Automobile test data acquisition system and method

Abstract

The invention discloses an automobile test data acquisition system and method. A vehicle-mounted terminal comprises a bus data processing module, a state indicating lamp, an audio and video processing module, an SD card storage module, a main control module, a Beidou signal processing module, a direct-current power supply processing module, an LTE signal processing module, an area width antenna signal processing module and a peripheral module. The CAN bus / K bus / LIN bus data processing module is connected with an OBD module of a tested wheeled vehicle and used for collecting bus data of the tested wheeled vehicle. The camera is connected with the audio and video processing module; the Beidou antenna is connected with the Beidou signal processing module and is used for receiving a Beidou positioning signal and a Beidou clock time service signal; the battery pack is connected with the direct-current power supply processing module; according to the invention, the data acquisition process in the reliable driving of the wheeled vehicle is improved, the situations of recording errors and calculation errors possibly occurring in manual recording and calculation are avoided, and the data accuracy and the test efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of wheeled vehicle reliability driving test technology, specifically to an automobile test data acquisition system and data acquisition method. Background Technology

[0002] In recent years, my country's automobile production and exports have been increasing year by year, especially the export volume of new energy vehicles, which has firmly ranked first in the world. While many automakers are constantly developing new fuel vehicles, numerous new energy vehicles are also under development. In the reliability driving test of wheeled vehicles, by simulating long-term extreme conditions and daily use on various road surfaces, the test can discover potential design and manufacturing problems of the vehicle, such as chassis performance, component wear and failure, engine performance, etc., providing data support for design improvement.

[0003] In traditional wheeled vehicle reliability driving tests, mileage data is obtained from the vehicle's odometer, and the process of recording and calculating this data is manual, inevitably leading to recording errors. When a vehicle malfunctions, the lack of specific data means that testers must manually access the vehicle's data bus to retrieve data, resulting in inefficient testing.

[0004] Therefore, designing automotive test data acquisition systems and methods to improve data acquisition during reliable driving of wheeled vehicles and thus increase testing efficiency has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide an automotive test data acquisition system and data acquisition method to solve the technical problems of low automation and low acquisition efficiency in automotive test data acquisition in the prior art.

[0006] This invention provides an automotive test data acquisition system, comprising:

[0007] The vehicle-mounted terminal includes a CAN bus / K bus / LIN bus data processing module, status indicator lights, audio and video processing module, SD card storage module, main control module, Beidou signal processing module, DC power supply processing module, LTE signal processing module, wideband antenna signal processing module, and peripheral modules. The CAN bus / K bus / LIN bus data processing module is connected to the OBD module of the wheeled vehicle under test and is used to collect bus data of the wheeled vehicle under test.

[0008] A camera, which is connected to an audio / video processing module;

[0009] The Beidou antenna, which is connected to the Beidou signal processing module, is used to receive Beidou positioning signals and Beidou clock timing signals.

[0010] The battery pack is connected to the DC power processing module;

[0011] The wideband antenna, connected to the wideband antenna signal processing module, is used to transmit and receive wireless signals and transmit the data collected by the vehicle terminal to the host computer processing server.

[0012] Preferably, the DC power processing module is also connected to the cigarette lighter of the wheeled vehicle under test. The cigarette lighter supplies power to the vehicle terminal and charges the battery pack through the DC power processing module. When the cigarette lighter's power is insufficient or the power is cut off, the battery pack supplies power to the vehicle terminal.

[0013] The voltage range from 9VDC to 36VDC is supplied by the cigarette lighter to the DC power processing module. The DC power processing module converts the DC signal into 12VDC to power the internal modules and battery pack of the vehicle terminal.

[0014] Preferably, the system includes multiple cameras, one of which faces the front of the driver's cab to capture real-time road conditions, another camera faces the driver to record the driver's behavior, and the remaining cameras are for backup to capture real-time conditions around the wheeled vehicle under test. The audio and video processing module also includes a microphone and a speaker to collect the driver's voice information and transmit voice commands from the backend.

[0015] Preferably, when the wideband antenna signal is disconnected, the OBD data information, Beidou positioning information, Beidou timing information, audio and video information, and the vehicle terminal's own operation log information of the tested wheeled vehicle are temporarily stored in the SD card storage module, and the memory of the SD card storage module is not less than 64GB; when the wideband antenna signal is restored, the temporarily stored information is sent to the host computer processing server by interpolation.

[0016] Status indicator lights display the status of the vehicle terminal, including power supply voltage, positioning data, vehicle terminal equipment malfunction, OBD data acquisition, and wireless data transmission and reception. The LTE signal processing module is used for wireless signal transmission and processing. The main control module connects to other modules in the vehicle terminal and handles internal data flow. Peripheral modules include external interfaces for offline debugging and offline program updates. The host computer processing server is used for remotely issuing voice control commands, reading / storing / calculating all data from the vehicle terminal, displaying the real-time location of the vehicle under test, displaying the vehicle's driving trajectory, and exporting daily reliability driving reports.

[0017] A data acquisition method for an automotive test data acquisition system, characterized by comprising the following steps:

[0018] Step 1: Install the camera, wideband antenna, Beidou antenna, and battery pack, and connect them to the vehicle terminal. Connect the vehicle terminal to the OBD module and cigarette lighter of the wheeled vehicle under test. Turn on the power switch of the vehicle terminal and check whether the status indicator lights are normal.

[0019] Step 2: Based on the chassis model or engine model of the wheeled vehicle being tested, select the corresponding OBD data processing protocol on the host computer processing server, set the reporting frequency of the vehicle terminal data, set the video encoding format of the vehicle terminal, set the audio encoding format of the vehicle terminal, and send it to the vehicle terminal.

[0020] Step 3: Based on the road sections where the tested wheeled vehicle will operate reliably, the operating area and geofences are pre-defined on the host computer processing server. When the tested wheeled vehicle travels outside this area, an audio / video alert is sent to the driver via the onboard terminal's audio / video processing module. The host computer processing server records the time and location of the boundary violation and alerts the backend supervisor via flashing text. For the specific road sections the tested wheeled vehicle will travel on, minimum and maximum speed limits are set for those sections. When the tested wheeled vehicle's speed in a section does not meet the set requirements, an audio alert is sent to the driver. The system records the vehicle's speed and location on the host computer processing server and alerts the backend supervisor via flashing text. It also uses cameras to monitor driver behavior in real time; when a violation occurs, it sends an audible alert to the driver and records a video screenshot, location, and speed on the host computer processing server, alerting the backend supervisor via flashing text. Furthermore, when the onboard terminal reads a fault code from the OBD module of the tested wheeled vehicle, it sends an audible alert to the driver and records the vehicle's location and speed on the host computer processing server, alerting the backend supervisor via flashing text.

[0021] Step 4: During the reliability driving process of the wheeled vehicle under test according to the specific test task, the on-board terminal collects and processes test data in real time through the OBD module, Beidou antenna, camera, audio and video processing module, and wideband antenna, and sends the data to the host computer processing server in real time through the wideband antenna.

[0022] Step 5: The host computer processing server saves and records the data information uploaded by the vehicle terminal, and displays the longitude, latitude, height, speed, gear, driver video information, driving time, and mileage of the tested wheeled vehicle in real time.

[0023] Step 6: When the daily reliability driving test ends, the host computer processing server generates and exports the daily reliability driving test record report.

[0024] Preferably, the host computer processing server generates and exports daily reliability driving data reports. The report content includes: driving road type, start driving time, stop driving time, driving time, driving distance on the driving road, total driving distance, average speed, fuel amount, driver information, alarm information, weather conditions, and fault conditions.

[0025] The host computer processing server stores all data from the entire reliability test driving process, including but not limited to the fault codes, location information, gear information, engine speed, total mileage, mileage on a single type of road surface, driving trajectory, tire pressure, and driving time on a single type of road surface of the tested wheeled vehicle. The fuel amount, driver information, and weather information are manually entered daily by the back-end supervisor. The sources of fault information include fault codes read by the on-board terminal through the OBD interface of the tested wheeled vehicle, as well as fault information on the chassis and frame appearance of the tested wheeled vehicle that the tester visually observes.

[0026] The preferred method for obtaining the vehicle speed Vi data of the wheeled vehicle under test is as follows:

[0027] Vi = (1 + K1 - K2 * K3)Vt + (1 + K2 * K3 - K1)V't, where K3 is the actual receiving frequency of the vehicle terminal for collecting vehicle speed information via Beidou signal; Vt is the vehicle speed read by the vehicle terminal from the bus of the wheeled vehicle under test via the ODB module; and V't is the vehicle speed obtained by the vehicle terminal via Beidou signal.

[0028] Where Xi is the cumulative difference in vehicle speed sampled by the ODB module during the i-th data upload period, and ΔX is the set value of the cumulative difference in vehicle speed sampled by the ODB module; V i,j Let m be the vehicle speed sampled by the ODB module in the i-th data upload cycle, m be the number of vehicle speed samples taken in one ODB module data upload cycle, ΔV be the set value of the vehicle speed sampled by the ODB module, and u1 and w1 be fixed weighting coefficients.

[0029]

[0030] Where Yi is the cumulative difference in vehicle speed sampled by the BeiDou signal during the i-th data upload cycle, and ΔY is the set value of the cumulative difference in vehicle speed sampled by the BeiDou signal; V' i,j Let be the vehicle speed sampled in the j-th sampling period of the BeiDou signal, n be the number of sampling vehicle speeds in one BeiDou signal data upload period, ΔV' be the set value of the BeiDou signal sampling vehicle speed; u2 and w2 are fixed weighting coefficients;

[0031] Preferably, the method for obtaining the mileage data of the tested wheeled vehicle is as follows: The host computer processing server calculates the mileage for each reported data transmission from the onboard terminal (f) and the reported speed (Vi) of the tested wheeled vehicle, based on the set reporting frequency f and the reported speed (Vi) of the tested wheeled vehicle. This mileage is then accumulated over time to obtain the total mileage. According to the characteristics of the road section, the test road section is divided into different test road surface types, including: highway, off-road, light reinforced road, heavy reinforced road, uneven road, cobblestone road, pothole road, bumpy road, twisted road, and Belgian road. The total mileage of the tested wheeled vehicle is the sum of the mileage across all test road surface types, as shown in the following formula:

[0032] The mileage di' for each reported vehicle speed is:

[0033] di' = Vi * (1 / f), where 1 / f is the signal upload period of the vehicle terminal;

[0034] The distance Di′ traveled on the i-th road surface is:

[0035] p represents the number of upload cycles required to travel on this road surface;

[0036] In this reliability driving test, the total driving mileage D is:

[0037] q represents the number of different road surface types in the test.

[0038] Preferably, different positioning coordinates are divided on the test road surface for calibration and identification. When the host computer processing server reads the positioning data of the wheeled vehicle under test and finds that it is on a certain type of test road surface, it starts to calculate the mileage and travel time Ti′ of this road segment. The calculation formula is as follows:

[0039] Ti′=Σ(t f -t n )

[0040] Wherein, the start time t n The determination method is as follows: when the real-time speed Vt of the tested wheeled vehicle is ≥ 5 km / h and the duration is greater than 5 seconds, the tested wheeled vehicle is determined to have started moving, and this time is called the start time t. n ;

[0041] Stopping time t f The determination method is as follows: when the parking flag bit in the OBD data of the tested wheeled vehicle is read to be 1, it is determined that the tested wheeled vehicle has stopped moving. This time is the time t when it stops moving. f ;

[0042] The timing in the calculation process all comes from the BeiDou clock timing signal.

[0043] Preferably, the method for obtaining the average speed data of the wheeled vehicle under test on a certain test road surface type is as follows: divide the mileage traveled on a certain test road surface type by the travel time on that road surface to obtain the average speed on that road surface.

[0044]

[0045] Beneficial effects:

[0046] 1. This embodiment provides an automotive test data acquisition system and method that can automatically collect and calculate data such as mileage, driving time, location, and gear position during reliable driving processes. This avoids recording errors and calculation mistakes that may occur when manually recording and calculating data, improving data accuracy, testing efficiency, and data reliability to support multi-dimensional reliability analysis. Furthermore, the acquisition system of this invention is adaptable to various vehicle models with different communication protocols, demonstrating strong applicability.

[0047] 2. The vehicle test data acquisition system and data acquisition method provided in this embodiment can effectively avoid some illegal driving behaviors and illegal operation behaviors of drivers during reliability driving by using the positioning data of the vehicle under test, defining the driving speed on different road surfaces, and using camera monitoring and other means, thus avoiding driving on non-required road surfaces and improving the accuracy of reliability driving tests.

[0048] 3. The vehicle test data acquisition system and data acquisition method provided in this embodiment can provide effective data support for fault prediction, fault source, fault troubleshooting, fault repair, and structural upgrade and improvement in reliability driving tests, thereby improving the R&D progress of wheeled vehicles and realizing the electronic management of storage and output documents.

[0049] 4. The vehicle speed calculation formula provided by this invention can eliminate the error of vehicle speed collected by Beidou signal and ODB module. When the error of vehicle speed collected by Beidou signal or ODB module is large, the weight ratio of vehicle speed collected by Beidou signal or ODB module can be eliminated, while the weight ratio of the other can be increased, thereby improving the accuracy of vehicle speed collection.

[0050] Meanwhile, when the BeiDou signal is normal and strong, the weight of the vehicle speed obtained from BeiDou positioning is increased, and the actual vehicle speed is sent to the host computer processing server; when the BeiDou signal is weak, the weight of BeiDou signal speed measurement is reduced, and the weight of vehicle speed read by the ODB module is increased, and the actual vehicle speed is sent to the host computer processing server, thus avoiding the technical problem of large vehicle speed errors caused by unstable BeiDou signals. Attached Figure Description

[0051] The features and advantages of the invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the invention in any way. In the drawings:

[0052] Figure 1 A schematic diagram of an automotive test data acquisition system according to an embodiment of the present invention is shown;

[0053] Figure 2 A schematic diagram of a vehicle test data acquisition method according to an embodiment of the present invention is shown;

[0054] Figure 3 The diagram shows the original flow of a vehicle test data acquisition method according to an embodiment of the present invention. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] This invention provides an automotive test data acquisition system, such as... Figure 1 As shown, it includes: an in-vehicle terminal, a camera, a Beidou antenna, a battery pack, a broadband antenna, and a host computer processing server. The in-vehicle terminal includes a CAN bus / K bus / LIN bus data processing module, status indicator lights, an audio / video processing module, an SD card storage module, a main control module, a Beidou signal processing module, a DC power supply processing module, an LTE signal processing module, a broadband antenna signal processing module, and peripheral modules.

[0058] The CAN bus / K bus / LIN bus data processing module of the vehicle terminal is connected to the OBD module of the wheeled vehicle under test; the DC power processing module of the vehicle terminal is connected to the cigarette lighter and the battery pack of the wheeled vehicle under test; the camera is connected to the audio and video processing module of the vehicle terminal; the Beidou antenna is connected to the Beidou signal processing module of the vehicle terminal; and the wideband antenna is connected to the wideband antenna signal processing module of the vehicle terminal.

[0059] The CAN bus / K bus / LIN bus data processing module of the vehicle-mounted terminal is connected to the OBD module of the wheeled vehicle under test to collect bus data. The DC power processing module of the vehicle-mounted terminal is connected to the cigarette lighter of the wheeled vehicle under test and to the battery pack. The cigarette lighter powers the DC power processing module, which in turn powers all devices in the vehicle-mounted terminal and charges the battery pack when its power is low. When the cigarette lighter power is low, the battery pack powers the vehicle-mounted terminal. The voltage range input to the DC power processing module is 9VDC to 36VDC. The DC power processing module converts the DC signal to 12VDC, and then converts the 12VDC signal into various internal voltage signals. To ensure the normal operation of various modules, the camera is connected to the audio and video processing module of the vehicle terminal. There are at least two cameras: one facing the front of the driver's cab to capture real-time road conditions, and the other facing the driver to record the driver's behavior. The remaining cameras are backups used to capture real-time conditions around the tested wheeled vehicle. The audio and video processing module also includes a microphone and a speaker to collect the driver's voice information and transmit voice commands from the backend. The Beidou antenna is connected to the Beidou signal processing module of the vehicle terminal to receive Beidou positioning signals and Beidou clock synchronization signals. The wideband antenna is connected to the wideband antenna signal processing module of the vehicle terminal to transmit and receive wireless signals.

[0060] The SD card storage module is used to temporarily store the collected vehicle OBD data, BeiDou positioning information, BeiDou timing information, audio and video information, and the vehicle terminal's own operation logs when the broadband antenna signal is disconnected. Its memory is greater than or equal to 64GB. When the broadband antenna signal is restored, the temporarily stored information is sent to the host computer processing server through interpolation. The status indicator lights display the status of the vehicle terminal, showing the power supply voltage, positioning data, vehicle terminal equipment malfunctions, OBD data acquisition, and wireless data reception and transmission. The LTE signal processing module is used for wireless signal transmission and processing. The main control module connects to other modules to handle the internal data flow of the vehicle terminal. The peripheral modules include external interfaces such as USB and RJ45 for offline debugging and offline program updates. The host computer processing server is used for remotely issuing voice control commands, reading / storing / calculating all data from the vehicle terminal, displaying the real-time location of the tested vehicle, displaying the driving trajectory of the tested vehicle, and exporting daily reliability driving reports.

[0061] A method for collecting vehicle test data includes the following steps:

[0062] Step 1: Install the camera, wideband antenna, Beidou antenna, and battery pack, and connect them to the vehicle terminal. Connect the vehicle terminal to the OBD module and cigarette lighter of the wheeled vehicle under test. Turn on the power switch of the vehicle terminal and check whether the status indicator lights are normal.

[0063] Step 2: Based on the chassis or engine model of the wheeled vehicle being tested, select the corresponding OBD data processing protocol on the host computer processing server, set the reporting frequency of the vehicle terminal data, set the video encoding format of the vehicle terminal, set the audio encoding format of the vehicle terminal, and send it to the vehicle terminal; the reporting frequency range is 0.1~5Hz, the default value is 1Hz, the default video encoding is H.265, and the default audio encoding is G.729.

[0064] Step 3: Based on the road sections where the tested wheeled vehicle's reliability will be tested, the host computer processing server pre-defines the drivable area, establishes geofences, and sets a system to send an audible alert to the driver via the onboard terminal's audio / video processing module when the tested wheeled vehicle travels outside this area. The host computer processing server records the time and location of the boundary violation and alerts the backend supervisor via flashing text. Based on the specific road sections where the tested wheeled vehicle's reliability will be tested, minimum and maximum speed requirements are defined for those sections. When the tested wheeled vehicle's speed in these sections does not meet the set requirements, an audible alert is sent to the driver, and the host computer processing server records this event. The system monitors the vehicle's speed and location, and alerts the backend supervisor via flashing text. A camera connected to the vehicle terminal captures the driver's actions in real time. When violations occur, such as smoking, making phone calls, or driving while fatigued, an audible alert is sent to the driver, and the host computer records a video screenshot, location, and speed on the server, alerting the backend supervisor via flashing text. Similarly, when the vehicle terminal reads a fault code from the OBD module of the tested wheeled vehicle, an audible alert is sent to the driver, and the host computer records the location and speed information on the server, alerting the backend supervisor via flashing text.

[0065] The criteria for determining if a wheeled vehicle under test has traveled outside the designated area are: if the distance beyond the designated road section area exceeds 10% for 3 seconds, then the wheeled vehicle under test is deemed to have traveled beyond the designated road section area.

[0066] The criteria for determining if a wheeled vehicle exceeds the minimum and maximum speed requirements are: if three consecutive measured speeds exceed the minimum and maximum speed values, and each exceedance lasts for more than 2 seconds, then the wheeled vehicle is determined to be traveling at a speed that does not meet the set requirements on that road segment.

[0067] In step three, all the set requirements can be flexibly configured with their parameters and functions enabled or disabled according to the actual situation.

[0068] Step 4: Start the vehicle. The wheeled vehicle under test begins reliability testing according to the specific test task. The on-board terminal begins to collect and process data in real time through the OBD module, Beidou antenna, camera, audio and video processing module, and wideband antenna, and then transmits the data to the host computer processing server through the wideband antenna.

[0069] Step 5: The host computer processing server saves and records the data information uploaded by the vehicle terminal, and displays the longitude, latitude, height, speed, gear, driver video information, travel time, mileage and other information of the tested wheeled vehicle in real time.

[0070] Step Six: When the daily reliability driving test ends, the host computer processing server generates and exports the daily reliability driving test record report.

[0071] The method for obtaining the vehicle speed Vi data of the wheeled vehicle under test is as follows:

[0072] Vi = (1 + K1 - K2 * K3)Vt + (1 + K2 * K3 - K1)V't, where K3 is the actual receiving frequency of the vehicle terminal for collecting vehicle speed information via Beidou signal; Vt is the vehicle speed read by the vehicle terminal from the bus of the wheeled vehicle under test via the ODB module; and V't is the vehicle speed obtained by the vehicle terminal via Beidou signal.

[0073] Where Xi is the cumulative difference in vehicle speed sampled by the ODB module during the i-th data upload period, and ΔX is the set value of the cumulative difference in vehicle speed sampled by the ODB module; V i,j Let m be the vehicle speed sampled by the ODB module in the i-th data upload cycle, m be the number of vehicle speed samples taken in one ODB module data upload cycle, ΔV be the set value of the vehicle speed sampled by the ODB module, and u1 and w1 be fixed weighting coefficients.

[0074]

[0075] Where Yi is the cumulative difference in vehicle speed sampled by the BeiDou signal during the i-th data upload cycle, and ΔY is the set value of the cumulative difference in vehicle speed sampled by the BeiDou signal; V' i,j Let be the vehicle speed sampled in the j-th sampling period of the BeiDou signal, n be the number of sampling vehicle speeds in one BeiDou signal data upload period, ΔV' be the set value of the BeiDou signal sampling vehicle speed; u2 and w2 are fixed weighting coefficients;

[0076] The vehicle speed calculation formula provided by this invention can eliminate the error in vehicle speed acquisition by Beidou signal and ODB module. When the error in vehicle speed acquisition by Beidou signal or ODB module is large, the weight ratio of vehicle speed acquisition by Beidou signal or ODB module can be eliminated, while the weight ratio of the other can be increased, thereby improving the accuracy of vehicle speed acquisition.

[0077] Meanwhile, when the BeiDou signal is normal and strong, the weight of the vehicle speed obtained from BeiDou positioning is increased, and the actual vehicle speed is sent to the host computer processing server; when the BeiDou signal is weak, the weight of BeiDou signal speed measurement is reduced, and the weight of vehicle speed read by the ODB module is increased, and the actual vehicle speed is sent to the host computer processing server, thus avoiding the technical problem of large vehicle speed errors caused by unstable BeiDou signals.

[0078] The acquisition of the total mileage data of the tested wheeled vehicle is as follows: the host computer processing server integrates the vehicle speed over time according to the set reporting frequency of the on-board terminal data and the reported speed of the tested wheeled vehicle to obtain the total mileage of the tested wheeled vehicle.

[0079] The total mileage of the tested wheeled vehicles includes the sum of mileage traveled on different types of test surfaces. These different surface types include: highways, off-road surfaces, lightly reinforced surfaces, heavily reinforced surfaces, uneven surfaces, cobblestone surfaces, pothole surfaces, bumpy surfaces, twisting surfaces, Belgian surfaces, and other common test surfaces.

[0080] The method for obtaining the average speed data of the wheeled vehicle under test on a certain test road surface type is as follows: divide the mileage of the test road surface type by the travel time on that road surface to obtain the average speed on that road surface; divide the test road surface into different positioning coordinates for calibration and identification; when the host computer processing server reads the positioning data of the wheeled vehicle under test on a certain type of test road surface, it starts to calculate the mileage and travel time of this road segment.

[0081] The host computer server generates and exports daily reliability driving data reports. The report content includes: road surface type, start time, stop time, driving time, mileage on the road surface, total mileage, average speed, fuel amount, driver information, alarm information, weather conditions, and fault conditions.

[0082] The host computer processing server stores all data throughout the entire reliable driving process, including but not limited to the fault codes, positioning information, gear information, engine speed, total mileage, mileage on a single type of road surface, driving trajectory, tire pressure, and driving time on a single type of road surface of the tested wheeled vehicle.

[0083] The method for determining the start of driving is as follows: when the real-time speed Vt of the tested wheeled vehicle is ≥ 5 km / h and the duration is greater than 5 seconds, the tested wheeled vehicle is considered to have started driving; this moment is the start of driving. The method for determining the stop of driving is as follows: when the parking flag bit in the OBD data of the tested wheeled vehicle is read as 1, the tested wheeled vehicle is considered to have stopped driving; this moment is the stop of driving. The fuel level, driver information, weather conditions, and other information are manually entered by the back-end supervisor. The sources of the fault conditions include fault codes read by the on-board terminal through the OBD interface of the tested wheeled vehicle, as well as some faults on the chassis, frame, and other exterior parts of the tested wheeled vehicle that are visually observed by the tester.

[0084] Specifically, the method for obtaining the mileage data of the tested wheeled vehicle is as follows: The host computer processing server calculates the mileage for each reported data transmission frequency (f) and the reported speed (Vi) of the tested wheeled vehicle, based on the set data transmission frequency f of the onboard terminal. This mileage is then accumulated over time to obtain the total mileage. According to the characteristics of the road sections, the test road sections are divided into different test surface types, including: highways, off-road surfaces, light-duty reinforced surfaces, heavy-duty reinforced surfaces, uneven surfaces, cobblestone roads, pothole roads, bumpy roads, twisting roads, and Belgian roads. The total mileage of the tested wheeled vehicle is the sum of the mileage across all test surface types, as shown in the following formula:

[0085] The mileage di' for each reported vehicle speed is:

[0086] di' = Vi * (1 / f), where 1 / f is the signal upload period of the vehicle terminal;

[0087] The distance Di′ traveled on the i-th road surface is:

[0088] p represents the number of upload cycles required to travel on this road surface;

[0089] In this reliability driving test, the total driving mileage D is:

[0090] q represents the number of different road surface types in the test.

[0091] Different positioning coordinates are divided on the test road surface for calibration and identification. When the host computer processing server reads the positioning data of the wheeled vehicle under test and finds that it is on a certain type of test road surface, it starts to calculate the mileage and travel time Ti′ of this road segment. The calculation formula is as follows:

[0092] Ti′=∑(t f -t n )

[0093] Wherein, the start time t n The determination method is as follows: when the real-time speed Vt of the tested wheeled vehicle is ≥ 5 km / h and the duration is greater than 5 seconds, the tested wheeled vehicle is determined to have started moving, and this time is called the start time t. n ;

[0094] Stopping time t f The determination method is as follows: when the parking flag bit in the OBD data of the tested wheeled vehicle is read to be 1, it is determined that the tested wheeled vehicle has stopped moving. This time is the time t when it stops moving. f ;

[0095] The timing in the calculation process all comes from the BeiDou clock timing signal.

[0096] The method for obtaining the average speed data of the tested wheeled vehicle on a certain test road surface type is as follows: divide the distance traveled on that test road surface type by the travel time on that road surface to obtain the average speed on that road surface.

[0097]

[0098] As described above, this invention can automatically collect and calculate data such as mileage, driving time, location, and gear position during reliability driving tests. This avoids potential recording and calculation errors that may occur with manual recording and calculation, improving data accuracy, testing efficiency, and data reliability to support multi-dimensional reliability analysis. In reliability driving tests, by using the vehicle's location data to define geofences and driving speeds on different road surfaces, and through camera monitoring, it is possible to effectively prevent drivers from engaging in illegal driving or operational behaviors during reliability driving tests, avoiding driving on unauthorized roads and improving the accuracy of reliability driving tests. Through the vehicle test data acquisition system and method of this invention, in reliability driving tests, it can provide effective data support for fault prediction, fault source identification, fault troubleshooting, fault repair, and structural upgrades, thereby accelerating the development of wheeled vehicles.

[0099] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vehicle test data acquisition system, characterized in that, include: The vehicle-mounted terminal includes a CAN bus / K bus / LIN bus data processing module, status indicator lights, audio and video processing module, SD card storage module, main control module, Beidou signal processing module, DC power supply processing module, LTE signal processing module, wideband antenna signal processing module, and peripheral modules. The CAN bus / K bus / LIN bus data processing module is connected to the OBD module of the wheeled vehicle under test and is used to collect bus data of the wheeled vehicle under test. A camera, which is connected to an audio / video processing module; The Beidou antenna, which is connected to the Beidou signal processing module, is used to receive Beidou positioning signals and Beidou clock timing signals. The battery pack is connected to the DC power processing module; The wideband antenna, connected to the wideband antenna signal processing module, is used to transmit and receive wireless signals and transmit the data collected by the vehicle terminal to the host computer processing server.

2. The vehicle test data acquisition system according to claim 1, characterized in that, The DC power processing module is also connected to the cigarette lighter of the wheeled vehicle under test. The cigarette lighter supplies power to the vehicle terminal and charges the battery pack through the DC power processing module. When the cigarette lighter's power is insufficient or the power is cut off, the battery pack supplies power to the vehicle terminal. The voltage range from 9VDC to 36VDC is supplied by the cigarette lighter to the DC power processing module. The DC power processing module converts the DC signal into 12VDC to power the internal modules and battery pack of the vehicle terminal.

3. The automotive test data acquisition system according to claim 2, characterized in that, The system is equipped with multiple cameras, one of which faces the front of the driver's cab to capture real-time road conditions, another camera faces the driver to record the driver's behavior, and the remaining cameras are for backup to capture real-time conditions around the wheeled vehicle under test. The audio and video processing module also includes a microphone and a speaker to collect the driver's voice information and transmit voice commands to the backend.

4. The automotive test data acquisition system according to claim 3, characterized in that, When the wideband antenna signal is disconnected, the OBD data, BeiDou positioning information, BeiDou timing information, audio and video information, and the vehicle terminal's own operation log information of the tested wheeled vehicle are temporarily stored in the SD card storage module. The memory of the SD card storage module is not less than 64GB. When the wideband antenna signal is restored, the temporarily stored information is sent to the host computer processing server through interpolation. Status indicator lights are used to display the status of the vehicle terminal, including the status of various power supply voltages, positioning data, vehicle terminal equipment failure status, OBD data acquisition status, and wireless data reception and transmission status; the LTE signal processing module is used for wireless signal transmission and processing; the main control module is connected to other modules in the vehicle terminal and is used to process the internal data flow of the vehicle terminal; the peripheral module includes external interfaces for offline debugging and offline program update burning; The host computer processing server is used for remotely issuing voice control commands, reading / storing / calculating all data from the vehicle terminal, displaying the real-time location of the vehicle under test, displaying the driving trajectory of the vehicle under test, and exporting daily reliability driving reports.

5. The data acquisition method of an automotive test data acquisition system according to claim 1, characterized in that, Includes the following steps: Step 1: Install the camera, wideband antenna, Beidou antenna, and battery pack, and connect them to the vehicle terminal. Connect the vehicle terminal to the OBD module and cigarette lighter of the wheeled vehicle under test. Turn on the power switch of the vehicle terminal and check whether the status indicator lights are normal. Step 2: Based on the chassis model or engine model of the wheeled vehicle being tested, select the corresponding OBD data processing protocol on the host computer processing server, set the reporting frequency of the vehicle terminal data, set the video encoding format of the vehicle terminal, set the audio encoding format of the vehicle terminal, and send it to the vehicle terminal. Step 3: Based on the road sections where the tested wheeled vehicle will travel reliably, the operating area and geofence are pre-defined on the host computer processing server. When the tested wheeled vehicle travels outside this area, an audio / video prompt is sent to the driver via the onboard terminal's audio / video processing module. The host computer processing server records the time and location of the boundary violation and alerts the backend supervisor via flashing text. Based on the specific road sections the tested wheeled vehicle will travel on, minimum and maximum speed limits are set for those sections. When the tested wheeled vehicle's speed on a section does not meet the set requirements, an audio prompt is sent to the driver, and the host computer processing server records the current speed and location, alerting the backend supervisor via flashing text. The system uses cameras to identify driver behavior in real time. When a driver violates the rules, an audio prompt is sent to the driver, and the system records the video screenshot, location, and vehicle speed information on the host computer processing server. The system also sends a text message to the backend supervisor when the on-board terminal reads a fault code from the OBD module of the wheeled vehicle being tested. The system also records the location and vehicle speed information on the host computer processing server and sends a text message to the backend supervisor when the system reads the fault code. Step 4: During the reliability driving process of the wheeled vehicle under test according to the specific test task, the on-board terminal collects and processes test data in real time through the OBD module, Beidou antenna, camera, audio and video processing module, and wideband antenna, and sends the data to the host computer processing server in real time through the wideband antenna. Step 5: The host computer processing server saves and records the data information uploaded by the vehicle terminal, and displays the longitude, latitude, height, speed, gear, driver video information, driving time, and mileage of the tested wheeled vehicle in real time. Step 6: When the daily reliability driving test ends, the host computer processing server generates and exports the daily reliability driving test record report.

6. The method for acquiring automotive test data according to claim 5, characterized in that, The host computer server generates and exports daily reliability driving data reports. The report content includes: road surface type, start time, stop time, driving time, mileage on the road surface, total mileage, average speed, fuel amount, driver information, alarm information, weather conditions, and fault conditions. The host computer processing server stores all data from the entire reliability test driving process, including but not limited to the fault codes, location information, gear information, engine speed, total mileage, mileage on a single type of road surface, driving trajectory, tire pressure, and driving time on a single type of road surface of the tested wheeled vehicle. The fuel amount, driver information, and weather information are manually entered daily by the back-end supervisor. The sources of fault information include fault codes read by the on-board terminal through the OBD interface of the tested wheeled vehicle, as well as fault information on the chassis, frame appearance, and on-board facilities of the tested wheeled vehicle that the tester visually observes.

7. The method for acquiring automotive test data according to claim 5, characterized in that, The method for obtaining the vehicle speed Vi data of the wheeled vehicle under test is as follows: Vi = (1 + K1 - K2 * K3)Vt + (1 + K2 * K3 - K1)V't, where K3 is the vehicle-mounted terminal. The actual receiving frequency of the vehicle speed information collected by the terminal through the Beidou signal; Vt is the vehicle speed read by the vehicle terminal through the ODB module in the bus of the wheeled vehicle under test, and V't is the vehicle speed obtained by the vehicle terminal through the Beidou signal. Where Xi is the cumulative difference in vehicle speed sampled by the ODB module during the i-th data upload period, and ΔX is the set value of the cumulative difference in vehicle speed sampled by the ODB module; V i,j Let m be the vehicle speed sampled by the ODB module in the i-th data upload cycle, m be the number of vehicle speed samples taken in one ODB module data upload cycle, ΔV be the set value of the vehicle speed sampled by the ODB module, and u1 and w1 be fixed weighting coefficients. Where Yi is the cumulative difference in vehicle speed sampled by the BeiDou signal during the i-th data upload cycle, and ΔY is the set value of the cumulative difference in vehicle speed sampled by the BeiDou signal; V′ i,j Let be the vehicle speed sampled in the j-th sampling period of the BeiDou signal, n be the number of sampling vehicle speeds in one BeiDou signal data upload period, ΔV' be the set value of the BeiDou signal sampling vehicle speed; u2 and w2 are fixed weighting coefficients; 8. The method for acquiring automotive test data according to claim 7, characterized in that, The method for obtaining the mileage data of the wheeled vehicle under test is as follows: the host computer processing server calculates the mileage once for each report when the wheeled vehicle under test is in motion, based on the set reporting frequency f of the vehicle terminal data and the reported vehicle speed Vi of the wheeled vehicle under test. Then, the time is accumulated to obtain the mileage of the wheeled vehicle under test. Based on the characteristics of the road sections, the test sections are divided into different test road surface types, including: highway, off-road, light reinforced road, heavy reinforced road, uneven road, cobblestone road, pothole road, bumpy road, twisting road, and Belgian road. The total mileage of the tested wheeled vehicles is the sum of the mileage in all different test road surface types, as shown in the following formula: The mileage di' for each reported vehicle speed is: di' = Vi * (1 / f), where 1 / f is the signal upload period of the vehicle terminal; The distance Di′ traveled on the i-th road surface is: p represents the number of upload cycles required to travel on this road surface; In this reliability driving test, the total driving mileage D is: q represents the number of different road surface types in the test.

9. A method for acquiring automotive test data according to claim 8, characterized in that, Different positioning coordinates are divided on the test road surface for calibration and identification. When the host computer processing server reads the positioning data of the wheeled vehicle under test and finds that it is on a certain type of test road surface, it starts to calculate the mileage and travel time Ti′ on this road surface. The calculation formula is as follows: Ti′=∑(t f -t n ) Wherein, the start time t n The judgment method is as follows: when the real-time speed V of the wheeled vehicle being tested... i When the speed reaches ≥5km / h and the duration is greater than 5 seconds, the tested wheeled vehicle is considered to have started moving. This moment is called the start time t. n ; Stopping time t f The determination method is as follows: when the parking flag bit in the OBD data of the tested wheeled vehicle is read to be 1, it is determined that the tested wheeled vehicle has stopped moving. This time is the time t when it stops moving. f ; The timing in the calculation process all comes from the BeiDou clock timing signal.

10. A method for acquiring automotive test data according to claim 9, characterized in that, The method for obtaining the average speed data of the tested wheeled vehicle on a certain test road surface type is as follows: divide the distance traveled on that test road surface type by the travel time on that road surface to obtain the average speed on that road surface.

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