WO2020007374A1 - Distributed continuous vibration monitoring system - Google Patents
Distributed continuous vibration monitoring system Download PDFInfo
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- WO2020007374A1 WO2020007374A1 PCT/CN2019/097389 CN2019097389W WO2020007374A1 WO 2020007374 A1 WO2020007374 A1 WO 2020007374A1 CN 2019097389 W CN2019097389 W CN 2019097389W WO 2020007374 A1 WO2020007374 A1 WO 2020007374A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
Definitions
- the present application belongs to the technical field of vibration monitoring, and in particular, it is a distributed vibration continuous monitoring system.
- the vibration frequency of the building has an important influence on the structural performance of the building and is an important monitoring index.
- Vibration monitoring is the monitoring work for the vibration frequency.
- the vibration data is collected.
- the synchronization of data acquisition of each sensor is very high.
- the vibration monitoring system In order to meet the requirements of synchronization, the vibration monitoring system mostly adopts a centralized system structure. As an urban landmark, the super-high-rise buildings have extremely high vertical spans and severely spaced vertical floors. The centralized system structure faces problems such as difficulty in wiring and exceeding the limit of wiring length, which is difficult to effectively implement in super high-rise buildings. If we adopt a distributed system architecture, we will face the problem of low synchronization. At present, the continuous vibration monitoring of super high-rise buildings has not been carried out sufficiently, which makes effective continuous vibration monitoring methods even more lacking.
- the present application provides a distributed continuous vibration monitoring system with an easy-to-implement distributed structure and excellent data acquisition synchronization to meet the continuous vibration monitoring of super high-rise buildings.
- a distributed vibration continuous monitoring system includes a plurality of subsystems distributed at each measurement point of a super high-rise building.
- the subsystems include:
- the terminal including a memory and a processor, is configured to issue a control instruction according to a preset sampling frequency and a preset sampling duration;
- a collection unit which is divided into each measurement point of a super high-rise building, and is configured to collect vibration data of the corresponding measurement point according to the control instruction, and output the vibration data to the terminal;
- a receiving end configured to receive a satellite second pulse signal to obtain a satellite standard time
- the memory stores a computer program, and the processor executes the computer program to eliminate a system time error in the vibration data received by the terminal according to the satellite second pulse signal.
- the acquisition unit includes an acquisition module and a sensor, and the acquisition module is configured to execute a compiled program to drive the sensor and transmit the vibration data of the corresponding measurement point to the terminal according to the control instruction.
- the sensor is configured to collect vibration data of the corresponding measurement point.
- the system time error includes a clock error, a program time difference, and a packet loss time difference
- the clock error is an error of the terminal's clock source relative to the satellite standard time
- the program time difference is The error between the running time of the compiler and the standard running time
- the packet loss time difference is a time error caused by a difference in the packet loss rate of the data transmission between the acquisition module and the terminal in each subsystem.
- the clock source is a local clock
- the second signal of the local clock is obtained by frequency division of a local crystal oscillator, a chirped clock, or a cesium clock.
- the computer program includes the following steps:
- the senor is an acceleration sensor configured to collect an acceleration signal
- "eliminating the clock error and the program time difference based on the satellite second pulse signal” includes the following steps:
- the acceleration signal after the synchronization starting point is intercepted as the vibration data of the corresponding measurement point.
- "eliminating the packet loss time difference according to the satellite second pulse signal” includes the following steps:
- determining the packet loss time difference according to the preset sampling frequency and the synchronous sampling duration includes the following steps:
- the actual synchronization end point is a rising edge start point of another satellite second pulse signal.
- the synchronous sampling duration is not greater than the preset sampling duration, and is a maximum value of an integer multiple of a period of the satellite second pulse signal.
- a plurality of subsystems are provided at each measurement point of a super high-rise building, and multiple points are collected simultaneously in a distributed structure, which avoids the wiring difficulties of centralized construction and is easy to implement;
- the satellite second pulse signal is received by the receiving end, and the processor of the terminal executes the computer program stored in the memory, and the satellite time is used to eliminate the system time error in the vibration data received by the terminal, and realize the data between the various subsystems. Acquisition synchronization.
- FIG. 2 is a schematic flowchart of a computer program of a distributed continuous vibration monitoring system according to Embodiment 2 of the present application;
- FIG. 3 is a schematic flowchart of step A of a computer program of a distributed vibration continuous monitoring system according to Embodiment 2 of the present application;
- step B of a computer program of a distributed vibration continuous monitoring system according to Embodiment 2 of the present application;
- step B1 of a computer program of a distributed vibration continuous monitoring system according to Embodiment 2 of the present application;
- FIG. 6a is a first schematic diagram of a computer program for positioning a synchronous starting point of a distributed vibration continuous monitoring system provided in Embodiment 2 of the present application;
- 6b is a second schematic diagram of a computer program for positioning a synchronous starting point of the distributed vibration continuous monitoring system provided in Embodiment 2 of the present application;
- 7a is a first-order mode shape of a super high-rise building actually monitored by the distributed vibration continuous monitoring system according to an embodiment of the present application;
- 7b is a second-order mode shape of a super high-rise building actually monitored by the distributed vibration continuous monitoring system according to an embodiment of the present application;
- 7c is a third-order mode shape of a super high-rise building actually monitored by a distributed vibration continuous monitoring system provided by an embodiment of the present application;
- FIG. 7d is a fourth-order vibration mode of a super high-rise building actually monitored by the distributed vibration continuous monitoring system according to an embodiment of the present application.
- FIG. 7e is a fifth-order mode shape of a super high-rise building actually monitored by the distributed vibration continuous monitoring system provided in the embodiment of the present application.
- 1000-distributed continuous vibration monitoring system 0100-subsystem, 0110-terminal, 0111-memory, 0112-processor, 0113-input unit, 0114-display unit, 0120- acquisition unit, 0121- acquisition module, 0122-sensor , 0130-receiving end.
- this embodiment discloses a distributed vibration continuous monitoring system 1000.
- the monitoring system includes a plurality of sub-systems 0100 distributed at each measurement point of a super high-rise building.
- the subsystem 0100 includes a terminal 0110, a collection unit 0120, and a receiving end 0130.
- Each subsystem 0100 is independently set up, and there is no need to connect with each other through a cable, and vibration data collection is performed on the measurement points at which it is located.
- the terminal 0110 includes a memory 0111 and a processor 0112, and is configured to issue a control instruction according to a preset sampling frequency and a preset sampling duration.
- the preset sampling frequency and the preset sampling time are preset by the user according to the structural characteristics of the super high-rise building to be monitored specifically.
- the processor 0112 issues a pulsed control instruction at a preset sampling frequency to trigger a collection action by the collection unit 0120 to implement continuous monitoring of structural vibration of a super high-rise building.
- the terminal 0110 includes terminal devices (such as computers and servers) that do not have mobile communication capabilities, and also includes mobile terminals (such as smart phones, tablet computers, on-board computers, and smart wearable devices).
- terminal devices such as computers and servers
- mobile terminals such as smart phones, tablet computers, on-board computers, and smart wearable devices.
- the memory 0111 may include a program storage area and a data storage area.
- the storage program area can store operating systems and applications required for at least one function (such as sound playback function and image playback function, etc.); the storage data area can store data created according to the use of the terminal 0110 (such as audio data and Backup files, etc.).
- the memory 0111 may include a high-speed random access memory, and may further include a non-volatile memory (for example, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage device).
- the terminal 0110 further includes an input unit 0113 and a display unit 0114.
- the input unit 0113 is configured to receive various instructions or parameters (including a preset scrolling method, a preset time interval, and a preset scrolling number) input by a user, including a mouse, a keyboard, a touch panel, and other input devices.
- the display unit 0114 is configured to display various output information (including a webpage page and a parameter configuration interface, etc.) of the terminal 0110, including a display panel.
- the collecting unit 0120 is divided into each measurement point of the super high-rise building, and is configured to collect vibration data of the corresponding measurement point according to the control instruction, and output the vibration data to the terminal 0110. It can be understood that the acquisition unit 0120 is an execution unit for vibration data collection, that is, to measure the vibration signal of the super high-rise building at the measurement point, convert the vibration signal into an electrical signal for transmission, and return it to the terminal 0110 for data analysis.
- the collection unit 0120 can be implemented in many ways.
- the collection unit 0120 includes a collection module 0121 and a sensor 0122.
- the acquisition module 0121 is configured to execute a compiled program according to the control instruction to drive the sensor 0122 and transmit the vibration data of the corresponding measurement point to the terminal 0110.
- the terminal 0110 corresponds to the upper computer
- the acquisition module 0121 corresponds to the lower computer.
- the compiler is configured to translate the high-level language program into binary code, thereby driving the sensor 0122 to perform a collection action.
- the acquisition module 0121 compiles the control instructions of the terminal 0110 into machine instructions to drive the sensor 0122, and on the other hand converts the vibration signals collected by the sensor 0122 into electrical signals for transmission and outputs.
- the senor 0122 is configured to collect vibration data corresponding to a measurement point according to an instruction of the compiler.
- sensors 0122 There are many types of sensors 0122, including acceleration sensors and strain gauges. Exemplarily, this embodiment uses an acceleration sensor for vibration measurement.
- the receiving end 0130 is configured to receive the satellite second pulse signal to obtain the satellite standard time, and provide the time reference of the 0100 data synchronization of each subsystem through satellite timing.
- the satellite second pulse signal is issued by a satellite positioning system.
- the satellite positioning system may be a GPS and Beidou system with a timing function.
- the receiving end 0130 is a receiver that matches the satellite positioning system.
- the memory 0111 stores a computer program
- the processor 0112 executes the computer program to eliminate a system time error in the vibration data received by the terminal 0110 according to the satellite second pulse signal, thereby ensuring data between the subsystems 0100 Acquisition synchronization.
- the system time error includes a clock error, a program time difference, and a packet loss time difference.
- the clock error is an error of the clock source of the terminal 0110 relative to the satellite standard time
- the program time difference is the runtime of the compiled program relative to the standard operation.
- the packet loss time difference is a time error caused by a difference in packet loss rate of data transmission between the acquisition module 0121 and the terminal 0110 in each subsystem 0100.
- the clock source is a local clock
- the second signal of the local clock is obtained by dividing the local crystal oscillator, rubidium clock, or cesium clock.
- the local clock has limited accuracy and has different delays, which results in different system delays between different subsystems 0100.
- the program time difference is caused by the difference in hardware characteristics of the acquisition module 0121 of each subsystem 0100.
- the computing capabilities (such as performance differences) and computing environments (such as environmental temperature and humidity) of different acquisition modules 0121 are different, which results in significant differences in the running time of the compiler in different acquisition modules 0121, resulting in Delay affects synchronization.
- this embodiment further discloses a computer program, which is stored in the memory 0111 of the terminal 0110 and configured to be executed by the processor 0112 to implement continuous monitoring. Synchronization between them to ensure monitoring accuracy.
- the computer program includes the following steps:
- A Eliminate the clock error and the program time difference according to the satellite second pulse signal. It can be understood that both the clock error and the program time difference affect the vibration data collected by the sensor 0122. Therefore, by compensating the vibration data collected by the sensor 0122 according to the satellite second pulse signal, the clock error and the program time difference can be eliminated at the same time.
- Step A includes the following steps:
- A1 the first satellite second pulse signal obtained after the control instruction is issued; it can be understood that based on the clock characteristics of each subsystem 0100, the satellite second pulses obtained by different receivers 0130 in the same period of the satellite second pulse signal The signal is the same satellite second pulse signal. In other words, after the control instruction is issued, the first satellite second pulse signal obtained by different receiving end 0130 is also the same satellite second pulse signal, thereby providing a calibrated clock reference for each subsystem 0100.
- A2 capture the starting point of the rising edge of the first satellite second pulse signal as the starting point of synchronization
- A3 Intercept the acceleration signal after the synchronization starting point as the vibration data of the corresponding measurement point.
- a i represents a signal point
- a subscript i represents a sequence number of the sampling point.
- step B includes the following steps:
- the synchronous sampling duration is not greater than the preset sampling duration, and is a maximum value of an integer multiple of a period of the satellite second pulse signal. Since the synchronization sampling time is an integer multiple of the period of the satellite second pulse signal, theoretically, after the synchronization sampling time has passed from the starting point of the synchronization, the corresponding point is still the starting point of the rising edge of the satellite second pulse signal.
- step B1 includes the following steps:
- step A1 acquiring the first satellite second pulse signal after the control instruction is issued;
- step A2 capture the starting point of the rising edge of the first satellite second pulse signal as the starting point of synchronization (for example, a i );
- the actual synchronization end point is the rising edge start point of another satellite second pulse signal.
- the starting point M of the rising edge after indexing the synchronization sampling duration T 1 in the vibration data spectrum received by the terminal 0110 is the actual synchronization end point.
- B15 Determine the packet loss time difference according to the theoretical synchronization end point, the actual synchronization end point, and the preset sampling frequency. For example, (M -M solid Li) / N loss is the difference. It should be understood that the packet loss time difference between different subsystems 0100 is not the same. Therefore, the vibration data of the corresponding subsystem 0100 needs to be compensated according to the packet loss time difference.
- the computer program provided in this embodiment effectively solves the data synchronization problem of the distributed vibration continuous monitoring system 1000, avoids the system delay of the distributed structure, and is particularly suitable for large buildings such as super high-rise buildings.
- a mode analysis can be performed to obtain the various mode shapes of super high-rise buildings, which overcomes the technical obstacles of data synchronization and realizes the vibration monitoring of super high-rise buildings that could not be achieved in the past.
- . 7a to 7e respectively show the first to fifth-order mode shapes of super-tall buildings actually monitored, and show the effectiveness of the distributed continuous vibration monitoring system 1000.
- any specific value should be construed as exemplary only and not as a limitation, so other examples of the exemplary embodiments may have different values.
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Abstract
Description
Claims (10)
- 一种分布式振动连续监测***,其特征在于,包括分设于超高层建筑的各个测量点的复数个子***,所述子***包括:A distributed vibration continuous monitoring system is characterized in that it includes a plurality of subsystems that are distributed at each measurement point of a super high-rise building. The subsystems include:终端,包括存储器与处理器,配置成根据预设采样频率与预设采样时长发出控制指令;The terminal, including a memory and a processor, is configured to issue a control instruction according to a preset sampling frequency and a preset sampling duration;采集单元,分设于超高层建筑的各个测量点,配置成根据所述控制指令采集对应测量点的振动数据,并将所述振动数据输出至所述终端;A collection unit, which is divided into each measurement point of a super high-rise building, and is configured to collect vibration data of the corresponding measurement point according to the control instruction, and output the vibration data to the terminal;接收端,配置成接收卫星秒脉冲信号以获取卫星标准时间;A receiving end configured to receive a satellite second pulse signal to obtain a satellite standard time;所述存储器存储有计算机程序,所述处理器执行所述计算机程序以根据所述卫星秒脉冲信号消除所述终端接收到的振动数据中的***时间误差。The memory stores a computer program, and the processor executes the computer program to eliminate a system time error in the vibration data received by the terminal according to the satellite second pulse signal.
- 根据权利要求1所述的分布式振动连续监测***,其特征在于,所述采集单元包括采集模块与传感器,所述采集模块配置成根据所述控制指令执行编译程序以驱动所述传感器并向所述终端传输所述对应测量点的振动数据,所述传感器配置成采集所述对应测量点的振动数据。The distributed vibration continuous monitoring system according to claim 1, wherein the acquisition unit includes an acquisition module and a sensor, and the acquisition module is configured to execute a compiled program according to the control instruction to drive the sensor and provide the The terminal transmits vibration data of the corresponding measurement point, and the sensor is configured to collect vibration data of the corresponding measurement point.
- 根据权利要求2所述的分布式振动连续监测***,其特征在于,所述***时间误差包括时钟误差、程序时差与丢包时差,所述时钟误差为所述终端的时钟源相对于所述卫星标准时间的误差,所述程序时差为所述编译程序的运行时间相对于标准运行时间的误差,所述丢包时差为由各个子***中的所述采集模块与所述终端之间数据传输的丢包率差异引起的时间误差。The distributed vibration continuous monitoring system according to claim 2, wherein the system time error includes a clock error, a program time difference, and a packet loss time difference, and the clock error is a clock source of the terminal relative to the satellite Standard time error, the program time difference is the error of the runtime of the compiler relative to the standard time, and the packet loss time difference is the data transmission between the acquisition module and the terminal in each subsystem Time error caused by difference in packet loss rate.
- 根据权利要求3所述的分布式振动连续监测***,其特征在于,所述时钟源为本地时钟,所述本地时钟的秒信号由本地晶振、铷钟或铯钟经分频得到。The distributed vibration continuous monitoring system according to claim 3, wherein the clock source is a local clock, and the second signal of the local clock is obtained by dividing the local crystal, chirped clock, or cesium clock.
- 根据权利要求3所述的分布式振动连续监测***,其特征在于,所述计算机程序包括以下步骤:The distributed continuous vibration monitoring system according to claim 3, wherein the computer program comprises the following steps:根据所述卫星秒脉冲信号消除所述时钟误差与所述程序时差;Eliminating the clock error and the program time difference according to the satellite second pulse signal;根据所述卫星秒脉冲信号消除所述丢包时差。Eliminating the packet loss time difference according to the satellite second pulse signal.
- 根据权利要求5所述的分布式振动连续监测***,其特征在于,所述传感器为配置成采集加速度信号的加速度传感器,“根据所述卫星秒脉冲信号消除所述时钟误差与所述程序时差”包括以下步骤:The distributed vibration continuous monitoring system according to claim 5, wherein the sensor is an acceleration sensor configured to collect an acceleration signal, and "the clock error and the program time difference are eliminated according to the satellite second pulse signal" It includes the following steps:获取于所述控制指令发出后的首个卫星秒脉冲信号;Acquiring the first satellite second pulse signal after the control instruction is issued;捕捉所述首个卫星秒脉冲信号的上升沿起点作为同步起点;Capture the starting point of the rising edge of the first satellite second pulse signal as the starting point of synchronization;截取所述同步起点后的加速度信号作为所述对应测量点的振动数据。The acceleration signal after the synchronization starting point is intercepted as the vibration data of the corresponding measurement point.
- 根据权利要求5所述的分布式振动连续监测***,其特征在于,“根据所述卫星秒脉冲信号消除所述丢包时差”包括以下步骤:The distributed vibration continuous monitoring system according to claim 5, wherein "eliminating the packet loss time difference based on the satellite second pulse signal" includes the following steps:根据所述预设采样频率与同步采样时长确定所述丢包时差;Determining the packet loss time difference according to the preset sampling frequency and the synchronous sampling duration;根据所述丢包时差对应地对所述终端接收到的振动数据进行补偿。Compensate correspondingly the vibration data received by the terminal according to the packet loss time difference.
- 根据权利要求7所述的分布式振动连续监测***,其特征在于,“根据所述预设采样频率与同步采样时长确定所述丢包时差”包括以下步骤:The distributed continuous vibration monitoring system according to claim 7, wherein "determining the packet loss time difference according to the preset sampling frequency and the synchronous sampling time" includes the following steps:获取于所述控制指令发出后的首个卫星秒脉冲信号;Acquiring the first satellite second pulse signal after the control instruction is issued;捕捉所述首个卫星秒脉冲信号的上升沿起点作为同步起点;Capture the starting point of the rising edge of the first satellite second pulse signal as the starting point of synchronization;根据所述同步起点、所述预设采样频率与所述同步采样时长计算理论同步终点;Calculating a theoretical synchronization end point according to the synchronization start point, the preset sampling frequency, and the synchronization sampling duration;根据所述同步起点与所述同步采样时长索引实际同步终点;Index the actual synchronization end point according to the synchronization start point and the synchronization sampling duration;根据所述理论同步终点、所述实际同步终点与所述预设采样频率确定所述丢包时差。Determining the packet loss time difference according to the theoretical synchronization end point, the actual synchronization end point, and the preset sampling frequency.
- 根据权利要求8所述的分布式振动连续监测***,其特征在于,所述实际同步终点为另一卫星秒脉冲信号的上升沿起点。The distributed continuous vibration monitoring system according to claim 8, wherein the actual synchronization end point is a rising edge start point of another satellite second pulse signal.
- 根据权利要求7所述的分布式振动连续监测***,其特征在于,所述同步采样时长不大于所述预设采样时长,且为所述卫星秒脉冲信号的周期的整数倍数值中的最大值。The distributed vibration continuous monitoring system according to claim 7, wherein the synchronous sampling duration is not greater than the preset sampling duration and is a maximum value of an integer multiple of a period of the satellite second pulse signal .
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CN101776767A (en) * | 2010-02-08 | 2010-07-14 | 北京豪仪测控工程有限公司 | Wireless seismic detector system |
CN102859334A (en) * | 2010-03-24 | 2013-01-02 | 魁北克水电公司 | Method And System For The Time Synchronization Of The Phase Of Signals From Respective Measurement Devices |
CN104316168A (en) * | 2014-11-19 | 2015-01-28 | 中国人民解放军总参谋部工程兵科研三所 | Self-calibration networking type wireless vibration tester |
CN108847921A (en) * | 2018-07-06 | 2018-11-20 | 哈尔滨工业大学(深圳) | Distribution vibration continuous monitor system |
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CN108847921A (en) | 2018-11-20 |
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