CN107014297A - A kind of contactless real-time time sequence chart frame vision measurement device of wire and method - Google Patents
A kind of contactless real-time time sequence chart frame vision measurement device of wire and method Download PDFInfo
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- CN107014297A CN107014297A CN201710289982.4A CN201710289982A CN107014297A CN 107014297 A CN107014297 A CN 107014297A CN 201710289982 A CN201710289982 A CN 201710289982A CN 107014297 A CN107014297 A CN 107014297A
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- transmission line
- power transmission
- image
- wire
- sequence chart
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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- Force Measurement Appropriate To Specific Purposes (AREA)
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Abstract
The invention discloses a kind of contactless real-time time sequence chart frame vision measurement device of wire and method, device includes power transmission line, conductor spacer, image mechanism, data processing module, wireless signal transmitting module；Conductor spacer is fixedly installed between power transmission line, for limiting the relative motion between power transmission line；Image mechanism is fixed on conductor spacer, for shooting microspur video image；Data processing module is handled the microspur video image that image mechanism is shot, and result is sent into ground monitoring center by wireless signal transmitting module.The present invention is assessed and calculated in real time the Shape Coefficient and wind load and wire angular separation degree of power transmission line to the state of wind load first, wind load is calculated using the calculation formula of wind load, then model analysis is carried out to transmission line of electricity, complete the power transmission line under wind load and gravity laod effect and look for shape, the distribution of wire upper stress is obtained using image algorithm, finally it is compared with stress critical value, sets up early warning mechanism.
Description
Technical field
The invention belongs to transmission pressure monitoring technical field, and in particular to a kind of contactless real-time time sequence chart of wire
Frame vision measurement device and method.
Background technology
The external loads that power transmission tower frame is subject to include wind load, earthquake load, snow load and ice load etc..Absolutely mostly
Wind load is its control load in the case of number, and the influence of other loads is relatively small.In recent years, power transmission tower is due to design strength
Report that is not enough and being scraped by strong wind is of common occurrence.The reason for Transmission Tower-line System is destroyed removes Material texture, metal quality, construction
Exist in terms of quality outside problem, the understanding of dynamic performance of the designer to Transmission Tower-line System under wind action
Also Shortcomings.
At present, mainly by installing the stress variation at pulling force sensor, measurement tested point position on transmission line of electricity.Separately
A kind of outer method is that inclination angle and sag are measured in real time, and the stressing conditions of circuit are calculated by transmission line status equation.
But the shortcoming of both approaches is measuring instrument easily to be disturbed by powerful external electromagnetic field, operation is cumbersome, does not allow
Easily monitoring, error is larger.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of contactless real-time time sequence chart frame vision of wire
Measurement apparatus and method.
The technical scheme that is used of device of the present invention is：A kind of contactless real-time time sequence chart frame vision of wire is surveyed
Measure device, it is characterised in that：Including power transmission line, conductor spacer, image mechanism, data processing module, wireless signal transmitting module；
The conductor spacer is fixedly installed between the power transmission line be arrangeding in parallel, it is relative between power transmission line for limiting
Motion；The image mechanism is fixed on the conductor spacer, for shooting microspur video image；The data processing module is by institute
The microspur video image for stating image mechanism shooting is handled, and is sent to ground by the wireless signal transmitting module by result
Face monitoring center.
The technical scheme that is used of method of the present invention is：A kind of contactless real-time time sequence chart frame vision of wire is surveyed
Amount method, it is characterised in that comprise the following steps：
Step 1：Calculate power transmission line Shape Coefficient μsc(t), wind direction and power transmission line angular separation degree θ (t)；
Step 2：Calculate wind load；
Step 3：The vibration shape of computing electric power line；
Step 4：Microspur video image is handled；
Step 5：Calculate transmission of electricity uniaxial stress and sag；
Step 6：When the tension for measuring power transmission line is more than threshold value F0When, alarm is sent, so as to set up real-time early warning mechanism.
It is an advantage of the invention that：
1, alarm can be positioned and sent to reaching that the wire of limit stress is prepared, operation portion is notified in the very first time
Door, is really achieved the effect of early warning in advance, solves the difficult power taking of traditional sensors, the shortcomings of transmission range is short.
2, microcosmic shooting and the microcosmic video image analysis of real-time online microspur of a wide range of wire can be achieved.Can be to a certain
The wire in area carries out long-term continuous real time on-line monitoring, the development law of stress in wire is obtained, so as to the power transmission tower frame
Assessed in real time.
Brief description of the drawings
Fig. 1 is the structure drawing of device of the embodiment of the present invention；
Fig. 2 is the power transmission line surface texture figure of the embodiment of the present invention；
Fig. 3 is the wind load variation diagram of the embodiment of the present invention；
The explanation figure that Fig. 4 divides for the power transmission line of the embodiment of the present invention；
Fig. 5 is the bending vibation mode picture of the embodiment of the present invention；
Fig. 6 is the explanation figure for looking for shape method of the embodiment of the present invention；
In figure, 1 it is power transmission line, 2 is conductor spacer, 3 is image mechanism, 4 is data processing module, 5 is wireless signal transmission
Module, 6 are fluorescent material.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with the accompanying drawings and embodiment is to this hair
It is bright to be described in further detail, it will be appreciated that implementation example described herein is merely to illustrate and explain the present invention, not
For limiting the present invention.
The contactless real-time time sequence of a kind of wire provided see Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the present invention
Figure frame vision measurement device, including power transmission line 1, conductor spacer 2, image mechanism 3, data processing module 4, wireless signal transmitting module
5；
Conductor spacer 2 is fixedly installed between the power transmission line 1 be arrangeding in parallel, for limiting the relative motion between power transmission line 1；
Image mechanism 3 is fixed on conductor spacer 2, for shooting microspur video image；Data processing module 4 shoots image mechanism 3
Microspur video image is handled, and result is sent into ground monitoring center by wireless signal transmitting module 5.
The image mechanism 3 of the present embodiment is microspur video image acquisition equipment, and its camera lens can be replaced by difference as needed
The camera lens of multiplication factor；The surface of power transmission line 1 is provided with different decorative patterns, and power transmission line 1 is uniformly coated with fluorescent material 6 above.
The contactless real-time time sequence chart frame vision measuring method of a kind of wire that the present invention is provided, including following step
Suddenly：
Step 1：The calculating of power transmission line Shape Coefficient and wind direction and power transmission line angular separation degree；
In order to be monitored in real time to wind load, layer of fluorescent powder is uniformly coated with power transmission line outer surface, such as Fig. 2 institutes
Show.In wind action, fluorescent material will be with air motion.Then, power transmission line is shot using image mechanism, shot
Microspur image the path of fluorescent material can be described, as shown in figure 3, and then analyzing the state of wind load.Pass through analysis
Obtain the Shape Coefficient μ of t power transmission linesc(t) the folder angle, θ (t) between wind direction and power transmission line direction.
Step 2：The calculating of wind load；
F1(t)=α βcμsc(t)μzω0dLsin2θ(t)；
In formula, F1(t) be horizontal wind excitation standard value in t perpendicular to power transmission line and ground wire direction, α be blast not
Coefficient of uniformity；βcIt is power transmission line and ground wire Wind Load Adjustment Coefficients；μsc(t) be power transmission line Shape Coefficient；μzIt is blast height
Variation coefficient；w0It is fundamental wind pressure standard value；L is the horizontal span of power transmission tower；D is the external diameter of power transmission line, and division power transmission line takes
The summation of all sub- power transmission line external diameters；θ (t) is the angle degree between t wind direction and power transmission line direction.
Step 3：Power transmission line looks for shape；
By power transmission line in the movement locus of three dimensions, decompose in perpendicular and horizontal plane, as shown in Figure 6.
In perpendicular, projection of the power transmission line in the plane is divided into n unit, as shown in Figure 4；To transmission of electricity in each plane
Line carries out model analysis, and oscillatory differential equation is as follows：
Wherein, [M] is mass matrix, and [C] is damping matrix, and [K] is stiffness matrix, and d is displacement, and F (t) is external force, this
In only consider gravity and wind load.Equation is solved, the displacement of each unit is obtained, and then obtains shaking for power transmission line in perpendicular
Type, vibration shape example such as Fig. 5.Similarly, the power transmission line vibration shape interior in horizontal plane can be tried to achieve.
Step 4：The processing of microspur video image；
Shooting imaging is carried out to the power transmission line under different conditions using image mechanism 3, microspur video gradation figure is then changed into
Picture；The multiframe consecutive image intercepted using in power transmission line vibrational image chooses conductor spacer as tracking target to create as research object
Contour feature template is built, transmission of electricity line position is positioned by matching conductor spacer and power transmission line strain stress is calculated.
Step 5：The calculating of transmission of electricity uniaxial stress and sag；
Sag f=E (ε-the ε of power transmission line0)/g, wherein E are the modulus of elasticity of wire, ε0For transmission line wire minimum point
Strain, g carries for the ratio of power transmission line；Calculate the sag f of power transmission line on image1, and set up and quantified with the sag f of power transmission line
Relation；Meanwhile, set up the pulling force F of power transmission line strain stress and power transmission line quantitative relationship；Finally, the sag threshold value of power transmission line is set
f0With pulling force threshold value F0；
Step 6：The realization of early warning；
When the tension measured is more than threshold value F0When, wireless signal transmitting module 5 sends the signal to ground monitoring center,
Monitoring personnel adopts an effective measure immediately, so as to set up real-time early warning mechanism.
Although this specification more used power transmission line 1, conductor spacer 2, image mechanism 3, data processing module 4, wireless
The terms such as signal emission module 5, fluorescent material 6, but it is not precluded from the possibility using other terms.It is only using these terms
In order to more easily describe the essence of the present invention, being construed as any additional limitation is all and spiritual phase of the invention
Run counter to.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, therefore it can not be considered to this
The limitation of invention patent protection scope, one of ordinary skill in the art is not departing from power of the present invention under the enlightenment of the present invention
Profit is required under protected ambit, can also be made replacement or be deformed, each fall within protection scope of the present invention, this hair
It is bright scope is claimed to be determined by the appended claims.
Claims (10)
1. a kind of contactless real-time time sequence chart frame vision measurement device of wire, it is characterised in that：Including power transmission line (1),
Conductor spacer (2), image mechanism (3), data processing module (4), wireless signal transmitting module (5)；
The conductor spacer (2) is fixedly installed between the power transmission line (1) be arrangeding in parallel, for limiting between power transmission line (1)
Relative motion；The image mechanism (3) is fixed on the conductor spacer (2), for shooting microspur video image；The data
Processing module (4) is handled the microspur video image that the image mechanism (3) is shot, and result is passed through described wireless
Signal emission module (5) is sent to ground monitoring center.
2. the contactless real-time time sequence chart frame vision measurement device of wire according to claim 1, it is characterised in that：
The image mechanism (3) is microspur video image acquisition equipment, and its camera lens can be replaced by the mirror of different amplification as needed
Head.
3. the contactless real-time time sequence chart frame vision measurement device of wire according to claim 1, it is characterised in that：
The surface of the power transmission line (1) is provided with different decorative patterns.
4. the contactless real-time time sequence chart frame vision measurement device of wire according to claim 1-3 any one,
It is characterized in that：The power transmission line (1) is uniformly coated with fluorescent material (6) above.
5. a kind of contactless real-time time sequence chart frame vision measuring method of wire, it is characterised in that comprise the following steps：
Step 1：Calculate power transmission line Shape Coefficient μsc(t), wind direction and power transmission line angular separation degree θ (t)；
Step 2：Calculate wind load；
Step 3：The vibration shape of computing electric power line；
Step 4：Microspur video image is handled；
Step 5：Calculate transmission of electricity uniaxial stress and sag；
Step 6：When the tension for measuring power transmission line is more than threshold value F0When, alarm is sent, so as to set up real-time early warning mechanism.
6. the contactless real-time time sequence chart frame vision measuring method of wire according to claim 5, it is characterised in that：
In step 1, power transmission line (1) is shot using image mechanism (3), the microspur image of shooting can describe fluorescent material (6)
Path, the Shape Coefficient μ of t power transmission line (1) is obtained by analysissc(t) the folder angle, θ between wind direction and power transmission line direction
(t)。
7. the contactless real-time time sequence chart frame vision measuring method of wire according to claim 5, it is characterised in that
In step 2, Wind load calculating formula is：
F1(t)=α βcμsc(t)μzω0dLsin2θ(t)；
In formula, F1(t) it is horizontal wind excitation standard value in t perpendicular to power transmission line and ground wire direction, α is that blast is uneven
Coefficient；βcIt is power transmission line and ground wire Wind Load Adjustment Coefficients；μsc(t) be power transmission line Shape Coefficient；μzIt is blast height change
Coefficient；w0It is fundamental wind pressure standard value；L is the horizontal span of power transmission tower；D is the external diameter of power transmission line, and division power transmission line takes all
The summation of sub- power transmission line external diameter；θ (t) is the angle degree between t wind direction and power transmission line direction.
8. the contactless real-time time sequence chart frame vision measuring method of wire according to claim 5, it is characterised in that：
In step 3, by power transmission line in the movement locus of three dimensions, decompose in perpendicular and horizontal plane；In perpendicular,
Projection of the power transmission line in the plane is divided into n unit, model analysis is carried out to power transmission line in each plane, is vibrated micro-
Divide equation as follows：
Wherein, [M] is mass matrix, and [C] is damping matrix, and [K] is stiffness matrix, and d is displacement, and F (t) is external force, is only considered
Gravity and wind load；Equation is solved, the displacement of each unit is obtained, and then obtain the vibration shape of transmission line of electricity in perpendicular；Together
Reason, tries to achieve the transmission line of electricity vibration shape interior in horizontal plane.
9. the contactless real-time time sequence chart frame vision measuring method of wire according to claim 5, it is characterised in that：
In step 4, shooting imaging is carried out to the power transmission line under different conditions using using image mechanism (3), microspur video is then changed into
Gray level image；The multiframe consecutive image intercepted using in power transmission line vibrational image chooses conductor spacer (2) as tracking as research object
Target positions transmit electricity line position and calculating power transmission line strain stress by matching conductor spacer (2) to create contour feature template.
10. the contactless real-time time sequence chart frame vision measuring method of wire according to claim 5, its feature exists
In：In step 5, the sag f=E (ε-ε of power transmission line0)/g, wherein E are the modulus of elasticity of wire, ε0Should for power transmission line minimum point
Become, g carries for the ratio of power transmission line；Calculate the sag f of wire on image1, and set up the quantitative pass with the sag f of power transmission line
System；Meanwhile, set up the pulling force F of power transmission line strain stress and power transmission line quantitative relationship；Finally, the sag threshold value f of power transmission line is set0
With pulling force threshold value F0。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289982.4A CN107014297B (en) | 2017-04-27 | 2017-04-27 | A kind of contactless real-time time sequence chart frame vision measurement device of conducting wire and method |
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| CN201710289982.4A CN107014297B (en) | 2017-04-27 | 2017-04-27 | A kind of contactless real-time time sequence chart frame vision measurement device of conducting wire and method |
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| CN107014297A true CN107014297A (en) | 2017-08-04 |
| CN107014297B CN107014297B (en) | 2019-04-09 |
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| CN201710289982.4A Expired - Fee Related CN107014297B (en) | 2017-04-27 | 2017-04-27 | A kind of contactless real-time time sequence chart frame vision measurement device of conducting wire and method |
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| CN112623270A (en) * | 2020-12-23 | 2021-04-09 | 北京空天技术研究所 | High-speed separation measuring device and method based on high-speed camera shooting and target line |
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