CN206835379U - A kind of audio amplifier air leak test device - Google Patents
A kind of audio amplifier air leak test device Download PDFInfo
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- CN206835379U CN206835379U CN201720728848.5U CN201720728848U CN206835379U CN 206835379 U CN206835379 U CN 206835379U CN 201720728848 U CN201720728848 U CN 201720728848U CN 206835379 U CN206835379 U CN 206835379U
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- air
- audio amplifier
- pipeline
- test device
- leak test
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Abstract
The utility model discloses a kind of audio amplifier air leak test device, including control mainboard, air machinery, pressure-regulating valve, magnetic valve, pressure sensor, air flow sensor；The control mainboard is electrically connected with magnetic valve, pressure sensor, air flow sensor respectively；The pressure-regulating valve air inlet is connected through the first pipeline with air machinery, and gas outlet is connected through second pipe with magnetic valve air inlet；The air of the electromagnetism valve air gate respectively enters air flow sensor air inlet, pressure sensor through the 3rd pipeline；The pipeline of air flow sensor gas outlet the 4th is connected with audio amplifier.The utility model detection precision is high, detection efficiency is high, is advantageous to factory's mass production.
Description
Technical field
It the utility model is related to speaker technology field, more particularly to a kind of audio amplifier air leak test device.
Background technology
In audio amplifier industry, tonequality is an important Testing index, good for designing, but is produced in process of factory production
Raw tonequality is bad, mainly including following two aspects：1) electronic component performance is bad, causes the frequency of sound, amplitude etc.
It is deteriorated；2) loudspeaker box structure leaks out, caused both poor sound quality.The purpose of sound box is primarily to prevent that the diaphragm of loudspeaker is positive
Loop is directly formed with the acoustic signals of reverse side, causing the high intermediate frequency sound of only wavelength very little can propagate from, and other
Voice signal be applied and balance out.
In process of factory production, sound quality problem caused by electronic component typically is detected with phonetic analysis instrument, still
When being leaked out for audio amplifier, audio amplifier sound quality problem when can only detect seriously to leak out, accuracy of detection is high.
Tonequality of leaking out at this stage inspection can only largely be listened by the personnel of specialty with ear, inspected by random samples, be unfavorable for work
Factory's mass production, influences quality.
In summary, the audio amplifier air leak test device, in practice in the presence of it is inconvenient the problem of, it is therefore necessary to changed
Enter.
Utility model content
The purpose of this utility model is to provide a kind of audio amplifier air leak test device, has higher detection precision and detection to imitate
Rate, be advantageous to the mass production of factory.
To achieve the above object, using following technical scheme：
A kind of audio amplifier air leak test device, including control mainboard, air machinery, pressure-regulating valve, magnetic valve, pressure sensing
Device, air flow sensor；The control mainboard is electrically connected with magnetic valve, pressure sensor, air flow sensor respectively；
The pressure-regulating valve air inlet is connected through the first pipeline with air machinery, and gas outlet connects through second pipe and magnetic valve air inlet
Connect；The air of the electromagnetism valve air gate respectively enters air flow sensor air inlet, pressure sensor through the 3rd pipeline；Institute
The pipeline of air flow sensor gas outlet the 4th is stated to be connected with audio amplifier.
It is preferred that the control mainboard includes microcontroller, relay I/O control circuitry, AD sample circuits, RS232 communications
Mouthful；The microcontroller is electrically connected with relay I/O control circuitry, AD sample circuits, RS232 ports respectively；The AD is adopted
Sample circuit is electrically connected with pressure sensor, air flow sensor respectively；The relay I/O control circuitry and magnetic valve electricity
Property connection.
It is preferred that the detection means also includes the man-machine interface touch screen being electrically connected with RS232 ports.
It is preferred that the detection means also includes indicator lamp, the shift knob being electrically connected with relay I/O control circuitry.
It is preferred that the 3rd pipeline, pressure sensor, air flow sensor connect through three-way connection；The threeway
Joint includes an air inlet and two gas outlets, and air inlet is connected with the 3rd pipeline, two gas outlets respectively with pressure sensor, air
Flow sensor connects.
It is preferred that the microcontroller model STM32F103RE.
It is preferred that the air machinery is air compressor.
Using such scheme, the beneficial effects of the utility model are：
1) apparatus structure is simple, and detection is easy to operate；
2) detection efficiency is high：It can just be completed using the whole detection process of the detection means is interior in several seconds, be advantageous to factory
Mass production；
3) it is high to detect precision：Detected using the detection means by way of flow difference complete within a short period of time
Into atmospheric pressure, temperature and error caused by source of the gas shakiness can be eliminated, so as to realize the metastable judgement of essence.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model；
Fig. 2 is principle electrical circuit figure of the present utility model；
Fig. 3 is microcontroller circuit figure of the present utility model；
Fig. 4 is RS232 ports circuit diagram of the present utility model；
Fig. 5 is relay I/O control circuitry figure of the present utility model；
Fig. 6 is AD sample circuits figure of the present utility model；
Wherein, accompanying drawing identifier declaration：
1-air machinery, 2-pressure-regulating valve,
3-magnetic valve, 4-pressure sensor,
5-air flow sensor, 6-audio amplifier,
7-three-way connection, the 8-the first pipeline,
9-second pipe, the 10-the three pipeline,
11-the four pipeline, 12-control mainboard,
13-man-machine interface touch screen, 14-shift knob,
15-indicator lamp, 121-RS232 ports,
122-relay I/O control circuitry, 123-AD sample circuits.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Referring to figs. 1 to shown in 6, a kind of audio amplifier air leak test device, including control mainboard 12, air machinery 1, pressure are adjusted
Valve 2, magnetic valve 3, pressure sensor 4, air mass flow sense 5 devices；The control mainboard 12 respectively with magnetic valve 3, pressure sensing
Device 4, air flow sensor 5 are electrically connected with；The air inlet of pressure-regulating valve 2 is connected through the first pipeline 8 with air machinery 1,
Gas outlet is connected through second pipe 9 with the air inlet of magnetic valve 3；The air of the gas outlet of magnetic valve 3 is distinguished through the 3rd pipeline 10
The air inlet of air inlet flow sensor 5, pressure sensor 4；The pipeline 11 of 5 gas outlet of air flow sensor the 4th with
Audio amplifier 6 connects.
Wherein, the control mainboard 12 includes microcontroller, relay I/O control circuitry (relay input and output control electricity
Road) 122, AD sample circuits 123, RS232 ports 121；The microcontroller respectively with relay I/O control circuitry 122, AD
Sample circuit 123, RS232 ports 121 are electrically connected with；The AD sample circuits 123 respectively with pressure sensor 4, air stream
Quantity sensor 5 is electrically connected with；The relay I/O control circuitry 122 is electrically connected with magnetic valve 3.The detection means also includes
The man-machine interface touch screen 13 being electrically connected with RS232 ports 121.The detection means also includes controlling electricity with relay IO
Indicator lamp 15, the shift knob 14 of the electric connection of road 122.3rd pipeline 10, pressure sensor 4, air flow sensor 5
Connected through three-way connection 7；The three-way connection 7 includes an air inlet and two gas outlets, and air inlet is connected with the 3rd pipeline 10, and two
Gas outlet is connected with pressure sensor 4, air flow sensor 5 respectively.The microcontroller model STM32F103RE.Institute
It is air compressor to state air machinery 1.
Utility model works principle：
The unlatching or stopping of detection means are controlled by shift knob 14, detection ginseng is set by man-machine interface touch screen 13
Number, display testing result etc..In detection process, if finding, the show value of pressure sensor 4 exceeds pressure predetermined value (according to sound
The type of case 6 and customer requirement determine) ± 10% scope, it is necessary to manually be adjusted pressure-regulating valve 2 to pressure predetermined value
± 10% in the range of.
Pressure-regulating valve 2 is the precision pressure regulating valve of the model 10222 of Fairchild companies of U.S. production, is used for
Required pressure during regulation detection；Magnetic valve 3 is used as gas source switch during detection, and pressure sensor is with 4 in detection process
In pressure, air flow sensor 5 be used for detection process in air mass flow.
The step of detecting audio amplifier Air Leakage using the detection means is as follows：
(1) flow difference scope is set in detection means according to the type of audio amplifier 6 and customer requirement；
(2) when the 4th pipeline 11 is not connected with audio amplifier 6, the outlet side of the 4th pipeline 11 is hanging, and magnetic valve 3 is powered；Source of the gas
The air of equipment 1 enters detection means；When pressure sensor 4 detect numerical value in the range of ± the 10% of pressure predetermined value, and
After air mass flow stabilization in detection means, the data L1 of detection device records air flow sensor；
(3) when the 4th pipeline 11 is connected to the test of audio amplifier 6 mouth, (to detect what is reserved, after the completion of detection, the test mouth is by group
Dress seals), magnetic valve 3 is powered；The air of air machinery 1 enters detection means, when the numerical value that pressure sensor 4 detects is in pressure
In the range of ± the 10% of predetermined value, and after the air mass flow stabilization in detection means, detection device records air flow sensor
Data L2；
(4) detection means calculates the air mass flow difference DELTA L=L1-L2 detected twice automatically；
(5) detection means is according to the flow set in the air mass flow difference DELTA L=L1-L2 and detection means detected twice
Difference range is compared (according to the data setting of standard items this detection process of same type audio amplifier 6), if the flow difference
Then audio amplifier 6 detects qualified Δ L in the range of the flow difference of setting, and otherwise audio amplifier 6 detects unqualified.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (7)
1. a kind of audio amplifier air leak test device, it is characterised in that including control mainboard, air machinery, pressure-regulating valve, electromagnetism
Valve, pressure sensor, air flow sensor；The control mainboard senses with magnetic valve, pressure sensor, air mass flow respectively
Device is electrically connected with；The pressure-regulating valve air inlet is connected through the first pipeline with air machinery, and gas outlet is through second pipe and electricity
Magnet valve air inlet connects；The air of the electromagnetism valve air gate through the 3rd pipeline respectively enter air flow sensor air inlet,
Pressure sensor；The pipeline of air flow sensor gas outlet the 4th is connected with audio amplifier.
2. audio amplifier air leak test device according to claim 1, it is characterised in that the control mainboard includes microcontroller
Device, relay I/O control circuitry, AD sample circuits, RS232 ports；The microcontroller controls electricity with relay IO respectively
Road, AD sample circuits, RS232 ports are electrically connected with；The AD sample circuits sense with pressure sensor, air mass flow respectively
Device is electrically connected with；The relay I/O control circuitry is electrically connected with magnetic valve.
3. audio amplifier air leak test device according to claim 2, it is characterised in that the detection means also include with
The man-machine interface touch screen that RS232 ports are electrically connected with.
4. audio amplifier air leak test device according to claim 2, it is characterised in that the detection means also includes and relay
Indicator lamp, the shift knob of device I/O control circuitry electric connection.
5. audio amplifier air leak test device according to claim 1, it is characterised in that the 3rd pipeline, pressure sensor,
Air flow sensor connects through three-way connection；The three-way connection includes an air inlet and two gas outlets, air inlet and the 3rd
Pipeline is connected, and two gas outlets are connected with pressure sensor, air flow sensor respectively.
6. audio amplifier air leak test device according to claim 2, it is characterised in that the microcontroller model
STM32F103RE。
7. audio amplifier air leak test device according to claim 1, it is characterised in that the air machinery compresses for air
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720728848.5U CN206835379U (en) | 2017-06-22 | 2017-06-22 | A kind of audio amplifier air leak test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720728848.5U CN206835379U (en) | 2017-06-22 | 2017-06-22 | A kind of audio amplifier air leak test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206835379U true CN206835379U (en) | 2018-01-02 |
Family
ID=60776736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720728848.5U Active CN206835379U (en) | 2017-06-22 | 2017-06-22 | A kind of audio amplifier air leak test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206835379U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107105381A (en) * | 2017-06-22 | 2017-08-29 | 深圳市山海精仪科技有限公司 | A kind of audio amplifier air leak test device and detection method |
-
2017
- 2017-06-22 CN CN201720728848.5U patent/CN206835379U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107105381A (en) * | 2017-06-22 | 2017-08-29 | 深圳市山海精仪科技有限公司 | A kind of audio amplifier air leak test device and detection method |
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