CN105738914A - Novel vehicle-mounted velocity measurement apparatus - Google Patents
Novel vehicle-mounted velocity measurement apparatus Download PDFInfo
- Publication number
- CN105738914A CN105738914A CN201410763212.5A CN201410763212A CN105738914A CN 105738914 A CN105738914 A CN 105738914A CN 201410763212 A CN201410763212 A CN 201410763212A CN 105738914 A CN105738914 A CN 105738914A
- Authority
- CN
- China
- Prior art keywords
- module
- laser
- velocity measurement
- condenser lens
- novel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention belongs to the technical field of non-contact test metering, and specifically provides a novel vehicle-mounted velocity measurement apparatus. The apparatus comprises a laser generation apparatus (1), a first condenser (2), a second condenser (3), a photomultiplier (4), an AD sampling module (5), a tracking filter module (6), a digital correlator module (7), a Fourier transformation module (8), a frequency spectrum refinement module (9) and a speed information output module (10). The apparatus provided by the invention solves the disadvantages and problems of error accumulation, poor dynamic response capability and the like existing in a conventional velocity measurement mode in the prior art, belongs to a non-contact measurement technology, does not cause interference to a measurement object, and has the advantages of high velocity measurement precision, good space resolution, wide velocity measurement scope, fast dynamic response speed and the like.
Description
Technical field
The invention belongs to non-contact testing field of measuring techniques, it is specifically related to a kind of novel on-vehicle speed measuring device, there is the shortcoming problem such as error accumulation, dynamic response capability difference in the mode of testing the speed in prior art that solves, belongs to non-contact measuring technology, and to measuring, target is noiseless.The features such as having rate accuracy height, spatial resolution is good, and the scope that tests the speed is wide, rapid dynamic response speed.
Background technology
Along with developing rapidly of modern project technology, the particularly development of the technology such as Aeronautics and Astronautics, machine-building, it is necessary to the movement velocity of object is carried out high-acruracy survey.At present, onboard navigation system obtains the mode of linear velocity parameter mainly three kinds of accelerometers, global positioning system (GlobalPositionSystem, GPS) and speedometer, and these three tests the speed the shortcoming that mode all exists self.Accelerometer is measured by mass body due to it, there is the error term affected by overload；The error term measured is more, it is necessary to be modified through complicated calculating；Needing from start to finish to carry out Continuous plus, its error is accumulation.The system of the non-autonomous formula of GPS, it is impossible to be assemblied in the operational weapon of army；Frequency band is narrow, and when carrier makes the high motion of automobile, code ring and the easy losing lock of carrier wave circumpolar of receiver and lossing signal, thus completely losing homing capability；Dynamic response capability is poor, be subject to electronic interferences and signal is easily blocked.Speedometer is affected relatively big by ground environment, and wheel hop, skidding and deformation all can bring error to measurement；Wheel circumference is by the impact of the factors such as tyre temperature, the blowing pressure and surface abrasion, and the change of the calibration factor of speedometer, up to 1%, restricts its rate accuracy, it is therefore necessary to carry out real-time calibration in each use procedure.
For the problems referred to above, one novel on-vehicle speed measuring device of the present invention, it utilizes the linear relationship of frequency displacement that laser doppler produces and speed, the vehicle type carrier movement velocity relative to ground is extrapolated by detecting Doppler frequency shift, accurate speed parameter is provided for navigation system, belonging to non-contact measuring technology, to measuring, target is noiseless.The features such as having rate accuracy height, spatial resolution is good, and the scope that tests the speed is wide, rapid dynamic response speed.
Summary of the invention
It is an object of the invention to overcome the mode of testing the speed in prior art to there is the shortcoming problem such as error accumulation, dynamic response capability difference.
For this, the invention provides a kind of novel on-vehicle speed measuring device, including: generating device of laser, first condenser lens, second condenser lens, photomultiplier tube, AD sampling module, tracking filter module, digital correlator module, Fourier transformation module, frequency spectrum refinement module, velocity information output module, wherein, first condenser lens is arranged on the laser head front end of generating device of laser, second condenser lens is arranged on the front end of photomultiplier tube, photomultiplier tube is connected to tracking filter module by AD sampling module, tracking filter module is connected to Fourier transformation module by digital correlator module, Fourier transformation module is connected to velocity information output module by frequency spectrum refinement module.
Above-mentioned a kind of novel on-vehicle speed measuring device, it is characterised in that: generating device of laser includes Laser Power Devices, laser instrument, cooler.
Above-mentioned a kind of novel on-vehicle speed measuring device, it is characterised in that: avalanche diode module at a high speed selected by photomultiplier tube.
Beneficial effects of the present invention: this novel on-vehicle speed measuring device provided by the invention, including: generating device of laser, first condenser lens, second condenser lens, photomultiplier tube, AD sampling module, tracking filter module, digital correlator module, Fourier transformation module, frequency spectrum refinement module, velocity information output module, wherein, first condenser lens is arranged on the laser head front end of generating device of laser, second condenser lens is arranged on the front end of photomultiplier tube, photomultiplier tube is connected to tracking filter module by AD sampling module, tracking filter module is connected to Fourier transformation module by digital correlator module, Fourier transformation module is connected to velocity information output module by frequency spectrum refinement module.The features such as one novel on-vehicle speed measuring device of the present invention, has rate accuracy height, and spatial resolution is good, and the scope that tests the speed is wide, rapid dynamic response speed.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is a kind of novel on-vehicle speed measuring device schematic diagram.
Description of reference numerals: 1, generating device of laser, the 2, first condenser lens, 3, second condenser lens, 4, photomultiplier tube, 5, AD sampling module, 6, tracking filter module, 7, digital correlator module, 8, Fourier transformation module, 9, frequency spectrum refinement module, 10, velocity information output module.
Detailed description of the invention
Embodiment 1
If Fig. 1 is a kind of novel on-vehicle speed measuring device, it is characterized in that including: generating device of laser 1, first condenser lens 2, second condenser lens 3, photomultiplier tube 4, AD sampling module 5, tracking filter module 6, digital correlator module 7, Fourier transformation module 8, frequency spectrum refinement module 9, velocity information output module 10, wherein, first condenser lens 11 is arranged on the laser head front end of generating device of laser 1, second condenser lens 3 is arranged on the front end of photomultiplier tube 4, photomultiplier tube 4 is connected to tracking filter module 6 by AD sampling module 5, tracking filter module 6 is connected to Fourier transformation module 8 by digital correlator module 7, Fourier transformation module 8 is connected to velocity information output module 10 by frequency spectrum refinement module 9.In use procedure, generating device of laser launches laser, and laser multiplier tube detection scattered light signal, by amplifying signal processing, Doppler frequency detection module, it is possible to detection Doppler frequency, has rate accuracy height, the features such as spatial resolution is good, and the scope that tests the speed is wide, rapid dynamic response speed.
Embodiment 2
nullOn the basis of embodiment 1，A kind of novel on-vehicle speed measuring device，Generating device of laser 1 includes Laser Power Devices，Laser instrument，Cooler，Doppler measurement system is higher to the requirement of light source,Owing to light need to get to measured object through beam splitter,There is the optical energy loss of nearly 30% period,And the amplitude of Beat Signal is directly proportional to the amplitude product of the two-beam participating in beat,Therefore improve the intensity of optical signal,Being conducive to improving signal to noise ratio and signal processing can being simplified. this embodiment light channel structure selects line polarized light He-Ne laser instrument as light source,The angle of divergence is 1.3mrad,Wavelength is 632.8 nanometers,Luminous point is little,Light intensity is concentrated,And there is coherence,Monochromaticity is good,High directivity and brightness advantages of higher,Measurement requirement can be met,This light channel structure adopts a beam splitter prism and two reflecting prisms realize light splitting，Polaroid makes laser become polarized light,Then after beam splitter prism,It is divided into the light that two bundle directions are different,Then reflect through two reflecting prisms respectively,Last two-beam converges and irradiates surface of moving object to be measured for a bit,High-power continuing is conducive to launch laser.
Embodiment 3
On the basis of embodiment 1, a kind of novel on-vehicle speed measuring device, owing to the light accepted is fainter, photodetector adopts avalanche diode, and avalanche diode is by internal gain, and gain is up to 102One 104It, be utilize photodetector avalanche multiplication effect occurring and make under the reverse biased of snowslide Guan Gao.The reverse bias of general photodiode is below tens volts, and the reverse bias of APD is typically in hundreds of width magnitude.When APD works under high-V alloy, electric field in potential barrier is very strong, electronics and hole obtain very big kinetic energy when doing drift motion in barrier region " they collide with lattice atoms in barrier region, and valence electron/electrons can be energized into conduction band, form electronics one hole pair; APD radiosusceptibility: 0.5A/W; APD gain: 30, adopt operational amplification circuit in addition, and the bandwidth of operational amplifier is from 4K to 100M; gain is 6200V/A, is so conducive to detectable signal.
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (3)
1. a novel on-vehicle speed measuring device, it is characterized in that including: generating device of laser (1), first condenser lens (2), second condenser lens (3), photomultiplier tube (4), AD sampling module (5), tracking filter module (6), digital correlator module (7), Fourier transformation module (8), frequency spectrum refinement module (9), velocity information output module (10), wherein, first condenser lens (2) is arranged on the laser head front end of generating device of laser (1), second condenser lens (3) is arranged on the front end of photomultiplier tube (4), photomultiplier tube (4) is connected to track filter module (6) by AD sampling module (5),
Track filter module (6) is connected to Fourier transformation module (8) by digital correlator module (7),
Fourier transformation module (8) is connected to velocity information output module (10) by frequency spectrum refinement module (9).
2. a kind of novel on-vehicle speed measuring device as claimed in claim 1, it is characterised in that: generating device of laser (1) includes Laser Power Devices, laser instrument, cooler.
3. a kind of novel on-vehicle speed measuring device as claimed in claim 1, it is characterised in that: avalanche diode module at a high speed selected by photomultiplier tube (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763212.5A CN105738914A (en) | 2014-12-12 | 2014-12-12 | Novel vehicle-mounted velocity measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763212.5A CN105738914A (en) | 2014-12-12 | 2014-12-12 | Novel vehicle-mounted velocity measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105738914A true CN105738914A (en) | 2016-07-06 |
Family
ID=56241140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410763212.5A Withdrawn CN105738914A (en) | 2014-12-12 | 2014-12-12 | Novel vehicle-mounted velocity measurement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105738914A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113554766A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage metering supervision method and supervision system |
| CN113554765A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage supervision method and system based on GPS positioning |
| CN113556683A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage supervision method and system based on shared network |
-
2014
- 2014-12-12 CN CN201410763212.5A patent/CN105738914A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113554766A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage metering supervision method and supervision system |
| CN113554765A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage supervision method and system based on GPS positioning |
| CN113556683A (en) * | 2021-06-15 | 2021-10-26 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage supervision method and system based on shared network |
| CN113556683B (en) * | 2021-06-15 | 2023-12-01 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Taxi mileage supervision method and supervision system based on shared network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7414708B2 (en) | Interferometric Rayleigh scattering measurement system | |
| US6031601A (en) | Code-space optical electronic distance meter | |
| US9188677B2 (en) | Imaging doppler lidar for wind turbine wake profiling | |
| Zhou et al. | A novel laser Doppler velocimeter and its integrated navigation system with strapdown inertial navigation | |
| US11243307B2 (en) | Method for processing a signal from a coherent lidar in order to reduce noise and related lidar system | |
| EP3218741B1 (en) | System and method for measuring doppler effect utilizing elastic and inelastic light scattering | |
| US20150077735A1 (en) | Device for determining wind speed comprising a plurality of laser sources | |
| CN102798850B (en) | Rayleigh-Doppler laser radar ground calibration system | |
| CN108802425A (en) | A kind of airborne measuring wind speed laser radar system | |
| CN103076611B (en) | Method and device for measuring speed and distance by coherent detecting laser | |
| CN105738914A (en) | Novel vehicle-mounted velocity measurement apparatus | |
| CN103900681A (en) | Scanning laser vibration measurement system | |
| CN110940992B (en) | Signal detection method and system capable of improving detection distance and precision of laser radar | |
| Xiao et al. | A continuous wavelet transform-based modulus maxima approach for the walk error compensation of pulsed time-of-flight laser rangefinders | |
| CN102590822B (en) | Chirped modulation mechanism-based laser radar | |
| CN204359933U (en) | A kind of novel on-vehicle speed measuring device | |
| CN203720351U (en) | Laser radar measuring instrument for measuring object angles and angular velocities accurately | |
| CN113447946A (en) | Micro Doppler information measuring system for weak laser echo signals | |
| CN111751834A (en) | High-speed high-precision dynamic ranging method based on optical frequency modulation interference and single-frequency interference | |
| CN112882062B (en) | Space based CO 2 Flux laser detection device | |
| CN219435047U (en) | Pulse laser Doppler velocimeter for measuring low-altitude flying carrier speed | |
| CN205982626U (en) | System of testing speed based on two etalons | |
| Bruneau et al. | Operation of the Airborne 355-nm High Spectral Resolution and Doppler Lidar LNG | |
| US20230131584A1 (en) | Multi-tone continuous wave detection and ranging | |
| CN116299520A (en) | Pulse laser Doppler velocimeter for measuring low-altitude flying carrier speed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160706 |
|
| WW01 | Invention patent application withdrawn after publication |