Noise measuring device

Abstract

The invention discloses a noise measuring device which comprises a base, a detection support is installed on the base in a lifting mode, a support positioning structure is arranged on the base, supporting structures supporting each other are arranged between the bottom of the detection support and the base, the top of the detection support is sleeved with a supporting sleeve, and a plurality of supporting hanging rods are hinged to the periphery of the supporting sleeve. The supporting sleeve is provided with a limiting structure for limiting the maximum rotation angle of the supporting hanging rod, the supporting sleeve is provided with a locking structure locked with the detection support, the free end of the supporting hanging rod is provided with an externally-hung anemograph for detecting the wind speed, a noise meter and distance sensors, and the distance sensors are evenly distributed in the four directions of the supporting sleeve. A power supply assembly for driving the external anemograph, the noise meter and the distance sensor to operate is mounted on the supporting sleeve; the device can adjust the noise measurement height, detect whether echoes are generated around the device and detect whether the wind speed is suitable for noise measurement, so that the accuracy of noise measurement is ensured, and the practicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of noise detection, and in particular to a noise measuring device. Background Art

[0002] Noise is noise. Noise is the sound with irregular and chaotic frequency and strength changes of sound waves. In order not to disturb the surrounding residents, noise detection devices are placed in places where noise is frequently generated for real-time detection, such as factories and construction sites. During construction, the on-site noise conditions can be detected so that relevant measures can be taken in time to reduce the noise. Most of them use various types of noise detectors to measure the size of the noise.

[0003] The existing detection method is to manually build a detection bracket and then install the noise detector on the detection bracket. Since the detection bracket is at a fixed height, the effect of receiving noise during detection will be affected. If it is necessary to detect noise at a higher position, the detection personnel need to climb to a higher position and install the detection bracket to get closer to the measured position, which is very inconvenient to use and it is also necessary to measure the distance around the detection bracket during use to ensure that there is no reflection in order to effectively determine the measured position. This requires manual distance measurement with professional equipment and then position adjustment of the detection bracket. Since there will be wind blowing in the environment, when the wind speed is too high, it will hit the detection bracket and other objects and generate other noises, thereby affecting the accuracy of the detection. Summary of the invention

[0004] The technical problem to be solved by the present invention is: a noise measuring device, which can adjust the noise measurement height, detect whether echoes are generated around the detection device, detect whether the wind speed is suitable for noise measurement, ensure the accuracy of noise measurement, and improve practicality.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a noise measuring device, including a base, a detection bracket is installed on the base for lifting and lowering, the base is provided with a bracket positioning structure, a supporting structure supporting each other is provided between the bottom of the detection bracket and the base, a support sleeve is provided on the top of the detection bracket, a plurality of supporting hanging rods are hinged around the support sleeve, a limiting structure for limiting the rotation of the supporting hanging rod to a supporting state is provided on the support sleeve, a locking structure for mutually locking with the detection bracket is provided on the support sleeve, an external anemometer, a noise meter and a distance sensor for detecting wind speed are provided at the free end of the support hanging rod, the distance sensors are evenly distributed in four directions of the support sleeve, and a power supply component for driving the external anemometer, noise meter and distance sensor to operate is installed on the support sleeve.

[0006] As a preferred solution, the support hanging rod is provided with a card slot extending along the extending direction of the support hanging rod, and a corresponding card block is slidably installed in the card slot, and the card block is connected with a corresponding fixing plate for installing the external anemometer, noise meter and distance sensor, and a plurality of fixing holes are opened on the support hanging rod, and the card block for installing the noise meter and distance sensor is fixed to the support hanging rod through a fixing pin shaft, and the card block for installing the external anemometer is fixed to the support hanging rod through a threaded connection.

[0007] As a preferred solution, the limiting structure includes a lower limiting plate and an upper limiting plate fixedly mounted on the support sleeve, the lower limiting plate corresponds to the bottom of the support hanging rod, and an upper top block corresponding to the upper limiting plate is provided at the rotation position of the support hanging rod.

[0008] As a preferred solution, the locking structure includes an outer locking hole on the support sleeve, an inner locking hole on the detection bracket, and a locking pin passing through the outer locking hole and the inner locking hole. A support sleeve positioning structure is also provided between the support sleeve and the detection bracket for convenient positioning and installation.

[0009] As a preferred solution, the detection bracket includes several sections of detection bracket rods, which are slidably installed in sequence, and the detection bracket rods are provided with several one-to-one corresponding adjustment holes, and the detection bracket rods are fixed by adjustment pins passing through the adjustment holes.

[0010] As a preferred solution, the support structure includes a plurality of support rods hingedly mounted on the detection bracket rod, the support rods are evenly distributed and mounted on the detection bracket rod, the base is provided with support seats corresponding to the support rods one by one, and the support rods and the support seats are fixed by support pins.

[0011] As a preferred solution, the power supply assembly includes a running battery fixedly mounted on a support sleeve, and a solar power generation panel is also provided above the support sleeve for conveniently powering the running battery or directly powering an external anemometer, noise meter and distance sensor.

[0012] As a preferred solution, the fixing plate of the distance sensor is rotatably mounted on the clamping block.

[0013] As a preferred solution, the bracket positioning structure includes a bracket rod accommodating groove fixedly mounted on the base.

[0014] After adopting the above technical scheme, the effect of the present invention is as follows: since the noise measuring device includes a base, a detection bracket is installed on the base for lifting and lowering, a bracket positioning structure is provided on the base, a supporting structure supporting each other is provided between the bottom of the detection bracket and the base, a supporting sleeve is provided on the top of the detection bracket, a plurality of supporting hanging rods are hinged around the support sleeve, a limiting structure for limiting the rotation of the supporting hanging rod to a supporting state is provided on the support sleeve, a locking structure that is mutually locked with the detection bracket is provided on the support sleeve, an external anemometer, a noise meter and a distance sensor for detecting wind speed are provided at the free end of the support hanging rod, and the distance sensors are evenly distributed on the support sleeve. In the four directions, the support sleeve is equipped with a power supply component for driving the external anemometer, noise meter and distance sensor to operate; first, the height of the detection bracket is adjusted to make the support sleeve at a suitable height, and then the power supply component drives the distance sensor to perform distance detection to ensure that the device is in a suitable position for detecting noise, and then the external anemometer is driven to perform wind speed detection to ensure that the wind speed is within the appropriate noise detection range, and the noise meter starts to measure noise for a period of time; the device can adjust the noise measurement height, and whether an echo is generated around the detection device, and detect whether the wind speed is suitable for noise measurement, thereby ensuring the accuracy of noise measurement and improving practicality.

[0015] Furthermore, since the support hanging rod is provided with a card slot extending along the extending direction of the support hanging rod, a corresponding card block is slidably installed in the card slot, and the card block is connected with a corresponding fixing plate for installing the external anemometer, noise meter and distance sensor, and a plurality of fixing holes are opened on the support hanging rod, and the card block for installing the noise meter and distance sensor is fixed to the support hanging rod through a fixing pin shaft, and the card block for installing the external anemometer is fixed to the support hanging rod through a threaded connection; in this way, when installing the fixing plate, the card block is inserted into the card slot and slides to a suitable position of the support hanging rod and has a corresponding fixing hole, and then the fixing pin shaft is passed through the fixing hole to fix it, thereby completing the installation of the fixing plate, with a simple structure, convenient disassembly and assembly, and improved portability.

[0016] Furthermore, since the limiting structure includes a lower limiting plate and an upper limiting plate fixedly mounted on the supporting sleeve, the lower limiting plate corresponds to the bottom of the supporting hanging rod, and an upper top block corresponding to the upper limiting plate is provided at the rotating position of the supporting hanging rod, ensuring that the supporting hanging rod can be effectively limited after rotation, so that the supporting hanging rod can be accurately in the appropriate orientation, thereby enabling the installation of external anemometers, noise meters and distance sensors.

[0017] Since the locking structure includes an outer locking hole on the support sleeve, an inner locking hole on the detection bracket and a locking pin shaft passing through the outer locking hole and the inner locking hole, a support sleeve positioning structure for convenient positioning and installation is also provided between the support sleeve and the detection bracket; the support sleeve can be quickly put on the detection bracket through the support sleeve positioning structure, and the support sleeve and the detection bracket can be locked by passing the locking pin shaft through the outer locking hole and the inner locking hole, thereby avoiding the risk of the support sleeve falling off due to excessive wind speed and ensuring the firmness of the installation.

[0018] Furthermore, since the detection bracket includes a plurality of detection bracket rods, the detection bracket rods are sequentially inserted and slid, and a plurality of one-to-one corresponding adjustment holes are opened on the detection bracket rods, and the detection bracket rods are fixed by adjustment pins passing through the adjustment holes; the detection brackets are sequentially inserted, so that different heights can be adjusted, and further fixation can be completed by adjusting the pins, so that the structure is simple and reliable during assembly, and it is convenient to install and disassemble.

[0019] Furthermore, since the support structure includes a plurality of support rods hingedly mounted on the detection bracket rod, the support rods are evenly distributed and mounted on the detection bracket rod, and the base is provided with support seats corresponding to the support rods one by one, and the support rods and the support seats are fixed by support pins; after the support rods and the support seats are fixed by the support pins, the support rods will form mutual support with the detection bracket rod, and a plurality of support rods are provided, so that the detection bracket rod can be effectively supported and fixed, so that the detection bracket rod can be stably mounted on the base.

[0020] Furthermore, since the power supply assembly includes an operating battery fixedly mounted on the support sleeve, a solar power generation panel is also provided above the support sleeve for conveniently powering the operating battery or directly powering an external anemometer, noise meter and distance sensor; the operating battery can effectively power the external anemometer, noise meter and distance sensor to operate, and the solar power generation panel can further save the use of operating batteries.

[0021] Furthermore, since the fixing plate of the distance sensor is rotatably mounted on the clamping block, the orientation of the distance sensor can be changed by rotating the fixing plate, thereby improving the flexibility of the distance sensor during measurement.

[0022] Furthermore, because the bracket positioning structure includes a bracket rod accommodating groove fixedly mounted on the base, the detection bracket rod can be quickly installed on the base, thereby improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 is a stereogram of an embodiment of the present invention;

[0025] Figure 2 is a schematic top view of an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 Section view at AA;

[0027] Figure 4 yes Figure 3 A partial enlarged view of point A;

[0028] In the attached drawings: 1, base; 2, bracket rod receiving groove; 3, first detection bracket rod; 4, second detection bracket rod; 5, third detection bracket rod; 6, support rod; 7, support seat; 8, support pin; 9, retaining edge; 10, adjustment hole; 11, adjustment pin; 12, boss; 13, support sleeve; 131, rectangular block groove; 132, cylindrical groove; 14, support hanging rod; 141, upper top block; 15, lower limit plate; 1 6. Upper limit plate; 17. Slot; 18. Fixing hole; 19. Clamping block; 20. Fixing plate; 21. Fixing pin; 22. Fixing slot; 23. Threaded slot; 24. Stud bolt; 25. Nut; 26. External locking hole; 27. Internal locking hole; 28. Locking pin; 29. ​​Damping shaft; 30. Operating battery; 31. Solar panel; 32. External anemometer; 33. Noise meter; 34. Distance sensor. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific examples.

[0030] like Figures 1 to 4 As shown, a noise measuring device comprises a base 1, on which a detection bracket is installed for lifting and lowering, a bracket positioning structure is provided on the base 1, a supporting structure supporting each other is provided between the bottom of the detection bracket and the base 1, a supporting sleeve 13 is provided on the top of the detection bracket, a plurality of supporting hanging rods 14 are hinged around the support sleeve 13, a limiting structure for limiting the rotation of the supporting hanging rod 14 to a supporting state is provided on the support sleeve 13, a locking structure for mutually locking with the detection bracket is provided on the support sleeve 13, an external anemometer 32 for detecting wind speed, a noise meter 33 and a distance sensor 34 are provided on the free end of the support hanging rod 14, and the distance sensors 34 are evenly distributed in four directions of the support sleeve 13, and a power supply component for driving the external anemometer 32, the noise meter 33 and the distance sensor 34 to operate is installed on the support sleeve 13.

[0031] In this embodiment, six support rods 14 are provided on the support sleeve 13, and the six support rods 14 are evenly hinged and distributed on the support sleeve 13; the support rod 14 switches between vertical and horizontal states around the hinge, and when the support rod 14 is in the horizontal state, the limiting structure is limited, and the limiting structure includes a lower limiting plate 15 and an upper limiting plate 16 fixedly mounted on the support sleeve 13, and the lower limiting plate 15 corresponds to the bottom of the support rod 14, and an upper top block 141 corresponding to the upper top plate 16 is provided at the rotation point of the support rod 14; in this way, the lower limiting plate 15 can effectively support the lower bottom of the support rod 14, and the upper top block 141 at the rotation point of the support rod 14 will also contact and limit with the upper top plate 16, thereby forming a double limit, which effectively ensures the firmness and accuracy of the support.

[0032] In this embodiment, the external anemometer 32, noise meter 33 and distance sensor 34 are all existing commercially available devices, and therefore are not described in detail herein.

[0033] like Figure 1 and Figure 3As shown, the support hanging rod 14 is provided with a card slot 17 extending along the extending direction of the support hanging rod 14, and a corresponding card block 19 is slidably installed in the card slot 17. The card block 19 is connected with a corresponding fixing plate 20 for installing the external anemometer 32, the noise meter 33 and the distance sensor 34. A plurality of fixing holes 18 are opened on the support hanging rod 14, and the card block 19 for installing the noise meter 33 and the distance sensor 34 is connected to the support hanging rod 14 through a fixing pin shaft 21. The card block 19 for installing the external anemometer 32 is connected to the support hanging rod 14 through a threaded connection. The support rod 14 is fixed; the support rod 14 is made of profile, which is convenient for cutting and use. The card slot 17 is in the shape of an inverted trapezoid, and the corresponding card block 19 is also in the shape of an inverted trapezoid, so that it can be directly stuck during card installation to ensure that it will not fall off. At the same time, the card slot 17 can also be used to store the wire harness. For example, the tail of the distance sensor 34 has a section of wire harness that can be in the card slot 17, which is more practical and improves the aesthetics. After the card installation is completed, the position of the fixing plate 20 can be adjusted on the support rod 14 to adapt to different test requirements. Since a number of fixing holes 18 are opened on the support rod 14, the adjustment After the position is reached, the fixing pin 21 is connected or threadedly connected to the fixing hole 18 to fix the position of the fixing plate 20. Since the card slots 17 for installing the noise meter 33 and the distance sensor 34 are all set downward, the fixing holes 18 are opened upward, so that only the corresponding fixing slots 22 are also opened on the card block 19, and then the fixing pin 21 passes through the fixing hole 18 and falls on the fixing slot 22 to complete the fixation. The structure is simple and easy to install without the help of tools; the external anemometer 32 needs to be installed above the support hanging rod 14, so the support hanging rod with the external anemometer 32 is installed The slot 17 of the rod 14 is arranged upward, so the fixing hole 18 is opened downward, and the fixing slot 22 on the card-mounting block 19 in the slot 17 of the supporting hanging rod 14 corresponding to the external anemometer 32 is installed is a threaded slot 23, which is extended into the fixing hole 18 and connected with the threaded slot 23 through a stud bolt 24, and then the other side of the stud bolt 24 is tightened and pressed against the bottom of the supporting hanging rod 14 through a nut 25, so that the installation of the external anemometer 32 can be completed. Since only simple fixing is required during installation, the installation can be completed by hand tightening, which is convenient to install and avoids the problem of being unable to assemble due to lack of suitable tools during installation, which affects the measurement.

[0034] like Figure 3As shown, the locking structure includes an outer locking hole 26 formed on the support sleeve 13, an inner locking hole 27 on the detection bracket, and a locking pin 28 passing through the outer locking hole 26 and the inner locking hole 27. A support sleeve 13 positioning structure for convenient positioning and installation is also provided between the support sleeve 13 and the detection bracket. After the support sleeve 13 is mounted on the detection bracket, the external factors are complex and there is a risk of the support sleeve 13 falling off. Therefore, the locking pin 28 passes through the outer locking hole 26 and the inner locking hole 27 to complete the locking. Since the noise measurement needs to last for a period of time and also needs to take into account the characteristics of convenient disassembly and assembly, the locking pin 28 can ensure that the installation is firm and convenient disassembly and assembly are convenient.

[0035] The positioning structure of the support sleeve 13 includes a boss 12 opened on the top of the detection bracket, and the boss 12 includes a layer of rectangular blocks and a layer of cylinders. The support sleeve 13 is correspondingly provided with a rectangular block groove 131 and a cylindrical groove 132, which further facilitates positioning and installation, and can also deepen the depth of the set to ensure the stability of the set.

[0036] Furthermore, the detection bracket includes several sections of detection bracket rods, and the detection bracket rods are sequentially inserted and slid. The detection bracket rods are provided with several one-to-one corresponding adjustment holes 10, and the detection bracket rods are fixed by adjusting pins 11 passing through the adjustment holes 10; the detection bracket rods include a first detection bracket rod 3, a second detection bracket rod 4 and a third detection bracket rod 5. After the noise is generated, the measurement effect received is different due to different heights, so it is necessary to adjust the height for accurate and effective measurement. The second detection bracket rod 4 is inserted into the first detection bracket rod 3, and the third detection bracket rod 5 is inserted into the second detection bracket rod 4. The tops of the second detection bracket rod 4 and the third detection bracket rod 5 are both provided with a rib 9, and the rib 9 can effectively prevent the second detection bracket rod 4 from falling into the first detection bracket rod 3 and the third detection bracket rod 5 from falling into the second detection bracket rod 4. Because the noise measurement needs to last for a period of time and it is also necessary to take into account the characteristics of convenient disassembly and assembly, the adjusting pin 11 can ensure that the installation is firm and convenient disassembly and assembly.

[0037] like Figure 1As shown, the support structure includes a plurality of support rods 6 hingedly mounted on the first detection bracket rod 3, the support rods 6 are evenly distributed and mounted on the first detection bracket rod 3, and the base 1 is provided with support seats 7 corresponding to the support rods 6 one by one, and the support rods 6 and the support seats 7 are fixed by support pins 8; since the first detection bracket rod 3, the second detection bracket rod 4 and the third detection bracket rod 5 can be raised and lowered, a support sleeve 13 is mounted on the third detection bracket, so that the first detection bracket rod 3 needs to be effectively supported when it is installed on the base 1, and the first detection bracket rod 3 There are four support rods 6 evenly hingedly distributed on the top. When the support rod 6 is not in use, it rotates around the hinge point and is parallel to the first detection bracket rod 3. This can effectively reduce the space occupied and has a certain convenience. When performing support installation, it is only necessary to position and install the first detection bracket rod 3 through the bracket positioning structure, and then the support rod 6 is rotated around the hinge point to make the free end of the support rod 6 rotate to the corresponding support seat 7 on the base 1, and then it is fixed by the support pin 8. In this way, the support rod 6 cannot rotate, so that the base 1 and the first detection bracket are effectively fixed, thereby improving the firmness of the installation.

[0038] The above-mentioned support pin 8, adjustment pin 11, fixing pin 21, locking pin 28, etc. can help to quickly install the noise measurement device, and have a certain firmness to meet the measurement within a period of time, and can also be easily disassembled to improve practicality.

[0039] Furthermore, the power supply assembly includes an operating battery 30 fixedly mounted on the support sleeve 13, and a solar panel 31 is provided above the support sleeve 13 for conveniently powering the operating battery 30 or directly powering an external anemometer 32, a noise meter 33 and a distance sensor 34. The operating battery 30 is fixedly mounted on the side wall of the support sleeve 13, which effectively saves space. The solar panel 31 covers the support sleeve 13. Since the support rod 6 is in a horizontal state when supporting, the support rod 6 forms a supporting surface around it, and the solar panel 31 can cover the support sleeve 13. When outdoors, the solar panel 31 can power the external anemometer 32, the noise meter 33 and the distance sensor 34, saving energy consumption.

[0040] like Figure 4As shown, the fixed plate 20 of the distance sensor 34 is rotatably mounted on the clamping block 19; since the six support hanging rods 14 are evenly hinged and distributed on the support sleeve 13, the installed distance sensor 34 is also at a fixed angle. Since the measurement environment is an uncertain factor, the direction of the distance sensor 34 is changed by rotating the fixed plate 20, and during use, the fixed plate 20 is rotatably mounted on the clamping block 19 through the damping shaft 29, so that it can be rotated and the direction can be determined to adapt to measurements in different environments; in this embodiment, the damping shaft 29 is an existing structure that can be purchased on the market, so it is not described in detail in the text.

[0041] In this embodiment, the bracket positioning structure includes a bracket rod accommodating groove 2 fixedly mounted on the base 1; this enables the first detection bracket rod 3 to be quickly installed and has a certain degree of support.

[0042] The working principle of this embodiment is as follows: first, pull the second detection bracket rod 4 and the third detection bracket rod 5 to determine the appropriate height of the support sleeve 13, and then complete the height adjustment by adjusting the pin shaft 11 through the adjustment hole 10, and then power the distance sensor 34 and the external anemometer 32 through the operating battery 30 or the solar panel 31. The detection personnel detect the distance through the distance sensor 34 to place the device at a suitable test location, and then use the external anemometer 32 to detect whether the wind speed meets the noise measurement conditions, and the noise meter 33 starts to measure the noise.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A noise measuring device, comprising a base, characterized in that: A detection bracket is installed on the base for lifting and lowering, a bracket positioning structure is provided on the base, a supporting structure supporting each other is provided between the bottom of the detection bracket and the base, a support sleeve is provided on the top of the detection bracket, a plurality of supporting hanging rods are hinged around the support sleeve, a limiting structure for limiting the rotation of the supporting hanging rod to a supporting state is provided on the support sleeve, a locking structure that is mutually locked with the detection bracket is provided on the support sleeve, an external anemometer, a noise meter and a distance sensor for detecting wind speed are provided at the free end of the support hanging rod, and the distance sensors are evenly distributed in four directions of the support sleeve, and a power supply component for driving the external anemometer, noise meter and distance sensor to operate is installed on the support sleeve.

2. A noise measuring device as claimed in claim 1, characterized in that: The support hanging rod is provided with a card slot extending along the extending direction of the support hanging rod, and a corresponding card block is slidably installed in the card slot, and the card block is connected with a corresponding fixing plate for installing the external anemometer, noise meter and distance sensor. The support hanging rod is provided with a plurality of fixing holes, and the card block for installing the noise meter and distance sensor is fixed to the support hanging rod through a fixing pin shaft, and the card block for installing the external anemometer is fixed to the support hanging rod through a threaded connection.

3. A noise measuring device as claimed in claim 2, characterized in that: The limiting structure comprises a lower limiting plate and an upper limiting plate fixedly mounted on the supporting sleeve, wherein the lower limiting plate corresponds to the bottom of the supporting hanging rod, and an upper top block corresponding to the upper limiting plate is provided at the rotating position of the supporting hanging rod.

4. A noise measuring device as claimed in claim 3, characterized in that: The locking structure includes an outer locking hole on the support sleeve, an inner locking hole on the detection bracket, and a locking pin passing through the outer locking hole and the inner locking hole. A support sleeve positioning structure is also provided between the support sleeve and the detection bracket for convenient positioning and installation.

5. A noise measuring device as claimed in claim 4, characterized in that: The detection bracket comprises a plurality of detection bracket rods, which are fitted and slid in sequence. The detection bracket rods are provided with a plurality of one-to-one corresponding adjustment holes, and the detection bracket rods are fixed by adjustment pins passing through the adjustment holes.

6. A noise measuring device as claimed in claim 5, characterized in that: The support structure includes a plurality of support rods hingedly mounted on the detection bracket rod, the support rods are evenly distributed and mounted on the detection bracket rod, the base is provided with support seats corresponding to the support rods one by one, and the support rods and the support seats are fixed by support pins.

7. A noise measuring device as claimed in claim 6, characterized in that: The power supply assembly includes a running battery fixedly mounted on the support sleeve, and a solar power generation panel is also provided above the support sleeve for conveniently supplying power to the running battery or directly supplying power to an external anemometer, noise meter and distance sensor.

8. A noise measuring device as claimed in claim 7, characterized in that: The fixed plate of the distance sensor is rotatably mounted on the clamping block.

9. A noise measuring device as claimed in claim 8, characterized in that: The support positioning structure comprises a support rod accommodating groove fixedly mounted on the base.

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