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Establishment method of simple testing scheme for products noise equivalent to national standard requirements

A testing scheme and product technology, applied in measurement devices, ultrasonic/sonic/infrasonic measurements, instruments, etc., can solve the problems of difficult product testing, low probability of sampling testing of noise items, unfavorable product quality control, etc., to improve quality control. , Increase the probability of sampling test, the effect of simple and easy steps

Inactive Publication Date: 2006-03-15
梁嘉麟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the noise test schemes of different products will be different, even quite different, but from a macro point of view, they are all similar in degree.
It is not difficult to imagine that it is difficult to test each product with such a complicated national standard noise test scheme
Out of helplessness, the sampling test probability of noise items designed in mass-produced related products is very low, which is naturally not conducive to product quality control

Method used

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  • Establishment method of simple testing scheme for products noise equivalent to national standard requirements
  • Establishment method of simple testing scheme for products noise equivalent to national standard requirements

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Embodiment Construction

[0018] Here, the connotation of the present invention is described by taking the noise test of the range hood as an example.

[0019] Depend on figure 1 hint:

[0020] In the "anechoic chamber" that meets the environmental requirements of the national standard for range hood noise testing (GB / T 4214), place a range hood 1 to be tested lying down, at a distance of 1 meter horizontally from the center of its range hood 3 At L, place a sound level meter 4 again. Turn on the power and start the built-in centrifugal fan 2 of the range hood 1 under test, and soon a noise decibel value P can be measured on the sound level meter 4:

[0021] It can be imagined that if P is less than or equal to the critical noise standard value K 0 Critical noise non-standard value P with equivalence relationship 0 , then: the noise item of the tested range hood 1 is qualified, if P is greater than P 0 , then: the noise item of the tested range hood 1 is unqualified.

[0022] figure 2 The key o...

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Abstract

The present invention is the establishing method of simple measurement scheme of product noise equivalent to the requirement in relevant Chinese standard. The method is established via measuring and drawing 'K-P' standard noise data vs non-standard noise data curve in rectangular coordinate graph; marking the clinical noise value K0 the relevant standard requires in the curve; marking corresponding non-standard clinical noise value P0; measuring the non-standard noise data P in the designed non-standard method; and comparing P and P0 to determine whether the measured product reaches to the noise requirement of the relevant Chinese standard.

Description

Technical field: [0001] The invention relates to a noise testing technique and a method for establishing a simplified scheme thereof. Background technique: [0002] As we all know, a general set of products with driving components, especially in the field of household appliances, most of the products, such as: range hoods, washing machines and electric fans, etc., will produce annoying noise when working . Therefore, the national standard GB4214 (Determination of the sound power level of the noise of household appliances) stipulates a scientific noise test plan. Moreover, the size of its noise is usually characterized by the magnitude of the decibel (db) value. [0003] The magnitude of the noise caused by a product in different directions is usually different, for example: at the same distance from the lower part of the range hood (unblocked) and its peripheral side (blocked by the casing), the perceived noise The size will obviously not be the same, therefore, the natio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
Inventor 梁嘉麟
Owner 梁嘉麟