Noise measuring device for safety evaluation

Abstract

The utility model relates to the field of safety evaluation, in particular to a noise measuring device for safety evaluation, which comprises a movable base, a main body for bearing a noise measuring component in safety evaluation, and a case arranged above the movable base and used for driving the measuring component to steer. The noise measuring device is provided with the first bevel gear, the second bevel gear, the working table, the side collecting frames, the supporting rods, the fixing frame and the noise collecting microphone, when the noise measuring device is used, the side collecting frames can be installed on the working table through studs according to the current safety evaluation requirement, and the noise collecting microphone is arranged on the working table. A plurality of noise collecting microphones can be installed on the fixing frame on the side collecting frame, so that the noise collecting microphones form a multi-microphone array around the workbench, and sound signals are received through the noise collecting microphones at the same time and transmitted to the noise measuring instrument through the connecting line to be processed. And the directivity and accuracy of noise measurement can be further improved.

Description

Technical Field

[0001] The utility model relates to the field of safety evaluation, in particular to a noise measuring device used for safety evaluation. Background Art

[0002] Safety assessment, also known as "hazard assessment" or "risk assessment", is an important part of safety system engineering. It aims to identify and analyze dangerous and harmful factors in engineering, systems, production and operation activities by applying the principles and methods of safety system engineering, predict the possibility and severity of accidents or occupational hazards, and then propose scientific, reasonable and feasible safety countermeasures and measures, and make evaluation conclusions. Noise measurement is also a type of safety assessment. The noise measurement device in safety assessment, that is, noise detection equipment, is an instrument used to measure the noise level in the environment. These devices play an important role in protecting personnel health, evaluating environmental quality and complying with relevant laws and regulations.

[0003] After searching, a noise and vibration measuring device with publication number CN215114840U was found, which specifically discloses a noise and vibration measuring device, including a device body, the outer surface of the device body is provided with a hole, the inner wall of the hole is provided with a connecting strip, the outer surface of the connecting strip is provided with a No. 1 bolt hole, the outer surface of the connecting strip is provided with a fixing frame, the interior of the fixing frame is provided with a dust filter, the outer surface of the fixing frame is provided with a No. 2 bolt hole, the interior of the No. 2 bolt hole is provided with a fixing bolt, the upper end outer surface of the device body is provided with a storage groove, the inner wall of the storage groove is provided with a sponge pad, one side of the storage groove is provided with a connecting hole, the upper end of the device body is provided with a cover plate, and the outer surface of the cover plate is provided with a connecting column. The noise and vibration measuring device described in the utility model, the dust filter can prevent dust and debris from entering the interior of the device through the heat dissipation holes when the device is in use, making it convenient to store and carry the power cord to avoid loss.

[0004] When existing noise measurement devices are used in safety assessment environments, due to the wide range of noise sources, they rely solely on the noise measurement device's own listening hole to collect and measure noise. Such measurement results are not only low in precision, but also reduce the noise direction and accuracy. In addition, the noise measurement devices in the above-mentioned comparative cases also lack methods to expand the noise collection range and improve measurement accuracy. Such long-term use will pose a safety threat to the measurement results presented by the noise measurement devices, making the devices unsuitable for safety assessment environments.

[0005] Therefore, it is necessary to invent a noise measurement device for safety evaluation to solve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to provide a noise measuring device for safety evaluation, which improves the measurement precision and accuracy of the noise measuring device through the first bevel gear, the second bevel gear, the workbench, the side collection frame, the support rod, the fixing frame and the noise collecting microphone, expands the noise collection range, ensures the accuracy of the measurement results presented by the noise measuring device, and makes the device better suitable for the effect in the safety evaluation environment, so as to solve the problem that when the noise measuring device in the prior art is used in the safety evaluation environment, due to the wide range of noise sources, it only relies on the listening hole of the noise measuring device itself to collect and measure the noise, such measurement results are not only of low accuracy, but also have reduced noise direction and accuracy. In addition, the noise measuring device in the above-mentioned comparative case also lacks a method to expand the noise collection range and improve measurement precision. Such long-term use will pose a safety threat to the measurement results presented by the noise measuring device, making the device unsuitable for the problem in the safety evaluation environment.

[0007] In order to achieve the above-mentioned object, the present utility model provides the following technical solutions: a noise measurement device for safety evaluation, comprising a mobile base for carrying a main body of a noise measurement component in safety evaluation;

[0008] The chassis is arranged above the mobile base and is used to drive the measuring assembly to turn, and a rotating handle is provided on the outside of the chassis, a connecting rod is fixedly installed on one side of the rotating handle, a first bevel gear is provided on the outside of the connecting rod, a second bevel gear is movably connected to one side of the first bevel gear, a transmission rod is fixedly installed inside the second bevel gear, and a workbench is fixedly installed on the top of the transmission rod;

[0009] A noise meter is provided above the workbench and is used to detect the collected noise. A front display screen is fixedly mounted on the outside of the noise meter. A stud bolt is passed through the top of the workbench. One end of the stud bolt is movably connected to a side collection rack. A hexagonal nut is provided on the outside of the stud bolt.

[0010] A rotating shaft is provided at one end of the side collection frame and is used to connect and install the support rod, and a threaded groove is provided on the outside of the support rod, a threaded rod is fixedly installed inside the threaded groove, a fixing frame is fixedly installed at one end of the threaded rod, a noise collection microphone is provided inside the fixing frame, and a connecting wire is fixedly connected to the bottom of the noise collection microphone.

[0011] Preferably, the workbench is movably connected to the chassis, and the first bevel gear is meshed with the second bevel gear.

[0012] Preferably, the number of the side collecting racks is set to four, and the four side collecting racks are distributed at equal intervals on the workbench.

[0013] Preferably, a telescopic cylinder is provided below the support rod, and one end of the telescopic cylinder is movably connected to a movable frame.

[0014] Preferably, a torsion spring is provided inside the fixing frame, and a first fixing clip is fixedly mounted on one end of the torsion spring.

[0015] Preferably, an interference screw penetrates the outside of the fixing frame, and a second fixing clip is fixedly installed on one end of the interference screw.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] 1. The utility model is provided with a first bevel gear, a second bevel gear, a workbench, a side collecting frame, a support rod, a fixing frame and a noise collecting microphone. When the noise measuring device is used, multiple sets of side collecting frames can be installed on the workbench by stud bolts according to the needs of the current safety evaluation. The fixing frames on the side collecting frames can be installed with multiple noise collecting microphones. In this way, multiple noise collecting microphones form a multi-microphone array around the workbench. The multiple noise collecting microphones simultaneously receive sound signals and transmit them to the noise measuring instrument for processing through connecting lines, which can further improve the directionality and accuracy of noise measurement. In addition, the angle of the workbench can be adjusted by meshing the first bevel gear and the second bevel gear, thereby expanding the noise measurement range in the safety evaluation. In this way, the measurement precision and accuracy of the noise measuring device are improved, the noise collection range is expanded, and the accuracy of the measurement results presented by the noise measuring device is guaranteed, so that the device is better suitable for safety evaluation environments.

[0018] 2. The utility model is provided with a fixing frame, a torsion spring, a first fixing clip, a contact screw, a second fixing clip and a noise collecting microphone. When the noise measuring device is used, the noise collecting microphone can be directly inserted into the first fixing clip of the fixing frame, and the second fixing clip is made to contact the other side of the noise collecting microphone by twisting the contact screw, thereby fixing the noise collecting microphone. This not only meets the installation requirements of noise collecting microphones of different sizes, but also when the noise collecting microphone encounters external vibrations while collecting noise, the first fixing clip can drive the torsion spring to expand and contract, thereby performing buffering and shock absorption, ensuring the stability of the noise collecting microphone, reducing the impact of external factors on the noise collecting microphone, and improving the accuracy of noise collection by the noise collecting microphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the first bevel gear structure of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of the noise measuring instrument of the present utility model;

[0023] Figure 4 This is a schematic diagram of the support rod structure of the utility model;

[0024] Figure 5 This is a schematic diagram of the noise collection microphone structure of the present invention.

[0025] Description of reference numerals:

[0026] 1. Mobile base; 2. Chassis; 3. Rotating handle; 4. Connecting rod; 5. First bevel gear; 6. Second bevel gear; 7. Transmission rod; 8. Workbench; 9. Noise meter; 10. Front display; 11. Stud bolt; 12. Side collection rack; 13. Hexagonal nut; 14. Rotating shaft; 15. Support rod; 16. Telescopic cylinder; 17. Movable rack; 18. Threaded groove; 19. Threaded rod; 20. Fixed bracket; 21. Torsion spring; 22. First fixing clamp; 23. Resistance screw; 24. Second fixing clamp; 25. Noise collection microphone; 26. Connecting wire. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] The utility model provides Figure 1-5 A noise measurement device for safety evaluation is shown, comprising a mobile base 1 for carrying the main body of the noise measurement component in the safety evaluation;

[0029] The chassis 2 is arranged above the mobile base 1 and is used to drive the measuring component to turn. A rotating handle 3 is provided on the outside of the chassis 2. A connecting rod 4 is fixedly installed on one side of the rotating handle 3. A first bevel gear 5 is provided on the outside of the connecting rod 4. A second bevel gear 6 is movably connected to one side of the first bevel gear 5. A transmission rod 7 is fixedly installed inside the second bevel gear 6. A workbench 8 is fixedly installed on the top of the transmission rod 7.

[0030] A noise meter 9 is provided above the workbench 8 and is used to detect the collected noise. A front display screen 10 is fixedly mounted on the outside of the noise meter 9. A stud bolt 11 passes through the top of the workbench 8. One end of the stud bolt 11 is movably connected to a side collection frame 12. A hexagonal nut 13 is provided on the outside of the stud bolt 11.

[0031] The rotating shaft 14 is arranged at one end of the side collection frame 12 and is used to connect and install the support rod 15, and a threaded groove 18 is provided on the outside of the support rod 15, and a threaded rod 19 is fixedly installed inside the threaded groove 18, and a fixing frame 20 is fixedly installed at one end of the threaded rod 19. A noise collection microphone 25 is provided inside the fixing frame 20, and a connecting line 26 is fixedly connected to the bottom of the noise collection microphone 25. The fixing frame 20 on the side collection frame 12 can be installed with multiple noise collection microphones 25, so that the multiple noise collection microphones 25 form a multi-microphone array around the workbench 8. The multiple noise collection microphones 25 simultaneously receive sound signals and transmit them to the noise measuring instrument 9 for processing through the connecting line 26, which can further improve the directionality and accuracy of the noise measurement.

[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, the workbench 8 is movably connected to the chassis 2, and the first bevel gear 5 is meshed with the second bevel gear 6. The angle of the workbench 8 is adjusted by the meshing of the first bevel gear 5 and the second bevel gear 6, thereby expanding the noise measurement range in the safety evaluation. The number of side collection frames 12 is set to four, and the four side collection frames 12 are evenly spaced on the workbench 8. Multiple groups of side collection frames 12 are installed on the workbench 8 by stud bolts 11. The fixing frame 20 on the side collection frame 12 can be installed with multiple noise collection microphones 25, so that the multiple noise collection microphones 25 form a multi-microphone array around the workbench 8.

[0033] like Figure 1 、 Figure 4 and Figure 5As shown, a telescopic cylinder 16 is provided below the support rod 15, and one end of the telescopic cylinder 16 is movably connected to a movable frame 17. The telescopic cylinder 16 cooperates with the rotating shaft 14 to adjust the up and down angles of the support rod 15 according to the current noise collection requirements, thereby meeting different noise collection requirements. A torsion spring 21 is provided inside the fixing frame 20, and a first fixing clamp 22 is fixedly installed at one end of the torsion spring 21. When the noise collecting microphone 25 encounters external vibration while collecting noise, the first fixing clamp 22 can drive the torsion spring 21 to retract and retract, thereby performing buffering and shock absorption. An interference screw 23 is passed through the outside of the fixing frame 20, and a second fixing clamp 24 is fixedly installed at one end of the interference screw 23. The noise collecting microphone 25 can be directly inserted into the first fixing clamp 22 of the fixing frame 20, and the interference screw 23 is twisted to make the second fixing clamp 24 contact the other side of the noise collecting microphone 25, thereby fixing the noise collecting microphone 25, thereby meeting the installation requirements of noise collecting microphones 25 of different sizes.

[0034] The working principle of the utility model is as follows: first, the device is pushed to the environment where a safety assessment is required by moving the base 1, then the external power supply is turned on, and multiple sets of side collection frames 12 are installed on the workbench 8 through the stud bolts 11, and then the switch of the telescopic cylinder 16 is turned on. The telescopic cylinder 16 cooperates with the rotating shaft 14 to adjust the up and down angles of the support rod 15 according to the current noise collection requirements, and then the noise collection microphone 25 can be directly inserted into the first fixing clamp 22 of the fixing frame 20, and the second fixing clamp 24 is twisted to contact the other side of the noise collection microphone 25 by twisting the abutting screw 23, thereby fixing the noise collection microphone 25. This not only meets the installation requirements of noise collection microphones 25 of different sizes, but also when the noise collection microphone 25 encounters external vibrations while collecting noise, the first fixing clamp 22 can drive the torsion spring 21 to expand and contract, thereby buffering and reducing shock, ensuring the stability of the noise collection microphone 25, and at the same time, multiple noise collection microphones 25 form a multi-microphone array around the workbench 8, and multiple noise collection microphones 25 simultaneously receive sound signals and transmit them to the noise collector through the connecting line 26. The measuring instrument 9 is used for processing, which can further improve the directionality and accuracy of noise measurement. After the preparation work is completed, the noise measuring instrument 9 can be started to measure the noise. During the measurement process, the rotating handle 3 can be twisted to rotate the first bevel gear 5 and the second bevel gear 6 to adjust the angle of the workbench 8, thereby expanding the noise measurement range in the safety evaluation and facilitating more accurate noise measurement direction. The noise is then transmitted to the noise measuring instrument 9 through the noise collection microphone 25 and the connecting line 26. Then, the noise measuring instrument 9 displays the results on the front display screen 10 after measurement and detection, which is convenient for external operators to record. This improves the measurement precision and accuracy of the noise measuring device, expands the noise collection range, ensures the accuracy of the measurement results presented by the noise measuring device, and makes the device better suitable for safety evaluation environments. Finally, after completing the installation and use of all noise measuring devices according to the above operations, turn off the switch of the noise measuring instrument 9, turn off the switch of the telescopic cylinder 16, and cut off the external power supply if it is not used for a long time. In this way, the use process of the noise measuring device for safety evaluation is completed.

[0035] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A noise measurement device for safety assessment, characterized in that: include A mobile base (1) for carrying the main body of the noise measurement component in the safety evaluation; A chassis (2) is arranged above the mobile base (1) and is used to drive the measuring component to turn, and a rotating handle (3) is provided on the outside of the chassis (2), a connecting rod (4) is fixedly installed on one side of the rotating handle (3), a first bevel gear (5) is provided on the outside of the connecting rod (4), a second bevel gear (6) is movably connected to one side of the first bevel gear (5), a transmission rod (7) is fixedly installed inside the second bevel gear (6), and a workbench (8) is fixedly installed on the top of the transmission rod (7); A noise meter (9) is arranged above the workbench (8) and is used to detect the collected noise. A front display screen (10) is fixedly installed on the outside of the noise meter (9). A stud bolt (11) passes through the top of the workbench (8). One end of the stud bolt (11) is movably connected to a side collection frame (12). A hexagonal nut (13) is arranged on the outside of the stud bolt (11). A rotating shaft (14) is provided at one end of the side collection frame (12) and is used for connecting and installing a support rod (15). A threaded groove (18) is provided on the outside of the support rod (15). A threaded rod (19) is fixedly installed inside the threaded groove (18). A fixing frame (20) is fixedly installed on one end of the threaded rod (19). A noise collecting microphone (25) is provided inside the fixing frame (20). A connecting wire (26) is fixedly connected to the bottom of the noise collecting microphone (25).

2. A noise measurement device for safety evaluation according to claim 1, characterized in that: The workbench (8) is movably connected to the chassis (2), and the first bevel gear (5) is meshedly connected to the second bevel gear (6).

3. The noise measurement device for safety evaluation according to claim 1, characterized in that: The number of the side collecting racks (12) is set to four, and the four side collecting racks (12) are distributed at equal intervals on the workbench (8).

4. The noise measurement device for safety evaluation according to claim 1, characterized in that: A telescopic cylinder (16) is provided below the support rod (15), and one end of the telescopic cylinder (16) is movably connected to a movable frame (17).

5. The noise measurement device for safety evaluation according to claim 1, characterized in that: A torsion spring (21) is provided inside the fixing frame (20), and a first fixing clamp (22) is fixedly mounted on one end of the torsion spring (21).

6. The noise measurement device for safety evaluation according to claim 1, characterized in that: An interference screw (23) passes through the outside of the fixing frame (20), and a second fixing clamp (24) is fixedly mounted on one end of the interference screw (23).

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