CN105301599B - The phase laser distance measurement method and device of chi is surveyed based on mixing - Google Patents
The phase laser distance measurement method and device of chi is surveyed based on mixing Download PDFInfo
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- CN105301599B CN105301599B CN201510659333.XA CN201510659333A CN105301599B CN 105301599 B CN105301599 B CN 105301599B CN 201510659333 A CN201510659333 A CN 201510659333A CN 105301599 B CN105301599 B CN 105301599B
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- chi
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- 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
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/36—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
Abstract
The invention discloses a kind of phase laser distance measurement method that chi is surveyed based on mixing, the survey chi of multiple frequencies is first mixed to get by mixing by frequency mixer and surveys chi, survey chi will be mixed by generating laser again to launch to target, a Laser Measuring chi only need to be launched, just play more effects for different frequency being surveyed chi, the emitting times of Laser Measuring chi are effectively reduced, measuring speed is improved, the target of motion also can be measured accurately.The phase laser distance measurement method of the present invention has the advantages of quickly measuring the response time, the tracking to moving target is not error-prone low with the difficulty realized.
Description
Technical field
The present invention relates to laser ranging field, and in particular to it is a kind of based on mixing survey chi phase laser distance measurement method and
Using the measurement apparatus of this method.
Background technology
The distance-finding method used in existing phase laser distance measurement product is：According to maximum ranging distance, system can be by the time-division
Mode alternately send several survey chis different resolution of ranging, then calculate every phase information survey chi respectively, and be fitted
Go out final distance.The defects of existing phase shift rangefinder method, is as follows：1）, speed it is slow, system timesharing in the way of the time-division
Different survey chis is sent, has dragged slowly measuring speed；2）, tracking error-prone to moving target survey chi be point because every
When send, in the process if target has relative motion, can cause to survey chi deviation, can finally be caused in final distance fitting
The fitting of mistake.
Based on above-described problem, the present invention propose it is a kind of it is new based on mixing survey chi phase laser distance measurement device and
Its measuring method, chi is surveyed using mixing, is once sent the method for all surveying chi, is reached the purpose quickly measured.
The content of the invention
In order to solve problem present in existing phase laser distance measurement method, it is an object of the invention to provide one kind
The phase laser distance measurement method of chi is surveyed based on mixing, and a kind of ranging dress of application phase laser distance measurement method is provided
Put.
The technical solution adopted in the present invention is：
The phase laser distance measurement method of chi is surveyed based on mixing, is comprised the following steps：
S1, as survey chi generation unit produce ranging required for multiple modulation frequency ω 1, ω 2 ... ω N；
S2, the multiple modulation frequencies obtained in step S1 are passed through to frequency mixer, generation one, which mixes, surveys chi；
S3, by the mixing obtained in step S2 survey chi be delivered to generating laser and Phase-Resolved Analysis unit respectively；
S4, generating laser survey chi according to mixing and modulate and launch laser to measuring target；
S5, laser pickoff receive the laser signal reflected through measuring target, and extract band phase delay therein
Chi signal is surveyed in the mixing of information, delivers to Phase-Resolved Analysis unit；
Mixing with phase delay information is surveyed chi signal and surveys chi with the mixing obtained in step S3 by S6, Phase-Resolved Analysis unit
It is compared, the phase delay information of each modulation frequency in chi is surveyed in parsing mixing, fits final measurement result.
As the further improvement of above-mentioned technical proposal, in above-mentioned steps S2, the frequency mixer is by each survey chi frequency
Rate ω 1, ω 2 ... ω N combine to obtain the formula for mixing survey chi：F(t)=a1*cos(ω1*t)+a2*cos(ω2*t)+…+
aN*cos(ωN*t)。
As the further improvement of above-mentioned technical proposal, in above-mentioned steps S5, first the swashing reception of the laser pickoff
Optical signal is amplified by amplifying unit, then is extracted the mixing therein with phase delay information and surveyed chi signal.
A kind of phase laser distance measurement device that chi is surveyed based on mixing, including：
Chi generation unit is surveyed, for producing multiple modulation frequencies required for ranging；
Frequency mixer, chi is surveyed for multiple modulation frequencies to be mixed to get into a mixing, and deliver to Laser emission respectively
Device and Phase-Resolved Analysis unit；
Generating laser, chi can be surveyed according to mixing and modulate and launch laser signal to measuring target；
Laser pickoff, for receiving through measuring the laser signal that reflects of target, and when extracting band phase therein
Chi signal is surveyed in the mixing for prolonging information, delivers to Phase-Resolved Analysis unit；
Phase-Resolved Analysis unit, it is compared by the way that former and later two are mixed into survey chi signal, each survey chi in chi is surveyed in parsing mixing
The phase delay information of frequency, fits final measurement result.
As the further improvement of above-mentioned technical proposal, the amplification for amplified signal is provided with the laser pickoff
Unit.
The beneficial effects of the invention are as follows：
Prior art is contrasted, is the advantages of phase laser distance measurement method of the invention：
1st, the response time is quickly measured, chi is surveyed because the survey chi of multiple frequencies is first mixed to get mixing by the present invention, then
It will be mixed by generating laser and survey chi and launch to target, only need to launch a Laser Measuring chi, just played and more different frequency is surveyed
The effect of chi, the emitting times of Laser Measuring chi are effectively reduced, improve measuring speed；
2nd, the tracking to moving target is not error-prone, because the distance-finding method of the present invention need to only launch a Laser Measuring chi,
The target of motion also can be measured accurately；
3rd, the complexity realized is low, contrasts existing range unit, range unit of the invention mainly adds frequency and mixed
The accessory of clutch, the difficulty of realization is low, and the effect of acquisition is good.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of the phase laser distance measurement device that chi is surveyed based on mixing of the present invention.
Embodiment
Reference picture 1, preferred embodiment provided by the invention, a kind of phase laser distance measurement device that chi is surveyed based on mixing,
Including surveying chi generation unit, frequency mixer, generating laser, laser pickoff and Phase-Resolved Analysis unit, in laser pickoff
It is provided with amplifying unit.The measuring method of the laser ranging system of the present invention comprises the following steps：S1, by survey chi generation unit produce
Multiple modulation frequency ω 1, ω 2 ... ω N required for raw ranging；S2, by the multiple modulation frequencies obtained in step S1 pass through frequency
Rate blender, one mixing survey chi F (t)=a1*cos (ω 1*t)+a2*cos (ω 2*t) of generation+...+aN*cos (ω N*t)；
S3, by the mixing obtained in step S2 survey chi be delivered to generating laser and Phase-Resolved Analysis unit respectively；S4, generating laser root
Chi is surveyed according to mixing to modulate and launch laser to measuring target；S5, laser pickoff receive the laser reflected through measuring target
Signal, after amplifying unit amplified signal, chi signal is surveyed in the extraction mixing therein with phase delay information, delivers to phase solution
Analyse unit；Mixing with phase delay information is surveyed chi signal and surveys chi with the mixing obtained in step S3 by S6, Phase-Resolved Analysis unit
It is compared, the phase delay information of each modulation frequency in chi is surveyed in parsing mixing, fits final measurement result.
Chi is surveyed because the survey chi of multiple frequencies is first mixed to get mixing by the present invention, then will be mixed and surveyed by generating laser
Chi is launched to target, only need to launch a Laser Measuring chi, just plays more effects for different frequency being surveyed chi, effectively reduces Laser Measuring
The emitting times of chi, improve measuring speed, and the target of motion also can be measured accurately.Therefore, phase type of the invention
Laser distance measurement method has quickly measurement response time, the tracking to moving target not error-prone and low excellent of difficulty realized
Point.
Above concrete structure and sized data are that presently preferred embodiments of the present invention is illustrated, but present invention wound
Make and be not limited to the embodiment, those skilled in the art can also make kind on the premise of without prejudice to spirit of the invention
The equivalent variations or replacement, these equivalent deformations or replacement of kind are all contained in the application claim limited range.
Claims (4)
1. the phase laser distance measurement method of chi is surveyed based on mixing, it is characterised in that comprise the following steps：
S1, as survey chi generation unit produce ranging required for multiple modulation frequency ω 1, ω 2 ... ω N；
S2, the multiple modulation frequencies obtained in step S1 are passed through to frequency mixer, generation one, which mixes, surveys chi；
S3, by the mixing obtained in step S2 survey chi be delivered to generating laser and Phase-Resolved Analysis unit respectively；
S4, generating laser survey chi according to mixing and modulate and launch laser to measuring target；
S5, laser pickoff receive the laser signal reflected through measuring target, and extract band phase delay information therein
Mixing survey chi signal, deliver to Phase-Resolved Analysis unit；
Mixing with phase delay information is surveyed chi signal and chi progress is surveyed with the mixing obtained in step S3 by S6, Phase-Resolved Analysis unit
Compare, the phase delay information of each modulation frequency in chi is surveyed in parsing mixing, fits final measurement result, above-mentioned steps S2
In, by each modulation frequency ω 1, the formula that ω 2 ... ω N combine to obtain mixing survey chi is the frequency mixer：
F (t)=a1*cos (ω 1*t)+a2*cos (ω 2*t)+...+aN*cos (ω N*t).
2. the phase laser distance measurement method according to claim 1 that chi is surveyed based on mixing, it is characterised in that：Above-mentioned steps
In S5, the laser signal of reception is first amplified by the laser pickoff by amplifying unit, then extracts band phase therein
Chi signal is surveyed in the mixing of Delay.
A kind of 3. laser ranging system of phase laser distance measurement method using described in claim 1 or 2, it is characterised in that
Including：
Chi generation unit is surveyed, for producing multiple modulation frequencies required for ranging；
Frequency mixer, for by multiple modulation frequencies be mixed to get one mixing survey chi, and deliver to respectively generating laser and
Phase-Resolved Analysis unit；
Generating laser, chi can be surveyed according to mixing and modulate and launch laser signal to measuring target；
Laser pickoff, for receiving the laser signal reflected through measuring target, and extract band phase delay letter therein
Chi signal is surveyed in the mixing of breath, delivers to Phase-Resolved Analysis unit；
Phase-Resolved Analysis unit, it is compared by the way that former and later two are mixed into survey chi signal, each modulation frequency in chi is surveyed in parsing mixing
Phase delay information, fit final measurement result.
4. laser ranging system according to claim 3, it is characterised in that：It is provided with the laser pickoff for putting
The amplifying unit of big signal.
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| CN201510659333.XA CN105301599B (en) | 2015-10-13 | 2015-10-13 | The phase laser distance measurement method and device of chi is surveyed based on mixing |
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| CN201510659333.XA CN105301599B (en) | 2015-10-13 | 2015-10-13 | The phase laser distance measurement method and device of chi is surveyed based on mixing |
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| CN105301599B true CN105301599B (en) | 2018-04-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305591A (en) * | 2011-08-17 | 2012-01-04 | 哈尔滨工业大学 | Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency |
| CN103472454A (en) * | 2012-06-07 | 2013-12-25 | 北京博新精仪科技发展有限公司 | Digital signal processing system of phase rangefinder |
| CN104459710A (en) * | 2013-09-25 | 2015-03-25 | 北京航天计量测试技术研究所 | Pulse/phase integrated laser range finder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8964169B2 (en) * | 2011-11-11 | 2015-02-24 | Mileseey Technology, Inc. | Ranging method and system |
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2015
- 2015-10-13 CN CN201510659333.XA patent/CN105301599B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305591A (en) * | 2011-08-17 | 2012-01-04 | 哈尔滨工业大学 | Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency |
| CN103472454A (en) * | 2012-06-07 | 2013-12-25 | 北京博新精仪科技发展有限公司 | Digital signal processing system of phase rangefinder |
| CN104459710A (en) * | 2013-09-25 | 2015-03-25 | 北京航天计量测试技术研究所 | Pulse/phase integrated laser range finder |
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Denomination of invention: Phase laser ranging method and device based on hybrid ruler Effective date of registration: 20211009 Granted publication date: 20180410 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN MILESEEY TECHNOLOGY Co.,Ltd. Registration number: Y2021980010441 |
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