System for monitoring interlayer noise

Abstract

The present invention relates to an inter-floor noise monitoring system, comprising: an inter-floor noise sensing module installed within each unit of a multi-unit dwelling to measure inter-floor noise within the unit, including noise and vibration, in real time; a time synchronization module that synchronizes time so that each sensing data measured by the inter-floor noise sensing module is recorded at the same time; a sensing data storage module that records and stores the sensing data synchronized through the time synchronization module; a management server that calculates the location of inter-floor noise occurrence using trilateration based on the sensing data of the sensing data storage module; and a communication module that transmits the sensing data stored in the sensing data storage module to the management server, thereby providing an inter-floor noise monitoring system capable of accurately and effectively detecting and monitoring inter-floor noise.

Description

Technology Field

[0001] The present invention relates to an inter-floor noise monitoring system, and more specifically, to an inter-floor noise monitoring system capable of accurately detecting the location of inter-floor noise occurring in multi-unit housing and effectively tracking and monitoring not only temporary inter-floor noise but also simultaneous inter-floor noise. Background Technology

[0002] Recently, inter-floor noise, where noise or shock from one unit is transmitted to other units in multi-unit dwellings such as apartments and villas where multiple households reside together, has emerged as a major social problem.

[0003] Inter-floor noise is mainly caused by various daily activities, such as footsteps when residents of the upstairs unit move, friction sounds when heavy objects like furniture are dragged while in contact with the floor, impacts when objects fall to the floor, and impacts caused by children running or rolling.

[0004] When such inter-floor noise occurs, it causes serious social problems, including not only arguments between neighbors but also, in severe cases, physical threats or harm leading to casualties; therefore, thorough countermeasures are required.

[0005] Currently, as part of measures to prevent inter-floor noise, flooring materials or structures that cushion impact or absorb noise, as well as systems for monitoring inter-floor noise, are being developed.

[0006] However, since flooring materials designed to prevent inter-floor noise can only be applied to multi-unit dwellings constructed in the future, the majority of existing apartment buildings inevitably remain exposed to inter-floor noise. Furthermore, because inter-floor noise monitoring systems are limited to merely detecting the overall noise level transmitted to each unit, it is difficult to accurately identify the source of the noise, making it difficult to expect a practical solution to the inter-floor noise problem.

[0007] Furthermore, while noise or vibration may occur temporarily within a single household, it can also occur repeatedly across multiple households; however, conventional inter-floor noise monitoring systems had the problem of being unable to detect, analyze, and process such multiple noises. The problem to be solved

[0008] The present invention was devised to solve the problems of the aforementioned prior art, and aims to provide an inter-floor noise monitoring system capable of accurately monitoring the locations of both temporary and simultaneous inter-floor noise in real time in a complex noise environment of multi-unit housing. means of solving the problem

[0009] As a means to solve the aforementioned technical problem,

[0010] The present invention provides an inter-floor noise monitoring system comprising: an inter-floor noise sensing module installed in each unit of a multi-unit dwelling to measure inter-floor noise within the unit, including noise and vibration, in real time; a time synchronization module that synchronizes time so that each sensing data measured by the inter-floor noise sensing module is recorded at the same time; a sensing data storage module that records and stores the sensing data synchronized through the time synchronization module; a management server that calculates the location of inter-floor noise occurrence using trilateration based on the sensing data of the sensing data storage module; and a communication module that transmits the sensing data stored in the sensing data storage module to the management server.

[0011] In this case, the inter-floor noise sensing module includes a noise sensor installed on the ceiling of each household and a vibration sensor installed on a slab located above the ceiling, wherein the noise sensor is embedded in an opening of the ceiling using a detachable means, and the detachable means may include a hook that is inserted in a compressed state into the opening and then elastically unfolds to be supported in a state draped over the ceiling.

[0012] In this case, the inter-floor noise monitoring system may further include a connecting rod, one end of which is fixed to the detachable means and the other end of which has the vibration sensor attached, and which non-adhesively fixes the vibration sensor to the slab through length adjustment.

[0013] In this case, the time synchronization module can record sensing data including time information when inter-floor noise reached the inter-floor noise sensing module by tagging it with a time stamp.

[0014] In this case, the time synchronization module can synchronize the recording time of the sensing data through one or more selected from GPS, NTP, SNTP, PTP, Berkeley Algorithm, and proprietary protocols.

[0015] In this case, the management server can analyze and distinguish the differences in frequency, arrival time, location of occurrence, and intensity of the noise or vibration based on the collected sensing data when complex noise occurs.

[0016] In this case, the analysis of the frequency, arrival time, location of occurrence, and intensity difference of the above noise or vibration can be performed by an artificial intelligence-based inter-floor noise analysis module.

[0017] In this case, the above management server may be a cloud platform server.

[0018] In this case, the inter-floor noise monitoring system may further include an LED indicator installed in each household that visually displays the level of inter-floor noise using colors or flashing patterns. Effects of the invention

[0019] According to the present invention, the location of the inter-floor noise source can be accurately identified because the inter-floor noise is measured using a sensor, the distance between the inter-floor noise source and the sensor is calculated, and the location of the inter-floor noise generation is derived through trilateration.

[0020] In addition, by using artificial intelligence to analyze the type and location of inter-floor noise based on the frequency of noise and vibration, signal arrival time, trilateration results, and signal intensity using collected sensing data, simultaneous inter-floor noise can also be effectively separated and detected.

[0021] In addition, the sensor can be easily attached to the ceiling using a detachable mechanism, and the intensity of inter-floor noise transmitted to each household can be easily identified through an LED indicator, providing convenience in installation and use.

[0022] In addition, due to the aforementioned effects, it can contribute to minimizing disputes related to inter-floor noise occurring in multi-unit housing. Brief explanation of the drawing

[0023] FIG. 1 is a block diagram of an inter-floor noise monitoring system according to a preferred embodiment of the present invention, FIG. 2 is a schematic diagram showing the state in which the inter-floor noise monitoring system of FIG. 1 is applied to a multi-unit dwelling. FIG. 3 is a diagram showing the unfolded view and installation state of a sound collecting plate applicable to a noise sensor. Specific details for implementing the invention

[0024] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are described using similar reference numerals.

[0026] FIG. 1 is a block diagram of an inter-floor noise monitoring system according to a preferred embodiment of the present invention, FIG. 2 is a schematic diagram showing the state in which the inter-floor noise monitoring system of FIG. 1 is applied to a multi-unit dwelling, and FIG. 3 is a diagram showing an unfolded view and installation state of a sound collecting plate applicable to a noise sensor.

[0028] Referring to FIGS. 1 to 3, a floor noise monitoring system (100) according to a preferred embodiment of the present invention includes a floor noise sensing module (110), a time synchronization module (120), a sensing data storage module (130), a management server (140), and a communication module (150).

[0030] The inter-floor noise sensing module (110) is installed in each unit of the multi-unit dwelling (10) to measure inter-floor noise generated in the multi-unit dwelling (10). For reference, in this embodiment, inter-floor noise is used to include noise transmitted through the air from adjacent units and vibrations transmitted through floors or walls.

[0031] Specifically, the inter-floor noise sensing module (110) includes a noise sensor (111) and a vibration sensor (112).

[0032] The noise sensor (111) is a microphone-based sensor installed on the ceiling (C) of each household to detect noise transmitted from adjacent households in real time, and converts the vibration of the detected noise into an electrical signal to precisely measure the intensity and frequency of the noise. In this case, it goes without saying that an amplifier and a digital converter may be provided together to amplify minute noise to a certain level and convert the amplified analog noise measurement value into digital data.

[0033] Meanwhile, the noise sensor (111) can be installed and removed from the ceiling (C) using a detachable means.

[0034] The detachable means includes a main body (113) on which a noise sensor (111) is installed, and a pair of locking members (114) provided on the outer surface of the main body (113) so as to face outward along the diameter direction of the main body (113). In this case, the locking member (114) is configured such that one end is hinge-coupled to the top of the main body (113) using a spring, thereby allowing the other end to rotate elastically.

[0035] Therefore, when the main body (113) with the noise sensor (111) installed is inserted into the opening (O) of the ceiling (C), the catch (114) is pressed against the edge of the opening (O) and compressed against the main body (113). After the main body (113) passes through the opening (O), it is restored to its original state by elastic force, thereby allowing the catch (114) to be supported in a position where it is hanging on the ceiling (C). Conversely, if the installation is to be removed for maintenance of the noise sensor (111), the main body (113) can be raised further into the space between the ceiling (C) and the slab (S), and then the catch (114) can be compressed and lowered to smoothly separate it from the ceiling (C).

[0036] Here, the noise sensor (111) is described as being attached to a separate detachable means, but it is also possible for the detachable means and the noise sensor (111) to be formed as a single unit to further improve the convenience of installation and use.

[0037] In the case of the noise sensor (111), it measures noise propagating into the space between the ceiling (C) and the slab (S), so it may include a sound collecting plate (115) (see FIG. 3) to more effectively capture the noise.

[0038] The sound collecting plate (115) includes a body (115a), a first wire (115b), and a second wire (115c).

[0039] The body (115a) has a plate-like donut shape with one end and the other end overlapping in the unfolded state (see FIG. 3 (a)), and in the installed state, it has a cone shape truncated by the first wire (115b) and the second wire (115c) (see FIG. 3 (b)) so as to effectively collect sound transmitted through the air.

[0040] The body (115a) may be made of a flexible material, such as cloth or synthetic resin, for ease of installation of the sound collecting plate (115), and preferably made of silicone material that can maximize sound collecting performance by minimizing the reflection of noise.

[0041] The first wire (115b) is formed into a ring shape using an elastic metal or plastic material and attached to the inner circumference of the body (115a). In the case of the first wire (115b), only one end is fixed to the main body (113), so the other end, excluding the fixed part, is configured to be variable.

[0042] The second wire (115c) is made of the same material and shape as the first wire (115b), but has a larger diameter than the first wire (115b) and is attached to the outer periphery of the body (115a).

[0043] Accordingly, the body (115a), the first wire (115b), and the second wire (115c) are connected to each other and operate as a single unit. Specifically, one end of the sound collecting plate (115) remains fixed to the main body (113) by the fixing part of the first wire (115b), and the other end, excluding the fixed part, overlaps with the one end along the circumferential direction and can be varied within a predetermined range.

[0044] As a result, when installing the noise sensor (111), if the other end of the sound collecting plate (115) is slid and rolled up, the upper diameter of the sound collecting plate (115) is reduced to the same size as the lower diameter, becoming cylindrical, and thus can be easily inserted into the opening (O) of the ceiling (C). When insertion is complete, the other end of the sound collecting plate (115) slides in the opposite direction and unfolds due to the elastic restoring force of the first wire (115b) and the second wire (115c), and can be restored to its original truncated cone shape.

[0045] The angle of inclination of the sound collecting plate (115) with respect to the ceiling (C) can be adjusted by taking into account the gap between the ceiling (C) and the slab (S). For example, if the gap between the ceiling (C) and the slab (S) is narrow, the sound collecting plate (115) can be spread out to be more expanded, and if the gap between the ceiling (C) and the slab (S) is wide, the sound collecting plate (115) can be set to be gathered to be relatively reduced. However, the reduction range of the sound collecting plate (115) is limited to an extent that does not impair the sound collection performance of the noise sensor (111), and the degree of spread of the sound collecting plate (115) can be adjusted by increasing or decreasing the width of the body (115a) and the length of the second wire (115c).

[0047] The vibration sensor (112) is attached above the noise sensor (111), that is, to the floor slab (S) of the upper floor unit, and precisely measures structural vibrations transmitted through the floor or wall of the apartment building (10) in real time.

[0048] In the case of the vibration sensor (112), it may be considered to be directly attached to the slab (S) using adhesive, but the adhesive installation method has the disadvantage that it is difficult to separate the vibration sensor (112) from the slab (S) during maintenance and repair.

[0049] To solve the problem of the adhesive installation method, the vibration sensor (112) can be installed using a connecting rod (116).

[0050] To explain in detail, the connecting rod (116) is configured to be adjustable in length, and is fixed to the main body (113) of the detachable means at one end, and a vibration sensor (112) is attached to the other end. Therefore, when installing the noise sensor (111), the length of the connecting rod (116) is adjusted by considering the gap between the ceiling (C) and the slab (S), and after attaching the vibration sensor (112) to the other end of the connecting rod (116), the main body (113) is inserted into the opening (O) of the ceiling (C), so that the vibration sensor (112) can be fixed to the slab (S) in a non-adhesive manner, and thus, when maintenance is required, the vibration sensor (112) can be easily separated by simply removing the main body (113).

[0051] Here, the method of adjusting the length of the connecting rod (116) is not particularly limited and various methods may be applied. For example, the length may be adjusted by connecting the second cylindrical tube to the first cylindrical tube by screw coupling and rotating the second cylindrical tube relative to the first cylindrical tube, or by inserting the second cylindrical tube into the inside of the first cylindrical tube, adjusting the length, and then tightening the overlapping portion of the first cylindrical tube and the second cylindrical tube with a clamp.

[0052] In addition, it is possible to insert a second cylindrical tube into the inside of a first cylindrical tube having multiple holes formed at regular intervals along the longitudinal direction, and to insert a locking member provided in the second cylindrical tube into the hole of the first cylindrical tube, but this method has the disadvantage that it is difficult to finely adjust the length of the connecting rod (116) compared to the screw coupling method or the clamp fixing method.

[0053] Meanwhile, it is preferable to use a lightweight material such as aluminum or synthetic resin for the connecting rod (116) considering the elastic support of the catch (114).

[0055] The time synchronization module (120) is for synchronizing the time of the inter-floor noise sensing module (110) installed in each household, and synchronizes the recording time of noise and vibration data collected through the noise sensor (111) and vibration sensor (112) using GPS, NTP (Network Time Protocol), SNTP (Simple Network Time Protocol), PTP (Precision Time Protocol), Berkeley Algorithm, proprietary protocol, etc.

[0056] Specifically, since the noise sensor (111) and the vibration sensor (112) have different sensing cycles and different set times, time synchronization is required to express the information collected by multiple sensors in a single time period. For example, if the noise sensor (111) detects noise every 10 seconds starting from 8:20:00 PM and the vibration sensor (112) detects vibration every 5 seconds starting from 8:20:00 PM, then through time synchronization, the data from the noise sensor (111) at 8:20:10 PM and the data from the vibration sensor (112) at 8:20:10 PM can be expressed in the same time period, and the data from the vibration sensor (112) at 8:20:05 PM and 8:20:15 PM can be expressed in different time periods.

[0057] Meanwhile, the time synchronization module (120) can ensure accuracy during data analysis by tagging and recording sensing data containing information on the time when the inter-floor noise reached the inter-floor noise sensing module (110), that is, the time when the noise sensor (111) and the vibration sensor (112) detected the noise and vibration, with a time stamp.

[0059] The sensing data storage module (130) is synchronized through the time synchronization module (120) and records and stores the sensing data tagged with a time stamp in real time.

[0061] The management server (140) calculates, analyzes, and manages the location of inter-floor noise based on the sensing data received from the sensing data storage module (130) by the communication module (150).

[0062] The location of the inter-floor noise is calculated by estimating the distance between the inter-floor noise source and the sensors (111) (112) that detected the inter-floor noise using the Time of Arrival (TOA) and the propagation speed of the noise within the medium, and then using a trilateration method.

[0063] To explain in more detail, the distance between the inter-floor noise source and the sensors (111) (112) that detect the inter-floor noise is calculated using the following [Equation 1].

[0065] [Equation 1]

[0066] d = v × Δtd

[0068] Here, d is the distance between the inter-floor noise source and the sensor, v is the propagation speed of inter-floor noise within the medium, where the speed of sound in air is 343 m / s and the vibration speed in concrete is 3000 m / s, and Δtd is the time taken for the sensor to detect inter-floor noise after the synchronized time, and the sensor's inter-floor noise detection time uses sensing data tagged with the time stamp described above.

[0069] Once the distance (d) is calculated using [Equation 1], the location of the inter-floor noise source is detected using the trilateration method. To use the trilateration method, at least three sensors must have collected inter-floor noise information; here, the explanation assumes a situation where three sensors detect inter-floor noise.

[0070] According to the trilateration method, circles are drawn with a radius of distance (d) centered on each of the three sensors that detected the inter-floor noise, and the point where the three circles intersect is estimated as the location of the inter-floor noise source.

[0071] For example, if three sensors a, b, and c in Figure 2 detect inter-floor noise, and the distance from sensor a to the inter-floor noise source is calculated to be 2m, the distance from sensor b to the inter-floor noise source is 3m, and the distance from sensor c to the inter-floor noise source is 1m according to [Equation 1], then when circles with radii of 2m, 3m, and 1m are drawn centering sensors a, b, and c, respectively, the point where the three circles intersect—that is, the third unit on the third floor—can be estimated as the inter-floor noise source. In this case, the Least Squares Method can be used to correct measurement errors between sensors and to calculate a more accurate location.

[0073] However, noise can occur simultaneously in multi-unit dwellings, and in cases where separation of multiple noises or complex noise occurs, it is necessary to process each noise separately.

[0074] In this invention, when multiple noises occur, the frequency, arrival time, location of occurrence, and intensity differences of noise and vibration are analyzed and distinguished based on sensing data.

[0075] Frequency analysis converts noise or vibration data collected from each sensor into the frequency domain using a Fourier Transform, and identifies each noise source by separating noises with different frequency ranges. For example, the sound of children running can be classified as low-frequency noise, while the sound of an object falling can be classified as high-frequency noise.

[0076] In the case of Time Difference Analysis, multiple noises occurring at the same time are separated by analyzing the time difference and signal patterns of noise or vibration reaching each sensor. For example, noise occurring simultaneously on the second and third floors can be distinguished based on the arrival time and frequency difference of the noise.

[0077] Spatial separation distinguishes and separates noise originating from different locations by comparing and analyzing the trilateration results and signal strengths by floor. For example, if a strong signal is detected by the vibration sensor on the second floor and a weak signal is detected by the vibration sensor on the third floor, the noise can be identified as originating from the third floor.

[0078] Signal Strength Analysis estimates major noise sources by comparing signal strengths for each sensor. During signal strength analysis, strong signals are analyzed first, and then weak signals can be further separated.

[0079] The frequency analysis, time difference analysis, spatial analysis, and signal strength analysis of the aforementioned sensing data can be performed using artificial intelligence technology.

[0080] Specifically, the management server (140) may include an artificial intelligence-based inter-floor noise analysis module, and the frequency, signal arrival time, trilateration result, and data on the type and location of inter-floor noise according to signal strength are assigned to a number of noise and vibration data by the inter-floor noise analysis module, and by the AI ​​learning model learning from the labeled inter-floor noise data in this way, the type and location of noise or vibration can be derived when new unlabeled inter-floor noise data is presented.

[0082] The management server (140) described above can be installed in the management room of a multi-unit dwelling, and can collect inter-floor noise information of each household in the manner described above to build a database for inter-floor noise management and display real-time monitoring information through a display. In addition, the management server (140) can be implemented in the form of a cloud-based server to build an inter-floor noise monitoring platform.

[0083] Meanwhile, if inter-floor noise of a level requiring caution or warning is detected for more than a certain period of time during the monitoring process, the management server (140) may request caution by providing information including the time of occurrence, type, intensity, etc. of the inter-floor noise to the terminal of the household head of the household.

[0085] The communication module (150) transmits the sensing data stored in the sensing data storage module (130) to the management server (140) in real time via a wired or wireless data communication network.

[0086] In this case, the sensing data is transmitted with enhanced security through encryption, and the communication network may include all types of wired and wireless networks such as 3GPP (3rd Generation Partnership Project) networks, LTE (Long Term Evolution) networks, 5G networks, WIMAX (World Interoperability for Microwave Access) networks, wired and wireless Internet, LAN (Local Area Network), Wireless LAN (Wireless Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), Bluetooth networks, Wi-Fi networks, NFC (Near Field Communication) networks, satellite broadcasting networks, analog broadcasting networks, DMB (Digital Multimedia Broadcasting) networks, etc.

[0088] Meanwhile, an LED indicator (160) may be provided to visually display the level of inter-floor noise transmitted within each household.

[0089] The LED indicator (160) is attached to the lower part of the main body (113) of the detachable means while connected to the inter-floor noise sensing module (110), and can display different colors or blink in different patterns depending on the noise or vibration intensity measured by the noise sensor (111) and the vibration sensor (112). For example, it can be displayed in white when the inter-floor noise is normal, in yellow when caution is required, and in red when a warning is required. In this case, the range of inter-floor noise corresponding to normal, caution, and warning is pre-set and stored.

[0091] Preferred embodiments of the present invention have been described in detail above with reference to the drawings. The description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Accordingly, the scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning, scope, and equivalent concepts of the claims should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0092] 10 : Multi-unit housing 100: Inter-floor noise monitoring system 110 : Inter-floor noise sensing module 111 : Noise sensor 112 : Vibration sensor 113 : Main body 114 : Hinder 115 : Sound collecting panel 115a : Body 115b : 1st wire 115c : 2nd wire 116 : Connecting rod 120 : Time synchronization module 130 : Sensing data storage module 140 : Management Server 150 : Communication module 160 : LED indicator C: Ceiling O : Ceiling opening S : Slab

Claims

Claim 1 An inter-floor noise monitoring system comprising: an inter-floor noise sensing module installed in each unit of a multi-unit dwelling to measure inter-floor noise within the unit, including noise and vibration, in real time; a time synchronization module that synchronizes time so that each sensing data measured by the inter-floor noise sensing module is recorded at the same time; a sensing data storage module that records and stores the sensing data synchronized through the time synchronization module; a management server that calculates the location of inter-floor noise occurrence using trilateration based on the sensing data of the sensing data storage module; and a communication module that transmits the sensing data stored in the sensing data storage module to the management server. Claim 2 A floor noise monitoring system according to claim 1, wherein the floor noise sensing module comprises a noise sensor installed on the ceiling of each household and a vibration sensor installed on a slab located above the ceiling, wherein the noise sensor is embedded in an opening of the ceiling using a detachable means, and the detachable means includes a hook that is inserted in a compressed state into the opening and then elastically unfolded to be supported in a state spanning the ceiling. Claim 3 A floor noise monitoring system according to paragraph 2, further comprising a connecting rod wherein one end is fixed to the detachable means and the other end has the vibration sensor attached thereto, and the vibration sensor is fixed to the slab in a non-adhesive manner through length adjustment. Claim 4 A floor noise monitoring system according to claim 1, wherein the time synchronization module records sensing data including time information when the floor noise reached the floor noise sensing module by tagging it with a time stamp. Claim 5 A floor noise monitoring system according to claim 1, wherein the time synchronization module synchronizes the recording time of sensing data through one or more selected from GPS, NTP, SNTP, PTP, Berkeley Algorithm, and proprietary protocols. Claim 6 A floor noise monitoring system according to claim 1, characterized in that the management server analyzes and distinguishes differences in frequency, arrival time, location of occurrence, and intensity of noise or vibration based on sensing data collected when complex noise occurs. Claim 7 A floor noise monitoring system according to claim 6, characterized in that the analysis of the frequency, arrival time, location of occurrence, and intensity difference of the noise or vibration is performed by an artificial intelligence-based floor noise analysis module. Claim 8 A floor noise monitoring system characterized in that, in claim 6, the management server is a cloud platform server. Claim 9 A floor noise monitoring system characterized by further including an LED indicator installed in each household to visually display the level of floor noise in a color or flashing pattern, in any one of claims 1 to 8.

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