A structural deformation detection sensor, detection system and detection method

Abstract

The present invention relates to a structural deformation detection sensor and a detection system and a detection method, and belongs to the field of structural deformation detection. The structural deformation detection sensor includes: a first fixed seat, a first dielectric substrate is provided on the first fixed seat, and a first microstrip circuit is provided at one end of the first dielectric substrate; a second fixed seat, the second fixed seat is arranged in parallel with the first fixed seat, a second dielectric substrate is provided on the second fixed seat, and a second microstrip circuit is provided at one end of the second dielectric substrate, the second microstrip circuit faces the first microstrip circuit, and a mutual inductance coupling gap is left between the first microstrip circuit and the second microstrip circuit. The effect of the structural deformation detection sensor is that it can simply, conveniently and quickly detect small structural deformations, with high detection accuracy, low detection cost, low energy consumption, and is conducive to detection operations.

Description

Technical Field

[0001] The present invention belongs to the field of structural deformation detection, and in particular relates to a structural deformation detection sensor, a detection system and a detection method. Background Art

[0002] Structural deformation refers to the relative displacement inside the structure after the structure is deformed or loosened. Generally speaking, as the relative displacement occurs, stress will continue to accumulate inside the structure, causing it to be damaged. Therefore, timely monitoring of structural deformation information is crucial to preventing structural failure and ensuring the reliability and safety of the structure.

[0003] At present, the use of laser displacement sensors and other technologies to monitor the micro displacement of structures has been reported in China. However, this monitoring method has complex circuits and high costs. At the same time, the development of buildings and other structures has led to a variety of structural changes, which has put forward difficult and complex requirements for structural deformation monitoring. Therefore, there is an urgent need for a simple, low-cost, and high-accuracy sensor to detect structural deformation. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a structural deformation detection sensor, a detection system and a detection method, which can simply, conveniently and quickly detect tiny structural deformations, have high detection accuracy, low detection cost, low energy consumption, and are conducive to detection operations.

[0005] The technical solution of the present invention for solving the above technical problems is as follows: A structural deformation detection sensor comprises: a first fixing seat, a first dielectric substrate is provided on the first fixing seat, and a first microstrip circuit is provided at one end of the first dielectric substrate; a second fixing seat, the second fixing seat is arranged parallel to the first fixing seat, a second dielectric substrate is provided on the second fixing seat, and a second microstrip circuit is provided at one end of the second dielectric substrate, the second microstrip circuit faces the first microstrip circuit, and a mutual inductance coupling gap is left between the first microstrip circuit and the second microstrip circuit.

[0006] The beneficial effect of the structural deformation detection sensor is: by installing the first fixing seat and the second fixing seat at the easily deformed position and the non-deformed position respectively, a mutual inductance coupling gap is left between the first microstrip circuit and the second microstrip circuit. When the structural deformation occurs, the first fixing seat or the second fixing seat moves accordingly, so that the mutual inductance coupling gap changes, and the structural deformation is detected by detecting the change of the mutual inductance coupling gap. The detection is performed by this detection sensor with high detection accuracy, and is not easily interfered by other detections. At the same time, the detection cost is low. The detection sensor has a simple structure and is easy to manufacture. The manufacturing cost is also low, which can improve the efficiency of structural deformation detection.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a first inner cavity is provided in the first fixing seat, a first opening is provided on one side of the first fixing seat, the first opening is communicated with the first inner cavity, the first dielectric substrate is provided in the first inner cavity, and one end of the first dielectric substrate provided with the first microstrip circuit extends out of the first fixing seat from the first opening.

[0009] The beneficial effect of adopting the above further solution is that the first dielectric substrate can be protected by the first fixing seat, so that the service life of the detection sensor is longer.

[0010] Furthermore, a second inner cavity is provided in the second fixing seat, a second opening is provided on one side of the second fixing seat, the second opening is communicated with the second inner cavity, the second dielectric substrate is provided in the second inner cavity, and one end of the second dielectric substrate provided with the second microstrip circuit extends out of the second fixing seat from the second opening.

[0011] The beneficial effect of adopting the above further solution is that the second dielectric substrate can be protected by the second fixing seat, and the service life of the detection sensor is extended.

[0012] Furthermore, the first microstrip circuit includes a plurality of first rectangular grooves, which are arranged in an array, and each of the first rectangular grooves is provided with two first metal strips arranged opposite to each other, and the two first metal strips are bent and arranged in the corresponding first rectangular grooves, and the two first metal strips are fixedly connected to the inner wall of the corresponding first rectangular groove.

[0013] The beneficial effect of adopting the above further solution is that the artificial plasmon structure is formed by bending the first metal strip, so that the electric field can be formed in a concentrated manner, and the detection accuracy is higher.

[0014] Furthermore, the second microstrip circuit includes a plurality of second rectangular grooves, which are arranged in an array, and each of the second rectangular grooves is provided with two second metal strips arranged opposite to each other, and the two second metal strips are bent and arranged in the corresponding second rectangular grooves, and the two second metal strips are fixedly connected to the inner wall of the corresponding second rectangular groove.

[0015] The beneficial effect of adopting the above further solution is that the artificial plasmon structure is formed by bending the second metal strip, so that the electric field can be formed in a concentrated manner, and the detection accuracy is higher.

[0016] Furthermore, the mutual inductance coupling gap has a value of 0-10 mm.

[0017] The beneficial effect of adopting the above further solution is: improving the detection accuracy.

[0018] The present invention also provides a structural deformation detection system, comprising the above-mentioned structural deformation detection sensor, a microwave transceiver antenna and a carrier, wherein the microwave transceiver antenna is connected to the carrier, and the transmitting end of the microwave transceiver antenna is directed toward the mutual inductance coupling gap between the first microstrip circuit and the second microstrip circuit.

[0019] The beneficial effects of the structural deformation detection system are: by emitting microwaves and receiving reflected waves through the microwave transceiver antenna, it is possible to detect whether the mutual inductance coupling gap has changed, and the structural deformation can be accurately detected. At the same time, the microwave transceiver antenna is driven to move by the carrier, which can improve the detection efficiency of structural deformation detection. Compared with the existing detection systems, the detection system is convenient, has high detection accuracy and efficiency, and has low detection cost, which is conducive to promotion and use.

[0020] Based on the above technical solution, the present invention can also be improved as follows.

[0021] Furthermore, the microwave transceiver antenna includes a microwave substrate, a metal patch and an antenna feed line, one side of the metal patch is attached to a side surface of the microwave substrate, the antenna feed line is fixedly connected to the microwave substrate, and the metal patch is provided with an emitting groove, the emitting groove is in the shape of a long strip, and the emitting groove is directly facing the mutual inductance coupling gap between the first microstrip circuit and the second microstrip circuit.

[0022] The beneficial effect of adopting the above further solution is that the microwaves emitted by the microwave transceiver antenna are concentrated to reach the mutual inductance coupling gap, thereby improving the detection accuracy.

[0023] Furthermore, the vehicle is a remote-controlled car or a drone.

[0024] The beneficial effect of adopting the above further scheme is: by moving a remote-controlled car or drone carrying a microwave transceiver antenna, detection can be carried out in small places or places such as the outer walls of a house that are not easily accessible to humans, thereby making the detection range of structural deformation wider and more conducive to promotion and application.

[0025] The present invention also provides a detection method using the above structural deformation detection system, comprising the following steps:

[0026] S1. Install the first fixing seat and the second fixing seat on both sides of the detection position respectively, and arrange the first microstrip circuit and the second microstrip circuit opposite to each other, and leave a mutual inductance coupling gap between the first microstrip circuit and the second microstrip circuit;

[0027] S2, driving the microwave transceiver antenna to move to the front of the mutual inductance coupling slot by the carrier, starting the microwave transceiver antenna to transmit microwaves, and the mutual inductance coupling slot generates reflected waves after receiving the microwaves;

[0028] S3. Detect the reflected wave in step S2, draw a reflection curve to obtain the resonance frequency point, and when the resonance frequency point drifts, it indicates that structural deformation occurs.

[0029] The beneficial effects of this detection method are: the detection accuracy is improved and the detection cost is reduced. The microwaves emitted by the microwave transceiver antenna are coordinated with the detection sensor. When structural deformation occurs, it can be detected in time, the detection efficiency is higher, the excessive conditions of the laser detection method are no longer required, and the detection is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the structural deformation detection sensor of the present invention;

[0031] Figure 2 It is a front cross-sectional view of the structural deformation detection sensor of the present invention;

[0032] Figure 3 It is a schematic diagram of the local structure of the first microstrip circuit of the present invention;

[0033] Figure 4 It is a three-dimensional structural schematic diagram of the structural deformation detection system of the present invention;

[0034] Figure 5 A schematic diagram of the relationship between the mutual inductance coupling gap size and the microwave transceiver antenna of the present invention;

[0035] Figure 6 It is a schematic diagram of the linear relationship between the resonant frequency and the mutual inductance coupling gap size of the present invention;

[0036] Figure 7 This is a schematic diagram of the electric field distribution when the mutual inductance coupling gap is 0 mm in the present invention;

[0037] Figure 8 This is a schematic diagram of the electric field distribution when the mutual inductance coupling gap is 3 mm in the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. First fixing seat, 2. First opening, 3. First dielectric substrate, 4. First microstrip circuit, 5. Second fixing seat, 6. Second dielectric substrate, 7. Second microstrip circuit, 8. First inner cavity, 9. Second inner cavity, 10. Second opening, 11. First rectangular groove, 12. First metal strip, 13. Microwave substrate, 14. Metal patch, 15. Launch groove, 16. Antenna feed line. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] Example

[0042] like Figure 1-Figure 3 As shown, this embodiment provides a structural deformation detection sensor, including: a first fixing seat 1 and a second fixing seat 5.

[0043] The first fixing seat 1 is rectangular, and a first dielectric substrate 3 is arranged on the first fixing seat 1, and a first microstrip circuit 4 is arranged at one end of the first dielectric substrate 3. The second fixing seat 5 is also rectangular, and the first fixing seat 1 and the second fixing seat 5 have the same size. The first fixing seat 1 and the second fixing seat 5 are made of plastic material, and the second fixing seat 5 is arranged parallel to the first fixing seat 1. A second dielectric substrate 6 is arranged on the second fixing seat 5, and a second microstrip circuit 7 is arranged at one end of the second dielectric substrate 6. The second microstrip circuit 7 faces the first microstrip circuit 4, wherein the first dielectric substrate 3 and the second dielectric substrate 6 are arranged relatively parallel, and a mutual inductance coupling gap is left between the first microstrip circuit 4 and the second microstrip circuit 7. So that a mutual inductance electric field is formed between the first microstrip circuit 4 and the second microstrip circuit 7. When the structure is not deformed, the first microstrip circuit 4 and the second microstrip circuit 7 are completely arranged opposite to each other. When the structure is deformed, the first microstrip circuit 4 and the second microstrip circuit 7 will be staggered. The generated electric field will fluctuate. The dielectric constants of the first dielectric substrate 3 and the second dielectric substrate 6 are 3-5.

[0044] Specifically, in this embodiment, a first inner cavity 8 is provided in the first fixing seat 1, a first opening 2 is provided on one side of the first fixing seat 1, the first opening 2 is communicated with the first inner cavity 8, a first dielectric substrate 3 is provided in the first inner cavity 8, one end of the first dielectric substrate 3 provided with a first microstrip circuit 4 extends out of the first fixing seat 1 from the first opening 2, and the first dielectric substrate 3 can be protected by the first fixing seat 1 to prevent damage to the first dielectric substrate 3. When in use, the first fixing seat 1 is directly glued to the corresponding position by adhesive.

[0045] Specifically, in this embodiment, a second inner cavity 9 is provided in the second fixing seat 5, a second opening 10 is provided on one side of the second fixing seat 5, the second opening 10 is communicated with the second inner cavity 9, a second dielectric substrate 6 is provided in the second inner cavity 9, and one end of the second dielectric substrate 6 provided with the second microstrip circuit 7 extends out of the second fixing seat 5 from the second opening 10. The second fixing seat 5 can protect the second dielectric substrate 6 and prevent damage to the second dielectric substrate 6. When in use, the second fixing seat 5 is directly glued to the corresponding position by adhesive.

[0046] Specifically, in this embodiment, the first microstrip circuit 4 includes a plurality of first rectangular grooves 11, and the plurality of first rectangular grooves 11 are arranged in an array, wherein the first rectangular grooves 11 are long strips, wherein the depth of the first rectangular grooves 11 is 10-25 mm, and the plurality of first rectangular grooves 11 are arranged periodically, wherein the spacing between each first rectangular groove 11 is 0.5-3.5 mm, and the notch width of the first rectangular groove 11 is 0.5-3 mm. Two first metal strips 12 arranged opposite to each other are provided in each first rectangular groove 11, and the two first metal strips 12 are bent and arranged in the corresponding first rectangular groove 11, wherein the two first metal strips 12 are bent into a rectangle to form an artificial plasmon structure, and the two first metal strips 12 are fixedly connected to the inner wall of the corresponding first rectangular groove 11. The thickness of the first metal strip 12 is 0.1-0.25 mm, and the length is 1-20 mm.

[0047] Specifically, in this embodiment, the second microstrip circuit 7 includes a plurality of second rectangular grooves, and the plurality of second rectangular grooves are arranged in an array, wherein the second rectangular grooves are long strips, wherein the depth of the second rectangular grooves is 10-25 mm, and the plurality of second rectangular grooves are arranged periodically, wherein the spacing between each second rectangular groove is 0.5-3.5 mm, and the notch width of the second rectangular groove is 0.5-3 mm. Two second metal strips are arranged opposite to each other in each second rectangular groove, and the two second metal strips are bent and arranged in the corresponding second rectangular groove, and the two second metal strips are fixedly connected to the inner wall of the corresponding second rectangular groove. The two second metal strips are bent into rectangles. The thickness of the second metal strips is 0.1-0.25 mm, and the length is 1-20 mm.

[0048] Specifically, in this embodiment, the value of the mutual inductance coupling gap is 0-10 mm, and can be adjusted according to the size of the structure to be detected, so as to accurately detect slight deformations.

[0049] like Figure 4As shown, in addition, this embodiment also provides a structural deformation detection system, including the above-mentioned structural deformation detection sensor, a microwave transceiver antenna and a carrier, the microwave transceiver antenna is connected to the carrier, and the transmitting end of the microwave transceiver antenna is facing the mutual inductance coupling gap between the first microstrip circuit 4 and the second microstrip circuit 7. Microwaves are transmitted by the microwave transceiver antenna. Since the transmitting end of the microwave transceiver antenna is facing the mutual inductance coupling gap, an electric field is formed between the first microstrip circuit 4 and the second microstrip circuit 7 to completely receive the microwaves transmitted by the microwave transceiver antenna, and all of them are reflected to form a reflected wave. The reflected wave is detected and received by the microwave transceiver antenna to determine whether structural deformation has occurred. In actual detection, the microwave transceiver antenna is driven by the carrier to move toward the mutual inductance coupling gap, so that the microwaves transmitted by the microwave transceiver antenna are more stable, thereby improving the stability and accuracy of the detection. Of course, the microwave transceiver antenna can also be manually held close to the mutual inductance coupling gap.

[0050] Specifically, the microwave transceiver antenna in this embodiment includes a microwave substrate 13, a metal patch 14 and an antenna feed line 16, one side of the metal patch 14 is attached to a side surface of the microwave substrate 13, the antenna feed line 16 is fixedly connected to the microwave substrate 13, and the excitation signal is sent through the antenna feed line 16. The metal patch 14 is provided with an emission groove, and the emission groove 15 is in a long strip shape. The emission groove 15 is directly facing the mutual inductance coupling gap between the first microstrip circuit 4 and the second microstrip circuit 7. The antenna feed line 16 and the emission groove 15 are arranged in an interlaced manner. The length of the microwave substrate 13 is 10-30mm, the width is 10-25mm, and the thickness is 0.05-1mm. The length and width of the metal patch 14 are the same as those of the microwave substrate 13, and the thickness is 0.018mm. The width of the emission groove 15 is 0.25-3mm, the length is 5-25mm, and the depth is 0.008mm. The length of the antenna feed line 16 is 6-8 mm and the width is 1.3 mm, thereby ensuring that the input impedance of the microwave transceiver antenna is 50 ohms.

[0051] Specifically, in this embodiment, the vehicle is a remote-controlled car or a drone. When the drone carries a microwave transceiver antenna, the micro-structural deformation of a high-altitude wall or window can be detected. The drone drives the microwave transceiver antenna to fly toward the detection sensor. When the drone drives the microwave transceiver antenna to fly over the wall or window, it can quickly detect whether there is micro-structural deformation at the location.

[0052] In addition, this embodiment also provides a detection method using the above-mentioned structural deformation detection system, comprising the following steps:

[0053] S1. Install the first fixing seat and the second fixing seat on both sides of the detection position respectively, wherein the first fixing seat can be installed at the deformation position, and the second fixing seat can be installed at the non-deformation position. Of course, the first fixing seat and the second fixing seat can also be swapped, and the first microstrip circuit 4 and the second microstrip circuit 7 are arranged relative to each other, and a mutual inductance coupling gap is left between the first microstrip circuit 4 and the second microstrip circuit 7. Thus, a mutual inductance electric field is formed between the first microstrip circuit 4 and the second microstrip circuit 7. If deformation occurs, the position of the first fixing seat will move, so that the gap between the first microstrip circuit 4 and the second microstrip circuit 7 changes, thereby changing the mutual inductance electric field.

[0054] S2. The microwave transceiver antenna is moved to the front of the mutual inductance coupling gap by the carrier, and the microwave transceiver antenna is started to transmit microwaves, wherein the transmitting end of the microwave transceiver antenna is directly opposite to the mutual inductance coupling gap, so that the electric field between the mutual inductance coupling gaps receives the strongest microwaves, and the mutual inductance coupling gap generates a reflected wave after receiving the microwaves. Since the microwaves emitted by the microwave transceiver antenna are in a constant state, and the electric field between the mutual inductance coupling gaps is also in a stable state without changing, when the mutual inductance coupling gap changes, the electric field is driven to change, and the reflected wave reflected by the electric field will also change.

[0055] S3. For the reflected wave detection in step S2, a reflection curve is drawn to obtain the resonant frequency. By drawing the reflected wave curve by a computer, it is possible to clearly and intuitively see the situation when the reflected wave is stable, so that the frequency of the reflected wave resonance can be obtained. When the transmitted wave changes, the reflected wave curve changes at the same time, so the frequency of the reflected wave resonance changes. When the resonant frequency drifts, it indicates that structural deformation occurs, otherwise no structural deformation occurs.

[0056] The following is a specific measurement using the above embodiment.

[0057] According to the above embodiment, a sensor sample with a mutual inductive coupling gap and a microwave transceiver antenna sample S are prepared. 11 , together constitute the detection system, and its geometric parameters are shown in Table 1.

[0058] Table 1 Parameters of each part of the detection system

[0059]

[0060] The dielectric constants of the first dielectric substrate 3, the second dielectric substrate 6 and the microwave substrate 13 are all 2.65.

[0061] By running the detection system, adjusting the width of the mutual inductance coupling gap, and drawing a curve of the reflected wave received by the microwave transceiver antenna, the resonant frequency of the microwave transceiver antenna sample is obtained. Figure 5As shown in the figure, the curve is the microwave transceiver antenna sample S in the detection system 11 The parameter curve of Figure 5 g represents the size of the mutual inductance coupling gap. It can be seen that the microwave transceiver antenna sample S 11 It has a good characteristic that the resonant frequency drifts with the change of the mutual inductance coupling gap, and it shifts continuously with the change of the mutual inductance coupling gap. Figure 5 The mid-resonance frequency follows the change of the mutual inductance coupling gap and is plotted as Figure 6 , such as Figure 6 As shown, from Figure 6 It can be seen intuitively that the resonant frequency follows the change of the mutual inductance coupling gap in a positive linear relationship. Figure 6 It can be seen that within the deformation range of 3mm, the resonant frequency shows very good linear characteristics with the change of the coupling gap, and the linearity is greater than 99% after fitting. Therefore, it can be calculated that when the sensor produces a structural deformation of 1mm, the resonant frequency drift is 88.3MHz, which has very good detection sensitivity. In addition, through the linear relationship, the specific degree of structural deformation or looseness can be accurately inferred from its frequency drift.

[0062] By testing the electric field of the prepared sensor sample, the electric field distribution near the mutual inductance coupling gap of the sensor sample is obtained, as shown in the following figure: Figure 7-Figure 8 . Figure 7 It shows the surface current field distribution when the mutual inductance coupling gap is 0mm and works at 7.5GHz. Figure 8 It shows the surface current field distribution when the mutual inductance coupling gap is 3mm and it works at 7.5GHz. Figure 7 and Figure 8 It can be clearly seen that when the sensor is near the operating frequency, the current energy is mainly concentrated around the artificial plasmon structure composed of the first metal strip 12 and the second metal strip, so it has the greatest detection sensitivity here, and this can also greatly enhance the sensor's ability to resist external electromagnetic interference.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structural deformation detection sensor, characterized in that: include: A first fixing seat (1), wherein a first dielectric substrate (3) is provided on the first fixing seat (1), and a first microstrip circuit (4) is provided at one end of the first dielectric substrate (3); a second fixing seat (5), the second fixing seat (5) being arranged in parallel with the first fixing seat (1), a second dielectric substrate (6) being arranged on the second fixing seat (5), a second microstrip circuit (7) being arranged at one end of the second dielectric substrate (6), the second microstrip circuit (7) facing the first microstrip circuit (4), and a mutual inductance coupling gap being left between the first microstrip circuit (4) and the second microstrip circuit (7); A first inner cavity (8) is provided in the first fixing seat (1), a first opening (2) is provided on one side of the first fixing seat (1), the first opening (2) is communicated with the first inner cavity (8), the first dielectric substrate (3) is provided in the first inner cavity (8), one end of the first dielectric substrate (3) provided with the first microstrip circuit (4) extends out of the first fixing seat (1) through the first opening (2); The first microstrip circuit (4) comprises a plurality of first rectangular grooves (11), the plurality of first rectangular grooves (11) being arranged in an array, each of the first rectangular grooves (11) being provided with two first metal strips (12) arranged opposite to each other, the two first metal strips (12) being bent and arranged in the corresponding first rectangular groove (11), and the two first metal strips (12) being fixedly connected to the inner wall of the corresponding first rectangular groove (11).

2. The structural deformation detection sensor according to claim 1, characterized in that: A second inner cavity (9) is provided in the second fixing seat (5), a second opening (10) is provided on one side of the second fixing seat (5), the second opening (10) is communicated with the second inner cavity (9), the second dielectric substrate (6) is provided in the second inner cavity (9), one end of the second dielectric substrate (6) provided with the second microstrip circuit (7) extends out of the second fixing seat (5) from the second opening (10).

3. The structural deformation detection sensor according to claim 1, characterized in that: The second microstrip circuit (7) comprises a plurality of second rectangular grooves, the plurality of second rectangular grooves are arranged in an array, each of the second rectangular grooves is provided with two second metal strips arranged opposite to each other, the two second metal strips are bent and arranged in the corresponding second rectangular groove, and the two second metal strips are fixedly connected to the inner wall of the corresponding second rectangular groove.

4. The structural deformation detection sensor according to any one of claims 1 to 3, characterized in that: The mutual inductance coupling gap has a value of 0-10 mm.

5. A structural deformation detection system, characterized in that: It comprises the structural deformation detection sensor according to any one of claims 1 to 4, a microwave transceiver antenna and a carrier, wherein the microwave transceiver antenna is connected to the carrier, and the transmitting end of the microwave transceiver antenna is oriented toward the mutual inductance coupling gap between the first microstrip circuit (4) and the second microstrip circuit (7).

6. The structural deformation detection system according to claim 5, characterized in that: The microwave transceiver antenna comprises a microwave substrate (13), a metal patch (14) and an antenna feed line (16); one side of the metal patch (14) is attached to a side surface of the microwave substrate (13); the antenna feed line (16) is fixedly connected to the microwave substrate (13); an emission groove (15) is provided on the metal patch (14); the emission groove (15) is in the shape of a long strip; and the emission groove (15) faces the mutual inductance coupling gap between the first microstrip circuit (4) and the second microstrip circuit (7).

7. The structural deformation detection system according to claim 5, characterized in that: The vehicle is a remote-controlled car or a drone.

8. A detection method using the structural deformation detection system according to any one of claims 5 to 7, characterized in that: The following steps are involved: S1. The first fixing seat and the second fixing seat are respectively installed on both sides of the detection position, and the first microstrip circuit (4) and the second microstrip circuit (7) are arranged opposite to each other, and a mutual inductance coupling gap is left between the first microstrip circuit (4) and the second microstrip circuit (7); S2, driving the microwave transceiver antenna to move to the front of the mutual inductance coupling slot by the carrier, starting the microwave transceiver antenna to transmit microwaves, and the mutual inductance coupling slot generates reflected waves after receiving the microwaves; S3. Detect the reflected wave in step S2, draw a reflection curve to obtain the resonance frequency point, and when the resonance frequency point drifts, it indicates that structural deformation occurs.

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