A new energy vehicle fault detection multi-mode practical teaching method and system

Abstract

The present application relates to the technical field of new energy vehicle practical teaching, and discloses a multi-mode practical teaching method and system for new energy vehicle fault detection, which comprises the following steps: S1, deploying a real-time multi-mode practical teaching system; S2, acquiring detection data of a new energy vehicle; S3, generating new energy vehicle fault detection practical data; S4, interactive practical training for new energy vehicle fault detection; and S5, interactive practical training management for new energy vehicle fault detection. Through the combination of software and hardware, and based on the same new energy vehicle and the same system, the present application can realize the synchronous practical training of any number of people in multiple locations, solve the problems of limited number of new energy vehicles and limited space in actual teaching, and realize one-to-one vehicle and all-site teaching, single practical teaching mode and small number of serviced students, and also solve the problems of incomplete management of practical operation process and scores, and is suitable for the practical teaching of various new energy vehicles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicle practical training teaching, and particularly relates to a multi-mode practical training teaching method and system for new energy vehicle fault detection. BACKGROUND

[0002] With the popularization and development of new energy vehicles, the demand for related professional personnel training is increasing. Traditional automobile maintenance teaching methods often rely on physical vehicles and teacher experience for on-site teaching, but there are generally the following problems: teaching resources are scarce, the number of physical vehicles is limited, and it is difficult to meet the teaching needs of a large number of practical training students; only about 10% of students can use the practical training equipment in a class, 30% of students are observing, and 60% of students are waiting, the teaching efficiency is obviously very low, and the practical training students have a poor experience; the teaching cost is high, the new energy vehicles are expensive, and the maintenance cost is high, which is easy to cause wear and tear during the teaching process; the teaching efficiency is low, students have difficulty in intuitively understanding the internal structure and fault principle of the vehicle, and the fault troubleshooting process is complex and inefficient; in addition, the teaching safety is low, all students need to directly contact the physical vehicle, and there are certain site restrictions and safety hazards.

[0003] For example, in the prior art, Chinese utility model patent document CN204204322U discloses a whole vehicle comprehensive practical training platform remote control detection system, which provides a remote control fault diagnosis and elimination teaching system for fault demonstration, explanation, maintenance and training of the whole vehicle, which includes a whole vehicle electrical circuit diagram teaching board, a set of six 50-pin aviation plugs, a modified whole vehicle operation device, a vehicle-mounted fault box and a fault setting panel. The whole vehicle electrical circuit and the vehicle-mounted fault box are connected in series, and the faults are set by controlling the on-off of each circuit through the fault box; although this technology can visualize the display of each fault node through the branch connected in parallel by the aviation plug on the teaching board, the teaching board has an electrical plug for simulating maintenance of the fault, and cultivating students' ability to correctly analyze and solve practical problems; but this technology still only relies on the practical training platform for training, and cannot provide fault detection training of real vehicle running data, and cannot solve the problem of real-time data fault detection training of real vehicles by multiple people at the same time.

[0004] There are also some shortcomings in the management of the training process and assessment. For example, Chinese invention patent document CN106327939A discloses a virtual-real integrated real-time online teaching, training and assessment system for automotive electronic testing technology. Based on automotive training devices, it combines embedded software and remote control modules for virtual simulation, achieving a high degree of integration between "virtual" and "real". It allows multiple clients to simultaneously collect dynamic data from the training devices in real time. It includes: automotive training devices and data acquisition servers for real-time collection of dynamic data under the vehicle's operating status; a control system module for fault setting, fault diagnosis and data transmission; a remote assessment system module for online teaching, training and assessment of automotive electronic testing systems; and a teaching resource library module, including multimedia teaching and maintenance manuals. However, this existing technology still relies solely on training on a practical training platform and cannot be used for fault detection training based on real operational data from actual new energy vehicles. Furthermore, it cannot freely change vehicle models (to adapt to different controllers) during the testing training process. There are also issues such as significant differences in thinking and methods between the practical training platform and real vehicle fault detection and diagnosis, large errors in the collected data, and data acquisition errors. Therefore, it cannot guarantee the authenticity, full-process management, and accuracy of students' fault detection training. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-mode practical training method and system for fault detection in new energy vehicles. Through the combination of hardware and software, based on the same new energy vehicle and the same system, it enables any number of people to conduct simultaneous practical training in multiple locations. This solves the problems of limited number of new energy vehicles and locations in existing technologies, making it impossible to achieve one person per vehicle, requiring all students to be on-site for teaching, resulting in a single practical training mode and a small number of students served. It also addresses the issues of ensuring the authenticity and accuracy of data collection from real vehicles during practical training, as well as the incomplete management and assessment of the practical operation process for numerous students and the low level of informatization. This invention aims to meet the diverse practical training needs of more students, multiple modes, and unlimited locations and numbers of participants in real new energy vehicle training.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-mode practical training method for fault detection in new energy vehicles includes the following steps:

[0008] S1. Deploy a real-time multi-mode practical training and teaching system

[0009] S1-1 first deploys a real-time multi-mode training and teaching system to simultaneously support real-time multi-mode training and teaching of one vehicle to any number of people.

[0010] The multi-mode practical teaching system comprises a cloud server, a new energy vehicle, a vehicle data acquisition front-end machine, a fault detection practical host, and a student fault detection interactive terminal (specifically including a plurality of on-site practical student interactive terminal machines, a plurality of near-field practical student interactive terminal machines, and a plurality of remote practical student interactive terminal machines) connected and communicated with each other through a cable, an Internet of Things, or the Internet.

[0011] The teaching mode of the practical teaching system of real-time multi-mode practical teaching includes an on-site practical teaching mode in a practical workshop, a near-field practical teaching mode in a practical workshop, a remote classroom centralized practical teaching mode, and a remote distributed individual practical teaching mode.

[0012] S1-2: Install the vehicle data acquisition front-end machine to the connector port of the external new energy vehicle controller, and electrically connect the vehicle data acquisition front-end machine and the connector port of the external vehicle controller; after the vehicle data acquisition front-end machine works normally, debug and configure the communication between the fault detection practical host and the vehicle data acquisition front-end machine to realize normal transmission of the collected data; the vehicle data acquisition front-end machine detects the data through a detection circuit, generates detection data, and transmits the detection data to the fault detection practical host;

[0013] S2, obtaining detection data of a new energy vehicle

[0014] S2-1: detection data acquisition

[0015] After the vehicle data acquisition front-end machine generates the detection data, the fault detection practical host communicates with the vehicle data acquisition front-end machine, and transmits the detection data to the fault detection practical host; the fault detection practical host obtains and stores the detection data from the vehicle data acquisition front-end machine;

[0016] S2-2: detection data verification

[0017] Verify the obtained detection data with the original data saved by the fault detection practical host, the original data being the detection data when the external vehicle controller works normally; if the preliminary detection data is abnormal, mark the abnormal part of the data as abnormal data, and confirm and store the abnormal data;

[0018] S3, new energy vehicle fault detection practical data generation

[0019] S3-1 new energy vehicle fault setting

[0020] The fault setting box is electrically connected with the PLC controller, the fault setting box is internally provided with a plurality of lines, each line is matched with a terminal post of a plug-in port of an external automobile controller; each line is in series with a program-controlled switch, the program-controlled switch controls the on-off of the line; each program-controlled switch is electrically connected with the PLC controller, the PLC controller can control the state of each program-controlled switch according to the setting, thereby setting the on-off of the plurality of lines;

[0021] S3-2, detection state practical training data generation

[0022] The PLC controller acquires the abnormal data in step S3 and generates detection state data and stores in combination with the on-off state set in step S4;

[0023] S4, interactive practical training of new energy automobile fault detection

[0024] S4-1, synchronization of detection state data and remote interaction module

[0025] The fault detection practical training host synchronizes the detection state data to each end practical training student interaction terminal, and synchronizes the terminal post indication diagram of the corresponding plug-in port of the external automobile controller to the remote interaction module; the terminal practical training student performs data detection on the terminal post of each end practical training student interaction terminal according to the interface guidance of the remote interaction module;

[0026] S4-2, uploading of practical training student detection results

[0027] The terminal practical training student performs fault detection judgment practical training operation according to the interface guidance of the remote interaction module, and submits the self-judged detection result data to the fault detection practical training host through each end practical training student interaction terminal, or directly submits to the cloud server through the network, and then waits for the fault detection practical training host or the cloud server to determine and feedback the detection practical training operation result of the student;

[0028] S5, interactive practical training management of new energy automobile fault detection

[0029] S5-1, feedback of practical training operation process

[0030] The detection result is determined and fed back by the fault detection practical training host or the cloud server, and the result data of whether the practical training operation of each student terminal is correct is uploaded to the cloud server;

[0031] S5-2, practical training score management

[0032] The cloud server built-in program corresponds the practical operation process of each student terminal to the student account, and distributes each student through the fault detection practical host and each end practical student interactive terminal machine, prompts the student to correct the error operation, and finally the cloud server built-in program records the practical operation process of each student and gives the corresponding score.

[0033] A new energy vehicle practical signal collection fault detection system is used to implement the multi-mode practical teaching method of new energy vehicle fault detection, which comprises the following which work together:

[0034] A cloud server, a new energy vehicle, a cloud server, a new energy vehicle, an automobile data collection front-end machine, a fault detection practical host, a plurality of on-site practical student interactive terminal machines, a plurality of near-field practical student interactive terminal machines, and a plurality of remote practical student interactive terminal machines.

[0035] The on-site practical student interactive terminal machine, the near-field practical student interactive terminal machine, and the remote practical student interactive terminal machine have the same structure and comprise a remote interaction module and a fault detection sub-control module.

[0036] The new energy vehicle, the automobile data collection front-end machine, the fault detection practical host, and the plurality of on-site practical student interactive terminal machines are deployed on site in a practical workshop. The plurality of on-site practical student interactive terminal machines communicate with the fault detection practical host through WIFI or Bluetooth. The fault detection practical host comprises a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module, and a teaching interaction module.

[0037] The radio frequency transceiver module can receive and transmit radio frequency signals of multiple specified frequency bands.

[0038] The PLC controller comprises a network adapter. The network controller accesses a wired and / or wireless network.

[0039] The fault detection practical host further comprises an automobile controller connection line. One end of the automobile controller connection line is connected to the plug-in port of the automobile data collection front-end machine, and the other end is connected to the input interface of the fault detection practical host. The fault detection practical host communicates with the automobile data collection front-end machine through the automobile controller connection line to realize detection data acquisition and verification, and controls the fault setting box to set faults. The fault detection practical host synchronizes the detection data to each end practical student interactive terminal machine through radio frequency signals.

[0040] The plurality of near-field practical student interactive terminal machines are deployed in the near field of the practical workshop and communicate with the fault detection practical host through RF communication.

[0041] The cloud server and the plurality of remote practical training student interactive terminals are remotely deployed, the cloud server communicates with the fault detection practical training host through a network, and the plurality of remote practical training student interactive terminals communicate with the cloud server through a network;

[0042] The cloud server is internally provided with a new energy vehicle fault detection practical training teaching control program;

[0043] The teaching modes of the practical training teaching system of the real-time multi-mode practical training teaching include a practical training workshop on-site practical training teaching mode, a practical training workshop near-field practical training teaching mode, a remote classroom centralized practical training teaching mode and a remote distributed individual practical training teaching mode;

[0044] Before the on-site practical training student interactive terminal, the near-field practical training student interactive terminal and the remote practical training student interactive terminal are detected, the remote interactive module receives the multimedia detection guide sent by each practical training teaching mode, and the multimedia detection guide includes one or more of an interactive content interface, a video, an audio, a picture and a text;

[0045] The automobile controller connection line includes a plurality of wire harnesses; the fault setting box includes a plurality of terminal connectors, a plurality of program control switches matched with the terminal connectors, and each program control switch is electrically connected with the PLC controller; the PLC controller can set at least one fault point;

[0046] The fault detection practical training host is internally provided with a plurality of automobile controller communication interface terminal arrangement diagrams of a plurality of new energy vehicles; the communication interface terminal arrangement diagram includes an ECU position, ECU plug-in interface line data, fuse relay box line interface data, a start button, an instrument, a diagnosis port and decoder data;

[0047] The fault detection practical training host can display the corresponding interfaces of each end practical training student interactive terminal through virtual simulation and perform actual detection; and receive the submitted detection results of each end practical training student interactive terminal and perform result determination;

[0048] The automobile data acquisition front-end machine includes a radio frequency transmitting module, a detection panel and a data collector connected in sequence;

[0049] The automobile data acquisition front-end machine is electrically connected with an external automobile controller plug-in port;

[0050] The radio frequency transmitting module can transmit radio frequency signals of a specified frequency band; the radio frequency transceiver module transmits detection data to the fault detection practical training host;

[0051] The detection panel includes a plurality of terminal connectors, each terminal connector corresponds to a plug-in port of an automobile controller; the data collector is powered by a 12v or 5v power supply provided by each plug-in port of the automobile controller, and needs to be signal optocoupler isolated or voltage isolated;

[0052] The data collector further comprises a detection circuit and a protection circuit; the protection circuit is arranged at the front end of the detection circuit; the fault detection practical training host comprises a radio frequency receiving module, a plurality of detection signal terminals and a single-chip microcomputer which are sequentially and electrically connected with the radio frequency transceiver module; the radio frequency receiving module can receive radio frequency signals of a specified frequency band of the fault detection practical training host; the single-chip microcomputer is provided with static or dynamic signals of a plurality of nodes;

[0053] The automobile data collection front-end machine further comprises a grounding connection line having one end connected with the protection circuit R66 and the other end connected with the negative electrode of an external automobile storage battery; and the detection circuit comprises a collector chip, and the collector chip is of SCA7606 type.

[0054] Compared with the prior art, the present application has at least the following beneficial effects:

[0055] 1. The multi-mode practical training teaching method and system for new energy automobile fault detection provided by the present application adopt real new energy vehicles, combine software and hardware, are based on the same new energy automobile and the same system, adopt an interactive practical training mode of field + near field + remote, can realize synchronous practical training of any number of people in multiple places, solve the problems of limited number of new energy vehicles and limited place in the actual teaching of the prior art, cannot realize one-to-one training, the students need to be in the field for teaching, the practical training teaching mode is single, the number of students served is small and the like, and also solve the problems of authenticity and accuracy of real vehicle data collection in the practical training process, and the problems of incomplete management and assessment management of the practical training operation of a large number of students and low informatization degree, and can meet the practical training teaching needs of more students (not limited in number), multiple modes and various real new energy vehicles in various places.

[0056] 2. The multi-mode practical training teaching method and system for new energy automobile fault detection provided by the present application are aimed at solving the problems of low detection efficiency and large difference from the real working scene in the automobile fault diagnosis of the prior art. The system collects voltage signals of each terminal line of the module jacks of the power battery, the drive motor and the high-voltage electric control box of the automobile, and synchronously displays the above information to each remote interactive module and fault detection sub-control module. By connecting the automobile diagnosis port, the fault codes and self-checking state data streams of each controller of the automobile are obtained, the above information is integrated into key data streams and fault code information required for automobile fault training, and is synchronously sent and displayed to each remote interactive module; the present application judges the vehicle network fault by the thought of whether the original vehicle decoding module can enter the ID interface of the real vehicle controller.

[0057] 3、The present application solves the problems of limited number of new energy vehicles, limited space, single teaching and training mode, and small number of students served in actual teaching, and the present application can realize simultaneous training of multiple people in multiple places based on the same new energy vehicle and the same system, and can solve the problems of incomplete process management and performance management of training operation and low informatization degree; students do not need to operate on the real vehicle, and only need to operate on the interactive terminal of each end, cooperate with the fault code and data flow information displayed on the remote interaction module, and use the principle of back plug detection to detect faults, so that the fault detection efficiency is improved.

[0058] 4、The new energy vehicle fault detection multi-mode training teaching method and system can quickly obtain and integrate vehicle fault codes and data flow information through the vehicle message analysis module on the system, can quickly analyze and diagnose to narrow down the fault range, and improve the fault detection efficiency. In addition, the device can standardize the real vehicle fault detection and diagnosis and exclusion process of students. The device has a remote data synchronization function, and connects the fault detection training host and the interactive terminal of each end through a wireless module, realizes remote data synchronization, facilitates students to perform fault detection training, reduces the repeated plugging and detection of students, reduces the loss of the controller, and directly displays the real vehicle interface and terminal on the interactive terminal of each end, facilitates fault checking, improves the detection efficiency.

[0059] 5、The new energy vehicle fault detection multi-mode training teaching method and system directly collects real vehicle data of the line of the controller and each power distribution box plug-in interface, can realize line measurement without disassembly, provides simultaneous detection of multiple people, and free measurement of multiple controllers of the vehicle under the same system.

[0060] 6、The new energy vehicle fault detection multi-mode training teaching method and system can avoid the loss of real vehicles, does not need to use real vehicles for fault detection training, avoids repeated disassembly of real vehicle ornaments, repeated plugging of controllers, and repeated puncture measurement of plug-in interface terminals, reduces the loss of line virtual connection and poor contact, reduces the teaching cost, saves teaching resources, and can realize simultaneous fault detection training of multiple people, without the need to purchase a large number of real vehicles, and saves teaching resources.

[0061] 7、The new energy vehicle fault detection multi-mode practical teaching method and system provided by the application, through remote synchronous detection data, through the wireless module connection fault detection practical host and automobile data acquisition front-end machine, realize remote data synchronization, convenient for students to carry out fault detection practical training; Realize multi-band wireless signal switching, the automobile data acquisition front-end machine can realize the switching detection and diagnosis of all vehicle controllers by adjusting the wireless signal of different frequency bands, improve the flexibility and efficiency of practical training. With virtual simulation function, the fault detection practical host can display the interface corresponding to the automobile data acquisition front-end machine through virtual simulation and carry out actual detection, which is convenient for teachers' teaching and management. Detection result determination and feedback, the fault detection practical host can determine according to the detection result submitted by the student, and give feedback, help students find problems in time and improve. The software function is rich, the software contains the circuit diagram of each system, the fault setting interface, the remote management, the selection of each controller of the automobile and other functions, which is convenient for teachers to teach and manage.

[0062] 8、The new energy vehicle fault detection multi-mode practical teaching method and system provided by the application can access various automobile controllers, and the fault detection practical host can connect and detect various automobile controllers, including power battery management module, motor controller module, electric control box control module, engine control module, vehicle body control module, anti-theft system control module, ESP control module and the like. The 485 function can be expanded: the 485 function can be expanded, connected with the teacher computer, which is convenient for teachers to monitor, control and receive data, control channel switching, control the voltage data transmission of each channel, data change, data increase, and synchronize the display data with students. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0064] Figure 1 It is the overall module composition structure diagram of the multi-mode practical teaching system of the embodiment of the application;

[0065] Figure 2 It is the module composition structure diagram of the fault detection practical host of the embodiment of the application;

[0066] Figure 3 It is the connection and communication relationship diagram of the fault detection practical host, the automobile controller and the automobile data acquisition front-end machine in the multi-mode practical teaching system of the embodiment of the application;

[0067] Figure 4It is the main flow schematic diagram of the new energy automobile multi-mode practical teaching method of the embodiment of the application;

[0068] Figure 5 It is the flow schematic diagram when the fault detection practical host is not set with faults of the embodiment of the application;

[0069] Figure 6 It is the flow schematic diagram when the fault detection practical host is set with faults of the embodiment of the application;

[0070] Figure 7 It is the A area and B area signal collection structure schematic diagram of the embodiment of the application;

[0071] Figure 8 It is the connection structure schematic diagram of the external automobile controller and the automobile data collection front end machine of the embodiment of the application;

[0072] Figure 9 It is the network connection structure schematic diagram of the automobile data collection front end machine and the fault detection practical host of the embodiment of the application;

[0073] Figure 10 It is the connector port structure schematic diagram of the B area sub-automobile data collection front end machine and the external automobile controller (cockpit) of the automobile data collection front end machine of the embodiment of the application;

[0074] Figure 11 It is the protection circuit schematic diagram of the automobile data collection front end machine of the embodiment of the application;

[0075] Figure 12 It is the protection circuit and automobile storage battery negative pole connection schematic diagram of the automobile data collection front end machine of the embodiment of the application;

[0076] Figure 13 It is the connection schematic diagram of the automobile data collection front end machine, the fault detection practical host and the external automobile controller of the embodiment of the application;

[0077] Figure 14 It is the external automobile controller position schematic diagram displayed by the remote interaction module of the embodiment of the application;

[0078] Figure 15 It is the connector port schematic diagram of the power distribution assembly displayed by the remote interaction module of the embodiment of the application;

[0079] Figure 16 It is the connector port schematic diagram of the power battery management system displayed by the remote interaction module of the embodiment of the application;

[0080] Figure 17 It is the working schematic diagram of the remote interaction module and each end practical student interaction terminal machine of the embodiment of the application;

[0081] Figure 18 is a working schematic diagram of a plurality of remote interaction modules of an embodiment of the present application and each end practical training student interaction terminal machine;

[0082] Figure 19 is a schematic diagram of a circuit board of an automobile data acquisition front-end machine. DETAILED DESCRIPTION

[0083] Please refer to the attached Figures 1 to 19 In order to enable the personnel in the technical field to better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without making creative efforts shall belong to the scope of protection of the present application.

[0084] In the following description, for the sake of clarity and simplicity of description, not all the plurality of components shown in the drawings are described. The plurality of components shown in the drawings provide the complete disclosure of the present application for the ordinary skilled in the art. The operation of many components is familiar and obvious to the skilled in the art.

[0085] Embodiment 1

[0086] The multi-mode practical training teaching method for new energy vehicle fault detection provided in the present embodiment adopts the field + near field + remote practical training teaching mode + fault detection practical training host and a plurality of distributed student interaction terminal machines, and can realize one vehicle to multiple persons and one system to multiple persons practical training, which includes the following steps:

[0087] S1, deploy a real-time multi-mode practical training teaching system

[0088] S1-1, first deploy a real-time multi-mode practical training teaching system to synchronously support one vehicle to any multiple persons real-time multi-mode practical training teaching;

[0089] The multi-mode practical training teaching system includes cloud server, new energy vehicle, automobile data acquisition front-end machine, fault detection practical training host, a plurality of field practical training student interaction terminal machines, a plurality of near field practical training student interaction terminal machines, and a plurality of remote practical training student interaction terminal machines, which are connected and communicated with each other through cable, Internet of Things or Internet;

[0090] The teaching mode of the practical training teaching system of the real-time multi-mode practical training teaching includes: practical training workshop field practical training teaching mode, practical training workshop near field practical training teaching mode, remote classroom centralized practical training teaching mode and remote distributed individual practical training teaching mode;

[0091] The real training workshop site refers to the space area in the real training workshop for real training; the real training workshop near field refers to the space area outside and around the real training workshop for real training, which is generally a classroom or other teaching place in the school campus (within the effective transmission distance of RF communication, which is usually 100 to 300 meters from the fault detection training host); the remote is any place through Internet communication, including a remote classroom centralized real training teaching place or a remote distributed individual real training teaching place, which completely breaks through the geographical limitations of real training.

[0092] S1-2: Install the automobile data acquisition front-end machine to the connector port of the external new energy automobile controller, and the automobile data acquisition front-end machine is electrically connected with the terminal post in the connector port of the external automobile controller; after the automobile data acquisition front-end machine works normally, debug and configure the communication between the fault detection training host and the automobile data acquisition front-end machine to realize normal transmission of collected data; the automobile data acquisition front-end machine detects the data through a detection circuit, generates detection data, and transmits the detection data to the fault detection training host;

[0093] S2, obtaining detection data of a new energy automobile

[0094] S2-1: detection data acquisition

[0095] After the automobile data acquisition front-end machine generates detection data, the fault detection training host communicates with the automobile data acquisition front-end machine, transmits the detection data to the fault detection training host, and the fault detection training host obtains and stores the detection data from the automobile data acquisition front-end machine;

[0096] S2-2: detection data verification

[0097] The obtained detection data is verified with the original data stored in the fault detection training host, and the original data is the detection data when the external automobile controller works normally; if the preliminary detection data is abnormal, the abnormal part of the data is marked as abnormal data, and the abnormal data is confirmed and stored;

[0098] S3, new energy automobile fault detection training data generation

[0099] S3-1 new energy automobile fault setting

[0100] The fault setting box is electrically connected with the PLC controller, and the fault setting box is internally provided with a plurality of lines, each line is matched with the terminal post of the connector port of the external automobile controller; each line is connected in series with a program control switch, and the program control switch controls the on-off of the line; each program control switch is electrically connected with the PLC controller, and the PLC controller can control the state of each program control switch according to the setting, so as to set the on-off of the plurality of lines;

[0101] S3-2, detection state practical training data generation

[0102] The PLC controller acquires the abnormal data in step S3 and generates detection state data in combination with the on-off state set in step S4, and stores the detection state data;

[0103] S4, interactive practical training for new energy vehicle fault detection

[0104] S4-1, synchronization of detection state data and remote interaction module

[0105] The fault detection practical training host synchronizes the detection state data to each end practical training student interaction terminal, and synchronizes the corresponding external automobile controller connector port terminal indication diagram to the remote interaction module. The terminal practical training student performs data detection on the terminal of each end practical training student interaction terminal according to the interface guidance of the remote interaction module;

[0106] S4-2, practical training student detection result uploading

[0107] The terminal practical training student performs fault detection judgment practical training operation according to the interface guidance of the remote interaction module, and submits the self-judgment detection result data to the fault detection practical training host through each end practical training student interaction terminal, or directly submits to the cloud server through the network, and then waits for the fault detection practical training host or the cloud server to determine and feedback the detection practical training operation result of the student;

[0108] S5, interactive practical training management for new energy vehicle fault detection

[0109] S5-1, practical operation process feedback

[0110] The fault detection practical training host or the cloud server determines and feeds back the detection result, and uploads the result data of whether the practical operation of each student terminal is correct to the cloud server;

[0111] S5-2, practical training score management

[0112] The cloud server built-in program corresponds the practical operation process of each student terminal to the student account, and distributes it to each student through the fault detection practical training host and each end practical training student interaction terminal, prompts the student to correct the wrong operation, and finally the cloud server built-in program records the practical operation process of each student and gives the corresponding score.

[0113] A new energy vehicle practical vehicle signal acquisition fault detection system for implementing the multi-mode practical training teaching method for new energy vehicle fault detection, which comprises the following which work together:

[0114] The cloud server, the new energy vehicle, the cloud server, the new energy vehicle, the vehicle data acquisition front-end machine, the fault detection training host, a plurality of on-site training student interactive terminal machines, a plurality of near-field training student interactive terminal machines, and a plurality of remote training student interactive terminal machines;

[0115] The on-site training student interactive terminal machine, the near-field training student interactive terminal machine, and the remote training student interactive terminal machine have the same structure and include a remote interaction module and a fault detection sub-control module.

[0116] The new energy vehicle, the vehicle data acquisition front-end machine, the fault detection training host, and a plurality of on-site training student interactive terminal machines are deployed on site in a training workshop. The plurality of on-site training student interactive terminal machines communicate with the fault detection training host using WIFI or Bluetooth. The fault detection training host includes a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module, and a teaching interaction module.

[0117] The radio frequency transceiver module can receive and transmit radio frequency signals of a plurality of specified frequency bands.

[0118] The PLC controller includes a network adapter. The network controller accesses a wired and / or wireless network.

[0119] The fault detection training host further includes an automobile controller connection line. One end of the automobile controller connection line is connected to a plug-in port of the vehicle data acquisition front-end machine, and the other end is connected to an input interface of the fault detection training host. The fault detection training host communicates with the vehicle data acquisition front-end machine through the automobile controller connection line to realize detection data acquisition and verification and control a fault setting box to set faults. The fault detection training host synchronizes detection data to each end training student interactive terminal machine through radio frequency signals.

[0120] A plurality of near-field training student interactive terminal machines are deployed in a near-field training workshop and communicate with the fault detection training host using RF communication.

[0121] The cloud server and a plurality of remote training student interactive terminal machines are remotely deployed. The cloud server communicates with the fault detection training host through a network, and the plurality of remote training student interactive terminal machines communicate with the cloud server using a network.

[0122] The cloud server has a new energy vehicle fault detection training teaching control program built-in.

[0123] The teaching modes of the real-time multi-mode training teaching system include on-site training teaching modes in a training workshop, near-field training teaching modes in a training workshop, remote classroom centralized training teaching modes, and remote distributed individual training teaching modes.

[0124] The remote interaction module will receive the multimedia detection guide sent by each practical teaching mode before the on-site practical student interactive terminal, the near-field practical student interactive terminal and the remote practical student interactive terminal are detected, and the multimedia detection guide includes one or more of the following: interactive content interface, video, audio, picture and text;

[0125] The automobile controller connection line includes a plurality of wire harnesses; the fault setting box includes a plurality of wiring terminals and a plurality of program control switches matched with the wiring terminals, each program control switch is electrically connected with the PLC controller; the PLC controller can set at least one fault point;

[0126] The fault detection practical host machine is built-in with a plurality of automobile controller communication interface wiring terminal arrangement diagrams of a plurality of new energy automobiles; the communication interface wiring terminal arrangement diagram includes ECU position, each ECU plug-in interface line data, fuse relay box line interface data, start button, instrument, diagnostic port and decoder data;

[0127] The fault detection practical host machine can display the corresponding interface of each end practical student interactive terminal through virtual simulation and perform actual detection; and receive the submitted detection results of each end practical student interactive terminal and perform result determination;

[0128] The automobile data acquisition front-end machine includes a radio frequency transmitting module, a detection panel and a data collector connected in sequence;

[0129] The automobile data acquisition front-end machine is electrically connected with the external automobile controller plug-in port;

[0130] The radio frequency transmitting module can transmit radio frequency signals of a specified frequency band; the radio frequency transceiver module transmits the detection data to the fault detection practical host machine;

[0131] The detection panel includes a plurality of wiring terminals, each wiring terminal corresponds to the plug-in port of the automobile controller; the data collector uses the 12v or 5v power supply of the plug-in port of each automobile controller to collect the required signal optical coupling isolation or voltage isolation;

[0132] The data collector further includes a detection circuit and a protection circuit; the protection circuit is arranged at the front end of the detection circuit; the fault detection practical host machine includes a radio frequency receiving module, a plurality of detection signal terminals and a single-chip microcomputer connected in sequence and matched with the radio frequency transceiver module; the radio frequency receiving module can receive the radio frequency signals of the specified frequency band of the fault detection practical host machine; the single-chip microcomputer is provided with static or dynamic signals of a plurality of nodes;

[0133] The automobile data acquisition front-end machine further comprises a grounding connection line having one end connected with the protection circuit R66 and the other end connected with the negative pole of the external automobile storage battery.

[0134] The detection principle adopted by the embodiment of the present application is that: first, each practical training student interactive terminal is designed, and through the back plug detection principle, the terminal voltage of the line signal of the corresponding plug-in connector of the automobile real vehicle is detected on each practical training student interactive terminal, and the same line equipotential principle is used to judge whether the line fault (open circuit, short circuit, virtual connection) between the connection terminals occurs.

[0135] Since the automobile line level signal is divided into power supply, one-way electrical signal and bidirectional network signal (such as CAN, LIN, etc.), among which the bidirectional network signal is mainly differential voltage waveform, and since it has the function of bidirectional transceiver, the same line equipotential principle cannot be used to detect and judge the line fault, therefore, the present application proposes to synchronize the message response of the automobile controller ID address on each practical training student interactive terminal; when the students detect on each practical training student interactive terminal, each practical training student interactive terminal receives the fault detection practical training host through network communication to analyze the message, and then judges whether the vehicle-mounted network has a fault (open circuit, short circuit, virtual connection) through the thought of whether each practical training student interactive terminal can enter the corresponding controller interface, that is, the embodiment judges the vehicle-mounted network fault through the thought of whether the original vehicle decoding module can enter the ID interface of the real vehicle controller, and the flowchart of the method can be seen from Figures 5 to 6 .

[0136] Embodiment 2

[0137] The new energy automobile fault detection multi-mode practical teaching method and system provided by the embodiment are optimization and improvement based on the embodiment 1.

[0138] Please refer to the attached Figures 1 to 19 The new energy automobile remote practical teaching fault detection method and system provided by the embodiment can improve the detection efficiency, standardize the real fault diagnosis process, improve the teaching flexibility, and meet the real scene of the post work.

[0139] The new energy automobile fault detection multi-mode practical teaching method provided by the embodiment further comprises the following steps in step S1:

[0140] S1-3, configure an automobile data acquisition front-end machine

[0141] The plug-in port of the automobile data acquisition front-end machine and the external automobile controller is electrically connected, the automobile data acquisition front-end machine includes a radio frequency transmitting module, the radio frequency transmitting module can emit radio frequency signals of a specified frequency band; the automobile data acquisition front-end machine further includes a data acquisition device and a detection panel; the data acquisition device is powered by the 12V or 5V power supply provided by the plug-in port of each automobile controller; after the data acquisition device is connected to the plug-in port of the external automobile controller, the radio frequency communication with the fault detection practical training host is normal; the automobile data acquisition front-end machine can read the data of the external automobile controller connected thereto, detect the data through a detection circuit, and generate detection data; the data acquisition device includes a protection circuit and a detection circuit connected electrically; the protection circuit is arranged before the detection circuit; the detection panel is matched with the plug-in port of the external automobile controller;

[0142] S1-4, configuring a fault detection practical training host

[0143] The fault detection practical training host further includes a radio frequency transceiver module, a fault setting box, a power module and an input interface; the radio frequency transceiver module can receive and emit radio frequency signals of multiple specified frequency bands; after the fault detection practical training host is powered on, each module is self-checked normally and the network connection is normal.

[0144] In the step S1-1, the field practical training student interactive terminal, the near-field practical training student interactive terminal and the remote practical training student interactive terminal have the same structure and each include a remote interaction module and a fault detection sub-control module; the three kinds of practical training student interactive terminals are referred to as student terminals below;

[0145] The new energy automobile, the automobile data acquisition front-end machine, the fault detection practical training host and the multiple field practical training student interactive terminals are deployed in a practical training workshop; the fault detection practical training host is internally provided with a communication interface wiring terminal arrangement diagram of multiple automobile controllers of multiple new energy automobiles; the communication interface wiring terminal arrangement diagram includes an ECU position, the line data of each ECU plug-in interface, the line interface data of a fuse relay box, a start button, an instrument, a diagnosis port and decoder data;

[0146] The multiple field practical training student interactive terminals communicate with the fault detection practical training host through WIFI or Bluetooth; the fault detection practical training host includes a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module and a teaching interaction module;

[0147] The multiple near-field practical training student interactive terminals are deployed in a near-field practical training workshop and communicate with the fault detection practical training host through RF communication;

[0148] The cloud server and the plurality of remote practical training student interactive terminals are remotely deployed, the cloud server communicates with the fault detection practical training host through a network, and the plurality of remote practical training student interactive terminals communicate with the cloud server through a network;

[0149] The cloud server is built-in with a new energy vehicle fault detection practical training teaching control program;

[0150] Before the on-site practical training student interactive terminal, the near-field practical training student interactive terminal and the remote practical training student interactive terminal are detected, the remote interaction module receives the multimedia detection guide sent by each practical training teaching mode, and the multimedia detection guide includes one or more of an interactive content interface, a video, an audio, a picture and a text.

[0151] The new energy vehicle fault detection multi-mode practical training teaching method provided in the embodiment specifically further includes the following steps in step S2.

[0152] S2-3, acquiring detection data in a wireless mode

[0153] The radio frequency transceiver module of the fault detection practical training host is switched to a specified frequency band, the fault detection practical training host can receive the radio frequency signal transmitted by the automobile data acquisition front-end machine of the same frequency band, the PLC controller processes and identifies the model of the automobile controller, and stores the detection data;

[0154] S2-4, acquiring detection data in a wired mode

[0155] One end of the automobile controller connection line is connected to the plug-in port of the automobile data acquisition front-end machine, and the other end is connected to the fault detection practical training host.

[0156] In the case of abnormal acquisition of detection data in a wireless mode: when the fault detection practical training host cannot communicate with the automobile data acquisition front-end machine repeatedly for multiple times, the PLC controller reads the communication data of the automobile data acquisition front-end machine through the automobile controller connection line, the PLC controller processes and identifies the model of the automobile controller, and stores the detection data.

[0157] The step S3 further includes the following steps.

[0158] S3-3, automatic data verification

[0159] The PLC controller compares and analyzes the acquired detection data with the original data saved by the fault detection practical training host, if there is a difference, the PLC controller will mark the part of the data as abnormal data, and mark the abnormal connection terminal serial number;

[0160] S3-4, data line data verification

[0161] According to the abnormal terminal sequence prompted in step S2-4, the manual measurement of the terminal is carried out on the detection panel of the automobile data acquisition front end machine by the artificial, the data is corrected manually after the measurement, and the abnormal terminal sequence is marked;

[0162] S3-5, data confirmation

[0163] The abnormal terminal sequence marked in steps S3-3 and S3-4 is confirmed and stored.

[0164] The step S4 further includes the following steps:

[0165] S4-3, detection state data synchronization

[0166] The PLC controller reads the detection state data and synchronizes the detection state data to the multiple terminal practical training student interactive terminal machines remotely;

[0167] The terminal practical training student interactive terminal machine includes a single-chip microcomputer, a plurality of terminals matched with the plug-in port of the external automobile controller, and a terminal sequence;

[0168] The single-chip microcomputer sets the static or dynamic signal of the matched plurality of nodes to the specified terminal according to the received detection state data;

[0169] S4-4, synchronous remote interaction module

[0170] The PLC controller synchronizes the terminal post indication diagram of the matched plug-in port of the automobile controller to the remote interaction module, and the remote interaction module interface displays the terminal post indication diagram of the corresponding plug-in port of the external automobile controller.

[0171] The step S5 further includes the following steps:

[0172] S5-3, detection result submission

[0173] The terminal practical training student detects each terminal of the terminal practical training student interactive terminal machine according to the multimedia detection guidance of the remote interaction module, and records the detection result to the specified position of the remote interaction module; after all the detection, the data is submitted to the fault detection practical training host or cloud server in the remote interaction module;

[0174] S5-4, detection result determination and feedback

[0175] After the fault detection practical training host or cloud server receives the detection result submitted by the remote interaction module, the result is determined, and the determination result is displayed to the remote interaction module; the incorrect detection result is fed back to the remote interaction module, prompting the terminal practical training student to re-detect.

[0176] A new energy vehicle real vehicle signal collection fault detection system, implements the above detection method, which includes mutually cooperating:

[0177] A cloud server, a new energy vehicle, a cloud server, a new energy vehicle, an automobile data collection front-end machine, a fault detection practical training host, a plurality of on-site practical training student interactive terminal machines, a plurality of near-field practical training student interactive terminal machines, and a plurality of remote practical training student interactive terminal machines.

[0178] Among them, the on-site practical training student interactive terminal machine, the near-field practical training student interactive terminal machine, and the remote practical training student interactive terminal machine have the same structure and include a remote interaction module and a fault detection sub-control module.

[0179] The new energy vehicle, the automobile data collection front-end machine, the fault detection practical training host, and the plurality of on-site practical training student interactive terminal machines are deployed on-site in a training workshop. The plurality of on-site practical training student interactive terminal machines communicate with the fault detection practical training host using WIFI or Bluetooth. The fault detection practical training host includes a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module, and a teaching interaction module.

[0180] The radio frequency transceiver module can receive and transmit radio frequency signals of multiple specified frequency bands.

[0181] The PLC controller includes a network adapter, and the network controller accesses a wired and / or wireless network.

[0182] The fault detection practical training host further includes an automobile controller connection line. One end of the automobile controller connection line is connected to a plug-in port of the automobile data collection front-end machine, and the other end is connected to an input interface of the fault detection practical training host. The fault detection practical training host communicates with the automobile data collection front-end machine through the automobile controller connection line to realize detection data acquisition and verification, and controls a fault setting box to set faults. The fault detection practical training host synchronizes detection data to each end practical training student interactive terminal machine through radio frequency signals.

[0183] The plurality of near-field practical training student interactive terminal machines are deployed in a near-field of the training workshop and communicate with the fault detection practical training host using RF communication.

[0184] The cloud server and the plurality of remote practical training student interactive terminal machines are remotely deployed. The cloud server communicates with the fault detection practical training host through a network, and the plurality of remote practical training student interactive terminal machines communicate with the cloud server using a network.

[0185] The cloud server is built-in with a new energy vehicle fault detection practical training teaching control program.

[0186] The teaching mode of the real training teaching system of the real-time multi-mode real training teaching includes: a real training workshop site real training teaching mode, a real training workshop near field real training teaching mode, a remote classroom centralized real training teaching mode and a remote distributed personal real training teaching mode; before the site real training student interactive terminal, the near field real training student interactive terminal and the remote real training student interactive terminal are detected, the remote interactive module will receive the multimedia detection guide sent by each real training teaching mode, and the multimedia detection guide includes one or more of interactive content interface, video, audio, picture and text;

[0187] The automobile controller connection line includes a plurality of wire harnesses; the fault setting box includes a plurality of wiring terminals, a plurality of program control switches matched with the wiring terminals, and each program control switch is electrically connected with the PLC controller; the PLC controller can set at least one fault point;

[0188] The fault detection real training host machine is built-in with a plurality of automobile controller communication interface wiring terminal arrangement diagrams of a plurality of new energy vehicles; the communication interface wiring terminal arrangement diagram includes: ECU position, each ECU plug-in interface line data, fuse relay box line interface data, start button, instrument, diagnostic port and decoder data;

[0189] The fault detection real training host machine can display the corresponding interface of each end real training student interactive terminal through virtual simulation and perform actual detection; and receive the submitted detection results of each end real training student interactive terminal and perform result determination;

[0190] The automobile data acquisition front-end machine includes a radio frequency transmitting module, a detection panel and a data collector connected in sequence;

[0191] The automobile data acquisition front-end machine is electrically connected with the external automobile controller plug-in port;

[0192] The radio frequency transmitting module can emit radio frequency signals of a specified frequency band; the radio frequency transceiver module transmits the detection data to the fault detection real training host machine;

[0193] The detection panel includes a plurality of wiring terminals, each of which corresponds to the plug-in port of the automobile controller; the data collector uses the 12v or 5v power supply of each automobile controller plug-in port for power supply, and collects the required signal optical coupling isolation or voltage isolation;

[0194] The data collector further includes a detection circuit and a protection circuit; the protection circuit is arranged at the front end of the detection circuit; the fault detection real training host machine includes a radio frequency receiving module, a plurality of detection signal terminals and a single-chip microcomputer connected in sequence and matched with the radio frequency transceiver module; the radio frequency receiving module can receive the radio frequency signals of the specified frequency band of the fault detection real training host machine; the single-chip microcomputer can set the static or dynamic signals of a plurality of nodes.

[0195] The automobile controller connection line includes a plurality of wire harnesses; when the number of wire harnesses is less than 20, the automobile controller connection line adopts a daisy chain and RF radio frequency; when the number of wire harnesses exceeds 20, a wire arrangement mode of multiple colors is adopted; the automobile controller capable of being connected and detected by the fault detection practical training host includes: a power battery of the automobile, a driving motor, a high-voltage electric control box and an engine module. The fault setting box includes a plurality of wiring terminals and a plurality of program-controlled switches matched with the wiring terminals, and each program-controlled switch is electrically connected with the PLC controller; the PLC controller can set at least one fault point; the detection data includes static voltage signals (100 ms low-frequency update and return data) and dynamic waveform signals (after starting to identify dynamic signals, the signals are sent to the sub-control terminal, and the above-mentioned identification signals are updated with data at a low frequency of 100 sm synchronously, and the display signals are simulated to the corresponding lines through a waveform generator); the dynamic waveform signals are dynamic signals identified by starting (including lines, baud rate and bus type: can / lin);

[0196] The PLC controller detects port data of the ECU, including static voltage data and dynamic waveform data, and uses a signal generator to process the static voltage data and the dynamic waveform data, thereby reducing communication data pressure;

[0197] The fault detection practical training host is internally provided with a communication interface wiring terminal arrangement diagram of a plurality of automobile controllers; the communication interface wiring terminal arrangement diagram includes: ECU positions, line data of each ECU plug-in interface, line interface data of a fuse relay box, a start button, an instrument, a diagnosis port and decoder data;

[0198] The fault detection practical training host can display corresponding interfaces of each end practical training student interactive terminal machine and perform actual detection through virtual simulation; and the fault detection practical training host can receive detection results submitted by each end practical training student interactive terminal machine and perform result determination;

[0199] The automobile data acquisition front-end machine includes, in sequence, a radio frequency transmitting module, a detection panel and a data collector;

[0200] The automobile data acquisition front-end machine is electrically connected with an external automobile controller plug-in adapter port;

[0201] The radio frequency transmitting module can transmit radio frequency signals of a specified frequency band; and the radio frequency transceiver module transmits detection data to the fault detection practical training host;

[0202] The detection panel includes a plurality of wiring terminals, and each wiring terminal corresponds to a plug-in adapter port of an automobile controller;

[0203] The automobile data acquisition front-end machine further includes a data collector; the data collector is powered by a 12v or 5v power supply provided by each plug-in adapter port of the automobile controller, and needs signal optical coupling isolation or voltage isolation for signal collection.

[0204] Referring to Figures 11 to 12 The data collector comprises a detection circuit and a protection circuit; the protection circuit is arranged at the front end of the detection circuit, and comprises an input end INN0_0, an operational amplifier U18A, an operational amplifier U18B, resistors Ri1, R67, R72 and R66; the input end INN0_0 is electrically connected with a terminal of an external automobile controller connector port, the resistor Ri1 is electrically connected with the pin 3 of the operational amplifier U18A, the pin 1 of the operational amplifier U18A is electrically connected with the pin 2 of the operational amplifier U18A, the pin 1 of the operational amplifier U18A is connected with the pin 5 of the operational amplifier U18B in series through the resistor R67; the pin 6 of the operational amplifier U18B is electrically connected with the pin 7 of the operational amplifier U18B; the pin 7 of the operational amplifier U18B is connected with the detection circuit in series through the resistor R72; one end of the resistor R66 is grounded, and the other end of the resistor R66 is connected with the resistor Ri1 in series;

[0205] The protection circuit further comprises a capacitor C146, a resistor R68, a diode D1 and a resistor R75; the capacitor C146, the resistor R68 and the diode D1 are connected in parallel between the resistor Ri1 and the pin 3 of the operational amplifier U18A; one end of the capacitor C146 is connected with the resistor Ri1, and the other end of the capacitor C146 is grounded; one end of the resistor R68 is connected with the resistor Ri1, and the other end of the resistor R68 is grounded; the positive electrode of the diode D1 is grounded, and the negative electrode of the diode D1 is connected with the resistor Ri1; one end of the resistor R75 is grounded, and the other end of the resistor R75 is connected with the resistor R67 and the pin 5 of the operational amplifier U18B;

[0206] Table 1

[0207]

[0208] Table 1 is a DC-15V voltage measurement summary table.

[0209] The measurement serial numbers 1-4 in Table 1 are measurement results before the protection circuit is arranged:

[0210] ①No matter how much the input negative voltage is, the measurement result is all 15V; for example, if the input is-5V, the measurement voltage is 15V, and if the input becomes-8V, the measurement result is still 15V;

[0211] ②The input negative voltage causes the internal clamping circuit of the input voltage follower to be reversely connected, thereby causing heating damage;

[0212] ③The input negative voltage causes the current to pass through the internal clamping circuit of the voltage follower and then to the system negative power supply, thereby increasing the load of the negative power supply, eventually causing the negative power supply to overheat, and further causing the power supply to be damaged.

[0213] The measurement serial numbers 5-8 in Table 1 are measurement results after the protection circuit is arranged:

[0214] ①Shield negative voltage, regardless of the negative voltage, the measurement result is 0V;

[0215] ②The input voltage is negative, the current directly passes through the diode and the resistor, and does not flow through the voltage follower, avoiding damage to the voltage follower; the voltage follower is in a normal temperature state.

[0216] ③The current does not flow through the voltage follower, further protecting the negative power supply; the negative power supply is in a normal temperature state.

[0217] Referring to Figure 12 , the automobile data acquisition front-end machine further comprises a ground connection line connected at one end with the protection circuit R66 and at the other end with the negative pole of the external automobile storage battery; the setting of the ground connection line can ensure that the automobile controller and the automobile data acquisition front-end machine have the same reference voltage, avoiding detection errors caused by data deviation of the automobile data acquisition front-end machine, as shown in Table 2 (15V voltage measurement table of negative pole without grounding (serial numbers 1-4) and setting negative pole grounding (serial numbers 5-8)).

[0218] Table 2

[0219]

[0220] The automobile data acquisition front-end machine is used to collect signals of the control unit on the measured vehicle, and does not affect the normal operation of the original vehicle while collecting the original vehicle signals. The automobile data acquisition front-end machine is equipped with a wireless routing module. The wireless routing can encode and encrypt the collected signals and send them out, ensuring the accuracy of the data. The sending distance can reach 300 meters (and can send through the wall). Up to 76 channels of voltage data can be collected. The wireless receiving system can receive the sent wireless signals, decrypt the wireless signals, and restore the channel data through an operational amplifier. The restored number is consistent with the sending end number. Students can use a multimeter or other measurement tools to measure at the detection port. The voltage accuracy is ±0.1V, the refresh rate is 10ms, and the signal data of the original vehicle is truly replicated.

[0221] One automobile data acquisition front-end machine is connected to the vehicle through a lossless connection harness without damaging the original vehicle harness. The wireless sending end sends data through the router. The student interactive terminal (student terminal) measurement box receives data and restores the data to the measurement end. In this embodiment, up to 40 student interactive terminals can simultaneously receive data for measurement.

[0222] The fault detection training host machine can also access a fault setting box to set faults through wireless setting, mechanical, and program-controlled methods. Up to 76 faults can be set for each system.

[0223] The detection circuit comprises a collector chip; the collector chip is SCA7606; SCA7606 is a 16-bit, 8-channel synchronous sampling analog-to-digital converter chip; SCA7606 is internally provided with analog input clamping protection, a second-order anti-aliasing filter, a track-and-hold amplifier, a 16-bit charge redistribution successive approximation analog-to-digital converter, a flexible digital filter, a 2.5V reference voltage source, a reference voltage buffer and a high-speed serial and parallel interface; SCA7606 is powered by a 5V single power supply, can process ±10V and ±5V true bipolar input signals, and all channels can be sampled at a throughput rate of up to 200kSPS; the input clamping protection circuit can withstand a voltage of up to ±16.5V; regardless of the sampling frequency, the analog input impedance of SCA7606 is 1MΩ; SCA7606 works by a single power supply, has an on-chip filter and high input impedance, and thus does not require an external operational amplifier and a bipolar power supply; the 3dB cutoff frequency of the anti-aliasing filter of SCA7606 is 22.9kHz, and at a sampling rate of 200kSPS, it has an anti-aliasing suppression characteristic of 40dB; the flexible digital filter is pin-driven and can improve the signal-to-noise ratio.

[0224] The terminal machine further comprises a radio frequency receiving module, a plurality of detection signal terminals and a single-chip microcomputer which are sequentially and electrically connected to the radio frequency transceiving module; the radio frequency receiving module can receive radio frequency signals of a specified frequency band of the fault detection training host; the single-chip microcomputer can set static or dynamic signals of a plurality of nodes;

[0225] The detection signal terminals are matched with the plug-in port of the automobile controller; the external display terminals are displayed by LED dot matrix; and the terminals can detect up to 60 pins at most;

[0226] The remote interaction module comprises a touch display screen and a communication module; the remote interaction module is electrically connected with the fault detection practical host through the communication module; the touch display screen can control the fault detection practical host to switch the automobile controller to be detected; after switching the automobile controller, the PLC controller of the fault detection practical host acts to control the radio frequency transceiver module to switch to another frequency band to receive the detection data of the interaction terminal of each end practical student; the touch display screen correspondingly displays the wiring terminal arrangement drawing matched with the communication interface of the current automobile controller; the virtual simulation can display the interface of the corresponding automobile controller and perform result input and submission to the fault detection practical host for judgment. The touch display screen can collect the self-checking data and fault codes of the power battery, the driving motor, the high-voltage electric control box and the engine of the automobile through the connection of the automobile diagnosis port, integrate the key data flow and fault code information required by the automobile fault training, and display the key data flow and fault code information in the specified area (a fault area and a data flow area) of the remote interaction module. The multi-mode practical teaching method and system for new energy automobile fault detection of the application can be used for the measurement and cognition training of the teaching vehicle (after reasonable modification) around the vehicle system principle, fault diagnosis and troubleshooting, vehicle network communication and other subjects. It is an effective platform for solving the surrounding teaching of the electric control system practical training in domestic vocational education.

[0227] Referring to Figure 3 , the automobile data acquisition front-end machine collects the signals of the control unit of the measured vehicle, and collects the original vehicle signals without affecting the normal operation of the original vehicle. The automobile data acquisition front-end machine is provided with a wireless routing module. The wireless routing module can encode and encrypt the collected signals and send them out, so as to ensure the accuracy of the data. The sending distance can reach 300 meters (and the wireless signal can be sent through the wall). At most, 76 channels of voltage data can be collected. The wireless receiving system can receive the sent wireless signal, decrypt the wireless signal, restore the data of the channels through an operational amplifier, and the restored number is consistent with the number of the sending end. Students (students) can use a multimeter and other measuring tools to measure at the detection port. The voltage precision is +-0.1V, the refresh rate is 10ms, and the signal data of the original vehicle is truly copied; the embodiment of the application judges the vehicle network fault by calling the original vehicle decoding module whether it can enter the ID interface of the real vehicle controller. The flowchart of the method is specifically referred to Figures 5 to 6 .

[0228] Referring to Figures 7 to 9The controller in the car can be divided into an A area and a B area, the A area is an electronic control part of a car head, and the B area is a central control part; the car data acquisition front-end machine can be connected with the controller of the A area or the controller of the B area; for example, one car data acquisition front-end machine is connected to the car (the A area) through a lossless connection wire harness, the wireless sending end sends data through a router, the measuring box receives data and restores the data to the measuring end, and at most 40 student terminals can receive data measurement simultaneously.

[0229] The embodiment of the present application also solves the problems of low fault detection efficiency and large detection error of new energy vehicles in the prior art, the stability of system detection is improved by setting a protection circuit; by collecting real vehicle engine, motor, battery related data and vehicle body self-checking data, fault diagnosis is performed, and fault area information is provided, the fault information is synchronized to each remote interaction module and fault detection sub-control module, the students perform fault detection and judgment in the fault detection sub-control module, and the efficiency and accuracy of detection practical training are improved.

[0230] The main parameters of the specific devices and circuits of each part used in the embodiment of the present application are as follows:

[0231] 1. The car data acquisition front-end machine uses an STM32F407 chip to perform signal processor data acquisition, and each end signal uses optical coupling isolation technology to perform data isolation, so as to prevent the original car normal data work from being affected by the collected data.

[0232] 2. The car data acquisition front-end machine uses an SCA7606 car-grade chip to perform ADC conversion, the precision can reach 16bit, synchronous analog sampling, and the internal integration is 8-way high input impedance analog front end and high-precision on-chip reference voltage source.

[0233] 3. The car data acquisition front-end machine uses an 8255A car-grade chip to perform data following isolation sampling. OffsetVoltage voltage is maximum 25uV, and the reaction time is 0.7us.

[0234] 4. The car data acquisition front-end machine uses a DG408 car-grade switching chip to perform data channel conversion, and the leakage voltage is 10uV.

[0235] 5. The wireless transmission of the car data acquisition front-end machine is automatic frequency hopping, full duplex, high-speed transparent transmission, and a high-power module, the communication mode is GFSK, the working frequency band is 2.4G, the SMAK interface is bidirectional simultaneous receiving and transmitting, the automatic frequency modulation anti-jamming ability is strong, the lost data is automatically retransmitted. The transmission distance can reach 1KM.

[0236] 6, Fault detection training host has 485 communication function, can be connected with the teacher computer, convenient for teacher monitoring, control of receiving and sending data, control of receiving and sending channel switching, can control the voltage data transmission of each channel alone, data change, data increase, and synchronous display data with students.

[0237] 7, Fault detection training host built-in power switch, one-key power switch, working indicator light, data sending light (the light will flicker when sending data), charging indicator light (the light will be on when charging, and will be off when the battery is fully charged).

[0238] 8, Fault detection training host can be equipped with built-in battery, no need for external power supply, convenient for equipment use. Working voltage 24V.

[0239] 9, Fault detection training host built-in sending board is connected with the acquisition mainboard, external TE connector is used to connect the signal on the car, 4-layer board technology is adopted, mechanical integration production, double-sided original welding, and fault rate is reduced.

[0240] 10, Each interactive terminal of the training students uses STM32F407 chip to process and restore data, and uses isolation chip to prevent data from being disturbed, with high impedance.

[0241] 11, Each interactive terminal of the training students uses 5614 car-grade DAC chip to convert data, converts digital signal into analog signal, with 12bit precision and four-channel output.

[0242] 12, Each interactive terminal of the training students uses 8255B car-grade chip to isolate and restore data, with 100mv precision of restored voltage, 25uV maximum OffsetVoltage voltage, and 0.7us reaction time.

[0243] 13, Each interactive terminal of the training students is an automatic frequency hopping, full-duplex, high-speed transparent, high-power module, with communication mode of GFSK, working frequency band of 2.4G, SMAK interface, bidirectional simultaneous receiving and sending, strong anti-interference ability of automatic frequency modulation, lost data automatic retransmission function, and receiving distance up to 1KM.

[0244] 14, The 485 module of each interactive terminal of the training students can communicate with 10-inch serial port screen, can be linked with the screen, control screen display, switch circuit and other functions, and can also be connected with computer to send the received data to PC end for display of student end software.

[0245] 15, Each interactive terminal of the training students can be equipped with built-in battery, with working voltage of 24V, and can be used for more than 5 hours after one-time charging, meeting the requirements of training time.

[0246] 16. Each training student's interactive terminal has a built-in power switch, which can turn the power on and off with one button. The power indicator, the data transmission light (which flashes when data is being transmitted), and the charging indicator (which lights up when charging and turns off when fully charged) are also included.

[0247] 17. The receiving base plate of each trainee interactive terminal is connected to the receiving main board. The base plate has 80 measurement holes for easy insertion of multimeter probes. It adopts a galvanized oxidation process for durability and uses a 4-layer board process. It is produced in a mechanical integrated manner with double-sided component welding to reduce the failure rate.

[0248] 18. Each trainee's interactive terminal can simultaneously restore data from 76 channels. The voltage of each channel can be measured with a multimeter, and the restoration accuracy is within 100mV of the original vehicle.

[0249] 19. Each training student's interactive terminal is small in size and can be placed on each student's desk; in the same scenario, a maximum of 40 student receiving terminals can generally be configured.

[0250] 20. The fault detection training host software adopts existing technology and includes circuit diagrams of various systems, making it convenient for teachers to use for teaching, fault setting interface, remote management and other functions.

[0251] 21. Each fault detection training host can use wireless communication, and the signal voltage of each line will be displayed on the corresponding circuit diagram on the remote interactive module interface.

[0252] 22. Administrators can log in to the cloud server or the fault detection training host to access the fault setting function. Under this function, all schematic diagrams will not display measurement points, but green fault setting buttons will be displayed on lines that support fault generation. Clicking the fault button will allow you to set the status of the line.

[0253] The above embodiments are merely some, not all, of the embodiments of the present invention. In other embodiments, within the scope of the present invention, other similar systems, modules, structures, steps, parameters, etc., can be selected to achieve the technical effects described in the present invention, and therefore will not be listed one by one. Furthermore, based on the above embodiments of the present invention, all other modifications or alterations obtained by those skilled in the art without creative effort are within the protection scope of the claims of this application.

Claims

1. A multi-mode practical training method for fault detection in new energy vehicles, characterized in that, Includes the following steps: S1. Deploy a real-time multi-mode practical training and teaching system S1-1 first deploys a real-time multi-mode training and teaching system to simultaneously support real-time multi-mode training and teaching of one vehicle to any number of people. The multi-mode practical training system includes components interconnected and communicating via cables, the Internet of Things, or the Internet: a cloud server, a new energy vehicle, a vehicle data acquisition front-end unit, a fault detection training host, multiple on-site student interactive terminals, multiple near-field student interactive terminals, and multiple remote student interactive terminals; the fault detection training host includes a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module, and a teaching interaction module. The controller of new energy vehicles is divided into Area A and Area B according to its physical location. Area A is the front electronic control part and Area B is the central control part. The teaching modes of the real-time multi-mode practical training system include: on-site practical training mode in the practical training workshop, near-field practical training mode in the practical training workshop, centralized practical training mode in the remote classroom, and remote distributed individual practical training mode. S1-2: Install the vehicle data acquisition front-end unit into the connector port of the external new energy vehicle controller. The terminals of the vehicle data acquisition front-end unit and the connector port of the external vehicle controller are electrically connected. After the vehicle data acquisition front-end unit is working normally, debug and configure the communication between the fault detection training host and the vehicle data acquisition front-end unit to realize the normal transmission of the acquired data. The vehicle data acquisition front-end unit detects the data through the detection circuit, generates detection data, and transmits the detection data to the fault detection training host. S2. Obtain test data for new energy vehicles. S2-1: Acquisition of Detection Data After the vehicle data acquisition front-end machine generates detection data, the PLC controller of the fault detection training host communicates with the vehicle data acquisition front-end machine to transmit the detection data to the fault detection training host; the radio frequency transceiver module of the fault detection training host is switched to a specified frequency band, and the fault detection training host can receive the radio frequency signal transmitted by the vehicle data acquisition front-end machine in the same frequency band. The PLC controller processes and identifies the model of the vehicle controller and stores the detection data. S2-2: Verification of Detection Data The PLC controller verifies the acquired detection data against the original data stored in the fault detection training host. The original data is the detection data when the external car controller is working normally. If there is an anomaly in the preliminary detection data, the abnormal part of the data is marked as abnormal data, and the abnormal data is confirmed and stored. S3. New energy vehicle fault detection training data generation, the fault setting box has multiple built-in lines that connect to the vehicle's A or B zone controller; S3-1 New Energy Vehicle Fault Settings The fault setting box is electrically connected to the PLC controller. The fault setting box has multiple built-in lines, each of which is matched with the terminal of the connector port of the external vehicle A or B zone controller. Each line is connected in series with a programmable switch, which controls the on / off state of the line. Each programmable switch is electrically connected to the PLC controller, which can control the state of each programmable switch according to the settings, thereby setting the on / off state of multiple lines. S3-2, Generation of Training Data for Detection Status The PLC controller acquires the abnormal data in step S2 and combines it with the on / off state set in step S3-1 to generate and store detection status data. S4. Generation of Training Data for Detection Status S4-1, Synchronous detection of status data and remote interaction The PLC controller reads the detection status data, and the fault detection training host synchronizes the detection status data to the interactive terminals of each trainee. It also synchronizes the terminal indicator diagram of the corresponding external automotive controller connector port to the remote interaction module. The trainees perform data detection on the terminals of each trainee's interactive terminal according to the instructions on the remote interaction module interface. S4-2 Uploading of Training Trainee Test Results According to the instructions on the remote interactive module interface, the terminal trainees perform fault detection and judgment training operations, and submit the detection results data they judge to the fault detection training host through their interactive terminals, or directly to the cloud server via the network. Then they wait for the fault detection training host or cloud server to judge and provide feedback on the trainee's detection training operation results. S5. Interactive training management for each trainee's interactive terminal operation and fault detection in new energy vehicles. S5-1 Test Result Submission and Practical Training Process Feedback According to the multimedia testing instructions of the remote interaction module, the terminal trainees test each terminal of their interactive terminal and record the test results in the designated location of the remote interaction module. After all tests are completed, the trainees submit the data to the fault detection training host or cloud server through the remote interaction module. The fault detection training host or cloud server judges and provides feedback on the test results and uploads the data on whether the training operation of each trainee terminal is correct to the cloud server. Cloud servers enable unified management and resource sharing across multiple sites and terminals, while virtual simulation technology provides a real-time fault detection simulation environment.

2. The multi-mode practical training method for fault detection of new energy vehicles according to claim 1, characterized in that, In step S1-1, the interactive terminal for on-site trainees, the interactive terminal for near-field trainees, and the interactive terminal for remote trainees all have the same structure, and all include: a remote interaction module and a fault detection and control module. The cloud server and multiple remote training student interactive terminals are all remotely deployed. The cloud server communicates with the fault detection training host through the network, and the multiple remote training student interactive terminals communicate with the cloud server through the network.

3. The multi-mode practical training method for fault detection of new energy vehicles according to claim 1, characterized in that, Step S2 further includes the following steps: For wired acquisition of detection data, connect one end of the vehicle controller cable to the connector port of the vehicle data acquisition front-end unit, and the other end to the fault detection training host. In the event of abnormal wireless acquisition of detection data: When the fault detection training host fails to communicate with the vehicle data acquisition front-end unit multiple times, the PLC controller reads the communication data of the vehicle data acquisition front-end unit through the vehicle controller connection cable. The PLC controller processes and identifies the model of the vehicle controller and stores the detection data.

4. The multi-mode practical training method for fault detection of new energy vehicles according to claim 1, characterized in that, Step S2 further includes the following steps: Automatic data verification: The PLC controller compares and analyzes the acquired detection data with the original data stored in the fault detection training host. If there is a difference, the PLC controller will mark the data as abnormal data and mark the abnormal terminal number. Data cable data verification involves manually measuring the terminals on the detection panel of the vehicle data acquisition front-end unit based on the marked abnormal terminal numbers. After measurement, the data is manually corrected, and the abnormal terminal numbers are marked. Data verification involves confirming and storing the serial numbers of the terminals marked as abnormal.

5. The multi-mode practical training method for fault detection of new energy vehicles according to claim 1, characterized in that, Step S4 further includes the following steps: Each training student interactive terminal includes a microcontroller, multiple wiring terminals that match the connector ports of an external automotive controller, and wiring terminal numbers. The microcontroller sets static or dynamic signals of multiple matching nodes to designated terminals based on the received detection status data. The PLC controller synchronizes the terminal block diagram of the connector port of the matching automotive controller to the remote interaction module, and the interface of the remote interaction module displays the terminal block diagram of the corresponding external automotive controller connector port.

6. The multi-mode practical training method for fault detection of new energy vehicles according to claim 1, characterized in that, Step S5 further includes the following steps: After receiving the detection results submitted by the remote interaction module, the fault detection training host or cloud server will judge the results and display them to the remote interaction module; if the detection results are incorrect, they will be fed back to the remote interaction module to prompt the terminal trainees to re-test. The cloud server's built-in program maps the training operation process of each student's terminal to the student's account, and distributes it to each student through the fault detection training host and the interactive terminals of each training student, prompting them to correct the wrong operation. Finally, the cloud server's built-in program summarizes and records the training operation process of each student and gives the corresponding score.

7. A fault detection system for remote training and teaching of new energy vehicles, characterized in that, The multi-mode practical training method for implementing the fault detection of new energy vehicles according to any one of claims 1-6 includes the following components working in concert: Cloud server, new energy vehicle, vehicle data acquisition front-end machine, fault detection training host, multiple on-site training student interactive terminals, multiple near-field training student interactive terminals, and multiple remote training student interactive terminals; The controller of the new energy vehicle is divided into area A and area B according to its physical location. Area A is the front electronic control part and area B is the central control part. The vehicle data acquisition front-end unit includes an RF transmission module, a detection panel, and a data acquisition unit; the vehicle data acquisition front-end unit can be selectively connected to the connector port of the A zone or B zone controller of the new energy vehicle, and the terminals of the vehicle data acquisition front-end unit and the connector port of the external vehicle controller are electrically connected. The fault detection training host includes: a PLC controller, a WIFI module, a Bluetooth module, a radio frequency transceiver module, and a teaching interaction module; the PLC controller includes a network adapter, and the network controller is connected to a wired and / or wireless network; The fault detection training host also includes: a car controller connection cable; one end of the car controller connection cable is connected to the connector port of the car data acquisition front-end unit, and the other end is connected to the input interface of the fault detection training host; the fault detection training host communicates with the car data acquisition front-end unit through the car controller connection cable to realize the acquisition and verification of detection data; and controls the fault setting box to set faults; the fault detection training host synchronizes the detection data to the interactive terminals of the trainees at each end through radio frequency signals; The fault setting box is electrically connected to the PLC controller. The fault setting box has multiple built-in lines, each of which is matched with the terminal of the connector port of the external vehicle A or B zone controller. Each line is connected in series with a programmable switch, which controls the on / off state of the line. Each programmable switch is electrically connected to the PLC controller, which can control the state of each programmable switch according to the settings, thereby setting the on / off state of multiple lines. The on-site training student interactive terminal, near-field training student interactive terminal, and remote training student interactive terminal all have the same structure, and all include: a remote interaction module and a fault detection and control module. New energy vehicles, automotive data acquisition front-end machines, fault detection training hosts, and multiple on-site trainee interactive terminals are deployed in the training workshop; the multiple on-site trainee interactive terminals communicate with the fault detection training host via WIFI or Bluetooth. Multiple near-field training student interactive terminals are deployed in the near-field of the training workshop, and use RF communication to communicate with the fault detection training host. The cloud server and multiple remote training student interactive terminals are all remotely deployed. The cloud server communicates with the fault detection training host through the network, and the multiple remote training student interactive terminals communicate with the cloud server through the network.

8. The fault detection system for remote training and teaching of new energy vehicles according to claim 7, characterized in that, The vehicle data acquisition front-end unit includes, in sequence, a radio frequency transmission module, a detection panel, and a data acquisition unit; The vehicle data acquisition front-end unit is electrically connected to the external vehicle controller connector port; The radio frequency (RF) transmitting module can transmit RF signals in a specified frequency band; the RF transceiver module transmits the detection data to the fault detection training host. The detection panel includes multiple terminals, each corresponding to a connector port of the vehicle controller; the data acquisition unit is powered by the 12V or 5V power supply provided by the connector port of each vehicle controller, and the acquisition requires optical or transformer isolation of the signal. The vehicle data acquisition front-end unit also includes a grounding connection wire with one end connected to the protection circuit R66 and the other end connected to the negative terminal of the external vehicle battery; the detection circuit includes a data acquisition chip, the data acquisition chip model being SCA7606.

9. The fault detection system for remote training and teaching of new energy vehicles according to claim 7, characterized in that, It also includes a protection circuit, which comprises: an input terminal INN0_0, operational amplifier U18A, operational amplifier U18B, and resistors Ri1, R67, R72, and R66. The input terminal INN0_0 is electrically connected to the corresponding terminal of the external automotive controller connector. Resistor Ri1 is electrically connected to pin 3 of operational amplifier U18A. Pins 1 and 2 of operational amplifier U18A are electrically connected. Pin 1 of operational amplifier U18A is connected to pin 5 of operational amplifier U18B after being connected in series with resistor R67. Pins 6 and 7 of operational amplifier U18B are electrically connected. Pin 7 of operational amplifier U18B is connected to a detection circuit after being connected in series with resistor R72. One end of resistor R66 is grounded, and the other end is connected in series with resistor Ri1. The protection circuit also includes: capacitor C146, resistor R68, diode D1, and resistor R75; capacitor C146, resistor R68, and diode D1 are connected in parallel between resistor Ri1 and pin 3 of operational amplifier U18A. One end of capacitor C146 is connected to resistor Ri1, and the other end is grounded; one end of resistor R68 is connected to resistor Ri1, and the other end is grounded; the positive terminal of diode D1 is grounded, and the negative terminal is connected to resistor Ri1; one end of resistor R75 is grounded, and the other end is connected to resistor R67 and pin 5 of operational amplifier U18B.

10. The fault detection system for remote training and teaching of new energy vehicles according to claim 7, characterized in that, The remote interaction module includes a touch screen and a communication module. The remote interaction module is electrically connected to the fault detection training host through the communication module. The touch screen can control the fault detection training host to switch the vehicle controller to be tested. After switching the vehicle controller, the PLC controller of the fault detection training host activates and controls the radio frequency transceiver module to switch to another frequency band to receive the detection data from the interactive terminals of other trainees. The touch screen displays the corresponding wiring diagram of the communication interface matching the current vehicle controller. The virtual simulation can display the interface of the corresponding car controller and input and submit the results to the fault detection training host for judgment.

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