WO2010130144A1 - 一种结构损伤检测系统、设备以及结构损伤检测方法 - Google Patents
一种结构损伤检测系统、设备以及结构损伤检测方法 Download PDFInfo
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- WO2010130144A1 WO2010130144A1 PCT/CN2010/000470 CN2010000470W WO2010130144A1 WO 2010130144 A1 WO2010130144 A1 WO 2010130144A1 CN 2010000470 W CN2010000470 W CN 2010000470W WO 2010130144 A1 WO2010130144 A1 WO 2010130144A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
- G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Definitions
- the invention relates to a structural damage detecting system, a device and a structural damage detecting method, in particular to a structural damage detecting system, a device and a structural damage detecting method for non-destructively detecting damage of an engineering structure.
- the static displacement, velocity, acceleration and other responses under external excitation are used to reverse the damage in the engineering structure. If the sensor is embedded in the engineering structure in advance, the real-time monitoring of the damage situation can be realized, but at this time, the damage response can be performed only by the structural response excited by the environmental excitation when the engineering structure works. Compared with the local detection technology, the detection efficiency of the overall detection technology is high. However, the overall detection technique has the following disadvantages. First, if the applied stimulus is not applied properly, the response of the engineering structure may not fully reflect the damage, thus Affect the detection accuracy. For example, if the static load is small and the crack in the engineering structure cannot be fully expanded, the static displacement is not sensitive to such damage.
- the damage is a local feature of the engineering structure, its influence on the dynamic characteristics of the structure is often only reflected in the higher-order frequency band. Therefore, if the external excitation cannot excite the high-order response of the engineering structure, the accuracy of the damage inversion is better. Poor, so the results obtained by the overall test are less accurate.
- the overall method also has problems such as reasonable layout of sensors, durability of sensors, interference of environmental noise, and acquisition and transmission of signals.
- the tapping method based on the percussive mechanical model established by Cawley can detect damage in composite laminates.
- the percussive mechanics model considers that when the hammer is struck to the structural damage site, the tapping force signal generated by the tapping force time history signal at the place is smaller than the tapping force signal generated when the hammer is struck to the complete part. Larger width. According to this, by calculating the area of the striking force spectrum curve and the frequency coordinate axis, a characteristic parameter R can be obtained, and the damage can be identified by comparing the R value of the intact and the damaged part. In addition, the width of the tapping force time history signal before and after the damage can be directly compared to identify the damage.
- the tapping method is also a local detection technique that does not require the sensor to be attached to the structure, and is sensitive to damage due to the ability to acquire changes in the local stiffness of the structure.
- this method uses the spectrum information of the striking force of the entire frequency band, which reduces the accuracy of the damage identification to a certain extent, because: (1) damage is often reflected in the higher-order frequency band of the tapping force, The entire frequency band information will mask the information on the damage sensitive frequency band; (2) The information of the entire frequency band contains the components of environmental noise.
- the frequency range covered by the striking force line is determined by the structural stiffness and the stiffness of the hammer.
- Yang Yongbin et al. proposed a method for extracting the fundamental frequency of a bridge by using the vehicle as a stimulus and using the acceleration signal of the vehicle.
- the advantage of this method is that there is no need to install sensors on the bridge, and the measurement process does not affect the normal operation of the bridge.
- this method does not install a tapping device on the vehicle, so it is difficult to excite the higher frequency response of the bridge, and the obtained acceleration signal is not sensitive to local damage, and it is difficult to detect the damage of the structure only according to the fundamental frequency of the bridge. . Therefore, it is desirable to provide a structural damage inspection method and structural damage detection apparatus that can easily, quickly and accurately detect damage in an engineering structure without knowing the complete feature information of the engineering structure in advance. Summary of the invention
- the present invention has been made in order to provide a structural damage detecting method and a structural damage detecting apparatus which overcome the above problems or at least partially solve the above problems.
- a structural damage detecting method for detecting damage of a structure comprising the steps of: scanning along a surface of the structure using a striking device, wherein the striking device is simultaneously scanning Knocking with a tapping force having a predetermined frequency band; sensing, by the sensor, a response signal transmitted by the structural surface to the striking device at each position of the surface of the structure, wherein the signal sensed by the sensor Can be at least one of displacement, velocity, and acceleration; transforming the signal sensed by the sensor to obtain a signal spectrum or scale spectrum at each location of the surface of the structure; from the spectrum of the signal A spectral envelope corresponding to a predetermined frequency band of the striking force is intercepted; a damage indication value at each position of the structural surface is calculated, the damage indication value reflecting a spectral envelope at the position The degree to which the line is similar to the spectral envelope at other locations; and the location at which the damage indication value is abruptly identified as the location where the structural damage exists.
- a structural damage detecting apparatus comprising a tapping device for tapping on a surface of a structure to be inspected with a tapping force having a predetermined frequency band; and a sensor for sensing by the to-be-detected a response signal transmitted by the structural surface to the striking device, wherein the sensor-sensed response signal may be at least one of displacement, velocity, and acceleration; wherein the tapping device and the sensor are integrated While the tapping device performs a tap on the surface of the structure to be inspected, the sensor senses a response signal transmitted from the surface of the structure to be detected to the tapping device.
- a structural damage detecting system comprising a structural damage detecting device according to the present invention, and a signal processing component for performing a signal sensed by a sensor in the structural damage detecting device Processing to determine a location of damage in the structure to be inspected, the signal processing component comprising: spectral acquisition means for transforming a signal sensed by the sensor to obtain at each location of the surface of the structure a signal spectrum or scale spectrum; a spectral envelope intercepting means for extracting, from the signal spectrum, a spectral envelope corresponding to a predetermined frequency band of the tapping force; a computing device configured to calculate a damage indication value at each location of the surface of the structure, the damage indication value reflecting a degree of similarity of a spectral envelope at the location to a spectral envelope at other locations; A damage location determining device for determining a damage location in the structure based on a damage indication value at each location of the structural surface.
- the structural damage detecting method, apparatus and system according to the present invention can set the magnitude and frequency band of the striking force, which is advantageous for exciting the damage information and avoiding the interference of the environmental noise. Moreover, the present invention is only for detecting The response of the frequency band corresponding to the frequency band of the tapping force in the response of the structure surface transmitted to the striking device is further processed, which can improve the detection accuracy.
- the structural damage detecting method, apparatus and system according to the present invention do not need to know the characteristic information of the lossless structure in advance, and are more convenient to implement; and are applicable to various forms of damage of structural materials that may occur in aerospace, civil engineering, and machinery. Application in the field. DRAWINGS
- FIG. 1 is a schematic illustration of a structural damage detection system 100 in accordance with one embodiment of the present invention
- FIG. 2 is a top plan view of a structural damage detection system 200 in accordance with another embodiment of the present invention
- Figure 3 is a front elevational view, along line A of Figure 3, of the structural damage detection system 200 in accordance with another embodiment of the present invention.
- Figure 4 is a distribution diagram of MAC matrix elements
- Fig. 5 schematically shows a flow chart of a structural damage detecting method in accordance with one embodiment of the present invention. Specific embodiment
- FIG. 1 illustrates a structural damage detection system 100 in accordance with one embodiment of the present invention. As shown
- the structural damage detecting system 100 includes a structural damage detecting device 110 and a signal processing component 120.
- the structural damage detecting device 110 is configured to apply a tap and feel on the detected structure A response signal transmitted from the surface of the detected structure to the tapping device is measured.
- the signal processing component 120 processes the response signal sensed by the structural damage detecting device 110 to determine if there is damage and damage in the detected structure.
- the structural damage detecting apparatus 110 includes a striking device 112 and a sensor 114 integrated with the striking device 112.
- the tapping device 1 12 is for tapping the structure to be inspected with a tapping force having a predetermined frequency band and size while the structural damage detecting device 110 performs scanning on the surface of the structure to be inspected.
- Sensor 114 senses the response transmitted by the surface of the structure to be inspected to the striking device.
- the surface of the structure to be inspected will generate displacement, velocity and acceleration response under the action of the striking force. Due to the interaction between the surface of the structure to be inspected and the striking device, these responses are transmitted to the striking device, and the instantaneous value
- the size of the structure can reflect the structural features of the detected structure at the tapping position. Therefore, when damage occurs in the detected structure, the displacement, velocity or acceleration response from the surface of the structure to be detected to the striking device at that position will be The response of the damage location is significantly different, and the present invention is based on this. sensor
- sensor 114 may be any sensor capable of sensing the response transmitted by the surface of the structure to be detected to the tapping device.
- sensor 114 may be any sensor capable of sensing one of the displacement, velocity, and acceleration responses transmitted by the surface of the structure to be inspected to the striking device.
- the sensor 114 is an acceleration sensor for sensing the acceleration response transmitted by the surface of the structure to be detected to the tapping device, because the acceleration a and the structural displacement response sensed by the sensor 14 are b.
- the relationship between the structural local impedance Z and the striking force F has the following relationship:
- the signal processing unit 120 includes a spectrum acquisition unit 122, a spectral envelope intercepting unit 124, a damage indication value calculating unit 126, and a lesion position determining unit 128.
- the spectrum acquisition device 122 acquires the sensor signals sensed by the sensor 114.
- the surface of the detected structure may be divided into a plurality of portions having a certain size, and the structural damage detecting device 110 needs to scan each surface portion for a certain time.
- the signal acquired by the sensor 114 is Sensor signal distribution over this period of time.
- the spectral acquisition device 112 performs a transform process on the temporal distribution of the sensor signal to obtain a representation of the signal over the frequency domain or scale domain.
- This transformation process can be performed using any transformation process in the prior art, for example, the transformation process can be short-time Fu Fourier transform, wavelet transform, or Hilbert-Huang transform.
- the spectral acquisition device 122 acquires a signal spectrum or scale spectrum at each location portion of the surface of the structure.
- the spectral envelope intercepting means 124 intercepts, from the signal spectrum, a spectral envelope corresponding to the tapping force band of the tapping means.
- the present invention only intercepts the spectrum corresponding to the tapping frequency band of the tapping device, and then analyzes only the signals in the spectrum, thereby reducing the processing overhead required to process the entire frequency band spectrum, and the other
- the tapping frequency band to a frequency band different from the frequency band of the environmental noise, the influence of the environmental noise on the detection result can be significantly reduced, thereby improving the detection accuracy.
- the damage indication value calculation means 126 calculates a damage indication value at each position of the surface of the detected structure based on the intercepted spectral envelope, the damage indication value reflecting the spectral envelope at the position and other positions The degree of similarity of the spectral envelope.
- the damage indication value may be calculated as follows, first converting the spectral envelope into a spectral vector, which may be obtained by acquiring the spectral envelope. The amplitude at multiple frequencies in the line is converted as a component of the spectral vector. The number of components of the spectral vector can be determined based on the detection accuracy and the processing performance of the system.
- the frequency corresponding to the component may be evenly distributed in the frequency band of the speech envelope or may be unevenly distributed. However, for the structure being inspected, the frequency selection at each location should be the same.
- a damage indication value reflecting the degree of similarity of the spectral vector at the current location and the spectral vector at other locations is calculated.
- the damage indication value can be calculated as: Where Yi and Yj respectively represent the spectral vector at the current position and other positions on the structure, ⁇ represent the inner product operation of the spectral vector, W and I ⁇ represent the length of the vectors Yi and Yj
- n is the number of unit detection portions divided by the detected structure.
- Yi and Yj are, the more similar the shape of the envelope i and the envelope j are, the closer to 1. Therefore, the damage indication value for a certain spectral vector Yi can be the spectral vector Yi and all other spectra The average of the sum of the similarities of the graph vectors Yj.
- the MAC coefficient can be utilized to obtain the damage indication value.
- the formula for calculating the MAC coefficient matrix is:
- Yi and Yj represent the spectral vectors of the i-th and j-th portions, respectively, on the structure, • represent the inner product operations of the spectral vectors, and W and ⁇ ⁇ 1 represent the lengths of the vectors Yi and Yj.
- Each element in the MAC coefficient matrix represents the degree of similarity between two spectral vectors, where the elements on the main diagonal must be equal to one.
- the size of the i-th row or the i-th column element of the MAC coefficient matrix can reflect the damage condition corresponding to a certain spectral vector Yi, and thus the damage indication value of the position corresponding to the spectral vector Yi.
- the damage position determining means 128 determines the damage position in the detected structure based on the damage indication value at each position of the surface of the detected structure. For example, the damage position determining means 128 may determine the position at which the damage indication value suddenly drops as the position where the damage exists. Because if the structure is not damaged, the distribution of damage indication values in space is relatively smooth; if the damage indication value of a certain location is abrupt, it means that the local impedance is obviously different from other places, and damage is likely to occur. The size of the mutation also reflects the severity of the damage. For example, take the value of the first row element of the MAC coefficient matrix as the vertical axis element, and draw a curve with the corresponding structural position as the horizontal axis.
- the curve should be relatively smooth; if the curve is somewhere A sudden drop indicates that there is damage at that place, and the greater the drop, the more serious the damage.
- the position where the absolute value of the first derivative value of the curve exceeds the predetermined threshold may be determined as the position where the damage is present.
- FIGS. 2 and 3 show schematic views of a damage detection system 200 suitable for structural damage detection of a structure similar to a bridge, in accordance with another embodiment of the present invention.
- the structure to be inspected is a plate structure having an axial length much larger than a section perpendicular to the axial direction, and the plate structure is very similar in cross section in the axial direction.
- Such structures are common in engineering practice, such as road bridges, railway bridges, etc., which have such a structure.
- bridges often need to be tested to ensure that the bridge is not damaged, or repaired in time after the damage has occurred to prevent accidents due to bridge breakage.
- the damage detection system 200 shown in Figures 2 and 3 is well suited for damage detection of similar bridge structures as described above.
- the detected structure is a laminate 5 which is fixed on the ground.
- the two steel bars 4, and a certain gap from the ground, should ensure that the structural damage detecting device 210 does not contact the ground when moving to the intermediate position of the laminated plate 5, so that the laminated plate 5 can well simulate the bridge structure in reality.
- damage 6 was produced in the laminate 5, and the damage appeared as a crack.
- the structural damage detecting device 210 is integrated on the steel trolley 1, wherein the striking device 3 can generate a striking force having a predetermined frequency band under the control of the control signal.
- the striking device 3 is a JZK-2 exciter that can generate a tapping force having a predetermined frequency band under the control of a control signal from the computer 11.
- the DASYLab software in computer 11 can generate control signals synthesized by 16 equal-width sinusoidal signals distributed between 90-240HZ. These control signals are digitally modeled by the D/A port of the ACL-8112-PG conversion card. The conversion is amplified by the YE5871 power amplifier 10 and finally transmitted to the exciter 3 to generate a tapping force in the 90-240 Hz band.
- the sensor 2 in the structural damage detecting device 210 is an acceleration sensor that senses an acceleration signal transmitted from the surface of the structure to be detected to the striking device 3, and sends it to the signal processing unit 120 in the computer 11 for further processing.
- the acceleration sensor 2 can adopt a YD-36 piezoelectric accelerometer, and the collected signal is amplified by the YE5852T charge amplifier 9 and then digital-analog converted through the A/D port of the ACL-81 12-PG conversion card and input to the computer.
- further processing is performed by the signal processing unit 120 therein.
- the sampling rate of the acceleration sensor acquisition signal is 1024 times/second.
- the structure of the signal processing unit 120 is substantially the same as that of the embodiment shown in Fig. 1, and will not be described again here.
- the laminate 5 is divided in the length direction of the sheet in units of 1.3 cm, since the traveling speed of the carriage 1 is 1.3 cm/s, and the sampling rate of the acceleration sensor acquisition signal is 1024 times/second. Therefore, the spectrum acquiring means 122 acquires the sensing signal in accordance with the data length of 1024 acceleration signals, and obtains the spectrum pattern by the short-time Fourier transform method.
- the spectral envelope intercepting device 124 intercepts the frequency band corresponding to the tapping force, that is, the 90-240 Hz band Spectrum envelope.
- the damage indication value calculation means 126 selects a frequency of 90, 100, 110..., 240 frequency as the frequency corresponding to the component in the spectrum vector, i.e., the damage indication value calculation means 126 vectorizes the spectral envelope to a length of 16. vector. Then, the damage indication value calculation means 126 calculates a matrix of MAC coefficients:
- the damage position determining means 128 can determine the damage position based on the value of the MAC coefficient matrix.
- Figure 4 shows the distribution of the MAC matrix elements, which is the result of the detection of an artificially fabricated laminate of about 2 cm long cracks 6 in a 140 x 15 x 3 cm laminate.
- the MAC coefficient of the crack position is significantly lower than the MAC coefficient at other positions, thereby indicating that the method of the present invention can effectively detect the damage of the structure.
- Fig. 5 schematically shows a flow chart of a structural damage detecting method in accordance with one embodiment of the present invention.
- the method begins in step S510, in which a tapping device in a structural damage detecting apparatus according to the present invention is used to scan along a surface of a structure to be inspected, wherein the tapping device is scanning At the same time, the tapping force is performed with a tapping force having a predetermined frequency band.
- the response signal of the tapping device is sensed by the sensor in the structural damage detecting device according to the present invention.
- the sensed signal may be any response signal capable of reflecting the tapping position transmitted by the surface of the structure to be detected to the striking device.
- the signal sensed by the sensor can be displacement, velocity or acceleration.
- the signal sensed by the sensor is an acceleration signal that is more convenient for engineering implementation.
- the signal sensed by the sensor is subjected to a transform process to acquire a signal spectrum at each position of the surface of the detected structure. According to the requirements of the detection accuracy, it is necessary to divide the surface of the structure to be tested into a plurality of parts.
- the signal sensed on each portion is a distribution of the time required for the signal to be scanned by the structural damage detecting device, so that the signal can be transformed in the time domain to obtain the signal in the frequency domain or the scale domain. Representation.
- This transform processing can be performed by any transform processing in the prior art, for example, the transform processing can be a short time Fourier transform, a wavelet transform, or a Hilbert-Huang transform.
- step S540 the tapping force of the tapping device is intercepted from the signal spectrum The portion corresponding to the predetermined frequency band and the envelope of the intercepted spectrum.
- the structural damage detecting method according to the present invention intercepts only the spectrum corresponding to the tapping band of the striking device, and then analyzes only the signals in the band spectrum.
- a damage indication value at each position of the surface of the detected structure is calculated according to the intercepted spectral envelope, the damage indication value reflecting the spectral envelope at the position and other positions The degree of similarity of the spectral envelope. There are several ways to calculate the damage indication value.
- the damage indication value can be calculated as follows:
- the number of components of the spectral vector can be determined based on the detection accuracy and the processing performance of the system.
- the frequency corresponding to the component can be evenly distributed in the frequency band of the spectral envelope or unevenly distributed. However, for the structure being inspected, the frequency selection at each location should be the same;
- a damage indication value reflecting the degree of similarity of the spectral vector at the current location and the spectral vector at other locations is calculated. There are several ways to calculate the degree of similarity between two spectral vectors.
- the damage indication value can be calculated as: Where Yi and Yj represent the spectral vector at the current position and other positions on the structure, respectively, ⁇ represent the inner product operation of the spectral vector, w and 1 ⁇ 1 represent the length of ⁇ 3 ⁇ 43 ⁇ 4i and Yj, n is the The number of unit detection sections divided by the detection structure is detected. ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ The more similar the Yi and Yj are, the more similar the shape of the envelope i and the envelope j are, the closer to 1. Therefore, the damage indication value for a certain spectral vector Yi may be an average of the sum of the similarity of the spectral vector Yi and all other spectral vectors Yj.
- the MAC coefficient can be utilized to obtain the damage indication value.
- the formula for calculating the MAC coefficient matrix is: Where Yi and Yj represent the spectra of the i-th and j-th portions of the structure, respectively Vector, ⁇ represents the inner product operation of the spectral vector, W and 1 ⁇ 1 represent the length of the vectors Yi and Yj.
- Each element in the MAC coefficient matrix represents the degree of similarity between two spectral vectors, where the elements on the main diagonal must be equal to one.
- the size of the i-th row or the i-th column element of the MAC coefficient matrix can reflect the damage condition corresponding to a certain spectral vector Yi, and thus the damage indication value of the position corresponding to the spectral vector Yi.
- the damage position in the detected structure is determined based on the damage indication value at each position of the surface of the detected structure.
- the position at which the damage indication value suddenly drops can be determined as the position where the damage exists.
- the position where the absolute value of the first derivative value of the curve exceeds the predetermined threshold value may be determined as the position where the damage exists.
- the components therein are logically divided according to the functions to be implemented, but the present invention is not limited thereto, and signals may be required as needed.
- the various components in the processing component are re-divided or combined, for example, some components may be combined into a single component, or some components may be further broken down into more sub-components.
- the signal processing component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functionality of some or all of the signal processing components in accordance with embodiments of the present invention may be implemented in practice using a microprocessor or digital signal processor (DSP).
- DSP digital signal processor
- the invention can also be implemented as a device or device program (e.g., a computer program and a computer program product) for performing some or all of the methods described herein.
- Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/320,260 US9316620B2 (en) | 2009-05-13 | 2010-04-09 | Structural damage detection system, device and method |
| CN201080020956.8A CN102422154B (zh) | 2009-05-13 | 2010-04-09 | 一种结构损伤检测系统、设备以及结构损伤检测方法 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100837725A CN101561379B (zh) | 2009-05-13 | 2009-05-13 | 一种用于结构损伤检测的敲击扫描方法 |
| CN200910083772.5 | 2009-05-13 |
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| WO2010130144A1 true WO2010130144A1 (zh) | 2010-11-18 |
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| PCT/CN2010/000470 Ceased WO2010130144A1 (zh) | 2009-05-13 | 2010-04-09 | 一种结构损伤检测系统、设备以及结构损伤检测方法 |
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| US (1) | US9316620B2 (zh) |
| CN (2) | CN101561379B (zh) |
| WO (1) | WO2010130144A1 (zh) |
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| WO2014101832A1 (zh) * | 2012-12-28 | 2014-07-03 | 中国路桥工程有限责任公司 | 敲击扫描式桥梁损伤检测系统 |
| CN109002673A (zh) * | 2018-10-08 | 2018-12-14 | 哈尔滨工业大学 | 一种基于车辆制动冲击作用的桥梁基础冲刷识别方法 |
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| CN101561379B (zh) * | 2009-05-13 | 2011-06-29 | 清华大学 | 一种用于结构损伤检测的敲击扫描方法 |
| CN101923027B (zh) * | 2010-05-28 | 2012-12-12 | 清华大学 | 一种结构损伤检测系统、设备以及结构损伤检测方法 |
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| CN103076277A (zh) * | 2012-12-28 | 2013-05-01 | 清华大学 | 敲击扫描式桥梁损伤检测的敲击载荷施加装置 |
| CN103076399B (zh) * | 2012-12-28 | 2015-11-25 | 中国路桥工程有限责任公司 | 敲击扫描式桥梁损伤检测定位系统 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102422154B (zh) | 2014-02-26 |
| CN102422154A (zh) | 2012-04-18 |
| US20120059600A1 (en) | 2012-03-08 |
| US9316620B2 (en) | 2016-04-19 |
| CN101561379B (zh) | 2011-06-29 |
| CN101561379A (zh) | 2009-10-21 |
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