CN104076814A

CN104076814A - Automobile ECU measurement system based on hardware-in-loop simulation

Info

Publication number: CN104076814A
Application number: CN201410325679.1A
Authority: CN
Inventors: 王献林; 庞博升; 刘志远
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2014-07-09
Filing date: 2014-07-09
Publication date: 2014-10-01

Abstract

The invention discloses an automobile ECU measurement system based on hardware-in-loop simulation, and belongs to the technical field of automobile ECU tests. The automobile ECU measurement system based on hardware-in-loop simulation aims to solve the problems that in an existing test mode of automobile ECUs, the test cost is high and error sources are unclear. According to the automobile ECU measurement system based on hardware-in-loop simulation, tests of a real automobile are converted into the ECU tests in a virtual automobile through the hardware-in-loop simulation technology, the characteristics of the real automobile are simulated through an upper computer and a lower computer, the tests are conveniently and efficiently carried out, the repeatability is good, and many dangerous conditions of the real automobile can be simulated; in the early stage of automobile research and development, the characteristics of the complete automobile are simulated to test the functions and performance of the ECUs, and then ECUs passing the tests are combined to form a complete automobile system. The automobile ECU measurement system based on hardware-in-loop simulation is used for testing of the automobile ECUs.

Description

Vehicle electronic control unit measuring system based on hardware-in-loop simulation

Technical field

The present invention relates to the vehicle electronic control unit measuring system based on hardware-in-loop simulation, belong to vehicle electronic control unit technical field of measurement and test.

Background technology

Along with the widespread use of new and high technology in automobile, increasing electronic control unit (electronic controlunit, ECU) be embedded in automobile, different types of ECU function difference is very large, even similar ECU, also because of manufacturer, vehicle difference in functionality difference to some extent, this becomes the diagnostic test work of ECU to become increasingly complex.

Traditional automobile ECU test, need to be installed to ECU on real vehicle or on stand and test, and under such test pattern, the test that completes an ECU must all realize out by the hardware circuit of other coupled ECU and related software.That is to say that all ECU tests are all in sequence, only have a upper ECU complete and test and pass through, just can carry out the test of next ECU, this causes the construction cycle relatively long, and whole test job can not walk abreast and carry out.And the interconnected test of multiple ECU, be easy to make the mistake, and error source is difficult to search; The stage of error detection is more late, and the cost of paying is just larger, finally may need to consider whether design is reasonable, even breaks original design and starts anew.This obviously can not meet the fast Development requirement of market to product, and such test pattern has also increased the cost of test greatly, and the product competitiveness of company is obviously declined.And some test is to carry out, more dangerous, so must find a kind of efficient, safe method of testing under the limit situation of automobile.

Summary of the invention

The test pattern the present invention seeks in order to solve existing vehicle electronic control unit causes testing cost high, and the indefinite problem of error source provides a kind of vehicle electronic control unit measuring system based on hardware-in-loop simulation.

Vehicle electronic control unit measuring system based on hardware-in-loop simulation of the present invention, it comprises host computer, slave computer and tested electronic control unit,

Host computer sends to slave computer by test case by usb bus by operation control program;

Slave computer comprises that USB turns SPI module, microcontroller module, bus transceiver module, fault simulation module and load simulation module,

Slave computer is turned SPI module and is realized the mutual conversion of usb data and SPI data by USB, USB turns SPI module and is connected by spi bus with microcontroller module,

Microcontroller module is sent request message, controls fault simulation module and communicate external loading or the load faulty of fault simulation and control load analog module simulation electronic control module to tested electronic control unit by bus transceiver module according to the test case receiving; And process host computer send order or the relay of data, the transmitting-receiving of control bus data, the parameter that load simulation is set, unlatching or closing fault analog module;

Bus transceiver module is followed vehicle diagnostics agreement, for detection of correctly response request message of tested electronic control unit;

Fault simulation module, for unlatching or the shutoff of pilot relay, to simulate real vehicle fault, and reads corresponding diagnostic trouble code by bus transceiver module;

Load simulation module is for simulating the external loading of tested electronic control unit, and detect the load driving force of tested electronic control unit, to external loading short circuit processing power and open circuit fault processing power;

Bus transceiver module, fault simulation module and load simulation module are connected with the corresponding interface of tested electronic control unit.

Load simulation module comprises DSP module, power management module, MOSFET power driver module, electric current and voltage sample module and CAN communication module.

Bus transceiver module comprises CAN bus, K bus and LIN bus.

Advantage of the present invention: the present invention adopts hardware-in-loop simulation technology that the test of actual vehicle is converted into the test to ECU in " virtual vehicle ", it carries out emulation by the characteristic of real vehicle jointly with host computer and slave computer, testing of convenience and high-efficiency, and reproducible, can also simulate a lot of dangerous situations of real vehicle.For researching and developing the initial stage at automobile, when not completing car load, there is very important using value, function and performance that it tests each ECU by the characteristic of simulation car load, then ECU test being passed through combines and forms a Full Vehicle System, instead of by various not interconnected through the ECU of test, be easier to misjudgment source; It greatly reduces system development cycle, has saved the test spending in later stage.

Brief description of the drawings

Fig. 1 is the theory diagram of the vehicle electronic control unit measuring system based on hardware-in-loop simulation of the present invention;

Fig. 2 is the schematic block circuit diagram of emulation mainboard.

Embodiment

Embodiment one: below in conjunction with Fig. 1 and Fig. 2, present embodiment is described, the vehicle electronic control unit measuring system based on hardware-in-loop simulation described in present embodiment, it comprises host computer 1, slave computer 2 and tested electronic control unit 3,

Host computer 1 sends to slave computer 2 by test case 1-2 by usb bus by operation control program 1-1;

Slave computer 2 comprises that USB turns SPI module 2-1, microcontroller module 2-2, bus transceiver module 2-3, fault simulation module 2-4 and load simulation module 2-5,

Slave computer 2 is turned SPI module 2-1 and is realized the mutual conversion of usb data and SPI data by USB, USB turns SPI module 2-1 and is connected by spi bus with microcontroller module 2-2,

Microcontroller module 2-2 is sent request message, controls fault simulation module 2-4 and communicate external loading or the load faulty of fault simulation and control load analog module 2-5 simulation electronic control module to tested electronic control unit 3 by bus transceiver module 2-3 according to the test case 1-2 receiving; And process order that host computer 1 sends or the relay of data, the transmitting-receiving of control bus data, the parameter that load simulation is set, unlatching or closing fault analog module 2-4;

Bus transceiver module 2-3 follows vehicle diagnostics agreement, for detection of correctly response request message of tested electronic control unit 3;

Fault simulation module 2-4, for unlatching or the shutoff of pilot relay, to simulate real vehicle fault, and reads corresponding diagnostic trouble code by bus transceiver module 2-3;

Load simulation module 2-5 is for simulating the external loading of tested electronic control unit 3, and detect the load driving force of tested electronic control unit 3, to external loading short circuit processing power and open circuit fault processing power;

Bus transceiver module 2-3, fault simulation module 2-4 are connected with the corresponding interface of tested electronic control unit 3 with load simulation module 2-5.

In present embodiment, slave computer refers to testing apparatus.Described measuring system has mainly realized bus communication test, message monitoring, fault simulation and the simulation of ECU external loading.

Slave computer 2 is made up of emulation mainboard and load simulation, and emulation mainboard is mainly responsible for communicating by letter with host computer, message monitoring, bus communication are tested and ECU fault simulation; Load simulation comprises two parts: load simulation unit and USB turn CAN module, load simulation unit can be controlled by CAN bus by emulation mainboard, also can turn CAN module by USB is directly controlled by host computer 1, load simulation unit is used for simulating the external loading of ECU and some most common failures of load, as load short circuits and load cut-off.In actual test, may need load simulation unit to simulate multiple loads simultaneously, so by load simulation module and the separately design of emulation mainboard module, this modular design has stronger dirigibility, can, according to test needs, connect multiple load simulations unit.Load simulation unit is to change and the gate source voltage Ugs of Voltag driving circuit output mos FET by DA, gather leakage current Id by current detection module, gather drain-source voltage Uds by voltage acquisition module, communicate by CAN transceiver module and emulation mainboard or PC.Electronic load requires adjustable leakage current to change between 0-15A, and precision is 0.1A; Drain-source voltage changes between 0-30V, and precision is 0.1V; Power consumption power changes between 0-180W, and precision is 0.5W.

Emulation mainboard mainly comprises seven parts: power management, MCU control, usb communication, fault simulation, LED instruction, bus data transmitting-receiving and connector, as shown in Figure 2.

Power management module transfers 12V to 5V; MCU communicates by letter with host computer 1 by usb data transceiver module, receives host computer instruction and data, or sends feedback information to host computer; MCU by instruction analysis, obtains the order code that host computer sends, and carries out corresponding operating according to order code, or pilot relay communicates fault simulation, or lights and extinguish LED lamp, or sends request message by bus transceiver to tested ECU; Need external signal to draw by connector.

15765 and 14230 agreements that vehicle diagnostics agreement is formulated as ISO.Fault simulation module 2-4 is relatively simple, can be used to simulate bus short circuit or the open circuit fault of real vehicle; Load simulation module 2-5 is for the external loading of partial simulation ECU, as car light, motor etc.

Embodiment two: present embodiment is described further embodiment one, load simulation module 2-5 comprises DSP module, power management module, MOSFET power driver module, electric current and voltage sample module and CAN communication module.

Present embodiment is controlled leakage current Id by the gate source voltage Ugs that adjusts MOSFET, makes leakage current follow the tracks of predetermined curve.Supposing that drain-source voltage is Uds, is normal value if keep Uds/Id, is constant-resistance load; If keeping Id is that normal value is Constant Current Load; If keep Uds constant, it is constant voltage load; If keeping Uds*Id is normal value, is constant power load.

Embodiment three: present embodiment is described further embodiment one or two, bus transceiver module 2-3 comprises CAN bus, K bus and LIN bus.

Claims

1. the vehicle electronic control unit measuring system based on hardware-in-loop simulation, is characterized in that, it comprises host computer (1), slave computer (2) and tested electronic control unit (3),

Host computer (1) sends to slave computer (2) by test case (1-2) by usb bus by operation control program (1-1);

Slave computer (2) comprises that USB turns SPI module (2-1), microcontroller module (2-2), bus transceiver module (2-3), fault simulation module (2-4) and load simulation module (2-5),

Slave computer (2) is turned SPI module (2-1) and is realized the mutual conversion of usb data and SPI data by USB, USB turns SPI module (2-1) and is connected by spi bus with microcontroller module (2-2),

Microcontroller module (2-2) according to the test case (1-2) receiving by bus transceiver module (2-3) to tested electronic control unit (3) send request message, control fault simulation module (2-4) communicates external loading or the load faulty of fault simulation and control load analog module (2-5) simulation electronic control module; And process host computer (1) send order or the relay of data, the transmitting-receiving of control bus data, the parameter that load simulation is set, unlatching or closing fault analog module (2-4);

Bus transceiver module (2-3) is followed vehicle diagnostics agreement, for detection of correctly response request message of tested electronic control unit (3);

Fault simulation module (2-4), for unlatching or the shutoff of pilot relay, to simulate real vehicle fault, and reads corresponding diagnostic trouble code by bus transceiver module (2-3);

Load simulation module (2-5) is for simulating the external loading of tested electronic control unit (3), and detect the load driving force of tested electronic control unit (3), to external loading short circuit processing power and open circuit fault processing power;

Bus transceiver module (2-3), fault simulation module (2-4) and load simulation module (2-5) are connected with the corresponding interface of tested electronic control unit (3).

2. the vehicle electronic control unit measuring system based on hardware-in-loop simulation according to claim 1, it is characterized in that, load simulation module (2-5) comprises DSP module, power management module, MOSFET power driver module, electric current and voltage sample module and CAN communication module.

3. the vehicle electronic control unit measuring system based on hardware-in-loop simulation according to claim 1 and 2, is characterized in that, bus transceiver module (2-3) comprises CAN bus, K bus and LIN bus.