CN111551380A

CN111551380A - Movable small reverberation chamber

Info

Publication number: CN111551380A
Application number: CN202010365480.7A
Authority: CN
Inventors: 宋千光; 张伟; 彭力; 陶林; 王志浩
Original assignee: Xian Aerospace Propulsion Institute; Beijing Institute of Structure and Environment Engineering; Tianjin Aerospace Ruilai Technology Co Ltd
Current assignee: Xian Aerospace Propulsion Institute; Beijing Institute of Structure and Environment Engineering; Tianjin Aerospace Ruilai Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-18

Abstract

The invention relates to the technical field of test equipment, in particular to a movable small reverberation chamber, which comprises a back plate, two side plates, a top plate, a bottom plate and universal wheels, wherein the back plate is provided with a plurality of through holes; the universal wheels are fixed at the bottom of the bottom plate, vertical plate reinforcing ribs are fixed on the inner sides of the side plates, transverse and longitudinal triangular steel profiles are welded on the outer sides of the back plate, the two side plates and the top plate respectively, and vent holes are formed in two sides of the lower portion of the back plate. The structure has the advantages that firstly, the manufacturing cost is low, and the construction period is short; secondly, the assembly is movable and detachable, and does not occupy space permanently; thirdly, the system can share a set of sound source and air source with a large reverberation room, thereby avoiding repeated construction; fourthly, the test magnitude of the reverberation room is greatly improved, and the sound pressure level can reach 167dB under the condition that the air source and the sound source are sufficient.

Description

Movable small reverberation chamber

Technical Field

The invention relates to the technical field of test equipment, in particular to a movable small reverberation room.

Background

At present, equipment carried on platforms such as rockets, missiles and airplanes is often in a high-noise environment, and the working performance and the noise tolerance of the equipment in the noise environment need to be verified through a noise test. Noise tests are currently performed mainly with reverberant rooms and traveling wave tubes. The reverberation chamber is an effective tool for ground noise tests, but the volume and the achievable sound pressure level of the reverberation chamber are a spear, and if a high sound pressure level is to be achieved, the reverberation chamber cannot be too large, but some products have large volume, a large reverberation chamber must be used, and the test level of the large reverberation chamber is lower. At present, no matter a large or small reverberation room is made of a reinforced concrete structure, the method is high in cost and permanent in space occupation, especially the existing large reverberation room and the small reverberation room are required to be built to improve the test magnitude, and if the site space is occupied to build a set of reverberation room system, the resource is greatly wasted.

Disclosure of Invention

The present invention is directed to overcoming the deficiencies of the above-mentioned techniques and providing a portable compact reverberation chamber.

In order to achieve the purpose, the invention adopts the following technical scheme: a portable miniature reverberation chamber, characterized by: comprises a back plate, two side plates, a top plate, a bottom plate and universal wheels; the universal wheels are fixed at the bottom of the bottom plate, vertical plate reinforcing ribs are fixed on the inner sides of the side plates, transverse and longitudinal triangular steel profiles are welded on the outer sides of the back plate, the two side plates and the top plate respectively, and vent holes are formed in two sides of the lower portion of the back plate.

Preferably, the bottom plate and the top plate are respectively provided with a hanging through hole.

The invention has the advantages that firstly, the cost is low, and the construction period is short; secondly, the assembly is movable and detachable, and does not occupy space permanently; thirdly, the system can share a set of sound source and air source with a large reverberation room, thereby avoiding repeated construction; fourthly, the test magnitude of the reverberation room is greatly improved, and the sound pressure level can reach 167dB under the condition that the air source and the sound source are sufficient.

Drawings

FIG. 1 is a three-dimensional perspective back view of the present invention;

FIG. 2 is a three-dimensional open pattern of the present invention;

FIG. 3 is a top plan view of the present invention;

FIG. 4 is a side view of a triangular steel profile of the present invention

FIG. 5 is a cross-sectional view of a triangular steel section of the present invention;

the numbers in the figures are as follows: 1. a back plate; 101. an air outlet; 2. a side plate; 201. vertical plate reinforcing ribs; 3. a top plate; 301. a top plate hanging hole; 4. a base plate; 401. a bottom plate suspension hole; 5. a universal wheel; 6. a triangular steel section.

Detailed Description

Spatially relative terms such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one feature or characteristic to another feature or characteristic as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, an onboard external hanging longitudinal vibration test platform comprises a back plate 1, two side plates 2, a top plate 3, a bottom plate 4 and universal wheels 5; four sides of each special plate are provided with through holes, the plates are connected through the through holes on the four sides by bolts to form a box structure with one open side, the universal wheels are fixed at the bottom of the bottom plate, vertical plate reinforcing ribs 201 are fixed on the inner side of the side plates, and the vertical plate reinforcing ribs are used for improving the vertical rigidity of the small reverberation chamber; the transverse and longitudinal triangular steel profiles 6 are respectively welded on the outer sides of the back plate, the two side plates and the top plate, so that the cost is low, and convenience and rapidness are realized; and air vents 101 are arranged on two sides of the lower part of the back plate and used for discharging airflow blown out of the horn, and the air vents can also be used as threading holes of the test cables. The top plate and the bottom plate are respectively provided with a top plate hanging through hole 301 and a bottom plate hanging through hole 401, and the hanging through holes are used for installing hanging rings inside, so that the test piece can be conveniently hung and fixed. All of the tailored panels are coated with epoxy on their inner surfaces to enhance sound reflection.

The volume is about 10 cubic meters, 4 universal wheels are arranged at corresponding positions at the bottom of the bottom plate, the movable small reverberation room can be placed in the large reverberation room, the open side faces to the horn, noise tests can be carried out by using a sound source and an air source system of the large reverberation room, and the test magnitude can reach 167 dB.

The working principle is as follows:

put into large-scale reverberation room at first with portable little reverberation room, the test piece hangs through rings on roof and the bottom plate in the reverberation room, connects the test cable, and the cable wears out through the backplate air vent and is connected to the control appearance on, promotes little reverberation room again and makes uncovered one side hug closely the horn wall, and uncovered covers one or more horn mouths completely, closes large-scale reverberation room gate again, can open air supply and sound source system and carry out the noise test debugging.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A portable miniature reverberation chamber, characterized by: comprises a back plate, two side plates, a top plate, a bottom plate and universal wheels; the universal wheels are fixed at the bottom of the bottom plate, vertical plate reinforcing ribs are fixed on the inner side faces of the side plates, transverse and longitudinal triangular steel profiles are welded on the outer sides of the back plate, the bottom plate, the two side plates and the top plate respectively, and vent holes are formed in two sides of the lower portion of the back plate.

2. The portable miniature reverberation chamber of claim 1, wherein: and the bottom plate and the top plate are respectively provided with a hanging through hole.