CN103379419A - Audio frequency access test system - Google Patents
Audio frequency access test system Download PDFInfo
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- CN103379419A CN103379419A CN2012101114833A CN201210111483A CN103379419A CN 103379419 A CN103379419 A CN 103379419A CN 2012101114833 A CN2012101114833 A CN 2012101114833A CN 201210111483 A CN201210111483 A CN 201210111483A CN 103379419 A CN103379419 A CN 103379419A
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Abstract
The invention discloses an audio frequency access test system, which is used for testing modules containing audio access. The audio frequency access test system includes: a signal source for generating an audio signal, a filtering module, and a signal test module for testing the audio signal output by the the modules. The audio signal generated by the signal source is sent to the filtering module through an audio access of the modules, and the audio signal output by the modules is tested by the signal test module to judge to whether the audio signal output by the modules is generated by the signal source. In the audio frequency access test system provided by the invention, the state of the audio access of the modules is determined by testing whether the frequency of the input audio signal is close to the frequency of the output audio signal. Since automation test mode is utilized, test rate is greatly improved compare with the test rate of manual test, and test error is avoided, thus quality of produced module is enhanced.
Description
Technical field
The present invention relates to a kind of voice-frequency channel test macro, particularly relate to a kind of test macro that comprises the module sound intermediate frequency path of voice-frequency channel.
Background technology
The product of modularized design has been widely applied at the product of telecommunications and has been used in the design, and for the quality of the module that guarantees to dispatch from the factory, the test before module is dispatched from the factory is very important.
Yet the test of the interface of the existing module that comprises voice-frequency channel is manually to use handle or earphone, blows at input, can hear by people's ear at output by voice-frequency channel, and whether voice-frequency channel is good to come subjective judging.Adopt the manual testing owing to comprise the module of voice-frequency channel, thus cause tester's workload large, and also artificial behavioral performance is low, so also be unfavorable for the quality assurance to the audio-frequency module that dispatches from the factory.
Summary of the invention
The technical problem to be solved in the present invention is that comprise the efficient that the voice-frequency channel of the module of voice-frequency channel causes in order to overcome available technology adopting manual type test low, the insecure defective of test result, a kind of voice-frequency channel test macro is provided, changes to judge by the amplitude that detects the output end signal level whether voice-frequency channel is normal.
The present invention solves above-mentioned technical problem by following technical proposals:
The invention provides a kind of voice-frequency channel test macro, be characterized in that described voice-frequency channel test macro comprises: be used for to generate a signal generating source, a filtration module of an audio signal and for detection of a signal detection module of described filtration module output signal;
The audio signal that wherein said signal generating source generates is injected described filtration module by a voice-frequency channel of described module, and whether the signal level that described signal detection module detects described filtration module output changes.
Preferably, whether the audio signal that described signal detection module detects described module output surpasses a threshold value, if surpass described threshold value, then the audio signal of described module output is the audio signal that transfers to the described signal generating source generation of described signal detection module by described voice-frequency channel, so the voice-frequency channel conducting of described module, otherwise the voice-frequency channel of described module opens circuit.
Preferably, described threshold value is 0.6V-1V.
Preferably, described audio signal has a fixed frequency.
Preferably, described module also comprises a plurality of voice-frequency channels, described voice-frequency channel test macro also comprises the diverter switch that is serially connected with between described module and the described filtration module, wherein said diverter switch can so that any one described voice-frequency channel and described filtration module conduct.
Preferably, described voice-frequency channel test macro also comprises an amplification module that is serially connected with between described diverter switch and the described filtration module, and described amplification module is used for the audio signal of the voice-frequency channel output that conducts with described filtration module is amplified.
Preferably, described module also comprises a plurality of voice-frequency channels, described voice-frequency channel test macro also comprises diverter switch and a plurality of filtration module, wherein said voice-frequency channel and described filtration module conduct one to one, described diverter switch can so that any one described filtration module and described signal detection module conduct.
Preferably, in the every pair of voice-frequency channel and the filtration module, all be serially connected with between described voice-frequency channel and the filtration module for an amplification module that amplifies audio signal.
Preferably, described voice-frequency channel is the voice-frequency channel of voice-frequency channel, microphone and loud speaker of microphone and receiver or the voice-frequency channel of ear microphone and earphone speaker.
Preferably, described signal generating source is the audio output of a PC (personal computer) or the GPIO interface (universal input/output interface) of described module.
Preferably, described voice-frequency channel test macro also comprises a level shifting circuit that is serially connected with between described signal generating source and the described module, and described level shifting circuit is used for changing the Audio Meter of described signal generating source output.
Preferably, described signal detection module is the ADC interface (analog-to-digital conversion interface) of described module.So can effectively reduce external device, so reduced the cost that detection system is built.
Preferably, the frequency of described audio signal is in 20Hz-20KHz.
Preferably, the frequency of described audio signal is in 200Hz-1KHz.
Positive progressive effect of the present invention is:
Voice-frequency channel test macro of the present invention by the signal level variation of detection filter module output, comes the break-make of the voice-frequency channel of determination module.Owing to adopt automatic test mode, so test rate with respect to manually having great raising, and can not produce test errors, so improved the quality of the module of dispatching from the factory.
The present invention's GPIO interface and ADC interface that can also utilize module self to have is realized the generation of audio signal and the detection of audio signal in addition.So effectively reduced external device, thus the cost that detection system is built reduced, and can expand further the interface function of the module that detects.
Description of drawings
Fig. 1 is the schematic diagram of the first embodiment of voice-frequency channel test macro of the present invention.
Fig. 2 is the schematic diagram of the second embodiment of voice-frequency channel test macro of the present invention.
Fig. 3 is the structural representation of the level shifting circuit of the second embodiment.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
The first embodiment:
As shown in Figure 1, the audio output 1, diverter switch 2, amplification module 3, filtration module 4 and the signal detection module 5 that comprise a PC in the voice-frequency channel test macro of present embodiment.Wherein said module audio path testing system detects the break-make that comprises a module 6 sound intermediate frequency paths that audio frequency passes through.
Module described in the present embodiment 6 has three voice-frequency channels, is respectively the voice-frequency channel of voice-frequency channel, microphone and loud speaker of microphone and receiver or the voice-frequency channel of ear microphone and earphone speaker.
Described diverter switch 2 can so that any one described voice-frequency channel and described amplification module 3 conduct, thereby so that the audio signal of described module 6 output inputs to described amplification module 3.The voice-frequency channel that can test as required of user wherein, in the test access of diverter switch 2 with the voice-frequency channel test macro of described voice-frequency channel access present embodiment, so can detect respectively the break-make situation of three voice-frequency channels of described module 6 by described diverter switch 2.
3 pairs of described audio signals of described amplification module are amplified, and the audio signal after then described filtration module 4 will amplify is carried out second-order filter, make more stable signal level of filtration module output.Adopt the amplifying circuit that the NPN triode consists of in the prior art that audio signal is amplified in the present embodiment, so no longer the principle of described amplifying circuit is given unnecessary details herein.Can adopt as required in addition the amplifying circuit of other kinds or structure to realize the described amplification module 3 of present embodiment.
And also adopt the two-stage RC circuit of prior art and capacitance to be used as filtration module 4 in the present embodiment, because present embodiment sound intermediate frequency signal has fixing frequency, so need to come filtering through the flip-flop in the audio signal behind the voice-frequency channel by capacitance, and come the filtering noise signal by two-stage RC circuit.Because all belonging to prior art, described two-stage RC circuit and capacitance just its principle is not being given unnecessary details herein.And the filter circuit that can adopt as required equally other kinds or structure etc. is realized the described filtration module 4 of present embodiment.
Described signal detection module 5 detects by described filtration module 4 filtered signal levels.After this detect the break-make situation that the signal level variation value is judged the voice-frequency channel of described module 6 by more described signal detection module 5.
The audio output 1 of described PC is to described module 6 input audio signals, because the frequency range that can identify for people's ear is between the 20Hz-20KHz, so the frequency range of the audio signal that module 6 can be exported is inevitable between 20Hz-20KHz, 3.5mm earphone interface in the present embodiment among the employing PC is as audio output, and proportion is that the audio signal of 1KHz is as the audio signal of test usefulness.The difference of the audio output 1 of PC limits the audio signal that adopts different frequency as required in addition.
The operation principle of the voice-frequency channel test macro of present embodiment is as follows:
At first by described diverter switch 2 with the access of voice-frequency channel in three voice-frequency channels in the described module 6 test loop, be about to conducting between the voice-frequency channel to be tested such as described and the amplification module 3.
Then the audio signal of the audio output 1 output 1KHz of described PC is to described module 6, and described module 6 is by its inner voice-frequency channel output, and the described diverter switch 2 of process transfers to described amplification module 3.
3 pairs of described audio signals of described amplification module are amplified, thereby so that the voltage magnitude of described audio signal can satisfy the detection sensitivity of signal detection module 5.
After this flip-flop in the audio signal after the described amplification of described filtration module 4 filterings, and make accordingly the audio signal with certain frequency be converted to more stable signal, thus be convenient to follow-up detection.
At last, described signal detection module 5 detects described level value through signal after the filtering.Surpass a predefined threshold value if detect the variation of described signal, wherein threshold value described in the present embodiment is 0.9V, wherein said threshold value can be adjusted or arrange according to actual conditions, thereby satisfy different detection demand or requirement, for example described threshold value can be any one value between the 0.6V-1V.
When the signal that wherein detects when described signal detection module 5 surpasses the threshold value of above-mentioned 0.9V, be that described signal detection module 5 is when the amplitude of the level of the signal that receives described module 6 outputs surpasses described threshold value, then described signal detection module 5 detects effective signal, and the signal of described module 6 output that detects of described signal detection module 5 must be the signal of audio output 1 output of described PC, so the signal that described signal detection module 5 receives is exactly the signal of audio output 1 output that transfers to the described PC of described signal detection module 5 by described voice-frequency channel, namely the signal of audio output 1 output of described PC transfers in the described signal detection module 5 by described voice-frequency channel at this moment, so described voice-frequency channel must be conducting.
The signal that detects when described signal detection module 5 is during less than or equal to the threshold value of above-mentioned 0.9V, then this moment, described signal detection module 5 can't receive effectively by described voice-frequency channel the signal of audio output 1 output of described PC, so described voice-frequency channel disconnects.
After this switch successively described voice-frequency channel by diverter switch 2, namely successively with in each voice-frequency channel access test loop, thereby finish successively test to three described voice-frequency channels.
The second embodiment:
As shown in Figure 2, comprise in the voice-frequency channel test macro of present embodiment that one switches switch 2, an amplification module 3a and an amplification module 3b, a filtration module 4a and a filtration module 4b, a signal detection module 5 and a level shifting circuit 7.Wherein said voice-frequency channel test macro detects the break-make of the voice-frequency channel of a module 6.
The voice-frequency channel of module described in the present embodiment 6 is the voice-frequency channel of microphone and receiver, and the voice-frequency channel of wherein said microphone and receiver has N and these two paths of P, so need in the present embodiment respectively described N path and P path to be carried out path testing.
And described N path connects amplification module 3a and filtration module 4a successively, and described P path connects amplification module 3b and filtration module 4b successively.
Described diverter switch 2 can so that arbitrary described filtration module 4a or filtration module 4b and described signal detection module 5 conduct, thereby so that the audio signal of described module 6 output inputs to described signal detection module 5 by described amplification module and filtration module.N path or the P path that can test as required of user wherein, in the test access of diverter switch 2 with the voice-frequency channel test macro of described N path or P path access present embodiment, so can detect respectively the break-make situation of described N path or P path by described diverter switch 2.
The GPIO interface output frequency of the described module 6 of present embodiment is that the signal of 200Hz is to described level shifting circuit 7, and through inputting the voice-frequency channel of described module 6 after described level shifting circuit 7 switching levels, so utilize in the present embodiment module 6 self the GPIO Interface realization generation of audio signal, so can omit the outside signal generating source that generates audio signal.Wherein said GPIO interface can also be set to export the signal of different frequency, for example the equifrequent signal of 300Hz.
Wherein since the level of the signal of GPIO interface output and voice-frequency channel to not the mating of the requirement of level, so by level shifting circuit 7 so that the level of the signal of the 200Hz of described GPIO interface output mate with the level requirement of voice-frequency channel.The existing level shifting circuit structure that wherein said level shifting circuit 7 adopts as shown in Figure 3 wherein realizes the conversion of level by the switch of NPN pipe, just its principle is not being given unnecessary details herein.Thereby be controlled in the scope of voice-frequency channel to the requirement of level by the level of described level shifting circuit 7 with the signal of GPIO interface output.
The signal detection module 5 of present embodiment can adopt the ADC interface of module 6 self to realize detection to the filtration module output signal, such as the level that detects output signal etc., so can effectively reduce outer setting equally, simplify the structure of voice-frequency channel test macro, but also can indirectly detect the working condition of ADC interface and GPIO interface in the described module 6.
The 26S Proteasome Structure and Function of the amplification module among the structure of the 3a of amplification module described in the present embodiment, amplification module 3b, filtration module 4a and filtration module 4b and function and the first embodiment and filtration module is identical in addition, just repeats no more herein.
The operation principle of the voice-frequency channel test macro of present embodiment is as follows:
At first by described diverter switch 2 will with etc. conducting between the filtration module 4a that is connected of N path to be tested or P path or filtration module 4b and the signal detection module 5, i.e. ADC interface conducting or the described P path of described N by amplification module 3a and filtration module 4a and the module 6 ADC interface conducting of passing through amplification module 3b and filtration module 4b and module 6.
Then the GPIO interface of described module 6 is exported the audio signal of 200Hz, and by after described level shifting circuit 7 switching levels, exports described amplification module to.
Described amplification module amplifies described audio signal, thereby so that the voltage magnitude of described audio signal can satisfy the detection sensitivity of the ADC interface of described module 6.
After this flip-flop in the audio signal after the described amplification of described filtration module filtering, and the interference noise in the described audio signal of filtering correspondingly.
At last, the ADC interface of described module 6 detects the filtered signal level of described process.If changing, the level value before detecting described signal level value and testing exceeds a predefined threshold value, wherein threshold value described in the present embodiment is 0.8V, wherein said threshold value can be adjusted or arrange according to actual conditions, thereby satisfy different detection demand or requirement, for example described threshold value can be any one value between the 0.6V-1V.
When so the signal that detects when described signal detection module 5 surpasses the threshold value of above-mentioned 0.8V, be that the variation of the level value of the signal that detects of the ADC interface of described module 6 is when exceeding 0.8V, then described signal detection module 5 detects effective signal, and the signal that detects of described signal detection module 5 must be the signal of the GPIO interface output of described module 6, be the described signal detection module 5 inevitable signals that receive the GPIO interface output of described module 6 by described voice-frequency channel, so the signal of the GPIO interface of described module 6 output transfers in the described signal detection module 5 by described voice-frequency channel, thereby described voice-frequency channel is conducting.
The signal that detects when described signal detection module 5 is during less than or equal to the threshold value of above-mentioned 0.8V, then this moment, described signal detection module 5 can't receive effectively by described voice-frequency channel the signal of the GPIO interface output of described module 6, so described voice-frequency channel disconnects.
After this switch to another path by diverter switch 2, namely successively with in the N path of voice-frequency channel and the P path access test loop, thereby finish successively test to described N path and P path.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these execution modes under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (14)
1. a voice-frequency channel test macro is used for the module that test comprises voice-frequency channel, it is characterized in that described voice-frequency channel test macro comprises:
Be used for to generate a signal generating source, a filtration module of an audio signal and for detection of a signal detection module of the audio signal of described module output;
The audio signal that wherein said signal generating source generates is injected described filtration module by a voice-frequency channel of described module, and whether the audio signal that described signal detection module detects described module output is the audio signal that signal generating source generates.
2. voice-frequency channel test macro as claimed in claim 1, it is characterized in that, whether the audio signal that described signal detection module detects described module output surpasses a threshold value, if surpass described threshold value, then the audio signal of described module output is the audio signal that transfers to the described signal generating source generation of described signal detection module by described voice-frequency channel, so the voice-frequency channel conducting of described module, otherwise the voice-frequency channel of described module opens circuit.
3. voice-frequency channel test macro as claimed in claim 2 is characterized in that, described threshold value is 0.6V-1V.
4. voice-frequency channel test macro as claimed in claim 1 is characterized in that, described audio signal has a fixed frequency.
5. such as each described voice-frequency channel test macro among the claim 1-4, it is characterized in that, described module also comprises a plurality of voice-frequency channels, described voice-frequency channel test macro voice-frequency channel test macro comprises that also being serially connected with one between described module and the described filtration module switches switch, wherein said diverter switch can so that any one described voice-frequency channel and described filtration module conduct.
6. voice-frequency channel test macro as claimed in claim 5, it is characterized in that, described voice-frequency channel test macro also comprises an amplification module that is serially connected with between described diverter switch and the described filtration module, and described amplification module is used for the audio signal of the voice-frequency channel output that conducts with described filtration module is amplified.
7. such as each described voice-frequency channel test macro among the claim 1-4, it is characterized in that, described module also comprises a plurality of voice-frequency channels, described voice-frequency channel test macro comprises that also one switches switch and a plurality of filtration module, wherein said voice-frequency channel and described filtration module conduct one to one, described diverter switch can so that any one described filtration module and described signal detection module conduct.
8. voice-frequency channel test macro as claimed in claim 7 is characterized in that, in the every pair of voice-frequency channel and the filtration module, all is serially connected with between described voice-frequency channel and the filtration module for an amplification module that amplifies audio signal.
9. such as each described voice-frequency channel test macro among the claim 1-4, it is characterized in that described voice-frequency channel is the voice-frequency channel of voice-frequency channel, microphone and loud speaker of microphone and receiver or the voice-frequency channel of ear microphone and earphone speaker.
10. such as each described voice-frequency channel test macro among the claim 1-4, it is characterized in that described signal generating source is the audio output of a PC or the GPIO interface of described module.
11. such as each described voice-frequency channel test macro among the claim 1-4, it is characterized in that, described voice-frequency channel test macro also comprises a level shifting circuit that is serially connected with between described signal generating source and the described module, and described level shifting circuit is used for changing the Audio Meter of described signal generating source output.
12., it is characterized in that described signal detection module is the ADC interface of described module such as each described voice-frequency channel test macro among the claim 1-4.
13. voice-frequency channel test macro as claimed in claim 4 is characterized in that the frequency of described audio signal is in 20Hz-20KHz.
14. voice-frequency channel test macro as claimed in claim 13 is characterized in that the frequency of described audio signal is in 200Hz-1KHz.
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| CN104618846A (en) * | 2015-02-12 | 2015-05-13 | 歌尔声学股份有限公司 | Electronic product loudspeaker and microphone testing system and testing method |
| CN105448306A (en) * | 2015-11-05 | 2016-03-30 | 湖南工业大学 | Voice loop detection system |
| CN108064347A (en) * | 2017-11-28 | 2018-05-22 | 福建联迪商用设备有限公司 | The audio pin test method and test device of communication module |
| CN109168120A (en) * | 2018-11-16 | 2019-01-08 | 深圳市爱培科技术股份有限公司 | A kind of loudspeaker and microphone test method, intelligent terminal and storage medium |
| CN110177166A (en) * | 2019-06-10 | 2019-08-27 | 深圳市中诺通讯有限公司 | A kind of mobile phone audio test method and system |
| CN110460945A (en) * | 2018-05-08 | 2019-11-15 | 西安中兴新软件有限责任公司 | A kind of audio channel detecting circuit and detection method |
| CN111343557A (en) * | 2020-02-28 | 2020-06-26 | 西安广和通无线通信有限公司 | Audio signal testing method, device and equipment |
| CN112423195A (en) * | 2020-11-03 | 2021-02-26 | 广东公信智能会议股份有限公司 | Self-checking device and method for audio transmission |
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| CN104618846A (en) * | 2015-02-12 | 2015-05-13 | 歌尔声学股份有限公司 | Electronic product loudspeaker and microphone testing system and testing method |
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| CN111343557A (en) * | 2020-02-28 | 2020-06-26 | 西安广和通无线通信有限公司 | Audio signal testing method, device and equipment |
| CN111343557B (en) * | 2020-02-28 | 2021-10-08 | 西安广和通无线通信有限公司 | Audio signal testing method, device and equipment |
| CN112423195A (en) * | 2020-11-03 | 2021-02-26 | 广东公信智能会议股份有限公司 | Self-checking device and method for audio transmission |
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