JP3751628B2 - Noise detection system - Google Patents

Description

  The present invention measures the sound generated on the upper floor in an apartment house etc. by vibration, converts the vibration into noise on the lower floor, and prevents the noise on the upper floor from exceeding a predetermined level. Related to the technology to limit.

  In particular, in the present invention, the vibration detection sensor is installed in a place where the vibration detection sensor (vibration detection sensor) does not interfere with the activity of the upper floor resident, while the resident activity is most active. It is related with the system which can detect the noise which the resident of a lower floor receives.

  Furthermore, the present invention provides a vibration detection sensor at a location away from the location where noise is to be detected as described above, so that whether the vibration detected by the vibration detection sensor is vibration generated at the location where noise is desired to be detected or not. However, even if a vibration detection sensor is installed at a location away from the location where noise is to be detected, only the vibration generated at the location where noise is desired can be detected and converted to noise. It is related with the noise detection system which can be performed.

  In collective housing, etc., the sound from the activities of the residents on the upper floor is transmitted to the living room on the lower floor, and is received as noise by the residents on the lower floor.

  For this reason, research on sound insulation of floors of apartment houses and the like is underway.

  However, even if the sound insulation performance of the floor is improved, the noise on the upper floor will not be transmitted to the lower floor at all, so it is necessary to know the level of noise felt by the residents on the lower floor There is.

For this reason, various simulation systems for sound insulation performance of houses and the like have been proposed.
JP-A-6-230711 JP 10-31409 A

  In order to measure the noise level on the lower floor, it is conceivable to actually measure the noise by providing a microphone or the like in the lower floor room.

  However, the microphone or the like also picks up the living sound of the resident on the lower floor, which is a violation of the privacy of the resident on the lower floor.

In contrast, the applicant of the present application avoids directly detecting the noise level of the lower floor with sound, detects the generated sound of the upper floor with vibration, and estimates the value of the noise of the lower floor from the vibration. Devised.

  However, since the place where the residents on the lower floors are most likely is usually directly below the place where the residents on the upper floors are most active, in the above system devised by the applicant of the present invention, In order to estimate the noise level perceived by residents, the vibration detection sensor had to be installed in a place where residents on the upper floors were most active.

  Then, the installation of the vibration detection sensor hindered the activities of the residents on the upper floor, which was inconvenient in actual use.

  Therefore, one problem to be solved by the present invention is to detect vibrations in places that can be inspected, such as under the kitchen, under the washing pan in the dressing room, under the vanity stand, under the telephone stand, or under the closet. It is an object of the present invention to provide a noise detection system in which a sensor can be installed and a noise level of a place where noise is desired to be detected can be estimated from vibrations at a remote place.

  As described above, when a vibration detection sensor is installed in a location away from the location where noise is to be detected, vibration generated outside the location where noise is to be detected is picked up by the vibration detection sensor, and noise other than the target location is detected. It will be.

  Therefore, another problem to be solved by the present invention is to eliminate the vibration and noise generated outside the target place when the vibration detection sensor is installed in a place away from the place where the noise is desired to be detected. An object of the present invention is to provide a noise detection system capable of detecting only noise generated at a place.

The noise detection system according to the present invention includes:
A vibration detection sensor that detects the vibration of the upper floor and outputs a voltage signal corresponding to the magnitude of the vibration;
A noise conversion unit that converts the voltage of the voltage signal into a lower floor noise value and outputs it,
A noise conversion condition setting unit that has an input unit and sets a condition for conversion from the voltage to a noise value by the noise conversion unit;
A vibration noise conversion table storing a predetermined correspondence between voltage and noise indicating the magnitude of vibration by a combination of slab specifications, ceiling specifications, and various conditions of distance from the center of the slab to the vibration detection sensor;
A noise value output from the noise conversion unit is input, and a comparison circuit is provided for comparing the noise value with a predetermined threshold value. When the noise value is larger than the threshold value, a warning output command is output to the warning unit. A control unit,
A warning unit for inputting a warning output command of the control unit and outputting a warning message;
The noise conversion condition setting unit inputs slab specifications, ceiling specifications, and various conditions of the distance from the center of the slab to the vibration detection sensor via the input unit, referring to the vibration noise conversion table, A correspondence relationship between voltage and noise indicating the magnitude of vibration corresponding to various conditions is acquired, and the correspondence relation is output to the noise conversion unit, and the vibration detection sensor detects vibration and converts the magnitude of vibration into voltage. Converting and outputting to the noise conversion unit, the noise conversion unit inputs the voltage, converts the voltage to a noise value of a lower floor using the correspondence, and outputs the value to the control unit, and the control The unit compares the noise value with a predetermined threshold value, and outputs a warning output command to the warning unit when the noise value is larger than the threshold value, and the warning unit outputs a warning when the warning output command is received. A message is output. It is intended to.

The vibration noise conversion table is a vibration noise conversion table that stores the correspondence of the value of the noise of the lower floor immediately below the place where the vibration has occurred, the magnitude of the vibration of the upper floor,
Stores the correspondence between the magnitude of vibration detected by the vibration detection sensor and the magnitude of vibration at the place where noise detection is desired, corresponding to the planar distance between the location where noise detection is desired and the location where the vibration detection sensor is installed. And a distance conversion table.

In addition, a plurality of vibration detection sensors are installed,
Corresponding to the planar distance between the place where the plurality of vibration detection sensors are installed and the place where noise is desired to be detected, the voltage output by each vibration detection sensor for the same vibration generated in the place where the noise is desired to be detected The ratio storage means for storing the ratio of the voltage, the value of the voltage output by each vibration detection sensor is input, compared with the ratio of the voltage value stored in the ratio storage means, each vibration detection sensor output When the ratio of the voltage values is substantially the same as the ratio of the voltage values stored in the ratio storage means, at least one of the voltage values output by the vibration detection sensor is output to the noise conversion unit. A filter part can be provided.

Alternatively, a plurality of the vibration detection sensors are installed,
Corresponding to the planar distance between the place where the plurality of vibration detection sensors are installed and the place where noise is to be detected, each vibration detection sensor detects vibration for the same vibration generated at the place where the noise is desired to be detected. And ratio storage means for storing the ratio of the noise value converted by the noise conversion section, and the noise value detected by each vibration detection sensor and converted by the noise conversion section is input and stored in the ratio storage means. The ratio of the noise value detected by each vibration detection sensor and converted by the noise conversion unit is substantially the same as the ratio of the noise value stored in the ratio storage means. In some cases, a filter unit that outputs to the control unit at least one of noise values detected by the vibration detection sensor and converted by the noise conversion unit may be provided.

According to the present invention, the vibration detection sensor can be installed under the floor in a place where a resident is not daily, such as under a kitchen. For this reason, it is easy to perform maintenance of the vibration detection sensor, and it is possible to detect the noise level perceived by the occupants of the lower floor in a place where the occupants of the upper floor are most active.

  Further, according to the noise detection system according to the present invention having the filter portion, only the vibration at the target location is detected by the vibration detection sensor installed at a remote location, and the noise level of the living room immediately below the location is detected. be able to.

  FIG. 1 shows a configuration of a noise detection system 1 according to an embodiment of the present invention.

  The noise detection system 1 of this embodiment includes a vibration detection sensor 2, an electric signal amplification unit 3, a noise conversion unit 4, a control unit 5, a warning unit 6, a noise conversion condition setting unit 7, and an input unit 8. And a vibration noise conversion table 9.

  The vibration noise conversion table 9 includes a direct noise vibration noise conversion table 10 and a distance conversion table 11.

  The electric signal amplifying unit 3 can be referred to as the vibration detecting sensor 12 as a component of the vibration detecting sensor. The vibration detecting sensor 2 and the electric signal amplifying unit 3 are combined.

  The vibration detection sensor 2 or 12 is installed on an upper floor (preferably on a concrete slab), detects vibration of the upper floor, and outputs a voltage signal corresponding to the magnitude of the vibration.

  FIG. 2 shows an example and operation principle of the vibration detection sensor of the present invention.

  As shown in FIG. 2, the vibration detection sensor has a plurality of vibration levers 14 having different lengths on the substrate 13. A strain gauge (not shown) is provided at the base of each vibration lever 14. Each strain gauge is incorporated in an electric circuit so as to output a voltage signal when subjected to strain.

  The vibration levers 14 have different lengths, and each length is set to a length having a primary natural frequency that matches the frequency band of the sound in which the sound pressure level is anxious.

  If a certain vibration is generated, the vibration lever 14 having a length corresponding to the frequency of the vibration vibrates. When the vibration lever 14 vibrates, a voltage signal is output by a strain gauge provided at the base thereof. Which frequency band sound is determined depending on which vibration lever 14 vibrates, and the sound volume is determined depending on the magnitude of the voltage signal.

  The voltage signal is sent to the electric signal amplifying unit 3 and amplified, and then input to the noise conversion unit 4. The noise conversion unit 4 converts the voltage into a noise value.

  The above is the configuration and operation principle of the vibration detection sensor 2. Here, the description of each component in FIG. 1 will be continued.

  The noise conversion unit 4 is a means for converting the voltage of the voltage signal of the vibration detection sensor 2 or 12 into a noise value of the lower floor and outputting it. The conversion is performed based on the correspondence between the predetermined voltage output from the noise conversion condition setting unit 7 and noise.

  The control unit 5 includes a comparison circuit (not shown) that compares the noise value with a predetermined threshold value, inputs the noise value output by the noise conversion unit 4, compares the noise value, and the noise value is greater than the threshold value. In this case, it is means for outputting a warning output command to the warning section.

  The warning unit 6 is a means for outputting a warning message appealing to sight and hearing when receiving a warning output command from the control unit 5.

  The noise conversion condition setting unit 7 is a means for setting conditions for conversion from the voltage to the noise value by the noise conversion unit. The noise conversion condition setting unit 7 has an input unit 8 for inputting the above conditions.

  The vibration noise conversion table 9 is a data storing a predetermined correspondence between voltage and noise indicating the magnitude of vibration by a combination of various conditions of the slab specification, ceiling specification, and distance from the center of the slab to the vibration detection sensor. It is a file. The vibration noise conversion table 9 may take either a table format or a database format.

  In the present embodiment, the vibration noise conversion table 9 includes a directly lower vibration noise conversion table 10 and a distance conversion table 11.

  The direct vibration vibration conversion table 10 stores the correspondence between the magnitude of the upper floor vibration and the value of the lower floor noise immediately below the place where the vibration occurred.

  The distance conversion table 11 stores a correspondence relationship between the magnitude of vibration detected by the vibration detection sensor 2 and the magnitude of vibration at a place where noise is desired to be detected. This correspondence corresponds to a planar distance between a place where noise is desired to be detected and a place where the vibration detection sensor 2 is installed.

  Next, an installation example of the noise detection system 1, a principle for converting vibration into noise, and a condition setting method for a correspondence relationship between vibration and noise will be described.

  FIG. 3 is a plan view of an example of a room on the upper floor.

  In FIG. 3, point 15 is where the resident stays the longest and is active. Point 15 corresponds to the center of the floor slab supported by the structure.

  As shown in FIG. 3, the vibration detection sensor 2 is installed in a place where it does not get in the way, for example, under the floor of a kitchen. The control unit 5 and the warning unit 6 are installed in a place where the user can easily operate.

  The vibration detection sensor 2 and the control unit 5 are connected by wiring.

  FIG. 4 shows a method for estimating the noise in the lower floor room separated by the vibration detection sensor 2. FIG. 4 is a longitudinal sectional view of a floor portion of a living room such as an apartment house.

  As shown in FIG. 4, if vibration occurs at the point 15, the vibration is radiated as noise from the upper floor floor through the slab to the lower floor living room ceiling and into the lower floor living room space.

  It has been proposed that the mean sound pressure effective value for the lower floor room is calculated by the following equation.

P _rms = (U _rms ) ² * R _a * S * (4 / A)
U _rms : Effective value of vibration velocity of floor plate _Ra : Acoustic radiation resistance S: Acoustic radiation area A: Lower floor room sound absorption force Actually, it is difficult to calculate simply by the above equation, and in the present invention, vibration of the upper floor is The relationship between the noise in the living room directly below the slab and the ceiling was changed, and the relationship between the upper floor vibration and the lower floor noise was determined and stored in the direct vibration vibration conversion table 10. Yes.

  On the other hand, the vibration generated at the point 15 is attenuated by the distance between the vibration detection sensors 2 until it is transmitted to the place where the vibration detection sensor 2 is installed.

  In the present invention, the distance conversion table 11 shows the correspondence between the vibration at the place where the noise is detected and the vibration detected by the vibration detection sensor 2 according to the distance between the place where the vibration detection sensor 2 is installed and the place where the noise is detected. Is stored.

  When the vibration detection sensor 2 detects a vibration, the distance conversion table 11 estimates the magnitude of the vibration at the point 15 when the vibration detection sensor 2 detects the vibration by the above-described direct vibration vibration conversion table 10 and the distance conversion table 11. In addition, it is possible to estimate how much noise the estimated vibration will cause in the lower-floor room by using the direct vibration vibration conversion table 10.

  The directly lower vibration noise conversion table 10 and the distance conversion table 11 do not have to be separate tables, and can be combined into one vibration noise conversion table 9 as appropriate.

  Next, processing by the noise detection system 1 will be described.

  First (at the initial setting of the noise detection system 1), the correspondence between the magnitude of vibration used by the noise conversion unit 4 and noise must be set.

  The selection of the correspondence between the magnitude of vibration and noise is selected via the noise conversion condition setting unit 7.

  FIG. 5 shows a method of selecting a correspondence relationship between the magnitude of vibration and noise, that is, a condition setting for noise conversion.

  As shown in FIG. 5, the noise conversion condition involves both the slab specification and the ceiling specification.

  The user inputs slab thickness, slab area, sensor mounting position, slab structure, and floor specification for the slab specification through the input unit 8.

  As the sensor mounting position, the distance from the center of the slab to the place where the vibration detection sensor 2 is installed is input. As for the slab structure, one of a void slab, a PS slab, and an RC slab is selected. As for floor specifications, either a direct floor or a double floor is selected.

  As for the ceiling specification, selection or numerical input is performed for the direct ceiling, double ceiling, and lower floor ceiling height.

  When these conditions are input, the noise conversion condition setting unit 7 refers to the vibration noise conversion table 9 (the directly below vibration noise conversion table 10 and the distance conversion table 11), and determines the magnitude of vibration corresponding to the above conditions. The correspondence relationship between the indicated voltage and noise is acquired.

The noise conversion condition setting unit 7 outputs the acquired correspondence relationship to the noise conversion unit 4, and the noise conversion unit 4 stores the correspondence relationship between the magnitude of the vibration and the noise.

  After the above preparation, when the noise detection system 1 is actually used and vibration occurs, the vibration detection sensor 2 or 12 detects the vibration, converts the vibration magnitude into a voltage, and outputs it to the noise conversion unit 4. To do.

  The noise conversion unit 4 inputs the voltage and converts the voltage into a noise value of the lower floor using the correspondence relationship between the magnitude of vibration stored and the noise and outputs the converted value to the control unit 5.

  The control unit 5 compares the noise value input from the noise conversion unit 4 with a predetermined threshold value using a comparison circuit, and outputs a warning output command to the warning unit 6 if the noise value is larger than the threshold value.

  When the warning unit 6 receives a warning output command, the warning unit 6 outputs a warning message.

  Through the above processing, the vibration detection sensor 2 is installed in a place away from the place where the noise is to be detected, and the noise level of the lower floor room where the noise is to be detected can be estimated by the vibration detected by the vibration detection sensor 2, and a warning is given. A warning message from the section 6 can call attention to a resident on the upper floor.

  Next, a noise detection system according to the second embodiment of the present invention will be described.

  FIG. 6 shows the configuration of the noise detection system 20 according to the second embodiment of the present invention.

  The noise detection system 20 of the present embodiment is the first implementation of the present invention in that there are a plurality of vibration detection sensors (the case where two vibration detection sensors are provided in the following description) and the filter unit 21 is present. It is the same as that of 1st embodiment of this invention except for a form.

  For ease of understanding, the same reference numerals in FIG. 6 denote the same parts as in FIG. 1, and a duplicate description will be omitted.

  In FIG. 6, each vibration detection sensor 12 (vibration detection sensor 2 and electric signal amplification unit 3, hereinafter simply referred to as “vibration detection sensor 12”) includes a noise conversion condition setting unit 7, an input unit 8, and a noise conversion unit 4. Although shown to be connected, this is an illustration for ease of understanding, and actually a plurality of vibration detection sensors 12 (vibration detection sensor 2 and electric signal amplification unit 3) are combined into one noise conversion condition setting unit 7. It is preferable to connect to the set of the input unit 8 and the noise conversion unit 4.

  The filter unit 21 is connected to receive the output from the noise conversion unit 4 and transmit the output to the control unit 5.

  In the noise conversion unit 4, each vibration detection sensor 12 is specified, and the vibration magnitude and noise of each vibration detection sensor 12 are determined according to the distance between each vibration detection sensor 12 and the place where noise is to be detected. The correspondence is stored. In FIG. 6, the noise conversion condition setting unit 7 and the input unit with respect to the noise conversion unit 4 for each vibration detection sensor 12 are meant to indicate that the correspondence is specified and selected for each vibration detection sensor 12. 8 is output.

  When the noise value is input from the noise conversion unit 4, the filter unit 21 can grasp which vibration detection sensor 12 calculates the noise value from the vibration detected.

  The filter unit 21 corresponds to the planar distance between the place where each vibration detection sensor 12 is installed and the place where noise is desired to be detected, and each vibration detection sensor detects the same vibration generated at the place where the noise is desired to be detected. 12 has a ratio storage means (not shown) for detecting the vibration and storing the ratio of the noise values converted by the noise conversion unit 4.

  In the actual noise detection scene, when one vibration is generated, each vibration detection sensor 12 detects the vibration and outputs it to the noise conversion unit 4 as a voltage signal. The noise conversion unit 4 inputs the voltage, converts the vibration into a noise value, and outputs it to the filter unit 21. When the noise value is input from the noise conversion unit 4, the filter unit 21 grasps which vibration detection sensor 12 converts the noise value from the vibration detected by the vibration detection sensor 12. Enter the noise value converted from the detected vibration. Next, the filter unit 21 compares the noise value detected by each vibration detection sensor 12 and converted by the noise conversion unit 4 with the ratio of the noise value stored in the ratio storage unit. As a result, vibration detection is performed when the ratio of the noise value detected by each vibration detection sensor 12 and converted by the noise conversion unit 4 is substantially the same as the ratio of the noise value stored in the ratio storage means. At least one of the noise values detected by the sensor 12 and converted by the noise conversion unit 4 is output to the control unit 5.

  FIG. 7 is a modification of the noise detection system 20 shown in FIG.

  The noise detection system 22 shown in FIG. 7 is different from the noise detection system 20 of FIG.

  The noise detection system 22 is connected so as to receive the output from the vibration detection sensor 12 and transmit the output to the noise conversion unit 4.

  The filter unit 21 detects each vibration with respect to the same vibration generated in the place where the noise is to be detected, corresponding to the planar distance between the place where each vibration detection sensor 12 is installed and the place where the noise is to be detected. Ratio storage means (not shown) for storing the ratio of the voltage output from the sensor 12 is provided.

  When the voltage signal is input, the filter unit 21 can grasp which voltage signal is the voltage calculated from the vibration detected by which vibration detection sensor 12.

  In the actual noise detection scene, when one vibration occurs, each vibration detection sensor 12 detects the vibration, converts it into a voltage signal, and outputs it to the filter unit 21. The filter unit 21 recognizes which vibration detection sensor 12 the input voltage signal is the voltage calculated from, and inputs the voltage value from all the vibration detection sensors 12.

  Next, the filter unit 21 compares the ratio of the voltage value output by each vibration detection sensor 12 with the ratio of the voltage value stored in the ratio storage unit, and when the ratio is substantially the same, At least one of the voltage values output from the vibration detection sensor 12 is output to the noise conversion unit 4.

  When a voltage signal is input from the filter unit 21, the noise conversion unit 4 specifies which vibration detection sensor 12 the voltage signal is calculated from and detects the corresponding relationship between vibration and noise. The value of the noise is output to the control unit 5 by using it.

  As described above, the control unit 5 causes the warning unit 6 to output a warning message when the noise value exceeds the threshold value.

  Next, it will be described below with reference to FIG. 8 that only the vibration and noise at a place where noise is desired to be detected can be detected by the noise detection systems 20 and 22 shown in FIGS.

  In FIG. 8, point A indicates a place where noise is desired to be detected. Point B indicates a place where vibration or noise is not detected.

  Assume that two vibration detection sensors 12 (assumed to be vibration detection sensors 12a and 12b) are installed in the place shown in FIG. In addition, it is assumed that the filter unit 21, the noise conversion unit 4, and the control unit 5 are installed at the place shown in FIG.

  Since the point A where the noise is desired to be detected and the locations of the vibration detection sensor 12a and the vibration detection sensor 12b can be known in advance, the distance L1 between the point A where the noise is desired to be detected and the vibration detection sensor 12a and the point A where the noise is desired are detected. And a distance L2 between the vibration detection sensor 12 point B is predetermined.

  Since the distance L1 and the distance L2 are known, the ratio of the magnitude of vibration detected by the vibration detection sensor 12a and the vibration detection sensor 12b in consideration of attenuation due to the distance with respect to the same vibration generated at the point A Is also known.

  Therefore, when vibration occurs at point A, regardless of the magnitude of the vibration, the ratio of the voltage values to be output by the vibration detection sensor 12a and the vibration detection sensor 12b, or the noise conversion unit from those voltages. The ratio of the noise values converted and output by 4 is a predetermined ratio determined by the distance L1 and the distance L2.

  On the other hand, for example, when vibration occurs at point B where noise is not desired to be detected, the distance between point B and vibration detection sensor 12a and the distance between point B and vibration detection sensor 12b are L3. Therefore, the ratio of the magnitude of vibration detected by the vibration detection sensor 12a and the vibration detection sensor 12b with respect to the same vibration does not match the ratio in the case of the point A. Naturally, the ratio of the noise value detected by the vibration detection sensors 12a and 12b from the vibration generated at the point B and converted by the noise conversion unit 4 does not match the ratio at the point A.

  As a result, noise and vibration generated in places other than the point A where noise is desired to be detected are eliminated as noise and are not transmitted to the control unit 5.

  In addition, although it is also considered that a vibration arises simultaneously in several places, since this invention detects a vibration for every frequency of a vibration, there is little overlap. Further, when vibrations occur at a plurality of locations at the same time, a warning message can be output uniformly.

1 is a configuration diagram of a noise detection system according to a first embodiment of the present invention. The figure explaining the structure and effect | action of the vibration detection sensor by one Embodiment of this invention. The top view which shows the example of installation of the noise detection system by one Embodiment of this invention. The figure explaining the principle of the noise detection by one Embodiment of this invention. The figure explaining the setting method of the noise conversion conditions by one Embodiment of this invention. The block diagram of the noise detection system by 2nd Embodiment of this invention. The block diagram of the noise detection system by the modification of 2nd Embodiment of this invention. The figure explaining the principle which detects only the noise of the target place by the filter part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Noise detection system 2 Vibration detection sensor 3 Electric signal amplification part 4 Noise conversion part 5 Control part 6 Warning part 7 Noise conversion condition setting part 8 Input part 9 Vibration noise conversion table 10 Directly below vibration noise conversion table 11 Distance conversion table 12 Vibration Detection sensor 13 Substrate 14 Vibration lever 15 Point 20 Noise detection system 21 Filter unit 22 Noise detection system

Claims (4)

A vibration detection sensor that detects the vibration of the upper floor and outputs a voltage signal corresponding to the magnitude of the vibration;
A noise conversion unit that converts the voltage of the voltage signal into a lower floor noise value and outputs it,
A noise conversion condition setting unit that has an input unit and sets a condition for conversion from the voltage to a noise value by the noise conversion unit;
A vibration noise conversion table storing a predetermined correspondence between voltage and noise indicating the magnitude of vibration by a combination of slab specifications, ceiling specifications, and various conditions of distance from the center of the slab to the vibration detection sensor;
A noise value output from the noise conversion unit is input, and a comparison circuit is provided for comparing the noise value with a predetermined threshold value. When the noise value is larger than the threshold value, a warning output command is output to the warning unit. A control unit,
A warning unit for inputting a warning output command of the control unit and outputting a warning message;
The noise conversion condition setting unit inputs slab specifications, ceiling specifications, and various conditions of the distance from the center of the slab to the vibration detection sensor via the input unit, referring to the vibration noise conversion table, A correspondence relationship between voltage and noise indicating the magnitude of vibration corresponding to various conditions is acquired, and the correspondence relation is output to the noise conversion unit, and the vibration detection sensor detects vibration and converts the magnitude of vibration into voltage. Converting and outputting to the noise conversion unit, the noise conversion unit inputs the voltage, converts the voltage to a noise value of a lower floor using the correspondence, and outputs the value to the control unit, and the control The unit compares the noise value with a predetermined threshold value, and outputs a warning output command to the warning unit when the noise value is larger than the threshold value, and the warning unit outputs a warning when the warning output command is received. A message is output. Noise detection system. The vibration noise conversion table is a vibration noise conversion table that stores the correspondence of the value of the noise of the lower floor immediately below the place where the vibration has occurred, the magnitude of the vibration of the upper floor,
Stores the correspondence between the magnitude of vibration detected by the vibration detection sensor and the magnitude of vibration at the place where noise detection is desired, corresponding to the planar distance between the location where noise detection is desired and the location where the vibration detection sensor is installed. The noise detection system according to claim 1, comprising a distance conversion table. A plurality of the vibration detection sensors are installed,
Corresponding to the planar distance between the place where the plurality of vibration detection sensors are installed and the place where noise is desired to be detected, the voltage output by each vibration detection sensor for the same vibration generated in the place where the noise is desired to be detected The ratio storage means for storing the ratio of the voltage, the value of the voltage output by each vibration detection sensor is input, compared with the ratio of the voltage value stored in the ratio storage means, each vibration detection sensor output When the ratio of the voltage values is substantially the same as the ratio of the voltage values stored in the ratio storage means, at least one of the voltage values output by the vibration detection sensor is output to the noise conversion unit. The noise detection system according to claim 1, further comprising a filter unit. In addition, a plurality of vibration detection sensors are installed,
Corresponding to the planar distance between the place where the plurality of vibration detection sensors are installed and the place where noise is to be detected, each vibration detection sensor detects vibration for the same vibration generated at the place where the noise is desired to be detected. And ratio storage means for storing the ratio of the noise value converted by the noise conversion section, and the noise value detected by each vibration detection sensor and converted by the noise conversion section is input and stored in the ratio storage means. The ratio of the noise value detected by each vibration detection sensor and converted by the noise conversion unit is substantially the same as the ratio of the noise value stored in the ratio storage means. 3. The filter unit according to claim 1, further comprising a filter unit that outputs to the control unit at least one of noise values detected by the vibration detection sensor and converted by the noise conversion unit. Noise detection as described in Stem.

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