CN109343073A - A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey - Google Patents
A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey Download PDFInfo
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- CN109343073A CN109343073A CN201811358194.7A CN201811358194A CN109343073A CN 109343073 A CN109343073 A CN 109343073A CN 201811358194 A CN201811358194 A CN 201811358194A CN 109343073 A CN109343073 A CN 109343073A
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- 238000001514 detection method Methods 0.000 title claims description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 239000000725 suspension Substances 0.000 claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000005622 photoelectricity Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000011514 reflex Effects 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/50—Systems of measurement based on relative movement of target
- G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of Laser Detecting Sets for high-speed maglev train tachometric survey, comprising: laser, optical transmitting system, receiving optics, photodetector, signal processor are electromagnetically shielded box, further includes: channel(l)ed plate.Wherein, the channel(l)ed plate, comprising: dark fringe and bright fringe.When work, laser output laser is transmitted through the fiber to optical transmitting system, and optical transmitting system will launch irradiation channel(l)ed plate after laser beam expanding with certain angle of divergence；When magnetic suspension train is advanced, successively alternating reflex laser forms the optical signal modulated to dark fringe, the bright fringe of channel(l)ed plate, optical signal enters receiving optics and convergence of rays occurs, photodetector is transmitted to through optical fiber again, photodetector completes photoelectric conversion and generates the photoelectric current modulated, and photoelectricity is streamed to signal processor, and signal processor differentiates the modulating frequency of photoelectric current, that is the alternating frequency of channel(l)ed plate light and shade striped, to extrapolate the travel speed of magnetic suspension train.
Description
Technical field
It is the present invention relates to a kind of Laser Detecting Set and detection method, in particular to a kind of for high-speed maglev train speed
Spend the Laser Detecting Set and detection method of measurement.
Background technique
Currently, scientific research institution is all in development " super high-speed rail " project both at home and abroad, to scheme further to shorten between different zones
Traffic time, be of great significance for big country vast in territory in this way of China.Fractional unit has been carried out " super at present
The test in orbit of the core component of high-speed rail " --- magnetic suspension train in these trials carries out the travel speed of train
Real-time measurement can provide parameter for train control system, and design improved foundation as train.The current means that test the speed are general
All over based on microwave or laser Doppler radar, however magnetic suspension train working method is electromagnetic drive, and train generates when moving
Extremely strong alternating magnetic field, the transmission of meeting severe jamming microwave, therefore microwave radar can not be worked normally in such occasion.Laser is more
General Le radar uses a laser as working media and can interfere to avoid high-intensity magnetic field, but laser Doppler radar is using relevant detection
System, technical difficulty is big, and cost of implementation is higher.
For this purpose, the present invention proposes a kind of Laser Detecting Set based on fringe count, it can be used for high-speed maglev train
Tachometric survey has the advantages that low cost, high reliability；The design that the device uses optical device and electronic equipment to be separated from each other
Scheme can effectively solve high-intensity magnetic field interference problem.
Summary of the invention
It is an object of that present invention to provide a kind of Laser Detecting Sets for high-speed maglev train tachometric survey, to solve
Microwave radar is not available under high-intensity magnetic field and big, the with high costs problem of laser Doppler radar technical difficulty.
In view of the above technical problems, the present invention proposes that a kind of laser acquisition for high-speed maglev train tachometric survey fills
It sets, comprising: laser (1), optical transmitting system (2), receiving optics (3), photodetector (4), signal processor
(5), box (6) are electromagnetically shielded, further includes: channel(l)ed plate (7), for being arranged in magnetic suspension train；It is characterized in that, the item
Card (7), comprising: dark fringe (8) and bright fringe (9)；Laser (1) is connect with optical transmitting system (2) by optical fiber, is received
Optical system (3) is connect with photodetector (4) by optical fiber, and signal processor (5) is connected by cable and photodetector (5)
It connects；The Laser Detecting Set calculates the travel speed of magnetic suspension train.
Preferably, the laser (1) is near infrared band semiconductor laser diode.
Preferably, the photodetector (4) is silicon photoelectric diode.
Preferably, the Laser Detecting Set calculates the travel speed of magnetic suspension train: laser (1) output laser passes through
Optical fiber is transmitted to optical transmitting system (2), and optical transmitting system (2) will launch irradiation channel(l)ed plate (7) after laser beam expanding；Magnetic
When aerotrain is advanced, successively alternating reflex laser forms the light letter modulated for dark fringe (8), the bright fringe (9) of channel(l)ed plate (7)
Number, the optical signal enters receiving optics (3) and occurs to be transmitted to photodetector (4), photodetection after convergence of rays
Device (4) completes photoelectric conversion and generates the photoelectric current modulated, and photoelectricity is streamed to signal processor (5), and signal processor (5) is sentenced
Other photoelectric current modulating frequency, to calculate the travel speed of magnetic suspension train using following formula: the calculating of train travel speed V is public
Formula are as follows: V=2d × f, d are width of fringe, and f is photoelectric current modulating frequency.
Preferably, the photoelectric current modulating frequency is the alternating frequency of channel(l)ed plate light and shade striped.
Preferably, the dark fringe (8) is material with low reflective rate.
Preferably, the bright fringe (9) is high reflecting material.
Preferably, laser (1), photodetector (4) and signal processor (5) are fixedly mounted on electromagnetic shielding box (6)
It is interior.
Preferably, electromagnetic shielding box (6) is can.
Preferably, optical transmitting system (2), receiving optics (3) are placed in electromagnetic shielding box (6) outside.
Preferably, channel(l)ed plate (7) is fixedly mounted on magnetic suspension train, the width phase of dark fringe (8) and bright fringe (9)
Together.
The present invention also proposes a kind of detection method of Laser Detecting Set for high-speed maglev train tachometric survey,
It is characterized in that, the Laser Detecting Set calculates the travel speed of magnetic suspension train: laser (1) exports laser and passed by optical fiber
It transports to optical transmitting system (2), optical transmitting system (2) will launch irradiation channel(l)ed plate (7) after laser beam expanding；Magnetic suspension column
Garage into when, successively alternating reflex laser forms the optical signal modulated, institute for the dark fringe (8) of channel(l)ed plate (7), bright fringe (9)
It states after optical signal enters receiving optics (3) generation convergence of rays and is transmitted to photodetector (4), photodetector (4)
It completes photoelectric conversion and generates the photoelectric current modulated, photoelectricity is streamed to signal processor (5), and signal processor (5) differentiates light
Current modulation frequency, to calculate the travel speed of magnetic suspension train using following formula: the calculation formula of train travel speed V
Are as follows: V=2d × f, d are width of fringe, and f is photoelectric current modulating frequency.
Detailed description of the invention
Fig. 1 is the schematic diagram of the Laser Detecting Set for high-speed maglev train tachometric survey of the invention.
1. 5. signal processor of laser 2. optical transmitting system, 3. receiving optics, 4. photodetector, 6. electricity
7. channel(l)ed plate of magnetic screen box, 8. dark fringe, 9. bright fringe
Specific embodiment
Detailed description of the preferred embodiments with reference to the accompanying drawing.
Such as Fig. 1, a kind of Laser Detecting Set for high-speed maglev train tachometric survey of the invention, comprising: laser
Device 1, optical transmitting system 2, receiving optics 3, photodetector 4, signal processor 5 are electromagnetically shielded box 6, further includes: item
Card 7.Wherein, the channel(l)ed plate 7, comprising: dark fringe 8 and bright fringe 9.Channel(l)ed plate 7 is fixedly mounted on magnetic suspension train,
Dark fringe 8 and bright fringe 9 it is of same size.Dark fringe 8 is material with low reflective rate.Bright fringe 9 is high reflecting material.
Wherein, laser 1, photodetector 4 and signal processor 5 are fixedly mounted in electromagnetic shielding box 6, electromagnetic shielding
Box 6 can be can, and optical transmitting system 2, receiving optics 3 are placed in outside electromagnetic shielding box 6.Laser 1 and transmitting light
System 2 is connected by optical fiber, and receiving optics 3 is connect with photodetector 4 by optical fiber, and signal processor 5 passes through line
Cable is connect with photodetector 4.Wherein, laser 1 can be near infrared band semiconductor laser diode.Photodetector 4 can
For silicon photoelectric diode.
When the Laser Detecting Set works, laser 1 exports laser and is transmitted through the fiber to optical transmitting system 2, sends out
Irradiation channel(l)ed plate 7 will be launched after laser beam expanding with certain angle of divergence by penetrating optical system 2；When magnetic suspension train is advanced, striped
Successively alternating reflex laser forms the optical signal modulated to dark fringe 8, the bright fringe 9 of plate, and optical signal enters receiving optics 3
Convergence of rays occurs, then is transmitted to photodetector 4 through optical fiber, photodetector 4 completes photoelectric conversion and generates the light modulated
Electric current, photoelectricity are streamed to signal processor 5, and signal processor 5 differentiates the modulating frequency of photoelectric current, i.e. channel(l)ed plate light and shade striped
Alternating frequency, to extrapolate the travel speed of magnetic suspension train.Electromagnetic shielding box 6 plays protection to the electronic component in box
Effect.
The calculation formula of train travel speed V are as follows:
V=2d × f,
D is width of fringe, and f is photoelectric current modulating frequency.
Laser Detecting Set of the invention have technically simple, at low cost, reliable performance, can anti-high-intensity magnetic field interference etc. it is excellent
Point.
Claims (12)
1. a kind of Laser Detecting Set for high-speed maglev train tachometric survey, comprising: laser (1) emits optical system
It unites (2), receiving optics (3), photodetector (4), signal processor (5), electromagnetic shielding box (6), further includes: channel(l)ed plate
(7), for being arranged in magnetic suspension train；
It is characterized in that, the channel(l)ed plate (7), comprising: dark fringe (8) and bright fringe (9)；
Laser (1) is connect with optical transmitting system (2) by optical fiber, and receiving optics (3) passes through with photodetector (4)
Optical fiber connection, signal processor (5) are connect by cable with photodetector (5)；
The Laser Detecting Set calculates the travel speed of magnetic suspension train.
2. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1, feature
It is, the laser (1) is near infrared band semiconductor laser diode.
3. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1, feature
It is, the photodetector (4) is silicon photoelectric diode.
4. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1, feature
It is, the Laser Detecting Set calculates the travel speed of magnetic suspension train: laser (1) output laser is transmitted through the fiber to
Optical transmitting system (2), optical transmitting system (2) will launch irradiation channel(l)ed plate (7) after laser beam expanding；Magnetic suspension train row
Into when, successively alternating reflex laser forms the optical signal modulated, the light for the dark fringe (8) of channel(l)ed plate (7), bright fringe (9)
Signal enters receiving optics (3) and occurs to be transmitted to photodetector (4) after convergence of rays, and photodetector (4) is completed
Photoelectric conversion generates the photoelectric current modulated, and photoelectricity is streamed to signal processor (5), and signal processor (5) differentiates photoelectric current
Modulating frequency, to calculate the travel speed of magnetic suspension train using following formula:
The calculation formula of train travel speed V are as follows: V=2d × f,
D is width of fringe, and f is photoelectric current modulating frequency.
5. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 4, feature
It is, the photoelectric current modulating frequency is the alternating frequency of channel(l)ed plate light and shade striped.
6. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1 or 4, special
Sign is that the dark fringe (8) is material with low reflective rate.
7. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1 or 4, special
Sign is that the bright fringe (9) is high reflecting material.
8. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1 or 4, special
Sign is that laser (1), photodetector (4) and signal processor (5) are fixedly mounted in electromagnetic shielding box (6).
9. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 8, feature
It is, electromagnetic shielding box (6) is can.
10. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1 or 4,
It is characterized in that, optical transmitting system (2), receiving optics (3) are placed in electromagnetic shielding box (6) outside.
11. a kind of Laser Detecting Set for high-speed maglev train tachometric survey according to claim 1 or 4,
Be characterized in that, channel(l)ed plate (7) is fixedly mounted on magnetic suspension train, dark fringe (8) and bright fringe (9) it is of same size.
12. a kind of detection of the Laser Detecting Set according to claim 1 for high-speed maglev train tachometric survey
Method, which is characterized in that the Laser Detecting Set calculates the travel speed of magnetic suspension train: it is logical that laser (1) exports laser
It crosses optical fiber to be transmitted to optical transmitting system (2), optical transmitting system (2) will launch irradiation channel(l)ed plate (7) after laser beam expanding；
When magnetic suspension train is advanced, successively alternating reflex laser forms the light modulated for dark fringe (8), the bright fringe (9) of channel(l)ed plate (7)
Signal, the optical signal enter receiving optics (3) and occur to be transmitted to photodetector (4) after convergence of rays, and photoelectricity is visited
It surveys device (4) and completes the photoelectric current that photoelectric conversion generation is modulated, photoelectricity is streamed to signal processor (5), signal processor (5)
Differentiate photoelectric current modulating frequency, to calculate the travel speed of magnetic suspension train using following formula:
The calculation formula of train travel speed V are as follows: V=2d × f,
D is width of fringe, and f is photoelectric current modulating frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811358194.7A CN109343073A (en) | 2018-11-15 | 2018-11-15 | A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811358194.7A CN109343073A (en) | 2018-11-15 | 2018-11-15 | A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721960A (en) * | 2019-03-20 | 2020-09-29 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Laser speed measurement positioning device and method for ultrahigh-speed magnetic suspension train |
| CN113291354A (en) * | 2020-02-24 | 2021-08-24 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Superspeed maglev train positioning and speed measuring system based on m-sequence coding |
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| CN111721960A (en) * | 2019-03-20 | 2020-09-29 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Laser speed measurement positioning device and method for ultrahigh-speed magnetic suspension train |
| CN113291354A (en) * | 2020-02-24 | 2021-08-24 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Superspeed maglev train positioning and speed measuring system based on m-sequence coding |
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