KR102185163B1 - Apparatus and method for reducing interlayer noise - Google Patents

Abstract

The present invention relates to an inter-floor noise prevention apparatus and method, and more particularly, by self-measurement of noise generated in a user's space among common buildings to reduce or restrain the noise by itself. It relates to a device and method for preventing inter-floor noise. According to an embodiment of the present invention, since a vibration measuring unit is installed on the upper part of the floor slab to predict the noise transmitted to the lower part to monitor the vibration level, it is possible to induce a reduction or reduction in noise generation by notifying when a noise occurs.

Description

Floor noise prevention device and method {APPARATUS AND METHOD FOR REDUCING INTERLAYER NOISE}

The present invention relates to an inter-floor noise prevention apparatus and method, and more particularly, self-measurement of noise generated in a space used by a resident of an apartment house and providing the degree of noise transmitted to lower households, so that noise can be reduced or controlled by itself. It relates to an apparatus and method for preventing inter-floor noise to be made.

With the spread and generalization of many apartment houses, the problem of inter-floor noise continues to emerge. Most apartment houses in Korea have an ondol floor structure that does not block floor impact sound except for the insulation layer, and does not use a separate noise barrier material other than foamed polystyrene, so the noise reduction effect is insufficient.

In order to solve this problem, construction companies are attempting to increase the thickness of the floor slab between generations or change the structure and material of the insulation buffer that can absorb intercalation noise and vibration, but it induces an increase in building load and construction cost. There is a side. In addition, in the case of new buildings, there is a way to reduce inter-floor noise in the construction stage even if there is an increase in cost, but in the case of existing buildings, it is not easy to solve the problem of inter-floor noise. The method of installing a noise measurement device in an existing building is a method of installing sensors in lower households and monitoring them in management offices or upper households, which may cause a more sensitive situation between households due to personal information leakage.

Background art of the present invention is disclosed in Korean Patent Registration No. 10-1307172.

The present invention provides an inter-floor noise prevention apparatus and method that can be installed in a building in which construction is completed.

The present invention estimates the noise transmitted to the lower household by measuring the vibration generated by the household with the inter-floor noise prevention device, and provides the information to induce to reduce the inter-floor noise, thereby reducing disputes due to inter-floor noise. It provides an interlayer noise prevention apparatus and method.

According to an aspect of the present invention, there is provided an interlayer noise prevention device.

The interfloor noise prevention apparatus according to an embodiment of the present invention may include a vibration measurement unit that measures vibration, a noise management unit that predicts a noise level by vibration, and a communication unit that enables communication between the vibration measurement unit and the noise management unit.

According to another aspect of the present invention, there is provided a computer-readable recording medium in which a method for preventing interfloor noise and a computer program for executing the same is recorded.

A method and a recording medium according to an embodiment of the present invention include measuring a vibration level with a vibration sensor installed on a floor slab to measure vertical vibration, storing vibration level data, and a preset warning alarm reference value. Comparing the vibration level may include displaying an alarm for the occurrence of noise.

According to an embodiment of the present invention, the inter-floor noise prevention device can be installed at low cost even in buildings such as apartment houses where construction has been completed, thereby preventing noise.

In addition, according to an embodiment of the present invention, if a noise measurement device installed in a lower generation malfunctions or breaks down, cooperation of the lower generation is required for repair, but if the noise measurement sensor is in the user's space, it is in another person's space. It is easier to repair and manage.

In addition, according to an embodiment of the present invention, it is not in the form of requesting civil complaints from the lower generations to the upper generations that caused inter-floor noise, but the upper generations can self-control or manage themselves, thereby helping to resolve disputes between neighbors.

1 to 5 are views illustrating an interlayer noise prevention apparatus according to an embodiment of the present invention.
6 to 8 are views for explaining the effectiveness of the vibration sensor of the inter-floor noise prevention apparatus according to an embodiment of the present invention.
9 and 10 are diagrams for explaining a correlation between vibration and noise of the inter-floor noise prevention apparatus according to an embodiment of the present invention.
11 is a view for explaining a method of measuring inter-floor noise according to an embodiment of the present invention.

In the present invention, various changes may be made and various embodiments may be provided. Specific embodiments are illustrated in the drawings and will be described through detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, the singular expressions used in the specification and claims are to be construed as meaning “one or more” in general, unless otherwise stated.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are assigned the same reference numbers, and redundant descriptions thereof will be omitted. To

1 to 5 are views illustrating an interlayer noise prevention apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the inter-floor noise prevention apparatus 10 installs a vibration sensor on the slab of the floor of an apartment house, calculates the inter-floor noise from the measured vibration data, and generates a notification. The interfloor noise prevention apparatus 10 measures the vibration of the upper generation by using the conversion of the solid transmitted sound caused by the impact generated in the upper generation into the air transmission sound to the lower generation to predict the noise of the lower generation. The inter-floor noise prevention device 10 measures the shock and vibration generated in the user's space, so management and maintenance are simple. For example, if a noise measuring device installed in a lower household malfunctions or breaks down, cooperation from the lower household is required, but if the noise measuring sensor is in the user's space, it is easier to repair and manage than if it is in someone else's space. In addition, since the interfloor noise prevention device 10 can continuously monitor the vibration level, it is possible to add a security function by setting it to operate against minute vibrations when the user is absent. On the contrary, if the vibration is not measured, an alarm is generated, and the elderly especially live alone. It can also be used as an elderly protection device.

Referring to FIG. 2, the interlayer noise prevention apparatus 10 includes a vibration measuring unit 100, a noise management unit 200 and a communication unit 300.

The vibration measuring unit 100 detects and measures vibration. The vibration measuring unit 100 installs a vibration sensor and collects data in order to accurately measure the floor vibration transmitted to the lower generation. The vibration sensor is installed at a right angle to the slab and measures the vibration value in a vertical direction (Z axis) perpendicular to the floor. For example, the vibration sensor may use a piezoelectric sensor as a 3-axis acceleration sensor. The floor of an apartment house is generally composed of a floor finishing material, a finishing mortar layer, aerated concrete, a cushioning material and a floor slab, and a vibration sensor can be attached to the floor slab and installed vertically.

3, the inter-floor noise prevention apparatus 10 according to an embodiment of the present invention installs the vibration measuring unit 100 on the floor slab (lowest layer), so the vibration measured by the floor finishing material (the uppermost layer) is very It has a different shape. The vibration measured by the vibration sensor on the upper part of the floor finish is excessively larger than the vibration of the lower part of the floor slab (lower-generation ceiling) that is actually propagated in the form of noise to lower households. Referring to FIG. 3 in detail, it can be seen that the vibration acceleration value measured on the floor finish material and the vibration acceleration value measured on the floor slab for the same impact vibration are completely different.

4 and 5, as a result of measuring the frequency response function (FRF) using an impact hammer to which a constant impact is applied at all frequencies, the vibration level on the upper floor of the upper generation and the ceiling of the lower generation The vibration level of the lower surface of the upper generation floor slab corresponding to is measured differently. The frequency response function represents the response output in a frequency relationship in a steady state when a sinusoidal input is applied to a signal transmission element. That is, as a function representing the relationship between the input signal and the output signal in the frequency domain, the magnitude of the frequency response function of the sound pressure or acceleration to the impact force input signal is expressed as the ratio of the measured value and the impact force (Pa/N) for each frequency. It is very useful for analyzing vibration characteristics such as natural frequency and damping of structures. Through the frequency response function, it can be confirmed that the impact force at the top of the floor finishing material is excessive compared to the vibration at the actual lower generation ceiling (under the floor slab). In particular, in the case of the heavy impact sound, which is the main cause of interfloor noise in apartment houses, in the low frequency band (24Hz, etc.), which is the main frequency band, the floor finish does not represent the natural frequency of the floor slab. In the interfloor noise, vibrations from the top of the floor slab of the upper generation are changed from solid transmission sound to the air transmission sound through the bottom of the floor slab of the upper generation, which is the ceiling of the lower generation, and transmitted to the lower generation. Therefore, the value measured from the floor slab of the upper generation, which is the ceiling of the lower generation, clearly measures the natural frequency of the floor slab in the low frequency band. Therefore, measuring the vibration of the upper part of the floor slab is effective in measuring the inter-floor noise that affects the lower generation. to be. That is, in order to accurately measure the floor noise of the upper household transmitted to the lower household, a vertical vibration sensor must be installed by directly contacting the floor slab. The inter-floor noise prevention device 10 predicts noise of lower households by installing the vibration measuring unit 100 directly in the upper household that causes noise, so that disputes over noise between upper and lower households can be prevented. In addition, since it can be managed within a single household, there is no need to share information with other households, and even in the event of a malfunction or failure of the vibration measuring unit 100, it can be solved without hassle within the household.

6 to 8 are views for explaining the effectiveness of the vibration measurement unit 100 of the inter-floor noise prevention apparatus 10 according to an embodiment of the present invention.

FIG. 6 is a photograph of a validity test of the vibration measurement unit 100 of the inter-floor noise prevention apparatus 10 according to an exemplary embodiment of the present invention. Referring to FIG. 6, 63 points (9*7) in a grid shape are selected on a living room-sized floor plate, and the vibration acceleration level is measured using a frequency response function.

Referring to FIG. 7, the floor slab of the concrete point (corner point) on the lower side of the wall where the average value of 63 points in a grid shape and the vibration measuring unit 100 of the inter-floor noise prevention device 10 can be installed on the floor plate of the living room size. As a result of comparing the vibration acceleration level, the natural frequency and the vibration shape are similar. Therefore, it can be seen that the inter-floor noise prevention device 10 installed at the concrete point on the lower side of the wall is effective in measuring the floor impact vibration of the upper household transmitted to the lower household. For example, the inter-floor noise prevention device 10 may be installed in direct contact with a floor slab under a kitchen furniture or a wall pad, which is a concrete point on the lower side of the wall. This is a place where apartment houses can be installed even after construction is completed. In addition, since it is installed in the user's space, not in the space of the lower generation, that is, others, it is easy to manage and maintain.

Referring to FIG. 8, when the measured vibration level exceeds a preset threshold, the vibration measurement unit 100 recognizes it as noise. The vibration measurement unit 100 determines a noise level based on vibration level data collected through vibration level amplification and filtering. For example, the vibration measuring unit 100 measures vibration at intervals of 0.2 to 2 seconds. The vibration measurement unit 100 may transmit noise generation vibration level data to the noise management unit 200 at a time point of 5 seconds when vibration that can be recognized as noise occurs three or more times for 5 seconds. The vibration measurement unit 100 preprocesses the value measured by the vibration sensor and transmits the preprocessed value to the noise management unit 200. The preprocessing process uses an amplifier and filter. The vibration measurement unit 100 passes the vibration level data through a non-inverting amplifier. In this case, if amplification is performed a lot, noise is amplified and recognized as noise. The vibration measurement unit 100 passes the amplified value through a high pass filter to remove noise. The high pass filter passes a high frequency signal recognized as noise and removes the vibration ski slope phenomenon, which is an electrical abnormal signal in the low frequency band.

The noise management unit 200 determines whether there is noise based on the noise generation vibration level data transmitted from the vibration measurement unit 100 and generates a warning alarm. The noise management unit 200 may be performed in various information communication devices such as a home network (eg, a device capable of processing information such as a wall pad, a PC, a mobile phone, a web pad, etc. and capable of communicating). For example, the noise management unit 200 may manage data measured by the vibration measurement unit 100 as a wall pad by a single wall pad system built into the wall pad in the household.

The noise management unit 200 includes a setting unit 210, an alarm unit 220 and a storage unit 230.

The setting unit 210 presets a warning notification reference value for noise warning notification based on the vibration level data. As for the warning notification reference value, the first threshold is the noise threshold, the second threshold is a predetermined time to determine the continuation of the noise, and the third threshold can be set as the number of noise occurrences, and other thresholds are added. can do. The warning alarm threshold includes one or more of the threshold values. For example, the setting unit 210 may set a noise warning alarm by monitoring the number of issuances within a predetermined time range so as to give a notification warning when the vibration occurs repeatedly for a predetermined time.

The setting unit 210 provides a standard level of inter-floor noise that the residents agree with by referring to the legal standards for inter-floor noise in the apartment house. The interlayer noise reference value calculated by comparing the vibration level and the noise level will be described in detail with reference to FIGS. 8 and 9. The setting unit 210 may set the inter-floor noise reference value as a first threshold value, or change and set the warning alarm reference value by referring to the reference value according to individual sensitivity. In addition, the setting unit 210 may set different warning alarm threshold values for day and night. For example, the setting unit 210 may set a first threshold value and a second threshold value to request a warning alarm from the alarm unit 220 in the case of noise that continues for a predetermined time above the threshold value. In addition, the setting unit 210 may set a third threshold value, check the number of occurrences for a predetermined time, and request a noise caution alarm from the alarm unit 220 when the warning alarm reference value is exceeded.

The alarm unit 220 alerts when the vibration level data exceeds the warning notification reference value according to the set warning notification reference value. The alarm unit 220 may perform an alarm warning as a visual screen or an alarm sound.

The storage unit 230 stores vibration level data. The storage unit 230 may store vibration level data in a text format. The storage unit 230 may provide the stored data as raw data for creating a noise generation report.

The communication unit 300 may connect the vibration measurement unit 100 and the noise management unit 200 with various wired and wireless communication standards and technologies available, and may connect the interfloor noise prevention device 10 and various information communication devices. For example, the inter-floor noise prevention device 10 can add a management office transmission system using the communication unit 300, so that inter-floor noise prevention devices located in each household in the apartment building can be remotely managed in a centralized manner.

9 and 10 are diagrams for explaining a correlation between vibration and noise.

9 is a graph showing values obtained by measuring the vibration level and the noise level for the same impact by the vibration sensor and the noise sensor. It is difficult to measure only the floor impact sound as actual noise in measuring the noise level inside the apartment house because various living noises (TV, road traffic noise, washing machine, etc.) are generated. Therefore, it is necessary to predict the noise level of the lower generation through the vibration level of the floor slab of the upper generation.

Referring to FIG. 10, the relationship between slab vibration and noise caused by various shock sources (standard shock source, adult walking, etc.) can be confirmed in Equation 1 below.

Here, X represents the slab vibration level (unit m/s^2), and Y represents the noise level (dB(A)).

Using Equation 1, it is possible to predict whether the vibration level of the upper generation is converted to the noise level of the lower generation based on statistical data that converts the slab vibration and noise by various shock sources (standard shock source, adult walking, etc.) Do. In addition, according to the present invention, by predicting the noise level based on the noise level conversion predicted value of the vibration level, it is possible to extract an interlayer noise reference value of a vibration level that can be recognized as noise.

11 is a diagram illustrating a method of measuring interfloor noise according to an embodiment of the present invention.

Referring to FIG. 11, the interfloor noise prevention apparatus 10 measures vibration in a vibration measuring unit 100 installed in the household in step S1110. The vibration measuring unit 100 is a vibration sensor capable of measuring a floor impact sound in a vertical direction, and is installed on a floor slab under a kitchen furniture or wall pad.

In step S1120, the inter-floor noise prevention apparatus 10 stores a part recognized as noise from the measured vibration level data in a data format. For example, the inter-floor noise prevention device 10 transmits to the noise management unit 200 that the noise is generated at the time of 5 seconds when the inter-floor noise occurs three or more times within 5 seconds, and the noise management unit 200 is Save the data.

In step S1130, the inter-floor noise measurement device 10 compares a preset warning alarm reference value and, when it is determined as noise, generates a noise warning alarm. The interfloor noise measuring apparatus 10 may set a plurality of threshold values as a warning alarm reference value as various conditions, and may be set differently for day, night, and household. For example, the first threshold value is a noise threshold value, and a vibration level corresponding to the noise level may be determined as noise when it exceeds the first threshold value. The second threshold value is a predetermined time during which the noise continues, and when noise exceeding the first threshold value continuously exceeds the second threshold value, a noise generation warning alarm may be generated. In addition, the third threshold is the number of times that noise generated during the second threshold is generated, and when noise is generated while exceeding the third threshold during the second threshold, a noise warning alarm may be generated. The inter-floor noise prevention apparatus 10 may set a noise warning alarm for a vibration level as a screen of an information communication device or a warning sound. The inter-floor noise prevention apparatus 10 may induce an action of reducing noise by recognizing noise generation by generating a noise generation warning alarm.

The interfloor noise prevention method can correct the vibration level of the sensor using fuzzy theory, which is a mathematical approach that judges ambiguous and ambiguous problems, not binary logic. For example, the interfloor noise prevention method can utilize a function of having a reference sound source in the center of the living room and automatically correcting the level by recognizing it by a sensor.

The interfloor noise prevention method may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. Program instructions recorded on a computer-readable medium may be specially designed and configured for the present invention, or may be known to and usable by those skilled in the computer software field. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes magneto-optical media and hardware devices specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Further, the above-described medium may be a transmission medium such as an optical or metal wire, a waveguide including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The above-described hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

So far, the present invention has been looked at around the embodiments. Those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

10: interfloor noise prevention device
100: vibration measuring unit
200: noise management unit
210: setting unit
220: alarm unit
230: storage unit
300: communication department

Claims (9)

In the interlayer noise prevention device,
A vibration measuring unit that measures vibration;
A noise management unit predicting a noise level based on the vibration; And
Including a communication unit to enable communication of the vibration measurement unit and the noise management unit,
The noise management unit
It is characterized in that the noise level of the lower generation is predicted by the vibration level of the upper generation and a noise warning alarm is given to the upper generation.
The vibration measuring unit
It includes a vibration sensor in a vertical direction,
It is characterized in that it is located on the top of the floor slab,
The vibration sensor is installed in direct contact with the upper part of the floor slab under the kitchen furniture or under the wall pad, which is a concrete point on the lower side of the wall,
After amplifying the vibration level data through a non-inverting amplifier, noise is removed using a high pass filter,
The noise management unit
A setting unit for setting a warning alarm reference value;
An alarm unit for generating a caution alarm when the warning alarm reference value is higher; And
Includes a storage unit for storing vibration level data,
The warning alarm threshold is
It characterized in that it comprises at least one of a first threshold, a second threshold and a third threshold,
The warning alarm reference value sets day and night separately,
The first threshold is set according to an individual's sensitivity with reference to an interlayer noise reference value or an interlayer noise reference value,
The second threshold is set to a predetermined time to determine the continuation of noise,
The third threshold value is the number of noise issuances,
The inter-floor noise reference value predicts the noise level corresponding to the vibration level based on Equation 1 below, and the vibration level data that can be recognized as noise or the vibration level corresponding to the noise level according to the legal standard for interfloor noise in apartment houses Floor noise prevention devices that provide data.
[Equation 1]
Y=227.07X+39.487
X stands for slab vibration level (unit m/s^2), and Y stands for noise level (dB(A)).
delete delete delete delete delete delete In the interfloor noise prevention method,
Measuring a vibration level with a vibration measuring unit that measures vertical vibration installed on the upper part of the floor slab;
Storing data of the vibration level; And
Comprising the step of comparing a preset warning alarm reference value and the vibration level to display a noise occurrence caution alarm,
The vibration measuring unit is installed in direct contact with the upper part of the floor slab under the kitchen furniture or under the wall pad, which is a concrete point on the lower side of the wall,
After amplifying the vibration level data through a non-inverting amplifier, noise is removed using a high pass filter,
The warning alarm threshold is
It characterized in that it comprises at least one of a first threshold, a second threshold and a third threshold,
The warning alarm reference value sets day and night separately,
The first threshold value may be set according to an individual's sensitivity with reference to an inter-floor noise reference value or an inter-floor noise reference value,
The second threshold is set to a predetermined time to determine the continuation of noise,
The third threshold value is the number of noise issuances,
The inter-floor noise reference value predicts the noise level corresponding to the vibration level based on Equation 1 below, and the vibration level data that can be recognized as noise or the vibration level corresponding to the noise level according to the legal standard for interfloor noise in apartment houses How to prevent noise between floors to provide data.
[Equation 1]
Y=227.07X+39.487
X stands for slab vibration level (unit m/s^2), and Y stands for noise level (dB(A)).
A computer program recorded on a computer-readable recording medium that executes the interfloor noise prevention method of claim 8.

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