The development of the measurement method for a structural intensity with with a K-space signal processing
K空间信号处理结构强度测量方法的研制
基本信息
- 批准号:06452138
- 负责人:
- 金额:$ 2.88万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (B)
- 财政年份:1994
- 资助国家:日本
- 起止时间:1994 至 1995
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The Purpose of this research is to establish the practical technique of structural intensity measurement. In this study, the k-space signal processing and ultrasonic Doppler vibrometer array for structural intensity measurement have been proposed. We have obtained the following results.1.K-space method The derivation of structural intensity defined as vibration energy flow in solid structure contains the higher order spatial derivatives of displacement for flexural vibration. This calculation has a large effect on the measurement accuracy. In the proposed method, there are some merits that the spatial derivatives can be estimated only by the simple arithmetic in k-space using spatial Fourier transformation and that vibration noise can be reduced by k-space filtering. In order to avoid the loading effect on the specimen, a laser Doppler vibrometer was used which is one of the most promising candidates. We obtained the important result that the cutoff wave number for k-space filtering should be one and a half of the wave number of the measured vibration to minimize the influence of error in the measured data. This result was confirmed by the experiments for a beam and 2-dimensional plate.2.Ultrasonic Doppler transducer array We proposed a new probe for structural intensity measurement using ultrasonic Doppler method. This probe is suitable to make a large array system, since the ultrasonic system is to easy handle and cheaper than the optical one and has no loading effect to specimens. The array probes for 1-dimensional and 2-dimensional measurements were made. The usable range of these array is 3 mm/s-1.0m/s at vibration frequency 1 kHz. The validity of the ultrasonic transducer array using Doppler effect is confirmed experimentally by the 1-dimensional and 2-dimensional structural intensity measurements.
本研究的目的是建立实用的结构强度测量技术。本研究提出了一种用于结构强度测量的k空间信号处理和超声多普勒测振仪阵列。得到了以下结果:1. K空间法将结构强度的导数定义为固体结构中的振动能量流,其中包含了弯曲振动位移的高阶空间导数。这种计算对测量精度有很大的影响。该方法的优点是利用空间傅里叶变换,只需在k空间进行简单的运算即可估计出空间导数,并通过k空间滤波来降低振动噪声。为了避免加载对试样的影响,使用了激光多普勒振动计,这是最有前途的候选人之一。我们得到的重要结果,k空间滤波的截止波数应是被测振动波数的1.5,以尽量减少测量数据中的误差的影响。通过梁和二维平板的实验验证了这一结论。2.超声多普勒换能器阵列提出了一种利用超声多普勒方法测量结构强度的新探头。由于超声系统比光学系统便宜、操作方便、对试样无加载效应,因此该探头适合于制作大阵列系统。制作了用于一维和二维测量的阵列探针。在振动频率为1 kHz时,该阵列的工作范围为3 mm/s-1.0m/s。通过一维和二维结构强度的测量,证实了利用多普勒效应的超声换能器阵列的有效性。
项目成果
期刊论文数量(28)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Ryusuke Morikawa: "Error Evaluation of the Structural Intensity Measured with a Scanning Laser Doppler Vibrometer and a K-space Signal Processing (to be published)" The Journal of the Acoustical Society of America.
Ryusuke Morikawa:“用扫描激光多普勒振动计和 K 空间信号处理测量的结构强度的误差评估(待出版)”美国声学学会杂志。
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Kentaro Nakamura and Sadayuki Ueha: "Structural Intensity Measurements by and Optical Fiber Array Probe" Proceedings of Inter-Noise 94. 1689 (1994)
Kentaro Nakamura 和 Sadayuki Ueha:“光纤阵列探头的结构强度测量”Inter-Noise 94. 1689 (1994) 论文集
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Kentaro Nakamura, Sadayuki Ueha and Hajime Fujita: "A Fiber Optic Vibrometer Array for Structural Intensity Measurements" Proceedings of Inter-Noise 95. 641 (1995)
Kentaro Nakamura、Sadayuki Ueha 和 Hajime Fujita:“用于结构强度测量的光纤振动计阵列”Inter-Noise 95. 641 (1995) 论文集
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- 影响因子:0
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Ryusuke Morikawa: "Structural Intensity Derivation Using Normal and In-Plane Vibration Displacements Measured By A Laser Doppler Vibrometer" Proceedings of Inter-Noise 95. 637-640 (1995)
Ryusuke Morikawa:“使用激光多普勒振动计测量的法向和面内振动位移进行结构强度推导”Proceedings of Inter-Noise 95. 637-640 (1995)
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- 影响因子:0
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Kentaro Nakamura: "Structural Intensity Measurements by an Optical Fiber Array Probe" Proceedings of Inter-Noise 94. 1689-1692 (1994)
Kentaro Nakamura:“光纤阵列探头的结构强度测量”Proceedings of Inter-Noise 94. 1689-1692 (1994)
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UEHA Sadayuki其他文献
UEHA Sadayuki的其他文献
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{{ truncateString('UEHA Sadayuki', 18)}}的其他基金
Exploring the Mechanism of Friction and Wear of Ultrasonic Motors.
探索超声波电机摩擦磨损的机理。
- 批准号:
11555076 - 财政年份:1999
- 资助金额:
$ 2.88万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Development of the estimation method of energy flow path inside the 3-dimensional structure using surface velocity data and finite element method
利用表面速度数据和有限元方法开发 3 维结构内部能量流路径估计方法
- 批准号:
10450034 - 财政年份:1998
- 资助金额:
$ 2.88万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
A new method for measuring the structure and strength of anisotropic composite material using ultrasonic waves
超声波测量各向异性复合材料结构和强度的新方法
- 批准号:
08455309 - 财政年份:1996
- 资助金额:
$ 2.88万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
The development of a small size ultrasonic motor for precise and high-speed positioning control
开发用于精密高速定位控制的小型超声波电机
- 批准号:
05555023 - 财政年份:1993
- 资助金额:
$ 2.88万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)