A method and device for health monitoring of a steel bridge deck pavement system

Abstract

The present application relates to the technical field of bridge health monitoring, and in particular to a method and device for monitoring the health of a steel bridge deck pavement system. In the method, the present application makes full use of the fact that ultrasonic guided waves can propagate over long distances in waveguide structures such as plate-like structures with low energy loss, and that ultrasonic guided waves are relatively sensitive to tiny damages. A plurality of ultrasonic guided wave sensors are embedded in the steel bridge deck pavement to form an ultrasonic guided wave rectangular sensor array, wherein each ultrasonic guided wave sensor can be used as both a transmitting sensor and a receiving sensor. The ultrasonic guided wave sensors are stimulated and controlled to generate ultrasonic guided waves, and signals are generated by automatically switching a plurality of sensors in the ultrasonic guided wave rectangular sensor array. Defects are accurately located by a joint positioning imaging technology based on ultrasonic phased focusing technology and synthetic aperture focusing technology, and signal amplitude analysis is mapped to color value imaging to detect hidden fatigue cracks, thereby evaluating the state of the steel bridge deck pavement system.

Description

Technical Field

[0001] The present application relates to the technical field of bridge health monitoring, and particularly to a method and device for health monitoring of a steel bridge deck pavement system. Background Art

[0002] Fatigue cracks in orthotropic steel bridge decks are characterized by universality, early occurrence, multiplicity, and reproducibility. The fatigue cracking problem of orthotropic steel bridge decks seriously affects the safety, durability, and operation quality of bridge structures. The detection of fatigue cracks in steel bridge decks basically relies on regular visual inspections by inspectors. However, conventional visual inspections cannot detect hidden fatigue cracks in the welded area between U-shaped ribs and the deck plate, which pose a greater threat to structural safety and service quality.

[0003] Currently, in actual engineering, the detection of hidden fatigue cracks can only be carried out by removing the bridge deck pavement, which requires blocking traffic for a long time. Since long-span bridges with orthotropic steel bridge decks often control the throat of major traffic arteries, blocking traffic for a long time will cause huge economic losses and have many adverse social impacts.

[0004] Therefore, a method for health monitoring of a steel bridge deck pavement system is needed to detect hidden fatigue cracks without blocking traffic, so as to realize the health monitoring of the steel bridge deck pavement system and provide a scientific basis for the further maintenance and repair of orthotropic steel bridge decks, thereby ensuring the safe and stable operation of the bridge. Summary of the Invention

[0005] The present application discloses a method and device for health monitoring of a steel bridge deck pavement system, which are used for the technical problem that in actual engineering, the detection of hidden fatigue cracks can only be carried out by removing the bridge deck pavement, which requires blocking traffic for a long time, and a method for health monitoring of a steel bridge deck pavement system is needed to detect hidden fatigue cracks without blocking traffic, so as to realize the health monitoring of the steel bridge deck pavement system.

[0006] The first aspect of the present application discloses a method for health monitoring of a steel bridge deck pavement system, including:

[0007] Simultaneously exciting and receiving multiple ultrasonic guided wave sensors in a pre-set ultrasonic guided wave rectangular sensor array for multiple times, and using ultrasonic phased array focusing technology to determine the ultrasonic phased array focusing technology defect location imaging result, wherein the ultrasonic guided wave rectangular sensor array is arranged at the bottom of the pavement layer at the wheel path belt and the middle position between two wheel path belts of the steel bridge deck, and at the top of the steel bridge deck, wherein multiple groups of ultrasonic guided wave rectangular sensor arrays are arranged, and each group of ultrasonic guided wave rectangular sensor arrays includes multiple ultrasonic guided wave sensors;

[0008] Excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array in turn, and use synthetic aperture focusing technology to determine the defect localization imaging result of synthetic aperture focusing technology;

[0009] Based on the defect localization imaging result of the ultrasonic phased focusing technology and the defect localization imaging result of the synthetic aperture focusing technology, perform joint defect localization imaging to detect hidden fatigue cracks.

[0010] Optionally, the multiple simultaneous excitation and simultaneous reception of the ultrasonic guided wave sensors in the pre-set ultrasonic guided wave rectangular sensor array, and the use of ultrasonic phased focusing technology to determine the defect localization imaging result of ultrasonic phased focusing technology includes:

[0011] Perform multiple simultaneous excitation and simultaneous reception of the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and through a zeroing time window, perform zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal to determine the first zeroing transformation signal,

[0012] Based on the first zeroing transformation signal, determine the first envelope curve, and determine the signal amplitude superposition matrix according to the first envelope curve;

[0013] Perform imaging processing on the mapped color values of the signal amplitude superposition matrix to determine the ultrasonic phased focusing image, and perform 95% thresholding processing on the ultrasonic phased focusing image to determine the defect localization imaging result of ultrasonic phased focusing technology.

[0014] Optionally, the excitation of the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array in turn, and the use of synthetic aperture focusing technology to determine the defect localization imaging result of synthetic aperture focusing technology includes:

[0015] Excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array in turn, while the ultrasonic guided wave sensors receive, and through a zeroing time window, perform zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal to determine the second zeroing transformation signal;

[0016] Based on the second zeroing transformation signal, determine the second envelope curve, and determine the signal echo amplitude matrix according to the second envelope curve;

[0017] Perform imaging processing on the mapped color values of the signal echo amplitude matrix to determine the synthetic aperture focusing image, and perform 80% thresholding processing on the synthetic aperture focusing image to determine the defect localization imaging result of synthetic aperture focusing technology.

[0018] Optionally, the ultrasonic guided wave sensor is connected to an ultrasonic guided wave excitation acquisition and processing platform through a signal cable. The ultrasonic guided wave excitation acquisition and processing platform is used to determine the defect location imaging result of the ultrasonic phased array focusing technology by using the ultrasonic phased array focusing technology, and is used to determine the defect location imaging result of the synthetic aperture focusing technology by using the synthetic aperture focusing technology.

[0019] Optionally, in the ultrasonic guided wave rectangular sensor array, the distance between any two ultrasonic guided wave sensors is less than 50 mm.

[0020] Optionally, the ultrasonic guided wave rectangular sensor array includes a single excitation and multiple reception functions and multiple excitation and multiple reception functions. The ultrasonic guided wave sensor includes a simultaneous excitation and simultaneous reception function.

[0021] Optionally, any group of the ultrasonic guided wave rectangular sensor arrays includes 8 ultrasonic guided wave sensors.

[0022] In a second aspect of the present application, a health monitoring device for a steel bridge deck pavement system is disclosed. The health monitoring device for the steel bridge deck pavement system is applied to the health monitoring method for the steel bridge deck pavement system disclosed in the first aspect of the present application. The health monitoring device for the steel bridge deck pavement system includes:

[0023] An ultrasonic phased array focusing processing module, configured to simultaneously excite and receive the ultrasonic guided wave sensors in a pre-set ultrasonic guided wave rectangular sensor array multiple times, and use the ultrasonic phased array focusing technology to determine the defect location imaging result of the ultrasonic phased array focusing technology. Among them, the ultrasonic guided wave rectangular sensor array is arranged at the bottom of the pavement layer in the wheel path of the steel bridge deck and in the middle position between two wheel paths, and is arranged on the top of the steel bridge deck. Among them, multiple groups of the ultrasonic guided wave rectangular sensor arrays are arranged, and each group of the ultrasonic guided wave rectangular sensor arrays includes multiple ultrasonic guided wave sensors;

[0024] A synthetic aperture focusing processing module, configured to alternately excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and use the synthetic aperture focusing technology to determine the defect location imaging result of the synthetic aperture focusing technology;

[0025] A health status monitoring module, configured to perform joint defect location imaging according to the defect location imaging result of the ultrasonic phased array focusing technology and the defect location imaging result of the synthetic aperture focusing technology, and detect hidden fatigue cracks.

[0026] Optionally, the ultrasonic phased array focusing processing module includes:

[0027] The first excitation and reception unit is configured to simultaneously excite and receive the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array multiple times, and perform a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window to determine a first zeroing transformation signal.

[0028] The first matrix determination unit is configured to determine a first envelope curve according to the first zeroing transformation signal, and determine a signal amplitude superposition matrix according to the first envelope curve.

[0029] The first imaging unit is configured to perform imaging processing on the color values mapped by the signal amplitude superposition matrix to determine an ultrasonic phased array focusing image, and perform a 95% thresholding process on the ultrasonic phased array focusing image to determine an imaging result of defect location by ultrasonic phased array focusing technology.

[0030] Optionally, the synthetic aperture focusing processing module includes:

[0031] The second excitation and reception unit is configured to alternately excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, while the ultrasonic guided wave sensors perform reception, and perform a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window to determine a second zeroing transformation signal.

[0032] The second matrix determination unit is configured to determine a second envelope curve according to the second zeroing transformation signal, and determine a signal echo amplitude matrix according to the second envelope curve.

[0033] The second imaging unit is configured to perform imaging processing on the color values mapped by the signal echo amplitude matrix to determine a synthetic aperture focusing image, and perform an 80% thresholding process on the synthetic aperture focusing image to determine an imaging result of defect location by synthetic aperture focusing technology.

[0034] Optionally, the ultrasonic guided wave sensors are connected to an ultrasonic guided wave excitation, acquisition and processing platform through signal cables. The ultrasonic guided wave excitation, acquisition and processing platform is configured to determine an imaging result of defect location by ultrasonic phased array focusing technology by using ultrasonic phased array focusing technology, and is configured to determine an imaging result of defect location by synthetic aperture focusing technology by using synthetic aperture focusing technology.

[0035] Optionally, in the ultrasonic guided wave rectangular sensor array, the distance between any two ultrasonic guided wave sensors is less than 50 mm.

[0036] Optionally, the ultrasonic guided wave rectangular sensor array includes a single excitation and multiple reception functions and multiple excitation and multiple reception functions, and the ultrasonic guided wave sensors include simultaneous excitation and simultaneous reception functions.

[0037] Optionally, any group of the ultrasonic guided wave rectangular sensor array includes 8 ultrasonic guided wave sensors.

[0038] The present application relates to the technical field of bridge health monitoring, and in particular to a method and device for monitoring the health of a steel bridge deck pavement system. In the method, the present application makes full use of the fact that ultrasonic guided waves can propagate over long distances in waveguide structures such as plate-like structures with low energy loss, and that ultrasonic guided waves are more sensitive to tiny damages. A plurality of ultrasonic guided wave sensors are embedded in the steel bridge deck pavement to form an ultrasonic guided wave rectangular sensor array, wherein each ultrasonic guided wave sensor can be used as both a transmitting sensor and a receiving sensor. The ultrasonic guided wave sensors are stimulated and controlled to generate ultrasonic guided waves, and signals are generated by automatically switching a plurality of sensors in the ultrasonic guided wave rectangular sensor array. Defects are accurately located by a joint positioning imaging technology based on ultrasonic phased focusing technology and synthetic aperture focusing technology, and signal amplitude analysis is mapped to color value imaging to detect hidden fatigue cracks, thereby evaluating the state of the steel bridge deck pavement system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A schematic diagram of the workflow of a method for health monitoring of a steel bridge deck pavement system disclosed in an embodiment of the present application;

[0041] Figure 2 A schematic diagram of the arrangement of an ultrasonic guided wave rectangular sensor array in a steel bridge deck pavement system health monitoring method disclosed in an embodiment of the present application;

[0042] Figure 3 A schematic diagram of the arrangement of ultrasonic guided wave sensors in a method for monitoring the health of a steel bridge deck pavement system disclosed in an embodiment of the present application;

[0043] Figure 4 A schematic diagram of a Hilbert transform algorithm case in a health monitoring method for a steel bridge deck pavement system disclosed in an embodiment of the present application;

[0044] Figure 5 A comparison diagram of X-coordinate results of defect location when the defect is a hole in a steel bridge deck pavement system health monitoring method disclosed in an embodiment of the present application;

[0045] Figure 6 This is a comparison chart of the Y-coordinate results of defect location when the defect is a hole in a field embodiment of a steel bridge deck pavement system health monitoring method disclosed in an embodiment of the present application.

[0046] Figure 7 The structural schematic diagram of a health monitoring device for a steel bridge deck pavement system disclosed in an embodiment of the present application.

[0047] Illustration:

[0048] Among them, 1 - steel bridge deck pavement system, 2 - steel bridge deck, 3 - U-shaped stiffening rib, 4 - ultrasonic guided wave sensor array, 5 - signal cable, 6 - ultrasonic guided wave excitation acquisition and processing platform, 7 - ultrasonic guided wave sensor. Specific implementation manners

[0049] In order to solve the problem that in actual engineering, the detection of hidden fatigue cracks can only be carried out by removing the bridge deck pavement, which requires blocking traffic for a long time, a health monitoring method for a steel bridge deck pavement system is needed. Without blocking traffic, by detecting hidden fatigue cracks, the technical problem of realizing the health monitoring of the steel bridge deck pavement system is solved. The present application discloses a health monitoring method and device for a steel bridge deck pavement system through the following embodiments.

[0050] The first embodiment of the present application discloses a health monitoring method for a steel bridge deck pavement system. Refer to Figure 1 the working process schematic diagram shown. The health monitoring method for the steel bridge deck pavement system includes:

[0051] Step S1, simultaneously excite and receive the ultrasonic guided wave sensors in the pre-set ultrasonic guided wave rectangular sensor array multiple times, and use the ultrasonic phased array focusing technology to determine the defect location imaging result of the ultrasonic phased array focusing technology. Among them, the ultrasonic guided wave rectangular sensor array is arranged at the bottom of the pavement layer in the wheel path and the middle position between two wheel paths of the steel bridge deck, and is arranged on the top of the steel bridge deck. Among them, multiple groups of the ultrasonic guided wave rectangular sensor arrays are arranged, and each group of ultrasonic guided wave rectangular sensor arrays includes multiple ultrasonic guided wave sensors.

[0052] In some embodiments of the present application, the simultaneously exciting and receiving the ultrasonic guided wave sensors in the pre-set ultrasonic guided wave rectangular sensor array multiple times, and using the ultrasonic phased array focusing technology to determine the defect location imaging result of the ultrasonic phased array focusing technology includes:

[0053] Simultaneously excite and receive the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array multiple times, and through the zeroing time window, perform zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal to determine the first zeroing transformation signal.

[0054] According to the first zeroing transformation signal, determine the first envelope curve, and determine the signal amplitude superposition matrix according to the first envelope curve.

[0055] Perform imaging processing on the color values mapped by the signal amplitude superposition matrix to determine the ultrasonic phased focusing image, and perform 95% thresholding processing on the ultrasonic phased focusing image to determine the imaging result of the defect location of the ultrasonic phased focusing technology.

[0056] In some embodiments of the present application, the ultrasonic guided wave sensor is connected to the ultrasonic guided wave excitation acquisition and processing platform through a signal cable. The ultrasonic guided wave excitation acquisition and processing platform is used to determine the imaging result of the defect location of the ultrasonic phased focusing technology by using the ultrasonic phased focusing technology, and is used to determine the imaging result of the defect location of the synthetic aperture focusing technology by using the synthetic aperture focusing technology. Specifically, the ultrasonic guided wave sensor is connected to the ultrasonic guided wave excitation acquisition and processing platform through a signal cable, and the ultrasonic guided wave excitation acquisition and processing platform sets the excitation and acquisition parameters.

[0057] In some embodiments of the present application, in the ultrasonic guided wave rectangular sensor array, the distance between any two ultrasonic guided wave sensors is less than 50 mm. Specifically, in the ultrasonic guided wave rectangular sensor array, since the sensor spacing is less than half of the wavelength at the minimum frequency of the excitation frequency band, the distance d between any two ultrasonic guided wave sensors is d ≤ 50 mm.

[0058] In some embodiments of the present application, the ultrasonic guided wave rectangular sensor array includes the functions of single excitation and multiple receptions and multiple excitations and multiple receptions, and the ultrasonic guided wave sensor includes the functions of simultaneous excitation and simultaneous reception. Specifically, the ultrasonic guided wave rectangular sensor array has the functions of single excitation - multiple receptions and multiple excitations - multiple receptions, and the sensor has the functions of simultaneous excitation and simultaneous reception.

[0059] In some embodiments of the present application, any group of the ultrasonic guided wave rectangular sensor arrays includes 8 ultrasonic guided wave sensors.

[0060] Specifically, in the steel bridge deck wheel path and the middle position between the two wheel paths, at the bottom of the paving layer and the top of the steel bridge deck, multiple groups of ultrasonic guided wave rectangular sensor arrays are evenly arranged, and each group of sensor arrays includes 8 ultrasonic guided wave sensors. See Figure 2 and Figure 3 , which includes: steel bridge deck paving system 1, steel bridge deck 2, U-shaped stiffening rib 3, ultrasonic guided wave sensor array 4, signal cable 5, ultrasonic guided wave excitation acquisition and processing platform 6, and ultrasonic guided wave sensor 7.

[0061] Use the ultrasonic guided wave excitation acquisition and processing platform to simultaneously excite and receive N times for 8 ultrasonic guided wave sensors in the rectangular sensor array, forming 8×N groups of first guided wave signals. The ultrasonic guided wave excitation acquisition and processing platform performs zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through the zeroing time window, obtains the envelope curve of the first zeroing transformation signal after the zeroing transformation, determines the first envelope curve, and further obtains the signal amplitude superposition matrix. Image processing is performed on the mapped color values of the signal amplitude superposition matrix, and 95% thresholding processing is performed on the image to complete defect location imaging using ultrasonic phased focusing technology.

[0062] The excitation signal selects a sine wave signal modulated by a HANNING window with relatively concentrated energy as the excitation signal. The expression of the excitation signal is as follows:

[0063]

[0064] where n is the number of sine wave periods, and f c is the center frequency of the signal.

[0065] The first guided wave signal is S(t). The zeroing transformation of the first guided wave signal is expressed as follows:

[0066] S w (t) = S(t) · w c (t);

[0067] where S w (t) is the first zeroing transformation signal; w c (t) is the zeroing transformation time window function, and its expression is as follows:

[0068]

[0069] where t c is the middle moment of the time window, and Δt is the width of the time window.

[0070] The monitoring area is meshed and discretized into a grid of A×B. For any grid (a, b), the coordinates of the grid center point are Z(x, y). The grid positions of the excitation sensor and the receiving sensor are T(x m , y m ) and R(x n , y n ), respectively. Calculate the distance matrix S ABmn corresponding to this grid for the excitation and receiving sensors, that is, the sum of the distances from this grid to the excitation and receiving sensors. The expression is as follows:

[0071]

[0072] See Figure 4, is a schematic diagram of a Hilbert transform algorithm case. The first zeroing transform signal S w (t) undergoes a Hilbert transform to obtain the first envelope curve SE of the signal ijN , and the expression is as follows:

[0073]

[0074] Distance matrix S abmn can be decomposed into a time index matrix T abmn and the group velocity V when detecting the center frequency of the signal g The product, and the expression is as follows:

[0075] S abmn = T abmn ×V g ;

[0076] The amplitude superposition C of all received sensor signals at the grid (a, b) ab The expression is:

[0077]

[0078] The amplitude superposition C ab is mapped to a color value, and after performing a 95% thresholding process on the image, it is the defect color map, and the defect location imaging result of the ultrasonic phased focusing technology is determined.

[0079] Step S2, alternately excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and use the synthetic aperture focusing technology to determine the defect location imaging result of the synthetic aperture focusing technology.

[0080] In some embodiments of the present application, the alternately exciting the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array and using the synthetic aperture focusing technology to determine the defect location imaging result of the synthetic aperture focusing technology includes:

[0081] Alternately excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and at the same time, the ultrasonic guided wave sensors receive, and through a zeroing time window, perform a zeroing transform on the initial wave packet and the boundary reflection wave packet in the received signal to determine the second zeroing transform signal.

[0082] According to the second zeroing transform signal, determine the second envelope curve, and determine the signal echo amplitude matrix according to the second envelope curve.

[0083] Perform imaging processing on the color value mapping of the signal echo amplitude matrix to determine the synthetic aperture focusing image, and perform an 80% thresholding process on the synthetic aperture focusing image to determine the defect location imaging result of the synthetic aperture focusing technology.

[0084] Specifically, an ultrasonic guided wave excitation acquisition and processing platform is used to perform joint defect location imaging on the defect location imaging results of ultrasonic phased array focusing technology and the defect location imaging results of synthetic aperture focusing technology.

[0085] The ultrasonic guided wave excitation acquisition and processing platform alternately excites the 1st to 8th ultrasonic guided wave sensors in the rectangular sensor array, and at the same time, the 1st to 8th ultrasonic guided wave sensors receive signals, forming 8×8 groups of second guided wave signals. The ultrasonic guided wave excitation acquisition and processing platform performs a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window, obtains the envelope curve of the second zeroing transformation signal after the zeroing transformation, determines the second envelope curve, and further obtains the signal echo amplitude matrix. The color values are mapped for the signal amplitude matrix for imaging processing, and the image is thresholded at 80% to complete the defect location imaging using synthetic aperture focusing technology.

[0086] The second guided wave signal is S′(t), and the second zeroing transformation signal S′ w (t) after performing the zeroing transformation on the second guided wave signal is obtained, and then the second envelope curve SE′ ijN is obtained.

[0087] The monitoring area is meshed and discretized into a grid of A×B. For any grid (a, b), the coordinates of the grid center point are Z(x, y), then the echo amplitude of the grid (a, b) is E(a, b), and its expression is as follows:

[0088]

[0089] where f ij (t) is the guided wave signal excited by the i-th sensor and received by the j-th sensor, and V g is the group velocity of the ultrasonic guided wave.

[0090] E(a, b) is mapped to color values, and after thresholding the image at 80%, it is the defect color map.

[0091] Step S3: According to the defect location imaging results of the ultrasonic phased array focusing technology and the defect location imaging results of the synthetic aperture focusing technology, perform joint defect location imaging to detect hidden fatigue cracks.

[0092] Specifically, the defect location result of the ultrasonic phased array focusing technology is (x d , y d ), and the defect location result of the synthetic aperture focusing technology is Then the expression for joint defect location is:

[0093]

[0094] Among them, ((0.487x d +(1-0.487)x′ d ), (0.434y d +(1-0.434)y′ d )) is the joint defect location formula when the defect is a hole, ((0.654x d +(1-0.654x′ d ), (0.722y d +(1-0.722)y′ d )) is the combined defect location formula when the defect is a crack.

[0095] See also Figure 5 and Figure 6 , respectively, are a comparison diagram of the X-coordinate results of defect positioning when the defect is a hole in the field embodiment, and a comparison diagram of the Y-coordinate results of defect positioning when the defect is a hole in the field embodiment. It can be seen that this embodiment can effectively locate defects.

[0096] This embodiment can achieve high-precision detection of damage locations and evaluation of the bonding state between the pavement and the steel plate.

[0097] The above-mentioned embodiment of the present application discloses a method for monitoring the health of a steel bridge deck pavement system. The method makes full use of the fact that ultrasonic guided waves can propagate over long distances in waveguide structures such as plate-like structures with little energy loss, and that ultrasonic guided waves are relatively sensitive to tiny damages. A plurality of ultrasonic guided wave sensors are embedded in the steel bridge deck pavement to form an ultrasonic guided wave rectangular sensor array, wherein each ultrasonic guided wave sensor can be used as both a transmitting sensor and a receiving sensor. The ultrasonic guided wave sensors are stimulated and controlled to generate ultrasonic guided waves, and signals are generated by automatically switching multiple sensors in the ultrasonic guided wave rectangular sensor array. Defects are accurately located by a joint positioning imaging technology based on ultrasonic phased focusing technology and synthetic aperture focusing technology, and signal amplitude analysis is mapped to color value imaging to detect hidden fatigue cracks, thereby evaluating the status of the steel bridge deck pavement system.

[0098] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0099] The following is an embodiment of the device of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the device embodiment of the present application, please refer to the method embodiment of the present application.

[0100] The second embodiment of the present application discloses a health monitoring device for a steel bridge deck pavement system. The health monitoring device for the steel bridge deck pavement system is applied to the health monitoring method for the steel bridge deck pavement system disclosed in the first embodiment of the present application. Refer to Figure 7 the structural schematic diagram shown, the health monitoring device for the steel bridge deck pavement system includes:

[0101] An ultrasonic phased array focusing processing module 10, configured to simultaneously excite and receive ultrasonic guided wave sensors in a pre-set ultrasonic guided wave rectangular sensor array multiple times, and use ultrasonic phased array focusing technology to determine the defect location imaging result of ultrasonic phased array focusing technology. Among them, the ultrasonic guided wave rectangular sensor array is arranged at the bottom of the pavement layer in the wheel path of the steel bridge deck and in the middle position between two wheel paths, and is arranged on the top of the steel bridge deck. Among them, multiple groups of ultrasonic guided wave rectangular sensor arrays are arranged, and each group of ultrasonic guided wave rectangular sensor arrays includes multiple ultrasonic guided wave sensors.

[0102] A synthetic aperture focusing processing module 20, configured to alternately excite ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and use synthetic aperture focusing technology to determine the defect location imaging result of synthetic aperture focusing technology.

[0103] A health status monitoring module 30, configured to perform joint defect location imaging according to the defect location imaging result of ultrasonic phased array focusing technology and the defect location imaging result of synthetic aperture focusing technology, and detect hidden fatigue cracks.

[0104] In some embodiments of the present application, the ultrasonic phased array focusing processing module 10 includes:

[0105] A first excitation and reception unit, configured to simultaneously excite and receive ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array multiple times, and perform zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window to determine a first zeroing transformation signal.

[0106] A first matrix determination unit, configured to determine a first envelope curve according to the first zeroing transformation signal, and determine a signal amplitude superposition matrix according to the first envelope curve.

[0107] A first imaging unit, configured to perform imaging processing on the mapped color values of the signal amplitude superposition matrix to determine an ultrasonic phased array focused image, and perform 95% thresholding processing on the ultrasonic phased array focused image to determine the defect location imaging result of ultrasonic phased array focusing technology.

[0108] In some embodiments of the present application, the synthetic aperture focusing processing module 20 includes:

[0109] A second excitation and reception unit, configured to alternately excite the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, while the ultrasonic guided wave sensors receive signals, and perform a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signals through a zeroing time window to determine a second zeroing transformation signal.

[0110] A second matrix determination unit, configured to determine a second envelope curve according to the second zeroing transformation signal, and determine a signal echo amplitude matrix according to the second envelope curve.

[0111] A second imaging unit, configured to perform imaging processing on the color value mapped by the signal echo amplitude matrix to determine a synthetic aperture focused image, and perform 80% thresholding processing on the synthetic aperture focused image to determine an imaging result of defect localization by synthetic aperture focusing technology.

[0112] In some embodiments of the present application, the ultrasonic guided wave sensor is connected to an ultrasonic guided wave excitation acquisition and processing platform through a signal cable. The ultrasonic guided wave excitation acquisition and processing platform is configured to use ultrasonic phased focusing technology to determine an imaging result of defect localization by ultrasonic phased focusing technology, and is also configured to use synthetic aperture focusing technology to determine an imaging result of defect localization by synthetic aperture focusing technology.

[0113] In some embodiments of the present application, in the ultrasonic guided wave rectangular sensor array, the distance between any two ultrasonic guided wave sensors is less than 50 mm.

[0114] In some embodiments of the present application, the ultrasonic guided wave rectangular sensor array includes a single excitation and multiple reception functions and multiple excitation and multiple reception functions, and the ultrasonic guided wave sensor includes a simultaneous excitation and simultaneous reception function.

[0115] In some embodiments of the present application, any group of the ultrasonic guided wave rectangular sensor arrays includes 8 ultrasonic guided wave sensors.

[0116] The present application has been described in detail above in combination with specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present application. Those skilled in the art understand that without departing from the spirit and scope of the present application, various equivalent substitutions, modifications, or improvements can be made to the technical solutions and their implementation manners of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

Claims

1. A method for health monitoring of a steel bridge deck pavement system, characterized in that, Including: Simultaneously exciting and receiving ultrasonic guided wave sensors in a pre-set rectangular ultrasonic guided wave sensor array multiple times, and using ultrasonic phased array focusing technology to determine the defect location imaging result of ultrasonic phased array focusing technology. Among them, the rectangular ultrasonic guided wave sensor array is arranged at the bottom of the paving layer in the wheel path and the middle position between two wheel paths of the steel bridge deck, and is also arranged on the top of the steel bridge deck. Among them, multiple groups of the rectangular ultrasonic guided wave sensor arrays are provided, and each group of the rectangular ultrasonic guided wave sensor arrays includes multiple ultrasonic guided wave sensors; Sequentially exciting the ultrasonic guided wave sensors in the rectangular ultrasonic guided wave sensor array, and using synthetic aperture focusing technology to determine the defect location imaging result of synthetic aperture focusing technology; Based on the defect location imaging result of ultrasonic phased array focusing technology and the defect location imaging result of synthetic aperture focusing technology, performing joint defect location imaging to detect hidden fatigue cracks; The step of simultaneously exciting and receiving ultrasonic guided wave sensors in a pre-set rectangular ultrasonic guided wave sensor array multiple times and using ultrasonic phased array focusing technology to determine the defect location imaging result of ultrasonic phased array focusing technology includes: Simultaneously exciting and receiving ultrasonic guided wave sensors in the rectangular ultrasonic guided wave sensor array multiple times, and through a zeroing time window, performing zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal to determine the first zeroing transformation signal; Based on the first zeroing transformation signal, determining the first envelope curve, and determining the signal amplitude superposition matrix according to the first envelope curve; Performing imaging processing on the color value mapping of the signal amplitude superposition matrix to determine the ultrasonic phased array focusing image, and performing 95% thresholding processing on the ultrasonic phased array focusing image to determine the defect location imaging result of ultrasonic phased array focusing technology; The step of sequentially exciting the ultrasonic guided wave sensors in the rectangular ultrasonic guided wave sensor array and using synthetic aperture focusing technology to determine the defect location imaging result of synthetic aperture focusing technology includes: Sequentially exciting the ultrasonic guided wave sensors in the rectangular ultrasonic guided wave sensor array, while the ultrasonic guided wave sensors are receiving, and through a zeroing time window, performing zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal to determine the second zeroing transformation signal; Based on the second zeroing transformation signal, determining the second envelope curve, and determining the signal echo amplitude matrix according to the second envelope curve; Performing imaging processing on the color value mapping of the signal echo amplitude matrix to determine the synthetic aperture focusing image, and performing 80% thresholding processing on the synthetic aperture focusing image to determine the defect location imaging result of synthetic aperture focusing technology.

2. The health monitoring method for the steel bridge deck pavement system according to claim 1, characterized in that, The ultrasonic guided wave sensors are connected to an ultrasonic guided wave excitation acquisition and processing platform through signal cables. The ultrasonic guided wave excitation acquisition and processing platform is used to determine the defect location imaging result of ultrasonic phased array focusing technology by using ultrasonic phased array focusing technology, and is also used to determine the defect location imaging result of synthetic aperture focusing technology by using synthetic aperture focusing technology.

3. The health monitoring method for the steel bridge deck pavement system according to claim 1, characterized in that In the rectangular ultrasonic guided wave sensor array, the distance between any two ultrasonic guided wave sensors is less than 50 mm.

4. The method for health monitoring of the steel bridge deck pavement system according to claim 1, characterized in that, The ultrasonic guided wave rectangular sensor array includes single excitation and multiple reception functions and multiple excitation and multiple reception functions, and the ultrasonic guided wave sensor includes simultaneous excitation and simultaneous reception functions.

5. The method for health monitoring of the steel bridge deck pavement system according to claim 1, characterized in that, Any group of the ultrasonic guided wave rectangular sensor arrays includes 8 ultrasonic guided wave sensors.

6. A health monitoring device for a steel bridge deck pavement system, characterized in that, The steel bridge deck pavement system health monitoring device is applied to the steel bridge deck pavement system health monitoring method according to any one of claims 1-5. The steel bridge deck pavement system health monitoring device includes: An ultrasonic phased array focusing processing module for simultaneously exciting and receiving the ultrasonic guided wave sensors in the pre-set ultrasonic guided wave rectangular sensor array multiple times, and using the ultrasonic phased array focusing technology to determine the defect location imaging result of the ultrasonic phased array focusing technology. Among them, the ultrasonic guided wave rectangular sensor array is arranged at the bottom of the pavement layer in the wheel path area of the steel bridge deck and in the middle position between two wheel paths, and is arranged on the top of the steel bridge deck. Among them, multiple groups of ultrasonic guided wave rectangular sensor arrays are arranged, and each group of ultrasonic guided wave rectangular sensor arrays includes multiple ultrasonic guided wave sensors; A synthetic aperture focusing processing module for alternately exciting the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, and using the synthetic aperture focusing technology to determine the defect location imaging result of the synthetic aperture focusing technology; A health status monitoring module for performing joint defect location imaging based on the defect location imaging result of the ultrasonic phased array focusing technology and the defect location imaging result of the synthetic aperture focusing technology to detect hidden fatigue cracks.

7. The health monitoring device for steel bridge deck pavement system according to claim 6, characterized in that, The ultrasonic phased array focusing processing module includes: A first excitation and reception unit for simultaneously exciting and receiving the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array multiple times, and performing a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window to determine a first zeroing transformation signal. A first matrix determination unit for determining a first envelope curve according to the first zeroing transformation signal, and determining a signal amplitude superposition matrix according to the first envelope curve; A first imaging unit for performing imaging processing on the color value mapped by the signal amplitude superposition matrix to determine an ultrasonic phased array focusing image, and performing a 95% thresholding process on the ultrasonic phased array focusing image to determine the defect location imaging result of the ultrasonic phased array focusing technology.

8. The health monitoring device for steel bridge deck pavement system according to claim 6, characterized in that, The synthetic aperture focusing processing module includes: A second excitation and reception unit for alternately exciting the ultrasonic guided wave sensors in the ultrasonic guided wave rectangular sensor array, while the ultrasonic guided wave sensors perform reception, and performing a zeroing transformation on the initial wave packet and the boundary reflection wave packet in the received signal through a zeroing time window to determine a second zeroing transformation signal; A second matrix determination unit for determining a second envelope curve according to the second zeroing transformation signal, and determining a signal echo amplitude matrix according to the second envelope curve; A second imaging unit for performing imaging processing on the color value mapped by the signal echo amplitude matrix to determine a synthetic aperture focusing image, and performing an 80% thresholding process on the synthetic aperture focusing image to determine the defect location imaging result of the synthetic aperture focusing technology.

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