CN107966272B - The detection device for whether being parallel to screen for detecting infrared light curtain - Google Patents
The detection device for whether being parallel to screen for detecting infrared light curtain Download PDFInfo
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- CN107966272B CN107966272B CN201711361066.3A CN201711361066A CN107966272B CN 107966272 B CN107966272 B CN 107966272B CN 201711361066 A CN201711361066 A CN 201711361066A CN 107966272 B CN107966272 B CN 107966272B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
The detection device whether the invention discloses a kind of is parallel to screen for detecting infrared light curtain, the infra-red laser diode transmitting infrared beam that infrared light curtain is placed on screen by least two are formed, and detection device includes：Platform is reflected, is placed in the exit direction of light beam；Target is placed between infra-red laser diode and reflection platform, and multiple laser beam perforations are provided on target, and laser beam perforation and reflection platform are arranged so that：The light beam for being parallel to screen that infra-red laser diode issues can sequentially pass through the laser beam perforation on target, finally form speck on reflection platform；Detection sensor whether there is speck on reflection platform for detecting, and when there is the same number of speck with infra-red laser diode, the light beam for judging that the infra-red laser diode issues is parallel to the screen.The invention avoids detection process to depend on contact identification software unduly, reduces corresponding cost, and entire detection process is simple, intuitive.
Description
Technical field
The present invention relates to technical field of intelligent interaction, and in particular to one kind is for detecting whether infrared light curtain is parallel to screen
Detection device.
Background technique
In the screen touch-control man-machine interactive system based on infrared light curtain, existing infrared light curtain is emitted by multiple lasers
Fan-shaped infrared surface be formed by stacking.Since infrared light is black light, so judging light beam and screen that multiple lasers issue
It is whether parallel difficult.
Current main method is to act on finger and carry out touch-control on screen, is located at the red of screen front (or back)
Outer camera can take finger contact image, judge whether light beam puts down with screen according to the area of finger contact in image
Row, such as：When finger contact area is smaller in finger contact image, judge that light beam is parallel with screen, when finger contact area
Significantly greater than finger area when, illustrate that light beam may be irradiated to the places such as the back of the hand, that is, light beam is not parallel with screen.This inspection
The accuracy rate and consistency of survey method all need to be further increased.
Summary of the invention
In view of this, the detection dress whether the embodiment of the invention provides a kind of is parallel to screen for detecting infrared light curtain
It sets.
The embodiment of the present invention proposes to be formed by multiple infra-red laser diode transmitting infrared beams being placed on screen infrared
Light curtain, and propose a kind of detection device for whether being parallel to screen for detecting the infrared light curtain, the detection device packet
It includes：
Platform is reflected, is placed in the exit direction of light beam；
Target is placed between the infra-red laser diode and reflection platform, multiple laser is provided on the target
Perforation, the laser beam perforation and the reflection platform are arranged so that：The light for being parallel to screen that infra-red laser diode issues
Beam can sequentially pass through the laser beam perforation on target, finally form speck on the reflection platform；
Detection sensor is used to detect on the reflection platform with the presence or absence of speck, when presence and two pole of infrared laser
When the same number of speck of pipe, the light beam for judging that the infra-red laser diode issues is parallel to the screen.
In some embodiments, reflection platform is arranged in the exit direction of light beam, is located on screen.
In some embodiments, reflection platform is arranged in the exit direction of light beam, is located at outside screen.
In some embodiments, the multiple laser beam perforation is column, the axis direction of the column laser beam perforation and flat
Row is identical in the exit direction of the light beam of screen.
In some embodiments, the interval between multiple laser beam perforations can be adjusted.
In some embodiments, the distance between multiple laser beam perforations and the screen can be adjusted.
In some embodiments, the target is affixed on screen with adhesive material surface or target are by removably
It is fixed to screen.
In some embodiments, the detection sensor is infrared camera.
In some embodiments, the screen is to face screen or curve screens directly.
In some embodiments, reflection platform includes paper, lath or infrared backlight plate.
It is provided in an embodiment of the present invention to be used to detect the detection device whether infrared light curtain is parallel to screen, relative to existing
For technology, the prior art depends on video camera to the capture of the reflected light at finger contact, related software to wanting to design
The contact of captured image information is extracted and identification, entire detection process are related to the cooperation of hardware and software and the two, therefore, inspection
It is larger to survey the influence factor that result is subject to.And proposition of the invention then preferably solves these problems, avoids detection process
Contact identification software is depended on unduly, reduces corresponding cost, and entire detection process is simple, intuitive.
Detailed description of the invention
Fig. 1 is provided by one embodiment of the present invention for detecting the detection device whether infrared light curtain is parallel to screen
Schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, Fig. 1 is provided by one embodiment of the present invention for detecting whether infrared light curtain is parallel to screen
The schematic diagram of detection device.
Infra-red laser diode 101,102,103,104..., n are shown, these infra-red laser diodes can be set in Fig. 1
Set on screen 21, for example, screen top or screen edge, each infra-red laser diode issues infrared beam, Duo Gehong
The light beam that outer laser diode issues forms light curtain on the screen.It, can be right according to the needs of light curtain the thickness uniformity etc.
The light beam that multiple infra-red laser diodes issue is collimated and is focused.The light beam for issuing infra-red laser diode is collimated
It is the common technology of those skilled in the art with focusing, details are not described herein.For clarity, it is only sparsely shown in figure
In actual conditions, according to the needs of touch accuracy, more intensive two pole of infrared laser is can be set in infra-red laser diode
Pipe.
The detection device that screen whether is parallel to for detecting infrared light curtain includes：Platform 41 is reflected, light beam is placed in
In exit direction；Target 31 is placed between the infra-red laser diode and reflection platform, is provided on the target multiple
Laser beam perforation 311,312 ... m, the laser beam perforation and reflection platform are arranged so that：Infra-red laser diode issues flat
Row can sequentially pass through the laser beam perforation on target in the light beam of screen, finally form speck on the reflection platform；Detection
Sensor 51 is used to detect on the reflection platform with the presence or absence of speck, when in the presence of the number phase with infra-red laser diode
With speck when, judge the infra-red laser diode issue light beam be parallel to the screen.
It will elaborate below to more details.
As shown in Figure 1, target 31 is installed on the surface of screen 21, be provided on target 31 multiple laser beam perforations 311,
312 ..., m, wherein m is the integer greater than 1, and m is greater than or equal to the number of infra-red laser diode, multiple on target 31
Laser beam perforation 311,312 ..., the distance of m to screen 21 it is consistent, when the light beam passes through multiple laser beam perforations on target 31
311,312 ..., when m, the speck that can be detected sensor 51 and detect is formed on the reflection platform 41.
Reflection platform 41 be set on beam exit direction, can be located at screen 21 edge, or be located at screen 21 it
Outside.In some embodiments of the invention, reflection platform 41 can be paper, lath or backlight etc..
In the present embodiment, target 31 can be pasted on the surface of screen 21 by adhesive material, such as：Target 31 can lead to
Cross the surface that glue or double faced adhesive tape are detachably secured to screen 21 together in 21 surface of screen or by various connectors.At this
Invent in some embodiments, multiple laser beam perforations 311,312 ..., the section of m can be cylindric, multilateral shape, ellipse
Shape etc. can specifically be determined according to the cross sectional shape of the laser beam of outgoing, multiple laser beam perforations 311,312 ..., the axis side of m
To identical as the beam exit direction of screen is parallel to, multiple laser beam perforations 311,312 ..., m along beam exit direction thickness
Degree needs to be greater than preset threshold, which can empirically be worth to set, such as：It can be by laser beam perforation along beam exit
The thickness in direction is set greater than 1cm etc., thickness of the laser beam perforation along beam exit direction it is more big can guarantee across light beam
It is parallel to screen.The multiple laser beam perforation 311,312 ..., the number of m can be greater than and/or be equal to every group of laser diode
The number of middle laser diode, multiple laser beam perforations 311,312 ..., the distance between m can be and set in advance, can also
With according to multiple laser diodes 101,102,103 ..., the distance between n is adjusted.Such as：For one group of two pole of laser
It, can be according to several laser two of front when the outgoing beam of several laser diodes of front is parallel to screen for pipe
The distance between pole pipe adjusts the distance between laser beam perforation, so that the distance between multiple laser beam perforations and this group of laser two
The distance between multiple laser diodes are identical in pole pipe.In another example in the case where being related to multiple groups infra-red laser diode, group
Infra-red laser diode between group is spaced each other arrangement, or front and back is placed in two rows of on laser emitting direction, heel row
The light beam that issues of infra-red laser diode be emitted from the gap between front-seat infra-red laser diode, difference group laser two
The distance between adjacent laser diode may be different in pole pipe, therefore, test the light of the sending of previous group laser diode
When the light beam that next group of laser diode of beam and then test issues, by adaptively adjusting between multiple laser beam perforations
Distance enables to adapt to the distance between next group of laser diode, so that different group laser diodes are equal when being debugged
An identical target can be used, improve the flexibility of test, and resource can be saved.
Detection sensor 51 is used to detect the speck formed on reflection platform 41 by black light, in some embodiments,
Detection sensor 51 can be infrared camera, if the light beam of some infra-red laser diode sending shape on reflection platform 41
At speck, then illustrate that light beam has passed through the laser beam perforation on target 31, the light beam which issues is parallel to screen
Curtain, on the contrary, illustrating that this is red if the light beam that some infra-red laser diode issues does not form speck on reflection platform 41
The light beam that outer laser diode issues is not parallel to screen 21, need to the exit direction of the light beam of the infra-red laser diode into
Row is adjusted.To realize the adjusting, infra-red laser diode can be installed on an adjustable installation part, the adjustable installation
The adjusting to infra-red laser diode in each dimension, including adjustable infrared laser may be implemented in part according to actual needs
The displacement and angle of diode in all directions, the corresponding adjustable installation part of each infra-red laser diode can be fixed on
On one common pedestal.When being related to multiple groups infra-red laser diode, every group of infra-red laser diode can be fixed on difference
Pedestal on, thus convenient after having adjusted one group of infra-red laser diode, as needed by this group of infra-red laser diode shifting
It walks, and moves into another group of infra-red laser diode.Belong to optical path adjusting mistake in view of the adjustable installation part and its regulative mode
Device is commonly used in journey to be therefore not detailed herein.
In some embodiment of the invention, the screen can be the screen of any material and shape, such as：Liquid crystal,
LED, DLP projection screen etc., the screen, which can be, faces screen or curve screens directly.When screen is curve screens, each
Infra-red laser diode is neatly arranged in the top of screen along curved surface, correspondingly, target and reflection platform also edge
Curved surface be arranged on screen.The light beam for being parallel to screen being emitted from infra-red laser diode again passes through swashing on target
Light perforation forms speck on reflection platform, and just like described in earlier in respect of figures 1, details are not described herein again.So as to guarantee curved surface
The light curtain even density of screen surface, meanwhile, it is filled using the detection that infrared beam provided in an embodiment of the present invention is parallel to screen
It sets, can guarantee that light curtain is parallel to screen, touch accuracy and sensitivity to improve.
Another embodiment of the present invention provides the detection method that infrared beam is parallel to screen, and the infrared light curtain is by multiple
The infra-red laser diode transmitting infrared beam being placed on screen is formed, as previously described；The method includes：
S11：Reflection platform is set to the exit direction of light beam.
Such as：Reflection platform can be set in beam exit direction, be located on screen, such as positioned at screen edge；Or
Reflection platform can be set on beam exit direction, and be located at except screen.In some embodiment of the invention, platform is reflected
It can be paper, backlight or lath etc..
S12：Target is set between the infra-red laser diode and reflection platform；It is provided on the target multiple
Laser beam perforation, the laser beam perforation and reflection platform are arranged so that：The light for being parallel to screen that infra-red laser diode issues
Beam can sequentially pass through the laser beam perforation on target, finally form speck on the reflection platform.
S13：Being detected with detection sensor whether there is speck on the reflection platform, when presence and infra-red laser diode
The same number of speck when, judge the infra-red laser diode issue light beam be parallel to the screen.
Component and connection relationship therein involved in above each step of S11-S13 can be done with reference to front around Fig. 1
Description.
For example, can by target 31 multiple laser beam perforations 311,312 ..., the distance of m to screen 21 be set as one
Cause, passed through when the light beam multiple laser beam perforations 311 on target 31,312 ..., m when, formed on the reflection platform 41
The speck that can be taken by thermal camera.Can will reflection platform 41 be set on beam exit direction, herein under the premise of,
Reflection platform can be for example set to the edge of screen 21, or be set to except screen 21.In some implementations of the invention
In example, reflection platform 41 can be paper, lath or infrared light backlight etc., and the presence of the backlight is being observed convenient for human eye
The region for substantially needing to observe quickly is navigated to when thermal camera, the light intensity of backlight can be very weak, only provides an observation
Guide.
Target 31 can be pasted on the surface of screen 21 with adhesive material or be removably fixed to screen.
The respective shapes of each laser beam perforation can be designed according to the cross sectional shape of the laser beam of outgoing, and make target
Multiple laser beam perforations 311 on 31,312 ..., the axis direction of m it is identical as the beam exit direction of screen is parallel to, along light
The thickness of beam-emergence direction needs to meet certain preset value, which can empirically be worth to obtain, to guarantee light beam energy
Enough parallel passes through laser beam perforation.Can make multiple laser beam perforations 311 on the target 31,312 ..., the number of m can be with
It is greater than and/or the number of equal to every group infra-red laser diode mid-infrared laser diode, multiple laser beam perforations on target 31
311,312 ..., the distance between m can be sets in advance, can also according to multiple infra-red laser diodes 101,
102,103 ..., the distance between n is adjusted.For example, in the case where being related to multiple groups infra-red laser diode, group and group
Between infra-red laser diode be spaced each other arrangement, or front and back is placed in two rows of on laser emitting direction, heel row it is red
The light beam that outer laser diode issues is emitted from the gap between front-seat infra-red laser diode, difference group infrared laser two
The distance between adjacent infra-red laser diode may be different in pole pipe, therefore, test previous group infra-red laser diode hair
It, can be by adaptively adjusting target 31 when testing the light beam of next group of infra-red laser diode sending after light beam out
The distance between upper multiple laser beam perforations, enable to adapt to the distance between next group of infra-red laser diode, so that
Aforementioned first target and the second target can be used when debugging to different groups of infra-red laser diodes, improve the spirit of test
Activity, and resource can be saved.
Detection sensor 51 can reflect the speck formed on platform 41 by black light with captured in real-time, if some is infrared
The light beam that laser diode issues forms speck on reflection platform, then illustrates that light beam has passed through the laser beam perforation on target 31,
The light beam that the infra-red laser diode issues is parallel to screen；On the contrary, if the light beam that some infra-red laser diode issues does not have
Have and form speck on reflection platform 41, then the light beam for illustrating that the infra-red laser diode issues is not parallel to screen 21, needs
The beam exit direction of the infra-red laser diode is adjusted.To realize the adjusting, infra-red laser diode can pacify
Loaded on an adjustable installation part, which may be implemented to infra-red laser diode each according to actual needs
Adjusting in a dimension, displacement and angle including adjustable infra-red laser diode in all directions；It is each infrared sharp
The corresponding adjustable installation part of optical diode can be fixed on a common pedestal.When being related to multiple groups infra-red laser diode
When, every group of infra-red laser diode can be fixed on different pedestals, so that convenient adjusting one group of two pole of infrared laser
Guan Hou as needed removes this group of infra-red laser diode, and moves into another group of infra-red laser diode.In view of described adjustable
During section installation part and its regulative mode belong to optical path adjusting therefore common device is not detailed herein.
It should be noted that although the present embodiment is parallel to infrared light curtain provided by the invention with step S11 to step S13
It is illustrated, but the detection method provided by the invention is not limited because of above-mentioned steps in the detection method of screen
It is fixed, that is to say, that in some cases, the movement recorded in detail in the claims or step can be according to different from the present embodiment
In sequence execute and still may be implemented desired result.In some embodiments, multitasking and parallel place
It manages also possible or may be advantageous.
The prior art mentioned by the application introductory song depends on video camera catching to the reflected light at finger contact
It obtains, related software is extracted to the contact of video camera captured image information and identification, entire detection process are related to hardware and software
And the cooperation of the two, therefore, the influence factor that testing result is subject to is larger.And proposition of the invention then preferably solves these
Problem avoids detection process and depends on unduly to contact identification software, reduces corresponding cost.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of detection device for whether being parallel to screen for detecting infrared light curtain, the infrared light curtain are placed in by least two
Infra-red laser diode transmitting infrared beam on screen is formed, which is characterized in that the detection device includes：
Platform is reflected, is placed in the exit direction of light beam；
Target is placed between the infra-red laser diode and reflection platform, multiple laser beam perforations is provided on the target,
The number of laser beam perforation is greater than or equal to the number of infra-red laser diode；The laser beam perforation and the reflection platform are set as
So that：The light beam for being parallel to screen that infra-red laser diode issues can sequentially pass through the laser beam perforation on target, finally exist
Speck is formed on the reflection platform；
Detection sensor is used to detect on the reflection platform with the presence or absence of speck, when presence and infra-red laser diode
When the same number of speck, the light beam for judging that the infra-red laser diode issues is parallel to the screen.
2. according to claim 1 for detecting the detection device whether infrared light curtain is parallel to screen, which is characterized in that anti-
It penetrates platform to be arranged in the exit direction of light beam, be located on screen.
3. according to claim 1 for detecting the detection device whether infrared light curtain is parallel to screen, which is characterized in that
Reflection platform is arranged in the exit direction of light beam, is located at outside screen.
4. according to claim 3 for detecting the detection device whether infrared light curtain is parallel to screen, which is characterized in that
The multiple laser beam perforation is column, the axis direction of the column laser beam perforation and the beam exit direction phase for being parallel to screen
Together.
5. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, the interval between multiple laser beam perforations can be adjusted.
6. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, the distance between multiple laser beam perforations and the screen can be adjusted.
7. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, the target is affixed on the surface of screen with adhesive material or target is removably fixed to screen.
8. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, the detection sensor is infrared camera.
9. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, the screen is to face screen or curve screens directly.
10. it is according to any one of claims 1-4 for detecting the detection device whether infrared light curtain is parallel to screen,
It is characterized in that, reflection platform includes paper, lath or infrared backlight plate.
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| CN201711361066.3A CN107966272B (en) | 2017-12-18 | 2017-12-18 | The detection device for whether being parallel to screen for detecting infrared light curtain |
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| CN107966272B true CN107966272B (en) | 2018-11-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596445A (en) * | 2013-10-31 | 2015-05-06 | 船井电机株式会社 | Axis deviation detecting device, projector device, and axis deviation detecting method |
| CN204496155U (en) * | 2014-01-21 | 2015-07-22 | 精工爱普生株式会社 | Reflecting body and position detecting device |
| CN106225722A (en) * | 2016-04-29 | 2016-12-14 | 北京仁光科技有限公司 | Touch screen infrared surface debugging instrument and adjustment method thereof |
| CN106370130A (en) * | 2016-08-17 | 2017-02-01 | 苏州苍龙电子科技有限公司 | Detection device and method for the parallelism of infrared light curtain and large screen |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3931605B2 (en) * | 2001-09-19 | 2007-06-20 | セイコーエプソン株式会社 | Optical element inspection apparatus and optical element inspection method |
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2017
- 2017-12-18 CN CN201711361066.3A patent/CN107966272B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596445A (en) * | 2013-10-31 | 2015-05-06 | 船井电机株式会社 | Axis deviation detecting device, projector device, and axis deviation detecting method |
| CN204496155U (en) * | 2014-01-21 | 2015-07-22 | 精工爱普生株式会社 | Reflecting body and position detecting device |
| CN106225722A (en) * | 2016-04-29 | 2016-12-14 | 北京仁光科技有限公司 | Touch screen infrared surface debugging instrument and adjustment method thereof |
| CN106370130A (en) * | 2016-08-17 | 2017-02-01 | 苏州苍龙电子科技有限公司 | Detection device and method for the parallelism of infrared light curtain and large screen |
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