CN202940964U - Vehicle speaker durability testing device - Google Patents
Vehicle speaker durability testing device Download PDFInfo
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- CN202940964U CN202940964U CN 201220515168 CN201220515168U CN202940964U CN 202940964 U CN202940964 U CN 202940964U CN 201220515168 CN201220515168 CN 201220515168 CN 201220515168 U CN201220515168 U CN 201220515168U CN 202940964 U CN202940964 U CN 202940964U
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Abstract
The utility model discloses a vehicle speaker durability test device. The device has the advantages of simple structure and good portability, and can be conveniently applied by a vehicle manufacturer and a vehicle after sale and maintenance center to carry out automatic testing on the performance and durability of a vehicle speaker. The device comprises a computer, an electronic control unit and a testing box. The electronic control unit is respectively connected with the computer and the testing box. The electronic control unit comprises a signal conditioning module, an audio amplification circuit and a power supply module. The testing box comprises a tested speaker and a microphone. The signal conditioning module is connected with the computer. The audio amplification circuit and the microphone are connected with the signal conditioning module. The tested speaker is connected with the audio amplification circuit. The power supply module is connected with the audio amplification circuit and the signal conditioning module.
Description
Technical field
The utility model relates to a kind of loud speaker testing apparatus, relates in particular to a kind of for the speaker performance of automobile and the testing apparatus of durability thereof.
Background technology
In numerous peripheral vehicle products, the automobile entertainment product is one of main peripheral product.Wherein, auto loud hailer has directly determined the quality of automobile entertainment product as the end fitting of automobile entertainment product, comfortableness and joyful sense that its impact drives a car.So, for vehicle complete vehicle manufactory, for promoting the vehicle complete vehicle quality, need to strictly detect auto loud hailer.
Current auto loud hailer testing equipment is large-scale audio test system, although the audio frequency of loud speaker is had to test comparatively accurately, its integral device volume is large, cost is high, especially equipment is had relatively high expectations to installation environment, once equipment is installed, can not move easily.This large-scale audio test system is not suitable for large, testing location in batches and changes more vehicle complete vehicle manufacture process and automobile after-sales service process.It within open day, is the technical scheme that patent documentation that on 03 30th, 2011, publication number are CN101998221A discloses a kind of sound testing method and device of loud speaker, adopt SCM Based hardware system, 300Hz is just passed through in test to loud speaker, 1000Hz, tri-kinds of specific audio signals of 3000Hz are tested, and the test frequency is less; Secondly this technical scheme can only be tested judgement and can not make evaluation to its durability the audio performance of loud speaker.
Summary of the invention
The utility model main purpose is to provide a kind of auto loud hailer device for testing endurance, and this testing apparatus is simple in structure, and good portability is applicable in vehicle complete vehicle manufactory and automobile after-sales service, auto loud hailer performance and durability thereof be tested.
The utility model is mainly solved by following technical proposals for the prior art problem, a kind of auto loud hailer device for testing endurance, comprise computer, ECU (Electrical Control Unit) and test box, ECU (Electrical Control Unit) connects respectively computer and test box, ECU (Electrical Control Unit) comprises the signal condition module, audio amplifier circuit and power module, comprise tested speaker and microphone in test box, the signal condition module connects computer, audio amplifier circuit is connected the signal condition module with microphone, tested speaker connects audio amplifier circuit, power module connects audio amplifier circuit and signal condition module.
Computer is used to provide software control and the man-machine interface of auto loud hailer device for testing endurance; ECU (Electrical Control Unit) completes generation and the reception of test signal under the control of computer software; Test box is used for installing tested auto loud hailer and microphone, makes the audio signal between tested speaker and microphone not be subject to external interference.
The output dc voltage of power module is VCC and VCC/2, as the power supply of audio amplifier circuit; The signal condition module mainly completes analog signal, digital signal conversion; The audio output signal of signal condition module carries out power amplification by audio amplifier circuit and drives tested speaker, the acoustic signals of tested speaker is after microphone is picked up, deliver to computer and compare with the original digital audio signal of computer export and calculate the distortion factor, the tested speaker quality is made a determination; In specified period, tested speaker is carried out to the test of distortion of long duration degree, to pass judgment on the tested speaker durability.
As preferably, the signal condition module comprises microprocessor, A/D change-over circuit, D/A change-over circuit and microphone circuit, microprocessor connects A/D change-over circuit and D/A change-over circuit, and the analog input end of A/D change-over circuit connects microphone circuit, and microphone is connected to microphone circuit.Microprocessor control and management D/A change-over circuit, A/D change-over circuit, the D/A change-over circuit completes the digital signal-analog signal conversion of computer to audio amplifier circuit, the A/D change-over circuit completes microphone to the analog signal of computer-digital signal conversion, and microphone circuit be sent into A/D change-over circuit input after will microphone signal amplifying.
As preferably, the signal condition module is provided with USB interface, between signal condition module and described computer, by USB interface, is connected.Data transmission between signal condition module in computer and ECU (Electrical Control Unit) adopts the usb data bus mode, with this, strengthens the portability of system.
As preferably, the quantity of microphone is at least two.Use more than one microphone output signal to compare with the audio signal of computer export respectively, to strengthen the accuracy of distortion factor judgement.
As preferably, be provided with on computers test frequency setting key.The audio test signal frequency is set on the man-machine interface of computer and sets dialog box, at 20Hz, between 20000Hz, click setting key, can set arbitrarily the test frequency, unrestricted.
The beneficial effect that the utility model brings is, apparatus structure is simple, and good portability, applicable in vehicle complete vehicle manufactory and automobile after-sales service, auto loud hailer performance and durability thereof being tested automatically; The frequency of audio-frequency test signal can arrange arbitrarily; Carry out the loud speaker quality judging with signal distortion, its result of determination science, accurate; By test period is set on computers, can carry out easily the judge of loud speaker durability.
The accompanying drawing explanation
Fig. 1 is a kind of theory diagram of the present utility model;
Fig. 2 is a kind of test box schematic diagram of the utility model;
Fig. 3 is flow chart of the present utility model.
In figure: the 1st, computer, the 2nd, ECU (Electrical Control Unit), the 21st, power module, the 22nd, the signal condition module, the 221st, D/A change-over circuit, the 222nd, A/D change-over circuit, the 223rd, USB interface, the 224th, microphone circuit, the 225th, microprocessor, the 23rd, audio amplifier circuit, the 3rd, test box, the 31st, microphone, the 32nd, tested speaker.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: as shown in Figure 1 and Figure 2, the utility model is a kind of auto loud hailer device for testing endurance.ECU (Electrical Control Unit) 2 comprises power module 21, signal condition module 22 and audio amplifier circuit 23, and the output dc voltage of power supply mould 21 is VCC and VCC/2, as the power supply of audio amplifier circuit 23 and signal condition module 22; Signal condition module 22 comprises A/D change-over circuit 222, D/A change-over circuit 221, USB interface 223, microphone circuit 224 and microprocessor 225; Tested speaker 32 and microphone 31 are arranged in test box 3; The USB interface of computer 1 is connected to the USB interface 223 of signal condition module 22, microprocessor 225 connects USB interface 223, D/A change-over circuit 221 and A/D change-over circuit 222 are connected to microprocessor 225, the analog signal output of D/A change-over circuit 221 connects amplifier circuit for sound frequency signal 23 inputs, amplifier circuit for sound frequency signal 23 outputs connect tested speaker 32, microphone 31 connects microphone circuit 224 signal input parts, and microphone circuit 224 outputs connect the input end of analog signal of A/D change-over circuit 222.
Figure 3 shows that flow chart, at first the test frequency is set, the minimum distortion factor that allows is set
, cycle-index n is set, computer 1 sends digital signal to ECU (Electrical Control Unit) 2 afterwards, the analog output port cycle output setting audio signal f1 of signal condition module 22 ... fi ... fn, these audio signals are delivered to tested speaker 32 after audio amplifier circuit 23 amplifies, and produce the sound wave audio signal; Simultaneously the microphone 31 in test box 3 will receive corresponding audio signal f11 ... fii ... fnn delivers to the analog input port of the signal condition module 22 in ECU (Electrical Control Unit) 2, signal condition module 22 is delivered to computer 1 by the analog quantity audio signal fii received after the A/D conversion, and audio signal fi former with it carries out the distortion factor of signal and calculate.If calculate the distortion factor λ i>λ of gained, computer 1 shows " the fi frequency distortion factor exceeds standard " on man-machine interface, then finish this time test, otherwise, carrying out the test of next test frequency according to set test frequency, is a test loop until all test frequencies are completed.When all test loop reach set test loop frequency n, computer 1 shows " test by " on man-machine interface.When carrying out durability test, repeatedly carry out above-mentioned cyclic process, arrive regulation during test period, make durability evaluation.
So the utlity model has following characteristics: apparatus structure is simple, and good portability can conveniently be applicable in vehicle complete vehicle manufactory and automobile after-sales service, auto loud hailer performance and durability thereof be tested automatically; The frequency of audio-frequency test signal can arrange arbitrarily; Carry out the loud speaker quality judging with signal distortion, its result of determination science, accurate; By length of testing speech (test period) is set on computers, can carry out easily the judge of loud speaker durability.
Claims (5)
1. an auto loud hailer device for testing endurance, it is characterized in that: comprise computer, ECU (Electrical Control Unit) and test box, described ECU (Electrical Control Unit) connects respectively computer and test box, described ECU (Electrical Control Unit) comprises signal condition module, audio amplifier circuit and power module, comprise tested speaker and microphone in described test box, described signal condition module connects computer, audio amplifier circuit is connected the signal condition module with microphone, tested speaker connects audio amplifier circuit, and described power module connects audio amplifier circuit and signal condition module.
2. a kind of auto loud hailer device for testing endurance according to claim 1, it is characterized in that: described signal condition module comprises microprocessor, A/D change-over circuit, D/A change-over circuit and microphone circuit, described microprocessor connects A/D change-over circuit and D/A change-over circuit, the analog input end of described A/D change-over circuit connects microphone circuit, and described microphone is connected to microphone circuit.
3. according to the described a kind of auto loud hailer device for testing endurance of claim 1 or 2, it is characterized in that: described signal condition module is provided with USB interface, between signal condition module and described computer, by USB interface, is connected.
4. a kind of auto loud hailer device for testing endurance according to claim 1, it is characterized in that: the quantity of described microphone is at least two.
5. a kind of auto loud hailer device for testing endurance according to claim 1, is characterized in that: be provided with test frequency setting key on described computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515168 CN202940964U (en) | 2012-10-09 | 2012-10-09 | Vehicle speaker durability testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515168 CN202940964U (en) | 2012-10-09 | 2012-10-09 | Vehicle speaker durability testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940964U true CN202940964U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220515168 Expired - Fee Related CN202940964U (en) | 2012-10-09 | 2012-10-09 | Vehicle speaker durability testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202940964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607686A (en) * | 2013-10-30 | 2014-02-26 | 奇瑞汽车股份有限公司 | Motor-vehicle sound-device monitoring device and method |
| CN106683364A (en) * | 2016-11-25 | 2017-05-17 | 华京君 | Apparatus for testing endurance of blaze alarm |
-
2012
- 2012-10-09 CN CN 201220515168 patent/CN202940964U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607686A (en) * | 2013-10-30 | 2014-02-26 | 奇瑞汽车股份有限公司 | Motor-vehicle sound-device monitoring device and method |
| CN103607686B (en) * | 2013-10-30 | 2017-05-10 | 奇瑞汽车股份有限公司 | Motor-vehicle sound-device monitoring device and method |
| CN106683364A (en) * | 2016-11-25 | 2017-05-17 | 华京君 | Apparatus for testing endurance of blaze alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20171009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |