Audio module testing device
By designing an audio module testing device and connecting the test module with the input/output components, the device automatically compares signals, solving the inconsistencies and high costs caused by manual testing, and achieving efficient and accurate audio module testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUECTEL WIRELESS SOLUTIONS CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-21
AI Technical Summary
In existing technologies, audio module testing relies on manual operation, which leads to inconsistent and unobjective test results, low production efficiency, and high costs.
Design an audio module testing device that connects the test module to the input and output components, transmits and compares signals using a test link, and generates an indication signal to indicate whether the audio module has a fault.
It achieves efficient and accurate automated testing, saving human resources and reducing production costs.
Smart Images
Figure CN224538310U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of signal processing technology, and more specifically, to an audio module testing device. Background Technology
[0002] In today's rapidly developing electronics manufacturing industry, audio modules, as core components of audio equipment, directly determine the performance and user experience of end products through their audio output quality. After production, audio modules require comprehensive and precise functional testing to ensure product quality.
[0003] Currently, testing of audio modules on the production line still mainly relies on manual operation. The specific process is as follows: the tester connects the output waveform of the audio module to an oscilloscope via a connecting cable, then manually adjusts various parameters of the oscilloscope to make the waveform clearly and stably displayed on the screen. Finally, the tester judges whether the performance of the audio module meets the standards by visually observing the difference between the output waveform and the original input waveform.
[0004] However, this manual audio testing method has many drawbacks, severely restricting production efficiency and testing accuracy. First, manual operation is limited by individual skill levels and work conditions. Different testers have different standards for adjusting oscilloscope parameters and judging waveforms, resulting in inconsistent and unobjective test results. Furthermore, manual testing requires a large investment of human resources, increasing production costs. Utility Model Content
[0005] The purpose of this application is to provide an audio module testing device to address the shortcomings of the prior art, thereby solving the problems of low accuracy and high production cost in the prior art.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this application provides an audio module testing device, which includes an audio module under test, a test link, and a test module. The audio module includes an input component and an output component. The test module is connected to both the input component and the output component. The output terminal of the output component is connected to the first terminal of the test link, and the second terminal of the test link is connected to the input terminal of the input component. The first signal generated by the audio module is transmitted to the input component via the output component and the test link, so as to output a second signal from the input component; The test module is used to compare the first signal and the second signal, generate and output an indication signal, which is used to indicate whether the audio module has a fault.
[0007] Optionally, the test link includes: a first transmission module, a second transmission module, a third transmission module, a fourth transmission module, and a fifth transmission module; The input terminal of the first transmission module is connected to the output terminal of the output component, and the output terminal of the first transmission module is connected to the first input terminal of the third transmission module. The first transmission module is used to receive the left channel audio signal and the right channel audio signal of the headphones, and select and output the left channel audio signal or the right channel audio signal of the headphones based on the control signal. The input terminal of the second transmission module is connected to the output terminal of the output component, and the output terminal of the second transmission module is connected to the second input terminal of the third transmission module. The second transmission module is used to receive speaker signals and communication device audio signals, and select and output speaker signals or communication device audio signals based on control signals. The output terminal of the third transmission module is connected to the input terminal of the fourth transmission module. The third transmission module is used to select and output the signals output by the first transmission module and the second transmission module based on the control signal. The first output terminal of the fourth transmission module is connected to the first input terminal of the input component, and the second output terminal of the fourth transmission module is connected to the input terminal of the fifth transmission module. The fourth transmission module is used to select the signal output by the third transmission module based on the control signal and output it to the input component or the fifth transmission module. The first output terminal of the fifth transmission module is connected to the second input terminal of the input component, and the second output terminal of the fifth transmission module is connected to the third input terminal of the input component. The fifth transmission module is used to select and output the signal output by the fourth transmission module to the second or third input terminal of the input component based on the control signal.
[0008] Optionally, the first transmission module includes a first switch and a second switch; The first terminal of the first switch is connected to the left channel audio signal of the headphones, the second terminal of the first switch is connected to the right channel audio signal of the headphones, and the third terminal of the first switch is connected to the first input terminal of the third transmission module. The first terminal of the second switch is connected to the ground audio signal of the left channel of the earphone, the second terminal of the second switch is connected to the ground audio signal of the right channel of the earphone, and the third terminal of the second switch is connected to the second input terminal of the third transmission module. The control terminals of the first switch and the second switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminal of the first switch and the first terminal of the second switch, or to simultaneously turn on the second terminal of the first switch and the second terminal of the second switch.
[0009] Optionally, the second transmission module includes a third switch and a fourth switch; The first end of the third switch is connected to a positive signal from the speaker, the second end of the third switch is connected to a positive audio signal from the communication device, and the third end of the third switch is connected to the third input end of the third transmission module. The first terminal of the fourth switch is connected to the negative signal of the speaker, the second terminal of the fourth switch is connected to the negative audio signal of the communication device, and the third terminal of the fourth switch is connected to the fourth input terminal of the third transmission module. The control terminals of the third switch and the fourth switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminals of the third switch and the first terminals of the fourth switch, or to simultaneously turn on the second terminals of the third switch and the second terminals of the fourth switch.
[0010] Optionally, the third transmission module includes a fifth switch and a sixth switch; The first end of the fifth switch is connected to the third end of the first switch in the first transmission module, the second end of the fifth switch is connected to the third end of the third switch in the second transmission module, and the third end of the fifth switch is connected to the first input end of the fourth transmission module. The first end of the sixth switch is connected to the third end of the second switch in the first transmission module, the second end of the sixth switch is connected to the third end of the fourth switch in the second transmission module, and the third end of the sixth switch is connected to the second input end of the fourth transmission module. The control terminal of the fifth switch and the control terminal of the sixth switch are respectively connected to control signals. The control signals are used to make the first terminal of the fifth switch and the first terminal of the sixth switch simultaneously conduct, or to make the second terminal of the fifth switch and the second terminal of the sixth switch simultaneously conduct.
[0011] Optionally, the fourth transmission module includes a seventh switch and an eighth switch; The third terminal of the seventh switch is connected to the third terminal of the fifth switch, the first terminal of the seventh switch is connected to the first positive input terminal of the input component, and the second terminal of the seventh switch is connected to the first input terminal of the fifth transmission module. The third terminal of the eighth switch is connected to the third terminal of the sixth switch, the first terminal of the eighth switch is connected to the first negative input terminal of the input component, and the second terminal of the eighth switch is connected to the second input terminal of the fifth transmission module. The control terminal of the seventh switch and the control terminal of the eighth switch are respectively connected to control signals. The control signals are used to make the first terminal of the seventh switch and the first terminal of the eighth switch simultaneously conduct, or to make the second terminal of the seventh switch and the second terminal of the eighth switch simultaneously conduct.
[0012] Optionally, the fifth transmission module includes a ninth switch and a tenth switch; The third terminal of the ninth switch is connected to the second terminal of the seventh switch, the first terminal of the ninth switch is connected to the second positive input terminal of the input component, and the second terminal of the ninth switch is connected to the third positive input terminal of the input component. The third terminal of the tenth switch is connected to the second terminal of the eighth switch, the first terminal of the tenth switch is connected to the second negative input terminal of the input component, and the second terminal of the tenth switch is connected to the third negative input terminal of the input component. The control terminal of the ninth switch and the control terminal of the tenth switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminal of the ninth switch and the first terminal of the tenth switch, or to simultaneously turn on the second terminal of the ninth switch and the second terminal of the tenth switch.
[0013] Optionally, the audio module testing device further includes: multiple signal processing modules, each including transistors and resistors; The base of the transistor is used to receive the original control signal, the emitter of the transistor is grounded, the collector of the transistor is connected to the control terminal of each transmission module in the test link and the second terminal of the resistor, and the first terminal of the resistor is used to connect the power signal.
[0014] Optionally, the test module includes: a first analog-to-digital conversion unit, a second analog-to-digital conversion unit, and a comparison unit; One end of the first analog-to-digital conversion unit is connected to the output end of the input component, and the other end of the first analog-to-digital conversion unit is connected to the first end of the comparison unit. One end of the second analog-to-digital converter is connected to the input end of the output component, and the other end of the second analog-to-digital converter is connected to the second end of the comparison unit; The third terminal of the comparison unit is used to output an indication signal.
[0015] Optionally, the test module is built into the audio module.
[0016] The beneficial effects of this application are as follows: the test module is connected to the input component and the output component. The output terminal of the output component is connected to the first end of the test link, and the second end of the test link is connected to the input terminal of the input component. The first signal generated by the audio module is transmitted to the input component via the output component and the test link, so that a second signal is output from the input component. The test module is used to compare the first signal and the second signal, generate and output an indication signal, and the indication signal is used to indicate whether the audio module has a fault. This embodiment determines whether the audio module has a fault by comparing the second signal obtained through the test link with the first signal, thereby efficiently outputting the detection result with high detection accuracy. At the same time, the entire testing process does not require manual execution, thus saving human resources and reducing production costs. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of an audio module testing device provided in an embodiment of this application; Figure 2 This is a schematic diagram of a test link structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of each transmission module provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a signal processing module provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a test module provided in an embodiment of this application. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.
[0020] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0021] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.
[0022] In existing technologies, the methods for manual audio testing are not standardized and require a large investment of human resources, which increases production costs and thus restricts production efficiency and testing accuracy.
[0023] Based on this, this application proposes an audio module testing device. In this device, a testing module is connected to the input and output components of the audio module. The output terminal of the output component is connected to the input terminal of the input component via a test link. The audio module generates a first signal and sequentially outputs a second signal via the output component, the test link, and the input component. The testing module compares the first and second signals to generate and output an indication signal indicating whether the audio module has a fault. The entire testing process is completed using the audio module testing device, thus ensuring high efficiency and accuracy while saving manpower and reducing production costs.
[0024] Next, refer to Figure 1 The specific structure of the audio module testing device is described. Figure 1 This is a schematic diagram of the structure of an audio module testing device provided in an embodiment of this application. Optionally, Figure 1An example is given using test module 103 built into audio module 10.
[0025] Optionally, the audio module testing device includes the audio module 10 under test, the test link 20, and the test module 103. The audio module 10 includes an input component 102 and an output component 101.
[0026] The audio module 10 under test can be a speaker, headphones, or a loudspeaker, or it can be a device that integrates the functions of a speaker, headphones, and loudspeaker. This device can output audio signals, headphone signals, and loudspeaker signals. The specific type is not limited in this embodiment.
[0027] Optionally, the test link 20 can be a link composed of multiple transmission modules. The number of modules and their connection relationships in the link can be determined based on the input component 102 and the output component 101 in the audio module 10.
[0028] Optionally, the test module 103 may be a microcontroller unit (MCU) or a test circuit, which may include a comparator and an analog-to-digital converter, etc.
[0029] Optionally, in the audio module 10, the input component 102 may include a power amplifier, a filter, and an input interface, etc., and the output component 101 may include a power amplifier, a filter, and an output interface, etc. The input interface may include a microphone interface, and the output interface may include a communication device audio interface, a speaker interface, a left-channel headphone audio interface, and a right-channel headphone audio interface.
[0030] Optionally, the test module 103 is connected to the input component 102 and the output component 101, respectively.
[0031] Optionally, the output terminal of the output component 101 is connected to the first terminal of the test link 20, and the second terminal of the test link 20 is connected to the input terminal of the input component 102.
[0032] Optionally, the first signal generated by the audio module 10 is transmitted to the input component 102 via the output component 101 and the test link 20, so as to output the second signal from the input component 102.
[0033] Optionally, the audio module 10 may include a signal generation module for generating a first signal and sending the first signal to the input component 102.
[0034] The first signal can be an audio signal from a communication device, a speaker signal, a left-channel audio signal from a headphone, or a right-channel audio signal from a headphone.
[0035] Specifically, the output terminal of the output component 101 is used to output the first signal generated by the audio module 10, and after transmission through the test link 20, it outputs the second signal from the input component 102. The second signal is obtained by transmitting and converting the first signal through the test link 20.
[0036] Optionally, the test module 103 is used to compare the first signal and the second signal, generate and output an indication signal, which is used to indicate whether there is a fault in the audio module 10.
[0037] Optionally, the test module 103 compares the first signal and the second signal. If the first signal and the second signal are the same, it indicates that the audio module 10 is not faulty. If the first signal and the second signal are different, it indicates that the audio module 10 is faulty.
[0038] As an optional implementation, if the audio module 10 fails to output the first signal, or the input component 102 does not receive the second signal, it indicates that the audio module 10 is faulty.
[0039] Optionally, the indicator signal can be a digital signal, in which case a high level indicates a fault in the audio module, and a low level indicates that the audio module is not faulty. The indicator signal can also be an analog signal, and this embodiment does not impose any restrictions on this.
[0040] Optionally, the indicator signal can be connected to a host computer, allowing users to view the test results of the audio module.
[0041] In this embodiment, the test module is connected to the input component and the output component. The output terminal of the output component is connected to the first end of the test link, and the second end of the test link is connected to the input terminal of the input component. The first signal generated by the audio module is transmitted to the input component via the output component and the test link, so that a second signal is output from the input component. The test module compares the first signal and the second signal, generates and outputs an indication signal, which is used to indicate whether the audio module has a fault. This embodiment determines whether the audio module has a fault by comparing the second signal obtained through the test link with the first signal, thereby efficiently outputting the detection results with high accuracy. Furthermore, the entire testing process does not require manual operation, thus saving manpower and reducing production costs.
[0042] As an optional implementation method, Figure 2 This is a schematic diagram of a test link structure provided in an embodiment of this application. Next, refer to... Figure 2 A test link 20 is introduced.
[0043] Optionally, the test link 20 includes: a first transmission module 201, a second transmission module 202, a third transmission module 203, a fourth transmission module 204, and a fifth transmission module 205.
[0044] Optionally, the input terminal of the first transmission module 201 is connected to the output terminal of the output component 101, and the output terminal of the first transmission module 201 is connected to the first input terminal of the third transmission module 203. The first transmission module 201 is used to receive the left channel audio signal and the right channel audio signal of the headphones, and select and output the left channel audio signal or the right channel audio signal of the headphones based on the control signal C.
[0045] Specifically, the input terminal of the first transmission module 201 is connected to the left and right audio interfaces of the headphones in the output component 101, respectively.
[0046] The control signal C is used to control the first transmission module 201 to select and output the input signal. The control signal C can be generated by the control chip included in the audio module 10 or by an external control module; this application does not impose any restrictions on this.
[0047] Optionally, the input terminal of the second transmission module 202 is connected to the output terminal of the output component 101, and the output terminal of the second transmission module 202 is connected to the second input terminal of the third transmission module 203. The second transmission module 202 is used to receive speaker signals and communication device audio signals, and select and output speaker signals or communication device audio signals based on control signal C.
[0048] Optionally, the signal input to the second transmission module 202 may be different from the signal input to the first transmission module 201. Specifically, the input of the second transmission module 202 is connected to the speaker interface and the audio interface of the communication device in the output component 101, respectively.
[0049] Optionally, the control signal C of the second transmission module 202 can be the same as or different from the control signal C of the first transmission module 201, depending on the actual requirements.
[0050] Optionally, the output terminal of the third transmission module 203 is connected to the input terminal of the fourth transmission module 204. The third transmission module 203 is used to select and output the signals output by the first transmission module 201 and the second transmission module 202 based on the control signal C.
[0051] Optionally, the control signal C of the third transmission module 203 can be the same as or different from the control signal C of the first transmission module 201 and the second transmission module 202. The specific setting depends on the actual needs.
[0052] Optionally, the first output terminal of the fourth transmission module 204 is connected to the first input terminal of the input component 102, and the second output terminal of the fourth transmission module 204 is connected to the input terminal of the fifth transmission module 205. The fourth transmission module 204 is used to select the signal output by the third transmission module 203 based on the control signal C and output it to the input component 102 or the fifth transmission module 205.
[0053] Optionally, the first input terminal of the input component 102 may be a microphone interface, which can be used for recording.
[0054] Optionally, the control signal C of the fourth transmission module 204 can be the same as or different from the control signals C of the first transmission module 201, the second transmission module 202 and the third transmission module 203. The specific settings are determined according to actual needs.
[0055] Optionally, the first output terminal of the fifth transmission module 205 is connected to the second input terminal of the input component 102, and the second output terminal of the fifth transmission module 205 is connected to the third input terminal of the input component 102. The fifth transmission module 205 is used to select and output the signal output by the fourth transmission module 204 to the second or third input terminal of the input component 102 based on the control signal C.
[0056] Optionally, the second input terminal and the third input port of the input component 102 may be microphone interfaces, which can be used for recording.
[0057] Optionally, the control signal C of the fifth transmission module 205 can be the same as or different from the control signals C of the first transmission module 201, the second transmission module 202, the third transmission module 203 and the fourth transmission module 204. The specific settings are determined according to actual needs.
[0058] Optionally, the signals output from the first output terminal of the fourth transmission module 204, the first output terminal of the fifth transmission module 205, and the second output terminal of the fifth transmission module 205 are the second signals.
[0059] In this embodiment, the first signal is converted into a second signal and sent to the input component 102 through the first transmission module 201, the second transmission module 202, the third transmission module 203, the fourth transmission module 204 and the fifth transmission module 205 in the test link 20, so that the signal output by the audio module 10 is returned to the input component 102, which makes it easier for the test module 103 to compare the output signal and the input signal.
[0060] exist Figure 2 Based on Figure 3 The specific structure of each transmission module is described below. Figure 3This is a schematic diagram of the structure of each transmission module provided in an embodiment of this application.
[0061] Optionally, the first transmission module 201 includes a first switch S1 and a second switch S2.
[0062] The first switch S1 and the second switch S2 can be single-pole double-throw switches, and the control signal C can control the first switch S1 and the second switch S2 to work simultaneously.
[0063] Optionally, the first end of the first switch S1 is connected to the left channel audio signal of the headphones, the second end of the first switch S1 is connected to the right channel audio signal of the headphones, and the third end of the first switch S1 is connected to the first input end of the third transmission module 203.
[0064] Specifically, the first terminal of the first switch S1 is connected to the first output terminal of the output component 101, which is used to output the left channel audio signal of the headphones. The second terminal of the first switch S1 is connected to the second output terminal of the output component 101, which is used to output the right channel audio signal of the headphones.
[0065] Optionally, the first switch S1 is used to conduct the left channel audio signal or the right channel audio signal of the headphones based on the control signal C, and input it to the first input terminal of the third transmission module 203.
[0066] Optionally, the first end of the second switch S2 is connected to the ground audio signal of the left channel of the headphones, the second end of the second switch S2 is connected to the ground audio signal of the right channel of the headphones, and the third end of the second switch S2 is connected to the second input end of the third transmission module 203.
[0067] Specifically, the first terminal of the second switch S2 is connected to the third output terminal of the output component 101, which is used to output the left channel ground audio signal of the headphones. The second terminal of the second switch S2 is connected to the fourth output terminal of the output component 101, which is used to output the right channel ground audio signal of the headphones.
[0068] Optionally, the second switch S2 is used to conduct the left channel ground audio signal or the right channel ground audio signal of the headphones based on the control signal C, and input it to the second input terminal of the third transmission module 203.
[0069] Optionally, the control terminal of the first switch S1 and the control terminal of the second switch S2 are respectively connected to the control signal C. The control signal C is used to simultaneously turn on the first terminal of the first switch S1 and the first terminal of the second switch S2, or simultaneously turn on the second terminal of the first switch S1 and the second terminal of the second switch S2.
[0070] Optionally, if the first terminal of the first switch S1 and the first terminal of the second switch S2 are simultaneously turned on, the first signal transmitted by the first transmission module 201 is the left channel audio signal of the headphones; if the second terminal of the first switch S1 and the second terminal of the second switch S2 are simultaneously turned on, the first signal transmitted by the first transmission module 201 is the right channel audio signal of the headphones.
[0071] Optionally, the grounding terminal of the first transmission module 201 is used for grounding, and the power supply terminal of the first transmission module 201 is used to connect to a power signal, which may be a 3.8-volt power signal.
[0072] In this embodiment, the first terminal of the first switch and the first terminal of the second switch are simultaneously turned on by a control signal, or the second terminal of the first switch and the second terminal of the second switch are simultaneously turned on, thereby selecting and transmitting the signal output by the output component.
[0073] Next, continue to refer to Figure 3 The specific structure of the second transmission module 202 will be described.
[0074] Optionally, the second transmission module 202 includes a third switch S3 and a fourth switch S4.
[0075] The first switch S1 and the second switch S2 can be single-pole double-throw switches, and the control signal C can control the first switch S1 and the second switch S2 to work simultaneously.
[0076] Optionally, the first end of the third switch S3 is connected to the positive signal of the speaker, the second end of the third switch S3 is connected to the positive audio signal of the communication device, and the third end of the third switch S3 is connected to the third input end of the third transmission module 203.
[0077] Specifically, the first terminal of the third switch S3 is connected to the fifth output terminal of the output component 101, which is used to output a positive signal from the speaker. The second terminal of the third switch S3 is connected to the sixth output terminal of the output component 101, which is used to output a positive audio signal from the communication device.
[0078] Optionally, the third switch S3 is used to conduct the horn signal or the audio signal of the communication device based on the control signal C, and input it to the third input terminal of the third transmission module 203.
[0079] Optionally, the first end of the fourth switch S4 is connected to the negative signal of the speaker, the second end of the fourth switch S4 is connected to the negative audio signal of the communication device, and the third end of the fourth switch S4 is connected to the fourth input end of the third transmission module 203.
[0080] Specifically, the first terminal of the fourth switch S4 is connected to the seventh output terminal of the output component 101, which is used to output a negative signal from the speaker. The second terminal of the second switch S2 is connected to the eighth output terminal of the output component 101, which is used to output a negative audio signal from the communication device.
[0081] Optionally, the fourth switch S4 is used to conduct the horn signal or the audio signal of the communication device based on the control signal C, and input it to the fourth input terminal of the third transmission module 203.
[0082] Optionally, the output terminals of the output component 101 include a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, a sixth output terminal, a seventh output terminal, and an eighth output terminal to transmit the left channel audio signal of the headphones, the right channel audio signal of the headphones, a speaker signal, and a communication device audio signal. The left channel audio signal of the headphones corresponds to the left channel ground audio signal of the headphones, and the right channel audio signal of the headphones corresponds to the right channel ground audio signal of the headphones. The speaker signal includes a positive speaker signal and a negative speaker signal, and the communication device audio signal includes a positive communication device audio signal and a negative communication device audio signal. All of the above signals are output to the first transmission module 201 and the second transmission module 202 through the respective output terminals of the output component 101.
[0083] Optionally, the control terminals of the third switch S3 and the fourth switch S4 are respectively connected to the control signal C. The control signal C is used to simultaneously turn on the first terminal of the third switch S3 and the first terminal of the fourth switch S4, or simultaneously turn on the second terminal of the third switch S3 and the second terminal of the fourth switch S4.
[0084] Optionally, if the first terminal of the third switch S3 and the first terminal of the fourth switch S4 are simultaneously turned on, the first signal transmitted by the second transmission module 202 is a speaker signal; if the second terminal of the third switch S3 and the second terminal of the fourth switch S4 are simultaneously turned on, the first signal transmitted by the second transmission module 202 is a communication device audio signal.
[0085] Optionally, the grounding terminal of the second transmission module 202 is used for grounding, and the power supply terminal of the second transmission module 202 is used to connect to a power signal, which can be a 3.8-volt power signal.
[0086] In this embodiment, the first terminal of the third switch and the first terminal of the fourth switch are simultaneously turned on by a control signal, or the second terminal of the third switch and the second terminal of the fourth switch S4 are simultaneously turned on, thereby selecting and transmitting the signal output by the output component.
[0087] Optionally, the control signal C accessed by the first transmission module 201 and the control signal C accessed by the second transmission module 202 can be the same, so that the first transmission module 201 and the second transmission module 202 simultaneously select and conduct a path, and input the signal in the path to the third transmission module 203.
[0088] Next, continue to refer to Figure 3 The specific structure of the third transmission module 203 will be described.
[0089] Optionally, the third transmission module 203 includes a fifth switch S5 and a sixth switch S6.
[0090] Among them, the fifth switch S5 and the sixth switch S6 can be single-pole double-throw switches, and the control signal C can control the fifth switch S5 and the sixth switch S6 to work simultaneously.
[0091] Optionally, the first end of the fifth switch S5 is connected to the third end of the first switch S1 in the first transmission module 201, the second end of the fifth switch S5 is connected to the third end of the third switch S3 in the second transmission module 202, and the third end of the fifth switch S5 is connected to the first input end of the fourth transmission module 204.
[0092] Specifically, the first end of the fifth switch S5 is used to receive the left channel audio signal or the right channel audio signal of the headphones sent by the first transmission module 201, and the second end of the fifth switch S5 is used to receive the positive signal of the speaker or the positive audio signal of the communication device sent by the second transmission module 202.
[0093] Optionally, the first end of the sixth switch S6 is connected to the third end of the second switch S2 in the first transmission module 201, the second end of the sixth switch S6 is connected to the third end of the fourth switch S4 in the second transmission module 202, and the third end of the sixth switch S6 is connected to the second input end of the fourth transmission module 204.
[0094] Specifically, the first end of the sixth switch S6 is used to receive the left channel ground audio signal or the right channel ground audio signal of the headphones sent by the first transmission module 201, and the second end of the sixth switch S6 is used to receive the speaker negative signal or the communication device negative audio signal sent by the second transmission module 202.
[0095] Optionally, if the control signal C accessed by the first transmission module 201 is the same as the control signal C accessed by the second transmission module 202, then the left channel audio signal of the headphones and the speaker signal are output, or the right channel ground audio signal of the headphones and the audio signal of the communication device are output.
[0096] Optionally, the control terminals of the fifth switch S5 and the sixth switch S6 are respectively connected to the control signal C. The control signal C is used to simultaneously turn on the first terminal of the fifth switch S5 and the first terminal of the sixth switch S6, or simultaneously turn on the second terminal of the fifth switch S5 and the second terminal of the sixth switch S6.
[0097] Optionally, the control signal C is used to select the signals sent by the first transmission module 201 and the second transmission module 202, and output them to the fourth transmission module 204.
[0098] Optionally, the grounding terminal of the third transmission module 203 is used for grounding, and the power supply terminal of the third transmission module 203 is used to connect to a power signal, which can be a 3.8-volt power signal.
[0099] In this embodiment, the fifth and sixth switches are controlled by a control signal to select and transmit signals sent by the first and second transmission modules.
[0100] Next, continue to refer to Figure 3 The specific structure of the fourth transmission module 204 will be described.
[0101] Optionally, the fourth transmission module 204 includes a seventh switch S7 and an eighth switch S8.
[0102] Among them, the seventh switch S7 and the eighth switch S8 can be single-pole double-throw switches, and the control signal C can control the seventh switch S7 and the eighth switch S8 to work simultaneously.
[0103] Optionally, the third terminal of the seventh switch S7 is connected to the third terminal of the fifth switch S5, the first terminal of the seventh switch S7 is connected to the first positive input terminal of the input component 102, and the second terminal of the seventh switch S7 is connected to the first input terminal of the fifth transmission module 205.
[0104] Specifically, the third terminal of the seventh switch S7 is used to receive the signal sent by the third transmission module 203, and to transmit the received signal through the first and second terminals.
[0105] Optionally, the third terminal of the eighth switch S8 is connected to the third terminal of the sixth switch S6, the first terminal of the eighth switch S8 is connected to the first negative input terminal of the input component 102, and the second terminal of the eighth switch S8 is connected to the second input terminal of the fifth transmission module 205.
[0106] Specifically, the first terminal of the eighth switch S8 is used to receive the signal sent by the third transmission module 203, and to transmit the received signal through the first terminal and the second terminal.
[0107] Optionally, the control terminals of the seventh switch S7 and the eighth switch S8 are respectively connected to the control signal C. The control signal C is used to simultaneously turn on the first terminal of the seventh switch S7 and the first terminal of the eighth switch S8, or simultaneously turn on the second terminal of the seventh switch S7 and the second terminal of the eighth switch S8.
[0108] Optionally, the control signal C is used to output the received signal through the first terminal of the seventh switch S7 and the first terminal of the eighth switch S8, or through the second terminal of the seventh switch S7 and the second terminal of the eighth switch S8.
[0109] Optionally, the grounding terminal of the fourth transmission module 204 is used for grounding, and the power supply terminal of the fourth transmission module 204 is used to connect to a power signal, which can be a 3.8-volt power signal.
[0110] In this embodiment, the seventh and eighth switches are controlled by a control signal to send signals to the third transmission module and output them through the signal selection path.
[0111] Next, continue to refer to Figure 3 The specific structure of the fifth transmission module 205 will be described.
[0112] Optionally, the fifth transmission module 205 includes a ninth switch S9 and a tenth switch S10.
[0113] Among them, the ninth switch S9 and the tenth switch S10 can be single-pole double-throw switches, and the control signal C can control the ninth switch S9 and the tenth switch S10 to work simultaneously.
[0114] Optionally, the third terminal of the ninth switch S9 is connected to the second terminal of the seventh switch S7, the first terminal of the ninth switch S9 is connected to the second positive input terminal of the input component 102, and the second terminal of the ninth switch S9 is connected to the third positive input terminal of the input component 102.
[0115] Specifically, the third terminal of the ninth switch S9 is used to receive the signal sent by the fourth transmission module 204, and to transmit the received signal through the first and second terminals.
[0116] Optionally, the third terminal of the tenth switch S10 is connected to the second terminal of the eighth switch S8, the first terminal of the tenth switch S10 is connected to the second negative input terminal of the input component 102, and the second terminal of the tenth switch S10 is connected to the third negative input terminal of the input component 102.
[0117] Specifically, the third terminal of the tenth switch S10 is used to receive the signal sent by the fourth transmission module 204, and to transmit the received signal through the first and second terminals.
[0118] Optionally, the control terminals of the ninth switch S9 and the tenth switch S10 are respectively connected to the control signal C. The control signal C is used to simultaneously turn on the first terminal of the ninth switch S9 and the first terminal of the tenth switch S10, or simultaneously turn on the second terminal of the ninth switch S9 and the second terminal of the tenth switch S10.
[0119] Optionally, the control signal C is used to output the received signal through the first terminal of the ninth switch S9 and the first terminal of the tenth switch S10, or through the second terminal of the ninth switch S9 and the second terminal of the tenth switch S10.
[0120] Optionally, the grounding terminal of the fifth transmission module 205 is used for grounding, and the power supply terminal of the fifth transmission module 205 is used to connect to a power signal, which can be a 3.8-volt power signal.
[0121] In this embodiment, the ninth and tenth switches are controlled by a control signal to send signals to the fifth transmission module and output them through the signal selection path.
[0122] Optionally, for the input component 102, the input terminal includes a first input terminal, a second input terminal, and a third input terminal. The first input terminal includes a first positive input terminal and a first negative input terminal, the second input terminal includes a second positive input terminal and a second negative input terminal, and the third input terminal includes a third positive input terminal and a third negative input terminal.
[0123] As an optional implementation, the transmission logic of each transmission module will be described in general and illustrated below. For each switch in each transmission module, when the control signal C is high, the third terminal is connected to the first terminal; when the control signal C is low, the third terminal is connected to the second terminal. Figure 3 In the structure shown, the ports with the switches on top are typically considered as the first terminals. Based on this, the control logic of the control signal C is listed in Table 1 below. The control signal C sent to the first transmission module 201 is the same control signal C1, the control signal C sent to the third transmission module 203 can be control signal C2, the control signal C sent to the fourth transmission module 204 can be control signal C3, and the control signal C sent to the fifth transmission module 205 can be control signal C4.
[0124] Table 1
[0125] Optionally, the first transmission module 201, the second transmission module 202, and the third transmission module 203 are used to select the received signal and send it to the fourth transmission module 204. The fourth transmission module 204 and the fifth transmission module 205 are used to select the received signal and send it to the first input terminal, the second input terminal, or the third output terminal.
[0126] As an optional implementation, the number and type of transmission modules can be set based on the number of input terminals of input component 102 and the number of output terminals of output component 101. In this embodiment, the first transmission module 201, the second transmission module 202, and the third transmission module 203 can be replaced with a transmission module containing a single-pole four-throw switch, and the fourth transmission module 204 and the fifth transmission module 205 can be replaced with a transmission module containing a single-pole three-throw switch.
[0127] Next, refer to Figure 4 The signal processing module in the audio module testing device is further described. Figure 4 This is a schematic diagram of the structure of a signal processing module provided in an embodiment of this application.
[0128] Optionally, the audio module testing device also includes: multiple signal processing modules, each including a transistor Q and a resistor R.
[0129] Optionally, the base of transistor Q is used to receive the original control signal AC, the emitter of transistor Q is grounded, the collector of transistor Q is connected to the control terminal of each transmission module in the test link 20 and the second terminal of resistor R, and the first terminal of resistor R is used to connect the power signal.
[0130] The transmission modules include a first transmission module 201, a second transmission module 202, a third transmission module 203, a fourth transmission module 204, and a fifth transmission module 205. Each transmission module corresponds one-to-one with a signal processing module.
[0131] Optionally, the power signal can be a 3.8-volt signal.
[0132] Optionally, transistor Q can be an NPN transistor Q, with its base connected to the original control signal AC via resistor R. The original control signal AC is used to turn transistor Q on or off. Specifically, when the original control signal AC is high, current flows into the base of transistor Q, turning it on. The collector and emitter are approximately short-circuited, resulting in a low-level output control signal C. When the original control signal AC is low, transistor Q is off, and the power supply signal pulls up the voltage of control signal C through the fourth resistor R, making control signal C high.
[0133] In addition, the resistor R can be, for example, 10 kΩ. In addition to pulling up the voltage level, the resistor R can also provide current limiting protection for the transistor Q.
[0134] Optionally, the control chip of the audio module 10 can output multiple raw control signals AC to each signal processing module, so that each signal processing module outputs control signal C to the transmission module.
[0135] In this embodiment, the signal processing module outputs a control signal C, thereby stabilizing the signals received by each signal processing module.
[0136] Next, in Figure 1 Based on, refer to Figure 5 The specific structure of test module 103 is described below. Among other things, Figure 5 This is a schematic diagram of the structure of a test module 103 provided in an embodiment of this application.
[0137] Optionally, the test module 103 includes: a first analog-to-digital conversion unit 1031, a second analog-to-digital conversion unit 1032, and a comparison unit 1033.
[0138] Optionally, one end of the first analog-to-digital converter 1031 is connected to the output end of the input component 102, and the other end of the first analog-to-digital converter 1031 is connected to the first end of the comparison unit 1033.
[0139] Optionally, one end of the second analog-to-digital converter 1032 is connected to the input end of the output component 101, and the other end of the second analog-to-digital converter 1032 is connected to the second end of the comparison unit 1033.
[0140] Optionally, the third terminal of the comparison unit 1033 is used to output an indication signal.
[0141] Optionally, the first analog-to-digital converter (ADC) unit 1031 converts the analog signal input to the input component 102 into a first digital signal, and the second ADC unit 1032 converts the analog signal output from the output component 101 into a second digital signal. The first ADC unit 1031 and the second ADC unit 1032 respectively send the first digital signal and the second digital signal to the comparison unit 1033, which compares the first digital signal and the second digital signal. If the first digital signal and the second digital signal are the same, the output indicator signal indicates that the audio module is not faulty; if the first digital signal and the second digital signal are different, the output indicator signal indicates that the audio module 10 is faulty.
[0142] In this embodiment, the output audio signal and the input audio signal are compared through the first analog-to-digital conversion unit, the second analog-to-digital conversion unit, and the comparison unit to obtain the detection result of whether the audio module has a fault.
[0143] As an optional implementation, the test module 103 is built into the audio module 10.
[0144] Optionally, when the test module 103 is built into the audio module 10, the audio module test device can be directly manufactured as a product to be manufactured.
[0145] As an alternative implementation, the test module 103 is externally mounted within the audio module 10.
[0146] Optionally, when the test module 103 is external to the audio module 10, the audio module 10 can be manufactured as a product to be produced after the test module 103 has completed its testing of the audio module 10.
[0147] In this embodiment, the test module is built into the audio module to compare the input signal waveform and the output signal waveform, thereby realizing the test of the audio module.
[0148] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. An audio module testing device, characterized in that, The audio module testing device includes the audio module under test, the test link, and the test module. The audio module includes input components and output components. The test module is connected to both the input component and the output component. The output terminal of the output component is connected to the first terminal of the test link, and the second terminal of the test link is connected to the input terminal of the input component. The first signal generated by the audio module is transmitted to the input component via the output component and the test link, so as to output a second signal from the input component; The test module is used to compare the first signal and the second signal, generate and output an indication signal, which is used to indicate whether the audio module has a fault.
2. The audio module testing device according to claim 1, characterized in that, The test link includes: a first transmission module, a second transmission module, a third transmission module, a fourth transmission module, and a fifth transmission module; The input terminal of the first transmission module is connected to the output terminal of the output component, and the output terminal of the first transmission module is connected to the first input terminal of the third transmission module. The first transmission module is used to receive the left channel audio signal and the right channel audio signal of the headphones, and select and output the left channel audio signal or the right channel audio signal of the headphones based on the control signal. The input terminal of the second transmission module is connected to the output terminal of the output component, and the output terminal of the second transmission module is connected to the second input terminal of the third transmission module. The second transmission module is used to receive speaker signals and communication device audio signals, and select and output speaker signals or communication device audio signals based on control signals. The output terminal of the third transmission module is connected to the input terminal of the fourth transmission module. The third transmission module is used to select and output the signals output by the first transmission module and the second transmission module based on the control signal. The first output terminal of the fourth transmission module is connected to the first input terminal of the input component, and the second output terminal of the fourth transmission module is connected to the input terminal of the fifth transmission module. The fourth transmission module is used to select the signal output by the third transmission module based on the control signal and output it to the input component or the fifth transmission module. The first output terminal of the fifth transmission module is connected to the second input terminal of the input component, and the second output terminal of the fifth transmission module is connected to the third input terminal of the input component. The fifth transmission module is used to select and output the signal output by the fourth transmission module to the second or third input terminal of the input component based on the control signal.
3. The audio module testing device according to claim 2, characterized in that, The first transmission module includes a first switch and a second switch; The first terminal of the first switch is connected to the left channel audio signal of the earphone, the second terminal of the first switch is connected to the right channel audio signal of the earphone, and the third terminal of the first switch is connected to the first input terminal of the third transmission module. The first terminal of the second switch is connected to the ground audio signal of the left channel of the headphones, the second terminal of the second switch is connected to the ground audio signal of the right channel of the headphones, and the third terminal of the second switch is connected to the second input terminal of the third transmission module. The control terminals of the first switch and the second switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminal of the first switch and the first terminal of the second switch, or to simultaneously turn on the second terminal of the first switch and the second terminal of the second switch.
4. The audio module testing device according to claim 3, characterized in that, The second transmission module includes a third switch and a fourth switch; The first end of the third switch is connected to a positive signal from the speaker, the second end of the third switch is connected to a positive audio signal from the communication device, and the third end of the third switch is connected to the third input end of the third transmission module. The first terminal of the fourth switch is connected to the negative signal of the speaker, the second terminal of the fourth switch is connected to the negative audio signal of the communication device, and the third terminal of the fourth switch is connected to the fourth input terminal of the third transmission module. The control terminals of the third switch and the fourth switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminals of the third switch and the first terminals of the fourth switch, or to simultaneously turn on the second terminals of the third switch and the second terminals of the fourth switch.
5. The audio module testing device according to claim 4, characterized in that, The third transmission module includes a fifth switch and a sixth switch; The first end of the fifth switch is connected to the third end of the first switch in the first transmission module, the second end of the fifth switch is connected to the third end of the third switch in the second transmission module, and the third end of the fifth switch is connected to the first input end of the fourth transmission module. The first end of the sixth switch is connected to the third end of the second switch in the first transmission module, the second end of the sixth switch is connected to the third end of the fourth switch in the second transmission module, and the third end of the sixth switch is connected to the second input end of the fourth transmission module. The control terminal of the fifth switch and the control terminal of the sixth switch are respectively connected to control signals. The control signals are used to make the first terminal of the fifth switch and the first terminal of the sixth switch simultaneously conduct, or to make the second terminal of the fifth switch and the second terminal of the sixth switch simultaneously conduct.
6. The audio module testing device according to claim 5, characterized in that, The fourth transmission module includes a seventh switch and an eighth switch; The third terminal of the seventh switch is connected to the third terminal of the fifth switch, the first terminal of the seventh switch is connected to the first positive input terminal of the input component, and the second terminal of the seventh switch is connected to the first input terminal of the fifth transmission module. The third terminal of the eighth switch is connected to the third terminal of the sixth switch, the first terminal of the eighth switch is connected to the first negative input terminal of the input component, and the second terminal of the eighth switch is connected to the second input terminal of the fifth transmission module. The control terminal of the seventh switch and the control terminal of the eighth switch are respectively connected to control signals. The control signals are used to make the first terminal of the seventh switch and the first terminal of the eighth switch simultaneously conduct, or to make the second terminal of the seventh switch and the second terminal of the eighth switch simultaneously conduct.
7. The audio module testing device according to claim 6, characterized in that, The fifth transmission module includes a ninth switch and a tenth switch; The third terminal of the ninth switch is connected to the second terminal of the seventh switch, the first terminal of the ninth switch is connected to the second positive input terminal of the input component, and the second terminal of the ninth switch is connected to the third positive input terminal of the input component. The third terminal of the tenth switch is connected to the second terminal of the eighth switch, the first terminal of the tenth switch is connected to the second negative input terminal of the input component, and the second terminal of the tenth switch is connected to the third negative input terminal of the input component. The control terminal of the ninth switch and the control terminal of the tenth switch are respectively connected to control signals. The control signals are used to simultaneously turn on the first terminal of the ninth switch and the first terminal of the tenth switch, or to simultaneously turn on the second terminal of the ninth switch and the second terminal of the tenth switch.
8. The audio module testing apparatus according to any one of claims 2-7, characterized in that, The audio module testing device also includes: multiple signal processing modules, each of which includes transistors and resistors; The base of the transistor is used to receive the original control signal, the emitter of the transistor is grounded, the collector of the transistor is connected to the control terminal of each transmission module in the test link and the second terminal of the resistor, and the first terminal of the resistor is used to connect the power signal.
9. The audio module testing device according to claim 1, characterized in that, The test module includes: a first analog-to-digital conversion unit, a second analog-to-digital conversion unit, and a comparison unit; One end of the first analog-to-digital conversion unit is connected to the output end of the input component, and the other end of the first analog-to-digital conversion unit is connected to the first end of the comparison unit. One end of the second analog-to-digital converter is connected to the input end of the output component, and the other end of the second analog-to-digital converter is connected to the second end of the comparison unit; The third terminal of the comparison unit is used to output an indication signal.
10. The audio module testing device according to claim 1, characterized in that, The testing module is built into the audio module.