CN105547709A - Marine diesel engine torsional vibration signal processing method and device - Google Patents
Marine diesel engine torsional vibration signal processing method and device Download PDFInfo
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- CN105547709A CN105547709A CN201510916335.2A CN201510916335A CN105547709A CN 105547709 A CN105547709 A CN 105547709A CN 201510916335 A CN201510916335 A CN 201510916335A CN 105547709 A CN105547709 A CN 105547709A
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- torsional vibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/12—Testing internal-combustion engines by monitoring vibrations
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a marine diesel engine torsional vibration signal processing method. The method includes the following steps that: intensive resampling is performed on a marine diesel engine signals, and zero position detection is performed; and interpolation processing is performed on obtained signals, zero position detection is performed on sampling signals, a transformation point is searched, a zero-crossing time point is determined, and interpolation processing iteration is performed to obtain high-sampling marine diesel engine torsional vibration signals. According to the method of the invention, intensive resampling can be performed on obtained torsional vibration signals; a signal interpolation starting point is determined through the zero position detection, so that interpolation processing can be performed on the signals, and missing points existing in the signals are compensated; and the high-sampling marine diesel engine torsional vibration signals can be obtained through a plurality of times of signal zero position detection and interpolation processing, and the absolute error of the signal is smaller than 5%.
Description
Technical field
The present invention relates to Diesel Engine Technique Field, particularly relate to a kind of marine diesel torsional vibration signals disposal route and device.
Background technology
Torsional vibration measurement can be divided into two classes: the 1) measurement of axle system twisting stress, 2) measurement of axle system torsional angle.The torsional vibration measurement that we often say is actually measures axle system torsional angle.Conventional sensor has: electromagnetic type, photo-electric, electric vortex type, Hall-type etc.According to pick-up device by former contact till now contactless.The extracting mode of torsional vibration signals by machinery inertial torsiograph to intelligent torsional oscillation instrument, then digitizing torsional oscillation type test macro by now.Corresponding measuring accuracy also has sizable raising, although there is the raising of these aspects above, before comparing, torsional vibration measurement is now closer to actual value, but also still have much room for improvement. due to computer technology, software engineering and production technology improve constantly, have developed the relatively accurate vialog of measurement at present both at home and abroad, as: professor Chen Xien etc. of CCS Wuhan branch develops ZDCL-III shafting vibration analyzer, the ANZT type torsiograph of Southeast China University professor Du Jisheng development.
Magnetoelectric tachometric transducer (or photoelectric encoder) is adopted to detect original, through signal transformation circuit, original class sinusoidal signal is become the TTL signal of standard, utilize the counter of capture card to TTL signal-count, transient speed can be calculated, and tooth average treatment average through the cycle again, transient speed signals clearly can be obtained, torsional oscillation time domain data can be obtained through integration, carry out FFT computing and can obtain torsional oscillation frequency domain data, difficult for there is location, signal zero position when high speed transient speed signals is converted into torsional vibration signals at present, there is missing number strong point, the problems such as torsional vibration signals low precision.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide a kind of marine diesel torsional vibration signals disposal route and device, in order to solve the problem that location, existing signal zero position is difficult, there is missing number strong point, torsional vibration signals low precision.
The invention provides a kind of marine diesel torsional vibration signals disposal route, comprising:
Carry out intensive resampling to the original torsional vibration signals obtained, the torsional vibration signals through intensive resampling carries out zero testing;
When defining zero-acrross ing moment, interpolation is carried out to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until do not have zero-acrross ing moment.
Further, described intensive resampling adopts the resampling rate being greater than 200KHz to process torsional vibration signals, and the torsional vibration signals through intensive resampling carries out zero testing.
Further, lagrange polynomial is adopted to carry out interpolation.
Present invention also offers a kind of marine diesel torsional vibration signals treating apparatus, comprising:
Sampling module, for carrying out intensive resampling to the original torsional vibration signals obtained;
Zero testing and interpolation processing module, for carrying out zero testing to the torsional vibration signals through intensive resampling, when defining zero-acrross ing moment, interpolation is carried out to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until do not have zero-acrross ing moment.
Further, described sampling module carries out intensive resampling is adopt the resampling rate being greater than 200KHz to process torsional vibration signals.
Further, lagrange polynomial is adopted to carry out interpolation.
Beneficial effect of the present invention is as follows:
The present invention can carry out intensive resampling promotion signal precision to the torsional vibration signals obtained; Realizing determining that signal interpolation starting point carries out interpolation processing to signal by zero testing, there is missing point in supplementary signal; Multiple signal zero testing and interpolation processing obtain the marine diesel torsional vibration signals of high sampling, and signal absolute error is less than 5%.
Other features and advantages of the present invention will be set forth in the following description, and, becoming apparent from instructions of part, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing only for illustrating the object of specific embodiment, and does not think limitation of the present invention, and in whole accompanying drawing, identical reference symbol represents identical parts.
Fig. 1 is the schematic flow sheet of method described in the embodiment of the present invention;
Fig. 2 in method described in the embodiment of the present invention, treated torsional vibration signals peculiar to vessel and high sample frequency torsional vibration signals;
Fig. 3 is the structural representation of device described in the embodiment of the present invention.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.
First, method described in the embodiment of the present invention is described in detail.
As shown in Figure 1, the schematic flow sheet of method described in Fig. 1 embodiment of the present invention, mainly comprise: adopt the resampling rate of mHz (m>200k) to process torsional vibration signals to the original torsional vibration signals that marine diesel torsional vibration signal acquisition system obtains, torsional vibration signals through intensive resampling carries out zero testing, when defining zero-acrross ing moment, Lagrange Polynomial interpolating is adopted to carry out interpolation to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until there is no zero-acrross ing moment.
Fig. 2 shows comparing of treated torsional vibration signals peculiar to vessel and high sample frequency torsional vibration signals (200KHz), signal and the actual signal of the acquisition of direct employing high sample frequency collection torsional vibration signals are very close, and sample frequency is higher, sampled point is more close to actual signal amplitude, measuring accuracy is higher, but sample frequency is higher, required time and hardware cost be corresponding raising also, the torsional vibration signals of low sample frequency is treated to the torsional vibration signals that high sample frequency obtains by the torsional vibration signals disposal route that the present invention studies, and signal absolute error is less than 5%.
Then by reference to the accompanying drawings device described in the embodiment of the present invention is described in detail.
As shown in Figure 3, Fig. 3 is the structural representation of device described in the embodiment of the present invention, specifically can comprise:
Sampling module, for carrying out intensive resampling to the original torsional vibration signals obtained;
Zero testing and interpolation processing module, for carrying out zero testing to the torsional vibration signals through intensive resampling, when defining zero-acrross ing moment, interpolation is carried out to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until do not have zero-acrross ing moment.
Wherein, it is adopt the resampling rate being greater than 200KHz to process torsional vibration signals that sampling module carries out intensive resampling; What zero testing and difference processing module adopted is that lagrange polynomial carries out interpolation processing.
For the specific implementation process of device described in the embodiment of the present invention, owing to being described in detail in said method, so place repeats no more.
In sum, embodiments provide a kind of marine diesel torsional vibration signals disposal route and device, intensive resampling promotion signal precision can be carried out to the torsional vibration signals obtained; Realizing determining that signal interpolation starting point carries out interpolation processing to signal by zero testing, there is missing point in supplementary signal; Multiple signal zero testing and interpolation processing obtain the marine diesel torsional vibration signals of high sampling, and absolute error is less than 5%.
It will be understood by those skilled in the art that all or part of flow process realizing above-described embodiment method, the hardware that can carry out instruction relevant by computer program has come, and described program can be stored in computer-readable recording medium.Wherein, described computer-readable recording medium is disk, CD, read-only store-memory body or random store-memory body etc.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (6)
1. a marine diesel torsional vibration signals disposal route, is characterized in that, comprising:
Carry out intensive resampling to the original torsional vibration signals obtained, the torsional vibration signals through intensive resampling carries out zero testing;
When defining zero-acrross ing moment, interpolation is carried out to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until do not have zero-acrross ing moment.
2. a kind of marine diesel torsional vibration signals disposal route according to claim 1, described intensive resampling adopts the resampling rate being greater than 200KHz to process torsional vibration signals, and the torsional vibration signals through intensive resampling carries out zero testing.
3. a kind of marine diesel torsional vibration signals disposal route according to claim 1, adopts lagrange polynomial to carry out interpolation.
4. a marine diesel torsional vibration signals treating apparatus, is characterized in that, comprising:
Sampling module, for carrying out intensive resampling to the original torsional vibration signals obtained;
Zero testing and interpolation processing module, for carrying out zero testing to the torsional vibration signals through intensive resampling, when defining zero-acrross ing moment, interpolation is carried out to the torsional vibration signals of intensive resampling, again zero testing is carried out to the torsional vibration signals through interpolation, if determine torsional vibration signals zero-acrross ing moment, interpolation processing iteration obtains the marine diesel torsional vibration signals of high sampling again, until do not have zero-acrross ing moment.
5. a kind of marine diesel torsional vibration signals disposal route according to claim 4, it is adopt the resampling rate being greater than 200KHz to process torsional vibration signals that described sampling module carries out intensive resampling.
6. a kind of marine diesel torsional vibration signals disposal route according to claim 4, adopts lagrange polynomial to carry out interpolation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510916335.2A CN105547709A (en) | 2015-12-10 | 2015-12-10 | Marine diesel engine torsional vibration signal processing method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510916335.2A CN105547709A (en) | 2015-12-10 | 2015-12-10 | Marine diesel engine torsional vibration signal processing method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380603A (en) * | 2018-12-29 | 2020-07-07 | 上海齐耀系统工程有限公司 | Torsional vibration monitoring device for diesel engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508605A (en) * | 1994-05-24 | 1996-04-16 | Alliedsignal Inc. | Method for measuring RF pulse frequency |
| CN102128656A (en) * | 2011-02-25 | 2011-07-20 | 合肥工业大学 | Slightly bent Koch mass flow meter digital signal processing method and system |
-
2015
- 2015-12-10 CN CN201510916335.2A patent/CN105547709A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5508605A (en) * | 1994-05-24 | 1996-04-16 | Alliedsignal Inc. | Method for measuring RF pulse frequency |
| CN102128656A (en) * | 2011-02-25 | 2011-07-20 | 合肥工业大学 | Slightly bent Koch mass flow meter digital signal processing method and system |
Non-Patent Citations (3)
| Title |
|---|
| 杨建国: "基于LabVIEW的扭振测量仪开发", 《中国测试技术》 * |
| 胡旭钢: "柴油机轴系扭振监测方法研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 颜运涛: "船舶柴油机轴系扭振测试系统的开发", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380603A (en) * | 2018-12-29 | 2020-07-07 | 上海齐耀系统工程有限公司 | Torsional vibration monitoring device for diesel engine |
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