CN1680819A

CN1680819A - Testing plan of product on-line noise and method of constructing equivalent testing relation by related international requirement

Info

Publication number: CN1680819A
Application number: CN 200410030656
Authority: CN
Inventors: 梁嘉麟
Original assignee: 梁嘉麟
Current assignee: China Jiliang University
Priority date: 2004-04-05
Filing date: 2004-04-05
Publication date: 2005-10-12
Anticipated expiration: 2024-04-05
Also published as: CN100368816C

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

On-line Product noise testing scheme and the method that requires foundation equivalence test to concern with relevant GB thereof

Technical field:

The present invention relates to the method for noise testing technology and foundation 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, relevant national standard can stipulate that all the noise of this series products limits numerical value, and, characterize the size of its noise usually with the size of decibel (db) numerical value.

For example, noise testing project and embodiment thereof that suitable science is just arranged in the GB of range hood (joint of 6.4 among the GB/T 17713----1999): all be to select several representational noise measuring points usually, and then will extrapolate the standard noise data of this test product in the NF substitution corresponding formulas that measure at test product a certain three-dimensional surface (cube face or spherome surface) on every side.Although the scheme of the noise testing of other different product can be different, all similar.

Be not difficult to imagine: so complicated GB noise testing scheme, reluctantly, the sampling observation probability in the Related product of producing in enormous quantities is very low, obviously, this quality control for product is disadvantageous, let alone every product is implemented the online detection of its noise on product line.

Summary of the invention:

The present invention's purpose: propose a kind ofly simple and direct can implement the scheme (online checkout facility of noise and using method thereof) of online noise testing and require the method for the equivalent relation set up to product with corresponding product GB.

In order to realize goal of the invention, intend adopting following technology:

A. the online checkout facility of noise of the present invention comprises:

One. be arranged on and produce half soundproof room that adopts sound-proof material to constitute on the line conveyer belt apparatus (so-called half soundproof room is meant and can't accomplishes the shape space, chamber that is isolated from the outside fully), and, at least pass in and out on the position of half soundproof room, two sides plastics flexible sheet cord formula door respectively is set one producing the line conveyer belt apparatus, to reduce importing into of external noise.

Two. in half soundproof room sound meter is set, it and survey are made an uproar spacing distance are arranged between the product, and its position location can be determined by design is next voluntarily as the case may be fully.

The using method of the online checkout facility of noise B. of the present invention:

One. when the survey product of making an uproar is transferred belting and brings the survey at half soundproof room middle part into when making an uproar the position, energized allows to be surveyed the product of making an uproar and sends noise, is carried out the test of the non-standard value P of noise by sound meter;

Two. with above-mentioned noise non-standard value P and critical noise criteria P ₀Compare: if P is less than or equal to P ₀, then: the make an uproar noise of product of this survey is qualified, if P is greater than P ₀, then: the make an uproar noise of product of this survey is defective.

The establishment step of the online detection using method of noise C. of the present invention (the non-standard value of critical noise P ₀Determine):

One. get and survey the product (wherein containing certified products and unacceptable product) that at least three stage noises of product same model vary in size of making an uproar, layout method according to this product 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 every more than one noise spot of product being surveyed data substitution GB respectively;

Two. state the product that all were tested through national standard method,, use sound meter respectively every product to be measured non-standard noise data according to the single measuring point position method that around it, designs voluntarily;

Three. draw " standard noise data----nonstandard numbers according to " rectangular coordinate graph of relation 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 curve map, mark K again ₀The non-accurate value P of corresponding critical noise mark ₀The position at place.

Obviously, the non-accurate value P of critical noise mark that adopts in the inventive method ₀Be equivalent to the critical noise criteria K that stipulates in the national standard method ₀

Characteristics of the present invention:

The equivalent method step that the present invention proposes is simple, makes both to have come from the noise testing scheme that derives the GB requirement, but be simpler than very much the GB requirement, for condition has been created in the online noise testing of implementing product.

Description of drawings:

Fig. 1 has illustrated by a kind of online noise testing scheme of the present invention.

Fig. 2 is that the A of Fig. 1 is to view (left side view).

Fig. 3 has illustrated " standard noise data----nonstandard numbers according to " rectangular coordinate graph of relation.

X: production line conveyer belt apparatus; R: bar shaped half soundproof room that constitutes by sound-proof material; H: plastics flexible sheet cord formula door; L: survey the distance of making an uproar; 1: survey the product (range hood) of making an uproar; 2: noise source (centrifugal fan); 3: noise emission position (oil extraction mouth); 4: be positioned at the sound meter on the half soundproof room interior wall.

Embodiment:

Every technical scheme that is used for on-line testing, prerequisite characteristics are simple and direct and quick, and the present invention is no exception.And key wherein is: must solve this simple and direct and non-standard fast testing scheme and require (scheme) can set up the test relation of equivalence with relevant product GB, and the test environment that whether possesses the noise testing project under the on-line testing condition, and the present invention has found the way that solves these two problems:

1. found one relatively quietly to survey the environment of making an uproar, be be arranged among the present invention cord formula door (H) can be installed on the production line conveyer belt apparatus (X) and carry out noise testing by bar shaped half soundproof room (R) that sound-proof material constitutes: this " bar shaped " half soundproof room (R) all is that purpose is: form good online noise testing environment in locational space is made an uproar in the survey at " bar shaped " half soundproof room (R) middle part for the degree of " relative quiet " that makes increases (weakening importing into of extraneous very noisy as much as possible) with " door (H) " at least together.

2. found and implemented simple and direct and scheme single fast measuring point test in above-mentioned relatively quietly environment,--it is to be difficult to realize that the multiple spot of on-line testing surveys the science way of making an uproar and adding formula to calculating that----GB requires (scheme).------and, single-point of the present invention is surveyed the GB that the scheme of making an uproar again fully can be relevant with product and is required (scheme) to set up the relation that equivalence is tested.

Based on the solution of above-mentioned two big problems, for solid foundation has been created in realization of the present invention.

Signal by Fig. 1 and Fig. 2:

Lie down the tested range hood of Yi Taitai (1) that is placed on the production line conveyer belt apparatus (X), be carried from left to right when passing through two road plastics flexible sheet cord formula doors (H) and entering into the middle part test position of bar shaped half soundproof room (R) that sound meter (4) is set, to tested range hood (1) energized, send within several seconds behind the noise, whether qualified the probe of surveying the sound meter (4) that the distance (L) of making an uproar locates at tested range hood (1) just can measure a noise decibel numerical value P who is emitted by oil extraction mouth (3) by centrifugal fan (2), and finish differentiation numerical value P work.------sound meter (4) is surveyed the position that is provided with in the locational space of making an uproar at bar shaped half soundproof room (R) at middle part, the geometric configuration that can look the planform of test product fully and survey the space of making an uproar designs definite voluntarily, and the value suggestion of wherein surveying the distance (L) of making an uproar is about 0.3 to 1.5 meter.

Fig. 3 is an example with range hood (1), 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 (with reference to the signal of figure 1 and Fig. 2) 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, the simple type noise testing scheme that obtains by equivalent detecting method of the present invention, its main meaning is: make that relevant GB noise testing scheme is simplified significantly, allow the noise testing project implementation become quite convenient, thereby be its noise item purpose on-line testing, created and advantageous conditions.

Claims

1. On-line Product noise testing facility,

It is characterized in that:

One. on generation line conveyer belt apparatus (X), half soundproof room (R) is set, on the position that produces line conveyer belt apparatus (X) turnover half soundproof room (R) two sides, a sect (H) is set respectively at least;

Two. sound meter (4) is set in half soundproof room (R).

2. On-line Product noise testing facility as claimed in claim 1,

It is characterized in that:

Described door (H) is to be made of plastics flexible sheet cord.

3. the using method of an On-line Product noise testing facility as claimed in claim 1:

It is characterized in that:

One. when the survey product (1) of making an uproar is transferred belting (X) and brings the survey at half soundproof room (X) middle part into when making an uproar the position, allow and survey the product (1) of making an uproar and send noise, carry out the test of the non-standard value P of noise by sound meter (4);

Two. with above-mentioned noise non-standard value P and critical noise criteria P ₀Compare: if P is less than or equal to P ₀, then: the make an uproar noise of product (1) of this survey is qualified, if P is greater than P ₀, then: the make an uproar noise of product (1) of this survey is defective.

4. On-line Product noise testing facility using method as claimed in claim 3 and GB require to set up the method step of equivalence test relation,

It is characterized in that:

One. get and the survey product that at least three stage noises of product (1) same model vary in size of making an uproar, layout method according to this product GB requirement, on the more than one noise measuring point around it, using sound meter (4) to carry out noise spot surveys, afterwards, the standard noise data of extrapolating every product in the computing formula of every more than one noise spot of product being surveyed data substitution GB respectively;

Two. the product that all were tested through national standard method, according to the single measuring point position method that designs voluntarily around it, use sound meter (4) respectively every product to be measured non-standard noise data;

Three. draw " standard noise data----nonstandard numbers according to " rectangular coordinate graph of relation 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.

5. On-line Product noise testing facility using method as claimed in claim 4 and GB require to set up the method step of equivalence test relation,

It is characterized in that:

The product that at least three stage noises of described same model vary in size wherein contains certified products and unacceptable product.