CN114067459B - Motor vehicle safety performance test system - Google Patents
Motor vehicle safety performance test system Download PDFInfo
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- CN114067459B CN114067459B CN202111060924.7A CN202111060924A CN114067459B CN 114067459 B CN114067459 B CN 114067459B CN 202111060924 A CN202111060924 A CN 202111060924A CN 114067459 B CN114067459 B CN 114067459B
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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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
- G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a motor vehicle safety performance test system which comprises a differential reference station, a mobile station, a brake trigger, a data processing terminal and a portable monitoring terminal, wherein the data processing terminal comprises a performance test module, a data processing module, a first communication module, a first configuration module and a data storage module. According to the motor vehicle safety performance test system, the reference station carrier phase observation information is acquired through the reference station, the mobile station carrier phase observation information and the azimuth angle information are acquired through the mobile station, and the brake trigger signal of the vehicle to be tested is acquired through the brake trigger, so that the data can be acquired, processed and stored by the data processing terminal, various safety performance tests of the vehicle are realized, the motor vehicle safety performance test is more intelligent, and the efficiency of the motor vehicle safety performance test is improved.
Description
Technical Field
The invention relates to the technical field of automobile performance testing, in particular to a motor vehicle safety performance testing system.
Background
The motor vehicle safety performance test mainly comprises acceleration and maximum speed test, brake performance test, steering performance test, linear deflection test and the like. The existing test system can only be used for testing single performance, and the measurement accuracy of the test system is low, so that the intelligent degree is low.
Disclosure of Invention
The invention aims to provide a motor vehicle safety performance testing system, which enables motor vehicle safety performance testing to be more intelligent and improves motor vehicle safety performance testing efficiency.
To achieve the above object, a safety performance test system for a motor vehicle includes: the system comprises a differential reference station, a mobile station, a brake trigger, a data processing terminal and a portable monitoring terminal, wherein the differential reference station is erected on a vacant point of a test site and is used for acquiring carrier phase observation information of the reference station in real time and transmitting the carrier phase observation information to the mobile station in a wireless mode; the mobile station is arranged on a vehicle to be tested and used for acquiring carrier phase observation information of the mobile station and azimuth information of the vehicle to be tested in real time and calculating the position, the speed and the gesture of the vehicle to be tested by combining the carrier phase observation information of the reference station; the brake trigger is used for acquiring a brake trigger signal on a brake pedal and sending the brake trigger signal to the mobile station;
the data processing terminal comprises a performance testing module, a data processing module, a first communication module, a first configuration module and a data storage module, wherein the performance testing module is used for generating a performance testing instruction, the data processing module is used for processing the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station, so as to obtain a performance testing result, the data storage module is used for storing the performance testing result for data offline analysis, the first configuration module is used for setting the communication parameters of the first communication module, and the first communication module is used for sending the performance testing instruction to the mobile station and receiving the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station in a message form;
the data processing module comprises a steering radius testing unit and a deflection test unit, wherein the steering radius testing unit is used for determining a steering circular arc track curve of the vehicle to be tested according to the position, the speed and the gesture of the vehicle to be tested, dividing the steering circular arc track curve into a plurality of sections, selecting a plurality of position point sets from the sections, each position point set consists of 3 position points, calculating a plurality of fitting circles according to the position point sets by using a steering radius fitting algorithm, obtaining center coordinates and radiuses of the fitting circles, and determining the minimum steering circle and the minimum steering radius of the vehicle to be tested from the fitting circles according to the saturation and the fitting degree of the fitting circles to be used as a steering radius testing result of the vehicle to be tested; the deflection test unit is used for selecting test starting point data and test end point data from the position, the speed and the gesture of the vehicle to be tested according to the brake trigger signal, and calculating the brake deflection of the vehicle to be tested according to the test starting point data and the test end point data;
the portable monitoring terminal is communicated with the mobile station through a serial port, and the portable monitoring terminal receives the performance test instruction sent by the mobile station and the position, the speed and the gesture of the vehicle to be tested so as to prompt a tester to perform performance test.
Preferably, the performance test command includes a speed performance test command, a braking performance test command, a steering performance test command, and a linear deviation test command.
Preferably, the data processing module includes a data analysis unit and a data calculation unit, the data analysis unit is used for analyzing the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station in a message form, and the data calculation unit is used for calculating the position, the speed and the gesture of the vehicle to be tested to obtain a performance test result.
Preferably, the data processing terminal further includes a first display module, configured to display the performance test result through different interfaces, where the test result includes a table chart, a graph chart, a list chart, and a track chart.
Preferably, the first configuration module stores and loads communication parameters through a configuration file, and the format of the configuration file is a general INI format.
Preferably, the data storage module adopts an open source SQLITE database, and a data table of the SQLITE database comprises time, position, speed, acceleration, distance, gesture, rotating speed, gear, braking state, star collecting number and straight running state.
Preferably, the mobile station includes: the system comprises a data fusion processing module, a second configuration module and a second communication module, wherein the data fusion processing module is used for fusion processing of the reference station carrier phase observation information, the mobile station carrier phase observation information and the azimuth angle information to obtain the position, the speed and the gesture of the vehicle to be tested, the data after fusion processing, the engine rotating speed, the gear and the braking trigger signal of the vehicle to be tested are packaged together and then are respectively sent to the data processing terminal and the portable monitoring terminal through the second communication module, and the second configuration module is used for setting the communication parameters of the second communication module.
Preferably, the second communication module comprises a wireless communication unit, a serial communication unit, a CAN bus unit and an I/O acquisition unit, the mobile station is communicated with the data processing terminal through the wireless communication unit, the mobile station is communicated with the portable monitoring terminal through the serial communication unit, the mobile station receives the engine rotating speed and the gear of the vehicle to be tested through the CAN bus unit, and the mobile station receives a braking trigger signal of the braking trigger through the I/O acquisition unit.
Preferably, the portable monitoring terminal comprises a second display module and a reminding module, wherein the second display module is used for displaying the current motion parameters and state instructions of the vehicle to be tested, and the reminding module is used for reminding key information or key operation.
Preferably, the reminding module comprises a light reminding and/or a sound reminding.
The invention has the following advantages:
the motor vehicle safety performance test system comprises the differential reference station, the mobile station, the brake trigger, the data processing terminal and the portable monitoring terminal, and is simple in structure and convenient to install, the reference station is used for acquiring the reference station carrier phase observation information, the mobile station is used for acquiring the mobile station carrier phase observation information and azimuth angle information, and the brake trigger signal of the motor vehicle to be tested is acquired through the brake trigger, the data processing terminal can acquire, process and store the data, various safety performance tests of the motor vehicle are realized, the motor vehicle safety performance test is more intelligent, and the efficiency of the motor vehicle safety performance test is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
FIG. 1 is a schematic diagram illustrating a motor vehicle safety performance test system according to an exemplary embodiment;
FIG. 2 is a block diagram of a data processing terminal of the motor vehicle safety performance test system, according to an exemplary embodiment;
FIG. 3 is a logic diagram illustrating the operation of a data processing terminal of the motor vehicle safety performance test system, according to an exemplary embodiment;
FIG. 4 is a schematic interface diagram of a data processing terminal of a motor vehicle safety performance test system, according to an exemplary embodiment;
FIG. 5 is a block diagram of a mobile station of the motor vehicle safety performance test system, according to an exemplary embodiment;
FIG. 6 is a logic diagram illustrating the operation of a mobile station of the motor vehicle safety performance test system, according to an exemplary embodiment;
FIG. 7 is a block diagram of a portable monitor terminal of the motor vehicle safety performance test system according to an exemplary embodiment;
FIG. 8 is a logic diagram of the operation of a portable monitor terminal of the motor vehicle safety performance test system shown in accordance with an exemplary embodiment;
fig. 9 is an interface schematic diagram of a portable monitoring terminal of the motor vehicle safety performance test system according to an exemplary embodiment.
Reference numerals illustrate:
1-a differential reference station;
2-a mobile station;
21-a data fusion processing module; 22-a second configuration module; 23-a second communication module;
3-a brake trigger;
4-a data processing terminal; 41-a performance test module; 42-a data processing module;
43-a first communication module; 44-a first configuration module; 45-a data storage module;
46-a first display module; 47-prompting module;
5-a portable monitoring terminal; 51-a second display module; 52-a reminding module;
53-a data parsing module; 54-a third communication module; 55-a third configuration module;
6-satellite group.
Detailed Description
The technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments, but it should be understood by those skilled in the art that the embodiments described below are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present invention, are within the scope of the present invention.
Preferred embodiments of the present invention will be described in detail below with reference to examples. It should be understood that the following examples are given for illustrative purposes only and are not intended to limit the scope of the present invention. Various modifications and substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention, all such modifications and substitutions being within the scope of the invention as set forth in the appended claims.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
The invention is further described below with reference to the accompanying drawings and examples:
in order to achieve the above object, referring to fig. 1, an embodiment of the present invention provides a system for testing safety performance of a motor vehicle, including: the system comprises a differential reference station 1, a mobile station 2, a brake trigger 3, a data processing terminal 4 and a portable monitoring terminal 5, wherein the differential reference station 1 is arranged on a vacant point of a test site and is used for acquiring reference station carrier phase observation information in real time and transmitting the reference station carrier phase observation information to the mobile station 2 in a wireless mode; the mobile station 2 is arranged on the vehicle to be tested, and is used for acquiring carrier phase observation information of the mobile station and azimuth angle information of the vehicle to be tested in real time, and calculating the position, the speed and the gesture of the vehicle to be tested by combining the carrier phase observation information of the reference station; the brake trigger 3 is used for acquiring a brake trigger signal on a brake pedal and transmitting the brake trigger signal to the mobile station 2;
as shown in fig. 2, the data processing terminal 4 includes a performance test module 41, a data processing module 42, a first communication module 43, a first configuration module 44, and a data storage module 45, where the performance test module 41 is configured to generate a performance test instruction, the data processing module 42 is configured to process a position, a speed, and an attitude of a vehicle to be tested sent by the mobile station to obtain a performance test result, the data storage module 45 is configured to store the performance test result for offline analysis of data, the first configuration module 44 is configured to set communication parameters of the first communication module 43, the first communication module 43 sends the performance test instruction to the mobile station 2, and receives the position, the speed, and the attitude of the vehicle to be tested sent by the mobile station 2 in a message form;
the data processing module 42 includes a steering radius test unit and a deflection test unit, the steering radius test unit is configured to determine a steering arc track curve of the vehicle to be tested according to a position, a speed and a posture of the vehicle to be tested, divide the steering arc track curve into a plurality of intervals, select a plurality of position point sets from the plurality of intervals, each position point set is composed of 3 position points, calculate a plurality of fitting circles according to the plurality of position point sets by using a steering radius fitting algorithm, obtain center coordinates and radii of the fitting circles, and determine a minimum steering circle and a minimum steering radius of the vehicle to be tested from the fitting circles according to saturation and fitting degree of the fitting circles as a steering radius test result of the vehicle to be tested; the deflection amount testing unit is used for selecting testing starting point data and testing end point data from the position, the speed and the gesture of the vehicle to be tested according to the braking trigger signal, and calculating the braking deflection amount of the vehicle to be tested according to the testing starting point data and the testing end point data;
the portable monitoring terminal 5 communicates with the mobile station 2 through a serial port, and the portable monitoring terminal 5 receives the performance test instruction sent by the mobile station 2 and the position, speed and posture of the vehicle to be tested so as to prompt a tester to perform performance test.
It should be noted that the obtaining, by the steering radius test unit, the steering arc track curve of the vehicle to be tested includes: selecting a test starting point; determining azimuth data and position data from the position, speed and posture of the vehicle to be tested, and searching data points adjacent to the azimuth value of the test starting point from the azimuth data as test ending points; and determining a steering arc track curve according to the azimuth angle data and the position data between the test starting point and the test ending point.
The steering radius test unit divides the steering arc track curve into a plurality of sections, selects a plurality of position point sets from the sections, wherein each position point set comprises 3 position points and comprises: equally dividing the position data between the test starting point and the test ending point into 8 sections; selecting a data point from the vicinity of the midpoint of each interval to obtain 8 data points; a set of 8 location points is selected from the 8 data points using a space selection method.
In addition, the steering radius test unit performs correction fitting on track points forming a steering arc track curve by using a least square fitting algorithm.
The offset test unit calculates a braking offset of a vehicle of the vehicle to be tested according to the test start point data and the test end point data, including:
respectively obtaining test starting points H 0 And test endpoint H 1 Position coordinates (X) 0 ,Y 0 )、(X 1 ,Y 1 ) And course angle alpha 0 ，α 1 ；
Calculating the braking deviation amount n of the vehicle:
n＝√(X 1 2 -X 0 2 ) 2 +(Y 1 2 -Y 0 2)2 ×sin(α 1 -α 0 )
it should be noted that, in this embodiment, the data processing terminal adopts a modular design, which mainly includes a first configuration module, a first communication module, a data processing module, a data storage module, a performance testing module, and so on. The first communication module mainly comprises initialization of communication, data receiving and data sending, and the basic operation of communication is guaranteed. The first communication module in the data processing terminal comprises a serial port communication unit, the serial port communication unit comprises a serial port opening function, a serial port closing function, a serial port sending data function and a serial port receiving data thread, the serial port is opened by automatically executing the serial port opening function after initialization through communication parameters loaded by the first configuration module, and meanwhile, the serial port receiving data thread is started to wait for the arrival of a mobile station information message.
The motor vehicle safety performance test system comprises the differential reference station, the mobile station, the brake trigger, the data processing terminal and the portable monitoring terminal, and is simple in structure and convenient to install, the reference station is used for acquiring the reference station carrier phase observation information, the mobile station is used for acquiring the mobile station carrier phase observation information and azimuth angle information, and the brake trigger signal of the vehicle to be tested is acquired through the brake trigger, the data processing terminal can acquire, process and store the data, various safety performance tests of the vehicle can be realized, the motor vehicle safety performance test is more intelligent, and the efficiency of the motor vehicle safety performance test is improved.
According to the above scheme, further, the performance test instruction of the embodiment of the invention comprises a speed performance test instruction, a brake performance test instruction, a steering performance test instruction and a linear deviation test instruction. The performance test module in the embodiment mainly realizes the performance test of acceleration performance, maximum speed and constant speed performance test, braking performance test, steering performance test and linear deflection test, wherein the acceleration performance test and the maximum speed performance test mainly realize the performance test of maximum acceleration, acceleration time, acceleration distance, maximum speed and other performances of each gear in the acceleration process, the braking performance test mainly realizes the performance test of braking distance, braking time, average braking acceleration, braking deflection and other performances in the braking process at each speed, the steering performance test mainly realizes the display of any position track on equipment in the steering process and the calculation of steering radius, and the linear deflection performance test mainly realizes the test of transverse deflection in the linear driving state.
According to the above-mentioned scheme, further referring to fig. 2, the data processing module 42 in the embodiment of the present invention includes a data parsing unit 421 and a data calculating unit 422, where the data parsing unit 421 is configured to parse the position, the speed and the posture of the vehicle to be tested sent by the mobile station in a message form, and the data calculating unit 422 is configured to calculate the position, the speed and the posture of the vehicle to be tested to obtain the performance test result. The data processing module mainly comprises data analysis and data calculation, after the serial port receives the mobile station information message, the serial port firstly analyzes the message according to the data message format to obtain all parameter information of the mobile station, then sends all parameter information to the display module to display in modes of form graphs, list graphs, track graphs and the like, and simultaneously calculates certain parameter information according to algorithms and formulas to obtain data required by performance test, and sends test results to the display module to display after the performance test is completed.
According to the above-mentioned scheme, further, referring to fig. 2, the data processing terminal 4 according to the embodiment of the present invention further includes a first display module 46, configured to display, through different interfaces, performance test results, where the test results include a table graph, a list graph, and a trace graph. In this embodiment, the first display module is mainly used for displaying real-time data, historical data, performance test data, and the display mode includes a graph, a table chart, a track chart, and the like, where the display module includes a plurality of interfaces, mainly including a summary information interface, a current test device historical data interface, a test device real-time data interface, an acceleration performance and maximum speed performance test interface, a brake performance test interface, a steering performance test interface, and a linear deflection performance test interface, and different interfaces are displayed according to user operation, and different interface display contents are displayed differently according to requirements.
According to the above-mentioned scheme, further, referring to fig. 2, the first configuration module 44 according to the embodiment of the present invention stores and loads the communication parameters through a configuration file, where the format of the configuration file is a general INI format. It should be noted that, in this embodiment, the communication parameters of the communication module stored in the configuration file mainly include a serial number, a baud rate, a data bit, a check bit, a stop bit, and the like.
According to the above-mentioned scheme, further, referring to fig. 2, the data storage module 45 according to the embodiment of the present invention adopts an open source SQLITE database, where the data table of the SQLITE database includes time, position, speed, acceleration, distance, attitude, rotation speed, gear, braking state, star count and straight running state.
According to the above-mentioned scheme, further, referring to fig. 2, the data processing terminal 4 of the embodiment of the present invention further includes a prompting module 47, which is an audio prompt for prompting the key information or the key operation. It should be noted that, the voice prompt module realizes an audio object, and the warning voice prompt is realized through audio playing. Of course, the prompting module in this embodiment may also be a text prompt, which is implemented through a display list, and is used for displaying a memo.
Referring to fig. 3, after the data processing terminal is started, a first configuration module, a first communication module, a data storage module, a first display module, a sound prompt module and a performance test module are initialized; then loading communication parameters from a local configuration file through a first configuration module, initializing the first communication module through the communication parameters, and operating a data processing module to receive data; after the data storage module is initialized, an SQLITE database object is realized, and the data storage module waits for the storage and loading of execution data; after the first display module is initialized, all display interfaces including various graphs, track diagrams, lists and the like are created; after the voice prompt module is initialized, an audio object is realized, and voice broadcasting is waited to be executed; after the performance test module is initialized, the display and data of each performance test unit are initialized, and a user waits for executing a certain performance test. After receiving the mobile station information, the data processing module firstly analyzes the message, then completes corresponding data calculation according to the current performance test state, simultaneously stores the mobile station information and the test data into a database file and displays the database file on a corresponding interface, and if key information appears, carries out voice prompt through an audio object. When the user performs offline data analysis, historical data is loaded from the database and displayed, and the user can perform the analysis. When the user triggers the acceleration and maximum speed performance test, the braking performance test, the steering performance test and the linear deflection performance test, the mobile station enters a test mode, and the mobile station information is calculated and analyzed in real time.
After the data processing terminal is started, firstly, a summary information interface of the data processing terminal is opened, the summary information interface of the data processing terminal is shown in FIG. 4, and the local time, the name of the current test equipment and the current test state are displayed in the upper left corner; the lower left corner list also displays some key information or key operations generated in the running process so as to view a memo later; the middle list mainly displays the position information of each part of the mobile station vehicle, and whether each part is displayed or not and the color of the display can be independently set; the right graph mainly displays real-time curves of the position, the speed, the acceleration and the heading of the mobile station, whether each item is displayed or not can be set independently by checking, the display color of each item can be set, and the zooming display of the graph can be realized by mouse frame selection. The preparation, start and end of the acceleration performance and maximum speed performance test, the braking performance test, the steering performance test, the linear deflection performance test can be performed through the test menu, respectively.
According to the above-described scheme, further, referring to fig. 5, the mobile station 2 according to the embodiment of the present invention includes: the data fusion processing module 21, the second configuration module 22 and the second communication module 23, the data fusion processing module 21 is used for fusion processing of reference station carrier phase observation information, mobile station carrier phase observation information and azimuth angle information to obtain the position, speed and attitude of the vehicle to be tested, the data after fusion processing, the engine speed, gear and braking trigger signal of the vehicle to be tested are packaged together and then are respectively sent to the data processing terminal 4 and the portable monitoring terminal 5 through the second communication module 23, and the second configuration module 22 is used for setting communication parameters of the second communication module 23.
According to the above scheme, further, the second communication module 23 of the mobile station according to the embodiment of the present invention includes a wireless communication unit, a serial port communication unit, a CAN bus unit, and an I/O acquisition unit, where the mobile station communicates with the data processing terminal through the wireless communication unit, the mobile station communicates with the portable monitoring terminal through the serial port communication unit, and the mobile station receives the engine speed and gear of the vehicle to be tested through the CAN bus unit, and the mobile station receives the brake trigger signal of the brake trigger through the I/O acquisition unit.
Referring to fig. 6, after the mobile station is started, a second configuration module, a second communication module and a data fusion processing module are initialized; then loading communication parameters from Flash through a second configuration module, initializing all communication units through the communication parameters, and operating data transmission and data reception of the corresponding communication units; after the data fusion processing module is initialized, a data analysis unit, a data fusion unit and a data packaging unit are initialized, when GNSS data (namely carrier phase observation information of a mobile station) of the satellite group 6 is received, the GNSS data and SINS data (namely carrier phase observation information of a differential reference station) are fused through the data fusion module, the fused data are sent to the data packaging unit, when a brake trigger signal, a vehicle gear, the engine rotating speed and brake state information are received, the received information is sent to the data packaging unit, and the data packaging unit packages the information of all the mobile stations in real time and then broadcasts and sends the information outwards.
According to the above-mentioned scheme, further, referring to fig. 6, the portable monitoring terminal 5 according to the embodiment of the present invention includes a second display module 51 and a reminding module 52, where the second display module 51 is used to display the motion parameters and status indication of the current vehicle to be tested, and the reminding module 52 is used to remind the key information or the key operation. In this embodiment, the second display module is mainly used for displaying real-time data of the device, where a display mode includes a table chart, an indicator light, and the like.
Referring to the display interface shown in fig. 9, the main interface may display the running speed of the vehicle, the number of satellites, etc., the status indicator may display whether the current vehicle is in a straight running state and may step on the brake, the color of the status indicator may change in real time according to the status, for example, when the vehicle is in a straight running state and may step on the brake, the status indicator may display green, otherwise the status indicator may display red. The display contents can be switched by the operations of the previous page, the next page, and the like in the interface.
According to the above-mentioned scheme, further, referring to fig. 4, the reminding module 52 of the portable monitor terminal 5 according to the embodiment of the present invention includes a light reminding and/or an audio reminding. In this embodiment, the reminding module may include an indicator light reminding and a sound reminding, where the indicator light reminding is implemented by a status indicator light, and the color is displayed according to status change; the voice prompt realizes an audio object, the broadcasting prompt of the text and the voice can be realized through text to voice, and the warning voice prompt can be realized through audio playing.
According to the above-mentioned scheme, further, referring to fig. 7, the portable monitoring terminal 5 according to the embodiment of the present invention further includes a third configuration module 55, a third communication module 54, and a data analysis module 53.
In this embodiment, the third configuration module mainly includes storing and loading the communication parameters of the communication module, so as to ensure that the third communication module can normally communicate with the mobile station. The third communication module mainly comprises initialization of communication, data receiving and data sending, and ensures basic operation of communication. The data analysis module mainly comprises data analysis, and analyzes according to a data message format to obtain data to be displayed.
The data processing terminal, the mobile station and the portable monitoring terminal of the motor vehicle safety performance testing system provided by the embodiment of the invention are all in modularized design, have function expansion, can adapt to Windows7 and above operating systems, and are reasonable in interface layout, friendly in interaction, simple to operate, convenient to maintain and reliable in work.
Claims (10)
1. A motor vehicle safety performance test system, comprising: the system comprises a differential reference station, a mobile station, a brake trigger, a data processing terminal and a portable monitoring terminal, wherein the differential reference station is erected on a vacant point of a test site and is used for acquiring carrier phase observation information of the reference station in real time and transmitting the carrier phase observation information to the mobile station in a wireless mode; the mobile station is arranged on a vehicle to be tested and used for acquiring carrier phase observation information of the mobile station and azimuth information of the vehicle to be tested in real time and calculating the position, the speed and the gesture of the vehicle to be tested by combining the carrier phase observation information of the reference station; the brake trigger is used for acquiring a brake trigger signal on a brake pedal and sending the brake trigger signal to the mobile station;
the data processing terminal comprises a performance testing module, a data processing module, a first communication module, a first configuration module and a data storage module, wherein the performance testing module is used for generating a performance testing instruction, the data processing module is used for processing the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station, so as to obtain a performance testing result, the data storage module is used for storing the performance testing result for data offline analysis, the first configuration module is used for setting the communication parameters of the first communication module, and the first communication module is used for sending the performance testing instruction to the mobile station and receiving the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station in a message form;
the data processing module comprises a steering radius testing unit and a deflection test unit, wherein the steering radius testing unit is used for determining a steering circular arc track curve of the vehicle to be tested according to the position, the speed and the gesture of the vehicle to be tested, dividing the steering circular arc track curve into a plurality of sections, selecting a plurality of position point sets from the sections, each position point set consists of 3 position points, calculating a plurality of fitting circles according to the position point sets by using a steering radius fitting algorithm, obtaining center coordinates and radiuses of the fitting circles, and determining the minimum steering circle and the minimum steering radius of the vehicle to be tested from the fitting circles according to the saturation and the fitting degree of the fitting circles to be used as a steering radius testing result of the vehicle to be tested; the deflection test unit is used for selecting test starting point data and test end point data from the position, the speed and the gesture of the vehicle to be tested according to the brake trigger signal, and calculating the brake deflection of the vehicle to be tested according to the test starting point data and the test end point data;
the portable monitoring terminal is communicated with the mobile station through a serial port, and the portable monitoring terminal receives the performance test instruction sent by the mobile station and the position, the speed and the gesture of the vehicle to be tested so as to prompt a tester to perform performance test.
2. The vehicle safety performance test system of claim 1, wherein the performance test instructions include a speed performance test instruction, a brake performance test instruction, a steering performance test instruction, and a linear offset test instruction.
3. The system according to claim 2, wherein the data processing module comprises a data analyzing unit and a data calculating unit, the data analyzing unit is used for analyzing the position, the speed and the gesture of the vehicle to be tested, which are sent by the mobile station in a message form, and the data calculating unit is used for calculating the position, the speed and the gesture of the vehicle to be tested to obtain a performance test result.
4. A motor vehicle safety performance test system according to claim 3, wherein the data processing terminal further comprises a first display module for displaying the performance test results through different interfaces, the test results comprising a table graph, a graph, a list graph and a track graph.
5. The system of claim 4, wherein the first configuration module stores and loads the communication parameters via a configuration file, the configuration file being in a generic INI format.
6. The system of claim 5, wherein the data storage module is an open source SQLITE database, and wherein the data table of the SQLITE database includes time, position, speed, acceleration, distance, attitude, rotational speed, gear, braking status, star count, and straight driving status.
7. The vehicle safety performance test system of claim 1, wherein the mobile station comprises: the system comprises a data fusion processing module, a second configuration module and a second communication module, wherein the data fusion processing module is used for fusion processing of the reference station carrier phase observation information, the mobile station carrier phase observation information and the azimuth angle information to obtain the position, the speed and the gesture of the vehicle to be tested, the data after fusion processing, the engine rotating speed, the gear and the braking trigger signal of the vehicle to be tested are packaged together and then are respectively sent to the data processing terminal and the portable monitoring terminal through the second communication module, and the second configuration module is used for setting the communication parameters of the second communication module.
8. The system according to claim 7, wherein the second communication module includes a wireless communication unit, a serial communication unit, a CAN bus unit, and an I/O acquisition unit, the mobile station communicates with the data processing terminal through the wireless communication unit, the mobile station communicates with the portable monitor terminal through the serial communication unit, the mobile station receives an engine speed and a gear of the vehicle to be tested through the CAN bus unit, and the mobile station receives a brake trigger signal of the brake trigger through the I/O acquisition unit.
9. The system according to claim 1, wherein the portable monitoring terminal comprises a second display module and a reminding module, the second display module is used for displaying current motion parameters and status indications of the vehicle to be tested, and the reminding module is used for reminding key information or key operations.
10. The vehicle safety performance test system of claim 9, wherein the alert module comprises a light alert and/or an audible alert.
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