CN112995880A - Automatic testing system and method for audio module - Google Patents
Automatic testing system and method for audio module Download PDFInfo
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- CN112995880A CN112995880A CN202110063573.9A CN202110063573A CN112995880A CN 112995880 A CN112995880 A CN 112995880A CN 202110063573 A CN202110063573 A CN 202110063573A CN 112995880 A CN112995880 A CN 112995880A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses an automatic testing system and method for an audio module, wherein a data processing module is connected with a parallel control module, the parallel control module is connected with a digital-to-analog conversion module, an analog-to-digital conversion module and a power consumption measuring module, the audio module is connected to the data processing module through a Type-C interface, the data processing module judges whether THD + N and SNR are within a preset range or not by performing FFT analysis and calculation on THD + N and SNR parameters and the like, and therefore performance detection of the audio module is achieved. Through integrated consumption measurement module, can monitor the consumption parameter of audio frequency module for its stability of analysis need not set up the instrument of extra instrument and carry out the consumption measurement.
Description
Technical Field
The invention relates to the technical field of audio testing, in particular to an automatic testing system and method for an audio module.
Background
With the popularization of the Type-C interface, the application of the Type-C interface in mobile equipment such as computers and mobile phones is very wide. Type-C earphones are gradually becoming standard fittings, and the testing of Type-C audio frequency module is the important means of detecting its performance. Currently, most audio test systems on the market are large in size, expensive and inconvenient to test. The automatic testing effect and the testing efficiency of the testing items such as audio parameter testing, performance testing, function testing, data analysis, data storage, curve drawing, failure analysis and the like are low.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides an automatic testing system and method for an audio module.
The invention provides an automatic testing system of an audio module, which comprises: the device comprises a data processing module, a parallel control module, a digital-to-analog conversion module and an analog-to-digital conversion module; the data processing module is connected with the parallel control module, and the parallel control module is connected with the digital-to-analog conversion module and the analog-to-digital conversion module;
the data processing module is used for being connected with the audio module through a Type-C interface; the digital-to-analog conversion module is used for being connected with a microphone module of the audio module, and the analog-to-digital conversion module is used for being connected with a power amplification module of the audio module;
in a first working state, the data processing module is used for transmitting a standard audio file to the parallel control module, the parallel control module is used for transmitting the standard audio file to the digital-to-analog conversion module, and the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal; the data processing module is used for carrying out FFT analysis according to the audio analog signal collected by the microphone module of the audio module, calculating THD + N and SNR parameters and judging whether the THD + N and the SNR are within a preset range or not;
in a second working state, the data processing module is used for playing a standard audio file through the audio module, the analog-to-digital conversion module is used for collecting audio analog signals output by the power amplification module of the audio module, performing analog-to-digital conversion and outputting audio digital signals, the parallel control module is used for transmitting the audio digital signals to the data processing module, the data processing module is used for performing FFT analysis on the audio digital signals, calculating THD + N and SNR parameters, and judging whether THD + N and SNR are within a preset range.
Preferably, the audio module further comprises a power consumption measuring module, which is connected with the parallel control module and is used for detecting the power consumption of the audio module in the working state and the non-working state.
Preferably, the data processing module adopts a Mini computer and can be connected with the audio module through a Type-C interface;
preferably, the digital-to-analog conversion module DAC is AK 4497; preferably, the analog-to-digital conversion module ADC is AK 5397; preferably, the parallel control module adopts an Artix 7 series programmable logic gate array FPGA of Xilinx; preferably, the power consumption measuring module is a power consumption monitoring chip INA 226.
The invention also provides an automatic testing method of the audio module, which comprises the following steps:
starting the test;
the data processing module transmits a standard audio file to the parallel control module;
the parallel control module transmits the standard audio file to the digital-to-analog conversion module,
the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal;
the data processing module carries out FFT analysis according to the audio analog signal collected by the microphone module of the audio module and calculates THD + N and SNR parameters;
the data processing module judges whether the THD + N and the SNR are within a preset range;
and when the judgment result is negative, the test is finished.
Preferably, when the judgment result is yes, the method further comprises:
the data processing module plays a standard audio file through the audio module;
the analog-to-digital conversion module collects audio analog signals output by a power amplification module of the audio module, performs analog-to-digital conversion and outputs audio digital signals;
the parallel control module transmits the audio digital signal to the data processing module;
the data processing module is used for carrying out FFT analysis on the audio digital signal and calculating THD + N and SNR parameters;
the data processing module judges whether the THD + N and the SNR are within a preset range;
recording and storing;
and (5) finishing the test.
Preferably, when the data processing module transmits the standard audio file to the parallel control module, the method further comprises: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the audio module when the audio module does not work.
Preferably, when the microphone module of the audio module collects the audio analog signal, the method further includes: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the microphone module of the audio module when the microphone module is not operated.
Preferably, when the power amplifier module of the audio module outputs the audio analog signal, the method further includes: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the power amplifier module of the audio module when the power amplifier module does not work.
In the system and the method for automatically testing the audio module, the data processing module is connected with the parallel control module, the parallel control module is connected with the digital-to-analog conversion module, the analog-to-digital conversion module and the power consumption measurement module, the audio module is connected to the data processing module through the Type-C interface, the data processing module judges whether THD + N and SNR are within a preset range or not by performing FFT analysis and calculation on THD + N and SNR parameters and the like, and therefore performance detection of the audio module is achieved.
Through integrated consumption measurement module, can monitor the consumption parameter of audio frequency module for its stability of analysis need not set up the instrument of extra instrument and carry out the consumption measurement.
Drawings
Fig. 1 is a schematic structural diagram of an audio module automatic test system according to the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of an audio module automatic test system according to an embodiment of the present invention.
Referring to fig. 1, an audio module automatic testing system provided by the embodiment of the present invention includes: the device comprises a data processing module, a parallel control module, a digital-to-analog conversion module, an analog-to-digital conversion module and a power consumption measuring module;
the data processing module is connected with the parallel control module, and the parallel control module is connected with the digital-to-analog conversion module, the analog-to-digital conversion module and the power consumption measuring module.
The data processing module is communicated with the parallel control module FPGA and used for sending test instructions, processing, analyzing, storing data and the like. The data processing module adopts a Mini computer and can be connected with the audio module through a Type-C interface.
And the parallel control module FPGA performs parallel work of the audio data output module, the audio data acquisition module and the power consumption measurement module. The parallel control module adopts an Artix 7 series programmable logic gate array FPGA of Xilinx;
the digital-to-analog conversion module DAC is controlled by the parallel control module FPGA and used for outputting audio signals. The digital-to-analog conversion module DAC adopts AK 4497.
The analog-to-digital conversion module ADC is used for collecting analog signals output by the audio module, converting the analog signals into digital signals and outputting the digital signals to the parallel control module. The analog-to-digital conversion module ADC adopts AK 5397;
the power consumption measuring module is used for measuring the power consumption of the audio module during working and non-working. The power consumption measurement module employs a power consumption monitoring chip INA 226.
When the Type-C audio module is subjected to performance test, the audio module is connected to the data processing module through the Type-C interface, and the audio module is identified as a computer sound card and can play an audio file; the digital-to-analog conversion module DAC is connected with the microphone module MIC of the audio module, and the analog-to-digital conversion module ADC is connected with the power amplification module AMP of the audio module. And the power line Vbus is separately wired into the power consumption measurement module on the circuit.
In a first working state, the data processing module starts a test, and the audio module is identified as a computer sound card.
The data processing module transmits a standard audio file to the parallel control module and stores the standard audio file in a cache DDR of the parallel control module; the power consumption measuring module synchronously measures the power consumption of the audio module when the audio module is not in operation.
The parallel control module transmits the standard audio file to the digital-to-analog conversion module, and the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal.
A microphone module of the audio module collects audio analog signals and transmits the audio analog signals to the data processing module; the power consumption measuring module synchronously measures the power consumption of the microphone module of the audio module during working.
The data processing module carries out FFT (Fast Fourier Transform) analysis according to an audio analog SIGNAL collected by a microphone module of the audio module, calculates THD + N (Total Harmonic Distortion + Noise, Total Harmonic Distortion plus Noise) and SNR (Signal Noise RATIO) parameters and the like, and judges whether the THD + N and the SNR are within a preset range;
and in a second working state, the data processing module plays the standard audio file through the audio module.
The power amplification module AMP of the audio module outputs an analog audio signal and transmits the analog audio signal to the analog-to-digital conversion module; the power consumption measuring module synchronously measures the power consumption of the power amplifier module of the audio module during working.
The analog-to-digital conversion module collects audio analog signals output by a power amplification module of the audio module, performs analog-to-digital conversion and outputs audio digital signals.
The parallel control module is used for transmitting the audio digital signals to the data processing module.
The data processing module carries out FFT analysis on the audio digital signal, calculates THD + N and SNR parameters, and judges whether THD + N and SNR are within a preset range.
In the automatic testing system for the audio module, the data processing module is connected with the parallel control module, the parallel control module is connected with the digital-to-analog conversion module, the analog-to-digital conversion module and the power consumption measuring module, the audio module is connected to the data processing module through the Type-C interface, the data processing module judges whether THD + N and SNR are within a preset range or not by performing FFT analysis and calculating THD + N and SNR parameters and the like, and therefore performance detection of the audio module is achieved. Through integrated consumption measurement module, can monitor the consumption parameter of audio frequency module for its stability of analysis need not set up the instrument of extra instrument and carry out the consumption measurement.
The embodiment of the invention also provides an automatic testing method of the audio module, which comprises the following steps:
s11, starting the test;
s12, the data processing module transmits a standard audio file to the parallel control module and stores the standard audio file in a cache DDR of the parallel control module;
s13, the parallel control module transmits the standard audio file to the digital-to-analog conversion module;
s14, the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal;
s15, a microphone module of the audio module collects audio analog signals and transmits the audio analog signals to the data processing module;
s16, the data processing module performs FFT analysis according to the audio analog signal collected by the microphone module of the audio module and calculates THD + N and SNR parameters;
s17, the data processing module judges whether THD + N and SNR are within a preset range;
and S18, if the judgment result is negative, ending the test.
S21, when the judgment result is yes, the data processing module plays the standard audio file through the audio module;
s22, outputting an analog audio signal by an AMP (amplifier) of the audio module and transmitting the analog audio signal to the analog-to-digital conversion module;
s23, the analog-to-digital conversion module collects the audio analog signal output by the power amplification module of the audio module, performs analog-to-digital conversion and outputs an audio digital signal;
s24, the parallel control module transmits the audio digital signal to the data processing module;
s25, the data processing module performs FFT analysis on the audio digital signal and calculates THD + N and SNR parameters;
s26, the data processing module judges whether THD + N and SNR are within a preset range;
s27, recording and storing;
and S28, ending the test.
And S12, when the data processing module transmits the standard audio file to the parallel control module, the power consumption measuring module measures the power consumption of the audio module and detects the voltage and the current of the audio module when the audio module is not in operation.
When the microphone module of S15 audio frequency module gathered audio frequency analog signal, the power consumption measurement module carried out the power consumption measurement to the audio frequency module, detected the voltage and the electric current of the microphone module busy hour of audio frequency module.
When the power amplifier module of S22 audio frequency module exports audio frequency analog signal, still include: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the power amplifier module of the audio module during busy hours.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. An automated audio module testing system, comprising: the device comprises a data processing module, a parallel control module, a digital-to-analog conversion module and an analog-to-digital conversion module; the data processing module is connected with the parallel control module, and the parallel control module is connected with the digital-to-analog conversion module and the analog-to-digital conversion module;
the data processing module is used for being connected with the audio module through a Type-C interface; the digital-to-analog conversion module is used for being connected with a microphone module of the audio module, and the analog-to-digital conversion module is used for being connected with a power amplification module of the audio module;
in a first working state, the data processing module is used for transmitting a standard audio file to the parallel control module, the parallel control module is used for transmitting the standard audio file to the digital-to-analog conversion module, and the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal; the data processing module is used for carrying out FFT analysis according to the audio analog signal collected by the microphone module of the audio module, calculating THD + N and SNR parameters and judging whether the THD + N and the SNR are within a preset range or not;
in a second working state, the data processing module is used for playing a standard audio file through the audio module, the analog-to-digital conversion module is used for collecting audio analog signals output by the power amplification module of the audio module, performing analog-to-digital conversion and outputting audio digital signals, the parallel control module is used for transmitting the audio digital signals to the data processing module, the data processing module is used for performing FFT analysis on the audio digital signals, calculating THD + N and SNR parameters, and judging whether THD + N and SNR are within a preset range.
2. The system for automatically testing the audio module according to claim 1, further comprising a power consumption measuring module connected to the parallel control module for detecting the power consumption of the audio module in the working state and the non-working state.
3. The automatic testing system of the audio module according to claim 1 or 2, wherein the data processing module is a Mini computer and can be connected to the audio module through a Type-C interface;
preferably, the digital-to-analog conversion module DAC is AK 4497; preferably, the analog-to-digital conversion module ADC is AK 5397; preferably, the parallel control module adopts an Artix 7 series programmable logic gate array FPGA of Xilinx; preferably, the power consumption measuring module is a power consumption monitoring chip INA 226.
4. An automated testing method for an audio module, comprising:
starting the test;
the data processing module transmits a standard audio file to the parallel control module;
the parallel control module transmits the standard audio file to the digital-to-analog conversion module;
the digital-to-analog conversion module performs digital-to-analog conversion and outputs an audio analog signal;
the data processing module carries out FFT analysis according to the audio analog signal collected by the microphone module of the audio module and calculates THD + N and SNR parameters;
the data processing module judges whether the THD + N and the SNR are within a preset range;
and when the judgment result is negative, the test is finished.
5. The method for automatically testing the audio module according to claim 4, wherein when the determination result is yes, the method further comprises:
the data processing module plays a standard audio file through the audio module;
the analog-to-digital conversion module collects audio analog signals output by a power amplification module of the audio module, performs analog-to-digital conversion and outputs audio digital signals;
the parallel control module transmits the audio digital signal to the data processing module;
the data processing module is used for carrying out FFT analysis on the audio digital signal and calculating THD + N and SNR parameters;
the data processing module judges whether the THD + N and the SNR are within a preset range;
recording and storing;
and (5) finishing the test.
6. The method for automatically testing the audio module according to claim 4 or 5, wherein when the data processing module transmits the standard audio file to the parallel control module, the method further comprises: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the audio module when the audio module does not work.
7. The method for automatically testing the audio module according to claim 4 or 5, wherein when the microphone module of the audio module collects the audio analog signal, the method further comprises: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the microphone module of the audio module when the microphone module is not operated.
8. The automatic testing method of the audio module according to claim 4 or 5, wherein when the power amplifier module of the audio module outputs the audio analog signal, the method further comprises: the power consumption measuring module is used for measuring the power consumption of the audio module and detecting the voltage and the current of the power amplifier module of the audio module when the power amplifier module does not work.
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