CN110243453A

CN110243453A - The method that A weighted acoustic power level mensuration detects tank for excrement pan water inlet noise

Info

Publication number: CN110243453A
Application number: CN201810481859.7A
Authority: CN
Inventors: 李文杰; 王博; 冯金艳; 郝秋伟; 李丽华
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-05-18
Filing date: 2018-05-18
Publication date: 2019-09-17
Anticipated expiration: 2038-05-18
Also published as: CN110243453B

Abstract

The present invention relates to a kind of detection methods of intaking valve for toilet cistern water inlet noise, and detecting step includes: sample installation and debugging；Sound source reference body and measurement surface determine；Sound-pressure-level measurement；Acoustic power level calculates and ambient noise, test environment are gentle as condition is corrected；Evaluation of result；Its special feature is that: parallelepiped is measured on surface with cumulative percent acoustic power level L using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter_WA(50)The water intake valve noise of characterization carries out accurate quantitative detection；Present invention provide that the A weighted cumulative percent time average sound pressure level L ' of the enterprising water noise in parallelepiped measurement surface and ambient noise_pAi(ST)(50)And L_pAi(B)(50)It is measured, calculates its acoustic power level L within the specific moisturizing period_WA(50), and evaluation of result foundation is provided.The present invention has filled up intaking valve for toilet cistern water inlet noise detection technique field blank, can be Improving The Quality of Products, regulating market order provides detection technique support.

Description

The method that A weighted acoustic power level mensuration detects tank for excrement pan water inlet noise

Technical field

The present invention relates to noise quantitative measuring method, specifically a kind of slow time using sound level meter A weighted equivalent sound level Character of weighting " S " measures on surface with cumulative percent acoustic power level L parallelepiped_WA(50)The tank for excrement pan of characterization is intake The method that valve water inlet noise is detected, belongs to tank for excrement pan accessory physicochemical property detection technique field.

Background technique

In recent years, toilet can not be ignored as basic livelihood issues and important civilized windows, construction quality, It is strong in the incremental and people of the people's livelihood major fields usage amount such as food and drink, tourism, house along with toilet seat and its cistern fittings The enhancing of health environmental consciousness, tank for excrement pan water inlet noise monitoring and prevention and control are increasingly subject to various circles of society's common concern.

Core component of the inlet valve as tank for excrement pan accessory, water inlet noise rinse shared weight in noise in toilet seat It is higher, directly affect and decide the magnitude level for rinsing noise.The noise generic liquid as caused by toilet stool washing process Aerodynamic Noise of A scope is substantially made of the structural vibration noise of pipeline, the fluid noise of water and Cavitation Noise three parts；And Fluid noise is the important source for rinsing noise, and main noise, the water flowed including water in toilet seat hydrosphere and on inner wall exists The noise and the siphon of blowdown later period rotated in toilet seat is destroyed and noise when inlet valve water replenishing；Therefore noise is rinsed to remove It is closely bound up outer with the internal structure of toilet seat itself, largely it is limited by the water inlet noise of intaking valve for toilet cistern.

Since noise has all characteristics of Acoustic Wave Propagation, with the increase of propagation distance, sound intensity degree gradually weakens, and meets Phenomena such as reflection, diffraction, scattering, absorption, will occur for sound wave when to barrier；Wherein with the close phase of water intake valve noise testing The propagation characteristic of pass is the directive property of sound wave, i.e., in the finger with sound source at identical position, due to noise source with distinctness Tropism, so that there are certain capacity volume variances for the sound intensity received on different directions.Experiment shows in water intake valve process In, the sound intensity is maximum above water tank, front is taken second place, left and right it is weak it, rear noise intensity it is minimum；Therefore in actual measurement When must using noise source directive property rationally be arranged measuring point distribution.

In recent years, for the law enforcement demand of environmental protection administration, though China's noise measuring standards system obtains tremendous development, Field involved by existing professional noise testing specification is only limitted to indoor and outdoor surroundings, vehicle, equipment, electric appliance etc., is not yet related into water Valve water inlet noise level measurement field.For stringent cistern fittings product Quality Control, distribution of countries implements mandatory standard GB within 2011 26730-2011 " sanitary ware closet gravity type water replanishing device and sanitary ware rack ", clear stipulaties inlet valve is " during water inlet The noise of generation should be not more than 55dB (A) ".But related water intake valve noise measuring in the 7.5th article of standard " noise fest " The technical requirements of method are extremely simple, " are not higher than the test cabinet of 30dB (A) in ambient noise, inlet valve is mounted on away from ground Face height is that tank lid is not added in the standard water tank of 400mm；Placement accuracy is not less than the sound level meter of 0.1d B (A), makes its spy Gauge head is away from water tank front surface 1m, and be above the ground level 1m；Water inlet dynamic pressure is adjusted to 0.3MPa, inlet valve is opened, starts after 10s Measurement, the highest noise figure of record water inlet overall process in triplicate, report arithmetic mean of instantaneous value." be both not directed to sound source reference body, The Principles of Acoustics such as surface are measured, the key technologies such as corresponding result calculation formula, the data revision of the convention and uncertainty of measurement are also lacked Content；Water intake valve noise measuring operation is caused to lack scientific and normative, result data does not have comparativity and repetition Property, it is difficult to product quality is promoted and market order specification plays due lead and supporting role.Through to Hebei, Guangdong, river It is found after being investigated extensively to the country such as south main product, due to the missing of dependence test technology, it is difficult to be carried out to product quality quasi- True quantitative verification.The scarcity of detection method affect to a certain extent enterprise to the popularization of new technology, annoying consumer couple The trust of product restricts the further development of industry.

Currently, sanitaryware has been put into increased quality major fields, sanitary ceramics and its auxiliary products detection side are improved Method standards system, research and development intaking valve for toilet cistern water inlet noise detection technique has been trend of the times.Therefore, it is produced for promotion is related Quality is promoted, and polishing influences the toilet short slab of people life quality, it would be highly desirable to strengthen support of the patented technology to standard development Effect；The appearance of the present invention patent has certain realistic meaning for the upgrading of power-assisted China tank for excrement pan accessory industrial transformation.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of slow time weighted using sound level meter A weighted equivalent sound level is special Property " S " to parallelepiped measurement surface on cumulative percent acoustic power level L_WA(50)The intaking valve for toilet cistern of characterization is intake The method that noise is detected, is able to solve water intake valve noise or even toilet seat rinses the bathrooms ceramics water inlet/rows such as noise The accurate quantitative test problem of water noise.

In order to solve the above technical problems, the technical solution adopted by the present invention is that:

A kind of intaking valve for toilet cistern water inlet noise detecting method, detecting step include: the installation of (1) sample and debugging； (2) sound source reference body and parallelepiped measurement surface determine；(3) sound-pressure-level measurement；(4) acoustic power level calculates and background is made an uproar Sound, test environment are gentle as condition is corrected；(5) evaluation；It is characterized in that, using sound level meter A weighted equivalent sound level Slow time character of weighting " S " to parallelepiped measurement surface on cumulative percent acoustic power level L_WA(50)The closet of characterization Tank intake valve of water water inlet noise carries out accurate quantitative detection, specific:

In sound-pressure-level measurement:

(1) before being measured to the water inlet noise of intaking valve for toilet cistern in semi-anechoic room or reverberation chamber, first according to GB/T " acoustic sound pressure method measures the engineering of proximate freedom field above Sound Power Level of Noise Source harmony energy level reflecting surface to 3767-2016 Method " in relevant regulations for all kinds of typical installation requirements of intaking valve for toilet cistern sample determine different plane of reflection conditions The positioning of lower sound source reference body simultaneously calculates its sound source characteristics size d₀；Simultaneous selection and water intake valve noise source reference body phase Corresponding parallelepiped measures surface and is really sized, and specifies the coordinate of different measurement surface microphone position arrays；

(2) it in semi-anechoic room or reverberation chamber, is adopted using the specific moisturizing period of intaking valve for toilet cistern as sound signal The time of integration of collection measures selected parallelepiped using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter Measure the cumulative percent time average sound pressure level L of ambient noise on surface_pAi(B)(50)；Then in 0.30MPa ± 0.05MPa Test dynamic pressure under the conditions of, start inlet valve water replenishing device；It is surveyed for the different rate of water make-up of tank for excrement pan (half punching or Quan Chong) Examination requires, within the specific moisturizing period, selected by slow time character of weighting " S " measurement using the A weighted equivalent sound level of sound level meter Parallelepiped measures the cumulative percent time average sound pressure level L ' of water intake valve noise on surface_pAi(ST)(50)；

In acoustic power level calculating:

According to related notion and calculation formula in GB/T 3767-2016, in the test dynamic pressure of 0.30MPa ± 0.05MPa Under the conditions of power, the time of integration acquired using the specific moisturizing period of intaking valve for toilet cistern as sound signal, sound level meter is existed The A weighted cumulative percent time of the water inlet noise and ambient noise that measure on selected parallelepiped measurement surface is averaged sound Arbitrarily downgrade L '_pAi(ST)(50)And L_pAi(B)(50)As basic data, its corresponding time average sound pressure level mean value is calculatedWithAnd to background noise modification value K_1A, test Environment Correction Value K_2AAnd meteorological condition correction value C₁、C₂Influence into Row analysis is derived from the accumulative percentage of A weighted of each intaking valve for toilet cistern sample water inlet noise under the conditions of set dynamic pressure Number acoustic power level L_WA(50)And the average value of every group of sample water inlet noise A weighted cumulative percent acoustic power levelIt is bright simultaneously Really the corresponding data revision of the convention requires and uncertainty of measurement range；

In evaluation of result:

As some sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)3 samples water inlet noises are organized greater than this A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10% when, need to extract one group of sample again and repeat Experiment；And two groups of front and back intaking valve for toilet cistern sample is calculated under the conditions of set dynamic pressure, using the A weighted etc. of sound level meter Imitate the water inlet noise cumulative percent sound function that the slow time character of weighting " S " of sound level measures through parallelepiped measurement surface method Rate grade L_WA(50)Arithmetic mean of instantaneous valueThe noise A weighted cumulative percent acoustic power level L if some sample is intake_WA(50) Greater than this two groups of 6 samples water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10%, Then abandon it；Take remaining inlet valve sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value Evaluation index as this group of intaking valve for toilet cistern sample water inlet noise.

The present invention by adopting the above technical scheme, compared with prior art, beneficial effect is:

(1) advanced: in semi-anechoic room or reverberation chamber acoustic enviroment, by applying modern precision instrument --- sound level The slow time character of weighting " S " of the A weighted equivalent sound level of meter to parallelepiped measurement surface on ambient noise and water inlet make an uproar Sound is measured, and is a transient process in view of the starting of inlet valve water replenishing mode, taking can correctly reflect it to human psychological and Sheng The A weighted cumulative percent acoustic power level L of the influence of reason_WA(50)As subjective assessment parameter；Detection technique has certain elder generation Into property, reach the modernization of intaking valve for toilet cistern water inlet noise measuring, it must to realize that the precision of testing result has been established The hardware foundation wanted.

(2) scientific: non-steady based on liquid in following GB/T 3767-2016 on the basis of acoustics versatility directive/guide The discontinuous feature for causing noise is flowed in stationary state, for water intake valve mechanism of noise generation and route of transmission, according to envelope sound Source test philosophy establishes parallelepiped measurement surface acoustical model；Comprehensive analysis background noise, environment and meteorological condition etc. because Influence of the element to testing result, and using the measurement result under civil buildings feedwater piping operating pressure experimental condition as water inlet Noise rating index meets tank for excrement pan accessory real use state and consumer's focus, improves the section of detection method The property learned.

(3) normative: test result to be evaluated according to national requirements for environmental protection and target level of product quality, related instrument Equipment, sound source reference body, measurement surface, calculation formula etc. technical requirements are referring to China's Basic of Acoustics standard GB/T 3767- Respective specified in 2016；And the structural diagrams of applicable reference body and parallelepiped measurement surface are provided, it specifies simultaneously The series of key techniques contents such as sample installation, measuring point coordinate, measuring process, calculation formula, uncertainty, evaluation of result, energy Enough realize the quantification of intaking valve for toilet cistern water inlet noise measuring result.

(4) perspective: currently, the detection technique in relation to water intake valve noise is relatively easy unilateral both at home and abroad, to lack phase Principles of Acoustics basis is closed, the applicability and accuracy of test method are poor；This patent method foundation adopts mark ISO 3744:2010's " acoustic sound pressure method measures proximate freedom field above Sound Power Level of Noise Source harmony energy level reflecting surface to GB/T 3767-2016 Engineering method " in associated acoustic directive/guide and the measuring principle in relation to A weighted acoustic power level, measurement surface be applicable in, calculation formula section It learns, the class of accuracy of measurement result is 2 grades, technically has centainly perspective.

(5) accuracy: using high degree of automation, technologically advanced maturation sound level meter as test equipment, using three The evaluation result of intaking valve for toilet cistern sample determines conclusion as final；Choose the A of application sound level meter in the specific moisturizing period The slow time character of weighting " S " of weighted equivalent sound level measures the accumulative percentage into water noise through parallelepiped measurement surface method Number acoustic power level L_WA(50)As correlated results evaluation index；And to influence factors such as ambient noise, test environment, meteorological conditions It is modified, determines the cumulative effect of uncertainty in measurement process comprehensively, can effectively avoid measurement error.

(6) innovative: the influence for feed pressure to intaking valve for toilet cistern water inlet noise is given according to civil buildings Noise testing demand under the conditions of waterpipe UP range and different rate of water make-up；(partly punching or complete was chosen in the specific moisturizing period Punching) parallelepiped measurement the enterprising water noise in surface A weighted cumulative percent acoustic power level L_WA(50)As each inlet valve The evaluation of result index of sample；And clear test water tank mounting condition and cistern fittings technical requirements, pass through and limits each measuring point and sit The measurement frequency and data processing of ambient noise and water inlet noise, improve the accuracy and representativeness of testing result, energy at mark Enough fill up the blank of presently relevant the field of test technology.

(7) operability: sound level meter is cheap, is widely used, sample as defined in the method for the present invention installation, debugging and A series of experiments is easy to operation；Related test parameter, measurement surface, measuring point array, testing procedure, calculation formula, data Processing, describing clearly for technology contents of evaluation criterion etc. and it is specific, correlation graph illustrates intuitive and accurate, is easy to this The understanding and grasp of patented method may advantageously facilitate the transfer of achievement so that patent working process has stronger operability Conversion and popularization and application.

(8) universality: being based on above-mentioned advantage, and the method for the present invention has stronger practicability, be conducive to expand inspection, Grind, produce the popularization and application of all circles；Be conducive to that intaking valve for toilet cistern water inlet noise detection technique is supported to realize generalization, it can be right Other sanitary wares such as ceramic pedestal pan, squatting pan, the flushing noise of urinal and wash basin, bidet and to/row Generated noise and its detection technique research provide reference to the products such as waterpipe in use.

Further, preferred embodiment of the invention is:

The sample installation and debugging, carry out in the steps below:

(1) 3 types producing same producer, same batch, specification, in the identical tank for excrement pan accessory of size into As one group, usage mode can be pressed or be pushed up for side by (one-shot formula or double rush formula) water valve sample；

(2) it is equipped with and meets standard GB/T 26730-2011 " sanitary ware closet gravity type flushometer and sanitary ware Rack " technical requirements standard water tank or meet the flush box of closet requirement (its each component meet GB 26730-2011 Middle associated specifications), standard water tank inner cavity is having a size of length × width × height: 400mm × 175mm × 300mm；Standard water tank or Opposite water level after each component installation of flush box (not including concealed water tank) meets the 5.4.1 articles requirement, concealed water tank Opposite water level after each component installation meets the 5.4.10.2 articles requirement；

(3) inlet valve sample is mounted on inside test water tank referring to the operation instruction of factory, for being equipped with moisturizing dress The inlet valve set, water supply pipe are securely fixed on inlet valve and indicate specified moisturizing ratio, and rate of water make-up can satisfy closet water Envelope, which is replied, to be required；According to the 5.2.3 articles, the 5.2.4 articles and the 5.2.8 articles regulation, closet water to be measured in GB 26730-2011 Case inlet valve sample flow of inlet water under 0.05MPa dynamic pressure is not less than 0.05L/s, the flow of inlet water under 0.50MPa dynamic pressure No more than 0.33L/s；After static pressure and dynamic pressure seal tightness test, cistern water level lifting height is not more than 8mm, and intakes Without visible water clock after valve closing；Inlet valve can automatically open when draining to specified altitude, can close automatically after water inlet to working water level It closes, the working water level difference in height of continuous 5 water inlets is not more than 5mm；

(4) it is installed when with the matching used toilet seat of water tank for assembling inlet valve sample to be measured not close to any sidewalls When, if tested above semi-anechoic room's reflecting surface in the acoustic enviroment of proximate freedom field, test water tank can be passed through to branch Support rack is directly placed in ground center, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and really It is normal to protect pre-washing function.If tested in rigid plane test cabinet or dedicated reverberation chamber, test water tank can be passed through to branch Support rack is placed on ground, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and makes itself and room Distance is not less than 1.0m to interior any one side between the walls；Ensure that pre-washing function is normal simultaneously；

It (5), can be in rigid walls when mounted against a wall with the matching used toilet seat of water tank of assembly inlet valve sample to be measured It is tested in face test cabinet or dedicated reverberation chamber, test water tank is directly placed on ground by frames, water is not added Case lid；Make height 450mm of the water tank bottom apart from flooring, the water tank back side and lean between the walls apart from for 15cm ± 5cm, and its distance between its indoor excess-three sidewalls is made to be not less than 1.5m；Ensure that pre-washing function is normal simultaneously；

It (6), can be in rigidity when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured by corner It is tested in wall surface test cabinet or dedicated reverberation chamber, test water tank is directly placed on ground by frames, is not added Tank lid；Make height 450mm of the water tank bottom apart from flooring, the water tank back side and side and leans on 33

Distance is 15cm ± 5cm between the walls, and makes it with indoor in addition two sides between the walls apart from not less than 1.5m； Ensure that pre-washing function is normal simultaneously.

The determination on the sound source reference body and parallelepiped measurement surface, carries out in the steps below:

(1) determination of water intake valve noise source reference body shape and size: according to GB/T 3767-2016 " acoustics sound Platen press measures the engineering method of proximate freedom field above Sound Power Level of Noise Source harmony energy level reflecting surface " in the 7.1st article of related rule It is fixed, it is set using positions and dimensions of the three-dimensional coordinate system to sound source reference body；For with assemble inlet valve sample to be measured The different mounting means of the matching used ceramic pedestal pan of water tank, with sound source reference body and its in neighboring reflection plane As coordinate origin O, trunnion axis x and y are parallel with the length of reference body and width respectively at the center of the formed cabinet of mirror image.With test Length l of the horizontal width of water tank as sound source reference body₁, using the horizontal length of test water tank as the width of sound source reference body l₂, using test water tank working water level line-spacing vertical range from the ground as the height l of sound source reference body₃.Corresponding to different surveys Try environmental condition, the characteristic size d of sound source reference body₀Respectively [(l₁/2)²+(l₂/2)²+l₃ ²]^1/2(plane of reflection), [l₁ ²+(l₂/2)²+l₃ ²]^1/2(two planes of reflection) and [l₁ ²+l₂ ²+l₃ ²]^1/2(three planes of reflection), unit are rice (m)；

(2) determination of parallelepiped measurement surface and its microphone position array: according to standard GB/T 3767-2016 In the 7.2.4 articles and the 8.1.2 articles relevant regulations, test used by parallelepiped measurement surface and sound source reference body have There are the coordinate origin and face shaping of same orientation, i.e., area is S, envelope water intake valve noise source to be measured, each side are parallel to The side of reference body and an imaginary parallelepiped for being d with reference body distance, wherein d >=1.0m.

If with the matching used toilet seat of water tank of inlet valve sample to be measured is assembled during installation not close to any one side Wall, then the microphone position array co-ordinates on parallelepiped measurement surface are shown in Table 1, and area S is calculated according to formula (1):

S=4 (ab+bc+ca) ... ... ... ... ... ... ... ... ... (1)

In formula: a=0.5l₁+ d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃The respectively length and width of sound source reference body And height；Measure distance d=1.0m.

1 inlet valve sample of table is located at the parallelepiped on a plane of reflection and measures surface microphone position array co-ordinates

Microphone position

1

2

3

4

5

6

7

8

9

x

a

0

- a

0

a

- a

a

0

y

0

b

0

- b

b

- b

0

z

0.5c

c

If mounted against a wall with the matching used toilet seat of water tank of assembly inlet valve sample to be measured, parallelepiped is surveyed The microphone position array co-ordinates in scale face are shown in Table 2, and area S is calculated according to formula (2):

S=2 (2ab+bc+2ca) ... ... ... ... ... ... ... ... (2)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃The respectively length of sound source reference body It is (distance from wall to front end face), wide and high；Measure distance d=1.0m.

2 inlet valve sample of table is located at the parallelepiped on two planes of reflection and measures surface microphone position array co-ordinates

Microphone position

1

2

3

4

5

6

x

2a

a

2a

a

y

0

b

- b

b

-b

0

z

0.5c

c

If installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured by corner, parallelepiped The microphone position array co-ordinates on measurement surface are shown in Table 3, and area S is calculated according to formula (3):

S=2 (2ab+bc+ca) ... ... ... ... ... ... ... (3)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ 0.5d, c=l₃+d；Wherein l₁、l₂、l₃Respectively sound source reference body Length and width and height (the long l of reference body₁With wide l₂, i.e., from two face walls to the distance of corresponding reference body opposite face)；Measure distance d =1.0m.

3 inlet valve sample of table is located at the parallelepiped on three planes of reflection and measures surface microphone position array co-ordinates

Microphone position	1	2	3	4
					x	2a	a	2a	a
y	-b	-2b	- 2b	-b
					z	0.5c	0.5c	c	c

The sound-pressure-level measurement carries out in the steps below:

(1) except the test water tank and its frames, tripod for retaining 1 assembly inlet valve sample to be measured etc. is necessary real It tests outside utensil, remaining article in test cabinet is all moved away from, must not have supernumerary on the scene in test cabinet；Experimental implementation person is not The clothing of obvious sound absorption characteristics must be dressed；Using through assay approval thermometer and barometer to testing indoor Air Temperature Degree and atmospheric pressure are measured and record；

(2) before testing intaking valve for toilet cistern sample, test water tank is measured with straight steel ruler and square first Size l₁、l₂、l₃And it records；According to plane of reflection quantity involved by mating toilet seat mounting means, the sky of sound source reference body is determined Between position and calculate its characteristic size d₀；The applicable parallelepiped envelope sound source measurement surface of selection and calculate its size a, b,c.Surface microphone position array is measured according to selected parallelepiped, calculate measuring point coordinate and is recorded；

(3) 1 type instrument requirements in GB/T 3785.1-2010 should be met by measuring sound level meter used, and the re-testing periods are no more than 2 Year；Filter meets 1 type instrument requirements in IEC 61260:1995, and calibration cycle is no more than 1 year.Before each on-test and After, using meeting the acoustic calibrator of 1 grade of accuracy requirement in GB/T 15173 within the scope of sound level meter measurement frequency It is verified in one or more frequencies；It reads difference and is not more than 0.5dB；

(4) intaking valve for toilet cistern water inlet noise test cabinet can be semi-anechoic room or reverberation chamber, it is ensured that test cabinet Nei Keli With spatial volume Pass Test water tank and its installation requirement of frames, and have corresponding to/drainage condition, test is used The dynamic pressure of water is controllable；Wherein background noise is not more than 16dB (A) in semi-anechoic room, is capable of providing approximate above reflecting surface The acoustic condition of free field, re-testing periods are no more than 5 years；Background noise is not more than 25dB (A) in reverberation chamber, and the reverberation time is situated between In within the scope of 5s~6s；

(5) in the test cabinet for meeting above-mentioned requirements, microphone position array in surface is measured according to selected parallelepiped, Measuring point coordinate is positioned；Tripod is moved at point position simultaneously and the sound level meter that will be provided with associated acoustic performance is set In its top holder, it is ensured that sound wave incident angle is identical when microphone orientation is calibrated with it and is perpendicularly oriented to measurement surface；

(6) 10s starts timing after inlet valve unlatching, until inlet valve is closed naturally, believes in this, as sound level meter audio frequency Number acquisition the time of integration；If inlet valve sample moisturizing period to be measured (half punching or Quan Chong) is less than 30s, the time of integration with 20s meter.Selected parallelepiped, which is measured, using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter measures surface The cumulative percent time average sound pressure level L of upper ambient noise_pAi(B)(50), continuously measure 3 times, take in each microphone position Its arithmetic mean of instantaneous value as ambient noise at the position sound-pressure-level measurement value and record.If at each position measured by 3 times The difference of sound pressure level is greater than 0.5dB, then re-measures and record；

(7) test dynamic pressure is adjusted to 0.30MPa ± 0.05MPa, is required according to rate of water make-up to be measured, by test water tank In water emptying；And 10s starts timing after intaking again, until inlet valve is closed naturally, believes in this, as sound level meter audio frequency Number acquisition the time of integration；If inlet valve sample moisturizing period to be measured (half punching or Quan Chong) is less than 30s, the time of integration with 20s meter.Selected parallelepiped, which is measured, using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter measures surface The cumulative percent time average sound pressure level L ' of upper intaking valve for toilet cistern water inlet noise_pAi(ST)(50), in each microphone position Continuous measurement 3 times takes its arithmetic mean of instantaneous value as the sound-pressure-level measurement value for noise of intaking at the position and records.If each position The difference for setting sound pressure level measured by locating 3 times is greater than 0.5dB, then re-measures；The dynamic pressure intake every time, moisturizing are recorded simultaneously Amount and moisturizing period.

The acoustic power level calculates, and carries out in the steps below:

(1) calculation formula selects: referring to relevant regulations in GB/T 3767-2016, the meter of test parameter involved by this patent It is as follows to calculate formula:

If △ L_pA(50)> 15dB, then without carrying out background noise modification；If 6dB≤△ L_p(50)≤ 15dB, then according to formula (7) it is modified.

K_1A=-10lg (1-10^{-0.1△LpA(50)})…………………………………………(7)

K_2A=l0lg (l+4S/A) ... ... ... ... ... ... ... ... ... ... (8)

Work as K_2AWhen≤4dB, the measurement done according to this patent method is effective；Wherein semi-anechoic room and reverberation chamber room Absorption calculation formula is respectively as follows:

A=α S_ν………………………………………………………………………(9)

A=0.16V/T_n……………………………………………………………………(10)

L_WA _ref,atm(50)=L_WA(50)+C₁+C₂……………………………………………(15)

In formula:

--- in the specific moisturizing period, the water intake valve noise measured on surface is measured in parallelepiped A weighted cumulative percent time average sound pressure level mean value, unit be decibel (dB)；

L′_pAi(ST)(50)--- in the specific moisturizing period, measured at parallelepiped measurement i-th of surface microphone position Water intake valve noise A weighted cumulative percent time average sound pressure level, unit be decibel (dB)；

N_M--- parallelepiped measures surface microphone position number；

--- in the specific moisturizing period, the A weighted of the ambient noise measured on parallelepiped measurement surface Cumulative percent time average sound pressure level mean value, unit are decibel (dB)；

L_pAi(B)(50)--- in the specific moisturizing period, measured at parallelepiped measurement i-th of surface microphone position Ambient noise A weighted cumulative percent time average sound pressure level, unit be decibel (dB)；

K_1A--- background noise modification value；

K_2A--- test Environment Correction Value；

S --- parallelepiped measures the area on surface, and unit is square metre (m²)；

A --- in test cabinet at 1kHz frequency room equivalent absorption area, unit be square metre (m²)；

The A weighted average sound absorption coefficient of α --- test cabinet room surface, numberical range is referring to GB/T 3767-2016 Middle Table A .1；

S_ν--- the gross area (wall, floor, ceiling) of test cabinet room boundaries, unit are square metre (m²)；

V --- test room volume, unit are cubic meter (m³)；

T_n--- the A weighted measured or frequency band reverberation time, unit are the second (s)；

--- in the specific moisturizing period, the inlet valve sample water inlet measured through parallelepiped measurement surface method is made an uproar The A weighted cumulative percent time average sound pressure level of sound, unit are decibel (dB)；

L_WA(50)--- under the meteorological condition in testing time and place, each inlet valve sample is within the specific moisturizing period The water inlet noise A weighted cumulative percent acoustic power level measured through parallelepiped measurement surface method, unit are decibel (dB)；

S₀=1m²；

C₁--- the function of air characteristics impedance under the meteorological condition in testing time and place；

C₂--- standard meteorological conditions will be converted to relative to the practical acoustical power under testing time and place meteorological condition The radiation impedance correction value of lower acoustical power；

p_s--- the atmospheric pressure of testing time and place, unit are kPa (kPa)；

p_s,0--- standard atmospheric pressure, 101.325kPa；

The air themperature of θ --- testing time and place, unit are degree Celsius (DEG C)；

θ₀=314K；

θ₁=296K；

L_{WA ref,atm(50)}--- under the standard meteorological conditions that atmospheric pressure is 101.325kPa, temperature is 23.0 DEG C, each The A weighted cumulative percent acoustic power level of inlet valve sample water inlet noise, unit are decibel (dB)；

--- the average value of the A weighted cumulative percent acoustic power level of every group of inlet valve sample water inlet noise, unit For decibel (dB)；

L_WA(50)1、L_WA(50)2、L_WA(50)3--- the A weighted cumulative percent sound of every group of three inlet valve samples water inlet noise Power stage, unit are decibel (dB)；

--- under the standard meteorological conditions that atmospheric pressure is 101.325kPa, temperature is 23.0 DEG C, every group The average value of the A weighted cumulative percent acoustic power level of inlet valve sample water inlet noise, unit are decibel (dB)；

L_{WA ref,atm(50)1}、L_{WA ref,atm(50)2}、L_{WA ref,atm(50)3}--- at 23.0 DEG C of atmospheric pressure 101.325kPa, temperature Standard meteorological conditions under, the A weighted cumulative percent acoustic power level of every group of inlet valve sample water inlet noise, unit is decibel (dB)；

(2) data revision of the convention requirement: when the A weighted cumulative percent of intaking valve for toilet cistern water inlet noise and ambient noise Between average sound pressure level L '_pAi(ST)(50)And L_pAi(B)(50)Measurement result retains one decimal place effective digital, mean valueWithAnd the A weighted cumulative percent acoustic power level L of water intake valve noise_WA(50)Calculated result take Integer；

(3) uncertainty of measurement: this patent method provides intaking valve for toilet cistern water inlet on parallelepiped measurement surface The repeatability standard deviation σ of noise A weighted cumulative percent time average sound pressure level measurement result_omcUpper limit value is not more than 1.5dB.Related content in reference standard GB/T 3767-2016 tests people by same position within a complete moisturizing period Member uses same sound level meter, to same selected by the same part intaking valve for toilet cistern sample of the same installed position Parallelepiped measures A weighted cumulative percent time average sound pressure level average value on surfaceOrCarrying out 6 duplicate measurements, (for each duplicate measurements, inlet valve sample, which must be reinstalled and be adjusted, to be determined Position), and background noise modification is carried out to measurement result.Repeatability standard deviation σ_omcCalculation formula are as follows:

In formula:

--- intaking valve for toilet cistern intake time duplicate measurements of noise jth and after background noise modification parallel six The average value of A weighted cumulative percent time average sound pressure level on the bulk measurement surface of face；

--- the Arithmetical average sound pressure grade being calculated by all repeated measuring results.

The evaluation of result calculates, and carries out in the steps below:

(1) according to national environmental protection specification and products standards requirement, following classification criterion is taken:

Very low for water inlet noise, environmental-protecting performance is excellent；

Very low for water inlet noise, environmental-protecting performance is good；

Lower for water inlet noise, environmental-protecting performance is preferable；

Higher to rinse noise, environmental-protecting performance is poor；

Very high to rinse noise, environmental-protecting performance is inferior.

(2) as some sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)3 sample water inlets are organized greater than this Noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10% when, need to extract one group of sample again It repeats to test；Calculate front and back two groups of inlet valve samples under set dynamic pressure using sound level meter A weighted equivalent sound level it is slow when Between character of weighting " S " through the water inlet noise A weighted cumulative percent acoustic power level that measures of parallelepiped measurement surface method L_WA(50)Arithmetic mean of instantaneous valueThe noise A weighted cumulative percent acoustic power level L if some sample is intake_WA(50)It is greater than This two groups of 6 samples water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10%, then abandon It；Take remaining inlet valve sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous valueAs This group of intaking valve for toilet cistern sample water inlet noise rating index.

Detailed description of the invention

Fig. 1 is that each component installs opposite water level schematic diagram inside flush box；

In figure: 38mm >=h₁>=10mm, h₂>=25mm, h₃>=5mm, h₄>=5mm, h₅≤20mm；

Fig. 2 is that each component installs opposite water level schematic diagram inside concealed water tank；

In figure: h₁>=15mm, h₂>=25mm, h₃>=5mm, h₄>=5mm, h₅≤20mm；

Fig. 3 is the water intake valve noise source reference body schematic diagram in the present invention on a plane of reflection；

In figure: d₀- sound source characteristics size, m；l₁The length of-reference body, m；l₂The width of-reference body, m；l₃- benchmark The height of body, m；O-coordinate origin；

Fig. 4 is the water intake valve noise source reference body schematic diagram in the present invention on two planes of reflection；

Fig. 5 is the water intake valve noise source reference body schematic diagram in the present invention on three planes of reflection；

Fig. 6 be the water intake valve noise source in the present invention on a plane of reflection parallelepiped measurement surface and its Microphone position array schematic diagram；

In figure: ●-microphone position；A-reflecting surface；B-reference body；2a-measurement length surface, m；2b-measurement Face width, m；C-measurement apparent height, m；D-measurement distance, m；l₁- benchmark body length, m；l₂- reference body width, m； l₃- reference body height, m；

Fig. 7 be the water intake valve noise source in the present invention on two planes of reflection parallelepiped measurement surface and its Microphone position array schematic diagram；

In figure: ●-microphone position；B-reference body；2a-measurement length surface, m；2b-measurement face width, m； C-measurement apparent height, m；D-measurement distance, m；l₁- benchmark body length, m；l₂- reference body width, m； l₃- reference body Highly, m；

Fig. 8 be the water intake valve noise source in the present invention on three planes of reflection parallelepiped measurement surface and its Microphone position array schematic diagram；

Specific embodiment

With reference to the accompanying drawing and preferred embodiment the present invention will be described in detail so that advantages and features of the invention energy It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.

The present embodiment by usage mode be top press, double punchings, the nominal rate of water make-up of folk art term is respectively the inlet valve sample of 6L and 3L Be mounted on in the matching used flush box of closet；It is said by taking noise measuring of intaking under the conditions of it rushes rate of water make-up entirely as an example It is bright.

Specific detection method carries out in the steps below:

(1) sample installation and debugging

1.1 sample sizes, specification

By inlet valve in same producer, 3 types of same batch production, specification, the identical tank for excrement pan accessory of size As one group, usage mode can be pressed or be pushed up for side by (one-shot formula or double rush formula) sample.

The installation of 1.2 samples

Outfit meets standard GB/T 26730-2011 " sanitary ware closet gravity type flushometer and sanitary ware rack " The standard water tank of technical requirements meets the flush box of closet requirement (its each component meets phase in GB 26730-2011 Close technical requirements), standard water tank inner cavity is having a size of length × width × height: 400mm × 175mm × 300mm；Standard water tank or flushing Opposite water level after each component installation of water tank (not including concealed water tank) meets the 5.4.1 articles requirement, each portion of concealed water tank Opposite water level after part installation meets the 5.4.10.2 articles requirement.

The debugging of 1.3 samples

Inlet valve sample is mounted on inside test water tank referring to the operation instruction of factory, for being equipped with water replanishing device Inlet valve, water supply pipe are securely fixed on inlet valve and indicate specified moisturizing ratio, and rate of water make-up can satisfy closet water seal and return It is multiple to require.According in GB 26730-2011 the 5.2.3 articles, the 5.2.4 articles and the 5.2.8 articles regulation, tank for excrement pan to be measured into Water valve sample under 0.05MPa dynamic pressure flow of inlet water not less than 0.05L/s, flow of inlet water is little under 0.50MPa dynamic pressure In 0.33L/s；After static pressure and dynamic pressure seal tightness test, cistern water level lifting height is not more than 8mm, and inlet valve closes Without visible water clock after closing；Inlet valve can automatically open when draining to specified altitude, can be automatically closed after water inlet to working water level, The working water level difference in height of continuous 5 water inlets is not more than 5mm.After each component installation of flush box (not including concealed water tank) Opposite water level should meet Fig. 1 requirement, the opposite water level after each component installation of concealed water tank should meet Fig. 2 requirement.

1.4 Sample location

1.4.1 pacify when with the matching used toilet seat of water tank for assembling inlet valve sample to be measured not close to any sidewalls When dress, if tested in the acoustic enviroment of proximate freedom field above semi-anechoic room's reflecting surface, test water tank can be passed through Frames are directly placed in ground center, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and Ensure that pre-washing function is normal.If tested in rigid plane test cabinet or dedicated reverberation chamber, test water tank can be passed through Frames are placed on ground, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and make its with Distance is not less than 1.0m to indoor any one side between the walls；Ensure that pre-washing function is normal simultaneously.

It 1.4.2, can be in rigidity when mounted against a wall with the matching used toilet seat of water tank of assembly inlet valve sample to be measured It is tested in wall surface test cabinet or dedicated reverberation chamber, test water tank is directly placed on ground by frames, is not added Tank lid；Make height 450mm of the water tank bottom apart from flooring, the water tank back side and lean between the walls apart from for 15cm ± 5cm, and its distance between its indoor excess-three sidewalls is made to be not less than 1.5m；Ensure that pre-washing function is normal simultaneously.

It 1.4.3, can be rigid when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured by corner Property wall surface test cabinet or dedicated reverberation chamber in tested, test water tank is directly placed on ground by frames, no Add tank lid；Make height 450mm of the water tank bottom apart from flooring, the water tank back side and side and lean between the walls away from From for 15cm ± 5cm, and make its with indoor in addition two sides between the walls distance not less than 1.5m；Ensure pre-washing function just simultaneously Often.

(2) determination on sound source reference body and parallelepiped measurement surface

The determination of 2.1 water intake valve noise source reference body shape and size

According to GB/T 3767-2016, " acoustic sound pressure method is measured above Sound Power Level of Noise Source harmony energy level reflecting surface The engineering method of proximate freedom field " in the 7.1st article of relevant regulations, position and ruler using three-dimensional coordinate system to sound source reference body The setting of little progress row；For the mounting means different from the matching used ceramic pedestal pan of water tank for assembling inlet valve sample to be measured, The center of the formed cabinet of mirror image using sound source reference body and its in neighboring reflection plane is as coordinate origin O, trunnion axis x It is parallel with the length of reference body and width respectively with y.Using the horizontal width of test water tank as the length l of sound source reference body₁, with examination The horizontal length for testing water tank is the width l of sound source reference body₂, vertical range with test water tank working water level line-spacing from the ground For the height l of sound source reference body₃.Corresponding to different test environment conditions, the characteristic size d of sound source reference body₀Respectively [(l₁/2)²+(l₂/2)²+l₃ ²]^1/2(plane of reflection), [l₁ ²+(l₂/2)²+l₃ ²]^1/2(two planes of reflection) and [l₁ ²+l₂ ² +l₃ ²]^1/2(three planes of reflection), unit are rice (m).

2.2 parallelepipeds measure the selection on surface and the determination of microphone position array

Parallelepiped measures the determination of surface and its microphone position array: according in standard GB/T 3767-2016 the 7.2.4 article, and the 8.1.2 articles relevant regulations, the measurement surface of parallelepiped used by testing and sound source reference body are with phase With the coordinate origin and face shaping in orientation, i.e., area is S, envelope water intake valve noise source to be measured, each side are parallel to benchmark The side of body and an imaginary parallelepiped for being d with reference body distance, wherein d >=1.0m.

2.2.1 if according to the present embodiment when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured In the 1.4.1 articles positioned, corresponding parallelepiped measurement surface and its microphone position array are as shown in figure 4, measuring point Coordinate is shown in Table 1, wherein measuring distance d=1.0m；The area S for measuring surface is calculated according to formula (1):

S=4 (ab+bc+ca) ... ... ... ... ... ... ... ... ... (1)

In formula: a=0.5l₁+ d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃The respectively length and width of sound source reference body And height.

Microphone position

1

2

3

4

5

6

7

8

9

x

a

0

- a

0

a

- a

a

0

y

0

b

0

- b

b

- b

0

z

0.5c

c

2.2.2 if according to the present embodiment when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured In the 1.4.2 articles positioned, corresponding parallelepiped measurement surface and its microphone position array are as shown in figure 5, measuring point Coordinate is shown in Table 2, wherein measuring distance d=1.0m；The area S for measuring surface is calculated according to formula (2):

S=2 (2ab+bc+2ca) ... ... ... ... ... ... ... (2)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃The respectively length of sound source reference body It is (distance from wall to front end face), wide and high.

Microphone position

1

2

3

4

5

6

x

2a

a

2a

a

y

0

b

- b

b

-b

0

z

0.5c

c

2.2.3 if according to the present embodiment when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured In the 1.4.3 articles positioned, corresponding parallelepiped measurement surface and its microphone position array are as shown in fig. 6, measuring point Coordinate is shown in Table 3, wherein measuring distance d=1.0m；The area S for measuring surface is calculated according to formula (3):

S=2 (2ab+bc+ca) ... ... ... ... ... (3)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ 0.5d, c=l₃+d；Wherein l₁、l₂、l₃Respectively sound source reference body Length and width and height (the long l of reference body₁With wide l₂, i.e., from two face walls to the distance of corresponding reference body opposite face).

Microphone position	1	2	3	4
					x	2a	a	2a	a
y	-b	-2b	- 2b	-b
					z	0.5c	0.5c	c	c

(3) sound-pressure-level measurement

3.1 except necessary experiments such as the test water tanks and its frames, tripod for retaining 1 assembly inlet valve sample to be measured Outside utensil, remaining article in test cabinet is all moved away from, there must not be supernumerary on the scene in test cabinet；Experimental implementation person must not Wearing has the clothing of obvious sound absorption characteristics；Using through assay approval thermometer and barometer to testing indoor air themperature It is measured and records with atmospheric pressure.

Before 3.2 pairs of intaking valve for toilet cistern samples are tested, test water tank is measured with straight steel ruler and square first Size l₁、l₂、l₃And it records；According to plane of reflection quantity involved by mating toilet seat mounting means, the sky of sound source reference body is determined Between position and calculate its characteristic size d₀；The applicable parallelepiped envelope sound source measurement surface of selection and calculate its size a, b,c.Surface microphone position array is measured according to selected parallelepiped, calculate measuring point coordinate and is recorded.

3.3, which measure sound level meter used, should meet 1 type instrument requirements in GB/T 3785.1-2010, and the re-testing periods are no more than 2 Year；Filter meets 1 type instrument requirements in IEC 61260:1995, and calibration cycle is no more than 1 year.Before each on-test and After, using meeting the acoustic calibrator of 1 grade of accuracy requirement in GB/T 15173 within the scope of sound level meter measurement frequency It is verified in one or more frequencies；It reads difference and is not more than 0.5dB.

3.4 intaking valve for toilet cistern water inlet noise test cabinet can be semi-anechoic room or reverberation chamber, it is ensured that test cabinet Nei Keli With spatial volume Pass Test water tank and its installation requirement of frames, and have corresponding to/drainage condition, test is used The dynamic pressure of water is controllable；Wherein background noise is not more than 16dB (A) in semi-anechoic room, is capable of providing approximate above reflecting surface The acoustic condition of free field, re-testing periods are no more than 5 years；Background noise is not more than 25dB (A) in reverberation chamber, and the reverberation time is situated between In within the scope of 5s~6s.

3.5 in the test cabinet for meeting above-mentioned requirements, measures surface microphone position array according to selected parallelepiped, Measuring point coordinate is positioned；Tripod is moved at point position simultaneously and the sound level meter that will be provided with associated acoustic performance is set In its top holder, it is ensured that sound wave incident angle is identical when microphone orientation is calibrated with it and is perpendicularly oriented to measurement surface.

3.6 after inlet valve unlatching 10s start timing, until inlet valve closes naturally, in this, as sound level meter audio frequency letter Number acquisition the time of integration；If inlet valve sample moisturizing period to be measured (half punching or Quan Chong) is less than 30s, the time of integration with 20s meter.Selected parallelepiped, which is measured, using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter measures surface The cumulative percent time average sound pressure level L of upper ambient noise_pAi(B)(50), continuously measure 3 times, take in each microphone position Its arithmetic mean of instantaneous value as ambient noise at the position sound-pressure-level measurement value and record.If at each position measured by 3 times The difference of sound pressure level is greater than 0.5dB, then re-measures and record.

3.7 adjust test dynamic pressure to 0.30MPa ± 0.05MPa, are required according to rate of water make-up to be measured, by test water tank In water emptying；And 10s starts timing after intaking again, until inlet valve is closed naturally, believes in this, as sound level meter audio frequency Number acquisition the time of integration；If inlet valve sample moisturizing period to be measured (half punching or Quan Chong) is less than 30s, the time of integration with 20s meter.Selected parallelepiped, which is measured, using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter measures surface The cumulative percent time average sound pressure level L ' of upper intaking valve for toilet cistern water inlet noise_pAi(ST)(50), in each microphone position Continuous measurement 3 times takes its arithmetic mean of instantaneous value as the sound-pressure-level measurement value for noise of intaking at the position and records.If each position The difference for setting sound pressure level measured by locating 3 times is greater than 0.5dB, then re-measures；The dynamic pressure intake every time, moisturizing are recorded simultaneously Amount and moisturizing period.

(4) result calculates

The selection of 4.1 calculation formula: referring to relevant regulations in GB/T 3767-2016, test parameter involved by the present embodiment Calculation formula is as follows:

K_1A=-10lg (1-10^{-0.1△LpA(50)})……………………………………………(7)

K_2A=l0lg (l+4S/A) ... ... ... ... ... ... ... ... ... ... (8)

A=α S_ν……………………………………………………………………(9)

A=0.16V/T_n………………………………………………………………(10)

L_{WA ref,atm(50)}=L_WA(50)+C₁+C₂…………………………………………………(15)

In formula:

N_M--- parallelepiped measures surface microphone position number；

K_1A--- background noise modification value；

K_2A--- test Environment Correction Value；

V --- test room volume, unit are cubic meter (m³)；

S₀=1m²；

p_s,0--- standard atmospheric pressure, 101.325kPa；

θ₀=314K；

θ₁=296K；

L_{WA ref,atm(50)1}、L_{WA ref,atm(50)2}、L_{WA ref,atm(50)3}--- at 23.0 DEG C of atmospheric pressure 101.325kPa, temperature Standard meteorological conditions under, the A weighted cumulative percent acoustic power level of every group of inlet valve sample water inlet noise, unit is decibel (dB)。

4.2 data revisions of the convention requirement: when the A weighted cumulative percent of intaking valve for toilet cistern water inlet noise and ambient noise Between average sound pressure level L '_pAi(ST)(50)And L_pAi(B)(50)Measurement result retains one decimal place effective digital, mean valueWithAnd the A weighted cumulative percent acoustic power level L of water intake valve noise_WA(50)Calculated result take Integer.

4.3 uncertainties of measurement: this patent method provides intaking valve for toilet cistern water inlet on parallelepiped measurement surface The repeatability standard deviation σ of noise A weighted cumulative percent time average sound pressure level measurement result_omcUpper limit value is not more than 1.5dB.Related content in reference standard GB/T 3767-2016 tests people by same position within a complete moisturizing period Member uses same sound level meter, to same selected by the same part intaking valve for toilet cistern sample of the same installed position Parallelepiped measures A weighted cumulative percent time average sound pressure level average value on surfaceOrCarrying out 6 duplicate measurements, (for each duplicate measurements, inlet valve sample, which must be reinstalled and be adjusted, to be determined Position), and background noise modification is carried out to measurement result.Repeatability standard deviation σ_omcCalculation formula are as follows:

In formula:

(5) performance judgment

5.1, according to national environmental protection specification and products standards requirement, take following classification criterion:

Very low for water inlet noise, environmental-protecting performance is good；

Higher to rinse noise, environmental-protecting performance is poor；

Very high to rinse noise, environmental-protecting performance is inferior.

5.2 as some sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)3 sample water inlets are organized greater than this Noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10% when, need to extract one group of sample again It repeats to test；Calculate front and back two groups of inlet valve samples under set dynamic pressure using sound level meter A weighted equivalent sound level it is slow when Between character of weighting " S " through the water inlet noise A weighted cumulative percent acoustic power level that measures of parallelepiped measurement surface method L_WA(50)Arithmetic mean of instantaneous valueThe noise A weighted cumulative percent acoustic power level L if some sample is intake_WA(50)It is greater than This two groups of 6 samples water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10%, then abandon It；Take remaining inlet valve sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous valueAs This group of intaking valve for toilet cistern sample water inlet noise rating index.

Test facilities, instrument and equipment used in the present embodiment and test equipment:

(1) test facilities

Semi-anechoic room: interior architecture dead size is 9.8m × 7.3m × 5.9m, and peace hangs useful space size after wedge absorber For 7.8m × 5.3m × 4.9m, dischargeable capacity 203m³, effective usable floor area is 41m².Using tile floor as individual reflection Plane, it is indoor except be equipped with accordingly to/drainage pipeline and air-conditioning in addition to again without other fixation means；When laboratory normal operation, week When enclosing interference without exception, chamber background noise is lower than 14.1dB (A)；The expanded uncertainty of sound pressure level measurements is U₉₅= (0.4~1.0) dB, k=2.

(2) testing equipment and equipment

2.1 sound level meters: Japanese Li Yin company production, can measure equivalent continuous acoustic pressure L at model NA-28_eq, performance meets 1 type integrating sound level meter provides in GB/T 3785, and filter meets the requirement of GB 3241；The spirit of noise analysis instrument preamplifier Sensitivity is that -27dB ± 2dB, A weighted linear operation range is 25dB~130dB, and it is 143dB that peak sound level, which measures the upper limit, inherently It is 17dB that noise A, which weights maximum value, and measurement frequency range is 10Hz~20kHz, sampling period 15.6ms.Every time before measurement Be all made of accuracy be ± 0.1dB sound calibration device chosen within the scope of test frequency 100Hz, 300Hz, 500Hz, The point such as 700Hz, 900Hz, 1000Hz carries out whole verification to correlated noise measuring system.

Sound pressure level uncertainty U=0.4dB~1.0dB (k=2)；Sound pressure level uncertainty U=at reference frequency 0.07dB (k=2)；The uncertainty of calibration result is U=1.0dB (k=2).

2.2 acoustic calibrators: the production of hundred million Europe instrumentation Co., Ltds, model AWA6221A, for the absolute of sound level meter Pressure calibration, acoustical behavior meet 1 grade of accuracy requirement in GB/T 15173；Nominal sound pressure level is 94dB and 114dB (with 20 μ On the basis of Pa), being applicable in frequency range is 1kHz~5Hz, and sound pressure level accuracy is ± 0.2dB (23 DEG C) and (- 10 DEG C of ± 0.3dB ~50 DEG C), total harmonic distortion≤1% when 94dB.

2.3 rulers: scale division value is straight steel ruler, the square of 1mm.

2.4 thermometers: range is 0 DEG CScale division value is 0.2 DEG C.

2.5 aneroid pressure meters: measurement range is 800hPa~1060hPa, and the indicating value limits of error are ± 1.0hPa.

2.6 stopwatches: precision 0.01s.

2.7 tripods: carbon fiber or aluminum alloy material, load-bearing 10kg or more, the 2.0m of maximum height containing holder.

The detection data and result of the present embodiment calculate:

In semi-anechoic room, using parallelepiped measurement surface method to the flushing water installed not close to any sidewalls The water inlet noise of inlet valve sample is tested in case, and coherent detection data and evaluation of result are shown in Table 4.

4 water intake valve noise measuring data of table (parallelepiped of a plane of reflection measures surface method)

The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent transformation made by bright specification and accompanying drawing content, is applied directly or indirectly in other relevant technical fields, and includes In scope of patent protection of the invention.

Claims

The noise detecting method 1. a kind of intaking valve for toilet cistern is intake, detecting step include: the installation of (1) sample and debugging；(2) sound Source reference body and parallelepiped measurement surface determine；(3) sound-pressure-level measurement；(4) acoustic power level calculating and ambient noise, test Environment and meteorological condition amendment；(5) evaluation；It is characterized in that, using the slow time of sound level meter A weighted equivalent sound level Character of weighting " S " measures on surface with cumulative percent acoustic power level L parallelepiped_WA(50)The tank for excrement pan of characterization is intake Valve water inlet noise carries out accurate quantitative detection, specific:

In sound-pressure-level measurement:

(1) before being measured to the water inlet noise of intaking valve for toilet cistern in semi-anechoic room or reverberation chamber, first according to GB/T3767- Phase in 2016 " engineering methods that acoustic sound pressure method measures proximate freedom field above Sound Power Level of Noise Source harmony energy level reflecting surface " Regulation is closed, for all kinds of typical installation requirements of intaking valve for toilet cistern sample, determines sound source base under the conditions of the different planes of reflection The positioning of quasi- body simultaneously calculates its sound source characteristics size d₀；Simultaneous selection and water intake valve noise source reference body are corresponding parallel Hexahedron measurement surface is simultaneously really sized, and specifies the coordinate of different measurement surface microphone position arrays；

(2) it in semi-anechoic room or reverberation chamber, is acquired using the specific moisturizing period of intaking valve for toilet cistern as sound signal The time of integration measures selected parallelepiped using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter and measures table The cumulative percent time average sound pressure level L of ambient noise on face_pAi(B)(50)；Then dynamic in the test of 0.30MPa ± 0.05MPa Under pressure condition, start inlet valve water replenishing device；For the different rate of water make-up of tank for excrement pan (half punching or Quan Chong) test request, In the specific moisturizing period, selected parallelepiped is measured using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter Measure the cumulative percent time average sound pressure level L ' of water intake valve noise on surface_pAi(ST)(50)；

In acoustic power level calculating:

According to related notion and calculation formula in GB/T 3767-2016, in the test dynamic pressure condition of 0.30MPa ± 0.05MPa Under, the time of integration acquired using the specific moisturizing period of intaking valve for toilet cistern as sound signal, by sound level meter selected flat The A weighted cumulative percent time average sound pressure level of the water inlet noise and ambient noise that are measured on row hexahedron measurement surface L′_pAi(ST)(50)And L_pAi(B)(50)As basic data, its corresponding time average sound pressure level mean value is calculatedWithAnd to background noise modification value K_1A, test Environment Correction Value K_2AAnd meteorological condition correction value C₁、C₂Influence into Row analysis is derived from the accumulative percentage of A weighted of each intaking valve for toilet cistern sample water inlet noise under the conditions of set dynamic pressure Number acoustic power level L_WA(50)And the average value of every group of sample water inlet noise A weighted cumulative percent acoustic power levelIt is bright simultaneously Really the corresponding data revision of the convention requires and uncertainty of measurement range；

In evaluation of result:

As some sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)3 sample water inlet noise A meters are organized greater than this Weigh cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10% when, need to extract again one group of sample repeat it is real It tests；And two groups of front and back intaking valve for toilet cistern sample is calculated under the conditions of set dynamic pressure, using the A weighted equivalent sound of sound level meter The water inlet noise cumulative percent acoustic power level that the slow time character of weighting " S " of grade measures through parallelepiped measurement surface method L_WA(50)Arithmetic mean of instantaneous valueThe noise A weighted cumulative percent acoustic power level L if some sample is intake_WA(50)Greater than this Two groups of 6 samples water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10%, then abandon it； Take remaining inlet valve sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous valueAs the group The evaluation index of intaking valve for toilet cistern sample water inlet noise.
2. the detection method of intaking valve for toilet cistern water inlet noise according to claim 1, which is characterized in that the sample Product installation and debugging, carry out in the steps below:

(1) by inlet valve sample in same producer, 3 types of same batch production, specification, the identical tank for excrement pan accessory of size As one group, usage mode can be pressed or be pushed up for side by (one-shot formula or double rush formula) product；

(2) it is equipped with and meets standard GB/T 26730-2011 " sanitary ware closet gravity type flushometer and sanitary ware rack " The standard water tank of technical requirements meets the flush box of closet requirement (its each component meets phase in GB 26730-2011 Close technical requirements), standard water tank inner cavity is having a size of length × width × height: 400mm × 175mm × 300mm；Standard water tank or flushing water Opposite water level after each component installation of case (not including concealed water tank) meets the 5.4.1 articles requirement, each component of concealed water tank Opposite water level after installation meets the 5.4.10.2 articles requirement；

(3) inlet valve sample is mounted on inside test water tank referring to the operation instruction of factory, for being equipped with water replanishing device Inlet valve, water supply pipe are securely fixed on inlet valve and indicate specified moisturizing ratio, and rate of water make-up can satisfy closet water seal and return It is multiple to require；According to the 5.2.3 articles, the 5.2.4 articles and the 5.2.8 articles regulation in GB 26730-2011, tank for excrement pan water inlet to be measured Valve sample under 0.05MPa dynamic pressure flow of inlet water not less than 0.05L/s, flow of inlet water is not more than under 0.50MPa dynamic pressure 0.33L/s；After static pressure and dynamic pressure seal tightness test, after cistern water level lifting height is not more than 8mm, and inlet valve is closed Without visible water clock；Inlet valve can automatically open when draining to specified altitude, can be automatically closed after water inlet to working water level, continuous 5 The working water level difference in height of secondary water inlet is not more than 5mm；

(4) when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured not close to any sidewalls, If tested above semi-anechoic room's reflecting surface in the acoustic enviroment of proximate freedom field, test water tank can be passed through support machine Frame is directly placed in ground center, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and ensures to rush It is normal to wash function.If tested in rigid plane test cabinet or dedicated reverberation chamber, test water tank can be passed through support machine Frame is placed on ground, and tank lid is not added；Make height 450mm of the water tank bottom apart from flooring, and appoints it with interior Distance is not less than 1.0m to what one side between the walls；Ensure that pre-washing function is normal simultaneously；

(5) it when mounted against a wall with the matching used toilet seat of water tank of assembly inlet valve sample to be measured, can be surveyed in rigid plane It is tested in examination room or dedicated reverberation chamber, test water tank is directly placed on ground by frames, tank lid is not added； Make height 450mm of the water tank bottom apart from flooring, the water tank back side and lean between the walls apart from for 15cm ± 5cm, and Its distance between its indoor excess-three sidewalls is set to be not less than 1.5m；Ensure that pre-washing function is normal simultaneously；

It (6), can be in rigid plane when being installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured by corner It is tested in test cabinet or dedicated reverberation chamber, test water tank is directly placed on ground by frames, water tank is not added Lid；Make height 450mm of the water tank bottom apart from flooring, the water tank back side and side and lean between the walls apart from for 15cm ± 5cm, and make it with indoor in addition two sides between the walls apart from not less than 1.5m；Ensure that pre-washing function is normal simultaneously.
3. the detection method of intaking valve for toilet cistern water inlet noise according to claim 1, which is characterized in that the sound The determination on source reference body and parallelepiped measurement surface, carries out in the steps below:

(1) determination of water intake valve noise source reference body shape and size: according to GB/T 3767-2016, " acoustic sound pressure method is surveyed Determine the engineering method of proximate freedom field above Sound Power Level of Noise Source harmony energy level reflecting surface " in the 7.1st article of relevant regulations, utilize Three-dimensional coordinate system sets the positions and dimensions of sound source reference body；Match for the water tank for assembling inlet valve sample to be measured The different mounting means of the ceramic pedestal pan used is covered, is formed with sound source reference body and its mirror image in neighboring reflection plane As coordinate origin O, trunnion axis x and y are parallel with the length of reference body and width respectively at the center of cabinet.It is wide with the level of test water tank Spend the length l as sound source reference body₁, using the horizontal length of test water tank as the width l of sound source reference body₂, with test water tank work Make the height l that vertical range of the water level line apart from ground is sound source reference body₃.Corresponding to different test environment conditions, sound source The characteristic size d of reference body₀Respectively [(l₁/2)²+(l₂/2)²+l₃ ²]^1/2(plane of reflection), [l₁ ²+(l₂/2)²+l₃ ²]^1/2 (two planes of reflection) and [l₁ ²+l₂ ²+l₃ ²]^1/2(three planes of reflection), unit are rice (m)；

(2) determination of parallelepiped measurement surface and its microphone position array: according in standard GB/T 3767-2016 the 7.2.4 article, and the 8.1.2 articles relevant regulations, the measurement surface of parallelepiped used by testing is with sound source reference body with identical The coordinate origin and face shaping in orientation, i.e. area are S, envelope water intake valve noise source to be measured, each side are parallel to reference body Side and be d with reference body distance an imaginary parallelepiped, wherein d >=1.0m.

If with the matching used toilet seat of water tank of inlet valve sample to be measured is assembled during installation not close to any sidewalls, Then the microphone position array co-ordinates on parallelepiped measurement surface are shown in Table 1, and area S is calculated according to formula (1):

S=4 (ab+bc+ca) ... ... ... ... ... ... ... ... ... (1)

In formula: a=0.5l₁+ d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃The respectively length and width and height of sound source reference body； Distance d=1.0m is measured,

1 inlet valve sample of table is located at the parallelepiped on a plane of reflection and measures surface microphone position array co-ordinates

Microphone position 1 2 3 4 5 6 7 8 9 x a 0 - a 0 a - a - a a 0 y 0 b 0 - b b b - b - b 0 z 0.5c 0.5c 0.5c 0.5c c c c c c

If mounted against a wall with the matching used toilet seat of water tank of assembly inlet valve sample to be measured, parallelepiped measures table The microphone position array co-ordinates in face are shown in Table 2, and area S is calculated according to formula (2):

S=2 (2ab+bc+2ca) ... ... ... ... ... ... ... ... ... (2)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ d, c=l₃+d；Wherein l₁、l₂、l₃Respectively the length of sound source reference body is (from wall Distance of the wall to front end face), it is wide and high；Measure distance d=1.0m.

2 inlet valve sample of table is located at the parallelepiped on two planes of reflection and measures surface microphone position array co-ordinates

Microphone position 1 2 3 4 5 6 x 2a a a 2a 2a a y 0 b - b b -b 0 z 0.5c 0.5c 0.5c c c c

If installed with the matching used toilet seat of water tank for assembling inlet valve sample to be measured by corner, parallelepiped measurement The microphone position array co-ordinates on surface are shown in Table 3, and area S is calculated according to formula (3):

S=2 (2ab+bc+ca) ... ... ... ... ... ... ... ... ... (3)

In formula: a=0.5l₁+ 0.5d, b=0.5l₂+ 0.5d, c=l₃+d；Wherein l₁、l₂、l₃Respectively the length of sound source reference body, Wide and height (the long l of reference body₁With wide l₂, i.e., from two face walls to the distance of corresponding reference body opposite face)；Distance d=1.0m is measured,

3 inlet valve sample of table is located at the parallelepiped on three planes of reflection and measures surface microphone position array co-ordinates.
4. the detection method of intaking valve for toilet cistern water inlet noise according to claim 1, which is characterized in that the sound It arbitrarily downgrades measurement, carries out in the steps below:

(1) except necessary experimental apparatus such as the test water tanks and its frames, tripod for retaining 1 assembly inlet valve sample to be measured Outside, remaining article in test cabinet is all moved away from, there must not be supernumerary on the scene in test cabinet；Experimental implementation person must not dress The clothing of obvious sound absorption characteristics；Using through assay approval thermometer and barometer to testing indoor air themperature and atmospheric pressure It is measured and records by force；

(2) before testing intaking valve for toilet cistern sample, first with the size of straight steel ruler and square measurement test water tank l₁、l₂、l₃And it records；According to plane of reflection quantity involved by mating toilet seat mounting means, the space orientation of sound source reference body is determined And calculate its characteristic size d₀；The applicable parallelepiped envelope sound source measurement surface of selection simultaneously calculates its size a, b, c.According to Selected parallelepiped measures surface microphone position array, calculates measuring point coordinate and records；

(3) 1 type instrument requirements in GB/T 3785.1-2010 should be met by measuring sound level meter used, and the re-testing periods are no more than 2 years；Filter Wave device meets 1 type instrument requirements in IEC 61260:1995, and calibration cycle is no more than 1 year.Before each on-test and after, Using meeting one or more of the acoustic calibrator of 1 grade of accuracy requirement in GB/T 15173 within the scope of sound level meter measurement frequency It is verified in a frequency；It reads difference and is not more than 0.5dB；

(4) intaking valve for toilet cistern water inlet noise test cabinet can be semi-anechoic room or reverberation chamber, it is ensured that using sky in test cabinet Between volume Pass Test water tank and its installation requirement of frames, and have it is corresponding to/drainage condition, test water it is dynamic Pressure adjustable control；Wherein background noise is not more than 16dB (A) in semi-anechoic room, is capable of providing proximate freedom field above reflecting surface Acoustic condition, re-testing periods are no more than 5 years；Background noise is not more than 25dB (A) in reverberation chamber, and the reverberation time is between 5s~6s model In enclosing；

(5) in the test cabinet for meeting above-mentioned requirements, microphone position array in surface is measured according to selected parallelepiped, to survey Point coordinate is positioned；Tripod is moved at point position simultaneously and the sound level meter that will be provided with associated acoustic performance is placed in Qi Ding Portion's holder, it is ensured that sound wave incident angle is identical when microphone orientation is calibrated with it and is perpendicularly oriented to measurement surface；

(6) 10s starts timing after inlet valve unlatching, until inlet valve is closed naturally, adopts in this, as sound level meter sound signal The time of integration of collection；If inlet valve sample moisturizing period (half punching or Quan Chong) to be measured is less than 30s, the time of integration is in terms of 20s. Background on selected parallelepiped measurement surface is measured using the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter The cumulative percent time average sound pressure level L of noise_pAi(B)(50), continuously measured 3 times in each microphone position, take its arithmetic flat Mean value as ambient noise at the position sound-pressure-level measurement value and record.If at each position sound pressure level measured by 3 times it Difference is greater than 0.5dB, then re-measures and record；

(7) test dynamic pressure is adjusted to 0.30MPa ± 0.05MPa, is required according to rate of water make-up to be measured, by the water in test water tank Emptying；And 10s starts timing after intaking again, until inlet valve is closed naturally, acquires in this, as sound level meter sound signal The time of integration；If inlet valve sample moisturizing period (half punching or Quan Chong) to be measured is less than 30s, the time of integration is in terms of 20s.It answers Closet water on selected parallelepiped measurement surface is measured with the slow time character of weighting " S " of the A weighted equivalent sound level of sound level meter The cumulative percent time average sound pressure level L ' of case water intake valve noise_pAi(ST)(50), 3 are continuously measured in each microphone position It is secondary, its arithmetic mean of instantaneous value is taken as the sound-pressure-level measurement value for noise of intaking at the position and is recorded.If being surveyed for 3 times at each position The difference of the sound pressure level obtained is greater than 0.5dB, then re-measures；The dynamic pressure intake every time, rate of water make-up and moisturizing period are recorded simultaneously.
5. the detection method of intaking valve for toilet cistern water inlet noise according to claim 1, which is characterized in that the sound Power stage calculates, and carries out in the steps below:

(1) calculation formula selects: referring to relevant regulations in GB/T 3767-2016, the calculation formula of test parameter involved by this patent It is as follows:

If △ L_pA(50)> 15dB, then without carrying out background noise modification；If 6dB≤△ L_p(50)≤ 15dB, then according to formula (7) It is modified,

K_1A=-10lg (1-10^{-0.1△LpA(50)})………………………………………………………(7)

K_2A=l0lg (l+4S/A) ... ... ... ... ... ... ... ... ... ... ... ... ... (8)

Work as K_2AWhen≤4dB, the measurement done according to this patent method is effective；The wherein absorption of semi-anechoic room and reverberation chamber room Calculation formula is respectively as follows:

A=α S_ν……………………………………………………………………………(9)

A=0.16V/T_n…………………………………………………………………………(10)

L_WA _ref,atm(50)=L_WA(50)+C₁+C₂……………………………………………………(15)

In formula:

--- in the specific moisturizing period, the A of the water intake valve noise measured on parallelepiped measurement surface Weighted cumulative percent time average sound pressure level mean value, unit are decibel (dB)；

L′_pAi(ST)(50)--- in the specific moisturizing period, parallelepiped measurement i-th of surface microphone position at measure into The A weighted cumulative percent time average sound pressure level of water valve water inlet noise, unit are decibel (dB)；

N_M--- parallelepiped measures surface microphone position number；

--- in the specific moisturizing period, the A weighted of the ambient noise measured on parallelepiped measurement surface is accumulative Percentage time average sound pressure level mean value, unit are decibel (dB)；

L_pAi(B)(50)--- in the specific moisturizing period, the background measured at the microphone position of i-th of surface is measured in parallelepiped The A weighted cumulative percent time average sound pressure level of noise, unit are decibel (dB)；

K_1A--- background noise modification value；

K_2A--- test Environment Correction Value；

S --- parallelepiped measures the area on surface, and unit is square metre (m²)；

A --- in test cabinet at 1kHz frequency room equivalent absorption area, unit be square metre (m²)；

The A weighted average sound absorption coefficient of α --- test cabinet room surface, numberical range is referring to table in GB/T 3767-2016 A.1；

S_ν--- the gross area (wall, floor, ceiling) of test cabinet room boundaries, unit are square metre (m²)；

V --- test room volume, unit are cubic meter (m³)；

T_n--- the A weighted measured or frequency band reverberation time, unit are the second (s)；

--- in the specific moisturizing period, the inlet valve sample water inlet noise that surface method measures is measured through parallelepiped A weighted cumulative percent time average sound pressure level, unit are decibel (dB)；

L_WA(50)--- under the meteorological condition in testing time and place, each inlet valve sample is within the specific moisturizing period through flat The water inlet noise A weighted cumulative percent acoustic power level that row hexahedron measurement surface method measures, unit are decibel (dB)；

S₀=1m²；

C₁--- the function of air characteristics impedance under the meteorological condition in testing time and place；

C₂--- sound function under standard meteorological conditions will be converted to relative to the practical acoustical power under testing time and place meteorological condition The radiation impedance correction value of rate；

p_s--- the atmospheric pressure of testing time and place, unit are kPa (kPa)；

p_s,0--- standard atmospheric pressure, 101.325kPa；

The air themperature of θ --- testing time and place, unit are degree Celsius (DEG C)；

θ₀=314K；

θ₁=296K；

L_WA _ref,atm(50)--- under the standard meteorological conditions that atmospheric pressure is 101.325kPa, temperature is 23.0 DEG C, each water inlet The A weighted cumulative percent acoustic power level of valve sample water inlet noise, unit are decibel (dB)；

--- the average value of the A weighted cumulative percent acoustic power level of every group of inlet valve sample water inlet noise, unit are point Shellfish (dB)；

L_WA(50)1、L_WA(50)2、L_WA(50)3--- the A weighted cumulative percent acoustical power of every group of three inlet valve samples water inlet noise Grade, unit are decibel (dB)；

--- under the standard meteorological conditions that atmospheric pressure is 101.325kPa, temperature is 23.0 DEG C, every group of inlet valve The average value of the A weighted cumulative percent acoustic power level of sample water inlet noise, unit are decibel (dB)；

L_WA _ref,atm(50)1、L_WA _ref,atm(50)2、L_WA _ref,atm(50)3--- in atmospheric pressure 101.325kPa, 23.0 DEG C of temperature of mark Under quasi- meteorological condition, the A weighted cumulative percent acoustic power level of every group of inlet valve sample water inlet noise, unit is decibel (dB)；

(2) data revision of the convention requirement: the A weighted cumulative percent time of intaking valve for toilet cistern water inlet noise and ambient noise is average Sound pressure level L '_pAi(ST)(50)And L_pAi(B)(50)Measurement result retains one decimal place effective digital, mean valueWithAnd the A weighted cumulative percent acoustic power level L of water intake valve noise_WA(50)Calculated result round numbers；

(3) uncertainty of measurement: this patent method provides intaking valve for toilet cistern water inlet noise A on parallelepiped measurement surface The repeatability standard deviation σ of weighted cumulative percent time average sound pressure level measurement result_omcUpper limit value is not more than 1.5dB.With reference to Related content in standard GB/T 3767-2016 is used same within a complete moisturizing period by same position experimenter Platform sound level meter surveys same parallelepiped selected by the same part intaking valve for toilet cistern sample of the same installed position A weighted cumulative percent time average sound pressure level average value on scale faceOrCarry out 6 repetitions It measures (for each duplicate measurements, inlet valve sample must be reinstalled and adjust positioning), and background is carried out to measurement result and is made an uproar Sound amendment.Repeatability standard deviation σ_omcCalculation formula are as follows:

In formula:

--- intaking valve for toilet cistern water inlet noise jth time duplicate measurements and the parallelepiped after background noise modification Measure the average value of A weighted cumulative percent time average sound pressure level on surface；

--- the Arithmetical average sound pressure grade being calculated by all repeated measuring results.
6. the detection method of intaking valve for toilet cistern water inlet noise according to claim 1, which is characterized in that the knot Fruit evaluation, carries out in the steps below:

(1) according to national environmental protection specification and products standards requirement, following classification criterion is taken:

Very low for water inlet noise, environmental-protecting performance is excellent；

Very low for water inlet noise, environmental-protecting performance is good；

Lower for water inlet noise, environmental-protecting performance is preferable；

Higher to rinse noise, environmental-protecting performance is poor；

Very high to rinse noise, environmental-protecting performance is inferior,

(2) as some sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)3 samples water inlet noise A are organized greater than this Weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10% when, need to extract again one group of sample repeat it is real It tests；The two groups of inlet valve samples in front and back are calculated under set dynamic pressure using the slow time weighted of the A weighted equivalent sound level of sound level meter The water inlet noise A weighted cumulative percent acoustic power level L that characteristic " S " is measured through parallelepiped measurement surface method_WA(50)Arithmetic Average valueThe noise A weighted cumulative percent acoustic power level L if some sample is intake_WA(50)Greater than this two groups of 6 samples Water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous value10%, then abandon it；Take remaining inlet valve Sample water inlet noise A weighted cumulative percent acoustic power level L_WA(50)Arithmetic mean of instantaneous valueIt intakes as this group of tank for excrement pan Valve sample water inlet noise rating index.