CN107328463A - A kind of overhead transmission line contactless vibration measuring method at a distance - Google Patents
A kind of overhead transmission line contactless vibration measuring method at a distance Download PDFInfo
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- CN107328463A CN107328463A CN201710614226.4A CN201710614226A CN107328463A CN 107328463 A CN107328463 A CN 107328463A CN 201710614226 A CN201710614226 A CN 201710614226A CN 107328463 A CN107328463 A CN 107328463A
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- laser
- transmission line
- gun sight
- overhead transmission
- measuring method
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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 provides a kind of overhead transmission line contactless vibration measuring method at a distance.This method includes：Initial setting up, makes the laser beam of vialog parallel with gun sight sighted direction；Debugging process, the hot spot that the laser beam is produced is overlapped with the cross searching of the gun sight；Test process, the wire measured point that vibration detecting device alignment is pasted with into laser reflection material is tested.The present invention is determined using vibration measurement with laser method is contactless at a distance to overhead transmission line vibration progress, and its strong antijamming capability, signal accuracy are high, improve the accuracy of measurement result, reduce installation difficulty and cost.
Description
Technical field
The present invention relates to transmission line of electricity aeolian vibration technical field of measurement and test, in particular to a kind of overhead transmission line
With remote contactless vibration measuring method.
Background technology
At present, China's transmission line of electricity aeolian vibration monitoring is mainly realized by on-line equipment, is shaken although the device can be realized
The automatic monitor for continuously and data transfer of dynamic amplitude, but because its continued power is limited in one's ability, sensor is installed and moving operation
Complexity, virtual masseffect is notable, and Dynamic Signal quality is influenceed larger by manually installed factor, causes institute's frequency measurement spectral property not
It is enough true.
Meanwhile, although traditional accelerometer vibration measuring mode has signal accuracy preferably, the small advantage of additional mass, its
Live testing electromagnetic interference is big, and attached connecting line installs fixed complicated, is generally used for uncharged vibration measuring.
On the basis of technology and economic feasibility is considered, contactless offline survey can be carried out to transmission line of electricity
Shake.Vibration measurement with laser as a kind of brand-new contactless structure vibration measuring technology, with signal accuracy height, strong antijamming capability, can
Live monitoring, without virtual masseffect the advantages of.However, due to the important transmission line of electricity such as extra-high voltage, " three across " and Great span
Tower body design height is often larger, and ground wire does not have a background object of reference in the air, laser beam and light under daytime high light conditions
Spot poor visibility, directly observes by the naked eye the remote measuring point of progress and aims at and reflect very difficult with Laser Focusing.
China Patent Publication No.：CN 103308151A, disclose a kind of heterodyne laser vibration detecting device and method, belong to
How general technical field of electro-optical measurement, the vibratory laser for having moved to radio-frequency band using above-mentioned device acquisition frequency is
Strangle signal waveform；Vibratory laser Doppler signal Wave data sequence is gathered using Wave data acquisition system；In waveform acquisition
Sequence leading edge intercepts the waveform segment of a carrier cycle；Sine-Fitting is carried out to the waveform segment, the instantaneous of fitting sine wave is obtained
One sampled point of waveform segment translation gliding is carried out Sine-Fitting by frequency, and the instantaneous frequency for obtaining fitting sine wave is repeated
The slip fit procedure, until data sequence terminal.
Above-mentioned technical proposal, first, may not apply to this overhead transmission line；Secondly, it is impossible to be used in remote noncontact
Measurement；Third, signal that stability is preferable, intensity is higher etc. can not be maintained.
The content of the invention
In consideration of it, the present invention proposes a kind of overhead transmission line with remote contactless vibration measuring method, it is intended to solve
The problem of remote non-contacting vibration of existing overhead transmission line is tested.
The present invention proposes a kind of remote contactless vibration measuring method of overhead transmission line, carries out as follows：
A) initial setting up, regulation vibration detecting device makes the laser beam that vialog is sent parallel with gun sight sighted direction；
B) debugging process, the hot spot for adjusting the laser beam generation is overlapped with the cross searching of the gun sight；
C) reflecting material, laser reflection material of the stickup to reflect the laser beam in measured point are installed；
D) test process is directed at, the vibration detecting device is aligned with the measured point, tested.
Further, in above-mentioned object of reference selection subprocess, selection one is located to adjust suitable with the distance of measured point
The object of reference that the hot spot that the laser beam is produced is overlapped with the cross searching of the gun sight.
Further, in above-mentioned first alignment subprocess, the gun sight is directed at the object of reference, set by adjusting
Fine setting rotation on pointing instrumentation installing mechanism makes the hot spot that the laser beam is produced in the cross searching of the gun sight.
Further, in above-mentioned first alignment subprocess, if the laser facula is located at the cross searching of the gun sight,
Laser focal is finely tuned, reflected signal strength is reached requirement；If the laser facula deviates the cross searching of the gun sight, first
Laser spot position is adjusted by the vernier knob, then finely tuning laser focal makes reflected signal strength reach requirement.
Further, during above-mentioned installation reflecting material, the reflecting material is arranged on the measured point of wire, is set
The seam produced during reflecting material, which is located to set at wire top, reflecting material surface measured point position, receives the laser
Hot spot and the smooth reflectance coating that the laser signal received is reflexed to the vibration detecting device.
Further, in above-mentioned alignment test process, swashing for reflecting material reflection can be increased by adjusting laser focal
Light signal strength.
Further, in above-mentioned vibration measuring method, the vibration detecting device includes：Transmitting, reception and the survey of transfer laser signal
Vibration Meter；It is arranged on the pointing instrumentation installing mechanism on the vialog；And it is arranged on the aiming on the pointing instrumentation installing mechanism
Instrument.
Further, in above-mentioned vibration measuring method, the pointing instrumentation installing mechanism includes：It is arranged on the vialog upper surface
Neck；It is fixed on the neck, the bearing to install the pointing instrumentation；It is arranged on the bearing, for adjusting
State the vernier knob in pointing instrumentation direction.
Further, in above-mentioned vibration measuring dress method, the vernier knob includes horizontal direction vernier knob and vertical direction
Vernier knob.
Further, in above-mentioned vibration measuring method, the vialog is conventional laser Doppler vibrometer.
Further, in above-mentioned vibration measuring method, required instrument also includes, and is connected to analytic signal on vibration measurement with laser device
Demodulation analysis instrument.
The beneficial effects of the present invention are of the invention by long distance laser multichannel spectrometer and optics high definition compared with prior art
Cross hair mirror is combined, and when that can launch laser beam, measured point is aimed at, and realizes and overhead transmission line is vibrated
Hot spot being accurately positioned and focusing under the remote of measured point, high light conditions.
Further, the present invention can strengthen overhead transmission line vibration by pasting laser reflection material in measured point
The laser reflection signal intensity of measured point, improves positioning and the accuracy aimed at.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is a kind of overhead transmission line provided in an embodiment of the present invention contactless vibration measuring method testing at a distance
Schematic diagram；
Fig. 2 is used in remote contactless vibration measuring method for a kind of overhead transmission line provided in an embodiment of the present invention, is taken aim at
Standard apparatus structural representation；
Fig. 3 is a kind of overhead transmission line provided in an embodiment of the present invention contactless vibration measuring method flow at a distance
Figure.
Fig. 4 is used in remote contactless vibration measuring method for a kind of overhead transmission line provided in an embodiment of the present invention, is surveyed
Try phase sub-conductor end measuring point vibration displacement timeamplitude map on the right of circuit；
Fig. 5 is used in remote contactless vibration measuring method for a kind of overhead transmission line provided in an embodiment of the present invention, is surveyed
Try phase sub-conductor end measuring point vibration displacement power spectral density plot figure on the right of circuit；
Fig. 6 is used in remote contactless vibration measuring method for a kind of overhead transmission line provided in an embodiment of the present invention, is surveyed
Try line grounding wire end measuring point vibration displacement timeamplitude map；
Fig. 7 is used in remote contactless vibration measuring method for a kind of overhead transmission line provided in an embodiment of the present invention, is surveyed
Try line grounding wire end measuring point vibration displacement power spectral density plot figure.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in fig.1, it is the fundamental diagram using the test of the inventive method row.
Aim at, transmitting, receive and the vibration detecting device 1 of transfer laser signal sends laser beam and is irradiated to and is arranged on wire
It is used on measured point on the reflecting material 2 of reflected signal, by the reflection of reflecting material 2, is received by vibration detecting device 1, and transmit
Parsed to the demodulation analysis device 3 for being connected to analytic signal on vibration detecting device.
As shown in fig.2, its vibration detecting device 1 for the present invention, the vialog 101 of transmitting, reception and transfer laser signal；
It is arranged on the pointing instrumentation installing mechanism on the vialog 101；And be arranged on the installing mechanism of pointing instrumentation 102, and lead to
Cross and adjust the laser beam formation hot spot that its cross searching and the vialog 101 send and overlap, to aim at the aiming of measured point
Instrument 102；It is arranged on the neck 103 of the upper surface of Doppler vibrometer 101；It is fixed on the neck 103, to install
State the bearing 104 of pointing instrumentation 102；It is provided with to adjust the direction in the direction of the pointing instrumentation 102 on described bearing 104
Finely tune knob 105.
Specifically, vialog 101 is conventional laser Doppler vibrometer in the present embodiment, and it can launch stabilization
The laser beam of frequency, and the laser beam reception that can reflect emissive material, are transmitted into demodulation analysis instrument.This area skill
Art personnel, and can be by emissive material it is understood that vialog 101 need to disclosure satisfy that the laser beam of the stable frequency of transmitting
The laser beam of reflection is received, and meanwhile, it is capable to is connected, is fixed with the optical sight 102 and convenient calibration.
Specifically, gun sight 102 is optical sight in the present embodiment, and it can easily be arranged on bearing 104
On, and measured point is focused, aimed at.It will be appreciated by persons skilled in the art that gun sight 102 only needs to disclosure satisfy that
Focusing, aiming to measured point, and be easy to be fixed on bearing 104.
Specifically, neck 103 in the present embodiment, for be opened on Doppler vibrometer the groove of 101 upper surfaces or
Person 101 upper surfaces on Doppler vibrometer set a clamp, groove are set on the surface of clamp, to hold-down support 104.This
Art personnel are it is understood that neck 103 need to be met can be easy to be fixed on 101 on vialog, and connect branch
Seat 104.
Specifically, in the present embodiment, for the two supporting legs being arranged on neck 103, its top is connected bearing 104
Connect, for setting gun sight 102 and directional trim button 105.It will be appreciated by persons skilled in the art that 104 need of bearing
Satisfaction can be easy to be fixed on neck 103, and set gun sight 102.
Specifically, directional trim button 105 in the present embodiment, is arranged on bearing 104, for adjusting gun sight
102 direction.It will be appreciated by persons skilled in the art that the directional trim button 105 on bearing 104 is used for adjusting gun sight
102 horizontally and vertically.
Refering to shown in 3, it is the flow chart tested using the inventive method.
Step S1, initial setting up adjusts vibration detecting device, the laser beam that vialog is sent is put down with gun sight sighted direction
OK；
Specifically, optical sight 102 is installed on the bearing 104 for being arranged on laser doppler vibrometer 101,
On laser doppler vibrometer 101 upper surface is fixed in by neck 103；Directional trim on adjustment bearing 104 is pressed
Button 105, makes the laser beam of laser doppler vibrometer 101 parallel with the sighted direction of gun sight 102.By laser-Doppler vibration measuring
The laser beam transmitting of instrument 101, while adjustment direction trim button 105, the aiming side of range estimation laser beam and gun sight 102
To until laser beam is parallel with the sighted direction of gun sight 102.It will be appreciated by persons skilled in the art that by using
101 and optical sight 102 in different model, the laser doppler vibrometer of specification, in debugging process, the time length of debugging
Difference, complexity is different；By setting direction trim button 105, the sighted direction of laser beam and gun sight 102 is adjusted
It is parallel；It is that cross coincidence process is prepared by the process.
Step S2, initial debugging process, the cross searching weight of the hot spot that the laser beam is produced and the gun sight
Close；
Specifically, in place's selection one object of reference of selection suitable with measured point distance, laser doppler vibrometer 101 is passed through
Transmitting laser beam carry out spot location.While slowly adjusting the directional trim button 105 on bearing 104, optics is observed
The eyepiece of gun sight 102 is until laser doppler vibrometer 101 launches the hot spot and optical sight 102 of laser beam formation
Cross searching is overlapped.It will be appreciated by persons skilled in the art that the selection of object of reference can be according to the concrete condition of measured point
Selection, and when carrying out spot location using the transmitting laser beam of laser doppler vibrometer 101, it should it is first that laser is more
The general laser beam for strangling the transmitting of vialog 101 is irradiated on object of reference, and the directional trim button on bearing 104 is then adjusted again
105 rotate optical sight 102, laser doppler vibrometer 101 is launched the hot spot and optics of laser beam formation
The cross searching of gun sight 102 is overlapped；It is that test process is prepared by the process.
Step S3, installs reflecting material process, the laser to reflect the laser beam is pasted in ground wire measured point
Reflecting material；
Specifically, by being provided for swashing for the transmitting of reflection laser Doppler vibrometer 101 on ground wire measured point
The reflecting material 2 of light light beam, the seam of reflecting material 2 should try one's best positioned at ground wire top, and ensure that in reflecting material
The surface measured position of material 2 forms one layer of smooth reflectance coating.It will be appreciated by persons skilled in the art that in ground wire
The purpose that measured point is provided for the reflecting material 2 of the laser beam of the transmitting of reflection laser Doppler vibrometer 101 is to strengthen
Reflected signal；The seaming requirements of reflecting material 2 be located at ground wire top be in order to ensure laser doppler vibrometer 101 launch
The complete reflected signal strength of hot spot of laser beam formation is consistent；The smooth reflectance coating of the surface Smooth of reflecting material 2 can enter
One step strengthens reflected signal.Pass through the process, it is possible to increase the accuracy of measurement result.
Step S4, test process, the measured point that laser-targeting device alignment is pasted with into laser reflection material is tested.
Specifically, laser-targeting device 1 is aligned according to above-mentioned steps S2, focused on the measured point of step S3 settings
It is measured, the laser beam that measured point reflectorized material reflects is received by laser-targeting device 1 and demodulation analysis instrument 3 is passed to
Parsed.It will be appreciated by persons skilled in the art that many equipment can be set in test process simultaneously to a quilt
Measuring point is measured or multiple measured points is tested, and test result accuracy is higher.
Shown in Figure 4, it is phase sub-conductor end measuring point vibration displacement timeamplitude map on the right of institute's survey line road of the present invention.
It can be drawn from figure, phase sub-conductor end measuring point displacement signal quality preferably, can be true on the right of the circuit measured based on the present invention
Reflect random change of the measured point displacement with the time.
Shown in Figure 5, it is phase sub-conductor end measuring point vibration displacement power spectral density on the right of institute's survey line road of the present invention
Curve map.It can be drawn from figure, phase sub-conductor end measuring point mainly shows many in the range of 0-15Hz on the right of institute's measurement circuit
Frequency vibration feature, meets large-span conductors aeolian vibration characteristic.
Shown in Figure 6, it is institute's survey line road of the present invention ground wire end measuring point vibration displacement timeamplitude map.Can from figure
Draw, the line grounding wire end measuring point vibration displacement signal quality measured based on the present invention is preferable, can truly reflect measured point
Displacement with the time random change.
Shown in Figure 7, it is institute's survey line road of the present invention ground wire end measuring point vibration displacement power spectral density plot figure.From
It can be drawn in figure, institute's geodetic thread end measuring point mainly shows the multifrequency vibration performance in the range of 0-20Hz, with meeting Great span
Line aeolian vibration characteristic.
In summary, the contactless vibration measuring method antijamming capability at a distance of the overhead transmission line in the present embodiment
By force, signal intensity is high, realizes and the accurate of hot spot under overhead transmission line vibration the remote of measured point, high light conditions is determined
Position and focusing, measurement result are accurate, and utilization this method reduce equipment installation difficulty and cost.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of overhead transmission line contactless vibration measuring method at a distance, it is characterised in that methods described includes following step
Suddenly：
Initial setting up, makes the laser beam that vialog is sent in vibration detecting device parallel with gun sight sighted direction；
Debugging process, the hot spot that the laser beam is produced is overlapped with the cross searching of the gun sight；
Test process, the gun sight is aligned with the measured point, tested, and the measured point is pasted with to reflect institute
State the laser reflection material of laser beam.
2. the remote contactless vibration measuring method of overhead transmission line according to claim 1, it is characterised in that above-mentioned
In initial set-up procedure, the gun sight by be arranged on the gun sight installing mechanism of the vialog upper surface be arranged on it is described
On vialog.
3. overhead transmission line according to claim 1 or 2 contactless vibration measuring method at a distance, it is characterised in that
Above-mentioned debugging process includes：
Object of reference selects subprocess, and selection one is located to adjust the light that the laser beam is produced suitable with the distance of measured point
The object of reference that spot is overlapped with the cross searching of the gun sight；
First alignment subprocess, is directed at the object of reference by the gun sight, the gun sight fitting machine is arranged on by adjustment
The hot spot that vernier knob on structure produces the laser beam is located at the cross searching of the gun sight.
4. overhead transmission line according to claim 3 contactless vibration measuring method at a distance, it is characterised in that upper
State in the first alignment subprocess, if the laser facula is located at the cross searching of the gun sight, finely tunes laser focal, make reflection
Signal intensity reaches requirement；If the laser facula deviates the cross searching of the gun sight, first pass through the vernier knob and adjust
Whole laser spot position, then adjusting laser focal makes reflected signal strength reach requirement.
5. overhead transmission line according to claim 4 contactless vibration measuring method at a distance, it is characterised in that described
The seam of reflecting material is located at wire top, and reflecting material surface measured point position, which is provided with, receives and reflect the laser
The smooth reflectance coating of spot signal.
6. overhead transmission line according to claim 5 contactless vibration measuring method at a distance, it is characterised in that upper
Alignment test process is stated, reflected signal strength is increased by adjusting laser focal.
7. overhead transmission line according to claim 6 contactless vibration measuring method at a distance, it is characterised in that upper
State in test process, if the laser facula is located at the cross searching of the gun sight, finely tunes laser focal, make reflected signal strong
Degree reaches requirement；If the laser facula deviates the cross searching of the gun sight, the trim button fine setting laser is first passed through
Facula position, then adjusting laser focal makes reflected signal strength reach requirement.
8. overhead transmission line according to claim 7 contactless vibration measuring method at a distance, it is characterised in that described
Vibration detecting device includes：
The vialog (101) of transmitting, reception and transfer laser signal；
It is arranged on the pointing instrumentation installing mechanism on the Doppler vibrometer (101)；
And be arranged on the pointing instrumentation (102) installing mechanism, and by adjusting its cross searching and the vialog (101)
The hot spot of the laser beam sent is overlapped, to aim at the pointing instrumentation (102) of measured point.
9. overhead transmission line according to claim 8 contactless vibration measuring method at a distance, it is characterised in that described
Pointing instrumentation installing mechanism includes：
It is arranged on the neck (103) of the vialog (101) upper surface；
It is fixed on the neck (103), the bearing (104) to install the pointing instrumentation (102)；
It is provided with to adjust the directional trim knob in the direction of the pointing instrumentation (102) on described bearing (104)
(105)。
10. overhead transmission line according to claim 9 contactless vibration measuring method at a distance, it is characterised in that institute
Stating the equipment of test process use also includes, and is connected on the vibration detecting device (1) and is received to parse the vibration detecting device (1)
The demodulation analysis instrument (3) of the reflected signal arrived.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614226.4A CN107328463A (en) | 2017-07-25 | 2017-07-25 | A kind of overhead transmission line contactless vibration measuring method at a distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614226.4A CN107328463A (en) | 2017-07-25 | 2017-07-25 | A kind of overhead transmission line contactless vibration measuring method at a distance |
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| Publication Number | Publication Date |
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ID=60227649
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| CN105675115A (en) * | 2016-01-18 | 2016-06-15 | 佛山科学技术学院 | Laser Doppler online vibration testing system and method |
| CN205920572U (en) * | 2016-07-06 | 2017-02-01 | 上海倍肯机电科技有限公司 | Early warning system is prevented destroying by power transmission line based on multi -sensor fusion technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201803723U (en) * | 2010-08-31 | 2011-04-20 | 成都国铁精工科技有限责任公司 | Two-dimensional laser alignment detection device |
| CN102360059A (en) * | 2011-09-23 | 2012-02-22 | 上海市电力公司 | Power transmission and distribution line partial discharge fault on-line detection method and apparatus thereof |
| US20150043007A1 (en) * | 2012-03-01 | 2015-02-12 | Leica Geosystems Ag | Method for determining a change in distance by means of interferometry |
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Application publication date: 20171107 |