CN205228630U - Noise detection compares device - Google Patents
Noise detection compares device Download PDFInfo
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- CN205228630U CN205228630U CN201521052119.XU CN201521052119U CN205228630U CN 205228630 U CN205228630 U CN 205228630U CN 201521052119 U CN201521052119 U CN 201521052119U CN 205228630 U CN205228630 U CN 205228630U
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Abstract
The utility model provides a noise detection compares device, its including the multi -functional signal generator, the power amplifier, the coupled cavity that are used for enlargeing the signal of telecommunication that are used for sending the signal of telecommunication, be used for electroacoustic transducer and the standard noise meter for the acoustical signal with electric signal transition, electroacoustic transducer and standard noise meter place in in the coupler, multi -functional signal generator with power amplifier communication connection, power amplifier with electroacoustic transducer communication connection in the coupled cavity, the standard noise meter with electroacoustic transducer communication connection. The utility model discloses a noise detection compares device can launch the simulation acoustical signal (mixture frequency) in the workplace, and then is comparing the performance of more comprehensively scientifically evaluateing the noise measurement instrument of each mechanism in the activity, fills in the occupational health field blank of comparing the device in the noise detection laboratory.
Description
Technical field
The utility model relates to walkaway field, particularly relates to a kind of workplace walkaway comparison device.
Background technology
Contrasting between laboralories is according to prespecified condition, the tissue same or similar test sample detected by two or more laboratory, enforcement and evaluation, thus determine the difference of laboratory capabilities, identification laboratory Problems existing and laboratory monitoring, be one of effective means of judgement and monitoring experiment room ability.The walkaway of workplace is one of project the most common during occupational health detects.Sound meter and noise-measuring instrument, it is instrument the most basic in noise measurement.Walkaway comparison adopts a kind of noise comparison device as signal microphone usually, then the psophometer noise measuring instrument participating in comparison is measured its signal, finally analyze according to the measurement result of statistical method to every stage noise measuring instrument, and then assess the performance of this noise measuring set.
When acoustic calibrator is on a kind of microphone when being coupled to regulation type and construction (as band or not with grill-protected cover), the device of one or more known sound pressure level can be produced in one or more assigned frequency.Common acoustic calibrator great majority can only launch single-frequency or single strength signal, as adopted the sound level calibrator of the pistonphone of frequency 250Hz sound pressure level 124dB or frequency 1000Hz sound pressure level 94dB, 114dB.There is a Multifunctional Acoustic Calibrator of production in recent B & K company both domestic and external etc., has 11 Frequency points.
The equipment that existing workplace noise ratio is right mostly is common acoustic calibrator, does not have special comparison device, can only launch the signal of single-frequency or single intensity.But the pectrum noise that workplace noise is generally made up of combination frequency, adopt existing acoustic calibrator can only assess the sound pressure sensitivity of the some frequencies of noise measuring set, and be certain Frequency point specific, as 1000Hz, the workplace noise signal of hybrid frequency can not be launched, the sound pressure sensitivity of this noise measuring set to hybrid frequency acoustical signal in workplace cannot be reflected comprehensively.Cause the reason of this situation mainly, noise ratio is before carried out activity is less, still rests on old consciousness to the understanding of the calibration of noise, and what require along with laboratory testing capability improves constantly, and this problem comes out gradually.
Therefore, be necessary to propose a kind of new technical scheme to solve the problem.
Utility model content
In order to overcome the defect of above-mentioned prior art, the utility model provides a kind of walkaway comparison device, it not only launches the acoustical signal of single-frequency and single intensity, available frequency coverage Di, Zhong, Gao Frequency noise, and the analog acoustic signal (hybrid frequency) can launched in workplace, and then in comparison activity, scientifically assess the performance of noise-measuring instrument of each mechanism more comprehensively, fill up the blank of walkaway contrasting between laboralories device in occupational health field.
The utility model provides a kind of walkaway comparison device, described walkaway comparison device comprise the multifunctional signal generator for sending electric signal, the power amplifier for amplification signal, coupler, for converting electrical signals to electroacoustics transducer and the standard sound meter of acoustical signal, described electroacoustics transducer is positioned in described coupling mechanism, described standard sound meter is connected in described coupler
Described multifunctional signal generator and described power amplifier communicate to connect, and the electroacoustics transducer in described power amplifier and described coupler communicates to connect, and described standard sound meter and described electroacoustics transducer communicate to connect.
Further, the electric signal that described multifunctional signal generator sends is the electric signal of single-frequency or hybrid frequency.
Further, described multifunctional signal generator is portable multi-function signal generator.
Further, the electric signal that described multifunctional signal generator sends comprises white noise, pink noise, sine wave, swept-frequency signal, sweeps width signal, tone burst and on-the-spot noise.
Further, described multifunctional signal generator adopts AMP audio format to send electric signal.
Further, described standard sound level counts 1 type sound meter or 2 type sound meters.
The beneficial effects of the utility model: compared with prior art, the utility model tool has the following advantages:
(1) the utility model can assess the performance of the noise-measuring instrument of each mechanism, check its accuracy providing walkaway data, reliability and validity, the technical capability of the walkaway of Objective corroboration and this mechanism of evaluation, ensure the quality of walkaway result, improve its degree of confidence, the continuous capability of checking and monitoring experiment room.
(2) the utility model available frequency coverage Di, Zhong, Gao Frequency noise, and the analog acoustic signal (hybrid frequency) can launched in workplace, and then in comparison activity, scientifically assess the performance of noise-measuring instrument of each mechanism more comprehensively, fill up the blank of walkaway contrasting between laboralories device in occupational health field.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:
Fig. 1 is the system chart of the utility model walkaway comparison device.
1-multifunctional signal generator, 2-power amplifier, 3-coupler, 4-electroacoustics transducer, 5-standard sound meter.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Alleged herein " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the utility model.Different local in this manual " in one embodiment " occurred not all refers to same embodiment, neither be independent or optionally mutually exclusive with other embodiments embodiment.
Refer to Fig. 1, Fig. 1 is the system chart of the utility model walkaway comparison device.As shown in Figure 1, walkaway comparison device, it comprises electroacoustics transducer 4, multifunctional signal generator 1, coupler 3, standard sound meter 5 and power amplifier 2.Described electroacoustics transducer 4 is arranged in described coupling mechanism 3, and described standard sound meter 5 is connected in described coupler 3.
Described multifunctional signal generator (1) and described power amplifier (2) communicate to connect, described power amplifier (2) communicates to connect with the electroacoustics transducer (4) in described coupler, and described standard sound meter (5) and described electroacoustics transducer communicate to connect.Described multifunctional signal generator 1 sends electric signal and delivers to power amplifier 2, described power amplifier 2 receives the electric signal from described multifunctional signal generator 1 and the described electroacoustics transducer 4 be input to after the amplitude of described electric signal being amplified in coupler 3, described electroacoustics transducer 4 transfers electric signal to acoustical signal, and the standard sound meter 5 in described coupler 3 receives the sound pressure level in coupler 3 described in acoustical signal measurement.The sound source being acoustic energy electric energy conversion calls electroacoustics transducer, and sound source can be non-directive sound source, and non-directive sound source is in distance Sound Source Center equidistant, and sound pressure level is equal.
The electric signal that described multifunctional signal generator 1 sends is the electric signal of single-frequency or hybrid frequency.Described multifunctional signal generator 1 is portable multi-function signal generator.Portable multi-function signal generator adopts ARM as control core, adopt digital synthesis technology produce needed for signal, as: white noise, pink noise, sine wave, swept-frequency signal, sweep width signal, tone burst, on-the-spot noise etc.Have good stability, the feature that function is strong, the signal of generation designs according to the required main signal of sound meter calibrating.
Sound meter is generally by condenser microphone, prime amplifier, attenuator, amplifier, spectrum overlapping network and effective value indicating gauge is first-class forms.The principle of work of sound meter is: convert tones into electric signal by microphone, then by prime amplifier transforming impedance, microphone is mated with attenuator.Output signal is added to weighting network by amplifier, spectrum overlapping (or external filters) is carried out to signal, and then through attenuator and amplifier, signal is amplified to certain amplitude, deliver to rms detector (or outward by level recorder), indicating meter provides the numerical value of noise sound level.Sound meter is divided into 1 grade and 2 grades by class of accuracy, and standard sound meter 5 of the present utility model is 1 type sound meter or 2 type sound meters.
The utility model also provides a kind of walkaway comparison method, the method adopts walkaway compare device as signal microphone, tested sound meter is measured the signal that described walkaway compare device sends, measure tested sound level, then by the value of tested sound level and standard sound level being compared, thus the performance of tested sound meter is evaluated.This noise comparison method comprises the control methods of control methods to single-frequency and hybrid frequency.The method that noise ratio of the present utility model is right passes through the performance of the tested sound meter in each environment of assessment, tested sound meter is checked to provide the accuracy of walkaway data, reliability and validity, the technical capability of the walkaway of Objective corroboration and this mechanism of evaluation, ensure the quality of walkaway result, improve its degree of confidence, as the continuous capability in laboratory under checking and monitoring environment.Wherein, the performance of the tested sound meter of assessment comprises the sound level of a frequency or hybrid frequency acoustical signal.
Described walkaway comparison method specifically comprises the steps:
S1, multifunctional signal generator 1 send the electric signal of single-frequency or hybrid frequency to power amplifier 2;
The amplitude of electric signal is amplified by S2, power amplifier 2, and the electric signal after amplifying is inputed to electroacoustics transducer 4;
S3, electroacoustics transducer 4 transfer the electric signal after amplification to acoustical signal;
S4, described standard sound meter receive the acoustical signal that electroacoustics transducer sends, and measure the sound pressure level in described coupler, obtain standard sound level by standard sound meter;
S5, tested sound meter is put into described coupler, measured the sound pressure level value in coupler by tested sound meter, obtain tested sound level;
S6, tested sound level and standard sound level to be compared, obtain error amount, and then assess the performance of this tested sound meter.
It should be noted that, walkaway comparison device of the present utility model is used in the Performance Evaluation of the noise level monitor under each environment.
The utility model tool has the following advantages:
(1) the utility model can assess the performance of the noise-measuring instrument of each mechanism, check its accuracy providing walkaway data, reliability and validity, the technical capability of the walkaway of Objective corroboration and this mechanism of evaluation, ensure the quality of walkaway result, improve its degree of confidence, the continuous capability of checking and monitoring experiment room.
(2) the utility model available frequency coverage Di, Zhong, Gao Frequency noise, and the analog acoustic signal (hybrid frequency) can launched in workplace, and then in comparison activity, scientifically assess the performance of noise-measuring instrument of each mechanism more comprehensively, fill up the blank of walkaway contrasting between laboralories device in occupational health field.
Above-mentioned explanation fully discloses embodiment of the present utility model.It is pointed out that the scope be familiar with person skilled in art and any change that embodiment of the present utility model is done all do not departed to claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.
Claims (6)
1. a walkaway comparison device, it is characterized in that: described walkaway comparison device comprise the multifunctional signal generator (1) for sending electric signal, the power amplifier (2) for amplification signal, coupler (3), for converting electrical signals to electroacoustics transducer (4) and the standard sound meter (5) of acoustical signal, described electroacoustics transducer (4) is positioned in described coupling mechanism (3), described standard sound meter (5) is connected in described coupler (3)
Described multifunctional signal generator (1) and described power amplifier (2) communicate to connect, described power amplifier (2) communicates to connect with the electroacoustics transducer (4) in described coupler, and described standard sound meter (5) and described electroacoustics transducer communicate to connect.
2. walkaway comparison device according to claim 1, is characterized in that: the electric signal that described multifunctional signal generator (1) sends is the electric signal of single-frequency or hybrid frequency.
3. walkaway comparison device according to claim 1 and 2, is characterized in that: described multifunctional signal generator (1) is portable multi-function signal generator.
4. walkaway comparison device according to claim 1 and 2, is characterized in that: the electric signal that described multifunctional signal generator (1) sends comprises white noise, pink noise, sine wave, swept-frequency signal, sweeps width signal, tone burst and on-the-spot noise.
5. walkaway comparison device according to claim 4, is characterized in that: described multifunctional signal generator (1) adopts AMP audio format to send electric signal.
6. walkaway comparison device according to claim 1 and 2, is characterized in that: described standard sound meter (5) is 1 type sound meter or 2 type sound meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521052119.XU CN205228630U (en) | 2015-12-16 | 2015-12-16 | Noise detection compares device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521052119.XU CN205228630U (en) | 2015-12-16 | 2015-12-16 | Noise detection compares device |
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| CN205228630U true CN205228630U (en) | 2016-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403307A (en) * | 2015-12-16 | 2016-03-16 | 广东省职业病防治院 | Noise detection comparison apparatus and method |
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
-
2015
- 2015-12-16 CN CN201521052119.XU patent/CN205228630U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403307A (en) * | 2015-12-16 | 2016-03-16 | 广东省职业病防治院 | Noise detection comparison apparatus and method |
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
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