CN1558192A - Establishment method of simple testing scheme for products noise equivalent to national standard requirements - Google Patents
Establishment method of simple testing scheme for products noise equivalent to national standard requirements Download PDFInfo
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- CN1558192A CN1558192A CNA200410016245XA CN200410016245A CN1558192A CN 1558192 A CN1558192 A CN 1558192A CN A200410016245X A CNA200410016245X A CN A200410016245XA CN 200410016245 A CN200410016245 A CN 200410016245A CN 1558192 A CN1558192 A CN 1558192A
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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:
The present invention relates to the method for building up of noise testing technology and reduction procedure thereof.
Background technology:
As everyone knows, the general product that driver part is set, particularly in the household electrical appliance product scope, most products, for example: range hood, washing machine and electric fan, or the like, during work, all can generation make us worried noise.Therefore, GB GB4214 (mensuration of household electrical appliance noise sound power level) has stipulated the noise testing scheme of science.And, characterize the size of its noise usually with the size of decibel (db) numerical value.
The noise size that is caused on different directions owing to a product all is different usually, for example: the bottom of range hood (unobstructed) and its all sidepieces (having housing to stop) same distance place, the noise size of feeling obviously can be not identical, therefore, just stipulated the noise testing project implementation scheme (seeing GB/T 17713-1999 " 6.4 " joint) of suitable science in the GB of range hood: get four noise measuring points in the part of curved surface, in the formula of substitution regulation, calculate its average noise data then.
For this reason, when the average noise logarithmic data of a certain test product of test, the general a certain solid space surface (cube face or spherome surface) of around it, establishing before this, and the noise measuring point of selection several representative (NF that measures generally can be not identical) on this spatial surface, and then in the relevant formula of the NF substitution that will measure, finally can extrapolate the standard noise average data of this test product, its unit represents with decibel (db).
Although the scheme of the noise testing of different product can be different, even difference is bigger, on macroscopic view, all is the degree difference that belongs to similar.Be not difficult to imagine: the GB noise testing scheme of above-mentioned complexity like this is difficult to each product is tested.Reluctantly, the noise project sample testing probability that designs in the Related product of producing in enormous quantities is very low, and this is unfavorable for the quality control of product naturally.
Summary of the invention:
The present invention creates conditions for increasing substantially the production sampling tests probability by proposing the method that a kind of simple and direct noise testing scheme is set up, and finally reaches the purpose of raising to the quality control dynamics of product.
In order to realize goal of the invention, intend adopting following technical method step:
One. test noise in " anechoic room " (referring to: half " anechoic room " or complete " anechoic room ") of relevant GB regulation acoustical testing environment: the product (containing certified products and unacceptable product) that is taken to few three same models, layout method according to the GB requirement, on the more than one noise measuring point around it, use sound meter to carry out noise spot and survey, and the standard noise data of extrapolating every product in the computing formula of the noise spot of every product being surveyed data substitution GB respectively respectively;
Two. still according to above-mentioned GB regulation in the test occasion of " anechoic room ": will be above-mentioned all pass through products that national standard methods were tested, according to the single measuring point position method that around it, designs voluntarily, use sound meter respectively every product to be measured non-standard noise data;
Three. draw " the accurate data of the nonstandard noise of standard noise data----" rectangular coordinate graph of relation according to above-mentioned " one " and " two " at least three group data, in this graph of relation, require at first to mark critical noise criteria K according to GB
0Coordinate position, according to the curve in the graph of relation, mark K again
0The non-accurate value P of corresponding critical noise mark
0The coordinate position at place;
Four. at above-mentioned same model product, when using sound meter to carry out the noise testing of non-standard method, if the non-accurate value P of the noise that measures mark is less than or equal to P according to single measuring point position method of design voluntarily to other
0The time, then: the noise project of this product is qualified, if the non-accurate value P of the noise that measures mark is greater than P
0The time, then: the noise project of this product is just defective.
------is obvious, the non-accurate value P of critical noise mark that adopts in the inventive method
0Be equivalent to the critical noise criteria K that adopts in the national standard method
0, " four " in the above-mentioned steps have in fact also constituted the simple type noise testing scheme of coming out of deriving simultaneously from the inventive method step.
Characteristics of the present invention:
The equivalent method step that the present invention proposes is simple, and the noise testing scheme of derivation had both come from the GB requirement, but was simpler than very much the GB requirement, helped increasing the sample testing probability of product, improved its quality control dynamics.
Description of drawings:
Fig. 1 has illustrated to design voluntarily a non-standard simple type single-point noise testing scheme to range hood.
Fig. 2 has illustrated the model of " standard noise data----nonstandard numbers according to " rectangular coordinate graph of relation.
1: the range hood of lying down (back side lands); 2: built-in centrifugal blower; 3: the oil extraction mouth; 4: sound meter; L: distance; K
0: critical noise criteria; P
0: the non-standard value of critical noise.
Embodiment:
Illustrate by Fig. 1:
In " anechoic room " that meet range hood noise testing GB (GB/T 4214) environmental requirement, lie down and place a tested range hood (1), locate in oil extraction mouth (3) center 1 meter distance of level (L) of leaving it, place a sound meter (4) again.Energized starts the built-in centrifugal blower (2) of tested range hood (1), and very fast sound meter (4) is gone up and just can be measured a noise decibel numerical value P:
It is contemplated that, if P is less than or equal to and critical noise criteria (K
0) the non-standard value (P of critical noise of equivalent relation arranged
0), then: the noise project of tested range hood (1) is qualified, if P is greater than P
0, then: tested range hood (1) noise project is just defective.
Fig. 2 has illustrated key of the present invention: by through five range hoods (1) of GB embodiment test (three stage noises qualified two defective), after passing through the off-gauge test implementation scheme of the present invention (by the requirement of Fig. 1 signal) test noise again, be depicted as " K-P " graph of relation of reflection " standard noise data---non-standard noise data ".Wherein, the non-standard value (P of critical noise
0) in the drawings position, be the critical noise criteria (K that reaches of GB regulation
0), the corresponding relation by above-mentioned " K-P " relation curve obtains.
Obviously, by the simple type noise testing scheme that equivalent method of the present invention obtains, its main meaning is:
Make that relevant GB noise testing scheme is simplified significantly, allow the noise testing project implementation become quite convenient, thereby for the product that produce in enormous quantities to come out (realizing) aspect its noise item purpose quality control raising by improving test sampling probability, created and advantageous conditions.
Claims (2)
1. method that requires the product noise easily-testing scheme of equivalence to set up with GB, realized by following step:
One. according to GB regulation in the test occasion of " anechoic room ": the product that is taken to few three same models, layout method according to the GB requirement, on the more than one noise measuring point around it, using sound meter to carry out noise spot surveys, afterwards, the standard noise data of extrapolating every product in the computing formula of the noise spot of every product being surveyed data substitution GB respectively respectively;
Two. still according to the GB regulation in the test occasion of " anechoic room ": will be above-mentioned all pass through products that national standard methods were tested, according to the single measuring point position method that around it, designs voluntarily, use sound meter respectively every product to be measured non-standard noise data;
Three. draw " K-P " rectangular coordinate graph of relation of " the non-standard noise data of standard noise data----" according to above-mentioned " one " and " two " at least three group data, at get the bid out the critical noise criteria K of GB requirement of this graph of relation
0Coordinate position, according to the curve in the graph of relation, mark K again
0The non-accurate value P of corresponding critical noise mark
0The position at place;
Four. at above-mentioned same model product, when using sound meter to carry out the noise testing of non-standard method, if the non-standard value P of the noise that measures is less than or equal to P according to single measuring point position method of design voluntarily to other
0The time, then: the noise project of this product is qualified, if the non-standard value P of the noise that measures is greater than P
0The time, then: the noise project of this product is just defective.
2. method that as claimed in claim 1 and GB require the product noise easily-testing scheme of equivalence to set up, the product of described at least three same models wherein contains certified products and unacceptable product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016245 CN1245611C (en) | 2004-02-12 | 2004-02-12 | Establishment method of simple testing scheme for products noise equivalent to national standard requirements |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016245 CN1245611C (en) | 2004-02-12 | 2004-02-12 | Establishment method of simple testing scheme for products noise equivalent to national standard requirements |
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| Publication Number | Publication Date |
|---|---|
| CN1558192A true CN1558192A (en) | 2004-12-29 |
| CN1245611C CN1245611C (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410016245 Expired - Fee Related CN1245611C (en) | 2004-02-12 | 2004-02-12 | Establishment method of simple testing scheme for products noise equivalent to national standard requirements |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297806C (en) * | 2005-04-13 | 2007-01-31 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| CN110441024A (en) * | 2019-07-19 | 2019-11-12 | 浙江工业大学 | A kind of range hood noise testing auxiliary device |
| CN113339861A (en) * | 2021-06-04 | 2021-09-03 | 广东万家乐燃气具有限公司 | Noise detection method for range hood |
-
2004
- 2004-02-12 CN CN 200410016245 patent/CN1245611C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297806C (en) * | 2005-04-13 | 2007-01-31 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| CN110441024A (en) * | 2019-07-19 | 2019-11-12 | 浙江工业大学 | A kind of range hood noise testing auxiliary device |
| CN113339861A (en) * | 2021-06-04 | 2021-09-03 | 广东万家乐燃气具有限公司 | Noise detection method for range hood |
| CN113339861B (en) * | 2021-06-04 | 2023-12-12 | 广东万家乐燃气具有限公司 | Noise detection method for range hood |
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| Publication number | Publication date |
|---|---|
| CN1245611C (en) | 2006-03-15 |
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