CN105675115A - Laser Doppler online vibration testing system and method - Google Patents
Laser Doppler online vibration testing system and method Download PDFInfo
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- CN105675115A CN105675115A CN201610032741.7A CN201610032741A CN105675115A CN 105675115 A CN105675115 A CN 105675115A CN 201610032741 A CN201610032741 A CN 201610032741A CN 105675115 A CN105675115 A CN 105675115A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to a laser Doppler online vibration testing system and method. The system comprises a laser dynamic vibration testing unit, an auxiliary vibration testing probe, a vibration isolated detection station and a workpiece output/input mechanism. The optimal test position can be adjusted to automatically according to vibration noise characteristics of each product, whether the tested product is qualified can be detected, determined and distinguished in real time, the system and method can be directly applied to detecting products in a production line, and a Doppler laser vibration test technology can be popularized and applied to scaled production sites.
Description
Technical field
The present invention relates to a kind of online vibration measuring system and method, specifically, relate to the online vibration measuring of a kind of laser-DopplerSystem and method.
Background technology
Digitalized laser vibration measuring technology based on Doppler effect, is widely used in electromechanics, power set vibration characteristicsThe collection of non-contact testing and stress-strain data thereof, collection of illustrative plates and comparison, analysis, comprise engine, automobile, vehicle, household electricQuality testing, the assessment of research, design experiment and manufactured goods that the electrical category products such as device are relevant to vibration.
Existing portable laser doppler vialog, integrated advanced optical measuring technique and Digital Signal Processing,Not only measurement is quick, accuracy is high, and storage, the processing capacity of collection of illustrative plates and data are complete, and complete machine is lightweight, carry and useConvenient, under applicable unit experimental situation, to being tested individually by test agent, exemplar, carry out dividing of vibration characteristics for grinding examination personnelAnalyse, contrast and judgement provides and detects accurately data.
But aspect product vibration measuring, the vibration of production line bulk article, noise measuring are not only with certain rhythmThe continuous process constantly repeating, and require checkout equipment for the feature of making an uproar of shaking of every product, automatically to adjust best testPosition, whether the detected product of detection in real time, judgement and differentiation is qualified, due to not tool of existing common laser doppler vialogStandby product detects desired repertoire, is difficult to be directly used in the product detection of production line, has restricted laser dopplerVibration measuring technology is applied large-scale production scene.
Summary of the invention
The present invention has overcome shortcoming of the prior art, and the online vibration measuring system of a kind of laser-Doppler and method are provided,Can not only under production environment, carry out fast and accurately unit detection with cordless, can also Automatic Optimal test point, sentenceDetermine, record and process substandard product, realizing full-automatic vibration measuring online.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The online vibration measuring system of a kind of laser-Doppler, comprises that dynamic Laser vibration measuring unit, auxiliary vibration measuring probe, vibration isolation detectStation and workpiece discrepancy executing agency.
Further, described dynamic Laser vibration measuring unit comprises accessory and the core component that dynamic Laser is measured, and it is auxiliaryHelp parts that the sextuple kinetic measurement module of SPEED VISION is set, the sextuple kinetic measurement module of described SPEED VISION comprises three face battle arraysCcd image pick-up transducers, core component arranges three Doppler's kinetic measurement laser heads, and an Array CCD collection passesSensor and Doppler's kinetic measurement laser head combination, each combination is positioned over three phases that just described vibration isolation detected stationOn the station of vertical plane.
Further, described auxiliary vibration measuring probe comprises acceleration transducer, and core component also comprises accurate measurement core component, instituteState accurate measurement core component and also comprise the deflection pointing device for adjusting Doppler's kinetic measurement laser head.
Further, but described vibration isolation detects station comprises Workpiece carrier platform, elastic damping member and the inertia member that shakes, instituteState the bottom that elastic damping member is arranged at described Workpiece carrier platform.
Further, but described inertia shakes, member is the mass that described Workpiece carrier platform bottom is set, described massWeight is at least 20-30 times of its surface bears workpiece weight.
Further, the described workpiece executing agency of coming in and going out comprises that the shunting outside isolation transfer device and the station in station transfersDevice.
Further, described vibration isolation detects the image that workpiece code identification probe, industrial CCD vision-based detection are also set in stationAcquisition probe, testing result printing head.
A kind of online vibration measuring method of laser-Doppler, when measured workpiece with streamline enter vibration isolation detect station front, byIsolation transfer device is sent into vibration isolation and is detected after station, the sextuple measurement mode of the SPEED VISION of the accessory of dynamic Laser vibration measuring unitPiece carries out quick bigness scale to the sextuple dynamic characteristics of a large amount of somes position on workpiece, according to the distribution of each some position bigness scale data with thanRight, the accurate measurement elements of a fix that calculate, extract some key positions send the host computer of controlling deflection pointing device to, by host computerDoppler's kinetic measurement laser head of control core assembly aims at key measurement point and carries out high-acruracy survey; Dynamic Laser vibration measuring listThe high frequency motion data that the master control PC of unit records core component, the low frequency movement data that accessory records are carried out General OfficeReason, and contrasts with preset qualified criterion, judge product shake make an uproar whether qualified and drive executing agency to certified products, do not conform toLattice product mark or shunt handover.
Further, also comprise that the information data that laser head vibration acceleration sensor is detected carries out software vector meterCalculate, eliminate the interference of laser head self vibration for measured workpiece vibration information.
Further, be also included on the body of substandard product and directly print defective item data, it prints vestige canWipe.
Compared with prior art, the invention has the beneficial effects as follows:
The online vibration measuring system of a kind of laser-Doppler of the present invention and method, can be for the feature of making an uproar of shaking of every product,The best test position of automatic adjustment, whether detection in real time, judgement and differentiation are detected product qualified, can be directly used in production flowing waterThe product of line detects, and makes laser doppler vibration measuring technology in large-scale production field popularization application.
Brief description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, together with embodiments of the present invention for explaining the present invention,Be not construed as limiting the invention, in the accompanying drawings:
Fig. 1 is the online vibration measuring flow chart of the online vibration measuring system of a kind of laser-Doppler of the present invention;
Fig. 2 is the online vibration measuring system block diagram of the online vibration measuring system of a kind of laser-Doppler of the present invention;
Fig. 3 is the online layout of the online vibration measuring system of a kind of laser-Doppler of the present invention;
Fig. 4 is dynamic Laser vibration measuring cell schematics;
Fig. 5 is the structural representation of vibration isolation station.
In figure, 1---Doppler's kinetic measurement laser head; 2---acceleration transducer;
3---isolation spring; 4---isolation transfer device;
5---control cabinet; 6---data collecting card;
7---master control PC; 8---mass;
9---workpiece code identification probe; 10---vibration isolator;
11---tested outdoor machine of air-conditioner; 12---deflection pointing device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred reality described hereinExecute example only for description and interpretation the present invention, be not intended to limit the present invention.
As shown in Fig. 1 to 5, the online vibration measuring system of a kind of laser-Doppler of the present invention, comprises dynamic Laser vibration measuring listUnit, auxiliary vibration measuring probe, vibration isolation detect station, workpiece discrepancy executing agency.
Dynamic Laser vibration measuring unit comprises accessory and the core component that dynamic Laser is measured, and its accessory arranges heightThe sextuple kinetic measurement module of speed vision, core component arrange Doppler's kinetic measurement laser head 1, channeling, multiple spot, multibandAutomatic Optimal detection system; The acceleration transducer 2 of auxiliary vibration measuring probe, for detection of laser head self vibration information, schoolThe interference of just self shaking to testing result; Vibration isolation detects station and comprises station components and the elastic damping structures thereof such as Workpiece carrier platformThe member but part, inertia shake, shielding and the impact of blocking-up production scene vibration source on vibration measuring inspection, elastic damping member adopts vibration isolation bulletSpring 3; Workpiece discrepancy executing agency comprises the shunting transfer device outside isolation transfer device 4 and the station in station, core componentAlso comprise accurate measurement core component, accurate measurement core component also comprises that the deflection for adjusting Doppler's kinetic measurement laser head 1 aims atMechanism 12.
Dynamic Laser vibration measuring unit also connects control cabinet 5, data collecting card for data acquisition and storage system successively6, master control PC 7 and analysis software thereof etc.
But the present embodiment is at least its surface bears workpiece detecting shake mass 8 weight of member of station set inertia20-30 times of weight.
Vibration isolation detect image acquisition probe that workpiece code identification probe 9, industrial CCD vision-based detection are also set in station,Testing result printing head.
The present invention also provides a kind of online vibration measuring method: when measured workpiece with streamline enter vibration isolation detect station front,Send into vibration isolation by isolation transfer device 4 and detect after station, the SPEED VISION of dynamic Laser vibration measuring unit accessory is sextuple to be measuredModule is carried out quick bigness scale to the sextuple dynamic characteristics of a large amount of somes position on workpiece, according to the distribution of each some position bigness scale data with thanRight, calculate the crucial measuring position, the formation accurate measurement elements of a fix that extract several optimizations, by master control PC control core groupThe deflection pointing device 12 of part guides Doppler's kinetic measurement laser head 1 to aim at crucial measuring position to carry out high-acruracy survey. SwashHigh frequency motion data, the accessory that the master control PC 7 of photokinesis vibration measuring unit records core component record low frequency fortuneMoving data are carried out integrated treatment, and contrast with preset qualified criterion, judge product shake make an uproar whether qualified and drive and carry outMechanism marks or shunts handover to certified products, defective work.
The data processing of online vibration measuring method also comprises the information data that laser head vibration acceleration sensor 2 is detectedCarry out the calculating of software vector, eliminate the interference of laser head self vibration for measured workpiece vibration information.
On the detection of online vibration measuring system, the body that processing method is also included in substandard product, directly print nonconformanceOrder data, it is erasable that it prints vestige.
The online vibration measuring system figure of Fig. 3 to 5 outdoor machine of air-conditioner, Fig. 3 is that outdoor machine of air-conditioner enters vibration isolation detection station, dynamic LaserVibration measuring unit detects outdoor machine of air-conditioner, and Fig. 4 is that dynamic Laser vibration measuring unit connects LDV control cabinet 5, and LDV controller connectsData collecting card 6, data collecting card 6 connects master control PC 7, and the data that dynamic Laser vibration measuring unit is obtained are by master control PC 7Show.
As shown in Figure 5, outdoor machine of air-conditioner is placed on Workpiece carrier platform, and workpiece code identification probe 9 is arranged on outside air-conditioningMachine top, Workpiece carrier platform upper surface is laid vibration isolator 10, is arranged on the Doppler's kinetic measurement on deflection pointing device 12Laser head 1, acceleration transducer 2 just arrange tested outdoor machine of air-conditioner 11, and Workpiece carrier platform bottom arranges mass 8, qualityIsolation spring 3 is set between piece 8 and ground, is transported to subsequent processing by isolation transfer device 4.
Finally it should be noted that: these are only the preferred embodiments of the present invention, be not limited to the present invention, althoughWith reference to embodiment, the present invention is had been described in detail, for a person skilled in the art, it still can be to aforementionedThe technical scheme that each embodiment records is modified, or part technical characterictic is wherein equal to replacement, but allWithin the spirit and principles in the present invention, any amendment of doing, be equal to replacement, improvement etc., all should be included in protection of the present inventionWithin scope.
Claims (10)
1. the online vibration measuring system of laser-Doppler, is characterized in that, comprises dynamic Laser vibration measuring unit, auxiliary vibration measuring spyHead, vibration isolation detect station and workpiece discrepancy executing agency.
2. the online vibration measuring system of a kind of laser-Doppler according to claim 1, is characterized in that described dynamic Laser vibration measuringUnit comprises accessory and the core component that dynamic Laser is measured, and its accessory arranges the sextuple kinetic measurement mould of SPEED VISIONPiece, the sextuple kinetic measurement module of described SPEED VISION comprises three Array CCD pick-up transducers, core component arranges threeDoppler's kinetic measurement laser head, an Array CCD pick-up transducers and Doppler's kinetic measurement laser head combination,Each combination is just positioned over described vibration isolation is detected on the station of three perpendicular planes of station.
3. the online vibration measuring system of a kind of laser-Doppler according to claim 2, is characterized in that, described auxiliary vibration measuring probeComprise acceleration transducer, core component also comprises accurate measurement core component, and described accurate measurement core component also comprises for adjusting manyThe general deflection pointing device of strangling kinetic measurement laser head.
4. the online vibration measuring system of a kind of laser-Doppler according to claim 1, is characterized in that, described vibration isolation detects stationBut comprise Workpiece carrier platform, elastic damping member and the inertia member that shakes, described elastic damping member is arranged at described workpiece and holdsThe bottom of carrying platform.
5. the online vibration measuring system of a kind of laser-Doppler according to claim 4, is characterized in that the member but described inertia shakesFor the mass of described Workpiece carrier platform bottom is set, described mass weight is at least its surface bears workpiece weight20-30 times.
6. the online vibration measuring system of a kind of laser-Doppler according to claim 1, is characterized in that, described workpiece is come in and gone out and carried outMechanism comprises the shunting transfer device outside isolation transfer device and the station in station.
7. the online vibration measuring system of a kind of laser-Doppler according to claim 1, is characterized in that, described vibration isolation detects stationImage acquisition probe, the testing result printing head of workpiece code identification probe, industrial CCD vision-based detection are inside also set.
8. the online vibration measuring method of laser-Doppler, is characterized in that, detects work when measured workpiece enters vibration isolation with streamlineFront, position, send into vibration isolation by isolation transfer device and detect after station, the SPEED VISION of the accessory of dynamic Laser vibration measuring unitSextuple measurement module carries out quick bigness scale to the sextuple dynamic characteristics of a large amount of somes position on workpiece, according to each some position bigness scale dataDistribute and compare, the accurate measurement elements of a fix that calculate, extract some key positions send the host computer of controlling deflection pointing device to,Aim at key measurement point by Doppler's kinetic measurement laser head of PC control core component and carry out high-acruracy survey; Laser is movingThe high frequency motion data that the master control PC of state vibration measuring unit records core component, the low frequency movement data that accessory records are carried outIntegrated treatment, and contrasting with preset qualified criterion, judge product shake make an uproar whether qualified and drive executing agency to qualifiedProduct, defective work mark or shunt handover.
9. a kind of online vibration measuring method of laser-Doppler according to claim 8, is characterized in that, also comprises laser head is shakenThe information data that moving acceleration transducer detects is carried out the calculating of software vector, eliminates laser head self and vibrates for measured workpieceThe interference of vibration information.
10. a kind of online vibration measuring method of laser-Doppler according to claim 8, is characterized in that, is also included in defectiveOn the body of product, directly print defective item data, it is erasable that it prints vestige.
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| CN201610032741.7A CN105675115B (en) | 2016-01-18 | 2016-01-18 | A kind of online vibration measuring system of laser-Doppler and method |
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Cited By (6)
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| CN105953909A (en) * | 2016-06-28 | 2016-09-21 | 佛山科学技术学院 | Home appliance vibration automatic detection system and method based on laser displacement sensors |
| CN107328463A (en) * | 2017-07-25 | 2017-11-07 | 中国电力科学研究院 | A kind of overhead transmission line contactless vibration measuring method at a distance |
| CN110865158A (en) * | 2019-12-10 | 2020-03-06 | 浙江大学 | Nondestructive testing device and method for internal quality of fruit |
| CN111637999A (en) * | 2020-04-23 | 2020-09-08 | 浙江恒澜科技有限公司 | Chemical fiber filament tension online detection method and device based on laser vibration measurement |
| CN111637960A (en) * | 2020-04-26 | 2020-09-08 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN113657426A (en) * | 2021-06-28 | 2021-11-16 | 国网江苏省电力有限公司电力科学研究院 | Heating-vibration combined detection method, device and system for GIL electric contact state |
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Cited By (9)
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| CN105953909A (en) * | 2016-06-28 | 2016-09-21 | 佛山科学技术学院 | Home appliance vibration automatic detection system and method based on laser displacement sensors |
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| CN110865158A (en) * | 2019-12-10 | 2020-03-06 | 浙江大学 | Nondestructive testing device and method for internal quality of fruit |
| CN110865158B (en) * | 2019-12-10 | 2023-08-18 | 浙江大学 | Nondestructive testing device and method for internal quality of fruits |
| CN111637999A (en) * | 2020-04-23 | 2020-09-08 | 浙江恒澜科技有限公司 | Chemical fiber filament tension online detection method and device based on laser vibration measurement |
| CN111637999B (en) * | 2020-04-23 | 2021-08-24 | 浙江恒澜科技有限公司 | Chemical fiber filament tension online detection method and device based on laser vibration measurement |
| CN111637960A (en) * | 2020-04-26 | 2020-09-08 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN111637960B (en) * | 2020-04-26 | 2021-08-27 | 河海大学 | Vibration measuring system for eliminating vibration influence of base point of laser vibration meter |
| CN113657426A (en) * | 2021-06-28 | 2021-11-16 | 国网江苏省电力有限公司电力科学研究院 | Heating-vibration combined detection method, device and system for GIL electric contact state |
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