CN218162863U

CN218162863U - Sound pressure testing system

Info

Publication number: CN218162863U
Application number: CN202222821295.1U
Authority: CN
Inventors: 梁振发
Original assignee: GAC Toyota Motor Co Ltd
Current assignee: GAC Toyota Motor Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2022-12-27
Anticipated expiration: 2032-10-25

Abstract

The utility model provides a sound pressure test system, which is used in the field of automobile tests and comprises a base, a main frame body, a plurality of mounting parts, a microphone and data processing equipment; the main frame body extends along the vertical direction and is detachably arranged on the base; a plurality of mounting members are mounted on the main frame body at intervals along the height direction of the main frame body; the microphones and the mounting pieces are consistent in number and are detachably mounted on the mounting pieces in a one-to-one correspondence manner; the data processing device is respectively connected with each microphone signal through a cable. The sound pressure testing system has the advantages of high measuring precision and high efficiency.

Description

Sound pressure testing system

Technical Field

The utility model relates to an experimental technical field of car acoustic pressure measurement especially relates to an acoustic pressure test system.

Background

According to the requirement of a regulation GB15742, the sound pressure performance of the automobile horn is a certification project which must be passed before the automobile is produced and sold, and the specific test requirement is to measure the maximum sound pressure level at the position 7m right in front of the automobile and within the height of 0.5-1.5 m. At present, a general test means is that a tester holds a noise meter with hands to measure at a prescribed position in front of a vehicle and records data. On one hand, the distance between a measuring person and a measuring point is too small, and the human body has uncontrollable influences on absorption, reflection and the like of sound near the measuring point; on the other hand, the measurement conditions are multiple, the sound pressure data at different positions are manually acquired for multiple times and are manually read and recorded, so that reading and recording errors are easy to occur, and the manually recorded result needs to be input into a computer again in the later period for electronic processing, so that the efficiency is low; meanwhile, as the horn rings for a plurality of times with a plurality of measurements, the temperature of the horn rises, the sound pressure of the horn becomes unstable, and as a result, the deviation increases.

Therefore, there is a need for a new sound pressure testing system to solve at least some of the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sound pressure test system aims at solving the technical problem that artifical measurement accuracy is not high and measurement of efficiency is low among the prior art.

The utility model provides a sound pressure test system, which comprises a base, a main frame body, a plurality of mounting pieces, a microphone and data processing equipment, wherein the main frame body extends along the vertical direction and is detachably mounted on the base; the mounting pieces are mounted on the main frame body at intervals along the height direction of the main frame body; the number of the microphones and the number of the mounting pieces are consistent, and the microphones are detachably mounted on the mounting pieces in a one-to-one correspondence manner; the data processing equipment is respectively connected with the microphone signals through cables.

In one embodiment, the mounting part comprises a fixing sleeve and a mounting part connected with the fixing sleeve, the mounting part is mounted on the main frame body at intervals in the height direction, the fixing sleeve comprises a side wall and an inner channel surrounded by the side wall, the microphone is detachably mounted in the inner channel, and the cable is led out from one end of the inner channel.

In an embodiment, the main frame body is provided with a sliding groove extending in the height direction of the main frame body, the sound pressure testing system further comprises a slider nut connected with the sliding groove in a sliding manner, the sliding groove is provided with an abutting portion, two opposite sides of the abutting portion are abutted to the slider nut and the mounting portion respectively, and the slider nut is in threaded connection with the mounting portion.

In an embodiment, the side wall is provided with a threaded hole, and the mounting member further comprises a clamping bolt which is screwed in the threaded hole and penetrates into the inner passage to abut against the microphone.

In one embodiment, the microphone includes a detection end and a connection end, the detection end extends out of the fixing sleeve and faces the sound source, one end of the cable is in signal connection with the connection end and is led out from one end of the inner channel far away from the detection end, and the other end of the cable is in signal connection with the data processing device.

In an embodiment, the microphone further comprises a wind-resistant ball, which is wrapped around the detection end arrangement.

In one embodiment, the main frame body comprises a column, the column extends along the height direction and is detachably mounted on the base, and the mounting portions are mounted on the column at intervals along the height direction.

In an embodiment, the main frame further comprises an inclined support, and the inclined support is respectively connected with the base and the column to circumferentially support the column.

In one embodiment, the data processing device comprises a data acquisition instrument and a data analyzer in signal connection with the data acquisition instrument, and the data acquisition instrument is in signal connection with each microphone through a cable.

In one embodiment, the data analyzer includes a computer in signal communication with the data collector.

In the technical scheme, the microphones and the mounting pieces are consistent in quantity and are detachably mounted on the mounting pieces in a one-to-one correspondence mode, the mounting pieces are mounted on the main frame body at intervals along the height direction of the main frame body according to test requirements, and the main frame body is mounted on the base; when a sound pressure test is carried out, the base is placed at a preset position so as to meet the requirement of a test distance between the base and a test vehicle, and when the test vehicle rings a horn, a plurality of microphones with different heights respectively acquire sound pressure information of height points of the microphones; compared with a mode of manually holding the microphone for testing, the method has the advantages that multiple groups of data can be collected through the microphones by ringing the horn once, the condition that the horn is not required to be sounded for multiple times and the microphones are held by hands for testing at different height points is avoided, manual operation steps are greatly reduced, and efficiency is improved; moreover, the problem of unstable sound pressure exists during horn heating, and the heating degree of the horn is reduced due to the reduction of the horn sounding times, so that the deviation is reduced, and the test accuracy is improved. Data processing equipment passes through the cable and respectively with each microphone signal connection, and the sound pressure data that the microphone was gathered can in time reliably transmit data processing equipment and carry out analysis and record, reads when having avoided manual operation and the inconvenient condition of record, also is favorable to promoting efficiency and accuracy. Meanwhile, when the sound pressure test is carried out, a tester can be far away from the test area, and uncontrollable influences such as absorption and reflection of sound near the test point in the test area are avoided. The utility model discloses a have measurement accuracy height and efficient advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sound pressure testing system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a base, a main frame body and a slider nut according to an embodiment of the present invention;

fig. 3 is a schematic sectional structure view of the main frame body, the slider nut and the mounting portion according to the embodiment of the present invention.

The reference numbers illustrate:

1. a base; 2. a main frame body; 21. a column; 22. obliquely supporting; 23. a chute; 24. a slider nut; 25. an abutting portion; 3. a mounting member; 31. fixing the sleeve; 32. clamping the bolt; 33. an installation part; 4. a microphone; 41. a wind-resistant ball; 5. a cable; 6. a data acquisition instrument; 7. a data analyzer; 8. the vehicle is tested.

The purpose of the present invention, its functional features and advantages will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a sound pressure testing system, which includes a base 1, a main frame 2, a plurality of mounting members 3, a microphone 4, and a data processing device, wherein the main frame 2 extends in a vertical direction and is detachably mounted on the base 1; a plurality of mounting members 3 are mounted to the main frame 2 at intervals in the height direction of the main frame 2; the number of the microphones 4 is consistent with that of the mounting pieces 3, and the microphones are detachably mounted on the mounting pieces 3 in a one-to-one correspondence manner; the data processing device is in signal connection with the respective microphone 4 via a cable 5.

In the above embodiment, the microphones 4 and the mounting members 3 are in the same number and are detachably mounted on the mounting members 3 in a one-to-one correspondence manner, the mounting members 3 are mounted on the main frame body 2 at intervals along the height direction of the main frame body 2 according to the test requirement, and the main frame body 2 is mounted on the base 1; when a sound pressure test is carried out, the base 1 is placed at a preset position to meet the requirement of a test distance between the base 1 and a test vehicle 8, and when the test vehicle 8 rings a horn, the microphones 4 with different heights respectively collect sound pressure information of height points of the microphones; compared with a mode of manually holding the microphone 4 for testing, the method has the advantages that multiple groups of data can be acquired through the microphones 4 by one-time horn sounding, multiple times of horn sounding are not needed, the microphones 4 are held for testing at different height points, manual operation steps are greatly reduced, and efficiency is improved; moreover, the problem of unstable sound pressure exists during horn heating, and the heating degree of the horn is reduced due to the reduction of the horn sounding times, so that the deviation is reduced, and the test accuracy is improved. The data processing equipment is respectively in signal connection with each microphone 4 through the cable 5, sound pressure data collected by the microphones 4 can be timely and reliably transmitted to the data processing equipment for analysis and recording, the condition of inconvenient reading and recording during manual operation is avoided, and the efficiency and the accuracy are also improved. Meanwhile, when the sound pressure test is carried out by the scheme of the embodiment, a tester can be far away from the test area, and uncontrollable influences such as absorption and reflection of sound near the test point when the tester is placed in the test area are avoided. The embodiment has the advantages of high measurement accuracy and high efficiency.

Referring to fig. 1, in an embodiment, the mounting member 3 includes a fixing sleeve 31 and a mounting portion 33 connected to the fixing sleeve 31, the mounting portion 33 is mounted to the main frame 2 at intervals in a height direction, the fixing sleeve 31 includes a side wall and an inner passage surrounded by the side wall, the microphone 4 is detachably mounted to the inner passage, and the cable 5 is led out from one end of the inner passage; each microphone 4 is mounted in an inner passage of the corresponding fixed sleeve 31, and a cable 5 connected with the microphone 4 is led out from one end of the inner passage; specifically, the mounting portion 33 connected to the outer side wall of the fixing sleeve 31 is mounted at a predetermined height position of the main frame 2, the microphones 4 are mounted in the inner passages of the fixing sleeves 31 to collect sound pressures at different height positions, and the data is transmitted to the data processing device through the cable 5 leading out of the inner passages.

Referring to fig. 1 to 3, in an embodiment, the main frame body 2 is provided with a sliding groove 23 extending along a height direction of the main frame body 2, the sound pressure testing system further includes a slider nut 24 slidably connected to the sliding groove 23, the sliding groove 23 is formed with a contact portion 25, two opposite sides of the contact portion 25 are respectively contacted with the slider nut 24 and the mounting portion 33, and the slider nut 24 is in threaded connection with the mounting portion 33. Before the slider nut 24 is fixedly connected with the mounting part 33, the slider nut 24 can be adjusted in a sliding manner along the extending direction of the sliding groove 23, after the slider nut is adjusted to a required position, the mounting part 33 and the slider nut 24 are installed in a threaded manner through a bolt, after the mounting part 33 and the slider nut 24 are locked in a threaded manner, the two opposite sides of the abutting part 25 are clamped respectively, so that the slider nut 24 can not slide any more, and the corresponding fixing sleeve 31 and the corresponding microphone 4 at the position are kept assembled at the position; through setting up 23 structures of spout, can conveniently adjust when required collection point position quantity and required collection height change to have extensive adaptability.

Referring to fig. 1, in an embodiment, the side wall is provided with a threaded hole, the mounting member 3 further includes a clamping bolt 32, and the clamping bolt 32 is screwed into the threaded hole and penetrates into the inner passage to tightly contact the microphone 4; when the microphone 4 is mounted in the inner passage, one side of the microphone 4 abuts against the inner side of the side wall, the other side of the microphone 4 opposite to the side wall is abutted and clamped by the clamping bolt 32 penetrating into the inner passage, and the clamping bolt 32 is locked with the threaded hole through threads, so that the microphone 4 is stably clamped and fixed. Those skilled in the art can understand that when the wall thickness of the sidewall is thin and the thread is inconvenient to process, the through hole can be opened and a welding nut is arranged on one side of the through hole close to the inner side of the sidewall, at this time, the welding nut and the clamping bolt 32 are matched and locked, and the clamping bolt 32 passes through the welding nut and abuts against the microphone 4 to achieve a clamping effect.

Referring to fig. 1, in one embodiment, the microphone 4 includes a detection end and a terminal, the detection end extends out of the fixing sleeve 31 and faces the sound source, one end of the cable 5 is in signal connection with the terminal and is led out from one end of the inner channel far away from the detection end, and the other end of the cable 5 is in signal connection with the data processing device; specifically, the detection end of each microphone 4 stretches out in fixed sleeve 31 and faces the sound source towards the same direction, and the cable 5 that each wiring end is connected is all drawn forth from the one end that fixed sleeve 31 kept away from the detection end, through above setting, the arrangement of the detection end of each microphone 4 and wiring end is more unanimous and orderly, is favorable to reducing the production of test deviation, and the orientation of wiring end is unanimous also can effectively avoid the alternately chaotic condition between cable 5 simultaneously.

Referring to fig. 1, in one embodiment, the microphone 4 further includes a wind-resistant ball 41, the wind-resistant ball 41 being disposed to surround the detection end; the detection end is wrapped by the wind-proof ball 41, so that the effects of sound absorption and interference prevention can be achieved, and the accuracy of test data can be ensured within a certain wind speed range; to a certain extent, the wind-proof ball 41 can also protect the detection end.

Referring to fig. 1 and 2, in an embodiment, the main frame 2 includes a column 21, the column 21 extends in a height direction and is detachably mounted to the base 1, and the mounting portions 33 are mounted to the column 21 at intervals in the height direction; the upright post 21 structure supports the mounting part 3 and the microphone 4 in height, has the characteristics of simple structure and small volume, and has small interference on sound absorption, reflection and the like, thereby being beneficial to reducing errors and being more convenient to carry and transfer.

Referring to fig. 1 and 2, in an embodiment, the main frame 2 further includes an inclined strut 22, and the inclined strut 22 is respectively connected to the base 1 and the column 21 to circumferentially support the column 21; specifically, the inclined strut 22 is located the one end that the stand 21 is close to the base, and inclined strut 22 one end is connected with base 1, and the inclined strut 22 other end is connected with stand 21 for carry out the circumference at the bottom of stand 21 to stand 21 and support, guarantee the holistic structural stability of main frame body 2.

Referring to fig. 1, in an embodiment, the data processing apparatus includes a data acquisition instrument 6 and a data analyzer 7 in signal connection with the data acquisition instrument 6, the data acquisition instrument 6 is in signal connection with each microphone 4 through a cable 5; specifically, the data acquisition instrument 6 comprises a processing module and a display screen, each microphone 4 transmits the acquired sound pressure information to the processing module through a cable 5, and the processing module outputs the processed signal to the display screen for displaying the sound pressure information so as to visually observe the sound pressure information at each microphone 4 in real time; the processing module is in signal connection with the data analyzer 7 for transmitting information to the data analyzer 7 for further analysis processing.

Referring to fig. 1, in one embodiment, the data analyzer 7 further comprises a computer in signal connection with the data collector 6; specifically, the processing module of the data acquisition instrument 6 transmits the data to the computer, and an operator can conveniently analyze, sort and record the data through a software program; the realization of the data interaction between the computer and the data acquisition instrument 6 is the prior art, and is not described herein again.

The above is only the optional embodiment of the present invention, and therefore the patent scope of the present invention is not limited, all of which are under the technical conception of the present invention, the equivalent structure transformation made by the contents of the specification and the attached drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. An acoustic pressure testing system, comprising:

a base;

the main frame body extends along the vertical direction and is detachably mounted on the base;

a plurality of mounting members mounted to the main frame body at intervals in a height direction of the main frame body;

the microphones and the mounting pieces are in the same number and are detachably mounted on the mounting pieces in a one-to-one correspondence manner;

and the data processing equipment is respectively connected with the microphone signals through cables.

2. The sound pressure testing system of claim 1, wherein the mounting member includes a fixing sleeve and a mounting portion connected to the fixing sleeve, the mounting portion is mounted to the main frame at intervals in a height direction, the fixing sleeve includes a side wall and an inner passage defined by the side wall, the microphone is detachably mounted to the inner passage, and the cable is led out from one end of the inner passage.

3. The sound pressure testing system according to claim 2, wherein the main frame body is provided with a sliding groove extending in a height direction of the main frame body, the sound pressure testing system further comprises a slider nut slidably connected with the sliding groove, the sliding groove is provided with a butting portion, two opposite sides of the butting portion are respectively butted against the slider nut and the mounting portion, and the slider nut is in threaded connection with the mounting portion.

4. The acoustic pressure testing system of claim 2, wherein the sidewall defines a threaded aperture, and the mounting member further comprises a clamping bolt threadably engaged with the threaded aperture and penetrating into the inner passage for abutting against the microphone.

5. The sound pressure testing system according to claim 2, wherein the microphone includes a detection end and a terminal, the detection end protrudes from the fixing sleeve and faces the sound source, one end of the cable is in signal connection with the terminal and is led out from one end of the inner passage away from the detection end, and the other end of the cable is in signal connection with the data processing device.

6. The sound pressure testing system of claim 5, wherein the microphone further comprises a wind break ball positioned around the sensing end.

7. The sound pressure testing system of claim 2, wherein the main frame includes a post that extends in a height direction and is removably mounted to the base, the mounting portions being spaced apart in the height direction from the post.

8. The acoustic pressure testing system of claim 7, wherein the main frame further comprises diagonal braces respectively coupled to the base and the column to circumferentially support the column.

9. The sound pressure testing system according to any one of claims 1 to 8, wherein the data processing device comprises a data collector and a data analyzer in signal connection with the data collector, the data collector being in signal connection with each of the microphones via a cable.

10. The sound pressure testing system of claim 9, wherein the data analyzer includes a computer in signal communication with the data acquisition instrument.