The content of the invention
The present invention solves the technical problem of a kind of EPS controller tests system and device is provided, mainly to EPS controlsDevice carries out the test of fabrication stage, calibration with current signal, functional test, the test of power-assisted curve and durable test, with simple structure, intoThe advantages of this low, highly versatile, testing efficiency and measuring accuracy high, while position of failure point can be navigated to accurately, it is easy toLater period maintenance.
In order to solve the above technical problems, one aspect of the present invention is：There is provided a kind of EPS controller testsSystem and device, including computer, signal generator circuit plate module, fictitious load and communication module, described computer lead toCross signal generator circuit plate module to be connected with fictitious load, described computer is also connected with communication module, by instituteThe fictitious load and communication module stated are connected with the EPS controllers of outside.
In a preferred embodiment of the present invention, described signal generator circuit plate module includes power supply, signal acquisitionDevice, communication device and signal generator, described communication device are communicated using LINBUS.
In a preferred embodiment of the present invention, described fictitious load includes cabinet, the 0.1R being arranged in cabinetThe gold resistance of 500W, LEM current sensors, FL-2 current diverters, 85C1-A pointers ammeter and it is arranged on outside cabinetThe outside connector and heat abstractor in portion.
In a preferred embodiment of the present invention, described signal generator circuit plate module and fictitious load are integrated inIn one cabinet.
In a preferred embodiment of the present invention, described communication module is communicated using CAN communication K_BUS.
In a preferred embodiment of the present invention, described computer, signal generator circuit plate module, fictitious load andIt is connected with EPS controllers by wire harness between communication module.
In a preferred embodiment of the present invention, described EPS controller tests system and device also includes test software mouldBlock, described test software module includes test program and test supervisor program.
The beneficial effects of the invention are as follows：EPS controller tests system and device of the invention, is mainly carried out to EPS controllersThe test of fabrication stage, calibration with current signal, functional test, power-assisted curve test and durable test, with simple structure, low cost,The advantages of highly versatile, testing efficiency and measuring accuracy high, while position of failure point can be navigated to accurately, it is easy to the later stage to tie upRepair.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementationExample is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is commonAll other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protectionEnclose.
As shown in figure 1, the embodiment of the present invention includes：
A kind of EPS controller tests system and device, including computer, signal generator circuit plate module, fictitious load and logicalNews module, described computer is connected by signal generator circuit plate module with fictitious load, described computer also withCommunication module is connected, and is connected with the EPS controllers of outside by described fictitious load and communication module.Wherein, it is describedComputer, signal generator circuit plate module, be connected with EPS controllers by wire harness between fictitious load and communication moduleConnect.
As shown in figure 3, described signal generator circuit plate module includes power supply, signal picker, communication device and letterNumber generator, described communication device is communicated using LINBUS.As shown in fig. 6, described fictitious load includes cabinet, is arranged onThe gold resistance of the 0.1R 500W in cabinet, LEM current sensors, FL-2 current diverters, 85C1-A pointers ammeter andIt is arranged on outside connector and heat abstractor outside cabinet.
Wherein, described signal generator circuit plate module and fictitious load are integrated in a cabinet, make operation andSimple processing.
Further, described communication module is communicated using CAN communication K_BUS.
In the present embodiment, described EPS controller tests system and device also includes test software module, and described test is softPart module includes test program and test supervisor program, and test program control signal generator circuit board module carries out data outputAnd data acquisition；Test supervisor program mainly completes the realization of the data display and human-computer interaction interface of test system.
The main test that the fabrication stage is carried out to EPS controllers of the invention, the functional characteristic design test side according to productMethod to its each test item detect mainly includes single-board testing, calibration with current signal, and functional test, power-assisted curve are tested and durableTest, and test result is compared with qualified index, finally judge whether product meets requirement of dispatching from the factory, if faulty itemPositioning accurately can be carried out to trouble point and facilitate later period maintenance, and test result is sent to host computer by CAN.
EPS controller tests system and device is made up of hardware and software two parts.
Hardware components include：Computer, signal generator circuit plate module, fictitious load module and interface wire harness and logicalNews module；Computer is data processing and the transmission maincenter of test system, while being also the operation platform of test software；Signal is sent outRaw device circuit board module is the input/output function of the required process signal for simulating EPS controllers；CAN communication and LINBUS are communicatedModule realizes the communication test and data transfer between computer and EPS controllers；Fictitious load main analog EPS controllersLoad environment.
Software section includes：Test program and test supervisor program, test program control signal generator circuit board moduleCarry out data output and data acquisition；Test supervisor program mainly completes the data display and human-computer interaction interface of test systemRealize.
EPS controller tests apparatus system mainly carries out single-board testing to EPS controllers, and calibration with current signal, functional test is helpedForce curve is tested and durable test；Wherein, single-board testing is mainly tested input and output signal：Including GES,Engine rotational speed signal, ignition signal, torque signal, angular signal, failure modulating signal, failure enable/idle signal, electric current inspectionSurvey and PWM detections；Functional test includes calibration with current signal, protection test；Signal is finally sent to EPS controls by IED interfaces；The general frame is as shown in Figure 2.
Single-board testing is carried out to EPS controllers signal generator circuit plate module is mainly sent instructions to by host computer,Simulate the vehicle body signal processed needed for EPS controllers by signal generator circuit plate module carries out controlling EPS to EPS controllersDevice processed is tested to be compared the result of test with setting value, and the result of test is sent to host computer by CAN communication,Processed if trouble point can accurately navigate to position of failure point by host computer, be easy to later period maintenance.
Circuit in signal generator circuit plate module is as shown in Figure 3：
（1）Communicating circuit is mainly CAN and K_BUS communications；
（2）Signal acquisition circuit is gathered including voltage and current；
（3）Torque signal process circuit includes the switching circuit that circuit and moment of torsion form occur of torque signal；
（4）GES process circuit；
（5）Rotation speed signal processing circuit of engine；
（6）Sound light alarming circuit and idle signal process circuit also some reserved circuits are tested to increase later when breaking downAs long as project prepares change, software phase lock loop is improved；
（7）EPS controllers protect test circuit, mainly simulated failure to be input to EPS controllers and see whether it can be automatically intoProtected mode.
Moment of torsion form switching circuit is mainly current mode torque signal, analogue type moment of torsion in signal generator circuit plate moduleSwitching between signal and PWM type torque signals, it passes through software detection moment of torsion type and then switches over reality by relayExisting mode is as shown in Figure 4.Protection test circuit is mainly simulated failure test is carried out to EPS controllers sees whether it can examine automaticallySurvey enters into protected mode, and these three failures switch over to realize as shown in Figure 4 by relay.
Calibration with current signal is carried out to EPS controllers, functional test and protection are tested：
（1）The process of calibration with current signal is that host computer sends instructions to signal generator circuit, and signal generator circuit output is correspondingDutycycle to EPS controllers, EPS controllers are by judging the size output current of dutycycle come driving load, synchronous signalThere is the electric current and voltage in circuit collection load, setting value is compared by specific function program and is judged with the relation of detected valueWhether this test system output current can reach requirement, ready to carry out functional test；
（2）The process of functional test is that host computer sends instructions to signal generator circuit, and signal generator circuit output is correspondingTorque signal to EPS controllers, EPS controllers export corresponding electric current come driving load by judging torque signal, whileElectric current and voltage in signal generating circuit collection load, the relation of setting value and detected value is compared by specific function programJudge the quality of EPS controllers；
（3）The process for protecting test is that host computer sends instructions to signal generator circuit, and signal generator circuit is simulatedFailure is input to EPS controllers and carries out test sees whether it can detect these failures automatically into protected mode.To speedIts main way of realization of signal, engine rotational speed signal, torque signal, angular signal, failure modulating signal is these signals and electricitySource, ground short circuit and open circuit Three models, CAN are shorted with each other fault mode.
Relation of the power-assisted curve test mainly between test speed and torque：
Signal generator circuit is sent instructions to by host computer, signal generator circuit exports different GESs to EPSController, EPS controllers export different torques come driving load by judging different GESs, and synchronous signal occurs electricityElectric current and voltage in the collection load of road, compare setting value and judge product with the relation of detected value by specific function programIt is good and bad.
Such as power-assisted curve test process
Necessary exact p-value frock power supply opening before power-assisted curve experiments, module is connected normally with frock, and modular power source connectsConnect, also ValueCan is connected with frock.”
The first step：The configuration data in experimental configuration data interface.Need to fill in speed ratio, in addition it is also necessary to fill in the car for needing testSpeed, and curve symmetry and maximum current scope.Filling in parameter has two methods, and one is to fill in manually, and two is to lead automaticallyEnter data.Fill in need after the completion of data to perform following " second step " manually and operate.The method of automated import of data is to click " to leadEnter data " button, open file dialogs are then ejected, it is necessary to respective items purpose data excel files, we load hereIt is " xxxxx " file；
Second step：" power-assisted curve experiments " interface is switched to, it is necessary to carry out " power-assisted curve " experiment, " starting test " is clicked and is pressedButton, software can be tested automatically.If necessary to stop testing, then " stopping test " button is clicked；
3rd step：The data tested can be automatically saved in software with the file of " xxxxx " under catalogue.
EPS controller tests system and device technical problem to be solved of the invention：
（1）For baroque problem in the prior art, be embedded in cabinet for MCU control panels, fictitious load by this test systemSimplify structure；
（2）For the problem of prior art high cost, signal is extracted and directly controlled with EPS by this test system by aviation plugDevice signaling interface processed connection, as long as being dropped by the wire harness all right product clamper that eliminates of transferring for the EPS controllers of distinct interfaceLow cost；
（3）For prior art testing efficiency and the aspect of versatility, this test system is in signal generator circuit plate moduleIncreased the compatible various EPS controllers of unlike signal type switching circuit；
（4）For prior art measuring accuracy aspect, this test system will be first sent the commands to this test system by host computerSystem carries out calibration with current signal, can also carry out functional test after calibration with current signal is qualified to EPS controllers, and calibration with current signal is usedThe LEM sensors that two-way measuring accuracy reaches 1% are sampled, and are increased in terms of measuring accuracy；
（5）By this test system not only can to the electric signal of pin under different working condition, test CAN communication functions,Test EPS controller signals resetting times, transit time whether reach carried out in prescribed limit test can also be to EPS controlsDevice does durable test, and the test of power-assisted curve and protection test solve the problems, such as that prior art test item is not complete.
EPS controller tests system and device of the invention advantage compared with prior art：
1. versatility：The compatible various EPS controls of unlike signal type switching circuit are increased in signal generator circuit plate moduleDevice processed；For example：The signal of torque sensor output has three types, current mode torque signal, analogue type torque signal, PWM typesTorque signal, devises the circuit to that can automatically switch between three kinds of torque signals；
2. the raising of testing efficiency：In a test system except single-board testing, be also add outside calibration with current signal and functional test and helpedForce curve is tested and durable test, can test multinomial on a platform, and the prior art that compares improves testing efficiency；
3. measuring accuracy is improved：This test system carries out test to EPS controllers must be carried out in sequence, first EPS be controlledDevice processed carries out after single-board testing passes through, then sending the commands to carry out calibration with current signal, electric current to this test system by host computerDemarcate it is qualified after can just carry out functional test to EPS controllers, functional test can just carry out power-assisted curve and resistance to after passing throughTest long, and two-way measuring accuracy is employed to calibration with current signal reach 1% LEM sensors and sample, in measuring accuracy sideFace increases；
4. the saving of raw material and operation：Measured signal is all guided in signal generator circuit plate module IED interfaces, use lineBeam is connected on EPS controllers and instead of fixture, reduces cost；
5. signal generator circuit plate module, fictitious load are all integrated in a cabinet makes operation and simple processing；
6., as long as being clicked on after pair EPS controllers are tested and EPS controllers are connected with test device wiring and being connected equipment, it isSystem is automatic to carry out testing and control simplicity to EPS controllers.
In sum, EPS controller tests system and device of the invention, mainly carries out the fabrication stage to EPS controllersTest, calibration with current signal, functional test, the test of power-assisted curve and durable test, with simple structure, low cost, highly versatile, surveyThe advantages of examination efficiency and measuring accuracy high, while position of failure point can be navigated to accurately, it is easy to later period maintenance.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hairEquivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necksDomain, is included within the scope of the present invention.