CN108061526A - For detect infrared light curtain whether parallel to screen detection method - Google Patents
For detect infrared light curtain whether parallel to screen detection method Download PDFInfo
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- CN108061526A CN108061526A CN201711361373.1A CN201711361373A CN108061526A CN 108061526 A CN108061526 A CN 108061526A CN 201711361373 A CN201711361373 A CN 201711361373A CN 108061526 A CN108061526 A CN 108061526A
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- screen
- infrared light
- parallel
- light curtain
- reference line
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses it is a kind of for detect infrared light curtain whether parallel to screen detection method, the infrared light curtain by least two be placed on screen infra-red laser diode transmitting infrared beam formed, the described method includes：Reflection platform is arranged to the exit direction of light beam, the light beam is radiated on the reflection platform and forms image；Prover is fitted in the surface of the screen, the infrared light supply that the prover includes is made to send light, the light which sends is formed in parallel with the reference line of reflection platform on the screen；The reference line and described image are detected using detection sensor, when the distance between the position of described image and the reference line are equal to a preset value, judges the infrared light curtain parallel to screen.Contact identification software is depended on unduly the invention avoids detection process, reduces corresponding cost, and entire detection process simple, intuitive.
Description
Technical field
The present invention relates to technical field of intelligent interaction, and in particular to one kind is used to whether detect infrared light curtain parallel to screen
Detection method.
Background technology
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 are sent
It is whether parallel difficult.
Current main method is to act on finger and touch-control is carried out on screen, positioned at the red of screen front (or below)
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 uniformity of survey method all need to be further improved.
The content of the invention
For infrared light curtain of the prior art be not easy to be detected whether parallel to screen situation, the application propose by
Multiple infra-red laser diode transmitting infrared beams being placed on screen form infrared light curtain and provide a kind of novel detection
Whether method detects this infrared light curtain parallel to screen, the described method includes：An embodiment of the present invention provides one kind to be used for
Detect infrared light curtain whether parallel to screen detection method, the described method includes：
Reflection platform is arranged to the exit direction of light beam, the light beam is radiated on the reflection platform and forms image；
Prover is fitted in the surface of the screen, the infrared light supply that the prover includes is made to send light, this is infrared
The light that light source is sent is formed in parallel with the reference line of reflection platform on the screen；
Detect the reference line and described image using detection sensor, when the position of described image and the reference line it
Between distance be equal to a preset value when, judge the infrared light curtain parallel to screen.
In some embodiments of the invention, the prover includes more than two infrared hairs as the infrared light supply
Optical diode, described two above infrared light-emitting diodes connect to form the reference line.
In some embodiments of the invention, the prover be backlight, the light-emitting surface of the backlight or with shine
The surface for fitting in the screen on one side that face is oppositely arranged.
In some embodiments of the invention, the reflection platform normal to screen, the reflection platform includes paper, backlight
Any one in plate, wall or projection screen.
In some embodiments of the invention, the method further includes：Prover and reflection platform are wholely set, prover hair
The light gone out is projected from the one side being bonded with screen of reflection platform, is formed in parallel with the reference line of reflection platform.
In some embodiments of the invention, the distance of screen described in one lateral extent of separate screen of the light beam is h, described
The width for reflecting platform along the vertical direction of the screen is more than or equal to h, between two optical diaphragms of the backlight
Distance is less than h.
In some embodiments of the invention, the distance for reflecting the vertical direction on platform along the screen is to be set at h
Mark is equipped with, after detecting the reference line and described image using detection sensor, when the position of described image and the ginseng
Examine the distance between line it is identical before, the method further includes：
The position relationship between described image and the mark is judged, when described image is located at the separate screen of the mark
During one side, laser diode is adjusted, makes the light beam that it sends close to screen；When described image is located at the mark close to screen
One side when, adjust laser diode, the position for making described image is identical with the distance between the reference line.
In some embodiments of the invention, the detection sensor is infrared camera.
In some embodiments of the invention, the screen is to face screen or curve screens directly.
In some embodiments of the invention, described image is circular spot or strip image.
It is provided in an embodiment of the present invention for detect infrared light curtain whether parallel to screen detection method, compared with 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 extraction of the image information of capture 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 the proposition of the present invention then preferably solves the problems, such as these, avoids detection process
Contact identification software is depended on unduly, reduces corresponding cost, and entire detection process simple, intuitive.
Description of the drawings
Fig. 1 be it is provided by one embodiment of the present invention for detect infrared light curtain whether parallel to screen detection method
Flow diagram.
Fig. 2 be it is provided by one embodiment of the present invention for detect infrared light curtain whether parallel to screen detection device
Schematic diagram.
Fig. 3 is the structure diagram on the surface that prover provided by one embodiment of the present invention fits in screen.
Fig. 4 is another structure diagram on the surface that prover provided by one embodiment of the present invention fits in screen.
Fig. 5 is the structure chart that can be used for the installed part of the present invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the 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 whether detecting infrared light curtain parallel to screen
The flow diagram of detection method, the described method includes：
S11：Reflection platform is arranged to the exit direction of light beam, the light beam is radiated at formation figure on the reflection platform
Picture.
In embodiments of the present invention, as shown in Fig. 2, Fig. 2 is to be used to detect whether infrared light curtain puts down in the embodiment of the present invention
Row in screen detection device structure diagram, multiple laser diodes 101,102 ..., n be arranged in screen in the form of an array
Curtain a top, light multiple laser diodes 101,102 ..., n.Can be as needed, collimation is loaded before laser diode
Condenser lens, Bao Weier prism etc., so that the light beam can be collimation and the rectilinear light beam or sector light of focusing
Beam.Multiple laser diodes 101,102 ..., the surfaces of light beam along screen a that send of n form top-down infrared light
Curtain.
The multiple laser diode for example can be first respectively arranged in multiple installed parts 51 as shown in Figure 5, each
Installed part 51 can be installed on by the knob (not shown) of surrounding on the fixed frame of L-shaped, and the fixed frame of L-shaped is fixed on screen
Curtain top；It projects in the hole of the light that laser diode is sent through 51 front end of installed part.All installed part arranged in rows are arranged in same
One height, and the edge in the hole of installed part front end is made to recline screen, although this can't ensure that emergent light is completely parallel to screen.
By the precession and back-out of the screw of surrounding, the pitch angle of the emergent light of laser diode can be angularly finely adjusted, be
This, the bottom of installed part 51 can be fixed on an elastic base, elastic base is not shown in figure for simplicity.In view of
The adjusting that pitch angle etc. is carried out by certain methods has been known to those skilled in the art, therefore is no longer described in detail herein, and Fig. 5 is also only
It shows roughly.
In this step, reflection platform 301 can be arranged at multiple laser diodes 101,102 ..., the light beams that send of n
Exit direction, for example, can will reflection platform 301 set on the screen, for example, it is opposite to be arranged at multiple laser diodes
The edge of screen, alternatively, reflection platform 301 can be arranged on outside screen, for example, it is opposite to be arranged on multiple laser diodes
On the extended line at the edge of screen, reflection is formed so that the light beam that multiple laser diodes are sent can be radiated on reflection platform
Image, when laser diode sends the rectilinear light beam of collimation and focusing, the reflected image is circular reflected image；When sharp
When optical diode sends sector light beam, the reflected image is that (herein, two long sides can be considered as the reflected image of strip
The upper and lower surfaces (or the face away from screen or face of close screen) of sector light beam in the thickness direction thereof are flat with reflection
Platform acts on what is formed).
In some embodiments, reflection platform 301 can be vertically set on the screen a opposite with multiple laser diodes
Edge.
S12：Prover is fitted in the surface of the screen, the infrared light supply that the prover includes is made to send light, it should
The light that infrared light supply is sent is formed in parallel with the reference line of reflection platform on the screen.
Fig. 2 is continued referring to, can prover 201 be fitted in the surface of screen a by cohesive material, alternatively, can lead to
The surface that prover 201 is removably attached to screen a by dismountable connector is crossed, prover 201 can include sending out
Go out the light source of infrared light, screen surface can be arranged at and by the position of near reflex platform 301, meanwhile, prover 201 can be put down
For row in the edge for the screen for being provided with reflection platform 301, the light that the infrared light supply is sent for example can be along on prover
The side position to recline with screen transmits, and is detected to form the sensor that can be detected bright together in the position
Lines, which will be used as with reference to line parallel to reflection platform, prover and screen can be determined by the lines position
The position to recline.The cohesive material is, for example, glue or double faced adhesive tape.The length of prover 201 can be with the length or width of screen
The identical either different such as shorter than length or width of screen.Detection sensor b is arranged at the upper front of screen a at a certain angle,
The detection sensor b can be infrared camera, such as：Infrared camera b is arranged at a certain apart from screen above screen a
The position of horizontal distance (being, for example, 1m), and screen a and reflection platform 301 are respectively positioned in the angular field of view of infrared camera b.
Under some cases, prover and reflection platform can be wholely set, and the light that prover is sent is bonded from reflection platform with screen
One side project, be formed in parallel with reflection platform reference line.
In some embodiments of the invention, as shown in figure 3, Fig. 3 is prover fitting provided by one embodiment of the present invention
A kind of schematic diagram when screen surface, the prover 201 includes more than two infrared light-emitting diodes, more than two
Infrared light-emitting diode with predetermined interval be affixed on screen a surface or more than two infrared light-emitting diodes between arbitrary
Every the surface for fitting in screen a.Such as：At least two infrared light-emitting diodes are pasted on to the table of screen a with adhesive material
Face, and make its shinny at least two infrared light-emitting diode power supply, at least two infrared light-emitting diodes hair
The luminous point that the infrared light gone out is formed connects, and forms a reference parallel to the screen a edges where reflection platform 301
Line.
In some embodiments of the invention, as shown in figure 4, Fig. 4 is the another of prover provided by one embodiment of the present invention
A kind of structure diagram, the prover 201 can be backlights, and the backlight can be the back of the body for having side light emitting structure
Tabula rasa or the backlight with bottom-emission structure.Backlight with side light emitting structure is that LED light source is arranged at the back of the body
Between the side in the space of the two panels optical diaphragm composition of tabula rasa, LED sends the light of required brightness, by light guide plate in backlight
Effect, side light source is converted to formal area source, so that backlight emits beam；The back of the body with bottom-emission structure
Tabula rasa be by LED light source array be uniformly arranged on backlight two panels optical diaphragm form space bottom, LED light source array
It is emitted beam with the direction perpendicular to light-emitting surface.
In some embodiments, opposite with light-emitting surface screen a can be pasted on the light-emitting surface of backlight or on one side
Surface, and cause backlight side parallel to the screen edge where reflection platform 301, detection sensor b acquisition backlights
The infrared light that sends of side, so as to which the lines of the infrared light that sends backlight side in the picture are as referring to line.It is described
The length of backlight can be identical with the length and width edge of screen.
S14：The reference line and described image are detected using detection sensor, when the position of described image and the reference
When the distance between line is equal to a preset value, judge the infrared light curtain parallel to screen.
In the present embodiment, when lighting laser diode so that when laser diode sends light beam, the energy on reflection platform
Enough form image, the surface that prover is fitted in screen sends the light of infrared light supply, at this point, detection sensor b can be adopted in real time
The light and the strip on reflection platform 301 or circular reflected image that collection prover 201 is sent.The reflection platform can
To be any one in paper, backlight, wall or screen.In some embodiments of the invention, the detection sensor is
Infrared camera, the light that prover is sent are infrared light.At this point, infrared camera can the light that sends of captured in real-time prover and
The strip or circular reflected image formed on reflection platform 301.The knob on installed part is adjusted, until infrared camera is shown
Show reflection platform 301 on strip image parallel to the reference line (herein, it is described it is parallel refer to strip image it is two long
While being respectively parallel to the reference line, two long sides can be considered as two up and down of sector light beam in the thickness direction thereof
Face with reflection platform action formed) namely the position of described image it is identical with the distance between the reference line；Or reflection
Multiple circular images on platform 301 are all identical to the distance between the reference line, at this point it is possible to think each laser diode
The light beam sent is parallel to each other, when the distance meets preset value, judges the light curtain of the light beam formation parallel to screen.
In some embodiments of the invention, the light beam of laser diode transmitting distance screen at marginal position on the screen
The thickness of curtain a is h, such as distance of the light beam on the screen at marginal position apart from screen is 3mm.It can will reflect platform 301
It is set greater than being equal to h along the width in vertical screen direction, it in practical applications, can be on reflection platform apart from screen edge
Distance makes marks line for the place of h, after detection sensor is used to detect the reference line and described image, when the figure
Before the position of picture is identical with the distance between the reference line, the method may also include, and judge described image and the mark
Remember line between position relationship, when reflect platform on strip or circular image be located at one side of the mark line away from screen when,
The distance for illustrating beam distance screen has been more than h, it is necessary to adjust the pitch angle between laser diode and screen, makes two pole of laser
The light beam that pipe is sent is close to screen；When the strip on reflection platform or circular image are located at mark line close to the one side of screen
When, the distance for illustrating beam distance screen within a preset range, can continue to adjust the knob on laser diode installed part, make
Obtain position (herein, parallel two long sides for referring to strip image parallel with the reference line of the strip image
The reference line is respectively parallel to, two long sides can be considered as the upper and lower surfaces of sector light beam in the thickness direction thereof
Formed with reflection platform action) or so that the position of multiple circular images is identical with the distance between the reference line.
In some embodiments of the invention, the screen can be the screen of arbitrary material and shape, such as：Liquid crystal,
LED, DLP projection screen etc..
In some embodiments of the invention, when laser diode send collimation and focus on light beam when, the screen can be with
To face screen or curve screens directly, laser diode can in the top of curve screens along curve flexible arrangement, so as to
Enough ensure the light curtain even density on curve screens surface, at this point it is possible to make corresponding mark line or reference line curved also along curved surface
Song distribution.Using the method for generation infrared light curtain provided in an embodiment of the present invention, even if can ensure in face of curve screens, light curtain
Still accuracy and sensitivity can be touched so as to improve parallel to screen.
Although it should be noted that the present embodiment with step S11 to step S13 to generation infrared light curtain provided by the invention
Method be illustrated, but not because above-mentioned steps limit the production method of the infrared light curtain provided by the invention
It is fixed, that is to say, that in some cases, the action recorded in detail in the claims or step can be according to different from the present embodiment
In order perform and still can realize desired result.In addition, also not only by particular order shown in figure
Or consecutive order could realize desired result.In some embodiments, multitasking and parallel processing be also can be with
Or it may be advantageous.
It is provided in an embodiment of the present invention for detect infrared light curtain whether parallel to screen detection method, compared with 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 extraction of the image information of capture 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 the proposition of the present invention then preferably solves the problems, such as these, avoids detection process
Contact identification software is depended on unduly, reduces corresponding cost, and entire detection process simple, intuitive.
The above description is merely a specific embodiment, but protection scope 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 domain subject to.
Claims (10)
1. it is a kind of for detect infrared light curtain whether parallel to screen detection method, the infrared light curtain is placed in by least two
Infra-red laser diode transmitting infrared beam on screen is formed, which is characterized in that the described method includes：
Reflection platform is arranged to the exit direction of light beam, the light beam is radiated on the reflection platform and forms image；
Prover is fitted in the surface of the screen, the infrared light supply that the prover includes is made to send light, the infrared light supply
The light sent is formed in parallel with the reference line of reflection platform on the screen；
The reference line and described image are detected using detection sensor, when between the position of described image and the reference line
When distance is equal to a preset value, judge the infrared light curtain parallel to screen.
2. according to claim 1 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that institute
Stating prover includes more than two infrared light-emitting diodes as the infrared light supply, described two above infraluminescences
Diode connects to form the reference line.
3. it is according to claim 1 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that
The prover is backlight, the light-emitting surface of the backlight or fits in the screen on one side with what light-emitting surface was oppositely arranged
Surface.
4. it is according to claim 1 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that
The reflection platform normal to screen, the reflection platform include any one in paper, backlight, wall or projection screen
Kind.
5. it is according to claim 1 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that
The method further includes：Prover and reflection platform are wholely set, and the light that prover is sent is bonded from reflection platform with screen
One side project, be formed in parallel with reflection platform reference line.
6. it is according to claim 4 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that
The distance of screen described in one lateral extent of separate screen of the light beam is h, vertical direction of the reflection platform along the screen
Width be more than or equal to the distance between h, two optical diaphragms of the backlight be less than h.
7. it is according to claim 6 for detect infrared light curtain whether parallel to screen detection method, which is characterized in that
Along the distance of the vertical direction of the screen to be provided with mark at h on the reflection platform, institute is detected using detection sensor
After stating reference line and described image, before identical with the distance between the reference line when the position of described image, the side
Method further includes：
The position relationship between described image and the mark is judged, when described image is located at the one side of the mark away from screen
When, laser diode is adjusted, makes the light beam that it sends close to screen；When described image is located at the mark close to the one of screen
During side, laser diode is adjusted, the position for making described image is identical with the distance between the reference line.
8. according to claim 1-7 any one for detect infrared light curtain whether parallel to screen detection method,
It is characterized in that, the detection sensor is infrared camera.
9. according to claim 1-7 any one for detect infrared light curtain whether parallel to screen detection method,
It is characterized in that, the screen is to face screen or curve screens directly.
10. according to claim 1-7 any one for detect infrared light curtain whether parallel to screen detection method,
It is characterized in that, described image is circular spot or strip image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361373.1A CN108061526A (en) | 2017-12-18 | 2017-12-18 | For detect infrared light curtain whether parallel to screen detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711361373.1A CN108061526A (en) | 2017-12-18 | 2017-12-18 | For detect infrared light curtain whether parallel to screen detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108061526A true CN108061526A (en) | 2018-05-22 |
Family
ID=62138792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711361373.1A Withdrawn CN108061526A (en) | 2017-12-18 | 2017-12-18 | For detect infrared light curtain whether parallel to screen detection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108061526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855898A (en) * | 2020-01-14 | 2020-02-28 | 武汉精立电子技术有限公司 | Checkerboard graph for curved screen test, image acquisition method and device |
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| EP0984245A2 (en) * | 1998-08-31 | 2000-03-08 | Central Glass Company, Limited | Method of and apparatus for inspecting surface irregularities of transparent plate |
| CN105264328A (en) * | 2013-06-03 | 2016-01-20 | 迈通电子有限公司 | Measuring frame for optically ascertaining a perforation position in a contactless manner, and corresponding measurement method |
| CN106091927A (en) * | 2016-07-09 | 2016-11-09 | 大连理工大学 | A kind of levelling self-luminous Feature target |
| 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 |
-
2017
- 2017-12-18 CN CN201711361373.1A patent/CN108061526A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0984245A2 (en) * | 1998-08-31 | 2000-03-08 | Central Glass Company, Limited | Method of and apparatus for inspecting surface irregularities of transparent plate |
| CN105264328A (en) * | 2013-06-03 | 2016-01-20 | 迈通电子有限公司 | Measuring frame for optically ascertaining a perforation position in a contactless manner, and corresponding measurement method |
| 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 |
| CN106091927A (en) * | 2016-07-09 | 2016-11-09 | 大连理工大学 | A kind of levelling self-luminous Feature target |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855898A (en) * | 2020-01-14 | 2020-02-28 | 武汉精立电子技术有限公司 | Checkerboard graph for curved screen test, image acquisition method and device |
| CN110855898B (en) * | 2020-01-14 | 2020-07-31 | 武汉精立电子技术有限公司 | Image acquisition method and device |
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Application publication date: 20180522 |