CN112714392A - Vibration test system and vibration test method for earphone voice pickup sensor - Google Patents
Vibration test system and vibration test method for earphone voice pickup sensor Download PDFInfo
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- CN112714392A CN112714392A CN202110330905.5A CN202110330905A CN112714392A CN 112714392 A CN112714392 A CN 112714392A CN 202110330905 A CN202110330905 A CN 202110330905A CN 112714392 A CN112714392 A CN 112714392A
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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
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to the technical field of earphone testing, in particular to a vibration testing system and a vibration testing method for an earphone voice pickup sensor. The sound card receives a signal transmitted by the upper computer and outputs the signal to the power amplifier, and the power amplifier amplifies the signal and then drives the vibration table to vibrate; the adaptive amplifier provides power for the acceleration sensor and transmits signals fed back by the acceleration sensor to the sound card, and the sound card receives the signals and transmits the signals to the upper computer. The testing method comprises the step of calibrating the vibration testing system by utilizing the factory calibration curve of the acceleration sensor. The system and the test method utilize the acceleration sensor to calibrate the amplitude of the vibration table, solve the problem that the amplitudes of the vibration tables of a plurality of sets of test systems are inconsistent under the same frequency, are convenient for copying the vibration test system, have the advantages of accurate test result, high efficiency, good stability and the like, and can meet the requirement of batch test of production lines.
Description
Technical Field
The invention relates to the technical field of earphone testing, in particular to a vibration testing system and a vibration testing method for an earphone voice pickup sensor.
Background
The voice pickup sensor is an important part in the earphone, wherein the bone conduction earphone voice pickup sensor is a vibration audio sensing element designed by utilizing the testing principle of an acceleration sensor, and is mainly used for the anti-noise communication of wireless Bluetooth earphones, underwater communication, hearing aids and all high-noise special environments. Bone conduction is a sound conduction mode, that is, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ and the auditory center of a human body. Compared with a classical sound conduction mode of generating sound waves through a vibrating diaphragm, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air.
The vibration test system of the voice pickup sensor in the prior art is used for providing inconsistent amplitude of a vibration table of a vibration source under the same frequency, so that the test difference among various vibration test systems is large, and the batch test of products cannot be guaranteed. And the vibration source is noisy in the production line environment, the interference is much, the bone conduction headset voice pickup sensor test can introduce an external interference signal into the test result, and the accuracy of the test data is influenced. Therefore, the voice pickup sensor can only pass through laboratory detection at present, and batch test of a production line cannot be realized. Therefore, how to implement the industrial batch test of the voice pickup sensor detection function in the product development stage and the production stage is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problems, provides a vibration test system and a vibration test method for an earphone voice pickup sensor, solves the problem of inconsistent amplitude of vibration tables among a plurality of sets of vibration test systems under the same frequency, is convenient for the vibration test system to copy, has the advantages of accurate test result, high test efficiency, good system stability and the like, and can meet the requirement of batch test of production lines.
In order to solve the above problems, the technical scheme adopted by the invention is as follows:
a vibration test system of an earphone voice pickup sensor comprises an upper computer capable of sending an operation command, a vibration table and an acceleration sensor arranged on the vibration table; the system also comprises a sound card, an adaptive amplifier and a power amplifier; the sound card receives a signal transmitted by the upper computer and outputs the signal to the power amplifier, and the power amplifier amplifies the signal transmitted by the sound card and then drives the vibration table to vibrate; the adaptive amplifier provides power for the acceleration sensor and transmits a signal fed back by the acceleration sensor to the sound card, and the sound card receives the signal transmitted by the adaptive amplifier and transmits the signal to the upper computer.
As an improvement, the acceleration sensor is arranged at the central position of the vibration table.
As an improvement, the vibration testing system further comprises an earphone mounting seat arranged on the vibration table.
As an improvement, the vibration testing system further comprises a Bluetooth adapter or a data line for establishing communication between the upper computer and the Bluetooth headset.
As an improvement, the vibration table is arranged on a base, and the mass of the base is not less than 200 kg.
As an improvement, the base is a marble base.
A vibration test method for an earphone voice pickup sensor comprises the following steps:
s1, calibrating the vibration test system by using the factory calibration curve of the acceleration sensor;
s2, outputting a frequency response curve to an upper computer by a voice pickup sensor of the earphone to be tested;
and S3, the upper computer analyzes and processes the frequency response curve output by the earphone voice pickup sensor and judges the test result.
As a modification, the S1 includes the steps of:
s101, the upper computer provides an input signal for the power amplifier through the sound card, and the vibration table drives the acceleration sensor to vibrate together;
s102, outputting a frequency response curve by the acceleration sensor, and feeding back the frequency response curve to an upper computer through an adaptive amplifier and a sound card;
s103, comparing a frequency response curve output by the acceleration sensor with a factory calibration curve by the upper computer;
s104, if the frequency response curve output by the acceleration sensor is consistent with the factory calibration curve, completing calibration; if the frequency response curve output by the acceleration sensor is inconsistent with the factory calibration curve, changing the power of the input signal of the upper computer to the vibration table, and repeating S101 to S103; and completing calibration until the obtained frequency response curve output by the acceleration sensor is consistent with the factory calibration curve.
As an improvement, the input signal provided by the upper computer in S101 to the power amplifier through the sound card is a sinusoidal frequency conversion curve.
As an improvement, in S2, after the vibration test system is calibrated, the input signal of the upper computer is unchanged, and a frequency response curve output by the speech pickup sensor of the headset to be tested on the vibration table is collected.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
1. the technical scheme solves the consistency problem of a plurality of sets of vibration test systems, the system takes the acceleration sensor as a calibration device, and utilizes the characteristic that factory calibration curves of the acceleration sensor are basically consistent, so that the amplitude of the vibration table can be calibrated as long as the acceleration curve obtained in the vibration test system is regulated to be consistent with the factory calibration curve, therefore, the consistency is met among the plurality of sets of vibration test systems which are qualified by debugging according to the method, the difference among the plurality of sets of vibration test systems is solved, the vibration test systems are convenient to copy, the requirement of batch test of a production line is met, and the system has high market application value.
2. Under production line operational environment, local oscillation test system places alone, can reduce external environment to the interference of test. The base for placing the vibrating table uses the marble horizontal plane with heavy weight as a support, so that the vibration influence of the external environment on the machine table is avoided.
3. The system is simple to operate, high in working stability and high in testing accuracy, and the error between all vibration testing systems is 0.3dBV in the full-frequency band range.
4. The vibration test system has high working efficiency, and 300 earphones can be tested in each hour.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a vibration testing system of an earphone voice pickup sensor according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a vibration testing system of an earphone voice pickup sensor according to the present invention.
Fig. 3 is a schematic working flow diagram of a vibration testing method for an earphone voice pickup sensor according to the present invention.
Wherein: 1-a vibration table, 2-an acceleration sensor, 3-an earphone mounting seat, 4-an earphone and 5-a base.
Detailed Description
Examples
As shown in fig. 1, fig. 2 and fig. 3, a vibration testing system for a voice pickup sensor of an earphone comprises a base 5, an upper computer capable of sending a control command, a vibration table 1 and an acceleration sensor 2 installed on the vibration table 1; the system also comprises an acoustic card, an adaptive amplifier and a power amplifier which support the CCLD power supply system, wires for connection and the like. The vibration table 1 is mounted on a base 5, and the mass of the base 5 is not less than 200 kg. The base 5 preferred in this embodiment is a marble base. The base 5 is used to ensure adjustment of the installation level of the vibration table 1 and to block external interference. When the earphone voice pickup sensor is tested, the test result can be influenced by external vibration interference, so that the weight of the marble platform is generally not less than 200 kilograms.
The sound card receives signals transmitted by the upper computer and outputs the signals to the power amplifier, and the power amplifier amplifies the signals transmitted by the sound card and then drives the vibration table 1 to vibrate. The acceleration sensor 2 is installed at the center of the vibration table 1.
The vibration testing system further comprises an earphone mounting seat 3 arranged on the vibration table 1 and a Bluetooth adapter or a data line used for establishing communication between the upper computer and the Bluetooth earphone, and the Bluetooth adapter is preferably used in the implementation. When the vibration table 1 vibrates, the acceleration sensor 2 and the earphone to be tested are driven to vibrate together.
As shown in fig. 3, the functions of the parts in the present technical solution are described as follows: the preferred host computer is a computer capable of directly sending control commands, the functions of the computer send instructions to the automatic control module through serial port communication to adjust the earphone mounting seat 3, then the communication is established with the earphone through the Bluetooth adapter and the instructions are sent to the earphone, and the earphone returns test data to the host computer through the Bluetooth adapter after receiving the instructions. The vibration table provides a vibration source for the voice sensor and the acceleration sensor of the earphone. The acceleration sensor uses the output frequency response curve to calibrate the output of the vibration table. The sound card has two functions: firstly, receiving a signal transmitted by an adaptive amplifier and transmitting the signal to an upper computer; and secondly, receiving the signal transmitted by the upper computer and outputting the signal to the power amplifier. The adaptive amplifier provides power supply for the acceleration sensor and transmits the signal fed back by the acceleration sensor to the sound card. The power amplifier receives the sinusoidal signal sent by the sound card and is used for driving the vibration table after amplification. The Bluetooth adapter is a Bluetooth function interface of a USB interface and is used for establishing communication between the upper computer and the Bluetooth headset. The earphone mounting seat 3 is used for placing earphones, and the shape of the earphone mounting seat can be adjusted to simulate the shapes of different earphones. The working principle is as follows: and placing the earphone 4 on the earphone mounting seat 3, and calibrating the machine table to enable the output curve of the acceleration sensor to be consistent with the original factory calibration curve. The host computer passes through the bluetooth adapter and realizes the communication with the earphone, through 1 action of host computer control shaking table. The voice pickup sensor on the earphone feeds back test data to the upper computer, so that the test of the voice pickup sensor is realized. The adaptive amplifier provides power for the acceleration sensor 2 and transmits a signal fed back by the acceleration sensor 2 to the sound card, and the sound card receives the signal transmitted by the adaptive amplifier and transmits the signal to the upper computer.
As shown in fig. 3, the vibration testing method for the earphone voice pickup sensor by using the earphone voice pickup sensor vibration testing system comprises the following steps:
s0, system power-on self-test, upper computer, sound card, adjusting amplifier, power amplifier, self-test.
S1, calibrating the vibration test system by using the factory calibration curve of the acceleration sensor 2; s1 includes the steps of:
s101, the upper computer provides an input signal for the power amplifier through the sound card, and the vibration table 1 drives the acceleration sensor 2 to vibrate together;
s102, the acceleration sensor 2 outputs a frequency response curve and feeds the frequency response curve back to an upper computer through an adaptive amplifier and a sound card;
s103, the upper computer compares the frequency response curve output by the acceleration sensor 2 with a factory calibration curve;
s104, if the frequency response curve output by the acceleration sensor 2 is consistent with the factory calibration curve, completing calibration; if the frequency response curve output by the acceleration sensor 2 is inconsistent with the factory calibration curve, changing the power of the input signal of the upper computer to the vibration table 1, and repeating S101 to S103; and completing calibration until the obtained frequency response curve output by the acceleration sensor 2 is consistent with the factory calibration curve.
S2, after the vibration test system is calibrated, the input signal of the upper computer is unchanged, the vibration table 1 continues to vibrate, the earphone to be tested is placed on the earphone mounting seat 3, and the position of the earphone placed in the earphone mounting seat 3 is ensured to be consistent each time; the earphone establishes communication with an upper computer through a Bluetooth adapter or a wired mode, and the vibration table 1 acts to provide a vibration source for the Bluetooth earphone; and outputting a frequency response curve to the upper computer by the voice pickup sensor of the earphone to be tested. In the step, the acceleration sensor still transmits a frequency response curve to an upper computer, the upper computer judges whether the curve output by the acceleration sensor is consistent with a calibrated curve through software, and if the curve is beyond a specification range, the system is calibrated again. The alarm is set in the upper computer for reminding, which is a common technical means in the prior art, belongs to the prior art, and is not repeated herein.
And S3, the upper computer analyzes and processes the frequency response curve output by the earphone voice pickup sensor and judges the test result. The frequency response curve output by the earphone voice pickup sensor is analyzed and processed according to the IEEE or IEC standard, and the method belongs to the prior art and is not repeated herein.
S4, the tested earphone is taken down, and the step S2 and the step S3 are repeated, so that other earphones can be tested.
In S101, the input signal provided by the upper computer to the power amplifier through the sound card is a sine frequency conversion curve, or a cosine frequency conversion curve may be used.
In order to ensure that the acceleration sensor used in the system is a qualified product, the acceleration sensor can be tested, namely the acceleration sensor needs to detect a special standard vibration source for the acceleration sensor before being installed in a vibration testing system, each acceleration sensor has a delivery specification, the inside of each acceleration sensor has a 1KHz sensitivity corresponding to a delivery number, and a frequency response curve is output. If the sensitivity of 1KHz is inconsistent with the specification, the acceleration sensor is unqualified and can not be used. After the sensitivity of the acceleration sensor is consistent with the specification detection, the acceleration sensor is placed in a vibration testing system to carry out sensitivity detection by using a 1KHZ sinusoidal signal, the amplitude of an input signal is adjusted, and the 1KHz sensitivity of the acceleration sensor is consistent with the specification.
The output calibration method of the acceleration sensor comprises the step of firstly placing the tested acceleration sensor on the earphone mounting seat 3 of the system, so that the output calibration method is consistent with the actual production test environment of the earphone to be tested. And then, opening the vibration test system for carrying out a first test, obtaining a test curve of the acceleration sensor by test software, if the curve is greatly different from an original factory calibration curve of the acceleration sensor, carrying out amplitude compensation on the curve obtained by the acceleration sensor by the test software, sending the curve to a sound card, transmitting the curve to a power amplifier by using the sound card as an input source, carrying out the test again, and if the acceleration sensor is qualified, obtaining the curve of the acceleration sensor on the test software and being consistent with the factory curve. If there is a slight difference, the power of the input curve can be changed and the above process can be repeated for a plurality of times until the curve meeting the requirement is obtained. This completes the output calibration of the acceleration sensor. If the curve consistent with the factory curve is not obtained, the acceleration sensor is unqualified and can not be used.
In conclusion, the vibration test system and the vibration test method for the earphone voice pickup sensor, provided by the invention, utilize the acceleration sensor to calibrate the vibration amplitude of the vibration table 1, solve the problem that the vibration table 1 among a plurality of sets of vibration test systems has inconsistent amplitude under the same frequency, facilitate the copying of the vibration test system, have the advantages of accurate test result, high test efficiency, good system stability and the like, and can meet the requirement of batch test of a production line; the method is particularly suitable for testing the bone conduction earphone with high precision requirement on the voice pickup sensor.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an earphone pronunciation pick-up sensor vibration test system which characterized in that: the device comprises an upper computer capable of sending an operation command, a vibration table (1) and an acceleration sensor (2) arranged on the vibration table (1); the system also comprises a sound card, an adaptive amplifier and a power amplifier; the sound card receives a signal transmitted by the upper computer and outputs the signal to the power amplifier, and the power amplifier amplifies the signal transmitted by the sound card and then drives the vibration table (1) to vibrate; the adaptive amplifier provides power for the acceleration sensor (2) and transmits a signal fed back by the acceleration sensor (2) to the sound card, and the sound card receives the signal transmitted by the adaptive amplifier and transmits the signal to the upper computer.
2. The earpiece voice pick-up sensor vibration testing system of claim 1, wherein: the acceleration sensor (2) is arranged at the central position of the vibration table (1).
3. The earpiece voice pick-up sensor vibration testing system of claim 1, wherein: the vibration testing system further comprises an earphone mounting seat (3) arranged on the vibration table (1).
4. The earpiece voice pick-up sensor vibration testing system of claim 1, wherein: the vibration test system also comprises a Bluetooth adapter or a data line for establishing communication between the upper computer and the Bluetooth headset.
5. The earpiece voice pick-up sensor vibration testing system of claim 2, wherein: the vibration table (1) is arranged on the base (5), and the mass of the base (5) is not less than 200 kg.
6. The earpiece voice pick-up sensor vibration testing system of claim 5, wherein: the base (5) is a marble base.
7. A vibration test method for an earphone voice pickup sensor is characterized by comprising the following steps:
s1, calibrating the vibration test system by using the factory calibration curve of the acceleration sensor (2);
s2, outputting a frequency response curve to an upper computer by a voice pickup sensor of the earphone to be tested;
and S3, the upper computer analyzes and processes the frequency response curve output by the earphone voice pickup sensor and judges the test result.
8. The headset voice pickup sensor vibration testing method as claimed in claim 7, wherein said S1 comprises the steps of:
s101, the upper computer provides an input signal for the power amplifier through the sound card, and the vibration table (1) drives the acceleration sensor (2) to vibrate together;
s102, outputting a frequency response curve by the acceleration sensor (2) and feeding back the frequency response curve to an upper computer through an adaptive amplifier and a sound card;
s103, comparing a frequency response curve output by the acceleration sensor (2) with a factory calibration curve by the upper computer;
s104, if the frequency response curve output by the acceleration sensor (2) is consistent with the factory calibration curve, completing calibration; if the frequency response curve output by the acceleration sensor (2) is inconsistent with the factory calibration curve, changing the power of the input signal of the upper computer to the vibration table (1), and repeating S101 to S103; and completing calibration until the obtained frequency response curve output by the acceleration sensor (2) is consistent with the factory calibration curve.
9. The headset voice pickup sensor vibration testing method of claim 8, further comprising: and S101, an input signal provided by the upper computer to the power amplifier through the sound card is a sine frequency conversion curve.
10. The headset voice pickup sensor vibration testing method of claim 7, further comprising: and S2, after the vibration test system is calibrated, the input signal of the upper computer is unchanged, and a frequency response curve output by the voice pickup sensor of the earphone to be tested on the vibration table (1) is collected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330905.5A CN112714392A (en) | 2021-03-29 | 2021-03-29 | Vibration test system and vibration test method for earphone voice pickup sensor |
| CN202210120104.0A CN114449432A (en) | 2021-03-29 | 2022-02-09 | Vibration test system and vibration test method for earphone voice pickup sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330905.5A CN112714392A (en) | 2021-03-29 | 2021-03-29 | Vibration test system and vibration test method for earphone voice pickup sensor |
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| CN112714392A true CN112714392A (en) | 2021-04-27 |
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| CN202110330905.5A Withdrawn CN112714392A (en) | 2021-03-29 | 2021-03-29 | Vibration test system and vibration test method for earphone voice pickup sensor |
| CN202210120104.0A Withdrawn CN114449432A (en) | 2021-03-29 | 2022-02-09 | Vibration test system and vibration test method for earphone voice pickup sensor |
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| CN202210120104.0A Withdrawn CN114449432A (en) | 2021-03-29 | 2022-02-09 | Vibration test system and vibration test method for earphone voice pickup sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113382349A (en) * | 2021-06-30 | 2021-09-10 | 歌尔科技有限公司 | Calibration method and device of test device and computer readable storage medium |
| CN113473347A (en) * | 2021-06-30 | 2021-10-01 | 歌尔科技有限公司 | Method and device for testing bone conduction sensor on product |
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| CN101674520A (en) * | 2009-03-30 | 2010-03-17 | 东莞泉声电子有限公司 | Method and device for analyzing and testing parameter of vibration type pickup |
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| US10133358B1 (en) * | 2016-06-01 | 2018-11-20 | Google Llc | Fitting detection for a bone conduction transducer (BCT) using an inertial measurement unit (IMU) sensor |
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| CN111065035A (en) * | 2019-12-25 | 2020-04-24 | 厦门盈趣科技股份有限公司 | Bone conduction earphone testing method and testing system |
| CN111565354A (en) * | 2020-05-26 | 2020-08-21 | 北京瑞森新谱科技股份有限公司 | Testing method and testing system for bone conduction earphone |
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- 2021-03-29 CN CN202110330905.5A patent/CN112714392A/en not_active Withdrawn
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| CN101674520A (en) * | 2009-03-30 | 2010-03-17 | 东莞泉声电子有限公司 | Method and device for analyzing and testing parameter of vibration type pickup |
| WO2014045123A2 (en) * | 2012-09-24 | 2014-03-27 | Actiwave Ab | Control and protection of loudspeakers |
| US10133358B1 (en) * | 2016-06-01 | 2018-11-20 | Google Llc | Fitting detection for a bone conduction transducer (BCT) using an inertial measurement unit (IMU) sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113382349A (en) * | 2021-06-30 | 2021-09-10 | 歌尔科技有限公司 | Calibration method and device of test device and computer readable storage medium |
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| CN113473347B (en) * | 2021-06-30 | 2022-12-02 | 歌尔科技有限公司 | Method and device for testing bone conduction sensor on product |
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| Publication number | Publication date |
|---|---|
| CN114449432A (en) | 2022-05-06 |
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Application publication date: 20210427 |