CN102928073A - Phase-congruency-based vibration noise filtering method - Google Patents
Phase-congruency-based vibration noise filtering method Download PDFInfo
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- CN102928073A CN102928073A CN2012104850097A CN201210485009A CN102928073A CN 102928073 A CN102928073 A CN 102928073A CN 2012104850097 A CN2012104850097 A CN 2012104850097A CN 201210485009 A CN201210485009 A CN 201210485009A CN 102928073 A CN102928073 A CN 102928073A
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Abstract
The invention discloses a phase-congruency-based vibration noise filtering method. The method comprises the following steps that: four sensors are utilized to respectively measure vibration signals at intervals of 1/4 period; after being amplified by an amplifier, the vibration signals are respectively delayed for 1/4 period in accordance with an inverted order, and subsequently overlapped; when being overlapped, the in-phase of desired signals is ensured; and the signal to noise ratio of the signals is increased by utilizing the principle that the signals can be enhanced by overlapping in-phase signals and the signals are weakened by overlapping non-in-phase signals. By utilizing the method, the signal to noise ratio of vibration signals in the vibration measurement process can be increased greatly, and the noise in the vibration signals can be filtered.
Description
Technical field
The invention belongs to the vibration survey field, particularly a kind of vibration noise filtering method based on Phase Stacking.
Background technology
In the vibration survey field, when sensor obtains vibration signal, usually be accompanied by much noise, after advancing amplifying circuit, noise error also is exaggerated, and causes final measurement result to have larger error, therefore, need a kind of vibration noise filtering method, improve signal to noise ratio (S/N ratio).
Summary of the invention
Order of the present invention is to provide a kind of vibration noise filtering method based on Phase Stacking.
The technical scheme that realizes above-mentioned purpose is: a kind of vibration noise filtering method based on Phase Stacking, comprise four sensor 1-4, four amplifier 1-4, and totalizer, wherein, comprise four sensor 1-4, four signal V1-V4, four amplifier 1-4, three signal Vs2-Vs4, four signal Vo1-Vo4 and totalizer, wherein, the described signal V1 of described sensor 1 output is to described amplifier 1 input, described signal Vo1 is to described totalizer input in described amplifier 1 output, the described signal V2 of described sensor 2 outputs is to described amplifier 2 inputs, the described signal Vs2 of described amplifier 2 outputs produces described signal Vo2 through time-delay 1/4 all after dates, described signal Vo2 is connected to described totalizer input, the described signal V3 of described sensor 3 outputs is to described amplifier 3 inputs, the described signal VS3 of described amplifier 3 outputs produces described signal Vo3 through 1/2 cycle of time-delay, described signal Vo3 is connected to described totalizer input, the described signal V4 of described sensor 4 outputs is to described amplifier 4 inputs, the described signal Vs4 of described amplifier 4 outputs produces described signal Vo4 through 3/4 cycle of time-delay, described signal Vo4 is connected to described totalizer input, output after the described signal Vo1-Vo4 stack that totalizer will be inputted.
The method of counting of above-mentioned a kind of high-speed pulse, wherein, the sampling time reference point is T0, be T measuring period, described sensor 1 is at time T 0+T moment sampled measurements vibration signal, described sensor 2 is at time T 0+3T/4 moment sampled measurements vibration signal, and described sensor 3 is at time T 0+T/2 moment sampled measurements vibration signal, and described sensor 4 is at time T 0+T/4 moment sampled measurements vibration signal.
The invention has the beneficial effects as follows: the present invention can improve the signal to noise ratio (S/N ratio) of vibration signal in the vibration survey process, the noise in the filtering vibration signal greatly.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
See also Fig. 1, provide a kind of vibration noise filtering method based on Phase Stacking among the figure and comprised four sensor 1-4, four signal V1-V4, four amplifier 1-4, three signal Vs2-Vs4, four signal Vo1-Vo4 and totalizer, wherein, sensor 1 output signal V1 is to amplifier 1 input, amplifier 1 output signal Vo1 inputs to totalizer, sensor 2 output signal V2 are to amplifier 2 inputs, amplifier 2 output signal Vs2 produce signal Vo2 through time-delay 1/4 all after dates, signal Vo2 is connected to the totalizer input, sensor 3 output signal V3 are to amplifier 3 inputs, amplifier 3 output signal VS3 produce signal Vo3 through 1/2 cycle of time-delay, signal Vo3 is connected to the totalizer input, sensor 4 output signal V4 are to amplifier 4 inputs, amplifier 4 output signal Vs4 produce signal Vo4 through 3/4 cycle of time-delay, signal Vo4 is connected to the totalizer input, exports after the signal Vo1-Vo4 stack of totalizer with input.
The sampling time reference point is T0, be T measuring period, sensor 1 is at time T 0+T moment sampled measurements vibration signal, sensor 2 is at time T 0+3T/4 moment sampled measurements vibration signal, sensor 3 is at time T 0+T/2 moment sampled measurements vibration signal, and sensor 4 is at time T 0+T/4 moment sampled measurements vibration signal.
The ultimate principle of this law is: four sensor difference interval 1/4 period measurement vibration signals, after the amplifier amplification, delay time respectively according to inverted order and to superpose after 1/4 cycle, guaranteed the same-phase of required signal during stack, utilize the same-phase signal stack can strengthen signal, the principle that non-synchronous signal stack can slacken improves Signal-to-Noise.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not consist of limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (2)
1. vibration noise filtering method based on Phase Stacking, it is characterized in that, comprise four sensor 1-4, four signal V1-V4, four amplifier 1-4, three signal Vs2-Vs4, four signal Vo1-Vo4 and totalizer, wherein, the described signal V1 of described sensor 1 output is to described amplifier 1 input, described signal Vo1 is to described totalizer input in described amplifier 1 output, the described signal V2 of described sensor 2 outputs is to described amplifier 2 inputs, the described signal Vs2 of described amplifier 2 outputs produces described signal Vo2 through time-delay 1/4 all after dates, described signal Vo2 is connected to described totalizer input, the described signal V3 of described sensor 3 outputs is to described amplifier 3 inputs, the described signal VS3 of described amplifier 3 outputs produces described signal Vo3 through 1/2 cycle of time-delay, described signal Vo3 is connected to described totalizer input, the described signal V4 of described sensor 4 outputs is to described amplifier 4 inputs, the described signal Vs4 of described amplifier 4 outputs produces described signal Vo4 through 3/4 cycle of time-delay, described signal Vo4 is connected to described totalizer input, output after the described signal Vo1-Vo4 stack that totalizer will be inputted.
2. the method for counting of a kind of high-speed pulse according to claim 1, it is characterized in that, sampling time benchmark ground is T0, be T measuring period, described sensor 1 is at time T 0+T moment sampled measurements vibration signal, described sensor 2 is at time T 0+3T/4 moment sampled measurements vibration signal, and described sensor 3 is at time T 0+T/2 moment sampled measurements vibration signal, and described sensor 4 is at time T 0+T/4 moment sampled measurements vibration signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104850097A CN102928073A (en) | 2012-11-26 | 2012-11-26 | Phase-congruency-based vibration noise filtering method |
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| CN2012104850097A CN102928073A (en) | 2012-11-26 | 2012-11-26 | Phase-congruency-based vibration noise filtering method |
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| CN102928073A true CN102928073A (en) | 2013-02-13 |
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| CN2012104850097A Pending CN102928073A (en) | 2012-11-26 | 2012-11-26 | Phase-congruency-based vibration noise filtering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556460A (en) * | 2015-09-30 | 2017-04-05 | 仓敷化工株式会社 | Actively go vibrating device and this actively go vibrating device vibrating sensor method to set up |
| CN107785025A (en) * | 2016-08-25 | 2018-03-09 | 上海英波声学工程技术股份有限公司 | Noise remove method and device based on room impulse response duplicate measurements |
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| US4062237A (en) * | 1976-05-07 | 1977-12-13 | Fox Martin D | Crossed beam ultrasonic flowmeter |
| JPH0350998A (en) * | 1989-07-19 | 1991-03-05 | Fujitsu Ten Ltd | Noise reduction device |
| JPH04271599A (en) * | 1991-02-26 | 1992-09-28 | Sharp Corp | Sound collection device |
| CN102004247A (en) * | 2010-09-09 | 2011-04-06 | 北京航空航天大学 | Passive synthesis aperture rapid-scanning and imaging system |
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2012
- 2012-11-26 CN CN2012104850097A patent/CN102928073A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062237A (en) * | 1976-05-07 | 1977-12-13 | Fox Martin D | Crossed beam ultrasonic flowmeter |
| JPH0350998A (en) * | 1989-07-19 | 1991-03-05 | Fujitsu Ten Ltd | Noise reduction device |
| JPH04271599A (en) * | 1991-02-26 | 1992-09-28 | Sharp Corp | Sound collection device |
| CN102004247A (en) * | 2010-09-09 | 2011-04-06 | 北京航空航天大学 | Passive synthesis aperture rapid-scanning and imaging system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556460A (en) * | 2015-09-30 | 2017-04-05 | 仓敷化工株式会社 | Actively go vibrating device and this actively go vibrating device vibrating sensor method to set up |
| CN106556460B (en) * | 2015-09-30 | 2020-02-18 | 仓敷化工株式会社 | Active vibration elimination device and setting method of vibration sensor of active vibration elimination device |
| CN107785025A (en) * | 2016-08-25 | 2018-03-09 | 上海英波声学工程技术股份有限公司 | Noise remove method and device based on room impulse response duplicate measurements |
| CN107785025B (en) * | 2016-08-25 | 2021-06-22 | 上海英波声学工程技术股份有限公司 | Noise removal method and device based on repeated measurement of room impulse response |
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Application publication date: 20130213 |