CN112492496B - Electronic product audio automatic detection method and system - Google Patents
Electronic product audio automatic detection method and system Download PDFInfo
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- CN112492496B CN112492496B CN202011350997.5A CN202011350997A CN112492496B CN 112492496 B CN112492496 B CN 112492496B CN 202011350997 A CN202011350997 A CN 202011350997A CN 112492496 B CN112492496 B CN 112492496B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention relates to an automatic audio detection method and system for electronic products, which are carried out according to the following steps: step 1, generating a test audio; step 2, copying the test audio into the product to be detected; step 3, connecting and starting up the detected product; step 4, putting the detected product on a detection box, and playing a test audio; step 5, the microphone collects and plays the audio frequency; step 6, the amplifying circuit outputs sine waves, and the comparing circuit outputs square waves; step 7, the operation chip collects and records the audio parameters; step 8, judging whether the threshold values of the collected frequencies are normal and complete, and if the error is less than 5%, updating the threshold values into a judgment standard; and 9, comparing the recorded period, amplitude, total period within 0.5s, maximum value, minimum value and average value of the duty ratio with a set threshold, judging to be qualified if the recorded period, amplitude, total period within 0.5s and maximum value, minimum value and average value of the duty ratio are within a reasonable range, and otherwise, judging to be unqualified. The equipment is simple and quick to operate, can quickly detect products with abnormal frequency and amplitude, improves the production efficiency and ensures the production quality.
Description
Technical Field
The invention relates to the field of electronic product manufacturing, in particular to an electronic product audio automatic detection method and system.
Background
At present, electronic products of intelligent broadcasting type have high market demand, and audio detection equipment aiming at the electronic products of broadcasting type on the market is few, and the price is high.
The existing audio detection has the following defects:
(1) manual detection and judgment are used, so that the efficiency is low and the misjudgment rate is high;
(2) the broadcast audio detection equipment is large and heavy, and is not beneficial to production line adjustment;
(3) the audio detection equipment is complex to operate and needs professional personnel to operate instruments;
(4) the audio detection equipment cannot detect abnormal sound and the problem that the audio detection equipment cannot be installed;
(5) audio detection devices are expensive.
In order to overcome the above problems, we invented an automatic audio detection method and system for electronic products.
Disclosure of Invention
The invention aims to solve the problems that the existing audio detection is low in efficiency, high in misjudgment rate due to manual detection judgment, and broadcast audio detection equipment is expensive, large in size, heavy, not beneficial to production line adjustment, complex in operation, required to be operated by a professional, abnormal sound and failure in installation cannot be detected. The concrete solution is as follows:
an automatic audio detection method for electronic products is carried out according to the following steps:
step 1, generating a test audio;
step 2, packaging and copying the test audio and the test program into the detected product;
step 3, connecting the detected product with a detection line and starting up the machine;
step 4, putting the detected product on a detection box, and automatically triggering a broadcasting instruction by a sensor to enable the detected product to play a test audio;
step 5, a microphone in the detection box collects and plays audio and sends the audio to a testing device;
step 6, outputting sine waves through an amplifying circuit, and outputting square waves through a comparing circuit;
step 7, the operation chip collects and records the audio parameters;
step 8, if the current mode is a recorded threshold updating mode, updating the threshold into a judgment standard by judging whether the threshold of each frequency is normally and completely acquired, and if the error is less than 5 percent, calling the updated threshold by a subsequent test;
step 9, if the current mode is the detection mode, comparing the recorded period, amplitude, total period within 0.5s, maximum value, minimum value and average value of duty ratio with a set threshold, if the recorded period, amplitude, total period within 0.5s and maximum value, minimum value and average value of duty ratio are within a reasonable range, judging that the duty ratio is qualified, otherwise, judging that the duty ratio is unqualified;
step 11, sending an instruction to a detected product, entering a self-checking mode, outputting a self-checking result to a testing device through a serial port, and displaying the testing result;
and step 12, shutting down the machine to take out the detected product, changing to the next detected product, and turning to the step 3.
Further, the method for generating the test audio in step 1 is performed according to the following steps:
step 1-1, opening audio production software;
1-2, placing a section of sine wave audio at intervals of 1s, wherein the audio frequency of each section is different, and taking the value of the audio frequency at intervals of 1 KHz;
step 1-3, adjusting the playing time of each section of audio to be 0.5s, and stopping for 0.5 s;
step 1-4, adjusting the loudness of each section of audio to ensure that the microphone does not generate waveform distortion during acquisition;
and 1-5, completing and storing the test audio.
Further, the sensor is a light sensor.
Further, the method for acquiring audio parameters in step 7 is performed according to the following steps:
7-1, acquiring amplitude data at an interval of 10us by operating a chip; acquiring high and low level period data in square waves through external interruption;
step 7-2, judging whether the test audio is played normally according to the audio cycle parameters, and starting overtime to finish the test process;
7-3, if the test audio is detected, filtering out data of the front 20 periods and the rear 20 periods of each frequency segment;
and 7-4, collecting the period and the amplitude of the audio, the total period within 0.5s and the duty ratio, calculating the maximum value, the minimum value and the average value of the corresponding detection items through a sorting and mean algorithm, and recording.
Further, the method for recording the recording threshold in the threshold updating mode in step 8 is the same as the method for acquiring the audio parameters.
Further, in step 10, the LED lamp indicates the detection result in the following manner: detecting that the green lamp is turned on, and other lamps are turned off; and if the detection fails, the red light is lightened, and the option light which does not pass the detection is lightened.
An automatic audio detection system for electronic products is used for executing the automatic audio detection method for electronic products, and comprises a detection box, a detected product placed on the detection box, a microphone arranged in the detection box and aligned with a loudspeaker of the detected product, and a testing device arranged outside the detection box.
Furthermore, the testing device comprises a sensor arranged close to the detected product, an operation chip electrically connected with the sensor and the detected product respectively, an amplifying circuit electrically connected with the microphone, and a comparison circuit electrically connected with the amplifying circuit, wherein the comparison circuit is electrically connected with the operation chip, the operation chip is electrically connected with the memory, and the operation chip is arranged on a panel of the testing device and is electrically connected with the operation chip.
Further, the LED lamp comprises a red LED lamp and a green LED lamp.
Furthermore, the sensor is a light sensor, the detection box is a closed box body with an opening at the upper part, the width of the box body is changed to 30cm, and the linear distance between the microphone and the detected product is 30 cm.
In summary, the technical scheme of the invention has the following beneficial effects:
the scheme solves the problems that the existing audio detection is low in efficiency, high in misjudgment rate, expensive, large in size and heavy in price, is not beneficial to production line adjustment, complex in operation, and incapable of detecting abnormal sound and problems in installation, and manual detection judgment is used for the existing audio detection. This scheme uses the frequency hopping sound source, uses in the enclosure space, can short-term test loudspeaker report's frequency and amplitude, and whole testing process easy operation, swift can short-term test frequency and the unusual product of amplitude, has improved production efficiency, has guaranteed production quality. The device is small in size, low in cost and convenient to move, and can automatically and effectively detect the problems of frequency distortion, small loudness, broadcast loss, abnormal sound and improper installation of the loudspeaker. The test audio frequency generated by the scheme is beneficial to eliminating test environment interference and improving test precision. The scheme adopts a unique audio parameter acquisition method, so that the audio analysis and judgment speed of the testing device is increased, and the testing accuracy is improved. This scheme has adopted a plurality of LED lamps as instructing, can surveyability observe the condition of test item and test status and result. The scheme is not only suitable for audio detection of broadcast electronic products, but also can be used for audio detection of other electronic products with loudspeakers, and has the advantages of good universality and strong practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of an automatic audio detection method for an electronic product according to the present invention;
FIG. 2 is a flow chart of a method of generating test audio according to the present invention;
FIG. 3 is a flow chart of a method of acquiring audio parameters according to the present invention;
fig. 4 is a block diagram of an automatic audio detection system of an electronic product according to the present invention.
Description of reference numerals:
10-a detection box, 20-a product to be detected, 30-a microphone, 40-a testing device, 41-a sensor, 42-an operation chip, 43-an amplifying circuit, 44-a comparison circuit, 45-a memory and 46-an LED lamp.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an automatic audio detection method for an electronic product is performed according to the following steps:
step S1, generating a test audio;
step S2, packaging and copying the test audio and the test program into the product to be tested;
step S3, connecting the detected product with a detection line and starting up the machine;
step S4, placing the product to be detected on a detection box, and automatically triggering a broadcast instruction by a sensor to enable the product to be detected to play a test audio;
step S5, the microphone in the detection box collects the playing audio and sends the audio to the testing device;
s6-1, outputting a sine wave through an amplifying circuit, and outputting a square wave through a comparing circuit S6-2;
step S7, the operation chip collects and records the audio parameters;
step S8, if the current mode is a recorded threshold updating mode, updating the threshold into the judgment standard by judging whether the threshold of each frequency is normal and complete, if the error is less than 5%, and calling the updated threshold in the subsequent test;
step S9, if the current mode is the detection mode, comparing the recorded period, amplitude, total period within 0.5S, maximum value, minimum value and average value of duty ratio with the set threshold value, if the recorded period, amplitude, total period within 0.5S, maximum value, minimum value and average value of duty ratio are within a reasonable range, judging to be qualified, otherwise, judging to be unqualified;
step S10, after the audio detection of the detected product is passed, the detected product is informed to delete the test audio file, and the LED lamp indicates the detection result; (the LED lamp indicates the detection result in a way that the green lamp is turned on when the detection is passed, other lamps are turned off, the red lamp is turned on when the detection is not passed, and the option lamp which does not pass the detection is turned on)
Step S11, sending an instruction to the product to be tested, entering a self-test mode, outputting a self-test result to a test device through a serial port, and displaying the test result;
step S12, the machine is turned off to take out the detected product, and the next detected product is replaced, and step S3 is executed.
Further, as shown in fig. 2, the method for generating the test audio in step S1 is performed according to the following steps:
step S1-1, opening audio making software;
s1-2, placing a section of sine wave audio at intervals of 1S, wherein the audio frequency of each section is different, and the audio frequency is sampled at intervals of 1 KHz;
step S1-3, adjusting the playing time of each audio segment to 0.5S, and stopping for 0.5S;
step S1-4, adjusting the loudness of each section of audio, so that waveform distortion cannot be generated when the microphone collects the audio;
and step S1-5, completing and storing the test audio.
Further, as shown in fig. 3, the method for acquiring audio parameters in step S7 is performed according to the following steps:
step S7-1, calculating a chip interval of 10us to collect amplitude data; acquiring high and low level period data in square waves through external interruption;
step S7-2, according to the audio cycle parameter, judging whether the test audio is played normally, and opening overtime to end the test flow;
step S7-3, if the test audio is detected, filtering out the data of the front 20 periods and the back 20 periods of each frequency segment;
and step S7-4, acquiring the period and amplitude of the audio, the total period within 0.5S and the duty ratio, calculating the maximum value, the minimum value and the average value of the corresponding detection items through a sorting and mean algorithm, and recording.
Further, the method of recording the recording threshold of the threshold updating mode in step S8 is the same as the method of acquiring the audio parameter.
As shown in fig. 4, an automatic audio detection system for electronic products, for performing the above automatic audio detection method for electronic products, includes a detection box 10, a product 20 to be detected placed on the detection box 10, a microphone 30 disposed inside the detection box 10 and aligned with a speaker of the product 20 to be detected (the speaker is mounted inside the product 20 to be detected, not shown), and a testing device 40 disposed outside the detection box 10.
Further, the test apparatus 40 includes a sensor 41 disposed near the product to be tested, an operation chip 42 electrically connected to the sensor 41 and the product to be tested 20, an amplification circuit 43 electrically connected to the microphone 30, a comparison circuit 44 electrically connected to the amplification circuit 43, the comparison circuit 44 electrically connected to the operation chip 42, the operation chip 42 electrically connected to a memory 45, a plurality of LED lamps 46 disposed on a panel of the test apparatus 40, and the LED lamps 46 electrically connected to the operation chip 42. The LED lamps 46 include red LED lamps and green LED lamps, some of which are used for option lamps and some of which are used for status lamps.
The sensor 41 is a light sensor, the detection box 10 is a closed box with an open upper part, the width of the box is changed to 30cm, and the linear distance between the microphone 30 and the detected product 20 is 30 cm. The linear distance between the detected product 20 and the microphone 10 can be adjusted properly according to actual needs, and the size of the detection box 10 can be adjusted correspondingly. The operation chip 42 of the present embodiment is a single chip microcomputer in the prior art, and the specific working principle thereof is not described herein, and the memory 45 stores a preset detection program, system parameters, and test data. The sensor 41 may be replaced with a travel switch.
In summary, the technical scheme of the invention has the following beneficial effects:
the scheme solves the problems that the existing audio detection is low in efficiency, high in misjudgment rate, expensive, large in size and heavy in price, is not beneficial to production line adjustment, complex in operation, and incapable of detecting abnormal sound and problems in installation, and manual detection judgment is used for the existing audio detection. This scheme uses the frequency hopping sound source, uses in the enclosure space, can short-term test loudspeaker report's frequency and amplitude, and whole testing process easy operation, swift can short-term test frequency and the unusual product of amplitude, has improved production efficiency, has guaranteed production quality. The device is small in size, low in cost and convenient to move, and can automatically and effectively detect the problems of frequency distortion, small loudness, broadcast loss, abnormal sound and improper installation of the loudspeaker. The test audio frequency generated by the scheme is beneficial to eliminating test environment interference and improving test precision. The scheme adopts a unique audio parameter acquisition method, so that the audio analysis and judgment speed of the testing device is increased, and the testing accuracy is improved. This scheme has adopted a plurality of LED lamps as instructing, can surveyability observe the condition of test item and test status and result. The scheme is not only suitable for audio detection of broadcast electronic products, but also can be used for audio detection of other electronic products with loudspeakers, and has the advantages of good universality and strong practicability.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (8)
1. An automatic audio detection method for electronic products is characterized by comprising the following steps:
step 1, generating a test audio;
step 2, packaging and copying the test audio and the test program into the detected product;
step 3, connecting the detected product with a detection line and starting up the machine;
step 4, putting the detected product on a detection box, and automatically triggering a broadcasting instruction by a sensor to enable the detected product to play a test audio;
step 5, a microphone in the detection box collects and plays audio and sends the audio to a testing device;
step 6, outputting sine waves through an amplifying circuit, and outputting square waves through a comparing circuit;
step 7, the operation chip collects and records the audio parameters;
step 8, if the current mode is a recorded threshold updating mode, updating the threshold into a judgment standard by judging whether the threshold of each frequency is normally and completely acquired, and if the error is less than 5 percent, calling the updated threshold by a subsequent test;
step 9, if the current mode is the detection mode, comparing the recorded period, amplitude, total period within 0.5s, maximum value, minimum value and average value of duty ratio with a set threshold, if the recorded period, amplitude, total period within 0.5s and maximum value, minimum value and average value of duty ratio are within a reasonable range, judging that the duty ratio is qualified, otherwise, judging that the duty ratio is unqualified;
step 10, after the audio detection of the detected product passes, informing the detected product to delete the test audio file, and indicating the detection result by an LED lamp;
step 11, sending an instruction to a detected product, entering a self-checking mode, outputting a self-checking result to a testing device through a serial port, and displaying the testing result;
step 12, shutting down the machine to take out the detected product, changing to the next detected product, and turning to the step 3;
the method for generating the test audio in the step 1 is carried out according to the following steps:
step 1-1, opening audio production software;
step 1-2, placing a section of sine wave audio at intervals of 1s, wherein the audio frequency of each section is different, and the audio frequency is sampled at intervals of 1 KHz;
step 1-3, adjusting the playing time of each section of audio to be 0.5s, and stopping for 0.5 s;
step 1-4, adjusting the loudness of each section of audio to ensure that the microphone does not generate waveform distortion during acquisition;
step 1-5, completing and storing the test audio;
the method for acquiring the audio parameters in the step 7 is carried out according to the following steps:
7-1, acquiring amplitude data at an interval of 10us by operating a chip; acquiring high and low level period data in square waves through external interruption;
step 7-2, judging whether the test audio is played normally according to the audio cycle parameters, and starting overtime to finish the test process;
7-3, if the test audio is detected, filtering out data of the front 20 periods and the rear 20 periods of each frequency segment;
and 7-4, collecting the period and the amplitude of the audio, the total period within 0.5s and the duty ratio, calculating the maximum value, the minimum value and the average value of the corresponding detection items through a sorting and mean algorithm, and recording.
2. The automatic audio detection method for electronic products according to claim 1, wherein: the sensor is a light sensor.
3. The automatic audio detection method for electronic products according to claim 1, wherein: the method for recording the recording threshold in the threshold updating mode in step 8 is the same as the method for acquiring the audio parameters.
4. The method as claimed in claim 1, wherein the LED light indicates the detection result in the step 10 by: detecting that the green light is turned on and other lights are turned off; and if the detection fails, the red light is lightened, and the option light which does not pass the detection is lightened.
5. An electronic product audio automatic detection system for executing the electronic product audio automatic detection method of any one of claims 1 to 4, characterized in that: the device comprises a detection box, a detected product placed on the detection box, a microphone arranged in the detection box and aligned with a loudspeaker of the detected product, and a testing device arranged outside the detection box.
6. The automatic audio detection system for electronic products according to claim 5, wherein: the testing device comprises a sensor, an operation chip, an amplifying circuit, a comparison circuit and an operation chip, wherein the sensor is close to the detected product, the operation chip is electrically connected with the sensor and the detected product respectively, the amplifying circuit is electrically connected with the microphone, the comparison circuit is electrically connected with the amplifying circuit, the comparison circuit is electrically connected with the operation chip, the operation chip is electrically connected with the memory, the LED lamps are arranged on the panel of the testing device, and the LED lamps are electrically connected with the operation chip.
7. The automatic audio detection system for electronic products according to claim 6, wherein: the LED lamp comprises a red LED lamp and a green LED lamp.
8. The automatic audio detection system for electronic products according to claim 7, wherein: the sensor is a light-sensitive sensor, the detection box is a closed box body with an opening at the upper part, the width of the box body is changed to 30cm, and the linear distance between the microphone and the detected product is 30 cm.
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| CN102404669A (en) * | 2011-11-10 | 2012-04-04 | 赵跃庆 | Circuit and method for detecting audio frequency |
| CN102421056A (en) * | 2011-12-26 | 2012-04-18 | 华为终端有限公司 | Method and device for detecting speaker |
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| TWI413359B (en) * | 2009-07-24 | 2013-10-21 | Wistron Corp | High efficiency audio amplifier and method thereof |
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| CN102404669A (en) * | 2011-11-10 | 2012-04-04 | 赵跃庆 | Circuit and method for detecting audio frequency |
| CN102421056A (en) * | 2011-12-26 | 2012-04-18 | 华为终端有限公司 | Method and device for detecting speaker |
| CN108430023A (en) * | 2018-02-12 | 2018-08-21 | 苏州乐轩科技有限公司 | A kind of sound equipment full-automatic testing equipment |
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