CN110779617A - Low-frequency noise test analysis system and analysis method thereof - Google Patents
Low-frequency noise test analysis system and analysis method thereof Download PDFInfo
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- CN110779617A CN110779617A CN201911147471.4A CN201911147471A CN110779617A CN 110779617 A CN110779617 A CN 110779617A CN 201911147471 A CN201911147471 A CN 201911147471A CN 110779617 A CN110779617 A CN 110779617A
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- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
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Abstract
The invention discloses a low-frequency noise test analysis system and an analysis method thereof. The device belongs to the technical field of searching of combined noise source transmission paths of multiple noise sources, can detect the combined noise source transmission path sent by the multiple noise sources, and comprises a shell and a laser lamp, wherein a data processing module and a controller are respectively arranged in the shell, a support is arranged on the upper surface of the shell, and a first universal rotating mechanism is arranged on the support; five sound measuring tubes are arranged on the first universal rotating mechanism, the five sound measuring tubes are equal in length, the diameters of tube holes are equal, and tube axes are parallel to each other; the front end surfaces of the five sound measuring tubes are also in the same vertical plane; and a noise sensor is respectively arranged in each sound measuring tube, the laser lamp is also arranged in the fifth sound measuring tube, and the central line of light emitted by the laser lamp and the central line of the fifth sound measuring tube are on the same straight line.
Description
Technical Field
The invention relates to the technical field of searching of combined noise source transmission paths of multiple noise sources, in particular to a low-frequency noise test analysis system and an analysis method thereof.
Background
In a workshop, a plurality of machine platforms emit noise at the same time, but sometimes an area S with low noise is needed outside and in the workshop, and the existing method generally adopts a method that the area needing low noise is made into a room with sound insulation by using sound insulation plates, so that the cost for building the sound insulation room is high, and the occupied space of the sound insulation plates for the sound insulation room is large. If a combined noise source transmission path of multiple noise sources is found, noise at the area S can be shielded in a large amount by installing a noise isolation sheet on the combined noise source transmission path of the multiple noise sources.
Disclosure of Invention
The invention aims to solve the problem that no equipment and method for detecting the combined noise source transmission path of multiple noise sources exist at present, and provides a low-frequency noise test analysis system and an analysis method thereof, wherein the low-frequency noise test analysis system is simple in structure and convenient to use and can detect the combined noise source transmission path emitted by the multiple noise sources.
The technical problem is solved by the following technical scheme:
the low-frequency noise test analysis system comprises a shell and a laser lamp, wherein a data processing module and a controller are respectively arranged in the shell, a support is arranged on the upper surface of the shell, and a first universal rotating mechanism is arranged on the support;
five sound measuring tubes are arranged on the first universal rotating mechanism, the five sound measuring tubes are equal in length, the diameters of tube holes are equal, and tube axes are parallel to each other; the front end surfaces of the five sound measuring tubes are also in the same vertical plane; the first sound measuring tube of the five sound measuring tubes is arranged right above the fifth sound measuring tube, and the second sound measuring tube is arranged right below the fifth sound measuring tube; the third sound measuring tube is arranged right to the left of the fifth sound measuring tube, and the fourth sound measuring tube is arranged right to the fifth sound measuring tube; the first sound measuring tube and the second sound measuring tube are arranged in a left-right symmetrical mode relative to the fifth sound measuring tube, and the third sound measuring tube and the fourth sound measuring tube are also arranged in a left-right symmetrical mode relative to the fifth sound measuring tube;
a noise sensor is respectively arranged in the fifth sound measuring tube, the first sound measuring tube, the second sound measuring tube, the third sound measuring tube and the fourth sound measuring tube, the laser lamp is also arranged in the fifth sound measuring tube, and the central line of light emitted by the laser lamp and the tube center line of the fifth sound measuring tube are on the same straight line;
the control end of the first universal rotating mechanism, the control end of the laser lamp, the data processing module and each noise sensor are respectively connected with the controller.
In use, the system is first placed at the desired low noise region S according to the low frequency noise test analysis.
Then simultaneously starting the noise sensors in the first sound measuring pipe, the second sound measuring pipe, the third sound measuring pipe and the fourth sound measuring pipe, and uploading the noise information detected by each noise sensor at the same moment to the controller;
then the data processing module compares the noise intensity of the uploaded noise information, and if the noise intensity A1 detected by the noise sensor in the first sound tube is greater than or less than the noise intensity A2 detected by the noise sensor in the second sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the first sound tube is equal to the noise intensity detected by the noise sensor in the second sound tube; similarly, if the noise intensity A3 detected by the noise sensor in the third sound tube is greater than or less than the noise intensity a4 detected by the noise sensor in the fourth sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the third sound tube is equal to the noise intensity detected by the noise sensor in the fourth sound tube;
when A1= A2= A3= A4, stopping the rotation of the first universal rotating mechanism; then, a noise sensor in a fifth sound tube is started to detect the noise intensity A5, and the laser lamp is turned on at the same time, so that a section of path irradiated by light emitted by the laser lamp is a path which needs to be passed by the combined noise source of the multiple noise sources during transmission, and a combined noise source transmission path of the multiple noise sources is found.
After a combined noise source transmission path of multiple noise sources is found, noise in the area S can be largely shielded by providing a sound insulating board or a sound absorbing board on the combined noise source transmission path of the multiple noise sources. This scheme need not to separate into soundproof room with the acoustic celotex board with regional S department, has reduced the use of acoustic celotex board, has just also reduced the area of acoustic celotex board and has reduced the cost of sound insulation processing, simple structure, and convenient to use can detect out the combined noise sound source transmission path that many noise sources sent.
Preferably, a sound insulation plate is arranged at the right port of each sound measuring pipe, and a sound attenuation layer is further arranged on the inner pipe wall of each sound measuring pipe.
The noise elimination layer reduces the echo of noise in the sound measuring pipe, and the reliability is good.
And a wireless module connected with the controller is also arranged in the shell.
The wireless module can enable the low-frequency noise test analysis system to be wirelessly connected with an external computer or an intelligent terminal, and the low-frequency noise test analysis system is convenient to control and manage.
An analysis method according to a low-frequency noise test analysis system comprises a combined noise source transmission path searching method of multiple noise sources, and the implementation process of the combined noise source transmission path searching method of the multiple noise sources is as follows:
the analysis system according to the low frequency noise test is first placed at the desired low noise region S.
Then simultaneously starting the noise sensors in the first sound measuring pipe, the second sound measuring pipe, the third sound measuring pipe and the fourth sound measuring pipe, and uploading the noise information detected by each noise sensor at the same moment to the controller;
then the data processing module compares the noise intensity of the uploaded noise information, and if the noise intensity A1 detected by the noise sensor in the first sound tube is greater than or less than the noise intensity A2 detected by the noise sensor in the second sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the first sound tube is equal to the noise intensity detected by the noise sensor in the second sound tube; similarly, if the noise intensity A3 detected by the noise sensor in the third sound tube is greater than or less than the noise intensity a4 detected by the noise sensor in the fourth sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the third sound tube is equal to the noise intensity detected by the noise sensor in the fourth sound tube;
when A1= A2= A3= A4, stopping the rotation of the first universal rotating mechanism; then, a noise sensor in a fifth sound tube is started to detect the noise intensity A5, and the laser lamp is turned on at the same time, so that a section of path irradiated by light emitted by the laser lamp is a path which needs to be passed by the combined noise source of the multiple noise sources during transmission, and a combined noise source transmission path of the multiple noise sources is found.
The invention can achieve the following effects:
the invention does not need to partition the area S into sound insulation rooms by sound insulation boards, reduces the use of the sound insulation boards, reduces the occupied area of the sound insulation boards and the cost of sound insulation treatment, has simple structure and convenient use, and can detect the transmission path of the combined noise source emitted by multiple noise sources.
Drawings
Fig. 1 is a schematic view of a connection structure according to the present invention.
Fig. 2 is a schematic cross-sectional connection structure of a fifth sound tube according to the present invention.
FIG. 3 is a schematic view of a connection structure in a use state of the present invention when no noise isolation board is provided on a combined noise source transmission path of multiple noise sources.
FIG. 4 is a schematic view of a connection structure in a use state when a noise isolation plate is disposed on a combined noise source transmission path of multiple noise sources according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
Example, a low frequency noise test analysis system, see fig. 1-4. The device comprises a shell 2 and a laser lamp 12, wherein a data processing module 3 and a controller 4 are respectively arranged in the shell, a support 1 is arranged on the upper surface of the shell, and a first universal rotating mechanism 8 is arranged on the support;
five sound measuring tubes are arranged on the first universal rotating mechanism, the five sound measuring tubes are equal in length, the diameters of tube holes are equal, and tube axes are parallel to each other; the front end surfaces of the five sound measuring tubes are also in the same vertical plane; a first sound measuring tube 13 of the five sound measuring tubes is arranged right above the fifth sound measuring tube 11, and a second sound measuring tube 7 is arranged right below the fifth sound measuring tube; the third sound measuring tube 15 is arranged right to the left of the fifth sound measuring tube, and the fourth sound measuring tube 10 is arranged right to the fifth sound measuring tube; the first sound measuring tube and the second sound measuring tube are arranged in a left-right symmetrical mode relative to the fifth sound measuring tube, and the third sound measuring tube and the fourth sound measuring tube are also arranged in a left-right symmetrical mode relative to the fifth sound measuring tube;
a noise sensor 17 is arranged in the fifth sound measuring pipe, a noise sensor 14 is arranged in the first sound measuring pipe, a noise sensor 6 is arranged in the second sound measuring pipe, a noise sensor 16 is arranged in the third sound measuring pipe, a noise sensor 9 is arranged in the fourth sound measuring pipe, the laser lamp is also arranged in the fifth sound measuring pipe, and the central line of light 18 emitted by the laser lamp and the pipe central line of the fifth sound measuring pipe are on the same straight line;
the control end of the first universal rotating mechanism, the wireless module, the control end of the laser lamp, the data processing module and each noise sensor are respectively connected with the controller.
The noise sensor in the fifth sound tube measures the noise level a5 of the combined noise source of the multiple noise sources.
A wireless module 5 connected with the controller is also arranged in the shell. And a wireless module connected with the controller is also arranged in the shell. The wireless module can enable the low-frequency noise test analysis system to be wirelessly connected with an external computer or an intelligent terminal, and the low-frequency noise test analysis system is convenient to control and manage.
The right port of each sound measuring pipe is provided with a sound insulation plate 22, and the inner pipe wall of each sound measuring pipe is also provided with a sound attenuation layer 23. The noise elimination layer reduces the echo of noise in the sound measuring pipe, and the reliability is good.
According to the analysis method of the low-frequency noise test analysis system, the analysis method comprises a combined noise source transmission path searching method of multiple noise sources, and the realization process of the combined noise source transmission path searching method of the multiple noise sources is as follows:
in use, the system is first placed at the desired low noise region S according to the low frequency noise test analysis.
Then simultaneously starting the noise sensors in the first sound measuring pipe, the second sound measuring pipe, the third sound measuring pipe and the fourth sound measuring pipe, and uploading the noise information detected by each noise sensor at the same moment to the controller;
then the data processing module compares the noise intensity of the uploaded noise information, and if the noise intensity A1 detected by the noise sensor in the first sound tube is greater than or less than the noise intensity A2 detected by the noise sensor in the second sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the first sound tube is equal to the noise intensity detected by the noise sensor in the second sound tube; similarly, if the noise intensity A3 detected by the noise sensor in the third sound tube is greater than or less than the noise intensity a4 detected by the noise sensor in the fourth sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the third sound tube is equal to the noise intensity detected by the noise sensor in the fourth sound tube;
when A1= A2= A3= A4, stopping the rotation of the first universal rotating mechanism; then, a noise sensor in the fifth sound tube is started to detect the noise intensity A5, and the laser lamp is turned on at the same time, so that the path irradiated by the light 18 emitted by the laser lamp is the path 24 which needs to be passed by the combined noise source of the multiple noise sources 20 during transmission, and the combined noise source transmission path of the multiple noise sources is found. The paths 19 of the sub-noise sources 20 are combined to form a path 24 which needs to be passed when the combined noise source is transmitted.
When combined noise source transmission path 24 of multiple noise sources is found, noise in region S can be largely shielded by providing sound insulation sheet 21 or a sound insulation sheet on combined noise source transmission path 24 of multiple noise sources. The region S of the present embodiment is where the low frequency noise test analysis system is placed.
This embodiment need not to separate into the room that gives sound insulation with the acoustic celotex board with regional S department, has reduced the use of acoustic celotex board, has just also reduced the area of acoustic celotex board and has reduced the cost that gives sound insulation and handle, simple structure, convenient to use can detect out the combined noise sound source transmission path that many noise sources sent.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the implementation is not limited to the above-described embodiments, and those skilled in the art can make various changes or modifications within the scope of the appended claims.
Claims (4)
1. The low-frequency noise test analysis system is characterized by comprising a shell and a laser lamp, wherein a data processing module and a controller are respectively arranged in the shell;
five sound measuring tubes are arranged on the first universal rotating mechanism, the five sound measuring tubes are equal in length, the diameters of tube holes are equal, and tube axes are parallel to each other; the front end surfaces of the five sound measuring tubes are also in the same vertical plane; the first sound measuring tube of the five sound measuring tubes is arranged right above the fifth sound measuring tube, and the second sound measuring tube is arranged right below the fifth sound measuring tube; the third sound measuring tube is arranged right to the left of the fifth sound measuring tube, and the fourth sound measuring tube is arranged right to the fifth sound measuring tube; the first sound measuring tube and the second sound measuring tube are arranged in a left-right symmetrical mode relative to the fifth sound measuring tube, and the third sound measuring tube and the fourth sound measuring tube are also arranged in a left-right symmetrical mode relative to the fifth sound measuring tube;
a noise sensor is respectively arranged in the fifth sound measuring tube, the first sound measuring tube, the second sound measuring tube, the third sound measuring tube and the fourth sound measuring tube, the laser lamp is also arranged in the fifth sound measuring tube, and the central line of light emitted by the laser lamp and the tube center line of the fifth sound measuring tube are on the same straight line;
the control end of the first universal rotating mechanism, the control end of the laser lamp, the data processing module and each noise sensor are respectively connected with the controller.
2. The low frequency noise test analysis system of claim 1, wherein a sound insulation plate is disposed at the right port of each sound measuring tube, and a sound attenuation layer is further disposed on the inner tube wall of each sound measuring tube.
3. The system for testing and analyzing low-frequency noise according to claim 1, wherein a wireless module connected with the controller is further disposed in the housing.
4. An analysis method of a low-frequency noise test analysis system according to claim 1, wherein the analysis method comprises a combined noise source transmission path searching method of multiple noise sources, and the combined noise source transmission path searching method of multiple noise sources is implemented as follows:
firstly, the system is placed in a region S with low noise according to the low-frequency noise test analysis;
then, simultaneously starting the noise sensors in the first sound measuring pipe and the second sound measuring pipe, the third sound measuring pipe and the fourth sound measuring pipe, and uploading the noise information detected by each noise sensor at the same moment to the controller;
then, the data processing module compares the noise intensity of each uploaded noise information and calculates the vibration frequency, and if the noise intensity A1 detected by the noise sensor in the first sound tube is greater than or less than the noise intensity A2 detected by the noise sensor in the second sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or left until the noise intensity detected by the noise sensor in the first sound tube is equal to the noise intensity detected by the noise sensor in the second sound tube; similarly, if the noise intensity A3 detected by the noise sensor in the third sound tube is greater than or less than the noise intensity a4 detected by the noise sensor in the fourth sound tube, the controller controls the first universal rotating mechanism to rotate towards the right or the left until the noise intensity detected by the noise sensor in the third sound tube is equal to the noise intensity detected by the noise sensor in the fourth sound tube;
when A1= A2= A3= A4, stopping the rotation of the first universal rotating mechanism; then, a noise sensor in a fifth sound tube is started to detect the noise intensity A5, and the laser lamp is turned on at the same time, so that a section of path irradiated by light emitted by the laser lamp is a path which needs to be passed by the combined noise source of the multiple noise sources during transmission, and a combined noise source transmission path of the multiple noise sources is found.
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