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Technical specifications for automatic monitoring of acoustic environment quality in function area
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HJ 906-2017
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| Standard ID | HJ 906-2017 (HJ906-2017) | | Description (Translated English) | Technical specifications for automatic monitoring of acoustic environment quality in function area | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z32 | | Classification of International Standard | 13.140 | | Word Count Estimation | 11,138 | | Date of Issue | 2017-12-14 | | Date of Implementation | 2018-03-01 | | Quoted Standard | GB 3096; HJ 640; HJ 907 | | Regulation (derived from) | Ministry of Environmental Protection Bulletin 2017 No. 71 | | Summary | This standard specifies the technical requirements for automatic monitoring of sound environment quality in functional areas, major monitoring items, data validity, monitoring data statistics, quality assurance and quality control. This standard applies to the automatic monitoring of acoustic environment quality in functional areas. |
HJ 906-2017
(Functional area acoustic environment quality automatic monitoring technical specifications)
People's Republic of China national environmental protection standards
Functional area acoustic environment quality automatic monitoring technical specifications
Technical specifications for automatic monitoring of acoustic environment
quality in function area
2017-12-14 Published
2018-03-01 implementation
Release MEP
i directory
Foreword .ii
1 scope of application .1
2 Normative references .1
3 Terms and definitions .1
4 monitoring methods .2
5 main monitoring project 2
6 Data validity .3
7 Monitoring Statistics 3
8 Quality Assurance and Quality Control 3
9 other .4
Appendix A (informative) functional area acoustic environment quality automatic monitoring points to determine the procedure 5
Appendix B (informative) functional area acoustic environment quality analysis method .6
Appendix C (informative) automatic noise monitoring system inspection and maintenance requirements .7
Foreword
In order to carry out "Law of the People's Republic of China on Environmental Protection" and "Law of the People's Republic of China on Prevention and Control of Environmental Noise Pollution", norms
Functional area acoustic environment quality automatic monitoring and evaluation, the development of this standard.
This standard specifies the functional area acoustic environment quality monitoring methods of automatic monitoring, the main monitoring project, data validation, monitoring
Test data statistics, quality assurance and quality control and other technical requirements.
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, Tianjin Environmental Monitoring Center, Chongqing Environmental Monitoring Center, Wu
Han City Environmental Monitoring Center and Suzhou City Environmental Monitoring Center Station.
This standard MEP approved on December 14,.2017.
This standard since March 1,.2018 into effect.
This standard is interpreted by the MEP.
1 Functional area acoustic environment quality automatic monitoring technical specifications
1 scope of application
This standard specifies the functional area acoustic environment quality monitoring methods of automatic monitoring, the main monitoring project, data validation, monitoring data
Statistics, quality assurance and quality control and other technical requirements.
This standard applies to functional area acoustic environment quality automatic monitoring.
2 Normative references
This standard references the following documents or the terms of them. For undated references, the latest edition is applicable to this standard
quasi.
GB 3096 acoustic environment quality standards
HJ 640 Environmental Noise Monitoring Technical Specification Urban Acoustic Environment General Monitoring
HJ 907 automatic environmental noise monitoring system technical requirements
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Valid data rate
In the measurement period, due to equipment, power, communications failures and other reasons, the actual number of valid data collected and the number of theoretical collection
According to the percentage of the number. The effective acquisition rate of the measurement period is calculated by equation (1)
100%
VDR
(1)
Where. VDR - effective collection of measurement time period;
n - the actual number of valid data collected during the measurement period;
N - the number of data that should be collected theoretically during the measurement period.
3.2
Equivalent sound level A continuous sound pressure level
Equivalent continuous A sound level referred to, in the provisions of the measurement time T A sound level average energy, with LAeq, T (abbreviated
Leq) in dB (A).
Considering the effective acquisition rate, the equivalent sound level is calculated according to formula (2).
, 0.1 (10)
10lg
eq iL
eq
VDR
VDR
(2)
2 Where. Leq, i - the equivalent sound level of the i period;
VDRi - the effective acquisition rate for period i.
3.3
Weather monitoring unit weather monitoring unit
Meteorological monitoring unit is an optional part of various noise monitoring terminals for real-time measurement of wind speed, wind direction, precipitation, temperature, humidity
Degree, pressure and other weather parameters.
4 monitoring methods
4.1 Automatic noise monitoring equipment used shall comply with the relevant requirements of HJ 907.
4.2 automatic monitoring of functional areas using GB 3096 Appendix B of the fixed-point monitoring method, the point settings should be consistent with HJ 640 in the relevant technology
Claim.
4.3 Point Selection First in accordance with the GB 3096 Appendix B census monitoring method, all kinds of functionally rough out the equivalent sound level and the average function area
There is no significant difference between the effective sound level, which can reflect the number of measuring points of the acoustic environmental quality characteristics of such functional areas, and then determine the function according to the following principles
District acoustic environment quality automatic monitoring point.
a) To meet the automatic monitoring equipment installation, normal operation, routine management and quality control requirements.
b) The monitoring points are easy to maintain and can guarantee safe, reliable and long-term stable operation.
c) Avoid any fixed sources of noise near the reflecting surface and nearby sources and avoid the effects of trees (windy leaves).
d) Monitoring points should be divided into administrative divisions.
e) Zone 4 Acoustic Environment Select the area for noise-sensitive buildings.
f) Automatic monitoring system noise on the microphone should be less than 10 dB (A) above the environmental noise, noise reduction measures should be taken
Reduce the impact of the work of automatic monitoring system noise.
g) Monitoring points should be free from strong electromagnetic interference, should be avoided by tall buildings, noise barriers and other obstacles to the spread of noise should be avoided installation
In the tuyere.
4.4 Monitoring point above ground level 1.2m above.
4.5 If the original functional area monitoring point meets the above requirements, install the automatic noise monitoring instrument directly at that point.
4.6 Functional area Acoustic environment quality automatic monitoring points to determine the program see Appendix A.
5 main monitoring project
5.1 Equivalent sound level for each hour Leq, h, cumulative percentile levels L10, L50, L90, maximum Lmax, minimum Lmin and standard deviation SD.
35.2 Daytime equivalent sound level Ld, nighttime equivalent sound level Ln and nighttime maximum sound level Lmax.
5.3 hours effective collection rate and day, night effective collection rate.
5.4 Optional meteorological monitoring unit records the monitoring time period of meteorological parameters (such as. wind speed, wind direction, temperature, humidity, pressure, etc.)
And the weather conditions (such as. rain and snow, lightning, etc.). And the average wind speed and minute precipitation statistics, the average hourly wind speed and hourly precipitation
the amount.
6 data validity
6.1 In all nature, all kinds of voices that may appear in human activities should not be treated as outliers.
6.2 due to equipment failure, power outages and other reasons caused some of the missing data, the hour equivalent sound level Leq, h monitoring time is less than 45 min (can be spaced)
The data is invalid; the daytime equivalent sound level Ld monitoring time is less than 13 h (can be spaced) the data is invalid; the night is equivalent to the night
Sound level Ln monitoring time is less than 7 h (can be spaced) the data is invalid.
7 monitoring data statistics
7.1 Calculate the daily daytime and nighttime equivalent sound level at each measuring point, and count the daytime and nighttime compliance rates according to the monitoring points at GB 3096 respectively.
7.2 The remaining monitoring items can be used for the relevant analysis. Analysis method see Appendix B.
8 Quality Assurance and Quality Control
8.1 Daily self-test should be done on a daily basis. If the deviation is more than 0.5 dB, the on-site sound calibration should be conducted to find out the reason in time. Self-test situation should be
Daily record.
8.2 Acoustic calibration of automatic monitoring equipment shall be carried out in accordance with the following requirements.
a) Set the sound calibrator on the test microphone, turn on the sound calibrator 3s, and read the value of the acoustic measuring instrument. Instrument shows the value and sound
Calibrator sound pressure level deviation should not exceed 0.5 dB, otherwise the monitoring data should be added notes and maintenance equipment, and should increase the site as appropriate
Sound calibration frequency.
b) Automatic monitoring systems should perform live sound calibration regularly (at least once a month).
c) Acoustic calibration should be performed after typhoon, blizzard, hail and other inclement weather.
d) If the monitoring value appears sharply rising, decreasing or continuously changing, it shall be checked systematically, and the equipment shall be timely repaired,
After troubleshooting, you still need to confirm the sound calibration.
e) Each live sound calibration should be recorded.
8.3 Automatic noise monitoring system Daily remote inspection, regular on-site inspection and maintenance (at least once a month, according to the actual situation
Can improve inspection frequency), each year to conduct a comprehensive inspection and maintenance of hardware and software. Noise monitoring system inspection and maintenance requirements, see Appendix C.
48.4 Anomalous monitoring data due to instrument failure is invalid data, not involved in various data statistics, but can not be deleted.
8.5 should ensure that the noise automatic monitoring site monthly normal working hours to reach more than 80%.
8.6 Regularly (at least once a month) back up the functional area of the acoustic environment quality automatically monitor the raw data and archive each year.
9 others
9.1 According to the management needs of automatic monitoring site can increase meteorological monitoring unit (priority in 0 ~ 2 functional area site installation), traffic monitoring
Unit, spectrum measurement and analysis unit, automatic recording of noise events and video surveillance equipment.
9.2 functional area acoustic environment quality monitoring point adjustment should meet the requirements of HJ 640 in the relevant provisions.
5 Appendix A.
(Informative)
Functional area acoustic environment quality automatic monitoring points to determine the procedure
In order to ensure that the noise automatic monitoring point can correctly reflect the acoustic environment quality in the functional area and follow the principle of laying points,
Stable and accurate operation, the following monitoring points should be implemented to determine the procedure.
A.1 If the original functional area monitoring point meets the requirements, install the automatic noise monitoring instrument directly at that point.
A.2 If you want to add a new point, the following steps to put forward alternative points
a) According to the GB 3096 acoustic environment functional area census monitoring method, all kinds of functional areas rough out its equivalent sound level and the functional area average
There is no significant difference between the equivalent sound levels, which can reflect some of the measuring points of the acoustic environmental quality characteristics of such functional areas as alternatives. The number of alternative points should be
Is the proposed number of points 2 to 3 times.
b) Conduct field investigation on alternative sites to determine whether they meet the principle of site deployment and whether they have the establishment conditions.
c) For the alternative points satisfying the layout conditions of the points, draw a sketch map of the present state of the environment within.200 m around the candidate points, including.
Road (marking the number of lanes, traffic and other information), buildings (marked height, purpose and other information), fixed sound source, green belt, etc.
The amount of acoustic environment quality of the situation.
A.3 Prepare options for monitoring points and report them to the provincial environmental monitoring department, organize experts to inspect the site, determine the automatic monitoring points
After reporting to the China Environmental Monitoring Station for the record.
Appendix B
(Informative)
Functional area acoustic environment quality analysis method
B.1 Long-term trends statistics
B.1.1 Analysis of 24-Hour Noise Tendency. Draw a 24-hour sound level change graph. When plotting the overall time map, the same point is not
Equivalent energy level of equivalent sound level of the same date is adopted, and equivalent hour level of sound of different points of the same type of function area is adopted arithmetic mean.
B.1.2 Analysis of long-term means. calculate the monthly, quarter, year of each monitoring point, the equivalent sound level at night, the average energy, with reference to GB 3096
In the corresponding environmental noise limits for analysis and evaluation.
B.1.3 Analysis of long-term noise distribution trends. statistical monthly, seasonal and annual monitoring points at day and night equivalent sound level distribution,
Analyze the normal noise level at this point and the noise level during emergencies.
B.1.4 Comparison of various types of functional areas Features. From the various functional areas of the month, season, year-day, night average equivalent sound level, 24-hour change
Trends, 12 months of change trends and excessive situation, etc., analysis of various types of functional areas.
B.2 related factor analysis
B.2.1 Statistical Coverage and Population. Calculate the coverage area and population of all kinds of acoustic environment functional areas, and analyze the sound ring of various functional areas
The quantity and influence of the population represented by the environmental quality monitoring results.
B.2.2 Analysis of Exceeded Data. The average over-standard range and over-standard range distribution of each monitoring site for each quarter and year are counted. For the excess number
According to record the reasons for exceeding the standard, functional areas of the main reasons for excessive sound environment.
B.2.3 Analysis of the impact of meteorological factors.
a) If the mean wind speed is greater than 5 m/s or if the precipitation is greater than 0, the minute sound level data is removed. Refer to 6.2 for the minimum supervision
Time requirements of the calculation of day and night equivalent sound level, and unrecorded daytime, nighttime equivalent sound level comparison, assessment of wind speed, precipitation
Influence of Quantity on Sound Environment Quality in Functional Area.
b) Compare the difference between the equivalent sound level and the monthly average of daytime and nighttime of special meteorological conditions such as windy weather, precipitation and lightning,
Meteorological factors.
7 Appendix C
(Informative)
Noise automatic monitoring system inspection and maintenance requirements
C.1 General
C.1.1 For each point of equipment should establish a file, including point information (site number, address, elevation, latitude and longitude, etc.), equipment
Information (instrument type, serial number, running time, IP address, etc.), instrument troubleshooting records, etc.
C.1.2 Typhoon, Blizzard, dust and other special weather protection work should be done in advance, if necessary, power, remove the microphone, check the machine
Box sealed. After the strong convective weather, should increase the site inspection maintenance.
C.1.3 inspection and maintenance by professionals. After inspection and maintenance should make a record, the record includes the name of the maintenance person, maintenance time
Between, the site status, site status of each component, fault handling information.
C.1.4 Ensure adequate spare parts and spare equipment. According to the actual needs of additional purchase, to continuously adjust and supplement.
C.2 routine inspection
C.2.1 should be timed daily self-test.
C.2.2 Daily check the data transmission status of each monitoring site is normal. If you find a site data transmission anomalies, should immediately identify the original
Because of and troubleshooting. Short time can not solve the problem of data transmission, should be promptly from the site terminal manually back up data.
C.2.3 daily monitoring system through the remote site to check the health status of each site is normal.
C.2.4 daily site clock and calendar settings should be checked, if the clock and calendar errors should be promptly adjusted.
C.2.5 The daily recording of noise events at each site shall be played back and the main noise sources shall be noted.
C.2.6 daily data should be checked for anomalies, such as. data is very high or low, unchanged or with a few days ago the average difference between the larger and so on.
When abnormal values occur, they shall not be deleted without authorization. First, check the cause of abnormal data and then judge whether the data is valid or not according to the reasons.
C.2.7 daily inspection should be recorded daily.
C.3 Regular inspection and maintenance
C.3.1 The sound calibration should be performed regularly (at least once a month).
C.3.2 Check the site bracket, chassis appearance is intact. Check the microphone, extension cable, lightning protection facilities and other external equipment is damaged
Bad, with foreign objects.
C.3.3 automatic monitoring of noise inside and outside the chassis clean.
C.3.4 Check the working status of the instrument and system parameters are normal, power, fans, communications equipment and auxiliary facilities are stable,
For replacement, the site should be replaced with spare parts, inspection and maintenance requirements in Table C.1.
8 Table C.1 each equipment inspection and maintenance requirements
Device Name Maintenance Object Check the maintenance contents
microphone
Microphone appearance is deformed, damaged, the sound calibration
Windshield is subject to weathering and cleaning
Noise Analyzer
Check all the electrical parameters are normal
Open to check for trip
Network equipment check router working status, communication data transmission is normal
Auxiliary equipment
Whether the power supply is operating normally
Solar battery/dry battery voltage is stable, whether undervoltage, liquid leakage
Meteorometer is clean, no deformation, no damage
Car flow meter traffic flow is accurate
Fan ventilation is normal, whether abnormal sound
C.3.5 Check whether the connecting lines of the instrument are reliable, including the power connecting lines, communication equipment connecting lines, microphone connecting lines and so on.
C.3.6 The hand-held anemometer is used to check the wind speed value automatically monitored by the weather unit.
C.3.7 to do inspection and maintenance records. Problems should be promptly handled to ensure that the system can operate safely.
C.3.8 Back up the original data of the automatic monitoring of the acoustic environment quality of the functional zone in the previous month, including weather, traffic flow and other related data.
C.4 Annual Maintenance
C.4.1 Inventory inventories of spare parts, put forward the purchase plan of spare parts for instruments of the year to ensure the normal operation of the automatic noise monitoring system.
C.4.2 according to the manufacturer's instructions provided by the use and maintenance manual, according to the use of accessories, timely replacement of wind in the monitoring equipment
Cover, routers and other accessories.
C.4.3 Depending on the degree of aging of the chassis, brackets and other external parts for maintenance, such as. replacement parts, spraying anti-rust paint, etc., to ensure site safety
stable.
C.4.4 The circuit boards, wires, the aging of a variety of joints to detect and identify problems and security risks timely replacement.
C.4.5 Conduct a comprehensive inspection of the server and system software, etc., check the operation status, security holes, occupancy of resources, remaining storage
Space, whether the virus, etc., if necessary, should be upgraded hardware and software.
C.4.6 Record the maintenance and replacement of parts.
C.4.7 Archive the original monitoring data of the previous year.
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