Abnormal sound grade judgment method for in-vehicle air conditioner system

Abstract

The invention discloses an abnormal sound grade judgment method for an in-vehicle air conditioner system. The method comprises the steps: step 1, obtaining multiple sets of noise data samples of an in-vehicle air conditioner; step 2, screening out abnormal sound points in each group of noise data samples; obtaining a plurality of loudness time-domain curves, a plurality of sharpness time-domain curves and a plurality of roughness time-domain curves of the in-vehicle air-conditioning noise according to the plurality of groups of noise data samples in a one-to-one correspondence manner; step 3, according to the loudness time-domain curve, the sharpness time-domain curve and the roughness time-domain curve of the in-vehicle air conditioner noise, determining the abnormal sound risk coefficient of the in-vehicle air conditioner; according to the loudness value of the abnormal sound point, the sharpness value of the abnormal sound point and the roughness value of the abnormal sound point, obtaining a loudness value deducted score, a sharpness value deducted score and a roughness value deducted score of the abnormal sound point; calculating the abnormal sound score AG of the air conditioner in the vehicle; and step 4, judging the abnormal sound grade of the in-vehicle air conditioner according to the abnormal sound score AG, and judging whether the abnormal sound of the in-vehicle air conditioner meets the use requirement or not.

Description

technical field [0001] The invention belongs to the technical field of vehicle vibration and noise testing, and in particular relates to a method for judging the level of abnormal noise of an air-conditioning system in a vehicle. Background technique [0002] With the improvement of automobile performance, drivers and passengers have higher and higher requirements for the ride comfort of the vehicle. With the widespread application of pure electric vehicles, the noise level inside the car has been greatly reduced, and the problem of abnormal noise inside the vehicle has become particularly prominent inside the cabin. Among them, the problem of abnormal noise of the air-conditioning system in the car is particularly prominent. Due to the large volume of the air-conditioning system, many parts are involved, the cooperation between the parts is complicated, the operating conditions are complicated and it is close to the driver, so the problem of abnormal noise of the air-condit...

AI Technical Summary

Problems solved by technology

[0003] In order to evaluate the abnormal sound level and abnormal sound risk level of the air-conditioning system in the car, the traditional subjective judgment method has a large cost of manpower and material resources; moreover, because there are many noise interference factors in the car, the sound source location is difficult and subjectivity is high, and the noise data Difficulty generating visual text for quantitative description

At present, there is no reliable and objective evaluation method for the abnormal sound level and risk level of the in-vehicle air-conditioning system, so an objective method and system for evaluating the risk level and abnormal sound level of the in-vehicle air-conditioning system are needed

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