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Effective vibration data interception method based on waveform characteristic statistics

A technology of vibration data and waveform characteristics, applied in special data processing applications, electrical digital data processing, alarms relying on interference short-wavelength radiation, etc. It can solve the problems of high reliability, avoid interference, and high real-time performance.

Active Publication Date: 2015-02-11
CHINA ELECTRONIS TECH INSTR CO LTD
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Problems solved by technology

The existing vibration signal interception algorithm mainly adopts the short-term energy method and the short-time zero-crossing rate method. These two algorithms have complex algorithms, low computing efficiency, low real-time performance, and are easily disturbed by noise. Strong and other defects, it is difficult to meet the real-time monitoring and high reliability requirements of the MZ fiber optic perimeter intrusion monitoring instrument

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  • Effective vibration data interception method based on waveform characteristic statistics
  • Effective vibration data interception method based on waveform characteristic statistics
  • Effective vibration data interception method based on waveform characteristic statistics

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Embodiment 1

[0032] like figure 1 As shown, the present invention provides a kind of effective vibration data intercepting method based on waveform characteristic statistics, wherein, comprise the following steps:

[0033] Step 101: Obtain the copy data DC[N] of the original vibration data D[N];

[0034] Step 102: analyze DC[N], and calculate the peaks and valleys in DC[N];

[0035] Step 103: Set the values ​​of all points that are neither peaks nor valleys in DC[N] to 0;

[0036] Step 104: Set the values ​​of all peak and valley points in DC whose absolute value is smaller than the filtering threshold TW to 0;

[0037] Step 105: Divide the DC into M continuous segments, the data length of each segment is L=N / M;

[0038] Step 106: Calculate the sum of the absolute values ​​of all points in each segment from DC[1] to DC[M] DCS[1]~DCS[M];

[0039] Step 107: Find the maximum value DCSMAX among DCS[1]~DCS[M];

[0040] Step 108: judging whether DCSMAX is greater than the peak threshold TM,...

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Abstract

The invention provides an effective vibration data interception method based on waveform characteristic statistics. Filtering of a noise peak and interception of a vibration signal are realized by performing statistics on a waveform characteristic of acquired data based on a waveform characteristic of the vibration signal. With the adoption of the scheme, interference of a useless signal is effectively avoided, the operation times and a false alarm rate of a system are reduced, and the method is low in algorithm operand, high in timeliness, high in reliability and low in false alarm rate.

Description

technical field [0001] The invention belongs to the technical field of effective vibration data interception, and in particular relates to an effective vibration data interception method based on waveform feature statistics. Background technique [0002] Based on the Mach-Zehnder interference principle, the MZ optical fiber perimeter intrusion monitoring instrument uses optical fiber cables to detect external vibrations and identify illegal intrusions. It has strong anti-electromagnetic interference and can realize long-distance real-time monitoring and positioning of vibrations caused by perimeter intrusions. As the key technology of the perimeter security system, the real-time precise positioning of intrusion is one of the main research directions of the perimeter detection and early warning system. In practical applications, signals are collected into the system in real time. If a series of calculations are performed on all input signals, the system will inevitably fail t...

Claims

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Application Information

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IPC IPC(8): G06F19/00G08B13/18G01H9/00
Inventor 袁明王广彪魏石磊李宝瑞
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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