UWB-based concrete protection layer thickness detection device, method and system

Abstract

The invention provides a UWB-based concrete protection layer thickness detection device, method and system, and relates to the technical field of concrete thickness detection. The concrete protection layer thickness detection device based on UWB comprises a UWB sensor which is used for transmitting a UWB pulse signal to a concrete protection layer and receiving a UWB pulse reflection signal reflected back from the concrete protection layer; and the controller is used for calculating the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculating the thickness of the concrete protection layer in combination with the wave velocity of the UWB pulse signal. The method has the advantages of high positioning precision, high time resolution, good environmental interference resistance and low emission power requirement, and can comprehensively improve the detection precision.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete detection, and in particular relates to a UWB-based concrete cover thickness detection device, method and system. Background Art

[0002] In the design and construction of concrete structures, the protective layer plays a vital role. It forms a defensive barrier around the steel bars, effectively preventing external corrosion factors such as moisture, chloride salts and oxygen from corroding the steel bars, ensuring the durability and integrity of the structure. The appropriate thickness of the protective layer can extend the service life of the structure, reduce maintenance costs, and maintain the bearing capacity of the structure. However, if the protective layer is too thin or uneven, it may cause premature corrosion of the steel bars and affect the safety of the structure.

[0003] Traditional methods for assessing the thickness of the protective layer include drilling measurements, pull-out tests, or the use of nuclear magnetic resonance and other technologies. These methods not only require complex equipment and highly skilled technicians to operate, but are also significantly invasive and may cause unnecessary damage to the concrete structure. In addition, these traditional detection methods are usually time-consuming, and it often takes days or even weeks from data collection to final result analysis, which is not conducive to rapid decision-making and adjustment of construction schedules in emergency situations. At the same time, the economic cost is also high, especially in large-scale engineering projects, where frequent inspections and high equipment investment become a heavy burden on the project budget.

[0004] In view of this, it is particularly important to develop a non-invasive detection technology that can quickly and accurately evaluate the thickness of the protective layer. Such a technology can provide key thickness information in a timely manner, helping engineers and construction personnel to monitor the quality of the project in real time and take maintenance measures in time to ensure the long-term stability and safety of the structure. In addition, the application of non-invasive detection technology can significantly reduce the impact of the detection process on the structure and the environment, while reducing the investment in manpower and material resources, making the entire engineering detection process more economical and efficient. Therefore, exploring and realizing this technology has far-reaching significance for the development of modern concrete structure engineering.

[0005] However, the inventors found that existing non-invasive detection technologies for concrete often have problems such as low positioning accuracy, low time resolution, poor resistance to environmental interference, high transmission power requirements, and low portability. Considering the construction and working environment of concrete, the existing technology has certain limitations in detection accuracy. Summary of the invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a UWB-based concrete protective layer thickness detection device, method and system, which use UWB pulse signals to detect the thickness of the concrete protective layer. When the UWB pulse signal encounters an obstacle in the concrete (such as steel bars), the UWB pulse reflection signal is returned. The thickness of the concrete protective layer is detected based on UWB technology. It has the advantages of high positioning accuracy, high time resolution, good anti-environmental interference ability, and low transmission power requirement, and can comprehensively improve the detection accuracy.

[0007] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0008] A first aspect of the present invention provides a UWB-based concrete cover thickness detection device.

[0009] The UWB-based concrete cover thickness detection device includes:

[0010] A UWB sensor is used to transmit a UWB pulse signal to the concrete protective layer and receive a UWB pulse reflection signal reflected from the concrete protective layer;

[0011] The controller is used to calculate the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the concrete protective layer in combination with the wave speed of the UWB pulse signal.

[0012] As an optional technical solution, the UWB sensor includes a UWB pulse generator and a UWB pulse receiver, the UWB pulse generator is used to transmit a UWB pulse signal to the concrete protective layer, and the UWB pulse receiver is used to receive a UWB pulse reflection signal reflected from the concrete protective layer.

[0013] As an optional technical solution, the UWB pulse signal emitted by the UWB sensor needs to cover all areas to be detected, the bandwidth of the UWB pulse signal is greater than 500 MHz, and the daily carrier center frequency is greater than 2.5 GHZ.

[0014] As an optional technical solution, the controller is also used for:

[0015] Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in concrete;

[0016] The product of the one-way propagation time of the UWB pulse signal in the concrete and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the concrete protective layer.

[0017] As an optional technical solution, the controller is also used for:

[0018] The UWB sensor is used to perform a control test on a standard sample with a known actual thickness to obtain the test thickness of the standard sample;

[0019] The error between the test thickness of the standard sample and the actual thickness is calculated. When the error is within the preset range, the UWB sensor is used to monitor the thickness of the concrete cover.

[0020] As an optional technical solution, the UWB sensor is signal-connected or electrically connected to the controller.

[0021] As an optional technical solution, it also includes a graphical user interface, which is electrically connected to the controller and is used to display the thickness of the concrete protective layer and a graphical interface in real time. The graphical interface includes a cross-sectional view, a two-dimensional or three-dimensional mapping view of the concrete protective layer.

[0022] A second aspect of the present invention provides a method for detecting the thickness of a concrete protective layer based on UWB.

[0023] The UWB-based concrete cover thickness detection method includes the following steps:

[0024] Transmitting UWB pulse signals to the concrete cover;

[0025] Receive the UWB pulse reflection signal reflected from the concrete cover;

[0026] Based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, the one-way propagation time of the UWB pulse signal in the concrete is calculated, and combined with the wave velocity of the UWB pulse signal, the thickness of the concrete protective layer is calculated.

[0027] As an optional technical solution:

[0028] Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in concrete;

[0029] The product of the one-way propagation time of the UWB pulse signal in the concrete and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the concrete protective layer.

[0030] A third aspect of the present invention provides a UWB-based concrete cover thickness detection system.

[0031] The UWB-based concrete cover thickness detection system includes:

[0032] The pulse signal transmitting and receiving module is configured to: transmit a UWB pulse signal to the concrete protective layer, and receive a UWB pulse reflection signal reflected from the concrete protective layer;

[0033] The concrete thickness calculation module is configured to calculate the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the concrete protective layer in combination with the wave velocity of the UWB pulse signal.

[0034] One or more of the above technical solutions have the following beneficial effects:

[0035] (1) The present invention provides a UWB-based concrete protective layer thickness detection device, method and system, which uses a UWB pulse signal to detect the thickness of the concrete protective layer. When the UWB pulse signal encounters an obstacle in the concrete (such as a steel bar), the UWB pulse reflection signal is returned, and the one-way propagation time of the UWB pulse signal in the concrete is calculated. In combination with the wave velocity of the UWB pulse signal, the thickness of the concrete protective layer is calculated. The present invention realizes the detection of the thickness of the concrete protective layer based on UWB technology, has the advantages of high positioning accuracy, high time resolution, good anti-environmental interference ability, and low transmission power requirement, and can comprehensively improve the detection accuracy.

[0036] (2) In terms of positioning accuracy, compared with the prior art using narrowband communication technology for thickness detection, the present invention can achieve millimeter-level precise positioning with high positioning accuracy, thereby improving measurement accuracy.

[0037] (3) In terms of time resolution, compared with the prior art that uses ultrasonic positioning technology to perform thickness detection, the present invention uses UWB signals to complete transmission at the nanosecond level, and has a high time resolution.

[0038] (4) In terms of anti-interference performance, compared with the prior art method of using narrowband communication technology and ultrasonic signal detection, the performance of narrowband communication technology deteriorates in a strong interference environment, and ultrasonic signals are easily blocked by walls and objects in the space, while the ultra-wide bandwidth of UWB enables it to transmit signals even in a low signal-to-noise ratio environment.

[0039] (5) In terms of energy efficiency, compared with the current situation where traditional technologies have limitations in energy efficiency and require higher transmission power, the present invention utilizes the high energy efficiency of UWB technology and can transmit over longer distances with lower transmission power.

[0040] (6) In terms of user experience, users of the prior art may need to carry additional equipment or tags, while the UWB technology used in the present invention can be integrated into common devices such as smart phones. It has strong practicality and portability. The equipment is portable and easy to operate, making it easy for on-site construction personnel to use, thereby improving user experience.

[0041] (7) The present invention provides a high-precision non-invasive detection method that will not cause damage to the concrete structure, has a fast detection speed, can achieve real-time monitoring, reduces detection costs, and improves engineering efficiency.

[0042] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0044] Figure 1 It is a schematic diagram of the overall structural layout of the first embodiment.

[0045] Figure 2 This is a flow chart of the method of the second embodiment.

[0046] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0047] 1. Concrete, 2. Steel bars, 3. Base, 4. Fixing device, 5. UWB pulse generator, 6. UWB pulse receiver. DETAILED DESCRIPTION

[0048] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0049] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0050] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0051] Embodiment 1

[0052] This embodiment discloses a device for detecting the thickness of a concrete protective layer 1 based on UWB.

[0053] like Figure 1As shown, the UWB-based concrete 1 protective layer thickness detection device can quickly and accurately evaluate the protective layer thickness of the concrete 1 structure without causing any damage to the structure. Specifically, it may include:

[0054] A UWB sensor is used to transmit a UWB pulse signal to the concrete 1 protective layer and receive a UWB pulse reflection signal reflected from the concrete 1 protective layer;

[0055] The controller is used to calculate the one-way propagation time of the UWB pulse signal in the concrete 1 based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the protective layer of the concrete 1 in combination with the wave velocity of the UWB pulse signal.

[0056] It can be understood that the UWB sensor is signal-connected or electrically connected to the controller.

[0057] like Figure 1 As shown, there is a steel bar 2 structure in the concrete 1 protective layer. The concrete 1 protective layer in this embodiment is to protect the internal steel bar 2 structure. This embodiment uses a UWB-based concrete 1 protective layer thickness detection device to detect the thickness of the concrete 1 protective layer to achieve detection purposes such as whether the thickness of the concrete 1 protective layer is consistent at various locations and whether the thickness of the concrete 1 protective layer meets the standard.

[0058] The UWB sensor includes a UWB pulse generator 5 and a UWB pulse receiver 6. Figure 1 The array distribution is presented in the form of a signal receiving array. In order to facilitate the installation of the UWB pulse generator 5 and the UWB pulse receiver 6, a base 3 and a fixing device 4 are also provided. The base 3 is used to carry the UWB pulse generator 5 and the UWB pulse receiver 6. The UWB pulse generator 5 and the UWB pulse receiver 6 are both provided on the base 3; the fixing device 4 is connected to the protective layer of the concrete 1 to be detected, and forms a certain limit and support effect on the protective layer of the concrete 1, so as to facilitate the UWB pulse generator 5 and the UWB pulse receiver 6 to transmit the pulse signal and receive the reflected signal.

[0059] Specifically, the UWB pulse generator 5 is used to transmit a UWB pulse signal to the protective layer of concrete 1, and the UWB pulse receiver 6 is used to receive the UWB pulse reflection signal reflected from the protective layer of concrete 1. The thickness of the protective layer of concrete 1 is detected by using the UWB pulse signal and the UWB pulse reflection signal. Figure 1 In the measurement of H height, H represents the thickness of concrete 1 protective layer.

[0060] It can be understood that in order to achieve more accurate detection, the UWB pulse signal emitted by the UWB sensor needs to cover all areas to be detected. After the UWB pulse signal is emitted by the UWB sensor, the UWB pulse signal will propagate in the concrete 1 protective layer until it encounters an obstacle in the concrete 1 protective layer. In this embodiment, the obstacle is the steel bar 2 structure. The interface formed between the concrete 1 and the steel bar 2 will reflect the UWB pulse signal. The signal (UWB pulse reflection signal) reflected by the interface formed between the concrete 1 and the steel bar 2 will return to the direction and continue to propagate in the concrete 1 protective layer. The UWB pulse reflection signal is in the opposite direction to the UWB pulse signal emitted at the beginning. These UWB pulse reflection signals carry key information about the medium characteristics and interface position. The subsequent controller uses this information to calculate the thickness of the protective layer.

[0061] The frequency and power of the UWB pulse signal can be adjusted according to the actual application scenario and the characteristics of the concrete 1 to ensure the best penetration ability and signal quality. In this embodiment, the bandwidth of the UWB pulse signal is >500MHz, and the carrier center frequency is >2.5GHZ.

[0062] Frequency range: 3.1GHZ~10.6GHZ;

[0063] System power consumption: 1mw~4mW;

[0064] Pulse width: 0.2ns~1.5ns

[0065] Repeat period: 25ns~1ms;

[0066] Transmitting power: <-41.3dBm / MHZ

[0067] Data rate: tens to hundreds of Mb / s,

[0068] Decomposition of multipath delay: ≤1ns;

[0069] Multipath fading: ≤5dB

[0070] System capacity: much higher than 3G system

[0071] Space capacity: 1000kb / m 2

[0072] When specifically calculating the thickness of the protective layer of concrete 1, the controller is also used to:

[0073] Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in the concrete 1;

[0074] The product of the one-way propagation time of the UWB pulse signal in the concrete 1 and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the protective layer of the concrete 1 .

[0075] The wave velocity of the UWB pulse signal in the concrete 1 is a known quantity, usually about 0.8 to 1.2 m / ns.

[0076] Specifically, when UWB pulse signals are sent into concrete 1, they propagate at a known wave speed. When these pulses encounter interfaces with different electromagnetic properties, such as the interface between concrete 1 and air or steel bars 2, they are reflected back. By measuring the total time for the signal to go back and forth and dividing it by two (because the signal travels a round-trip distance), the one-way propagation time of the signal in concrete 1 can be obtained. Then, by multiplying this time by the wave speed in concrete 1, the distance traveled by the signal can be obtained, which is the thickness of the protective layer.

[0077] In order to further improve the detection accuracy of the device of this embodiment, the controller is also used to:

[0078] The UWB sensor is used to perform a control test on a standard sample with a known actual thickness to obtain the test thickness of the standard sample;

[0079] The error between the test thickness of the standard sample and the actual thickness is calculated. When the error is within the preset range, the UWB sensor is used to monitor the thickness of the concrete 1 protective layer.

[0080] In order to facilitate improving the user experience, this embodiment also includes a graphical user interface, which is electrically connected to the controller and is used to display the thickness of the concrete 1 protective layer and a graphical interface in real time. The graphical interface includes a cross-sectional view, a two-dimensional or three-dimensional mapping view of the concrete 1 protective layer.

[0081] As shown in Table 1 below, the differences and advantages between the UWB pulse technology used in this embodiment and the traditional technology are demonstrated.

[0082] Table 1 shows the differences between the technology of this embodiment and the traditional technology

[0083]

[0084]

[0085] The UWB-based concrete 1 protective layer thickness detection device of this embodiment may include the following steps when used:

[0086] Step 1: Deploy a dense UWB sensor network on the concrete surface of the structure to be tested. These sensors are responsible for transmitting and receiving UWB signals, and their layout must be carefully designed to ensure that all areas that need to be tested are covered. The placement and spacing of the sensors will directly affect the accuracy of the measurement results.

[0087] Step 2: Use the high-precision UWB pulse generator 5 to emit an extremely short pulse signal.

[0088] These signals have extremely high time resolution and penetration, and can propagate through complex structures such as concrete1 without losing much energy. UWB technology allows signals to be sent and received over a wide spectrum, which means it has a high dynamic range and immunity to interference, thus ensuring high-precision measurements in practical applications.

[0089] The UWB pulse generator 5 is started to generate UWB signals of specific frequency and power. The frequency and power of these signals can be adjusted according to the actual application scenario and the characteristics of the concrete 1 to ensure the best penetration ability and signal quality.

[0090] Generally, 6Hz frequency and -50dBm / MHZ power are used. If the concrete thickness is large (>50cm), the frequency can be appropriately reduced (4-5Hz) and the power can be increased (-55 to -60dBm / MHZ).

[0091] The echo information is:

[0092]

[0093] Among them, m represents the pulse dimension (or slow time), n represents the distance dimension (or fast time), x[m,n] represents the current echo signal, y[m,n] represents the background estimation value of the historical echo signal, and z[m,n] represents the echo signal.

[0094] Step 3: Capture the signal reflected from the inside of the concrete 1 through the antenna array.

[0095] These antennas are optimized to efficiently collect reflected waves from interfaces at different depths, including those formed by the interface between concrete 1 and steel bars 2, which carry critical information about the properties of the medium and the location of the interface.

[0096] The step of collecting reflected UWB signals from interfaces at different depths requires a high degree of precision, because the signals reflected from each interface contain important information about the location of the material interface. Accurately capturing these signals through the antenna array is the key to subsequent analysis.

[0097] Step 4: Filter, amplify and digitize the collected signals.

[0098] The purpose of this stage is to improve the quality and readability of the signal, removing noise and other interfering factors so that useful signal features can be more clearly identified.

[0099] The thickness of concrete 1 is

[0100]

[0101] Where m represents the pulse dimension (or slow time), x[m,n] represents the current echo signal, and y ave,m It represents the thickness in m-dimensional pulse and average velocity dimension.

[0102] Step 5: Apply time domain or frequency domain analysis methods to extract signal features.

[0103] Advanced signal processing algorithms are used to analyze and interpret the captured UWB signals, Fourier transform is used to analyze the signal frequency components, and time series analysis is used to study the time characteristics of the signal. Through these analytical methods, the boundary of the concrete 1 protective layer can be accurately located.

[0104] By combining time domain and frequency domain analysis techniques, useful information in the reflected signal can be extracted. By filtering, amplifying, demodulating and digitalizing the signal, the boundary of the concrete 1 protective layer can be accurately identified, and the thickness of the protective layer can be inferred accordingly.

[0105] Step 6: Based on the known propagation speed of the UWB signal in the medium, determine the distance by calculating the signal round-trip time.

[0106] This step involves converting the time delay into a physical distance, taking into account the effect of the electromagnetic properties of concrete1 on the speed of signal propagation. Through precise time measurement and velocity correction, an accurate measure of the cover thickness can be obtained.

[0107] Specifically, the thickness of the protective layer is determined according to the propagation time of the signal and the wave velocity in the concrete 1 medium.

[0108] Step 7: Ensure measurement accuracy and repeatability through a calibration process.

[0109] Adjust and optimize system settings by performing control tests using standard samples of known thickness.

[0110] During the above process, all measurement data and analysis results are presented in real time through a graphical user interface, allowing users to intuitively observe and interpret the data, including detailed cross-sections, two-dimensional or three-dimensional maps.

[0111] Embodiment 2

[0112] This embodiment discloses a method for detecting the thickness of a concrete protective layer based on UWB.

[0113] like Figure 2 As shown, the UWB-based concrete cover thickness detection method includes the following steps:

[0114] Transmitting UWB pulse signals to the concrete cover;

[0115] Receive the UWB pulse reflection signal reflected from the concrete cover;

[0116] Based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, the one-way propagation time of the UWB pulse signal in the concrete is calculated, and combined with the wave velocity of the UWB pulse signal, the thickness of the concrete protective layer is calculated.

[0117] Further:

[0118] Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in concrete;

[0119] The product of the one-way propagation time of the UWB pulse signal in the concrete and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the concrete protective layer.

[0120] Also includes:

[0121] The UWB sensor is used to perform a control test on a standard sample with a known actual thickness to obtain the test thickness of the standard sample;

[0122] The error between the test thickness of the standard sample and the actual thickness is calculated. When the error is within the preset range, the UWB sensor is used to monitor the thickness of the concrete cover.

[0123] If the error is large and exceeds the preset range, the interpretation algorithm is optimized until the error is within the preset range. The interpretation algorithm and the optimization of the interpretation algorithm here can use the methods in the prior art, which will not be elaborated in this embodiment.

[0124] Embodiment 3

[0125] This embodiment discloses a UWB-based concrete cover thickness detection system.

[0126] The UWB-based concrete cover thickness detection system includes:

[0127] The pulse signal transmitting and receiving module is configured to: transmit a UWB pulse signal to the concrete protective layer, and receive a UWB pulse reflection signal reflected from the concrete protective layer;

[0128] The concrete thickness calculation module is configured to calculate the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the concrete protective layer in combination with the wave velocity of the UWB pulse signal.

[0129] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. UWB-based concrete cover thickness detection device, characterized in that: include: A UWB sensor is used to transmit a UWB pulse signal to the concrete protective layer and receive a UWB pulse reflection signal reflected from the concrete protective layer; The controller is used to calculate the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the concrete protective layer in combination with the wave speed of the UWB pulse signal.

2. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: The UWB sensor comprises a UWB pulse generator and a UWB pulse receiver. The UWB pulse generator is used to transmit a UWB pulse signal to the concrete protective layer, and the UWB pulse receiver is used to receive a UWB pulse reflection signal reflected from the concrete protective layer.

3. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: The UWB pulse signal emitted by the UWB sensor needs to cover all areas to be detected, the bandwidth of the UWB pulse signal is >500MHz, and the daily carrier center frequency is >2.5GHZ.

4. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: The controller is also used for: Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in concrete; The product of the one-way propagation time of the UWB pulse signal in the concrete and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the concrete protective layer.

5. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: The controller is also used for: The UWB sensor is used to perform a control test on a standard sample with a known actual thickness to obtain the test thickness of the standard sample; The error between the test thickness of the standard sample and the actual thickness is calculated. When the error is within the preset range, the UWB sensor is used to monitor the thickness of the concrete cover.

6. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: The UWB sensor is signal-connected or electrically connected to the controller.

7. The UWB-based concrete cover thickness detection device according to claim 1, characterized in that: It also includes a graphical user interface, which is electrically connected to the controller and is used to display the thickness of the concrete protection layer and a graphical interface in real time. The graphical interface includes a cross-sectional view, a two-dimensional or three-dimensional mapping view of the concrete protection layer.

8. The UWB-based concrete cover thickness detection method is characterized by: The following steps are involved: Transmitting UWB pulse signals to the concrete cover; Receive the UWB pulse reflection signal reflected from the concrete cover; Based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, the one-way propagation time of the UWB pulse signal in the concrete is calculated, and combined with the wave velocity of the UWB pulse signal, the thickness of the concrete protective layer is calculated.

9. The UWB-based concrete cover thickness detection method according to claim 8, characterized in that: Calculate half of the difference between the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal to obtain the one-way propagation time of the UWB pulse signal in concrete; The product of the one-way propagation time of the UWB pulse signal in the concrete and the wave velocity of the UWB pulse signal is calculated to obtain the thickness of the concrete protective layer.

10. UWB-based concrete cover thickness detection system, characterized in that: include: The pulse signal transmitting and receiving module is configured to: transmit a UWB pulse signal to the concrete protective layer, and receive a UWB pulse reflection signal reflected from the concrete protective layer; The concrete thickness calculation module is configured to calculate the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculate the thickness of the concrete protective layer in combination with the wave velocity of the UWB pulse signal.

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