CN102679913A - Image type knife switch in-place monitoring system and method - Google Patents
Image type knife switch in-place monitoring system and method Download PDFInfo
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- CN102679913A CN102679913A CN201210168142XA CN201210168142A CN102679913A CN 102679913 A CN102679913 A CN 102679913A CN 201210168142X A CN201210168142X A CN 201210168142XA CN 201210168142 A CN201210168142 A CN 201210168142A CN 102679913 A CN102679913 A CN 102679913A
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- disconnecting link
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- monitoring system
- light source
- reflective marker
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Abstract
The invention discloses an image type knife switch in-place monitoring system and method. The monitoring system consists of a reflective marker, a light source, a lens, a camera, a protective mechanism, transmission cables and a computer. The reflective marker is arranged on a moving part of a knife switch and moves along with the knife switch. The light source, the lens and the camera are all arranged inside the protective mechanism and near the knife switch. The reflective marker is illuminated by the light source; the knife switch including the reflective marker is imaged onto an image surface of the camera through the lens; the obtained image is transmitted into the computer; and after the image is processed, whether the knife switch is in place and contacted reliably is finally judged. By adoption of a non-contact image measuring principle, whether the contact is reliable can be judged simultaneously when whether the knife switch is in place is judged. Meanwhile, the image type knife switch in-place monitoring system is strong in interference resistance, convenient to install, water-proof and dust-proof, applicable to knife switches of any specifications and types, excellent in universality, and widely applied to knife switch monitoring in various smart substations.
Description
Technical field
The present invention relates to a kind of disconnecting link to level monitoring system and detection method, particularly, is that a kind of disconnecting link based on computer vision and reflex reflection technology is to level monitoring system and method.
Background technology
It more is that the means that adopt artificial scene to utilize telescope observation, the person in charge to judge are accomplished that present disconnecting link whether puts in place.This mode is time-consuming, effort, efficient are low, and receives observer's subjectivity influence easily.
The existing disconnecting link automatic testing method that puts in place; Can be divided into direct measurement (measuring point is at contacting points position) and measure (detecting position principle contacting points position) two types indirectly according to the difference that detects the position; Thermometry (measuring the contact point temperature rise), dynamometry (measuring the pressure of compression spring in contacting points position contact stress or the bar wall), telemetry (measuring the distances of moving contact U type groove two arms) etc. can be divided into according to the difference of detected parameters, electromagnetic method, optical method, dynamometry, image method etc. can be divided into according to the difference of measuring principle.
Image method is to adopt computer vision technique; Can obtain the image of disconnecting link region through video camera; Automatically identify the folding condition and the ERST of switch tool through the recognition methods of Flame Image Process good model, just can report to the police its ERST (being disconnecting link state not in place).This method belongs to direct force measuring method; Working stability, reliable, directly perceived, particularly to around strong-electromagnetic field disturb and have good resistivity, and the work that does not influence original disconnecting link system is installed by system; Robotization and intelligent degree are high, are the inexorable trends of Future Development.For example; North China Electric Power University's master thesis " status of electric power based on Flame Image Process detects " adopts image recognition technology that the disconnecting link disconnection of transformer station, closed state are detected; After image being carried out pre-service such as histogram enhancing, smoothing denoising, image sharpening; Extract the half-tone information of key position, utilize difference that pixel value and pixel count square to judge the state of disconnecting link.
But present image monitoring method exists many defectives and deficiency, and for example strong to the weather dependence, recognition accuracy is not high, and the reliability of recognition result is relatively poor.Particularly, whether whether existing various monitoring methods all can only be discerned disconnecting link and put in place, contact reliably but can not discern.
Summary of the invention
The present invention is directed to the present situation of existing disconnecting link monitoring technology; A kind of image-type disconnecting link is proposed to level monitoring system and method; Adopt initiatively illumination and reflex reflection technology, realize the noncontact on-line monitoring that disconnecting link puts in place and contacts, thereby can satisfy the monitoring requirement that puts in place of various forms disconnecting link.
The present invention realizes through following technical scheme:
Image-type disconnecting link of the present invention is made up of reflective marker, light source, camera lens, video camera, protection mechanism, transmission cable and computing machine to level monitoring system.Reflective marker is installed on the mobile position of disconnecting link, and moves with disconnecting link.Light source, camera lens, video camera are installed within the protection mechanism, and are placed near the disconnecting link.Light source illuminates reflective marker; And will comprise reflective marker through camera lens and be imaged onto on the image planes of video camera at interior disconnecting link; In computing machine, handle this image by computing machine through cable transmission for the image that is obtained, and judges finally whether disconnecting link puts in place and reliably contact.
Described reflective marker is made up of the zone of reflections and substrate.The zone of reflections is the slender type shape, adopts reflecting material to make.Substrate is the rectangle shape, and the surface has diffusing characteristic diffuser, can adopt conventional material such as aluminium alloy.The zone of reflections can directly be pasted on the substrate, is positioned at the center, and the entire emission sign is fixed on the moving contact of disconnecting link.
Described light source adopts the light source with the video camera coaxial-illuminating, to guarantee best reflex reflection effect.Can adopt conventional annular light sources such as LED or laser.In order to guarantee illuminating effect, light source should have the suitable angle of divergence, guarantees that most light beam throwing is in the field range of video camera.
Described camera lens should guarantee that field range can comprise the zone of reflective marker in interior disconnecting link contact, and the change in location scope of reflective marker in the disconnecting link moving process also should be satisfied in this zone.
Described video camera is the technical grade digital camera, and adopts the network interface output image data, and antijamming capability is strong.
Described transmission cable adopts the netting twine with function of shielding, to guarantee maximum antijamming capability and long-distance transmissions ability.
The present invention provides a kind of and adopts above-mentioned monitoring system to carry out put in place the method for on-line monitoring of disconnecting link, and its step is following:
(1) at first connects the power supply of monitoring system, comprise camera power supply and computer power supply, start software systems automatically;
(2) when disconnecting link begins to close arm, send steering order to computing machine, begin to carry out continuous automatic inspection;
(3) under the control of computing machine, open light source and illuminate disconnecting link contact area and reflective marker.The image that quick sampling should the zone then is real-time transmitted in the computing machine;
(4) computing machine obtains after the sampled images, obtains the profile of two reflective markers through binary conversion treatment, and carries out fitting a straight line, obtains the angle of two straight lines, is the separation angle of disconnecting link moving contact;
(5) the built-in critical value of separation angle that obtains and system is compared:, repeat above-mentioned (3)-(5) step if separation angle, explains then that disconnecting link does not put in place greater than this critical value; If separation angle is equal to or less than this critical value, explain that then disconnecting link puts in place, send the disconnecting link signal that puts in place to host computer, observation process finishes.
Above-mentioned monitoring system of the present invention and method adopt non-contacting image measurement principle, can judge not only whether disconnecting link puts in place, and can judge whether that contact is reliable.Simultaneously, monitoring system antijamming capability of the present invention is strong, easy for installation, water proof and dust proof, and applicable to the disconnecting link of any specification and form, highly versatile, but the monitoring of the disconnecting link of widespread use and various intelligent substations.
Description of drawings
Fig. 1 is that image-type disconnecting link of the present invention is formed synoptic diagram to level monitoring system;
Fig. 2 is that reflective marker structure of the present invention is formed synoptic diagram;
Fig. 3 is the disconnecting link of the present invention determination methods synoptic diagram that puts in place;
Among the figure, 1-reflective marker, 2-light source, 3-camera lens, 4-video camera, 5-protection mechanism, 6-transmission cable, 7-computing machine, 8-moving contact, 9-static contact, the 10-zone of reflections, 11-substrate.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, present embodiment is that prerequisite is implemented with technical scheme of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, image-type disconnecting link of the present invention is made up of reflective marker 1, light source 2, camera lens 3, video camera 4, protection mechanism 5, transmission cable 6 and computing machine 7 to level monitoring system.Reflective marker 1 is installed on the mobile position (moving contact 8) of disconnecting link, and moves with disconnecting link.Light source 2, camera lens 3, video camera 4 are installed within the protection mechanism 5, and are placed near the correct position the disconnecting link.Light source 2 illuminates reflective marker 1; And will comprise reflective marker 1 through camera lens 3 and be imaged onto on the image planes of video camera 4 at interior disconnecting link; The image that is obtained is transferred in the computing machine 7 through cable 6, through handling, can judge finally whether disconnecting link puts in place and reliably contact.
As shown in Figure 2, described reflective marker 1 is made up of the zone of reflections 10 and substrate 11.The zone of reflections 10 is the slender type shape, adopts reflecting material to make.Substrate 11 is the rectangle shape, and the surface has diffusing characteristic diffuser, can adopt conventional material such as aluminium alloy, utilizes processes such as sandblast, anodic oxidation to realize the diffuse reflection on surface.The zone of reflections 10 can directly stick on the substrate 11, is positioned at the center, and entire emission sign 1 can be through screw retention on the moving contact 8 of disconnecting link.
Described light source 2 adopts the light source with video camera 4 coaxial-illuminatings, to guarantee best reflex reflection effect.Can adopt conventional annular light sources such as LED or laser.In order to guarantee illuminating effect, light source 2 should have the suitable angle of divergence, guarantees that most light beam throwing is in the field range of video camera 4.
Described camera lens 3 should guarantee that field range can comprise certain zone of the disconnecting link contact that comprises reflective marker l, and the change in location scope of reflective marker 1 in the disconnecting link moving process also should be satisfied in this zone.
Described video camera 4 is the technical grade digital camera, and adopts the network interface output image data, and antijamming capability is strong.The pixel count of video camera 4 should guarantee that the pixel count of imaging of reflective marker is many as far as possible, is good to be no less than 10pixel.
Described transmission cable 6 adopts the netting twine with function of shielding, to guarantee maximum antijamming capability and long-distance transmissions ability.
Present embodiment utilizes above-mentioned monitoring system to carry out the disconnecting link monitoring that puts in place, and concrete testing process is following:
(1) at first connects the power supply of monitoring system, comprise the power supply of video camera 4 and the power supply of computing machine 7, start software systems automatically;
(2) when disconnecting link begins to close arm, send steering order to computing machine 7, begin to carry out continuous automatic inspection;
(3) under the control of computing machine 7, open light source 2 and illuminate the disconnecting link contact area and reflective marker 1.The image that quick sampling should the zone then is real-time transmitted in the computing machine 7;
(4) computing machine 7 obtains after the sampled images; Obtain the profile of two reflective markers 1 through binary conversion treatment; And carry out fitting a straight line; Obtain the angle of two straight lines, be the separation angle (
as shown in Figure 3) of disconnecting link moving contact:
(5) separation angle that obtains
and the built-in critical value
of system are compared: if separation angle
greater than this critical value
then explain that disconnecting link does not put in place, repeats above-mentioned (3)-(5) step; If separation angle
is equal to or less than this critical value
then disconnecting link is described, and oneself puts in place; Send the disconnecting link signal that puts in place to host computer, observation process finishes.
Disconnecting link of the present invention adopts non-contacting image measurement principle to level monitoring system and method, can judge not only whether disconnecting link puts in place, and can judge whether that contact is reliable.Simultaneously, detection system antijamming capability of the present invention is strong, easy for installation, water proof and dust proof, and applicable to the disconnecting link of any specification and form, highly versatile, but the monitoring of the disconnecting link of widespread use and various intelligent substations.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (10)
1. an image-type disconnecting link is to level monitoring system; It is characterized in that: said monitoring system is made up of reflective marker, light source, camera lens, video camera, protection mechanism, transmission cable and computing machine; Reflective marker is installed on the mobile position of disconnecting link, and moves with disconnecting link; Light source, camera lens, video camera are installed within the protection mechanism, and are placed near the disconnecting link; Light source illuminates reflective marker; And will comprise reflective marker through camera lens and be imaged onto on the image planes of video camera at interior disconnecting link; In computing machine, handle this image by computing machine through cable transmission for the image that is obtained, and judges finally whether disconnecting link puts in place and reliably contact.
2. image-type disconnecting link according to claim 1 is characterized in that to level monitoring system: said reflective marker is made up of the zone of reflections and substrate, and the zone of reflections directly is pasted on the substrate center position, and the entire emission sign is fixed on the moving contact of disconnecting link.
3. image-type disconnecting link according to claim 2 is characterized in that to level monitoring system: the said zone of reflections is the slender type shape, adopts reflecting material to make; Said substrate is the rectangle shape, and the surface has diffusing characteristic diffuser.
According to each described image-type disconnecting link of claim 1-3 to level monitoring system, it is characterized in that: described light source adopts the light source with the video camera coaxial-illuminating, the angle of divergence that light source is set guarantees that most light beam throws in the field range of video camera.
5. image-type disconnecting link according to claim 4 is characterized in that to level monitoring system: described light source adopts annular light source.
According to each described image-type disconnecting link of claim 1-3 to level monitoring system; It is characterized in that: said camera lens should guarantee that field range comprises the zone of reflective marker in interior disconnecting link contact, and the change in location scope of reflective marker in the disconnecting link moving process also should be satisfied in this zone.
According to each described image-type disconnecting link of claim 1-3 to level monitoring system, it is characterized in that: said video camera is the technical grade digital camera, and adopts the network interface output image data.
8. image-type disconnecting link according to claim 7 is characterized in that to level monitoring system: the pixel count of said video camera should guarantee that the pixel count of the imaging of reflective marker is no less than 10pixel.
According to each described image-type disconnecting link of claim 1-3 to level monitoring system, it is characterized in that: said transmission cable adopts the netting twine with function of shielding.
10. one kind is adopted the said image-type disconnecting link of claim 1-9 to carry out put in place the method for on-line monitoring of disconnecting link to level monitoring system, it is characterized in that said monitoring step is following:
(1) at first connects the power supply of monitoring system, comprise camera power supply and computer power supply, start software systems automatically;
(2) when disconnecting link begins to close arm, send steering order to computing machine, begin to carry out continuous automatic inspection;
(3) under the control of computing machine, to open light source and illuminate disconnecting link contact area and reflective marker, the image that quick sampling should the zone then is real-time transmitted in the computing machine;
(4) computing machine obtains after the sampled images, obtains the profile of two reflective markers through binary conversion treatment, and carries out fitting a straight line, obtains the angle of two straight lines, is the separation angle of disconnecting link moving contact;
(5) the built-in critical value of separation angle that obtains and system is compared:, repeat above-mentioned (3)-(5) step if separation angle, explains then that disconnecting link does not put in place greater than this critical value; If separation angle is equal to or less than this critical value, explain that then disconnecting link puts in place, send the disconnecting link signal that puts in place to host computer, observation process finishes.
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| CN201210168142.XA CN102679913B (en) | 2012-05-25 | 2012-05-25 | Image type knife switch in-place monitoring system and method |
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| CN102679913B CN102679913B (en) | 2014-12-24 |
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Cited By (10)
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| CN102890236A (en) * | 2012-09-25 | 2013-01-23 | 许继集团有限公司 | Device and method for detecting complete turn-on of high-voltage isolating switch |
| CN106091963A (en) * | 2016-05-25 | 2016-11-09 | 江西洪都航空工业集团有限责任公司 | Undercarriage fault detection method based on noncontact vision |
| CN106428626A (en) * | 2016-09-23 | 2017-02-22 | 江西洪都航空工业集团有限责任公司 | Method for extracting motion trail image feature of landing gear |
| CN107328479A (en) * | 2017-07-10 | 2017-11-07 | 国网黑龙江省电力有限公司电力科学研究院 | One kind is used for power equipment infrared photography photo array method and witness marker thing |
| CN109341602A (en) * | 2018-11-30 | 2019-02-15 | 国网湖北省电力有限公司宜昌供电公司 | Keeping apart based on optical signature closes rear position detecting device and detection method |
| CN109931868A (en) * | 2019-04-16 | 2019-06-25 | 贵州电网有限责任公司 | A kind of isolation switch station acquisition device based on image recognition |
| CN110601376A (en) * | 2019-09-11 | 2019-12-20 | 国网陕西省电力公司咸阳供电公司 | High-voltage isolating switch closing in-place monitoring device and method |
| CN110942937A (en) * | 2019-11-05 | 2020-03-31 | 贵州电网有限责任公司 | Disconnecting link state non-homologous determination system and method |
| CN113029539A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司佛山供电局 | High-voltage disconnecting link stroke and speed detection system and method |
| CN114050081A (en) * | 2021-11-11 | 2022-02-15 | 许昌许继软件技术有限公司 | Isolating switch |
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Cited By (13)
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| CN102890236A (en) * | 2012-09-25 | 2013-01-23 | 许继集团有限公司 | Device and method for detecting complete turn-on of high-voltage isolating switch |
| CN106091963A (en) * | 2016-05-25 | 2016-11-09 | 江西洪都航空工业集团有限责任公司 | Undercarriage fault detection method based on noncontact vision |
| CN106428626A (en) * | 2016-09-23 | 2017-02-22 | 江西洪都航空工业集团有限责任公司 | Method for extracting motion trail image feature of landing gear |
| CN107328479B (en) * | 2017-07-10 | 2019-10-08 | 国网黑龙江省电力有限公司电力科学研究院 | A kind of witness marker object for power equipment |
| CN107328479A (en) * | 2017-07-10 | 2017-11-07 | 国网黑龙江省电力有限公司电力科学研究院 | One kind is used for power equipment infrared photography photo array method and witness marker thing |
| CN109341602A (en) * | 2018-11-30 | 2019-02-15 | 国网湖北省电力有限公司宜昌供电公司 | Keeping apart based on optical signature closes rear position detecting device and detection method |
| CN109341602B (en) * | 2018-11-30 | 2023-11-10 | 国网湖北省电力有限公司宜昌供电公司 | Device and method for detecting position of disconnecting switch after closing based on optical characteristics |
| CN109931868A (en) * | 2019-04-16 | 2019-06-25 | 贵州电网有限责任公司 | A kind of isolation switch station acquisition device based on image recognition |
| CN110601376A (en) * | 2019-09-11 | 2019-12-20 | 国网陕西省电力公司咸阳供电公司 | High-voltage isolating switch closing in-place monitoring device and method |
| CN110942937A (en) * | 2019-11-05 | 2020-03-31 | 贵州电网有限责任公司 | Disconnecting link state non-homologous determination system and method |
| CN113029539A (en) * | 2021-03-10 | 2021-06-25 | 广东电网有限责任公司佛山供电局 | High-voltage disconnecting link stroke and speed detection system and method |
| CN114050081A (en) * | 2021-11-11 | 2022-02-15 | 许昌许继软件技术有限公司 | Isolating switch |
| CN114050081B (en) * | 2021-11-11 | 2024-02-13 | 许昌许继软件技术有限公司 | Isolation switch |
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