CN113092130A - Method for simulating conformance test of electric automobile and vehicle-mounted terminal - Google Patents
Method for simulating conformance test of electric automobile and vehicle-mounted terminal Download PDFInfo
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Abstract
The invention aims to provide a method for simulating a conformance test of an electric vehicle and a vehicle-mounted terminal, so as to improve the detection efficiency, the safety passing rate and the detection passing rate of the conformance test of the vehicle. The method for simulating the conformance test of the electric automobile is applied to a vehicle-mounted terminal carried on the electric automobile to be tested, and comprises the following steps: receiving a simulated condition type request sent by simulated condition instruction sending equipment; selecting a data input source for generating a test working condition signal based on the simulation working condition type request; the data input source of the test working condition signal is real data collected from a vehicle CAN network or injected simulation data; generating a test working condition signal required by the simulation working condition type based on the data input source of the selected test working condition signal; and performing conformance testing based on the testing working condition signal.
Description
Technical Field
The invention relates to a method for simulating a compliance test of an electric automobile and a vehicle-mounted terminal, in particular to a method for simulating relevant working conditions in the vehicle compliance test related to GB/T32960.2-2016 electric automobile remote service and management system technical specification (hereinafter referred to as the specification).
Background
With the increasing popularization of new energy automobiles in China, the state has come out of relevant specifications to monitor the critical parameters of the vehicles in real time so as to master the running states of the vehicles. Therefore, before each vehicle type is on the market, the vehicle compliance test must be completed according to the vehicle compliance test steps of the country or the local platform based on the specifications. In the vehicle compliance testing process, technicians are required to complete a series of operation effects which are possibly generated under specific conditions according to a set time rhythm so as to verify that relevant mechanisms and functions of a vehicle and a remote vehicle-mounted monitoring terminal (hereinafter referred to as a vehicle-mounted terminal) meet the specifications. However, the operation of the vehicle and the vehicle-mounted terminal is relatively stable, abnormal working conditions are not easy to generate, unless the relevant interference factors exceed the allowed range. In the actual vehicle conformance test, if the relevant mechanism and function of the vehicle-mounted terminal are triggered by manufacturing a real working condition, firstly, the implementation difficulty is high, the stability of the working condition is difficult to guarantee, and secondly, safety risks exist, such as manufacturing of three-level faults and the like. Therefore, the occurrence of real working conditions such as disconnection and connection of communication, three-level fault triggering of the whole vehicle and the like can be simulated by a specific method, and convenience in operation, efficiency improvement and safety guarantee can be guaranteed.
Disclosure of Invention
The invention aims to provide a method for simulating a conformance test of an electric vehicle and a vehicle-mounted terminal, so as to improve the detection efficiency, the safety passing rate and the detection passing rate of the conformance test of the vehicle.
The technical scheme of the invention is as follows:
the embodiment of the invention provides a method for simulating conformance testing of an electric automobile, which is applied to a vehicle-mounted terminal carried on the electric automobile to be tested, and comprises the following steps:
receiving a simulated condition type request sent by simulated condition instruction sending equipment;
selecting a data input source for generating a test working condition signal based on the simulation working condition type request; the data input source of the test working condition signal is real data collected from a vehicle CAN network or injected simulation data;
generating a test working condition signal required by the simulation working condition type based on the data input source of the selected test working condition signal;
and performing conformance testing based on the testing working condition signal.
Preferably, the method further comprises:
and when the data source of the test working condition signal is injected simulation data, caching real data acquired from a vehicle CAN network.
Preferably, the real data obtained from the vehicle CAN network includes: primary sampling data acquired at a fixed period and secondary sampling data acquired at an indefinite period.
Preferably, before receiving the simulated condition type request sent by the simulated condition instruction sending device, the method further includes:
collecting real data from a vehicle CAN network;
carrying out consistency check and rationality check on the acquired real data;
and when the consistency check and/or the rationality check are not passed, feeding back an abnormal result to the simulated working condition instruction sending equipment.
An embodiment of the present invention further provides a vehicle-mounted terminal, including: the system comprises a real data acquisition module for acquiring the CAN data of the whole vehicle, a real data analysis module for analyzing the CAN data of the whole vehicle, a simulation instruction receiving and sending module for connecting with a simulation working condition instruction sending device, a simulation instruction analysis module connected with the simulation instruction receiving and sending module, an internal signal management module connected with the simulation instruction analysis module and the real data analysis module, and an internal signal application module connected with a vehicle-mounted service platform and the internal signal management module; wherein the internal signal management module comprises: the receiving unit is used for receiving a simulated condition type request sent by a simulated instruction analyzing module, the simulated condition type request is sent to the simulated instruction transceiving module by simulated condition instruction sending equipment and is analyzed by the simulated instruction analyzing module;
the data input source selection unit is used for selecting a data input source for generating a test working condition signal based on the simulation working condition type request; the data input source of the test condition signal is real data acquired from a vehicle CAN network or injected simulation data;
the test working condition signal generating unit is used for generating a test working condition signal required by the simulation working condition type based on the selected data input source of the test working condition signal;
and the internal signal application module is used for carrying out a conformance test based on the test working condition signal.
Preferably, the in-vehicle terminal further includes:
the simulation instruction communication protocol stack module is used for realizing the communication between the simulation instruction receiving and sending module and the simulation instruction analysis module;
and the simulation working condition preprocessing and post-processing module is respectively connected with the simulation instruction communication protocol stack module, the internal signal management module and the internal signal application module through control signal lines.
The invention has the beneficial effects that:
before the electric automobile is connected to a national monitoring platform of a new energy automobile for conformance testing, a method for simulating conformance testing of the electric automobile is designed, defects or leaks which do not meet national standards and standard requirements can be detected in advance, and the detection efficiency, the safety passing rate and the detection passing rate of the electric automobile when the electric automobile is connected to the national monitoring platform of the new energy automobile for conformance testing are improved by reasonably adjusting and modifying the design.
Drawings
FIG. 1 is a schematic diagram of connection between a vehicle-mounted terminal and a finished vehicle CAN network;
FIG. 2 is a schematic diagram of a system for simulating a compliance test condition of an electric vehicle at a vehicle-mounted terminal;
FIG. 3 is a schematic diagram of a real condition data collection and analysis process;
fig. 4 is a schematic diagram illustrating interaction between a simulated condition command device and a remote terminal.
Detailed Description
In order to further illustrate the features of the present invention, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.
As shown in fig. 1, the connection mode of the vehicle-mounted terminal in the entire vehicle system of the electric vehicle is specifically as follows: and the vehicle-mounted terminal is directly or indirectly connected to the CAN network to be monitored according to the requirement so as to achieve the purpose of collecting data transmitted on each CAN network.
Further, after the whole vehicle is powered on, the vehicle-mounted terminal is awakened by the whole vehicle to work. After the simulated working condition instruction sending equipment is powered on, connection with the vehicle-mounted terminal is actively established, and specifically, the simulated working condition instruction sending equipment is selectively connected with the vehicle-mounted terminal in a wired mode (such as CAN) or in a wireless mode (such as WIFI) according to a communication medium. After establishing the communication connection between the simulated condition instruction transmitting device and the vehicle-mounted terminal, the vehicle is ready for a compliance test.
As shown in fig. 2, the processing modules in the in-vehicle terminal establish corresponding connection relationships, and the functions and input/output descriptions of the modules are as described in steps S1-S8.
S1, a real data acquisition module: the module collects all CAN messages transmitted by the CAN network of the whole vehicle in an interruption mode and takes the collected CAN messages as input. Specifically, the real data acquisition module periodically samples and acquires all original messages transmitted on the entire vehicle CAN network, wherein the module firstly performs primary message acquisition according to a fixed 1s period, performs secondary message acquisition with a variable period on the basis of the primary message acquisition, and outputs and transmits data sampled twice to a subsequent real data analysis module. The purpose of the first message sampling is to ensure that the sampled data can meet the requirement of the lowest frequency and reduce the operation load when the vehicle has three-level faults and needs to trace back real data ahead. The purpose of the second message sampling is to ensure that the sampling is carried out within 30s or less when the vehicle has no three-level fault.
S2, a real data analysis module: the module takes the output of the real data acquisition module as input, and analyzes the CAN message acquired by the real data acquisition module according to the whole vehicle protocol to obtain a signal output value for subsequent signal application modules to process and use.
S3, an internal signal management module: the module is responsible for automatically generating partial test working condition signals, such as fault signals of plates such as a battery, a motor and the like, and changing according to a required rule; the module is responsible for the front-end updating switching control of the data source before generating the test working condition signal, namely, the input source of the data generating the test working condition signal is controlled, and the specific test working condition signal can be input and updated by selecting the acquired real data or automatically generated test working condition signal data in the module as input; the module is responsible for carrying out consistency check on real data obtained by analyzing the real data analyzing module, and because fault codes and fault grades need to correspond and the like, certain logic relations among the real data need to meet national standard requirements, and the module can be used for calculating and ensuring consistency of the fault codes and the fault grades of the collected real data; the module is responsible for carrying out exception handling on the real data, namely whether the real data analyzed by the real data analysis module is abnormal or not is detected, whether the real data is reasonable or not is detected, if the real data is abnormal, prompt information is sent to an external vehicle service platform, the condition that the conformity detection is not passed due to the abnormal data is avoided, the problem is found in time, and the passing rate of the conformity test is improved; the module is responsible for synchronously updating and outputting the generated test condition signals to the internal signal application module at the rear end.
S4, internal signal application module: the internal signal application module refers to a set of other modules of the vehicle-mounted terminal and is responsible for realizing other vehicle-mounted terminal functions related to the national standard and requirements.
S5, a simulation instruction transceiving module: the module is responsible for receiving and sending simulation working condition instruction data, wherein a data link layer protocol and a network transmission layer protocol of transmission modes (CAN, UART and Ethernet) are carried.
S6, simulating an instruction communication protocol stack module: the module is based on a simulation instruction receiving and sending module and is responsible for realizing the service layer interactive logic of simulation working condition instruction sending equipment and a vehicle-mounted terminal, and mainly comprises a CAN-based CCP protocol, an Ethernet-based XCP protocol and a custom protocol based on UART and other communication media.
S7, a simulation instruction analysis module: the module is used for analyzing the simulated working condition instruction data received and transmitted by the simulated instruction receiving and transmitting module to obtain data which can be identified by the internal signal management module.
S8, a simulation working condition preprocessing and post-processing module: the module is responsible for the running environment configuration and the function boundary preprocessing caused by the switching of real data and simulation data, and mainly comprises the following steps: firstly, when an internal data source for generating a test condition signal is switched from real data to a test condition signal data source as input data, if the real data is cached but not processed, unexpected influence is caused on the subsequent generation of an analog signal, so that the real data which is still cached needs to be processed; secondly, because various reissue functions of compliance detection specified in the national standard may acquire reissue data from the NVM storage device, and the reissue data are real data, the reissue data stored in the NVM storage device and data sources thereof also need to be preprocessed; after the simulated working condition instruction sending equipment exits the simulated working condition request, the simulated working condition preprocessing and post-processing module needs to switch an internal data source to real data to be used as data source input; and fourthly, the simulation working condition preprocessing and post-processing module needs to perform post-processing on data of the running environment such as the internal cache of the vehicle-mounted terminal, the NVM (non-volatile memory) equipment and the like during the execution of the simulation conformance test, so that the vehicle-mounted terminal can correctly run according to the logic of the real working condition of the vehicle after exiting the simulation conformance test.
Specifically, fig. 3 illustrates in detail the flow of the actual message collection and parsing: the vehicle-mounted terminal receives all original messages corresponding to the CAN network in an interruption mode, establishes a batch of buffer queues with the depth of 1 for the messages, performs caching in an FIFO mode, realizes sampling with a first fixed period of 1s by matching with the frequency of data reading, analyzes the sampled data according to the whole vehicle CAN protocol after the sampling is completed to obtain a real working condition signal, then performs sampling with a period not more than 30s, and transmits the real working condition signal to a subsequent module for application.
Fig. 4 illustrates in detail an interaction mechanism of the simulated condition instruction transmitting device and the vehicle-mounted terminal, such as a CAN-based CCP protocol: the simulated condition instruction sending equipment sends a Command Receiving Object (CRO) to the vehicle-mounted terminal, wherein the CRO comprises a command code, a command serial number and a command parameter, the vehicle-mounted terminal receives and analyzes the command, immediately replies a command return message (CRM-DTO) to the simulated condition instruction sending equipment, and the vehicle-mounted terminal executes corresponding simulated condition signal transmission according to the predefined command and the predefined parameter. If the vehicle-mounted terminal has a message to actively send the message to the simulation condition instruction sending device, the Data is transmitted upwards through a DAQ Mode (Data Acquisition Mode).
According to the measures of the embodiment of the invention, the method for simulating the conformance test of the electric automobile is designed before the electric automobile is accessed to the national monitoring platform of the new energy automobile for the conformance test, so that the defects or loopholes which do not meet the national standard and the standard requirements can be detected in advance, and the detection efficiency, the safety passing rate and the detection passing rate of the vehicle when the vehicle is accessed to the national monitoring platform of the new energy automobile for the conformance test can be improved by reasonably adjusting and modifying the design.
Claims (6)
1. A method for simulating conformance testing of an electric automobile is applied to a vehicle-mounted terminal carried on the electric automobile to be tested, and is characterized by comprising the following steps:
receiving a simulated condition type request sent by simulated condition instruction sending equipment;
selecting a data input source for generating a test working condition signal based on the simulation working condition type request; the data input source of the test working condition signal is real data collected from a vehicle CAN network or injected simulation data;
generating a test working condition signal required by the simulation working condition type based on the data input source of the selected test working condition signal;
and performing conformance testing based on the testing working condition signal.
2. The method of claim 1, further comprising:
and when the data source of the test working condition signal is injected simulation data, caching real data acquired from a vehicle CAN network.
3. The method of claim 1, wherein the real data obtained from the vehicle CAN network comprises: primary sampling data acquired at a fixed period and secondary sampling data acquired at an indefinite period.
4. The method of claim 1, wherein prior to receiving the simulated condition type request from the simulated condition command sending device, the method further comprises:
collecting real data from a vehicle CAN network;
carrying out consistency check and rationality check on the acquired real data;
and when the consistency check and/or the rationality check are not passed, feeding back an abnormal result to the simulated working condition instruction sending equipment.
5. A vehicle-mounted terminal characterized by comprising: the system comprises a real data acquisition module for acquiring the CAN data of the whole vehicle, a real data analysis module for analyzing the CAN data of the whole vehicle, a simulation instruction receiving and sending module for connecting with a simulation working condition instruction sending device, a simulation instruction analysis module connected with the simulation instruction receiving and sending module, an internal signal management module connected with the simulation instruction analysis module and the real data analysis module, and an internal signal application module connected with a vehicle-mounted service platform and the internal signal management module; wherein the internal signal management module comprises: the receiving unit is used for receiving a simulated condition type request sent by a simulated instruction analyzing module, the simulated condition type request is sent to the simulated instruction transceiving module by simulated condition instruction sending equipment and is analyzed by the simulated instruction analyzing module;
the data input source selection unit is used for selecting a data input source for generating a test working condition signal based on the simulation working condition type request; the data input source of the test condition signal is real data acquired from a vehicle CAN network or injected simulation data;
the test working condition signal generating unit is used for generating a test working condition signal required by the simulation working condition type based on the selected data input source of the test working condition signal;
and the internal signal application module is used for carrying out a conformance test based on the test working condition signal.
6. The in-vehicle terminal according to claim 5, wherein the in-vehicle terminal further comprises:
the simulation instruction communication protocol stack module is used for realizing the communication between the simulation instruction receiving and sending module and the simulation instruction analysis module;
and the simulation working condition preprocessing and post-processing module is respectively connected with the simulation instruction communication protocol stack module, the internal signal management module and the internal signal application module through control signal lines.
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