CN1282063C - Infrared positioning mouse teacher's pointer - Google Patents
Infrared positioning mouse teacher's pointer Download PDFInfo
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- CN1282063C CN1282063C CNB031325602A CN03132560A CN1282063C CN 1282063 C CN1282063 C CN 1282063C CN B031325602 A CNB031325602 A CN B031325602A CN 03132560 A CN03132560 A CN 03132560A CN 1282063 C CN1282063 C CN 1282063C
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Abstract
The present invention relates to an infrared positioning mouse ferule which is composed of an infrared positioning system, a ferule rod and computer software. The infrared positioning system and a computer control system complete infrared planar positioning. A ferule and the computer are in wireless connection, which mainly complete infrared shielding and the functions of a left and a right key of the mouse and the ferule. A plane positioning system is controlled by a singlechip to collect data; then the data is sent to the computer, and finally, the computer software completes the calculation and the control that the current ferule head shields the cursor position. The current cursor of the device of the present invention can immediately achieve the position where a user points, which avoids that the operation is carried out by following the cursor by using a common mouse when teaching or a lecture is carried out by using a projection screen of a multimedia computer, and therefore, the inconvenience can not be brought to the user. The current cursor can make a speaker optionally point when standing in front of the screen to realize that the cursor reaches the position where the ferule points, and thereby, the lecture quality can be improved. The current cursor can be widely used as a control device of the demonstration of a large multimedia screen.
Description
Technical field: the present invention relates to the location mouse teacher's pointer that a kind of multimedia computer large screen projection is used, particularly a kind of teacher's pointer that promptly promptly arrives the control computer mouse.
Background technology: along with the improvement of development of computer and education hardware environment, the application of various multimedia computer large screen projection demonstrations, people have higher requirement to computer operation, in in the past teaching or demonstration, adopt mouse to control mostly, and the mouse location mainly is to see that cursor operates at present, like this for the speaker, before the operation cursor, must know the position of current cursor, thereby bring multiple inconvenience to use.Present widely used several multimedia mouse teacher's pointers its essence is that the method that still adopts rolling mouse realizes the control of computer cursor or realizes its operation, and look for current cursor for a user in the face of the audience, do not have to be suspected to have multiple inconvenience.
The content of invention: overcome the deficiencies in the prior art, design a kind of realize promptly putting promptly (so-called promptly promptly to be exactly the teacher's pointer point to any one point of giant-screen, cursor is just immediately to this point) infrared ray used of multimedia computer large screen projection locatees the mouse teacher's pointer.Infrared ray location mouse teacher's pointer is by infrared ray location system, teacher's pointer lever system and computer control system are formed, the both sides that infrared ray location system is included in projection screen are equipped with far infrared transceiver, four infrared lamps lay respectively at the inside of R-T unit, the infrared lamp is positioned at the top of R-T unit, in R-T unit, every 0.75 centimetre a receiving light is installed from top to bottom, all there is the data acquisition line to link to each other in the bottom of R-T unit with data acquisition controller, and data acquisition unit links to each other with the serial ports of main frame by Serial Port Line, computing machine links to each other with projector equipment by video line, the teacher's pointer lever system comprises the teacher's pointer head, the teacher's pointer bar, two buttons about being equipped with on the teacher's pointer handle, in the inside of teacher's pointer handle a radio transmitting apparatus is housed also, in the mouse of computing machine, a radio system is installed, receive the left and right press key information of teacher's pointer, infrared ray location system and computer control system are finished the infrared ray plane positioning; The teacher's pointer lever system is by the teacher's pointer head, the teacher's pointer bar, the teacher's pointer handle, right and left key on the teacher's pointer handle, radio transmitters in the teacher's pointer handle, and the wireless receiver on the computer mouse mouth is formed, it finish infrared ray block the location and mouse right and left key and teacher's pointer function, finish data acquisition by the Single-chip Controlling plane positioning system, again data are sent to computing machine, finish the calculating and the control of current teacher's pointer head shading light cursor position at last by computer software, data transmission can adopt wire transmission or wireless transmission between single-chip microcomputer and the computing machine, infrared ray blocks localization method and adopts 4 emission bilateral method of reseptances, teacher's pointer is connected with computer wireless, finishing infrared ray blocks and mouse right and left key and teacher's pointer function, the Single-chip Controlling plane positioning system is finished data acquisition, again data are sent to computing machine, finish the calculating of current teacher's pointer head shading light cursor position at last by computer software; When infrared discharge lamps is lighted, the receiving light of the far infrared transceiver on opposite can be received the position of being blocked by the teacher's pointer head accordingly, these two groups of data send to data acquisition controller by the data acquisition line, through data acquisition controller data are carried out Screening Treatment, send to main frame by serial ports then, main frame is handled the data that serial ports comes, obtain a little on far infrared transceiver measurement face, be true origin with the infrared discharge lamps, absolute position in the coordinate system, to put initial point by the software relative set as the projection relative coordinate, as long as when cursor point is to this angle, cursor on the computer screen just arrives this place at once, the position of teacher's pointer head indication is positioned within four points of projection, at this moment, during infrared discharge lamps process teacher's pointer head, form a blocked area that forms by schematic lines, get the position of teacher's pointer head on screen to the end.The present invention since adopt current cursor, promptly promptly to mode carry out work, avoid when using the multimedia computer projection screen to impart knowledge to students or give a lecture the cursor operations of seeing with class such as common mouse, bring inconvenience to the user, click realization teacher's pointer point arbitrarily thereunto before making the lecturer can stand in screen, cursor is just followed thereunto, thereby improves speech
Figure 15 is a teacher's pointer topology view of the present invention;
Figure 16 is a general structure view of the present invention;
Figure 17 is an infrared ray grating position detecting circuit synoptic diagram;
Figure 18 is the receiver electrical schematic diagram;
Embodiment: as Figure 16, in the both sides of projection screen 7 far infrared transceiver 1 is installed, 2, and four infrared lamps 3,4,5,6 lay respectively at R-T unit 1,2 inside, infrared lamp 3,6 are positioned at R-T unit 1,2 top, infrared lamp 4,5 are positioned at R-T unit 1,2 positions apart from 2.5 meters at top, at R-T unit 1, every 0.75 centimetre a receiving light is installed from top to bottom in 2, at R-T unit 1,2 bottom all has data acquisition line 11 to link to each other with data acquisition controller 12, and data acquisition unit 12 links to each other with the serial ports of main frame 14 by Serial Port Line 15, computing machine links to each other with projector equipment by video line simultaneously, in addition, teacher's pointer head 9 is that a black diameter is that 3 centimetres polyfoam is made, 10 on teacher's pointer bar is made by high charcoal fiber, two buttons (promptly realizing mouse right and left key function) about teacher's pointer is equipped with 8 respectively, at teacher's pointer a radio transmitting apparatus also is equipped with in 8 inside, in the mouse 16 of computing machine, a radio system is installed, to receive the left and right press key information of teacher's pointer.
Principle of work: as shown in figure 16, content on the computer screen 13 projects on the projection screen 7 by projector 18, point 23,24,25,26 are respectively projection throws into four angles of projection on the curtain, at first, on teacher's pointer head 9 point-to-points 23, localization method by the front, we draw, at this moment when infrared discharge lamps 3 is lighted, the receiving light in far infrared transceiver 2 on opposite just can be received accordingly the position of the lamp that is blocked by the teacher's pointer head, in like manner, when infrared discharge lamps 6 is lighted, receiving light in the far infrared transceiver 1 on opposite also can be received the position of being blocked by the teacher's pointer head accordingly, these two groups of data send to data acquisition controller 12 by data acquisition line 11, carry out Screening Treatment through 12 pairs of data of data acquisition controller, send to main frame 14 by serial ports then, the data that 14 pairs of serial ports of main frame come are handled, obtain a little 23 in far infrared transceiver 1, on the 2 measurement faces that form with infrared discharge lamps 3 be true origin (note coordinate to the right with downward value be on the occasion of, the coordinate system that this coordinate system and computer screen show is identical) coordinate system in the absolute position, simultaneously, to put 23 initial points by the software relative set as the projection relative coordinate, that is to say, as long as when cursor point is to this angle, cursor on the computer screen just arrives this place at once, equally, to putting 24,25,26 position, finish this point 23,24,25, after 26 the absolute coordinates location, we just can normally use this system.As shown in figure 16, the position of teacher's pointer head 9 indications is positioned at four points 23 of projection, 24,25, within 26, at this moment, during infrared discharge lamps 3 process teacher's pointer heads 9, form a blocked area that forms by schematic lines 19 and schematic lines 20, in like manner, infrared discharge lamps 6 too, form the blocked area that schematic lines 21 and schematic lines 22 form, utilize the principle of introducing previously, we can get the position of teacher's pointer head on screen to the end, from result of use, as long as the teacher's pointer head is put a position of projection, cursor is just at once with to the position that the teacher's pointer head is put, and promptly realized the cursor positioning function that promptly promptly arrives cooperating teacher's pointer that last right and left key is operated simultaneously, we then realize all the cursor operations functions to computing machine on projection screen, be particularly suitable for using in multimedia teaching and use a computer and carry out the place that projection is drilled.The structure of far infrared transceiver 1,2: far infrared transceiver is installed in the projection screen left and right sides respectively, and its internal circuit is the same, following diagram.WYJ1 to WYJn is and series-in-series-out register among the figure, and HK381B is an infrared receiver, and HK2051 is an infrared transmitter, and BT is the teacher's pointer end points on the contact projection screen.The course of work is, under the control of Single Chip Microcomputer (SCM) program, infrared transmitter D1 lamp is bright, and (reality all has projection near about A, machine is got the A point after handling as calculated) on the A point fallen in its BT projection, receiver HK381B is output as " 1 " (not receiving and blocking the every of signal is " 0 ") after receiving and blocking signal, then under the control of Single Chip Microcomputer (SCM) program, the M pulse is squeezed into, and data is sent into the WYJ register latch, then, by shift pulse CLK data are sent into host computer by serial ports.It is bright then to launch lamp D2, the same D1 of its process, and the information that B is ordered is also sent into host computer.
Another R-T unit is sent D3, D4 information into host computer equally, and process as previously mentioned thereafter.Here it is R-T unit 1, R-T unit 2 principle of work.
Adopt HK381B infrared receiver such as Figure 18,, the HK2051 infrared transmitter, be in order to improve interference free performance, receive, the emission lamp adopts the 38KHZ modulation system, proves that through reality this method can be eliminated extraneous light and disturb.Figure 17 is an infrared ray grating position detecting circuit synoptic diagram.
Mouse 16 teacher's pointers of computing machine and teacher's pointer are interior transmitting set structure: mouse receiver, teacher's pointer handle internal launcher electrical schematic diagram as shown: need to prove that here mouse receiver, handle internal launcher only are used for realizing that the mouse right and left key clicks, double-clicks, drags and lead function and use.When pressing the transmitter left button, receiver left side path analoging switch MK-Z closure makes left mouse button also closed, and band can reach same purpose by the transmitter right button with dragging to lead for the process of original direct control mouse.Handle, at its lower end is rotatable to be opened, and is used for changing the transmitter battery.
Illustrate that below in conjunction with accompanying drawing realization promptly puts promptly the positioning principle of the mouse teacher's pointer of function: cursor is positioned, obtain the position of teacher's pointer head on projection screen, it is the core of this programme, to the eye, the user holds any one when point that teacher's pointer (or other rod-like articles) points to projection screen, corresponding cursor just points to this place, press the corresponding left and right press key of teacher's pointer then, cursor will respond action rapidly, thereby realize the function of teacher's pointer, in fact, in the behind of action, relate to complicated localization method, the existing scheme that receives with 4 emission bilaterals illustrates the positioning principle of electronic teacher pointer.
Here, introduce the structure that 4 emission bilaterals receive earlier, as shown in Figure 1: rectangle has efficiency flat AEFD, and limit AE equals limit DF, highly be 3000 millimeters, limit AD equals EF, and width is 4000 millimeters, and AE equals DC, be 2400 millimeters highly, BE equals CF, highly is 600 millimeters.
Every infrared ray receiving light of 10 millimeters installations, at an A, some B puts C, on the some D four infrared lamps is installed respectively on limit AE and DF, and the sequence number of lamp is A, B, C, D.
As lamp A, when lamp B lights, during have no occluder, the receiving light that is installed on the DF limit will all receive signal in the rectangle plane, and at this moment the data output of each lamp is zero.
As lamp C, when lamp D lighted, during have no occluder, the receiving light that is installed on the AE limit was all received signal in the rectangle plane, and at this moment the data output of each receiving light is zero.
Here attention is, ABCD is effective plane area, just throws in this scope when projection, and all naming a person for a particular job guarantees it is effectively, and rectangle BEFC is the subsidiary district, why is provided with the reason in subsidiary district, will carry out detailed argumentation in the back.
To block a little be example there to be one below, carries out further parameter declaration, sees Fig. 2,
The shadow region is for blocking a little among the figure, the infrared light that sends from the A point is during through shelter (being teacher's pointer here), dropped on the DF limit by the retaining zone, to form an interval, last is LA1, and more following is LA2, in like manner, the infrared light that the B point sends is fallen and formed one on the DF limit is the interval on boundary with LB1 to LB2, is noted that here the data output end that drops on interval interior all lamps is 1, so interval outer receiving light output data is 0.
Find out that by Fig. 2 form four lines between two infrared lamps of A, B and the critical point, the A point is A---LA1, A---LA2; The B point is B---LB1, and B---LB2, the intersection point of these four lines are respectively a little 1 and point 2, and A---LA1 and limit AD angle are a1, A---LA2 and AD angle are a2; Angle between B---LB1 and the BC is b1, and the angle between B---LB2 and the BC is b2, below for convenience therebetween, the line segment of LA1 and the formation of D point is called LA1, the line segment that LA2 and D point form is called LA2, and the line segment that LB1 and D point form is called LB1, and the line segment that LB2 and D point form is called LB2, AB and CD height are called H, the wide L that is called with AD, BC and EF demarcates Fig. 3, for making things convenient for the derivation of equation, we only are specifically described putting 1, and other is lit a lamp and analogizes.
By trigonometric function as can be known:
(1)tg?a1＝y1/x1
(2)tg?a1＝LA1/L
(3)tg?b1＝(H-y1)/x1
(4)tg?b1＝(H-LB1)/L
LA1 wherein, LB1, H, L is given data, and y1 and x1 are unknown data
Can obtain by (1) and (2):
y1/x1＝LA1/L
(5)y1＝LA1*x1/L
Can obtain by (3) and (4):
(6)(H-y1)/x1＝(H-LB1)/L
Can obtain by (5) and (6):
(7)x1＝(L*H)/(H-LB1+LA1)
(8)y1＝(LA1*x)/L
In like manner can obtain 2 computing formula:
(9)x2＝(L*H)/(H-LB2+LA2)
(10)y2＝(LA2*x)/L
To put 1 and point 2 average:
(11)x＝(x1+x2)/2
(12)y＝(y1+y2)/2
Thereby know the position of shelter approximate center, the result (x y) is exactly our desired coordinate.
More than be the calculating overall process of finishing a point, this point is measured under the effective situation of A point B point, below we will further analyze situation about occurring in computation process.
As shown in Figure 2, we notice, in rectangle ABCD, do two diagonal line, thereby rectangle ABCD is divided into four Delta Regions, be respectively triangle ABO, triangle BCO, triangle CDO, triangle DAO, we cry them respectively is first district, second district, the 3rd district, the 4th district, when blocking when a little falling first district, this time point C point D data will be effectively, in like manner, when blocking when a little falling second district, this time point B point C data will be effectively, when blocking when a little falling the 3rd district, this time point A point B data will be effectively, when blocking when a little falling the 4th district, this time point D point A data will be effectively, and we yes should pay special attention to, the some computing formula in the same district is not different, in front, we have provided A, the effective computing formula of B point, below, we just provide the formula in whole four districts
First district (the DC point is effective) sees that Fig. 5 computing formula is as follows, and derivation slightly
x1＝L-(H*L/(H_LC1+LD1)) y1＝LD1*(L-x?1)/L
x2＝L-(H*L/(H_LC2+LD2)) y2＝LD1*(L-x2)/L
x＝(x1+x2)/2 y＝(y1+y2)/2
Second district (the BC point is effective) sees that Fig. 6 computing formula is as follows, and derivation slightly
x1＝L/((H-LB1)/(H-LC1)+1) y1＝H-(H-LB1)*x1/L
x2＝L/((H-LB2)/(H-LC2)+1) y2＝H-(H-LB2)*x2/L
x＝(x1+x2)/2 y＝(y1+y2)/2
The 3rd district (the AB point is effective) sees that Fig. 7 computing formula is as follows, and the derivation front describes in detail
x1＝(L*H)/(H-LB1+LA1) y1＝(LA1*x)/L
x2＝(L*H)/(H-LB2+LA2) y2＝(LA2*x)/L
x＝(x1+x2)/2 y＝(y1+y2)/2
The 4th district (the DA point is effective) sees that Fig. 8 computing formula is as follows, and derivation is slightly seen Fig. 7
x1＝L/(LA1/LD1+1) y1＝LA1*x1/L
x2＝L/(LA2/LD2+1) y1＝LA2*x2/L
x＝(x1+x2)/2 y＝(y1+y2)/2
The auxilliary survey distinguished the BEFC explanation, see Fig. 9, if described above is that point is fallen four calculated case in the district, so, when having fallen on diagonal line AC and the diagonal line BD as fruit dot, any situation can appear, if the not auxilliary district that surveys, we can notice, the infrared light of A point emission, has fallen on the outside CF of CD blocked area after the process shelter blocks, that is to say, make that the data of falling the shelter on the diagonal line are effective, if there is not this auxilliary district that surveys, if shelter has been fallen on the diagonal line so, only have a point effective, perhaps four points are completely without imitating (have only when point is positioned at rectangle ABCD center, just this situation may occur), as after the auxilliary survey district, such problem is just avoided a part.Size and size and many relating to parameters in auxilliary survey district, it determines row argumentation again after discussing relative coordinate calculating.
The projection relative position, as shown in figure 10, rectangle HI JK is a projected area, because the big I of projection need adjust with border factually, so, when projected area is adjusted to some extent, just need reorientate.In actual use, when teacher's pointer (or shelter) in projection in zone, at this moment, cursor will work, its position will be the position of teacher's pointer indication.
Have below in conjunction with Figure 11 and to block the explanation that a situation is carried out coordinate conversion, as shown in the figure, have one to block an O and be positioned at the HIJK rectangle, here, rectangle HIJK promptly is the computer screen of our projection, localization method by above introduction, we can obtain a H, I, J, the absolute coordinates of four points of K, acquisition methods is placed on teacher's pointer these four positions exactly, calculates with the localization method of introducing above, after the position of known these four points, if teacher's pointer has been placed on as upper/lower positions O, same method, we can be by calculating the coordinate that O is ordered, and we obtain the resolution of current screen by software then, and the cursor embodiment is screen coordinate (we are called relative coordinate here), we just must be converted to coordinate system like this, as shown in figure 11, pass through coordinate Calculation, we obtain HK, HI, OR, the physical size of OS, the resolution of current screen is M*N, and its relative position is made as x ｀, y ｀ can obtain following corresponding proportionate relationship by figure:
(1)x｀/OR＝M/HK
(2)y｀/OS＝N/HI
Obtain by (1):
x｀＝OR*M/HK
y｀＝OS*N/HI
The x ｀ here, y ｀ be the end product of our needs just, and with these two result notification computer operating systems, operating system will provide the current location of teacher's pointer indication.
In front, simply mention the subsidiary district, the subsidiary district is suitable so, we notice, if there is not the subsidiary district,, shelter forms on the intersection of rectangle, so if being positioned at four emission lamps, in the ordinary course of things, we have only a point effective, and another one is named a person for a particular job and had only part effectively, and a part will be fallen beyond the receiving light zone in addition, so will not receive, this will have influence on the accuracy of location, and in order to simplify calculating, we survey outside the district main, increased the subsidiary district, in order to determine the auxilliary size of surveying the district, referring to Figure 12, the diameter of setting shelter is D, by mathematical analysis, if the auxilliary district that surveys is located at the bottom, so, the least favorable point should be at projection HIJK and two diagonal line AC, on the last intersection of DB, point 1 as shown in the figure and point 2, we notice that point 1 and point 2 alternate position spikes can be similar to sees shelter diameter D as, and G o'clock to 2 o'clock vertical range is S, and the auxilliary district that surveys is CF, has so with also ratio to exist:
D/CF＝S/L
So there is the auxilliary size of surveying the district to should be:
CF＝D*L/S
For example, projection screen distance A B is 1000 millimeters, and the shelter diameter is 100 millimeters, and L length is 4000 millimeters, and the so auxilliary size of surveying the district should be:
The CF=100*4000/1000=400 millimeter, same, if projection HIJK back gauge measurement back gauge is dwindled, the auxilliary district that surveys reduces thereupon, is 500 as projection screen distance A B, and the shelter diameter is 100 millimeters, and L length is 4000 millimeters, and so auxilliary survey district is:
CF＝100*4000/500＝800
Auxilliary setting of surveying the district follows actual installation parameter relevant, can be according to on-the-spot needs customization.See Figure 12,
We can see by above explanation, and blocking object not necessarily is exactly the teacher's pointer head, so long as rod-like articles, or even staff, all can form effective multitudinous retaining, by corresponding data acquisition and computing, last computer operating system will just be automatically moved to cursor immediately blocks the place accordingly.In addition, the emission lamp might not be four, can be a plurality of, but its localization method core is exactly the rarest two emission lamps, a considerable amount of receiving lights of a row realize its localization method.This infrared ray localization method is a kind of innovation, is not all having both at home and abroad at present.
(2) localization method software scenario:
Software comprises the two large divisions, a part is a scm software, a part is to go up microcomputer software, scm software mainly is that two critical reception data that are used for handling effective launching site that data that infrared receiving light adopts will adopt are delivered to microcomputer software by serial ports, last microcomputer software is by corresponding coordinate conversion, the current location of cursor is sent to operating system, thereby realize cursor control function.Process flow diagram is seen Figure 13, Figure 14.
(3) structure of teacher's pointer, see that Figure 15 teacher's pointer funtion part is mainly by the teacher's pointer head, scalable teacher's pointer bar and teacher's pointer are forming, on the teacher's pointer handle, a left button and right button are arranged respectively, the right and left key function of right and left key and mouse is identical, the teacher's pointer head is made by the polyfoam of lightweight, is black, and the teacher's pointer bar is high charcoal fiber rod, teacher's pointer is being made by the plastics that are fit to, right and left key is the dedicated button that meets hommization, inner, a radio transmitter is arranged at teacher's pointer, the right and left key information of teacher's pointer is sent to the radio receiver of computer mouse mouth, thereby realize the control of mouse.
Claims (3)
1 one kinds of infrared ray location mouse teacher's pointers, it is characterized in that: it is by infrared ray location system, teacher's pointer lever system and computer software are formed, the both sides that infrared ray location system is included in projection screen are equipped with far infrared transceiver, four infrared lamps lay respectively at the inside of R-T unit, the infrared lamp is positioned at the top of R-T unit, in R-T unit, every 0.75 centimetre a receiving light is installed from top to bottom, all there is the data acquisition line to link to each other in the bottom of R-T unit with data acquisition controller, and data acquisition unit links to each other with the serial ports of main frame by Serial Port Line, computing machine links to each other with projector equipment by video line, the teacher's pointer lever system comprises the teacher's pointer head, the teacher's pointer bar, two buttons about being equipped with on the teacher's pointer handle, in the inside of teacher's pointer handle a radio transmitting apparatus is housed also, in the mouse of computing machine, a radio system is installed, receives the left and right press key information of teacher's pointer, infrared ray location system and computer control system are finished the infrared ray plane positioning; The teacher's pointer lever system is by the teacher's pointer head, the teacher's pointer bar, the teacher's pointer handle, right and left key on the teacher's pointer handle, radio transmitters in the teacher's pointer handle, and the wireless receiver on the computer mouse mouth is formed, it finish infrared ray block the location and mouse right and left key and teacher's pointer function, finish data acquisition by the Single-chip Controlling plane positioning system, again data are sent to computing machine, finish the calculating and the control of current teacher's pointer head shading light cursor position at last by computer software, data transmission can adopt wire transmission or wireless transmission between single-chip microcomputer and the computing machine, infrared ray blocks localization method and adopts 4 emission bilateral method of reseptances, teacher's pointer is connected with computer wireless, finishing infrared ray blocks and mouse right and left key and teacher's pointer function, the Single-chip Controlling plane positioning system is finished data acquisition, again data are sent to computing machine, finish the calculating of current teacher's pointer head shading light cursor position at last by computer software; When infrared discharge lamps is lighted, the receiving light of the far infrared transceiver on opposite can be received the position of being blocked by the teacher's pointer head accordingly, these two groups of data send to data acquisition controller by the data acquisition line, through data acquisition controller data are carried out Screening Treatment, send to main frame by serial ports then, main frame is handled the data that serial ports comes, obtain a little on far infrared transceiver measurement face, be true origin with the infrared discharge lamps, absolute position in the coordinate system, to put initial point by the software relative set as the projection relative coordinate, as long as when cursor point is to this angle, cursor on the computer screen just arrives this place at once, the position of teacher's pointer head indication is positioned within four points of projection, at this moment, during infrared discharge lamps process teacher's pointer head, form a blocked area that forms by schematic lines, get the position of teacher's pointer head on screen to the end.
2 teacher's pointers according to claim 1 is characterized in that: said infrared ray location system is made up of infrared lamp, infrared ray receiving light, and infrared lamp, infrared ray receiving light all are positioned at same plane.
3. teacher's pointer according to claim 1 is characterized in that: data transmission can adopt wire transmission or wireless transmission between single-chip microcomputer and the computing machine.
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| CNB031325602A CN1282063C (en) | 2003-08-11 | 2003-08-11 | Infrared positioning mouse teacher's pointer |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100423035C (en) * | 2005-04-28 | 2008-10-01 | 廖锦新 | Radio control device and method for multimedium teaching |
| CN100451933C (en) * | 2006-01-10 | 2009-01-14 | 凌广有 | Electronic teacher pointer |
| CN100401112C (en) * | 2006-04-30 | 2008-07-09 | 华南理工大学 | Hemispherical optical lens for plane positioning and plane positioning method thereof |
| CN101387954B (en) * | 2007-09-10 | 2011-06-22 | 汉王科技股份有限公司 | Method for implementing stretchable writing electronic curtain |
| CN101882012A (en) * | 2010-06-12 | 2010-11-10 | 北京理工大学 | Pen type interactive system based on projection tracking |
| JP5853394B2 (en) * | 2011-04-07 | 2016-02-09 | セイコーエプソン株式会社 | Cursor display system, cursor display method, and projector |
| KR102248741B1 (en) * | 2015-01-29 | 2021-05-07 | 삼성전자주식회사 | Display appaeatus and control method thereof |
| CN106023720A (en) * | 2016-05-13 | 2016-10-12 | 李建龙 | Smart pointer for screen marking in projection teaching |
| CN109240516A (en) * | 2018-09-17 | 2019-01-18 | 徐州国宏信息技术有限公司 | A kind of infrared inductor of computer |
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