An environmental noise monitoring instrument

CN120576873BActive Publication Date: 2026-07-03NATIONAL INSTITUTE OF METROLOGY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NATIONAL INSTITUTE OF METROLOGY CHINA
Filing Date
2025-06-24
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing environmental noise monitoring instruments have problems such as being unable to perform in-situ automatic calibration during the calibration process, requiring external tools for assistance, and failing to accurately reflect the performance status of the equipment.

Method used

An environmental noise monitoring instrument was designed, which uses the coupled cavity method for in-situ automatic sound calibration. The instrument uses a microcontroller to control a servo motor to drive the disassembly and assembly of the coupled cavity, and combines a sound source control module to emit sound signals of different frequencies. The calibration is performed by using wind speed and rainfall information feedback, and the results are fed back to the host computer.

Benefits of technology

It enables in-situ automatic calibration of environmental noise monitors, improving calibration accuracy and automation, and reducing the need for manual operation.

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Abstract

This invention discloses a multifunctional windproof cover for remote in-situ calibration of an environmental noise monitoring instrument, relating to the field of environmental noise monitoring technology. It includes a monitoring instrument host, with a fixed housing fixedly connected to the top of the host. A mounting shell is located on the top of the fixed housing, and a connecting block is fixedly connected to the top of the mounting shell. This multifunctional windproof cover for remote in-situ calibration of the environmental noise monitoring instrument innovatively constructs a detachable coupling cavity structure. The coupling cavity method enables in-situ automatic acoustic calibration of the environmental noise monitoring instrument. The microcontroller's functions include receiving calibration / end calibration commands from the host computer; controlling the disassembly and assembly of the coupling cavity through a motor drive module; controlling the sound source to emit sound signals of different frequencies through a sound source control module; collecting wind speed and rainfall information from an anemometer and rain gauge and feeding it back to the host computer; and feeding back the calibration results of the environmental noise monitoring instrument to the host computer.
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