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CN114487127A - Time synchronization method based on acoustic emission system and test system - Google Patents

Time synchronization method based on acoustic emission system and test system Download PDF

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CN114487127A
CN114487127A CN202111667023.4A CN202111667023A CN114487127A CN 114487127 A CN114487127 A CN 114487127A CN 202111667023 A CN202111667023 A CN 202111667023A CN 114487127 A CN114487127 A CN 114487127A
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working condition
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王倩
杨宇
祁小凤
康卫平
赵罡
杨海龙
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AVIC Aircraft Strength Research Institute
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    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

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Abstract

The application belongs to the technical field of aviation strength tests, and particularly relates to a time synchronization method based on an acoustic emission system and a test system, which comprises the following steps: in an acoustic emission system, determining the time of the first working condition and the time of the last working condition on the day; in a strain acquisition system, finding the time of the first working condition and the time of the last working condition on the day; and calculating the accurate time of each working condition in the acoustic emission system according to the corresponding relation between the first step and the second step. According to the time synchronization method based on the acoustic emission system and the test system, the current situation that the acoustic emission system time and the test system time cannot be synchronized in the full-aircraft fatigue test of the airplane is broken through, the time corresponding relation between the acoustic emission data and the loading working condition is established, the acoustic emission data and the test loading working condition are in one-to-one correspondence, and therefore the reliability of the damage identification method based on the acoustic emission system and the positioning accuracy of the damage occurrence time period are greatly improved.

Description

一种基于声发射系统与试验系统的时间同步方法A Time Synchronization Method Based on Acoustic Emission System and Test System

技术领域technical field

本申请属于航空强度试验技术领域，具体涉及一种基于声发射系统与试验系统的时间同步方法。The application belongs to the technical field of aviation strength testing, and in particular relates to a time synchronization method based on an acoustic emission system and a testing system.

背景技术Background technique

飞机全机疲劳试验中，由于声发射系统与试验系统无法同步(应变采集系统与试验系统同步)，无法建立起声发射数据与加载工况的时间对应关系，因此难以解决声发射数据与加载工况精确对应的问题，无法准确定位声发射系统中记录的损伤发生在试验系统中的哪个时段。In the whole aircraft fatigue test, because the acoustic emission system and the test system cannot be synchronized (the strain acquisition system and the test system are synchronized), the time correspondence between the acoustic emission data and the loading conditions cannot be established, so it is difficult to solve the problem between the acoustic emission data and the loading conditions. Due to the problem of accurate correspondence to the situation, it is impossible to accurately locate the time period in which the damage recorded in the acoustic emission system occurred in the test system.

发明内容SUMMARY OF THE INVENTION

为了解决现有技术中存在的至少一个技术问题，本申请提供了一种基于声发射系统与试验系统的时间同步方法。In order to solve at least one technical problem existing in the prior art, the present application provides a time synchronization method based on an acoustic emission system and a test system.

本申请公开了一种基于声发射系统与试验系统的时间同步方法，包括如下步骤：The application discloses a time synchronization method based on an acoustic emission system and a test system, comprising the following steps:

步骤一、在声发射系统中，确定当日首个工况的时间及最后一个工况的时间；Step 1. In the acoustic emission system, determine the time of the first working condition and the time of the last working condition of the day;

步骤二、在应变采集系统中，找到当日首个工况的时间及最后一个工况的时间；Step 2. In the strain acquisition system, find the time of the first working condition and the time of the last working condition of the day;

步骤三、根据步骤一和步骤二的对应关系，计算每一个工况在声发射系统中的准确时间。Step 3: Calculate the exact time of each working condition in the acoustic emission system according to the corresponding relationship between Step 1 and Step 2.

根据本申请的至少一个实施方式，所述步骤一具体包括如下分步骤：According to at least one embodiment of the present application, the step 1 specifically includes the following sub-steps:

步骤1.1、在所述声发射系统中，根据声发射数据中记录的载荷谱与时间波形信息，确定当日的首个起落和最后一个起落；Step 1.1, in the acoustic emission system, according to the load spectrum and time waveform information recorded in the acoustic emission data, determine the first and last rise and fall of the day;

步骤1.2、从首个起落中确定首个工况的时间；Step 1.2. Determine the time of the first working condition from the first take-off and landing;

步骤1.3、从最后一个起落中确定最后一个工况的时间。Step 1.3. Determine the time of the last working condition from the last rise and fall.

根据本申请的至少一个实施方式，所述步骤二具体包括如下分步骤：According to at least one embodiment of the present application, the step 2 specifically includes the following sub-steps:

步骤2.1、在应变采集系统中，根据应变采集数据找到当日的首个起落和最后一个起落；Step 2.1. In the strain collection system, find the first rise and fall and the last rise and fall of the day according to the strain collection data;

步骤2.2、从首个起落中找到首个工况的时间；Step 2.2. Find the time of the first working condition from the first rise and fall;

步骤2.3、从最后一个起落中找到最后一个工况的时间。Step 2.3. Find the time of the last working condition from the last rise and fall.

根据本申请的至少一个实施方式，在所述步骤三中，是根据如下公式(1)确定步骤一和步骤二的对应关系：According to at least one embodiment of the present application, in the step 3, the corresponding relationship between the step 1 and the step 2 is determined according to the following formula (1):

Figure BDA0003451402280000021
Figure BDA0003451402280000021

其中，t是声发射系统中某一个工况的时间，即每一个工况在声发射系统中的准确时间；t1和t2分别是声发射系统中当日首个工况的时间和最后一个工况的时间；t1′和t2′分别是应变采集系统中当日首个工况的时间和最后一个工况的时间；t′是应变采集系统中，应变采集数据里某一个工况的时间。Among them, t is the time of a certain working condition in the acoustic emission system, that is, the exact time of each working condition in the acoustic emission system; t 1 and t 2 are the time of the first working condition and the last working condition of the day in the acoustic emission system, respectively. time of the working condition; t 1 ′ and t 2 ′ are the time of the first working condition and the time of the last working condition of the day in the strain acquisition system respectively; t′ is the time of a certain working condition in the strain acquisition data in the strain acquisition system time.

本申请至少存在以下有益技术效果：This application has at least the following beneficial technical effects:

本申请的基于声发射系统与试验系统的时间同步方法，突破了飞机全机疲劳试验中声发射系统时间与试验系统时间无法同步的现状，建立了声发射数据与加载工况的时间对应关系，实现了声发射数据与试验加载工况的一一对应，从而大幅提高了基于声发射系统的损伤识别方法的可靠性及损伤发生时间段的定位准确性。The time synchronization method based on the acoustic emission system and the test system of the present application breaks through the current situation that the time of the acoustic emission system cannot be synchronized with the time of the test system in the fatigue test of the whole aircraft, and establishes the time correspondence between the acoustic emission data and the loading conditions. The one-to-one correspondence between the acoustic emission data and the test loading conditions is realized, thereby greatly improving the reliability of the damage identification method based on the acoustic emission system and the positioning accuracy of the damage occurrence time period.

附图说明Description of drawings

图1是本申请的基于声发射系统与试验系统的时间同步方法的流程图；Fig. 1 is the flow chart of the time synchronization method based on acoustic emission system of the present application and test system;

图2是图1中步骤一的具体分步骤；Fig. 2 is the concrete sub-step of step 1 in Fig. 1;

图3是图1中步骤二的具体分步骤；Fig. 3 is the concrete sub-step of step 2 in Fig. 1;

图4是图2和图3中用到的数据表格图(图中的时间以时间戳的形式出现)。Figure 4 is a table diagram of the data used in Figures 2 and 3 (times in the figures appear in the form of timestamps).

具体实施方式Detailed ways

为使本申请实施的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行更加详细的描述。所描述的实施例是本申请一部分实施例，而不是全部的实施例。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。In order to make the implementation purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

下面结合附图1-图4对本申请的基于声发射系统与试验系统的时间同步方法做进一步详细说明。The time synchronization method based on the acoustic emission system and the test system of the present application will be further described in detail below with reference to accompanying drawings 1 to 4 .

本申请公开了一种基于声发射系统与试验系统的时间同步方法，包括如下步骤：The application discloses a time synchronization method based on an acoustic emission system and a test system, comprising the following steps:

步骤一、在声发射系统中，确定当日首个工况的时间及最后一个工况的时间。Step 1. In the acoustic emission system, determine the time of the first working condition and the time of the last working condition of the day.

具体的，本实施例中，如图2所示，该步骤一具体包括如下分步骤：Specifically, in this embodiment, as shown in FIG. 2 , the first step specifically includes the following sub-steps:

步骤1.1、在声发射系统中，根据声发射数据中记录的载荷谱与时间波形信息，确定当日的首个起落和最后一个起落，即图4中的A列第2行和A列第17行；Step 1.1. In the acoustic emission system, according to the load spectrum and time waveform information recorded in the acoustic emission data, determine the first rise and fall of the day and the last rise and fall, that is, the 2nd row of the A column and the 17th row of the A column in Figure 4 ;

步骤1.2、从首个起落中确定首个工况的时间，即图4中的C列第2行；Step 1.2. Determine the time of the first working condition from the first rise and fall, that is, the second row of column C in Figure 4;

步骤1.3、从最后一个起落中确定最后一个工况的时间，即图4中的C列第17行。Step 1.3. Determine the time of the last working condition from the last rise and fall, that is, the 17th row of column C in Figure 4.

步骤二、在应变采集系统中，找到当日首个工况的时间及最后一个工况的时间。Step 2: In the strain acquisition system, find the time of the first working condition and the time of the last working condition of the day.

同样的，在本实施例中，如图3所示，该步骤二具体包括如下分步骤：Similarly, in this embodiment, as shown in FIG. 3 , the second step specifically includes the following sub-steps:

步骤2.1、在应变采集系统中，根据应变采集数据找到当日的首个起落和最后一个起落，即图4中的A列第2行和A列第17行；Step 2.1. In the strain acquisition system, find the first rise and fall and the last rise and fall of the day according to the strain collection data, that is, the 2nd row of the A column and the 17th row of the A column in Figure 4;

步骤2.2、从首个起落中找到首个工况的时间，即图4中的D列第2行；Step 2.2. Find the time of the first working condition from the first rise and fall, that is, the second row of the D column in Figure 4;

步骤2.3、从最后一个起落中找到最后一个工况的时间；即图4中的D列第17行；Step 2.3. Find the time of the last working condition from the last rise and fall; that is, the 17th row of column D in Figure 4;

需要说明的是，应变采集系统时间是一个excel表格数据，在试验过程中自动记录的，因此当根据声发射系统确定了开头和结尾时间后(即步骤2.2和2.3确定的时间)，当日其他工况的时间就自动出来了，即图4中的D列第3行到第16行。It should be noted that the time of the strain acquisition system is an excel table data, which is automatically recorded during the test. Therefore, when the start and end times are determined according to the acoustic emission system (that is, the time determined in steps 2.2 and 2.3), other work on the day The time will come out automatically, that is, the 3rd row to the 16th row of the D column in Figure 4.

步骤三、根据步骤一和步骤二的对应关系，计算每一个工况在声发射系统中的准确时间。Step 3: Calculate the exact time of each working condition in the acoustic emission system according to the corresponding relationship between Step 1 and Step 2.

具体的，在本实施例中，是根据如下公式(1)确定步骤一和步骤二的对应关系：Specifically, in this embodiment, the corresponding relationship between step 1 and step 2 is determined according to the following formula (1):

Figure BDA0003451402280000041
Figure BDA0003451402280000041

其中，t是声发射系统中某一个工况的时间，即每一个工况在声发射系统中的准确时间；t1和t2分别是声发射系统中当日首个工况的时间和最后一个工况的时间；t1′和t2′分别是应变采集系统中当日首个工况的时间和最后一个工况的时间；t′是应变采集系统中，应变采集数据里某一个工况的时间。Among them, t is the time of a certain working condition in the acoustic emission system, that is, the exact time of each working condition in the acoustic emission system; t 1 and t 2 are the time of the first working condition and the last working condition of the day in the acoustic emission system, respectively. time of working condition; t 1 ′ and t 2 ′ are the time of the first working condition and the time of the last working condition of the day in the strain acquisition system respectively; t′ is the time of a certain working condition in the strain acquisition data in the strain acquisition system time.

综上，本申请的基于声发射系统与试验系统的时间同步方法，突破了飞机全机疲劳试验中声发射系统时间与试验系统时间无法同步的现状，建立了声发射数据与加载工况的时间对应关系，实现了声发射数据与试验加载工况的一一对应，从而大幅提高了基于声发射系统的损伤识别方法的可靠性及损伤发生时间段的定位准确性。In summary, the time synchronization method based on the acoustic emission system and the test system of the present application breaks through the current situation that the time of the acoustic emission system and the test system cannot be synchronized in the aircraft fatigue test, and establishes the time between the acoustic emission data and the loading conditions. The corresponding relationship realizes the one-to-one correspondence between the acoustic emission data and the test loading conditions, thereby greatly improving the reliability of the damage identification method based on the acoustic emission system and the positioning accuracy of the damage occurrence time period.

以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (4)

1. A time synchronization method based on an acoustic emission system and a test system is characterized by comprising the following steps:
firstly, determining the time of the first working condition and the time of the last working condition in the current day in an acoustic emission system;
step two, finding the time of the first working condition and the time of the last working condition in the current day in a strain acquisition system;
and step three, calculating the accurate time of each working condition in the acoustic emission system according to the corresponding relation of the step one and the step two.
2. The method for time synchronization of an acoustic emission system with a test system according to claim 1, wherein said step one comprises the sub-steps of:
step 1.1, in the acoustic emission system, determining the first rise and fall and the last rise and fall of the current day according to load spectrum and time waveform information recorded in acoustic emission data;
step 1.2, determining the time of the first working condition from the first rise and fall;
and 1.3, determining the time of the last working condition from the last rise and fall.
3. The method for time synchronization between an acoustic emission system and a test system as set forth in claim 2, wherein said step two comprises the sub-steps of:
step 2.1, finding the first rise and fall and the last rise and fall of the current day according to the strain acquisition data in the strain acquisition system;
2.2, finding the time of the first working condition from the first rise and fall;
and 2.3, finding the time of the last working condition from the last rise and fall.
4. The method for time synchronization of an acoustic emission system with a test system as set forth in claim 3, wherein in said third step, the correspondence between the first step and the second step is determined according to the following formula (1):
Figure FDA0003451402270000011
wherein t is the time of a certain working condition in the acoustic emission system, namely the accurate time of each working condition in the acoustic emission system; t is t1And t2Respectively the time of the first working condition and the time of the last working condition in the current day in the acoustic emission system; t is t1' and t2' the time of the first working condition and the time of the last working condition in the current day in the strain acquisition system are respectively; t' is the time of a certain working condition in the strain acquisition data in the strain acquisition system.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120209538A1 (en) * 2011-02-10 2012-08-16 Caicedo Juan M Determination of the Remaining Life of a Structural System Based on Acoustic Emission Signals
CN106059697A (en) * 2015-04-14 2016-10-26 Ls产电株式会社 Method for time synchronization
CN108037185A (en) * 2017-11-25 2018-05-15 中国科学院金属研究所 A kind of silicon carbide fibre enhancing titanium matrix composite fibrous fracture detection method based on acoustic emission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120209538A1 (en) * 2011-02-10 2012-08-16 Caicedo Juan M Determination of the Remaining Life of a Structural System Based on Acoustic Emission Signals
CN106059697A (en) * 2015-04-14 2016-10-26 Ls产电株式会社 Method for time synchronization
CN108037185A (en) * 2017-11-25 2018-05-15 中国科学院金属研究所 A kind of silicon carbide fibre enhancing titanium matrix composite fibrous fracture detection method based on acoustic emission

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
王丙阳;耿荣生;邬冠华;: "声发射技术在飞机主起落架疲劳试验中的应用", 无损检测, no. 04, 10 April 2011 (2011-04-10), pages 23 - 25 *
王仲涛;王纪兵;: "SINS/GPS数据融合中的时间校准方法研究", 航空兵器, no. 05, 15 October 2008 (2008-10-15), pages 16 - 17 *
胡威;张晨洁;邢力丹;: "小厂坝矿区地应力测试及分布规律", 矿业工程, no. 02, 15 May 2020 (2020-05-15), pages 16 *

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