Parallel detection device and detection method for audio patch cord

Abstract

The invention aims to provide a parallel detection device and a parallel detection method for audio patch cords. The system comprises an upper computer, a control module, a power supply module, a signal switching module, a pin point switching module, a USB-C switching module and a product to be tested, wherein the signal switching module comprises an audio module; the product to be tested is connected to a USB-C port of the upper computer through the USB-C switching module and the signal switching module in sequence, an RJ45 port of the control module is connected with a corresponding port of the upper computer, a UART port of the power supply module is connected with a corresponding port of the control module, and a USB-C port of the USB-C switching module is connected with a USB-C port of the signal switching module. A VBUS port of the power supply module is connected with a corresponding port of the USB-C switching module, an input end of the audio module is divided into two paths, one path is grounded through a load, and the other path is connected or disconnected with an audio output end of the product to be tested through a pin point switching module. The method is applied to the technical field of finished product function rapid testing.

Description

Technical Field

[0001] The present invention is applied to the technical field of fast testing of finished product functions, and in particular relates to a parallel detection device and a detection method for an audio adapter cable. Background Art

[0002] Nowadays, more and more mobile phones and digital products have gradually cancelled the 3.5mm audio interface. Manufacturers have instead launched their own TWS true wireless headphones or headphones with Type-C interfaces. Few products come with Type-C to 3.5mm adapters, which is not very friendly to some consumers who do not accept true wireless headphones and pursue the sound quality of wired headphones. With the gradual popularization of the C port, Type-C to 3.5mm audio conversion cables will become a popular category like TWS headphones, and the corresponding testing needs for this module are also increasing.

[0003] Audio parameters are the core parameters of the product. How to accurately and efficiently test audio parameters to ensure product qualification rate and factory consistency has become an urgent problem to be solved. Traditional solutions mostly use serial testing, parallel testing and standard instruments for testing. The disadvantages of serial testing are low efficiency, and the disadvantages of parallel testing are high cost. Multiple USB sound cards are added to the computer. The disadvantages of using standard instruments are large size, high cost, and inconvenient integration into customized equipment. Therefore, it is necessary to provide a parallel detection device and detection method for audio adapter cables, which have the advantages of low cost, small size, high integration, easy installation and integration, easy mass production, and more reasonable calculation method. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a parallel detection device and detection method for an audio adapter cable, which has the advantages of low cost, small size, high integration, easy installation and integration, easy mass production, and a more reasonable calculation method.

[0005] The technical solution adopted by the present invention is: the present invention includes a host computer, a control module, a power module, a signal adapter module, a pin point adapter module, a USB-C adapter module and a product to be tested, wherein the signal adapter module includes an audio module; the product to be tested is connected to the USB-C port of the host computer via the USB-C adapter module and the signal adapter module in sequence, the RJ45 port of the control module is connected to the corresponding port of the host computer, the UART port of the power module is connected to the corresponding port of the control module, the VBUS port of the power module is connected to the corresponding port of the USB-C adapter module, and the input end of the audio module is divided into two paths, one path is grounded via a load, and the other path is connected or disconnected with the audio output end of the product to be tested via the pin point adapter module.

[0006] It can be seen from the above scheme that this application has the following advantages: 1. Use the SN of the product to be tested to identify different test channels and implement parallel testing without increasing hardware costs. The conventional solution is to add multiple USB sound cards on the computer side, which cost between 400 and 5,000 yuan. Based on 4 channels per device, the minimum cost saving for one device is 400*4=1,600 yuan, the minimum cost saving for 10 devices is 1,600*10=16,000 yuan, and the minimum cost saving for 100 devices is 1,600*100=160,000 yuan; 2. Use multiple standard resistors to simulate audio loads. The cost is low, the size is small, and it is easy to integrate into the PCB board. In addition, the conventional solution is to use standard speakers for simulation. The shape of the speakers is generally basin-shaped, cylindrical, or other irregular shapes. If you need to select different load tests, you need to install multiple speakers. Taking the 4 channels of this solution as an example, each channel requires 4 different loads, and a total of 16 speakers need to be installed. The overall mechanical structure will be increased accordingly, and additional installation methods are required; the standard resistors in the 0603 package are very small in size and can be directly designed and installed and integrated into the PCB board, and the price is also cheaper; 3. Use customized audio modules to replace standard instruments. They are low-cost, small in size and easy to integrate into PCB boards. The conventional solution is to use standard instruments for testing. The industry generally uses AP brand products, such as the APX5XX series, which cost more than 30,000 yuan and are relatively large in size. The cost of a customized audio module is about 500 yuan, with a size of 56mm*28mm*17.8mm. The output signal is connected using a B2B connector, which can be directly designed and integrated into the PCB board.

[0007] In summary, the present application uses parallel testing, has high efficiency, low cost, is easy to mass produce, has a small size, high integration, is easy to install and integrate into the test board, and the testing method is more reasonable.

[0008] A preferred solution is that the detection method includes an audio output mode test of the right channel, and the test steps are as follows: Step A1, setting the USB C terminal of the host computer to connect to the USB C terminal of the product to be tested; Step A2, setting the input end of the audio module to connect to the right channel of the AUDIO JACK end of the product to be tested; Step A3, setting the four products to be tested to be powered on at the same time; Step A4, setting the four products to be tested to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the products to be tested and output from the AUDIO JACK terminal, and the host computer identifies the four test channels according to different SNs; Step A5, setting the right channels of the AUDIO JACK ends of the four products to be tested to be connected to a 3KR load; Step A6, setting the host computer to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product under test; Step A7, the input end of the audio module measures the signal parameters of the right channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step A8: When the 1KHZ frequency remains unchanged, the broadcasting values ​​of the host computer are changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module measures the output results respectively.

[0009] A preferred solution is that the detection method further includes an audio output mode test of the left channel, and the test steps are as follows: Step B1, setting the USB C terminal of the host computer to connect to the USB C terminal of the product to be tested; Step B2, setting the input end of the audio module to connect to the left channel of the AUDIO JACK end of the product to be tested; Step B3, setting the four products to be tested to be powered on at the same time; Step B4, setting the four products to be tested to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the product to be tested and output from the AUDIO JACK terminal, and the host computer identifies the four test channels according to different SNs; Step B5, setting the left channels of the AUDIO JACK ends of the four products to be tested to be connected to a 3KR load; Step B6, setting the host computer to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product under test; Step B7, the input end of the audio module measures the signal parameters of the left channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step B8: When the frequency of 1KHZ remains unchanged, the broadcasting value of the host computer is changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module measures the output results respectively.

[0010] A preferred solution is that the detection method further includes an input mode test of the right channel, and the test steps are as follows: Step C1, setting the USB C terminal of the host computer to connect to the USB C terminal of the product to be tested; Step C2, setting the input end of the audio module to connect to the right channel of the AUDIO JACK end of the product to be tested; Step C3, setting the four products to be tested to be powered on at the same time; Step C4, setting the four products to be tested to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the products to be tested and then output from the USB C end, and the host computer identifies the four test channels according to different SNs; Step C5, setting the right channels of the AUDIO JACK terminals of the four products to be tested to be connected to a 3KR load; Step C6, setting the host computer to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product to be tested; Step C7, the host computer records the audio signal of the right channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step C8, when the 1KHZ frequency remains unchanged, the broadcast parameter RMS of the audio module is changed to 250mVrms, 500mVrms, and 1Vrms respectively, and the host computer records the audio signal of the right channel of the USB C end respectively, and then analyzes the recorded audio parameters.

[0011] A preferred solution is that the detection method further includes an input mode test of the left channel, and the test steps are as follows: Step D1, setting the USB C terminal of the host computer to connect to the USB C terminal of the product to be tested; Step D2, setting the input end of the audio module to connect to the left channel of the AUDIO JACK end of the product to be tested; Step D3, setting the four products to be tested to be powered on at the same time; Step D4, setting the four products to be tested to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the products to be tested and then output from the USB C end, and the host computer identifies the four test channels according to different SNs; Step D5, setting the left channels of the AUDIO JACK ends of the four products to be tested to be connected to a 3KR load; Step D6, setting the host computer to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product to be tested; Step D7, the host computer records the audio signal of the left channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step D8, when the 1KHZ frequency remains unchanged, the broadcast parameter RMS of the audio module is changed to 250mVrms, 500mVrms, and 1Vrms respectively, and the host computer records the audio signal of the left channel of the USB C end respectively, and then analyzes the recorded audio parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a system block diagram of the present invention; Figure 2 is an example diagram of the SN display of the product to be tested; Figure 3 It is an audio signal test path diagram in the output mode of the present invention; Figure 4 This is an example diagram of test data of the right channel in the output mode of the present invention; Figure 5 This is an example diagram of test data of the left channel in the output mode of the present invention; Figure 6 It is an audio signal test path diagram of the present invention in input mode; Figure 7 It is an example diagram of test data of the right channel in the input mode of the present invention; Figure 8 This is an example diagram of test data of the right channel in the input mode of the present invention. DETAILED DESCRIPTION

[0013] like Figure 1 and Figure 2 As shown, in this embodiment, the present invention includes a host computer 1, a control module 2, a power module 3, a signal adapter module 4, a pin point adapter module 5, a USB-C adapter module 7 and a product to be tested 8, wherein the signal adapter module 4 includes an audio module 6; the product to be tested 8 is connected to the USB-C port of the host computer 1 via the USB-C adapter module 7 and the signal adapter module 4 in sequence, the RJ45 port of the control module 2 is connected to the corresponding port of the host computer 1, the UART port of the power module 3 is connected to the corresponding port of the control module 2, the VBUS port of the power module 3 is connected to the corresponding port of the USB-C adapter module 7, and the input end of the audio module 6 is divided into two paths, one path is grounded via a load, and the other path is connected or disconnected with the audio output end of the product to be tested 8 via the pin point adapter module 5.

[0014] The host computer 1 is used to run the program; the control module 2 exchanges information with the host computer 1, controls the output of the power module 3 through UART, and controls the output and input of the audio module 6 through I2S; the power module 3 is a programmable voltage output 0-10V to power the product; the output end of the audio module 6 can simulate the output of an audio signal; the input end of the audio module 6 can simulate the measurement of an audio signal; the signal adapter module 4 is used to transfer audio module signals, USB C signals, and power signals; the pin point adapter module 5 transfers the audio signal of the product to be tested 8 to the signal adapter module 4; the USB-C adapter module 7 is used to transfer the Type C signal of the product to be tested 8.

[0015] like Figure 3 and Figure 4 As shown, in this embodiment, the detection method includes an audio output mode test of the right channel, and the test steps are as follows: Step A1, setting the USB C terminal of the host computer 1 to connect to the USB C terminal of the product to be tested 8; Step A2, setting the input end of the audio module 6 to be connected to the right channel of the AUDIO JACK end of the product to be tested 8; Step A3, setting the four products to be tested 8 to be powered on at the same time; Step A4, setting the four products under test 8 to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the product under test 8 and then output from the AUDIO JACK terminal, and the host computer 1 identifies the four test channels according to different SNs; Step A5, setting the right channels of the AUDIO JACK terminals of the four products to be tested 8 to be connected to a 3KR load; Step A6, setting the host computer 1 to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product under test 8; Step A7, the input end of the audio module 6 measures the signal parameters of the right channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step A8: When the frequency of 1KHZ remains unchanged, the broadcasting value of the host computer 1 is changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module 6 measures the output results respectively.

[0016] like Figure 3 and Figure 5 As shown, in this embodiment, the detection method further includes an audio output mode test of the left channel, and the test steps are as follows: Step B1, setting the USB C terminal of the host computer 1 to connect to the USB C terminal of the product to be tested 8; Step B2, setting the input end of the audio module 6 to be connected to the left channel of the AUDIO JACK end of the product to be tested 8; Step B3, setting the four products to be tested 8 to be powered on at the same time; Step B4, setting the four products under test 8 to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the product under test 8 and then output from the AUDIO JACK terminal, and the host computer 1 identifies the four test channels according to different SNs; Step B5, setting the left channels of the AUDIO JACK terminals of the four products to be tested 8 to be connected to a 3KR load; Step B6, setting the host computer 1 to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product under test 8; Step B7, the input end of the audio module 6 measures the signal parameters of the left channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step B8: When the 1KHZ frequency remains unchanged, the broadcasting values ​​of the host computer 1 are changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module 6 measures the output results respectively.

[0017] like Figure 6 and Figure 7 As shown, in this embodiment, the detection method further includes an input mode test of the right channel, and the test steps are as follows: Step C1, setting the USB C terminal of the host computer 1 to connect to the USB C terminal of the product to be tested 8; Step C2, setting the input end of the audio module 6 to be connected to the right channel of the AUDIO JACK end of the product to be tested 8; Step C3, setting the four products to be tested 8 to be powered on at the same time; Step C4, setting the four products under test 8 to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the product under test 8 and then output from the USB C end, and the host computer 1 identifies the four test channels according to different SNs; Step C5, setting the right channels of the AUDIO JACK terminals of the four products to be tested 8 to be connected to a 3KR load; Step C6, setting the host computer 1 to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product under test 8; Step C7, the host computer 1 records the audio signal of the right channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step C8, when the 1KHZ frequency remains unchanged, the broadcast parameter RMS of the audio module 6 is changed to 250mVrms, 500mVrms, and 1Vrms respectively, and the host computer 1 records the audio signal of the right channel of the USB C terminal respectively, and then analyzes the recorded audio parameters.

[0018] like Figure 6 and Figure 8 As shown, in this embodiment, the detection method further includes an input mode test of the left channel, and the test steps are as follows: Step D1, setting the USB C terminal of the host computer 1 to connect to the USB C terminal of the product to be tested 8; Step D2, setting the input end of the audio module 6 to be connected to the left channel of the AUDIO JACK end of the product to be tested 8; Step D3, setting the four products to be tested 8 to be powered on at the same time; Step D4, setting the four products under test 8 to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the product under test 8 and then output from the USB C end, and the host computer 1 identifies the four test channels according to different SNs; Step D5, setting the left channels of the AUDIO JACK terminals of the four products to be tested 8 to be connected to a 3KR load; Step D6, setting the host computer 1 to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product under test 8; Step D7, the host computer 1 records the audio signal of the left channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step D8, when the frequency of 1KHZ remains unchanged, the broadcast parameter RMS of the audio module 6 is changed to 250mVrms, 500mVrms, and 1Vrms respectively, and the host computer 1 records the audio signal of the left channel of the USB C end respectively, and then analyzes the recorded audio parameters.

[0019] In this embodiment, except for the host computer 1 and the control module 2, the rest of the parts adopt independent modules, that is, each channel maintains independent control, and the present application is described with a 4-channel design; if the product to be tested 8 is a finished product, the audio output signal does not need the pin point adapter module 5 to perform signal transfer, and the output end of the product to be tested 8 can be connected to the signal transfer module 4 with an audio line; the audio load is designed on the signal transfer module 4, and precision resistors with resistance values ​​of 15R, 30R, 3K and an accuracy of 0.1% 0603 are selected respectively, and the audio output end connected to the DUT can be independently controlled; the SN storage of the product to be tested 8 requires the firmware to write the SN into the internal memory and add a display function. When the product to be tested 8 is connected to the host computer 1, the product to be tested 8 is set to output or input mode. When the host computer 1 checks the USB hardware information, the written SN can be displayed.

[0020] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A parallel detection device for an audio adapter cable, characterized in that: It comprises a host computer (1), a control module (2), a power module (3), a signal transfer module (4), a pin point transfer module (5), a USB-C transfer module (7) and a product to be tested (8), wherein the signal transfer module (4) comprises an audio module (6); the product to be tested (8) is connected to the USB-C port of the host computer (1) via the USB-C transfer module (7) and the signal transfer module (4) in sequence, the RJ45 port of the control module (2) is connected to the corresponding port of the host computer (1), the UART port of the power module (3) is connected to the corresponding port of the control module (2), the VBUS port of the power module (3) is connected to the corresponding port of the USB-C transfer module (7), and the input end of the audio module (6) is divided into two paths, one path is grounded via a load, and the other path is connected or disconnected with the audio output end of the product to be tested (8) via the pin point transfer module (5).

2. A detection method for the parallel detection device of the audio adapter cable as claimed in claim 1, characterized in that: The detection method includes an audio output mode test of the right channel, and the test steps are as follows: Step A1, setting the USB C terminal of the host computer (1) to be connected to the USB C terminal of the product to be tested (8); Step A2, setting the input end of the audio module (6) to be connected to the right channel of the AUDIO JACK end of the product to be tested (8); Step A3, setting the four products to be tested (8) to be powered on at the same time; Step A4, setting the four products to be tested (8) to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the products to be tested (8) and then output from the AUDIO JACK terminal, and the host computer (1) identifies the four test channels according to different SNs; Step A5, setting the right channels of the AUDIO JACK terminals of the four products to be tested (8) to be connected to a 3KR load; Step A6, setting the host computer (1) to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product to be tested (8); Step A7, the input end of the audio module (6) measures the signal parameters of the right channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step A8: When the 1KHZ frequency remains unchanged, the broadcasting values ​​of the host computer (1) are changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module (6) measures the output results respectively.

3. A detection method according to claim 2, characterized in that: The detection method also includes an audio output mode test of the left channel, and the test steps are as follows: Step B1, setting the USB C terminal of the host computer (1) to be connected to the USB C terminal of the product to be tested (8); Step B2, setting the input end of the audio module (6) to be connected to the left channel of the AUDIO JACK end of the product to be tested (8); Step B3, setting the four products to be tested (8) to be powered on at the same time; Step B4, setting the four products to be tested (8) to enter the audio output mode, that is, the audio signal enters from the USB C terminal and is converted by the products to be tested (8) and then output from the AUDIO JACK terminal, and the host computer (1) identifies the four test channels according to different SNs; Step B5, setting the left audio channels of the AUDIO JACK terminals of the four products to be tested (8) to be connected to a 3KR load; Step B6, setting the host computer (1) to broadcast and output a 1KHZ / 18dBFS audio signal to the USB C terminal of the product to be tested (8); Step B7, the input end of the audio module (6) measures the signal parameters of the left channel output of the AUDIO JACK end, and the test parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step B8: When the 1KHZ frequency remains unchanged, the broadcasting values ​​of the host computer (1) are changed to 12dBFS, 6dBFS, and 0dBFS respectively, and the input end of the audio module (6) measures the output results respectively.

4. A detection method according to claim 2, characterized in that: The detection method also includes an input mode test of the right channel, and the test steps are as follows: Step C1, setting the USB C terminal of the host computer (1) to be connected to the USB C terminal of the product to be tested (8); Step C2, setting the input end of the audio module (6) to be connected to the right channel of the AUDIO JACK end of the product to be tested (8); Step C3, setting the four products to be tested (8) to be powered on at the same time; Step C4, setting the four products to be tested (8) to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the products to be tested (8) and then output from the USB C end, and the host computer (1) identifies the four test channels according to different SNs; Step C5, setting the right channels of the AUDIO JACK terminals of the four products to be tested (8) to be connected to a 3KR load; Step C6, setting the host computer (1) to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product to be tested (8); Step C7, the host computer (1) records the audio signal of the right channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step C8: When the 1 kHz frequency remains unchanged, the broadcast parameter RMS of the audio module (6) is changed to 250 mVrms, 500 mVrms, and 1 Vrms respectively, and the host computer (1) records the audio signal of the right channel of the USB C terminal respectively, and then analyzes the recorded audio parameters.

5. A detection method according to claim 2, characterized in that: The detection method also includes an input mode test of the left channel, and the test steps are as follows: Step D1, setting the USB C terminal of the host computer (1) to be connected to the USB C terminal of the product to be tested (8); Step D2, setting the input end of the audio module (6) to be connected to the left channel of the AUDIO JACK end of the product to be tested (8); Step D3, setting the four products to be tested (8) to be powered on at the same time; Step D4, setting the four products to be tested (8) to enter the audio output mode, that is, the audio signal enters from the AUDIO JACK end and is converted by the products to be tested (8) and then output from the USB C end, and the host computer (1) identifies the four test channels according to different SNs; Step D5, setting the left audio channels of the AUDIO JACK terminals of the four products to be tested (8) to be connected to a 3KR load; Step D6, setting the host computer (1) to broadcast and output a 1KHZ / 125mVrms audio signal to the AUDIO JACK terminal of the product to be tested (8); Step D7, the host computer (1) records the audio signal of the left channel of the USB C terminal, and then analyzes the recorded audio parameters, where the analyzed parameters include audio indicators such as Freq, RMS, Vpp, THDN, and THD; Step D8, when the 1 kHz frequency remains unchanged, the broadcast parameter RMS of the audio module (6) is changed to 250 mVrms, 500 mVrms, and 1 Vrms respectively, and the host computer (1) records the audio signal of the left channel of the USB C terminal respectively, and then analyzes the recorded audio parameters.

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