System and method for detecting sound transmission characteristics of tunnel multi-section

Abstract

The invention relates to a system and method for detecting sound transmission characteristics of a tunnel multi-section, and belongs to the technical field of measurement of noise transmission characteristics of tunnels. The system for detecting sound transmission characteristics of the tunnel multi-section comprises a host computer, a host controller, section sub-controllers, wireless external synchronization sound wave acquisition modules, wireless access points and the like, wherein the host computer, the host controller, the section sub-controller on each section, and the wireless external synchronization sound wave acquisition module of each acquisition point are sequentially connected, and the wireless access points are respectively connected with the wireless external synchronization sound wave acquisition modules, the host computer and a mobile sound source. The invention also provides a method for detecting sound transmission characteristics of the tunnel multi-section. The sub-section multi-point measuring method is adopted, and the system is flexible and has stronger practicality; a WIFI network is established on the basis of wireless access points, so that the problems of laying difficulty and easiness in interference production of wired cables in tunnel multi-point measurement are solved in the installation work; and the reliability and validity of noise data transmission are ensured.

Description

technical field [0001] The invention particularly relates to a multi-section sound transmission characteristic detection system and method of a tunnel, belonging to the field of tunnel noise sound propagation characteristic measurement. Background technique [0002] Due to the arched, circular or rectangular semi-enclosed space structure of the existing tunnel, sound reflections will occur when the sound reaches the tunnel interface, and its direct sound will be mixed with the sound waves after multiple reflections from the wall, that is, different frequencies, amplitudes and times. The sound waves are superimposed or reduced in different areas, resulting in a larger boost in the tunnel, forming a special noise law in the tunnel, resulting in a larger noise value. The intensity of this noise is much greater than the noise intensity produced when the vehicle passes through the free field, which has brought adverse effects to the drivers and passengers. To reduce the harm cau...

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Problems solved by technology

[0004] The present invention provides a multi-section tunnel sound transmission characteristic detection system and method in order to overcome the shortcomings of the prior art that it cannot acquire multi-point synchronously, and uses wired cables for signal transmission, which is difficult to build and has high interference.

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