Testing Method, Device, System and Storage Medium for In-vehicle Entertainment Equipment

Abstract

The present invention relates to a method, device, system and storage medium for testing an in-vehicle entertainment device, including: determining the network mode to be tested of a communication module, as well as the communication frequency band and signal strength value corresponding to the network mode to be tested, dividing them into multiple test parameter groups, controlling the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple functional modules to be tested, monitoring the radio frequency signals and the interference conditions of the functional modules to be tested in response to the radio frequency signals, regulating the current test parameter group of the radio frequency signals until the target test parameter group of the radio frequency signals against which the functional modules to be tested are interference-resistant is determined, and generating an anti-interference test result of the functional modules to be tested. The present invention utilizes the communication module in the in-vehicle entertainment device to controllably output radio frequency signals as interference signals for electromagnetic interference testing, obtains the electromagnetic anti-interference test results of each functional module to be tested, and realizes a comprehensive and effective test of the electromagnetic anti-interference capabilities of each functional module in the in-vehicle entertainment device.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment testing, and particularly to a method, device, system and storage medium for testing in-vehicle entertainment equipment. Background Art

[0002] Traditional in-vehicle entertainment equipment only has basic functions such as local radio reception, and gradually cannot meet the needs of the public. With the increasing demand for intelligent vehicle experience by users, traditional in-vehicle entertainment equipment has been gradually replaced by in-vehicle entertainment equipment integrating multiple functions such as music, video, navigation, Bluetooth, network, and panoramic imaging. Currently, most in-vehicle entertainment equipment has rich and diverse functions, connects to many external loads, and integrates multiple hardware module circuits on the circuit board. When driving in some special scenarios, such as underground garages or remote mountainous areas, the panoramic imaging screen will occasionally flash, and the speaker will emit strange noises such as 'cha', 'cha'. After analysis, it is found that in a weak network or no-network environment, in-vehicle entertainment equipment will increase its own communication signal transmission power to maintain signal transmission with external mobile communication base stations. The relatively large transmission power brings stronger electromagnetic interference, resulting in electromagnetic self-interference problems of the product. Among them, the electromagnetic self-interference problems of in-vehicle entertainment equipment are mostly manifested as problems such as screen flashing, audio stuttering, and noise, which are easily perceived by users and cause complaints.

[0003] Currently, electromagnetic interference testing is usually divided into two types: electromagnetic interference spatial injection and harness injection. Specifically, interference signals are injected into hardware devices by setting an electromagnetic interference space, or interference signals are injected into one of the cables connected to the device for communication, so as to test the electromagnetic interference situation of the device. However, since the usually injected is a single-frequency interference signal in MHz, there is a large difference between this single-frequency interference signal and the actual electromagnetic interference signal in in-vehicle entertainment equipment, and it is impossible to comprehensively and fully simulate the actual electromagnetic interference situation, further affecting the accuracy of electromagnetic interference testing of in-vehicle entertainment equipment. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a method for testing in-vehicle entertainment equipment to solve the problem that the current electromagnetic interference testing method of injecting single-frequency interference signals cannot comprehensively and fully simulate the actual electromagnetic interference situation and affects the accuracy of electromagnetic interference testing of in-vehicle entertainment equipment; the second purpose is to provide a device for testing in-vehicle entertainment equipment; the third purpose is to provide a system for testing in-vehicle entertainment equipment; the fourth purpose is to provide a storage medium.

[0005] In order to achieve the above purposes, the technical solutions adopted by the present invention are as follows:

[0006] A first aspect of an embodiment of the present invention provides a method for testing an in-vehicle entertainment device, which is applied to a test device end. The test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The method includes:

[0007] Determine the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode;

[0008] Divide the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested function modules;

[0009] Monitor the radio frequency signals and the interference situation of the to-be-tested function modules in response to the radio frequency signals;

[0010] According to the interference situation of the to-be-tested function modules in response to the radio frequency signals, adjust the current test parameter group of the radio frequency signals until the target test parameter group of the radio frequency signals that the to-be-tested function modules are resistant to interference is determined; wherein, the target test parameter group includes the target communication frequency band and signal strength threshold under different network modes;

[0011] Generate an anti-interference test result of the to-be-tested function module according to the target test parameter group of the radio frequency signals that the to-be-tested function module is resistant to interference.

[0012] Optionally, the determining the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, includes:

[0013] Obtain the network mode of the communication module of the in-vehicle entertainment device; wherein, the network mode of the communication module includes at least one of multiple network modes;

[0014] Determine the to-be-tested network mode of the communication module among the network modes according to the test requirements of the to-be-tested function module;

[0015] Determine the communication frequency band and signal strength value corresponding to the to-be-tested network mode according to the pre-set corresponding relationship between the network mode and the communication frequency band and signal strength value.

[0016] Optionally, the input end of the test device includes a comprehensive tester. The dividing the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, controlling the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple to-be-tested function modules includes:

[0017] Divide the to-be-tested network mode, the corresponding communication frequency band and signal strength value of the to-be-tested network mode into multiple test parameter groups, and generate signal control signaling according to the test parameter groups;

[0018] Send the signal control signaling to the communication module through the comprehensive tester, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested functional modules.

[0019] Optionally, after sending the signal control signaling to the communication module through the comprehensive tester, controlling the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple to-be-tested functional modules, it further includes:

[0020] Verify the radio frequency signal output by the communication module through the comprehensive tester, and determine whether the radio frequency signal meets the signal parameters in the test parameter group;

[0021] If not, generate a signal regulation instruction, and regulate the parameters of the radio frequency signal of the communication module to the signal parameters in the test parameter group according to the signal regulation instruction.

[0022] Optionally, the test device includes a spectrum analyzer, and the monitoring of the radio frequency signal and the interference situation of the to-be-tested functional module in response to the radio frequency signal includes:

[0023] Perform spectrum monitoring on the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal and the communication frequency band and signal strength value during the transmission of the radio frequency signal;

[0024] When it is monitored that the radio frequency signal is transmitted to the to-be-tested functional module, monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal.

[0025] Optionally, the test device further includes a first coupling capacitor and a second coupling capacitor, the spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor, and before performing spectrum monitoring on the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal and the communication frequency band and signal strength value during the transmission of the radio frequency signal, it further includes:

[0026] Pre-regulate the monitoring frequency band range of the spectrum analyzer, and the capacitance values of the first coupling capacitor and the second coupling capacitor;

[0027] Pass the radio frequency signal through the first coupling capacitor and the second coupling capacitor to control the communication frequency band of the radio frequency signal within the monitoring frequency band range of the spectrum analyzer.

[0028] Optionally, the input end of the test device further includes a radio frequency step attenuator, and adjusting the current test parameter set of the radio frequency signal according to the interference condition of the functional module under test in response to the radio frequency signal until a target test parameter set of the radio frequency signal against which the functional module under test is resistant to interference is determined, including:

[0029] Determining whether to adjust the current test parameter set of the radio frequency signal according to the interference condition of the functional module under test in response to the radio frequency signal;

[0030] In the case of determining to perform test parameter set adjustment on the radio frequency signal, updating the communication frequency band in the current test parameter set, and using the radio frequency step attenuator to attenuate the signal strength value of the radio frequency signal according to a preset attenuation level;

[0031] Monitoring the interference condition of the functional module under test in response to the radio frequency signal after signal strength attenuation until a target communication frequency band and signal strength threshold of the radio frequency signal against which the functional module under test is resistant to interference are determined.

[0032] Optionally, the communication module of the in-vehicle entertainment device includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module, and the functional module under test of the in-vehicle entertainment device includes at least one of a power amplifier module, a radio module, and a panoramic module.

[0033] Optionally, after generating the anti-interference test result of the functional module under test according to the target test parameter set of the radio frequency signal against which the functional module under test is resistant to interference, further including:

[0034] Uploading the anti-interference test result of the functional module under test to the host computer, and controlling the actual radio frequency signal of the communication module according to the anti-interference test result.

[0035] A second aspect of the embodiments of the present invention provides an in-vehicle entertainment device test apparatus, which is applied to the test device end. The test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a functional module under test. The communication module is connected to the input end of the test device, and the functional module under test is connected to the output end of the test device. The apparatus includes:

[0036] A determining test parameter module, configured to determine the network system to be tested of the communication module and the communication frequency band and signal strength value corresponding to the network system to be tested;

[0037] A control output module, configured to divide the to-be-tested network mode, the corresponding communication frequency band and signal strength value of the to-be-tested network mode into multiple test parameter groups, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested functional modules;

[0038] A monitoring interference module, configured to monitor the radio frequency signals and the interference conditions of the to-be-tested functional modules in response to the radio frequency signals;

[0039] A signal regulation module, configured to regulate the current test parameter group of the radio frequency signal according to the interference conditions of the to-be-tested functional modules in response to the radio frequency signal until a target test parameter group of the radio frequency signal with anti-interference ability of the to-be-tested functional module is determined; wherein, the target test parameter group includes a target communication frequency band and a signal strength threshold under different network modes;

[0040] A test result generation module, configured to generate an anti-interference test result of the to-be-tested functional module according to the target test parameter group of the radio frequency signal with anti-interference ability of the to-be-tested functional module.

[0041] A third aspect of the embodiments of the present invention provides a vehicle-mounted entertainment device test system, the system includes a vehicle-mounted entertainment device and a test device, the vehicle-mounted entertainment device includes a communication module and a to-be-tested functional module, the communication module is connected to the input end of the test device, and the to-be-tested functional module is connected to the output end of the test device, including:

[0042] The test device includes a comprehensive tester, a radio frequency step attenuator, a first coupling capacitor, a second coupling capacitor and a spectrum analyzer. The input end of the test device includes a comprehensive tester and a radio frequency step attenuator. The radio frequency step attenuator is connected in series with the first coupling capacitor and the second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device;

[0043] The comprehensive tester determines the to-be-tested network mode of the communication module and the corresponding communication frequency band and signal strength value of the to-be-tested network mode, divides the to-be-tested network mode and the corresponding communication frequency band and signal strength value of the to-be-tested network mode into multiple test parameter groups, controls the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmits them to multiple to-be-tested functional modules;

[0044] The spectrum analyzer monitors the radio frequency signals and the interference conditions of the to-be-tested functional modules in response to the radio frequency signals;

[0045] The radio frequency step attenuator adjusts the current test parameter set of the radio frequency signal according to the interference condition of the to-be-tested functional module in response to the radio frequency signal until the target test parameter set of the radio frequency signal against which the to-be-tested functional module is immune to interference is determined; wherein, the target test parameter set includes the target communication frequency band and the signal strength threshold under different network modes.

[0046] The test device is used to generate the anti-interference test result of the to-be-tested functional module according to the target test parameter set of the radio frequency signal against which the to-be-tested functional module is immune to interference.

[0047] In a fourth aspect of the embodiments of the present invention, a readable storage medium is provided. A computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the vehicle-mounted entertainment device test method described in the first aspect of the embodiments of the present invention are implemented.

[0048] Advantages of the present invention:

[0049] In the vehicle-mounted entertainment device test method provided by the embodiments of the present invention, the test device determines the to-be-tested network mode of the communication module, as well as the communication frequency band and the signal strength value corresponding to the to-be-tested network mode, divides the to-be-tested network mode, as well as the communication frequency band and the signal strength value corresponding to the to-be-tested network mode, into multiple test parameter sets, controls the communication module to sequentially output radio frequency signals corresponding to the test parameter sets and transmit them to multiple to-be-tested functional modules, monitors the radio frequency signals and the interference conditions of the to-be-tested functional modules in response to the radio frequency signals, adjusts the current test parameter set of the radio frequency signal according to the interference conditions of the to-be-tested functional modules in response to the radio frequency signals until the target test parameter set of the radio frequency signal against which the to-be-tested functional module is immune to interference is determined. The target test parameter set includes the target communication frequency band and the signal strength threshold under different network modes. According to the target test parameter set of the radio frequency signal against which the to-be-tested functional module is immune to interference, the anti-interference test result of the to-be-tested functional module is generated. In the embodiments of the present invention, the communication module in the vehicle-mounted entertainment device is used to controllably output radio frequency signals of various network modes, communication frequency bands, and signal strengths as interference signals for electromagnetic interference testing. The test device transmits the interference signals to each to-be-tested functional module in the vehicle-mounted entertainment device, can flexibly and fully simulate the actual communication interference conditions of the vehicle-mounted entertainment device, and by monitoring the electromagnetic interference conditions of each to-be-tested functional module under different interference signals, the test parameters of the interference signals are adjusted in real time, and the electromagnetic anti-interference test results of each to-be-tested functional module under interference signals of different network modes and different communication frequency bands are obtained, greatly improving the test accuracy of the vehicle-mounted entertainment device, realizing a comprehensive and effective test of the electromagnetic anti-interference capabilities of each functional module in the vehicle-mounted entertainment device, and further improving the reliability of the production and operation of the vehicle-mounted entertainment device products. Description of the Drawings

[0050] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 is the flowchart of the steps of a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention;

[0052] Figure 2 is Figure 1 the flowchart of step 101 of a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention in;

[0053] Figure 3 is Figure 1 the flowchart of step 102 of a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention in;

[0054] Figure 4 is Figure 1 the flowchart of step 103 of a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention in;

[0055] Figure 5 is Figure 1 the flowchart of step 104 of a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention in;

[0056] Figure 6 is the structural block diagram of a device for testing an in-vehicle entertainment device provided by an embodiment of the present invention;

[0057] Figure 7 is the structural schematic diagram of an in-vehicle entertainment device in a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention;

[0058] Figure 8 is the structural block diagram of a system for testing an in-vehicle entertainment device provided by an embodiment of the present invention. Specific Embodiments

[0059] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0060] Refer to Figure 1, which shows the step flowchart of the in-vehicle entertainment device testing method provided by the embodiments of the present invention, is applied to the test device side. The test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The method may include:

[0061] Step 101, determine the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode.

[0062] In the embodiments of the present invention, to solve the problem that the current method of setting an electromagnetic interference space or injecting a single-frequency interference signal into one of the cables connected to the device for communication to test the electromagnetic interference situation of the device cannot comprehensively and fully simulate the actual electromagnetic interference situation and affect the accuracy of the electromagnetic interference test of the in-vehicle entertainment device, the present invention controllably outputs radio frequency signals of various network modes, communication frequency bands, and signal strengths through the communication module in the in-vehicle entertainment device as interference signals for the electromagnetic interference test, uses the test device to transmit the interference signals to each to-be-tested function module in the in-vehicle entertainment device, flexibly and fully simulates the actual communication interference situation of the in-vehicle entertainment device, monitors the electromagnetic interference situation of each to-be-tested function module under different interference signals, and adjusts the test parameters of the interference signals in real time to obtain the electromagnetic anti-interference test results of each to-be-tested function module under the interference signals of different network modes and different communication frequency bands, greatly improving the test accuracy of the in-vehicle entertainment device, realizing a comprehensive and effective test of the electromagnetic anti-interference capabilities of each function module in the in-vehicle entertainment device, and further improving the reliability of the production and operation of the in-vehicle entertainment device products.

[0063] It should be noted that the execution subject of the embodiments of the present invention is the test device side. The test device side includes multiple test components. The test device is connected to the in-vehicle entertainment device for testing the in-vehicle entertainment device. Among them, the test device includes a comprehensive tester, a radio frequency step attenuator, a first coupling capacitor, a second coupling capacitor, and a spectrum analyzer. The input end of the test device includes the comprehensive tester and the radio frequency step attenuator. The radio frequency step attenuator is connected in series with the first coupling capacitor and the second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The communication module includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module. The to-be-tested function module is other function modules outside the communication module, such as at least one of a power amplifier module, a radio module, and a panoramic module. The test device is used to effectively test the anti-electromagnetic interference capabilities of function modules such as audio and video display using the radio frequency signals of the communication module.

[0064] Reference Figure 7 , which shows a schematic structural diagram of an in-vehicle entertainment device in a method for testing an in-vehicle entertainment device provided by an embodiment of the present invention. The in-vehicle entertainment device includes a power supply module, an electronic control unit, a communication module, and a plurality of to-be-tested function modules. The communication module is connected to communication antennas for 2G / 3G / 4G / 5G. The communication module includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module. The to-be-tested function modules include at least one of a power amplifier module, a radio module, and a panoramic module. Among them, the in-vehicle entertainment device is connected to a speaker, a camera, and a universal serial bus socket through a wire harness. When performing a test, a 12V stable power supply is provided to the in-vehicle entertainment device through a storage battery or other voltage stabilizers. It is confirmed that the speaker can play audio normally and the display screen can display the picture taken by the camera normally. Details are not described one by one here.

[0065] It should be noted that the in-vehicle entertainment device contains a variety of function modules inside. Among them, the communication module has a relatively large external transmission power, and the internal circuit is more at risk of being affected by its electromagnetic interference. Therefore, in this embodiment, the radio frequency signal generated by the communication module is used to perform an electromagnetic interference resistance test on other function modules. It should be noted that the network mode of the communication module includes at least one of multiple network modes. The network modes of different communication modules are different. Taking the network communication module as an example of the communication module for illustration, due to different registered network operators of the in-vehicle entertainment device, there will be differences in the supported network communication bands and network modes. When the communication module of the in-vehicle entertainment device supports multiple network modes such as 2G, 3G, 4G, and 5G, in order to test the anti-interference ability of the radio frequency signal of the to-be-tested function module under different network modes, the test device determines the to-be-tested network mode of the communication module according to the test requirements of the to-be-tested function module, and determines the communication band and signal strength value corresponding to the to-be-tested network mode based on the pre-set correspondence between the network mode, the communication band, and the signal strength value.

[0066] In this embodiment, since the communication band range of the radio frequency signal that the network communication module can transmit is concentrated in several hundred MHz to several GHz, according to the principle that signals of the same frequency are vulnerable to interference, it can be determined that the signal circuits in the device that transmit signals through the communication band from MHz to GHz belong to sensitive circuits for electromagnetic interference. Taking the in-vehicle entertainment device as an example, signals that are easily affected by electromagnetic interference include LVDS signals (the communication band range is mostly between 200 MHz and 1500 MHz), camera video signals (the communication band range is mostly between 1000 MHz and 3000 MHz), and A2B audio signals (the communication band range is mostly within several tens of MHz). Therefore, it can be determined that the to-be-tested function modules of the in-vehicle entertainment device include the radio module corresponding to the LVDS signal, the panoramic module corresponding to the camera video signal, and the power amplifier module corresponding to the A2B audio signal.

[0067] Step 102: Divide the network mode to be tested, the corresponding communication frequency band and signal strength value of the network mode to be tested into multiple test parameter groups, and control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups and transmit them to multiple functional modules to be tested.

[0068] In the embodiment of the present invention, in order to control the network communication module to sequentially and fixedly work in each communication frequency band and trigger the maximum transmission power, and test whether there are abnormalities in the panoramic picture and audio of the in-vehicle entertainment device, the network mode to be tested, the corresponding communication frequency band and signal strength value of the network mode to be tested are divided into multiple test parameter groups. Each test parameter group includes a section of communication frequency band and signal strength value under one network mode, so as to control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups and transmit them to multiple functional modules to be tested. In this embodiment, the test device regulates the radio frequency signal input by the communication module to the test device, and controls the communication module to output the radio frequency signal of the network mode to be tested and the corresponding communication frequency band and signal strength value. Specifically, the communication module can be adjusted to the signal parameters in the test parameter group by a comprehensive tester to output the radio frequency signal.

[0069] In this embodiment, the input end of the test device includes a comprehensive tester. During the test, first disconnect the 2G / 3G / 4G / 5G communication antennas connected to the internal communication module of the in-vehicle entertainment device, and connect the comprehensive tester to the communication module of the in-vehicle entertainment device through a radio frequency cable. Specifically, the comprehensive tester can control the communication module to be in any network mode of 2G / 3G / 4G / 5G, any communication frequency band and the transmission power of different signal strengths. According to the actual test requirements, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups and transmit the radio frequency signals to multiple functional modules to be tested.

[0070] Specifically, during the test, the communication module is connected to the input end of the test device, and the functional module to be tested is connected to the output end of the test device. The functional module to be tested includes at least one of a power amplifier module, a radio receiving module, and a panoramic module. The test device is used to effectively test the electromagnetic interference resistance ability of functional modules such as audio and video display by using the radio frequency signal of the communication module. For example, the output end of the test device can be connected to the input pin of the A2B signal trace of the power amplifier module inside the in-vehicle entertainment device to realize the transmission of the radio frequency signal to the power amplifier module; the output end of the test device can be connected to the input pin of the signal trace of the coaxial cable core connected to the panoramic module in the in-vehicle entertainment device to realize the transmission of the radio frequency signal to the panoramic module, which will not be elaborated one by one here.

[0071] Step 103: Monitor the radio frequency signal and the interference situation of the functional module to be tested in response to the radio frequency signal.

[0072] In an embodiment of the present invention, the input end of the test device further includes a radio frequency step attenuator. The communication module in the in-vehicle entertainment device is connected to the radio frequency step attenuator through a radio frequency port and a radio frequency cable. The radio frequency step attenuator is connected in series with a first coupling capacitor and a second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device, and the functional module to be tested is connected to the output end of the test device.

[0073] Specifically, the radio frequency signal sent by the communication module is transmitted to the test device, and continues to be transmitted to the functional module to be tested through the output end of the test device via the radio frequency step attenuator of the test device. To test the anti-interference ability of the functional module to be tested against the radio frequency signal, the test device monitors the radio frequency signal and the interference situation of the functional module to be tested in response to the radio frequency signal. It should be noted that the test device monitors the radio frequency signal to determine whether the transmission state of the radio frequency signal is normal, and to determine the signal strength and communication frequency band of the radio frequency signal during transmission. The interference situation of the functional module to be tested in response to the radio frequency signal is monitored, and the interference situation includes the presence of interference and no interference, which is specifically determined according to the actual functional module to be tested. For example, the power amplifier module in the in-vehicle entertainment device is used to output audio signals. When the in-vehicle entertainment device is clicked to play audio, the interference situation of the power amplifier module in response to the radio frequency signal may include no audio stuttering, audio stuttering, no noise, and noise; the panoramic module in the in-vehicle entertainment device is used to output video signals, then the interference situation of the panoramic module in response to the radio frequency signal may include the presence of screen flickering, no screen flickering, etc.

[0074] It should be noted that the spectrum analyzer in the test device of this embodiment is used to monitor the radio frequency signal and the interference situation of the functional module to be tested in response to the radio frequency signal. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. The monitoring frequency band range of the spectrum analyzer is adjusted to completely cover the communication frequency band of the radio frequency signal. In some embodiments, the interference situation of the functional module to be tested in response to the radio frequency signal can be monitored by other audio and video signal monitors or by manual observation by the tester. This embodiment does not make specific limitations in this regard.

[0075] Step 104: According to the interference situation of the functional module to be tested in response to the radio frequency signal, adjust the current test parameter group of the radio frequency signal until the target test parameter group of the radio frequency signal with anti-interference ability of the functional module to be tested is determined; wherein, the target test parameter group includes the target communication frequency band and signal strength threshold under different network systems.

[0076] In an embodiment of the present invention, the functional module to be tested is connected to the output end of the test device. According to the interference situation of the functional module to be tested in response to the radio frequency signal, the test device updates the communication frequency band in the current test parameter group, and regulates the signal strength value of the radio frequency signal through a radio frequency step attenuator, regulates the signal strength value of the radio frequency signal, and uses the regulated radio frequency signal to perform an anti-interference test on the functional module to be tested in real time until the target communication frequency band and signal strength threshold of the radio frequency signal for anti-interference of the functional module to be tested are determined under different network systems.

[0077] It should be noted that the radio frequency step attenuator at the input end of the test device is an electronic device used to precisely control the radio frequency signal strength. Its core function is to gradually reduce the transmission power of the radio frequency signal, that is, the signal strength value, through an adjustable signal attenuation amount. In the electromagnetic anti-interference test between modules in this embodiment, it can realize testing the anti-interference ability of the functional module to be tested in the in-vehicle entertainment device in an interference environment of radio frequency signals with different signal strengths. Specifically, through components such as a resistor network or PIN diodes, part of the energy of the input radio frequency signal is converted into heat energy to achieve a stepped attenuation of the signal strength (such as 1 dB each time). Among them, the attenuation amount of the signal strength can be adjusted and set through mechanical switches, electronic controls, or programmed control methods. In the test, it is usually attenuated step by step with a fixed step (such as 1 dB). This embodiment does not make specific limitations on this.

[0078] Specifically, according to the interference situation of the functional module to be tested in response to the radio frequency signal, it is determined whether to regulate the current test parameter group of the radio frequency signal. If the interference situation of the functional module to be tested in response to the radio frequency signal is that there is interference, it is determined to perform a test parameter group regulation on the radio frequency signal, update the communication frequency band in the current test parameter group, use the radio frequency step attenuator to perform a signal strength attenuation regulation on the signal strength value of the radio frequency signal according to the attenuation amount, and monitor the interference situation of the functional module to be tested in response to the radio frequency signal after the signal strength attenuation until the target communication frequency band and signal strength threshold of the radio frequency signal for anti-interference of the functional module to be tested are determined. That is, when the radio frequency signal is regulated to a certain communication frequency band and a certain signal strength value, and there is no interference phenomenon in the functional module to be tested, then this communication frequency band is the target communication frequency band of the radio frequency signal for anti-interference of the functional module to be tested, and the signal strength value is the signal strength threshold of the radio frequency signal for anti-interference of the functional module to be tested, and the anti-interference test of different network systems, different communication frequency bands, and different transmission powers of different functional modules to be tested can be completed.

[0079] Step 105: Generate an anti-interference test result of the functional module to be tested according to the target test parameter group of the radio frequency signal for anti-interference of the functional module to be tested.

[0080] In an embodiment of the present invention, according to the target communication frequency band and signal strength threshold under different network systems of the radio frequency signal against which the functional module to be tested resists interference, an anti-interference test result of the functional module to be tested is generated. The anti-interference test result includes information such as the anti-interference ability ratings of different network systems, different communication frequency bands, and different transmission powers of different functional modules to be tested, as well as the signal strength threshold of the radio frequency signal. Among them, the anti-interference ability rating corresponds to the signal strength threshold of the radio frequency signal against which interference is resisted. For example, the larger the signal strength threshold of the radio frequency signal against which interference is resisted, the higher the anti-interference ability rating. This embodiment does not make specific limitations in this regard.

[0081] In this embodiment, the anti-interference test result of the functional module to be tested reflects the target communication frequency band and signal strength threshold that the functional module to be tested can withstand and resist electromagnetic interference. To avoid the electromagnetic interference generated by the increase in the transmission power of its own communication signal when the current vehicle is in a weak network or no-network environment, according to the anti-interference test result of the functional module to be tested, this embodiment controls the real-time radio frequency signal sent by the communication module within the target communication frequency band and signal strength threshold of the anti-interference test result, thereby avoiding problems such as screen flickering, audio stuttering, and background noise exhibited by in-vehicle entertainment devices due to electromagnetic interference.

[0082] The in-vehicle entertainment device testing method provided by the embodiments of the present invention is such that the testing device determines the network system to be tested of the communication module, as well as the communication frequency band and signal strength value corresponding to the network system to be tested, divides the network system to be tested, and the communication frequency band and signal strength value corresponding to the network system to be tested into multiple test parameter groups, controls the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmits them to multiple functional modules to be tested, monitors the radio frequency signals and the interference conditions of the functional modules to be tested in response to the radio frequency signals, and adjusts the current test parameter group of the radio frequency signals according to the interference conditions of the functional modules to be tested in response to the radio frequency signals until the target test parameter group of the radio frequency signals with anti-interference ability of the functional modules to be tested is determined. The target test parameter group includes the target communication frequency band and signal strength threshold under different network systems. According to the target test parameter group of the radio frequency signals with anti-interference ability of the functional modules to be tested, an anti-interference test result of the functional modules to be tested is generated. The embodiments of the present invention utilize the communication module in the in-vehicle entertainment device to controllably output radio frequency signals of various network systems, communication frequency bands, and signal strengths as interference signals for electromagnetic interference testing, transmit the interference signals to each functional module to be tested in the in-vehicle entertainment device through the testing device, can flexibly and fully simulate the actual communication interference conditions of the in-vehicle entertainment device, and by monitoring the electromagnetic interference conditions of each functional module to be tested under different interference signals, adjust the test parameters of the interference signals in real time, obtain the electromagnetic anti-interference test results of each functional module to be tested under interference signals of different network systems and different communication frequency bands, greatly improve the test accuracy of the in-vehicle entertainment device, and achieve a comprehensive and effective test of the electromagnetic anti-interference ability of each functional module in the in-vehicle entertainment device, further improving the reliability of the production and operation of the in-vehicle entertainment device products.

[0083] Further, referring to Figure 2 , Figure 2 is Figure 1 the flowchart of step 101 of the in-vehicle entertainment device testing method provided by the embodiments of the present invention in

[0084] Step 201, obtain the network system of the communication module of the in-vehicle entertainment device; wherein, the network system of the communication module includes at least one of multiple network systems;

[0085] Step 202, determine the network system to be tested of the communication module in the network system according to the test requirements of the functional module to be tested;

[0086] Step 203, determine the communication frequency band and signal strength value corresponding to the network system to be tested according to the pre-set correspondence between the network system and the communication frequency band and signal strength value.

[0087] It should be noted that in the embodiments of the present invention, the input end of the test device includes a comprehensive tester. Before performing the anti-interference test of the radio frequency signal, first disconnect the 2G / 3G / 4G / 5G communication antennas connected to the internal communication module of the in-vehicle entertainment device, and connect the comprehensive tester to the communication module of the in-vehicle entertainment device through a radio frequency cable. Specifically, use the comprehensive tester to establish a connection with the communication module of the in-vehicle entertainment system. The comprehensive tester sends a detection signal to the communication module, and the communication module returns a list of network modes it supports (such as wireless, Bluetooth, or 2G / 3G / 4G / 5G). Among them, the network mode of the communication module includes at least one of multiple network modes. For a single test, in this embodiment, the comprehensive tester determines the network mode to be tested of the communication module according to the test requirements of the functional module to be tested.

[0088] Specifically, the test requirements include the network mode to be tested currently for the functional module to be tested, which can be input by the user to the comprehensive tester, or the comprehensive tester determines the network mode to be tested of the communication module in sequence according to the network modes supported by the communication module. The comprehensive tester determines the network mode to be tested of the communication module in response to the test requirements of the functional module to be tested, and determines the communication frequency band and signal strength value corresponding to the network mode to be tested according to the pre-set corresponding relationship between the network mode, the communication frequency band, and the signal strength value. The corresponding relationship between the network mode and the signal strength value is determined based on a large number of radio frequency signals. Taking a common in-vehicle entertainment device supporting mobile communication as an example, the network modes of the in-vehicle entertainment device are 2G, 4G, and 5G. Among them, the typical communication frequency bands of 2G are 889 MHz - 904 MHz, 1710 MHz - 1735 MHz, etc.; the typical communication frequency bands of 4G are 1805 MHz - 1830 MHz, 2320 MHz - 2370 MHz, etc.; the typical communication frequency bands of 5G are 2515 MHz - 2675 MHz, 4800 MHz - 4900 MHz. The transmit power of the 2G mode ≤ 33 dBm, the transmit power of the 4G mode ≤ 23 dBm, and the transmit power of the 5G mode ≤ 23 dBm.

[0089] In the embodiments of the present invention, according to the test requirements of the functional module to be tested, the network mode to be tested of the communication module and the communication frequency band and signal strength value corresponding to the network mode to be tested are determined, so as to meet the anti-interference test of the radio frequency signal with any network mode, any communication frequency band, and different transmit power outputs for the functional module to be tested.

[0090] Further, referring to Figure 3 , Figure 3 is Figure 1 The method flow chart of step 102 of the in-vehicle entertainment device test method provided in the embodiments of the present invention. This method is basically the same as the in-vehicle entertainment device test method provided in the first embodiment of the present invention. The input end of the test device includes a comprehensive tester. Step 102 may specifically include the following steps:

[0091] Step 301: Divide the network mode to be measured, the corresponding communication frequency band and signal strength value of the network mode to be measured into multiple test parameter groups, and generate a signal control signaling according to the test parameter groups.

[0092] Step 302: Send the signal control signaling to the communication module through a comprehensive tester, control the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmit them to multiple functional modules to be measured.

[0093] It should be noted that in the embodiment of the present invention, the network mode to be measured, the corresponding communication frequency band and signal strength value of the network mode to be measured are divided into multiple test parameter groups. Each test parameter group includes a section of communication frequency band and signal strength value under one network mode, so as to control the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups and transmit them to multiple functional modules to be measured. After the comprehensive tester in the test equipment determines the network mode to be measured (such as 4G), the corresponding communication frequency band (1805 MHz - 1830 MHz) and signal strength value (such as 23 dBm) in the test parameter group, it controls the communication module to output the radio frequency signals of the network mode to be measured and the corresponding communication frequency band and signal strength value. The comprehensive tester generates a signal control signaling according to the network mode to be measured of the communication module and the corresponding communication frequency band and signal strength value, and sends the signal control signaling to the communication module through the comprehensive tester to control the communication module to output the radio frequency signals of the network mode to be measured and the corresponding communication frequency band and signal strength value.

[0094] Specifically, the comprehensive tester generates a standardized signal control signaling according to the determined network mode to be measured (such as 4G), communication frequency band (1805 MHz - 1830 MHz) and signal strength value (such as 23 dBm), and sends the signal control signaling to the communication module. The signal control instruction includes the network mode to be measured and the corresponding communication frequency band and signal strength value of the network mode to be measured. In response to the signal control signaling, the communication module parses out the network mode to be measured and the corresponding communication frequency band and signal strength value included in the signal control instruction, and switches to the network mode to be measured, and outputs the radio frequency signals of the corresponding communication frequency band and signal strength value of the network mode to be measured.

[0095] The embodiment of the present invention uses a comprehensive tester to control the radio frequency signals required for testing, and can control the communication module to flexibly operate in any network mode, any communication frequency band and different transmission powers to output the radio frequency signals required for testing, meeting the anti-interference test requirements of the functional modules to be measured.

[0096] In an embodiment of the present invention, after step 302: sending the signal control signaling to the communication module through the comprehensive tester, controlling the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple functional modules to be measured, the following may further be included:

[0097] The radio frequency signal output by the communication module is verified by a comprehensive tester to determine whether the radio frequency signal meets the signal parameters in the test parameter group.

[0098] If not, a signal regulation instruction is generated, and according to the signal regulation instruction, the parameters of the radio frequency signal of the communication module are regulated to the signal parameters in the test parameter group.

[0099] It should be noted that in the above steps, after the communication module outputs a radio frequency signal with the signal parameters in the test parameter group, that is, the radio frequency signal of the to-be-tested network mode and the corresponding communication frequency band and signal strength value of the to-be-tested network mode, the comprehensive tester continuously monitors the radio frequency signal output by the communication module. The radio frequency signal output by the communication module is verified by the comprehensive tester to check whether the actually output radio frequency signal of the communication module meets the error range. Specifically, it is determined whether the radio frequency signal meets the to-be-tested network mode and the corresponding communication frequency band and signal strength value of the to-be-tested network mode. If the output situation of the radio frequency signal is inconsistent with the to-be-tested network mode and the corresponding signal strength value of the to-be-tested network mode, the comprehensive tester generates a signal regulation instruction, sends the signal regulation instruction to the network communication module, and regulates the radio frequency signal of the communication module to the to-be-tested network mode and the corresponding communication frequency band and signal strength value of the to-be-tested network mode according to the signal regulation instruction.

[0100] In the embodiment of the present invention, the comprehensive tester is used to continuously monitor the radio frequency signal output by the communication module, and in real time, the radio frequency signal output by the communication module is regulated to be consistent with the to-be-tested network mode required for testing and the corresponding communication frequency band and signal strength value of the to-be-tested network mode, ensuring the accuracy of the radio frequency signal output by the communication module and further improving the accuracy of the anti-interference test result of the to-be-tested functional module.

[0101] Further, referring to Figure 4 , Figure 4 is Figure 1 The method flow chart of step 103 of the vehicle-mounted entertainment device test method provided in the embodiment of the present invention. This method is basically the same as the vehicle-mounted entertainment device test method provided in the first embodiment of the present invention. The test device includes a spectrum analyzer, and step 103 may specifically include the following steps:

[0102] Step 401, perform spectrum monitoring on the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal and the communication frequency band and signal strength value during the transmission of the radio frequency signal;

[0103] Step 402, when it is monitored that the radio frequency signal is transmitted to the to-be-tested functional module, monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal.

[0104] It should be noted that in the embodiments of the present invention, the test device includes a first coupling capacitor, a second coupling capacitor, and a spectrum analyzer. The input end of the test device includes a comprehensive tester and a radio frequency step attenuator. The radio frequency step attenuator is connected in series with the first coupling capacitor and the second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device, and the functional module to be tested is connected to the output end of the test device. After the communication module emits a radio frequency signal, the radio frequency signal is sequentially transmitted to the functional module to be tested through the radio frequency step attenuator, the first coupling capacitor, and the second coupling capacitor. The spectrum analyzer in the test device is used to monitor the spectrum of the radio frequency signal to determine the transmission state of the radio frequency signal, as well as the communication frequency band and signal strength value during the transmission of the radio frequency signal, and to monitor the transmission of the radio frequency signal in real time to ensure that the radio frequency signal is stably transmitted to the functional module to be tested.

[0105] Specifically, when it is monitored by the spectrum analyzer that the radio frequency signal is transmitted to the functional module to be tested, it indicates that the radio frequency signal emitted by the communication module successfully reaches the functional module to be tested and generates electromagnetic interference on the functional module to be tested as an interference signal. Therefore, in order to test the anti-interference ability of the functional module to be tested against this radio frequency signal, the test device in this embodiment also needs to monitor the interference situation of the functional module to be tested in response to the radio frequency signal. The spectrum analyzer in the test device can be used to monitor the interference situation of the functional module to be tested in response to the radio frequency signal. In some embodiments, the interference situation of the functional module to be tested in response to the radio frequency signal can be monitored by using other audio and video signal monitors or by manual observation by testers, which will not be elaborated here one by one.

[0106] The embodiments of the present invention monitor the transmission state of the radio frequency signal and the interference situation of the functional module to be tested in response to the radio frequency signal, so as to monitor the interference situation of the functional module to be tested in real time, and thus timely adjust the radio frequency signal according to the interference situation of the functional module for anti-interference ability testing.

[0107] In an embodiment of the present invention, the test device further includes a first coupling capacitor and a second coupling capacitor, and the spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. Before step 401 monitors the spectrum of the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal and the signal strength value during the transmission of the radio frequency signal, it may further include:

[0108] Pre-adjust the monitoring frequency band range of the spectrum analyzer, and the capacitance values of the first coupling capacitor and the second coupling capacitor;

[0109] Pass the radio frequency signal through the first coupling capacitor and the second coupling capacitor to control the communication frequency band of the radio frequency signal within the monitoring frequency band range of the spectrum analyzer.

[0110] In this embodiment, the RF step attenuator is connected in series with the first coupling capacitor and the second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device. The test device is connected to the functional module under test through the output end of the second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. It should be noted that the first coupling capacitor and the second coupling capacitor are connected in series to isolate the DC component and only allow RF signals to pass through. The first coupling capacitor, the second coupling capacitor and the spectrum analyzer cooperate to form a high-pass filter to ensure the purity of the signals within the monitored frequency band.

[0111] Specifically, to ensure real-time monitoring of RF signals and the purity of the signals within the monitored frequency band, in this embodiment, the monitored frequency band range of the spectrum analyzer and the capacitance values of the first coupling capacitor and the second coupling capacitor are pre-adjusted. For example, when the RF signal is of the 2G network mode, the communication frequency band is 889 MHz - 904 MHz, and the signal strength is 33 dBm, the monitored frequency band range of the spectrum analyzer is pre-adjusted to 850 MHz - 950 MHz to completely cover the communication frequency band of the 2G network mode. At the same time, the Maxhold and Mark functions of the spectrum analyzer can be turned on, the measurement unit is selected as dBm, and the strength and spectrum of the 2G RF signal output from the first coupling capacitor are monitored. The coaxial cable length between the first coupling capacitor, the second coupling capacitor and the RF signal injection port is not greater than 50 mm to reduce signal attenuation. The capacitance value range of the first coupling capacitor and the second coupling capacitor can be 1 - 4.7 nF to filter out the noise in non-mobile communication frequency bands.

[0112] In the embodiment of the present invention, by adjusting the monitored frequency band range of the spectrum analyzer to completely cover the communication frequency band of the RF signal, the RF signal is monitored in real time. A high-pass filter is formed by using the first coupling capacitor, the second coupling capacitor and the spectrum analyzer to filter out the noise in non-mobile communication frequency bands, only allowing RF signals to pass through, reducing the transmission loss of RF signals, and ensuring the effectiveness of the RF signals for testing the functional module under test.

[0113] Further, referring to Figure 5 , Figure 5 is Figure 1 the flowchart of step 104 of the method for testing in-vehicle entertainment devices provided in the embodiment of the present invention. This method is basically the same as the method for testing in-vehicle entertainment devices provided in the first embodiment of the present invention. The input end of the test device further includes an RF step attenuator. Step 104 can specifically include the following steps:

[0114] Step 501, determine whether to adjust the current test parameter set of the RF signal according to the interference situation of the functional module under test in response to the RF signal;

[0115] Step 502, when it is determined to perform regulation on the test parameter group for the radio frequency signal, update the communication frequency band in the current test parameter group, and use a radio frequency step attenuator to attenuate the signal strength value of the radio frequency signal according to a preset attenuation level.

[0116] Step 503, monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal after signal strength attenuation until the target communication frequency band and signal strength threshold of the radio frequency signal against which the to-be-tested functional module is anti-interference are determined.

[0117] In the embodiment of the present invention, according to the interference situation of the to-be-tested functional module in response to the radio frequency signal, it is determined whether to perform regulation on the current test parameter group of the radio frequency signal, that is, to determine whether to update the communication frequency band in the current test parameter group and whether to perform signal strength attenuation on the radio frequency signal. If there is interference in the interference situation of the to-be-tested functional module in response to the radio frequency signal, update the communication frequency band in the current test parameter group, determine to perform signal strength attenuation regulation on the radio frequency signal, use a radio frequency step attenuator to attenuate the signal strength value of the radio frequency signal according to a preset attenuation level, and at the same time, monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal after signal strength attenuation until the target communication frequency band and signal strength threshold of the radio frequency signal against which the to-be-tested functional module is anti-interference are determined.

[0118] Specifically, use a radio frequency step attenuator to attenuate the signal strength value of the radio frequency signal according to a preset attenuation level. For example, attenuate the signal strength by 1 dB each time and observe whether there is an electromagnetic interference phenomenon in the to-be-tested functional module. Until when the radio frequency signal is regulated and attenuated to a certain signal strength value and there is no electromagnetic interference phenomenon in the to-be-tested functional module, this signal strength value is the signal strength threshold of the radio frequency signal against which the to-be-tested functional module is anti-interference, so as to obtain the signal strength thresholds of the radio frequency signals with different network systems and different communication frequency bands against which the to-be-tested functional module is anti-interference.

[0119] The embodiment of the present invention injects other functional modules inside the in-vehicle entertainment device through the coupling circuit of the test equipment, regulates the radio frequency signal in real time, and obtains the electromagnetic anti-interference test results of each functional module for radio frequency signals with different network systems and different communication frequency bands, so as to realize flexible and effective testing of the electromagnetic anti-interference capabilities of functional modules such as audio and video display in the in-vehicle entertainment device.

[0120] In an embodiment of the present invention, the communication module of the in-vehicle entertainment device includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module, and the to-be-tested functional module of the in-vehicle entertainment device includes at least one of a power amplifier module, a radio receiving module, and a panoramic module.

[0121] It should be noted that the communication module of the in-vehicle entertainment device includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module. The to-be-tested function module of the in-vehicle entertainment device includes at least one of a power amplifier module, a radio module, and a panoramic module. For the anti-interference test of the power amplifier module, it is used to test the fidelity and stability of audio output under radio frequency signal interference. For the anti-interference test of the radio module, it is used to ensure the reception sensitivity and anti-interference ability of FM / AM radio under cellular network interference. For the anti-interference test of the panoramic module, it is used to test the stability of video images played in a complex radio frequency environment.

[0122] In the above embodiment, after step 105 generates the anti-interference test result of the to-be-tested function module according to the target test parameter group of the radio frequency signal for anti-interference of the to-be-tested function module, it may further include:

[0123] Upload the anti-interference test result of the to-be-tested function module to the host computer, and control the actual radio frequency signal of the communication module according to the anti-interference test result.

[0124] In the embodiment of the present invention, the anti-interference test result includes information such as the anti-interference ability ratings of different network systems, different communication frequency bands, and different transmission powers of different to-be-tested function modules, as well as the signal strength threshold of the radio frequency signal. To identify the internal electromagnetic risks of the product in advance and optimize the product design, this embodiment can upload the anti-interference test result of the to-be-tested function module to the host computer, and control the actual radio frequency signal of the communication module according to the anti-interference test result, and control the real-time radio frequency signal sent by the communication module within the target communication frequency band and signal strength threshold of the anti-interference test result, so as to avoid problems such as screen flickering, audio stuttering, and noise caused by electromagnetic interference in the in-vehicle entertainment device, and further ensure the product quality.

[0125] Refer to Figure 6 , which shows a schematic structural diagram of a test device for an in-vehicle entertainment device provided by an embodiment of the present invention. Applied to the test device side, the test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The device may include:

[0126] A determining test parameter module 601, configured to determine the to-be-tested network system of the communication module, and the communication frequency band and signal strength value corresponding to the to-be-tested network system;

[0127] The control output module 602 is configured to divide the network mode to be measured, the corresponding communication frequency band and signal strength value of the network mode to be measured into multiple test parameter groups, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple function modules to be measured;

[0128] The monitoring interference module 603 is configured to monitor the radio frequency signals and the interference conditions of the function modules to be measured in response to the radio frequency signals;

[0129] The signal regulation module 604 is configured to regulate the current test parameter group of the radio frequency signal according to the interference conditions of the function modules to be measured in response to the radio frequency signal until the target test parameter group of the radio frequency signal for which the function modules to be measured have anti-interference ability is determined; wherein, the target test parameter group includes the target communication frequency band and signal strength threshold under different network modes;

[0130] The test result generation module 605 is configured to generate an anti-interference test result of the function modules to be measured according to the target test parameter group of the radio frequency signal for which the function modules to be measured have anti-interference ability.

[0131] Further, the test parameter determination module 601 includes:

[0132] An acquisition sub-module, configured to acquire the network mode of the communication module of the in-vehicle entertainment device; wherein, the network mode of the communication module includes at least one of multiple network modes;

[0133] A first determination sub-module, configured to determine the network mode to be measured of the communication module according to the test requirements of the function modules to be measured among the network modes;

[0134] A second determination sub-module, configured to determine the signal strength value corresponding to the network mode to be measured according to the pre-set corresponding relationship between the network mode and the communication frequency band and signal strength value.

[0135] Further, the input end of the test device includes a comprehensive tester, and the control output module 602 includes:

[0136] A first generation sub-module, configured to divide the network mode to be measured, the corresponding communication frequency band and signal strength value of the network mode to be measured into multiple test parameter groups, and generate a signal control signaling according to the test parameter groups;

[0137] A first control sub-module, configured to send the signal control signaling to the communication module through the comprehensive tester, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple function modules to be measured.

[0138] Further, the control output module 602 further includes:

[0139] The syndrome sub-module is used to verify the radio frequency signal output by the communication module through the comprehensive tester, and determine whether the radio frequency signal meets the signal parameters in the test parameter group;

[0140] The second generation sub-module is used to, if not, generate a signal regulation instruction, and regulate the parameters of the radio frequency signal of the communication module to the signal parameters in the test parameter group according to the signal regulation instruction.

[0141] Further, the test equipment includes a spectrum analyzer, and the monitoring interference module 603 includes:

[0142] The first monitoring sub-module is used to perform spectrum monitoring on the radio frequency signal through the spectrum analyzer, and determine the transmission state of the radio frequency signal, as well as the communication frequency band and signal strength value during the transmission of the radio frequency signal;

[0143] The second monitoring sub-module is used to monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal when it is monitored that the radio frequency signal is transmitted to the to-be-tested functional module.

[0144] Further, the test equipment further includes a first coupling capacitor and a second coupling capacitor, the spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor, and the monitoring interference module 603 further includes:

[0145] The pre-regulation sub-module is used to pre-regulate the monitoring frequency band range of the spectrum analyzer, as well as the capacitance values of the first coupling capacitor and the second coupling capacitor;

[0146] The second control sub-module is used to pass the radio frequency signal through the first coupling capacitor and the second coupling capacitor, and control the communication frequency band of the radio frequency signal within the monitoring frequency band range of the spectrum analyzer.

[0147] Further, the input end of the test equipment further includes a radio frequency step attenuator, and the signal regulation module 604 includes:

[0148] The third determination sub-module is used to determine whether to regulate the current test parameter group of the radio frequency signal according to the interference situation of the to-be-tested functional module in response to the radio frequency signal;

[0149] The regulation sub-module is used to update the communication frequency band in the current test parameter group when it is determined to perform test parameter group regulation on the radio frequency signal, and use the radio frequency step attenuator to perform signal strength attenuation on the signal strength value of the radio frequency signal according to a preset attenuation level;

[0150] The third monitoring sub-module is used to monitor the interference situation of the radio frequency signal after the signal strength attenuation in the to-be-tested functional module until the target communication frequency band and signal strength threshold of the radio frequency signal against which the to-be-tested functional module has anti-interference ability are determined.

[0151] Further, the communication module of the in-vehicle entertainment device includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module, and the to-be-tested functional module of the in-vehicle entertainment device includes at least one of a power amplifier module, a radio module, and a panoramic module.

[0152] Further, the device further includes:

[0153] A test result uploading module, which is used to upload the anti-interference test result of the to-be-tested functional module to the host computer and control the actual radio frequency signal of the communication module according to the anti-interference test result.

[0154] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the related parts, please refer to the partial description of the method embodiment.

[0155] The in-vehicle entertainment device test device provided by the embodiment of the present invention determines the to-be-tested network system of the communication module and the corresponding communication frequency band and signal strength value of the to-be-tested network system, divides the to-be-tested network system and the corresponding communication frequency band and signal strength value into multiple test parameter groups, controls the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmits them to multiple to-be-tested functional modules, monitors the radio frequency signals and the interference situation of the to-be-tested functional modules in response to the radio frequency signals, adjusts the current test parameter group of the radio frequency signals according to the interference situation of the to-be-tested functional modules in response to the radio frequency signals until the target test parameter group of the radio frequency signal against which the to-be-tested functional module has anti-interference ability is determined. The target test parameter group includes the target communication frequency band and signal strength threshold under different network systems. According to the target test parameter group of the radio frequency signal against which the to-be-tested functional module has anti-interference ability, an anti-interference test result of the to-be-tested functional module is generated. The embodiment of the present invention uses the communication module in the in-vehicle entertainment device to controllably output radio frequency signals of various network systems, communication frequency bands, and signal strengths as interference signals for electromagnetic interference testing, transmits the interference signals to each to-be-tested functional module in the in-vehicle entertainment device through the test device, can flexibly and fully simulate the actual communication interference situation of the in-vehicle entertainment device, and by monitoring the electromagnetic interference situation of each to-be-tested functional module under different interference signals, adjusts the test parameters of the interference signals in real time to obtain the electromagnetic anti-interference test results of each to-be-tested functional module under the interference signals of different network systems and different communication frequency bands, greatly improving the test accuracy of the in-vehicle entertainment device, realizing a comprehensive and effective test of the electromagnetic anti-interference ability of each functional module in the in-vehicle entertainment device, and further improving the reliability of the production and operation of the in-vehicle entertainment device products.

[0156] Referring to Figure 8 , a schematic structural diagram of a vehicle-mounted entertainment device test system provided by an embodiment of the present invention is shown. The system includes a vehicle-mounted entertainment device and a test device. The vehicle-mounted entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device, including:

[0157] The comprehensive tester determines the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, divides the to-be-tested network mode, the communication frequency band corresponding to the to-be-tested network mode, and the signal strength value into multiple test parameter groups, controls the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmits them to multiple to-be-tested function modules;

[0158] The spectrum analyzer monitors the radio frequency signals and the interference conditions of the to-be-tested function modules in response to the radio frequency signals;

[0159] The radio frequency step attenuator adjusts the current test parameter group of the radio frequency signal according to the interference conditions of the to-be-tested function modules in response to the radio frequency signals until the target test parameter group of the radio frequency signal for which the to-be-tested function modules are anti-interference is determined; wherein, the target test parameter group includes the target communication frequency band and signal strength threshold under different network modes;

[0160] The test device is used to generate an anti-interference test result of the to-be-tested function module according to the target test parameter group of the radio frequency signal for which the to-be-tested function module is anti-interference.

[0161] For the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For related parts, refer to the partial description of the method embodiment.

[0162] The present invention also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the vehicle-mounted entertainment device test method described in the first aspect of the embodiment of the present invention are implemented.

[0163] The algorithms and displays provided herein are not inherently related to any particular computer, virtual device, or other equipment. Based on the above description, the structures required to construct such devices are obvious. In addition, the present invention is not directed to any particular programming language. It should be understood that the content of the present invention described herein can be implemented using various programming languages, and the description of the specific language above is to disclose the best implementation manner of the present invention.

[0164] In the description provided herein, numerous specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

[0165] Similarly, it should be understood that in order to streamline the present invention and assist in understanding one or more of the various inventive aspects, in the foregoing description of the exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0166] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and disposed in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all the features disclosed in this specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0167] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the sorting device according to the present invention. The present invention can also be implemented as a device or apparatus program for performing part or all of the methods described herein. Such a program for implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or in any other form.

[0168] It should be noted that the above embodiments are illustrative of the present invention rather than restrictive of the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0169] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working processes of the above-described devices, apparatuses, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0170] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0171] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention and shall be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

[0172] It should be noted that in the embodiments of the present application, the processes of obtaining various data are all carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and with the authorization given by the owner of the corresponding device.

Claims

1. A method for testing an in-vehicle entertainment device, characterized in that, Applied to the test device side, the test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The method includes: Determine the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode; Divide the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, control the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested function modules; Monitor the radio frequency signals and the interference conditions of the to-be-tested function modules in response to the radio frequency signals; According to the interference conditions of the to-be-tested function modules in response to the radio frequency signals, adjust the current test parameter group of the radio frequency signals until the target test parameter group of the radio frequency signals that the to-be-tested function modules are resistant to interference is determined; wherein, the target test parameter group includes the target communication frequency band and signal strength threshold under different network modes; Generate the anti-interference test result of the to-be-tested function module according to the target test parameter group of the radio frequency signals that the to-be-tested function module is resistant to interference.

2. The method according to claim 1, wherein The determining the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, includes: Obtain the network mode of the communication module of the in-vehicle entertainment device; wherein, the network mode of the communication module includes at least one of multiple network modes; Determine the to-be-tested network mode of the communication module in the network modes according to the test requirements of the to-be-tested function module; Determine the communication frequency band and signal strength value corresponding to the to-be-tested network mode according to the pre-set corresponding relationship between the network mode and the communication frequency band and signal strength value.

3. The method according to claim 1, characterized in that The input end of the test device includes a comprehensive tester. The dividing the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, controlling the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple to-be-tested function modules includes: Divide the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, and generate a signal control signaling according to the test parameter groups; Send the signal control signaling to the communication module through the comprehensive tester, control the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested function modules.

4. The method according to claim 3, characterized in that, After the sending the signal control signaling to the communication module through the comprehensive tester, controlling the communication module to sequentially output the radio frequency signals corresponding to the test parameter groups, and transmitting them to multiple to-be-tested function modules, it further includes: Verify the radio frequency signals output by the communication module through the comprehensive tester, and judge whether the radio frequency signals meet the signal parameters in the test parameter groups; If not, generate a signal regulation instruction, and regulate the parameters of the radio frequency signal of the communication module to the signal parameters in the test parameter group according to the signal regulation instruction.

5. The method according to claim 1, wherein The test device includes a spectrum analyzer. The monitoring of the radio frequency signal and the interference situation of the to-be-tested functional module in response to the radio frequency signal includes: Perform spectrum monitoring on the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal, as well as the communication frequency band and signal strength value during the transmission of the radio frequency signal; When it is monitored that the radio frequency signal is transmitted to the to-be-tested functional module, monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal.

6. The method according to claim 5, wherein The test device further includes a first coupling capacitor and a second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. Before performing spectrum monitoring on the radio frequency signal through the spectrum analyzer to determine the transmission state of the radio frequency signal, as well as the communication frequency band and signal strength value during the transmission of the radio frequency signal, it further includes: Pre-regulate the monitoring frequency band range of the spectrum analyzer, and the capacitance values of the first coupling capacitor and the second coupling capacitor; Pass the radio frequency signal through the first coupling capacitor and the second coupling capacitor to control the communication frequency band of the radio frequency signal within the monitoring frequency band range of the spectrum analyzer.

7. The method according to claim 1, characterized in that, The input end of the test device further includes a radio frequency step attenuator. The regulation of the current test parameter group of the radio frequency signal according to the interference situation of the to-be-tested functional module in response to the radio frequency signal until the target test parameter group of the radio frequency signal for which the to-be-tested functional module resists interference is determined includes: Determine whether to regulate the current test parameter group of the radio frequency signal according to the interference situation of the to-be-tested functional module in response to the radio frequency signal; When it is determined to perform test parameter group regulation on the radio frequency signal, update the communication frequency band in the current test parameter group, and use the radio frequency step attenuator to perform signal strength attenuation on the signal strength value of the radio frequency signal according to a preset attenuation level; Monitor the interference situation of the to-be-tested functional module in response to the radio frequency signal after signal strength attenuation until the target communication frequency band and signal strength threshold of the radio frequency signal for which the to-be-tested functional module resists interference are determined.

8. The method according to any one of claims 1 to 7, characterized in that, The communication module of the in-vehicle entertainment device includes at least one of a network communication module, a wireless communication module, and a Bluetooth communication module. The to-be-tested functional module of the in-vehicle entertainment device includes at least one of a power amplifier module, a radio receiving module, and a panoramic module.

9. The method according to claim 1, wherein After generating the anti-interference test result of the to-be-tested functional module according to the target test parameter group of the radio frequency signal for which the to-be-tested functional module resists interference, it further includes: Upload the anti-interference test result of the to-be-tested functional module to the host computer, and control the actual radio frequency signal of the communication module according to the anti-interference test result.

10. A vehicle-mounted entertainment device testing apparatus, characterized in that, Applied to the test device side, the test device is connected to the in-vehicle entertainment device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. The device includes: A test parameter determination module, configured to determine the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode; A control output module, configured to divide the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, control the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmit them to multiple to-be-tested function modules; An interference monitoring module, configured to monitor the radio frequency signals and the interference conditions of the to-be-tested function modules in response to the radio frequency signals; A signal regulation module, configured to regulate the current test parameter group of the radio frequency signals according to the interference conditions of the to-be-tested function modules in response to the radio frequency signals, until a target test parameter group of the radio frequency signals that the to-be-tested function modules are resistant to interference is determined; wherein, the target test parameter group includes target communication frequency bands and signal strength thresholds under different network modes; A test result generation module, configured to generate an anti-interference test result of the to-be-tested function module according to the target test parameter group of the radio frequency signals that the to-be-tested function module is resistant to interference.

11. A vehicle-mounted entertainment device testing system, characterized in that, The system includes an in-vehicle entertainment device and a test device. The in-vehicle entertainment device includes a communication module and a to-be-tested function module. The communication module is connected to the input end of the test device, and the to-be-tested function module is connected to the output end of the test device. It includes: The test device includes a comprehensive tester, a radio frequency step attenuator, a first coupling capacitor, a second coupling capacitor, and a spectrum analyzer. The input end of the test device includes the comprehensive tester and the radio frequency step attenuator. The radio frequency step attenuator is connected in series with the first coupling capacitor and the second coupling capacitor. The spectrum analyzer is connected in parallel between the first coupling capacitor and the second coupling capacitor. The output end of the second coupling capacitor is the output end of the test device; The comprehensive tester determines the to-be-tested network mode of the communication module, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, divides the to-be-tested network mode, as well as the communication frequency band and signal strength value corresponding to the to-be-tested network mode, into multiple test parameter groups, controls the communication module to sequentially output radio frequency signals corresponding to the test parameter groups, and transmits them to multiple to-be-tested function modules; The spectrum analyzer monitors the radio frequency signals and the interference conditions of the to-be-tested function modules in response to the radio frequency signals; The radio frequency step attenuator regulates the current test parameter group of the radio frequency signals according to the interference conditions of the to-be-tested function modules in response to the radio frequency signals, until a target test parameter group of the radio frequency signals that the to-be-tested function modules are resistant to interference is determined; wherein, the target test parameter group includes target communication frequency bands and signal strength thresholds under different network modes; The test device is configured to generate an anti-interference test result of the functional module under test according to a target test parameter set of radio frequency signals against which the functional module under test is anti-interference.

12. A computer-readable storage medium, characterized in that, A computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the method for testing an in-vehicle entertainment device according to any one of claims 1 to 9 is implemented.

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