公开(公告)号：EP0995129A4

公开(公告)日：2000-10-18

申请号：EP98936833

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY

Inventor： DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

IPC: F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

CPC classification number: G01S15/88 ,  F41H11/12 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01N2291/014 ,  G01S15/025 ,  G01S15/04 ,  G01V1/001

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

公开(公告)号：WO9904287B1

公开(公告)日：1999-04-01

申请号：PCT/US9814443

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY ,  DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

Inventor： DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

IPC: F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

CPC classification number: G01S15/88 ,  F41H11/12 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01N2291/014 ,  G01S15/025 ,  G01S15/04 ,  G01V1/001

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

Abstract translation: 提供了一种采用具有一个或多个频率的声信号的装置（10），所述声信号用于穿透地面，水或沉积物并使柔顺的埋藏物体（8）振动。 当这些声信号遇到诸如矿山的声学顺应物体（8）时，声信号使柔顺物体（8）振动，导致柔顺物体（8）振动抵抗周围介质的边界，例如地面沉积物 ，产生探测信号的非线性失真，包括产生谐波和具有组合频率的声波（非线性信号）。 这些非线性振动信号由传感器（20）从表面接收。 测得的非线性信号的幅度指示存在声学顺应性物体（8），例如矿山。 本发明还涉及发射电磁RF探测信号和声音或振动信号（调制信号），检测来自掩埋物体（8）的反射电磁信号并处理接收到的信号，识别引起的调制的方法和设备 通过振动。

公开(公告)号：CA2296510C

公开(公告)日：2006-02-07

申请号：CA2296510

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY

Inventor： SUTIN ALEXANDER M ,  DONSKOY DIMITRI M

IPC: G01V3/00 ,  F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/06 ,  G01S13/32 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/74 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

公开(公告)号：CA2296510A1

公开(公告)日：1999-01-28

申请号：CA2296510

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY

Inventor： SUTIN ALEXANDER M ,  DONSKOY DIMITRI M

IPC: F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

公开(公告)号：AU8569598A

公开(公告)日：1999-02-10

申请号：AU8569598

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY

Inventor： DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

IPC: F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

公开(公告)号：AU750725B2

公开(公告)日：2002-07-25

申请号：AU8569598

申请日：1998-07-15

Applicant: STEVENS INST TECHNOLOGY

Inventor： DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

IPC: F41H11/12 ,  G01N29/00 ,  G01N29/11 ,  G01N29/28 ,  G01N29/40 ,  G01N29/46 ,  G01N29/48 ,  G01S13/88 ,  G01S15/02 ,  G01S15/04 ,  G01S15/88 ,  G01V1/00 ,  G01V3/12

Abstract: A device (10) which employs an acoustic signal having one or more frequencies for penetrating into ground, water, or sediments and vibrating a compliant buried object (8) is provided. When these acoustic signals encounter an acoustically compliant object (8) such as a mine, the acoustic signals vibrate the compliant object (8), leading to a vibration of the compliant object (8) against the boundaries of the surrounding medium such as ground sediment, creating a nonlinear distortion of the probing signal including the generation of harmonics and acoustic waves with combination frequencies (nonlinear signals). These nonlinear vibrating signals are received from the surface by a sensor (20). The amplitude of the measured nonlinear signals indicates the presence of an acoustically compliant object (8) such as a mine. The present invention also relates to a method and apparatus which emits an electromagnetic RF probing signal and acoustic or vibration signal (modulating signal), detects the reflected electromagnetic signal from the buried object (8), and processes the received signal, identifying the modulation caused by vibration.

公开(公告)号：AU2572299A

公开(公告)日：1999-08-16

申请号：AU2572299

申请日：1999-01-29

Applicant: STEVENS INST TECHNOLOGY

Inventor： DONSKOY DIMITRI M ,  SUTIN ALEXANDER M

IPC: G01N29/04 ,  G01N29/12 ,  G01H13/00 ,  G01H9/00

Abstract: The invention relates to a method and apparatus for nondestructive testing and evaluation of materials and mechanical structures to determine their integrity reducing contact-type flaws such as cracks, fractures, delamination, unbondings, etc. and also presence of ice on a structure. The invention employs an ultrasonic probing signal and a low frequency vibration applied to a structure tested. In a structure without flaws or ice, these signals propagate independently without any interaction. If the structure contains a defect or ice thereon, the vibration varies the contact area of the defect or ice/structure interface, modulating the phase and amplitude of the higher frequency ultrasonic probing signal passing through the structure. In the frequency domain the result of this modulation manifests itself as sideband spectral components with respect to frequency of the probe wave. This can be considered as a new signal generated by a defect, so that the defect can be detected more easily when such a signal is observed. There are three modes of detection including, vibro-modulation, impact-modulation and self-modulation. The location of defects can be determined in two modes. In a first mode defect is located by moving the low frequency signal about the structure and triggering the high frequency signal immediately after the low frequency signal. Defects can be located in a second mode with a sequence of short burst high frequency signal and a signal-processing algorithm which selects the sequences reflected from various areas of the tested structure. A defect can be quantitatively analyzed by sweeping the high frequency signal over a defined frequency range and measuring, averaging and normalizing the amplitudes of the side bands.

公开(公告)号：CA2319478A1

公开(公告)日：1999-08-05

申请号：CA2319478

申请日：1999-01-29

Applicant: STEVENS INST TECHNOLOGY

Inventor： SUTIN ALEXANDER M ,  DONSKOY DIMITRI M

IPC: G01N29/04 ,  G01N29/12 ,  G01H9/00 ,  G01H13/00

Abstract: The invention relates to a method and apparatus for nondestructive testing and evaluation of materials and mechanical structures to determine their integrity reducing contact-type flaws and presence of ice on a structure. The invention employs an ultrasonic probing signal (30) and a low frequency vibration (20) applied to a structure (8) tested. In a structure without flaws or ice, these signals propagate independently without any interaction. If the structure contains a defect or ice thereon, the vibration varies the contact area of the defect or ice/structure interface, modulating the phase and amplitude of the higher frequency ultrasonic probing signal passing through the structure (8). In the frequency domain the result of this modulation manifests itself as sideband spectral components with respect to frequency of the probe wave. This can be considered as a new signal generated by a defect, so that the defect can be detected more easily when such a signal is observed.