Intelligent cockpit single Beidou test device and test method

Abstract

The invention provides an intelligent cockpit single Beidou test device and test method. The test device comprises a microwave darkroom, a rotary table and an arc guide rail. The arc guide rail is vertically arranged in the anechoic chamber, the rotary table is arranged on the bottom wall of the anechoic chamber in parallel, and the circle center of the arc guide rail coincides with the circle center of the rotary table; the 0-degree elevation angle of the arc guide rail is flush with the upper surface of the rotary table; the 90-degree elevation angle is located right above the test vehicle; a sliding antenna is connected to the arc guide rail in a sliding manner, and the sliding antenna is fixed in a short time every 5-15 degrees in the sliding process; and a wave-absorbing material is laid on the inner wall of the microwave darkroom. According to the invention, the adaptability of the intelligent cabin to Beidou signals in different geographical environments can be comprehensively tested; the single Beidou performance of the intelligent cockpit is accurately verified, reliable operation of the single Beidou navigation function in the intelligent cockpit is ensured, accurate route guidance and early warning information are provided, accurate position information can be provided in time in an emergency, rescue work is assisted, and driving safety is ensured.

Description

Technical Field

[0001] The present invention relates to the fields of satellite communication, automotive electronics, testing and measurement, computers, and a new generation of communication technology, and in particular, to the field of single Beidou testing technology for an intelligent cockpit of an intelligent networked vehicle; specifically, to a single Beidou testing device and a testing method for an intelligent cockpit. Background Art

[0002] In the smart cockpit related technologies, when the traditional smart cockpit testing method tests the smart cockpit, the complexity of the test set is low, the test coverage is relatively one-sided, and the update efficiency of the test set is low, which makes it difficult to accurately and efficiently obtain the test results of the single Beidou positioning performance of the smart cockpit. In addition, in the testing of the single Beidou terminal in the smart cockpit, the existing technology usually uses a signal simulator to place the single Beidou terminal of the smart cockpit to be tested in a shielding box. The Beidou signal emitted by the Beidou signal simulator is radiated through the antenna via the RF cable to measure the single Beidou terminal in the smart cockpit. Each single Beidou terminal in the smart cockpit to be tested needs to install an antenna in the shielding box to perform Beidou function and performance testing. The testing process is relatively complex and costly, especially when mass-produced on the factory production line, the efficiency is low. In order to solve these limitations of traditional testing methods, some new intelligent cockpit testing methods and single Beidou terminal testing systems have been proposed at this stage. For example, a testing system for a single Beidou terminal includes a Beidou signal simulator, a signal power divider and at least one single Beidou terminal to be tested. The Beidou signal simulator is used to generate a simulated single Beidou satellite signal; the signal power divider is connected to the Beidou signal simulator through a communication cable to receive a simulated single Beidou satellite signal; each single Beidou terminal to be tested is respectively connected to the signal power divider through a communication cable to receive a simulated single Beidou satellite signal, analyze the simulated single Beidou satellite signal, and compare the analyzed parameters with the original parameters of the simulated single Beidou satellite signal to obtain the test results. In this way, one Beidou signal simulator can be used to perform functional and performance tests on multiple single Beidou terminals to be tested at the same time, which is conducive to mass production on the production line, improving production efficiency and reducing production costs.

[0003] However, the existing test scheme using a signal power splitter can only test the receiving performance parameters of the single Beidou navigation system on the smart cockpit mainboard, while the actual application of the single Beidou navigation system in the smart cockpit is mostly complex road conditions and environments with signal interference, multipath effects and other working conditions. In addition, factors such as the on-board electronic wireless signals, vehicle materials and installation locations of different vehicles will also cause wireless interference, which will also affect the actual signal transmission and reception of the smart cockpit. Therefore, there is a big difference between the existing single Beidou terminal test scheme and the actual application of the single Beidou navigation system in the smart cockpit on the smart connected car. It cannot accurately verify the application performance of the single Beidou navigation system in the smart cockpit, and cannot guarantee the accuracy of functions such as navigation and positioning. It is easy to cause navigation errors due to positioning deviations. Summary of the invention

[0004] In view of this, the purpose of the present invention is to design an effective test device and test method, in an open signal environment with omnidirectional coverage of Beidou signals, conduct multi-directional and multi-angle whole-vehicle intelligent cockpit coupling test, quickly and comprehensively detect the compatibility and application performance of the intelligent cockpit with the single Beidou navigation system, improve test efficiency and accuracy, ensure the accurate, stable and reliable application of the intelligent cockpit to the single Beidou navigation system, and ensure that the intelligent cockpit can accurately receive and process the single Beidou satellite signal in various complex environments and working conditions, provide users with accurate navigation and positioning services, and reduce human intervention and errors; discover and solve possible problems such as signal delay and positioning deviation through testing, improve user satisfaction when using the single Beidou function of the intelligent cockpit, and optimize the user experience of the intelligent cockpit; through the good application of the accurate single Beidou navigation system in the intelligent cockpit, it is helpful to reduce the risk of accidents and ensure driving safety; by providing an effective intelligent cockpit single Beidou testing method, it is conducive to promoting the continuous improvement and perfection of the intelligent cockpit in the application of the single Beidou navigation system, and promoting the development and innovation of intelligent cockpit technology.

[0005] The present invention provides an intelligent cockpit single Beidou test device, comprising: a microwave darkroom, a turntable, and an arc guide rail; the arc guide rail is vertically arranged inside the microwave darkroom, the turntable is parallelly arranged on the bottom wall of the microwave darkroom, the center of the arc guide rail coincides with the center of the turntable, and the test vehicle is placed at the center of the turntable; the arc guide rail has an elevation angle range of 0-90°, and the elevation angle of 0° is flush with the upper surface of the turntable; the arc guide rail is located at the height of the test vehicle at a height angle of 90°. directly above; a sliding antenna is slidably connected to the circular arc guide rail, and the sliding antenna slides from one end of the circular arc guide rail at 0° to one end of the circular arc guide rail at 90°, or from one end of the circular arc guide rail at 90° to one end of the circular arc guide rail at 0°. The sliding antenna is fixed for a short period of time every 5-15° during the sliding process, so as to facilitate testing; an absorbing material is paved on the inner wall of the microwave darkroom, and preferably, the absorbing material is made of graphene composite material, which absorbs the electromagnetic wave energy received on the inner wall surface of the microwave darkroom and reduces the reflection interference of the electromagnetic wave.

[0006] Furthermore, the arc guide rail is made of high-density polyethylene (HDPE), and a nylon rack is arranged on the arc guide rail along the arc direction. The sliding antenna is connected to a gear made of polyformaldehyde, and the gear is meshed and transmission-connected with the rack. The sliding antenna is fixedly connected to a drive motor, and the output shaft of the drive motor is coaxially transmission-connected with the gear.

[0007] High-density polyethylene (HDPE) exhibits better performance in electromagnetic wave transmission. The transmittance of high-density polyethylene for electromagnetic waves in the micron and millimeter wave bands is as high as 90%-95%, so that the arc guide rail itself will not generate electromagnetic wave reflection interference.

[0008] The present invention adopts gears and racks made of non-metallic materials, thus avoiding electromagnetic wave reflection interference caused by gears and racks made of metallic materials.

[0009] Furthermore, the arc guide rail is fixedly connected to the bottom wall of the microwave darkroom at a height angle of 0°, and the rail body of the arc guide rail is fixedly connected to the top wall of the microwave darkroom, thereby ensuring the installation stability of the arc guide rail.

[0010] Preferably, one end of the 0° arc guide rail is fixedly connected to the bottom wall of the microwave darkroom by a bolt, and the rail body of the arc guide rail is hoisted and connected to the top wall of the microwave darkroom by multiple non-metallic ropes and cables. A two-way fixed installation method of upper rope hoisting and lower threaded fixing is adopted, which not only has high structural connection reliability, but also simple process, convenient installation and disassembly, and easy maintenance.

[0011] The present invention also provides a smart cockpit single Beidou test method, which is applied to the smart cockpit single Beidou test device as described above, and comprises the following steps: Absorbing materials are laid around the test vehicle, and the intelligent cockpit captures, receives and processes the simulated single Beidou satellite signal; For example, suitable absorbing materials are selected according to actual needs, such as graphene composite materials, polymer absorbing materials, etc.; the absorbing materials are firmly adhered and installed on the inner wall of the microwave darkroom using adhesives for the absorbing materials to prevent them from falling off or shifting; when installing the absorbing materials, the bonding surface of the absorbing materials needs to be gradually bonded to the inner wall surface, and lightly pressed with tools to eliminate possible bubbles; the edges of the installed absorbing materials are processed to ensure the fit between the absorbing materials and the inner wall surface, avoid wrinkling or falling off of the edges, give full play to the performance of the absorbing materials, and improve the electromagnetic wave control effect.

[0012] The test vehicle is parked on a turntable in a microwave darkroom. Preferably, absorbing materials are laid on the upper, lower, front, rear, left and right sides of the test vehicle. A Beidou signal simulator transmits a simulated single Beidou satellite signal through a sliding antenna. Specifically, the working frequency bands of the simulated single Beidou satellite signal include B1, B2 and B3 frequency bands; among which, the B1 frequency band is 1559.052MHz - 1591.788MHz, and the civilian nominal frequency is 1561.098MHz; the B2 frequency band is 1166.220MHz- 1217.370MHz; and the B3 frequency band is 1250.618MHz - 1286.423MHz; By laying absorbing materials around the test vehicle, the single Beidou satellite signal is prevented from being reflected or refracted back to the smart cockpit by the walls of the darkroom, ensuring the accuracy of the test.

[0013] By sliding the antenna on the circular guide rail, the satellite altitude angle of the test vehicle is changed within the range of 0-90°, and the vehicle is continuously rotated 0-360° horizontally at each fixed satellite altitude angle. The sliding antenna continuously transmits a simulated single Beidou satellite signal and continuously outputs the NMEA information of the smart cockpit. Increasing the satellite elevation angle has the following positive effects on horizontal positioning accuracy: (1) Improvement of geometric configuration: When the satellite elevation angle increases, the distribution of satellites involved in positioning in space becomes more favorable. This improves the geometric configuration between the satellite and the receiving device, thereby reducing the geometric dilution of precision (GDOP). GDOP is an important indicator for measuring positioning accuracy. The smaller the GDOP value, the higher the horizontal positioning accuracy.

[0014] For example, at higher satellite altitude angles, the relative angles between satellites vary greatly, which can provide more different observation directions and help improve positioning accuracy.

[0015] (2) Signal strength enhancement: A higher satellite altitude angle generally means that satellite signals are less blocked by obstacles during propagation, which increases the signal strength and quality received by the receiving device.

[0016] Strong signals can reduce the impact of signal noise and multipath effects, thereby improving the accuracy of horizontal positioning. For example, in open areas, when the satellite elevation angle is large, the receiving device can receive more stable and clearer satellite signals, which helps to improve the accuracy of positioning.

[0017] In the vehicle intelligent cockpit single Beidou navigation application positioning in urban environment, due to the obstruction of buildings, more consideration needs to be given to increasing the availability of elevation angle satellites in a lower range. According to the application requirements of intelligent cockpit single Beidou, the present invention selects a suitable satellite elevation angle range (0-90°) and positioning test method to achieve the best horizontal positioning accuracy.

[0018] Specifically, the intelligent cockpit of the test vehicle captures the simulated single Beidou satellite signal, receives and processes the simulated single Beidou signal, and obtains the NMEA information of the intelligent cockpit; the update frequency of the NMEA sentence information output by the intelligent cockpit is set (the preferred update frequency is 1Hz), and the NMEA information of the intelligent cockpit is output; the initial value and step angle of the satellite elevation angle of the test vehicle are set, the sliding antenna is rotated to the set satellite elevation angle within the range of 0-90°, the test vehicle is rotated continuously in the horizontal direction of 0-360°, the Beidou signal simulator continuously outputs the simulated single Beidou satellite signal through the sliding antenna, and the intelligent cockpit continuously spits out NMEA information, based on the NMEA information, the signal strength of the interaction between the intelligent cockpit and the single Beidou navigation system, the Beidou signal transmission stability, and the functional response speed are tested, the test results are obtained, and the test time is recorded; Preferably, the test vehicle can rotate continuously in the horizontal direction at 0-360°, and can also rotate back and forth in the horizontal direction at 0-360°; Preferably, the horizontal rotation speed of the test vehicle is 1-10 rpm, and this speed range is convenient for testing the smart cockpit receiving a single Beidou satellite signal.

[0019] As an important part of the automotive electronic system, the smart cockpit tests the accuracy of the positioning, navigation and timing information obtained by the smart cockpit from the simulated single Beidou satellite signal, and applies this information to the smart cockpit system to ensure that the smart cockpit can stably and reliably use the single Beidou navigation information to provide services for the driver and passengers during vehicle driving.

[0020] Based on the NMEA information, the interactive performance between the smart cockpit and the single Beidou navigation system is tested, the test results are obtained, and the test time is recorded.

[0021] Preferably, within the set satellite altitude angle range, the satellite altitude angle step angle is used as a base, the satellite altitude angle of the test vehicle is changed by the movement of the sliding antenna at an equal angle, and the test action is repeated to complete the test.

[0022] Specifically, based on the test data of the NMEA information of the smart cockpit, through 3D modeling analysis, we can study and analyze which direction the single Beidou satellite signal reception data is relatively poor, and quickly obtain the test results. We can determine whether it is due to the influence of the installation position, structure, software and hardware design of the smart cockpit itself, the influence of the directivity of the single Beidou antenna, and the influence of the car glass on the isolation of the Beidou signal. Accordingly, we will improve and optimize the installation position, structure, software and hardware design, antenna design, material design, etc. to improve the accuracy of the single Beidou satellite signal reception data.

[0023] Further, the method for changing the satellite elevation angle of the test vehicle within the range of 0-90° comprises the following steps: According to the relative position between the test vehicle and the transmitting source of the simulated single Beidou satellite signal, the initial value of the satellite elevation angle of the test vehicle is set; Based on the accuracy requirements of the test performance indicators, set the step angle of the satellite elevation angle of the test vehicle; The test vehicle is controlled to rotate horizontally and the sliding antenna is controlled to rotate in height, so as to realize multi-level changes of the satellite elevation angle.

[0024] The smart cockpit single Beidou test method can comprehensively test the signal strength received at all angles of the smart cockpit, the stability of Beidou signal transmission, and the response speed of the positioning function through omnidirectional testing. It covers multiple aspects of the interaction between the smart cockpit and the single Beidou navigation system, and comprehensively tests the smart cockpit's ability to adapt to single Beidou satellite signals in different geographical environments, verifying possible problems with the smart cockpit on the vehicle at a certain angle or direction.

[0025] Furthermore, the method for the smart cockpit to capture the simulated single Beidou satellite signal includes: comparing the smart cockpit with the single Beidou satellite signal on the comparison prototype to determine whether the smart cockpit has a single Beidou satellite signal; if the comparison prototype has a single Beidou satellite signal but the smart cockpit does not have a single Beidou satellite signal, it is determined that the single Beidou navigation system of the smart cockpit is not correctly turned on, and the single Beidou navigation system is turned on in a correct manner through software; If there is a single Beidou satellite signal on the comparison prototype and the smart cockpit also has a single Beidou satellite signal, it is determined that the smart cockpit has captured a simulated single Beidou satellite signal; If there is no single Beidou satellite signal on the comparison sample, but there is a single Beidou satellite signal on the smart cockpit, it is determined that the comparison sample is faulty. Replace the comparison sample and perform a new comparison to confirm that the smart cockpit captures the simulated single Beidou satellite signal. If there is no single Beidou satellite signal on the comparison prototype and the smart cockpit also has no single Beidou satellite signal, it is judged that the Beidou signal simulator is faulty. Replace the Beidou signal simulator and re-simulate the single Beidou satellite signal transmission to confirm that the smart cockpit has captured the simulated single Beidou satellite signal.

[0026] By comparing and judging the reception status of a single Beidou satellite signal, it is possible to promptly identify which component in the test has failed and handle it accordingly, effectively improving test efficiency.

[0027] Further, the method for outputting the NMEA information of the smart cockpit includes: determining whether the NMEA information of the smart cockpit can be correctly output; if the NMEA information cannot be output normally, it is determined that there are problems such as the single Beidou system of the smart cockpit is not correctly opened, the baud rate is incorrect, and the USB interface is faulty, and these problems are checked one by one, and the single Beidou system is opened in a correct way according to the checked problems; If the output is correct, the test result is obtained according to the output NMEA information.

[0028] By specifically judging whether the NMEA information output is correct, the fault can be quickly identified and the compatibility and application performance of the smart cockpit and the single Beidou navigation system can be comprehensively tested.

[0029] Furthermore, the step angle of the satellite elevation angle is set to 15°, and the set satellite elevation angle range of 0°-90° includes the angle value series 0°, 15°, 30°, 45°, 60°, 75°, and 90°. The multi-level pitch rotation angle with a progressive angle of 15° is conducive to multi-angle testing without increasing the amount of calculation due to excessive multi-level fineness. Preferably, the minimum step angle of the elevation angle is set to 5°, which can further improve the test accuracy of the multi-angle intelligent cockpit coupling test.

[0030] Preferably, test data with an altitude angle below 15° (because the altitude angle is small, the single Beidou signal strength received by the smart cockpit is small) can also be filtered out and ignored to improve the accuracy of the test results.

[0031] Optionally, automated collection and analysis of test data can be achieved through programming to improve test efficiency and accuracy.

[0032] The present invention ensures the precise performance of single Beidou satellite positioning through multi-directional and multi-angle intelligent cockpit coupling tests, and provides accurate positioning information for the use of single Beidou navigation positioning; and when using the vehicle networking V2X and emergency call functions, when danger occurs in the vehicle in front or in front, accurate Beidou positioning position information will be reported in time to facilitate rescue or danger avoidance of the following vehicle.

[0033] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the steps of the smart cockpit single Beidou testing method as described above are implemented.

[0034] The present invention also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the smart cockpit single Beidou test method as described above are implemented.

[0035] Compared with the prior art, the present invention has the following beneficial effects: The smart cockpit single Beidou test device and test method disclosed in the present invention can accurately detect the positioning deviation of the vehicle under complex road conditions and environments, and avoid navigation errors caused by positioning errors; it covers multiple aspects of the interaction between the smart cockpit and the single Beidou navigation system, including signal strength, Beidou signal transmission stability, functional response speed, etc., which enhances the comprehensiveness of the test; it comprehensively tests the adaptability of the smart cockpit to Beidou signals in different geographical environments; it adopts automated test processes and devices to reduce manual intervention, shorten test time, and improve test efficiency; it can more accurately detect the smart cockpit's ability to receive, process and apply single Beidou signals, ensure the accuracy of functions such as navigation and positioning, and improve test accuracy; through preset test scripts and automatic data analysis, it can quickly obtain test results and more accurately verify the single Beidou performance of the smart cockpit; it optimizes the performance of the smart cockpit, and according to the test results, it can carry out targeted installation position, structural design, software and hardware design, antenna design, and vehicle Improvements and optimizations in glass material design can enhance the collaborative working performance with the Beidou system; ensure the reliable operation of the single Beidou navigation function in the smart cockpit, provide accurate route guidance and warning information, and provide accurate location information in an emergency to assist rescue work and ensure driving safety; this test solution can reduce repeated testing and unnecessary resource consumption, reduce testing costs as well as R&D and production costs, and reduce subsequent additional costs incurred due to problem troubleshooting through a comprehensive test; enhance user experience, reduce signal interruptions and route deviations during navigation, and make user travel smoother, provide users with more stable, accurate and convenient single Beidou navigation services, and enhance the overall user experience of the smart cockpit; this test solution promotes the widespread application and optimization of the single Beidou navigation system in smart cockpits, promotes the application of Beidou technology in the automotive field, and makes more auto brands willing to adopt smart cockpit solutions based on single Beidou, which will help improve the technical level and competitiveness of my country's automotive industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0037] In the attached picture: Figure 1 A schematic diagram of a scenario of a single Beidou test in a smart cockpit according to an embodiment of the present invention; Figure 2 A rotation diagram of a single Beidou test for a smart cockpit according to an embodiment of the present invention; Figure 3 This is a flow chart of a smart cockpit single Beidou testing method of the present invention; Figure 4The figure is a schematic diagram of the structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and products consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0040] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0041] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0042] Example The embodiment of the present invention provides a smart cockpit single Beidou test device, see Figure 2 As shown, a circular arc guide rail made of high-density polyethylene (HDPE) is vertically installed inside a microwave darkroom, a turntable is arranged parallel to the bottom wall of the microwave darkroom, and the center of the circular arc guide rail coincides with the center of the turntable; the turntable rotates horizontally 0-360° relative to the bottom wall of the microwave darkroom, and the test vehicle is placed at the center of the turntable; the height angle range of the circular arc guide rail is 0-90°, the height angle 0° of the circular arc guide rail is fixedly connected to the bottom wall of the microwave darkroom, and the height angle 0° is flush with the upper surface of the turntable; the height angle 90° of the circular arc guide rail is located directly above the test vehicle; the sliding antenna is slidably connected to the circular arc guide rail, and the sliding antenna slides from one end of the circular arc guide rail at 0° to one end of the circular arc guide rail at 90°, or from one end of the circular arc guide rail at 90° to one end of the circular arc guide rail at 0°, and the sliding antenna is fixed for a short time every 5-15° during the sliding process to facilitate testing; The high-density polyethylene (HDPE) used in this embodiment has a transmittance of up to 90%-95% for electromagnetic waves in the micrometer and millimeter wave bands, so that the arc guide rail itself will not generate electromagnetic wave reflection interference.

[0043] A nylon rack is arranged along the arc direction on the circular arc guide rail, a gear made of polyformaldehyde is connected to the sliding antenna, the gear and the rack are meshed and connected, the sliding antenna is fixedly connected to a drive motor, and the output shaft of the drive motor is coaxially connected to the gear; the use of non-metallic gears and racks avoids electromagnetic wave reflection interference caused by metal materials. The 0° end of the circular arc guide rail is fixedly connected to the bottom wall of the microwave darkroom by bolts, and the rail body of the circular arc guide rail is connected to the top wall of the microwave darkroom by non-metallic ropes and cables, which ensures the installation stability of the circular arc guide rail. The installation method of bidirectional fixing with upper rope lifting and lower thread fixing is adopted, which not only has high structural connection reliability, but also has simple process, convenient installation and disassembly, and is easy to maintain.

[0044] The inner wall of the microwave darkroom is paved with a graphene composite material absorbing material to absorb the electromagnetic wave energy received on the surface of the inner wall of the microwave darkroom, thereby reducing the reflection interference of the electromagnetic waves.

[0045] The embodiment of the present invention also provides a smart cockpit single Beidou test method, which is applied to the smart cockpit single Beidou test device as described above, comprising the following steps (see Figure 3 shown): S1. Lay absorbing materials around the test vehicle, and use the smart cockpit to capture, receive and process the simulated single Beidou satellite signal; Specifically, the test vehicle is parked on a turntable in a microwave darkroom, and absorbing materials are laid on the six sides of the test vehicle: top, bottom, front, back, left, and right. A Beidou signal simulator transmits a simulated single Beidou satellite signal through a sliding antenna. Select absorbing materials made of graphene composite materials, and firmly stick and install them on the inner wall of the microwave darkroom to prevent them from falling off or shifting; when installing the absorbing materials, gradually stick the bonding surface of the absorbing materials to the inner wall surface, and press lightly with tools to eliminate possible bubbles; process the edges of the installed absorbing materials to ensure the fit between the absorbing materials and the inner wall surface, avoid wrinkling or falling off of the edges, give full play to the performance of the absorbing materials, and improve the electromagnetic wave control effect.

[0046] In this embodiment, the working frequency bands for simulating a single Beidou satellite signal include B1, B2 and B3 frequency bands; among which, the B1 frequency band is 1559.052MHz - 1591.788MHz, and the civilian nominal frequency is 1561.098MHz; the B2 frequency band is 1166.220MHz -1217.370MHz; and the B3 frequency band is 1250.618MHz - 1286.423MHz; Preferably, the isolation of the microwave darkroom meets GJBZ-20219-94B level, which is specifically manifested as having a specific shielding effectiveness within a certain frequency range: 400M-6G ≥ 100dB, 6G-18G ≥ 90dB; Space size: Overall dimensions such as 10m (length) × 8m (width) × 8m (height); Environmental requirements: including temperature, humidity and power supply stability, etc. Temperature: It is required to be within a relatively stable range of 18 - 25°C to ensure the stability of the performance of the test equipment and reduce the impact of temperature changes on the measurement results. The temperature fluctuation should be as small as possible to avoid deformation of equipment and structure due to thermal expansion and contraction.

[0047] Humidity: Control the relative humidity within the range of 40% - 60%. Too high or too low humidity may affect the normal operation of electronic equipment and the performance of absorbing materials.

[0048] Power supply stability: The voltage fluctuation should be small, and the voltage change should be within ±5%, that is, the power supply voltage should be stable at 220V±11V to ensure the normal operation of the test equipment. The power supply frequency should be stable at 50Hz±1Hz. The harmonic distortion of the power supply should be low to prevent interference with the test equipment.

[0049] The dust particles in the air should be as small as possible to prevent dust from adhering to the equipment and absorbing materials and affecting performance. Air purification and filtration should be performed regularly to ensure cleanliness.

[0050] The lighting intensity should be moderate, neither too bright to affect the test nor too dark to affect operation and maintenance. The electromagnetic interference of the lighting equipment should be small to avoid affecting the test.

[0051] Ensure good ventilation to remove the heat generated by the equipment and keep the indoor air fresh. The ventilation system should be low noise to avoid interfering with the test.

[0052] The smart cockpit of the test vehicle receives and processes the simulated single Beidou signal, compares the smart cockpit with the single Beidou satellite signal on the comparison prototype, and determines whether the smart cockpit has a single Beidou satellite signal; if the comparison prototype has a single Beidou satellite signal, but the smart cockpit does not have a single Beidou satellite signal, it is determined that the single Beidou navigation system of the smart cockpit is not correctly turned on, and the single Beidou navigation system is turned on in the correct way through the software; if the comparison prototype has a single Beidou satellite signal, and the smart cockpit also has a single Beidou satellite signal, it is determined that the smart cockpit has captured a simulated single Beidou satellite signal; if the comparison prototype does not have a single Beidou satellite signal, but the smart cockpit has a single Beidou satellite signal, it is determined that the comparison prototype is faulty, replace the comparison prototype and re-compare, and confirm that the smart cockpit has captured a simulated single Beidou satellite signal; if the comparison prototype does not have a single Beidou satellite signal, and the smart cockpit does not have a single Beidou satellite signal, it is determined that the Beidou signal simulator is faulty, replace the Beidou signal simulator and re-transmit the simulated single Beidou satellite signal to confirm that the smart cockpit has captured a simulated single Beidou satellite signal; Set the update frequency of the NMEA sentence information output by the smart cockpit, and output the NMEA information of the smart cockpit; in this embodiment, the update frequency of the NMEA sentence information is set to 1Hz. Determine whether the NMEA information of the smart cockpit can be correctly output; if it cannot be output normally, it is determined that there are problems such as the single Beidou system of the smart cockpit is not opened correctly, the baud rate is incorrect, and the USB interface is faulty. These problems are checked one by one, and the single Beidou system is opened in the correct way according to the checked problems; if it can be output correctly, the test results are obtained according to the output NMEA information.

[0053] S2. By sliding the antenna on the circular guide rail, the satellite altitude angle of the test vehicle is changed within the range of 0-90°, and a continuous rotation of 0-360° in the horizontal direction is performed at each fixed satellite altitude angle (such as Figure 2 As shown in the figure), the sliding antenna continuously transmits a simulated single Beidou satellite signal and continuously outputs the NMEA information of the smart cockpit; Specifically, the initial value and step angle of the satellite altitude angle of the test vehicle are set. At a fixed satellite altitude angle, the vehicle is rotated continuously from 0 to 360 degrees in the horizontal direction. The Beidou signal simulator continuously outputs simulated single Beidou satellite signals through a sliding antenna, and the smart cockpit continuously spits out NMEA information. Based on the NMEA information, the signal strength, Beidou signal transmission stability, and functional response speed of the interaction between the smart cockpit and the single Beidou navigation system are tested. The test results are obtained and the test time is recorded. In this embodiment, the horizontal rotation speed of the test vehicle is 1-10 rpm.

[0054] Preferably, within the set satellite altitude angle range, the satellite altitude angle step angle is used as a base, the satellite altitude angle of the test vehicle is changed by the movement of the sliding antenna at an equal angle, and the action of step S2 is repeatedly executed to complete the test.

[0055] In this embodiment, the step angle of the satellite elevation angle is set to 15°. Figure 1 As shown, the set satellite elevation angle range of 0°-90° includes the angle value series 0°, 15°, 30°, 45°, 60°, 75°, and 90°. The test data with satellite elevation angles below 15° are omitted.

[0056] S3. Test the interactive performance between the smart cockpit and the single Beidou navigation system based on the NMEA information, obtain the test results, and record the test time.

[0057] Preferably, a 3D test result model is established based on the test data of the NMEA information of the smart cockpit, and through the preset test script and automatic data analysis, the specific direction of the single Beidou satellite signal reception data is analyzed and the test results are obtained quickly. It is determined whether the installation position, structure, software and hardware design of the smart cockpit itself, the directivity of the single Beidou antenna, the influence of the automobile glass on the isolation of the Beidou signal, etc., and the installation position, structure, software and hardware design, antenna design, material design, etc. are improved and optimized accordingly to make the single Beidou satellite signal reception data accurate.

[0058] The embodiment of the present invention includes the following steps in an actual test process: 1. Test preparation: 1. Install the antenna of the single Beidou navigation system of the smart cockpit in place; 2. Provide the smart cockpit with the same type of smart connected car; 3. Confirm that the smart cockpit can correctly output NMEA sentence information; 2. Data processing: 1. Save the NEMA information of the smart cockpit in .txt format and name it DBD, saving it as DBD.txt file; 2. Import the DBD.txt file into the smart cockpit single Beidou test tool to determine the test data under the fixed altitude angle to be calculated; 3. Select the Beidou $BDGSV data to be calculated, and filter out the maximum value of the carrier-to-noise ratio C / N0 in each Beidou $BDGSV data; 4. The intelligent cockpit single Beidou test tool automatically processes data and displays the test results in the form of table data and 3D models; 5. Set the satellite elevation angle range to 0°-90°. To reduce test errors and improve data calculation accuracy during testing, this test device removes data with satellite elevation angles below 15°, selects test data with satellite elevation angles of 15°-90°, and configures the full-week average receiving level of each satellite elevation angle to be above the receiver's minimum capture sensitivity.

[0059] An embodiment of the present invention further provides a computer device, Figure 4 is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention; see the accompanying drawings Figure 4 As shown, the computer device includes: an input device 23, an output device 24, a memory 22 and a processor 21; the memory 22 is used to store one or more programs; when the one or more programs are executed by the one or more processors 21, the one or more processors 21 implement the smart cockpit single Beidou test method provided in the above embodiment; wherein the input device 23, the output device 24, the memory 22 and the processor 21 can be connected by a bus or other means, Figure 4 The example of connecting through bus is taken in the following.

[0060] The memory 22 is a readable and writable storage medium of a computing device, which can be used to store software programs and computer executable programs, such as the program instructions corresponding to the intelligent cockpit single Beidou test method described in the embodiment of the present invention; the memory 22 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function; the data storage area can store data created according to the use of the device, etc.; in addition, the memory 22 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device; in some instances, the memory 22 can further include a memory remotely arranged relative to the processor 21, and these remote memories can be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0061] The input device 23 may be used to receive input digital or character information, and to generate key signal input related to user settings and function control of the device; the output device 24 may include a display device such as a display screen.

[0062] The processor 21 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 22, that is, realizes the above-mentioned smart cockpit single Beidou test method.

[0063] The computer device provided above can be used to execute the smart cockpit single Beidou testing method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0064] The embodiment of the present invention also provides a storage medium containing computer executable instructions, which are used to execute the intelligent cockpit single Beidou test method provided in the above embodiment when executed by a computer processor. The storage medium is any of various types of memory devices or storage devices, and the storage medium includes: installation media, such as CD-ROM, floppy disk or tape device; computer system memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disk or optical storage); registers or other similar types of memory components, etc.; the storage medium may also include other types of memory or combinations thereof; in addition, the storage medium may be located in the first computer system in which the program is executed, or may be located in a different second computer system, which is connected to the first computer system via a network (such as the Internet); the second computer system may provide program instructions to the first computer for execution. The storage medium includes two or more storage media that can reside in different locations (for example, in different computer systems connected via a network). The storage medium can store program instructions (for example, specifically implemented as a computer program) that can be executed by one or more processors.

[0065] Of course, the storage medium containing computer executable instructions provided in an embodiment of the present invention is not limited to the smart cockpit single Beidou test method described in the above embodiment, and the computer executable instructions can also execute the relevant operations in the smart cockpit single Beidou test method provided in any embodiment of the present invention.

[0066] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent cockpit single Beidou test device, characterized in that: include: A microwave darkroom, a turntable, and an arc guide rail; the arc guide rail is vertically arranged inside the microwave darkroom, the turntable is parallelly arranged on the bottom wall of the microwave darkroom, the center of the arc guide rail coincides with the center of the turntable, and the test vehicle is placed at the center of the turntable; the arc guide rail has an elevation angle range of 0-90°, and the arc guide rail is flush with the upper surface of the turntable at an elevation angle of 0°; the arc guide rail is located directly above the test vehicle at an elevation angle of 90°; A sliding antenna is slidably connected to the circular arc guide rail. The sliding antenna slides from one end of the circular arc guide rail at 0° to one end of the circular arc guide rail at 90°, or from one end of the circular arc guide rail at 90° to one end of the circular arc guide rail at 0°. The sliding antenna is fixed for a short period of time every 5-15° during the sliding process. The inner wall of the microwave darkroom is paved with absorbing material.

2. The intelligent cockpit single Beidou test device according to claim 1 is characterized in that: The arc guide rail is made of high-density polyethylene (HDPE), and a nylon rack is arranged on the arc guide rail along the arc direction. The sliding antenna is connected to a gear made of polyoxymethylene, and the gear is meshed and transmission-connected with the rack. The sliding antenna is fixedly connected to a drive motor, and the output shaft of the drive motor is coaxially transmission-connected with the gear.

3. The intelligent cockpit single Beidou test device according to claim 1, characterized in that: The arc guide rail is fixedly connected to the bottom wall of the microwave darkroom at a height angle of 0°, and the rail body of the arc guide rail is fixedly connected to the top wall of the microwave darkroom.

4. The intelligent cockpit single Beidou test device according to claim 3 is characterized in that: One end of the circular arc guide rail at 0° is threadedly fixedly connected to the bottom wall of the microwave darkroom through a bolt, and the rail body of the circular arc guide rail is hoisted and connected to the top wall of the microwave darkroom through a plurality of non-metallic cables.

5. A smart cockpit single Beidou test method, applied to the smart cockpit single Beidou test device according to any one of claims 1 to 4, characterized in that: The following steps are involved: Absorbing materials are laid around the test vehicle, and the intelligent cockpit captures, receives and processes the simulated single Beidou satellite signal; By sliding the antenna on the circular guide rail, the satellite altitude angle of the test vehicle is changed within the range of 0-90°, and the vehicle is continuously rotated 0-360° horizontally at each fixed satellite altitude angle. The sliding antenna continuously transmits a simulated single Beidou satellite signal and continuously outputs the NMEA information of the smart cockpit. Based on the NMEA information, the interactive performance between the smart cockpit and the single Beidou navigation system is tested, the test results are obtained, and the test time is recorded.

6. The intelligent cockpit single Beidou test method according to claim 5 is characterized in that: The method for changing the satellite elevation angle of the test vehicle within the range of 0-90° comprises the following steps: According to the relative position between the test vehicle and the transmitting source of the simulated single Beidou satellite signal, the initial value of the satellite elevation angle of the test vehicle is set; Based on the accuracy requirements of the test performance indicators, set the step angle of the satellite elevation angle of the test vehicle; The sliding antenna is controlled and driven to rotate in the height direction to achieve multi-level changes in the satellite elevation angle.

7. The intelligent cockpit single Beidou testing method according to claim 6 is characterized in that: The method for capturing a simulated single Beidou satellite signal comprises: comparing the single Beidou satellite signal on the smart cockpit with that on the comparison prototype to determine whether the smart cockpit has a single Beidou satellite signal; if the comparison prototype has a single Beidou satellite signal but the smart cockpit does not have a single Beidou satellite signal, it is determined that the single Beidou navigation system of the smart cockpit is not correctly turned on, and the single Beidou navigation system is turned on in a correct manner through software; If there is a single Beidou satellite signal on the comparison prototype and the smart cockpit also has a single Beidou satellite signal, it is determined that the smart cockpit has captured a simulated single Beidou satellite signal; If there is no single Beidou satellite signal on the comparison sample, but there is a single Beidou satellite signal on the smart cockpit, it is determined that the comparison sample is faulty. Replace the comparison sample and perform a new comparison to confirm that the smart cockpit captures the simulated single Beidou satellite signal. If there is no single Beidou satellite signal on the comparison prototype and the smart cockpit also has no single Beidou satellite signal, it is judged that the Beidou signal simulator is faulty. Replace the Beidou signal simulator and re-simulate the single Beidou satellite signal transmission to confirm that the smart cockpit has captured the simulated single Beidou satellite signal.

8. The intelligent cockpit single Beidou testing method according to claim 6 is characterized in that: The method for outputting the NMEA information of the smart cockpit includes: determining whether the NMEA information of the smart cockpit can be correctly output; if the NMEA information cannot be output normally, it is determined that there is a problem that the single Beidou system of the smart cockpit is not correctly opened, the baud rate is incorrect, and the USB interface is faulty, and these problems are checked one by one, and the single Beidou system is opened in a correct way according to the checked problems; If the output is correct, the test result is obtained according to the output NMEA information.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, the steps of the smart cockpit single Beidou testing method described in any one of claims 5-8 are implemented.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the smart cockpit single Beidou testing method as described in any one of claims 5-8 are implemented.

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