Test structure and method of automobile skylight wind vibration noises

Abstract

The invention relates to a road test structure and method of automobile skylight wind vibration noises. The test structure comprises a wind speed signal acquisition unit and an automobile speed signal acquisition unit. The test structure is characterized in that the output ends of the wind speed signal acquisition unit and the automobile speed signal acquisition unit are respectively connected with the input end of a real speed generating unit; and the output end of the real speed generating unit is divided into two paths, wherein one path is connected with the input end of a signal processing unit through the real speed generating unit, and the other path sequentially passes through an in-automobile cavity, a noise generating unit and a noise acquisition unit, and then is connected to the input end of the signal processing unit. With the test structure adopted, the objective data of the automobile skylight wind vibration noises can be obtained in an actual road in most direct manner, and the test data can be analyzed through acoustic software, and a frequency characteristic which with changes speed and assist in generating maximum wind vibration noises is calculated; and the reading of an anemometer in a uniform working condition is determined as real speed corresponding to wind vibration noise generation and is adopted as objective evaluation. The method has the advantages of simple operation, low cost, strong applicability and the like.

Description

technical field [0001] The invention relates to the technical field of testing wind vibration noise generated by a car with the sunroof open, in particular to a test structure and method for wind vibration noise of a car running on a road with the sunroof fully opened. Background technique [0002] In recent years, consumers have increasingly higher requirements for the safety and comfort of cars, and the air pollution in the car will seriously affect the health of drivers and passengers, especially after the car has been sealed for a period of time, the cabin is full of harmful substances. substance gas. The car sunroof uses its superior negative pressure ventilation principle to filter the air inside the car when the car is running, protecting the health of the driver and passengers while allowing the occupants to enjoy driving fun. The car sunroof also has the functions of rapid cooling, defrosting and defogging , so it becomes one of the main components of the car's hig...

AI Technical Summary

Problems solved by technology

In the early stage of automobile development, engineers can predict whether a certain model will generate wind-induced noise and noise frequency through numerical simulation. However, in the actual vehicle verification stage, only a few automobile companies will pay attention to the wind-induced noise of the sunroof, and only in the Tests are carried out in the wind tunnel laboratory, and there is a lack of standardized real vehicle road tests to verify the wind vibration noise of the sunroof, which is an indispensable content in the development and verification process of automobiles

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