An automatic test device and method for anti-interference ability of audio equipment

Abstract

The present invention relates to the field of anti-interference testing technology, and in particular to an automated testing device and method for the anti-interference capability of an audio device. Interference signal sources are respectively arranged at the four inner corners of a radio frequency shielding room, a test station mechanism is arranged in the middle, a control and test system is arranged outside the radio frequency shielding room, a switching device is arranged on one side of the radio frequency shielding room, the control and test system and the test station mechanism are respectively connected to the switching device through cables to achieve the connection between the control and test system and the test station mechanism, the control and test system includes an interference control system and an audio test system, and the interference control system and the audio test system are connected. Compared with the prior art, the automated testing device and method for the anti-interference capability of an audio device of the present invention will not be interfered by the external disordered and uncontrollable electromagnetic environment during testing, which greatly improves the accuracy and consistency of the test results, and the test results will not be affected by human subjective influence and have strong objectivity.

Description

[Technical field]

[0001] The present invention relates to the technical field of anti-interference testing, and in particular to an automatic testing device and method for the anti-interference capability of an audio device. [Background technology]

[0002] With the popularity of smart wearable devices, more and more wearable devices have the function of wireless communication. It can be said that the quality of wireless communication function is directly related to the user's experience of the product, and among them, audio wearable devices with wireless communication function are particularly obvious. To improve the wireless communication function of the product, on the one hand, the entire RF system and antenna system need to be optimally designed; on the other hand, when external interference occurs, the impact of this interference on the user experience must be effectively reduced. The former already has mature objective testing methods in the industry, but for the latter, most manufacturers currently perform user experience testing through manual subjective testing, which is not only inefficient, but also has great deficiencies in accuracy, and the uncertainty of the test results is high. [Summary of the invention]

[0003] In order to overcome the above problems, the present invention proposes an automatic testing device and method for the anti-interference capability of an audio device which can effectively solve the above problems.

[0004] The present invention provides a technical solution to solve the above technical problems: an automated testing device and method for the anti-interference ability of an audio device are provided, comprising a radio frequency shielding room, a test space is formed inside the radio frequency shielding room, interference signal sources are respectively arranged at the four corners inside the radio frequency shielding room, a test station mechanism is arranged in the middle, a control and test system is arranged outside the radio frequency shielding room, a switching device is arranged on one side of the radio frequency shielding room, the control and test system and the test station mechanism are respectively connected to the switching device through cables to realize the connection between the control and test system and the test station mechanism, the control and test system comprises an interference control system and an audio test system, and the interference control system and the audio test system are connected.

[0005] Preferably, the switching device includes a network filter and a cable switching board, the interference control system and the network filter are respectively connected to the switch through cables, and the audio test system is connected to the cable switching board through cables.

[0006] Preferably, the test station mechanism is connected to a cable adapter plate via a cable to achieve connection with an audio test system.

[0007] Preferably, the interference signal source is connected to a network filter via a cable to achieve connection with an interference control system.

[0008] Preferably, the test station mechanism includes a turntable, which is driven to rotate by a stepper motor. The stepper motor is connected to a cable adapter plate through a cable, and further connected to an audio test system. The audio test system controls the rotation of the turntable.

[0009] Preferably, a plurality of artificial ears are arranged on the turntable, and the artificial ears are connected to a cable adapter plate through cables, and further connected to the audio test system.

[0010] Preferably, a communication adapter is further provided in the radio frequency shielding room, and the communication adapter is connected to a cable adapter plate via a cable, and further connected to the audio test system.

[0011] Preferably, the interference control system includes a main control PC, in which a control module is provided. The control module sets parameters to send instructions to the interference signal source to generate corresponding interference signals.

[0012] Preferably, the automated testing method for the anti-interference capability of an audio device is characterized by comprising the following steps:

[0013] Step S1, before testing, set the frequency band to be tested, the rotation step of the turntable 41, the rotation time slot and number of turns of the turntable 41, the sweep signal and the specifications of each group of interference signals;

[0014] Step S2, connecting the device under test to the artificial ear 42, and configuring a wireless connection with the communication adapter 43;

[0015] Step S3, the audio test system sends a start test instruction to the interference control system, and the interference control system controls the subordinate interference signal source 20 to send a controllable interference signal according to the set interference signal specification. The audio test system also sends an instruction to the turntable 41 to rotate 360° according to the set rotation step and rotation time slot;

[0016] Step S4, the artificial ear 42 monitors and collects the audio test results at each angle, and feeds them back to the audio test system for recording;

[0017] Step S5, when one set of tests is completed, the audio test system automatically issues an instruction to start the second set of standard interference signal tests to the interference control system, and performs the tests again in a cycle of steps 3 and 4 until all the predetermined test contents are completed.

[0018] Step S6: After the test is completed, the test result record file can be retrieved from the audio test system.

[0019] Compared with the prior art, the automatic test device and method for the anti-interference ability of audio equipment of the present invention controls the interference signal generation of the interference signal source, selects different numbers of interference signal sources on the required working frequency band, and customizes different parameters such as transmission power, transmission time slot and transmission duration for each interference signal source, releases interference signals with controllable specifications, and then uses the audio test system, turntable, communication adapter and artificial ear to monitor the device under test, records the test performance of the device under different specifications of interference signals, and generates an objective test report for staff to review, analyze and archive;

[0020] It has the following beneficial effects: 1. Since the test is completed in a radio frequency shielding room, it will not be disturbed by the disordered and uncontrollable electromagnetic environment, which greatly improves the accuracy and consistency of the test results; 2. Artificial ear monitoring replaces real ears, and the test results will not be affected by human subjectivity and are more objective; 3. The test process does not require personnel on duty, and it is automatically completed and records data, which is more intelligent and can greatly improve test efficiency.

Brief Description of the Drawings

[0021] Figure 1 A schematic diagram of the structure of an automated testing device for the anti-interference capability of an audio device according to the present invention;

[0022] Figure 2 A structural block diagram of an automatic testing device for anti-interference capability of an audio device according to the present invention;

[0023] Figure 3 A working flow chart of an automatic testing device for anti-interference capability of an audio device according to the present invention;

[0024] Figure 4 The present invention is a block diagram of the interference signal source structure of an automatic test device for the anti-interference ability of an audio device. [Specific implementation method]

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.

[0027] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] See also Figures 1 to 4 The present invention discloses an automated test device for the anti-interference capability of an audio device, comprising a radio frequency shielding room 10, which is used to isolate external environmental interference and create a test environment without external interference. The radio frequency shielding room 10 is in the shape of a cube, fully enclosed, and forms a test space inside. There is an opening and closing door, which can be opened and closed for people to enter and exit. Interference signal sources 20 are respectively arranged at the four corners of the radio frequency shielding room 10, and a test station mechanism 40 is arranged in the middle. The interference signal source 20 is used to provide interference signals with controllable parameters, and the parameters include but are not limited to transmission power, transmission frequency, transmission time, transmission interval, and the number of antennas and interference signal sources 20 used. A control and test system 30 is arranged outside the radio frequency shielding room 10, and a switching device 50 is arranged on one side of the radio frequency shielding room 10. The control and test system 30 and the test station mechanism 40 are respectively connected to the switching device 50 through cables to realize the connection between the control and test system 30 and the test station mechanism 40. Since the interference signal source 20 is located inside the RF shielding room 10, the interference signal it emits will only propagate, reflect and consume inside the RF shielding room 10, and will not leak to the outside of the RF shielding room 10. Because the control and test system 30 and the test station mechanism 40 are switched through the switching device 50, external signals can be effectively prevented from entering the RF shielding room 10 and causing additional interference, thereby ensuring the accuracy and consistency of the test results.

[0029] The control and test system 30 includes an interference control system and an audio test system, which are connected to each other. The switching device 50 includes a network filter and a cable adapter board, the interference control system and the network filter are connected to the switch via cables, respectively, and the audio test system is connected to the cable adapter board via cables. The test station mechanism 40 is connected to the cable adapter board via cables to achieve connection with the audio test system. The interference signal source 20 is connected to the network filter via cables to achieve connection with the interference control system.

[0030] The test station mechanism 40 includes a turntable 41, which is driven to rotate by a stepper motor, which is connected to a cable adapter plate through a cable, and then connected to an audio test system, and the audio test system controls the rotation of the turntable 41. A plurality of artificial ears 42 are arranged on the turntable 41, which are used to monitor various test results of the DUT during the test process, and the artificial ears 42 are connected to a cable adapter plate through a cable, and then connected to an audio test system, and the audio test system controls the recording of the monitoring results of the artificial ears 42 and the emission of the sweep frequency signal.

[0031] The radio frequency shielding room 10 is also provided with a communication adapter 43, which is connected to the cable adapter board through a cable, and then connected to the audio test system for sending a frequency sweep signal. The frequency sweep signal of the communication adapter 43 is transmitted through its own attached antenna, and wirelessly communicates with the device under test. Specifically, since the device under test operates in the Bluetooth frequency band, the microwave communication frequency band used and controlled by the interference control system, the interference signal source 20 and its attached antenna, and the communication adapter 43 and its attached antenna are all Bluetooth frequency bands, specifically the ISM frequency band of 2.4-2.485GHz.

[0032] The cables mentioned above include power cables and data transmission cables, which can be selected according to different functional requirements.

[0033] The interference control system includes a main control PC, in which a control module is provided. The control module sets parameters to send instructions to the interference signal source 20 to generate corresponding interference signals.

[0034] The interference signal source 20 includes a central chip, a baseband module, a radio frequency module, a power amplifier, a matching circuit and an antenna, and the central chip, the baseband module, the radio frequency module, the power amplifier, the matching circuit and the antenna are connected in sequence. The interference degree of the interference signal source 20 is precisely controlled, mainly relying on the setting parameters of the interference control system control module, sending background instructions to the central chip of the interference signal source 20, first setting the frequency band and time slot of the interference signal, then passing through the baseband module to the radio frequency module, and then amplifying it according to the set gain through the power amplifier, and finally emitting a precisely controllable interference signal from the antenna. The key point of precise control is to control the gain of the power amplifier, and there is a return proofreading function for the power output result to confirm that the gain modification is completed correctly.

[0035] During the test, the device to be tested is placed on the artificial ear 42, and a wireless connection is established with the communication adapter 43 through the Bluetooth protocol. Then, the interference control system is turned on, and the interference signal related parameters of the interference signal source 20 are set. Then, the rotation parameters of the turntable 41, the monitoring parameters of the artificial ear 42, and the sweep signal parameters emitted by the communication adapter 43 are set in the audio test system. Then, the automatic test of the anti-interference ability of the device to be tested can be started. After the test is completed, the test result record file can be retrieved from the audio test system.

[0036] An automated testing method for the anti-interference capability of an audio device comprises the following steps:

[0037] Step S1, before testing, set the frequency band to be tested, the rotation step of the turntable 41, the rotation time slot and number of turns of the turntable 41, the sweep signal and the specifications of each group of interference signals;

[0038] Step S2, connecting the device under test to the artificial ear 42, and configuring a wireless connection with the communication adapter 43;

[0039] Step S3, the audio test system sends a start test instruction to the interference control system, and the interference control system controls the subordinate interference signal source 20 to send a controllable interference signal according to the set interference signal specification. The audio test system also sends an instruction to the turntable 41 to rotate 360° according to the set rotation step and rotation time slot;

[0040] Step S4, the artificial ear 42 monitors and collects the audio test results at each angle, and feeds them back to the audio test system for recording;

[0041] Step S5, when one set of tests is completed, the audio test system automatically issues an instruction to start the second set of standard interference signal tests to the interference control system, and performs the tests again in a cycle of steps 3 and 4 until all the predetermined test contents are completed.

[0042] Step S6: After the test is completed, the test result record file can be retrieved from the audio test system.

[0043] Compared with the prior art, the automatic test device and method for the anti-interference ability of audio equipment of the present invention controls the interference signal generation of the interference signal source 20, selects different numbers of interference signal sources 20 on the required working frequency band, and customizes different parameters such as transmission power, transmission time slot and transmission duration for each interference signal source 20, releases interference signals with controllable specifications, and then uses the audio test system, turntable 41, communication adapter 43 and artificial ear 42 to monitor the device under test, record the test performance of the device under different specifications of interference signals, and generate an objective test report for staff to review, analyze and archive;

[0044] The invention has the following beneficial effects: 1. Since the test is completed in the radio frequency shielding room 10, the test will not be disturbed by the external disordered and uncontrollable electromagnetic environment, which greatly improves the accuracy and consistency of the test results; 2. The artificial ear 42 replaces the real ear, and the test result will not be affected by human subjectivity and is more objective; 3. The test process does not require personnel on duty, and the test is automatically completed and data is recorded, which is more intelligent and can greatly improve the test efficiency.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any modifications, equivalent substitutions and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.

Claims

1. An automated test device for the anti-interference capability of an audio device, characterized in that: It comprises a radio frequency shielding room, wherein a test space is formed inside the radio frequency shielding room, interference signal sources are respectively arranged at the four corners inside the radio frequency shielding room, a test station mechanism is arranged in the middle, a control and test system is arranged outside the radio frequency shielding room, a switching device is arranged on one side of the radio frequency shielding room, and the control and test system and the test station mechanism are respectively connected to the switching device through cables to realize the connection between the control and test system and the test station mechanism; The control and test system comprises an interference control system and an audio test system, and the interference control system and the audio test system are connected; The interference control system includes a main control PC, in which a control module is provided, and the control module sets parameters to send instructions to the interference signal source to generate a corresponding interference signal; The interference signal source includes a central chip, a baseband module, a radio frequency module, a power amplifier, a matching circuit and an antenna, and the central chip, the baseband module, the radio frequency module, the power amplifier, the matching circuit and the antenna are connected in sequence; The switching device includes a network filter and a cable switching board, the interference control system and the network filter are respectively connected to the switch through cables, and the audio test system is connected to the cable switching board through cables; The test station mechanism includes a turntable, which is driven to rotate by a stepper motor, and the stepper motor is connected to a cable adapter plate through a cable, and then connected to an audio test system, and the audio test system controls the rotation of the turntable; A plurality of artificial ears are arranged on the turntable, and the artificial ears are connected to the cable adapter plate through cables, and then connected to the audio test system.

2. The automatic test device for the anti-interference ability of an audio device as claimed in claim 1, characterized in that: The test station mechanism is connected to the cable adapter plate via a cable to achieve connection with the audio test system.

3. The automatic test device for the anti-interference capability of an audio device according to claim 1, characterized in that: The interference signal source is connected to the network filter through a cable to achieve connection with the interference control system.

4. The automatic testing device for the anti-interference capability of an audio device as claimed in claim 1, characterized in that: A communication adapter is also provided in the radio frequency shielding room. The communication adapter is connected to a cable adapter plate through a cable, and further connected to the audio test system.

5. An automated testing method for the anti-interference capability of an audio device, characterized in that: The steps include: Step S1, before testing, set the frequency band to be tested, the rotation step of the turntable 41, the rotation time slot and number of turns of the turntable 41, the sweep signal and the specifications of each group of interference signals; Step S2, connecting the device under test to the artificial ear 42, and configuring a wireless connection with the communication adapter 43; Step S3, the audio test system sends a start test instruction to the interference control system, and the interference control system controls the subordinate interference signal source 20 to send a controllable interference signal according to the set interference signal specification. The audio test system also sends an instruction to the turntable 41 to rotate 360° according to the set rotation step and rotation time slot; Step S4, the artificial ear 42 monitors and collects the audio test results at each angle, and feeds them back to the audio test system for recording; Step S5, when one set of tests is completed, the audio test system automatically issues an instruction to start the second set of standard interference signal tests to the interference control system, and the tests are repeated in the cycle of steps 3 and 4 until all the predetermined test contents are completed; Step S6: After the test is completed, the test result record file can be retrieved from the audio test system.

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