CN104819740A - CAN bus-based automotive dashboard testing system and method - Google Patents
CAN bus-based automotive dashboard testing system and method Download PDFInfo
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Abstract
The invention discloses a CAN bus-based automotive dashboard testing system and a method and relates to the field of automotive dashboard testing, so as to solve the problems that the prior automotive dashboard has a complex testing process, and simulation of input can not be realized. Continuous variation and 0/1 variation during the automobile use process are simulated respectively, automotive dashboard input can be simulated, signals are sent to a to-be-tested instrument and a virtual instrument controller via the CAN bus at the same time, the virtual instrument controller performs display via a standard instrument display module, performance of the automotive dashboard can be effectively tested, and risks during the development can be effectively reduced. The system and the method can be applied to testing of the automotive dashboard.
Description
Technical field
The present invention relates to automobile instrument field tests.
Background technology
In automobile instrument production run, usual needs are tested the sample first produced, or the instrument of batch production carries out sample testing, but it is complicated to the test process of instrument now, great majority are all adopt the mode of manual detection to realize, and adopt different checkout equipments to realize detection to different parameters, and detection short time consumption is long, efficiency is low, and needing multiple checkout equipment to coordinate realization, testing cost is high.
Summary of the invention
The present invention is the test process complexity in order to solve existing automobile combination meter, length consuming time, problem that cost is high, proposes a kind of automobile combination instrument test system and method based on CAN.
Automobile combination instrument test system based on CAN of the present invention, it comprises CAN and CAN interface circuit, it also comprises proving installation, and described proving installation inside is embedded with simulated data load module, standard meter display module, antiskid brake subcontrol, engine controller, gearbox control and virtual instrument controller;
Simulated data load module comprises consecutive variations amount analog module and 0/1 variable quantity analog module;
Consecutive variations amount analog module: for simulating the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change, and vehicle speed signal is sent to antiskid brake subcontrol, tach signal, water temperature signal and oil consumption signal are sent to engine controller, gear signal is sent to gearbox control;
0/1 variable quantity analog module: produce engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal or failure alarm signal for simulating, and produced brake system fault-signal and ABS system failure signal are sent to antiskid brake subcontrol; Engine MIL fault-signal and engine SVS fault-signal are sent to engine controller simultaneously; Failure alarm signal is sent to gearbox control module;
The brake system fault-signal that antiskid brake subcontrol sends for the vehicle speed signal that receives consecutive variations amount analog module and send and 0/1 variable quantity analog module and ABS system failure signal, and be sent to CAN by the signal received by CAN interface circuit;
The engine MIL fault-signal that engine controller sends for tach signal, water temperature signal and oil consumption signal and the 0/1 variable quantity analog module receiving consecutive variations amount analog module and send and engine SVS fault-signal, and the signal received is sent to CAN by CAN interface circuit;
The failure alarm signal that gearbox control module sends for the gear signal and 0/1 variable quantity analog module receiving the transmission of consecutive variations amount analog module, and the signal received is sent to CAN by CAN interface circuit;
Virtual instrument controller module is used for receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by CAN; And all signals received are sent to standard meter display module;
Standard meter display module is used for all signals received to carry out display translation.
Based on the automobile combination instrument test method of CAN, the method comprises:
The step of simulated data input;
This step comprises:
For simulating the sub-step of the consecutive variations amount simulation of the change of the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change; This sub-step is also for sending vehicle speed signal, tach signal, water temperature signal, gear signal and oil consumption signal;
For simulating the sub-step of the 0/1 variable quantity simulation producing engine MIL fault-signal, engine SVS fault, brake system fault, the ABS system failure, the AT system failure and fault alarm; This sub-step is also for sending engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal and failure alarm signal;
For receiving vehicle speed signal and brake system fault-signal, brake system fault-signal and ABS system failure signal, and by step that the signal received sends;
For receiving tach signal, water temperature signal and oil consumption signal, engine MIL fault-signal and engine SVS fault-signal, and by step that the signal received sends;
For receiving gear signal and failure alarm signal, and by step that the signal received sends;
For receiving the parallel signal of brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal; And by step that the signal received sends;
For receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal, and received all signals are carried out to the step of display translation;
Automobile instrument to be measured receives vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by receiving CAN, and to the step that the signal that automotive meter to be measured shows is observed;
The signal exported in the display of the automobile instrument to be measured of observation and display translation step is contrasted, realizes the test to automobile combination meter to be measured.
The present invention adopts simulated data load module to realize the function of the various vehicle signal of simulation, and the signal that simulation produces is sent to relevant automobile function module, these automobile function modules are the existing module of automobile, the connected mode of these modules and meters under test also adopts the connected mode of the CAN of existing automobile, and then the Validity Test achieved automobile combination meter performance, effectively decrease the risk in performance history.
R&D personnel and test environment designer can certifications mutually, more easily pinpoint the problems; And means of testing is simple, directly perceived, effective.Test operation personnel only need simple declaration training just can participate in test; Testing efficiency is high.Criticize at product antenatal, the demand of small-lot testing can be met completely; Test platform has certain extendability after setting up, and is applied to multiple project after can debugging.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the automobile combination instrument test system based on CAN of the present invention.
Embodiment
Embodiment one, composition graphs 1 illustrate present embodiment, and based on the automobile combination instrument test system of CAN described in present embodiment, it comprises CAN 7 and CAN interface circuit 8,
It is characterized in that, it also comprises proving installation, and described proving installation inside is embedded with simulated data load module 1, standard meter display module 2, antiskid brake subcontrol 3, engine controller 4, gearbox control 5 and virtual instrument controller 6;
Simulated data load module 1 comprises consecutive variations amount analog module and 0/1 variable quantity analog module;
Consecutive variations amount analog module: for simulating the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change, and vehicle speed signal is sent to antiskid brake subcontrol 3, tach signal, water temperature signal and oil consumption signal are sent to engine controller 4, gear signal are sent to gearbox control 5;
0/1 variable quantity analog module: produce engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal or failure alarm signal for simulating, and produced brake system fault-signal and ABS system failure signal are sent to antiskid brake subcontrol 3; Engine MIL fault-signal and engine SVS fault-signal are sent to engine controller 4 simultaneously; Failure alarm signal is sent to gearbox control module 5;
The brake system fault-signal that antiskid brake subcontrol 3 sends for the vehicle speed signal that receives consecutive variations amount analog module and send and 0/1 variable quantity analog module and ABS system failure signal, and be sent to CAN 7 by the signal received by CAN interface circuit 8;
The engine MIL fault-signal that engine controller 4 sends for tach signal, water temperature signal and oil consumption signal and the 0/1 variable quantity analog module receiving consecutive variations amount analog module and send and engine SVS fault-signal, and the signal received is sent to CAN 7 by CAN interface circuit 8;
The failure alarm signal that gearbox control module 5 sends for the gear signal and 0/1 variable quantity analog module receiving the transmission of consecutive variations amount analog module, and the signal received is sent to CAN 7 by CAN interface circuit 8;
Virtual instrument controller module 6 is for receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by CAN 7; And all signals received are sent to standard meter display module 2;
Standard meter display module 2 is for carrying out display translation by all signals received.
Based on the automobile combination instrument test method of CAN described in embodiment two, present embodiment, the method comprises:
The step of simulated data input;
This step comprises:
For simulating the sub-step of the consecutive variations amount simulation of the change of the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change; This sub-step is also for sending vehicle speed signal, tach signal, water temperature signal, gear signal and oil consumption signal;
For simulating the sub-step of the 0/1 variable quantity simulation producing engine MIL fault-signal, engine SVS fault, brake system fault, the ABS system failure, the AT system failure and fault alarm; This sub-step is also for sending engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal and failure alarm signal;
For receiving vehicle speed signal and brake system fault-signal, brake system fault-signal and ABS system failure signal, and by step that the signal received sends;
For receiving tach signal, water temperature signal and oil consumption signal, engine MIL fault-signal and engine SVS fault-signal, and by step that the signal received sends;
For receiving gear signal and failure alarm signal, and by step that the signal received sends;
For receiving the parallel signal of brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal; And by step that the signal received sends;
For receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal, and received all signals are carried out to the step of display translation;
Automobile instrument to be measured receives vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by receiving CAN 7, and to the step that the signal that automotive meter to be measured shows is observed;
The signal exported in the display of the automobile instrument to be measured of observation and display translation step is contrasted, realizes the test to automobile combination meter to be measured.
The present invention also comprises power supply and supporting wire harness, and power supply is used for the automobile combination instrument test system power supply for CAN.
1) database maintenance
Use software module---CANdb++Editor integrated in CANoe.Carry out database maintenance.The signal list provided according to main engine plants defines step by step to the message in the node of CAN network, node, signal in message.
1) node, message, signal is set up according to order;
For the present invention bus one has 5 node: ABS (antiskid brake subcontrol), EMS (engine controller), IC (instrument), TCU (gearbox control) and virtual instrument.
Message contained by each node, and contained by each message, signal is as shown in the table.
Table 1 node message correspondence table
The Measures compare of establishment node, message, signal is simple.At the object interface in the left side of CANdb++EDiter, Network nodes, Message, Signals is had to classify, the attribute of defined node, message and signal;
2) network topology is set up
In the simulation Setup interface of CANoe, by importing the mode of database, directly can set up network topology.
3) control inerface is set up
Control inerface is mainly used in man-machine interaction.It is exactly the inputting interface of a test condition.
The Panel Designer module in CANoe is used to complete interface.
A, graphics edition interface
B, standard module toolbar
C, parameter hurdle
Design process is each standard module called in A, graphics edition interface in B standard module tool hurdle, then in C parameter hurdle, carries out parameter definition.For rotating speed input, speed of a motor vehicle input, water temperature input, oil consumption input, this kind of most value of gear input imported need call Track Bar (trace bar) standard module; For engine failure, maintenance alerting signal, brake fault etc., this class is done signal and is only had 0/1 two states, needs to call check box standard module; Now do a citing to this two type block to introduce.
Here with the ABS speed of a motor vehicle, example is input as Track Bar (trace bar).
Step1: drag Track Bar (trace bar) standard module to the appropriate location in graphics edition interface; Use the size of mouse adjustment module; Insert a text mark " rotating speed input ".Then the outward appearance of module is determined substantially by this step;
Step2: module parameter is arranged; In control inerface design, main setting area is signal setting district.For speed of a motor vehicle input, fill in 240 (the max speed is set to 240km/h) at Maximum, Minimum fills in 0; At bottom signal attribute filtrator) middle Environment variable, then click Symbol and can eject Parameter choice box, need inside selection database here, the environmental variance set up in advance.Be generally that several times design and environmental variance establishment are synchronously carried out, after this is provided with, just can be changed environmental variance by mouse drag progress bar.In a program calculating is called to this environmental variance.
Setting for check box (check box) is the same with Track Bar (trace bar) module.For engine failure signal:
Unlike in arranging when Option Box is in selection mode, 1 will be put to environmental variance, when Option Box is in nonselection mode, will set to 0 to environmental variance.
4) test comparison interface is set up
Method for building up and the control inerface at test comparison interface are similar, but the control used exports control for vision, and namely when affiliated environmental variance changes, the outward appearance of control can change.The control that this project uses has 3 kinds.The Meter control that speedometer and tachometer gage use respectively; The Switch/Indicator control that signal lamp uses; The LCD Control control that little mileage etc. use.The optimum configurations mode of these 3 controls with introduce roughly the same above.Below briefly introduce.
Meter: dial plate angle of release can be set in attribute column, Green Zone, Huang Qu, red sector scope, set;
LCD Control: need to arrange integer-bit and decimal place;
Switch/Indicator: exemplify as follows for SES Service Engine Soon setting:
State Count writes 2, represents this environmental variance one and has two values that may occur; 0 is filled at Switch Values; 1 to represent these two values be 0, and one is 1. need to call in a picture in Image.Picture is divided into 3 intervals, and the first interval is default value, and second interval is show when environmental variance is Switch Values first value, and the 3rd interval is show when environmental variance is Switch Values second value.So for this setting, as environmental variance LED_MIL==0, Show Picture sky; As environmental variance LED_MIL==1, Show Picture display engine.This completes signal lamp bright/procedure for displaying of simulation of going out.
5) environmental variance is set up
Environmental variance is control inerface, bridge between program and message input and output.
6) be each node writing program
Owing to bus having 5 nodes, so need process separately for each node.
Claims (2)
1., based on the automobile combination instrument test system of CAN, it comprises CAN (7) and CAN interface circuit (8),
It is characterized in that, it also comprises proving installation, and described proving installation inside is embedded with simulated data load module (1), standard meter display module (2), antiskid brake subcontrol (3), engine controller (4), gearbox control (5) and virtual instrument controller (6);
Simulated data load module (1) comprises consecutive variations amount analog module and 0/1 variable quantity analog module;
Consecutive variations amount analog module: for simulating the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change, and vehicle speed signal is sent to antiskid brake subcontrol (3), tach signal, water temperature signal and oil consumption signal are sent to engine controller (4), gear signal are sent to gearbox control (5);
0/1 variable quantity analog module: produce engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal or failure alarm signal for simulating, and produced brake system fault-signal and ABS system failure signal are sent to antiskid brake subcontrol (3); Engine MIL fault-signal and engine SVS fault-signal are sent to engine controller (4) simultaneously; Failure alarm signal is sent to gearbox control module (5);
The brake system fault-signal that antiskid brake subcontrol (3) sends for the vehicle speed signal that receives consecutive variations amount analog module and send and 0/1 variable quantity analog module and ABS system failure signal, and be sent to CAN (7) by the signal received by CAN interface circuit (8);
The engine MIL fault-signal that engine controller (4) sends for tach signal, water temperature signal and oil consumption signal and the 0/1 variable quantity analog module receiving consecutive variations amount analog module and send and engine SVS fault-signal, and the signal received is sent to CAN (7) by CAN interface circuit (8);
The failure alarm signal that gearbox control module (5) sends for the gear signal and 0/1 variable quantity analog module receiving the transmission of consecutive variations amount analog module, and the signal received is sent to CAN (7) by CAN interface circuit (8);
Virtual instrument controller module (6) is for receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by CAN (7); And all signals received are sent to standard meter display module (2);
Standard meter display module (2) is for carrying out display translation by all signals received.
2. based on the automobile combination instrument test method of CAN, it is characterized in that, the method comprises:
The step of simulated data input;
This step comprises:
For simulating the sub-step of the consecutive variations amount simulation of the change of the vehicle speed signal, tach signal, water temperature signal, gear signal and the oil consumption signal that change; This sub-step is also for sending vehicle speed signal, tach signal, water temperature signal, gear signal and oil consumption signal;
For simulating the sub-step of the 0/1 variable quantity simulation producing engine MIL fault-signal, engine SVS fault, brake system fault, the ABS system failure, the AT system failure and fault alarm; This sub-step is also for sending engine MIL fault-signal, engine SVS fault-signal, brake system fault-signal, ABS system failure signal, AT system failure signal and failure alarm signal;
For receiving vehicle speed signal and brake system fault-signal, brake system fault-signal and ABS system failure signal, and by step that the signal received sends;
For receiving tach signal, water temperature signal and oil consumption signal, engine MIL fault-signal and engine SVS fault-signal, and by step that the signal received sends;
For receiving gear signal and failure alarm signal, and by step that the signal received sends;
For receiving the parallel signal of brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal; And by step that the signal received sends;
For receiving vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal, and received all signals are carried out to the step of display translation;
Automobile instrument to be measured receives vehicle speed signal, brake system fault-signal, ABS system failure signal, tach signal, water temperature signal, oil consumption signal, engine MIL fault-signal, engine SVS fault-signal, gear signal and failure alarm signal by receiving CAN (7), and to the step that the signal that automotive meter to be measured shows is observed;
The signal exported in the display of the automobile instrument to be measured of observation and display translation step is contrasted, realizes the test to automobile combination meter to be measured.
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