CN104881329A - Battery assembly offline detection platform multithreading time synchronization method - Google Patents
Battery assembly offline detection platform multithreading time synchronization method Download PDFInfo
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- CN104881329A CN104881329A CN201410069587.1A CN201410069587A CN104881329A CN 104881329 A CN104881329 A CN 104881329A CN 201410069587 A CN201410069587 A CN 201410069587A CN 104881329 A CN104881329 A CN 104881329A
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Abstract
The invention provides a battery assembly offline detection platform multithreading time synchronization method. A battery assembly offline detection platform generates verification signals through hardware and provides the verification signals to a battery assembly, data acquired by the battery assembly is read through CAN communication, after the output/input data is compared, whether each function of the battery assembly reach the standard or not is judged. Synchronous operation of a signal generation thread and a CAN communication thread of the battery assembly offline detection platform is hard to achieve, data comparison errors are liable to occur, and the detection result is unqualified. Aiming at the above problem, the invention provides a time synchronization method. The time synchronization method comprises that 1. a main thread creates the signal generation thread and the CAN communication thread; 2. initial synchronization of the signal generation thread and the CAN communication thread is carried out; 3. the CAN communication thread carries out data sampling through a time warping method; and 4. the main thread compares data of the signal generation thread with data of the CAN communication thread, and the detection result is obtained.
Description
Technical field
The invention belongs to vehicle electric field, particularly relate to a kind of method of battery assembly off-line test platform multithreading time synchronized.
Background technology
In the enhancing realized energy saving standard along with the whole world, the development trend of pure electric automobile is increasing.Battery assembly is the critical component of pure electric automobile, needs to carry out Real-Time Monitoring to it.The whether realistic requirement of function for battery assembly, must carry out off-line test to it, thus the defect of Timeliness coverage battery assembly, have an accident when avoiding car load to run.At present, battery assembly off-line test platform adopts hardware in loop pattern to detect battery assembly various functions, namely detection platform produces validation signal by hardware and is supplied to battery assembly, simultaneously by the data that CAN communication reading battery assembly gathers, after contrast input/output data, judge that whether battery assembly various functions is up to standard.And in battery assembly off-line test platform development process, it is very difficult that signal generation thread and CAN communication thread realize synchronous operation, easily shine into Data Comparison mistake, test result is defective; Therefore, it is significant that the effective multithreading method for synchronizing time of proposition one solves this difficult point.
Also the associated description to multithreading method for synchronizing time was once had in existing patent, as name is called a kind of patent (patent No. ZL201310452463.7) of the multi-Channels Data Acquisition based on time synchronized, this patent provides a kind of multi-Channels Data Acquisition based on time synchronized, carry out the multi-Channels Data Acquisition after time adjustment by VCO conditioning module and carry out data acquisition, and by parallel data transmission between FPGA and processor, the data gathered by sensor are preserved in memory, carry out follow-up data process by the data reading pin-saving chip or carry out data interaction by network interface and host computer, carry out host computer data processing.Name is called the patent (patent No. ZL200920085598.3) of all-hardware time synchronizer, this patent proposes a system be made up of the multiple data collectors distributed, need configuration one accept reference clock source conversion outputting standard pair time signal time synchronism apparatus, for the clock of device each in system is consistent; This patent adopts decoding and the coding of hardware implementing time signal, the fine compensation of the selection of reference source and switching and time delay; Hardware comprises motherboard, power insert, optical fiber plug-in unit, major clock plug-in unit, punctual plug-in unit and at least one expansion output inserter; Each plug-in unit is connected with motherboard, carries out signal transmission and power supply supply by motherboard.Name is called pole line fast fault locating method based on time synchronized and device (patent No. ZL201110438732.5), this patent is by being arranged on the some distributed data acquisition unit on power frame ceases to be busy, Time synchronization technique is adopted to gather the voltage of power frame ceases to be busy and the current signal of each branch, pass main website back with the data of time tag carry out computing by gathering, judge out of order branch, the display positional information of fault section and the malfunction of circuit, its device is by distributed data acquisition unit, time reference unit, communication system, main station system forms, this device utilizes the method can the fault section of automatic decision supply line, and provide the positional information of fault section, in particular improve the accuracy rate that singlephase earth fault judges, the Little Current Ground Connection System of transformer station can be substituted, power failure range can be reduced, shorten circuit emergency repair time, improve the power supply reliability of electric power system.
Compared with above-mentioned patent, realized the time synchronized of multithreading by development time synchronous device in above-mentioned patent, and traditional time synchronism apparatus adopts microprocessor to realize the coding of the decoding of clock source signals, the selection of reference source and output signal, exist and be easily disturbed, time delay is difficult to the shortcomings such as accurate compensation.Adopt development time synchronous device in above-mentioned patent simultaneously, increase the complexity of system, also improve cost of manufacture, shine into the wasting of resources.Battery assembly off-line test platform described in this patent utilizes PC system time to carry out the time synchronized of multithreading, has higher reliability and stability.
Summary of the invention
The present invention is a kind of method of battery assembly off-line test platform multithreading time synchronized, by aliging with PC system time, make the multiple thread of battery assembly off-line test platform realize synchronous operation, thus reach off-line test platform and accurately battery assembly various functions is detected.
The present invention proposes a kind of method of battery assembly off-line test platform multithreading time synchronized, this multithreading time synchronized is a kind of control strategy in battery assembly off-line test platform, main realization generates the synchronous operation of thread and CAN communication thread, so that main thread carries out Data Comparison to signal; It comprises the following steps: main thread creates signal and generates thread and CAN communication thread; Signal generates thread and CAN communication thread carries out initial synchronisation; CAN communication thread carries out data sampling by a kind of time warping method; Finally, main thread generates thread-data to signal and CAN communication thread-data contrasts, and reaches a conclusion.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the method for a kind of battery assembly off-line test platform multithreading time synchronized that the present invention proposes.
Fig. 2 is the synchronous schematic diagram of multithreading initial launch in the present invention.
Fig. 3 is CAN time warping data sampling method schematic diagram in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the square ratio juris of a kind of battery assembly off-line test platform multithreading time synchronized of the present invention's proposition is: first main thread creates signal and generates thread and CAN communication thread; Signal generation thread and CAN communication thread carry out initial synchronisation afterwards; Again, CAN communication thread carries out data sampling by a kind of time warping method; Finally, main thread generates thread-data to signal and CAN communication thread-data contrasts, and reaches a conclusion.Concrete steps are as follows:
1. main thread creates signal and generates thread and CAN communication thread; Signal generates thread for providing the physical signalling detected needed for each function of battery assembly; CAN communication thread with the data (as voltage, electric current, temperature etc.) receiving signal that battery assembly gathers and generate thread.
2. signal generation thread and CAN communication thread carry out initial synchronisation; Synchronous method is the system time that two threads wait for next second of PC simultaneously, and when next second system time arrives, then bring into operation each operating mode respectively, realizes initial synchronisation.
3.CAN communication thread carries out data sampling by a kind of time warping method; The method of sampling is the data variation operating mode generating thread according to signal, utilizes time warping method, collects intermediate point, and avoids the data variation critical point that signal generates operating mode.
4. main thread contrasts signal generation thread-data and CAN communication thread-data, and by the change of the every data of man-machine interactive platform interface real-time display system and the result of battery system, and record and preserve test data, obtain the test result of battery assembly various functions.
Accompanying drawing 2 is that multithreading initial launch is synchronous; After main thread creates signal generation thread and CAN communication thread, signal generates between thread and CAN communication thread exists a mistiming Δ T, synchronous in order to allow two threads realize initial launch, this patent adopts two threads next second time of waiting system simultaneously, align with PC system time, it is T1 that signal generates thread latency, and CAN communication thread latency is there is relational expression between T2, T1 and T2 | T1-T2|=Δ T; When system next second system time arrives, then bring into operation each operating mode respectively, realizes initial synchronisation.
Accompanying drawing 3 is CAN time warping data sampling method; It is a setting operating condition that signal generates operating mode, within T1, T2, T3, T4 each time period, is respectively unlike signal value and exports; Shine into Data Comparison for avoiding CAN communication floor data sampled acquisition to the critical point that signal value changes to make mistakes, this patent adopts when the time arrives T1/2, T2/2, T3/2, T4/2 each point, carry out data sampling and store, collect intermediate point, and avoid the data variation critical point that signal generates operating mode.
Claims (5)
1. the method for a battery assembly off-line test platform multithreading time synchronized, this multithreading time synchronized is a kind of control strategy in battery assembly off-line test platform, main realization generates the synchronous operation of thread and CAN communication thread, so that main thread carries out Data Comparison to signal; It comprises the following steps: first, and main thread creates signal and generates thread and CAN communication thread; Secondly, signal generation thread and CAN communication thread carry out initial synchronisation; Again, CAN communication thread carries out data sampling by a kind of time warping method; Finally, main thread generates thread-data to signal and CAN communication thread-data contrasts, and reaches a conclusion.
2. the method for a kind of battery assembly off-line test platform multithreading time synchronized according to claim 1, is characterized in that: main thread creates signal and generates thread and CAN communication thread; Signal generates thread for providing the physical signalling detected needed for each function of battery assembly; CAN communication thread with the data (as voltage, electric current, temperature etc.) receiving signal that battery assembly gathers and generate thread.
3. the method for a kind of battery assembly off-line test platform multithreading time synchronized according to claim 1, is characterized in that: signal generates thread and CAN communication thread carries out initial synchronisation; Synchronous method is the system time that two threads wait for next second of PC simultaneously, and when next second system time arrives, then bring into operation each operating mode respectively, realizes initial synchronisation.
4. the method for a kind of battery assembly off-line test platform multithreading time synchronized according to claim 1, is characterized in that: CAN communication thread carries out data sampling by a kind of time warping method; The method of sampling is the data variation operating mode generating thread according to signal, utilizes time warping method, collects intermediate point, and avoids the data variation critical point that signal generates operating mode.
5. the method for a kind of battery assembly off-line test platform multithreading time synchronized according to claim 1, is characterized in that; Main thread generates thread-data to signal and CAN communication thread-data contrasts, and pass through the change of the every data of interface real-time display system and the result of battery system of man-machine interactive platform, and record and preserve test data, obtain the test result of battery assembly various functions.
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Cited By (1)
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| CN109842575A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of big tolerance sample circuit of 429 bus receiving nodes |
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| US8412974B2 (en) * | 2009-11-13 | 2013-04-02 | International Business Machines Corporation | Global synchronization of parallel processors using clock pulse width modulation |
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| CN201616004U (en) * | 2009-05-11 | 2010-10-27 | 武汉国电武仪电力自动化设备有限公司 | All-hardware time synchronizer |
| US8412974B2 (en) * | 2009-11-13 | 2013-04-02 | International Business Machines Corporation | Global synchronization of parallel processors using clock pulse width modulation |
| CN101846728A (en) * | 2010-05-31 | 2010-09-29 | 重庆长安汽车股份有限公司 | Incoming inspection device of power battery for hybrid electric vehicle and inspection method |
| CN102590700A (en) * | 2011-12-23 | 2012-07-18 | 山东电力集团公司淄博供电公司 | Method and device for quickly locating faults of overhead line on basis of time synchronization |
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| CN109842575A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of big tolerance sample circuit of 429 bus receiving nodes |
| CN109842575B (en) * | 2017-11-27 | 2021-08-03 | 中国航空工业集团公司西安航空计算技术研究所 | 429 bus receiving node large-tolerance sampling circuit |
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Effective date of registration: 20220507 Address after: 101100 building 24, yard 2, huanke Middle Road, Jinqiao Science and technology industrial base, Zhongguancun Science and Technology Park, Tongzhou District, Beijing Patentee after: Rosedale automotive trim design (Beijing) Co.,Ltd. Patentee after: Rosedale intelligent automobile (Chongqing) Co.,Ltd. Address before: Chongqing University of Posts and telecommunications, Chongwen Road, Nan'an District, Chongqing 400065 Patentee before: CHONGQING University OF POSTS AND TELECOMMUNICATIONS |
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Correction item: Patentee|Address|Patentee Correct: Chongqing University of Posts and Telecommunications|Chongqing University of Posts and telecommunications, Chongwen Road, Nan'an District, Chongqing 400065 False: Rosedale automotive trim design (Beijing) Co.,Ltd.|101100 building 24, yard 2, huanke Middle Road, Jinqiao Science and technology industrial base, Zhongguancun Science and Technology Park, Tongzhou District, Beijing|Rosedale intelligent automobile (Chongqing) Co.,Ltd. Number: 20-01 Volume: 38 |
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Effective date of registration: 20220530 Address after: 101100 building 24, yard 2, huanke Middle Road, Jinqiao Science and technology industrial base, Zhongguancun Science and Technology Park, Tongzhou District, Beijing Patentee after: Rosedale automotive trim design (Beijing) Co.,Ltd. Address before: Chongqing University of Posts and telecommunications, Chongwen Road, Nan'an District, Chongqing 400065 Patentee before: CHONGQING University OF POSTS AND TELECOMMUNICATIONS Effective date of registration: 20220530 Address after: 401121 No. 22, Jinyu Avenue, Liangjiang New Area, Yubei District, Chongqing (floor 3, building 9, Jintai Intelligent Industrial Park) Patentee after: Rosedale intelligent automobile (Chongqing) Co.,Ltd. Address before: 101100 building 24, yard 2, huanke Middle Road, Jinqiao Science and technology industrial base, Zhongguancun Science and Technology Park, Tongzhou District, Beijing Patentee before: Rosedale automotive trim design (Beijing) Co.,Ltd. |
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