CN105222973A - For the field calibration method of vibration signal order tracking technique - Google Patents
For the field calibration method of vibration signal order tracking technique Download PDFInfo
- Publication number
- CN105222973A CN105222973A CN201510705109.XA CN201510705109A CN105222973A CN 105222973 A CN105222973 A CN 105222973A CN 201510705109 A CN201510705109 A CN 201510705109A CN 105222973 A CN105222973 A CN 105222973A
- Authority
- CN
- China
- Prior art keywords
- vibration
- signal
- field calibration
- tracking technique
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a kind of field calibration method for vibration signal order tracking technique, comprise: the first voltage signal generator and standard capacitance are set and generate vibration simulation signal for field calibration, wherein, the voltage signal that the first voltage signal generator exports is converted to vibration simulation signal through standard capacitance; Second voltage signal generator is set as frequency of signal generator, generates the rotor speed simulating signal being used for field calibration; Vibration simulation signal and rotor speed simulating signal all access on-the-spot vibration measuring system to carry out field calibration, wherein, vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene, and rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal.Calibration steps of the present invention can be calibrated according to the connected mode of the p-wire of on-the-spot vibration measuring system, p-wire length, on-the-spot test environment completely, improves the accuracy of calibration, thus improves vibration and to transfinite the reliability of protection.
Description
Technical field
The present invention relates to vibration-testing and vibration measurement field, especially, relate to a kind of field calibration method for vibration signal order tracking technique.
Background technology
Existing engine vibration measuring system is generally made up of vibration acceleration sensor, charge amplifier, dynamic signal analyzer and PULSE analysis software.Connect an input end of dynamic signal analyzer with reference to Fig. 1, vibration acceleration sensor CA135 through charge amplifier, input as vibration signal; Rotor speed signal is through frequency multiplication model calling to another input end of dynamic signal analyzer, and the tach signal of access can carry out order tracking technique analysis.Dynamic signal analyzer carries out fft analysis to vibration signal, and follow the tracks of tach signal the vibration amplitude under this rotating speed is analyzed, by a port of switch, analytic signal is transferred to main frame, and carries out the display of FFT rumble spectrum and 1 ~ 5 order vibration tracking display; And 1 rank also can be vibrated the database that tracking signal is stored into data actuation through the port of switch by the interface software program of establishment by analytic signal, and realize the protection of vibration overload alarm by data actuation.
In order to ensure accuracy and the reliability of vibrating protection system operation of transfiniting, generally need to calibrate vibration measuring system.But existing calibration steps is generally laboratory investment, take off being used for the vibration acceleration sensor of Site Detection, charge amplifier and dynamic signal analyzer from scene, carry out calibration to connect in laboratory, namely on standard vibration machine, place standard vibration acceleration transducer and vibration acceleration sensor to be calibrated, and vibration acceleration sensor to be calibrated connects charge amplifier, dynamic signal analyzer and computing machine successively, to carry out laboratory investment.But existing laboratory investment cannot carry out testing, calibrating according to field environmental condition completely, and accuracy is limited, and complex operation.
Summary of the invention
The invention provides a kind of field calibration method for vibration signal order tracking technique, to solve the technical matters that existing engine vibration measuring system cannot carry out field calibration.
The technical solution used in the present invention is as follows:
For a field calibration method for vibration signal order tracking technique, comprising:
Arrange the first voltage signal generator and standard capacitance and generate vibration simulation signal for field calibration, wherein, the voltage signal that the first voltage signal generator exports is converted to vibration simulation signal through standard capacitance;
Second voltage signal generator is set as frequency of signal generator, generates the rotor speed simulating signal being used for field calibration;
Vibration simulation signal and rotor speed simulating signal all access on-the-spot vibration measuring system to carry out field calibration, wherein, vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene, and rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal.
Further, the first voltage signal generator and standard capacitance generate in vibration simulation signals step, and according to the response characteristic of the vibration acceleration sensor after laboratory investment, coupling arranges the first voltage signal generator and standard capacitance.
Further, the frequency values of the first voltage signal generator is determined according to the fundamental frequency of the secondary speed of engine.
Further, field calibration method of the present invention comprises:
Calibrate according to the FFT spectrogram of vibration simulation signal to on-the-spot vibration measuring system, and according to vibration signal order tracking technique analysis principle, add rotor speed simulating signal, the tachometer value of rotor speed simulating signal is just in time consistent with the frequency of vibration simulation signal divided by 60, according to the single order vibration amplitude that order tracking technique spectrogram is observed, regulate vibration simulation signal voltage size, the single order amplitude on order tracking technique spectrogram is calibrated according to the response characteristic of the vibration acceleration sensor of standard, when being transferred to vibration mark value, data actuation is reported to the police.
Further, field calibration method of the present invention comprises:
Dynamic signal analyzer receives vibration simulation signal through charge amplifier and adopts channel reception rotor speed simulating signal through number, and the rotating speed that the frequency of vibration simulation signal and the frequency of rotor speed simulating signal produce is consistent divided by the value of 60, whether the single order vibration amplitude observing order tracking technique is consistent with the vibration amplitude of fft analysis, namely whether meets following computing formula:
a＝2πfV
Wherein, a is vibration acceleration amplitude (m/s
2); F is vibration frequency (Hz); V is vibration velocity amplitude (m/s).
The present invention has following beneficial effect:
The present invention is by generating the vibration simulation signal and rotor speed simulating signal that are used for vibration measuring system field calibration; and vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene; rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal; can calibrate according to the connected mode of the p-wire of on-the-spot vibration measuring system, p-wire length, on-the-spot test environment completely; improve the accuracy of calibration, thus improve the reliability vibrating protection of transfiniting.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of existing vibration test system;
Fig. 2 is the field calibration method schematic flow sheet for vibration signal order tracking technique of the preferred embodiment of the present invention;
Fig. 3 is the calibration structure schematic diagram of the on-the-spot vibration measuring system of the preferred embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
With reference to Fig. 2 and Fig. 3, the preferred embodiments of the present invention provide a kind of field calibration method for vibration signal order tracking technique, and the present embodiment field calibration method comprises:
Step S10, arrange the first voltage signal generator and standard capacitance and generate vibration simulation signal for field calibration, wherein, the voltage signal that the first voltage signal generator exports is converted to vibration simulation signal through standard capacitance;
In the present embodiment, to on-the-spot vibration acceleration sensor be used for after laboratory is calibrated, according to its individual features, the vibration simulation signal generated the first voltage signal generator and standard capacitance carrys out the response characteristic of analog vibration acceleration transducer by the mode changing voltage, thus substitute the vibration signal that sends of vibration acceleration sensor to be calibrated at the scene, realize the inspection/calibration to whole vibration measuring system.
Step S20, arranges the second voltage signal generator as frequency of signal generator, generates the rotor speed simulating signal being used for field calibration;
Step S30, vibration simulation signal and rotor speed simulating signal all access on-the-spot vibration measuring system to carry out field calibration, wherein, vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene, and rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal.
The present embodiment is by generating the vibration simulation signal and rotor speed simulating signal that are used for vibration measuring system field calibration; and vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene; rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal; can calibrate according to the connected mode of the p-wire of on-the-spot vibration measuring system, p-wire length, on-the-spot test environment completely; improve the accuracy of calibration, thus improve the reliability vibrating protection of transfiniting.
As one preferably embodiment, the calibration of the vibration acceleration sensor for on-the-spot (to be calibrated) is carried out according to " vibration acceleration sensor vertification regulation ", as typical output characteristics (i.e. sensitivity) 20pc/g of CA135 acceleration transducer, the calibration of room obtains actual output characteristics by experiment.According to formula Q=UC
Wherein: Q---electricity, unit pc;
U---voltage, unit mV;
C---electric capacity, unit nf.
The output characteristics of analog acceleration, as long as have ac voltage signal generator and a standard capacitance just can realize, corresponding relation is as following table:
Note: in upper table, Ng is gas turbine rotating speed r/min;
NTL is free turbine rotating speed r/min.
The frequency values of analog vibration signal, is determined by 1 rank (fundamental frequency) frequency of gas turbine rotating speed (or free turbine rotating speed).
In the present embodiment, rotor speed simulating signal is produced by frequency of signal generator (i.e. the second voltage signal generator).The output characteristics of the corresponding gas turbine rotating speed of gas turbine speed probe is: the corresponding 51800r/min of 146.27Hz; The output characteristics of the corresponding free turbine rotating speed of free turbine speed probe is: the corresponding 43522r/min of 70Hz.
As one preferably embodiment, the present embodiment field calibration method comprises:
Calibrate according to the FFT spectrogram of vibration simulation signal to on-the-spot vibration measuring system, and according to vibration signal order tracking technique analysis principle, add rotor speed simulating signal, the tachometer value of rotor speed simulating signal is just in time consistent with the frequency of vibration simulation signal divided by 60, according to the single order vibration amplitude that order tracking technique spectrogram is observed, regulate vibration simulation signal voltage size, the single order amplitude on order tracking technique spectrogram is calibrated according to the response characteristic of the vibration acceleration sensor for scene, when being transferred to vibration mark value, data actuation is reported to the police.Preferably, in the present embodiment, the vibration of free turbine rotating speed 1 rank is no more than 16mm/s (rms); The vibration of gas turbine rotating speed 1 rank is no more than 30mm/s (rms).
Preferably, field calibration method of the present invention comprises:
Dynamic signal analyzer receives vibration simulation signal through charge amplifier and counts adopts channel reception rotor speed simulating signal, and the rotating speed that the frequency of vibration simulation signal and the frequency of rotor speed simulating signal produce is consistent divided by the value of 60, whether the single order vibration amplitude observing order tracking technique is consistent with the vibration amplitude of fft analysis, namely whether meets following computing formula:
a＝2πfV
Wherein, a is vibration acceleration amplitude (m/s
2); F is vibration frequency (Hz); V is vibration velocity amplitude (m/s).According to above-mentioned computing formula, can the vibration amplitude of vibration acceleration sensor be converted to speed vibration amplitude, thus realize the inspection to order tracking technique software, and be realized the inspection of vibration protection value by the oscillating component that order tracking technique is analyzed.
Can learn from above description; the present embodiment is by generating the vibration simulation signal and rotor speed simulating signal that are used for vibration measuring system field calibration; and vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene; rotor speed simulating signal is mated with the vibration frequency of vibration simulation signal; can calibrate according to the connected mode of the p-wire of on-the-spot vibration measuring system, p-wire length, on-the-spot test environment completely; improve the accuracy of calibration, thus improve the reliability vibrating protection of transfiniting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. for a field calibration method for vibration signal order tracking technique, it is characterized in that, comprising:
Arrange the first voltage signal generator and standard capacitance and generate vibration simulation signal for field calibration, wherein, the voltage signal that described first voltage signal generator exports is converted to described vibration simulation signal through described standard capacitance;
Second voltage signal generator is set as frequency of signal generator, generates the rotor speed simulating signal being used for field calibration;
Described vibration simulation signal and described rotor speed simulating signal all access on-the-spot vibration measuring system to carry out field calibration, wherein, described vibration simulation signal mates with the response characteristic of the vibration acceleration sensor for scene, and described rotor speed simulating signal is mated with the vibration frequency of described vibration simulation signal.
2. the field calibration method for vibration signal order tracking technique according to claim 1, is characterized in that,
Described first voltage signal generator and described standard capacitance generate in described vibration simulation signals step, and according to the response characteristic of the vibration acceleration sensor after laboratory investment, coupling arranges described first voltage signal generator and described standard capacitance.
3. the field calibration method for vibration signal order tracking technique according to claim 2, is characterized in that,
The frequency values of described first voltage signal generator is determined according to the fundamental frequency of the secondary speed of engine.
4. the field calibration method for vibration signal order tracking technique according to claim 1, is characterized in that, described field calibration method comprises:
Calibrate according to the FFT spectrogram of described vibration simulation signal to on-the-spot vibration measuring system, and according to vibration signal order tracking technique analysis principle, add described rotor speed simulating signal, the tachometer value of described rotor speed simulating signal is just in time consistent with the frequency of described vibration simulation signal divided by 60, according to the single order vibration amplitude that order tracking technique spectrogram is observed, regulate described vibration simulation signal voltage size, the single order amplitude on described order tracking technique spectrogram is calibrated according to the response characteristic of the vibration acceleration sensor of standard, when being transferred to vibration mark value, data actuation is reported to the police.
5. the field calibration method for vibration signal order tracking technique according to claim 4, is characterized in that, described field calibration method comprises:
Dynamic signal analyzer receives described vibration simulation signal through charge amplifier and adopts rotor speed simulating signal described in channel reception through number, and the rotating speed that the frequency of described vibration simulation signal and the frequency of described rotor speed simulating signal produce is consistent divided by the value of 60, whether the single order vibration amplitude observing order tracking technique is consistent with the vibration amplitude of fft analysis, namely whether meets following computing formula:
a＝2πfV
Wherein, a is vibration acceleration amplitude (m/s
2); F is vibration frequency (Hz); V is vibration velocity amplitude (m/s).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510705109.XA CN105222973B (en) | 2015-10-27 | 2015-10-27 | Field calibration method for vibration signal order tracking technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510705109.XA CN105222973B (en) | 2015-10-27 | 2015-10-27 | Field calibration method for vibration signal order tracking technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105222973A true CN105222973A (en) | 2016-01-06 |
| CN105222973B CN105222973B (en) | 2017-11-03 |
Family
ID=54992051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510705109.XA Active CN105222973B (en) | 2015-10-27 | 2015-10-27 | Field calibration method for vibration signal order tracking technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105222973B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106096500A (en) * | 2016-05-27 | 2016-11-09 | 大连楼兰科技股份有限公司 | Vehicle low speed collision signal frequency domain feature extracting method |
| CN107389337A (en) * | 2017-06-13 | 2017-11-24 | 中国航发湖南动力机械研究所 | Aeroengine rotor vibration test system |
| CN107792391A (en) * | 2016-08-30 | 2018-03-13 | 中国飞行试验研究院 | Helicopter torsional excitation test method based on FADEC control systems |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2062838U (en) * | 1990-01-05 | 1990-09-26 | 杭州轴承试验研究中心 | Scaling device for vibration measurer of speed-type bearings |
| CN103575933A (en) * | 2013-11-19 | 2014-02-12 | 浙江省计量科学研究院 | Vibration engine revolution speed gauge calibration device and method |
| EP2778609A1 (en) * | 2011-10-14 | 2014-09-17 | Innalabs Limited | Method for calibrating the scale factor of a hydraulic angular velocity sensor or axisymmetric vibratory gyroscope |
| CN104077474A (en) * | 2014-06-23 | 2014-10-01 | 华南理工大学 | Meshing frequency and spectrum correction technology based wind power gear box order tracking method |
| CN104459205A (en) * | 2014-12-08 | 2015-03-25 | 福建宁德核电有限公司 | Calibrating method and system of acceleration sensor |
-
2015
- 2015-10-27 CN CN201510705109.XA patent/CN105222973B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2062838U (en) * | 1990-01-05 | 1990-09-26 | 杭州轴承试验研究中心 | Scaling device for vibration measurer of speed-type bearings |
| EP2778609A1 (en) * | 2011-10-14 | 2014-09-17 | Innalabs Limited | Method for calibrating the scale factor of a hydraulic angular velocity sensor or axisymmetric vibratory gyroscope |
| CN103575933A (en) * | 2013-11-19 | 2014-02-12 | 浙江省计量科学研究院 | Vibration engine revolution speed gauge calibration device and method |
| CN104077474A (en) * | 2014-06-23 | 2014-10-01 | 华南理工大学 | Meshing frequency and spectrum correction technology based wind power gear box order tracking method |
| CN104459205A (en) * | 2014-12-08 | 2015-03-25 | 福建宁德核电有限公司 | Calibrating method and system of acceleration sensor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106096500A (en) * | 2016-05-27 | 2016-11-09 | 大连楼兰科技股份有限公司 | Vehicle low speed collision signal frequency domain feature extracting method |
| CN107792391A (en) * | 2016-08-30 | 2018-03-13 | 中国飞行试验研究院 | Helicopter torsional excitation test method based on FADEC control systems |
| CN107792391B (en) * | 2016-08-30 | 2020-12-29 | 中国飞行试验研究院 | Helicopter torsional vibration excitation test method based on FADEC control system |
| CN107389337A (en) * | 2017-06-13 | 2017-11-24 | 中国航发湖南动力机械研究所 | Aeroengine rotor vibration test system |
| CN107389337B (en) * | 2017-06-13 | 2019-09-20 | 中国航发湖南动力机械研究所 | Aeroengine rotor vibration test system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105222973B (en) | 2017-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| D’Alessandro et al. | Suitability of low‐cost three‐axis MEMS accelerometers in strong‐motion seismology: Tests on the LIS331DLH (iPhone) accelerometer | |
| CN104236893B (en) | Performance parameter test system and performance parameter test method of hydraulic damper | |
| CN204330124U (en) | Vibration detection device | |
| CN206772429U (en) | Noise source tests and analyzes device | |
| CN103175602A (en) | Modal testing system and modal testing method on basis of single-point laser continuous plane-scanning vibration measurement | |
| CN102538950A (en) | Acoustic testing method for inherent frequency of engine part | |
| CN101832813A (en) | Noise and Vibration-Measuring System based on virtual instrument technique | |
| CN105222973B (en) | Field calibration method for vibration signal order tracking technique | |
| Hua | Application of LabVIEW in the design of data acquisition and signal processing system of mechanical vibration | |
| CN201047798Y (en) | Virtual vibration table detecting apparatus | |
| CN102135444A (en) | Portable power mechanical-vibration measurement analyzer | |
| CN102680214B (en) | Vibration isolation performance test device and method for corrugated pipe | |
| CN106289496A (en) | A kind of method and device testing transformer noise | |
| CN205749240U (en) | A kind of macromolecular material internal flaw the cannot-harm-detection device | |
| CN103983403B (en) | Measure the apparatus and method of motor propeller system service behaviour and parameter | |
| CN205643073U (en) | Measurement device for fluid density | |
| CN108303465A (en) | A kind of fault detection method and system based on machine vibration | |
| CN106989880A (en) | Simulate ground seismic wave function lower member forces testing method and apparatus | |
| Herranen et al. | Acceleration data acquisition and processing system for structural health monitoring | |
| CN109470887A (en) | A kind of earthquake instrument system accelerometer Special testing device and method | |
| CN109342057A (en) | A kind of transmission parts test macro with high-speed data acquisition function | |
| CN202372253U (en) | Portable digital vibration platform | |
| CN1068679C (en) | Method and apparatus for certification of testing instrument for geophone | |
| CN209372128U (en) | Virtual instrument system based on multi-parameters test calibration | |
| CN102829941B (en) | A kind of automatic mode of vibrational system calibrating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |