CN104881329A - Battery assembly offline detection platform multithreading time synchronization method - Google Patents
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Abstract
本发明为一种电池总成下线检测平台多线程时间同步的方法。电池总成下线检测平台通过硬件产生验证信号提供给电池总成，同时通过CAN通信读取电池总成所采集的数据，对比输出/输入数据后判断电池总成各项功能是否达标。而电池总成下线检测平台的信号生成线程与CAN通信线程实现同步运行非常困难，容易造成数据对比错误，检测结论不合格；针对以上问题，本发明提出一种时间同步方法；该方法为：1.主线程创建信号生成线程与CAN通信线程；2.信号生成线程与CAN通信线程进行初始同步；3.CAN通信线程通过一种时间错位方法进行数据采样；4.主线程对信号生成线程数据与CAN通信线程数据进行对比，得出检测结论。
The invention relates to a method for multi-thread time synchronization of a battery assembly off-line detection platform. The battery assembly off-line detection platform generates a verification signal through hardware and provides it to the battery assembly. At the same time, it reads the data collected by the battery assembly through CAN communication, and compares the output/input data to determine whether the various functions of the battery assembly meet the standards. However, it is very difficult for the signal generation thread and the CAN communication thread of the battery assembly offline detection platform to realize synchronous operation, which may easily cause data comparison errors and unqualified detection conclusions; in view of the above problems, the present invention proposes a time synchronization method; the method is: 1. The main thread creates the signal generation thread and the CAN communication thread; 2. The signal generation thread and the CAN communication thread perform initial synchronization; 3. The CAN communication thread samples data through a time dislocation method; 4. The main thread generates the thread data for the signal Compared with the CAN communication thread data, the detection conclusion is drawn.
Description
技术领域technical field
本发明属于汽车电子领域，尤其涉及一种电池总成下线检测平台多线程时间同步的方法。The invention belongs to the field of automotive electronics, in particular to a multi-thread time synchronization method for a battery assembly off-line detection platform.
背景技术Background technique
在随着全球对节能和环保意识的增强，纯电动汽车的发展趋势越来越大。电池总成是纯电动汽车的关键部件，需要对其进行实时监测。针对电池总成的功能是否符合实际要求，必须对其进行下线检测，从而及时发现电池总成的缺陷，避免整车运行时发生事故。目前，电池总成下线检测平台采用硬件在环模式对电池总成各项功能进行检测，即检测平台通过硬件产生验证信号提供给电池总成，同时通过CAN通信读取电池总成所采集的数据，对比输出/输入数据后判断电池总成各项功能是否达标。而在电池总成下线检测平台开发过程中，信号生成线程与CAN通信线程实现同步运行非常困难，容易照成数据对比错误，检测结论不合格；因此，提出一种有效的多线程时间同步方法来解决这一难点具有重要意义。With the increasing awareness of energy saving and environmental protection in the world, the development trend of pure electric vehicles is getting bigger and bigger. The battery assembly is a key component of a pure electric vehicle and needs to be monitored in real time. Whether the function of the battery assembly meets the actual requirements, it must be tested offline, so as to detect the defects of the battery assembly in time and avoid accidents during the operation of the whole vehicle. At present, the battery assembly off-line detection platform adopts hardware-in-the-loop mode to detect various functions of the battery assembly, that is, the detection platform generates verification signals through hardware and provides them to the battery assembly, and at the same time reads the data collected by the battery assembly through CAN communication. Data, compare the output/input data to judge whether the functions of the battery assembly are up to standard. In the development process of the battery assembly off-line detection platform, it is very difficult to realize the synchronous operation of the signal generation thread and the CAN communication thread, which is easy to cause data comparison errors and unqualified detection conclusions; therefore, an effective multi-thread time synchronization method is proposed It is important to solve this difficulty.
在已有专利中也曾有对多线程时间同步方法的相关描述，如名称为一种基于时间同步的多通道数据采集仪的专利(专利号ZL201310452463.7)，该专利提供一种基于时间同步的多通道数据采集仪，通过VCO调理模块进行时间校正后的多通道数据采集仪进行数据采集，并通过FPGA与处理器之间并行数据传输，将传感器采集的数据保存在存储器中，通过读取数据存储芯片的数据进行后续数据处理或者通过网口与上位机进行数据交互，进行上位机数据处理。名称为全硬件时间同步装置的专利(专利号ZL200920085598.3)，该专利提出一个由分布的多个数据采集装置组成的系统，需要配置一个接受基准时钟源转换输出标准对时信号的时间同步装置，用于将系统内各装置的时钟保持一致；该专利采用硬件实现时间信号的解码和编码，基准源的选择和切换以及延时的精确补偿；硬件包括母板、电源插件、光纤插件、主时钟插件、守时插件和至少一个扩展输出插件；各插件与母板相连，通过母板进行信号传递和电源供给。名称为基于时间同步的架空线快速故障定位方法及装置(专利号ZL201110438732.5)，该专利通过设置在配电架空线上的若干分布式数据采集单元，采用时间同步技术采集配电架空线的电压和各分支的电流信号，将采集带有时间标签的数据传回主站进行运算，判断出故障的分支，显示故障区间的位置信息和线路的故障状态，其装置由分布式的数据采集单元、时间基准单元、通讯系统、主站系统组成，本装置利用该方法可以自动判断供电线路的故障区段，并给出故障区间的位置信息，特别是提高了单相接地故障判断的准确率，可以替代变电站的小电流接地选线系统，能减小停电范围、缩短线路抢修时间，提高供电系统的供电可靠性。There have also been related descriptions of multi-thread time synchronization methods in existing patents, such as a patent named a multi-channel data acquisition instrument based on time synchronization (patent No. ZL201310452463.7), which provides a time synchronization-based The multi-channel data acquisition instrument, through the VCO conditioning module for time-corrected multi-channel data acquisition instrument for data acquisition, and through the parallel data transmission between FPGA and processor, the data collected by the sensor is stored in the memory, by reading The data of the data storage chip is used for subsequent data processing or data interaction with the host computer through the network port for data processing of the host computer. The patent named full hardware time synchronization device (Patent No. ZL200920085598.3), which proposes a system composed of distributed multiple data acquisition devices, needs to be equipped with a time synchronization device that accepts the reference clock source to convert and output a standard time synchronization signal , used to keep the clocks of each device in the system consistent; this patent uses hardware to realize the decoding and encoding of time signals, the selection and switching of reference sources, and the precise compensation of delay; the hardware includes motherboards, power plugs, optical fiber plugs, main A clock plug-in, a timing plug-in and at least one extended output plug-in; each plug-in is connected with the motherboard, and the signal transmission and power supply are carried out through the motherboard. The name is Time Synchronization-Based Fast Fault Location Method and Device for Overhead Lines (Patent No. ZL201110438732.5). This patent adopts time synchronization technology to collect data of distribution overhead lines through a number of distributed data acquisition units installed on power distribution overhead lines. The voltage and current signals of each branch will collect the data with time tags and send them back to the main station for calculation, judge the fault branch, display the location information of the fault area and the fault state of the line, and its device is composed of a distributed data acquisition unit , a time reference unit, a communication system, and a master station system. Using this method, the device can automatically judge the fault section of the power supply line, and give the location information of the fault section, especially improving the accuracy of single-phase ground fault judgment. It can replace the small current grounding line selection system of the substation, which can reduce the scope of power failure, shorten the repair time of the line, and improve the power supply reliability of the power supply system.
与上述专利相比较，上述专利中通过开发时间同步装置来实现多线程的时间同步，而传统的时间同步装置采用微处理器实现时钟源信号的解码、基准源的选择和输出信号的编码，存在易受干扰，延时难以准确补偿等缺点。同时上述专利中采用开发时间同步装置，加大了系统的复杂度，也提高了制作成本，照成资源浪费。本专利中所述的电池总成下线检测平台利用PC机系统时间进行多线程的时间同步，具有较高的可靠性和稳定性。Compared with the above-mentioned patents, in the above-mentioned patents, multi-threaded time synchronization is realized by developing a time synchronization device, while the traditional time synchronization device uses a microprocessor to realize the decoding of the clock source signal, the selection of the reference source and the encoding of the output signal. Susceptible to interference, delay is difficult to accurately compensate and other shortcomings. Simultaneously, the development time synchronization device is adopted in the above-mentioned patents, which increases the complexity of the system, increases the production cost, and wastes resources. The battery assembly off-line detection platform described in this patent uses the PC system time to perform multi-thread time synchronization, which has high reliability and stability.
发明内容Contents of the invention
本发明为一种电池总成下线检测平台多线程时间同步的方法，通过与PC机系统时间对齐，使电池总成下线检测平台多个线程实现同步运行，从而达到下线检测平台准确无误的对电池总成各项功能进行检测。The invention is a multi-thread time synchronization method for a battery assembly off-line detection platform. By aligning with the PC system time, multiple threads of the battery assembly off-line detection platform can realize synchronous operation, so that the off-line detection platform is accurate and correct The various functions of the battery assembly are tested.
本发明提出一种电池总成下线检测平台多线程时间同步的方法，该多线程时间同步为电池总成下线检测平台中的一种控制策略，主要实现对信号生成线程与CAN通信线程的同步运行，以便主线程进行数据对比；其包括以下步骤：主线程创建信号生成线程与CAN通信线程；信号生成线程与CAN通信线程进行初始同步；CAN通信线程通过一种时间错位方法进行数据采样；最后，主线程对信号生成线程数据与CAN通信线程数据进行对比，得出结论。The present invention proposes a method for multi-thread time synchronization of the battery assembly off-line detection platform. The multi-thread time synchronization is a control strategy in the battery assembly off-line detection platform, which mainly realizes the synchronization between the signal generation thread and the CAN communication thread. Run synchronously so that the main thread can compare data; it includes the following steps: the main thread creates a signal generation thread and a CAN communication thread; the signal generation thread and the CAN communication thread perform initial synchronization; the CAN communication thread performs data sampling through a time dislocation method; Finally, the main thread compares the signal generation thread data with the CAN communication thread data and draws a conclusion.
附图说明Description of drawings
图1为本发明提出的一种电池总成下线检测平台多线程时间同步的方法的原理图。FIG. 1 is a schematic diagram of a multi-threaded time synchronization method for a battery assembly off-line detection platform proposed by the present invention.
图2为本发明中多线程初始运行同步示意图。Fig. 2 is a schematic diagram of the synchronization of multi-thread initial operation in the present invention.
图3为本发明中CAN通信模块时间错位数据采样方法示意图。Fig. 3 is a schematic diagram of the CAN communication module time misalignment data sampling method in the present invention.
具体实施方式Detailed ways
以下结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
如附图1所示，本发明提出的一种电池总成下线检测平台多线程时间同步的方法的原理是：首先主线程创建信号生成线程与CAN通信线程；之后信号生成线程与CAN通信线程进行初始同步；再次，CAN通信线程通过一种时间错位方法进行数据采样；最后，主线程对信号生成线程数据与CAN通信线程数据进行对比，得出结论。具体步骤如下：As shown in accompanying drawing 1, the principle of a method for multi-threaded time synchronization of a battery assembly off-line detection platform proposed by the present invention is: first, the main thread creates a signal generation thread and a CAN communication thread; then the signal generation thread and a CAN communication thread Perform initial synchronization; again, the CAN communication thread samples data through a time dislocation method; finally, the main thread compares the signal generation thread data with the CAN communication thread data, and draws a conclusion. Specific steps are as follows:
1.主线程创建信号生成线程与CAN通信线程；信号生成线程用于提供检测电池总成各功能所需的物理信号；CAN通信线程用与接收电池总成所采集的信号生成线程的数据(如电压、电流、温度等)。1. The main thread creates a signal generation thread and a CAN communication thread; the signal generation thread is used to provide the physical signals required to detect each function of the battery assembly; the CAN communication thread uses and receives the data of the signal generation thread collected by the battery assembly (such as voltage, current, temperature, etc.).
2.信号生成线程与CAN通信线程进行初始同步；同步方法为两线程同时等待PC机下一秒的系统时间，当下一秒系统时间到来，则分别开始运行各工况，实现初始同步。2. The signal generation thread and the CAN communication thread perform initial synchronization; the synchronization method is that the two threads wait for the next second system time of the PC at the same time, and when the next second system time arrives, they start to run each working condition respectively to realize the initial synchronization.
3.CAN通信线程通过一种时间错位方法进行数据采样；采样方法为根据信号生成线程的数据变化工况，利用时间错位方法，采集到中间点，而避开信号生成工况的数据变化临界点。3. The CAN communication thread performs data sampling through a time dislocation method; the sampling method is based on the data change working condition of the signal generation thread, and uses the time dislocation method to collect the intermediate point, while avoiding the data change critical point of the signal generation working condition .
4.主线程对信号生成线程数据与CAN通信线程数据进行对比，并通过人机交互平台界面实时显示系统各项数据的变化和电池系统的验证结果，以及记录并保存测试数据，得到电池总成各项功能的检测结论。4. The main thread compares the data of the signal generation thread with the data of the CAN communication thread, and displays the changes of various data of the system and the verification results of the battery system in real time through the interface of the human-computer interaction platform, and records and saves the test data to obtain the battery assembly The detection conclusion of each function.
附图2为多线程初始运行同步；主线程创建信号生成线程与CAN通信线程后，信号生成线程与CAN通信线程之间存在一个时间差ΔT，为了让两线程实现初始运行同步，本专利采用两线程同时等待系统下一秒时间，与PC机系统时间对齐，信号生成线程等待时间为T1，CAN通信线程等待时间为T2，T1与T2之间存在关系式|T1-T2|=ΔT；当系统下一秒系统时间到来，则分别开始运行各工况，实现初始同步。Accompanying drawing 2 is the synchronization of multi-thread initial operation; after the main thread creates the signal generation thread and the CAN communication thread, there is a time difference ΔT between the signal generation thread and the CAN communication thread. In order to allow the two threads to realize the initial operation synchronization, this patent uses two threads At the same time, wait for the next second of the system, which is aligned with the PC system time. The waiting time of the signal generation thread is T1, and the waiting time of the CAN communication thread is T2. There is a relationship between T1 and T2 |T1-T2|=ΔT; when the system is down When the one-second system time arrives, each working condition will start to run separately to achieve initial synchronization.
附图3为CAN通信模块时间错位数据采样方法；信号生成工况为一设定运行工况，在T1、T2、T3、T4各时间段内，分别为不同信号值输出；为避免CAN通信工况数据采样采集到信号值变化的临界点照成数据对比出错，本专利采用当时间到达T1/2、T2/2、T3/2、T4/2各点时，进行数据采样并存储，采集到中间点，而避开信号生成工况的数据变化临界点。Accompanying drawing 3 is CAN communication module time misalignment data sampling method; The working condition of signal generation is a set operating condition, in each time period of T1, T2, T3, T4, it is respectively different signal value output; In order to avoid CAN communication work The critical point of the signal value change is taken into account when the data is sampled and collected to make a data comparison error. This patent adopts the method of sampling and storing the data when the time reaches the points T1/2, T2/2, T3/2, and T4/2. The middle point, while avoiding the data change critical point of the signal generation condition.
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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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