CN107015232A - The device and method of the range measurement of target object is realized using coherent laser difference frequency - Google Patents
The device and method of the range measurement of target object is realized using coherent laser difference frequency Download PDFInfo
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- CN107015232A CN107015232A CN201710197966.2A CN201710197966A CN107015232A CN 107015232 A CN107015232 A CN 107015232A CN 201710197966 A CN201710197966 A CN 201710197966A CN 107015232 A CN107015232 A CN 107015232A
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- frequency
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- target object
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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
Abstract
The device and method of the range measurement of target object is realized the invention discloses a kind of utilization coherent laser difference frequency, including this oscillator, master oscillator, modulation and transmitter module, photoelectricity amplification module, first frequency mixer, second frequency mixer, survey is mutually counted, target to be measured and display, master oscillator is connected with modulation with transmitter module, the output end of this oscillator is respectively with first, the input connection of two frequency mixers, photoelectricity amplification module is connected with the second frequency mixer, first frequency mixer, second frequency mixer respectively successively with frequency-selective amplifier, comparator, microprocessor is mutually counted in survey, display is connected；The signal of the present invention is changed into after low frequency from high frequency, and its cycle will expand several ten times larger or even thousands of times, and the precision for so allowing for surveying phase is greatly improved.
Description
Technical field
The present invention relates to a kind of device and method of measurement distance, more particularly to one kind mesh is realized using coherent laser difference frequency
Mark the device and method of the range measurement of object.
Background technology
Laser has the characteristic that normal light can not compare, such as high coherence, height monochromaticjty, high directivity, brightness
Height, these characteristics make it before many aspects such as industry, agricultural, medical science, national defense construction, scientific experiment have a wide range of applications
Wherein, laser ranging is exactly concrete application of the laser technology in fields such as military, industry, mapping or even Modern Physical Educations to scape,
And in phase laser distance measurement, if carry out phase measurement direct to high-frequency signal, its error is often very big.
The content of the invention
It is relevant sharp it is an object of the invention to provide a kind of utilization that can greatly improve phase-measurement accuracy to overcome disadvantages mentioned above
Equation of light frequency realizes the device and method of the range measurement of target object.
In order to reach object above, the technical solution adopted by the present invention is：One kind realizes target using coherent laser difference frequency
The device of the range measurement of object, including this oscillator, master oscillator, modulation and transmitter module, photoelectricity amplification module, first mix
Frequency device, the second frequency mixer, mutually meter, target to be measured and display are surveyed, the master that the master oscillator is produced shakes signal through ovennodulation
Launch multiple laser with transmitter module, the multiple laser is transmitted on the reflective mirror of target to be measured, and amplifies mould by photoelectricity
Block, which is received, produces photoelectricity amplified signal, and the output end of the master oscillator is connected with the input of modulation and transmitter module, described
The output end of this oscillator is connected with the input of first and second frequency mixer respectively, the output end of the photoelectricity amplification module and the
The input connection of two frequency mixers, described oscillator is to produce multichannel local oscillation signal, which part local oscillation signal and photoelectricity
Amplified signal can be carried out mixing by the second frequency mixer and produce measurement signal, the master that the master oscillator is produced shake signal and remaining
Local oscillation signal can pass through the first frequency mixing module and produce reference signal, first frequency mixer, the output end point of the second frequency mixer
It is not connected with the input of frequency-selective amplifier, the input of the output ends of two frequency-selectors respectively with a comparator is connected,
The output end of each comparator be connected with surveying the input mutually counted, output end that the survey is mutually counted and microprocessor it is defeated
Enter end connection, the output end of the microprocessor is connected with display.
The beneficial effects of the invention are as follows, high-frequency signal is converted into being easy to the low frequency signal of processing, and the low frequency after changing
Signal still remains the phase information of former high-frequency signal, then carries out survey phase to low frequency signal again, and signal is changed into low frequency from high frequency
Afterwards, its cycle will expand several ten times larger or even thousands of times, and the precision for so allowing for surveying phase is greatly improved.
Preferably, mutually meter is mutually counted to be surveyed using automatic digital using TDC-GP1 chips or the survey and mutually counted for the survey, it is described from
Dynamic numeral is surveyed mutually is connected with counter between meter and microprocessor.
Preferably, first and second frequency mixing module is used as mixing device using analog multiplier MC1496.It is simple in construction, performance
It is stable, there is the gain that can be adjusted, signal excursion is wide, power consumption is low, suppress with good carrier wave.
It is as a further improvement on the present invention, if the modulated light wave signal reflected from measured target, if directly right
Optical signal is handled to obtain phase difference, it is more difficult to realized, in order to solve this problem, then anti-from the reflective mirror of target to be measured
The modulated light wave signal penetrated is received by photoelectricity amplification module again by photodetector, and the photodetector is photomultiplier transit
One kind in pipe, photocell, photo resistance, photodiode, phototriode.Photodetector will detect reception faint light
Signal is converted into signal, to facilitate the processing followed by electric signal.
Preferably, in addition to objective lens, the objective lens include convex lens, concavees lens, the central hole of the concavees lens
Through hole is provided with, the through hole can pass through for light source, and dark paint is coated with the through-hole wall.Launch from principal oscillation device
Light source from objective lens directive determine target reflective mirror transmitting when, light source from the through hole of concavees lens from convex lens project, reduce
Influence of the circular error to range accuracy.
A kind of method that utilization coherent laser difference frequency realizes the range measurement of target object, utilizes above-mentioned utilization coherent laser
Difference frequency realizes the device of the range measurement of target object, and the master that master oscillator is produced shakes signal through ovennodulation and transmitter module transmitting
Multiple laser, the multiple laser is transmitted on the reflective mirror of target to be measured, and the tune reflected is received by photoelectricity amplification module
Lightwave signal processed, and produce photoelectricity amplified signal, described oscillator produce wherein local oscillation signal amplifies with photoelectricity and believed all the way
Number carrying out mixing by the second frequency mixer produces measurement signal, and the master that the master oscillator the is produced signal that shakes is produced with this oscillator
Another road local oscillation signal produce reference signal by the first frequency mixing module, the measurement signal and reference signal are respectively through choosing
Audio amplifier, comparator, eventually pass through survey and mutually count, distance is shown from display.The beneficial effects of the invention are as follows using difference
Frequency surveys phase so that improve measurement accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of the device for the range measurement that the present embodiment realizes target object using coherent laser difference frequency
Figure.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Referring to shown in accompanying drawing 1, a kind of utilization coherent laser difference frequency in the present embodiment realizes the range measurement of target object
Device, including this oscillator, master oscillator, modulation and transmitter module, photoelectricity amplification module, the first frequency mixer, second mixing
Device, survey mutually meter, target to be measured and display, the master that master oscillator the is produced signal that shakes launches multi beam through ovennodulation and transmitter module
Laser, multiple laser is transmitted on the reflective mirror of target to be measured, and receives generation photoelectricity amplified signal by photoelectricity amplification module,
The output end of master oscillator is connected with modulation with the input of transmitter module respectively, the output end of this oscillator respectively with first,
The input connection of two frequency mixers, first and second frequency mixing module is used as mixing device, photoelectricity amplification using analog multiplier MC1496
The output end of module is connected with the input of the second frequency mixer, and this oscillator is to produce multichannel local oscillation signal, which part sheet
Signal and the photoelectricity amplified signal of shaking can be carried out mixing by the second frequency mixer and produce measurement signal, and the master that master oscillator is produced shakes letter
Number with remaining local oscillation signal can pass through the first frequency mixing module produce reference signal, the first frequency mixer, the output of the second frequency mixer
End is connected with the input of frequency-selective amplifier respectively, and the input of the output ends of two frequency-selectors respectively with a comparator is connected,
The output end of each comparator is connected with surveying the input mutually counted respectively, is surveyed mutually meter and is used TDC-GP1 chips or using automatic number
Word is surveyed and mutually counted, and the input for surveying the output end mutually counted and microprocessor is connected, and automatic digital is surveyed mutually to be connected between meter and microprocessor
Counter is connected to, the output end of microprocessor is connected with display.
The modulated light wave signal reflected from the reflective mirror of target to be measured is by photodetector again by photoelectricity amplification module
Receive, photodetector is one kind in photomultiplier, photocell, photo resistance, photodiode, phototriode.
Also include objective lens, objective lens include convex lens, concavees lens, and the central hole of concavees lens is provided with through hole, through hole
It can pass through for light source, dark paint is coated with through-hole wall.
A kind of method that utilization coherent laser difference frequency realizes the range measurement of target object, swashs using above-mentioned utilization is relevant
Equation of light frequency realizes the device of the range measurement of target object, and the master that master oscillator is produced shakes signal through ovennodulation and transmitter module hair
Multiple laser is penetrated, multiple laser is transmitted on the reflective mirror of target to be measured, and the modulation reflected is received by photoelectricity amplification module
Lightwave signal, and produce photoelectricity amplified signal, this oscillator produce wherein local oscillation signal passes through with photoelectricity amplified signal all the way
Second frequency mixer carries out mixing and produces measurement signal, and the master that master oscillator is produced shakes another road sheet that signal and this oscillator are produced
The signal that shakes by the first frequency mixing module produce reference signal, measurement signal with reference signal respectively through frequency-selective amplifier, compared
Device, eventually passes through survey and mutually counts, distance is shown from display.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands present disclosure and is carried out, and it is not intended to limit the scope of the present invention, all according to spirit of the invention
The equivalent change or modification that essence is done, should all cover within the scope of the present invention.
Claims (7)
1. a kind of utilization coherent laser difference frequency realizes the device of the range measurement of target object, it is characterised in that：Including this vibration
Device, master oscillator, modulation and transmitter module, photoelectricity amplification module, the first frequency mixer, the second frequency mixer, survey mutually meter, target to be measured
And display, the master that the master oscillator the is produced signal that shakes launches multiple laser, the multi beam through ovennodulation and transmitter module
Laser is transmitted on the reflective mirror of target to be measured, and receives generation photoelectricity amplified signal by photoelectricity amplification module, and the master shakes
The output end for swinging device is connected with the input of modulation and transmitter module, and the output end of described oscillator is mixed with first and second respectively
The input connection of frequency device, the output end of the photoelectricity amplification module is connected with the input of the second frequency mixer, described vibration
Device can be mixed to produce multichannel local oscillation signal, which part local oscillation signal with photoelectricity amplified signal by the second frequency mixer
Produce measurement signal, the master that the master oscillator the is produced signal that shakes can be produced with remaining local oscillation signal by the first frequency mixing module
Reference signal, first frequency mixer, the output end of the second frequency mixer are connected with the input of frequency-selective amplifier respectively, two institutes
State input of the output end of frequency-selector respectively with a comparator to be connected, the output end of each comparator is with surveying what is mutually counted
Input is connected, the input connection for surveying the output end mutually counted and microprocessor, and the output end of the microprocessor is with showing
Show that device is connected.
2. utilization coherent laser difference frequency according to claim 1 realizes the device of the range measurement of target object, its feature
It is：Mutually meter uses TDC-GP1 chips for the survey.
3. utilization coherent laser difference frequency according to claim 1 realizes the device of the range measurement of target object, its feature
It is：Mutually meter is mutually counted using automatic digital survey for the survey, and the automatic digital is surveyed mutually is connected with counting between meter and microprocessor
Device.
4. utilization coherent laser difference frequency according to claim 1 realizes the device of the range measurement of target object, its feature
It is：First and second frequency mixing module is used as mixing device using analog multiplier MC1496.
5. utilization coherent laser difference frequency according to claim 1 realizes the device of the range measurement of target object, its feature
It is：The modulated light wave signal reflected from the reflective mirror of target to be measured is connect by photoelectricity amplification module again by photodetector
Receive, the photodetector is one kind in photomultiplier, photocell, photo resistance, photodiode, phototriode.
6. utilization coherent laser difference frequency according to claim 1 realizes the device of the range measurement of target object, its feature
It is：Also include objective lens, the objective lens include convex lens, concavees lens, and the central hole of the concavees lens is provided with through hole,
The through hole can pass through for light source, and dark paint is coated with the through-hole wall.
7. a kind of method that utilization coherent laser difference frequency realizes the range measurement of target object, any one of exploitation right 1-6 profit
The device of the range measurement of target object is realized with coherent laser difference frequency, it is characterised in that：The master that master oscillator is produced shakes signal
Launch multiple laser through ovennodulation and transmitter module, the multiple laser is transmitted on the reflective mirror of target to be measured, and by light
Electrically amplified module receives the modulated light wave signal of reflection, and produces photoelectricity amplified signal, wherein the one of described oscillator generation
Road local oscillation signal carries out mixing by the second frequency mixer with photoelectricity amplified signal and produces measurement signal, what the master oscillator was produced
Another road local oscillation signal that the main signal that shakes is produced with this oscillator produces reference signal, the measurement letter by the first frequency mixing module
Number with reference signal respectively through frequency-selective amplifier, comparator, eventually pass through survey mutually count, distance is shown from display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710197966.2A CN107015232A (en) | 2017-03-29 | 2017-03-29 | The device and method of the range measurement of target object is realized using coherent laser difference frequency |
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| CN201710197966.2A CN107015232A (en) | 2017-03-29 | 2017-03-29 | The device and method of the range measurement of target object is realized using coherent laser difference frequency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169755A (en) * | 2017-12-14 | 2018-06-15 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of High Precision Long-distance laser range finder and distance measuring method |
| WO2019237911A1 (en) * | 2018-06-11 | 2019-12-19 | 深圳市镭神智能系统有限公司 | Light emitting module, light emitting unit, light signal detection module, optical system and laser radar system |
| CN111474551A (en) * | 2020-06-01 | 2020-07-31 | 陕西高速星展科技有限公司 | FPGA-based laser phase ranging system and method |
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| CN101158572A (en) * | 2007-10-31 | 2008-04-09 | 大连海事大学 | Frequency division multiplexing type paralleling laser length measuring instrument |
| CN201514481U (en) * | 2009-09-23 | 2010-06-23 | 伊玛精密电子（苏州）有限公司 | Laser range finder |
| CN101865997A (en) * | 2010-05-26 | 2010-10-20 | 北京握奇数据系统有限公司 | Laser distance measuring equipment and method |
| CN102901970A (en) * | 2012-11-08 | 2013-01-30 | 天津理工大学 | Single-modulation continuous wave laser ranging device and method |
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2017
- 2017-03-29 CN CN201710197966.2A patent/CN107015232A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101158572A (en) * | 2007-10-31 | 2008-04-09 | 大连海事大学 | Frequency division multiplexing type paralleling laser length measuring instrument |
| CN201514481U (en) * | 2009-09-23 | 2010-06-23 | 伊玛精密电子（苏州）有限公司 | Laser range finder |
| CN101865997A (en) * | 2010-05-26 | 2010-10-20 | 北京握奇数据系统有限公司 | Laser distance measuring equipment and method |
| CN102901970A (en) * | 2012-11-08 | 2013-01-30 | 天津理工大学 | Single-modulation continuous wave laser ranging device and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169755A (en) * | 2017-12-14 | 2018-06-15 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of High Precision Long-distance laser range finder and distance measuring method |
| WO2019237911A1 (en) * | 2018-06-11 | 2019-12-19 | 深圳市镭神智能系统有限公司 | Light emitting module, light emitting unit, light signal detection module, optical system and laser radar system |
| US11726180B2 (en) | 2018-06-11 | 2023-08-15 | Leishen Intelligent System Co., Ltd. | Light emitting module, light emitting unit, optical signal detection module, optical system and laser radar system |
| CN111474551A (en) * | 2020-06-01 | 2020-07-31 | 陕西高速星展科技有限公司 | FPGA-based laser phase ranging system and method |
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