CN116506251A - Analysis method and medium of event data recording system data based on bench test - Google Patents
Analysis method and medium of event data recording system data based on bench test Download PDFInfo
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- CN116506251A CN116506251A CN202310752266.0A CN202310752266A CN116506251A CN 116506251 A CN116506251 A CN 116506251A CN 202310752266 A CN202310752266 A CN 202310752266A CN 116506251 A CN116506251 A CN 116506251A
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- 230000001133 acceleration Effects 0.000 claims description 125
- 230000006870 function Effects 0.000 claims description 31
- 230000007306 turnover Effects 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 16
- 230000001960 triggered effect Effects 0.000 claims description 10
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- 238000013461 design Methods 0.000 claims description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention relates to the field of data processing, and discloses a method and a medium for analyzing event data recording system data based on bench test. The method comprises the following steps: simulating a vehicle-mounted network and a target communication harness of a target vehicle on a test bench, installing an EDR on the test bench, and performing communication connection with the vehicle-mounted network simulated on the test bench through the target communication harness simulated on the test bench; starting a test bed to control a vehicle-mounted network simulated on the test bed to transmit a signal with a preset value to the EDR through a target communication wire harness; reading data recorded by EDR, and comparing the data with the preset numerical value to determine the corresponding relation between the physical quantity and the position; and determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation. The invention realizes the accurate analysis of the data of the event data recording system and provides a basis for recovering accidents.
Description
Technical Field
The invention relates to the field of data processing, in particular to a bench test-based analysis method and medium of event data recording system data.
Background
EDR (Event Data Recorder System, event data recording coefficient) is a device integrated inside a vehicle airbag control module for recording dynamic time series data before, during and after a collision. The system can record the main running state, the motion parameters and the conditions of controlling and using the vehicle by a driver before and after an accident, such as the speed and acceleration change before the collision, the brake pedal state, the service condition of a safety belt and the like.
The system hardware of the EDR is composed of a sensor, a processor, a storage unit, a standby power supply and other modules, and is used for monitoring and collecting data, processing the data, storing the data and guaranteeing the self-power supply capability. From the structure, the EDR hardware part mainly comprises a main control chip (MCU), a power supply module, a storage module, a sensing module and the like. The sensor is responsible for data acquisition (the data comprise the speed, acceleration, driver safety belt state, steering signal switch state, brake pedal position and the like of the vehicle), the main control chip analyzes and compresses the acquired state information and then writes the acquired state information into the storage unit, and real-time data is received and sent through the automobile CAN data bus. After the accident occurs, the data recorded by the EDR can be analyzed to restore the key information such as the state, the speed, the operation behavior of the driver and the like of the vehicle before the accident occurs, and the accident reconstruction is carried out.
In view of this, the present invention has been made.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a medium for analyzing data of an event data recording system based on a bench test, which realize accurate analysis of the data of the event data recording system and provide a basis for recovering accidents.
The embodiment of the invention provides a method for analyzing event data recording system data based on bench test, which comprises the following steps:
simulating a vehicle-mounted network and a target communication harness of a target vehicle on a test bench, wherein the vehicle-mounted network communicates with an EDR (vehicle-mounted event data recording) system through the vehicle-mounted target communication harness on a real vehicle of the target vehicle;
the EDR is installed on an accelerating device and/or a turnover device on the test bed and is in communication connection with a vehicle-mounted network simulated on the test bed through a target communication wire harness simulated on the test bed;
the acceleration device is controlled to accelerate according to a first set acceleration level and/or the turnover device is controlled to turnover according to a first set turnover acceleration level so as to drive the EDR to move through the acceleration device and/or the turnover device, and meanwhile, a vehicle-mounted network simulated on a test bench is controlled to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR, wherein the first set acceleration, the first set turnover acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR;
Comparing the first data with the first preset value, and comparing the first data with the first set acceleration and/or the first set flip acceleration to determine a source of data recorded by the EDR when a data recording function of the EDR is triggered, wherein the source comprises data collected by a sensor in the EDR and/or data transmitted to the EDR through a target communication harness;
when determining that the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, controlling a vehicle-mounted network simulated on the test bench to transmit a signal meeting a set numerical value condition to the EDR through the target communication wire harness, enabling the signal meeting the set numerical value condition to meet the condition for triggering the data recording function of the EDR, reading second data recorded by the EDR, comparing the second data with the numerical value of the signal meeting the set numerical value condition, determining the position of the physical quantity represented by the signal meeting the set numerical value condition in the second data, and establishing the corresponding relation between the physical quantity and the position;
when the source of the data recorded by the EDR is the data acquired by a sensor in the EDR, controlling the accelerating device to accelerate according to a second set acceleration level and/or controlling the overturning device to overturn according to a second set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, wherein the second set acceleration and the second set overturning acceleration meet the condition of triggering the data recording function of the EDR, reading third data recorded by the EDR, comparing the third data with the second set acceleration and/or the second set overturning acceleration to determine the position of the numerical value of the horizontal acceleration in the third data, and/or determining the position of the numerical value of the overturning acceleration in the third data, and establishing the corresponding relation between the horizontal acceleration and the position and/or the corresponding relation between the overturning acceleration and the position;
And determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
The embodiment of the invention provides a bench test-based analysis device for event data recording system data, which comprises the following components:
the simulation module is used for simulating a vehicle-mounted network and a target communication wire harness of the target vehicle on the test bench, wherein the vehicle-mounted network on the real vehicle of the target vehicle communicates with the vehicle-mounted event data recording system EDR through the vehicle-mounted target communication wire harness;
the installation module is used for installing EDR on the accelerating device and/or the turnover device on the test bench and carrying out communication connection with the vehicle-mounted network simulated on the test bench through the target communication wire harness simulated on the test bench;
the first control module is used for controlling the accelerating device to accelerate according to a first set acceleration level and/or controlling the overturning device to overturn according to a first set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, and simultaneously controlling a vehicle-mounted network simulated on the test bench to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR, wherein the first set acceleration, the first set overturning acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR;
The source determining module is used for comparing the first data with the first preset value and comparing the first data with the first set acceleration and/or the first set turning acceleration so as to determine the source of the data recorded by the EDR when the data recording function of the EDR is triggered, wherein the source comprises the data collected by a sensor in the EDR and/or the data transmitted to the EDR through a target communication wire harness;
the second control module is used for controlling a vehicle-mounted network simulated on the test bench to transmit signals meeting set numerical conditions to the EDR through the target communication wire harness when determining that the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, the signals meeting the set numerical conditions meet the conditions for triggering the data recording function of the EDR at the same time, reading the second data recorded by the EDR, comparing the second data with the numerical values of the signals meeting the set numerical conditions to determine the positions of the physical quantities represented by the signals meeting the set numerical conditions in the second data, and establishing the corresponding relation between the physical quantities and the positions;
the third control module is used for controlling the accelerating device to accelerate according to a second set acceleration level and/or controlling the overturning device to overturne according to a second set acceleration when determining that the source of the data recorded by the EDR is the data acquired by the sensor in the EDR, so as to drive the EDR to move through the accelerating device and/or the overturning device to obtain third data recorded by the EDR, wherein the second set acceleration and the second set overturning acceleration meet the condition of triggering the data recording function of the EDR, the third data recorded by the EDR are read, the third data are compared with the second set acceleration and/or the second set overturning acceleration, so that the position of the numerical value of the horizontal acceleration in the third data is determined, the position of the numerical value of the overturning acceleration in the third data is determined, the corresponding relation between the horizontal acceleration and the position is established, and/or the corresponding relation between the overturning acceleration and the position is established;
And the analysis module is used for determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
The embodiment of the invention provides electronic equipment, which comprises:
a processor and a memory;
the processor is configured to execute the method for analyzing the data of the bench test-based event data recording system according to any of the embodiments by calling the program or the instructions stored in the memory.
An embodiment of the present invention provides a computer-readable storage medium storing a program or instructions for causing a computer to execute the steps of the method for analyzing data of the bench test-based event data recording system according to any of the embodiments.
The invention provides a method for analyzing data of an event data recording system based on a bench test, which realizes accurate analysis of the data of the event data recording system and provides a basis for recovering accidents, and the method is realized by the following technical means: simulating a vehicle-mounted network and a target communication harness of a target vehicle on a test bench, wherein the vehicle-mounted network communicates with an EDR (vehicle-mounted event data recording) system through the vehicle-mounted target communication harness on a real vehicle of the target vehicle; the EDR is installed on an accelerating device and/or a turnover device on the test bed and is in communication connection with a vehicle-mounted network simulated on the test bed through a target communication wire harness simulated on the test bed; the method comprises the steps of controlling the accelerating device to accelerate according to a first set acceleration level and/or controlling the overturning device to overturn according to a first set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, simultaneously controlling a vehicle-mounted network simulated on a test bench to transmit a signal with a first preset value to the EDR through a target communication wire harness, obtaining first data recorded by the EDR, comparing the first data with the first preset value, comparing the first data with the first set acceleration and/or the first set overturning acceleration to determine sources of data recorded by the EDR when a data recording function of the EDR is triggered, starting the test bench according to the determined data sources, triggering the EDR to record the data according to set test parameters, comparing the data recorded by the EDR with the set data, determining positions of physical quantities in the data recorded by the EDR, establishing a corresponding relation, and analyzing the EDR data to be analyzed according to the corresponding relation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for analyzing data of an event data recording system based on bench test according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.
Fig. 1 is a flowchart of a method for analyzing data of an event data recording system based on bench test according to an embodiment of the invention. Referring to fig. 1, the method for analyzing the data of the event data recording system based on the bench test specifically includes:
s110, simulating an on-board network of the target vehicle and a target communication wire harness on the test bench.
The on-board vehicle network of the target vehicle communicates with the on-board event data recording system EDR through an on-board target communication harness.
And S120, installing EDR on the accelerating device and/or the turnover device on the test bed, and carrying out communication connection with the vehicle-mounted network simulated on the test bed through the target communication wire harness simulated on the test bed.
S130, controlling the accelerating device to accelerate according to a first set acceleration level and/or controlling the overturning device to overturn according to a first set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, and simultaneously controlling a vehicle-mounted network simulated on the test bench to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR.
The first set acceleration, the first set turning acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR, in other words, when the EDR detects the first set acceleration, the first set turning acceleration or the signal of the first preset value, the data recording function of the EDR is activated, and the EDR starts to record data. In particular, on real vehicles, the on-board network constantly sends signals to the EDR via the target communication harness (sensors inside the EDR also constantly detect data), but the EDR performs the recording operation only if a triggering condition is met, for example, the degree of change of acceleration reaches a threshold value, or the steering angle of the vehicle reaches a threshold value. In general terms, it is understood that EDR records only vehicle-related data of 5s before and 5s after the occurrence of a car accident.
Illustratively, the first set acceleration reaches a first threshold, the first set rollover acceleration reaches a second threshold, and the first preset value reaches a corresponding trigger threshold. Thus, when the horizontal acceleration reaching the first threshold value is acquired by the acceleration sensor in the EDR, or when the overturning acceleration reaching the second threshold value is acquired by the acceleration sensor in the EDR, or when the first preset value reaching the corresponding trigger threshold value is detected, the data recording function of the EDR is triggered.
S140, comparing the first data with a first preset value, and comparing the first data with a first set acceleration and/or a first set turning acceleration to determine the source of the data recorded by the EDR.
The sources include data collected by sensors within the EDR and/or data transmitted to the EDR via a target communication harness.
Specifically, if the first data includes the first preset value, or if a data item with the same trend as that of the first preset value exists in the first data, it is determined that the source of the data recorded by the EDR includes the data transmitted to the EDR through the target communication harness when the data recording function of the EDR is triggered.
If the first data includes the first set acceleration or the first set flip acceleration, or there is a data item in the first data that is the same as the trend of the first set acceleration or the trend of the first set flip acceleration, determining that the source of the data recorded by the EDR includes the data collected by the sensor in the EDR when the data recording function of the EDR is triggered.
By determining the source of the data recorded by the EDR when the data recording function of the EDR is triggered, the subsequent bench test can be performed pertinently according to the source, the effectiveness of the bench test and the precision and efficiency of subsequent data processing can be ensured, and the analysis efficiency and precision of the data of the EDR are further ensured.
Further, before the control transmits the signal of the first preset value to the EDR through the target communication wire harness by using the vehicle-mounted network simulated on the test bed, the method further includes:
acquiring information communicated in a target communication harness of the target vehicle;
analyzing the information to obtain physical quantities contained in the information;
and performing bench test design according to the physical quantity included in the information to obtain the signal of the first preset value.
The purpose of acquiring the information communicated in the target communication harness of the target vehicle is to determine data of which signals are sent to the EDR by the vehicle-mounted network of the target vehicle through the target communication harness, and bench test design is performed based on the determination result. For example, when determining that the vehicle-mounted network on the real vehicle transmits the data of the vehicle speed signal to the EDR through the target communication wire harness, when carrying out the bench test design, the vehicle-mounted network on the test bench should be controlled to transmit the vehicle speed signal with the preset value to the EDR on the test bench through the target communication wire harness on the test bench so as to ensure the simulation of the bench test.
The analyzing the information to obtain the physical quantity included in the information includes:
analyzing the information by using a CAN signal analysis mode to obtain physical quantities included in the information, wherein the physical quantities comprise: steering wheel angle, vehicle speed, horizontal acceleration, accelerator pedal opening, whether the passenger is in the front passenger seat, and whether the seat is fastened with one or more of the seat belts.
And S150, when the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, controlling a vehicle-mounted network simulated on the test bed to transmit signals meeting the set numerical conditions to the EDR through the target communication wire harness, reading second data recorded by the EDR, comparing the second data with the numerical values of the signals meeting the set numerical conditions to determine the positions of the physical quantities represented by the signals meeting the set numerical conditions in the second data, and establishing the corresponding relation between the physical quantities and the positions.
Wherein the signal satisfying the set numerical condition satisfies a condition for triggering a data recording function of the EDR at the same time.
Specifically, when the physical quantity represented by the signal satisfying the set numerical condition is a continuous variable (such as a vehicle speed, a steering wheel angle), the control transmits the signal satisfying the set numerical condition to the EDR through the target communication harness by the on-board network simulated on the test bed, including:
the vehicle-mounted network simulated on the test bed is controlled to transmit signals representing the same physical quantity to the EDR for a plurality of times through the target communication wire harness, the values of the signals representing the same physical quantity transmitted to the EDR each time are different, and the change degree of the values transmitted in two adjacent times reaches a threshold value; determining a process of transmitting a primary signal to the EDR through the target communication harness as a test process; the numerical values of the signals transmitted to the EDR through the target communication wire harness are different in each test, the change degree of the numerical values transmitted by two adjacent times reaches the threshold value, the obvious change of the data communicated in the target communication wire harness is ensured, the subsequent data statistics and comparison work is convenient, and the data processing efficiency and accuracy can be improved.
Correspondingly, the reading the second data recorded by the EDR includes:
The second data recorded by the EDR is read once after each transmission of a signal representing the same physical quantity to the EDR. That is, the second data recorded by the EDR is read once every test, and if the number of tests is 10, 10 parts of the second data are read.
Further, the comparing the second data with the value of the signal satisfying the set value condition to determine the position of the physical quantity represented by the signal satisfying the set value condition in the second data includes:
determining the change trend of the numerical value of the signals representing the same physical quantity transmitted to the EDR for a plurality of times;
determining data items which are the same as the change trend from second data recorded by EDR obtained in a plurality of tests;
and determining the position of the data item in the second data recorded by the EDR as the position of the physical quantity represented by the signal meeting the set numerical condition in the second data recorded by the EDR.
The trend of change may be represented by a change curve, for example, the horizontal axis represents a mark or time of the test sequence, the vertical axis represents a value (for example, vehicle speed) of a signal representing the same physical quantity transmitted to the EDR a plurality of times, and the value of the signal representing the same physical quantity transmitted to the EDR each time is counted in the test sequence under the coordinate system, so that a change curve of the value of the signal representing the same physical quantity transmitted to the EDR is obtained. In a similar manner, the values at the respective positions in the second data recorded by the EDR obtained from the plurality of tests are also counted in the above-mentioned coordinate system, a change curve of the values at the respective positions is obtained, and the position corresponding to the curve overlapping the change curve of the values of the signals representing the same physical quantity is determined as the position of the physical quantity represented by the signals in the data recorded by the EDR.
In summary, the data recorded by the EDR obtained from multiple tests are compared transversely to find the value and the position of the change, and the position of the physical quantity represented by the signal in the data recorded by the EDR can be determined by combining the value of the signal and the physical meaning of the signal in each test.
Further, when the physical quantity represented by the signal satisfying the set numerical condition is a discontinuous variable, the comparing the second data with the numerical value of the signal satisfying the set numerical condition to determine the position of the physical quantity represented by the signal satisfying the set numerical condition in the second data includes:
determining data items which are the same as the values of the signals meeting the set value conditions in the second data recorded by the EDR;
and determining the position of the data item in the second data recorded by the EDR as the position of the physical quantity represented by the signal meeting the set numerical condition in the second data recorded by the EDR.
And S160, when the source of the data recorded by the EDR is the data acquired by the sensor in the EDR, controlling the accelerating device to accelerate according to the second set acceleration level and/or controlling the overturning device to overturn according to the second set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, reading the third data recorded by the EDR, comparing the third data with the second set acceleration and/or the second set overturning acceleration, and establishing a corresponding relation between the horizontal acceleration and the position and/or a corresponding relation between the overturning acceleration and the position.
The second set acceleration and the second set overturning acceleration both meet the condition of triggering the EDR data recording function. Comparing the third data with the second set acceleration and/or the second set turning acceleration to determine the position of the value of the horizontal acceleration in the third data and/or determine the position of the value of the turning acceleration in the third data, and establishing a corresponding relation between the horizontal acceleration and the position and/or a corresponding relation between the turning acceleration and the position.
S170, determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
Wherein the correspondence indicates a position of a numerical value of the corresponding physical quantity in the data to be analyzed. By way of example, assuming that the physical quantity is a vehicle speed and a steering wheel angle, respectively, wherein the correspondence of the vehicle speed and the position is "vehicle speed-first data bit", the correspondence of the steering wheel angle and the position is "steering wheel angle-second data bit", the data to be analyzed is "0030 0080", and based on the correspondence, it can be determined that the value of the vehicle speed in the data to be analyzed is 80 (in units of km/h), and the value of the steering wheel angle is 30 (in units of degrees).
It can be understood that the data to be analyzed recorded by EDR is a series of data, if the corresponding relation between each physical quantity and the position is not clear, it cannot be determined what the recorded physical quantity is and what the corresponding numerical value is, that is, the data analysis cannot be realized. According to the technical scheme, the numerical value of each physical quantity in the data to be analyzed is determined according to the corresponding relation between each physical quantity and the position, the purpose of analyzing the data to be analyzed recorded by the EDR is achieved, and a reference is provided for the recurrence of the accident scene. Further, the correspondence may also include units of the corresponding physical quantities, coefficients, and the like. For example, when the corresponding physical quantity is the vehicle speed, the unit of the vehicle speed in the data recorded by the EDR may be m/h, and the corresponding vehicle speed value is different compared with the unit of km/h, so when the unit of a certain physical quantity in the data recorded by the EDR is not a standard unit, the corresponding relationship can be marked to ensure the accuracy and precision of analysis. There are also physical quantities, in which the value recorded by EDR is multiplied by the corresponding coefficient to obtain the true value, in which case the corresponding coefficient may be marked in the correspondence.
The method provided by the embodiment of the invention realizes the purpose of analyzing the data recorded by the EDR, provides a feasible solution for analyzing various EDR protocols, realizes a control variable method (namely, only controlling the numerical value of one signal transmitted in the target communication wire harness in each bench test) by setting the bench test, and greatly reduces the difficulty of data analysis.
The embodiment of the invention also provides a device for analyzing the data of the event data recording system based on the bench test, which comprises the following steps:
the simulation module is used for simulating a vehicle-mounted network and a target communication wire harness of the target vehicle on the test bench, wherein the vehicle-mounted network on the real vehicle of the target vehicle communicates with the vehicle-mounted event data recording system EDR through the vehicle-mounted target communication wire harness; the installation module is used for installing EDR on the accelerating device and/or the turnover device on the test bench and carrying out communication connection with the vehicle-mounted network simulated on the test bench through the target communication wire harness simulated on the test bench; the first control module is used for controlling the accelerating device to accelerate according to a first set acceleration level and/or controlling the overturning device to overturn according to a first set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, and simultaneously controlling a vehicle-mounted network simulated on the test bench to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR, wherein the first set acceleration, the first set overturning acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR; the source determining module is used for comparing the first data with the first set acceleration, the first set overturning acceleration and the first preset value to determine a source of data recorded by the EDR when a data recording function of the EDR is triggered, wherein the source comprises data acquired by a sensor in the EDR and/or data transmitted to the EDR through a target communication wire harness; the second control module is used for controlling a vehicle-mounted network simulated on the test bench to transmit signals meeting set numerical conditions to the EDR through the target communication wire harness when determining that the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, the signals meeting the set numerical conditions meet the conditions for triggering the data recording function of the EDR at the same time, reading the second data recorded by the EDR, comparing the second data with the numerical values of the signals meeting the set numerical conditions to determine the positions of the physical quantities represented by the signals meeting the set numerical conditions in the second data, and establishing the corresponding relation between the physical quantities and the positions; the third control module is used for controlling the accelerating device to accelerate according to a second set acceleration level and/or controlling the overturning device to overturne according to a second set acceleration when determining that the source of the data recorded by the EDR is the data acquired by the sensor in the EDR, so as to drive the EDR to move through the accelerating device and/or the overturning device, wherein the second set acceleration and the second set overturning acceleration meet the condition of triggering the data recording function of the EDR, the third data recorded by the EDR are read, the third data are compared with the second set acceleration and/or the second set overturning acceleration, so that the position of the numerical value of the horizontal acceleration in the third data is determined, and/or the position of the numerical value of the overturning acceleration in the third data is determined, and the corresponding relation between the horizontal acceleration and the position and/or the corresponding relation between the overturning acceleration and the position are established; and the analysis module is used for determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 2, electronic device 400 includes one or more processors 401 and memory 402.
The processor 401 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities and may control other components in the electronic device 400 to perform desired functions.
Memory 402 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that can be executed by the processor 401 to implement the bench test based event data logging system data parsing method and/or other desired functions of any of the embodiments of the invention described above. Various content such as initial arguments, thresholds, etc. may also be stored in the computer readable storage medium.
In one example, the electronic device 400 may further include: an input device 403 and an output device 404, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown). The input device 403 may include, for example, a keyboard, a mouse, and the like. The output device 404 may output various information to the outside, including early warning prompt information, braking force, etc. The output device 404 may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device 400 that are relevant to the present invention are shown in fig. 2 for simplicity, components such as buses, input/output interfaces, etc. are omitted. In addition, electronic device 400 may include any other suitable components depending on the particular application.
In addition to the methods and apparatus described above, embodiments of the present invention may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps of the bench test based event data logging system data parsing method provided by any of the embodiments of the present invention.
The computer program product may write program code for performing operations of embodiments of the present invention in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present invention may also be a computer-readable storage medium, on which computer program instructions are stored, which, when being executed by a processor, cause the processor to perform the steps of the bench test based event data recording system data parsing method provided by any of the embodiments of the present invention.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in this specification, the terms "a," "an," "the," and/or "the" are not intended to be limiting, but rather are to be construed as covering the singular and the plural, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements.
It should also be noted that the positional or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a method for analyzing event data recording system data based on bench test which is characterized in that the method comprises the following steps:
simulating a vehicle-mounted network and a target communication harness of a target vehicle on a test bench, wherein the vehicle-mounted network communicates with an EDR (vehicle-mounted event data recording) system through the vehicle-mounted target communication harness on a real vehicle of the target vehicle;
the EDR is installed on an accelerating device and/or a turnover device on the test bed and is in communication connection with a vehicle-mounted network simulated on the test bed through a target communication wire harness simulated on the test bed;
the acceleration device is controlled to accelerate according to a first set acceleration level and/or the turnover device is controlled to turnover according to a first set turnover acceleration level so as to drive the EDR to move through the acceleration device and/or the turnover device, and meanwhile, a vehicle-mounted network simulated on a test bench is controlled to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR, wherein the first set acceleration, the first set turnover acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR;
Comparing the first data with the first preset value, and comparing the first data with the first set acceleration and/or the first set flip acceleration to determine a source of data recorded by the EDR when a data recording function of the EDR is triggered, wherein the source comprises data collected by a sensor in the EDR and/or data transmitted to the EDR through a target communication harness;
when determining that the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, controlling a vehicle-mounted network simulated on the test bench to transmit a signal meeting a set numerical value condition to the EDR through the target communication wire harness, enabling the signal meeting the set numerical value condition to meet the condition for triggering the data recording function of the EDR, reading second data recorded by the EDR, comparing the second data with the numerical value of the signal meeting the set numerical value condition, determining the position of the physical quantity represented by the signal meeting the set numerical value condition in the second data, and establishing the corresponding relation between the physical quantity and the position;
when the source of the data recorded by the EDR is the data acquired by a sensor in the EDR, controlling the accelerating device to accelerate according to a second set acceleration level and/or controlling the overturning device to overturn according to a second set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, wherein the second set acceleration and the second set overturning acceleration meet the condition of triggering the data recording function of the EDR, reading third data recorded by the EDR, comparing the third data with the second set acceleration and/or the second set overturning acceleration to determine the position of the numerical value of the horizontal acceleration in the third data, and/or determining the position of the numerical value of the overturning acceleration in the third data, and establishing the corresponding relation between the horizontal acceleration and the position and/or the corresponding relation between the overturning acceleration and the position;
And determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
2. The method according to claim 1, wherein when the physical quantity represented by the signal satisfying the set-value condition is a continuous variable, the controlling the on-vehicle network simulated on the test bed to transmit the signal satisfying the set-value condition to the EDR through the target communication harness includes:
the method comprises the steps of controlling a vehicle-mounted network simulated on a test bed to transmit signals representing the same physical quantity to the EDR for a plurality of times through a target communication wire harness, wherein the values of the signals transmitted to the EDR each time are different, and the change degree of the values transmitted in two adjacent times reaches a threshold value; determining a process of transmitting a primary signal to the EDR through the target communication harness as a test process;
correspondingly, the reading the second data recorded by the EDR includes:
the second data recorded by the EDR is read once after each transmission of a signal representing the same physical quantity to the EDR.
3. The method of claim 2, wherein comparing the second data with the values of the signals satisfying the set value condition to determine the position of the physical quantity represented by the signals satisfying the set value condition in the second data comprises:
Determining the change trend of the numerical value of the signal representing the same physical quantity transmitted to the EDR for a plurality of times;
determining data items which are the same as the change trend from second data recorded by EDR obtained in a plurality of test processes;
and determining the position of the data item in the second data recorded by the EDR as the position of the physical quantity represented by the signal meeting the set numerical condition in the second data recorded by the EDR.
4. The method according to claim 1, wherein when the physical quantity represented by the signal satisfying the set numerical condition is a discontinuous variable, the comparing the second data with the numerical value of the signal satisfying the set numerical condition to determine the position of the physical quantity represented by the signal satisfying the set numerical condition in the second data includes:
determining data items which are the same as the values of the signals meeting the set value conditions in the second data recorded by the EDR;
and determining the position of the data item in the second data recorded by the EDR as the position of the physical quantity represented by the signal meeting the set numerical condition in the second data recorded by the EDR.
5. The method of any one of claims 1-4, wherein the controlling the on-board network simulated on the test rig prior to transmitting the signal of the first predetermined value to the EDR via the target communication harness further comprises:
Acquiring information communicated in a target communication harness of the target vehicle;
analyzing the information to obtain physical quantities contained in the information;
and performing bench test design according to the physical quantity included in the information to obtain the signal of the first preset value.
6. The method according to claim 5, wherein the analyzing the information to obtain the physical quantity included in the information includes:
analyzing the information by using a CAN signal analysis mode to obtain physical quantities included in the information, wherein the physical quantities comprise: steering wheel angle, vehicle speed, horizontal acceleration, accelerator pedal opening, whether the passenger is in the front passenger seat, and whether the seat is fastened with one or more of the seat belts.
7. An analysis device of event data recording system data based on bench test, characterized by comprising:
the simulation module is used for simulating a vehicle-mounted network and a target communication wire harness of the target vehicle on the test bench, wherein the vehicle-mounted network on the real vehicle of the target vehicle communicates with the vehicle-mounted event data recording system EDR through the vehicle-mounted target communication wire harness;
the installation module is used for installing EDR on the accelerating device and/or the turnover device on the test bench and carrying out communication connection with the vehicle-mounted network simulated on the test bench through the target communication wire harness simulated on the test bench;
The first control module is used for controlling the accelerating device to accelerate according to a first set acceleration level and/or controlling the overturning device to overturn according to a first set overturning acceleration so as to drive the EDR to move through the accelerating device and/or the overturning device, and simultaneously controlling a vehicle-mounted network simulated on the test bench to transmit a signal of a first preset value to the EDR through a target communication wire harness so as to obtain first data recorded by the EDR, wherein the first set acceleration, the first set overturning acceleration and the first preset value all meet the condition of triggering the data recording function of the EDR;
the source determining module is used for comparing the first data with the first preset value and comparing the first data with the first set acceleration and/or the first set turning acceleration so as to determine the source of the data recorded by the EDR when the data recording function of the EDR is triggered, wherein the source comprises the data collected by a sensor in the EDR and/or the data transmitted to the EDR through a target communication wire harness;
the second control module is used for controlling a vehicle-mounted network simulated on the test bench to transmit signals meeting set numerical conditions to the EDR through the target communication wire harness when determining that the source of the data recorded by the EDR is the data transmitted to the EDR through the target communication wire harness, the signals meeting the set numerical conditions meet the conditions for triggering the data recording function of the EDR at the same time, reading the second data recorded by the EDR, comparing the second data with the numerical values of the signals meeting the set numerical conditions to determine the positions of the physical quantities represented by the signals meeting the set numerical conditions in the second data, and establishing the corresponding relation between the physical quantities and the positions;
The third control module is used for controlling the accelerating device to accelerate according to a second set acceleration level and/or controlling the overturning device to overturne according to a second set acceleration when determining that the source of the data recorded by the EDR is the data acquired by the sensor in the EDR, so as to drive the EDR to move through the accelerating device and/or the overturning device, wherein the second set acceleration and the second set overturning acceleration meet the condition of triggering the data recording function of the EDR, the third data recorded by the EDR are read, the third data are compared with the second set acceleration and/or the second set overturning acceleration, so that the position of the numerical value of the horizontal acceleration in the third data is determined, and/or the position of the numerical value of the overturning acceleration in the third data is determined, and the corresponding relation between the horizontal acceleration and the position and/or the corresponding relation between the overturning acceleration and the position are established;
and the analysis module is used for determining the numerical value of the physical quantity in the data to be analyzed recorded by the EDR by utilizing the corresponding relation.
8. An electronic device, the electronic device comprising:
A processor and a memory;
the processor is configured to execute the steps of the bench test-based event data recording system data parsing method according to any of claims 1 to 6 by calling the program or instructions stored in the memory.
9. A computer-readable storage medium storing a program or instructions that cause a computer to execute the steps of the bench test-based event data recording system data analysis method according to any of claims 1 to 6.
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