A method and system for locating water seepage position in a house

Abstract

The invention discloses a method and system for locating a water seepage position in a house, and relates to the technical field of water seepage detection in a house. The method comprises: detecting a house based on an ultrasonic positioning technology to obtain house structure coordinate data; converting the house structure coordinate data based on a point cloud reconstruction technology and a parameter modeling technology to generate a house structure diagram, wherein the house structure diagram comprises a house internal space structure diagram and a wall internal structure diagram; passing water through each water pipe of the house, and stopping the water passing after a set water passing time is reached; the method and system for locating a water seepage position in a house can construct a structure diagram of a house that needs to be located for the water seepage position through ultrasonic detection, and can monitor the fine water flow sound in the house through monitoring an ultrasonic sensor, locate the water flow sound, and at the same time, combine with the structure diagram of the house to judge whether the position of the water flow sound is abnormal, thereby quickly locking the position of the abnormal water flow sound, and realizing the rapid positioning of the cause of the leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of house water seepage detection, and in particular to a house water seepage location positioning method and system. Background Art

[0002] Water seepage and leakage in houses are common problems in construction projects. Houses may seep and leak due to unqualified waterproof construction, aging of waterproof materials, damage to waterproof materials or buildings, etc. Therefore, it is particularly important to detect water seepage and leakage in houses in a timely manner to ensure the safety of houses. For example, the prior art with the publication number of CN117094594A discloses an intelligent detection, analysis and evaluation system for water seepage and leakage in walls of construction projects, including a building division module, a building collection module, a building comprehensive analysis module, a leakage level estimation and identification module, a leakage source matching module, a management database and an early warning display terminal. The prior art can detect the walls according to the division of each building detection area according to the key parts of the building, and obtain leakage data including the water content of the building wall, the length of the wall water mark, the number of water drops, the wall mildew area and the wall color change area, and then obtain the leakage severity evaluation coefficient, effectively detect the potential water seepage possibility of each key area of ​​the building, and evaluate and predict the leakage possibility of each remaining area, determine the expected work of water seepage and leakage in the wall of the construction project, reduce the loss of wall repair, and achieve efficient and timely management of the building.

[0003] However, in the prior art, usually after water seepage or leakage in a house, it is only necessary to judge whether there is leakage on the wall or floor by the traces of leakage on the wall or floor of the house, and to detect and locate the leakage position on the wall or floor. However, it is impossible to quickly locate the cause of the leakage, such as the rupture of the pre-buried water pipes in the wall or floor, the aging of the seals of the water pipe connectors, etc. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for locating water seepage in a house to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a method for locating a water seepage position in a house, comprising the following steps:

[0006] S1. Detecting the house based on ultrasonic positioning technology to obtain house structure coordinate data, and converting the house structure coordinate data to generate a house structure diagram based on point cloud reconstruction technology and parametric modeling technology, wherein the house structure diagram includes a house interior space structure diagram and a wall interior structure diagram, wherein the house interior space structure diagram reflects the spatial layout and style of the house, and the wall interior structure diagram reflects the position and structure of the pre-buried pipes and lines in the house wall;

[0007] S2. Water is passed through each water pipe of the house, and the water is stopped after the set water passing time is reached. The water pipes include various water supply pipes and drainage pipes of the house. The water supply pipes can be passed through by turning on the faucet, and the water supply and drainage pipes can be passed through by opening the sink plug, flushing the toilet, and injecting water into the pipe opening of the drainage pipe, so that there is a large amount of water flow sound data in the water supply pipe and the drainage pipe, which is convenient for subsequent picking up of the water flow sound data in the water supply pipe and the drainage pipe;

[0008] S3, start picking up the sound within the house while the water is flowing, and obtain water flow sound data;

[0009] S4, taking the time of stopping water flow as a node, dividing the water flow sound data to obtain the first water flow sound data from the start of water flow to the stop of water flow, and the second water flow sound data after the stop of water flow;

[0010] S5. Analyze and process the first water flow sound data based on TDOA and Beamforming spatial spectrum estimation to obtain the first water flow sound position;

[0011] S6. Obtain the position of the water pipe in the internal structure diagram of the wall through the coordinate data of the first water flow sound position and the internal structure diagram of the wall, and mark the water pipe structure diagram in the internal structure diagram of the wall;

[0012] S7, analyzing and processing the second water flow sound data based on TDOA and Beamforming spatial spectrum estimation to obtain a second water flow sound position;

[0013] S8, based on the coordinate data of the water pipe in the wall internal structure diagram and the second water flow sound position, determining whether the second water flow sound position is outside the water pipe structure diagram;

[0014] S9. If so, it is determined that there is leakage, and the second water flow sound position is marked to obtain the abnormal water flow position. At the same time, the water pipe structure diagram whose height is not lower than the abnormal water flow position and is closest to the abnormal water flow position is marked to obtain the abnormal water pipe position, so as to facilitate maintenance personnel to detect the water pipes at the abnormal water pipe position and quickly obtain the leakage position of the water pipe, thereby reducing the scope of inspection for maintenance personnel and improving the efficiency of detecting the water seepage position.

[0015] Furthermore, the S1 comprises the following steps:

[0016] Use ultrasonic waves to detect the interior space of the house and obtain a structural diagram of the interior space of the house;

[0017] The frequency of the ultrasonic wave is lowered to detect the interior space of the house, and a structure diagram of the interior space of the house to be corrected is obtained; based on the structure diagram of the interior space of the house, the map of the interior space of the house to be corrected is corrected, and correction parameters for ultrasonic correction at each frequency are obtained;

[0018] The frequency of the ultrasonic wave is lowered to detect the internal structure of the wall of the house, and the internal structure diagram of the wall is obtained in combination with the correction parameters, and the internal space structure diagram of the house detected by the ultrasonic wave after the frequency is reduced is corrected by using the internal space structure diagram of the house detected by the ultrasonic wave with high detection accuracy of the high-frequency ultrasonic wave, thereby compensating for a part of the detection accuracy reduced due to the reduction of the ultrasonic frequency, thereby improving the accuracy of the internal structure of the wall detected by the ultrasonic wave after the frequency is reduced, so that the obtained internal space structure diagram of the house is more accurate;

[0019] The house structure diagram is obtained by combining the house interior space structure diagram with the wall interior structure diagram.

[0020] Furthermore, the method of reducing the frequency of ultrasonic waves to detect the interior space of a house comprises the following steps:

[0021] Adjust the ultrasonic cycle to the set number of times within the set frequency range;

[0022] Obtain the reflected waves of ultrasonic waves of various frequencies when encountering objects, and extract the frequency of the reflected waves with the largest signal strength when encountering each object in the wall, and obtain the optimal frequency for detecting the corresponding object, where the optimal frequency for detecting an object can be a value or an interval. The frequency of the reflected wave with the largest signal strength when the ultrasonic wave encounters an object in the wall and the frequencies before and after that do not exceed the set value can be selected as the optimal frequency for detecting the object;

[0023] Obtain the optimal frequency for detecting each object, and set the adjustment frequency to cyclically adjust the ultrasonic wave within the optimal frequency range for detecting each object. For example, if the adjustment frequency is set to 1 Hz, the ultrasonic wave is adjusted within the optimal frequency range for detecting each object once per second to complete one cycle;

[0024] Use cyclically modulated ultrasonic waves to detect spaces inside a house.

[0025] Furthermore, the S6 further comprises the following steps:

[0026] Correct the first water flow sound position corresponding to the position of the water pipe structure diagram to obtain the first water flow sound correction position;

[0027] Based on the first water flow sound correction position and the corresponding first water flow sound position, a corresponding correction parameter is obtained.

[0028] Furthermore, the step S7 further includes the following steps:

[0029] The second water flow sound position is corrected based on the correction parameter to obtain a new second water flow sound position.

[0030] Furthermore, the S8 further comprises the following steps:

[0031] Determine whether the first water flow sound correction position has a portion beyond the water pipe structure diagram;

[0032] If so, a short-time Fourier transform is performed on the first water flow sound data to obtain a first water flow sound data spectrum diagram, wherein the first water flow sound data spectrum diagram is the time-frequency domain data of the first water flow sound data, and shows the frequency components of the first water flow sound data that change with time, so that the distribution of sound frequencies in the first water flow sound data can be obtained through the first water flow sound data spectrum diagram;

[0033] Based on the first water flow sound data spectrum diagram, obtaining the distribution of the first water flow sound data at each time point and each frequency;

[0034] Based on the distribution of the first water flow sound data at each time point and each frequency, the abnormal frequency is screened out, and the first water flow sound data corresponding to the abnormal frequency is marked as the first abnormal water flow sound data, wherein the time-frequency domain data of the first water flow sound data corresponding to the abnormal frequency can be transformed to the time domain through an inverse short-time Fourier transform to obtain the first water flow sound data corresponding to the abnormal frequency, that is, the first abnormal water flow sound data;

[0035] Based on the first abnormal water flow sound data and the correction parameters, the position of the first abnormal water flow sound data is calculated to obtain the first abnormal water flow sound position, which can directly locate the water pipe leakage position when the water pipe leakage is relatively serious, such as when there are cracks in the water pipe so that water in the water pipe seeps out through the cracks.

[0036] A house water seepage location positioning system, comprising an ultrasonic sensor, a house model building module, a detection and adjustment module, a water flow sound data positioning module, and an abnormality judgment module;

[0037] There are multiple ultrasonic sensors, which are placed in an array, and the angles and distances between the ultrasonic sensors are known;

[0038] The house model building module is used to build a house structure diagram based on the ultrasonic wave emitted by the ultrasonic sensor to detect the house and the corresponding reflected wave;

[0039] The detection adjustment module is used to adjust the ultrasonic frequency emitted by the ultrasonic sensor when the house model construction module constructs the house structure diagram based on the ultrasonic sensor;

[0040] The water flow sound data positioning module is used to pick up water flow sound data based on the ultrasonic sensor, and locate the sound source position of the water flow sound data to obtain a first water flow sound position and a second water flow sound position;

[0041] The abnormality judgment module is used to mark the water pipe structure diagram in the house structure diagram based on the detection and adjustment module and the water flow sound data positioning module;

[0042] The abnormality judgment module is also used to judge whether the sound source position of the water flow sound data is abnormal based on the relationship between the sound source position of the water flow sound data and the water pipe structure diagram, and mark the abnormal sound source position of the water flow sound data when it is abnormal, and mark the abnormal water pipe position according to the sound source position of the abnormal water flow sound data, that is, mark the first abnormal water flow sound position, the abnormal water flow position and the abnormal water pipe position.

[0043] 1. Compared with the prior art, the present invention provides a method and system for locating the position of water seepage in a house. Through ultrasonic detection, a structural diagram of the house where the water seepage position needs to be located can be constructed, and the ultrasonic sensor can be used to monitor the tiny sound of water flow in the house, and the water flow sound can be located. At the same time, combined with the structural diagram of the house, it is determined whether the position of the water flow sound is abnormal, thereby quickly locking the position of the abnormal water flow sound, thereby realizing the rapid location of the cause of the leakage.

[0044] 2. Compared with the prior art, the present invention provides a method and system for locating the position of water seepage in a house. By changing the frequency of ultrasound, the penetration of ultrasound can be increased to detect the internal structure of the house wall. At the same time, the detection and positioning results of ultrasound with a higher frequency can be used to correct the detection and positioning results of ultrasound with a lower frequency, thereby improving the accuracy of lower frequency ultrasound detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0046] Figure 1 A method step diagram provided for an embodiment of the present invention;

[0047] Figure 2 A system structure block diagram provided for an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0049] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0051] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0052] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0053] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of the features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure.

[0055] See also Figure 1 , a method for locating a water seepage position in a house, comprising the following steps:

[0056] S1. Detect the house based on ultrasonic positioning technology to obtain the house structure coordinate data, and convert the house structure coordinate data into a house structure diagram based on point cloud reconstruction technology and parametric modeling technology. The house structure diagram includes a house internal space structure diagram and a wall internal structure diagram, wherein the house internal space structure diagram reflects the spatial layout and style of the house, and the wall internal structure diagram reflects the position and structure of the pre-buried pipes and lines in the house wall, specifically including the following steps:

[0057] S1.1. Use ultrasonic waves to detect the interior space of the house and obtain a structural diagram of the interior space of the house;

[0058] For example, TOF (Time of Flight) ranging and TIDOA (Time Difference of Arrival) are used to locate the coordinates of each point in the structure of the house;

[0059] In one embodiment, positioning includes the following steps: 1. Transmitter positioning: fix the ultrasonic transmitter at the geometric center of the room (such as the center of the ceiling), and use an omnidirectional transmitter to cover 360 degrees of sound wave radiation; 2. Receiver array: arrange 4 groups of receivers along the diagonal of the room (two or more meters apart), and install them at a height of 1.2-1.5 meters to avoid being blocked by common furniture; 3. When measuring the height, add a downward-emitting ultrasonic module in the center of the ceiling, and cooperate with the ground reflector to form a vertical measurement system; 4. Corner calibration: set a reference reflector at the angle of the wall (it is recommended to use a 30×30cm metal pole) to eliminate multipath interference errors;

[0060] Through the above embodiment, a coordinate data set of the house structure can be obtained. Based on point cloud reconstruction and parametric modeling techniques, the coordinate data set can be converted into a three-dimensional model. The following steps can be adopted:

[0061] 1. Use CloudCompare, Open3D, etc. to preprocess the coordinate data, including denoising (such as statistical filtering, radius filtering), downsampling, and coordinate alignment (such as ICP registration);

[0062] 2. Use CloudCompare or MeshLab to load point cloud data and generate a 3D mesh;

[0063] 3. Use Rhino or SketchUp to create the main geometric shapes of the building based on the imported 3D coordinate data. Use these coordinate points as a reference to form the model by creating curves, surfaces and blocks;

[0064] 4. Use Cycles or Eevee renderer in Blender to generate high-quality rendered images, or use 3dsMax with rendering plug-ins such as V-Ray to generate visualization effects of building models;

[0065] S1.2. Lower the frequency of the ultrasonic wave to detect the interior space of the house, obtain the structure diagram of the interior space of the house to be corrected, correct the structure diagram of the interior space of the house to be corrected based on the structure diagram of the interior space of the house, and obtain the correction parameters for the ultrasonic wave correction at each frequency;

[0066] S1.3. The frequency of the ultrasonic wave is lowered to detect the internal structure of the wall of the house, and the internal structure diagram of the wall is obtained by combining the correction parameters. The internal space structure diagram of the house with high detection accuracy of the high-frequency ultrasonic wave is used to correct the internal space structure diagram of the house detected by the ultrasonic wave after the frequency is reduced, thereby compensating for a part of the detection accuracy reduced due to the reduction of the ultrasonic frequency, thereby improving the accuracy of the internal structure of the wall detected by the ultrasonic wave after the frequency is reduced, so that the obtained internal space structure diagram of the house is more accurate;

[0067] Furthermore, the frequency of the ultrasonic wave can be adjusted according to the frequency cycle, and then by comparing the clarity of the detection results of the ultrasonic waves of different frequencies, the amount by which the ultrasonic wave frequency needs to be reduced when detecting each structure in the house can be determined. For example, the following steps can be performed:

[0068] a. Adjust the ultrasonic cycle to the set number of times within the set frequency range;

[0069] b. Obtain the reflected waves of ultrasonic waves of various frequencies when encountering objects, and extract the frequency of the reflected waves with the largest signal strength when encountering each object in the wall, and obtain the optimal frequency for detecting the corresponding object, where the optimal frequency for detecting the object can be a value or an interval. The frequency of the reflected wave with the largest signal strength when the ultrasonic wave encounters the object in the wall and the frequencies before and after that do not exceed the set value can be selected as the optimal frequency for detecting the object;

[0070] c. Obtain the optimal frequency for detecting each object, and set the adjustment frequency to cyclically adjust the ultrasonic wave within the optimal frequency range for detecting each object. For example, if the adjustment frequency is set to 1 Hz, the ultrasonic wave is adjusted within the optimal frequency range for detecting each object once per second to complete one cycle;

[0071] d. Use cyclically regulated ultrasonic waves to detect the space inside the house;

[0072] S1.4. The house interior space structure diagram is combined with the wall interior structure diagram to obtain the house structure diagram. The house interior space structure diagram and the wall interior structure diagram may be overlapped after the coordinates are aligned, and the overlapped portion of the house interior space structure diagram and the wall interior structure diagram is set transparent so as to display the wall interior structure diagram.

[0073] S2. Water is passed through each water pipe of the house, and the water is stopped after the set water passing time is reached. The water pipes include various water supply pipes and drainage pipes of the house. The water supply pipes can be passed through by turning on the faucet, and the water supply and drainage pipes can be passed through by opening the sink plug, flushing the toilet, and injecting water into the pipe opening of the drainage pipe, so that there is a large amount of water flow sound data in the water supply pipe and the drainage pipe, which is convenient for subsequent picking up of the water flow sound data in the water supply pipe and the drainage pipe;

[0074] In one embodiment, the speed and sound of water flow can be increased by increasing the water flow pressure to facilitate the pickup of water flow sound. The bursting pressure of general household water pipes PPR pipes (conventional models with a pressure resistance of 1.6MPa) and PVC-U pipes (conventional models with a pressure resistance of 1.0-1.6MPa) is generally 2-3 times the above value. Here, pressurized water flow is a short-term water flow so it only needs to not exceed the bursting pressure. For example, when the water flow sound is not clearly picked up, a water pump can be used to increase the water pressure to 1-2MPa, and the pressure can be increased in an incremental manner until the water flow sound is clearly picked up; the water flow time, that is, the time for picking up the water flow sound, can be 1-3min.

[0075] S3. Start picking up the sound within the house while the water is flowing to obtain water flow sound data.

[0076] S4. Taking the time of stopping water flow as a node, split the water flow sound data to obtain the first water flow sound data from the start of water flow to the stop of water flow, and the second water flow sound data after the stop of water flow.

[0077] S5. Analyze and process the first water flow sound data based on TDOA and Beamforming spatial spectrum estimation to obtain the first water flow sound position;

[0078] In one embodiment, the first water flow sound position can be obtained by the following steps:

[0079] (1) Multi-node deployment: Install multiple high-sensitivity microphones or hydrophones in the target area (such as a plane 1-3 cm away from the wall) to form a sensor network (3 nodes are recommended). (2) Spatial coverage: Ensure that the sensor spacing is less than half the wavelength of the sound wave. For example, when the main frequency of the water flow sound is 1K2, the spacing needs to be <17cm) to avoid spatial aliasing. After preprocessing the first water flow sound data (such as bandpass filtering), use the beamforming method and microphone array: use a circular / linear array for spatial filtering; use the MvVDR algorithm: minimum variance distortion-free response beamforming to enhance specific direction signals; (3) Environmental compensation: collect 10 seconds of background noise every 30 minutes and update the noise floor; sound velocity correction: integrate a temperature sensor to adjust the sound velocity parameters in real time; (4) Visual output: obtain the coordinates corresponding to the first water flow sound, that is, the first water flow sound position, through data preprocessing (bandpass filtering), TDOA time difference calculation, and Beamforming spatial spectrum estimation for coordinate solution. Notes: 1. Sampling rate: greater than or equal to 4KHz (meet the 2KHz frequency band requirement. 2. Synchronization accuracy: the clock synchronization error of each sensor is less than 10 microseconds. 3. Error correction: consider the acoustic impedance of the pipeline wall (the sound velocity of the steel pipe is about 500omls).

[0080] S6. Obtain the position of the water pipe in the wall internal structure diagram through the first water flow sound position and the wall internal structure diagram, and mark the water pipe structure diagram in the wall internal structure diagram; correct the corresponding first water flow sound position based on the position of the water pipe structure diagram to obtain the first water flow sound correction position; obtain the corresponding correction parameter based on the first water flow sound correction position and the corresponding first water flow sound position;

[0081] The pipes in the internal structure diagram of the wall can be annotated manually first, and then the pipe closest to the first water flow sound position can be calculated based on the Euclidean distance formula to obtain the water pipe corresponding to the first water flow sound, and the corresponding correction parameters can be obtained based on the deviation between the coordinates of the first water flow sound position and the coordinates of the corresponding water pipe.

[0082] S7. Analyze and process the second water flow sound data based on TDOA and Beamforming spatial spectrum estimation to obtain a second water flow sound position; correct the second water flow sound position based on the correction parameter to obtain a new second water flow sound position. The second water flow sound position obtained by analyzing the second water flow sound data is similar to the first water flow sound position obtained by analyzing the first water flow sound.

[0083] S8. Determine whether the second water flow sound position is outside the water pipe structure diagram.

[0084] S9. If so, it is determined that there is leakage, and the second water flow sound position is marked to obtain the abnormal water flow position. At the same time, the water pipe structure diagram whose height is not lower than the abnormal water flow position and is closest to the abnormal water flow position is marked to obtain the abnormal water pipe position, so as to facilitate maintenance personnel to detect the water pipe at the abnormal water pipe position and quickly obtain the leakage position of the water pipe, thereby reducing the scope of inspection for maintenance personnel and improving the efficiency of detecting the water seepage position.

[0085] The coordinates corresponding to the first water flow sound in the house structure diagram can be displayed in a color different from that of the house structure diagram (e.g., the house structure diagram is white with black, and the coordinates corresponding to the first water flow sound are marked in blue), and the second water flow sound position is marked in red. If the red mark is outside the range of the blue mark (the first water flow sound position), it means that the second water flow sound position is outside the water pipe structure diagram; or if the coordinates corresponding to the second water flow sound position are not within the coordinate range corresponding to the first water flow sound, it means that the second water flow sound position is outside the water pipe structure diagram.

[0086] Whether the first water flow sound position (i.e., the water pipe position) is higher than the second water flow sound position (i.e., the abnormal water flow position) can be determined by comparing the sizes of the data on the coordinate Z axis corresponding to the first water flow sound and the second water flow sound. The water pipe corresponding to the first water flow sound position is manually divided into multiple sections, and the first centroid coordinates of the first water flow sound position and the second centroid coordinates of the second water flow sound position corresponding to each section of the water pipe are calculated. The distance between the second centroid coordinates and each first centroid coordinate is calculated based on the Euclidean distance formula, and the first water flow sound position (coordinate) with the smallest calculated distance and the largest data on the coordinate Z axis is marked with a color (such as yellow).

[0087] The method also includes:

[0088] Determine whether the first water flow sound correction position has a portion that exceeds the water pipe structure diagram;

[0089] If so, a short-time Fourier transform is performed on the first water flow sound data to obtain a first water flow sound data spectrum diagram, wherein the first water flow sound data spectrum diagram is the time-frequency domain data of the first water flow sound data, and shows the frequency components of the first water flow sound data that change with time, so that the distribution of sound frequencies in the first water flow sound data can be obtained through the first water flow sound data spectrum diagram;

[0090] Based on the first water flow sound data spectrum diagram, obtaining the distribution of the first water flow sound data at each time point and each frequency;

[0091] Based on the distribution of the first water flow sound data at each time point and each frequency, the abnormal frequency is screened out, and the first water flow sound data corresponding to the abnormal frequency is marked as the first abnormal water flow sound data, wherein the time-frequency domain data of the first water flow sound data corresponding to the abnormal frequency can be transformed to the time domain through an inverse short-time Fourier transform to obtain the first water flow sound data corresponding to the abnormal frequency, that is, the first abnormal water flow sound data;

[0092] Based on the first abnormal water flow sound data and the correction parameters, the position of the first abnormal water flow sound data is calculated to obtain the first abnormal water flow sound position, which can directly locate the water pipe leakage position when the water pipe leakage is relatively serious, such as when there are cracks in the water pipe so that water in the water pipe seeps out through the cracks.

[0093] See also Figure 2 , the present invention also provides a house water seepage location positioning system, including an ultrasonic sensor, a house model building module, a detection and adjustment module, a water flow sound data positioning module, and an abnormality judgment module;

[0094] There are multiple ultrasonic sensors, which are placed in an array, and the angles and distances between the ultrasonic sensors are known;

[0095] The house model building module is used to build a house structure diagram based on the ultrasonic wave emitted by the ultrasonic sensor to detect the house and the corresponding reflected wave;

[0096] The detection adjustment module is used to adjust the ultrasonic frequency emitted by the ultrasonic sensor when the house model construction module constructs the house structure diagram based on the ultrasonic sensor;

[0097] The water flow sound data positioning module is used to pick up the water flow sound data based on the ultrasonic sensor, and locate the sound source position of the water flow sound data to obtain a first water flow sound position and a second water flow sound position;

[0098] The abnormality judgment module is used to mark the water pipe structure diagram in the house structure diagram based on the detection and adjustment module and the water flow sound data positioning module;

[0099] The abnormality judgment module is also used to judge whether the sound source position of the water flow sound data is abnormal based on the relationship between the sound source position of the water flow sound data and the water pipe structure diagram, and mark the abnormal sound source position of the water flow sound data when it is abnormal, and mark the abnormal water pipe position according to the sound source position of the abnormal water flow sound data, that is, mark the first abnormal water flow sound position, the abnormal water flow position and the abnormal water pipe position.

[0100] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for locating water seepage in a house, characterized in that: The following steps are involved: S1. Detecting a house based on ultrasonic positioning technology to obtain house structure coordinate data, and converting the house structure coordinate data to generate a house structure diagram based on point cloud reconstruction technology and parametric modeling technology, wherein the house structure diagram includes a house internal space structure diagram and a wall internal structure diagram; S2, water is supplied to each water pipe of the house, and water supply is stopped after the set water supply time is reached; S3, start picking up the sound within the house while the water is flowing, and obtain water flow sound data; S4, taking the time of stopping water flow as a node, dividing the water flow sound data to obtain the first water flow sound data from the start of water flow to the stop of water flow, and the second water flow sound data after the stop of water flow; S5. Analyze and process the first water flow sound data based on TDOA, beamforming, and spatial spectrum estimation to obtain a first water flow sound position; S6. Obtain the position of the water pipe in the internal structure diagram of the wall through the coordinate data of the first water flow sound position and the internal structure diagram of the wall, and mark the water pipe structure diagram in the internal structure diagram of the wall; S7, analyzing and processing the second water flow sound data based on TDOA, beamforming and spatial spectrum estimation to obtain a second water flow sound position; S8, based on the coordinate data of the water pipe in the wall internal structure diagram and the second water flow sound position, determining whether the second water flow sound position is outside the water pipe structure diagram; S9. If yes, determine that there is leakage, and mark the second water flow sound position to obtain the abnormal water flow position. At the same time, mark the water pipe structure diagram whose height is not lower than the abnormal water flow position and is closest to the abnormal water flow position to obtain the abnormal water pipe position.

2. A method for locating a water seepage position in a house according to claim 1, characterized in that: The S1 comprises the following steps: Use ultrasonic waves to detect the interior space of the house and obtain a structural diagram of the interior space of the house; The frequency of the ultrasonic wave is lowered to detect the interior space of the house, and a structure diagram of the interior space of the house to be corrected is obtained; based on the structure diagram of the interior space of the house, the map of the interior space of the house to be corrected is corrected, and correction parameters for ultrasonic correction at each frequency are obtained; Lowering the frequency of the ultrasonic wave to detect the internal structure of the wall of the house, and combining the correction parameters to obtain an internal structure diagram of the wall; The house structure diagram is obtained by combining the house interior space structure diagram with the wall interior structure diagram.

3. A method for locating a water seepage position in a house according to claim 2, characterized in that: The method of reducing the frequency of ultrasonic waves to detect the interior space of the house comprises the following steps: Adjust the ultrasonic cycle to the set number of times within the set frequency range; Obtain the reflected waves of ultrasonic waves of various frequencies when they encounter objects, and extract the frequency of the reflected waves with the largest signal strength when encountering various objects in the wall, and obtain the optimal frequency for detecting the corresponding object; Obtain the optimal frequency for detecting each object, and set the adjustment frequency to cyclically adjust the ultrasonic wave within the optimal frequency range for detecting each object; Use cyclically modulated ultrasonic waves to detect spaces inside a house.

4. A method for locating a water seepage position in a house according to claim 1, characterized in that: The S6 further comprises the following steps: Correct the first water flow sound position corresponding to the position of the water pipe structure diagram to obtain the first water flow sound correction position; Based on the first water flow sound correction position and the corresponding first water flow sound position, a corresponding correction parameter is obtained.

5. A method for locating a water seepage position in a house according to claim 4, characterized in that: The S7 further comprises the following steps: The second water flow sound position is corrected based on the correction parameter to obtain a new second water flow sound position.

6. A method for locating a water seepage position in a house according to claim 4, characterized in that: The method further comprises the following steps: Determine whether the first water flow sound correction position has a portion beyond the water pipe structure diagram; If yes, then short-time Fourier transform is performed on the first water flow sound data to obtain a frequency spectrum of the first water flow sound data; Based on the first water flow sound data spectrum diagram, obtaining the distribution of the first water flow sound data at each time point and each frequency; Based on the distribution of the first water flow sound data at each time point and each frequency, the abnormal frequency is screened out, and the first water flow sound data corresponding to the abnormal frequency is obtained and marked as the first abnormal water flow sound data; Based on the first abnormal water flow sound data and the correction parameter, the position of the first abnormal water flow sound data is calculated to obtain the first abnormal water flow sound position.

7. A house water seepage location positioning system, used to execute a house water seepage location positioning method according to any one of claims 1 to 6, characterized in that: It includes ultrasonic sensor, house model building module, detection and adjustment module, water flow sound data positioning module, and abnormality judgment module; There are multiple ultrasonic sensors, which are placed in an array, and the angles and distances between the ultrasonic sensors are known; The house model building module is used to build a house structure diagram based on the ultrasonic wave emitted by the ultrasonic sensor to detect the house and the corresponding reflected wave; The detection adjustment module is used to adjust the ultrasonic frequency emitted by the ultrasonic sensor when the house model construction module constructs the house structure diagram based on the ultrasonic sensor; The water flow sound data positioning module is used to pick up water flow sound data based on an ultrasonic sensor and locate the sound source position of the water flow sound data; The abnormality judgment module is used to mark the water pipe structure diagram in the house structure diagram based on the detection and adjustment module and the water flow sound data positioning module; The abnormality judgment module is also used to judge whether the sound source position of the water flow sound data is abnormal based on the relationship between the sound source position of the water flow sound data and the water pipe structure diagram, and mark the abnormal sound source position of the water flow sound data when it is abnormal, and mark the abnormal water pipe position according to the sound source position of the abnormal water flow sound data.

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