Array bracket

An array and suspension technology, which is applied in the field of near-field acoustic holographic test bracket structure, can solve problems such as low reliability, poor test effect, and complex bracket structure, and achieve good test effect, variable test structure, and simple structure Effect

Active Publication Date: 2010-02-10
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] In the planar near-field acoustic holographic test, a microphone array is usually used. The size of the array needs to be determined according to the specific conditions of the test equipment, test objects and test environment. The measurement surface composed of the microphone array needs to be supported by a bracket. The bracket structure usually purchased Complex, low reliability, and general-purpose design, this bracket does not consider the application requirements of the specific test environment, resulting in poor test results

Method used

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Embodiment Construction

[0018] Such as figure 1 As shown, an array bracket includes a fixing piece 10 and a connecting piece 20 , adjacent fixing pieces 10 are connected together through the connecting piece 20 , and the fixing piece 10 is provided with a support hole 11 .

[0019] Such as figure 1 , 2 As shown, the connecting part 20 is a metal rod, and the fixing part 10 is a plastic ball, and the plastic ball is provided with a recess 12 in which the end of the metal rod is embedded.

[0020] figure 1 The microphone array in is composed of metal rods of different lengths and hard plastic balls on which the microphones are placed. There are recesses 12 on the top, bottom, left, and right sides of the plastic ball to connect with the metal rod, and a support hole 11 is provided in the middle of the plastic ball to place the microphone, and the support hole 11 is a through hole. Metal rods of different lengths are used to meet the needs of different precision and different analysis frequency band...

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Abstract

The invention belongs to the technical field of engine pedestal test, and in particular relates to a near field acoustical holography test bracket structure used in engine pedestal test environment. The bracket comprises fixing members and connecting members, the adjacent fixing members are connected by the connecting members, and the fixing members are provided with supported holes. As known fromthe above technical scheme, in the invention, microphones can be put into the supported holes of the fixing members which are connected by the connecting members, and the number and structure of thefixing members and the connecting members can be determined according to the concrete requirement of the test, thus, the invention has simple structure and changeable test structure, therefore, the test effect is better.

Description

technical field [0001] The invention belongs to the technical field of engine bench testing, and in particular relates to a near-field acoustic holographic test support structure used in the engine bench testing environment. Background technique [0002] The planar near-field acoustic holography (NAH) technology based on Fourier acoustics is a test technology that records holographic data on the measurement surface close to the surface of the measured object, and then reconstructs the three-dimensional sound field through transformation technology. It is mainly used for the identification of noise sources, etc. Acoustic test. [0003] In the planar near-field acoustic holographic test, a microphone array is usually used. The size of the array needs to be determined according to the specific conditions of the test equipment, test objects and test environment. The measurement surface composed of the microphone array needs to be supported by a bracket. The bracket structure usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/02
Inventor 朱振华陈春来余志文
Owner CHERY AUTOMOBILE CO LTD
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