CN207585565U - A kind of non-contact laser railway contact line detection device - Google Patents
A kind of non-contact laser railway contact line detection device Download PDFInfo
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- CN207585565U CN207585565U CN201721292946.5U CN201721292946U CN207585565U CN 207585565 U CN207585565 U CN 207585565U CN 201721292946 U CN201721292946 U CN 201721292946U CN 207585565 U CN207585565 U CN 207585565U
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Abstract
The utility model is related to a kind of non-contact laser railway contact line detection devices.The detection device includes fixed shell, data processing unit, conducting ring, modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measuring circuit, turntable, direct current generator, gyroscope and absolute type encoder；Wherein the stator of conducting ring connect fixation with fixed shell, the rotor of conducting ring and the coaxially connected fixation of turntable, the stator of direct current generator connect fixation with fixed shell, the stator connection of the stator and direct current generator of absolute type encoder is fixed, the rotor of direct current generator and the center axis connection of turntable are fixed, and modulation circuit, driving circuit, optical system, receiving circuit and demodulation and phase measuring circuit are located on turntable.The utility model, which realizes, to be approached conductor height each in railway contact line, stagger, conducting wire and quick, real-time, the accurate measurement of conductor thickness.
Description
Technical field
The utility model belongs to photoelectric measurement field, is related to a kind of non-contact laser railway contact line detection device.
Background technology
It is skyrocketed through as China is economical in recent years, the transport capacity of railway transportation traffic is also constantly being promoted no matter
It is common railway construction and high speed railway construction, all has been enter into world forefront.But meanwhile the supervision of railway construction quality is needed
Further strengthen, higher requirement is needed to the detectability of links.
Contact net is that Along Railway overhead sets up the standby transmission line of electricity powered to electric locomotive, and electric locomotive (includes height
Fast electric locomotive) operation when the electric current that needs all rely on contact net.Contact net is the important component of the railway system,
It is also the body frame structure of Railway Electric engineering.Therefore, during the railway construction and during day-to-day operation safeguards, need to contact net into
Row accurately and effectively detects, including the key indexes such as conductor height, stagger, conducting wire close distance, conductor thickness.It is right both at home and abroad
The detection technique research of contact net is also being constantly updated, with regard to the current stage, mainly have multi-functional catenary design, imaging method and
The methods of multiple spot laser offset amount, these methods have respective Some features：
(1) multi-functional catenary design
By taking Switzerland OPTIMESS multifunctional examining measuring cars as an example, which is similar to a complete headstock, in headstock
Top is equipped with laser scanner, and scanning angle is 60 ° -270 °；It, can be in locomotive bottom equipped with 2 latitude laser sensors
Vehicle body offset data is provided when dynamic operation detects；System detectio point spacing is 0.3-0.4m, the measuring precision 3mm.It should
The accuracy of detection of multifunctional examining measuring car is higher, but price is very expensive, largely purchases relatively difficult.
(2) imaging method
Since it is desired that measure vertical range of the cable apart from roof or rail level, it is thus proposed that application binocular vision 3D into
The measurement to contact net is completed as method.This method is needed using two image devices, and demarcates two image devices in advance
Optical axis included angle, two image devices simultaneously to target imaging, using triangular ranging method obtain target depth information (i.e. away from
From).But this method has certain limitation, is the relationship of distance and resolution ratio first, in a certain distance, due to imaging
The resolution ratio of detector is higher, therefore can obtain higher resolution ratio, but with the increasing of distance, resolution ratio can gradually drop
It is low；Secondly, the angle of two film explorers needs advance Accurate Calibration, otherwise can cause gross error；In addition, the instrument generally needs
Will the instrument sky shooting is measured upward vertically, outdoors during daylight hours using when stronger background sunlight can cause the full of detector
With image device target surface can be burnt when serious.
(3) multiple spot laser offset amount method
It is hardened with four-quadrant photocell that a kind of laser is proposed in patent (application publication number is 104019741 A of CN)
Close the Contact Line Detection device and method of application.This method center principle is that laser is fixed on contact net stent, four-quadrant light
Solar panel is fixed on contact line conducting wire, and when contact line conducting wire does not shift, laser facula is located at four-quadrant photocell plate
Center, when contact line conducting wire shifts, can be calculated and led in the offset of four-quadrant photocell plate according to laser facula
The degrees of offset of line.This method is simple and practicable, but contact line conducting wire offset can only be measured in fixed position, when needing to a certain section
When railway is detected, measurement of largely layouting is needed；Secondly as laser and four-quadrant photocell plate are stationary state,
Actually active measurement range detects the full-size of target surface for four-quadrant photocell plate, when gate break has exceeded this range
When, it will be unable to measure；In addition, measurement content is single, it is only capable of whether measure traverse line deviates, conductor height can not be completed, conducting wire connects
The key indexes such as near and conductor thickness.
Utility model content
In order to solve insufficient and limitation present in prior art products in technical background, realize to railway (containing at a high speed
Railway) each conductor height, stagger in contact net, conducting wire approaches and quick, real-time, the accurate measurement of conductor thickness, this reality
It is combined with the novel one kind that proposes based on linear array scanning formula phase laser distance method with gyroscope to railway (containing high-speed railway)
The device that catenary's parameters are detected.
The technical solution that the utility model uses is as follows：
The utility model provides a kind of non-contact laser railway contact line detection device, including fixed shell, data
Processing unit, conducting ring, modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measuring circuit, turn
Disk, direct current generator, gyroscope and absolute type encoder；
Wherein, modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measuring circuit and half
Conductor Laser pipe is installed in the top of turntable；
Conducting ring is connect with modulation circuit, and modulation circuit drives semiconductor laser tube transmitting outgoing by laser drive circuit
Laser, shoot laser emit by optical system to railway contact line；The reflected light of railway contact line passes through meeting after optical system
Gather in receiving circuit, receiving circuit is converting optical signals to electric signal transmission to demodulation and phase measuring circuit；Demodulation and phase
Position measuring circuit is electrically connected by conducting ring with data processing unit；
The rotor coaxial of turntable and conducting ring is installed, and conducting ring is located at the lower section of turntable；The stator of conducting ring and fixation
Housing connection is fixed；The stator of direct current generator connect fixation with fixed shell, and the rotor of direct current generator passes through conducting ring and turntable
Center axis connection fix；The stator of absolute type encoder is fixedly connected with the stator of direct current generator, rotor and direct current generator
Rotor coaxial connection；
Direct current generator, conducting ring, gyroscope and absolute type encoder are electrically connected with data processing unit；
Conducting ring, data processing unit, direct current generator, gyroscope and absolute type encoder are respectively positioned in fixed shell.
Specifically, data processing unit includes DSP processing circuits, data output circuit and DC drive circuit；
Wherein, DSP processing circuits are electrically connected respectively with data output circuit and DC drive circuit；
DSP processing circuits are respectively used to control DC drive circuit, modulation circuit；
Data output circuit is used for triggering DSP processing circuits after receiving external command and works and export testing number to outside
According to；
DC drive circuit is used to that direct current generator to be controlled to work.
Specifically, receiving circuit includes photodetector, photoelectric switching circuit and pre-amplification circuit；
Photodetector is used to receive the optical signal of railway contact line reflection；
Photoelectric switching circuit is used to convert optical signals to voltage signal；
Pre-amplification circuit is used to faint voltage signal being amplified；
Conversion signal way in photoelectric switching circuit is consistent with the pixel number in photodetector.
Specifically, photodetector is linear array APD detector, and 10m object distances can be realized under the cooperation of optical system
Unit pixel resolution ratio is 17.5mm.
Specifically, optical system is common spherical mirror, and focal length≤50mm, field angle≤20 degree, minute surface is coated with infrared increasing
Permeable membrane.
Specifically, the laser wavelength of the semiconductor laser tube is 850nm.
Further, moving trolley is installed below the fixed shell.
Optimization, the output port of the data output circuit are exported using LAN interface, and peak transfer rate is
1000Mbps。
Optimization, the device further include mounted on fixed shell top for protect modulation circuit, laser drive circuit,
The protective cover of optical system, receiving circuit, demodulation and phase measuring circuit, semiconductor laser tube and turntable.
The utility model has the advantage of：
1st, the utility model is combined based on linear array scanning formula phase laser distance method with gyroscope, considers measurement respectively
When range information and angle information, realize the convenient, fast, efficient, high-precision of railway (containing high-speed railway) catenary's parameters
The measurement of degree.
2nd, the utility model uses phase laser distance scanning method measurement distance information, and collimation is good, and precision is high.
3rd, the utility model carries absolute type encoder, and equipment itself scanning range is 0-360 °, and user can be according to application
Demand, voluntarily adjusts valid data detection angle range, and angular resolution is 0.025 °.
4th, the utility model carries gyroscope, and the posture of current device itself can be measured, and by the inclined of equipment
Information of navigating is used for the amendment of distance and angle measurement data so that measurement result is truer, accurate and effective.
5th, the utility model uses linear array APD photoelectric sensor, and scanning field of view range is big, high resolution.
6th, the semiconductor laser tube of the utility model uses 850nm laser, can avoid the interference of visible ray so that equipment exists
Daytime and night can use.
7th, the utility model vertical direction (i.e. conductor height, conductor thickness measure) precision in 10m object distances is ± 1mm；
It is 17.5mm that horizontal direction, which measures (i.e. stagger, which measures, conducting wire is close measures) precision, other better than current market finding to set
It is standby.
8th, the utility model need not additionally install other any ancillary equipments along the railway, easy to use, quick.
9th, the utility model can be independently operated, also to be erected in locomotive or orbital fashion equipment and realize to Along Railway
The continuous measurement of contact net.
10th, the utility model can quickly measure the conductor height, stagger, conducting wire of contact net and approach and conductor height,
It measures abundant in content.
11st, the utility model compact, it is of low cost, it can be widely applied universal.
12nd, the utility model is exported using LAN interface, and peak transfer rate 1000Mbps, data volume is big, and information is rich
Richness, strong antijamming capability, long transmission distance.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the A portions schematic diagram of Fig. 1；
Fig. 3 is the composition frame chart of data processing unit；
Fig. 4 is schematic diagram when detection device works.
Reference numeral is as follows：
1-DSP processing circuits, 2- conducting rings, 3- modulation circuits, 4- laser drive circuits, 5- optical systems, 6- receive electricity
Road, 7- demodulation and phase measuring circuit, 8- turntables, 9- DC drive circuits, 10- direct current generators, 11- absolute type encoders, 12-
Gyroscope, 13- data output circuits, 14- fixed shells, 15- data processing units, 16- protective covers.
Specific embodiment
The utility model is introduced below by one embodiment：
As depicted in figs. 1 and 2, the detection device of the utility model is by fixed shell 14, data processing unit 15, conducting ring
2, modulation circuit 3, laser drive circuit 4, optical system 5, receiving circuit 6, demodulation and phase measuring circuit 7, turntable 8, direct current
Motor 10, absolute type encoder 11, gyroscope 12 form.
Wherein, modulation circuit 3, laser drive circuit 4, optical system 5, receiving circuit 6, demodulation and phase measuring circuit 7
And semiconductor laser tube is installed in the top of turntable 8 and positioned at the top half of fixed shell 14；
Conducting ring 2 is electrically connected with modulation circuit 3, and modulation circuit 3 drives semiconductor laser tube by laser drive circuit 4
Emit shoot laser, shoot laser emits by optical system 5 to railway contact line；The reflected light of railway contact line passes through optics
5 post-concentration of system is converting optical signals to electric signal transmission to demodulation and phase measurement electricity in receiving circuit 6, receiving circuit 6
Road 7；Demodulation and phase measuring circuit 7 are electrically connected by conducting ring 2 with data processing unit 15；
It should be noted that：Receiving circuit includes photodetector, photoelectric switching circuit and pre-amplification circuit；Photoelectricity
Detector is used to receive the optical signal of railway contact line reflection；Photoelectric switching circuit is used to convert optical signals to voltage signal；
Pre-amplification circuit is used to faint voltage signal being amplified；Conversion signal way in photoelectric switching circuit is visited with photoelectricity
The pixel number surveyed in device is consistent.
Turntable 8 and the rotor coaxial of conducting ring 2 are installed, and conducting ring 2 is located at the lower section of turntable 8；The stator of conducting ring 2 with
The connection of fixed shell 14 is fixed；The stator of direct current generator 10 connect fixation with fixed shell 14, and the rotor of direct current generator 10 passes through
Conducting ring 2 and the center axis connection of turntable 8 are fixed；The stator of absolute type encoder 11 is fixed with the stator of direct current generator 10 to be connected
It connects；
Direct current generator 10, conducting ring 2, gyroscope 12 and absolute type encoder 11 are electrically connected with data processing unit；
Conducting ring 2, data processing unit 15, direct current generator 10, gyroscope 12 and absolute type encoder 11 are respectively positioned on fixation
The lower half portion of housing 14.
Specifically, as shown in figure 3, data processing unit 15 include DSP processing circuits 1, data output circuit 13 and
DC drive circuit 9；
Wherein, DSP processing circuits 1 are electrically connected respectively with data output circuit 13 and DC drive circuit 9；
DSP processing circuits 1 are respectively used to control DC drive circuit 9, modulation circuit 3；
Data output circuit 13 is used for triggering DSP processing circuits 1 after receiving external command and works and examined to outside output
Measured data；
DC drive circuit 9 is used to that direct current generator 10 to be controlled to work.
The optical system used in the device is common spherical mirror, and focal length≤50mm, field angle≤20 degree, minute surface is coated with red
Outer anti-reflection film.
By the above-mentioned description to structure of the detecting device, now to once being described using the detection method of the device, have
Body step is as follows：
Step 1) data output circuit 13 triggers DSP processing circuits 1 after externally measured instruction is received and starts to measure；
Step 2) DSP processing circuits 1 trigger modulation circuit 3 by conducting ring 2 and work, while trigger DC drive circuit 9
It starts to work；
Step 3) calculates range information and angle information；
A, the calculating of range information；
A1) modulation circuit 3 generates modulated signal and gives the signal to demodulation and phase measuring circuit 7 as with reference to letter
Number；
A2) the modulated signal driving semiconductor laser tube transmitting and modulation that laser drive circuit 4 is generated according to modulation circuit 3
The consistent continuous laser of signal, semiconductor laser tube are located at the position of focal plane of optical system 5, laser wavelength 850nm；
A3) laser is gone out after optical system 5 to spatial emission, and field angle is 10 °；
A4) heliogram is visited by 5 post-concentration of optical system on the photodetector target surface in receiving circuit 6
Survey device be linear array APD detector, 10m object distance unit pixel resolution ratio 17.5mm；
A5) it is stronger to be converted into signal after opto-electronic conversion and pre-amplification circuit by receiving circuit 6 for faint optical signal
Voltage signal, conversion signal way is consistent with the detector pixel number in receiving circuit 6；
A6) multipath reception signal is respectively mixed by demodulation and phase measuring circuit 7 with local oscillation signal simultaneously, is obtained multichannel and is connect
Receive difference frequency signal；The reference signal that modulation circuit 3 generates with local oscillation signal is mixed and is sent out by demodulation and phase measuring circuit 7
Penetrate difference frequency signal；Difference frequency signal will be received again and does phase-detection with transmitting difference frequency signal, obtains multichannel phase difference, and these are poor
Value gives DSP processing circuits 1；
A7) DSP processing circuits 1 are calculated according to multichannel phase difference value per range information all the way；
B, the acquisition of angle information
B1) DC drive circuit 9 drives 10 uniform rotation of direct current generator in the form of current closed-loop, so as to drive 8 turns of turntable
It is dynamic, modulation circuit 3, driving circuit 4, optical system 5, receiving circuit 6 and demodulation and phase measuring circuit 7 on turntable 8
It rotates therewith, it is achieved thereby that scanning, scanning area is 0-360 °；
B2) absolute type encoder 11 exports absolute angle information data when turntable rotates, which is transferred to DSP processing
Circuit 1；
B3) the current posture yaw information of equipment is transferred to DSP processing circuits 1 by gyroscope 12；
The posture that step 4) DSP processing circuits 1 provide first according to the angle-data of absolute type encoder 11 and gyroscope
Yaw information is modified and compensates to the measurement normal of current device；Then by the range information on every road and revised angle
Information is merged and is handled, and can be calculated elevation information of each conducting wire of tested contact net away from measuring surface, conducting wire stagger, respectively be led
The proximity values of line and conductor thickness value, vertical direction measurement accuracy be ± 1mm, horizontal direction measurement accuracy be 17.5mm, angle
Resolution ratio is 0.025 °；
The fundamental measurement principle of the step is as shown in figure 4, wherein Ae is the detection device absolute zero that gyroscope measurement obtains
Position is the absolute of the utility model detection device centre-to-centre spacing contact net each section relative to yaw angle, the L1-L4 of the earth zero-bit
Distance, A1-A4 are to measure to obtain the angle value of corresponding absolute type encoder during L1-L4, and basic operation is as follows：
1st, Ae and absolute type encoder angle-data A1-A4 are modified, obtain A11, A21, A31, A41；
2nd, conductor height：H1=L2 × cos (A21)；
3rd, conductor thickness：D=H2-H1=L3 × cos (A21)-L4 × cos (A41)；
4th, conducting wire proximity values：D=L3 × sin (A21)+L3 × sin (A31)；
5th, conducting wire stagger 2：S2=L1 × sin (A11)-L2 × sin (A21)；
6th, conducting wire stagger 1：S1=S2+D；
Step 5) data output circuit 13 externally exports the test result of DSP processing circuits 1 with gigabit LAN interface；
When needing continuously to be measured along railway, which can be erected on railcar or locomotive, you can the company of realization
Continuous detection.
The damage to detection device such as bad weather and junk in order to prevent, the detection device are further included mounted on fixation
Upper part of the housing is used to protect modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measuring circuit, half
The protective cover of conductor Laser pipe and turntable.
Claims (9)
1. a kind of non-contact laser railway contact line detection device, it is characterised in that：
Including fixed shell, data processing unit, conducting ring, modulation circuit, laser drive circuit, optical system, receiving circuit,
Demodulation and phase measuring circuit, turntable, direct current generator, gyroscope and absolute type encoder；
Wherein, modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measuring circuit and semiconductor
Laser tube is installed in the top of turntable；
Conducting ring is connect with modulation circuit, and modulation circuit drives semiconductor laser tube transmitting outgoing to swash by laser drive circuit
Light, shoot laser emit by optical system to railway contact line；The reflected light of railway contact line passes through optical system post-concentration
In receiving circuit, receiving circuit converts optical signals to electric signal transmission to demodulation and phase measuring circuit；Demodulation and phase are surveyed
Amount circuit is electrically connected by conducting ring with data processing unit；
The rotor coaxial of turntable and conducting ring is installed, and conducting ring is located at the lower section of turntable；The stator and fixed shell of conducting ring
Connection is fixed；The stator of direct current generator connect fixation with fixed shell, and the rotor of direct current generator is passed through in conducting ring and turntable
Mandrel connection is fixed；The stator of absolute type encoder is fixedly connected with the stator of direct current generator, turn of rotor and direct current generator
Son is coaxially connected；
Direct current generator, conducting ring, gyroscope and absolute type encoder are electrically connected with data processing unit；
Conducting ring, data processing unit, direct current generator, gyroscope and absolute type encoder are respectively positioned in fixed shell.
2. non-contact laser railway contact line detection device according to claim 1, it is characterised in that：At the data
It manages unit and includes DSP processing circuits, data output circuit and DC drive circuit；
Wherein, DSP processing circuits are electrically connected respectively with data output circuit and DC drive circuit；
DSP processing circuits are respectively used to control DC drive circuit, modulation circuit；
Data output circuit is used for triggering DSP processing circuits after receiving external command and works and export detection data to outside；
DC drive circuit is used to that direct current generator to be controlled to work.
3. non-contact laser railway contact line detection device according to claim 2, it is characterised in that：It is described to receive electricity
Road includes photodetector, photoelectric switching circuit and pre-amplification circuit；
Photodetector is used to receive the optical signal of railway contact line reflection；
Photoelectric switching circuit is used to convert optical signals to voltage signal；
Pre-amplification circuit is used to faint voltage signal being amplified；
Conversion signal way in photoelectric switching circuit is consistent with the pixel number in photodetector.
4. non-contact laser railway contact line detection device according to claim 3, it is characterised in that：The photoelectricity is visited
Survey device is linear array APD detector, and it is 17.5mm that 10m object distance unit pixels resolution ratio can be realized under the cooperation of optical system.
5. non-contact laser railway contact line detection device according to claim 4, it is characterised in that：The optical system
It unites as common spherical mirror, focal length≤50mm, field angle≤20 degree, minute surface are coated with infrared anti-reflection film.
6. non-contact laser railway contact line detection device according to claim 5, it is characterised in that：The semiconductor
The laser wavelength of laser tube is 850nm.
7. non-contact laser railway contact line detection device according to claim 6, it is characterised in that：The set casing
Moving trolley is installed below body.
8. non-contact laser railway contact line detection device according to claim 7, it is characterised in that：The data are defeated
The output port for going out circuit is exported using LAN interface, peak transfer rate 1000Mbps.
9. non-contact laser railway contact line detection device according to claim 8, it is characterised in that：Further include installation
It is used to protect modulation circuit, laser drive circuit, optical system, receiving circuit, demodulation and phase measurement on fixed shell top
The protective cover of circuit, semiconductor laser tube and turntable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292946.5U CN207585565U (en) | 2017-10-09 | 2017-10-09 | A kind of non-contact laser railway contact line detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292946.5U CN207585565U (en) | 2017-10-09 | 2017-10-09 | A kind of non-contact laser railway contact line detection device |
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| Publication Number | Publication Date |
|---|---|
| CN207585565U true CN207585565U (en) | 2018-07-06 |
Family
ID=62728898
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721292946.5U Withdrawn - After Issue CN207585565U (en) | 2017-10-09 | 2017-10-09 | A kind of non-contact laser railway contact line detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560578A (en) * | 2017-10-09 | 2018-01-09 | 西安明松电子科技有限公司 | A kind of non-contact laser railway contact line detection means and method |
-
2017
- 2017-10-09 CN CN201721292946.5U patent/CN207585565U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560578A (en) * | 2017-10-09 | 2018-01-09 | 西安明松电子科技有限公司 | A kind of non-contact laser railway contact line detection means and method |
| CN107560578B (en) * | 2017-10-09 | 2024-01-30 | 西安明松电子科技有限公司 | Non-contact type laser railway contact net detection device and method |
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Effective date of registration: 20210728 Address after: 710000 room 22509, unit 2, building 1, Fortune Center, Gaoxin Third Road, Lianhu District, Xi'an City, Shaanxi Province Patentee after: Xi'an Xixing Electronic Technology Co.,Ltd. Address before: 710075 Room 303, block B, 3rd floor, Chuangye building, No. 16, Gaoxin 1st Road, high tech Zone, Xi'an, Shaanxi Patentee before: XI'AN MINGSONG ELECTRONIC TECHNOLOGY Co.,Ltd. |
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