CN206960657U - A kind of laser range finder - Google Patents
A kind of laser range finder Download PDFInfo
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- CN206960657U CN206960657U CN201720571848.9U CN201720571848U CN206960657U CN 206960657 U CN206960657 U CN 206960657U CN 201720571848 U CN201720571848 U CN 201720571848U CN 206960657 U CN206960657 U CN 206960657U
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- Prior art keywords
- range finder
- laser
- optical
- laser range
- transmission signal
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Abstract
The utility model discloses a kind of laser range finder, belongs to laser ranging technique field.The laser range finder includes a generating laser, an optical splitter, an isolator, a concentrator and a photodetector, the laser measurement signal of laser transmitter projects one is divided into one first transmission signal and one second transmission signal by the optical splitter, first transmission signal and second transmission signal it is in opposite direction and coaxial, the utility model provides that a kind of application scenario is wider, the laser range finder that measurement accuracy is higher, flexibility is good and inexpensive.
Description
Technical field
The utility model belongs to laser ranging technique field, more particularly to a kind of laser ranging that can realize bidirectional ranging
Instrument.
Background technology
Laser has the characteristics that good monochromaticjty, high directivity, strong interference immunity.Laser range finder (laser distance
Measuring instrument) it is the instrument measured using laser as light source to target range, it has feasibility
Well, the characteristics of speed is fast, precision is high.Measured in early stage between two targets apart from when can use tape measure or tape measure, when surveying
Amount farther out the distance between two targets when, if using tape measure either tape measure, it is necessary to two personal synergics or its one end be consolidated
Fixed, then tensing tape measure or tape measure respectively and bearing against two determinands could complete to measure, if measurement ceiling
Or hypertelorism, or can not measure, or due to that can not be tensed when tape measure or tape measure, cause measurement error compared with
Greatly.In order to solve the inconvenience in measurement, technical staff solves the skill of tape measure or tape measure in measurement using laser range finder
Art problem.
Common rangefinder is all unidirectional rangefinder on the market at present, measure two targets apart from when, it is necessary to ranging
The reference plane of instrument is close to one of target, then launches laser with the direction in vertical reference face, measures opposite determinand and base
The distance between quasi- face.Needing to meet above-mentioned particular/special requirement in working due to unidirectional rangefinder --- i.e. needs are by the base of rangefinder
Quasi- face is close to one of them target to be measured, makes common laser range finder when particular application measures using limited.Than
Such as measure horizontal range between two inclined-planes of loft, the tunnel internal width special applications field that measurement datum is arc surface
Close, being not easy determination using reference plane during common unidirectional laser range finder causes measurement error larger, therefore common unidirectional Laser Measuring
Distance meter is just not suitable for using in such special occasions, and use range is restricted.
Patent CN201320216332.4 proposes a kind of two-way laser rangefinder, and the two-way laser rangefinder is treated in measurement two
Reference plane need not be determined when surveying the distance between target, the deficiency for solving unidirectional laser range finder, but the two-way laser ranging
Instrument three photodiodes of needs could realize the measurement of distance between two targets to be measured, because each photodiode needs
Independent drive circuit is wanted, therefore the method hardware circuit that the invention is proposed is more complicated, manufacturing cost is higher, and its valency
Lattice are also more expensive, it is difficult to be able to extensive popularization and application.
Following deficiency be present in existing laser range finder：Firstth, unidirectional rangefinder using when need meet some requirements,
The unidirectional rangefinder application of special occasion is limited, measurement error is larger；Secondth, existing two-way laser rangefinder solves unidirectional survey
To the technical problem of application scenario limitation when distance meter measures, but its hardware circuit is more complicated, manufacturing cost is higher is unfavorable for
The popularization and application of laser range finder.
In view of this, a kind of laser range finder how is designed, is industry to eliminate drawbacks described above and deficiency of the prior art
An interior person skilled problem urgently to be resolved hurrily.
Utility model content
In order to overcome the technical problem of above-mentioned laser range finder in the prior art, the utility model provides a kind of application
The laser range finder that occasion is wide, measurement accuracy is high, flexibility is good and inexpensive.
In order to realize foregoing invention purpose, the utility model discloses a kind of laser range finder, including a generating laser,
One optical splitter, an isolator, a concentrator and a photodetector, it is characterised in that the one of the laser transmitter projects swashs
Light measurement signal, the laser measurement signal are divided into one first transmission signal and one second transmission signal, institute by the optical splitter
State the in opposite direction and coaxial of the first transmission signal and the second transmission signal.
Further, at an angle of 90, the optical splitter is disposed vertically to be sent out two reflectings surface of the optical splitter in the laser
The transmitting optical axis of emitter.
Further, the optical splitter is one first optical element, first optical element be a right-angle prism or
One 90 ° of pyramid mirrors.
Further, the optical splitter is made up of optical glass or metal.
Further, the isolator is that a liquid crystal light valve or an electric-controlled mechanical switch.
Further, the concentrator is by by the signal gathering that target to be measured is reflected back to the photodetector,
The concentrator is an optical lens module or an optical fiber component.
Further, the optical lens module includes a reflecting element and a lens group.
Further, the reflecting element is disposed vertically in the side of the lens group, and the lens group is positioned at described
Between reflecting element and the photodetector.
Further, the reflecting element is one second optical element of two reflectings surface at an angle of 90.
Further, the optical fiber component is a condenser and a multichannel optical fiber, and the multichannel optical fiber is multichannel
Input exports all the way.
Compared to prior art, technical scheme provided by the utility model has advantages below：Firstth, compared to existing
Unilateral laser range finder in technology, the application successfully solves to be not easy to determine the technical problem of reference plane in measurement process, and this swashs
Optar application scenario is wider, measurement accuracy is higher, using more flexible；Three photodiodes are needed compared to existing,
Each photodiode is required for the two-way laser rangefinder of independent drive circuit, and the laser range finder of the application can only make
Bidirectional ranging is realized with one group of emitting laser and photodiode, manufacturing cost is low, easy to spread.
Brief description of the drawings
The advantages of on the utility model, can be obtained further with spirit by following detailed description of the invention and institute's accompanying drawings
Understanding.
Fig. 1 is the structural representation of laser range finder provided by the utility model；
Fig. 2 is the structural representation of optical splitter provided by the utility model；
Fig. 3 is the operation principle schematic diagram of concentrator first embodiment provided by the utility model；
Fig. 4 is the operation principle schematic diagram of concentrator second embodiment provided by the utility model.
Embodiment
Describe specific embodiment of the utility model in detail below in conjunction with the accompanying drawings.However, the utility model should be understood
Into being not limited to this embodiment described below, and technical concept of the present utility model can be with other known technologies
Or function combines implementation with those known technology identical other technologies.
In the explanation of specific examples below, in order to clearly show that structure and working method of the present utility model, it will borrow
Help many Directional words to be described, but should by "front", "rear", "left", "right", " outer ", " interior ", " outside ", " to
It is interior ", " axial direction ", the Word Understanding such as " radial direction " be not construed as word of limitation for convenience of term, wherein the first transmitting letter
Number it is light beam b hereinafter, the second transmission signal is light beam c hereinafter.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
If Fig. 1 is a kind of structural representation of laser range finder provided by the utility model, the laser range finder is specific
Including：Generating laser 1, optical splitter 2, isolator 5, isolator 6, concentrator 3 and photodetector 4, the laser range finder are real
Bidirectional ranging is showed.
The wherein inside of generating laser 1 includes laser drive circuit, laser tube and transmitting focusing lens, laser drive circuit
Laser tube is driven to produce modulating lasering beam, the laser beam is changed into collimated light beam a after transmitting focusing lens；Optical splitter 2 is vertical
The transmitting optical axis of generating laser 1, and the middle overlapping of axles of the axis of optical splitter 2 and light beam a are positioned over, so as to realize parallel
Light beam a is divided to the light beam b and light beam c being parallel to each other for two coaxial, reverse beams, wherein, optical splitter 2 can be by metal or optics
Glass is made；Isolator 5 and isolator 6 are located in Laser emission light path respectively, control light beam b and light beam c conducting and cut-off,
Isolator 5 and isolator 6 can be that liquid crystal light valve or electric-controlled mechanical switch, and control its break-make by MCU；Laser range finder
Operation principle is：Light beam b and light beam c is formed by optical splitter 2 by generating laser 1 emitting parallel light beam a, light beam a, works as isolation
When device 5 turns on, isolator 6 ends, and light beam b is run into by the isolator 5 of conducting forms light beam d after object reflects, light beam d warps
Cross concentrator 3 and pool light beam f, light beam f is radiated on photodetector 4, and beam signal is converted into telecommunications by photodetector 4
Number, realize distance measurement function；When isolator 6 turns on, isolator 5 ends, and transmitting light beam c runs into mesh by the isolator 6 of conducting
Light beam e is formed after marking thing reflection；Light beam e pools light beam f by concentrator 3, and light beam f is radiated on photodetector 4, photoelectricity
Beam signal is converted into electric signal by detector 4, realizes distance measurement function.Wherein concentrator 3 can be optical lens module or
Optical fiber component.
Fig. 2 be optical splitter provided by the utility model structural representation, its preferably in real time for example shown in Fig. 2, point
The axis of light device 2 is placed with optical axis coincidence, and outer surface is fully reflecting surface and two reflecting surface angles are 90 °, and light beam a is irradiated to 90 °
On angle, laser beam is divided into two by arm of angle line, and is formed respectively on two reflectings surface mutual by 45 ° of reflections of reflecting surface respectively
Parallel light beam b and light beam c, obtained light beam b and light beam c is coaxial and reverse, and light beam b and light beam c are transmitted to target to be measured respectively.
Fig. 3 is the operation principle schematic diagram of concentrator first embodiment provided by the utility model, is wrapped in the embodiment
Concentrator 3 and photodetector 4 are included, concentrator 3 is made up of optical lens module, and the optical lens module includes reflecting element 3-
1st, lens subassembly 3-2, wherein reflecting element 3-1 two reflecting surface angles are 90 °, reflecting element 3-1 axis and lens subassembly
3-2 optical axis coincidence, by the light beam d and light beam e reflected by target to be measured, by reflecting element 3-1 45 degree of reflecting surface
Collimated light beam is obtained after reflection, collimated light beam reaches lens subassembly 3-2 surface, and wherein photodetector 4 is located at lens subassembly
3-2 focal position, collimated light beam e or collimated light beam d are focused on after lens subassembly 3-2 on photodetector 4, are realized and are surveyed
Away from function.Wherein, reflecting element 3-1 is optical element, can be right-angle prism or 90 ° of pyramid mirrors etc., can by optical glass and
Metal is made, but is not limited to the limitation of above-mentioned material.
Another embodiment of concentrator 3 is：Such as Fig. 4, Fig. 4 is concentrator second embodiment provided by the utility model
Operation principle schematic diagram, concentrator 3 are optical fiber components, including condenser 3-3 and multichannel optical fiber 3-4, multichannel optical fiber 3-4's
Structure is that signal input part has a multifiber, and output end be an optical fiber, and during work, light beam is through condenser 3-3 convergence importings
Multichannel optical fiber 3-4 input, and exported by multichannel optical fiber 3-4 output end, so that light beam d and light beam e convergences pass
It is defeated on photodetector 4.
Compared to prior art, technical scheme provided by the utility model has advantages below：Firstth, compared to existing
Unilateral laser range finder in technology, the application successfully solves to be not easy to determine the technical problem of reference plane in measurement process, this Shen
Laser range finder application scenario please is wider, measurement accuracy is higher, using more flexible；Secondth, three are needed compared to existing
Photodiode, each photodiode are required for the two-way laser rangefinder of independent drive circuit, the Laser Measuring of the application
Distance meter one group of emitting laser can be used only and photodiode realizes bidirectional ranging function, and manufacturing cost is low, easy to spread.
Unless otherwise instructed, it is herein presented be similar to " first ", the qualifier of " second " do not mean that it is suitable to the time
The restriction of sequence, quantity or importance, and be used for the purpose of a technical characteristic in the technical program and another technology
Feature is mutually distinguished.Similarly, the herein presented qualifier similar to " one " does not mean that the restriction to quantity, but describes
The technical characteristic not occurred above.Similarly, occur herein before number be similar to " about ", " approx "
Modifier generally comprises this number, and its specific implication should combine context meaning and understand.Similarly, only have specific
The noun of quantity measure word modification, otherwise should be regarded as including plural form again comprising singulative, in the technology herein
The individual technical characteristic of odd number can be included in scheme, a plurality of technical characteristics can also be included.
Simply preferred embodiment of the present utility model described in this specification, above example is only illustrating this
The technical scheme of utility model rather than to limitation of the present utility model.All those skilled in the art are logical according to design of the present utility model
The available technical scheme of logical analysis, reasoning, or a limited experiment is crossed, all should be within the scope of the utility model.
Claims (10)
1. a kind of laser range finder, including a generating laser, an optical splitter, an isolator, a concentrator and a photodetection
Device, it is characterised in that the laser measurement signal of laser transmitter projects one, the laser measurement signal is by the optical splitter point
Into one first transmission signal and one second transmission signal, first transmission signal and second transmission signal it is in opposite direction
It is and coaxial.
2. laser range finder as claimed in claim 1, it is characterised in that two reflectings surface of the optical splitter are at an angle of 90, described
Optical splitter is disposed vertically the transmitting optical axis in the generating laser.
3. laser range finder as claimed in claim 1, it is characterised in that：The optical splitter is one first optical element, described
First optical element is a right-angle prism or one 90 ° of pyramid mirrors.
4. laser range finder as claimed in claim 1, it is characterised in that：The optical splitter is made up of optical glass or metal.
5. laser range finder as claimed in claim 1, it is characterised in that：The isolator is a liquid crystal light valve or an automatically controlled machine
Tool switchs.
6. laser range finder as claimed in claim 1, it is characterised in that：The concentrator will be reflected back by target to be measured one
Signal gathering to the photodetector, the concentrator be an optical lens module or an optical fiber component.
7. laser range finder as claimed in claim 6, it is characterised in that：The optical lens module include a reflecting element and
One lens group.
8. laser range finder as claimed in claim 7, it is characterised in that：The reflecting element is disposed vertically in the lens group
Side, the lens group is between the reflecting element and the photodetector.
9. laser range finder as claimed in claim 7, it is characterised in that：The reflecting element be two reflectings surface at an angle of 90
One second optical element.
10. laser range finder as claimed in claim 6, it is characterised in that：The optical fiber component is that a condenser and more than one are logical
Road optical fiber, the multichannel optical fiber are that multichannel input exports all the way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571848.9U CN206960657U (en) | 2017-05-22 | 2017-05-22 | A kind of laser range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720571848.9U CN206960657U (en) | 2017-05-22 | 2017-05-22 | A kind of laser range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206960657U true CN206960657U (en) | 2018-02-02 |
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ID=61375234
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720571848.9U Expired - Fee Related CN206960657U (en) | 2017-05-22 | 2017-05-22 | A kind of laser range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206960657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957469A (en) * | 2017-05-22 | 2018-12-07 | 江苏徕兹测控科技有限公司 | A kind of laser range finder |
-
2017
- 2017-05-22 CN CN201720571848.9U patent/CN206960657U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957469A (en) * | 2017-05-22 | 2018-12-07 | 江苏徕兹测控科技有限公司 | A kind of laser range finder |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |