A device and method for evaluating floor impact sound pressure

Abstract

The present invention discloses an evaluation device and method for floor impact sound pressure, the evaluation device comprises a test unit and an impact unit which are separately arranged; the test unit comprises a shell and a first bracket for supporting the shell, the shell is hinged on the first bracket through a horizontal X hinge axis and a longitudinal Y hinge axis, a sound collecting hole is arranged on the shell, a diaphragm facing the sound collecting hole and an evaluation system electrically connected to the diaphragm are arranged in the shell; the impact unit comprises an impact object body and an impact object placement part, the impact object body can fall from the impact object placement part and impact the object to be tested. The present invention is suitable for real-time detection at the engineering site, does not need to prepare samples separately, can be quickly moved and arranged between different selected points at the test site, not only effectively meets the real-time detection needs of construction units, design units, construction units, supervision units, owner units, etc. in green building projects, but also can save a lot of test time costs, quickly feedback engineering effects, and greatly reduce detection costs.

Description

Technical Field

[0001] The invention relates to the field of floor sound insulation effect testing, and in particular to a floor impact sound pressure evaluation device and method. Background Art

[0002] The floor impact sound pressure test is an important part of the green building rating and an important aspect of healthy living and ecological buildings. It is reported that long-term working and living in an environment with noise exceeding 75dB will cause hearing loss, mental weakness and other health problems.

[0003] According to the requirements of the national standard "Green Building Evaluation Standard" GB / T 50378-2019 and the Shenzhen local standard "Green Building Evaluation Standard" SJG 47-2018, the floors of residential buildings, office buildings, shopping malls, hotels and other public buildings should be treated with sound insulation and noise reduction. At present, the floor sound insulation mainly adopts floating floor, laying elastic floor, laying sound insulation ceiling and other methods, which can achieve a certain degree of impact sound pressure reduction and weaken the effect of noise propagation. However, in order to detect the actual effect of different construction schemes and different sound insulation materials in the sound insulation of green buildings, the current method is mainly for the construction unit to prepare the same materials and entrust the corresponding testing agency to conduct inspection experiments. The inspection process is complicated, demanding, expensive and long, and it cannot reflect the actual situation of engineering construction in a timely and effective manner.

[0004] The invention patent application with application number: 201610408142.0 discloses a test device and test method for the impact sound insulation performance of floor sound insulation materials, which also selects a piece of sound insulation material and fixes it on the device for testing. At present, there is still a lack of a test method and supporting special instruments that can conduct real-time detection on the construction site and can more accurately and conveniently reflect the actual sound insulation effect of the floor. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for evaluating floor impact sound pressure to solve the problems existing in the above-mentioned prior art. The device is suitable for real-time detection at engineering sites, does not require separate preparation of samples, can be quickly moved and arranged between different selected points at the test site, and can adjust the direction of the sound collection holes according to the location of the sound source. The device is simple to operate and has accurate detection.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a floor impact sound pressure assessment device, comprising a test unit and an impact unit which are separately arranged;

[0007] The test unit comprises a shell and a first bracket for supporting the shell, the shell is hinged on the first bracket through a horizontal X hinge axis and a longitudinal Y hinge axis, a sound collecting hole is arranged on the shell, a diaphragm facing the sound collecting hole and an evaluation system electrically connected to the diaphragm are arranged in the shell;

[0008] The impact unit includes a striker body and a striker placement portion, and the striker body can fall from the striker placement portion and impact the object to be tested.

[0009] Preferably, a signal transmitter is provided on the impact unit, and a signal receiver is provided on the shell, the signal receiver is used to receive the signal sent by the signal transmitter and obtain the position information of the signal transmitter, the shell is connected to the Y-axis motor through the Y-hinged axis, and is connected to the X-axis motor through the X-hinged axis, when the signal receiver receives the signal from the signal transmitter and obtains the position information, the X-axis motor and the Y-axis motor drive the shell to rotate so that the sound collection hole faces the impact unit.

[0010] Preferably, the diaphragm is attached to the sound collecting hole.

[0011] Preferably, damping material is provided at the bottom end of the first bracket and at the connection position between the first bracket and the shell.

[0012] Preferably, the impactor placement portion comprises an inclined placement platform and a baffle, wherein the baffle is arranged at a high end of the placement platform, and the impactor body falls from a low end of the placement platform.

[0013] Preferably, the impact unit further includes a second bracket, and the storage platform is fixed on the second bracket.

[0014] Preferably, the heights of the first bracket and the second bracket are both adjustable.

[0015] Preferably, the device further comprises a display arranged on the outer wall of the shell, wherein the display is electrically connected to the assessment system.

[0016] Preferably, the impactor body is a solid steel sphere.

[0017] The present invention also provides a method for evaluating floor impact sound pressure, comprising the following steps:

[0018] S01: selecting a test object, and selecting a impact unit points and b test unit points according to the test object;

[0019] S02: placing the test unit at one of the test unit points, adjusting the direction and height of the sound collection hole of the test unit to the specified requirements, and keeping the test unit stable and the damping material of the first bracket working normally;

[0020] Placing the impact unit at one of the impact unit points, and adjusting the placement platform of the impact unit to a specified height;

[0021] S03: starting the test unit, placing the impactor body on the placement table and fitting it to the baffle, and then releasing the impactor body, wherein the impactor body is accelerated by the inclination angle of the placement table and released through the release port;

[0022] S04: The test unit collects the impact noise through the sound collection hole, compares it with the preset threshold after signal conversion, and finally gives a measurement result of "yes" or "no";

[0023] S05: The test unit point remains unchanged, the impact unit point is changed, and S02-S04 are repeated until the test of a impact unit points is completed. When the test results of a impact unit points are all "yes", the test result of the test unit point is determined to be "qualified";

[0024] S06: Adjust the test unit points, repeat S02-S05, until the test of b test unit points is completed. When the test results of b test unit points are all "qualified", the test result is evaluated as qualified.

[0025] Compared with the prior art, the present invention has achieved the following technical effects:

[0026] 1. The present invention is suitable for real-time detection at engineering sites. It does not require separate sample preparation and can be quickly moved and arranged between different test points at the test site. It not only effectively meets the real-time detection needs of construction units, design units, construction units, supervision units, and owner units in green building projects, but also can save a lot of testing time costs, quickly feedback engineering effects, and significantly reduce testing costs.

[0027] 2. The shell is hinged to the first bracket through a horizontal X-hinged axis and a longitudinal Y-hinged axis, so that the shell can adjust the horizontal angle and the pitch angle according to the actual position of the sound source point, so that the sound collection hole is facing the sound source position, making the collected noise more accurate.

[0028] 3. By setting a signal receiver on the shell and a signal transmitter on the impact unit, the X-axis motor and the Y-axis motor can drive the shell to rotate automatically according to the impact unit position signal obtained by the signal receiver, so that the sound collection hole can automatically face the impact unit without manual adjustment, making the entire detection process more convenient.

[0029] 4. By tilting the placement table of the impact unit, the impact object can use the inclination angle to obtain an initial velocity when falling, which can more realistically simulate the falling of an object in real life, making the detection process more practical and more valuable for reference. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a schematic diagram of the test unit structure;

[0032] Figure 2 is a schematic diagram of the impact unit structure;

[0033] Figure 3 This is a flow chart of the evaluation method for floor impact sound pressure;

[0034] Among them, 1 is a shell, 2 is a first bracket, 3 is a hinged part, 4 is a sound collecting hole, 5 is a diaphragm, 6 is an evaluation system, 7 is a damping material, 8 is a display, 9 is a rangefinder, 10 is a power jack, 11 is the impact object body, 12 is a storage table, 13 is a baffle, and 14 is a second bracket. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The purpose of the present invention is to provide a device and method for evaluating floor impact sound pressure to solve the problems existing in the prior art. The device is suitable for real-time detection at engineering sites, does not require separate preparation of samples, can be quickly moved and arranged between different selected points at the test site, and can adjust the direction of the sound collection holes according to the location of the sound source. The device is simple to operate and has accurate detection.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1

[0039] like Figure 1-Figure 2As shown, this embodiment provides a floor impact sound pressure assessment device, including a test unit and an impact unit that are separately arranged;

[0040] like Figure 1 As shown, the test unit includes a shell 1 and a first bracket 2 for supporting the shell 1, the connecting portion between the shell 1 and the first bracket 2 has a hinge portion 3, the hinge portion 3 includes a horizontal X-hinge axis and a longitudinal Y-hinge axis, and the shell 1 is hinged to the first bracket 2 through the horizontal X-hinge axis and the longitudinal Y-hinge axis.

[0041] When the housing 1 needs to rotate during the test, the housing 1 can be driven to rotate by a motor, or the housing 1 can be rotated manually, and the direction of the housing 1 can be adjusted by rotating the X-articulated axis and the Y-articulated axis at the hinge 3. When the manual adjustment mode is adopted, a locking device is also required to be provided at the X-articulated axis and the Y-articulated axis to fix the housing 1 after the direction is adjusted.

[0042] The housing 1 is provided with a sound collecting hole 4, and the housing 1 is provided with a diaphragm 5 facing the sound collecting hole 4 and an evaluation system 6 electrically connected to the diaphragm 5. A certain distance may be left between the diaphragm 5 and the sound collecting hole 4, but the distance should not be too large. As a preferred embodiment, in this embodiment, the diaphragm 5 is arranged to fit on the sound collecting hole 4.

[0043] The impact unit includes an impact body 11 and an impact placement portion. The impact body 11 can fall from the impact placement portion and impact the object to be tested. The object to be tested is a floor slab covered with various sound insulation materials. Of course, the device of the present invention can also perform sound insulation tests on bare floors.

[0044] Furthermore, in the actual test process, the test of the intersection point will be involved, that is, it is necessary to test several impact unit points at different positions in one test unit point test. In order to make the entire test process faster, more accurate and more efficient, in this embodiment, a signal transmitter is also set on the impact unit, and a signal receiver is set on the shell 1. The signal receiver is used to receive the signal sent by the signal transmitter and obtain the position information of the signal transmitter, wherein the signal sent by the signal transmitter should be a signal that can penetrate the wall. The signal receiver is preferably set at the top surface of the shell 1 near the sound collection hole 4. The shell 1 is connected to the Y-axis motor through the Y-axis hinge shaft and to the X-axis motor through the X-axis hinge shaft. When the signal receiver receives the signal from the signal transmitter and obtains the position information, the X-axis motor and the Y-axis motor drive the shell 1 to rotate so that the sound collection hole 4 faces the impact unit. Through the above-mentioned setting, the sound collection hole 4 on the shell 1 can automatically track and face the position of the impact unit without manual adjustment, avoiding the problem that manual adjustment is not accurate, time-consuming and laborious.

[0045] Furthermore, in order to prevent the vibration of the test unit from interfering with the signal pickup process of the diaphragm 5, in this embodiment, damping material 7 is also provided at the position where the bottom of the first bracket 2 contacts the ground, and at the connection position between the first bracket 2 and the housing 1. The damping material 7 can be any damping material that can dissipate mechanical vibration energy, such as high-damping silica gel and high-damping rubber.

[0046] Furthermore, the impactor placement part includes a platform 12 and a baffle 13. To more realistically simulate the situation when an actual object falls, the platform 12 is tilted and the baffle 13 is set at the high end of the platform 12. The operator places the impactor body 11 on the platform 12 and closes to the baffle 13. After letting go, the impactor body 11 slides down along the platform 12 and has a certain initial speed when sliding down the lower end of the platform 12, which more realistically simulates the mode of actual heavy objects falling. Of course, a limit plate that can be automatically controlled to open and close can also be set on the platform 12 to simulate the human hand limiting the impactor body 11 near the baffle 13. After the limit plate is opened, the impactor body 11 slides down along the platform 12 and has a certain initial speed when sliding down the platform 12.

[0047] Furthermore, the impact unit also includes a second bracket 14, and the storage table 12 is fixed on the second bracket 14. The first bracket 2 and the second bracket 14 are both configured to be height-adjustable to meet the detection and impact requirements of different heights. In this embodiment, in order to make the bracket more stable and easy to carry and move, it is preferred that the first bracket 2 and the second bracket 14 are configured as foldable tripods.

[0048] Furthermore, a display 8 is provided on the outer wall of the housing 1 , and the display 8 is electrically connected to the evaluation system 6 for displaying the test results to the inspectors in a more intuitive and convenient manner.

[0049] Furthermore, the impactor body 11 is a solid steel sphere.

[0050] Furthermore, a distance meter 9 is also provided on the housing 1 for feeding back the distance between the sound collecting hole 4 and the ground when the height of the sound collecting hole 4 is adjusted.

[0051] Furthermore, the housing 1 is also provided with a power socket 10 for supplying power to the assessment system 6 and the display 8 .

[0052] Embodiment 2

[0053] like Figure 3 As shown, this embodiment provides a method for evaluating the impact sound pressure of a floor slab, adopting a cross-point test mode and applying the device of the first embodiment to perform the evaluation, comprising the following steps:

[0054] S01. Select the test object: select the upper and lower test structures, where the upper layer is the impact sound area, the middle is the floor to be assessed, and the lower layer is the noise detection area. Set 3 impact unit points, coded as ST01, ST02, and ST03, and 3 test unit points as TE01, TE02, and TE03;

[0055] S02: Place the test unit at point TE01 and the impact unit at point ST01;

[0056] Adjust the direction of the sound collection hole 4 of the test unit to face the ST01 point, and adjust the height of the first bracket 2 so that the sound collection hole 4 is 1.5m above the ground, keep the test unit stable and the damping material 7 of the first bracket 2 working normally;

[0057] Adjust the storage platform 12 of the impact unit to 0.05m from the ground, keep the second bracket 14 stable and the release port of the storage platform 12 working normally without any obstruction, and ensure that the surrounding environment is quiet;

[0058] S03: Start the test unit, place the impactor body 11 on the placement table 12 and fit it with the baffle 13, then release the impactor body 11, the impactor body 11 is accelerated by the inclination of the placement table 12, has a certain speed when reaching the release port, and falls through the release port;

[0059] S04: The test unit collects the impact noise through the sound collection hole 4, compares it with the preset threshold after signal conversion, and finally gives a measurement result of "yes" or "no";

[0060] S05: The test unit point remains unchanged, the impact unit point is changed, and S02-S04 are repeated until the tests of the impact unit points ST02 and ST03 are completed. When the test results of the three impact unit points are all "yes", the test result of the test unit point TE01 is determined to be "qualified";

[0061] S06: Adjust the test unit points, and repeat S02-S05 until the test of the test unit points TE02 and TE03 is completed. When the test results of the three test unit points are all "qualified", the test result is evaluated as qualified.

[0062] Embodiment 3

[0063] This embodiment provides a method for evaluating floor impact sound pressure, adopts a single-point test mode, applies the device in the first embodiment to perform the evaluation, and adopts the following steps:

[0064] S01. Select the test object: select the upper and lower test structures, where the upper layer is the impact sound area, the middle is the floor to be assessed, and the lower layer is the noise detection area. Set the impact unit point ST04 and the test unit point TE04;

[0065] S02: Place the test unit at point TE04 and the impact unit at point ST04;

[0066] Adjust the direction of the sound collection hole 4 of the test unit to face the ST04 point, and adjust the height of the first bracket 2 so that the sound collection hole 4 is 1.5m above the ground, keep the test unit stable and the damping material 7 of the first bracket 2 working normally;

[0067] Adjust the storage platform 12 of the impact unit to 0.05m from the ground, keep the second bracket 14 stable and the release port of the storage platform 12 working normally without any obstruction, and ensure that the surrounding environment is quiet;

[0068] S03: Start the test unit, place the impactor body 11 on the placement table 12 and fit it with the baffle 13, then release the impactor body 11, the impactor body 11 is accelerated by the inclination of the placement table 12, has a certain speed when reaching the release port, and falls through the release port;

[0069] S04: The test unit collects the impact noise through the sound collection hole 4, compares it with the preset threshold after signal conversion, and finally gives a measurement result of "yes" or "no", and records the measurement result;

[0070] S05: Repeat S03-S04 twice to obtain three measurement results at the same point. When all three measurement results are "yes", the test result is evaluated as qualified.

[0071] In the second and third embodiments, the height of the sound collecting hole 4 from the ground is set to 1.5m, which simulates the height of an average adult ear, and can also be adjusted according to actual needs. The height of the storage table 12 from the ground is set to 0.05m, and can also be set to other values ​​between 0.05-1m, but it is necessary to re-calibrate the control algorithm of the evaluation system 6 accordingly, and the height needs to be confirmed after standard test calibration based on the material, weight, shape and other parameters of the impact body 11.

[0072] Meanwhile, the test objects in the second and third embodiments may also be selected to have a structure with two layers, the upper layer being the noise detection area and the lower layer being the impact occurrence area, as well as horizontally arranged left and right structures.

[0073] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0074] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A floor impact sound pressure assessment device, characterized in that: It includes a test unit and an impact unit which are separately arranged; The test unit comprises a shell and a first bracket for supporting the shell, the shell is hinged on the first bracket through a horizontal X hinge axis and a longitudinal Y hinge axis, a sound collecting hole is arranged on the shell, a diaphragm facing the sound collecting hole and an evaluation system electrically connected to the diaphragm are arranged in the shell; The impact unit includes an impact object body and an impact object placement portion, the impact object body can fall from the impact object placement portion and impact the object to be tested; a signal transmitter is provided on the impact unit, and a signal receiver is provided on the shell, the signal receiver is used to receive the signal sent by the signal transmitter and obtain the position information of the signal transmitter, the shell is connected to the Y-axis motor through the Y-hinged axis, and is connected to the X-axis motor through the X-hinged axis, when the signal receiver receives the signal of the signal transmitter and obtains the position information, the X-axis motor and the Y-axis motor drive the shell to rotate so that the sound collection hole faces the impact unit; the diaphragm is attached to the sound collection hole.

2. The floor impact sound pressure assessment device according to claim 1, characterized in that: Damping materials are provided at the bottom end of the first bracket and at the connection position between the first bracket and the shell.

3. The device for evaluating floor impact sound pressure according to claim 2, characterized in that: The impactor placement portion includes an inclined placement platform and a baffle, wherein the baffle is arranged at the high end of the placement platform, and the impactor body falls from the low end of the placement platform.

4. The device for evaluating floor impact sound pressure according to claim 3, characterized in that: The impact unit also includes a second bracket, and the storage platform is fixed on the second bracket.

5. The floor impact sound pressure assessment device according to claim 4, characterized in that: The heights of the first bracket and the second bracket are both adjustable.

6. The floor impact sound pressure assessment device according to claim 1, characterized in that: It also includes a display arranged on the outer wall of the shell, and the display is electrically connected to the evaluation system.

7. The floor impact sound pressure assessment device according to claim 1, characterized in that: The impactor body is a solid steel sphere.

8. A method for evaluating floor impact sound pressure based on the floor impact sound pressure evaluation device according to claim 3, characterized in that: The following steps are included: S01: selecting a test object, and selecting a impact unit points and b test unit points according to the test object; S02: placing the test unit at one of the test unit points, adjusting the direction and height of the sound collection hole of the test unit to the specified requirements, and keeping the test unit stable and the damping material of the first bracket working normally; Placing the impact unit at one of the impact unit points, and adjusting the placement platform of the impact unit to a specified height; S03: starting the test unit, placing the impactor body on the placement table and fitting it to the baffle, and then releasing the impactor body, wherein the impactor body is accelerated by the inclination angle of the placement table and released through the release port; S04: The test unit collects the impact noise through the sound collection hole, compares it with the preset threshold after signal conversion, and finally gives a measurement result of "yes" or "no"; S05: The test unit point remains unchanged, the impact unit point is changed, and S02-S04 are repeated until the test of a impact unit points is completed. When the test results of a impact unit points are all "yes", the test result of the test unit point is determined to be "qualified"; S06: Adjust the test unit points, repeat S02-S05, until the test of b test unit points is completed. When the test results of b test unit points are all "qualified", the test result is evaluated as qualified.

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