CN203825083U - Power testing device for D-type power amplifying loudspeaker - Google Patents
Power testing device for D-type power amplifying loudspeaker Download PDFInfo
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- CN203825083U CN203825083U CN201320764858.6U CN201320764858U CN203825083U CN 203825083 U CN203825083 U CN 203825083U CN 201320764858 U CN201320764858 U CN 201320764858U CN 203825083 U CN203825083 U CN 203825083U
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Abstract
The utility model discloses a power testing device for a D-type power amplifying loudspeaker, and the device is used for testing the differential loudspeaker power of equipment. The device comprises a testing fixture and an oscilloscope, which are connected with each other. The testing fixture comprises an adapter plate which is provided with a test port. The test port is connected with a differential loudspeaker test point in test equipment. The device provided by the utility model saves a process of welding a low-pass filter manually, can meet the requirements of production of a complete machine for test demands, and is suitable for batch production.
Description
Technical field
The utility model relates to a kind of test device for mobile phone, relates in particular to a kind of D class power amplifier loudspeaker device for testing power.
Background technology
In mobile phone scheme, loudspeaker power amplifier is for raising the efficiency, generally adopt D class power amplifier, and D class power amplifier belongs to numeric type, be output as square wave, the test source of sound of loudspeaker is generally 1KHz/0db sine wave, directly test can not correctly test out the power of loudspeaker, and need to reduce actual source of sound through low-pass filtering.Current method of testing is generally PCBA test, needs the test of slip-stick artist oneself welding low-pass filter, can only meet like this research and development test, is not suitable for factory's volume production test, neither automatic test, so cannot meet the complete machine production requirement of testing requirement.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of D class power amplifier loudspeaker device for testing power, to solve deficiency of the prior art.
In order to achieve the above object, the purpose of this utility model is achieved through the following technical solutions:
A kind of D class power amplifier loudspeaker device for testing power, for testing apparatus difference loudspeaker power, wherein, comprise interconnective test fixture and oscillograph, described test fixture comprises card extender, described card extender is provided with test port, and described test port connects the difference loudspeaker test point in described testing apparatus.
Above-mentioned D class power amplifier loudspeaker device for testing power, wherein, described card extender comprises the first electric capacity, the second electric capacity, the first inductance and the second inductance, and described the first electric capacity and described the first inductance form the first low-pass filtering, and described the second electric capacity and described the second inductance form the second low-pass filtering; Described the first low-pass filtering and described the second low-pass filtering are converted into the square wave of D class power amplifier after the square wave of AB class by described oscilloscope display; Corresponding second test port of entrance of corresponding first test port of entrance of described the first low-pass filtering and described the second low-pass filtering, described the first test port is connected with the difference loudspeaker test point of described testing apparatus respectively with described the second test port.
Above-mentioned D class power amplifier loudspeaker device for testing power, wherein, described difference loudspeaker test point and described test port can be connected or be passed through wired connection by thimble.
Above-mentioned D class power amplifier loudspeaker device for testing power, wherein, described difference loudspeaker test point is arranged on the mainboard of described testing apparatus or on FPC plate.
Above-mentioned D class power amplifier loudspeaker device for testing power, wherein, described testing apparatus comprises mobile phone and panel computer.
Compared with the prior art, the beneficial effects of the utility model are:
Save artificial welding low-pass filter, can meet the complete machine production requirement of testing requirement, be applicable to volume production.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model D class power amplifier loudspeaker device for testing power;
Fig. 2 is the schematic flow sheet of the method for testing of the utility model D class power amplifier loudspeaker device for testing power;
Fig. 3 a, Fig. 3 b are respectively oscillographic two kinds of output waveforms of the utility model D class power amplifier loudspeaker device for testing power.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the utility model can combine mutually.
With reference to Fig. 1, the utility model D class power amplifier loudspeaker device for testing power is for the difference loudspeaker power on testing apparatus mainboard, comprise interconnective test fixture and oscillograph, test fixture comprises card extender, card extender is provided with test port, the difference loudspeaker test point in test port connecting test equipment.
Difference loudspeaker test point and test port can be connected or by wired connection, connected mode is determined according to actual application environment by thimble, and in addition, difference loudspeaker test point can be arranged on the mainboard of testing apparatus or on FPC plate.
In preferred embodiment of the present utility model, card extender comprises the first capacitor C 1, the second capacitor C 2, the first inductance L 1 and the second inductance L 2, the first capacitor C 1 and the first inductance L 1 form the first low-pass filtering, the second capacitor C 2 and the second inductance L 2 form the second low-pass filtering, the first low-pass filtering and the second low-pass filtering are passed through oscilloscope display after the square wave of D class power amplifier being converted into the square wave of AB class, corresponding first test port of entrance of the first low-pass filtering and corresponding second test port of entrance of the second low-pass filtering, the first test port and the second test port respectively with the difference loudspeaker test point TP1 of testing apparatus, TP2 connects.Continuation is with reference to Fig. 1, different according to the design of testing apparatus, and determine according to mainboard situation and loudspeaker position the position that TP1 and TP2 select, can, on mainboard, also can, on FPC, be placed on complete machine and take off the place that battery can be seen, be convenient to system test, TP3 makes two planks form path.
Preferably, testing apparatus can, for mobile phone and panel computer etc., be not limited to the said equipment certainly.
With reference to Fig. 2, method of testing is: in the test formula of testing apparatus, be made with the test item of loudspeaker (speaker), tester only need click and open speaker test item, and mobile phone just can move test procedure automatically.By voice-frequency channel, to speaker, send out a 0db, the audio file of 1KHz, in this system, comprise a standard sine wave audio file, this audio file is the sine wave of standard, and after D class audio frequency power amplifier, can become square wave, through card extender, be converted to sine wave again, by external oscillograph, observe the sine waveform situation after conversion.With reference to Fig. 3 a and Fig. 3 b, if sine wave has been cut top, illustrate that power exceeds standard, can directly be judged to failure (fail), if sine waveform is intact, read the RMS value that oscillograph is surveyed, and be input to the testing apparatuss such as mobile phone, mobile phone, by calculating, draws the power of survey, and tester can judge whether by test according to power standard.Wherein, the corresponding relation of RMS value and power is as follows, in test procedure, can automatically calculate:
| Power | Effective voltage (RMS) |
| 0.3W | 1.55v |
| 0.5W | 2v |
| 0.65W | 2.28v |
| 0.7W | 2.37v |
| 0.8W | 2.53v |
| 1W | 2.83v |
In the situation that sine wave is complete, can calculate power by RMS value, as shown in Figure 3 b, can calculate power is 450mW, thus for the loudspeaker (speaker) of 1W can debug add high-power.
The utility model adopts automatic test, the standard audio of design output 1KHz in test formula, in addition can PCB at SPKP, on SPKN, stay test point, the loudspeaker power automatic test that completes PCBA or complete machine, carries out effective management and control to Mobile phone horn quality.
Above specific embodiment of the utility model be have been described in detail, but the utility model is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present utility model.Therefore,, not departing from the equalization conversion of having done under spirit and scope of the present utility model and revising, all should be encompassed in scope of the present utility model.
Claims (5)
1. a D class power amplifier loudspeaker device for testing power, for testing apparatus difference loudspeaker power, it is characterized in that, comprise interconnective test fixture and oscillograph, described test fixture comprises card extender, described card extender is provided with test port, and described test port connects the difference loudspeaker test point in described testing apparatus.
2. D class power amplifier loudspeaker device for testing power according to claim 1, it is characterized in that, described card extender comprises the first electric capacity, the second electric capacity, the first inductance and the second inductance, described the first electric capacity and described the first inductance form the first low-pass filtering, and described the second electric capacity and described the second inductance form the second low-pass filtering; Described the first low-pass filtering and described the second low-pass filtering are converted into the square wave of D class power amplifier after the square wave of AB class by described oscilloscope display; Corresponding second test port of entrance of corresponding first test port of entrance of described the first low-pass filtering and described the second low-pass filtering, described the first test port is connected with the difference loudspeaker test point of described testing apparatus respectively with described the second test port.
3. according to D class power amplifier loudspeaker device for testing power described in claim 1 or 2, it is characterized in that, described difference loudspeaker test point is connected by thimble with described test port or passes through wired connection.
4. D class power amplifier loudspeaker device for testing power according to claim 1, is characterized in that, described difference loudspeaker test point is arranged on the mainboard of described testing apparatus or on FPC plate.
5. D class power amplifier loudspeaker device for testing power according to claim 1, is characterized in that, described testing apparatus comprises mobile phone and panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764858.6U CN203825083U (en) | 2013-11-27 | 2013-11-27 | Power testing device for D-type power amplifying loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764858.6U CN203825083U (en) | 2013-11-27 | 2013-11-27 | Power testing device for D-type power amplifying loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825083U true CN203825083U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320764858.6U Expired - Fee Related CN203825083U (en) | 2013-11-27 | 2013-11-27 | Power testing device for D-type power amplifying loudspeaker |
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| CN (1) | CN203825083U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100345A (en) * | 2015-09-28 | 2015-11-25 | 东莞华贝电子科技有限公司 | Method for testing power of mobile phone receiver through analog signal |
| CN105391603A (en) * | 2015-12-17 | 2016-03-09 | 迈普通信技术股份有限公司 | A system and method for testing 10-gigabit electrical signals |
| CN107241676A (en) * | 2017-06-15 | 2017-10-10 | 南通同洲电子有限责任公司 | A kind of loudspeaker power amplifier test device |
| WO2019071527A1 (en) * | 2017-10-12 | 2019-04-18 | 深圳传音通讯有限公司 | Auxiliary apparatus for speaker test, and speaker testing apparatus |
-
2013
- 2013-11-27 CN CN201320764858.6U patent/CN203825083U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100345A (en) * | 2015-09-28 | 2015-11-25 | 东莞华贝电子科技有限公司 | Method for testing power of mobile phone receiver through analog signal |
| CN105100345B (en) * | 2015-09-28 | 2019-03-26 | 东莞华贝电子科技有限公司 | A method of with analog signal come testing mobile phone earpiece power |
| CN105391603A (en) * | 2015-12-17 | 2016-03-09 | 迈普通信技术股份有限公司 | A system and method for testing 10-gigabit electrical signals |
| CN105391603B (en) * | 2015-12-17 | 2019-06-21 | 迈普通信技术股份有限公司 | A kind of system and method for testing 10,000,000,000 electric signals |
| CN107241676A (en) * | 2017-06-15 | 2017-10-10 | 南通同洲电子有限责任公司 | A kind of loudspeaker power amplifier test device |
| WO2019071527A1 (en) * | 2017-10-12 | 2019-04-18 | 深圳传音通讯有限公司 | Auxiliary apparatus for speaker test, and speaker testing apparatus |
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| Date | Code | Title | Description |
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| 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: 20140910 Termination date: 20181127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |