CN110296847A - A kind of noise rating method of integral new-energy passenger - Google Patents

Abstract

The invention discloses a kind of noise rating methods of integral new-energy passenger, and steps are as follows: step 1, from the sound pressure level curve transferred in test data in noise data as sample sound, sample sound is divided into m equal part, every equal part is as an independent region；Step 2 carries out recording playback to the sample sound in a certain region by software, and 5~10 people of Test Engineer group and 5~10 people of user group preferably go out to experience good sonic profile n and n >=2 jointly, and are based on preferred sample drawing enveloping outer enclosure；Enveloping outer enclosure in m area is connected in turn by step 3, forms whole envelope, i.e. reference standard；When the sound quality of a certain vehicle of step 4, entry evaluation, directly by the sound pressure level curve comparison reference standard of test sample.

Description

A kind of noise rating method of integral new-energy passenger

Technical field:

The present invention relates to a kind of noise rating methods of integral new-energy passenger, belong to pure electric coach NVH measuring technology neck Domain.

Background technique:

The evaluation method of sound quality can be divided into subjective assessment and objectively evaluate.Sound quality subjective assessment is certain to understand Impression of the feature and people of sound to it, and the evaluation method analyzed slave data acquisition, audition test to data designed. Subjective assessment can deepen the understanding to acoustical signal, obtain the more comprehensive evaluation for acoustical signal；The objective of sound quality is commented Valence technology depends on subjective assessment technology, and the existing objective amount of sound quality can not carry out complete description to sound quality, new The it is proposed of the objective amount of sound quality must be based on a large amount of subjective assessment；The accuracy that sound quality objectively evaluates result needs logical Subjective assessment is crossed to verify.

Sound quality evaluation for integral new-energy passenger, it is considered that the vehicle that interior surveyed sound pressure level is lower than 78dB (A) is The vehicle of sound quality qualification, but produce in practice, the sound pressure level of a vehicle to be measured is 76dB (A), still occur being difficult to receive drone Boom, so this evaluation method is very unilateral.Since sound quality is related to its loudness, sharpness, these indexs of fluctuation degree, but Their calculation formula is complex, and design conditions are ideal, and influence factor is more, and it is real can not to adapt to allegro production Border.

Summary of the invention:

The present invention is to provide a kind of noise rating of integral new-energy passenger to solve the above-mentioned problems of the prior art Method.

The technical solution adopted in the present invention has: a kind of noise rating method of integral new-energy passenger, steps are as follows:

Step 1, from the sound pressure level curve transferred in test data in noise data as sample sound, sample sound is drawn It is divided into m equal part, every equal part is as an independent region；

Step 2 carries out recording playback, Test Engineer group 5~10 to the sample sound in a certain region by software People and 5~10 people of user group preferably go out to experience good sonic profile n and n >=2 jointly, and based on outside preferred sample drawing Envelope；

Enveloping outer enclosure in m area is connected in turn by step 3, forms whole envelope, i.e. reference standard；

When the sound quality of a certain vehicle of step 4, entry evaluation, directly by the sound pressure level curve comparison of test sample with reference to mark It is quasi-.

The invention has the following beneficial effects:

(1) preferably goes out several higher samples of sound quality from multiple groups sample sound, and draws the suitable envelope of standard Line, the reference standard as sample sound；

(2) will have the sample sound of noise problem with reference to making comparisons, and can intuitively show that noise or abnormal sound are higher by The numerical value of range；

(3) compares the line style of reference curve, can intuitively judge that the sound quality of sample sound collected is horizontal；

(4) envelope in the present invention and sample sound to be assessed compare, can entry evaluation sound by linear comparison The sound quality superiority and inferiority of sample can intuitively obtain sample sound beyond term of reference by the comparison of sound pressure level under each revolving speed Specific value.

Detailed description of the invention:

Fig. 1 is the specific work process figure of the noise rating method of integral new-energy passenger of the present invention.

Fig. 2 is sample sound segmentation.

Fig. 3 be the 1. section be segmented the drafting of envelope.

Fig. 4 be the 2. section be segmented the drafting of envelope.

Fig. 5 is the drafting for accelerating overall process entirety envelope.

Specific embodiment:

The present invention will be further described below with reference to the drawings.

Measurement condition: on straight road, when car is only turned on the aircondition, vehicle to be measured accelerates to restricted speed from static, The corresponding motor speed of restricted speed is 3000rpm.The noise rating method of integral new-energy passenger of the present invention, steps are as follows:

Step 1, from the sound pressure level curve transferred in test data in noise data as sample sound, sample sound is drawn It is divided into m equal part, every equal part is as an independent region；

Step 2 carries out recording playback, Test Engineer group (5~10 to the sample sound in a certain region by software People) with user group (5~10 people) is common preferably goes out to experience good sonic profile n (n >=2) item, and drawn based on preferred sample Enveloping outer enclosure (segmentation envelope) processed；

Envelope in m area is connected in turn by step 3, forms whole envelope, i.e. reference standard.

When the sound quality of a certain vehicle of step 4, entry evaluation, directly by the sound pressure level curve comparison of test sample with reference to mark Standard.

With identical method, available only perform fighting air pump, inflating pump and air-conditioning open simultaneously the packet under both operating conditions Winding thread, for corresponding to the reference sample evaluated under operating condition.

The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention Protection scope.

Claims (1)

1. a kind of noise rating method of integral new-energy passenger, it is characterised in that: steps are as follows:

Step 1, from the sound pressure level curve transferred in test data in noise data as sample sound, sample sound is divided into M equal part, every equal part is as an independent region；

Step 2 carries out recording playback to the sample sound in a certain region by software, 5~10 people of Test Engineer group with 5~10 people of user group preferably goes out to experience good sonic profile n and n >=2 jointly, and is based on preferred sample drawing external envelope Line；

Enveloping outer enclosure in m area is connected in turn by step 3, forms whole envelope, i.e. reference standard；

When the sound quality of a certain vehicle of step 4, entry evaluation, directly by the sound pressure level curve comparison reference standard of test sample.