CN106899372B - A kind of real-time synchronization method of fuel cell car power performance test system - Google Patents
A kind of real-time synchronization method of fuel cell car power performance test system Download PDFInfo
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- CN106899372B CN106899372B CN201710019650.4A CN201710019650A CN106899372B CN 106899372 B CN106899372 B CN 106899372B CN 201710019650 A CN201710019650 A CN 201710019650A CN 106899372 B CN106899372 B CN 106899372B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Abstract
The present invention relates to the real-time synchronization methods that a kind of fuel cell car power performance tests system, synchronous synchronous with data into row clock to the communication network to fuel cell car power performance test system, include the following steps：1) communication network of structure fuel cell car power performance test system；2) use NTP network synchronization methods that the clock of all devices node in communication network is made to synchronize；3) communication network is configured on hardware and software respectively, and formulates sync identification rule so that the data of entire communication network synchronize.Compared with prior art, the present invention has many advantages, such as to make overall plans, various communications protocols, meets load requirement, distributed network.
Description
Technical field
The present invention relates to fuel cell car technical field of measurement and test, more particularly, to a kind of Fuel Cell Vehicle Powertrain
The real-time synchronization method of dynamic characteristics measuring instrument device system.
Background technology
The chemical energy of fuel is converted into electric energy by fuel battery energy, has higher generating efficiency.Meanwhile fuel electricity
Pond is substantially better than the scheme of a large amount of harmfulness exhaust gas of engine exhaust by way of the energy, and emission major part is water.Cause
This, fuel cell car has fuel economy more better than conventional fuel oil automobile and the feature of environmental protection, has become modern and not
Carry out development of automobile inevitable choice, research and development also have become the hot spot of automobile industry.
The test method of Fuel Cell Vehicle Powertrain is to ensure its important support successfully developed.Current technology is existing
Shape shows both at home and abroad the Fuel Cell Vehicle Powertrain dynamic characteristics measuring instrument device of complete set not yet, in complex instrument
In the research and realization of the real-time synchronization method of system, it is even more in the starting stage.Therefore, it is based on fuel cell car dynamical system
It unites dynamic characteristics measuring instrument device, needs to develop a kind of the real-time of Fuel Cell Vehicle Powertrain dynamic characteristics measuring instrument device system
Synchronous method.
Chinese patent CN103067148A provides a kind of hardware synchronization method between cascading instrument, and this method is by more
The main control module of instrument carries out information exchange by Ethernet, and the position according to the link in tandem connected into via synchronization module is suitable
Sequence distributes address, confirms the instrument that first position is in link；When need synchronize, the main control module of first position instrument
Synchronous configuration requirement is sent out to the main control module of other positions instrument by Ethernet, and the synchronization module into the instrument is sent out
Synch command；Other instruments main control module receives synchronous configuration requirement by Ethernet, completes the synchronous configuration of instrument, simultaneously should
Synchronization module in instrument receives synchronous input signal, clock input signal by input signal cable；By same in the instrument
After walking resume module, synchronization output signal, clock output signal are sent out by output signal line all the way；Another way introduces
To instrument, other functional circuits synchronize operation, to the synchronization of all appts in final realization system.
Chinese patent CN102591996A provides a kind of data synchronous architecture and method for multi-section measuring instrument, makes
Multi-section measuring instrument, which can be connected with each other into row of channels, to be expanded, wherein a measuring instrument, which is master control formula weight, surveys instrument, other portions
Measuring instrument is then passive type measuring instrument, and the main control type measuring instrument can export sync signal to the passive type measurement instrument
In device, the passive type measuring instrument is set to sample the label that the sync signal is synchronized as data, and deposit in memory,
In addition again by all measuring instrument memories data and flag transmission to a processing platform, and it is built-in through the processing platform
Software the passive type measuring instrument is adjusted to the consistent data waveform length of the main control type measuring instrument, so as to solve because amount
Instrument time-pulse error itself is surveyed, caused sampled data length is solved and differs, it can not multi-section measuring instrument data synchronization processing
The problem of.
Though the above patent is related to the real-time synchronization between instrument, network structure is relatively simple, pertains only to mostly single
Network is not involved with the application of reflective memory, and without occurring for Fuel Cell Vehicle Powertrain test equipment
Synchronous method.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to make overall plans, a variety of
Communication protocol, meet load requirement, distributed network fuel cell car power performance test system real-time synchronization method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of real-time synchronization method of fuel cell car power performance test system, to fuel cell car power
The communication network of Performance Test System is synchronous with data into row clock synchronization, includes the following steps：
1) communication network of structure fuel cell car power performance test system；
2) use NTP network synchronization methods that the clock of all devices node in communication network is made to synchronize；
3) communication network is configured on hardware and software respectively, and formulates sync identification rule so that entire communication network
Data synchronize.
In the step 1), the communication network that fuel cell car power performance tests system is star distributing communication
Network, including system coordination management subnet, core test business subnet, data transmission and processing subnet, vehicle-mounted compatible subnet and
Test equipment control area net(CAN), the system coordination management subnet use ethernet communication, core to test business subnet and use
MODBUS is communicated, and data transmission and processing subnet are communicated using reflective memory interchanger, and vehicle-mounted compatible subnet uses CAN communication,
Test equipment control area net(CAN) is communicated by EtherCat.
Node in the communication network of the described fuel cell car power performance test system includes：
Fuel battery engines vehicle test module monitors computer, fuel cell system emulation module computer, fuel
Battery system emulation module executes computer, fuel battery engines vehicle test module power controling machine cabinet, integrated instrument master
Control modular computer, database work station, the execution of integrated instrument main control module model execution computer, integrated instrument master control in real time
Module bus data processing executes computer, fuel battery engines vehicle test module executes computer, electric drive matching is surveyed
It tries modular computer, fuel battery engines matching test and attachment test module and executes computer, pile matching test module
Computer, noise circumstance modular computer, vibration environment modular computer, temperature humidity pressure environment modular computer, fuel
Battery engine matching test executes real-time computer with attachment test module model and fuel battery engines vehicle tests mould
Block EtherCAT communicates real-time computer.
The database work station is monitored respectively with fuel battery engines vehicle test module by Ethernet and is calculated
Machine, fuel cell system emulation module computer, fuel cell system emulation module execute computer, integrated instrument main control module
Computer, integrated instrument main control module model execute and execute computer in real time, the processing of integrated instrument main control module bus data is held
Row computer, fuel battery engines matching test and attachment test module model execute real-time computer, pile matching test
Modular computer, noise circumstance modular computer, vibration environment modular computer and temperature humidity pressure environment modular computer
Communication, the electric drive matching test modular computer are tested with dynamometer machine, fuel battery engines matching test and attachment
Modular model executes between real-time computer and fuel battery engines matching test and attachment test module execution computer
It is communicated by MODBUS, the fuel battery engines matching test executes computer with attachment test module and tested with attachment
Testing stand sensor, fuel cell system emulation module execute to be passed through between computer and fuel cell car onboard sensor
CAN communication, the reflective memory interchanger execute with integrated instrument main control module model execute computer, fuel in real time respectively
Battery system emulation module executes computer, fuel battery engines vehicle test module executes computer and fuel cell powered
Machine matching test executes real-time computer communication, the electric drive matching test modular computer with attachment test module model
Computer is executed with the processing of integrated instrument main control module bus data, fuel battery engines vehicle test module executes computer
It is communicated by EtherCat between fuel battery engines vehicle test module EtherCAT communication real-time computers.
In the step 2), NTP Network Synchronizations use customer end/server mode.
In the step 3), the hardware configuration of communication network is：
Integrated instrument main control module model in communication network executes executes computer using NI RTOS operations system in real time
System, and all computer nodes in communication network are all made of NI VeriStand engines.
In the step 3), the software configuration of communication network is：
It is delicate timing cycle that multiple precision, which are arranged, in NI VeriStand engines, and uses multi-cycle framework.
In the step 3), sync identification rule includes：
1, the fuel battery engines vehicle test module of communication network is monitored into computer as the service of network communication
Device and database, data therein with set form and register address ModBUS, reflective memory, ethercat, CAN and
Communicated on Ethernet, set form include data check and communication protocol inherent feature, and the data of application layer by
Time tag and effective time composition；
2, the processing of integrated instrument main control module bus data executes validity of the computer check per segment data, and is based on
The redundancy of communication network is mutually verified；
3, all nodes in task status send heartbeat signal and update heartbeat signal and shape in communication network
State identifies.
Compared with prior art, the present invention has the following advantages：
One, it makes overall plans：A kind of fuel is provided the invention aims to overcome the problems of the above-mentioned prior art
The real-time synchronization method of battery car dynamical system dynamic characteristics measuring instrument device system, this method are planned as a whole in entire test system
Instrument and detected element, and model running and communication speed requirement are taken into account, it is the exploitation and survey of Fuel Cell Vehicle Powertrain
Examination provides synchronism guarantee.
Two, various communications protocols：The demand of fuel cell automobile dynamic system dynamic performance testing of the present invention, for
Different test objects and test equipment has used the different communications protocol such as Ethernet, reflective memory, CAN, EtherCat,
Meet the physical characteristic of measurand and test equipment.
Three, meet load requirement：It is surveyed for different communications protocol and entire Fuel Cell Vehicle Powertrain dynamic property
Test instrument, the clock synchronization rules of design can fully meet the requirement under system big data load condition.
Four, distributed network：The basic network framework of the present invention is star-like distributed network, and software platform is in common software
On the basis of secondary development, contribute to the expansion of system.
Description of the drawings
Fig. 1 is the schematic network structure that fuel cell car power performance tests system communication network.
Fig. 2 is sync identification method flow diagram.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
The present invention provides a kind of real-time synchronization method of Fuel Cell Vehicle Powertrain dynamic characteristics measuring instrument device system,
This method plans as a whole the test equipment in whole system and detected element, and takes into account model running and communication speed requirement, is fuel
The exploitation of battery car dynamical system and test provide synchronism guarantee, the network structure of the test instrument system as shown in Figure 1,
Internal nodename and function is as shown in table 1.
1 fuel cell car power performance of table tests the nodename and function of system communication network internal
This Design of Test System mainly uses star distribution Ethernet network construction form, will pass through standard ethernet in experiment
Each business unit is linked together.The Functional Module being connected to integrated instrument main control module by Ethernet interconnecting interface
It includes：Control simulation synthetic instrument main control module, the data acquisition function module of fuel battery engines experimental system, load control
With analogue system, fuel battery engines verify system, fuel cell pile experimental system, fuel cell experimental system and
Electric drive test function module.For the rate and synchronism of guarantee data transmission, we use reflection in the interaction of model data
The scheme of memory interacts the simulation calculation equipment of all high speed data transfers by reflective memory interchanger.Pass through reflective memory
Interconnecting interface includes with the function module that is connected to of control simulation synthetic instrument main control module：Fuel battery engines experimental system,
Load control and analogue system, fuel battery engines verify system.EtherCAT network is synchronous compared to Ethernet
Property has large increase, therefore in some internal systems, using EtherCAT nets.Data between different sub-network pass through gateway section
Point computer is unified to be uploaded in whole system, while devising host handle dedicated for signal of communication, and supervision is respectively
A gateway and whole network system.
Key node in Design of Network Communication is communication center equipment MR03, as the Rendezvous Point of all communication nodes,
Network status can be monitored and evaluated with all webs' watch data cases.Each communication networking forms Star Network connecting node and exchanges
Valid data are distributed to each node by machine by own node effect.
The detailed process of the present invention is as follows：
First, it is dynamic to construct Fuel Cell Vehicle Powertrain for the testing requirement based on Fuel Cell Vehicle Powertrain
The communication architecture and network topology of state performance testing apparatus, as shown in Figure 2.The communication architecture includes system coordination network, business
Core network, data core network, vehicle-mounted compatible network and equipment control area net(CAN).Wherein, system coordination network uses ether
Netcom interrogates, and business core network is communicated using MODBUS；Communication and fuel cell hair of the data core network for model data
The communication of motivation test data, it is more demanding to real-time property, therefore using the communication modes of reflective memory；Vehicle-mounted compatible net
Network uses CAN communication；Equipment control area net(CAN) network is the high-speed equipments such as dynamometer machine and server and the communication network of master control system
Network is communicated using EtherCat.
Later, system application NTP (Network Time Protocol, Network Time Protocol) network synchronization technique.
NTP is the time synchronization protocol defined by RFC 1305, for carrying out the time between Distributed Time server and client side
It is synchronous.NTP is transmitted based on UDP messages, and the UDP port number used is 123.Purpose using NTP is to owning in network
Equipment with clock is synchronized into row clock, so that the clock of all devices in network is consistent, to enable a device to provide
A variety of applications based on unified time.For the local system of operation NTP, the synchronization from other clock sources can be both received,
Other clocks can be synchronized as clock source again, and can be mutually synchronized with other equipment.
Equipment may be used a variety of NTP operating modes and carry out time synchronization, select " customer end/server mode " here
(Client/Server-C/S).In customer end/server mode, user end to server tranmitting data register sync message, message
In Mode fields be set as 3 (user models).Server end can automatically operate in server mode after receiving message, and send
Response message, the Mode fields in message are set as 4 (server modes).After client receives response message, into row clock mistake
Filter and selection, and it is synchronized to preferred server.
Then, system real time guarantee and design are carried out.Under normal circumstances, an operating system (operating system) is responsible for
The application program for managing the hardware resource of computer and running on computers.Here the hardware supported system of NI RT is used
PXI, operating system select NI RTOS, real-time that can fully verify the closed loop cycle that performance is better than 1ms.Operating system master
It is deployed in MR01-03 node computers, wherein MR03 finally will produce the judgement of communication data and system mode and examine
Disconnected strategy and fault message, instruct coordination system to solve current problem.
Secondly, implement management configuration layer in real-time testing using real time operating system as a part for test system.With
It is compared using the general-purpose operating system, it is to need to realize higher reliability and higher to push the most common demand of real-time testing system
Performance.NI VeriStand engines are non-visible execution mechanisms, are responsible for executing Hardware I/O, model, process, early warning and are being
System defines other fixed test system tasks of document.Engine not only controls the timing of whole system, and controls NI
Communication between VeriStand engines and the host of workspace.The NIVeriStand engine distributions are in all node computers
In.
NI VeriStand engines include multiple timing cycles, execute timing and are controlled by hardware event, precision is microsecond.
Certainty core buffer provides communication between different cycle tasks, will not cause data dithering in engine execution.Using more
Framework is recycled, NI VeriStand engines are utilized the advantage of multi-core processor parallel processing capability, improve systematicness naturally
Energy.When establishment system defines, it is included in the ability selected between high-throughput, concurrency and low delay, sequential organization, can configures
A variety of different engines execute setting.
Finally, the design of time service method and rule is synchronized.Whole system time service work is basic design, is related to
Many critical datas synchronize.Time service work includes mainly following partial service：Time calibration in network agreement is supported；Time marks；It is synchronous
Clock (heartbeat pulse).
DB01, which as the server of network communication and database location is mainly responsible for server and builds, to be stored with data
Function.Data are transmitted with set form and register address in ModBUS, reflective memory, ethercat, CAN and Ethernet,
Include data check and agreement inherent feature in format, is all made of time tag and effective time per segment data in application layer.
MR03 verifications are verified per segment data from validity and mutually, and redundancy of the mutual checking procedure based on network design is simultaneously
Heartbeat pulse is returned by bus in system state, heartbeat pulse is the important indicator of system synchronicity and activity, and this system is set
The execution host in task status will send heartbeat signal in meter；The task host of every access system will also update heartbeat
Signal and status indicator.
Claims (7)
1. a kind of real-time synchronization method of fuel cell car power performance test system, to fuel cell car dynamic property
The communication network that system can be tested is synchronous with data into row clock synchronization, which is characterized in that includes the following steps：
1) communication network of structure fuel cell car power performance test system, in the step 1), fuel cell car
The communication network that power performance tests system is star distributing communication network, including the test of system coordination management subnet, core
Business subnet, data transmission and processing subnet, vehicle-mounted compatible subnet and test equipment control area net(CAN), the system coordination pipe
Managing subnet uses ethernet communication, core to test business subnet and communicated using MODBUS, and data transmission and processing subnet are using anti-
Memory switch communication is penetrated, vehicle-mounted compatible subnet uses CAN communication, test equipment control area net(CAN) to be communicated by EtherCat；
2) use NTP network synchronization methods that the clock of all devices node in communication network is made to synchronize；
3) communication network is configured on hardware and software respectively, and formulates sync identification rule so that the number of entire communication network
According to synchronization.
2. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 1, special
Sign is that the node in the communication network of fuel cell car power performance test system includes：
Fuel battery engines vehicle test module monitors computer (DB01), fuel cell system emulation module computer
(HB01), fuel cell system emulation module executes computer (HR01), fuel battery engines vehicle test module power supply control
Cabinet (DP01) processed, integrated instrument main control module computer (MB01-13), database work station (DA01), integrated instrument master control
Modular model executes and executes computer (MR01-02) in real time, the processing of integrated instrument main control module bus data executes computer
(MR03), fuel battery engines vehicle test module executes computer (DR01), electric drive matching test modular computer
(AB01-02), fuel battery engines matching test executes computer (RR11-13) with attachment test module, pile matches survey
Try modular computer (FB01-02), noise circumstance modular computer (WS01), vibration environment modular computer (WS02), temperature
Humidity stress environment module computer (WS03), fuel battery engines matching test and attachment test module model execute real-time
Computer (RR01) and fuel battery engines vehicle test module EtherCAT communication real-time computers (DR02-03).
3. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 2, special
Sign is that the database work station (DA01) is monitored with fuel battery engines vehicle test module respectively by Ethernet
Computer (DB01), fuel cell system emulation module computer (HB01), fuel cell system emulation module execute computer
(HR01), integrated instrument main control module computer (MB01-13), integrated instrument main control module model execute executes computer in real time
(MR01-02), integrated instrument main control module bus data processing executes computer (MR03), fuel battery engines matching test
Real-time computer (RR01), pile matching test modular computer (FB01-02), noise ring are executed with attachment test module model
Border modular computer (WS01), vibration environment modular computer (WS02) and temperature humidity pressure environment modular computer (WS03)
Communication, the electric drive matching test modular computer (AB01-02) and dynamometer machine, fuel battery engines matching test with
Attachment test module model executes real-time computer (RR01) and is held with fuel battery engines matching test and attachment test module
It is communicated by MODBUS between row computer (RR11-13), the fuel battery engines matching test is tested with attachment
Module executes computer (RR11-13) and executes computer with the test bed sensor of attachment, fuel cell system emulation module
(HR01) by CAN communication between fuel cell car onboard sensor, the reflective memory interchanger respectively with it is comprehensive
It closes instrument main control module model and executes execution computer (MR01-02), fuel cell system emulation module execution computer in real time
(HR01), fuel battery engines vehicle test module execute computer (DR01) and fuel battery engines matching test with it is attached
Part test module model executes real-time computer (RR01) and communicates, the electric drive matching test modular computer (AB01-
02) computer (MR03), fuel battery engines vehicle test module are executed with the processing of integrated instrument main control module bus data
Execute computer (DR01) and and fuel battery engines vehicle test module EtherCAT communication real-time computers (DR02-03)
Between communicated by EtherCat.
4. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 1, special
Sign is, in the step 2), NTP Network Synchronizations use customer end/server mode.
5. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 3, special
Sign is, in the step 3), the hardware configuration of communication network is：
Integrated instrument main control module model in communication network executes execution computer in real time and uses NI RTOS operating systems,
And all computer nodes in communication network are all made of NI VeriStand engines.
6. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 3, special
Sign is, in the step 3), the software configuration of communication network is：
It is delicate timing cycle that multiple precision, which are arranged, in NI VeriStand engines, and uses multi-cycle framework.
7. a kind of real-time synchronization method of fuel cell car power performance test system according to claim 3, special
Sign is, in the step 3), sync identification rule includes：
1) using the fuel battery engines vehicle test module of communication network monitoring computer as the server of network communication with
Database, data therein with set form and register address ModBUS, reflective memory, ethercat, CAN and
Communicated on Ethernet, set form include data check and communication protocol inherent feature, and the data of application layer by
Time tag and effective time composition；
2) processing of integrated instrument main control module bus data executes validity of the computer check per segment data, and based on communication
The redundancy of network is mutually verified；
3) all nodes in task status send heartbeat signal and update heartbeat signal and state mark in communication network
Know.
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| CN115052023A (en) * | 2022-08-15 | 2022-09-13 | 理工雷科智途(北京)科技有限公司 | Advanced driver assistance system data transmission method and device |
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| CN102514576A (en) * | 2011-11-28 | 2012-06-27 | 浙江网新技术有限公司 | On-board intelligent equipment of high-speed train |
| CN102706564A (en) * | 2012-06-21 | 2012-10-03 | 株洲中达特科电子科技有限公司 | Motor test system and control method for electric vehicle |
| CN103207084A (en) * | 2012-01-16 | 2013-07-17 | 同济大学 | Dynamic performance testing system for fuel cell automobile power system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514576A (en) * | 2011-11-28 | 2012-06-27 | 浙江网新技术有限公司 | On-board intelligent equipment of high-speed train |
| CN103207084A (en) * | 2012-01-16 | 2013-07-17 | 同济大学 | Dynamic performance testing system for fuel cell automobile power system |
| CN102706564A (en) * | 2012-06-21 | 2012-10-03 | 株洲中达特科电子科技有限公司 | Motor test system and control method for electric vehicle |
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