CN109444913A - A kind of digital intelligent miniature laser displacement sensor and its distance measuring method - Google Patents
A kind of digital intelligent miniature laser displacement sensor and its distance measuring method Download PDFInfo
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- CN109444913A CN109444913A CN201811618105.8A CN201811618105A CN109444913A CN 109444913 A CN109444913 A CN 109444913A CN 201811618105 A CN201811618105 A CN 201811618105A CN 109444913 A CN109444913 A CN 109444913A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 41
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- 238000009738 saturating Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims 1
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- 238000005259 measurement Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 6
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
The embodiment of the present application provides a kind of digital intelligent miniature laser displacement sensor and its distance measuring method, including shell, the optical bracket that is set to the enclosure interior, the laser beam emitting device being fixedly arranged on the optical bracket, the reflection unit being fixedly arranged on the optical bracket, be arranged in the reflection unit optical path exit end and with the optical receiver assembly of optical bracket clamping and the cable being connect with the optical receiver assembly.Disclosed herein as well is a kind of distance measuring methods of digital intelligent miniature laser displacement sensor.The digital intelligent miniature laser displacement sensor and its distance measuring method of the application can be realized the multi-faceted adjustment that displacement sensor is carried out on the basis of high-acruracy survey, realizes the adaptation of a variety of test environment, is easy to use.
Description
Technical field
The present invention relates to laser displacement inspecting technical field, specifically a kind of digital intelligent miniature laser displacement sensor
And its distance measuring method.
Background technique
In laser ranging technique field, nowadays apply it is most be laser displacement sensor.Laser displacement sensing
Device takes full advantage of the performance of the reflection of optical path and optics receiving part in optical principle, has reached high the convenient and fast ranging of efficiency
Effect.
Existing patent CN207741703U provides a kind of laser displacement sensor inside optical path multi-angle, multiposition adjustment
Light channel structure, including mechanical cover, the interior side of mechanical cover is provided with laser, laser and mechanical cover by swashing
Light device firm banking is fixedly connected, and the inside other side of mechanical cover is provided with camera lens stationary gland, camera lens stationary gland and machine
Tool shell is fixedly connected by optical adjustment system pedestal, and the inside of camera lens stationary gland is enclosed with optical lens.The technology is excellent
Point is to realize the optical path demand of the laser displacement sensor of different measuring ranges using adjustable light channel structure.
But the technological means of the technology is to use the movement for opening up elongated slot progress optical component to realize above-mentioned effect
Fruit, since in laser measuring technology, the distance of light part and light receiving element influences whether measurement accuracy, when optical component is sent out
When raw position is mobile, measurement accuracy variation itself will cause, without knowing it, only to adapt to based on measuring range
It is mobile to carry out optical component, may cause measurement accuracy decline, the insecure problem of test result.Therefore, it is badly in need of a kind of laser
Displacement sensor can not only guarantee high-acruracy survey, and have can multi-faceted measurement adjustment, use a variety of test wrappers
Border.
Summary of the invention
The present invention is intended to provide a kind of digital intelligent miniature laser displacement sensor and its distance measuring method, can guarantee and mention
High measuring accuracy, and the adjustment of position is relatively convenient.
To achieve the above object, the present invention provides a kind of digital intelligent miniature laser displacement sensor, including shell,
It is set to the optical bracket of the enclosure interior, the laser beam emitting device being fixedly arranged on the optical bracket, is fixedly arranged on the light
The reflection unit on bracket is learned, the reflection unit optical path exit end is set and is received with the optics of optical bracket clamping
Device and the cable connecting with the optical receiver assembly, the laser beam emitting device include diversing lens bracket, are opened in institute
The transmitting diaphragm stating the diversing lens bracket shifting chute on optical bracket and being fixedly arranged on the diversing lens bracket, the hair
Penetrating lens carrier can be moved forward and backward on the diversing lens bracket shifting chute along the exit direction of light.
Preferably, the laser beam emitting device further includes laser lamp pcb board, is set to the laser lamp pcb board output end
Diversing lens, be fixedly arranged on the optical bracket laser lamp support, run through and with the laser lamp bracket clamping laser
Lamp fixing seat and the laser emitting mouth being opened on the shell, the laser lamp pcb board extend to the laser lamp fixing seat
Interior, the laser lamp fixing seat offers aperture in light exit direction, emits thoroughly on the laser lamp support towards described
The perforation hole of laser lamp wiring is offered on the side of mirror, the aperture of the perforation hole is less than the diameter of the diversing lens, institute
The central point for stating the Laser emission end of laser lamp pcb board, the perforation hole and the laser emitting mouth is located along the same line.
Preferably, the reflection unit includes the collectiong focusing lens being clamped with the optical bracket and is set to described
The light of reception reflecting optics in optical bracket, measured object reflection is reflected through after the collectiong focusing lens through the reception
Lens reflecting.
It is further preferred that the lower rotation for receiving reflecting optics is connected with and is fixedly connected with the optical bracket
Rotating seat.
Still more preferably, the reception reflecting optics and the rotating seat pass through rotation axis connection, the rotating seat
On perpendicular to hole is offered on the direction of rotation axis, by tightening screw in compression after the reflecting optics and rotating seat rotation
Rotation axis is fixed.
Preferably, the reflection unit and the perpendicular where the optical receiver assembly are in 45 °~90 ° of acute angle.
Still more preferably, the optical receiver assembly and the perpendicular where the reflecting optics are in 45 °~60 °
Acute angle.
Preferably, the optical receiver assembly is linear array cmos device or CCD linear camera, and the optical receiver assembly is logical
It crosses conducting wire and is electrically connected the charactron for being set to the housing exterior walls.
Preferably, the cable is arranged through the shell, and the junction of the shell and the cable is equipped with binding groove
With the card line handware with the binding groove close-fitting, the card line handware circular arc is interior to be equipped with sawtooth, and the cable passes through described
Card line handware and the binding groove are fixed, and are electrically connected with the laser lamp pcb board.
The invention also discloses a kind of distance measuring method of digital intelligent miniature laser displacement sensor, this method is suitable for
Digital intelligent miniature laser displacement sensor described in the above-mentioned any one of right, method includes the following steps:
Step 1: the position of the diversing lens bracket is adjusted along the diversing lens bracket shifting chute, until passing through
The laser of the transmitting diaphragm can clearly expose to determinand；
Step 2: the reflecting optics are rotated, it is perpendicular where the reflecting optics after rotation and the optical receiver assembly
The angle of straight plane is in 45 °~90 ° acute angles, until the hot spot of reflection can clearly be imaged on the optical receiver assembly；
Step 3: mobile determinand or sensor carry out ranging to determinand, received by the optical receiver assembly
Facula position, generate two-dimensional calibrations curve；
Step 4: two-dimensional calibrations curve is carried out interal separation along X-axis and Y-axis respectively, by the interal separation point minute of X-axis
X is not denoted as it1And X2, the interal separation point of Y-axis is denoted as Y respectively1And Y2；
Step 5: choosing in curve, any of same level test result is used as test point, the test point on tester
Image point position is Xm, XmFall into X1With X2Between, measuring distance YmCorresponding interal separation value Y1And Y2, actual range YmBy following
Formula obtains:
Or
Any of same level test result is used as test point, the test point image point position on tester in selection curve
For Xn1, Xn1Fall into X1With X2Between, the line of the point and origin is being formed with acute angle in X-direction, which is denoted as θn1,
The then test point measuring distance
Yn1=Xn1×tanθn1,
In X1With X2Between choose several test points, image point position is respectively Xn2、Xn3…Xnn, several test dots
At angle be θ respectivelyn2、θn3…θnn, according to Yn1Calculation formula obtain each test point measuring distance be Yn2、Yn3…Ynn,
The actual range Yn that the corresponding tester of this section of curve reaches sensor is obtained by following formula:
Digital intelligent miniature laser displacement sensor and its distance measuring method according to the present invention, it is saturating in transmitting by setting
The setting of diversing lens shifting chute and rotating seat under mirror support can carry out more during displacement sensor carries out ranging
Angle adjustment improves digital intelligent miniature laser displacement sensor itself to the Adapter Property of a variety of measurement environment, and passes through
The distance measuring method of the application multiple spot detection, improves the measurement precision of digital intelligent miniature laser displacement sensor.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the top view of the embodiment of the present application；
Fig. 2 is the structural schematic diagram of the embodiment of the present application sensor external；
Fig. 3 is the structural blast schematic diagram of the embodiment of the present application digital intelligent miniature laser displacement sensor；
Fig. 4 is the perspective view of the explosion of each component and optical bracket installation in the embodiment of the present application；
Fig. 5 is the scheme of installation of card line handware and binding groove in the embodiment of the present application；
Fig. 6 is the scheme of installation for receiving reflecting optics and rotating seat in the embodiment of the present application；
Fig. 7 is the flow chart of distance measuring method in the embodiment of the present application；
Fig. 8 is to obtain Y in the embodiment of the present applicationmCurve synoptic diagram；
Fig. 9 is to obtain Y in the embodiment of the present applicationnCurve synoptic diagram；
Description of symbols: 1- shell, 101- indicator light, the second pcb board of 102-, 103- acrylic optical filter, 104-
One pcb board, 2- optical bracket, 3- laser beam emitting device, 31- laser lamp pcb board, 32- diversing lens, 33- diversing lens bracket,
34- diversing lens bracket shifting chute, 35- emit diaphragm, 36- laser lamp support, 37- laser lamp fixing seat, 38- laser emitting
Mouthful, 39- perforation hole, 4- reflection unit, 41- collectiong focusing lens, 42- reception reflecting optics, 43- rotating seat, 44- rotation axis,
5- optical receiver assembly, 6- cable, 61- binding groove, 62- card line handware, 7- charactron.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of digital intelligent miniature laser displacement sensor, as shown in Figure 1, including shell 1, being set to inside shell 1
Optical bracket 2, be fixedly arranged on optical bracket 2 laser beam emitting device 3, be fixedly arranged on optical bracket 2 reflection unit 4, set
It sets in 4 optical path exit end of reflection unit and is connect with the optical receiver assembly 5 of the clamping of optical bracket 2 and with optical receiver assembly 5
Cable 6.It should be noted that laser beam emitting device 3 and reflection unit 4 and optical bracket 2 are fixedly connected with mode this technology
Any one in field is fixedly connected with mode, and the present embodiment is by the way of being spirally connected.
In conjunction with shown in Fig. 1 and Fig. 3, laser beam emitting device 3 includes diversing lens bracket 33, is opened on optical bracket 2
Diversing lens bracket shifting chute 34 and the transmitting diaphragm 35 being fixedly arranged on diversing lens bracket 33, diversing lens bracket 33 can be with
It is moved forward and backward on diversing lens bracket shifting chute 34 along the exit direction of light.Wherein, diversing lens bracket 33 and optical branch
Frame 2 is integrally formed, and transmitting diaphragm 35 is fixed with the clamping of diversing lens bracket 33.
The internal chamber wall of optical bracket 2 and shell 1 is seamless applying to be fixed, and diversing lens bracket 33 is in diversing lens bracket
It is moved on shifting chute 34, enables to the light of laser is relatively sharp to shine out.
Optical receiver assembly 5 is linear array cmos device or CCD linear camera, and optical receiver assembly 5 is electrically connected by conducting wire
Connect the charactron 7 for being set to 1 outer wall of shell.
As shown in Figure 2, Figure 3 and Figure 4, laser beam emitting device 3 further includes laser lamp pcb board 31, is set to laser lamp pcb board
The diversing lens 32 of 31 output ends, the 36 laser lamp support 36 of laser lamp support being fixedly arranged on optical bracket 2 can be and be bolted in
On optical bracket 2, runs through and go out with the laser lamp fixing seat 37 of the clamping of laser lamp support 36 and the laser being opened on shell 1
Loophole 38.
Laser lamp pcb board 31 extends in laser lamp fixing seat 37, and laser lamp fixing seat 37 is opened along beam projecting direction
Equipped with aperture, in the present embodiment, preferably the range of aperture size in the hole is that 0.5~5mm can since aperture size is minimum
More veiling glare will be filtered before laser emitting, is improved laser pick-off to the clarity of hot spot, is further increased measurement accuracy.
Towards the perforation hole 39 for offering laser lamp wiring on the side of diversing lens 32, perforation hole on laser lamp support 36
39 aperture is less than the diameter of diversing lens 32, is fixed since all parts on optical bracket 2 pass through clamping, when each
It when being cooperated between component by size, can closely connect, and ensure the Laser emission end of laser lamp pcb board 31, go out
The central point of perforation 39 and laser emitting mouth 38 is located along the same line.
By above structure, as shown in figure 3, reflection unit 4 include the collectiong focusing lens 41 being clamped with optical bracket 2,
With the reception reflecting optics 42 being set in optical bracket 2, the light of measured object reflection through after collectiong focusing lens 41 through connecing
Reflecting optics 42 are received to reflect.Laser is emitted from laser lamp pcb board 31, saturating by collectiong focusing after contact measured object is reflected
Mirror 41 enters sensor internal and has reflecting optics 42 to be reflected.
As a kind of preferred embodiment of the present embodiment, as shown in fig. 6, the lower rotation for receiving reflecting optics 42 connects
It is connected to the rotating seat 43 being fixedly connected with optical bracket 2.Laser displacement sensor in the detection process, known to those skilled in the art
Be that the raising of precision means that light part is elongated at a distance from light receiving element, still, since sensor is needed using various
Environment is detected, so, smaller volume more can be improved its adaptation ability.It is then desired to carry out small ruler by other methods
High-acruracy survey under the premise of very little.It is combined by the rotating seat 43 of reflecting optics 42 and angle adjustable, enables to flare
Relatively sharp arrival light receiving element improves measuring accuracy.
In the present embodiment, it receives reflecting optics 42 and rotating seat 43 to connect by rotation axis 44, in other some realities
It applies in mode, the rotating manner for receiving reflecting optics 42 and rotating seat 43 can also be any other split type rotation side of one kind
Formula.Perpendicular to hole is offered on the direction of rotation axis on rotating seat 43, reflecting optics 42 pass through after rotating with rotating seat 43 to be tightened
Screw in compression rotation axis 44 is fixed.
It is perpendicular where reflecting optics 42 and optical receiver assembly 5 as another preferred embodiment of the present embodiment
Straight plane is in 45 °~90 ° of acute angle.In the existing some embodiments of the present embodiment, optical receiver assembly 5 has been disclosed
The case where angle between reflecting optics 42 is 22.5 ° and 60 °, although those skilled in the art can understand the big of the angle
The small detection accuracy that will affect sensor, and the size of the angle influences whether the size of sensor size itself.But
In presently filed embodiment, due to being provided with diversing lens bracket shifting chute 34 in the embodiment of the present application, pass through diversing lens
Mobile adjusting of the bracket 33 on diversing lens bracket shifting chute 34, can be realized the reception light for meeting brightness under larger angle
Spot.In the present embodiment, particularly, choosing 45 °~60 ° acute angles is optimized angle.When selection, cooperate different degrees of optics
Reception device 5 and the diversing lens bracket 33 for adjusting different location, so that after forming clearly hot spot on optical receiver assembly 5
It is tested.In actual use, such as using laser lamp transmitting terminal the laser for being 18mm at a distance from reception reflecting optics 42
When displacement sensor, when detecting distance is in 18~24mm, the angle chosen between reflecting optics 42 and optical receiver assembly 5 is
It 45 °~49 °, enables to form clear and bright hot spot on optical receiver assembly 5, what optical receiver assembly 5 can be sensitive
Carry out analysis measuring distance；When detecting distance is in 24~28mm, the angle between reflecting optics 42 and optical receiver assembly 5 is chosen
Degree is 50 °~55 °, enables to form clear and bright hot spot on optical receiver assembly 5, optical receiver assembly 5 can be quick
Sense carries out analysis measuring distance；When detecting distance is in 29~35mm, between selection reflecting optics 42 and optical receiver assembly 5
Angle be 55 °~60 °, enable to form clear and bright hot spot on optical receiver assembly 5,5 energy of optical receiver assembly
Enough sensitivities carry out analysis measuring distance.Certainly, in the actual use of the present embodiment there is also other measuring distances,
To obtain high-precision test result, this reality by the adjusting for adjusting optical receiver assembly 5 with the angle for receiving reflecting optics 42
Example is applied not repeat one by one.It, can be after adjustment by same even if encountering stage detection environment or shading type detection environment
One sensor obtains high-precision test result.
Cable 6 in actual use, may cause to pull sensor internal element because of external pullling,
Lead to rupture of line or Component Displacement, finally can all cause the influence to testing result.In conjunction with shown in Fig. 3 and Fig. 5, cable 6
It is arranged through shell 1, the junction of shell 1 and cable 6 is equipped with binding groove 61 and the card line handware 62 with 61 close-fitting of binding groove,
Sawtooth is equipped in 62 circular arc of card line handware, cable 6 is fixed by card line handware 62 and binding groove 61, and with laser lamp PCB
Plate 31 is electrically connected.61 close-fitting of card line handware 62 and binding groove, and cooperate dispensing, cable 6 can be fixed with sensor, be kept away
Exempt from above-mentioned problem to occur.
In the present embodiment, in conjunction with shown in Fig. 3 and Fig. 6, it is adhesive with Ya Ke on one side where laser emitting mouth 38 on shell 1
Power optical filter 103, laser is after the injection of laser lamp pcb board, by the filtering of diaphragm 35 and acrylic optical filter 103, so that light
Line is relatively sharp, assembles.
Since in Intelligent laser displacement sensor, pcb board can occupy biggish space, in order to preferably reduce equipment
The size of itself is provided with the second pcb board 102, the second pcb board 102 and shell in the side of optical bracket 2 in the present embodiment
Body 1 clamping be fixed, with charactron 7 be electrically connected, by charactron 7 be covered on the second pcb board 102 and with 1 spiral shell of shell
It connects and is fixed；The first pcb board 104 is provided with in the top of optical bracket 2, the first pcb board 104 and optical receiver assembly 5,
Laser lamp pcb board 31, the second pcb board 102 are electrically connected, as master control pcb board；With reception linear array cmos device or CCD
The linear data of linear camera, and specificity analysis is carried out to data content and obtains distance measurement result, and passes through cover board 105 and shell spiral shell
Tap into protection of the row to the first pcb board 104.By making full use of spare space to place large-size components, sensor is reduced
Size.
In the present embodiment, optical bracket 2 and the internal chamber wall of shell 1 are fixed using being spirally connected, convenient for later period debugging, dimension
Repair the disassembly of equal needs of work.On the outer wall of shell 1, it is also provided with indicator light 101, and select in the case where size fit
The bigger indicator light 101 of display surface, indicator light 101 and the first pcb board 104 are electrically connected, when linear array cmos device or CCD are linear
When camera receives hot spot, indicator light 101 is bright, there is shown working condition.Such as: in the case where laser lamp normal illumination, refer to
Show that lamp 101 does not work, then it represents that once several possibilities: (1) indicator light 101 damages, and inspection standard is to check pcb board work knot
Fruit；(2) it receives the damage of reflecting optics 42 or angle needs to adjust；(3) linear array cmos device or the damage of CCD linear camera；(4)
The damage of first pcb board 104.Above-mentioned several situations in the cognition of those skilled in the art, can quickly and easily judge and
Where detecting specific problem, the working condition of sensor, convenient use more can be simply represented.
Disclosed herein as well is a kind of distance measuring methods of digital intelligent miniature laser displacement sensor, and it is suitable for this realities
Apply any one digital intelligent miniature laser displacement sensor in example.In the ranging of existing some laser displacement sensors
In method, distance measuring method is echo analysis method and triangulation nothing more than.Echo analysis method is suitable for detecting over long distances, but
Measurement accuracy wants low relative to laser triangulation, and farthest detecting distance is up to 250 meters；Triangulation is more suitable for high-precision
Degree, short-range measurement.
In the present embodiment, select laser triangulation as fundamental measurement principle, as shown in fig. 7, the distance measuring method
Specifically includes the following steps:
Step 1: the position of diversing lens bracket 33 is adjusted along diversing lens bracket shifting chute 34, until passing through transmitting
The laser of diaphragm 35 can clearly expose to determinand；
Step 2: rotation reflecting optics 42, reflecting optics 42 and 5 place perpendicular of optical receiver assembly after rotation
Angle is in 45 °~90 ° acute angles, until the hot spot of reflection can clearly be imaged on optical receiver assembly 5；
Step 3: mobile determinand or sensor carry out ranging, the light received by optical receiver assembly 5 to determinand
Spot position generates two-dimensional calibrations curve；
Step 4: as shown in figure 8, two-dimensional calibrations curve is carried out interal separation along X-axis and Y-axis respectively, by the area of X-axis
Between cut-point be denoted as X respectively1And X2, the interal separation point of Y-axis is denoted as Y respectively1And Y2；
Step 5: a kind of distance calculating method as the present embodiment: choosing same level survey on tester in curve
Test result is a little used as test point, and as also shown in fig. 8, which is Xm, XmFall into X1With X2Between, test
Distance YmCorresponding interal separation value Y1And Y2, actual range YmIt is obtained by following equation:
In the requirement of test point selection, since tester surface can not accomplish absolutely straight, to generate curve tool
There is certain curvature, lifting part can not determine.Therefore one section straight as far as possible on trade-off curve as test point
Be located section, i.e., when interal separation point is divided, reduction Y as far as possible2With Y1Difference.By the test on calculated curve away from
From, than directly rough read test curve fore-and-aft distance in a coordinate system it is more accurate.
Another distance calculating method as the present embodiment: same level test result on tester in selection curve
A little be used as test point, as shown in figure 9, the test point image point position be Xn1, Xn1Fall into X1With X2Between, the point and origin
Line is being formed with acute angle in X-direction, which is denoted as θn1, then test point measuring distance Yn1=Xn1×tanθn1。
In X1With X2Between choose several test points, image point position is respectively Xn2、Xn3…Xnn, several test dots
At angle be θ respectivelyn2、θn3…θnn, according to Yn1Calculation formula obtain each test point measuring distance be Yn2、Yn3…Ynn,
The corresponding tester of this section of curve reaches the actual range Y of sensornIt is obtained by following formula:
Since data have unicity, in order to improve measuring accuracy, multi-point sampler method and average distance is selected to choose method meter
Final actual range, obtained numerical value is representative, and test result is more accurate.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of digital intelligent miniature laser displacement sensor including shell (1), is set to the internal light of the shell (1)
It learns bracket (2), the laser beam emitting device (3) being fixedly arranged on the optical bracket (2), be fixedly arranged on the optical bracket (2)
Reflection unit (4), setting are in the reflection unit (4) optical path exit end and the optics that is fixedly connected with the optical bracket (2)
Reception device (5) and the cable (6) being connect with the optical receiver assembly (5), it is characterised in that: the laser beam emitting device
It (3) include diversing lens bracket (33), the diversing lens bracket shifting chute (34) being opened on the optical bracket (2) and solid
Transmitting diaphragm (35) on the diversing lens bracket (33), the diversing lens bracket (33) can be saturating in the transmitting
It is moved forward and backward on mirror support shifting chute (34) along the exit direction of light.
2. digital intelligent miniature laser displacement sensor according to claim 1, it is characterised in that: the Laser emission
Device (3) further includes laser lamp pcb board (31), the diversing lens (32) for being set to laser lamp pcb board (31) output end, consolidates
Laser lamp support (36) on the optical bracket (2) runs through and the laser lamp with the laser lamp support (36) clamping
Fixing seat (37) and the laser emitting mouth (38) being opened on the shell (1), the laser lamp pcb board (31) extend to institute
It states in laser lamp fixing seat (37), the laser lamp fixing seat (37) offers aperture, the laser in light exit direction
Towards the perforation hole (39) for offering laser lamp wiring on the side of the diversing lens (32), the outgoing on lamp support (36)
The aperture in hole (39) be less than the diversing lens (32) diameter, the Laser emission end of the laser lamp pcb board (31), it is described go out
The central point of perforation (39) and the laser emitting mouth (38) is located along the same line.
3. digital intelligent miniature laser displacement sensor according to claim 1, it is characterised in that: the reflection unit
(4) include with the optical bracket (2) clamping collectiong focusing lens (41) and be set to connecing in the optical bracket (2)
It receives reflecting optics (42), the light of measured object reflection is through the collectiong focusing lens (41) by the reception reflecting optics
(42) it reflects.
4. digital intelligent miniature laser displacement sensor according to claim 3, it is characterised in that: the reception reflection
The lower rotation of eyeglass (42) is connected with the rotating seat (43) being fixedly connected with the optical bracket (2).
5. digital intelligent miniature laser displacement sensor according to claim 4, it is characterised in that: the reception reflection
Eyeglass (42) and the rotating seat (43) are connected by rotation axis (44), perpendicular to the direction of rotation axis on the rotating seat (43)
On offer hole, after the reflecting optics (42) and the rotating seat (43) rotation by tighten screw in compression rotation axis (44) into
Row is fixed.
6. digital intelligent miniature laser displacement sensor according to claim 4, it is characterised in that: the reflecting optics
(42) perpendicular and where the optical receiver assembly (5) is in 45 °~90 ° of acute angle.
7. digital intelligent miniature laser displacement sensor according to claim 6, it is characterised in that: the optics receives
Perpendicular where device (5) and the reflecting optics (42) is in 45 °~60 ° of acute angle.
8. digital intelligent miniature laser displacement sensor according to claim 1, it is characterised in that: the optics receives
Device (5) is linear array cmos device or CCD linear camera, and the optical receiver assembly (5) is set to by conducting wire electric connection
The charactron (7) of shell (1) outer wall.
9. digital intelligent miniature laser displacement sensor according to claim 1, it is characterised in that: the cable (6)
Be arranged through the shell (1), the junction of the shell (1) and the cable (6) be equipped with binding groove (61) and with it is described tight
Gu the card line handware (62) of slot (61) close-fitting, card line handware (62) circular arc is interior to be equipped with sawtooth, and the cable (6) passes through
The card line handware (62) and the binding groove (61) are fixed, and are electrically connected with the laser lamp pcb board (31).
10. a kind of distance measuring method of digital intelligent miniature laser displacement sensor, this method is suitable for claim 1 to 9 times
Digital intelligent miniature laser displacement sensor described in meaning one, which is characterized in that method includes the following steps:
Step 1: the position of the diversing lens bracket (33) is adjusted along the diversing lens bracket shifting chute (34), until
Determinand can be clearly exposed to by the laser of transmitting diaphragm (35)；
Step 2: the reflecting optics (42) are rotated, the reflecting optics (42) after rotation and the optical receiver assembly (5)
The angle of place perpendicular is in 45 °~90 ° acute angles, until the hot spot of reflection can be in the optical receiver assembly (5) supernatant
Clear imaging；
Step 3: mobile determinand or sensor carry out ranging to determinand, received by the optical receiver assembly (5)
Facula position generates two-dimensional calibrations curve；
Step 4: two-dimensional calibrations curve is carried out interal separation along X-axis and Y-axis respectively, the interal separation point of X-axis is remembered respectively
Make X1And X2, the interal separation point of Y-axis is denoted as Y respectively1And Y2；
Step 5: choosing in curve, any of same level test result is used as test point, the test point picture point on tester
Position is Xm, XmFall into X1With X2Between, measuring distance YmCorresponding interal separation value Y1And Y2, actual range YmPass through following equation
It obtains:
Or
Any of same level test result is used as test point on tester in selection curve, which is
Xn1, Xn1Fall into X1With X2Between, the line of the point and origin is being formed with acute angle in X-direction, which is denoted as θn1, then
The test point measuring distance
Yn1=Xn1×tanθn1,
In X1With X2Between choose several test points, image point position is respectively Xn2、Xn3…Xnn, what several test points were formed
Angle is θ respectivelyn2、θn3…θnn, according to Yn1Calculation formula obtain each test point measuring distance be Yn2、Yn3…Ynn, the section
The actual range Yn that the corresponding tester of curve reaches sensor is obtained by following formula:
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Application publication date: 20190308 |