Vehicle-mounted Bluetooth telephone testing method and device

Abstract

The invention discloses a vehicle-mounted Bluetooth telephone testing method. The method comprises the following steps of environment building before testing, wherein a vehicle to be tested is arranged in a testing environment; establishing connection between the mobile phone and the vehicle-mounted terminal through Bluetooth, and placing the mobile phone in a vehicle; a noise playback device is arranged inside and / or outside the vehicle; a sound pickup is arranged in the vehicle; establishing a call connection with the in-vehicle mobile phone through the far-end mobile phone, and activating a vehicle Bluetooth passing function through the vehicle-mounted terminal; a test starting step: after the test is started, turning on a noise playback device, and simulating a noise signal in a real driving scene by the noise playback device; the sound pick-up is used for collecting, storing and recording call voice information sent by the Bluetooth through a function. The device has the advantages that scene simulation is carried out in a noise collection-playback mode, the test efficiency is improved, the test cost is reduced, and the device can be used for testing in advance, finding potential problems in advance and reducing the research and development cost in the incompletely-shaped stage of a vehicle power system and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile testing, in particular to a vehicle-mounted Bluetooth phone testing method and device. BACKGROUND

[0002] The vehicle-mounted Bluetooth phone has become one of the essential configurations of a car. It is designed for driving safety and comfort. Through the Bluetooth connection between the vehicle-mounted device and the mobile phone, the driver can control the mobile phone without touching it, which is practical and greatly reduces the accident rate. However, if there are problems such as echo, intermittent, bottom noise, unclear speech, and small volume during the call, both parties have no willingness to communicate, and the user experience is not good. Therefore, the evaluation of Bluetooth phone call quality has always been a concern. Nowadays, the testing of Bluetooth phones by various car companies is mainly based on different speeds and different working conditions, relying on engineers to conduct road tests on real roads. However, this testing scenario has many variable factors and is highly dangerous.

[0003] For example, the patent CN113938862A vehicle-mounted Bluetooth device testing method, device, electronic device, and storage medium is a Bluetooth phone testing method conducted on real roads, which is dangerous and the environment is uncontrollable. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a vehicle-mounted Bluetooth phone testing method and device. The vehicle-mounted Bluetooth call is tested by simulation, improving the safety of the test.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows: a vehicle-mounted Bluetooth phone testing method, comprising the following steps:

[0006] Test environment setup: set the vehicle to be tested in the test environment; connect the mobile phone and the vehicle-mounted terminal through Bluetooth and place the mobile phone in the car; set a noise playback device in the car and / or outside the car; set a microphone in the car; establish a call connection between the remote mobile phone and the mobile phone in the car and activate the vehicle Bluetooth pass-through function through the vehicle-mounted terminal;

[0007] Test start step: after starting the test, turn on the noise playback device to simulate the noise signal in the real driving scenario; collect and record the call voice information transmitted through the Bluetooth pass-through function through the microphone.

[0008] The test environment is an environment with background noise below a set threshold.

[0009] An acoustic dummy is arranged on the driver's seat of the vehicle to be tested, and a microphone is arranged at the ear of the acoustic dummy to collect the voice signal transmitted by the vehicle-mounted terminal through the Bluetooth function.

[0010] A voice playing module is arranged at the dummy mouth, and the voice playing module reads and plays the voice in the preset voice database during the test.

[0011] A plurality of vehicle noises under various vehicle operating conditions are collected in advance, and parameters corresponding to the noises are set in a noise playback device, and the noise playback device plays the corresponding vehicle noises based on the parameters to simulate the noises generated when the vehicle is running.

[0012] The noise playback device includes a plurality of speakers arranged in the vehicle and / or outside the vehicle to simulate the acoustic noise inside or outside the vehicle.

[0013] The voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored, and the sound quality is evaluated, and the vehicle Bluetooth call effect is evaluated based on the sound quality evaluation result.

[0014] After the test is started, the opening and closing of the vehicle air conditioner are controlled according to the test requirements to match the noise of the noise playback device under the condition of superimposing the air conditioner working condition.

[0015] A vehicle Bluetooth phone test system includes a control module, an in-vehicle microphone, a remote microphone, a noise playback device, a voice playing module

[0016] After the environment is built, the control module drives the noise playback device to start working; at the same time, the in-vehicle microphone collects the voice signal played by the remote mobile phone through the vehicle terminal Bluetooth call function, and after the collection is completed, the voice playing module plays the preset voice, and then the remote microphone collects the voice signal played by the remote mobile phone on the remote mobile phone side; the voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored.

[0017] The system further includes an evaluation module, which sends the voice signals recorded and stored by the in-vehicle microphone and the remote microphone into the evaluation module to evaluate the sound quality and obtain the test result of the Bluetooth call.

[0018] The advantages of the present application are that the noise collection and playback method is used for scene simulation, the test efficiency is improved, the test cost is reduced, the test can be performed in advance during the stage of the vehicle power system and the like which is not completely determined, potential problems can be found in advance, and the device can reduce the research and development cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The contents expressed by each figure in the specification of the present application and the marks in the figures are briefly described as follows:

[0020] Figure 1 It is a schematic diagram of the vehicle Bluetooth phone test device of the present application;

[0021] Figure 2 It is a test flow step diagram of the present application.

[0022] The reference numerals in the figure are respectively: ① full-frequency loudspeaker; ② low-frequency loudspeaker; ③ vehicle-mounted terminal; ④ mobile phone; ⑤ artificial head; ⑥ loudspeaker equalization system; ⑦ Bluetooth telephone test system. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0024] The present application proposes a vehicle-mounted Bluetooth telephone test method and device, which adopts a noise collection-replay mode to simulate a scene, improve test efficiency, reduce test cost, can be tested in advance in the stage of incomplete vehicle power system, etc., find potential problems in advance, reduce research and development cost; the Bluetooth telephone test can be completed in the laboratory, greatly reducing the test risk.

[0025] The vehicle-mounted Bluetooth telephone test method provided in the embodiment comprises the following steps:

[0026] Test environment building before testing:

[0027] The vehicle to be tested is arranged in the test environment; the mobile phone and the vehicle-mounted terminal are connected through Bluetooth, and the mobile phone is placed in the vehicle; the noise playback device is arranged in the vehicle and / or outside the vehicle; the pickup is arranged in the vehicle; the remote mobile phone is connected with the mobile phone in the vehicle to establish a call connection, and the Bluetooth pass-through function of the vehicle-mounted terminal is activated.

[0028] Test starting step: after starting the test, the noise playback device is turned on to simulate the noise signal in the real driving scene; the call voice information emitted by the Bluetooth pass-through function is collected by the pickup and stored.

[0029] The test environment is an environment with background noise lower than the set threshold, which can be arranged in a quiet room to meet the test requirements.

[0030] An acoustic dummy is arranged on the vehicle to be tested, which is used to simulate the position of a normal person in the vehicle, so an acoustic dummy is arranged on the driver seat of the vehicle to be tested, a pickup is arranged at the ear of the acoustic dummy, which is called an in-vehicle pickup, to collect the voice signal emitted by the vehicle terminal through the Bluetooth function, simulate the voice signal heard by the human ear during the Bluetooth call process; further, a voice playing module is arranged at the mouth of the dummy, which reads the voice in the preset corpus and plays the voice during the test, and a remote pickup is used to pick up the voice signal played by the remote mobile phone, which is used to collect the voice signal of the human voice transmitted to the mobile network through Bluetooth during the Bluetooth call process and received by the remote end; the voice signals collected by the in-vehicle pickup and the remote pickup can obtain the voice quality of the Bluetooth call of the vehicle under the noise condition, and the quality of the Bluetooth call in the vehicle can be evaluated according to the quality of the voice signal, so as to adjust the vehicle components related to the Bluetooth function in the vehicle, guide the vehicle function research and development and upgrade.

[0031] The core of the scheme is to simulate the noise signal in the running state under the condition that the vehicle is stationary, so the playback of the noise is the key, and the noise playback device arranged in the embodiment is used to simulate the noise state of the vehicle under various working conditions; the vehicle noise under various vehicle running working conditions is collected in advance, and the parameters corresponding to the noise are set in the noise playback device, and the corresponding vehicle noise is played by the noise playback device based on the parameters to simulate the noise generated when the vehicle runs.

[0032] The noise playback device includes a core controller, a loudspeaker and the like; the core controller drives the loudspeaker to emit sound with corresponding timbre and loudness to simulate the noise environment. The noise playback device includes a plurality of loudspeakers arranged in the vehicle and / or outside the vehicle, which simulates the acoustic noise in or outside the vehicle. Since the noise of the vehicle includes wind noise, tire noise, mechanical noise and the like, the positions of the loudspeakers are set according to the positions where the noise is generated, such as the position where the tire noise is generated near the tire, which is transmitted to the vehicle through the vehicle chassis and the like, so a loudspeaker is arranged near the tire of the vehicle to simulate the tire noise, and the wind noise is generated on the whole vehicle, so the loudspeakers can be uniformly arranged on the surface of the vehicle to simulate the wind noise. The corresponding noise is emitted by the plurality of loudspeakers of the noise playback device, so that the vehicle is in the noise state during the test, and a simulation environment is provided for the Bluetooth call quality test.

[0033] After the simulation environment is built, the next step is to test. After starting the test, the microphone will collect the voice signal during the call. The voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored, and the sound quality is evaluated. Based on the sound quality evaluation result, the Bluetooth call effect of the vehicle is evaluated. The collected voice signals are stored in the database, and then the collected voice signals are analyzed and evaluated after the test is completed, so as to obtain the sound quality evaluation result of the voice signal. According to the evaluation structure, the research and development and improvement of the vehicle can be guided in reverse until the Bluetooth call quality meets the requirements, and the research and development quality and effect are improved.

[0034] After starting the test, the opening and closing of the vehicle-mounted air conditioner are controlled according to the test requirements to match the noise played by the noise playback device under the condition that the air conditioner is working. In the simulation simulation, in addition to the noise played by the noise playback device, some noise signals may also be generated by the operation of the air conditioner. Therefore, the air conditioner is linked to test the call quality, and the Bluetooth call quality under different noises is tested.

[0035] In the Bluetooth call quality test method in this embodiment, after starting the test step, the following test control step is entered:

[0036] The test is divided into multiple sub-processes, and each sub-process includes different noise played by the noise playback device and different opening states of the air conditioner. Specifically, the following is included:

[0037] 1. Simulate the static vehicle noise and play it by the noise playback device, and the air conditioner is not turned on. Then the corresponding voice signals are collected by the in-vehicle microphone and the remote microphone.

[0038] 2. Simulate the static vehicle noise and play it by the noise playback device, and the air conditioner is turned on and the gear is in different gears. Then the corresponding voice signals are collected by the in-vehicle microphone and the remote microphone.

[0039] 3. Simulate the vehicle noise when the vehicle drives at a speed according to the city working condition, and play it by the noise playback device, and the air conditioner is not turned on. Then the corresponding voice signals are collected by the in-vehicle microphone and the remote microphone.

[0040] 4. Simulate the vehicle noise when the vehicle drives at a speed according to the city working condition, and play it by the noise playback device, and the air conditioner is turned on and the gear is in different gears. Then the corresponding voice signals are collected by the in-vehicle microphone and the remote microphone.

[0041] 5. Simulate the vehicle noise when the vehicle drives at a speed according to the high-speed working condition, and play it by the noise playback device, and the air conditioner is not turned on. Then the corresponding voice signals are collected by the in-vehicle microphone and the remote microphone.

[0042] 6, simulate the vehicle noise when the vehicle travels at high speed under the high-speed working condition, and play by the noise playback device, the air conditioner is opened at different gears; then the corresponding voice signals are collected through the in-vehicle microphone and the remote microphone;

[0043] Six groups of voice signals collected through the above six sub-processes are respectively subjected to sound quality evaluation, and whether the current vehicle meets the Bluetooth call requirement is judged according to the sound quality evaluation result; if the requirement cannot be met, the vehicle is guided to upgrade iteration, thereby providing basic data for research and development.

[0044] A vehicle-mounted Bluetooth telephone test system corresponding to each hardware involved in the test system in the application, comprising a control module, an in-vehicle microphone, a remote microphone, a noise playback device, a voice playback module and an evaluation module;

[0045] After the environment is built, the control module drives the noise playback device to start working; at the same time, the voice signal played by the remote mobile phone through the vehicle-mounted terminal Bluetooth call function is collected through the in-vehicle microphone, after the collection is completed, the voice playback module is controlled to play the preset expectation, and then the voice signal played by the remote mobile phone is collected through the remote microphone on the remote mobile phone side; the voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored. The voice signals recorded and stored by the in-vehicle microphone and the remote microphone are sent to the evaluation module for sound quality evaluation to obtain the test result of the Bluetooth call. The control module can be connected with each module in a wired or wireless manner, and coordinate the working state of each module, so as to realize the test steps of the Bluetooth call quality.

[0046] The embodiment proposes a device for scene simulation by using noise collection and playback, improving test efficiency and reducing test cost, which can be used in the stage of incomplete vehicle power system, to test in advance, find potential problems in advance and reduce research and development cost.

[0047] The test method disclosed by the application is used in a relatively quiet room, the vehicle-mounted terminal and the mobile phone are connected, noise collection and playback technology is used to simulate environmental noise, irrelevant noise interference is reduced, the sound quality of the sound quality evaluation result is good, and the sound quality of the sound quality evaluation result is good. The test is well assisted in research and development, and the schematic diagram is as shown in the accompanying Figure 1 .

[0048] Further, the quiet room refers to that the background noise is lower than a certain range, so that the surrounding environmental noise will not affect the test. It can be a semi-anechoic chamber, or a room paved with soundproof materials.

[0049] Further, the vehicle-mounted terminal and the mobile phone are connected, which is generally connected through Bluetooth, and can also be realized through other ways.

[0050] Further noise collection and playback system, comprising noise collection and noise playback.

[0051] Noise collection mainly uses a pickup to collect dynamic noise (static condition, urban condition, and high speed condition). Generally, a dummy with binaural pickup function is used.

[0052] Noise playback mainly uses multiple speakers distributed at different positions in the vehicle to reproduce the acoustic background noise in the vehicle. The positions should be carefully positioned to reduce the interference of the transmission path between the speakers, the hands-free microphone, and the simulation head of the driver's seat, and the speakers should not resonate. Before testing, the speaker group should be equalized.

[0053] Further, during testing, the acoustic dummy plays the recorded corpus, and the feedback is given outside the vehicle. After the vehicle sound is emitted, the sound is picked up by the binaural ears of the acoustic dummy, and the sound signal is analyzed and evaluated in the Bluetooth test system. The Bluetooth test system can test the voice according to the test standard to obtain the test result.

[0054] Further, the background noise playback system and the recording process in the measurement system are time-synchronized to ensure the reproducibility of the recording in the presence of noise.

[0055] The overall test process is attached Figure 2 In a semi-anechoic chamber (background noise < 20 dB), the whole vehicle enters the anechoic chamber. First, prepare all the equipment required for the test and connect them according to the method attached Figure 1 ; second, turn on the Bluetooth of the vehicle terminal and connect it with the mobile phone; the rest of the equipment can work normally.

[0056] The artificial head mainly simulates the speaking and listening of the driver. "Speaking" uses the artificial head to play the recorded corpus. "Listening" because both ears are equipped with a pickup. Because traditional microphones cannot accurately collect acoustic signals, the results measured are not the sound actually heard by the human ear. Not only is the spatial information lacking, but also the influence of the human body on the sound field (when the human ear listens to sound, the shoulders, head, and pinna will change the sound field to a certain extent, such as reflection and diffraction, and the brain will judge the position of the sound source according to memory), using an artificial head to simulate the human head can more truly restore the sound heard by the human ear.

[0057] When collecting noise, there are mainly 4 working conditions involved. Static speed v = 0 km / h, air conditioner fan not turned on; urban working condition speed v = 60 km / h, wind speed set to medium; high speed working condition speed v = 120 km / h, air conditioner fan not turned on; high speed working condition speed v = 120 km / h, wind speed set to medium.

[0058] The noise playback is realized by 5 loudspeakers, including 4 full-frequency loudspeakers and 1 bass loudspeaker, which are arranged in a manner as shown in the figure Figure 2 The multiple loudspeaker layout is arranged around the interior of the whole vehicle, a good sound field can be established, the playback sound is more stereo, and is closer to the real environment; and because the frequency of the noise (road noise, tire noise, wind noise, etc.) is mainly low frequency, the low-frequency performance can be better by adding the bass loudspeaker.

[0059] Obviously, the specific implementation of the present application is not limited by the above manner, and various non-essential improvements made by adopting the method concept and technical scheme of the present application are within the protection scope of the present application.

Claims

1. A method for testing a Bluetooth phone in a vehicle, the method comprising: Comprising the following steps: Test environment building: set the vehicle to be tested in the test environment; connect the mobile phone and the vehicle terminal through Bluetooth and place the mobile phone in the vehicle; set noise playback devices in and / or outside the vehicle; set a microphone in the vehicle; establish a call connection between the remote mobile phone and the mobile phone in the vehicle and activate the vehicle Bluetooth pass-through function through the vehicle terminal; Test starting step: after starting the test, turn on the noise playback device to simulate the noise signal in the real driving scene; collect and store the voice information transmitted through the Bluetooth pass-through function through the microphone.

2. The method of claim 1, wherein: The test environment is an environment with background noise below a set threshold.

3. The in-vehicle Bluetooth phone testing method as described in claim 1, characterized in that: An acoustic dummy is arranged on the driver's seat of the vehicle to be tested, and a microphone is arranged at the ear of the acoustic dummy to collect the voice signal transmitted by the vehicle terminal through the Bluetooth function.

4. The method of claim 3, wherein: A voice playback module is arranged at the mouth of the dummy, which reads and plays the voice in the preset corpus during the test, and the remote mobile phone plays the voice signal through the remote microphone.

5. The method of claim 1-4, wherein: A variety of vehicle noise under various vehicle operating conditions is collected in advance, and the corresponding parameters of the noise are set in the noise playback device, and the corresponding vehicle noise is played based on the parameters to simulate the noise generated during vehicle operation.

6. The method of claim 5, wherein: The noise playback device includes a plurality of speakers arranged in and / or outside the vehicle to simulate the acoustic noise in and / or outside the vehicle.

7. The method of claim 1 or 4, wherein: The voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored, and the sound quality is evaluated, and the vehicle Bluetooth call effect is evaluated based on the sound quality evaluation result.

8. The method of claim 1-7, wherein: After the test is started, the opening and closing of the vehicle air conditioner are controlled according to the test requirements to match the noise of the noise playback device under the condition of superimposing the air conditioner working condition.

9. An in-vehicle Bluetooth phone test system, characterized by: It includes a control module, an in-vehicle microphone, a remote microphone, a noise playback device, and a voice playback module After the environment is built, the control module drives the noise playback device to start working; at the same time, the voice signal played by the remote mobile phone through the vehicle terminal Bluetooth call function is collected through the in-vehicle microphone, and after the collection is completed, the preset voice is played through the voice playback module, and then the voice signal played by the remote mobile phone is collected through the remote microphone on the remote mobile phone side; the voice signals collected by the in-vehicle microphone and the remote microphone are recorded and stored.

10. The Bluetooth phone test system for in-vehicle use according to claim 9, wherein: The system further comprises an evaluation module, which sends the voice signals recorded and stored by the in-vehicle microphone and the remote microphone into the evaluation module for sound quality evaluation to obtain the test result of the Bluetooth call.

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