On-board wireless communication equipment OTA performance test method based on rack

Abstract

The invention discloses a rack-based vehicle-mounted wireless communication equipment OTA performance test method, which mainly comprises the steps that a rack test system is built in advance, and the system is composed of a multi-dimensional adjustable test support, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module and a control terminal; after the system is calibrated, configuring to-be-tested equipment and setting test parameters; the control terminal starts a test process: sending a control instruction to the multi-dimensional adjustable test support and the dynamic interference simulation unit to drive the to-be-tested device to move and simulate an electromagnetic interference environment; in the testing process, the high-precision signal acquisition module acquires radiation performance indexes in real time; and finally, the data processing module analyzes the received radiation performance indexes so as to evaluate the OTA performance of the to-be-tested equipment, and a final test report is generated according to the OTA performance of the to-be-tested equipment. According to the invention, a dynamic effect fitting a real scene and a complex interference environment are simulated, and the accuracy of a test result is effectively ensured while the test automation level is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile function test, and particularly relates to a vehicle-mounted wireless communication equipment OTA performance test method based on a test bench. BACKGROUND

[0002] With the rapid development of wireless communication technology, various types of wireless communication equipment are increasingly widely used, and users have higher and higher requirements for the wireless communication performance of the equipment. As a key means for evaluating the radiation performance of wireless communication equipment, OTA testing can directly reflect the communication quality of the equipment in actual use scenarios, and thus is of great significance in the research and development, production and certification of the equipment.

[0003] At present, most of the existing OTA test bench test methods adopt a fixed posture test method, that is, the equipment to be tested is fixed on a test bench, and the equipment remains stationary during the test, and only the position of the test antenna is adjusted to collect the radiation performance data of the equipment. This test method has obvious limitations: on the one hand, it cannot simulate the dynamic motion state of the equipment in actual use (such as user movement with the equipment, rotation of the equipment, etc.), resulting in a large deviation between the test results and the actual use scenario; on the other hand, the interference simulation capability of the existing test system is weak, and it can usually only simulate a single type of interference signal, making it difficult to reproduce complex actual electromagnetic environments and making it impossible to comprehensively evaluate the OTA performance of the equipment in the interference scenario.

[0004] In addition, the traditional OTA test process is relatively cumbersome, the setting of test parameters needs to be manually operated by a person, and the analysis of test data relies on the experience of professional personnel, which not only increases the work intensity of the test personnel, but also prolongs the test period and increases the test cost. Therefore, there is an urgent need for an OTA test bench test method that can simulate dynamic scenarios and complex interference environments, has high automation and strong test accuracy, in order to solve the problems existing in the prior art. SUMMARY

[0005] In view of the above, the present application aims to provide an OTA performance test method for vehicle-mounted wireless communication equipment based on a test bench, to solve the aforementioned technical problems.

[0006] The technical solution adopted by the present application is as follows:

[0007] The present application provides an OTA performance test method for vehicle-mounted wireless communication equipment based on a test bench, which comprises:

[0008] An OTA test bench test system is pre-built, wherein the test system specifically comprises: a multi-dimensional adjustable test support, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module and a control terminal;

[0009] The test system is initialized and calibrated;

[0010] After calibration, the device to be tested is configured and test parameters are set by the control terminal;

[0011] Based on the test parameters, the control terminal initiates a test process, including: according to the set test parameters, sending control instructions to the multi-dimensional adjustable test support and the dynamic interference simulation unit; the multi-dimensional adjustable test support moves the device to be tested according to the set dynamic motion trajectory; and the dynamic interference simulation unit outputs interference signals according to the set interference parameters to simulate an electromagnetic interference environment;

[0012] During the test process, the high-precision signal acquisition module collects and transmits radiation performance data in real time;

[0013] The data processing module analyzes the received radiation performance data to evaluate the OTA performance, and generates a final test report according to the evaluation results.

[0014] In at least one possible implementation, the initialization and calibration of the test system includes: calibrating the sensitivity and linearity of the high-precision signal acquisition module, calibrating the motion accuracy of the multi-dimensional adjustable test support, and calibrating the signal output strength and frequency accuracy of the dynamic interference simulation unit.

[0015] In at least one possible implementation, calibrating the motion accuracy of the multi-dimensional adjustable test support specifically includes:

[0016] The motion accuracy of the X-axis, Y-axis, Z-axis and rotating mechanism of the multi-dimensional adjustable test support is detected using a posture calibration tool, and the driving parameters of the multi-dimensional adjustable test support are adjusted to make the positioning accuracy of each motion mechanism in the support meet the predetermined standard value.

[0017] In at least one possible implementation, calibrating the signal output strength and frequency accuracy of the dynamic interference simulation unit specifically includes: inputting a calibration signal to the dynamic interference simulation unit, and adjusting the output parameters of the dynamic interference simulation unit to make the interference signal strength and frequency output by the dynamic interference simulation unit consistent with the preset value.

[0018] In at least one possible implementation, the test parameters at least include: dynamic motion trajectory parameters, interference signal type and strength parameters;

[0019] The dynamic motion trajectory parameters include: motion speed, motion acceleration, motion dwell time and motion path, to simulate the motion state of the device to be tested in actual use;

[0020] The interference signal type and intensity parameters include: the interference signal type determined according to the actual electromagnetic environment, as well as the corresponding interference signal intensity and frequency values.

[0021] In at least one possible implementation, the test parameters further include network parameters: the communication frequency band and protocol type of the device under test.

[0022] In at least one possible implementation, the analysis of the received radiation performance data includes:

[0023] Time-domain analysis, frequency-domain analysis, and statistical analysis algorithms are used to filter and reduce noise in the radiation performance data.

[0024] The processed radiation performance data are statistically analyzed, the values ​​of each index parameter are calculated, and the performance changes of the device under test under different interference intensities and types are analyzed in conjunction with the interference parameters to evaluate the device's anti-interference capability.

[0025] The main design concept of this invention lies in pre-building an OTA bench test system, which includes: a multi-dimensional adjustable test stand, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module, and a control terminal. After initializing and calibrating the test system, the device under test (DUT) is configured and test parameters are set. Based on the test parameters, the control terminal initiates the test process: sending control commands to the multi-dimensional adjustable test stand and the dynamic interference simulation unit to move the DUT and simulate an electromagnetic interference environment. During the test, the high-precision signal acquisition module collects and transmits radiation performance indicators in real time. Finally, the data processing module analyzes the received radiation performance indicators to evaluate the performance of the DUT's OTA function and generates a final test report based on the evaluation results. This invention simulates dynamic effects and complex electromagnetic interference environments that closely resemble real-world application scenarios, improving test automation while ensuring the accuracy of test results.

[0026] Specifically, compared with the prior art, the present invention has the following beneficial effects:

[0027] ① It can simulate dynamic scenarios and complex interference environments: The multi-dimensional adjustable test bracket drives the device under test to complete multi-posture movements. Combined with the output of various types of interference signals by the dynamic interference simulation unit, it can reproduce the dynamic state and complex electromagnetic environment of the device in actual use, and improve the accuracy and comprehensiveness of the test results.

[0028] ② High degree of automation: The entire testing process is automated through the control terminal. The setting of test parameters, data collection and analysis can be done without manual operation, which reduces the workload of testers and shortens the testing cycle.

[0029] ③ High test accuracy: Through comprehensive initialization and calibration of the test system, the motion accuracy of the multi-dimensional adjustable test bracket, the acquisition accuracy of the high-precision signal acquisition module, and the interference simulation accuracy of the dynamic interference simulation unit all meet the test requirements, thus ensuring the reliability of the test results. Attached Figure Description

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of an OTA performance testing method for vehicle-mounted wireless communication devices based on a bench, provided in an embodiment of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] This invention proposes an embodiment of an OTA performance testing method for vehicle-mounted wireless communication devices based on a test bench. Specifically, as follows: Figure 1 As shown, it includes:

[0034] Step S1: Set up the OTA bench test system;

[0035] The testing system specifically includes: a multi-dimensional adjustable test bracket, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module, and a control terminal. The multi-dimensional adjustable test bracket is used to move the device under test in multiple postures to simulate the actual usage state of the device; the high-precision signal acquisition module is used to collect radiation performance data of the device under test; the dynamic interference simulation unit is used to simulate complex electromagnetic interference environments; the data processing module is used to analyze and evaluate the collected data; and the control terminal is used to control the operation and parameter settings of the entire testing process. The device under test may be, but is not limited to, IVI ECUs, T-Boxes, and other vehicle components associated with OTA (Over-The-Air) functionality.

[0036] Step S2: Initialize and calibrate the test system;

[0037] To ensure the accuracy of test results, the test system can be initialized and calibrated, including the following:

[0038] (1) The sensitivity and linearity of the high-precision signal acquisition module are calibrated by: inputting a signal of predetermined intensity and frequency to the high-precision signal acquisition module through a preset standard signal source, and adjusting the parameters of the high-precision signal acquisition module so that the actual acquired signal data is consistent with the output data of the standard signal source, thereby ensuring that the sensitivity and linearity of the high-precision signal acquisition module meet the test requirements.

[0039] (2) The motion accuracy of the multi-dimensional adjustable test bracket is calibrated. Specifically, the motion accuracy of the X-axis, Y-axis, Z-axis and rotation mechanism of the multi-dimensional adjustable test bracket is detected by using an attitude calibration tool (such as a laser positioning instrument), and the driving parameters of the multi-dimensional adjustable test bracket are adjusted to ensure that the positioning accuracy of each motion mechanism is not less than 0.1mm and the stability during the motion process meets the test requirements.

[0040] (3) The signal output strength and frequency accuracy of the dynamic interference simulation unit are calibrated. Specifically, the interference signal calibration module is used to input a calibration signal to the dynamic interference simulation unit and the output parameters of the dynamic interference simulation unit are adjusted so that the interference signal strength and frequency output by the dynamic interference simulation unit are consistent with the preset values, thereby ensuring the accuracy of the interference simulation.

[0041] Step S3: After calibration, configure the device under test and set the test parameters;

[0042] The wireless communication device under test is fixed on the multi-dimensional adjustable test bracket, ensuring that the antenna orientation of the device under test is consistent with the signal receiving direction of the test system. More preferably, in order to enhance the effect of subsequent interference signals, the multi-dimensional adjustable test bracket, high-precision signal acquisition module, dynamic interference simulation unit and device under test can be configured in an anechoic chamber.

[0043] Next, the test parameters are set via the control terminal, specifically including:

[0044] (1) Communication frequency band of the device under test: Select the corresponding test frequency band (such as 2.4GHz, 5GHz, Sub-6GHz, etc.) according to the actual communication requirements of the device under test.

[0045] (2) Protocol type: Set the corresponding protocol parameters according to the wireless communication protocol (such as Wi-Fi, Bluetooth, 5G NR, etc.) used by the device under test.

[0046] (3) Dynamic motion trajectory parameters, including: motion speed (e.g., 0.1m / s-1m / s), motion acceleration (e.g., 0.05m / s²-0.5m / s²), motion dwell time (e.g., 1s-5s) and motion path (which can be customized as linear motion, circular motion, random motion, etc.) to simulate the motion state of the device under test in actual use.

[0047] (4) Interference signal type and intensity parameters: Based on the actual electromagnetic environment, determine the type of interference signal (such as narrowband interference, broadband interference, pulse interference, etc.) and set the corresponding interference signal intensity (such as -120dBm~0dBm) and frequency.

[0048] Step S4: Based on the test parameters, the control terminal initiates the test process: According to the set test parameters, control commands are sent to the multi-dimensional adjustable test bracket and the dynamic interference simulation unit; the multi-dimensional adjustable test bracket moves the device under test according to the set dynamic motion trajectory; during the movement, the various motion mechanisms of the bracket work together to ensure that the device's motion state is consistent with the preset trajectory. Additionally, the dynamic interference simulation unit is controlled to output interference signals according to the set interference parameters. The interference signals are radiated to the vicinity of the device under test through an interference antenna in the anechoic chamber to simulate a complex electromagnetic interference environment.

[0049] Two points need further explanation here. First, the specific content of the test task can be designed according to the OTA scenario. For example, the test task can include, but is not limited to, three scenarios: "normal upgrade process", "network disconnection retry", and "cross-version compatibility". In particular, some abnormal events can be designed, such as the abnormal event of the CAN bus load suddenly increasing to 90% when the upgrade reaches 80%, to examine whether the ECU triggers the "pause upgrade - restore communication - continue flashing" process to determine whether the task passes the test. This does not limit the scope of this invention. Second, for the aforementioned interference signals, you can refer to the simulation of the volume signal of a car audio system and the cellular network signal in an urban elevated road scenario (e.g., simulating the rate fluctuation of 5G signals in the range of 5-100Mbps) using a bench engine.

[0050] Step S5: During the test, the high-precision signal acquisition module acquires and transmits radiation performance data in real time;

[0051] Specifically, the high-precision signal acquisition module can acquire radiation performance data of the device under test in real time through the test antenna. The acquired data can mainly include key indicators such as radiated power, receiving sensitivity, EVM, and throughput. Simultaneously, the acquisition module transmits the acquired data to the data processing module at a frequency of 100-1000 times per second to ensure the real-time performance and completeness of the data to be analyzed.

[0052] Step S6: The data processing module analyzes the radiation performance data to evaluate OTA performance and generates a final test report based on the evaluation results.

[0053] In more detail, after receiving the data transmitted by the high-precision signal acquisition module, the data processing module can use time-domain analysis algorithms, frequency-domain analysis algorithms, and statistical analysis algorithms to process the radiation performance data, including:

[0054] Filtering and noise reduction are used to remove noise interference from data and improve data accuracy.

[0055] Next, statistical analysis is performed on the processed data: the above-mentioned indicators such as radiated power and receiver sensitivity are statistically analyzed, and parameters such as average value, maximum value, minimum value and standard deviation are calculated.

[0056] In particular, the interference response is analyzed: by combining the interference parameters of the dynamic interference simulation unit, the performance changes of the device under test under different interference intensities and types are analyzed, and the anti-interference capability of the device is evaluated.

[0057] Based on the above analysis results, the data processing module determines whether the radiation performance of the device under test in the OTA task scenario meets the preset standards (such as industry standards, enterprise standards, etc.).

[0058] Finally, a test report is generated based on the evaluation results. In practice, if the OTA performance of the device under test meets the preset standards, the data processing module generates a qualified test report; if it does not meet the standards, the unqualified items are marked, and the corresponding data analysis results are output, including: the specific values ​​of the unqualified indicators, the change curves during the test process, and possible influencing factors, providing a reference for subsequent device optimization. Preferably, but not limited to, the test report can be exported in PDF or Excel format for easy viewing and archiving by testers.

[0059] In summary, the main design concept of this invention lies in pre-building an OTA bench test system, which includes: a multi-dimensional adjustable test stand, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module, and a control terminal. After initializing and calibrating the test system, the device under test (DUT) is configured and test parameters are set. Based on the test parameters, the control terminal initiates the test process: sending control commands to the multi-dimensional adjustable test stand and the dynamic interference simulation unit to move the DUT and simulate an electromagnetic interference environment. During the test, the high-precision signal acquisition module collects and transmits radiation performance indicators in real time. Finally, the data processing module analyzes the received radiation performance indicators to evaluate the performance of the DUT's OTA function and generates a final test report based on the evaluation results. This invention simulates dynamic effects and complex electromagnetic interference environments that closely resemble real-world application scenarios, improving test automation while ensuring the accuracy of test results.

[0060] In this invention, when directional terms are mentioned, they are relative concepts based on the embodiments. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0061] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A bench-based OTA performance testing method for vehicle-mounted wireless communication devices, characterized in that, The application relates to an OTA test system and a test method thereof. The OTA test system comprises a multi-dimensional adjustable test support, a high-precision signal acquisition module, a dynamic interference simulation unit, a data processing module and a control terminal. The OTA test system is initialized and calibrated. After calibration, a device to be tested is configured and test parameters are set by the control terminal. Based on the test parameters, the control terminal starts a test process, which comprises sending control instructions to the multi-dimensional adjustable test support and the dynamic interference simulation unit according to the set test parameters; the multi-dimensional adjustable test support drives the device to be tested to move according to the set dynamic motion track; and the dynamic interference simulation unit outputs interference signals according to the set interference parameters to simulate an electromagnetic interference environment. During the test process, the high-precision signal acquisition module collects and transmits radiation performance data in real time. The data processing module analyzes the received radiation performance data to evaluate the OTA performance and generates a final test report according to the evaluation results.

2. The rack-based over-the-air (OTA) performance testing method of claim 1, wherein, The calibration of the OTA test system comprises calibrating the sensitivity and linearity of the high-precision signal acquisition module, the motion accuracy of the multi-dimensional adjustable test support and the signal output intensity and frequency accuracy of the dynamic interference simulation unit.

3. The rack-based over-the-air (OTA) performance testing method for vehicle wireless communication devices of claim 2, wherein, The calibration of the motion accuracy of the multi-dimensional adjustable test support comprises detecting the motion accuracy of the X-axis, Y-axis, Z-axis and rotating mechanism of the multi-dimensional adjustable test support by using a posture calibration tool and adjusting the driving parameters of the multi-dimensional adjustable test support so that the positioning accuracy of each motion mechanism in the support meets the predetermined standard value. The calibration of the signal output intensity and frequency accuracy of the dynamic interference simulation unit comprises inputting calibration signals to the dynamic interference simulation unit and adjusting the output parameters of the dynamic interference simulation unit so that the intensity and frequency of the interference signals output by the dynamic interference simulation unit are consistent with the preset values.

4. The rack-based over-the-air (OTA) performance testing method of a wireless communication device of claim 2, wherein, The test parameters at least comprise dynamic motion track parameters, interference signal type and intensity parameters.

5. The rack-based over-the-air (OTA) performance testing method for vehicle wireless communication devices of claim 1, wherein, The dynamic motion track parameters comprise motion speed, motion acceleration, motion dwell time and motion path to simulate the motion state of the device to be tested in actual use. The interference signal type and intensity parameters comprise the interference signal type determined according to the actual electromagnetic environment and the corresponding interference signal intensity value and frequency value. The test parameters further comprise network parameters, i.e. the communication frequency band and protocol type of the device to be tested.

6. The rack-based over-the-air (OTA) performance testing method for vehicle wireless communication devices of claim 5, wherein, The analysis of the received radiation performance data comprises:

7. The method of claim 1-6, wherein, adopting time domain analysis algorithms, frequency domain analysis algorithms and statistical analysis algorithms to filter and denoise the radiation performance data; statistically processing the processed radiation performance data, calculating the index parameter values and analyzing the performance changes of the device to be tested under different interference intensities and types in combination with the interference parameters to evaluate the anti-interference ability of the device. ​

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