CN207704032U - A kind of laser ranging system - Google Patents
A kind of laser ranging system Download PDFInfo
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- CN207704032U CN207704032U CN201721762580.3U CN201721762580U CN207704032U CN 207704032 U CN207704032 U CN 207704032U CN 201721762580 U CN201721762580 U CN 201721762580U CN 207704032 U CN207704032 U CN 207704032U
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- laser
- speculum
- laser beam
- light direction
- ranging system
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Abstract
The utility model provides a kind of laser ranging system, a kind of laser ranging system, the laser ranging system includes emission part and receiving part, emission part includes the Laser emission group and Multiplexing apparatus at least having two or more lasing light emitter, receiving part includes the filter set at least having two or more optical filters, at least laser pick-off group and signal processor with two or more laser pickoffs, lasing light emitter emits laser beam to Multiplexing apparatus simultaneously, a shoot laser beam is synthesized to object through Multiplexing apparatus, shoot laser beam forms reflection laser beam after object reflects, the reflection laser beam is to optical filter, after the optical filter, inject laser pickoff, the signal of laser beam is sent to signal processor by laser pickoff, the signal processor handles the signal synthesis received.
Description
Technical field
The utility model is related to laser technology field more particularly to a kind of laser ranging system.
Background technology
Laser range finder is widely used and is built in remote control, accurate measurement, engineering as contactless measuring instrument
If, fields, the feature that phase laser distance measurement instrument is high with its precision, power little He is convenient such as safety monitoring and intelligent control fit
For civilian scope, there are larger market and application prospect.Ranging phase method passes through institute after measurement modulated light wave air-borne transmission
The phase shift of generation, to acquire the distance that light wave is passed by.
Traditional phase laser distance meter generally uses single-emission and double-receiving or double bills to receive pattern, wherein single-emission and double-receiving pattern
In, laser emitter generates photoelectricity mixing on the mixer device of interior light path and outer light path by electrical modulation signal, is produced in interior light path
Raw mixed frequency signal, which can be used as, refers to signal S1, is reflected to after the laser beam arrival measurement target of laser transmitter projects outer
On the mixer device of light path, photoelectricity mixing is generated, signal S2, reference signal S1 and photoelectricity mixed frequency signal S2 frequency phases are mixed out
Together, phase is different, the time representated by phase difference, that is, the flight time, calculates measurement distance accordingly.
In double bill receipts patterns, two laser emitters, respectively first laser transmitter and second laser transmitting are needed
Device, first laser transmitter and mixer device form interior light path, and the laser beam that first laser transmitter is sent out is on mixer device
Photoelectricity mixing is generated by electrical modulation signal, S1 is generated and forms outer light as phase reference, second laser transmitter and mixer device
Road, laser beam that second laser transmitter is sent out reaches measure target after be reflected on mixer device and be mixed with modulated signal,
Generate signal S2；Signal S1 is identical with the frequency of signal S2, and phase is different, this two-way analog signal of processor sampling S1, S2, meter
Phase difference is calculated to obtain the flight time, calculating measurement distance accordingly.
Both the above method is all easy by external interference, cumbersome when handling received signal, to be removed and be mixed letter
Number, influence measurement accuracy and response time, so there are structure, circuit are complicated, it is of high cost the problems such as.
Utility model content
In order to overcome above-mentioned technological deficiency, the purpose of this utility model is to provide a kind of laser ranging system, by more
A lasing light emitter emits laser simultaneously, multiple laser is synthesized a coaxial laser homed on its target object by Multiplexing apparatus, through target
After object reflection, the laser beam of corresponding lasing light emitter transmitting is received by multiple laser pickoffs, after laser signal is transferred to signal
Processor is handled, in this way synthesis transmitting, multipath reception laser ranging system, it is possible to reduce laser is during flight
Suffered interference improves the resolution and signal-to-noise ratio of received signal, further increases the precision of ranging.
The utility model discloses a kind of laser ranging system, the laser ranging system includes emission part and receiving part,
It is characterized in that, the emission part includes Laser emission group and the closing light dress at least with first laser source and second laser source
It sets, the receiving part includes filter set at least with the first optical filter and the second optical filter, at least connects with first laser
Receive the laser pick-off group and signal processor of device and second laser receiver, the first laser source and second laser source simultaneously to
Multiplexing apparatus emits first laser beam and second laser beam, and a shoot laser beam is synthesized to object, institute through Multiplexing apparatus
Stating first laser beam, an at least difference, the shoot laser beam in pulsewidth and frequency are anti-through object with second laser beam
Reflection laser beam is formed after penetrating, the reflection laser beam is to first optical filter and the second optical filter, by described first
After optical filter and the second optical filter, third laser beam and the 4th laser beam are generated, and injects first laser receiver and the respectively
Dual-laser receiver, the first laser receiver and second laser receiver are by the signal of third laser beam and the 4th laser beam
It is sent to signal processor, the signal processor handles the signal synthesis received.
Preferably, at least the first speculum and the second speculum built in the Multiplexing apparatus, first speculum and
Two-mirror is mutually parallel.
Preferably, the first laser beam and second laser beam difference the first speculum of directive and the second speculum, directive
The direction of first speculum and the second speculum is respectively first into light direction and second into light direction, after speculum reflects
Direction is respectively the first light direction and the second light direction, and first speculum and the second speculum are respectively placed in and first
It is orthogonal into light direction and the first light direction into light direction and second into the position of light direction angle at 45 °, described first, second
It is orthogonal into light direction and the second light direction.
Preferably, the first laser beam and second laser beam divide to the incidence point of the first speculum and the second speculum
Not Wei the first incidence point and the second incidence point, the first laser source and second laser source, which are placed in, can make the first incidence point and second
The position of straight line and the first speculum or the second speculum angle at 45 ° where incidence point, first light direction and
Two light directions are on the same line.
Preferably, a micro- galvanometer group built in the Multiplexing apparatus, micro- galvanometer group includes a micro- galvanometer and outgoing is reflected
Mirror, micro- galvanometer is mutually parallel with outgoing speculum and its minute surface is opposite.
Preferably, the shoot laser beam is to micro- galvanometer, again through the outgoing speculum after micro- vibration mirror reflected
Reflection, homed on its target object.
Preferably, first optical filter, the second optical filter are placed in the first laser receiver, second laser receiver
Between object, the first optical filter and the second optical filter are placed in same level.
After using above-mentioned technical proposal, compared with prior art, have the advantages that：
1. reducing the influence that external interference sets laser signal；
2 improve the signal-to-noise ratio and discrimination of laser signal.
Description of the drawings
Fig. 1 meets the laser ranging system of one preferred embodiment of the utility model；
Fig. 2 meets the laser ranging system of one preferred embodiment of the utility model；
Reference numeral：1 Laser emission group；2 speculums；3 micro- galvanometers；4 outgoing speculums；5 objects；6 filter sets；7
Laser pick-off group；8 signal processors.
Specific implementation mode
The advantages of the utility model is expanded on further below in conjunction with attached drawing and specific embodiment.
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
It is the purpose only merely for description specific embodiment in the term that the disclosure uses, is not intended to be limiting the disclosure.
The "an" of singulative used in disclosure and the accompanying claims book, " described " and "the" are also intended to including majority
Form, unless context clearly shows that other meanings.It is also understood that term "and/or" used herein refers to and wraps
Containing one or more associated list items purposes, any or all may be combined.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the disclosure
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not departing from
In the case of disclosure range, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination "
In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indicates or imply
Signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to this
The limitation of utility model.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, can also be the company inside two elements
It is logical, it can be directly connected, can also indirectly connected through an intermediary, for the ordinary skill in the art, it can
To understand the concrete meaning of above-mentioned term as the case may be.
In subsequent description, using for indicating that the suffix of such as " module ", " component " or " unit " of element is only
Be conducive to the explanation of the utility model, itself there is no specific meanings.Therefore, " module " can be mixedly with " component "
It uses.
Refering to fig. 1, it is a laser ranging system preferably for meeting the utility model, including Laser emission group 1；Instead
Penetrate mirror 2；Micro- galvanometer 3；It is emitted speculum 4；Object 5；Filter set 6；Laser pick-off group 7；Signal processor 8.
As shown in Figure 1, Laser emission group 1, speculum 2, micro- galvanometer 3 and outgoing speculum 4 are constituted in laser ranging system
Emission part, speculum 2, micro- galvanometer and 3 outgoing reflection 4 mirrors constitute emission parts in Multiplexing apparatus, filter set 6；Laser connects
Receipts group 7；Signal processor 8 constitutes the receiving part in laser ranging system.There are two lasing light emitters for tool in Laser emission group 1, filter
There are two optical filters for the tool of piece group 6, and there are two laser pickoffs for the tool of laser pick-off group 7.
First laser source and second laser source in Laser emission group 1 emit laser simultaneously, and directive is built in closing light respectively
Two-face mirror in device synthesizes one laser beam, the micro- galvanometer of directive 3 after the reflection of speculum 2.
Specifically, the laser beam of two lasing light emitters transmitting, it is different at least one in frequency in pulsewidth.
Specifically, two-face mirror is parallel to each other.
Specifically, first laser source and the laser of second laser source transmitting distinguish directive two-face mirror, directive speculum
Direction be respectively first into light direction and second into light direction, the direction after speculum reflects is respectively the first light direction
With the second light direction, two-face mirror is respectively placed in first into light direction and second into the position of light direction angle at 45 °,
Therefore, described first is orthogonal into light direction and the first light direction, and second is orthogonal into light direction and the second light direction.
Specifically, the incidence point of the laser beam directive two-face mirror of first laser source and the transmitting of second laser source is respectively
First incidence point and the second incidence point, the first laser source and second laser source, which are respectively placed in, can make the first incidence point and second
The position of straight line and speculum angle at 45 ° where incidence point, thus first light direction and the second light direction exist
On same straight line.
After the micro- galvanometer of laser beam directive 3, to outgoing speculum 4 after micro- vibration mirror reflected, after outgoing speculum 4 reflects,
Homed on its target object.
Specifically, micro- galvanometer 3 is mutually parallel with outgoing speculum 4 and its minute surface is opposite, and thus laser can shake through micro-
Mirror 3 reaches outgoing speculum 4 after reflecting, then reflected by outgoing speculum 4, the laser direction after outgoing speculum 4 reflects with
The laser direction for injecting micro- galvanometer 3 is identical.
Directive filter group 6 after laser beam is reflected by object enters laser pick-off group 7 after filter group.
Specifically, it is equipped with two pieces of optical filters, the first optical filter and the second optical filter in the present embodiment, corresponds to laser hair respectively
The first laser source in group and second laser source are penetrated, according to the pulsewidth and frequency of the laser of corresponding lasing light emitter transmitting, is filtered off non-
Carry out the veiling glare of self-excitation light source.
Specifically, after laser enters laser pick-off group 7, corresponding laser signal, the present embodiment are generated by laser pick-off group 7
In, laser group reception group 7 is set there are two laser pickoff, first laser receiver and second laser receiver, then generates two
Laser signal.
Laser signal is transferred to signal processor 8 from laser pick-off group 7, is carried out synthesizing processing by signal processor 8.
Specifically, laser pick-off group 7 transmits two laser signals to signal processor 8, by signal processing in the present embodiment
Device 8 is handled.
Referring to Fig.2, it is a laser ranging system preferably for meeting the utility model, including Laser emission group 1；Instead
Penetrate mirror 2；Micro- galvanometer 3；It is emitted speculum 4；Object 5；Filter set 6；Laser pick-off group 7；Signal processor 8.
As shown in Figure 1, Laser emission group 1, speculum 2, micro- galvanometer 3 and outgoing speculum 5 are constituted in laser ranging system
Emission part, speculum 2, micro- galvanometer 3 and outgoing speculum 5 constitute emission part in Multiplexing apparatus, filter set 6；Laser connects
Receipts group 7；Signal processor 8 constitutes the receiving part in laser ranging system.There are three lasing light emitters for tool in Laser emission group 1, filter
There are three optical filters for the tool of piece group 6, and there are three laser pickoffs for the tool of laser pick-off group 7.
There are three lasing light emitters for the tool of Laser emission group 1, and first laser source, second laser source and third lasing light emitter emit simultaneously
Laser, respectively directive be built in the thrihedral reflector in Multiplexing apparatus, after speculum reflects, synthesize one laser beam, directive
Micro- galvanometer.
Specifically, the laser beam of three lasing light emitters transmitting, it is different at least one in frequency in pulsewidth.
Specifically, thrihedral reflector is parallel to each other.
Specifically, the laser of three lasing light emitter transmittings distinguishes directive thrihedral reflector, and the direction of directive speculum is respectively
First into light direction, second into light direction and third into light direction, and the direction after speculum reflects is respectively the first light extraction side
To, the second light direction and third light direction, thrihedral reflector be respectively placed in first into light direction, second into light direction and
Third is into the position of light direction angle at 45 °, and therefore, described first is orthogonal into light direction and the first light direction, the second entering light
Direction and the second light direction are orthogonal, and third is orthogonal into light direction and third light direction.
Specifically, the laser beam directive thrihedral reflector that first laser source, second laser source and third lasing light emitter emit
Incidence point is respectively the first incidence point, the second incidence point and third incidence point, and three lasing light emitters, which are respectively placed in, can make first
Straight line where incidence point, the second incidence point and third incidence point and the position with thrihedral reflector angle at 45 ° respectively, thus
First light direction, the second light direction and third light direction are on the same line.
After the micro- galvanometer of laser beam directive 3, to outgoing speculum 4 after the reflection of micro- galvanometer 3, after outgoing speculum 4 reflects,
Homed on its target object.
Specifically, micro- galvanometer 3 is mutually parallel with outgoing speculum 4 and its minute surface is opposite, and thus laser can shake through micro-
Mirror 3 reaches outgoing speculum 4 after reflecting, then reflected by outgoing speculum 4, the laser direction after outgoing speculum 4 reflects with
The laser direction for injecting micro- galvanometer 3 is identical.
Directive filter group 6 after laser beam is reflected by object enters laser pick-off group 7 after filter group 6.
Specifically, three pieces of optical filters are equipped in the present embodiment, the first optical filter, the second optical filter and third optical filter divide
Three lasing light emitters in Laser emission group are not corresponded to, according to the pulsewidth and frequency of the laser of corresponding lasing light emitter transmitting, are filtered off non-
Carry out the veiling glare of self-excitation light source.
Specifically, after laser enters laser pick-off group 7, corresponding laser signal, this implementation are generated by laser pick-off group 7
In example, laser group reception group 7 is set there are three laser pickoff, first laser receiver, second laser receiver and third laser
Receiver then generates three laser signals.
Laser signal is transferred to signal processor 8 from laser pick-off group, is carried out synthesizing processing 8 by signal processor.
Specifically, laser pick-off group transmits three laser signals to signal processor 8, by signal processor in the present embodiment
8 are handled.
In conclusion in laser ranging system in the prior art, during laser flying, often by the external world
Interference, this, which may result in, influenced from external interference factor by these when signal processing, and then causes
As a result inaccurate, a kind of laser ranging system provided by the utility model, in order to reduce external interference for signal processing
It influences, is synthesized using multi-pass, in the laser ranging of multipath reception, multichannel pulsewidth or the mutually different laser beam of frequency are synthesized
For laser beam all the way, optical filter is set in receiving part again, will not belong to the interference rejection of the pulsewidth and frequency of corresponding lasing light emitter, then
It forms signal to be handled, because the external interference that the same laser beam of each road laser beam synthesis is awing subject to is identical, connect
After receiving portions solution filters off interference, due to pulsewidth and the frequency difference of each road laser beam, the signal that multi-path laser beam is formed can phase
Mutually as reference, such system can be efficiently against deficiency in the prior art.
Mobile terminal can be implemented in a variety of manners.For example, the terminal described in the utility model may include such as
Mobile phone, smart phone, laptop, PDA (personal digital assistant), PAD (tablet computer), PMP (portable multimedias
Player), the fixed terminal of the mobile terminal of navigation device etc. and such as number TV, desktop computer etc..In the following, false
If terminal is mobile terminal.However, it will be understood by those skilled in the art that in addition to be used in particular for mobile purpose element it
Outside, the construction of embodiment according to the present utility model can also apply to the terminal of fixed type.
It should be noted that the embodiments of the present invention have preferable implementation, and not the utility model is appointed
The limitation of what form, any one skilled in the art change or are modified to possibly also with the technology contents of the disclosure above
Same effective embodiment, as long as without departing from the content of technical solutions of the utility model, according to the technical essence of the utility model pair
Any modification or equivalent variations and modification, are still within the scope of the technical solutions of the present invention made by above example.
Claims (7)
1. a kind of laser ranging system, the laser ranging system includes emission part and receiving part, which is characterized in that
The emission part includes the Laser emission group and Multiplexing apparatus at least having first laser source and second laser source；
The receiving part includes filter set at least with the first optical filter and the second optical filter, at least connects with first laser
Receive the laser pick-off group and signal processor of device and second laser receiver；
The first laser source and second laser source emit first laser beam and second laser beam to Multiplexing apparatus simultaneously, through closing light
Device synthesizes a shoot laser beam to object, the first laser beam and second laser beam in pulsewidth and frequency at least
There is a difference；
The shoot laser beam forms reflection laser beam after object reflects, and the reflection laser beam filters to described first
Piece and the second optical filter generate third laser beam and the 4th laser beam after first optical filter and the second optical filter, and
First laser receiver and second laser receiver are injected respectively；
The signal of third laser beam and the 4th laser beam is sent to letter by the first laser receiver and second laser receiver
Number processor, the signal processor handle the signal synthesis received.
2. laser ranging system according to claim 1, which is characterized in that
At least the first speculum and the second speculum built in the Multiplexing apparatus, first speculum and the second speculum are mutual
It is parallel.
3. laser ranging system according to claim 2, which is characterized in that
The first laser beam and second laser beam difference the first speculum of directive and the second speculum, the first speculum of directive and
The direction of second speculum is respectively first into light direction and second into light direction, and the direction after speculum reflects is respectively
One light direction and the second light direction, first speculum and the second speculum are respectively placed in first into light direction and
Two is orthogonal into light direction and the first light direction into the position of light direction angle at 45 °, described first, and second into light direction and
Two light directions are orthogonal.
4. laser ranging system according to claim 3, which is characterized in that
The first laser beam and second laser beam are respectively first to enter to the incidence point of the first speculum and the second speculum
Exit point and the second incidence point, the first laser source are placed in second laser source where capable of making the first incidence point and the second incidence point
Straight line and the first speculum or the second speculum angle at 45 ° position, first light direction and the second light direction
On the same line.
5. laser ranging system according to claim 1, which is characterized in that
A micro- galvanometer group built in the Multiplexing apparatus, micro- galvanometer group includes a micro- galvanometer and outgoing speculum, described micro- to shake
Mirror is mutually parallel with outgoing speculum and its minute surface is opposite.
6. laser ranging system according to claim 5, which is characterized in that
The shoot laser beam is reflected through the outgoing speculum, directive mesh again to micro- galvanometer after micro- vibration mirror reflected
Mark object.
7. laser ranging system according to claim 1, which is characterized in that
First optical filter, the second optical filter be placed in the first laser receiver, second laser receiver and object it
Between, the first optical filter and the second optical filter are placed in same level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762580.3U CN207704032U (en) | 2017-12-15 | 2017-12-15 | A kind of laser ranging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721762580.3U CN207704032U (en) | 2017-12-15 | 2017-12-15 | A kind of laser ranging system |
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| CN207704032U true CN207704032U (en) | 2018-08-07 |
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| CN201721762580.3U Active CN207704032U (en) | 2017-12-15 | 2017-12-15 | A kind of laser ranging system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966707A (en) * | 2017-12-15 | 2018-04-27 | 杭州欧镭激光技术有限公司 | A kind of laser ranging system |
| CN109669188A (en) * | 2019-01-17 | 2019-04-23 | 杜鑫 | Mostly along triggered time discrimination method and pulse type laser distance measuring method |
| CN110456323A (en) * | 2019-07-09 | 2019-11-15 | 深圳奥比中光科技有限公司 | A kind of light emitting unit, light emitting devices and distance-measuring equipment |
| CN111896971A (en) * | 2020-08-05 | 2020-11-06 | 上海炬佑智能科技有限公司 | TOF sensing device and distance detection method thereof |
-
2017
- 2017-12-15 CN CN201721762580.3U patent/CN207704032U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966707A (en) * | 2017-12-15 | 2018-04-27 | 杭州欧镭激光技术有限公司 | A kind of laser ranging system |
| CN109669188A (en) * | 2019-01-17 | 2019-04-23 | 杜鑫 | Mostly along triggered time discrimination method and pulse type laser distance measuring method |
| CN110456323A (en) * | 2019-07-09 | 2019-11-15 | 深圳奥比中光科技有限公司 | A kind of light emitting unit, light emitting devices and distance-measuring equipment |
| CN111896971A (en) * | 2020-08-05 | 2020-11-06 | 上海炬佑智能科技有限公司 | TOF sensing device and distance detection method thereof |
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