An invention patent authorized by Zhejiang Institute of Metrology in the field of acoustic testing

[ Instrument R & D of Instrument Network ] With the continuous development of modern industry, environmental pollution has also occurred. Noise pollution, as a type of environmental pollution, has become a major hazard to human society. Noise pollution, water pollution, air pollution, and solid waste pollution are known as the four major environmental problems worldwide.

The currently widely used noise test method is to use a noise measuring instrument to complete by artificial means. When it is necessary to continuously monitor the noise within a period of time, the monitoring personnel need to stay at the test point for a long time and perform instrument operation from time to time. Sometimes, in order to obtain real and complete noise data, in order to achieve the statistics, evaluation and control of noise data, it is necessary to conduct noise test on the monitored objects for 24 hours or more, and the work of noise monitoring personnel It is very hard and consumes a lot of manpower and material resources. Technicians usually need to arrange a large number of data connection lines to detect the internal noise of the building, which is used to connect the sound level meter (microphone) and the data receiving end, which causes trouble in the spatial layout of the connection line, and the control end cannot simultaneously detect multiple noise collection points The data collection and the synchronous processing of the data make the detection efficiency and data quality unable to be substantially guaranteed.

With the advent of wireless sensor networks, the possibility of wireless online measurement of noise monitoring has been realized, and it has become an urgent need for noise testing workers such as environmental noise monitoring, architectural acoustics, and material acoustics.

Recently, "A Multi-channel Wireless Noise Testing Method and Device" applied by Zhejiang Institute of Metrology has been granted the national invention patent authorization. The invention patent can be widely used in the fields of environmental noise monitoring, building acoustic testing, etc., to achieve intelligent and systematic testing of noise.

The invention patent is uniquely innovative and novel. First build a wireless sensor network based on wireless transmission technology (ZIGBEE, WIFI, etc.), then form an optimal monitoring mode according to the noise transmission situation and the actual test distance, and display and analyze the overall noise of a monitoring area through multiple noise test paths Finally, the "many-to-one" noise monitoring and evaluation effect is achieved. This monitoring mode is conducive to the development of the current noise area testing technology and can more intuitively display the overall distribution of the noise area.

Zhejiang Provincial Institute of Metrology has long been devoted to the research of metrological problems in the field of noise testing, carried out technical research, actively promoted the transformation of scientific and technological achievements and horizontal technical services; undertaken the formulation of national metrological technical specifications and Zhejiang manufacturing standards; independently developed environmental noise automatic monitoring system detection Device; take the lead in establishing social public measurement standards, carry out related measurement verification work, to ensure the accuracy and reliability of the province's noise monitoring data.