CN108446033A - Projecting apparatus handwriting equipment - Google Patents
Projecting apparatus handwriting equipment Download PDFInfo
- Publication number
- CN108446033A CN108446033A CN201810180418.3A CN201810180418A CN108446033A CN 108446033 A CN108446033 A CN 108446033A CN 201810180418 A CN201810180418 A CN 201810180418A CN 108446033 A CN108446033 A CN 108446033A
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- China
- Prior art keywords
- infrared
- pins
- infrared ray
- circuit plate
- fixing piece
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Position Input By Displaying (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a kind of projecting apparatus handwriting equipments, including：Infrared ray matrix, the infrared ray matrix include：Multiple infrared ray sending tubes, one group of infrared transmitter circuit plate, multiple infrared receiver tubes, one group of infrared radiation receiving circuit plate and control module, multiple infrared ray sending tubes are electrically connected with infrared transmitter circuit plate, multiple infrared receiver tubes are electrically connected with infrared radiation receiving circuit plate, infrared transmitter circuit plate is oppositely arranged one by one with infrared radiation receiving circuit plate, infrared ray sending tube is used to complete the transmitting of infrared ray, infrared receiver tube is used to complete the reception of infrared ray, and infrared radiation receiving circuit plate passes through I2C bus protocols are connected with control module communication；And U-shaped fixing piece and shoulder strap；Handwriting equipment disclosed by the invention can be fixed on projecting apparatus or computer display screen by clip, and assembling is flexible, easy to use, and energy conservation and environmental protection, and chalk dust is avoided to fly upward.
Description
Technical field
The present invention relates to display equipment technical field, more particularly to a kind of projecting apparatus handwriting equipments.
Background technology
The display mode that PPT (PowerPoint) is realized by projecting apparatus has been widely used for teaching and gives lessons and work
In report.More common blackboard, which is shown, to be compared, and PPT can easily show picture and table, and can accomplish to give lessons not using
Chalk accomplishes no dust；On the other hand, because projecting apparatus is to beat light to show on calico, blackboard light can be slowed down not
Sufficient or reflective and angle bad the problem of causing.
PPT is labeled and is supplemented however, teacher generally requires during giving lessons, traditional method is to pass through PPT
Included pen-type tool simultaneously coordinates the click of left mouse button to realize that operating process is cumbersome with sliding, and uses expensive capacitance
Touch screen can increase the cost of colleges and universities；And existing infrared ray matrix resolution ratio is relatively low, the use that can not be suitable for teacher needs.
Therefore, how to provide the easy to use, small volume of one kind and the higher projecting apparatus handwriting equipment of resolution ratio is this
The problem of field technology personnel's urgent need to resolve.
Invention content
It is small volume, easy to use in view of this, the present invention provides a kind of projecting apparatus handwriting equipment, it is only necessary in square
Hand-written mapping can be shown on projecting apparatus in battle array.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of projecting apparatus handwriting equipment includes：
Infrared ray matrix, the infrared ray matrix include：Multiple infrared ray sending tubes, one group of infrared transmitter circuit plate,
Multiple infrared receiver tubes, one group of infrared radiation receiving circuit plate and control module, multiple infrared ray sending tubes with it is described
Infrared transmitter circuit plate is electrically connected, and multiple infrared receiver tubes are electrically connected with the infrared radiation receiving circuit plate, described
Infrared transmitter circuit plate is oppositely arranged one by one with the infrared radiation receiving circuit plate, and the infrared ray sending tube is red for completing
The transmitting of outside line, the infrared receiver tube are used to complete the reception of infrared ray, and the infrared radiation receiving circuit plate passes through I2C is total
Wire protocol is connected with control module communication；
U-shaped fixing piece, the U-shaped fixing piece include the first U-shaped fixing piece and the second U-shaped fixing piece, and described first is U-shaped solid
It is opposite with the opening direction of the described second U-shaped fixing piece to determine part, the first U-shaped fixing piece includes the first linkage section, the second company
Section and third linkage section are connect, the second U-shaped fixing piece includes the 4th linkage section, the 5th linkage section and the 6th linkage section, described
Infrared transmitter circuit plate is located inside the described first U-shaped fixing piece, and screw bolt passes are opened close to the described first U-shaped fixing piece
First linkage section, the infrared transmitter circuit plate and the third linkage section at mouthful end are fixed connection；It is described red
Outside line circuit board for receiving is located inside the described second U-shaped fixing piece, and the screw bolt passes are close to the described second U-shaped fixing piece
The 4th linkage section, the infrared transmitter circuit plate and the 6th linkage section of open end are fixed connection；
Shoulder strap, the shoulder strap is located at the side of the infrared ray matrix, for the infrared ray matrix to be fixed on computer
On display screen.
Use the benefit of the device for：Two rows of infrared transmitter plates and infrared radiation receiving circuit plate, constitute infrared square
Infrared ray matrix is fixed on computer display screen by battle array, when use by shoulder strap, and length can be according to practical computer display screen size
It is adjusted, is combined into infrared touch panel with regular display, the wherein infrared transmitting tube of side emits infrared ray, and the other side is red
Outer reception pipe receives infrared ray by judging whether, to judge that the infrared ray sent out whether by object breaks, receives red
Then infrared receiving tube generates low level for outside line, and by object breaks, then infrared receiving tube generates high level, and A/D converter connection is infrared
Reception pipe judges whether there is the infrared matrix of object touch per the voltage value of infrared receiving tube all the way, finally, with A/D by detecting
Converter passes through I2The MCU microcontrollers of C bus communications are filtered data, calculate coordinate value, and by coordinate value
It is sent to host computer by serial ports UART.
Preferably, the position that second linkage section is in close contact with the multiple infrared ray sending tube offers convergence
Hole, a diameter of 1.5mm in the convergence hole；The position that 5th linkage section is in close contact with the multiple infrared receiver tube
Offer convergence hole, a diameter of 1.5mm in the convergence hole.Addition convergence hole can play convergence infrared ray, reduce diverging journey
Degree enhances point-to-point " communication ", improves the effect of anti-interference ability.
Preferably, the multiple infrared ray sending tube or multiple infrared receiver tubes equidistantly arrange, and arrangement spacing is
4mm.It completes to weld in such a way that the distribution spacing and cooperation that infrared emission tube or infrared receiver tube is arranged are vertically arranged
It connects, the resolution ratio of infrared ray matrix can be effectively improved.
Preferably, the control module includes：
MCU microcontrollers, series capacitance C10 between 14 pins and 15 pins of the MCU microcontrollers, and described 14 draw
Foot connects positive pole, the 15 pin ground connection；
USB turns serial port unit, and the MCU microcontrollers turn serial port unit by serial input-output interface (SIO) and the USB
Connection；
Voltage conversion unit, the USB turn serial port unit and are connect with the voltage conversion unit by USB interface；
Power supply selection and program download unit, electric source line interface in the voltage conversion unit and power supply selection and
The input interface of program download unit connects.
Preferably, the USB turns serial port unit and includes：
USB turns serial port chip, and the 1 pin ground connection that the USB turns serial port chip connect with one end of capacitance C8 simultaneously, described
The capacitance C8 other ends connect with 16 pins and connect positive pole；The USB turns 2 pin serial connection connecting valve pipes of serial port chip
D1, the switching tube D1 are sequentially connected in series the first Light-Emitting Diode DS2, first resistor R4, second resistance R3 and second and shine
One end of one end of diode DS3, the second light emitting diode DS3 connects 4 pins；The USB turns 7 pins of serial port chip
And 8 both ends series connection crystal oscillator Y1, the crystal oscillator Y1 between pin shunt capacitance C6 and C7, a conducting wire is drawn between capacitance C6 and C7
Ground connection, 16 pins connect positive pole.
Preferably, the voltage conversion unit includes：
USB port, 1 pin of the USB port and 5 the first polar capacitor of pins in parallel C1, first polar capacitor
C1 is in parallel with the first capacitance C2,2 pins and 3 pins turn 5 pins of serial port chip with the USB and 6 pins are connect；
One end of voltage-stablizer, the first capacitance C2 connects the input terminal of the voltage-stablizer, the GND of the voltage-stablizer
Two output ends of end ground connection, the voltage-stablizer are connected and extraction wire is connect with the second polar capacitor C3, second polarity
The anode of capacitance C3 connects 3.3V and is connected in parallel with the second capacitance C4.
Preferably, the power supply selection and program download unit include：
Needle is arranged, 1 pin of row's needle connects 5V input terminals, and 2 pins connect one end of double-point double-throw switch, the connection of 3 pins
3.3V input terminal；
Button is downloaded, the other end of the double-point double-throw switch connects described one end for downloading button, and draws a letter
The emitter of the collector of number line connecting triode Q1, the triode Q1 is sequentially connected photodiode DS1, the first drop-down electricity
R16 and the second pull down resistor R17 is hindered, a bars is drawn between the first pull down resistor R16 and the second pull down resistor R17
Line is grounded, and a signal line is drawn between the base stage of the triode Q1 and the pull down resistor R16 and connects the download
The other end of button, between the collector and the photodiode DS1 of the triode Q1 drawing a signal line connects electricity
Source anode.
Preferably, the infrared transmitter circuit plate includes：
Single needle stand, 1 pin of the anode single needle stand of the infrared ray sending tube, the 2 of the single needle stand draws
Foot is grounded；
The cathode of current-limiting resistance, the infrared ray sending tube connects one end of the current-limiting resistance, and the current-limiting resistance R
The other end ground connection.Current-limiting resistance is often series in circuit, excessive to prevent electric current to limit the size of place branch current
The concatenated component of institute is burnt out, while current-limiting resistance can also play partial pressure.
Preferably, the infrared radiation receiving circuit plate includes：
A/D converter, the 9 pins ground connection of the A/D converter, 10 pins and 11 pins are hanging, 12 pins ground connection, described
14 pin serial connection resistance R12,15 pin serial connection resistance R13 of A/D converter, and the resistance R12 and the both ends R13 are accessed simultaneously
Positive pole, 13 pins and 16 pins are all connected with positive pole, the I of 14 pins and 15 pins and the MCU microcontrollers2C connects
Mouth connection；
The simulation input pin of A/D converter reads the voltage value of the infrared receiver tube and is converted into digital quantity, leads to
Cross SCL and SDA pins and the MCU micro-controller communications, 10 pins and 11 pins using chip interior reference voltage vacantly not
It connects, 12 and 13 pins are I2Pin is arranged in the addresses C, constitutes 00,01,10 and 11 4 kind of address, i.e. a pair of SCL and SDA can be with
Control four A/D converters.
Pull down resistor R14-R21, a termination 3.3V pressure drops of the infrared receiver tube, the other end connect pull down resistor,
And the analog input end 1-8 that signal wire accesses the A/D converter is drawn between the infrared receiver tube and pull down resistor
Pin.Pull down resistor is clamped in low level by a resistance by uncertain signal, ensures that the detection pin of A/D converter has
High level output.
Preferably, further include having client, the client is used to receive and parse through the coordinate of MCU microcontrollers upload simultaneously
Show hand-written result.
It can be seen via above technical scheme that compared with prior art, the present disclosure provides a kind of projecting apparatus is hand-written
Equipment is fixed in by clip or magnet on computer display screen, and assembling easy for installation is flexible, and infrared matrix volume is small, warp
Ji material benefit, it is only necessary to which hand-written mapping can be shown on projecting apparatus in matrix；The frequency that blackboard is given lessons is reduced, chalk is avoided
Dust is flown upward, and teacher does not have to frequently turn round to write on blackboard.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawings are the structural schematic diagram of projecting apparatus handwriting equipment of the present invention；
Fig. 2 attached drawings are the first U-shaped anchor structure schematic diagram of projecting apparatus handwriting equipment of the present invention；
Fig. 3 attached drawings are the second U-shaped anchor structure schematic diagram of projecting apparatus handwriting equipment of the present invention；
Fig. 4 attached drawings are the MCU microcontroller circuit schematic diagrams of projecting apparatus handwriting equipment of the present invention；
Fig. 5 attached drawings are the infrared transmitter circuit schematic diagram of projecting apparatus handwriting equipment of the present invention；
Fig. 6 attached drawings are the infrared radiation receiving circuit schematic diagram of projecting apparatus handwriting equipment of the present invention；
Fig. 7 attached drawings are that the USB of projecting apparatus handwriting equipment of the present invention turns serial port circuit schematic diagram；
Fig. 8 attached drawings are the 5V-3.3V circuit diagrams of projecting apparatus handwriting equipment of the present invention；
Fig. 9 attached drawings are 5/3.3V power supplies selection and the program download circuit schematic diagram of projecting apparatus handwriting equipment of the present invention；
In Fig. 1-Fig. 9：
1- infrared ray matrixes, 11- infrared ray sending tubes, 12- infrared transmitter circuit plates, 13- infrared receiver tubes, 14-
Infrared radiation receiving circuit plate, 2-U type fixing pieces, the first U-shaped fixing pieces of 21-, the second U-shaped fixing pieces of 22-, the connections of 211- first
Section, the second linkage sections of 212-, 213- third linkage sections, the 4th linkage sections of 221-, the 5th linkage sections of 222-, the connections of 223- the 6th
Section, the first bolts of 23-, the second bolts of 24- 25- restrain hole, 3- shoulder straps.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Referring to attached drawing 1- attached drawings 8, the embodiment of the present invention 1 discloses a kind of projecting apparatus handwriting equipment, including：
Infrared ray matrix 1, infrared ray matrix 1 include：11, one groups of infrared transmitter circuit plates of multiple infrared ray sending tubes
12,13, one groups of infrared radiation receiving circuit plates 14 of multiple infrared receiver tubes and control module 15, multiple infrared ray sending tubes 11 are equal
It is electrically connected with infrared transmitter circuit plate 12, multiple infrared receiver tubes 13 are electrically connected with infrared radiation receiving circuit plate 14, infrared
Line transmitter card 12 is oppositely arranged one by one with infrared radiation receiving circuit plate 14, and infrared ray sending tube 11 is for completing infrared ray
Transmitting, infrared receiver tube 13 are used to complete the reception of infrared ray, and infrared radiation receiving circuit plate 14 passes through I2C bus protocols and control
The communication connection of molding block 15；
U-shaped fixing piece 2, U-shaped fixing piece 2 include the first U-shaped fixing piece 2 and the second U-shaped fixing piece 22, the first U-shaped fixation
Part 21 is opposite with the opening direction of the second U-shaped fixing piece 22, and the first U-shaped fixing piece 21 is connected including the first linkage section 211, second
Section 212 and third linkage section 213, the second U-shaped fixing piece 22 include the 4th linkage section 221, the connection of the 5th linkage section 222 and the 6th
Section 223, infrared transmitter circuit plate 12 is located inside the first U-shaped fixing piece 21, and the first bolt 23 sequentially passes through U-shaped close to first
The first linkage section 211, infrared transmitter circuit plate 12 and third linkage section (213) company of being fixed of 21 open end of fixing piece
It connects；Infrared radiation receiving circuit plate 14 is located inside the second U-shaped fixing piece 22, and the second bolt 24 sequentially passes through U-shaped solid close to second
The 4th linkage section 221, infrared transmitter circuit plate 14 and the 6th linkage section 223 for determining 22 open end of part are fixed connection；
Shoulder strap 3, shoulder strap 3 are located at the side of infrared ray matrix 1.
In some embodiments, infrared ray sending tube 11 or infrared receiver tube 13 select that angle of scattering is 30 °, wavelength is
The round end of 940nm and a diameter of 3mm have side transparent emission pipe and reception pipe.
In some embodiments, opaque acrylic model can be selected in U-shaped fixing piece 2.
Specifically, the position that the second linkage section 212 is in close contact with multiple infrared ray sending tubes 11 offers convergence hole
(25), a diameter of 1.5mm in hole 25 is restrained；It opens the position that 5th linkage section 222 is in close contact with multiple infrared receiver tubes 13
Equipped with convergence hole 25, a diameter of 1.5mm in hole 25 is restrained.
Specifically, multiple infrared ray sending tubes 11 or multiple infrared receiver tubes 13 equidistantly arrange, arrangement spacing is
4mm。
Specifically, control module 15 includes：
MCU microcontrollers, series capacitance C10 between 14 pins and 15 pins of MCU microcontrollers, and 14 pins connect power supply
Anode, 15 pins ground connection；
USB turns serial port unit, and MCU microcontrollers turn serial port unit with USB by serial input-output interface (SIO) and connect；
Voltage conversion unit, USB turn serial port unit and are connect with voltage conversion unit by USB interface；
Power supply selects and program download unit, and the electric source line interface in voltage conversion unit is downloaded with power supply selection and program
The input interface of unit connects.
In some embodiments, it is the microcontroller of IAP15FW4K61S2 that MCU microcontrollers, which select STC15 serial model No.s,.
Specifically, USB turns serial port unit includes：
USB turns serial port chip, and the 1 pin ground connection that USB turns serial port chip connect with one end of capacitance C8 simultaneously, and capacitance C8 is another
One end connect with 16 pins and connects positive pole；USB turns 2 pin serial connection connecting valve pipe D1, switching tube D1 of serial port chip
It is sequentially connected in series one end of the first Light-Emitting Diode DS2, first resistor R4, second resistance R3 and the second light emitting diode DS3,
One end of second light emitting diode DS3 connects 4 pins；USB turns the crystal oscillator Y1 that connects between 7 pins of serial port chip and 8 pins, brilliant
Shake the both ends Y1 shunt capacitance C6 and C7, and a wired earth is drawn between capacitance C6 and C7, and 16 pins connect positive pole.
In some embodiments, USB turns the resistance value of the switching chip that serial port chip selects CH340G usb bus, R3 and R4
Can be 1k, D1 selects the cache switching diodes of model 1N4148, and the capacity of capacitance C6 and C7 can be 33pF.
Specifically, voltage conversion unit includes：
USB port, 1 pin of USB port and 5 the first polar capacitor of pins in parallel C1, the first polar capacitor C1 and first
Capacitance C2 is in parallel, 2 pins and 3 pins turn 5 pins of serial port chip with USB and 6 pins are connect；
Voltage-stablizer, the input terminal of one end connection voltage-stablizer of the first capacitance C2, the ends the GND ground connection of voltage-stablizer, voltage-stablizer
Two output ends are connected and extraction wire connect with the second polar capacitor C3, the second polar capacitor C3 it is positive connect 3.3V and with
Second capacitance C4 is connected in parallel.
In some embodiments, voltage-stablizer selects the model AMS1117-3.3V voltage-stablizers, the capacitance of C1 and C3 can be
4.7μF。
Specifically, power supply selection and program download unit include：
Needle is arranged, 1 pin for arranging needle connects 5V input terminals, and 2 pins connect one end of double-point double-throw switch, and 3 pins connect 3.3V
Input terminal；
Button is downloaded, one end of button is downloaded in the other end connection of double-point double-throw switch, and draws signal line connection
The emitter of the collector of triode Q1, triode Q1 is sequentially connected photodiode DS1, the first pull down resistor R16 and second
Pull down resistor R17 draws signal line ground connection, triode Q1 between the first pull down resistor R16 and the second pull down resistor R17
Base stage and pull down resistor R16 between draw a signal line connection download button the other end, in the collector of triode Q1
A signal line is drawn between photodiode DS1 connects positive pole.
In some embodiments, triode Q1 is NPN type diode,
Specifically, infrared transmitter circuit plate 22 includes：
Single needle stand, 1 pin of the single needle stand of anode of infrared ray sending tube 11, the 2 pins ground connection of single needle stand；
Current-limiting resistance, one end of the cathode connection current-limiting resistance of infrared ray sending tube 11, and another termination of current-limiting resistance R
Ground.
In some embodiments, the resistance value of current-limiting resistance can be 100 Ω.
Specifically, infrared radiation receiving circuit plate 24 includes：
A/D converter, the 9 pins ground connection of A/D converter, 10 pins and 11 pins are hanging, 12 pins ground connection, A/D conversions
14 pin serial connection resistance R12,15 pin serial connection resistance R13 of device, and positive pole is accessed in the both ends resistance R12 and R13 simultaneously, 13
Pin and 16 pins are all connected with positive pole, the I of 14 pins and 15 pins and MCU microcontrollers2C interface connects；
Pull down resistor R14-R21, a termination 3.3V pressure drops of infrared receiver tube 23, the other end connect pull down resistor, and
The analog input end 1-8 pins of signal wire access A/D converter are drawn between infrared receiver tube and pull down resistor.
In some embodiments, A/D converter selects the A/D converter with 8 channels, model ADS7830, drop-down electricity
The resistance value for hindering R14-R21 can be 1k.
Specifically, further including having client, client is used to receive and parse through the coordinate of MCU microcontrollers upload and display
Hand-written result.
When in use, it is two rows of infrared right to be arranged on computer display screen for projecting apparatus handwriting equipment disclosed by the embodiments of the present invention
Pipe, constitutes infrared matrix, and the infrared transmitting tube transmitting that infrared matrix is fixed on wherein side on computer display screen by shoulder strap is red
Whether outside line, other side infrared receiving tube receive infrared ray by judging whether, to judge the infrared ray sent out by object
It blocks, receiving infrared ray, then infrared receiving tube generates low level, and by object breaks, then infrared receiving tube generates high level, 8 tunnels 8
Position analog quantity is converted into 8 road infrared receiving tube of digital quantity chip A/D chip ADS7830 connections, by detecting per infrared receiver all the way
The voltage value of pipe judges whether there is object and touches infrared matrix.Finally, pass through I with ADS78302The MCU microcontrollers of C bus communications
Device IAP15W4K61S2, is filtered data, calculates coordinate value, and coordinate value is sent to visitor by serial ports UART
Family end, and show practical setting-out result.
Embodiment 2
By taking 14 inches of display screen as an example, size 312.1mm*175.6mm, herein rounding is 320mm*176mm.
In the embodiment of the present invention 2, the angle of scattering of a diameter of 3mm of the infrared tube, infrared tube are 30 °, and are emitted
Thickness of pipe 5.4mm receives thickness of pipe 2.7mm.
Angle of scattering and the calculation formula of interference distance are：Interfere radius R=interference distances L*sin (angle of scattering/2)；
Before installing convergence hole additional, R=176.0mm*sin15 ° of radius=45.6mm is interfered；
After installing convergence hole additional, scatteringangleθ=arctan (0.75/5.4)=7.9 ° interferes R=176.0*sin7.9 ° of radius
=24.2mm.It can be seen that convergence hole can play certain anti-interference ability.
Embodiment 3
By taking 14 inches of display screen as an example, size 312.1mm*175.6mm, herein rounding is 320mm*176mm, and is showed
Some PCB circuit board solder joints cause infrared tube that need to occupy the width of 5.08mm,
The calculation formula of resolution ratio is：(display screen length L* display screens width)/infrared tube width；
If in the case of above-mentioned pcb board, resolution ratio only has 63*35, and resolution ratio is relatively low at this time；
To improve resolution ratio, the embodiment of the present invention 3 improves the design of traditional PCB plate, and design distribution spacing is 4mm, and is led to
It crosses the mode being vertically arranged to complete to weld, resolution ratio at this time is 80*44, and resolution ratio is improved significantly.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. a kind of projecting apparatus handwriting equipment, which is characterized in that including：
Infrared ray matrix (1), the infrared ray matrix (1) include：Multiple infrared ray sending tubes (11), one group of infrared ray send electricity
Road plate (12), multiple infrared receiver tubes (13), one group of infrared radiation receiving circuit plate (14) and control module (15), it is multiple described
Infrared ray sending tube (11) is electrically connected with the infrared transmitter circuit plate (12), multiple infrared receiver tubes (13) with
Infrared radiation receiving circuit plate (14) electrical connection, the infrared transmitter circuit plate (12) and the infrared radiation receiving circuit plate
(14) it is oppositely arranged one by one, the infrared ray sending tube (11) is used to complete the transmitting of infrared ray, the infrared receiver tube
(13) it is used to complete the reception of infrared ray, the infrared radiation receiving circuit plate (14) passes through I2C bus protocols and the control mould
Block (15) communication connection；
U-shaped fixing piece (2), the U-shaped fixing piece (2) include the first U-shaped fixing piece (21) and the second U-shaped fixing piece (22), institute
It is opposite with the described second U-shaped opening direction of fixing piece (22) to state the first U-shaped fixing piece (21), the first U-shaped fixing piece
(21) include the first linkage section (211), the second linkage section (212) and third linkage section (213), the second U-shaped fixing piece
(22) include the 4th linkage section (221), the 5th linkage section (222) and the 6th linkage section (223), the infrared transmitter circuit plate
(12) it is internal to be located at the described first U-shaped fixing piece (21), the first bolt (23) sequentially passes through close described first U-shaped fixing piece
(21) first linkage section (211), the infrared transmitter circuit plate (12) and the third linkage section (213) of open end
Be fixed connection；The infrared radiation receiving circuit plate (14) is located at the described second U-shaped fixing piece (22) inside, the second bolt
(24) the 4th linkage section (221) close to the described second U-shaped fixing piece (22) open end, infrared ray hair are sequentially passed through
Circuit board (14) and the 6th linkage section (223) is sent to be fixed connection；
Shoulder strap (3), the shoulder strap (3) are located at the side of the infrared ray matrix (1).
2. a kind of projecting apparatus handwriting equipment according to claim 1, it is characterised in that：Second linkage section (212) with
The position that the multiple infrared ray sending tube (11) is in close contact offers convergence hole (25), described to restrain a diameter of of hole (25)
1.5mm；
The position that 5th linkage section (222) is in close contact with the multiple infrared receiver tube (13) offers convergence hole
(25), a diameter of 1.5mm of convergence hole (25).
3. a kind of projecting apparatus handwriting equipment according to claim 1, which is characterized in that the multiple infrared ray sending tube
(11) it is equidistantly arranged between, arrangement spacing is 4mm；
It is equidistantly arranged between multiple infrared receiver tubes (13), arrangement spacing is 4mm.
4. a kind of projecting apparatus handwriting equipment according to claim 1, it is characterised in that：The control module (15) includes：
MCU microcontrollers, series capacitance C10 between 14 pins and 15 pins of the MCU microcontrollers, and 14 pin connects
Positive pole, the 15 pin ground connection；
USB turns serial port unit, and the MCU microcontrollers turn serial port unit with the USB by serial input-output interface (SIO) and connect；
Voltage conversion unit, the USB turn serial port unit and are connect with the voltage conversion unit by USB interface；
Power supply selects and program download unit, and the electric source line interface in the voltage conversion unit is selected with the power supply and program
The input interface of download unit connects.
5. a kind of projecting apparatus handwriting equipment according to claim 4, which is characterized in that the USB turns serial port unit and includes：
USB turns serial port chip, and the 1 pin ground connection that the USB turns serial port chip connect with one end of capacitance C8 simultaneously, the capacitance
The C8 other ends connect with 16 pins and connect positive pole；The USB turns 2 pin serial connection connecting valve pipe D1 of serial port chip,
The switching tube D1 is sequentially connected in series the first Light-Emitting Diode DS2, first resistor R4, second resistance R3 and the second light-emitting diodes
One end of one end of pipe DS3, the second light emitting diode DS3 connects 4 pins；The USB turns 7 pins and 8 of serial port chip
Connect the both ends crystal oscillator Y1, the crystal oscillator Y1 shunt capacitance C6 and C7 between pin, and a conducting wire is drawn between capacitance C6 and C7 and is connect
Ground, 16 pins connect positive pole.
6. a kind of projecting apparatus handwriting equipment according to claim 4 or 5, which is characterized in that the voltage conversion unit packet
It includes：
USB port, 1 pin of the USB port and 5 the first polar capacitor of pins in parallel C1, the first polar capacitor C1 with
First power input connects, and the first polar capacitor C1 is in parallel with the first capacitance C2,2 pins and 3 pins and the USB
Turn 5 pins and the connection of 6 pins of serial port chip；
One end of voltage-stablizer, the first capacitance C2 connects the input terminal of the voltage-stablizer, the GND terminations of the voltage-stablizer
Two output ends on ground, the voltage-stablizer are connected and extraction wire is connect with the second polar capacitor C3, second polar capacitor
C3 connect with second source input terminal and is connected in parallel with the second capacitance C4.
7. a kind of projecting apparatus handwriting equipment according to claim 4, which is characterized in that the power supply selection and program are downloaded
Unit includes：
Needle is arranged, 1 pin of row's needle connects power input one, and 2 pins connect one end of double-point double-throw switch, the connection of 3 pins
Power input two；
Button is downloaded, the other end of the double-point double-throw switch connects described one end for downloading button, and draws a signal line
The emitter of the collector of connecting triode Q1, the triode Q1 is sequentially connected photodiode DS1, the first pull down resistor
R16 and the second pull down resistor R17 draws a signal line between the first pull down resistor R16 and the second pull down resistor R17
Ground connection is drawn the signal line connection download and is pressed between the base stage of the triode Q1 and the pull down resistor R16
The other end of key, between the collector and the photodiode DS1 of the triode Q1 drawing a signal line connects power supply
Anode.
8. a kind of projecting apparatus handwriting equipment according to claim 1, which is characterized in that the infrared transmitter circuit plate
(22) include：
The anode of single needle stand, the infrared ray sending tube (11) connects 1 pin of the single needle stand, the single needle stand
2 pins are grounded；
The cathode of current-limiting resistance, the infrared ray sending tube (11) connects one end of the current-limiting resistance, and the current-limiting resistance R
The other end ground connection.
9. a kind of projecting apparatus handwriting equipment according to claim 1, which is characterized in that the infrared radiation receiving circuit plate
(24) include：
A/D converter, the 9 pins ground connection of the A/D converter, 10 pins and 11 pins are hanging, 12 pins ground connection, the A/D
Electricity is accessed in 14 pin serial connection resistance R12,15 pin serial connection resistance R13, and the resistance R12 of converter and the both ends R13 simultaneously
Source anode, 13 pins and 16 pins are all connected with positive pole, the I of 14 pins and 15 pins and the MCU microcontrollers2C interface
Connection；
Pull down resistor R14-R21, a termination positive pole of the infrared receiver tube (13), the other end connect pull down resistor,
And the analog input end 1-8 that signal wire accesses the A/D converter is drawn between the infrared receiver tube and pull down resistor
Pin.
10. according to a kind of projecting apparatus handwriting equipment of claim 1-9 any one of them, which is characterized in that further include having client
End, the client are used to receive and parse through the coordinate that the MCU microcontrollers upload and show hand-written result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810180418.3A CN108446033B (en) | 2018-03-05 | 2018-03-05 | Projector handwriting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810180418.3A CN108446033B (en) | 2018-03-05 | 2018-03-05 | Projector handwriting equipment |
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| Publication Number | Publication Date |
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| CN108446033A true CN108446033A (en) | 2018-08-24 |
| CN108446033B CN108446033B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810180418.3A Expired - Fee Related CN108446033B (en) | 2018-03-05 | 2018-03-05 | Projector handwriting equipment |
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| CN1529257A (en) * | 2003-10-10 | 2004-09-15 | 山西大学 | Electronic board teaching device and its operating and controlling method |
| CN201109299Y (en) * | 2007-10-25 | 2008-09-03 | 蔡洪发 | Modified infrared electronic whiteboard |
| CN201266365Y (en) * | 2008-09-12 | 2009-07-01 | 中山佳时光电科技有限公司 | Touch control electronic instruction device |
| CN201449666U (en) * | 2009-05-14 | 2010-05-05 | 中山新亚洲电业有限公司 | Touch-control electronic teaching device |
| CN101847064A (en) * | 2010-05-09 | 2010-09-29 | 中山佳时光电科技有限公司 | Embedded PC electronic whiteboard |
| CN106066519A (en) * | 2016-07-08 | 2016-11-02 | 天津市立孚光电线缆开发有限公司 | A kind of parallel reinforcement optical cable guide |
| CN207037400U (en) * | 2017-07-14 | 2018-02-23 | 上海易教信息科技有限公司 | A kind of control circuit of wisdom blackboard |
-
2018
- 2018-03-05 CN CN201810180418.3A patent/CN108446033B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529257A (en) * | 2003-10-10 | 2004-09-15 | 山西大学 | Electronic board teaching device and its operating and controlling method |
| CN201109299Y (en) * | 2007-10-25 | 2008-09-03 | 蔡洪发 | Modified infrared electronic whiteboard |
| CN201266365Y (en) * | 2008-09-12 | 2009-07-01 | 中山佳时光电科技有限公司 | Touch control electronic instruction device |
| CN201449666U (en) * | 2009-05-14 | 2010-05-05 | 中山新亚洲电业有限公司 | Touch-control electronic teaching device |
| CN101847064A (en) * | 2010-05-09 | 2010-09-29 | 中山佳时光电科技有限公司 | Embedded PC electronic whiteboard |
| CN106066519A (en) * | 2016-07-08 | 2016-11-02 | 天津市立孚光电线缆开发有限公司 | A kind of parallel reinforcement optical cable guide |
| CN207037400U (en) * | 2017-07-14 | 2018-02-23 | 上海易教信息科技有限公司 | A kind of control circuit of wisdom blackboard |
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| Publication number | Publication date |
|---|---|
| CN108446033B (en) | 2020-10-30 |
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