CN218994523U

CN218994523U - Calibration device for aircraft cabin environmental sound level meter

Info

Publication number: CN218994523U
Application number: CN202223359189.2U
Authority: CN
Inventors: 季伟斌
Original assignee: Changchun Fangyuan Aviation Equipment Co ltd
Current assignee: Bangmeng Hongdao Measurement and Testing Co.,Ltd.
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-09
Anticipated expiration: 2032-12-14

Abstract

The utility model provides an aircraft cabin environment sound level meter calibration device, which comprises a test assembly, a test assembly and a control assembly, wherein the test assembly comprises an electric telescopic rod, a sleeve, a sound pressure calibrator, an exhaust pipe, a barometer, a vacuum pump, a signal transmitter and a controller; the sleeve is fixedly connected to the bottom end of the electric telescopic rod, the sound pressure calibrator is installed in the sleeve, the exhaust pipe is communicated with the outer side wall of the sound pressure calibrator, the barometer is installed on the exhaust pipe, and the vacuum pump is installed at one end of the exhaust pipe. According to the utility model, the internal air pressure of the sound pressure calibrator is changed through the operation of the vacuum pump, the air pressure value is detected through the air pressure gauge, the calibration operation of the sound level gauge under different air pressure values can be completed, the accuracy of the sound level gauge in the operation of the aircraft cabin is ensured, the signal is transmitted through the signal transmitter, the sound pressure calibrator can be remotely controlled to complete the sound pressure calibration operation, the operator does not need to arrive at the site for calibration, the operation is simple and convenient, and the time is saved.

Description

Calibration device for aircraft cabin environmental sound level meter

Technical Field

The utility model relates to a calibration device, in particular to an aircraft cabin environment sound level meter calibration device, and belongs to the technical field of cabin sound level meter calibration.

Background

The sound level meter is the most basic noise measuring instrument, which is an electronic instrument but is different from objective electronic instruments such as voltmeters and the like. When the acoustic signal is converted into the electric signal, the time characteristic of the response speed of human ears to the acoustic wave can be simulated; the intensity characteristics of the characteristics are changed with different sensitivities and at different loudness levels. A sound level meter is a subjective electronic instrument.

The sound level meter is required to be calibrated before use, when the existing sound level meter calibration equipment is used for calibration, the ambient air pressure of the existing sound level meter calibration equipment is kept unchanged, the area with a lower altitude is about one standard atmosphere, however, the air pressure in a passenger cabin of an aircraft is generally 0.6 standard atmosphere when the aircraft flies at high altitude, and meanwhile, the use of the sound level meter can be influenced by the air pressure, so that the difference value of the sound level meter in the use of the aircraft cabin can not be ensured in an allowable variation range by the calibration under the normal environment, and therefore, the aircraft cabin ambient sound level meter calibration device is provided.

Disclosure of Invention

In view of the foregoing, it is desirable to provide an aircraft cabin environmental sound level meter calibration device that solves or alleviates the technical problems of the prior art, and at least provides an advantageous option.

The technical scheme of the embodiment of the utility model is realized as follows: the calibration device comprises a test assembly, wherein the test assembly comprises an electric telescopic rod, a sleeve, a sound pressure calibrator, an exhaust pipe, a barometer, a vacuum pump, a signal transmitter and a controller;

the sleeve is fixedly connected to the bottom end of the electric telescopic rod, the sound pressure calibrator is arranged in the sleeve, the exhaust pipe is communicated with the outer side wall of the sound pressure calibrator, the barometer is arranged on the exhaust pipe, the vacuum pump is arranged at one end of the exhaust pipe, and the signal transmitter and the controller are arranged on one side of the sound pressure calibrator.

Further preferred is: the rear surface of the testing component is provided with a main body component, and the main body component comprises a bottom plate, a mounting hole, a charging seat, a sound level meter main body, a microphone, a sealing ring, a supporting plate, a sliding rail and a sliding table;

the four mounting holes are symmetrically formed in four corners of the front surface of the bottom plate.

Further preferred is: the charging seat is arranged on the front surface of the bottom plate.

Further preferred is: the sound level meter main body is arranged at the top of the charging seat, the microphone is arranged at the top of the sound level meter main body, the microphone is arranged below the sound pressure calibrator, and the sealing ring is fixedly connected to the outer side wall of the microphone.

Further preferred is: the backup pad fixed connection in the front surface of bottom plate, electric telescopic handle installs in the top of backup pad.

Further preferred is: the sliding rail is fixedly connected to the front surface of the bottom plate.

Further preferred is: the sliding table is connected to the front surface of the sliding rail in a sliding way, and the vacuum pump is arranged on the front surface of the sliding table.

Further preferred is: the signal output end of the barometer is in signal connection with the signal input end of the controller, and the controller is electrically connected with the electric telescopic rod and the vacuum pump.

By adopting the technical scheme, the embodiment of the utility model has the following advantages:

1. according to the utility model, the internal air pressure of the sound pressure calibrator is changed through the operation of the vacuum pump, the air pressure value is detected through the air pressure gauge, the calibration operation of the sound level gauge under different air pressure values can be completed, and the accuracy of the sound level gauge in the operation of the aircraft cabin is ensured.

2. According to the utility model, the signal transmission device is used for transmitting signals, so that the sound pressure calibrator can be remotely controlled to complete sound pressure calibration work, an operator is not required to arrive at site calibration, the operation is simple and convenient, and the time is saved.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will become apparent by reference to the drawings and the following detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a view angle block diagram of the present utility model;

FIG. 2 is a view of another view of the present utility model;

FIG. 3 is a block diagram of a test assembly of the present utility model;

fig. 4 is a bottom plate structure diagram of the present utility model.

Reference numerals: 10. a body assembly; 11. a bottom plate; 12. a mounting hole; 13. a charging stand; 14. a sound level meter body; 15. a microphone; 16. a seal ring; 17. a support plate; 18. a slide rail; 19. a sliding table; 20. a testing component; 21. an electric telescopic rod; 22. a sleeve; 23. a sound pressure calibrator; 24. an exhaust pipe; 25. a barometer; 26. a vacuum pump; 27. a signal transmitter; 28. and a controller.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-4, an embodiment of the present utility model provides an aircraft cabin environmental sound level meter calibration device, which comprises a test assembly 20, wherein the test assembly 20 comprises an electric telescopic rod 21, a sleeve 22, a sound pressure calibrator 23, an exhaust pipe 24, a barometer 25, a vacuum pump 26, a signal transmitter 27 and a controller 28;

the sleeve 22 is fixedly connected to the bottom end of the electric telescopic rod 21, the sound pressure calibrator 23 is installed in the sleeve 22, the exhaust pipe 24 is communicated with the outer side wall of the sound pressure calibrator 23, the barometer 25 is installed on the exhaust pipe 24, the vacuum pump 26 is installed at one end of the exhaust pipe 24, and the signal transmitter 27 and the controller 28 are arranged on one side of the sound pressure calibrator 23.

In this embodiment, specific: the rear surface of the test assembly 20 is provided with a main body assembly 10, and the main body assembly 10 comprises a bottom plate 11, a mounting hole 12, a charging seat 13, a sound level meter main body 14, a microphone 15, a sealing ring 16, a supporting plate 17, a sliding rail 18 and a sliding table 19;

four mounting holes 12 are symmetrically formed in four corners of the front surface of the base plate 11, the mounting holes 12 facilitate fixing of the base plate 11, and the base plate 11 is used for rapid installation of the sound pressure calibrator 23 and the sound level meter body 14.

In this embodiment, specific: the charging stand 13 is mounted on the front surface of the base plate 11, and the charging stand 13 can function to support the sound level meter body 14 and charge the sound level meter body 14.

In this embodiment, specific: the sound level meter main body 14 is arranged at the top of the charging seat 13, the microphone 15 is arranged at the top of the sound level meter main body 14, the microphone 15 is arranged below the sound pressure calibrator 23, the sealing ring 16 is fixedly connected to the outer side wall of the microphone 15, and the sealing ring 16 is used for sealing the microphone 15 and the sound pressure calibrator 23 and preventing air leakage during calibration.

In this embodiment, specific: the backup pad 17 fixed connection in the front surface of bottom plate 11, electric telescopic handle 21 installs in the top of backup pad 17, and electric telescopic handle 21 is used for driving the motion of acoustic pressure calibrator 23, accomplishes the calibration.

In this embodiment, specific: the slide rail 18 is fixedly attached to the front surface of the base plate 11.

In this embodiment, specific: the sliding table 19 is slidably connected to the front surface of the sliding rail 18, the vacuum pump 26 is mounted on the front surface of the sliding table 19, the sliding table 19 is used for matching with the vacuum pump 26 to move, and when the electric telescopic rod 21 works, the vacuum pump 26 can move along with the sound pressure calibrator 23.

In this embodiment, specific: the signal output end of the barometer 25 is connected with the signal input end of the controller 28 in a signal manner, and the controller 28 is electrically connected with the electric telescopic rod 21 and the vacuum pump 26.

The utility model works when in work: the controller 28 is sent by the signal transmitter 27, the controller 28 controls the electric telescopic rod 21 to drive the sound pressure calibrator 23 to move downwards until the sound pressure calibrator 23 and the sealing ring 16 are sealed, the vacuum pump 26 starts to work, the air pressure inside the sound pressure calibrator 23 is changed, the air pressure is detected by the air pressure gauge 25, the sound pressure calibration under different air pressure values is carried out, and the calibration result is sent to the remote terminal by the signal transmitter 27, so that an operator knows the condition of the sound level meter according to the numerical value, the operator does not need to arrive at the site calibration, the operation is simple and convenient, the time is saved, the calibration work of the sound level meter under different air pressure values can be completed, and the accuracy of the sound level meter in the aircraft cabin during work is ensured.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that various changes and substitutions are possible within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An aircraft cabin environmental sound level meter calibration device comprising a test assembly (20), characterized in that: the test assembly (20) comprises an electric telescopic rod (21), a sleeve (22), a sound pressure calibrator (23), an exhaust pipe (24), a barometer (25), a vacuum pump (26), a signal transmitter (27) and a controller (28);

the utility model discloses a sound pressure calibrator, including electric telescopic handle (21), sleeve (22) fixed connection in the bottom of electric telescopic handle (21), sound pressure calibrator (23) install in the inside of sleeve (22), blast pipe (24) communicate in the lateral wall of sound pressure calibrator (23), barometer (25) install in on blast pipe (24), vacuum pump (26) install in one end of blast pipe (24), signal transmission ware (27) and controller (28) set up in one side of sound pressure calibrator (23).

2. An aircraft cabin environmental sound level meter calibration device as defined in claim 1, wherein: the rear surface of the testing assembly (20) is provided with a main body assembly (10), and the main body assembly (10) comprises a bottom plate (11), a mounting hole (12), a charging seat (13), a sound level meter main body (14), a microphone (15), a sealing ring (16), a supporting plate (17), a sliding rail (18) and a sliding table (19);

the four mounting holes (12) are symmetrically formed in four corners of the front surface of the bottom plate (11).

3. An aircraft cabin environmental sound level meter calibration device as claimed in claim 2, wherein: the charging seat (13) is mounted on the front surface of the bottom plate (11).

4. An aircraft cabin environmental sound level meter calibration device according to claim 3, wherein: the sound level meter main body (14) is arranged at the top of the charging seat (13), the microphone (15) is arranged at the top of the sound level meter main body (14), the microphone (15) is arranged below the sound pressure calibrator (23), and the sealing ring (16) is fixedly connected to the outer side wall of the microphone (15).

5. An aircraft cabin environmental sound level meter calibration device according to claim 3, wherein: the supporting plate (17) is fixedly connected to the front surface of the bottom plate (11), and the electric telescopic rod (21) is installed at the top of the supporting plate (17).

6. An aircraft cabin environmental sound level meter calibration device according to claim 3, wherein: the sliding rail (18) is fixedly connected to the front surface of the bottom plate (11).

7. An aircraft cabin environmental sound level meter calibration device as defined in claim 6, wherein: the sliding table (19) is connected to the front surface of the sliding rail (18) in a sliding mode, and the vacuum pump (26) is mounted on the front surface of the sliding table (19).

8. An aircraft cabin environmental sound level meter calibration device as defined in claim 1, wherein:

the signal output end of the barometer (25) is connected with the signal input end of the controller (28) in a signal way,

the controller (28) is electrically connected with the electric telescopic rod (21) and the vacuum pump (26).