Vehicle-mounted evaluation system based on Beidou differential positioning technology

Abstract

The invention belongs to the technical field of vehicle-mounted judgment, and discloses a vehicle-mounted judgment system based on a Beidou differential positioning technology. The vehicle-mounted evaluation system comprises a positioning base station, a vehicle-mounted module, a site deployment and control module and a vehicle-mounted evaluation management module. The positioning base station collects a Beidou satellite carrier phase observation value and transmits a base station coordinate to provide a precise positioning reference for the vehicle-mounted module; the vehicle-mounted module determines the position and operation information of a vehicle, acquires audio and video in the vehicle and a user identifier, and plays and displays examination information; the site deploying and controlling module acquires full-subject site images and transmits vehicle running conditions; and the vehicle-mounted evaluation management module integrates the data to obtain an evaluation result. Manual and single sensor judgment is replaced, the problems that a traditional system is difficult in accurate positioning, insufficient in monitoring and the like are solved, site cost is reduced, and assessment accuracy, fairness and traceability are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted evaluation technology, and in particular to a vehicle-mounted evaluation system based on BeiDou differential positioning technology. Background Technology

[0002] Currently, traditional assessment methods for motor vehicle driver's license examinations rely heavily on manual operation, which has drawbacks such as a high risk of misjudgment and susceptibility to interference from personal relationships, posing hidden dangers to the qualification certification of drivers in the transportation industry. Some systems that attempt to achieve automatic assessment require the installation of a large number of ultrasonic, magnetoresistive, and photoelectric sensors in each subject's examination site. This not only leads to large investment in site construction and long construction periods, but also faces the problem of high infrastructure and subsequent maintenance costs. Furthermore, such systems have difficulty accurately obtaining the location and driving operation information of the target vehicle, and cannot efficiently integrate the audio and video data inside the target vehicle, user identification information, and the operating status of the target vehicle in each subject's examination site for comprehensive assessment and analysis. Consequently, they cannot guarantee the accuracy and fairness of the assessment results, and cannot meet the needs of intelligent and precise driver's license assessment. Summary of the Invention

[0003] This application provides an in-vehicle evaluation system based on BeiDou differential positioning technology, which can improve the accuracy, fairness and traceability of the evaluation results, and provide an intelligent and efficient solution for the evaluation of motor vehicle drivers.

[0004] In the first aspect, this application provides a vehicle-mounted evaluation system based on BeiDou differential positioning technology. The vehicle-mounted evaluation training system includes a positioning base station, a vehicle-mounted module, a site deployment module, and a vehicle-mounted evaluation management module. The positioning base station is used to collect BeiDou satellite carrier phase observation values ​​and to send the BeiDou satellite carrier phase observation values ​​and the base station coordinate information of the positioning base station to the vehicle module. The vehicle-mounted module is used to determine the location information and driving operation information of the target vehicle based on the Beidou satellite carrier phase observation value and the base station coordinate information of the positioning base station; collect audio and video data and user identification information inside the target vehicle, and send the audio and video data and user identification information inside the target vehicle to the vehicle-mounted evaluation and management module; and play and display examination information. The site control module is used to acquire images of the examination sites for each subject, obtain the operating status of the target vehicle in the examination sites for each subject, and transmit the operating status of the target vehicle in the examination sites for each subject to the vehicle evaluation and management module. The vehicle-mounted evaluation and management module is used to perform assessment and analysis based on the location information and driving operation information of the target vehicle, the audio and video data and user identification information inside the target vehicle, and the operation status of the target vehicle in the examination sites of each subject, and to obtain the assessment and evaluation results.

[0005] Optionally, the positioning base station includes a BeiDou signal receiver, a BeiDou antenna, a wireless data transmission device, a power supply device, and a lightning protection device; the positioning base station continuously tracks BeiDou satellites through the BeiDou signal receiver and the BeiDou antenna to collect BeiDou satellite carrier phase observation values, and transmits the BeiDou satellite carrier phase observation values ​​and base station coordinate information to the vehicle-mounted module wirelessly through the wireless data transmission device; and the lightning protection device provides lightning protection, and the power supply device ensures long-term stable operation.

[0006] Optionally, the vehicle-mounted module includes a Beidou vehicle-mounted mobile station, a Beidou positioning antenna, a vehicle-mounted signal sensor, an identity collection device, a vehicle-mounted camera, a vehicle-mounted speaker, and a vehicle-mounted display terminal. The Beidou positioning antenna is communicatively connected to the Beidou vehicle-mounted mobile station to collect Beidou satellite signals. The Beidou vehicle-mounted mobile station uses RTK technology to perform differential calculations on the Beidou satellite signals and the Beidou satellite carrier phase observation values ​​and base station coordinate information sent by the positioning base station, and outputs the location information of the target vehicle. The vehicle-mounted signal sensor is connected to the vehicle-mounted display terminal via a CAN bus to collect the engine status, gear position, headlight status, handbrake status, seat belt status, clutch status, and brake status of the target vehicle as the driving operation information. The identity collection device includes a fingerprint collection module, a face collection module, and a second-generation ID card reading module for collecting user identification information. The vehicle-mounted camera is used to collect audio and video data inside the target vehicle. The vehicle-mounted speaker is used to play assessment prompts and guidance content, and the vehicle-mounted display terminal is used to display the examination information.

[0007] Optionally, the site control module includes a full-subject monitoring submodule and a site network submodule. The full-subject monitoring submodule deploys monitoring cameras in the assessment areas for reversing and shifting, U-turns on highways, right-angle turns, navigating S-shaped roads, navigating single-sided bridges, double-sided bridges, hill start and stop, circular obstacle courses, parallel parking, comprehensive driving skills, positioning and parking, passing through restricted gates, and narrow alleys, as well as in the assessment areas for forklift S-shaped obstacle courses, forklift loading and unloading, forklift hill start, forklift I-beam operation, and forklift right-angle turns, to collect the operating status of the target vehicles. The site network submodule establishes a dedicated network to ensure real-time data transmission between the operating status collected by the full-subject monitoring submodule and the vehicle-mounted evaluation and management module.

[0008] Optionally, the vehicle-mounted evaluation management module includes a three-dimensional simulation sub-module; the three-dimensional simulation sub-module, based on a preset three-dimensional electronic map of the examination site and a three-dimensional model of the target vehicle, combined with the location information of the target vehicle, displays the running trajectory and spatial posture of the target vehicle in the examination site in real time.

[0009] Optionally, the vehicle-mounted assessment management module includes an automatic assessment submodule; the automatic assessment submodule pre-stores the violation judgment standards for each assessment subject, and identifies whether the target vehicle has violated regulations such as crossing the line, deviating from the assessment route, or speeding based on the target vehicle's location information, driving operation information, and operation status in the examination site of each subject, and automatically generates the corresponding deduction results according to the violation judgment standards to determine the assessment judgment result.

[0010] Optionally, the vehicle-mounted assessment management module includes an identity verification submodule; the identity verification submodule compares the facial information and fingerprint information in the user identification information collected by the identity collection device with the pre-stored candidate basic information, and only allows the target vehicle to start the assessment process when the facial information and fingerprint information match the pre-stored candidate basic information; if the comparison does not match, the identity verification failure prompt is output through the vehicle-mounted display terminal.

[0011] Optionally, the vehicle-mounted evaluation management module includes an audio and video storage submodule; the audio and video storage submodule receives and stores the audio and video data inside the target vehicle collected by the vehicle-mounted camera and the audio and video data of the target vehicle operation collected by the site deployment module, and supports playback and query of the stored audio and video data when there is any objection to the evaluation results or when abnormal situations occur.

[0012] Optionally, the vehicle-mounted assessment management module also includes a basic information management sub-module; the basic information management sub-module is used to input, modify, query and delete candidate personal information, coach information, test site information, target vehicle information, assessment subject information and assessment schedule.

[0013] Optionally, the examination information displayed on the vehicle-mounted display terminal includes the examinee's name, ID number, current examination subject name, examination session, total score of the examination subject, deducted points, remaining points, and a description of the violation deduction items. The examination information is synchronized to the vehicle-mounted evaluation management module in real time.

[0014] As can be seen from the above technical solution, this application has the following beneficial effects compared with the prior art: This vehicle-mounted assessment and training system, by setting up positioning base stations, can collect BeiDou satellite carrier phase observations and send them along with base station coordinate information to the vehicle-mounted module. This provides reliable benchmark data for the vehicle-mounted module to accurately determine the target vehicle's location and driving information, effectively solving the problem of traditional systems struggling to obtain accurate vehicle location and driving information. The vehicle-mounted module can determine the target vehicle's location and driving information based on data from the positioning base stations, collect and upload audio and video data and user identification information from within the target vehicle, and also play and display exam information. This ensures the comprehensiveness of key data during the assessment process and improves the interactivity between the examinee and the system. The site deployment module... It can capture images of the test sites for each subject and transmit the operating status of the target vehicles, achieving blind-spot-free monitoring of the test sites and making up for the shortcomings of insufficient coverage in traditional site monitoring. The vehicle-mounted evaluation and management module can comprehensively analyze the target vehicle's location information, driving operation information, in-vehicle audio and video data, user identification information, and the vehicle's operating status in the site to obtain the evaluation results. It completely replaces the manual evaluation and single sensor evaluation mode, effectively avoiding misjudgment and interference from human factors, significantly reducing the site construction and maintenance costs, and improving the accuracy, fairness, and traceability of the evaluation results. It provides an intelligent and efficient solution for motor vehicle driver assessment.

[0015] The further effects of the aforementioned non-conventional preferred method will be explained below in conjunction with specific embodiments. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this application or the existing technical solutions, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall framework of an in-vehicle evaluation system provided in this application; Figure 2 A schematic diagram of a vehicle-mounted module provided in this application; Figure 3 A schematic diagram of an in-vehicle evaluation and management module provided in this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The various non-limiting embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0020] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the vehicle-mounted evaluation system based on BeiDou differential positioning technology of this application. It should be noted that in this embodiment, "vehicle-mounted module" refers to "vehicle-mounted hardware," "site deployment module" refers to "site deployment," and "vehicle-mounted evaluation management module" refers to "vehicle-mounted evaluation management software." "Target vehicle" can be understood as "examination vehicle," and "user identification information" can be understood as "fingerprint information, facial information, and second-generation ID card information" used to verify the examinee's identity. The essential functions of each feature are consistent; only the terminology differs slightly.

[0021] The core of this application is to achieve high-precision positioning, full-process monitoring, and automated evaluation of motor vehicle driver assessment through the collaborative work of positioning base stations, vehicle-mounted modules, site deployment modules, and vehicle-mounted evaluation management modules. This solves the problems of high error rates in traditional manual evaluation and high infrastructure costs in traditional automatic evaluation systems. As shown in Figure 1 (overall architecture diagram of the vehicle-mounted evaluation training system), the various modules of the system interact with each other through the site network sub-module, forming a complete closed loop of "data acquisition - transmission - analysis - evaluation". The specific implementation details of each module are described below.

[0022] In this embodiment, the vehicle-mounted evaluation and training system includes a positioning base station, a vehicle-mounted module, a site deployment module, and a vehicle-mounted evaluation and management module. The positioning base station includes a BeiDou signal receiver, a BeiDou antenna, a wireless data transmission device, a power supply device, and a lightning protection device. The positioning base station continuously tracks BeiDou satellites using the BeiDou signal receiver and BeiDou antenna to collect BeiDou satellite carrier phase observations, and transmits the BeiDou satellite carrier phase observations and base station coordinate information wirelessly to the vehicle-mounted module via the wireless data transmission device. Furthermore, the lightning protection device provides lightning protection, and the power supply device ensures long-term stable operation.

[0023] The positioning base station is used to collect BeiDou satellite carrier phase observation values ​​and to send the BeiDou satellite carrier phase observation values ​​and the base station coordinate information to the vehicle-mounted module. The positioning base station is fundamental to achieving high-precision positioning of the target vehicle, and its deployment and operation must meet the requirements of "long-term stability and accurate data transmission," as specifically implemented below: Deployment location selection: Select a known and accurate ground coordinate point (this coordinate point needs to be determined in advance through professional surveying and mapping, and must meet the conditions for receiving BeiDou satellite signals, with no tall buildings, trees or other obstructions) to ensure that the base station can continuously track BeiDou satellite signals.

[0024] Hardware Composition and Function Implementation: As shown in Figure 1, the positioning base station includes a BeiDou signal receiver, a BeiDou antenna, wireless data transmission equipment, power supply equipment, and lightning protection equipment. The BeiDou antenna is connected to the BeiDou signal receiver and is used for long-term continuous tracking of BeiDou satellites, collecting real-time BeiDou satellite carrier phase observations (i.e., carrier phase data between the satellite and the base station, which is the core data for differential positioning). The wireless data transmission equipment (using an industrial-grade wireless data transmission radio) communicates with the BeiDou signal receiver, transmitting the collected BeiDou satellite carrier phase observations and the base station's own known precise coordinate information (base station coordinate information) wirelessly (using the UHF band, which is less susceptible to interference) to the BeiDou vehicle-mounted mobile station in the vehicle module. The power supply equipment adopts a dual-backup design of "mains power + solar panels" to ensure the base station can still operate normally in the event of a power outage. Lightning protection equipment (including lightning rods and lightning protection grounding devices) is installed around the base station to prevent lightning strikes from damaging the equipment during thunderstorms and to ensure the long-term stable operation of the base station.

[0025] It should be noted that the differential data transmitted by the positioning base station must meet real-time requirements, with a data update frequency of no less than 1Hz, to ensure that the vehicle module can receive and use it for positioning calculation in a timely manner. The "differential positioning technology" involved here refers to correcting the satellite signal error received by the vehicle module using the reference data provided by the base station. The "RTK technology" (real-time dynamic differential technology) used in the subsequent vehicle module is a type of differential positioning technology, which can achieve centimeter-level positioning accuracy and ensure the accuracy of the target vehicle's location information.

[0026] The vehicle-mounted module is used to determine the location and driving information of the target vehicle based on the BeiDou satellite carrier phase observation value and the base station coordinate information of the positioning base station; collect audio and video data and user identification information inside the target vehicle, and send the audio and video data and user identification information inside the target vehicle to the vehicle-mounted evaluation and management module; and play and display examination information. The vehicle-mounted module includes a BeiDou vehicle-mounted mobile station, a BeiDou positioning antenna, a vehicle-mounted signal sensor, an identity acquisition device, a vehicle-mounted camera, a vehicle-mounted speaker, and a vehicle-mounted display terminal. The BeiDou positioning antenna is communicatively connected to the BeiDou vehicle-mounted mobile station to collect BeiDou satellite signals. The BeiDou vehicle-mounted mobile station uses RTK technology to perform differential calculations on the BeiDou satellite signals and the BeiDou satellite carrier phase observation values ​​and base station coordinate information sent by the positioning base station, outputting the location information of the target vehicle. The vehicle-mounted signal sensor is connected to the vehicle-mounted display terminal via a CAN bus to collect the engine status, gear position, headlight status, handbrake status, seat belt status, clutch status, and brake status of the target vehicle as driving operation information. The identity acquisition device includes a fingerprint acquisition module, a face acquisition module, and a second-generation ID card reading module for collecting user identification information. The vehicle-mounted camera is used to collect audio and video data inside the target vehicle. The vehicle-mounted speaker is used to play assessment prompts and guidance content, and the vehicle-mounted display terminal is used to display the examination information.

[0027] The examination information displayed on the vehicle-mounted display terminal includes the examinee's name, ID number, current examination subject name, examination session, total score of the examination subject, deducted points, remaining points, and a description of the violation deduction items. The examination information is synchronized to the vehicle-mounted evaluation management module in real time.

[0028] The vehicle-mounted module is installed on the target vehicle and undertakes three major functions: "location calculation, data collection, and candidate interaction." It is the core carrier connecting the positioning base station and the vehicle-mounted evaluation and management module. Its hardware composition and functional implementation are shown in Figure 2, and the specific implementation is as follows: Hardware Composition and Connections: The vehicle-mounted module includes a Beidou vehicle-mounted mobile station, a Beidou positioning antenna, a vehicle-mounted signal sensor, an identity collection device, a vehicle-mounted camera, a vehicle-mounted speaker, and a vehicle-mounted display terminal. These components are connected via wired or wireless means: the Beidou positioning antenna communicates with the Beidou vehicle-mounted mobile station via an RF cable; the vehicle-mounted signal sensor connects to the vehicle-mounted display terminal via a CAN bus (Controller Area Network bus, a dedicated bus for data transmission between vehicle electronic devices, characterized by strong anti-interference capabilities and high transmission rates); the identity collection device, vehicle-mounted camera, and vehicle-mounted speaker are all directly connected to the vehicle-mounted display terminal via USB or HDMI interfaces to ensure real-time data transmission.

[0029] The implementation methods of each component are described below: Positioning and calculation function: The Beidou positioning antenna collects Beidou satellite signals in real time and transmits the signals to the Beidou vehicle-mounted mobile station; the Beidou vehicle-mounted mobile station receives the Beidou satellite carrier phase observation value and base station coordinate information sent by the positioning base station through a wireless communication antenna (integrated on the target vehicle and matched with the wireless data transmission equipment of the positioning base station), and performs differential calculation on the above two types of data using RTK technology, and finally outputs the target vehicle position information with centimeter-level accuracy (including the target vehicle's longitude, latitude, altitude, driving speed and driving direction), which is transmitted to the vehicle display terminal and vehicle evaluation and management module in real time.

[0030] Driving operation information collection function: The vehicle signal sensors include engine status sensor, gear position sensor, headlight status sensor (covering various headlights such as turn signals, brake lights, and low beam headlights), handbrake sensor, seat belt sensor, clutch sensor, and brake sensor. Each sensor directly collects real raw signals during the operation of the target vehicle (such as whether the engine is started, whether the gear is in neutral, whether the handbrake is engaged, and whether the seat belt is fastened), and transmits them in real time to the vehicle display terminal via the CAN bus to form "driving operation information", providing a basis for vehicle status for subsequent automatic evaluation.

[0031] User identification information collection function: The identity collection device includes a fingerprint collection module (using an optical fingerprint sensor to collect the candidate's fingerprint image), a face collection module (integrated in the vehicle-mounted camera to capture the candidate's facial image), and a second-generation ID card reading module (reading the chip information in the second-generation ID card through NFC technology). Before the assessment, candidates must complete "second-generation ID card reading → fingerprint collection → face shooting" in sequence. The three types of information together constitute "user identification information" and are transmitted to the vehicle-mounted assessment and management module for identity verification.

[0032] Audio and video data acquisition function: The vehicle-mounted camera (using a high-definition wide-angle camera, installed directly in front of the driver's seat of the target vehicle) collects audio and video data inside the target vehicle in real time (including the examinee's operating actions, such as whether both hands are off the steering wheel, whether the examinee looks down at the gear shift, and the sounds inside the vehicle, such as whether there are prompts from others). This data is transmitted to the vehicle-mounted display terminal in real time and simultaneously uploaded to the vehicle-mounted evaluation management module for recording the assessment process and tracing anomalies.

[0033] Candidate interaction functions: The in-vehicle speaker (installed near the dashboard of the target vehicle) is used to play assessment prompts and guidance content (such as "We are about to enter the right-angle turn subject, please slow down" and "Not wearing a seat belt, 100 points deducted"); the in-vehicle display terminal (using a 10-inch touch screen, installed on the center console of the target vehicle) is used to display "examination information", which specifically includes the candidate's name, ID number, current assessment subject name, assessment session, total score of the assessment subject (such as 100 points), points deducted, remaining points, and explanations of violation deduction items (such as "crossing the line, 100 points deducted"). This examination information is synchronized in real time to the in-vehicle evaluation management module through the site network sub-module to ensure consistency between the candidate and system information.

[0034] The site control module is used to acquire images of the examination sites for each subject, obtain the operating status of the target vehicle in each subject's examination site, and transmit the operating status of the target vehicle in each subject's examination site to the vehicle-mounted evaluation and management module. The site control module includes a full-subject monitoring submodule and a site network submodule. The full-subject monitoring submodule deploys monitoring cameras in the assessment areas for reversing and shifting, U-turns, right-angle turns, navigating S-shaped roads, navigating single-sided bridges, double-sided bridges, hill start and stop, circular obstacle courses, parallel parking, comprehensive driving skills, positioning and parking, passing through restricted gates, and narrow alleyways, as well as in the assessment areas for forklift S-shaped obstacle courses, forklift loading and unloading, forklift hill start, forklift I-beam operation, and forklift right-angle turns, to collect the operating status of the target vehicle. The site network submodule establishes a dedicated network to ensure real-time data transmission between the operating status collected by the full-subject monitoring submodule and the vehicle-mounted evaluation and management module.

[0035] The site control module is used to achieve "full-area monitoring and full data transmission" of the assessment site, providing site-level assessment data for the vehicle-mounted evaluation management module. The specific implementation is as follows: Module Composition and Deployment: As shown in Figure 1, the site control module includes a full-subject monitoring submodule and a site network submodule. The full-subject monitoring submodule must cover all assessment areas: high-definition PTZ cameras (at least one per area, ensuring no blind spots) must be deployed in the following areas: reversing and shifting, U-turns, right-angle turns, navigating S-shaped roads, crossing single-sided bridges, double-sided bridges, hill starts and stops, circular obstacle courses, parallel parking, comprehensive driving skills, positioning and parking, passing through restricted gates, and narrow alleyways for both large and small vehicles; and forklift S-shaped obstacle courses, forklift loading and unloading, forklift hill starts, forklift I-beam operations, and forklift right-angle turns. Cameras must be installed at a height of at least 5 meters to avoid obstruction by target vehicles. The site network submodule uses a hybrid "fiber optic + wireless AP" network. Fiber optic cables connect the site monitoring cameras to the server in the server room, while wireless APs cover the entire assessment area for data transmission between the vehicle-mounted modules and the server, ensuring that all data transmission latency does not exceed 0.5 seconds to meet real-time evaluation requirements.

[0036] It should be noted that the cameras in the full-subject monitoring submodule collect real-time data on the operation of the target vehicle in each subject's examination area (including whether the target vehicle crosses the line, deviates from the assessment route, and exceeds the speed limit), and transmit the collected image data to the vehicle-mounted evaluation and management module through the site network submodule. In addition to ensuring the transmission of monitoring data, the site network submodule also needs to enable bidirectional data transmission between the vehicle-mounted module (such as the vehicle-mounted display terminal) and the vehicle-mounted evaluation and management module (data center server) to ensure that positioning data, driving operation information, user identification information, etc., can be exchanged in real time, avoiding evaluation errors caused by data loss or delay.

[0037] The vehicle-mounted evaluation and management module is used to perform evaluation and analysis based on the target vehicle's location and driving information, audio and video data and user identification information within the target vehicle, and the target vehicle's operation in the examination venues for each subject, to obtain the evaluation results. The vehicle-mounted evaluation and management module includes a 3D simulation submodule; this submodule, based on a preset 3D electronic map of the examination venue and a 3D model of the target vehicle, combined with the target vehicle's location information, displays the target vehicle's trajectory and spatial posture in the examination venue in real time.

[0038] The vehicle-mounted assessment management module includes an automatic assessment submodule. The automatic assessment submodule pre-stores the violation judgment criteria for each assessment subject. Based on the target vehicle's location information, driving operation information, and operation status in the examination venue for each subject, it identifies whether the target vehicle has violated regulations such as crossing the line, deviating from the assessment route, or speeding. Based on the violation judgment criteria, it automatically generates the corresponding deduction results and determines the assessment judgment result.

[0039] The vehicle-mounted assessment management module includes an identity verification submodule. The identity verification submodule compares the facial information and fingerprint information in the user identification information collected by the identity collection device with the pre-stored candidate basic information. Only when the facial information and fingerprint information match the pre-stored candidate basic information is the target vehicle allowed to start the assessment process. If the comparison does not match, the identity verification failure prompt is output through the vehicle-mounted display terminal.

[0040] The vehicle-mounted evaluation and management module includes an audio and video storage sub-module; the audio and video storage sub-module receives and stores the audio and video data inside the target vehicle collected by the vehicle-mounted camera, and the audio and video data of the target vehicle operation collected by the site deployment module, and supports playback and query of the stored audio and video data when there is any objection to the evaluation results or when abnormal situations occur.

[0041] The vehicle-mounted assessment management module also includes a basic information management sub-module; the basic information management sub-module is used to input, modify, query and delete candidate personal information, coach information, test site information, target vehicle information, assessment subject information and assessment schedule.

[0042] The vehicle-mounted evaluation and management module is deployed on the server in the data center (as shown in Figure 1, the evaluation server, storage server, and domestic database). It is the "data processing center and evaluation core" of the system. It includes a 3D simulation submodule, an automatic evaluation submodule, an identity verification submodule, an audio and video storage submodule, and a basic information management submodule. Each submodule works together. The specific implementation is described below.

[0043] The vehicle-mounted evaluation and management module relies on the server in the computer room to run. The evaluation server is used to run the software programs of each functional sub-module, the storage server is used to store audio and video data and basic system data, and the domestic database is used for the management of structured data (such as candidate information and assessment results). All servers are connected through a switch to ensure smooth data interaction.

[0044] The functions of each submodule are implemented as follows: Basic Information Management Submodule: As shown in Figure 3, this submodule is used to input, modify, query, and delete candidate personal information (name, ID number, registration time), instructor information (name, instructor certificate number, subject in charge), examination venue information (venue number, coordinates of each subject area), target vehicle information (license plate number, vehicle model, sensor calibration data), assessment subject information (subject name, assessment requirements, full score, penalty standards for violations), and assessment schedule (assessment date, session, candidate list, assigned vehicle). All information is stored in a domestic database after being entered, providing basic data support for other submodules (such as the automatic evaluation submodule needing to call the penalty standards for violations of the assessment subjects).

[0045] Identity Verification Submodule: This submodule receives user identification information (fingerprint, face, and second-generation ID card information) transmitted from the vehicle module and compares it with the candidate's basic information pre-stored in the basic information management submodule. First, it compares whether the second-generation ID card information matches the pre-stored information. Then, it uses an AI face recognition algorithm to compare the similarity between the face image and the pre-stored face template (similarity threshold set to 95%). Finally, it uses a fingerprint matching algorithm to compare the matching degree between the fingerprint image and the pre-stored fingerprint template (matching degree threshold set to 90%). Only when all three match, the submodule sends a "Identity Verification Passed" command to the vehicle display terminal, allowing the target vehicle to start the assessment process. If any information does not match (e.g., face similarity is less than 95%), the vehicle display terminal outputs a "Identity Verification Failed, Please Verify Information and Try Again" message, and the assessment is prohibited from starting, effectively preventing cheating by proxy.

[0046] 3D Simulation Submodule: As shown in Figure 3, this submodule is based on the 3D electronic map of the examination site (built at a 1:1 scale, including the boundary lines and coordinates of reference objects for each subject area) and the 3D model of the target vehicle (built according to the actual size of the target vehicle, with the coordinates of key points on the vehicle body marked) pre-stored in the basic information management submodule. It receives the target vehicle's position information transmitted by the on-board module in real time, and overlays the 3D model of the target vehicle onto the 3D electronic map of the examination site through coordinate mapping, dynamically displaying the target vehicle's running trajectory and spatial posture in the examination site (such as whether the vehicle body is tilted or whether the wheels are on the line). The 3D simulation screen can be displayed synchronously on the on-board display terminal and the computer room monitoring terminal, making it convenient for candidates to understand their own position and for examiners to monitor the assessment process in real time.

[0047] Automatic Evaluation Submodule: This submodule is the core of the assessment and evaluation process. Its workflow is as follows: ① Retrieves the violation judgment criteria for the current assessment subject from the basic information management submodule (e.g., "100 points deducted for crossing the line during a right-angle turn" and "20 points deducted for exceeding the time limit for starting on a slope"); ② Receives real-time target vehicle position information (obtained through the 3D simulation submodule to determine the relative position of the vehicle to the site boundary), driving operation information (e.g., whether a seatbelt is not worn, whether coasting in neutral), and target vehicle operation status (e.g., whether it deviates from the assessment route, whether its speed exceeds the subject's speed limit) transmitted by the site control module; ③ Identifies violations through logical judgment algorithms: if the position information shows that the wheel coordinates exceed the site boundary line, it is judged as "crossing the line"; if the driving operation information shows that the seatbelt sensor has not been triggered and the engine has started, it is judged as "not wearing a seatbelt"; if the site monitoring data shows that the vehicle's speed exceeds the subject's speed limit (e.g., 5 km / h for starting on a slope), it is judged as "speeding"; ④ Automatically generates the corresponding deduction results based on the violation judgment criteria (e.g., 100 points deducted for crossing the line). The score is calculated by adding the deducted points to the total score and combining it with the full score of the subject to form the final "assessment result", which is then transmitted to the vehicle display terminal and storage server in real time.

[0048] Audio and video storage submodule: This submodule receives audio and video data from the target vehicle transmitted by the vehicle-mounted module and audio and video data from the target vehicle's operation transmitted by the site control module. It stores this data on the storage server according to the naming convention of "Assessment Date - Session - Examinee Name - Vehicle Number" (storage duration set to 90 days). When there are objections to the assessment results (e.g., examinees question the "crossing the line" judgment) or abnormal situations occur (e.g., data transmission interruption from the vehicle-mounted module), staff can use the submodule's "Time - Examinee - Subject" search function to retrieve the corresponding audio and video data for playback and verification of the assessment process details, providing objective evidence for dispute resolution.

[0049] The overall workflow of the vehicle-mounted evaluation system in this application relies on the collaboration of the above four modules. The specific steps are as follows: System initialization: Start the positioning base station to enable it to enter satellite tracking and differential data transmission state; start the site deployment module to ensure that the cameras in the full-subject monitoring submodule are working properly and that the site network submodule is communicating smoothly; complete the input and verification of the day's assessment information through the basic information management submodule of the vehicle-mounted assessment management module.

[0050] Candidate identity verification: Candidates enter the target vehicle and complete the collection of fingerprint, facial, and second-generation ID card information through the on-board module's identity collection device; the identity verification submodule completes the information comparison, and the assessment is allowed to start after the verification is successful.

[0051] Data collection and transmission during the assessment process: After the assessment starts, the positioning base station transmits differential data to the vehicle module in real time. The vehicle module calculates the target vehicle's location information and collects driving operation information and in-vehicle audio and video data. The site control module collects the target vehicle's site operation status in real time. All data is transmitted to the vehicle evaluation and management module in real time.

[0052] Real-time simulation and automatic evaluation: The 3D simulation submodule dynamically displays the vehicle's trajectory, while the automatic evaluation submodule identifies violations and deducts points in real time. The assessment information is simultaneously displayed on the in-vehicle display terminal.

[0053] Assessment Completion and Result Storage: After the candidate completes all subjects of the assessment, the automatic evaluation submodule generates the final assessment result (pass / fail, total score, and deduction details), the audio and video storage submodule stores the complete assessment audio and video, and the assessment results are uploaded to the basic information management submodule for archiving. Candidates can view the results through the vehicle display terminal.

[0054] Through the above implementation methods, this system achieves "high-precision positioning, full-process monitoring, and automated evaluation" for motor vehicle driver assessment, effectively solving the drawbacks of traditional evaluation methods and significantly improving the accuracy, fairness, and efficiency of the assessment.

[0055] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0056] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A vehicle-mounted evaluation system based on BeiDou differential positioning technology, characterized in that, The vehicle-mounted evaluation training system includes a positioning base station, a vehicle-mounted module, a site deployment module, and a vehicle-mounted evaluation management module. The positioning base station is used to collect BeiDou satellite carrier phase observation values ​​and to send the BeiDou satellite carrier phase observation values ​​and the base station coordinate information of the positioning base station to the vehicle module. The vehicle-mounted module is used to determine the location information and driving operation information of the target vehicle based on the Beidou satellite carrier phase observation value and the base station coordinate information of the positioning base station; collect audio and video data and user identification information inside the target vehicle, and send the audio and video data and user identification information inside the target vehicle to the vehicle-mounted evaluation and management module; and play and display examination information. The site control module is used to acquire images of the examination sites for each subject, obtain the operating status of the target vehicle in the examination sites for each subject, and transmit the operating status of the target vehicle in the examination sites for each subject to the vehicle evaluation and management module. The vehicle-mounted evaluation and management module is used to perform assessment and analysis based on the location information and driving operation information of the target vehicle, the audio and video data and user identification information inside the target vehicle, and the operation status of the target vehicle in the examination sites of each subject, and to obtain the assessment and evaluation results.

2. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 1, characterized in that, The positioning base station includes a Beidou signal receiver, a Beidou antenna, a wireless data transmission device, a power supply device, and a lightning protection device. The positioning base station continuously tracks Beidou satellites through the Beidou signal receiver and the Beidou antenna to collect Beidou satellite carrier phase observation values, and transmits the Beidou satellite carrier phase observation values ​​and base station coordinate information to the vehicle-mounted module via wireless communication through the wireless data transmission device. Furthermore, lightning protection is achieved through the lightning arrester, and long-term stable operation is ensured through the power supply equipment.

3. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 1, characterized in that, The vehicle-mounted module includes a BeiDou vehicle-mounted mobile station, a BeiDou positioning antenna, a vehicle-mounted signal sensor, an identity acquisition device, a vehicle-mounted camera, a vehicle-mounted speaker, and a vehicle-mounted display terminal. The BeiDou positioning antenna is communicatively connected to the BeiDou vehicle-mounted mobile station to collect BeiDou satellite signals. The BeiDou vehicle-mounted mobile station uses RTK technology to perform differential calculations on the BeiDou satellite signals and the BeiDou satellite carrier phase observation values ​​and base station coordinate information sent by the positioning base station, outputting the location information of the target vehicle. The vehicle-mounted signal sensor is connected to the vehicle-mounted display terminal via a CAN bus to collect the engine status, gear position, headlight status, handbrake status, seat belt status, clutch status, and brake status of the target vehicle as driving operation information. The identity acquisition device includes a fingerprint acquisition module, a face acquisition module, and a second-generation ID card reading module for collecting user identification information. The vehicle-mounted camera is used to collect audio and video data inside the target vehicle. The vehicle-mounted speaker is used to play assessment prompts and guidance content, and the vehicle-mounted display terminal is used to display the examination information.

4. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 1, characterized in that, The site control module includes a full-subject monitoring submodule and a site network submodule. The full-subject monitoring submodule deploys monitoring cameras in the assessment areas for reversing and shifting, U-turns on highways, right-angle turns, navigating S-shaped roads, navigating single-sided bridges, double-sided bridges, hill start and stop, circular obstacle courses, parallel parking, comprehensive driving skills, positioning and parking, passing through restricted gates, and narrow alleys, as well as in the assessment areas for forklift S-shaped obstacle courses, forklift loading and unloading, forklift hill start, forklift I-beam operation, and forklift right-angle turns, to collect the operating status of the target vehicles. The site network submodule establishes a dedicated network to ensure real-time data transmission between the operating status collected by the full-subject monitoring submodule and the vehicle-mounted evaluation and management module.

5. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 3, characterized in that, The vehicle-mounted evaluation and management module includes a 3D simulation submodule; the 3D simulation submodule, based on a preset 3D electronic map of the test site and a 3D model of the target vehicle, combined with the location information of the target vehicle, displays the running trajectory and spatial posture of the target vehicle in the test site in real time.

6. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 5, characterized in that, The vehicle-mounted assessment management module includes an automatic assessment submodule. The automatic assessment submodule pre-stores the violation judgment criteria for each assessment subject. Based on the target vehicle's location information, driving operation information, and operation status in the examination venue for each subject, it identifies whether the target vehicle has violated regulations such as crossing the line, deviating from the assessment route, or speeding. Based on the violation judgment criteria, it automatically generates the corresponding deduction results and determines the assessment judgment result.

7. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 6, characterized in that, The vehicle-mounted assessment management module includes an identity verification submodule; the identity verification submodule compares the facial information and fingerprint information in the user identification information collected by the identity collection device with the pre-stored candidate basic information, and only allows the target vehicle to start the assessment process when the facial information and fingerprint information match the pre-stored candidate basic information. If the comparison fails, an authentication failure message will be output through the vehicle-mounted display terminal.

8. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 7, characterized in that, The vehicle-mounted evaluation and management module includes an audio and video storage sub-module; the audio and video storage sub-module receives and stores the audio and video data inside the target vehicle collected by the vehicle-mounted camera, and the audio and video data of the target vehicle operation collected by the site deployment module, and supports playback and query of the stored audio and video data when there is any objection to the evaluation results or when abnormal situations occur.

9. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 8, characterized in that, The vehicle-mounted assessment management module also includes a basic information management sub-module; the basic information management sub-module is used to input, modify, query and delete candidate personal information, coach information, test site information, target vehicle information, assessment subject information and assessment schedule.

10. The vehicle-mounted evaluation system based on BeiDou differential positioning technology according to claim 3, characterized in that, The examination information displayed on the vehicle-mounted display terminal includes the examinee's name, ID number, current examination subject name, examination session, total score of the examination subject, deducted points, remaining points, and a description of the violation deduction items. The examination information is synchronized to the vehicle-mounted evaluation management module in real time.

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