CN111050263A - Microphone load impedance testing system and method - Google Patents
Microphone load impedance testing system and method Download PDFInfo
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- CN111050263A CN111050263A CN201911083673.7A CN201911083673A CN111050263A CN 111050263 A CN111050263 A CN 111050263A CN 201911083673 A CN201911083673 A CN 201911083673A CN 111050263 A CN111050263 A CN 111050263A
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- 101000836337 Homo sapiens Probable helicase senataxin Proteins 0.000 description 2
- 101000615747 Homo sapiens tRNA-splicing endonuclease subunit Sen2 Proteins 0.000 description 2
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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
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Abstract
The invention provides a microphone load impedance test system and a method thereof, wherein the system comprises a setting module, a test module and a data processing module which are connected in sequence; the setting module is used for setting parameters and test condition information of a signal source of the test module; the testing module is used for detecting the sensitivity of the microphone to be detected in different load impedance circuits and determining the load impedance range of the microphone to be detected based on the sensitivity; and the data processing module is used for exporting and saving the sensitivity. The invention can improve the efficiency and accuracy of the microphone load impedance test.
Description
Technical Field
The invention relates to the technical field of acoustic product testing, in particular to a microphone load impedance testing system and method.
Background
With the progress of society and the development of technology, in recent years, the volume of electronic products such as mobile phones and notebook computers is decreasing, and the performance requirements of people on the portable electronic products are increasing, so that the volume, performance and consistency of electronic parts matched with the portable electronic products are also required to be improved. Therefore, microphones are applied to electronic products such as mobile phones and notebook computers in batches, and in order to ensure that the performance of microphone products meets the production requirements, the performance of microphones needs to be detected in the production process.
When testing microphone load impedance in the current laboratory, it is necessary to manually record the test value of the AP analyzer, and then calculate the load impedance from the measured value. It has the following disadvantages: the same product needs to read the test value twice manually and switch the circuit once, so that the test efficiency is low; the AP analyzer is not provided with software, and needs to be connected in parallel to enter a circuit, so that the reading accuracy of a test result is limited by the subjective consciousness of a person, and the test result is influenced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a system and a method for testing microphone load impedance, so as to solve the problems of low testing efficiency and insufficient accuracy during the testing process of the current microphone load impedance.
The invention provides a microphone load impedance test system, which comprises a setting module, a test module and a data processing module which are connected in sequence; the setting module is used for setting parameters and test condition information of a signal source of the test module; the testing module is used for detecting the sensitivity of the microphone to be detected in different load impedance circuits and determining the load impedance range of the microphone to be detected based on the sensitivity; and the data processing module is used for exporting and saving the sensitivity.
In addition, it is preferable that the test module includes a first detection circuit and a second detection circuit that are switchable with each other; the testing module is used for acquiring the first sensitivity of the microphone to be tested in the first detection circuit and the second sensitivity of the microphone to be tested in the second detection circuit; and judging whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
Further, it is preferable that when the difference between the first sensitivity and the second sensitivity is within a preset range, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range is satisfactory.
In addition, the preferable scheme is that the device further comprises a judging module; the judging module is used for judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range; when the difference value is within a preset range, the sensitivity is led out through the data processing module; otherwise, errors are re-detected or fed back.
In addition, the preferable scheme is that the device further comprises an output display module; the output display module is used for displaying the load impedance and the judgment result of the judgment module in real time.
The invention also provides a microphone load impedance test method, which utilizes the microphone load impedance test system to carry out load impedance test on the microphone; the method comprises the following steps: according to the testing requirement of the microphone to be tested, parameters and testing condition information of a signal source of the testing module are set through the setting module; acquiring the sensitivity of a microphone to be detected through a testing module based on the parameters and testing conditions of a signal source so as to determine the load impedance range of the microphone to be detected according to the sensitivity; and the sensitivity is exported and stored by the data processing module.
In addition, the preferable scheme is that the process of acquiring the sensitivity of the microphone to be detected through the testing module comprises the following steps: the test module comprises a first detection circuit and a second detection circuit which can be switched with each other; acquiring the first sensitivity of a microphone to be detected in a first detection circuit, and acquiring the second sensitivity of the microphone to be detected in a second detection circuit after switching the circuits; and determining whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
Further, it is preferable that when the difference between the first sensitivity and the second sensitivity is within a preset range, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range is satisfactory.
In addition, the preferable scheme is that the method further comprises a judging process; judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range; when the difference value is within a preset range, the sensitivity is led out through the data processing module; otherwise, errors are re-detected or fed back.
In addition, the preferable scheme is that the device further comprises an output display module; the output display module is used for displaying the load impedance range and the judgment result of the judgment module in real time.
By using the system and the method for testing the load impedance of the microphone, the sensitivity of the microphone is detected with high precision through the testing module, so that the load impedance range of a product is determined according to the sensitivity; in addition, the signal source can be set according to the test requirement of the product, the test result can be read quickly, and the method is wide in application range, high in test speed and high in precision.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a logic block diagram of a microphone load impedance testing system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for testing a load impedance of a microphone according to an embodiment of the present invention;
fig. 3 is a detailed flowchart of a microphone load impedance testing method according to an embodiment of the invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
In order to solve the problems that the testing speed is low, the precision is low and the like caused by the fact that the existing microphone load impedance testing is mainly manually intervened, the invention provides a microphone load impedance testing system and a microphone load impedance testing method.
To describe the microphone load impedance testing system and method of the present invention in detail, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a logic diagram of a microphone load impedance testing system according to an embodiment of the invention.
As shown in fig. 1, a microphone load impedance testing system 10 according to an embodiment of the present invention includes a setting module, a testing module, and a data processing module, which are connected in sequence; the setting module is used for setting parameters and test condition information of a signal source of the test module, so that test errors caused by manual adjustment can be avoided, and the signal source impedance test module is suitable for impedance tests of products of more models by setting the parameters and the test condition information of the signal source; the testing module is used for detecting the sensitivity of the microphone to be tested in different load impedance circuits and determining the load impedance range of the microphone to be tested based on the sensitivity, and the testing process can directly acquire and output a testing result, so that the subjective consciousness of manually reading testing data is eliminated, and the testing efficiency and accuracy are improved; the data processing module is used for exporting the sensitivity and storing the sensitivity into a corresponding test file, and is more efficient and accurate compared with manual single recording of data.
Specifically, the test module further comprises a first detection circuit and a second detection circuit which can be switched with each other; the testing module is used for acquiring the first sensitivity of the microphone to be detected in the first detection circuit, then switching the first detection circuit and the second detection circuit and acquiring the second sensitivity of the microphone to be detected in the second detection circuit; and finally, judging whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
When the difference value between the first sensitivity and the second sensitivity is within a preset range, the load impedance connected to the microphone is satisfactory, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range is satisfactory. Through the sensitivity at different detection circuitry measurement microphones, judge whether the load impedance of product meets the requirements through the fluctuation degree of sensitivity, can avoid the error that artifical detection caused, and the testing result can directly read the demonstration, need not artifical calculation or record etc..
In one embodiment of the present invention, the microphone load impedance testing system further includes a determining module; the judging module is used for judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range; when the difference value is within a preset range, directly exporting the sensitivity or impedance range through a data processing module; otherwise, errors are re-detected or fed back. The impedance of the detection circuit can be set according to the microphone to be detected, and the impedance can be different for different microphone products.
In addition, the microphone load impedance testing system may further include an output display module; the output display module is used for displaying the sensitivity of the product or the range of the load impedance and the judgment result of the judgment module in real time, for example, the output display module can directly display the numerical range of the load impedance of the product, and can visually display whether the test result meets the requirement.
It should be noted that the test module may be an existing AP instrument (audio precison).
Corresponding to the microphone load impedance test system, the invention also provides a microphone load impedance test method, which is used for carrying out load impedance test on the microphone by using the microphone load impedance test system. Specifically, fig. 2 and 3 respectively show the flow of the microphone load impedance testing method according to the embodiment of the present invention from different angles.
As shown in fig. 2 and fig. 3, the method for testing the load impedance of a microphone according to the embodiment of the present invention includes:
s110: according to the testing requirement of the microphone to be tested, parameters and testing condition information of a signal source of the testing module are set through the setting module;
s120: acquiring the sensitivity of a microphone to be detected through a testing module based on the parameters and testing conditions of a signal source so as to determine the load impedance range of the microphone to be detected according to the sensitivity;
s130: and exporting the sensitivity through the data processing module and storing the sensitivity into a corresponding test file.
Specifically, the test module further comprises a first detection circuit and a second detection circuit which can be switched with each other; the testing module is used for acquiring the first sensitivity of the microphone to be detected in the first detection circuit, then switching the first detection circuit and the second detection circuit and acquiring the second sensitivity of the microphone to be detected in the second detection circuit; and finally, judging whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
When the difference value between the first sensitivity and the second sensitivity is within a preset range, the load impedance connected to the microphone is satisfactory, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range is satisfactory. Different load circuits are switched according to requirements, the sensitivity of the microphone is measured through different detection circuits, whether the load impedance of the product meets requirements or not is judged through the fluctuation degree of the sensitivity, errors caused by manual detection can be avoided, the detection result can be directly read and displayed, and manual calculation or recording and the like are not needed.
In one embodiment of the present invention, the microphone load impedance testing system further includes a determining module; the judging module is used for judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range; when the difference value is within a preset range, directly exporting the sensitivity or impedance range through a data processing module; otherwise, errors are re-detected or fed back. The impedance of the detection circuit can be set according to the microphone to be detected, and the impedance can be different for different microphone products.
In addition, the microphone load impedance testing system may further include an output display module; the output display module is used for displaying the sensitivity of the product or the range of the load impedance and the judgment result of the judgment module in real time, for example, the output display module can directly display the numerical range of the load impedance of the product, and can visually display whether the test result meets the requirement.
As a specific example, the method for testing the output impedance of the microphone according to the embodiment of the present invention is as follows:
1. the tester sets the frequency of the signal source required by the test to be 1KHz and the sound pressure level to be 94dBSPL through the setting module, and then clicks a 'setting' button in the setting module to complete the setting of the parameters and the test conditions of the test signal source.
2. Clicking the 'start' button in the test module, connecting the test module to the circuit where the microphone to be tested is located, and reading the sensitivity SEN1 of the microphone.
3. Different load circuits are switched according to requirements, then the sensitivity SEN2 of the microphone is read, the difference value of the sensitivity SEN1 and the sensitivity SEN2 is calculated, and when the difference value is within a preset range, the load impedance connected with the microphone is in accordance with the requirement.
4. And displaying the test result of the output impedance through an output display module.
5. And the processing module judges the test result of the output impedance, directly derives and stores the data when the test result meets the requirement, and otherwise, returns an error or detects again.
It should be noted that the test module may be an existing AP instrument (audio precison).
In conclusion, the microphone load impedance test system and the microphone load impedance test method provided by the invention can quickly and directly read the test result of a product, the accuracy of the read value is not interfered by human, and the test result is accurate and reliable; in addition, the product testing efficiency is high, and the method is applicable to performance testing of various products.
The microphone load impedance test system and method according to the present invention are described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the microphone load impedance testing system and method of the present invention without departing from the spirit or scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. A microphone load impedance test system is characterized by comprising a setting module, a test module and a data processing module which are sequentially connected; wherein,
the setting module is used for setting parameters and test condition information of a signal source of the test module;
the testing module is used for detecting the sensitivity of the microphone to be detected in different load impedance circuits and determining the load impedance range of the microphone to be detected based on the sensitivity;
and the data processing module is used for exporting and saving the sensitivity.
2. The microphone load impedance testing system of claim 1,
the test module comprises a first detection circuit and a second detection circuit which can be switched with each other;
the testing module is used for acquiring the first sensitivity of the microphone to be detected in the first detection circuit and the second sensitivity of the microphone to be detected in the second detection circuit;
and judging whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
3. The microphone load impedance testing system of claim 2,
when the difference value between the first sensitivity and the second sensitivity is within a preset range, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range meets the requirement.
4. The microphone load impedance testing system of claim 3, further comprising a determination module; wherein,
the judging module is used for judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range;
when the difference value is within the preset range, the sensitivity is led out through the data processing module; otherwise, errors are re-detected or fed back.
5. The microphone load impedance testing system of claim 4, further comprising an output display module; wherein,
and the output display module is used for displaying the load impedance and the judgment result of the judgment module in real time.
6. A microphone load impedance testing method, characterized in that a microphone is subjected to a load impedance test by using the microphone load impedance testing system according to any one of claims 1 to 5; wherein the method comprises the following steps:
according to the testing requirement of the microphone to be tested, parameters and testing condition information of a signal source of the testing module are set through the setting module;
acquiring the sensitivity of the microphone to be detected through the testing module based on the parameters and the testing conditions of the signal source so as to determine the load impedance range of the microphone to be detected according to the sensitivity;
and exporting and storing the sensitivity through a data processing module.
7. The method for testing the load impedance of the microphone as claimed in claim 6, wherein the step of acquiring the sensitivity of the microphone to be tested through the testing module comprises the steps of:
the test module comprises a first detection circuit and a second detection circuit which can be switched with each other;
acquiring the first sensitivity of the microphone to be detected in the first detection circuit, and acquiring the second sensitivity of the microphone to be detected in the second detection circuit after the circuit is switched;
and determining whether the load impedance range of the microphone to be detected meets the requirement or not based on the difference value of the first sensitivity and the second sensitivity.
8. The microphone load impedance testing method as claimed in claim 7,
when the difference value between the first sensitivity and the second sensitivity is within a preset range, the load impedance range of the microphone corresponds to the impedance in the first detection circuit and the second detection circuit, and the load impedance range meets the requirement.
9. The microphone load impedance testing method as claimed in claim 8, further comprising a judgment process; wherein,
judging whether the difference value of the first sensitivity and the second sensitivity is within a preset range;
when the difference value is within the preset range, the sensitivity is led out through the data processing module; otherwise, errors are re-detected or fed back.
10. The microphone load impedance testing method of claim 6, further comprising outputting a display module; wherein,
and the output display module is used for displaying the load impedance range and the judgment result of the judgment module in real time.
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| J. WANG, A. J. DANCY AND D. S. HA: "Vibration Energy Harvesting Circuit with Impedance Matching and Wake-up for Freight Railcars", 《IECON 2018 - 44TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY》 * |
| 廖建新: "浅谈阻抗匹配", 《探索·争鸣》 * |
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