测性是有限的混响。另外,在混响受限的情况下,我们使用没有目标的信号从接收信号中消除混响分量,并确定目标的反射特性。
An acoustic method in air has the potential to allow for the fast and accurate characterization of objects in air. Nevertheless, it is difficult to identify acoustic signals clearly because of environmental noises and the scattering of signals on the object surface. Therefore, it is required to establish a sensing system, which enables measurements in air. In this paper, we present the object detection using an M-sequence signal in an indoor environment. Using the M-sequence signal enabled the improvement in signal-to-noise (SN) ratio and the stable measurement of reflected waves that cannot be detected using a conventional impulse. The noise and reverberation components are included in the received signals and reflected waves from the target. We confirmed that in the case of a high-order M-sequence signal, target detectability is limited by reverberation. In addition, we eliminated the reverberation component from the received signals using the signals without the target in the reverberation limited case and determined the reflection characteristics of the target.
使用扬声器实现超声波风速计的简单技术
DOI: --
发表时间: 2005
期刊: Japanese Journal of Applied Physics Vol.44, Part 1, Mo. 6B
影响因子: --
作者:
Kousuke Kudo;Koichi Mizutani and Kazuya Itoga
通讯作者: Koichi Mizutani and Kazuya Itoga
DOI: --
发表时间: 2005
期刊:
影响因子: --
作者:
Satoshi Kawabe;Koichi Mizutani
通讯作者: Koichi Mizutani
使用针孔的超越衍射极限的低频空气耦合超声系统
DOI: --
发表时间: 2006
期刊: Jpn. J. Appl. Phys 45・5B
影响因子: --
作者:
K.Sasaki;M.Nishimura;K.Imano
通讯作者: K.Imano