Policy background
During the formulation of the 14th Five Year Plan, the Chinese government attached great importance to the issue of noise pollution in industrial enterprises, and noise control in industrial enterprises became a key environmental protection issue. With the rapid development of the Chinese economy and the acceleration of industrialization, the number and scale of industrial enterprises continue to expand, accompanied by the increasingly serious problem of noise pollution. Noise not only affects the quality of life of surrounding residents, but may also pose a threat to the health of workers. Therefore, how to effectively control and reduce noise pollution while ensuring industrial development has become a common concern for the government and society.
The Chinese government has clearly set targets and measures for controlling noise pollution from industrial enterprises in the 14th Five Year Plan. This includes setting stricter noise emission standards, promoting industrial enterprises to adopt advanced noise reduction technologies and equipment, strengthening monitoring and management of noise pollution, and raising public awareness of the hazards of noise pollution.
Project Background
According to relevant laws, regulations, and standards, industrial enterprises need to monitor and control the noise generated during the production process to ensure that it does not exceed the prescribed noise emission standards and safeguard the environment and residents? health. In order to effectively control and reduce the impact of industrial noise on the environment and human health, an Osen industrial enterprise noise automatic monitoring system has been installed in a certain area of Xuzhou. The system can monitor the noise level generated by industrial enterprises in real time, comply with national or local environmental protection standards, and provide data analysis and alarm functions to assist enterprises in taking corresponding noise reduction measures.
Simultaneously achieving the correction of noise measurement values and background noise values, accurately locating the environmental noise emissions at the boundary of industrial enterprises. Install monitoring equipment according to industrial enterprise standards and connect it to municipal platforms to achieve full coverage, thereby achieving the goal of comprehensive noise reduction. Utilize digital means to carry out noise pollution prevention and control. By monitoring the noise situation in real-time through the monitoring system, enterprises can adjust their production processes and equipment in a timely manner, optimize production processes, and improve production efficiency and quality.
Noise collection and analysis unit
1) Function:
The collection time can be remotely set;
Having data storage function;
Capable of uploading and receiving instructions;
Capable of data preprocessing;
2) Indicator:
Sampling time: 1-60s can be set arbitrarily;
Data storage: can store 60 days of raw monitoring data and operation logs;
Interface: Equipped with USB, RS232, RJ45, SD card interfaces
Support downloading data through a universal communication interface;
Equipped with event recording function, the recording adopts FLC compression and supports wireless transmission;
Reliability: Temporary power and communication failures do not affect data collection. After communication is restored, delayed data can be automatically downloaded and transmitted. Permanent power outages do not lose collected data. After terminal crashes, there is an automatic wake-up function, and the total data collection rate is not less than 95%.
The monitoring data transmission protocol complies with HJ 660-2013 "Technical Regulations for Environmental Monitoring Information Transmission"
First level noise level meter
Frequency range: 20 Hz to 20K Hz;
Measurement range: 30dB-130dB;
Measurement parameters: instantaneous sound level LP, equivalent sound level Leq, cumulative percentage sound level LN (N=5, 10, 50, 90, 95), maximum sound level Lmax, minimum sound level Lmin, standard deviation SD, etc;
Frequency weighting: A, C, Z;
Time weighting: F, S, I;
1/1 octave band analysis range: 31.5Hz-16kHz
1/3 octave band analysis range: 20Hz-20kHz
Support standard external sound source calibration, support remote self inspection, the system can set the self inspection frequency arbitrarily, and automatically prompt when the indication deviation is greater than 0.5 dB.
All-weather outdoor microphone
Sensitivity: Sensitivity greater than 30mV/Pa at 250Hz sound pressure;
Directional response: supports 0 ° and 90 ° incidence;
The microphone supports long-term outdoor use and has functions such as windproof, rainproof, dust-proof, anti-interference, and bird proof;
Windshield: not damaged at a wind speed of 30m/s;
The microphone bracket structure facilitates the installation, disassembly, and acoustic calibration of the microphone;
Communication unit
Real time transmission of noise and automatic monitoring of raw data
The data transmission mode, transmission process, transmission format, etc. shall comply with the relevant provisions of HJ660-2013;
Supports both wired and wireless communication functions. Prioritize 4G wireless transmission and reserve wired transmission function for backup.
Excessive recording playback
It has the function of triggering recording and remote playback for sounds exceeding a certain limit, and the triggering limit and recording time can be set;
Latitude and longitude unit
Automatically obtain the location of the monitoring station and upload it;
Meteorological monitoring unit
Simultaneously measure wind speed, wind direction, temperature, humidity, atmospheric pressure, and five meteorological parameters;
Wind speed: measurement range 0~60m/s, measurement accuracy ± 3%
Wind direction: Measurement range: 0~359.9 ° (no dead corners), measurement accuracy ± 3 °
Temperature: Measurement range: -30~+60 ° C, measurement accuracy: ± 0.5 ° C
Humidity: Measurement range: 0~100% RH, measurement accuracy: ± 5% RH
Atmospheric pressure: measurement range: 600-1100 hPa, measurement accuracy: ± 1 hPa
Power control unit
1) Equipped with mains and UPS power supply functions.
2) Technical requirements:
Municipal power supply power: ≥ 100W;
Configure UPS power supply to enable continuous operation of equipment for 24 hours without mains power
All-weather outdoor protective box
1) Function: Used for placing noise monitoring terminal devices and other equipment;
2) Indicator:
Material: Made of anti-corrosion and anti rust materials;
Safety: Equipped with anti-theft alarm device;
Waterproof and dustproof rating IP66
Equipped with anti vibration, impact design, high and low temperature protection design, and anti electromagnetic interference design
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