Powered by Google-Search & Google-Books Chinese Standards Shop Database: 169759 (Dec 1, 2019)
 HOME   Quotation   Tax   Examples Standard-List   Contact-Us   View-Cart
  

HJ 907-2017

Chinese Standard: 'HJ 907-2017'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
HJ 907-2017English219 Add to Cart Days<=3 Technical requirements for automatic monitoring system of environmental noise Valid HJ 907-2017
HJ 907-2017Chinese18 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]  

 HJ 907-2017 -- Click to view similar PDF/Books...  
Detail Information of HJ 907-2017; HJ907-2017
Description (Translated English): Technical requirements for automatic monitoring system of environmental noise
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: Z32
Classification of International Standard: 13.140
Word Count Estimation: 11,153
Date of Issue: 2017-12-14
Date of Implementation: 2018-03-01
Quoted Standard: GB 4208; GB/T 3241; GB/T 3785.1; GB/T 15173; HJ 660
Drafting Organization: China Environmental Monitoring Station
Administrative Organization: Ministry of Environmental Protection
Regulation (derived from): Ministry of Environmental Protection Bulletin 2017 No. 71
Summary: This standard specifies the technical requirements, performance indicators, and detection methods for an environmental noise automatic monitoring system. This standard applies to the application of environmental noise monitoring system selection and testing.


HJ 907-2017
(Environmental noise monitoring system technical requirements)
People's Republic of China national environmental protection standards
Environmental noise monitoring system technical requirements
Technical requirements for automatic monitoring system of
environmental noise
2017-12-14 Published
2018-03-01 implementation
Ministry of Environmental Protection released
Directory
Foreword i
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 technical requirements 2
Appendix A (Normative) noise monitoring sub-station performance indicators and testing methods applicable.7
i Foreword
In order to implement the Law of the People's Republic of China on Environmental Protection and the Law of the People's Republic of China on Prevention and Control of Environmental Noise Pollution,
Standardize the performance of automatic environmental noise monitoring system to improve acoustic environment monitoring capabilities, the development of this standard.
This standard specifies the technical requirements for environmental noise automatic monitoring system, performance indicators and testing methods.
Appendix A of this standard is normative appendix.
This standard is released for the first time.
This standard by the Environmental Protection Department of Environmental Monitoring Division and Science and Technology Standards Division to develop.
This standard was drafted. China Environmental Monitoring Station, Beijing Environmental Protection Monitoring Center, Zhuhai Gaoling Information Technology
Limited company.
This standard MEP approved on December 14,.2017.
This standard since March 1,.2018 into effect.
This standard is interpreted by the MEP.
1 environmental noise monitoring system technical requirements
1 scope of application
This standard specifies the technical requirements for environmental noise automatic monitoring system, performance indicators and testing methods.
This standard applies to the application of automatic environmental noise monitoring system selection and testing.
2 Normative references
This standard references the following documents or the terms of them. For dated references, the effective version is valid
Used for this standard.
GB 4208 enclosure protection (IP code)
GB/T 3241 electro-acoustic octave and fractional octave filters
GB/T 3785.1 Electroacoustic sound level meter Part 1 specification
GB/T 15173 electroacoustic sound calibrator
HJ 660 Environmental Monitoring Information Transmission Technical Specification
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Automatic monitoring system of environmental noise
Based on noise monitoring equipment, data communications technology and computer application software, automatic noise monitoring and real-time ring
The system of statistical analysis of environmental noise data generally consists of one or more noise monitoring stations and a noise monitoring system.
3.2
Noise monitoring sub-station noise monitoring sub station
Noise monitoring sub-station is an outdoor sampling of environmental noise automatic monitoring system, generally divided into two types of fixed and mobile
Types of. Noise monitoring stations include all-weather outdoor microphone, noise acquisition and analysis unit, communication unit, power control unit
And chassis and other supporting security unit.
Weatherproof outdoor microphone. refers to the wind, rain, dust, interference designed to meet the long-term outdoor continuous use
microphone.
2 noise acquisition and analysis unit. a noise signal acquisition and data analysis capabilities, and can save a certain amount of data.
Communication unit. Data communication between noise monitoring substation and noise monitoring system.
Power control unit. to provide power supply to prevent the impact of external power supply jitter on the measurement accuracy, protection noise monitor
Stations are protected from external surges.
Chassis. All-weather protection box for placing noise acquisition and analysis unit, communication unit, power control unit, etc.
Wind, rain, anti-theft effect.
3.3
Noise monitoring system noise monitoring system
Environmental noise automatic monitoring system of data statistics, analysis part of the noise monitoring station to achieve the operational status monitoring,
Data collection, storage, audit, query, statistics and report generation and other functions.
3.4
Noise monitoring sub-station local noise ground noise induced by noise monitoring sub station
Noise refers to the noise emitted by the substation during normal operation.
3.5
Noise automatic monitoring of raw data of noise automatic monitoring
The data measured by the minimum measurement period set by the automatic noise monitoring system is the basis for the statistics and analysis of other periods
according to.
3.6
Data acquisition rate
During the monitoring period, due to the instrument software and hardware failure and other reasons, the actual collection of noise automatic monitoring of the original data
The percentage (in DAR) of the number of and in principle the number of times the noise should be automatically monitored for raw data.
100%
DAR  (1)
Where. n - the actual acquisition of noise during the monitoring period automatically monitor the number of raw data;
N- In the monitoring period should theoretically collect noise automatically monitor the number of raw data.
4 technical requirements
4.1 noise monitoring sub-station
4.1.1 Appearance and structure
34.1.1.1 Part of noise monitoring substation measuring instruments shall be manufactured CMC marking of measuring instruments (imported products should be made in our country quality
Technical supervision department measuring instruments type approval certificate) and product nameplate, the nameplate should be marked with the instrument name, model, production
Unit, serial number, date of manufacture, level of accuracy and manufacturer.
4.1.1.2 The parts should be connected reliably without any obvious defects on the surface. The operation keys are flexible to use and have accurate positioning.
4.1.1.3 Each display part of the scale, the figures clear, solid color, there should be no reading defects.
4.1.1.4 Chassis dust and waterproof performance should be consistent with GB 4208 IP 55 requirements. Chassis casing should be corrosion-resistant.
4.1.1.5 Installation should be firm, according to the user's own geographical location, in general areas should be able to withstand 10 winds in the coastal areas
Should be able to withstand 12 winds.
4.1.2 Environmental conditions
4.1.2.1 Noise monitoring sub-station should work under the following environmental conditions.
a) Ambient temperature. -30 ~ 50 ℃. If the noise monitoring substation is arranged in other temperature environment, measures should be taken to ensure the instrument
The device can work normally.
b) Relative humidity. 0 ~ 100% (no condensation).
c) Environmental pressure. 65 ~ 108 kPa.
4.1.3 all-weather outdoor microphone
4.1.3.1 The sound pressure sensitivity of the microphone at 250 Hz shall be greater than 30 mV/Pa.
4.1.3.2 Microphone Directivity Response. 0 ° and 90 ° incidence should be supported.
4.1.3.3 Microphones should support long-term outdoor use, and have windproof, rainproof, dustproof, anti-interference and other functions.
4.1.3.4 The microphone hood shall not be damaged at a wind speed of 30 m/s.
4.1.3.5 Microphone holder structure should facilitate the microphone installation, removal and sound calibration operation.
4.1.4 Noise acquisition and analysis unit
4.1.4.1 Shall comply with the requirements of GB/T 3785.1 for a sound level meter.
4.1.4.2 The lower limit of measurement is not higher than 30 dB and the upper limit of measurement is not lower than 130 dB.
4.1.4.3 There should be A, C, Z frequency weighting method.
4.1.4.4 There should be F, S time weighting method. Sampling interval is no more than 1 s.
4.1.4.5 should be scalable octave or one-third octave and other real-time spectrum analysis functions should be consistent with GB 3241 on the 1st filter
The requirements of the instrument and the spectral sampling interval can be set remotely.
4.1.4.6 The measurement parameters shall include the instantaneous sound level LP, the equivalent sound level Leq, the cumulative sound level LN (N = 5, 10, 50, 90,
495), the maximum sound level Lmax, the minimum sound level Lmin, standard deviation SD and so on.
4.1.4.7 Should support the setting of statistical analysis time remotely, generate Leq, LN, Lmax, Lmin, SD and mining in the custom time period
Set rate and other statistics should be able to generate hourly statistics and day statistics (Ld, Ln, Ldn).
4.1.4.8 There should be a trigger recording function and remote playback function for the sound exceeding a certain limit, the trigger limit and the recording time
Can be set.
4.1.4.9 should have a remote self-test function and can be arbitrarily set self-test frequency, indication error is greater than 0.5 dB automatically prompts.
4.1.4.10 should have automatic timing function.
4.1.4.11 There should be automatic restart function after the child station crashes.
4.1.4.12 Other related parameter acquisition functions such as video, wind speed, wind direction, temperature, relative humidity, barometric pressure,
Rainfall, latitude and longitude, road traffic flow and so on.
4.1.4.13 Noise monitoring Sub-station raw data and recording data storage time should be greater than 60 d, and support through the common communication interface
Download data.
4.1.4.14 should not affect the data acquisition and storage in the event of a temporary communication failure, postponed automatically after the fault recovery data.
4.1.5 Communication Unit
4.1.5.1 Should be able to transmit noise in real time Automatic monitoring of raw data and recording data.
4.1.5.2 Data transmission mode, transmission flow, transmission format, etc. shall meet the relevant provisions of HJ 660.
4.1.5.3 Two kinds of communication functions of wireless transmission and wired transmission should be supported.
4.1.6 Power Supply and Safety
4.1.6.1 Uninterruptible power supply should have charge and discharge protection, the capacity should ensure that the terminal work more than 24 h.
4.1.6.2 Power supply part of the insulation resistance should be greater than 20 MΩ.
4.1.6.3 Each independent component should be grounded.
4.1.6.4 should have lightning protection design.
4.1.6.5 There should be leakage protection device and burglar alarm device.
4.1.6.6 high temperature, high pressure and hazardous parts should have a warning sign.
4.2 noise monitoring system
4.2.1 The main function of noise monitoring system
Noise monitoring system should have noise monitoring substation operational status monitoring, data collection, data storage, audit, query,
Statistics and report generation and other functions.
54.2.2 Noise Monitoring Substation operational status monitoring and data collection
4.2.2.1 Can monitor the working status of each device in the system, support the power monitoring of substation power interruption, communication interruption, equipment failure, etc.
Abnormal alarm, and generate fault statistics.
4.2.2.2 Support for remote monitoring of noise monitoring sub-station parameters.
4.2.2.3 Every day to generate noise monitoring substation status records and self-test report.
4.2.2.4 Support regular collection of monitoring data of each noise monitoring substation regularly.
4.2.2.5 Support Manual Collection of Delay Data After Device Recovery.
4.2.3 Data Storage and Audit
4.2.3.1 The original monitoring data should be automatically backed up automatically at least once a quarter and incremental backups should be performed once a week.
4.2.3.2 The original monitoring data should be kept for at least 5 years and be automatically backed up. When deleting, the data should be repeatedly confirmed and recorded in detail.
4.2.3.3 Can store and play live recordings recorded by event trigger.
4.2.3.4 For each period of noise monitoring data should be able to set outliers to determine the conditions (such as. do not meet the data collection rate requirements of the data,
Does not meet the relevant norms meteorological conditions of data, substation monitoring equipment failure random values, etc.), support for abnormal data automatically
Markers and tips to support manual review of data.
4.2.3.5 Do not modify or delete the noise in the database to automatically monitor the original data.
4.2.4 data statistics query and report generation
4.2.4.1 Support Automatically monitor raw data statistics based on noise, calculate various periods required by users, and different statistical periods
Evaluation data (including noise collection data and meteorological parameters such as Leq, Ld, Ln, Ldn, LN, Lmax, Lmin, SD,
Road traffic information and other scalable data).
4.2.4.2 Support the classification of noise data, abnormal data and maintenance records.
4.2.4.3 Support the real-time display of the monitoring data of each noise monitoring substation on the map in the form of charts, tables, etc.
4.2.4.4 The data statistics report shall have the function of manual sampling data recalculation.
4.2.4.5 Support user-defined statistical period and report report template, data report report should support tables and graphics.
4.2.4.6 Should support the export of Excel, Word, PDF and other common file formats.
4.2.5 software interface
Should support the noise monitoring system data interface open, enabling data exchange and sharing.
4.3 Instrument Operation Manual requirements
The operating instructions of the instrument should at least include the following. instrument principle, instrument structure diagram, field installation method, instrument
6 operating methods, parts identification and precautions, dangerous goods hazard warning signs, common troubleshooting and routine maintenance instructions.
4.4 noise monitoring substation performance indicators and applicability testing methods
Noise monitoring sub-station performance indicators and applicability detection methods in Appendix A.
7 Appendix A.
(Normative)
Noise Monitoring Substation Performance Index and Applicability Test Method
This appendix specifies the noise monitoring sub-station performance indicators and testing methods.
A.1 Performance Indicators
A.1.1 data collection rate
Continuous outdoor operation at least 30 d, data collection rate DAR should be greater than 95%.
A.1.2 Noise Monitoring sub-station local noise
Noise monitoring sub-station normal operation, in the full anechoic chamber or semi-anechoic chamber at 0.5 m from the edge of the chassis measured equivalent to A
Sound level should be less than 30 dB.
A.1.3 Temperature stability
Within the relative humidity range specified in A.1.4, when the noise monitoring substation operates in the temperature range of -30 to 50 ℃,
Any sound level displayed at a temperature that deviates from the sound level difference at a reference temperature of 23 ° C plus a measurement uncertainty of 0.3 dB
Should not exceed ± 0.8 dB.
A.1.4 Relative Humidity Stability
Within the temperature range specified in A.1.3, when the noise monitoring substation operates in the relative humidity range of 0 to 100%,
The sound level displayed at any relative humidity deviates from the sound level difference displayed by the reference relative humidity by 50%, plus a 0.3 dB measurement spread
After the exhibition uncertainty should not exceed ± 0.8 dB.
A.1.5 Microphone wind shield windproof ability
At a wind speed of 10 m/s, the wind shield of the microphone hood should be damped by at least 30 dB.
A.2 Applicability test method
A.2.1 test conditions
A.2.1.1 main ancillary equipment
A.2.1.1.1 standard sound source generating device
The level of accuracy of the standard sound source generating device shall comply with the LS level or level 1 specified in GB/T 15173.
A.2.1.1.2 barometer
8 In the detection of environmental conditions, barometer maximum tolerance should be better than ± 0.2 kPa.
A.2.1.1.3 Thermometer
In the detection of environmental conditions, the maximum thermometer tolerance should be better than ± 0.2 ℃.
A.2.1.1.4 hygrometer
In the detection of environmental conditions, the maximum allowable hygrometer should be better than ± 4%.
A.2.1.2 test environmental conditions
A.2.1.2.1 Temperature. 20 ~ 26 ℃.
A.2.1.2.2 Relative humidity. 30 ~ 90%.
A.2.1.2.3 Air pressure. 97 ~ 103 kPa. When the air pressure at the testing laboratory can not meet the above requirements, repair shall be provided
Positive method.
A.2.1.3 Reference environmental conditions
A.2.1.3.1 Temperature. 23 ° C.
A.2.1.3.2 Relative humidity. 50%.
A.2.1.3.3 Air pressure. 101.325 kPa.
A.2.2 data collection rate
A.2.2.1 During the testing shall not be any form of instrument maintenance.
A.2.2.2 Automatic noise monitoring system Continuous work at least 30 d, calculate the data acquisition rate, to determine whether to meet the requirements.
A.2.2.3 If the initial test failed, allowing 1 instrument maintenance.
A.2.2.4 The first test unqualified instrument, re-testing, continuous working time of not less than 50 d. Calculate data collection rate,
If you still can not meet the requirements, then judged as unqualified.
A.2.3 Noise Monitoring sub-station local noise
A.2.3.1 Place the noise monitoring substation in a full or semi-anechoic chamber at a distance of 0.5 m from the edge of the noise monitoring substation chassis
At the front, rear, left, right and above the total set of five test points in the noise monitoring station under normal working conditions for measurement,
Each time you read the equivalent sound level value of 1 min, take the maximum value of 5 test points for evaluation.
A.2.3.2 Repeat the test 3 times in accordance with A.2.3.1.
A.2.3.3 take 3 times the maximum test results to determine.
A.2.4 temperature stability
A.2.4.1 The noise monitoring stations and the provisions of the standard sound source generating device placed in the environmental chamber. Environmental chamber of the phase
9 pairs of humidity should be reference relative humidity, atmospheric pressure should be reference atmospheric pressure. Environment Chamber temperature changes at every moment to deal with
Relative humidity and atmospheric pressure monitoring, in order to ensure that the maintenance of the specified tolerance, the actual relative humidity should be within ± 9% of the specified relative humidity
Within the static pressure changes the absolute difference should not exceed 6.2 kPa.
A.2.4.2 No instrument maintenance shall be performed during the test.
A.2.4.3 When the test conditions are determined, the ambient temperature inside the chamber should be avoided rapidly changing. When the environment inside the chamber temperature
Degree began to change, care should be taken to avoid condensation.
A.2.4.4 noise monitoring stations and standard sound source generator at a reference temperature environment conditions for at least 12h environmental adaptation.
During environmental adaptability, the microphones on the standard sound generator and the noise monitoring substation should not be coupled and the power should be turned off.
After the environmental suitability period is completed, the microphones on the standard sound source generator and noise monitoring substations should be coupled and powered on
source. Read the sound level recorded by the noise monitoring system.
A.2.4.5 reference temperature After the end of the test under environmental conditions, at -30 ℃ (lowest temperature), 0 ℃, 30 ℃, 50 ℃
(Maximum temperature) and other four temperature environment conditions for testing. Adapt at least 7 hours after each temperature to a standard sound source
The microphone on the generator and noise monitoring substation is coupled and the power is turned on. Respectively, read the noise monitoring system records the sound level.
A.2.4.6 Calculate the sound pressure level generated by the standard sound source generator between the test environment and the reference ambient conditions
All differences, individually evaluated.
A.2.5 Relative Humidity Stability
A.2.5.1 Place the noise monitoring station and the specified standard sound source generator in the environmental chamber. Environmental chamber temperature
Should be a reference to relative humidity, atmospheric pressure should be reference atmospheric pressure. Environmental temperature and temperature changes in each moment to deal with the temperature and
Atmospheric pressure monitoring, in order to ensure that the provisions of the tolerance to maintain within the actual temperature should be within ± 1.3 ℃ of the specified temperature, static pressure changes
The absolute difference should not exceed 6.2 kPa.
A.2.5.2 No instrument maintenance shall be carried out during the test.
A.2.5.3 noise monitoring substations and standard sound source generator at a relative humidity environment reference conditions for at least 12 h environment
adapt. During environmental adaptability, the microphones on the standard sound generator and the noise monitoring substation should not be coupled and closed
power supply. After the environmental suitability period is completed, the microphones on the standard sound source generator and the noise monitoring substation should be coupled
Turn on the power. Read the sound level recorded by the noise monitoring system.
A.2.5.4 Reference relative humidity After the end of the test under environmental conditions, the test is performed at 0% (minimum relative humidity), 70%, 100%
(Maximum relative humidity) and other three relative humidity environment conditions for testing. Adapt to each relative humidity for at least 7 h
Then couple the standard sound generator with the microphone on the noise monitoring station and turn on the power. Respectively read the noise monitoring system
Recorded sound level.
A.2.5.5 Calculate the difference between the standard sound source generating device and the sound pressure level generated under reference environmental conditions
All differences, individually evaluated.
A.2.6 Microphone wind shield Windproof ability
A.2.6.1 Place the noise monitoring sub-station in the wind tunnel and set the wind speed to 10 m/s, and start the test when the wind speed is stable.
A.2.6.2 When the microphone is not fitted with a hood, read the equivalent sound level for 1 min. Microphone to install the hood, read 1 min
Equivalent sound level value. Calculate the sound level difference when the hood is installed and the hood is installed.
A.2.6.3 Repeat the test 3 times in accordance with A.2.6.2.
A.2.6.4 take 3 times the minimum test results to determine.
Related standard:   HJ 906-2017  HJ 908-2017
   
 
Privacy   ···   Product Quality   ···   About Us   ···   Refund Policy   ···   Fair Trading   ···   Quick Response
Field Test Asia Limited | Taxed in Singapore: 201302277C | Copyright 2012-2019