Position detection of small objects in indoor environments using coded acoustic signal
Position detection of small objects in indoor environments using coded acoustic signal
复制标题
使用编码声学信号检测室内环境中小物体的位置
DOI：
10.1250/ast.29.15
复制
发表时间：
2008
影响因子：
0.7
通讯作者：
H. Hachiya
中科院分区：
文献类型：
--
作者：
K. Nishihara;Tadashi Yamaguchi;H. Hachiya
可以在空气中使用的声学方法有可能允许对空气中的物体进行快速和准确的表征。然而，由于环境噪声和物体表面的声音散射，很难清晰地识别来自小物体的声信号。因此，必须开发一种能够测量空气中微小物体的传感系统。在这项研究中，我们使用一个M序列信号和接收信号的相位信息在嘈杂的室内环境中对尺寸与声音波长相当的小物体进行定位。使用M序列信号，我们能够改善信噪比，并以稳定的方式测量使用常规脉冲无法检测到的反射波。利用到达方向信息从楼层或天花板的杂波中提取目标反射的信号。利用M序列信号和到达方向信息，能够对室内环境中的小目标进行位置检测。
An acoustic method that can be used in air has the potential to allow for a fast and accurate characterization of objects in air. Nevertheless, it is difficult to identify acoustic signals from small objects clearly because of environmental noise and the scattering of sound on the object surface. Therefore, a sensing system that enables the measurement of small objects in air must be developed. In this study, we performed the localization of small objects of size comparable to the sound wavelength using an M-sequence signal and the phase information of received signals in a noisy indoor environment. Using the M-sequence signal, we are able to improve the SN ratio and to measure in a stable manner the reflected waves that cannot be detected using a conventional impulse. The arrival direction information was used to extract signals reflected by targets from unwanted signals of the floor or ceiling. Using an M-sequence signal and the arrival direction information, the position detection of small objects in the indoor environment was enabled.
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