CN108120497A - A kind of noise rating system of electronic brake system - Google Patents
A kind of noise rating system of electronic brake system Download PDFInfo
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- CN108120497A CN108120497A CN201711322500.7A CN201711322500A CN108120497A CN 108120497 A CN108120497 A CN 108120497A CN 201711322500 A CN201711322500 A CN 201711322500A CN 108120497 A CN108120497 A CN 108120497A
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- noise
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- signal
- electronic brake
- acquisition module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention discloses a kind of noise rating system of electronic brake system, belong to the technology in system testing field, including：Drive control module, the drive control module are connected with the electronic brake system, the electronic brake system to be controlled to operate the brake block of vehicle；First signal acquisition module, first signal acquisition module gather the noise signal that the electronic brake system is generated when operating the brake block；Signal processing module, the signal processing module are connected with first signal acquisition module, for receiving the noise signal and the overall sound pressure level of the electronic brake system being calculated；Noise rating module, the noise rating module are connected with the signal processing module, for the overall sound pressure level and default noise objective to be compared, and export comparing result.The advantageous effect of the technical solution is：The present invention is not required operator to possess substantial amounts of detection experience and relevant professional knowledge, and suitable for on-line checking, detection range is wide, easy to operate, of low cost.
Description
Technical field
The present invention relates to a kind of technologies in system testing field, are specifically a kind of noise of electronic brake system
Evaluation system.
Background technology
Auto NVH (Noise Vibration Harshness, noise, vibration, sound vibration roughness) performance is improved early to have become
For one of automobile industry primary study content.The control of vehicle NVH is often done since the NVH of auto parts and components, is promoted
The NVH performances of auto parts and components have become the effective way for improving automobile industry product competitiveness.
With vehicle intellectualized development, traditional IPB (comprehensive parkings are replaced using electronic brake system (EPB)
System) it has been trend of the times.Therefore, the control of EPB noise levels will be particularly important.
At present, it yet there are no noise rating of the related EPB noise ratings system for EPB.
The power of one sound is measured usually using sound pressure level, sound intensity level and acoustic power level.Wherein, total sound of A weighteds
It is one of the most frequently used acoustical parameter to evaluate noise level in automobile noise field to arbitrarily downgrade.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a kind of noise rating system of electronic brake system
System.The present invention is not required operator to possess substantial amounts of detection experience and relevant professional knowledge, suitable for on-line checking, detection range
Extensively, it is easy to operate, it is of low cost.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of noise rating system of electronic brake system, wherein, including：
Drive control module, the drive control module are connected with the electronic brake system, to control the electricity
Sub- parking braking system operates the brake block of vehicle；
First signal acquisition module, first signal acquisition module gather the electronic brake system in operation institute
State the noise signal generated during brake block；
Signal processing module, the signal processing module are connected with first signal acquisition module, described for receiving
Noise signal and the overall sound pressure level that the electronic brake system is calculated；
Noise rating module, the noise rating module are connected with the signal processing module, for by total acoustic pressure
Grade is compared with default noise objective, and exports comparing result.
Preferably, the noise rating system of the electronic brake system, wherein, it further includes：
Secondary signal acquisition module, connects the drive control module, and the secondary signal acquisition module is used to gather institute
State the current signal that electronic brake system is generated when operating the brake block；
The current signal that the drive control module is used to be collected according to the secondary signal acquisition module controls
The electronic brake system operates the brake block.
Preferably, the noise rating system of the electronic brake system, wherein, the secondary signal acquisition module also connects
Connect the signal processing module；
The signal processing module persistently obtains the current signal that the secondary signal acquisition module collects, and
The current signal carries out the noise signal overall sound pressure level is calculated when being in a default current range.
Preferably, the noise rating system of the electronic brake system, wherein, it further includes：
Alarm module connects the noise rating module, and the alarm module is used to receive the comparing result, and in institute
Comparing result is stated to represent to send alarm when the overall sound pressure level is more than the default noise objective.
Preferably, the noise rating system of the electronic brake system, wherein, first signal acquisition module is one
Microphone；
The microphone is arranged above the electronic brake system and at a distance of a pre-determined distance.
Preferably, the noise rating system of the electronic brake system, wherein, the pre-determined distance is 30cm.
Preferably, the noise rating system of the electronic brake system, wherein, the secondary signal acquisition module is one
Current sensor.
Preferably, the noise rating system of the electronic brake system, wherein, the current sensor is pincerlike electric current
Table.
Preferably, the noise rating system of the electronic brake system, wherein, the signal processing module is using following
Formula manipulation obtains the overall sound pressure level：
Wherein：LpFor the overall sound pressure level, p is the noise signal, p0For a default acoustic pressure a reference value.
Preferably, the noise rating system of the electronic brake system, wherein, the acoustic pressure a reference value p0=2 × 10- 5Pa。
The advantageous effect of above-mentioned technical proposal is：The present invention is not required that operator possesses substantial amounts of detection experience and correlation is special
Industry knowledge, suitable for on-line checking, detection range is wide, easy to operate, of low cost.
Description of the drawings
Fig. 1 is in the preferred embodiment of the present invention, and a kind of noise rating system structure of electronic brake system is shown
It is intended to；
Fig. 2 is overall sound pressure level curve in the preferred embodiment of the present invention；
In figure：1 drive control module, 2 first signal acquisition modules, 3 secondary signal acquisition modules, 4 signal processing modules,
5 noise rating modules, 6 electronic brake systems, 7 alarm modules.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described in the following with reference to the drawings and specific embodiments, but not as limiting to the invention.
As shown in Figure 1, the present embodiment is related to a kind of noise rating system of electronic brake system, including：
Drive control module 1, drive control module 1 are connected with electronic brake system 6, to control electronic brake
System 6 operates the brake block of vehicle；
First signal acquisition module 2, the first signal acquisition module 2 gather electronic brake system 6 in operation brake block
When the noise signal that generates；
Signal processing module 4, signal processing module 4 are connected with the first signal acquisition module 2, for receiving noise signal simultaneously
The overall sound pressure level of electronic brake system 6 is calculated；
Noise rating module 5, noise rating module 5 are connected with signal processing module 4, for by overall sound pressure level with it is default
Noise objective compares, and exports comparing result.
Noise rating system further includes：
Secondary signal acquisition module 3, connects drive control module 1, and secondary signal acquisition module 3 is used to gather electronic parking
The current signal that braking system 6 is generated when operating brake block；
The current signal that drive control module 1 is used to be collected according to secondary signal acquisition module 3 controls electronic parking system
Dynamic system 6 operates brake block, that is, clamps brake block, release brake block and stop clamping.
Secondary signal acquisition module 3 is also connected with signal processing module 4.
Signal processing module 4 persistently obtains the current signal that secondary signal acquisition module 3 collects, and at current signal
Noise signal is carried out when in a default current range overall sound pressure level is calculated.
Noise rating system further includes：
Alarm module 7, connection noise rating module 5, alarm module 7 are used to receive comparing result, and in comparing result table
Show and send alarm when overall sound pressure level is more than default noise objective.
Noise rating module 5 is by overall sound pressure level LpWith default noise objective S0Compare, if comparing result is Lp＞ S0Then report
Alert module 7 sends alarm.
First signal acquisition module 2 is a microphone；
Microphone is arranged at 6 top of electronic brake system and at a distance of a pre-determined distance.
Pre-determined distance is 30cm.
Secondary signal acquisition module 3 is a current sensor.
Current sensor is clamp on amperemeter.
Signal processing module 4 obtains overall sound pressure level using following formula manipulation：
Wherein：LpFor overall sound pressure level, p is noise signal, p0For a default acoustic pressure a reference value.
Acoustic pressure a reference value takes p0=2 × 10-5Pa。
As shown in Fig. 2, noise rating module 5, for evaluating skies of the EPB during clamping brake block and discharging brake block
Turn the noise for the period that the frictional force between period i.e. brake block and brake disc is zero.Whether EPB may determine that by current value
It is idling periods when the current value I of current signal instruction can be set to be 0.4-1.2A in idling periods.Current value I is 0.4-
During 1.2A, i.e., in default current range, noise rating module 5 compares overall sound pressure level and default noise objective, if Lp
＞ S0Then noise rating module 5 exports unqualified signal, and alarm module 7 simultaneously sends alarm, is connected with noise rating module 5 upper
Position machine shows that NG represents unqualified.If Lp＜ S0When, noise rating module 5 exports qualifying signal, is connected with noise rating module 5
Host computer show that OK represents qualified.
The noise rating system of the electronic brake system of the present invention, compared with prior art：The present invention need not grasp
Author possesses substantial amounts of detection experience and relevant professional knowledge, and suitable for on-line checking, detection range is wide, easy to operate, cost
It is cheap.
The foregoing is merely preferred embodiments of the present invention, not thereby limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent substitution and obviously change obtained scheme, should all include within the scope of the present invention.
Claims (10)
1. a kind of noise rating system of electronic brake system, which is characterized in that including：
Drive control module, the drive control module are connected with the electronic brake system, the electronics to be controlled to stay
Vehicle braking system operates the brake block of vehicle；
First signal acquisition module, first signal acquisition module gather the electronic brake system and are operating the brake
The noise signal generated during vehicle piece；
Signal processing module, the signal processing module are connected with first signal acquisition module, for receiving the noise
Signal and the overall sound pressure level that the electronic brake system is calculated；
Noise rating module, the noise rating module are connected with the signal processing module, for by the overall sound pressure level with
Default noise objective comparison, and export comparing result.
2. noise rating system according to claim 1, it is characterized in that, it further includes：
Secondary signal acquisition module, connects the drive control module, and the secondary signal acquisition module is used to gather the electricity
The current signal that sub- parking braking system is generated when operating the brake block；
The drive control module is used for according to the current signal control that the secondary signal acquisition module collects
Electronic brake system operates the brake block.
3. noise rating system according to claim 2, it is characterized in that, the secondary signal acquisition module is also connected with described
Signal processing module；
The signal processing module persistently obtains the current signal that the secondary signal acquisition module collects, and described
Current signal carries out the noise signal overall sound pressure level is calculated when being in a default current range.
4. noise rating system according to claim 1, it is characterized in that, it further includes：
Alarm module connects the noise rating module, and the alarm module is used to receive the comparing result, and described right
Alarm is sent when representing that the overall sound pressure level is more than the default noise objective than result.
5. noise rating system according to claim 1, it is characterized in that,
First signal acquisition module is a microphone；
The microphone is arranged above the electronic brake system and at a distance of a pre-determined distance.
6. noise rating system according to claim 5, it is characterized in that, the pre-determined distance is 30cm.
7. noise rating system according to claim 2, it is characterized in that, the secondary signal acquisition module passes for an electric current
Sensor.
8. noise rating system according to claim 7, it is characterized in that, the current sensor is clamp on amperemeter.
9. noise rating system according to claim 1, it is characterized in that, the signal processing module is using at following formula
Reason obtains the overall sound pressure level：
<mrow>
<msub>
<mi>L</mi>
<mi>p</mi>
</msub>
<mo>=</mo>
<mn>20</mn>
<mi>lg</mi>
<mfrac>
<mi>p</mi>
<msub>
<mi>p</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>;</mo>
</mrow>
Wherein：LpFor the overall sound pressure level, p is the noise signal, p0For a default acoustic pressure a reference value.
10. noise rating system according to claim 1, it is characterized in that, the acoustic pressure a reference value p0=2 × 10-5Pa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711322500.7A CN108120497B (en) | 2017-12-12 | 2017-12-12 | Noise evaluation system of electronic parking braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711322500.7A CN108120497B (en) | 2017-12-12 | 2017-12-12 | Noise evaluation system of electronic parking braking system |
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| CN108120497A true CN108120497A (en) | 2018-06-05 |
| CN108120497B CN108120497B (en) | 2020-02-14 |
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Cited By (4)
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| CN110031083A (en) * | 2018-12-31 | 2019-07-19 | 瑞声科技(新加坡)有限公司 | A kind of noise overall sound pressure level measurement method, system and computer readable storage medium |
| CN110516364A (en) * | 2019-08-28 | 2019-11-29 | 万向钱潮（上海）汽车系统有限公司 | A kind of the noise optimization method and system of electronic brake device |
| CN110823552A (en) * | 2019-12-17 | 2020-02-21 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking caliper noise measurement device and measurement method |
| CN112729859A (en) * | 2020-12-02 | 2021-04-30 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking noise quality evaluation system and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031083A (en) * | 2018-12-31 | 2019-07-19 | 瑞声科技(新加坡)有限公司 | A kind of noise overall sound pressure level measurement method, system and computer readable storage medium |
| CN110516364A (en) * | 2019-08-28 | 2019-11-29 | 万向钱潮（上海）汽车系统有限公司 | A kind of the noise optimization method and system of electronic brake device |
| CN110516364B (en) * | 2019-08-28 | 2023-06-16 | 万向钱潮（上海）汽车系统有限公司 | Noise optimization method and system for electronic parking brake device |
| CN110823552A (en) * | 2019-12-17 | 2020-02-21 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking caliper noise measurement device and measurement method |
| CN110823552B (en) * | 2019-12-17 | 2022-04-22 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking caliper noise measurement device and measurement method |
| CN112729859A (en) * | 2020-12-02 | 2021-04-30 | 万向钱潮（上海）汽车系统有限公司 | Electronic parking noise quality evaluation system and method |
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