Testing plan of product on-line noise and method of constructing equivalent testing relation by related international requirement

A noise testing and product technology, applied in the direction of noise figure or signal-to-noise ratio measurement, etc., can solve the problems of low sampling probability and unfavorable product quality control, and achieve the effect of simple and easy steps.

Inactive Publication Date: 2005-10-12
CHINA JILIANG UNIV
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Problems solved by technology

[0004] It is not difficult to imagine: such a complicated national standard noise test scheme, out of helplessness, the probability of random inspection in related products produced in larg

Method used

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  • Testing plan of product on-line noise and method of constructing equivalent testing relation by related international requirement
  • Testing plan of product on-line noise and method of constructing equivalent testing relation by related international requirement
  • Testing plan of product on-line noise and method of constructing equivalent testing relation by related international requirement

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Embodiment Construction

[0024] All technical schemes used for online testing must be simple and fast, and the present invention is no exception. And the key is: it is necessary to solve this simple and fast non-standard test plan and the relevant product national standard requirements (scheme) to establish an equivalent test relationship, and whether there is a test environment for noise test items under online test conditions, and The present invention has found the way that solves these two problems:

[0025] 1. A relatively quiet environment for noise measurement is found, that is, a bar-shaped semi-soundproof room (R) that can be installed with a curtain door (H) on the conveyor belt device (X) of the production line in the present invention and is made of soundproof materials. Noise test: This "bar-shaped" semi-soundproof room (R) and at least one "door (H)" are designed to improve the degree of "relatively quiet" (weaken the introduction of strong external noise as much as possible), the purpos...

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Abstract

An on - line noise test method of product includes setting semi - soundproof room on product conveying belt and setting sound level meter in the semi - soundproof room, then applying equivalent test relation listed in national standard to judge whether noise project is qualified or not. The method is suitable to be used on production line of electromechanical products in small size.

Description

Technical field: [0001] The present invention relates to noise testing technology and its established method. Background technique: [0002] As we all know, the general products with driving components, especially in the field of household electrical appliances, most of the products, such as range hoods, washing machines and electric fans, etc., will produce annoying noises when they work. Therefore, the relevant national standards will stipulate the noise limit value of this kind of products, and the size of the noise is usually represented by the value of decibel (db). [0003] For example, the national standard for range hoods (section 6.4 in GB / T 17713----1999) has quite scientific noise test items and their implementation plans: usually on a certain three-dimensional surface around the tested product (Cube surface or sphere surface) Select several representative noise test points, and then substitute the measured noise value into the corresponding formula to calculate ...

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Application Information

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IPC IPC(8): G01R29/26
Inventor 梁嘉麟
Owner CHINA JILIANG UNIV
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