WO2017201902A1 - 一种便携式本安型振动信号采集装置及振动信息采集方法 - Google Patents

一种便携式本安型振动信号采集装置及振动信息采集方法 Download PDF

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WO2017201902A1
WO2017201902A1 PCT/CN2016/096329 CN2016096329W WO2017201902A1 WO 2017201902 A1 WO2017201902 A1 WO 2017201902A1 CN 2016096329 W CN2016096329 W CN 2016096329W WO 2017201902 A1 WO2017201902 A1 WO 2017201902A1
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signal
vibration signal
vibration
intrinsically safe
unit
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PCT/CN2016/096329
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English (en)
French (fr)
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王亮
高洁
曾庆良
刘志海
李连杰
王成龙
张鑫
万丽荣
江守波
李永庆
张士奇
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山东科技大学
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Priority to AU2016407651A priority Critical patent/AU2016407651A1/en
Publication of WO2017201902A1 publication Critical patent/WO2017201902A1/zh
Priority to US16/004,523 priority patent/US20180292256A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/0802—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions

Definitions

  • the invention relates to a portable intrinsically safe vibration signal collecting device and a vibration information collecting method, and belongs to the technical field of information acquisition and equipment condition monitoring.
  • Vibration detection is an important tool for equipment condition monitoring and fault diagnosis.
  • the device is particularly important in the process of measuring valid real data.
  • the existing vibration testing mainly includes the following patents:
  • Chinese patent CN204649304U provides a portable crystallizer vibration detecting system, comprising a crystallizer and a portable industrial computer connected to the crystallizer, wherein the portable industrial computer is provided with a PCI data acquisition card, and the PCI data acquisition card is connected with a signal conditioner.
  • the signal conditioner is externally connected with a portable sensor box, and the portable sensor box is provided with a three-axis acceleration sensor, and the portable sensor box is disposed on the crystallizer.
  • Chinese patent CN105043729A provides a monitoring and early warning method for loosening of a suspension device, the method comprising: a suspension device is equipped with a three-axis acceleration sensor, the three-axis acceleration sensor collecting vibration information of the suspension device, and the vibration is The information is reported to the signal processor; the signal processor acquires the vibration information, and searches for vibration data for reference according to the hanging device identifier carried in the message transmitting the vibration information; the signal processor according to the Vibration data, analyzing the vibration information, and determining an operating state of the suspension device.
  • Chinese patent CN205032666U discloses a portable crystallizer vibration detecting device for a continuous casting machine, comprising a portable sensor box, wherein the portable sensor box is provided with a three-axis acceleration sensor and a signal transmitter connected to the three-axis acceleration sensor, The signal transmitter is connected to the PCI data acquisition card through a data line, and the PCI data acquisition card is connected to the portable industrial computer.
  • Chinese patent CN105547451A discloses a new method for spatially coupled vibration testing of high speed train wheels.
  • the method utilizes a three-axis wireless acceleration sensor to sense three-direction acceleration sensors on the X, Y, and Z directions, and simultaneously picks up vibration signals in three directions of lateral, longitudinal, and axial directions of the wheel, and transmits vibration analog signals in three directions to the amplifier.
  • the second-order low-pass filter is processed by the source, and the signal-to-noise ratio is improved, and then processed and stored by the signal processing unit to obtain an electrical signal, and the wireless transmitting module performs data exchange with the processing unit through the SPI interface to complete wireless transmission of data.
  • the present invention provides a portable intrinsically safe vibration signal acquisition device.
  • the present invention also provides a method of implementing vibration information acquisition using the above apparatus.
  • a portable intrinsically safe vibration signal collecting device comprises a vibration signal collecting unit, a signal processing unit, a signal storage unit and an intrinsically safe power source;
  • the vibration signal acquisition unit is connected to the signal storage unit by the signal processing unit, and the intrinsically safe power supply supplies power to the respective units; the signal processing unit and the signal storage unit are integrally packaged in an intrinsically safe package.
  • the vibration signal acquisition unit collects a vibration signal of the device to be tested, and the signal processing unit filters and amplifies the vibration signal, and stores it in the signal storage unit for subsequent analysis by the remote analysis processing system. .
  • the vibration signal acquisition unit is installed on the surface of the device to be tested to realize real-time monitoring of the vibration signal, and the signal processing unit and the signal storage unit are installed in the remote source region to monitor the vibration signal in real time.
  • the vibration signal acquisition unit is mounted on the device under test by a strong magnetic base.
  • the vibration signal acquisition unit is a three-axis acceleration sensor.
  • the vibration signal acquisition unit is a three-axis IEPE type piezoelectric acceleration sensor. The advantage of using this sensor is that it has good anti-interference performance and high signal quality.
  • the signal processing unit includes a signal conditioning unit, a multi-channel simultaneous sampling ADC chip, and a microcontroller.
  • the microcontroller is a 32-bit ARM Cortex-M4 microcontroller
  • the signal storage unit is an SDHC card.
  • the advantage of the design here is that the vibration monitoring sometimes needs to last for several hours, so a large amount of measurement data is generated, so the present invention uses a large-capacity SDHC card as a data storage medium, and the capacity is up to 64G, which can satisfy the continuation. The need for high speed vibration signal acquisition.
  • the high-performance 32-bit ARM Cortex-M4 microcontroller can be used to read and write SDHC cards at high speed through a dedicated SDIO interface.
  • the present invention uses the widely used open source file system FatFs in storage to directly store the collected binary data.
  • the remote analysis processing system can directly read the vibration signal data from the file of the SDHC card, thereby improving the real-time acquisition efficiency of the vibration information.
  • the vibration signal acquisition unit and the signal processing unit pass between the shielded cable and the fast Speed air connectors are connected. Improve the overall operational safety and anti-interference of the device.
  • the intrinsically safe power supply is an integrated multi-channel powered intrinsically safe lithium battery.
  • the present invention supplies power to various components by voltage conversion. All modules, discrete devices, etc. use low power products.
  • the unit is capable of continuous operation for 24 hours.
  • the vibration information acquisition sensor unit, the communication cable, the low power signal conditioning unit, and the real time storage unit are powered.
  • the integrated multi-channel power supply can multiplex the energy of the 3.7v intrinsically safe lithium battery and provide power for the excitation voltage and conditioning unit of the three-axis acceleration sensor.
  • the signal conditioning unit comprises a 4th order Butterworth anti-aliasing filter.
  • the spectrum of the vibration signal is generally wide.
  • the analog signal input to the ADC needs to be anti-aliased and filtered to prevent the unwanted high-frequency signal from being superimposed on the low frequency band.
  • the present invention designs a 4th order Butterworth filter with a cutoff frequency of 10 kHz and a 40 dB stopband of 40 kHz. Can be used for applications where the useful signal to be tested is below 10 kHz.
  • a vibration information collecting method comprises: a three-axis acceleration sensor real-time acquiring a three-axis vibration signal when the device under test is working; filtering and amplifying the vibration signal and storing the signal in a signal storage unit; finally, for remote analysis and processing
  • the system selectively or in real time acquires vibration signals from the signal storage unit for analysis.
  • the vibration information collecting method comprises: simultaneously sampling a three-axis vibration acceleration signal using an independent 16-bit multi-channel simultaneous sampling ADC chip, and using a fourth-order Butterworth anti-aliasing filter for vibration
  • the signal is filtered and amplified.
  • the design ensures the integrity and correctness of the spatial vibration signal.
  • the accuracy can be improved by 1.5 bits by using 8 times oversampling technology.
  • the invention solves the problem of collecting vibration signals of mobile large-scale electromechanical equipment (such as shield machine, shearer, etc.), and provides powerful data guarantee for equipment working state monitoring and fault analysis, especially for intrinsically safe design to meet complex and poor underground coal mine mobile equipment. Test requirements.
  • the device has the characteristics of easy installation, low power consumption, convenient control, flexible use and wide application range.
  • the invention is applied to the analysis and analysis of the cutting state of the thin coal seam shearer drum, and a large amount of field data is collected to verify the reliability.
  • the device can also be used in the vibration monitoring and fault diagnosis and early warning system of coal mine underground machinery, and has a wide range of applications.
  • Special multi-channel simultaneous sampling ADC chip for analog-to-digital conversion can ensure the simultaneity between channels, avoid the problems caused by three-axis non-simultaneous sampling, and improve the accuracy of collecting vibration signals.
  • Figure 2 is a fourth-order Butterworth anti-aliasing filter of the present invention.
  • Fig. 1 vibration signal acquisition unit; 2, signal conditioning unit; 3, multi-channel simultaneous sampling ADC chip; 4, single-chip; 5, signal storage unit; 6, intrinsically safe power; 7, strong magnetic seat.
  • a portable intrinsically safe vibration signal collecting device comprises a vibration signal collecting unit, a signal processing unit, a signal storage unit and an intrinsically safe power source;
  • the vibration signal acquisition unit is connected to the signal storage unit by the signal processing unit, and the intrinsically safe power supply supplies power to the respective units; the signal processing unit and the signal storage unit are integrally packaged in an intrinsically safe package.
  • the vibration signal acquisition unit is a three-axis acceleration sensor.
  • the vibration signal acquisition unit is a three-axis IEPE type piezoelectric acceleration sensor.
  • a portable intrinsically safe vibration signal collecting device as described in Embodiment 1 is characterized in that the vibration signal collecting unit is mounted on the device to be tested through a strong magnetic base.
  • a portable intrinsically safe vibration signal acquisition device as described in Embodiment 1-2, wherein the signal processing unit comprises a signal conditioning unit, a multi-channel simultaneous sampling ADC chip, and a single chip microcomputer.
  • the single chip microcomputer is a 32-bit ARM Cortex-M4 single chip microcomputer, and the signal storage unit is an SDHC card.
  • the signal conditioning unit includes a 4th order Butterworth anti-aliasing filter.
  • a portable intrinsically safe vibration signal collecting device as described in Embodiments 1-3, wherein the vibration signal collecting unit and the signal processing unit are connected by a shielded cable and a quick air joint.
  • the intrinsically safe power supply is Integrated multi-channel power supply intrinsically safe lithium battery.
  • the vibration information collecting method including the three-axis acceleration sensor, obtains a three-axis vibration signal when the device under test is in operation; and the vibration signal is After filtering and amplifying, it is stored in the signal storage unit; finally, the remote analysis processing system selectively or real-time obtains the vibration signal from the signal storage unit for analysis.
  • the vibration information collecting method described in Embodiment 5 is different in that the vibration information collecting method comprises: simultaneously sampling a three-axis vibration acceleration signal by using an independent 16-bit multi-channel simultaneous sampling ADC chip, and using the fourth order The Butterworth anti-aliasing filter filters and amplifies the vibration signal.

Abstract

一种便携式本安型振动信号采集装置，包括振动信号采集单元（1）、信号处理单元、信号存储单元（5）和本安电源（6）；所述振动信号采集单元（1）通过信号处理单元和信号存储单元（5）相连，所述电源（6）为上述各个单元供电；所述信号处理单元和信号存储单元（5）整体采用本安封装。利用该装置解决了移动大型机电设备振动信号的采集问题，为设备工作状态监控及故障分析提供有力数据保证，尤其进行本安设计满足了复杂恶劣煤矿井下移动设备的测试要求。本装置具有易安装、功耗低、控制方便、使用灵活，应用范围广的特点。

Description

一种便携式本安型振动信号采集装置及振动信息采集方法 技术领域
本发明涉及一种便携式本安型振动信号采集装置及振动信息采集方法，属于信息获取及设备状态监测的技术领域。
背景技术
振动检测是设备状态监测和故障诊断的重要工具，鉴于煤矿井下现场环境恶劣，同时煤矿井下对于设备有行业专门的防爆要求，无法采用一些标准的测试设备进行数据采集，所以设计简单易用的采集装置，在测取有效的真实数据过程中显得尤为重要。
现有的振动检测主要包括如下专利：
中国专利CN204649304U提供一种便携式结晶器振动检测系统，包括结晶器和与结晶器相连接的便携式工控机，所述便携式工控机上设有PCI数据采集卡，所述PCI数据采集卡连接有信号调理器，所述信号调理器外接有便携式传感器盒，所述便携式传感器盒内设有三轴加速度传感器，所述便携式传感器盒设置于结晶器上。
中国专利CN105043729A提供了一种悬挂设备松动故障的监测预警方法，所述方法包括：悬挂设备上安装有三轴向加速度传感器，所述三轴向加速度传感器采集悬挂设备的振动信息，并将所述振动信息上报给信号处理器；所述信号处理器获取所述振动信息，并根据发送所述振动信息的消息中携带的悬挂设备标识，查找用于参考的振动数据；所述信号处理器根据所述振动数据，分析所述振动信息，并确定所述悬挂设备的工作状态。
中国专利CN205032666U公开一种连铸机专用便携式结晶器振动检测装置，包括便携式传感器盒，所述便携式传感器盒内设有三轴加速度传感器及与所述三轴加速度传感器连接的信号变送器，所述信号变送器通过数据线连接PCI数据采集卡，所述PCI数据采集卡连接便携式工控机。
中国专利CN105547451A公开一种高速列车车轮空间耦合振动测试的新方法。该方法利用三轴无线加速度传感器感应部位上X,Y,Z三方向加速度传感器，同时分别拾取车轮横向、纵向、轴向三个方向的振动信号，并将三个方向上的振动模拟信号经放大器放大、再经源二阶低通滤波器的处理，提高信噪比后通过信号处理单元进行处理和储存得到电信号，无线发送模块通过SPI接口与处理单元进行数据交换完成数据的无线传输。
但是上述专利文献并不适用于恶劣施工环境的振动信号采集和处理，针对井下作业设备的实时有效检测就成为现在亟待解决的技术问题。
发明内容
针对现有技术的不足，本发明提供一种便携式本安型振动信号采集装置。
本发明还提供利用上述装置实现振动信息采集的方法。
本发明的技术方案如下：
一种便携式本安型振动信号采集装置，包括振动信号采集单元、信号处理单元、信号存储单元和本安电源；
所述振动信号采集单元通过信号处理单元和信号存储单元相连，所述本安电源为上述各个单元供电；所述信号处理单元和信号存储单元整体采用本安封装。所述振动信号采集单元采集待测设备的振动信号，并由所述信号处理单元对振动信号进行滤波、放大处理，并存储至所述信号存储单元内，供远程分析处理系统对其进行后续分析。其中，所述振动信号采集单元安装在待测设备的表面实现实时监测其振动信号，所述信号处理单元、信号存储单元被安装在远离振源区域对振动信号进行实时监测。
根据本发明优选的，所述振动信号采集单元通过强磁座安装在待测设备上。
根据本发明优选的，所述振动信号采集单元为三轴加速度传感器，优选的，振动信号采集单元为为三轴IEPE型压电加速度传感器。选用此传感器的优点在于，其抗干扰性能好，信号质量高。
根据本发明优选的，所述信号处理单元包括信号调理单元、多通道同时采样ADC芯片和单片机。
根据本发明优选的，所述单片机为32位ARM Cortex-M4单片机，所述信号存储单元为SDHC卡。此处设计的优点在于：针对振动监测有时需要持续多个小时的实际情况，因此会产生大量的测量数据，所以本发明采用大容量SDHC卡作为数据存储介质，容量最高可达64G，能够满足持续高速振动信号采集的需求。为在高速采样下完成数据存储，使用高性能的32位ARM Cortex-M4单片机通过专用的SDIO接口对SDHC卡进行高速读写。为了将采集到的二进制振动加速度信号方便的导入远程分析处理系统，并进行后续的信号分析处理，因此本发明在存储时采用了目前广泛使用的开源文件系统FatFs，直接将采集到的二进制数据存储到.bin格式的文件中，则，远程分析处理系统可以直接从SDHC卡的文件中读取振动信号数据，提高了振动信息的实时获取的效率。
根据本发明优选的，所述振动信号采集单元和信号处理单元之间通过屏蔽电缆和快 速航空接头相连。提高装置整体的运行安全性及抗干扰性。
根据本发明优选的，所述本安电源为集成式多路供电的本安锂电池。本发明通过电压转换为各个部件供电。所有的模块，分立器件等均采用低功耗产品。本装置能够连续工作24小时。为所述振动信息采集传感器单元、通讯电缆、低功耗信号调理单元和实时存储单元供电。此处采用集成式多路供电电源能把3.7v本安型锂电池的电能多路调制后同时用于提供三轴加速度传感器激励电压及调理单元等的供电。
根据本发明优选的，所述信号调理单元包括4阶巴特沃兹抗混叠滤波器。实际使用中振动信号的频谱普遍较宽，为获得有用频段的振动信号，需要对输入ADC的模拟信号进行抗混叠滤波处理，以防止无用高频信号叠加到低频段。本发明设计了4阶巴特沃兹滤波器，其截止频率为10kHz，-40dB阻带为40kHz。能够用于待测有用信号低于10kHz的应用。
一种振动信息采集方法，包括三轴加速度传感器实时获取待测设备工作时的三轴向振动信号；并对所述振动信号进行滤波和放大后储存至信号存储单元中；最后，供远程分析处理系统选择性或实时从信号存储单元中获取振动信号进行分析。
根据本发明优选的，所述振动信息采集方法包括：使用独立的16位多通道同时采样ADC芯片对三轴的振动加速度信号进行同时采样，并利用4阶巴特沃兹抗混叠滤波器对振动信号进行滤波、放大。此处设计保证了空间振动信号的完整性和正确性。同时为了减小前端抗混叠滤波器的设计难度，只需使用8倍过采样技术，即可使精度提高了1.5位。
本发明的优势在于：
本发明解决了移动大型机电设备(如盾构机，采煤机等)振动信号的采集问题，为设备工作状态监控及故障分析提供有力数据保证，尤其进行本安设计满足复杂恶劣煤矿井下移动设备的测试要求。本装置具有易安装、功耗低、控制方便、使用灵活，应用范围广的特点。
本发明应用于薄煤层采煤机滚筒截割状态分析研究中，采集了大量的现场数据，验证了其可靠性。本装置也可用于煤矿井下机械设备振动监测和故障诊断预警系统中，具有广泛的使用范围。
本发明的具体优点如下：
(1)采用具备陀螺仪纠偏功能的三轴加速度传感器，不需要严格确定振动传感器的固定及测试方向；
(2)一体化微型设计，不需考虑信号线布置，并能有效的进行仪器跟机防护；
(3)体积小、重量轻，强磁安装，方便可靠；
(4)本安设计，安全性好，适用井下综采工作面工作环境；
(5)专门的多通道同时采样ADC芯片进行模数转换，可以保证通道间的同时性，避免三轴非同时采样带来的问题，提高采集振动信号的准确性。
附图说明
图1是本发明所述振动信号采集装置中振动信息采集链；
图2是本发明所述4阶巴特沃兹抗混叠滤波器；
在图1中，1、振动信号采集单元；2、信号调理单元；3、多通道同时采样ADC芯片；4、单片机；5、信号存储单元；6、本安电源；7、强磁座。
具体实施方式
下面结合实施例和说明书附图对本发明做详细的说明，但不限于此。
实施例1、
一种便携式本安型振动信号采集装置，包括振动信号采集单元、信号处理单元、信号存储单元和本安电源；
所述振动信号采集单元通过信号处理单元和信号存储单元相连，所述本安电源为上述各个单元供电；所述信号处理单元和信号存储单元整体采用本安封装。
所述振动信号采集单元为三轴加速度传感器，优选的，振动信号采集单元为为三轴IEPE型压电加速度传感器。
实施例2、
如实施例1所述的一种便携式本安型振动信号采集装置，其区别在于，所述振动信号采集单元通过强磁座安装在待测设备上。
实施例3、
如实施例1-2所述的一种便携式本安型振动信号采集装置，其区别在于，所述信号处理单元包括信号调理单元、多通道同时采样ADC芯片和单片机。
所述单片机为32位ARM Cortex-M4单片机，所述信号存储单元为SDHC卡。
所述信号调理单元包括4阶巴特沃兹抗混叠滤波器。
实施例4、
如实施例1-3所述的一种便携式本安型振动信号采集装置，其区别在于，所述振动信号采集单元和信号处理单元之间通过屏蔽电缆和快速航空接头相连。所述本安电源为 集成式多路供电的本安锂电池。
实施例5、
利用实施例1-4所述的一种便携式本安型振动信号采集装置对振动信息采集方法，包括三轴加速度传感器实时获取待测设备工作时的三轴向振动信号；并对所述振动信号进行滤波和放大后储存至信号存储单元中；最后，供远程分析处理系统选择性或实时从信号存储单元中获取振动信号进行分析。
实施例6、
利用实施例5所述的振动信息采集方法，其区别在于，所述振动信息采集方法包括：使用独立的16位多通道同时采样ADC芯片对三轴的振动加速度信号进行同时采样，并利用4阶巴特沃兹抗混叠滤波器对振动信号进行滤波、放大。

Claims (10)

  1. 一种便携式本安型振动信号采集装置，其特征在于，所述装置包括振动信号采集单元、信号处理单元、信号存储单元和本安电源；
    所述振动信号采集单元通过信号处理单元和信号存储单元相连，所述本安电源为上述各个单元供电；所述信号处理单元和信号存储单元整体采用本安封装。
  2. 根据权利要求1所述一种便携式本安型振动信号采集装置，其特征在于，所述振动信号采集单元通过强磁座安装在待测设备上。
  3. 根据权利要求1所述一种便携式本安型振动信号采集装置，其特征在于，所述振动信号采集单元为三轴加速度传感器，优选的，振动信号采集单元为三轴IEPE型压电加速度传感器。
  4. 根据权利要求1所述一种便携式本安型振动信号采集装置，其特征在于，所述信号处理单元包括信号调理单元、多通道同时采样ADC芯片和单片机。
  5. 根据权利要求4所述一种便携式本安型振动信号采集装置，其特征在于，所述单片机为32位ARM Cortex-M4单片机，所述信号存储单元为SDHC卡。
  6. 根据权利要求1所述一种便携式本安型振动信号采集装置，其特征在于，所述振动信号采集单元和信号处理单元之间通过屏蔽电缆和快速航空接头相连。
  7. 根据权利要求1所述一种便携式本安型振动信号采集装置，其特征在于，所述本安电源为集成式多路供电的本安锂电池。
  8. 根据权利要求4所述一种便携式本安型振动信号采集装置，其特征在于，所述信号调理单元包括4阶巴特沃兹抗混叠滤波器。
  9. 利用权利要求1-8任意一项所述便携式本安型振动信号采集装置进行振动信息采集方法，其特征在于，该方法包括三轴加速度传感器实时获取待测设备工作时的三轴向振动信号；并对所述振动信号进行滤波和放大后储存至信号存储单元中；最后，供远程分析处理系统选择性或实时从信号存储单元中获取振动信号进行分析。
  10. 如权利要求9所述的振动信息采集方法，其特征在于，该方法包括：使用独立的16位多通道同时采样ADC芯片对三轴的振动加速度信号进行同时采样，并利用4阶巴特沃兹抗混叠滤波器对振动信号进行滤波、放大。
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