CN117169477B - Building indoor ground hollowing degree assessment method - Google Patents
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Abstract
The invention discloses a building indoor ground hollowing degree assessment method, which relates to the technical field of hollowing degree assessment and comprises the steps of dividing an appointed building indoor ground region, primarily analyzing and calculating surface defect degree values of indoor ground subregions, comparing and extracting inspection parameters, collecting physical parameters of the indoor ground subregions, analyzing the hollowing defect values of the indoor ground subregions, screening different ground regions according to the hollowing degree of the appointed building indoor ground subregions, and carrying out feedback prompt. According to the invention, by introducing instrument testing and data analysis technology, the hollowing defect value of each indoor ground subarea can be converted into quantitative evaluation indexes, the hollowing degree of each area is determined and classified, so that the severity and the urgency of the problem can be better understood, the ground hollowing evaluation result with more scientific basis can be obtained, and the control timeliness of the ground quality of a building can be improved.
Description
Technical Field
The invention relates to the technical field of hollowing degree evaluation, in particular to a building indoor ground hollowing degree evaluation method.
Background
The hollowing of the indoor floor refers to the phenomenon that gaps or hollows exist between building floor materials and a substructure, and is usually caused by weak material adhesion, improper construction or long-term use abrasion. Ground hollowing problems negatively affect building stability, acoustic performance and user safety. Therefore, accurate assessment of the indoor ground hollowness is an important problem in construction engineering.
At present, the prior art has some limitations in the evaluation method for the indoor ground hollowness degree of a building, and specifically provides the following aspects: currently, assessment of the level of hollowness in an indoor floor is primarily dependent on manual tapping of the floor surface, visual inspection or sensory assessment. However, these methods have problems of subjectivity and subjectivity, and accuracy and repeatability of the evaluation result are limited, so that it is necessary to develop an objective and accurate evaluation method to quantitatively evaluate the indoor ground hollowness and provide reliable data support and decision basis.
Patent publication No.: CN114487110a discloses a method and a device for automatically detecting hollowness of a floor tile, the method comprises the steps of transmitting ultrasonic waves to a detection point of the floor tile to be paved, receiving echo signals from the floor tile, processing the ultrasonic signals by using a trained deep learning classification model to obtain a hollowness situation prediction result of the detection point, and imaging all recorded detection points on a display screen in a cloud pattern form corresponding to the hollowness situation to obtain a floor tile paving quality evaluation result diagram.
Patent publication No.: CN108680646A, a hollowing detection device and detection method thereof, including flexible bracing piece, detection component, mark subassembly and controller, mark subassembly includes spraying mechanism and rubber sacculus, rubber sacculus and spraying mechanism pass through automatically controlled valve intercommunication, detection component includes hollow spherical shell and driving motor, driving motor outside cover is equipped with the fixing base, driving motor's output shaft fixedly connected with eccentric block, the fixing base passes through an angle adjustment mechanism and flexible bracing piece's outer cylinder wall fixed connection, pass through an extension spring connection between fixing base and the flexible bracing piece, the controller includes sound collection module, master control chip, storage module, display screen and button module, can beat by robbing the wall fast, and judge wall quality problem through the knocking echo of analysis wall, easy operation detects the accuracy reliably simultaneously.
In summary, the current indoor ground hollowness assessment method has the problem that the data analysis is not comprehensive and specific, and meanwhile, the method may not be suitable for specific ground types, so that further research and development of a new assessment method are required to improve the objectivity and accuracy of the assessment result. By introducing instrument test and data analysis technology, the ground hollowing evaluation result with more scientific basis can be obtained, more reliable information is provided for construction engineers, and the ground quality and safety of the building are improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a building indoor ground hollowing degree evaluation method which can effectively solve the problems related to the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the method comprises the first step of dividing the indoor ground area of a specified building, and primarily analyzing and calculating the surface defect degree value of each indoor ground subarea, so as to compare and extract the inspection parameters.
And secondly, collecting physical parameters of each indoor ground subarea, and analyzing the empty defect value of each indoor ground subarea.
And thirdly, analyzing the hollowness of each indoor ground subarea according to the hollowness of each area of the indoor ground of the appointed building and carrying out feedback prompt.
Further, the specific indoor ground area of the building is divided, and the specific process is as follows: and carrying out panoramic scanning on the indoor ground areas of the appointed building, thereby dividing each indoor ground subarea and acquiring panoramic scanning images of each indoor ground subarea.
Further, the preliminary analysis calculates the surface defect degree value of each ground subarea in the room, and the specific process is as follows: according to the panoramic scanning image of each indoor ground subarea, comparing the panoramic scanning image with the standard panoramic image of each indoor ground subarea stored in the database, thereby extracting the area S of each apparent defect area of each indoor ground subarea Schizoib (mizobium) And each crack region is used for carrying out detection point layout on each indoor ground subarea, and taking the central point of each indoor ground subarea as a core reference point, thereby extracting and counting the height difference H between each detection point of each indoor ground subarea and the corresponding core reference point ij 。
Extracting defect factors corresponding to the reference height difference H' and the unit defect area stored in the database, and calculating a first defect index alpha of the surface of each indoor ground subarea i The calculation formula is as follows:wherein ε is 1 The defect factor corresponding to the unit defect area is represented by i, i=1, 2,3, … m, n, b, b=1, 2,3, … m, c, j, j=1, 2,3, … m, and m, respectively.
Counting extension length L of each crack zone of each floor subarea in appointed building 1 And maximum width KL 1 And extracts the allowable extension length L 'and the allowable maximum width KL' of each crack region stored in the database.
Counting the quantity Q of cracks of each ground subarea in a specified building i And extracting defect factors corresponding to single cracks stored in the database.
Thereby calculating the crack defect degree value LF of each ground subarea in the room i The calculation formula is as follows:where l denotes the number of each crack region, l=1, 2,3,..h, h denotes the number of crack regions, ε 2 And epsilon 3 Correction factors epsilon corresponding to the set extension length and maximum width of the crack are respectively shown 4 Representing the defect factor corresponding to a single crack.
Calculating the surface defect degree value beta of each indoor ground subarea i Which is provided withThe calculation formula is as follows:
wherein e represents a natural constant, phi 1 And phi 2 And respectively representing the set correction factors corresponding to the first defect index and the crack defect degree value of the surface.
Further, the comparison and extraction test parameters comprise the following specific processes: extracting surface defect degree values of all indoor ground subareas, and matching the surface defect degree values with detection parameters corresponding to the set surface defect degree value intervals to obtain detection parameters corresponding to all indoor ground subareas, wherein the detection parameters comprise detection vibration limit speed, detection adaptation limit frequency, detection allowable peak amplitude, detection allowable bandwidth, air leakage standard rate and standard pressure difference.
Further, the physical parameter acquisition is performed on each indoor ground subarea, and the specific process is as follows: setting a plurality of monitoring time points, counting the acceleration values of vibration signals of all indoor ground subareas measured by the accelerometer in each monitoring time point, and preprocessing the acceleration signals, so as to construct an acceleration fluctuation line graph of the vibration signals of all indoor ground subareas.
Calculating vibration velocity V of each floor sub-area in a designated building i The calculation formula is as follows:
wherein a is i (t) represents the value of the vibration signal acceleration at the time point t, t represents the number of each monitoring time point, t=1, 2.
And analyzing the indoor ground vibration signals, and thus calculating the vibration hollowness degree index of each indoor ground subarea.
Further, the method for analyzing the indoor ground vibration signal comprises the following specific processes: and counting vibration signals of each indoor ground subarea in each monitoring time point, and accordingly constructing a vibration signal fluctuation line graph of each ground subarea.
Extracting the transmitting signal time point and the receiving signal time point of the vibration signals of each indoor ground subarea, and performing difference processing to obtain the reflection time difference T of the vibration signals of each indoor ground subarea Difference i 。
Performing spectrum analysis on the vibration signals of each indoor ground subarea to obtain the resonance frequency P of each indoor ground subarea i Peak amplitude F Web i Bandwidth D Web i Extracting the allowable peak amplitude F of vibration signals of each floor sub-area in the room Web i ' checking the allowable bandwidth D Web i ′。
Extracting a hollowness degree factor kappa corresponding to a predefined unit reflection time difference, thereby calculating a first hollowness degree evaluation index KP of vibration signals of each indoor ground subarea i The calculation formula is as follows:wherein gamma is 1 And gamma 2 The set peak amplitudes and the correction factors corresponding to the bandwidths are shown.
Further, the calculating of the vibration hollowness degree index of each ground subarea in the room comprises the following specific processes: extracting vibration velocity V of each floor sub-area in a designated building i And the resonance frequency P of each floor sub-area in the room i And extracting the set inspection vibration limit speed DeltaV of each ground subarea in the extraction chamber i And checking the adaptation limit frequency deltap i Calculating a vibration signal second hollowness degree evaluation index ZD of each indoor ground subarea i The calculation formula is as follows:wherein->The correction factor corresponding to the set vibration speed and resonance frequency is shown.
Evaluation of first hollowness according to vibration signals of all indoor ground subareasThe index and the second hollowness degree evaluation index of the vibration signals of each indoor ground subarea calculate the vibration hollowness degree index D of each indoor ground subarea i The calculation formula is as follows:wherein->And->Respectively representing the set weight factors corresponding to the first empty degree evaluation index of the vibration signal and the second empty degree evaluation index of the vibration signal.
Further, the physical parameter acquisition is performed on each indoor ground subarea, and the specific process is as follows: air tightness inspection is carried out on each indoor ground subarea, and the air leakage rate QC of each indoor ground subarea of a specified building is extracted i Differential pressure YC i And extracting the air leakage standard rate delta QC of each ground subarea in the room i Standard differential pressure deltayc i Thereby calculating the air tightness degree coefficient of each floor subarea in the room, and recording as QM i 。
Further, the empty defect value of each ground subarea in the analysis room is specifically: according to the formula
Calculating the air tightness degree coefficient QM of each indoor ground subarea i Wherein sigma 1 Sum sigma 2 Respectively represent the set air leakage rate and the weight factor corresponding to the pressure difference.
According to the vibration hollowness degree index of each indoor ground subarea, the hollowness defect value omega of each indoor ground subarea is analyzed i The calculation formula is as follows:
wherein mu 1 Sum mu 2 The correction factors corresponding to the set vibration hollowness index and the air tightness coefficient are respectively indicated.
Further, the method is characterized in that the hollowness degree of each ground subarea in the room is analyzed and feedback prompt is carried out, and the method comprises the following specific processes: the empty defect value omega of each floor subarea in the room is calculated i And (5) importing an analysis model:
processing to obtain the hollowness degree of each floor subarea in the room, wherein [ X ] 1 ，Y 1 )、[X 2 ，Y 2 ) And [ X ] 3 ，Y 3 ) And sequentially representing the intervals of the reference values corresponding to the predefined slight degree, the predefined moderate degree and the predefined severe degree, and carrying out feedback prompt according to the hollowness degree of each indoor ground subarea.
The invention has the following beneficial effects:
(1) The method calculates the surface defect degree value of each ground subarea by analyzing the height difference of each ground subarea, the area of the defect area and the length and width of the crack, can be used for comparing the defect degrees among different ground subareas, identifying the problem area and taking corresponding repairing measures, and comprehensively evaluating the defect condition of the ground subarea, so that the evaluation is more comprehensive and accurate, the influence of artificial subjective judgment is reduced, and the scientificity of the subsequent empty degree judging process is increased;
(2) According to the invention, through analyzing the vibration speed, the reflection time difference, the resonance frequency, the peak amplitude and the bandwidth of each ground subarea, the structural condition of the ground is reflected more carefully, the tiny change and the empty problem of the ground subarea are detected, and through calculating the vibration empty degree index, the empty degree of the ground subarea can be quantized into specific numerical values, so that the ground empty degree can be recognized more accurately, a more efficient evaluation process is provided, the labor and time cost is reduced, comprehensive evaluation can be performed by combining a plurality of vibration parameters such as the resonance frequency, the peak amplitude and the bandwidth, more comprehensive ground empty degree information can be provided, the depth and the accuracy are increased for the evaluation result, the maintenance and repair decision are guided, and the ground quality and the safety of a building are improved;
(3) According to the invention, the air tightness degree coefficient of each ground subarea is calculated by analyzing the air leakage rate and the pressure difference of each ground subarea, so that the air tightness level of a building can be determined, and a lower air tightness level generally means that the building is more easily influenced by air leakage, so that the occurrence of the problem of ground hollowness is increased due to the lower air tightness level;
(4) According to the invention, the hollowing defect values of all the indoor ground subareas are imported into the analysis model to obtain the hollowing degree of all the areas of the indoor ground of the appointed building, the analysis model is built, the hollowing defect values of all the indoor ground subareas can be converted into quantitative evaluation indexes so as to clearly display and convey evaluation results, help to determine the hollowing degree of each area, classify the hollowing degree of each area from slight to severe so as to better understand the severity and the urgency of the problem, help to identify possible common problems or common characteristics, provide more comprehensive understanding for managers and maintenance personnel, and make proper repair priority and maintenance plan and provide guidance for related work;
of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
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description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1, the embodiment of the invention provides a technical scheme: a method for evaluating the hollowness degree of the indoor ground of a building comprises the following steps of
Specifically, the indoor ground area of the appointed building is divided, and the specific process is as follows: and carrying out panoramic scanning on the indoor ground areas of the appointed building, thereby dividing each indoor ground subarea and acquiring panoramic scanning images of each indoor ground subarea.
In this embodiment, the division of the indoor ground area of the specified building can more accurately locate and identify the specific area where the ground hollowing problem is located, the evaluation result of each sub-area can provide detailed information to help determine the ground area needing to be repaired or processed, so that the evaluation result is more accurate and concrete, and different ground sub-areas may have ground hollowing problems of different degrees.
Specifically, the surface defect degree value of each ground subarea in the room is calculated through preliminary analysis, and the specific process is as follows: according to the panoramic scanning image of each indoor ground subarea, comparing the panoramic scanning image with the standard panoramic image of each indoor ground subarea stored in the database, thereby extracting the area S of each apparent defect area of each indoor ground subarea Schizoib (mizobium) Each crack region is used for carrying out detection point layout on each indoor ground subarea, and the central point of each indoor ground subarea is taken as a core reference point, so that the statistics between each detection point of each indoor ground subarea and the corresponding core reference point is extracted and countedHeight difference H ij 。
Extracting defect factors corresponding to the reference height difference H' and the unit defect area stored in the database, and calculating a first defect index alpha of the surface of each indoor ground subarea i The calculation formula is as follows:wherein ε is 1 The defect factor corresponding to the unit defect area is represented by i, i=1, 2, 3..n, n, b, b=1, 2,3 … m, c, j, j=1, 2,3 … m, and m, respectively. Counting extension length L of each crack zone of each floor subarea in appointed building 1 And maximum width KL 1 And extracts the allowable extension length L 'and the allowable maximum width KL' of each crack region stored in the database.
Counting the quantity Q of cracks of each ground subarea in a specified building i And extracting defect factors corresponding to single cracks stored in the database.
Thereby calculating the crack defect degree value LF of each ground subarea in the room i The calculation formula is as follows:where l denotes the number of each crack region, l=1, 2,3 … m, h denotes the number of crack regions, ε 2 And epsilon 3 Correction factors epsilon corresponding to the set extension length and maximum width of the crack are respectively shown 4 Representing the defect factor corresponding to a single crack.
Calculating the surface defect degree value beta of each indoor ground subarea i The calculation formula is as follows:
wherein e represents a natural constant, phi 1 And phi 2 Respectively represent the set surfacesAnd correcting factors corresponding to the first defect index and the crack defect degree value.
In the embodiment, the surface defect degree value of each ground subarea is calculated by analyzing the height difference of each ground subarea, the area of the defect area and the length and width of the crack, so that the method can be used for comparing the defect degrees of different ground subareas, identifying the problem area and taking corresponding repairing measures, comprehensively evaluating the defect condition of the ground subarea, ensuring that the evaluation is more comprehensive and accurate, and reducing the influence of artificial subjective judgment.
In this embodiment, when there are multiple cracks on the ground, the breaking performance and stability of the ground may be affected, so that the possibility of producing a hollowing on the ground is increased, the multiple cracks may also cause uneven bearing capacity of the ground, further exacerbating the hollowing condition of the ground, the length of the crack refers to the length of the crack extending on the surface or underground of the ground, a longer crack may indicate that the damage degree of the ground is higher, this may result in increased vulnerability of the ground structure, and a long crack may expand or connect with other cracks, further increasing the risk of producing a hollowing on the ground, a wider crack may indicate that the breaking performance and displacement performance of the ground material are higher, and a wide crack provides more space for propagation of vibration waves, so as to increase the possibility of producing a hollowing on the ground.
In this embodiment, the difference in height of the floor sub-areas may result in uneven pressure or insufficient adhesion between the floor material and the substrate, thereby increasing the potential risk of floor hollowing, and a larger difference in height may increase the chance of uneven loading of the floor material and promote the formation of sloughing or voids.
In this embodiment, the larger the area of the defect area, the higher the risk of hollowing the ground, and the larger defect area may cause more voids or cracks, so that the hollowing phenomenon of the ground is more likely to occur.
In this embodiment, the length and width of the cracks are also relevant for ground void assessment, and longer and wider cracks may reveal foundation or construction problems, increasing the risk of ground void, which cracks may also lead to loosening and falling off of flooring material.
Specifically, the specific process of comparing and extracting the inspection parameters is as follows: extracting surface defect degree values of all indoor ground subareas, and matching the surface defect degree values with detection parameters corresponding to the set surface defect degree value intervals to obtain detection parameters corresponding to all indoor ground subareas, wherein the detection parameters comprise detection vibration limit speed, detection adaptation limit frequency, detection allowable peak amplitude, detection allowable bandwidth, air leakage standard rate and standard pressure difference.
In the embodiment, the comparison extracts the inspection parameters to obtain the inspection vibration limit speed, the inspection adaptation limit frequency, the inspection allowable peak amplitude, the inspection allowable bandwidth, the air leakage standard rate and the standard pressure difference corresponding to the surface defect value of each indoor ground subarea, and a data basis is provided for the subsequent calculation of the hollowing defect value of each indoor ground subarea of the specified building.
Specifically, the physical parameter acquisition is carried out on each indoor ground subarea, and the specific process is as follows: setting a plurality of monitoring time points, counting the acceleration values of vibration signals of all indoor ground subareas measured by the accelerometer in each monitoring time point, and preprocessing the acceleration signals, so as to construct an acceleration fluctuation line graph of the vibration signals of all indoor ground subareas.
Calculating vibration velocity V of each floor sub-area in a designated building i The calculation formula is as follows:
wherein a is i (t) represents the value of the vibration signal acceleration at the time point t, t represents the number of each monitoring time point, a i (t), r represents the number of monitoring time points.
And analyzing the indoor ground vibration signals, and thus calculating the vibration hollowness degree index of each indoor ground subarea.
In this embodiment, the vibration velocity is an integral of vibration acceleration over time, and the velocity signal can be obtained by integrating the acceleration signal.
Specifically, the indoor ground vibration signal is analyzed, and the specific process is as follows: and counting vibration signals of each indoor ground subarea in each monitoring time point, and accordingly constructing a vibration signal fluctuation line graph of each ground subarea.
Extracting the transmitting signal time point and the receiving signal time point of the vibration signals of each indoor ground subarea, and performing difference processing to obtain the reflection time difference T of the vibration signals of each indoor ground subarea Difference i 。
Performing spectrum analysis on the vibration signals of each indoor ground subarea to obtain the resonance frequency P of each indoor ground subarea i Peak amplitude F Web i Bandwidth D Web i Extracting the allowable peak amplitude F of vibration signals of each floor sub-area in the room Web i ' checking the allowable bandwidth D Web i ′。
Extracting a hollowness degree factor kappa corresponding to a predefined unit reflection time difference, thereby calculating a first hollowness degree evaluation index KP of vibration signals of each indoor ground subarea i The calculation formula is as follows:wherein gamma is 1 And gamma 2 The set peak amplitudes and the correction factors corresponding to the bandwidths are shown.
In this embodiment, an acceleration sensor is used to measure acceleration of vibration, so that vibration speed is calculated, and the reflection time difference can be obtained by performing position measurement and time synchronization by a plurality of vibration sensors.
In this embodiment, vibration signals are acquired, processed, and analyzed using a vibration analyzer, and a resonance testing device is used to detect the resonance frequency of a structure or system, while a spectrum analyzer can convert time domain signals to frequency domain signals and provide a spectral distribution of the signals.
In this embodiment, the vibration speed refers to the speed of the ground area under the vibration action, and a higher vibration speed may be an indication of the ground hollowness, which indicates that there is a loosening or cavitation phenomenon between the floor material and the base layer in the area, and by analyzing the vibration speed, the area where the ground hollowness may exist can be identified.
In this embodiment, the reflection time difference of the vibration signal refers to the time difference of reflection of the vibration wave signal on the ground area, the reflection time difference of different ground areas may reflect uniformity and consistency of the ground, and a larger reflection time difference may indicate that there is inconsistent or uneven connection between the ground material and the base layer, which may cause a problem of ground hollowness.
In this embodiment, the peak amplitude refers to the maximum amplitude of the vibration signal in the ground area, and a higher peak amplitude may indicate that there is a larger slack or void in the ground area, indicating the presence of a ground hollowing problem.
In this embodiment, the bandwidth refers to the width of the vibration signal in the frequency range, and a larger bandwidth in the frequency range may indicate that there are multiple vibration modes in the ground area, which may be an indication of a problem in connection between the ground material and the base layer, and may be related to the ground hollowness.
In this embodiment, the vibration speed refers to a propagation speed of the vibration wave in a vertical direction, and when the vibration speed is high, propagation energy of the vibration wave on the ground is high, which may cause the ground to generate a larger vibration, and increase the possibility of the ground hollowing.
In this embodiment, the reflection time difference of the vibration signal refers to the time difference of reflection of the vibration wave on the ground, and when the reflection time difference is relatively small, that is, the vibration signal is reflected on the ground for multiple times to generate resonance effect, the degree of ground hollowness may increase.
In this embodiment, the resonance frequency refers to the natural frequency of the vibration system, and may be understood as the resonance effect of a specific frequency when the vibration wave propagates on the ground, and when the frequency of the vibration wave matches with the resonance frequency of the ground, the resonance phenomenon may occur on the ground, increasing the risk of the ground hollowing.
In this embodiment, the peak amplitude refers to the maximum amplitude value of the vibration wave, and when the amplitude of the vibration wave is larger, the vibration energy is also larger, which may cause larger displacement and stress on the ground, and aggravate the hollowing situation on the ground.
In this embodiment, the bandwidth refers to the range of the vibration signal in frequency, and a wider bandwidth means that the vibration signal covers more frequency components, and when the bandwidth of the vibration signal is larger, the response of different frequency intervals on the ground may be affected, so that the possibility of ground hollowness is increased.
In this embodiment, by analyzing the vibration speed, the reflection time difference, the resonance frequency, the peak amplitude and the bandwidth of the vibration signal of each ground subarea, the micro change and the hollowing problem of the ground subarea are detected by more carefully reflecting the structural condition of the ground, and by calculating the vibration hollowing degree index, the hollowing degree of the ground subarea can be quantized into specific values, which is helpful for more accurately identifying the ground hollowing degree, a more efficient evaluation process is provided, the labor and time cost is reduced, and the comprehensive evaluation can be performed by combining a plurality of vibration parameters such as the resonance frequency, the peak amplitude and the bandwidth, so that more comprehensive ground hollowing degree information can be provided, the depth and the accuracy are increased for the evaluation result, which is helpful for guiding maintenance and repair decisions, and the ground quality and the safety of a building are improved.
Specifically, the vibration hollowness degree index of each indoor ground subarea is calculated, and the concrete process is as follows: extracting vibration velocity V of each floor sub-area in a designated building i And the resonance frequency P of each floor sub-area in the room i And extracting the set inspection vibration limit speed DeltaV of each ground subarea in the extraction chamber i And checking the adaptation limit frequency deltap i Calculating a vibration signal second hollowness degree evaluation index ZD of each indoor ground subarea i The calculation formula is as follows:wherein->The correction factor corresponding to the set vibration speed and resonance frequency is shown.
According to the first vibration signal of each floor subareaCalculating the vibration hollowness degree index D of each indoor ground subarea according to the hollowness degree evaluation index and the vibration signal second hollowness degree evaluation index of each indoor ground subarea i The calculation formula is as follows:wherein->And->Respectively representing the set weight factors corresponding to the first empty degree evaluation index of the vibration signal and the second empty degree evaluation index of the vibration signal.
In this embodiment, the resonance frequency refers to a frequency at which the ground area exhibits the maximum vibration amplitude under the vibration, and the resonance frequency of different ground areas may be related to the characteristics of the flooring material and the base layer, so that by analyzing the resonance frequency, the inherent characteristics of the ground area and possible structural problems including the presence of the ground hollows can be found.
Specifically, the physical parameter acquisition is carried out on each indoor ground subarea, and the specific process is as follows: air tightness inspection is carried out on each indoor ground subarea, and the air leakage rate QC of each indoor ground subarea of a specified building is extracted i Differential pressure QC i And extracting the air leakage standard rate delta QC of each ground subarea in the room i Standard differential pressure deltayc i Thereby calculating the air tightness degree coefficient of each floor subarea in the room, and recording as QM i 。
Specifically, the empty defect value of each ground subarea in the room is analyzed, and the specific process is as follows: according to the formulaCalculating the air tightness degree coefficient QM of each indoor ground subarea i Wherein sigma 1 Sum sigma 2 Respectively represent the set air leakage rate and the weight factor corresponding to the pressure difference.
According to the vibration hollowness degree index of each indoor ground subarea, the hollowness defect value omega of each indoor ground subarea is analyzed i The calculation formula is as follows:
wherein mu 1 Sum mu 2 The correction factors corresponding to the set vibration hollowness index and the air tightness coefficient are respectively indicated.
In this embodiment, by analyzing the air leakage rate, the pressure difference of each ground sub-area to calculate the air tightness degree coefficient of each ground sub-area, the air tightness level of the building can be determined by analyzing the air leakage rate and the pressure difference, and a lower air tightness level generally means that the building is more susceptible to air leakage, which may lead to potential energy waste and indoor air quality problems, and thus a lower air tightness level may increase the occurrence of ground hollowing problems.
Specifically, the hollowing degree of each ground subarea in the room is analyzed and feedback prompt is carried out, and the concrete process is as follows: the empty defect value omega of each floor subarea in the room is calculated i And (5) importing an analysis model:
processing to obtain the hollowness degree of each floor subarea in the room, wherein [ X ] i ，Y 1 )、[X 2 ，Y 2 ) And [ X ] 3 ，Y 3 ) And sequentially representing the intervals of the reference values corresponding to the predefined slight degree, the predefined moderate degree and the predefined severe degree, and carrying out feedback prompt according to the hollowness degree of each indoor ground subarea.
In this embodiment, the hollowing defect values of the indoor ground subareas of the building are led into the analysis model to obtain the hollowing degree of the indoor ground subareas of the appointed building, the analysis model is built, the hollowing defect values of the indoor ground subareas of the building can be converted into quantitative evaluation indexes, the indexes can be based on specific evaluation standards and thresholds so as to clearly display and convey evaluation results, the hollowing degree of each area can be determined, the hollowing degree of each area can be classified from slight to severe so as to better understand the severity and urgency of the problem, the manager and maintainer can be provided with comprehensive understanding, appropriate repair priority and maintenance plan can be formulated, and guidance is provided for related work.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. A method for evaluating the hollowness of the indoor floor of a building, comprising the steps of:
dividing the indoor ground area of a designated building, and primarily analyzing and calculating the surface defect degree value of each indoor ground subarea, so as to compare and extract the inspection parameters;
step two, collecting physical parameters of each indoor ground subarea, and analyzing empty drum defect values of each indoor ground subarea;
thirdly, according to the hollowness of each area of the indoor ground of the appointed building, analyzing the hollowness of each indoor ground subarea and carrying out feedback prompt;
the preliminary analysis calculates the surface defect degree value of each ground subarea in the room, and the specific process is as follows:
according to the panoramic scanning image of each indoor ground subarea, comparing the panoramic scanning image with the standard panoramic image of each indoor ground subarea stored in the database, thereby extracting the area S of each apparent defect area of each indoor ground subarea Schizoib (mizobium) And each crack region is used for carrying out detection point layout on each indoor ground subarea, and taking the central point of each indoor ground subarea as a core reference point, thereby extracting and counting the height difference H between each detection point of each indoor ground subarea and the corresponding core reference point ij ；
Extracting defect factors corresponding to the reference height difference H' and the unit defect area stored in the database, and calculating a first defect index alpha of the surface of each indoor ground subarea i The calculation formula is as follows:wherein ε is 1 A defect factor corresponding to a unit defect area is represented, i represents the number of each ground subregion, i=1, 2,3,..n, n represents the number of ground subregions, b represents the number of each apparent defect area, b=1, 2,3,..c, c represents the number of apparent defect areas, j represents the number of each detection point, j=1, 2,3,..m, m represents the number of detection points;
counting extension length L of each crack zone of each floor subarea in appointed building 1 And maximum width KL 1 And extracting the allowable extension length L ' and the allowable maximum width KL ' of each crack region stored in the database '
Statistical designation buildingNumber Q of cracks of each ground subarea in object room i Extracting defect factors corresponding to single cracks stored in a database;
thereby calculating the crack defect degree value LF of each ground subarea in the room i The calculation formula is as follows:where l denotes the number of each crack region, l=1, 2,3,..h, h denotes the number of crack regions, ε 2 And epsilon 3 Correction factors epsilon corresponding to the set extension length and maximum width of the crack are respectively shown 4 Representing defect factors corresponding to single cracks;
calculating the surface defect degree value beta of each indoor ground subarea i The calculation formula is as follows:wherein e represents a natural constant, Φ 1 And phi is 2 Respectively representing the set correction factors corresponding to the first defect index and the crack defect degree value of the surface;
the method is characterized in that the hollowness degree of each ground subarea in the room is analyzed and feedback prompt is carried out, and the specific process is as follows:
the empty defect value omega of each floor subarea in the room is calculated i And (5) importing an analysis model:
，
processing to obtain the hollowness degree of each floor subarea in the room, wherein [ X ] 1 ，Y 1 )、[X 2 ，Y 2 ) And [ X ] 3 ，Y 3 ) And sequentially representing the intervals of the reference values corresponding to the predefined slight degree, the predefined moderate degree and the predefined severe degree, and carrying out feedback prompt according to the hollowness degree of each indoor ground subarea.
2. The method for evaluating the hollowness of the indoor floor of a building according to claim 1, wherein: the specific process for dividing the indoor ground area of the appointed building comprises the following steps:
and carrying out panoramic scanning on the indoor ground areas of the appointed building, thereby dividing each indoor ground subarea and acquiring panoramic scanning images of each indoor ground subarea.
3. The method for evaluating the hollowness of the indoor floor of a building according to claim 1, wherein: the specific process of comparing and extracting the inspection parameters is as follows:
extracting surface defect degree values of all indoor ground subareas, and matching the surface defect degree values with detection parameters corresponding to the set surface defect degree value intervals to obtain detection parameters corresponding to all indoor ground subareas, wherein the detection parameters comprise detection vibration limit speed, detection adaptation limit frequency, detection allowable peak amplitude, detection allowable bandwidth, air leakage standard rate and standard pressure difference.
4. A method for evaluating the hollowness of the indoor floor of a building according to claim 3, wherein: the physical parameter acquisition is carried out on each indoor ground subarea, and the specific process is as follows:
setting a plurality of monitoring time points, counting the acceleration values of vibration signals of all indoor ground subareas measured by the accelerometer in each monitoring time point, and preprocessing the acceleration signals, so as to construct a vibration signal acceleration fluctuation line diagram of all indoor ground subareas;
calculating vibration velocity V of each floor sub-area in a designated building i The calculation formula is as follows:wherein a is i (t) represents a value of the vibration signal acceleration at a time point t, t represents a number of each monitoring time point, t=1, 2,..r, r represents the number of monitoring time points;
and analyzing the indoor ground vibration signals, and thus calculating the vibration hollowness degree index of each indoor ground subarea.
5. The method for evaluating the hollowness of the indoor floor of a building according to claim 4, wherein: the method is characterized by analyzing the indoor ground vibration signal, and comprises the following specific processes:
counting vibration signals of indoor ground subareas in each monitoring time point, and accordingly constructing a vibration signal fluctuation line graph of each ground subarea;
extracting the transmitting signal time point and the receiving signal time point of the vibration signals of each indoor ground subarea, and performing difference processing to obtain the reflection time difference T of the vibration signals of each indoor ground subarea Difference i ；
Performing spectrum analysis on the vibration signals of each indoor ground subarea to obtain the resonance frequency P of each indoor ground subarea i Peak amplitude F Web i Bandwidth D Web i Extracting the allowable peak amplitude F of vibration signals of each floor sub-area in the room Web i ' checking the allowable bandwidth D Web i 'A'; extracting a hollowness degree factor kappa corresponding to a predefined unit reflection time difference, thereby calculating a first hollowness degree evaluation index KP of vibration signals of each indoor ground subarea i The calculation formula is as follows:wherein, gamma 1 And gamma 2 The set peak amplitudes and the correction factors corresponding to the bandwidths are shown.
6. The method for evaluating the hollowness of the indoor floor of a building according to claim 5, wherein the method comprises the following steps of: the method for calculating the vibration hollowness degree index of each indoor ground subarea comprises the following specific processes:
extracting vibration velocity V of each floor sub-area in a designated building i And the resonance frequency P of each floor sub-area in the room i And extracting the set inspection vibration limit speed DeltaV of each ground subarea in the extraction chamber i And checking the adaptation limit frequency deltap i Calculating a vibration signal second hollowness degree evaluation index of each indoor ground subareaZD i The calculation formula is as follows:wherein->A correction factor corresponding to the set vibration speed and resonance frequency is represented; estimating an index KP according to a first hollowness degree of vibration signals of each indoor ground subarea i Vibration signal second hollowness degree evaluation index ZD of each indoor ground subarea i Calculating the vibration hollowness degree index D of each indoor ground subarea i The calculation formula is as follows: />Wherein->And->Respectively representing the set weight factors corresponding to the first empty degree evaluation index of the vibration signal and the second empty degree evaluation index of the vibration signal.
7. The method for evaluating the hollowness of the indoor floor of a building according to claim 6, wherein: the physical parameter acquisition is carried out on each indoor ground subarea, and the specific process is as follows: air tightness inspection is carried out on each indoor ground subarea, and the air leakage rate QC of each indoor ground subarea of a specified building is extracted i Differential pressure YC i And extracting the air leakage standard rate delta QC of each ground subarea in the room i Standard differential pressure deltayc i Thereby calculating the air tightness degree coefficient of each floor subarea in the room, and recording as QM i 。
8. The method for evaluating the hollowness of the indoor floor of a building according to claim 7, wherein: each ground subarea in the analysis chamberThe empty defect value comprises the following specific processes: calculating the air tightness degree coefficient QM of each indoor ground subarea according to a formula i ，Wherein sigma 1 Sum sigma 2 Respectively representing the set air leakage rate and the weight factor corresponding to the pressure difference; according to the vibration hollowness degree index of each indoor ground subarea, the hollowness defect value omega of each indoor ground subarea is analyzed i The calculation formula is as follows:wherein mu 1 Sum mu 2 The correction factors corresponding to the set vibration hollowness index and the air tightness coefficient are respectively indicated.
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