CN207304925U - A kind of parametric loudspeaker and performance testing device - Google Patents
A kind of parametric loudspeaker and performance testing device Download PDFInfo
- Publication number
- CN207304925U CN207304925U CN201721037779.XU CN201721037779U CN207304925U CN 207304925 U CN207304925 U CN 207304925U CN 201721037779 U CN201721037779 U CN 201721037779U CN 207304925 U CN207304925 U CN 207304925U
- Authority
- CN
- China
- Prior art keywords
- loudspeaker
- power supply
- data collecting
- collecting card
- sound level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model belongs to field of automobile, discloses a kind of parametric loudspeaker and performance testing device, and described device includes：Main control unit, interface unit and anechoic chamber, wherein, the main control unit includes display and connects the microcontroller of the display；The interface unit includes data collecting card and programmable power supply；Loudspeaker and sound level meter to be measured are installed in the anechoic chamber, the sound level meter connects the data collecting card, the loudspeaker to be measured connect the programmable power supply, the programmable power supply provides a variety of different operating voltages according to the adjusting of the microcontroller to the loudspeaker to be measured, acoustical signal is converted to electric signal and is sent to data collecting card by the sound level meter, and the microcontroller receives the data such as the sound level that data collecting card collects, fundamental frequency, electric current and carries out judging whether to meet pre-set level.The test device of the utility model, simple and practical in structure, examination criteria is stringent, other loudspeaker producers and vehicle factor, and for the performance of loudspeaker, quality, which has, clearly to be instructed and index effect.
Description
Technical field
The utility model belongs to field of automobile, and in particular to a kind of parametric loudspeaker and performance testing device.
Background technology
Loudspeaker are one of breaking pieces indispensable on automobile, and loudspeaker are warned to pedestrian, link up and protect with other vehicles
Card safe driving of vehicle etc. all plays an important role.But tucket can also cause one for daily life
Fixed influence, can produce substantial amounts of noise when serious.
Therefore, while loudspeaker basic function is ensured, there is provided the euphony that people are willing to accept, reduces loudspeaker and make an uproar
Sound, this parametric loudspeaker and device for testing functions for just making effectively to stablize are particularly important.
Utility model content
The technical problems to be solved in the utility model is, overcome lack specialty in the prior art can be to parametric loudspeaker
And the test device that performance is strictly tested.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows：
A kind of parametric loudspeaker and performance testing device, described device include：Main control unit, interface unit and anechoic chamber, its
In,
The main control unit, connects the interface unit, and the main control unit includes display and connects the display
Microcontroller；
The interface unit, connects the main control unit and anechoic chamber respectively, and the interface unit includes data collecting card
And programmable power supply, the data collecting card and programmable power supply connect the microcontroller respectively；
The anechoic chamber, connects the interface unit, and loudspeaker and sound level meter to be measured, the sound are provided with the anechoic chamber
Level meter connects the data collecting card, and the loudspeaker to be measured connect the programmable power supply, and the programmable power supply is according to the micro-control
The adjusting of device processed provides a variety of different operating voltages to the loudspeaker to be measured, and acoustical signal is converted to electric signal by the sound level meter
And it is sent to data collecting card.
Further, the voltage regulation limits of the programmable power supply are 9V~16V.
Further, the interface unit further includes alarm, connects the microcontroller, the microcontroller is according to number
The parametric loudspeaker fed back to according to capture card is compared with pre-set level, when it is not inconsistent standardization, to the alarm one
Alarm command.
Further, galvanometer is also equipped with the anechoic chamber, the galvanometer connects the line where loudspeaker to be measured
Road, the galvanometer are also connected with the data collecting card, and the current data when loudspeaker to be measured of collection are worked is sent to data
Capture card.
Further, the sound level meter includes microphone, and the microphone is arranged in parallel with loudspeaker to be measured, the microphone
It is 199cm~201cm with loudspeaker spacing to be measured.
Further, the sound level is calculated as level-one sound level meter.
Further, the voltage regulation stall of the programmable power supply includes：9V、10.8V、11.4V、 12V、12.6V、
13.0V、13.2V、13.8V、14.4V、16V。
Further, the microcontroller controls the programmable power supply to power 3 seconds under 9V voltages successively, powers off 10 seconds,
Power 3 seconds under the voltage of 10.8V and 11.4V, power off 5 seconds, 12V, 12.6V, 13.0V, 13.2V, 13.8V, 14.4V,
Power 3 seconds, power off 10 seconds successively respectively under the operating voltage of 16V.
Parametric loudspeaker and performance testing device provided by the utility model, can join the loudspeaker performance under different voltages
Number, including sound level, fundamental frequency, electric current, and the tone color problem such as trill or noise are tested, to the voltage condition that actually occurs and
Current conditions propose more comprehensively careful detection, have guiding significance for other loudspeaker producers.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, describe below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other attached drawings can also be obtained according to these attached drawings.
The parametric loudspeaker and the schematic diagram of performance testing device that Fig. 1 is provided by the utility model embodiment.
Fig. 2 carries out loudspeaker test for the parametric loudspeaker and performance testing device provided using the utility model embodiment
Current work schematic diagram.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected scope.
The utility model is described further with reference to the accompanying drawings and embodiments.
With reference to shown in Fig. 1, a kind of parametric loudspeaker and performance testing device disclosed in the utility model embodiment, including：
Main control unit, interface unit and anechoic chamber, wherein,
The main control unit, connects the data acquisition unit, and the main control unit includes display and connects the display
The microcontroller of device, the microcontroller receive the data such as the sound level sent from interface unit, fundamental frequency, electric current and are sentenced
Disconnected whether to meet pre-set level, display shows the sound level for through the processed related data of microcontroller, including loudspeaker to be measured, base
Frequently, size of current etc..The microcontroller can be microcontroller or the microcomputer with similar data processing function.
The interface unit, connects the main control unit and anechoic chamber respectively, and the interface unit includes data collecting card
And programmable power supply, the data collecting card and programmable power supply connect the microcontroller respectively；The interface unit further includes report
Alert device, connects the microcontroller, the microcontroller according to the parametric loudspeaker that data collecting card is fed back to and pre-set level into
Row compares, when it is not inconsistent standardization, to described one alarm command of alarm.Pre-set level includes sound level, fundamental frequency and electric current
Deng.
The anechoic chamber, connects the interface unit, loudspeaker and sound level meter to be measured is provided with the anechoic chamber, in noise reduction
Acoustical testing is completed in room, and the sound level meter connects the data collecting card, and the loudspeaker to be measured connect the programmable power supply, described
Programmable power supply provides a variety of different operating voltages, the sound level meter according to the adjusting of the microcontroller to the loudspeaker to be measured
Acoustical signal is converted into electric signal and is sent to data collecting card.Galvanometer, the electric current are also equipped with the anechoic chamber
Meter connects the circuit where loudspeaker to be measured, and the galvanometer is also connected with the data collecting card, and the loudspeaker to be measured of collection are worked
When current data be sent to data collecting card.
This test device and corresponding test method are primarily directed to 12V automobile electrical network systems, optimal shape
State, the power supply of automobile should be 12V.Therefore the frequency of loudspeaker, current requirements etc. belong to the base attribute of loudspeaker, are all tested with 12V
Subject to condition.But situations such as combining operation principle and the discharge and recharge of storage battery, 12V automobile electricals network system requires electric appliance zero
The design work scope of part is 9v to 16v.Therefore, electrical appliance will possess the ability to work in the range of 9V~16V.Therefore set
The voltage regulation limits for putting the programmable power supply are 9V~16V, and the voltage of the programmable power supply can be adjusted by microcontroller
Section.More specifically, the voltage regulation stall of the programmable power supply includes：9V、10.8V、 11.4V、12V、12.6V、
13.0V、13.2V、13.8V、14.4V、16V.Since storage battery is in loudspeaker power supply process, for perfect condition 12V, usually store
Battery normal power supply voltage is 12.5~13.2V, 13V is preferably chosen in the present embodiment, voltage is continuous when accumulator electric-quantity is insufficient
Reduce, common voltage chooses 11.4V.When by generator powered, supply voltage is between 13.5~14.4V, the present embodiment
In preferred choose 13.8V.In order to more accurately measurement different conditions under loudspeaker sound level, so choose 9V, 11.4V, 13.0V,
It is the sound level for the loudspeaker that must be surveyed under the conditions of 13.8V.
The operation principle of sound level meter is：Electric signal is converted tones into by microphone, then by preamplifier transforming impedance,
Microphone is set to be matched with attenuator.Amplifier is added to weighting network by signal is exported, and spectrum overlapping (or external filter is carried out to signal
Ripple device), certain amplitude is then may amplify the signal to through attenuator and amplifier again, it is (or outer by electricity to be sent to rms detector
Equal a record instrument), the numerical value of noise sound level is provided on indicating meter.The sound level meter includes microphone, and microphone function is exactly
Sound pressure signal is changed into voltage signal, the microphone is arranged in parallel with loudspeaker to be measured, between the microphone and loudspeaker to be measured
Away from for 199cm~201cm, being preferably 200cm.
Further, in the present embodiment, the sound level is calculated as level-one sound level meter, and execution standard is detected according to level-one, adopted
Tested with A weighteds.
Below relevant parameter measurement is carried out to be described in detail by the parametric loudspeaker and performance testing device of the utility model
Test method.
(1) test condition：
The primary condition of test is identical with the requirement of GB15742, and environment temperature is room temperature, humidity 45%~70%.
Test carries out in anechoic room, and exemplar (loudspeaker to be measured) is installed to test after need to being fixed on the frame of regulation requirement
On rack, rack weight demands are more than 30kg, use height (120 ± 5) cm.Microphone be installed on apart from noise outlet (200 ±
1) at cm.Sound level is calculated as level-one sound level meter, is tested using A weighteds.
(2) product is installed
According to cycle tests shown in Fig. 1, is set, programmable power supply is loaded powers to loudspeaker, sound level in the loudspeaker course of work
Measurement examination loudspeaker sound pressure level, while galvanometer connects backtracking by circuit and collects data such as electric current when loudspeaker work, and by institute
There are data to be sent into data collecting card.Data collecting card obtains the number needed by the signal collected by the analysis of time and frequency zone
According to feeding back to microcontroller.Microcontroller according to result can feed horn parameter whether meet all indexs, all data are all remembered
Record is in main control unit part；If parameter is unsatisfactory for default condition requirement, alarm signal is sent by alarm.
(3) test process
The testing process of whole device is as shown in table 1 below
1 testing process of table
In addition to the requirement for meeting GB15742, the loudspeaker performance parameter that this test method is primarily upon includes sound level, base
Frequently, electric current, and the tone color problem such as trill or noise.
Testing process is：
Voltage is provided by testing stand, measures 9V, 11.4V, 13.0V respectively, the sound level of loudspeaker under the conditions of 13.8V.
Test the fundamental frequency and electric current of loudspeaker under 12V voltages.
Since 10.8V, start to be raised to 14.4V using 0.6V as ladder, every time ring 3s, interval 5s, and increase 9V and
16V, the tone color of subjective assessment loudspeaker.Wherein, set and ring 3s, interval 5s is also to combine the loudspeaker that development Experience determines to work again not
The time of impact effect can be overheated.
Test report template is as shown in table 2 below
2 test report template of table
Corresponding data are recorded after test, tone color and functional test part are mainly by artificial subjective assessment.
(4) specific test request
Sound level：
9.0V sound level：100.0dB~118.0dB
11.4V sound levels：105.0dB~118.0dB
13.0V sound levels：107.0dB~118.0dB
13.8V sound levels：107.0dB~118.0dB
Electric current：When starting test to loudspeaker power supply every time, the electric current of loudspeaker substantially changes as shown in Figure 2.
In the self-oscillating of loudspeaker, electric current has the high point of a transient state.Wherein maximum we be calculated as Id. by one
Loudspeaker electric current can reach a relatively steady state after the section time.The maximum of loudspeaker is calculated as Im, virtual value meter after stabilization
For Ieff.Transient state high point current value cannot be excessive, otherwise has greater impact to the circuit of vehicle.The current effective value of stable state and most
High level also should ensure that the power of loudspeaker cannot be too big.Specific requirement is：Ieff≤6A；Im≤10A；Id≤15A.
Tone color：
Subjective judgement of the tone color evaluation of loudspeaker mainly by people.The loudness of loudspeaker is paid close attention in the judgement of tone color, sharpness,
Roughness and whether melodious etc..It is artificial to feel to be subjected to this test then qualification, artificially feel unacceptable, need to look for people to reconsider
It can determine.
Compared with prior art, using the test device of the utility model, a kind of new cycle tests is carried out, can be covered
The various situations of vehicle 12V power-supply systems appearance simultaneously carry out system effectively to buffer and protect, for the performance of loudspeaker, quality
Have and clearly instruct and index effect.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (8)
1. a kind of parametric loudspeaker and performance testing device, it is characterised in that described device includes：Main control unit, interface unit and
Anechoic chamber, wherein,
The main control unit, connects the interface unit, and the main control unit includes display and connects the micro-control of the display
Device processed；
The interface unit, connects the main control unit and anechoic chamber respectively, and the interface unit includes data collecting card and journey
Power supply is controlled, the data collecting card and programmable power supply connect the microcontroller respectively；
The anechoic chamber, connects the interface unit, and loudspeaker and sound level meter to be measured, the sound level meter are provided with the anechoic chamber
The data collecting card is connected, the loudspeaker to be measured connect the programmable power supply, and the programmable power supply is according to the microcontroller
Adjusting the loudspeaker to be measured are provided with a variety of different operating voltages, it is concurrent that acoustical signal is converted to electric signal by the sound level meter
Give data collecting card.
2. parametric loudspeaker according to claim 1 and performance testing device, it is characterised in that the voltage of the programmable power supply
Adjustable range is 9V~16V.
3. parametric loudspeaker according to claim 2 and performance testing device, it is characterised in that the interface unit further includes
Alarm, connects the microcontroller, the parametric loudspeaker and pre-set level that the microcontroller is fed back to according to data collecting card
It is compared, when it does not meet preset standard, to described one alarm command of alarm.
4. parametric loudspeaker according to claim 3 and performance testing device, it is characterised in that also pacify in the anechoic chamber
Equipped with galvanometer, the galvanometer connects the circuit where loudspeaker to be measured, and the galvanometer is also connected with the data collecting card, will
Current data during the loudspeaker to be measured work of collection is sent to data collecting card.
5. parametric loudspeaker according to claim 2 and performance testing device, it is characterised in that the voltage of the programmable power supply
Regulation stall includes：9V、10.8V、11.4V、12V、12.6V、13.0V、13.2V、13.8V、14.4V、16V.
6. parametric loudspeaker according to claim 5 and performance testing device, it is characterised in that the microcontroller is controlled successively
Make the programmable power supply to power 3 seconds under 9V voltages, power off 10 seconds, power 3 seconds under the voltage of 10.8V and 11.4V, power-off 5
Second, power 3 seconds successively respectively under the operating voltage of 12V, 12.6V, 13.0V, 13.2V, 13.8V, 14.4V, 16V, power-off 10
Second.
7. parametric loudspeaker according to claim 1 and performance testing device, it is characterised in that the sound level meter includes transaudient
Device, the microphone are arranged in parallel with loudspeaker to be measured, and the microphone and loudspeaker spacing to be measured are 199cm~201cm.
8. parametric loudspeaker according to claim 7 and performance testing device, it is characterised in that the sound level is calculated as level-one sound
Level meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721037779.XU CN207304925U (en) | 2017-08-18 | 2017-08-18 | A kind of parametric loudspeaker and performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721037779.XU CN207304925U (en) | 2017-08-18 | 2017-08-18 | A kind of parametric loudspeaker and performance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304925U true CN207304925U (en) | 2018-05-01 |
Family
ID=62444894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721037779.XU Active CN207304925U (en) | 2017-08-18 | 2017-08-18 | A kind of parametric loudspeaker and performance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207304925U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378513A (en) * | 2020-11-13 | 2021-02-19 | 陕西师范大学 | Detection system and method of sound level meter |
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
-
2017
- 2017-08-18 CN CN201721037779.XU patent/CN207304925U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378513A (en) * | 2020-11-13 | 2021-02-19 | 陕西师范大学 | Detection system and method of sound level meter |
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
| CN115855237B (en) * | 2023-01-03 | 2023-06-27 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207304925U (en) | A kind of parametric loudspeaker and performance testing device | |
| CA2381032A1 (en) | Assessing a parameter of cells in the batteries of uninterruptable power supplies | |
| CN108445367A (en) | Portable partial discharge detector based on ultrasound | |
| CN105157815B (en) | A kind of application method of MEMS microphone for multi-direction test high ferro noise | |
| CN205211130U (en) | Take a seat and detect sensor, sit reminding device and intelligent thing to sit on for a long time | |
| CN105469554A (en) | Seating detection sensor, sedentariness prompting device and intelligent seat | |
| CN104857670A (en) | Running machine with accessory device utilizing brain waves to real-time monitor exercising state | |
| CN206020564U (en) | A kind of detection of the laptop adapter with auto-alarm function instrument | |
| CN104635104B (en) | A kind of breaking short-circuit ATE of camera module and its method of testing | |
| CN115445081A (en) | Electric field treatment monitoring system and method | |
| CN209590240U (en) | A kind of electronic product | |
| CN206007247U (en) | A kind of bone conduction feedback device based on the anti-fatigue monitoring of brain wave | |
| CN110196097A (en) | Substation's noise detection apparatus based on MEMS microphone, method and system | |
| CN203616401U (en) | Online detection device used for electric reactor | |
| CN206236064U (en) | A kind of computer glitch detection means | |
| CN104597334A (en) | Online reactor detection device | |
| CN208505368U (en) | A kind of indoor environment monitoring device | |
| CN217181044U (en) | Near-electricity sensing device | |
| CN106885954A (en) | The detection means of buzzer | |
| CN217112604U (en) | Power amplifier's test system | |
| CN110099350A (en) | The test method of power amplifier | |
| CN205374622U (en) | Detection apparatus for buzzer | |
| CN212394924U (en) | Portable pure tone hearing test screening equipment | |
| CN205642605U (en) | Multi -functional precision sound level meter | |
| CN212255505U (en) | Rifle detection device charges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |