Method and system for detecting repairing quality of concrete crack inserted into fabricated building

Abstract

The invention relates to the field of crack repairing quality detection, in particular to a method and system for detecting concrete crack repairing quality of an inserted fabricated building. Signals generated by a plurality of energy generation points are received by a sensor from various angles, whether cavities and / or cracks exist in repaired cracks or not is comprehensively detected from various angles so as to continuously judge whether the filling amount of repairing materials in the repairing process is sufficient or not, and the filling amount of the repairing materials in the repairing process is sufficient or not by conducting wavelet decomposition on the signals received by the sensor. According to the method, signals of different frequency ranges can be obtained, signals of frequencies with obvious changes can be obtained according to different attenuation effects of the signals of different frequencies after passing through concrete, and thus the repairing condition of concrete cracks can be analyzed more obviously; the problem that in the process of repairing the cracks in the concrete component through concrete at present, the repairing condition of the cracks in the concrete component is difficult to accurately judge due to the fact that the situation of the cracks in the concrete is difficult to observe through visual inspection is solved.

Description

Technical Field

[0001] The present invention relates to the field of crack repair quality detection, and in particular to a method and system for detecting the quality of concrete crack repair inserted into an assembled building. Background Art

[0002] At present, prefabricated buildings have become a more common form of construction, that is, various parts of the building are prefabricated and then assembled. This method allows the various components of the building to be produced independently, so that the various components can be assembled quickly during construction. Compared with traditional buildings, which need to wait for the lower layer of concrete to cool before construction, the construction period of prefabricated buildings is shorter.

[0003] However, prefabricated buildings require a large number of repeated parts during construction, so it is difficult to guarantee 100% compliance during the production process. As a result, a small number of cracks may occur. Some cracks can be repaired within the safe range to reduce cost losses. However, at present, in the process of repairing cracks in concrete components through concrete, it is difficult to visually observe the cracks inside the concrete, making it difficult to accurately judge the repair status of cracks in concrete components, thus posing a safety hazard. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method and system for detecting the quality of concrete crack repair inserted into an assembled building, which solves the problem that in the current process of repairing cracks in concrete components through concrete, it is difficult to accurately judge the repair condition of cracks in concrete components due to the difficulty in visually observing the crack condition inside the concrete.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for testing the quality of concrete crack repair inserted into an assembled building, the method comprising the following steps:

[0007] S1, placing the sensor along with the repair material into the crack, and projecting the position of the sensor on the wall surface to obtain a first position point;

[0008] S2, setting a number of energy generating points on the wall with equal distances from the first position point as the center of the circle;

[0009] S3, sequentially setting signal sources at energy generation points to generate first energy, and decomposing the signal received by the sensor to obtain second energy;

[0010] S4, calculating the ratio of each second energy to the first energy at each energy generation point in turn to obtain the repair rate of the concrete cracks, and classifying them into a plurality of frequency groups according to the corresponding frequency ranges;

[0011] S5, continuously putting the repair material into the crack, and successively determining whether the change amount of the repair rate in each frequency group is less than the repair rate change threshold;

[0012] If yes, the repair rate is marked as the benchmark repair rate, and then the process goes to step S6;

[0013] If not, output a prompt message indicating that the crack repair is unqualified;

[0014] S6. Periodically collect the repair rate of each energy generation point within a certain period to obtain a comparative repair rate, and determine whether the difference between the comparative repair rate and the benchmark repair rate is less than or equal to the repair rate attenuation threshold;

[0015] If yes, then output a prompt message indicating that the repair quality is qualified;

[0016] If not, a prompt message indicating that the repair quality is unqualified is output.

[0017] Preferably, in step S2, the following steps are specifically included:

[0018] S21, setting the standard distance between the sensor and the energy generation point;

[0019] S22, measuring a first distance between the sensor and a first position point;

[0020] S23. Calculate the radius of a standard circle with the first position point as the center according to the first distance and the standard distance; the calculation formula of the radius of the standard circle is:

[0021]

[0022] In the above formula, R represents the radius of the standard circle, L0 is the standard distance, and L1 is the first distance;

[0023] S24. Evenly set a number of energy generating points on the standard circle.

[0024] Preferably, in step S3, the following steps are specifically included:

[0025] S31, sequentially setting signal sources at energy generation points to generate first energy;

[0026] S32, performing several layers of wavelet decomposition on the first energy signal received by the sensor to obtain several second energies.

[0027] Preferably, in step S4, the following steps are specifically included:

[0028] S41, calculating the ratio of the second energy to the first energy at each energy generation point in sequence to obtain a repair rate of the concrete crack;

[0029]

[0030] In the above formula, S represents the repair rate, A(1) represents the first energy, and A(2) represents the second energy;

[0031] S42. Classify the repair rates of concrete cracks into a number of frequency groups according to corresponding frequency ranges.

[0032] Preferably, in step S5, the following steps are specifically included:

[0033] S51, obtaining the repair rate of each frequency group at any time;

[0034] S52, calculating the maximum and minimum repair rate extreme values ​​in each frequency group;

[0035] S53, calculating the extreme value threshold of the repair rate according to the average value of the repair rate in the frequency group; the calculation formula of the extreme value threshold of the repair rate is:

[0036]

[0037] In the above formula, ΔS 0 is the extreme value threshold of the repair rate, γ0 is the extreme value threshold coefficient, S y is the yth repair rate in the frequency group;

[0038] S54, determining whether the repair rate extreme value corresponding to the frequency group is less than or equal to the repair rate extreme value threshold;

[0039] If yes, proceed to step S55;

[0040] If not, output a prompt message indicating that the crack repair is unqualified;

[0041] S55, calculating the repair rate change threshold according to the repair rate extreme value threshold;

[0042] S56. After the repair material is placed in the crack this time, the corresponding repair rate in the frequency group and the repair rate change after the repair material was placed in the crack last time are calculated; the calculation formula for the repair rate change is:

[0043] ΔS(T)=S α (T)-S α (T-1)

[0044] In the above formula, ΔS(T) is the change in the repair rate after the repair material is placed in the crack, S α (T) is the αth repair rate in the frequency group after the repair material is placed in the crack, S α (T-1) is the αth repair rate in the frequency group after the repair material was last placed in the crack;

[0045] S57, determining whether the repair rate changes in the frequency group are all less than the repair rate change threshold;

[0046] If yes, proceed to step S6;

[0047] If not, a prompt message indicating that the crack repair is unqualified is output.

[0048] Preferably, in step S6, the following steps are specifically included:

[0049] S61. Calculate the repair rate attenuation threshold according to the repair rate extreme value threshold; the calculation formula of the repair rate attenuation threshold is:

[0050] ΔS 2 =γ2ΔS 0

[0051] In the above formula, ΔS 2 is the repair rate attenuation threshold, γ2 is the attenuation coefficient, ΔS 0 is the extreme value threshold of the repair rate;

[0052] S62, periodically collecting the repair rate of each energy generation point within a certain period to obtain a comparative repair rate;

[0053] S63, calculating the difference between the comparison repair rate and the reference repair rate to obtain the attenuation repair rate; the calculation formula of the attenuation repair rate is:

[0054] ΔS(T)′=S α (T)′-S α (T0)′

[0055] In the above formula, ΔS(T)' represents the attenuation repair rate, S α (T)' represents the comparison repair rate at time T, S α (T0)' represents the baseline repair rate;

[0056] S64, determining whether the attenuated repair rate is less than or equal to the repair rate attenuation threshold;

[0057] If yes, then output a prompt message indicating that the repair quality is qualified;

[0058] If not, a prompt message indicating that the repair quality is unqualified is output.

[0059] Preferably, in step S32, the expression of the second energy is:

[0060]

[0061] In the above formula, A(1) is the first energy, j is the scale coefficient, k is the translation coefficient, i is the frequency coefficient, A(2) is the second energy, and t is the displacement coefficient, which represents time.

[0062] Preferably, in step S52, the calculation formula of the repair rate extreme value is:

[0063] ΔS(max)=MAX|S α -S β |

[0064] In the above formula, ΔS(max) represents the maximum and minimum repair rate extremes in any frequency group, S α and S β denote the αth and βth repair rates in the frequency group, respectively.

[0065] Preferably, in step S55, the calculation formula of the repair rate change threshold is:

[0066] ΔS 1 =γ1ΔS 0

[0067] In the above formula, ΔS 1 represents the repair rate change threshold, γ1 is the change threshold coefficient, ΔS 0 is the repair rate extreme threshold.

[0068] The technical solution also provides a detection system for implementing any one of the detection methods described above, the system comprising: a processor and a memory, the memory being used to store a computer program, and the computer program implementing any one of the detection methods described above when executed by the processor.

[0069] Compared with the prior art, the present invention provides a method and system for detecting the quality of concrete crack repair inserted into a prefabricated building, which has the following beneficial effects:

[0070] 1. The present invention sets a number of energy generating points, and the signals generated by the energy generating points are received by sensors from various angles, so that it can comprehensively detect from various angles whether there are cavities and / or cracks in the repaired cracks, so as to continuously judge whether the filling amount of the repair material in the repair process is sufficient.

[0071] 2. The present invention performs wavelet decomposition on the signal received by the sensor, so as to obtain signals in different frequency ranges. According to the different attenuation effects of signals of different frequencies after passing through concrete, signals with more obvious frequency changes can be obtained, so as to more clearly analyze the repair condition of concrete cracks.

[0072] 3. The present invention can judge the repair status of concrete cracks by comparing the repair rate with the benchmark repair rate as time passes after the cracks are filled and before the concrete is completely solidified, thereby reducing the probability of unqualified repair quality of concrete parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0074] Figure 1 It is a flow chart of the method for detecting the quality of concrete crack repair of the present invention;

[0075] Figure 2 It is a schematic diagram of the energy generation point distribution of the present invention;

[0076] Figure 3 It is a schematic diagram of the calculation of the radius of the standard circle of the present invention. DETAILED DESCRIPTION

[0077] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0078] Those skilled in the art can understand that all or part of the steps in the following embodiments can be completed by instructing the relevant hardware through a program, so the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can be in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0079] In order to solve the problem that it is difficult to accurately judge the repair condition of cracks in concrete parts by visually observing the crack condition inside concrete during the current process of repairing cracks in concrete parts by concrete, the present invention provides a method for detecting the repair quality of concrete cracks inserted into prefabricated buildings, which continuously determines whether the repair quality is abnormal during the repair process and for a period of time after the repair. The detection method comprises the following steps:

[0080] S1. Place the sensor into the crack along with the repair material, and project the position of the sensor onto the wall surface to obtain a first position point; the sensor currently used is a ceramic piezoelectric sensor, and the repair material is generally concrete;

[0081] S2, with the first position point as the center, a number of energy generating points are set on the wall surface with equal distances therefrom; since the same component is mass-produced in prefabricated buildings, in order to ensure that the attenuation amplitude of the signal after passing through the same distance of concrete layer is the same, so as to ensure that the signal received by the sensor is closer, and to facilitate the subsequent setting of various thresholds, and to facilitate batch measurement of concrete components with cracks, in step S2, the following steps are specifically included:

[0082] S21, setting the standard distance between the sensor and the energy generation point;

[0083] S22, measuring a first distance between the sensor and the first position point; the first distance may be measured by ultrasonic measurement;

[0084] S23, calculating the radius of a standard circle with the first position point as the center according to the first distance and the standard distance;

[0085] The calculation formula for the radius of a standard circle is:

[0086]

[0087] In the above formula, R represents the radius of the standard circle, L0 is the standard distance, and L1 is the first distance;

[0088] S24. Evenly set a number of energy generating points on the standard circle.

[0089] S3, signal sources are sequentially arranged at energy generation points to generate the first energy, and the signal received by the sensor is decomposed to obtain the second energy; the signal source may be a function generator, and the signal generated by the signal source has different frequencies, and the signal changes after passing through the concrete are different, so the signal received by the sensor is decomposed to obtain the second energy, and the second energy contains signals of different frequencies, so that the signals of different frequencies are analyzed respectively. In step S3, the following steps are specifically included:

[0090] S31, sequentially setting signal sources at energy generation points to generate first energy;

[0091] S32, performing a plurality of layers of wavelet decomposition on the first energy signal received by the sensor to obtain a plurality of second energies; the expression of the second energy is:

[0092]

[0093] In the above formula, A(1) is the first energy, j is the scale coefficient, k is the translation coefficient, i is the frequency coefficient, A(2) is the second energy, and t is the displacement coefficient, which represents time.

[0094] S4, calculate the ratio of each second energy to the first energy at each energy generation point in turn to obtain the repair rate of the concrete cracks, and classify them into several frequency groups according to the corresponding frequency range; the closer the ratio of the second energy to the first energy is to 1, the higher the repair rate is, and the better the crack repair effect is. In addition, since the attenuation amplitude of signals in different frequency ranges is different after passing through the concrete layer, they are classified into several frequency groups. Classification and analysis are performed in units of frequency groups, so that the repair quality of the cracks can be analyzed more clearly. In step S4, the following steps are specifically included:

[0095] S41, calculating the ratio of the second energy to the first energy at each energy generation point in sequence to obtain a repair rate of the concrete crack;

[0096]

[0097] In the above formula, S represents the repair rate, A(1) represents the first energy, and A(2) represents the second energy;

[0098] S42. Classify the repair rates of concrete cracks into a number of frequency groups according to corresponding frequency ranges.

[0099] S5, continuously putting the repair material into the crack, and successively determining whether the change amount of the repair rate in each frequency group is less than the repair rate change threshold;

[0100] If yes, the repair rate is marked as the benchmark repair rate, and then the process goes to step S6;

[0101] If not, output a prompt message indicating that the crack repair is unqualified;

[0102] In the process of repairing cracks, since the volume of the cracks is difficult to accurately determine, the amount of repair material added is difficult to accurately determine. Therefore, whether the amount of repair material is sufficient is judged by the repair rate. At the same time, since there are cavities in the cracks that are not filled with concrete and / or the crack positions are uncertain, a number of energy generation points are used to achieve the purpose of comprehensively detecting whether there are cavities at various positions in the repaired concrete cracks, so as to achieve a more comprehensive detection of concrete cracks. In step S5, the following steps are specifically included:

[0103] S51, obtaining the repair rate of each frequency group at any time;

[0104] S52, calculating the repair rate extreme value of the maximum and minimum repair rate in each frequency group; the calculation formula of the repair rate extreme value is:

[0105] ΔS(max)=MAX|S α -S β |

[0106] In the above formula, ΔS(max) represents the maximum and minimum repair rate extremes in any frequency group, S α and S β denote the αth and βth repair rates in the frequency group, respectively;

[0107] S53, calculating the extreme value threshold of the repair rate according to the average value of the repair rate in the frequency group; the calculation formula of the extreme value threshold of the repair rate is:

[0108]

[0109] In the above formula, ΔS 0 is the extreme value threshold of the repair rate, γ0 is the extreme value threshold coefficient, S y is the yth repair rate in the frequency group;

[0110] S54, determining whether the repair rate extreme value corresponding to the frequency group is less than or equal to the repair rate extreme value threshold;

[0111] If yes, proceed to step S55;

[0112] If not, output a prompt message indicating that the crack repair is unqualified;

[0113] S55. Calculate the repair rate change threshold according to the repair rate extreme value threshold; the calculation formula of the repair rate change threshold is:

[0114] ΔS 1 =γ1ΔS 0

[0115] In the above formula, ΔS 1 represents the repair rate change threshold, γ1 is the change threshold coefficient, ΔS 0 is the extreme value threshold of the repair rate;

[0116] S56. After the repair material is placed in the crack this time, the corresponding repair rate in the frequency group and the repair rate change after the repair material was placed in the crack last time are calculated; the calculation formula for the repair rate change is:

[0117] ΔS(T)=S α (T)-S α (T-1)

[0118] In the above formula, ΔS(T) is the change in the repair rate after the repair material is placed in the crack, S α (T) is the αth repair rate in the frequency group after the repair material is placed in the crack, S α (T-1) is the αth repair rate in the frequency group after the repair material was last placed in the crack;

[0119] S57, determining whether the repair rate changes in the frequency group are all less than the repair rate change threshold;

[0120] If yes, proceed to step S6;

[0121] If not, a prompt message indicating that the crack repair is unqualified is output.

[0122] S6. Periodically collect the repair rate of each energy generation point within a certain period to obtain a comparative repair rate, and determine whether the difference between the comparative repair rate and the benchmark repair rate is less than or equal to the repair rate attenuation threshold;

[0123] If yes, then output a prompt message indicating that the repair quality is qualified;

[0124] If not, a prompt message indicating that the repair quality is unqualified is output;

[0125] Since there may be fine cracks in the cracks, after initially determining that the amount of repair material is sufficient, over time, part of the concrete in the main crack will gradually penetrate into the fine cracks, thereby forming voids and causing the repair quality to be unqualified. Therefore, before the concrete is completely solidified, it is also necessary to further determine whether the repair quality is qualified by the change of the repair rate over time. In step S6, the following steps are specifically included:

[0126] S61. Calculate the repair rate attenuation threshold according to the repair rate extreme value threshold; the calculation formula of the repair rate attenuation threshold is:

[0127] ΔS 2 =γ2ΔS 0

[0128] In the above formula, ΔS 2 is the repair rate attenuation threshold, γ2 is the attenuation coefficient, ΔS 0 is the extreme value threshold of the repair rate;

[0129] S62, periodically collecting the repair rate of each energy generation point within a certain period to obtain a comparative repair rate;

[0130] S63, calculating the difference between the comparison repair rate and the reference repair rate to obtain the attenuation repair rate; the calculation formula of the attenuation repair rate is:

[0131] ΔS(T)′=S α (T)′-S α (T0)′

[0132] In the above formula, ΔS(T)' represents the attenuation repair rate, S α (T)' represents the comparison repair rate at time T, S α (T0)' represents the baseline repair rate;

[0133] S64, determining whether the attenuated repair rate is less than or equal to the repair rate attenuation threshold;

[0134] If yes, then output a prompt message indicating that the repair quality is qualified;

[0135] If not, a prompt message indicating that the repair quality is unqualified is output.

[0136] The technical solution also provides a detection system for a method for detecting the quality of concrete crack repair inserted into an assembled building. The system includes: a processor and a memory, the memory is used to store a computer program, and when the computer program is executed by the processor, the method for detecting the quality of concrete crack repair is implemented.

[0137] The above implementation methods have been described in detail. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for testing the quality of concrete crack repair inserted into an assembled building, characterized in that: The detection method comprises the following steps: S1, placing the sensor along with the repair material into the crack, and projecting the position of the sensor on the wall surface to obtain a first position point; S2, setting a number of energy generating points on the wall with equal distances from the first position point as the center of the circle; S3, sequentially setting signal sources at energy generation points to generate first energy, and decomposing the signal received by the sensor to obtain second energy; S4, calculating the ratio of each second energy to the first energy at each energy generation point in turn to obtain the repair rate of the concrete cracks, and classifying them into a plurality of frequency groups according to the corresponding frequency ranges; S5, continuously putting the repair material into the crack, and successively determining whether the change amount of the repair rate in each frequency group is less than the repair rate change threshold; If yes, the repair rate is marked as the benchmark repair rate, and then the process goes to step S6; If not, output a prompt message indicating that the crack repair is unqualified; S6. Periodically collect the repair rate of each energy generation point within a certain period to obtain a comparative repair rate, and determine whether the difference between the comparative repair rate and the benchmark repair rate is less than or equal to the repair rate attenuation threshold; If yes, then output a prompt message indicating that the repair quality is qualified; If not, a prompt message indicating that the repair quality is unqualified is output.

2. The detection method according to claim 1, characterized in that: In step S2, the following steps are specifically included: S21, setting the standard distance between the sensor and the energy generation point; S22, measuring a first distance between the sensor and a first position point; S23. Calculate the radius of a standard circle with the first position point as the center according to the first distance and the standard distance; the calculation formula of the radius of the standard circle is: In the above formula, R represents the radius of the standard circle, L0 is the standard distance, and L1 is the first distance; S24. Evenly set a number of energy generating points on the standard circle.

3. The detection method according to claim 1, characterized in that: In step S3, the following steps are specifically included: S31, sequentially setting signal sources at energy generation points to generate first energy; S32, performing several layers of wavelet decomposition on the first energy signal received by the sensor to obtain several second energies.

4. The detection method according to claim 1, characterized in that: In step S4, the following steps are specifically included: S41, calculating the ratio of the second energy to the first energy at each energy generation point in sequence to obtain a repair rate of the concrete crack; In the above formula, S represents the repair rate, A(1) represents the first energy, and A(2) represents the second energy; S42. Classify the repair rates of concrete cracks into a number of frequency groups according to corresponding frequency ranges.

5. The detection method according to claim 1, characterized in that: In step S5, the following steps are specifically included: S51, obtaining the repair rate of each frequency group at any time; S52, calculating the maximum and minimum repair rate extreme values ​​in each frequency group; S53, calculating the extreme value threshold of the repair rate according to the average value of the repair rate in the frequency group; the calculation formula of the extreme value threshold of the repair rate is: In the above formula, ΔS 0 is the extreme value threshold of the repair rate, γ0 is the extreme value threshold coefficient, S y is the yth repair rate in the frequency group; S54, determining whether the repair rate extreme value corresponding to the frequency group is less than or equal to the repair rate extreme value threshold; If yes, proceed to step S55; If not, output a prompt message indicating that the crack repair is unqualified; S55, calculating the repair rate change threshold according to the repair rate extreme value threshold; S56. After the repair material is placed in the crack this time, the corresponding repair rate in the frequency group and the repair rate change after the repair material was placed in the crack last time are calculated; the calculation formula for the repair rate change is: ΔS(T)=S α (T)-S α (T-1) In the above formula, ΔS(T) is the change in the repair rate after the repair material is placed in the crack, S α (T) is the αth repair rate in the frequency group after the repair material is placed in the crack, S α (T-1) is the αth repair rate in the frequency group after the repair material was last placed in the crack; S57, determining whether the repair rate changes in the frequency group are all less than the repair rate change threshold; If yes, proceed to step S6; If not, a prompt message indicating that the crack repair is unqualified is output.

6. The detection method according to claim 1, characterized in that: In step S6, the following steps are specifically included: S61. Calculate the repair rate attenuation threshold according to the repair rate extreme value threshold; the calculation formula of the repair rate attenuation threshold is: ΔS 2 =γ2ΔS 0 In the above formula, ΔS 2 is the repair rate attenuation threshold, γ2 is the attenuation coefficient, ΔS 0 is the extreme value threshold of the repair rate; S62, periodically collecting the repair rate of each energy generation point within a certain period to obtain a comparative repair rate; S63, calculating the difference between the comparison repair rate and the reference repair rate to obtain the attenuation repair rate; the calculation formula of the attenuation repair rate is: ΔS(T)’=S α )T)’-S α (T0)’ In the above formula, ΔS(T)' represents the attenuation repair rate, S α (T)' represents the comparison repair rate at time T, S α (T0)' represents the baseline repair rate; S64, determining whether the attenuated repair rate is less than or equal to the repair rate attenuation threshold; If yes, then output a prompt message indicating that the repair quality is qualified; If not, a prompt message indicating that the repair quality is unqualified is output.

7. The detection method according to claim 3, characterized in that: In step S32, the expression of the second energy is: In the above formula, A(1) is the first energy, j is the scale coefficient, k is the translation coefficient, i is the frequency coefficient, A(2) is the second energy, and t is the displacement coefficient, which represents time.

8. The detection method according to claim 5, characterized in that: In step S52, the calculation formula of the repair rate extreme value is: ΔS(max)=MAX|S α -S β | In the above formula, ΔS(max) represents the maximum and minimum repair rate extremes in any frequency group, S α and S β denote the αth and βth repair rates in the frequency group, respectively.

9. The detection method according to claim 5, characterized in that: In step S55, the calculation formula of the repair rate change threshold is: ΔS 1 =γ1ΔS 0 In the above formula, ΔS 1 represents the repair rate change threshold, γ1 is the change threshold coefficient, ΔS 0 is the repair rate extreme threshold.

10. A detection system for implementing the detection method according to any one of claims 1 to 9, characterized in that: The method comprises a processor and a memory, wherein the memory is used to store a computer program, and when the computer program is executed by the processor, the detection method according to any one of claims 1 to 9 is implemented.

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