CN100583011C - Input system and method of braille computer point character based on photo-sensor - Google Patents
Input system and method of braille computer point character based on photo-sensor Download PDFInfo
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- CN100583011C CN100583011C CN200810116754A CN200810116754A CN100583011C CN 100583011 C CN100583011 C CN 100583011C CN 200810116754 A CN200810116754 A CN 200810116754A CN 200810116754 A CN200810116754 A CN 200810116754A CN 100583011 C CN100583011 C CN 100583011C
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Abstract
The invention relates to a Braille computer input system based on a light sensor and a method thereof. The method comprises the following steps: step 91, a user inserts a Braille pen in a Braille hole corresponding to the current braille, and shields the light in the X direction and the Y direction; step 92, the coordinates of the current Braille are obtained according to the light received by an optical receiver in the X direction and an optical receiver in the Y direction, and the information of the current Braille is figured out; on completion of input by one party, the information of all of Brailles in the possession of the party is converted into Braille codes, and the Braille codes are transmitted to a computer; and step 93, the computer converts the Braille codes into letters. The computer braille input system and the method achieve the function of inputting Braille based on a computer, and have the advantages of high versatility, low cost, convenient use and so on, thereby completely conforming to the use habits of blindmen in writing Braille.
Description
Technical field
The present invention relates to computing machine input field, relate in particular to Braille computer pointing words input system and method based on optical sensor.
Background technology
The braille scheme that China generally adopts at present mainly contains two kinds, and a kind of is the braille scheme of nineteen fifty-three being issued and being carried out in the whole nation by the former Ministry of Education, is called for short " prevailing mandarin braille ", and this scheme has 21 initial consonants, 34 simple or compound vowel of a Chinese syllable, circumflex and punctuation marks.It is a standard with Beijing voice, based on mandarin, is unit with the speech, adopts the word link writing rule.Another kind of braille scheme is the braille reform scheme by the tentative popularization of State Language Work Committee's agreement in 1988, be called for short " Chinese double-spelling braille ", this scheme can be represented Chinese sound, rhyme, tone three elements in the blind symbol of two sides, whole system comprises: alphabet, punctuation mark, agreement differential method, write a Chinese character in simplified form method, subsonics character-determining method etc., also adopt the word link writing rule simultaneously.
No matter adopt any braille scheme, they all are to be basic structure with " blind symbol ", arrange by the rule of encoding scheme, and come impression scheme (also being called braille) by sense of touch.Blind symbol is by six salient points
Form, a blind symbol also is called for short one " side ".By having a few on six salient points and not having and a little carry out permutation and combination, just can express corresponding code.
Writing and reading of braille is more special, and writing of braille is to realize by punching (braille) on thicker paper.During braille, earlier paper is pressed in up and down between two layers of a character matrix plate, under the guiding of a character matrix plate, (braille) from right to left according to the braille encoding scheme, punches then; During reading, then the paper that has through hole is turned over, read with the salient point that hand touches on the paper from left to right.
Along with improving constantly of China's level of IT application, computing machine also is used widely in people's work, studying and living.But the I/O mode of at present nearly all information industry product, particularly computing machine is not considered physical disabilities' application demand all at ordinary people's design, and the blind person can't enjoy the facility that infotech is brought as the normal person.The present situation of information products has caused the telecoms gap between blind person and the normal person constantly to enlarge, and makes the survival and development ability of blind person in informationized society be subjected to further restriction, can't really be dissolved in the normal social life.
In order to solve the problem that the blind person imports Chinese character on computers, relevant both at home and abroad manufacturer has released some Related products.Conclude and get up to mainly contain two kinds, a kind of is with the input of the Chinese character input method on common computer braille.
Application number is that 01129619.4 Chinese invention patent application discloses the intelligent Chinese computer system that a kind of blind person uses, main by the personal computer main frame that can surf the Net, microphone, audio amplifier or the earphone that links to each other with each interface of this main frame, scanner, blind person constitute with the hardware of the apparent device of point, printer composition and the software module that is arranged in said main frame and the related hardware.This invention is given full play to the blind person to listen, say, touch ability when using a computer, more natural selectively, operational computations machine more easily.Make reciprocal process hommization more, intellectuality.Give blind person's document process, exchange with the normal person, school for the blind's teachers ' teaching provides instrument.
Application number is that 200410070161.4 Chinese invention patent application discloses a kind of braille-Chinese contrapositive editing and type setting and editing/typesetting method that runs on windows platform.This braille-Chinese contrapositive editing and type setting is by the braille input media, the blind automatic switch of the Chinese, and blind Chinese automatic switch, the Voice Navigation device, printer, the braille imprinter, display, point shows device, and the braille-Chinese contrapositive proofing is formed.This system has multiple input and output function, can realize the automatic translation conversion of the Chinese and the braille of pin-point accuracy, the composing of " What You See Is What You Get " of braille-Chinese contrapositive, braille is proofreaded automatically, simultaneously provide automatic speech to follow function, thereby improved efficient and practicality that braille is set type greatly at the braille user.Steps such as this braille-Chinese contrapositive editing/typesetting method formats by branch, paging and splitting etc. and sets type, contrast automatically, synchro edit, intelligence check and correction have realized the robotization of braille editing and composing work, for braille publishing work is provided convenience.
But obviously existing these input methods are for the blind person, and it is very difficult using.
Another kind method is 6 keys of definition on QWERTY keyboard,, operates three points about three corresponding blind symbols of fingers difference of right-hand man corresponding to six salient points of braille with two hands.
Application number is that 200410006304.5 Chinese invention patent application discloses a kind of set symbol computor-keyboard and signal input system code Design thereof.It is to form symbolic information and the New-type computer keyboard form of operation signal and the system coding design that is used for the input of this kind keyboard signal that the mode of a corresponding set symbol generates and represents to import with the one-touch of corresponding keys.
This keyboard entry method is corresponding with blind symbol, the blind person does not need to spend the too many time to learn comparatively speaking, but because operation the time often needs several fingers head button simultaneously, still very inconvenient, on top of still need the suitable time, input speed also can not be too fast.
Summary of the invention
The object of the present invention is to provide a kind of Braille computer pointing words input system and device based on optical sensor, its highly versatile, cost is low, and is easy to use.
The invention provides a kind of Braille computer pointing words input system, comprise computing machine and braille pen, also comprise the Braille tablet, described Braille tablet is provided with the blind symbol braille module array that is made of blind symbol point word modules, the optical transmitting set of X-direction, the optical transmitting set of Y direction, the optical receiver of X-direction and the optical receiver of Y direction;
Described blind symbol point word modules is provided with the optical channel of directions X, is used for light is sent to from the optical transmitting set of X-direction the optical receiver of X-direction;
Described blind symbol point word modules is provided with the optical channel of Y direction, is used for light is sent to from the optical transmitting set of Y direction the optical receiver of Y direction;
The blind symbol point of on the described blind symbol point word modules each position is provided with a braille hole in Z-direction, and this idea sky penetrates the optical channel of Y direction and the optical channel of X-direction respectively;
Described Braille tablet, be used for the user described braille pen is inserted the braille hole and shelter from X-direction and the light of Y direction after, the light that receives according to the optical receiver of the optical receiver of X-direction and Y direction obtains the coordinate of current blind symbol point and calculates a blind symbol point information of current blind symbol point; When side's end of input, all blind symbol point position information translation that will belong to same side are blind symbol coding, and should be sent to computing machine by blind symbol coding;
Described computing machine, being used for blind symbol code conversion is literal.
Described Braille tablet also comprise general processor, coding circuit, the first Braille processing module and with the interface of compunication;
Described general processor is used for the Braille tablet is controlled, to realize the conversion of blind symbol point position information to the braille coding;
Described coding circuit is used for the coordinate that light that the optical receiver according to the optical receiver of X-direction and Y direction receives is determined blind symbol point;
The first Braille processing module is used for obtaining blind symbol point position information according to the coordinate of blind symbol point position; When side's end of input, all blind symbol point position information that will belong to same side are that blind symbol coding is sent to computing machine.
Described computing machine comprises the second Braille processing module, and being used for blind symbol code conversion is literal.
Described blind symbol point word modules is formed by three layers from top to bottom; Ground floor is a braille point position frame, is provided with the blind symbol point of side position; The second layer is 2 optical channels of Y direction, and is corresponding with the blind symbol point of the row of 2 on first aspect position, and the position of this optical channel lays respectively at the vertical lower of 2 row point position; The 3rd layer is 3 optical channels of X-direction, corresponding with the blind symbol point of the row of 3 on first aspect position, and the position of this optical channel lays respectively at the vertical lower of 3 row point position.
The first Braille processing module comprises: first initialization module, read a position module, some position to the code conversion module, send data module, a coordinate points position mapping table and blind symbol point coding schedule;
Described coordinate points position mapping table is used to describe the mapping relations of coordinate to blind symbol point position information;
Described blind symbol point position coding schedule is used to describe the corresponding relation that blind symbol point position information and blind symbol are encoded;
Described first initialization module is used for the Braille tablet is carried out the initialization setting, calls in blind symbol point position coding schedule and coordinate points position mapping table;
A described position module of reading, be used for the user when described Braille tablet carries out braille, obtain the blind symbol point position information of current blind symbol point position according to the coordinate inquiry coordinate points position mapping table of current blind symbol point, and when determining side point position end of input, call blind symbol point information all in this side point position to the code conversion module;
Described position is used for all blind symbol point position information that belong to same side are read to the code conversion module, obtains corresponding blind symbol coding according to blind symbol coding schedule, and should send to the transmission data module by blind symbol coding;
Described transmission data module is that described blind symbol coding is sent to computing machine.
Described coordinate points position mapping table is preserved the coordinate of blind symbol point position and the pairing binary value of coordinate of this blind symbol point;
Described blind symbol point position coding schedule is preserved described binary value and this two blind symbol that advances the value correspondence is encoded.
The second Braille processing module comprises: second initialization module, receives data module and is encoded to the text conversion module, wherein:
Described second initialization module is used for the second Braille processing module is carried out initialization, and communicating by letter between foundation and the Braille plate;
Described reception data module is used to receive the blind symbol coding that sends from the first Braille processing module; If the current blind symbol coding that receives is not the sentence end mark, then preserve this blind symbol coding, be encoded to the coded text modular converter otherwise call blind symbol;
The described text conversion module that is encoded to is used for and will receives all taking-ups of blind symbol coding that belong to same sentence that data module is preserved, and realizes that blind symbol is encoded to the conversion of literal.
Described braille pen, form by pen stand, penholder, nib and mini button, described nib is embedded in the described penholder, described penholder top has the cavity of an installation mini button, described mini button closely contacts with the top cover of nib, described pen stand is installed in the top of penholder, is fastenedly connected with penholder.
The invention provides a kind of Braille computer pointing words input method, comprising:
Step 91, the user inserts braille pen corresponding braille hole, current blind symbol point position and shelters from X-direction and the light of Y direction;
Step 92, the light that receives according to the optical receiver of the optical receiver of X-direction and Y direction are obtained the coordinate of current blind symbol point and are calculated a blind symbol point information of current blind symbol point; When side's end of input, all blind symbol point position information translation that will belong to same side are blind symbol coding, and should be sent to computing machine by blind symbol coding;
Step 93, computing machine is a literal with blind symbol code conversion.
Comprise before the step 91:
Step 1001: move first initialization module, call in blind symbol point position coding schedule and coordinate points position mapping table;
Step 1002, a position module is read in operation, waits for the input of user's braille;
Step 1003, if the user utilizes braille pen braille on the Braille tablet, then execution in step 91, otherwise carry out 1002.
Step 92 comprises:
Step 1004, a position module is read in operation, and foundation reads the coordinate of current blind symbol point position, and obtains the blind symbol point position information of current blind symbol point position according to this coordinate inquiry coordinate points position mapping table;
Step 1005, operating point position are differentiated current blind symbol point position information and whether are belonged to same side with the current blind symbol point position information of preserving before to the code conversion module, if same side, execution in step 1002, otherwise enter step 1006;
Step 1006 is taken out the blind symbol point position information of all preservations, and inquires about the blind symbol coding that blind symbol point position coding schedule obtains correspondence;
Step 1007, operation sends data module, and the blind symbol of described correspondence is encoded sends to computing machine, and execution in step 1002 is waited for new input.
Step 93 comprises:
Step 1009 is moved the second Braille processing module and is carried out initialization, and communicating by letter between foundation and the Braille plate;
Step 1010, operation receives data module, receives the blind symbol coding of the described correspondence that sends from the Braille tablet; If the blind symbol coding of the current correspondence that receives is not the sentence end mark, then preserve this blind symbol coding, otherwise execution in step 1011;
Step 1011, operation is encoded to the text conversion module, will receive all codings that data module preserves and all take out, and be literal with blind symbol code conversion.
The invention has the beneficial effects as follows: Braille computer pointing words input system of the present invention, be to be control assembly with the microprocessor, constitute the braille input array with blind symbol braille module array on the Braille tablet and optical sensor, pass through the coding circuit and the first Braille processing module again, thereby realized the computing machine braille input function of braille, have advantages such as highly versatile, cost be low, easy to use, meet the use habit that the blind person writes braille at ordinary times fully.
Description of drawings
Fig. 1 is a Braille computer pointing words input system structural representation of the present invention;
Fig. 2 is a Braille tablet circuit diagram in the embodiment of the invention;
Fig. 3 is a braille pen structural representation of the present invention;
Fig. 4 is the first Braille processing module and the second Braille processing module structural representation;
Fig. 5 is a Braille process flowchart of the present invention;
Fig. 6 is the blind symbol braille of a side module diagram.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, a kind of Braille computer pointing words input system of the present invention and device are further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The present invention is directed to the existing problem of present existing Braille input, a kind of Braille computer pointing words input system has been proposed, its ultimate principle is: utilize optical receiver can receive light and carry out the characteristics of opto-electronic conversion, adopt optical transmitting set and optical receiver array, form a cross light sensor network in length and breadth, a some position on the corresponding blind symbol in each point of crossing.When with braille pen on certain point of crossing during braille, vertical and horizontal respectively have one road light to be blocked in the optical sensor net, and like this at optical receiver one end, what be blocked a road does not have signal, and all there is signal on other each roads, just can determine the coordinate of current some word location by coding circuit; Calculate a position information by coordinate position, the blind symbol point position information translation that will import by the second Braille processing module becomes Word message at last, thereby has realized the computing machine braille input function of braille.
As shown in Figure 1, Braille computer pointing words input system of the present invention, comprise computing machine 3, Braille tablet 1, Braille pen 2 is in first Braille processing module (not shown in figure 1) on the Braille tablet 1 and the second Braille processing module (not shown in figure 1) on computing machine 3.
Described Braille tablet 1 is connected with described computing machine 3 by interface.
The described first Braille processing module is used for when the user carries out braille on described Braille tablet 1 the braille input information being handled, and conversion cecutiency symbol coding.
The following describes the making step of Braille computer pointing words input system.
At first, needs according to the reality use, according in the national standard to the technical stipulation of a letter stencil, make a Braille tablet 1, this plate is a printed circuit board, has comprised general processor (MCU), USB (universal serial bus) (USB), Braille module array, optical transmitting set and optical receiver array and coding circuit above.Wherein: general processor is used to control whole device, realizes the conversion of coordinate to the braille coding; USB (universal serial bus) is used to connect computing machine; Optical transmitting set and optical receiver array are formed cross light sensing net in length and breadth; Coding circuit is used for determining the coordinate of some word location.
The second, make a braille input pen 2, as shown in Figure 3, comprise nib 2a, penholder 2b, spring-loaded pushbutton 2c, pen stand 2d, top cover 2e.
The 3rd, the Braille tablet is connected with common computer by USB (universal serial bus) (USB), on computers Braille process software of operation then such as enters at armed state; When the user carried out braille on a letter stencil, computing machine was handled the braille input signal from Braille tablet 1, and converts literal to.
Describe Braille tablet 1 of the present invention below in detail:
General-purpose microprocessor unit (MCU)
Blind symbol braille module array
Optical transmitting set and optical receiver
Coding circuit
Interface circuit (USB)
Power circuit
Each hardware module part and annexation of describing in detail below.
1. general-purpose microprocessor unit
General-purpose microprocessor unit (MCU) on the described Braille tablet is the core component on the plate, is used to control the work of whole plate, selects the ATmega128 single-chip microcomputer of AVR in this example for use.
ATmega128 is a kind of 8 Low-Power CMOS microprocessors based on the AVR risc architecture.ATmega128 has following characteristics: 32 general purpose working registers, 53 universaling I/O port lines, the In-System Programmable Flash of 128K byte, the EEPROM of 4K byte, the SRAM of 4K byte, real-time clock RTC, 4 timer/counters (T/C) that have comparison pattern and PWM function flexibly, two USART, two line interface TWI of byte-oriented, 8 path 10 position ADC, programmable watchdog timer with sheet internal oscillator, the SPI serial port, with the jtag test interface of IEEE 1149.1 standard compatibilities, and the six kinds of battery saving modes that can select by software.
The pin of ATmega128 can be divided into, and the one, power Vcc and ground GND; The 2nd, the I/O port, have 7 groups (A～G), wherein 5 groups (A～E) is 8 two-way I/O mouths, and the 6th group of port (F) is 8 analog input mouth (ADC), also can be used as two-way I/O mouth simultaneously, and the 7th group of port (G) is 5 two-way I/O mouths; The 3rd, other control signal ports.
2. blind symbol braille module array
Blind symbol lattice array on the described Braille tablet, the point word array of on printed circuit board (PCB), arranging, forming by blind symbol point word modules in many ways, in the appendix A of GB GB/T15720-1995, the point of blind symbol footpath, point all there is regulation apart from, square distance and line-spacing.In this example, the distance between the size of each point and the point is arranged according to national standard.
Fig. 6 is the structural representation of the blind symbol point word modules of a side, describes the structure of the blind symbol point word modules of a side below in detail.Blind symbol point word modules 4 in this example is cuboids, forms by three layers from top to bottom.Ground floor is a braille point position frame, the blind symbol point of each module arrangement one side position, totally six blind symbol point 4a; The second layer is the optical channel of Y direction, arranges the optical channel 4b of 2 Y directions, and is corresponding with the blind symbol point of the row of 2 on first aspect position, and the position of optical channel lays respectively at the vertical lower of 2 row point position; The 3rd layer is the optical channel of X-direction, arranges the optical channel 4c of 3 X-directions, corresponding with the blind symbol point of the row of 3 on first aspect position, and the position of optical channel lays respectively at the vertical lower of 3 row point position; Three-decker is nonoverlapping on surface level.In addition, in Z-direction, arrange a braille hole downwards from each blind symbol point position 4a, each braille hole penetrates the Y direction optical channel 4b and the X-direction optical channel 4c of below respectively.
The quantity of the blind symbol braille module array on the tablet is to arrange according to user's needs, has arranged 2 row, 4 row totally 8 sides' blind symbol point word modules in this example.When the blind symbol braille of this 8 side module is arranged, together adjacent between two two, and guarantee that the optical channel of the each side of X-axis and Y-axis aligns, so that light can therefrom pass through.
3. optical transmitting set and optical receiver
According to principle of the present invention, need be at the end emission light of blind symbol braille module array X-axis and Y-axis optical channel, at the other end reception light of optical channel.For this reason, we are arranged in the left side emission light of blind symbol braille module array X-axis in this example, and the right side receives light; Below blind symbol braille module array Y-axis, launch light, receive light up.
Because the blind symbol point word modules of arranging in this example has 8 sides (2 row, 4 row), (each side has 3 to have 6 at the optical channel of X-direction so, totally 2 go), (every side has 2 in Y direction 8 optical channels, totally 4 be listed as), therefore, on the printed circuit board (PCB) of blind symbol braille tablet, 6 light receiving units are arranged on right side at blind symbol braille module array, arrange 8 light receiving units above blind symbol braille module array, each light receiving unit all aligns with each optical channel in the blind symbol braille module array.
Below our Mingguang City's transmitter again.In theory, the quantity of luminescence unit should be consistent with the receiving element quantity of light, and pairing is used and constituted optical sensor like this.In this example,, adopt the mode of sharing luminescence unit by light transmitting fiber, only adopted two luminescence units in order to save cost.Wherein: in X-direction, arrange a luminescence unit, and share this luminescence unit with 6 optical fiber, an end of these 6 optical fiber is positioned on the luminescence unit front end, and the other end of 6 optical fiber is positioned on the optical channel mouth of 6 X-directions respectively; In Y direction, to arrange a luminescence unit, and share this luminescence unit with 8 optical fiber, an end of these 8 optical fiber is positioned on the luminescence unit front end, and the other end of 8 optical fiber is positioned on the optical channel mouth of 8 Y directions respectively.
In this example, light receiving unit is selected common photodiode for use, has 14 (6 row+8 row), and each light receiving unit is connected with coding circuit, constitutes photosensor array.Optical Transmit Unit is selected low-power consumption, microlaser (being similar to laser pointer) cheaply for use, and Optical Transmit Unit directly is connected with power supply.
4. coding circuit
Coding circuit on the described Braille tablet is responsible for photosensor array is encoded.Coding circuit can be selected special coding chip for use, designs according to row/row input, and the input end of each row/row links to each other with each light receiving unit, thereby forms coding circuit.Consider the characteristics of reference point between the blind symbol, the point between the blind symbol of two sides of being separated by can the multiplexing and encoding input port.
In this example, because the general-purpose microprocessor unit of selecting for use (MCU) is the ATmega128 single-chip microcomputer, itself has 53 universaling I/O ports, so coding circuit has directly used 14 universaling I/O ports (PA0～7 on the ATmega128 single-chip microcomputer, PB0～5), saved special coding device like this.
5. interface circuit
Interface circuit on the described Braille tablet be responsible for to be realized and being connected and communicating by letter of described computing machine, and is provided power supply by computing machine for plate.Described interface is a USB (universal serial bus), can be USB or RS-232.
In this example, adopted the CP2102 chip, it is the controller that the integrated USB of a kind of height changes UART (RS-232), can realize USB control function and with the conversion of RS-232.
In this example, the USB port pin of CP2102 chip connects a standard socket, is used for the communication between the computing machine.UART (RS-232) port pinout connects on UART (RS-232) port pinout of ATmega128 spot film machine.
6. power circuit
Interface circuit on the described Braille tablet is responsible for plate working power is provided.Do not adopt independently power supply in this example, but the power supply that directly utilizes USB interface and provided can directly be connected the power pins Vcc of ATmega128 and the pin GND on ground with positive source and the ground of USB.
As shown in Figure 3, describe braille pen 2 of the present invention below in detail
Because the blind person penetrates sense during braille on paper, and can send the sound of " rattling away ", the sensation of picture braille on paper is also arranged when making the blind person import braille on computer point letter stencil, the invention provides a kind of braille pen 2, it is made up of pen stand 2d, penholder 2b, nib 2a, mini button 2c.As shown in Figure 3, described penholder 2b is cylindric hollow barred body, and described nib 2a is the ball pen pointed rod of a diameter less than penholder 2b inner ring, is embedded among the penholder 2b, the top has a circular or square top cover 2e greater than nib 2a, comes off from penholder to prevent nib; Described penholder 2b top has the cavity of an installation mini button 2c; Described mini button 2c closely contacts with the top cover 2e of nib 2a; Described pen stand 2d is installed in the top of penholder 2b, and 2b is fastenedly connected with penholder, is an oval-shaped ball.
The design of pen stand 2d is to hold a pen for the ease of the centre of the palm, nib 2a is used for braille, penholder 2b is used for fixing nib 2a, a miniature button 2c has been installed at the rear portion of nib 2a simultaneously, pen also has a bit downward displacement in braille like this, can send the sound of " rattling away " simultaneously, just follow braille sensation on paper.
Described mini button 2c can be the superminiature button of the G3B15 series of Japanese NIKKAI company.
As shown in Figure 4, the following describes the first Braille processing module 5 and the operation first Braille processing module 6 on computers on the Braille plate of the present invention.
The described first Braille processing module 5 comprises 4 submodules: first initialization module 53, read a position module 54, some position to code conversion module 55, send data module 56, and a coordinate points position mapping table 51 and a blind symbol point coding schedule 52.Wherein:
Described coordinate points position mapping table 51 is used for describing the coordinate of each node of photosensor array and the mapping relations between the some position.Described coordinate points position mapping table is the form of one two row, and first row are coordinates of a position, and secondary series is the pairing position of this a position coordinate binary value.
Described blind symbol point position coding schedule 52 is used to describe the corresponding relation of a position and coding.Described blind symbol point position coding schedule 52 is according to braille coding national standard, the form of one two row of foundation, and first row are encoded radios of a position, secondary series is the represented symbol of this code.For example: preceding four initial consonants in the phonetic plan are expressed as: [3-b], [15-p], [13-m], [11-f].
Preferably, the described Pinyin coding that is encoded to, the corresponding relation employing national standard of some position and Pinyin coding is as GB/T15720-1995.
Described first initialization module 53 is used for Braille tablet 1 is carried out the initialization setting, calls in coordinate points position mapping table 51 and blind symbol point position coding schedule 52.
A described position module 54 of reading, be used to read the braille information on the tablet, when receiving input signal, read this braille information (coordinate data), by looking into coordinate points position mapping table 51, obtain the blind symbol point position information (being its corresponding binary value) of this coordinate correspondence, preserve the data and the point of invocation position of this some position and arrive code conversion module 55.
Preferably, read a position module 54 and do not preserve whole input point positions, just preserve a side some position with 6 storage unit, that is to say that it only keeps the coordinate points position of working as the blind symbol of last side, when reading next side's some position by the time, it has just converted existing some position of preserving to coding, no longer keeps this side's some position, but preserves next side's some position with these 6 storage unit.
Described position is to code conversion module 55, and when determining side's end of input, the institute that will belong to same side has a bit data to read, and then binary value and blind symbol coding schedule is compared, thereby obtains corresponding blind symbol coding, calls and sends data module 56.
Described judgement one side's end of input is whether the some position of the current input of comparison belongs to same side with the some position of importing before, if not the some position end of input of then judging last side.
Described transmission data module 56 is that blind symbol coding is sent to computing machine 6.
The described second Braille processing module 6 comprises 3 submodules: second initialization module 61, receive data module 62, be encoded to text conversion module 63.Wherein:
Described second initialization module 61 is that on computers Braille processing module of operation is carried out initialization, and communicating by letter between foundation and the Braille plate.
Described reception data module 62 is to be used to receive the blind symbol coded message that sends from the Braille plate.If the current coding that receives is not the sentence end mark, then preserve this coding, be encoded to text conversion module 63 otherwise call.
The described text conversion module 63 that is encoded to is to receive all taking-ups of all codings that data module 62 is preserved, and is encoded to the conversion of literal.
As shown in Figure 5, be the course of work of the first Braille processing module, Braille processing flow chart promptly of the present invention.
Braille processing procedure of the present invention comprises the following steps:
Step S1, operation first initialization module is called in coordinate points position mapping table 51 and blind symbol point position coding schedule 52 earlier;
Step S2, a word modules is read in operation, waits for user's braille input;
Step S3 differentiates whether input is arranged, and when receiving input signal, enters step S4, otherwise repeating step S2;
Step S4 reads this braille information (coordinate data), by looking into coordinate points position mapping table 51, obtains the some position of this coordinate correspondence, preserves the data and the execution in step S5 of this some position;
Step S5 differentiates current data and whether belongs to same side with the data of preserving before, if same side, repeating step S2, otherwise enter step 6;
Step S6 takes out the some position of all preservations, and calculates these represented binary values in some position, enters step 7 then;
Step S7 according to the binary value that step 6 calculated, by looking into blind symbol point position coding schedule 52, thereby obtains corresponding codes, enters step 8 again.
Step S8 sends to computing machine 3 with blind symbol coding, and repeating step 2, waits for new input.
Braille computer pointing words input system of the present invention, be based on that photosensor array realizes, by Braille tablet 1, braille pen 2, computing machine 3, form in the first Braille processing module on the Braille tablet 1 and the second Braille processing module on computing machine 3.
In this example, utilize optical receiver can receive light and carry out the characteristics of opto-electronic conversion, adopt optical transmitting set and optical receiver array, forms a cross light sensor network in length and breadth, a some position on the blind symbol of each point of crossing correspondence.When with braille pen on certain point of crossing during braille, vertical and horizontal respectively have one road light to be blocked in the optical sensor net, and like this at optical receiver one end, what be blocked a road does not have signal, and all there is signal on other each roads, just can determine the coordinate of current some word location by coding circuit; Can obtain blind symbol point position information by coordinate and some position mapping table, by the first Braille processing module blind symbol point position information translation cecutiency symbol is encoded again, by the second Braille processing module whole blind symbol code conversion are become Word message at last, thereby realize the computing machine braille input function of braille.It has advantages such as highly versatile, cost be low, easy to use, meets the use habit that the blind person writes braille at ordinary times fully, and prospect has a very wide range of applications.
In conjunction with the accompanying drawings to the description of the specific embodiment of the invention, others of the present invention and feature are conspicuous to those skilled in the art by above.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.
Claims (8)
1, a kind of Braille computer pointing words input system based on optical sensor, comprise computing machine and braille pen, it is characterized in that, also comprise the Braille tablet, described Braille tablet is provided with the blind symbol braille module array that is made of blind symbol point word modules, the optical transmitting set of X-direction, the optical transmitting set of Y direction, the optical receiver of X-direction and the optical receiver of Y direction;
Described blind symbol point word modules is provided with the optical channel of directions X, is used for light is sent to from the optical transmitting set of X-direction the optical receiver of X-direction;
Described blind symbol point word modules is provided with the optical channel of Y direction, is used for light is sent to from the optical transmitting set of Y direction the optical receiver of Y direction;
The blind symbol point of on the described blind symbol point word modules each position is provided with a braille hole in Z-direction, and this braille hole penetrates the optical channel of Y direction and the optical channel of X-direction respectively;
Described Braille tablet, be used for the user described braille pen is inserted the braille hole and shelter from X-direction and the light of Y direction after, the light that receives according to the optical receiver of the optical receiver of X-direction and Y direction obtains the coordinate of current blind symbol point position and calculates a blind symbol point information of current blind symbol point; When side's end of input, all blind symbol point position information translation that will belong to same side are blind symbol coding, and should be sent to computing machine by blind symbol coding;
Described computing machine, being used for blind symbol code conversion is literal;
Described Braille tablet also comprise general processor, coding circuit, the first Braille processing module and with the interface of compunication;
Described general processor is used for the Braille tablet is controlled, to realize the conversion of blind symbol point position information to the braille coding;
Described coding circuit is used for the coordinate that light that the optical receiver according to the optical receiver of X-direction and Y direction receives is determined blind symbol point;
The first Braille processing module is used for obtaining blind symbol point position information according to the coordinate of blind symbol point position; When side's end of input, all blind symbol point position information that will belong to same side are that blind symbol coding is sent to computing machine;
The first Braille processing module comprises: first initialization module, read a position module, some position to the code conversion module, send data module, a coordinate points position mapping table and blind symbol point coding schedule;
Described coordinate points position mapping table is used to describe the mapping relations of coordinate to blind symbol point position information;
Described blind symbol point position coding schedule is used to describe the corresponding relation that blind symbol point position information and blind symbol are encoded;
Described first initialization module is used for the Braille tablet is carried out the initialization setting, calls in blind symbol point position coding schedule and coordinate points position mapping table;
A described position module of reading, be used for the user when described Braille tablet carries out braille, obtain the blind symbol point position information of current blind symbol point position according to the coordinate inquiry coordinate points position mapping table of current blind symbol point, and when determining side point position end of input, call blind symbol point position information all in this side point position and arrive the code conversion module to described;
Described position is used for all blind symbol point position information that belong to same side are read to the code conversion module, obtains corresponding blind symbol coding according to blind symbol point position coding schedule, and should send to the transmission data module by blind symbol coding;
Described transmission data module is that described blind symbol coding is sent to computing machine.
2, Braille computer pointing words input system according to claim 1 is characterized in that, described computing machine comprises the second Braille processing module, and being used for blind symbol code conversion is literal.
3, Braille computer pointing words input system according to claim 1 is characterized in that, described blind symbol point word modules is formed by three layers from top to bottom; Ground floor is a braille point position frame, is provided with the blind symbol point of side position; The second layer is 2 optical channels of Y direction, and is corresponding with the blind symbol point of the row of 2 on first aspect position, and the position of this optical channel lays respectively at the vertical lower of the blind symbol point of 2 row position; The 3rd layer is 3 optical channels of X-direction, corresponding with the blind symbol point of the row of 3 on first aspect position, and the position of this optical channel lays respectively at the vertical lower of the blind symbol point of 3 row position.
4, Braille computer pointing words input system according to claim 1 is characterized in that,
Described coordinate points position mapping table is preserved the coordinate of blind symbol point position and the pairing binary value of coordinate of this blind symbol point;
Described blind symbol point position coding schedule is preserved described binary value and this two blind symbol that advances the value correspondence is encoded.
5, Braille computer pointing words input system according to claim 2 is characterized in that, the second Braille processing module comprises: second initialization module, receive data module and be encoded to the text conversion module, wherein:
Described second initialization module is used for the second Braille processing module is carried out initialization, and communicating by letter between foundation and the Braille tablet;
Described reception data module is used to receive the blind symbol coding that sends from the first Braille processing module; If the current blind symbol coding that receives is not the sentence end mark, then preserve this blind symbol coding, be encoded to the text conversion module otherwise call;
The described text conversion module that is encoded to is used for and will receives all taking-ups of blind symbol coding that belong to same sentence that data module is preserved, and realizes that blind symbol is encoded to the conversion of literal.
6, Braille computer pointing words input system according to claim 1, it is characterized in that, described braille pen, form by pen stand, penholder, nib and mini button, described nib is embedded in the described penholder, and described penholder top has the cavity of an installation mini button, and described mini button closely contacts with the top cover of nib, described pen stand is installed in the top of penholder, is fastenedly connected with penholder.
7, a kind of Braille computer pointing words input method based on optical sensor is characterized in that, comprising:
Step 91, the user inserts braille pen corresponding braille hole, current blind symbol point position and shelters from X-direction and the light of Y direction;
Step 92, the light that receives according to the optical receiver of the optical receiver of X-direction and Y direction are obtained the coordinate of current blind symbol point position and are calculated a blind symbol point information of current blind symbol point; When side's end of input, all blind symbol point position information translation that will belong to same side are blind symbol coding, and should be sent to computing machine by blind symbol coding;
Step 93, computing machine is a literal with blind symbol code conversion;
Comprise before the step 91:
Step 1001: move first initialization module, call in blind symbol point position coding schedule and coordinate points position mapping table;
Step 1002, a position module is read in operation, waits for the input of user's braille;
Step 1003, if the user utilizes braille pen braille on the Braille tablet, then execution in step 91, otherwise carry out 1002;
Step 92 comprises:
Step 1004, a position module is read in operation, and foundation reads the coordinate of current blind symbol point position, and obtains the blind symbol point position information of current blind symbol point position according to this coordinate inquiry coordinate points position mapping table;
Step 1005, operating point position are differentiated current blind symbol point position information and whether are belonged to same side with the current blind symbol point position information of obtaining before to the code conversion module, if same side, execution in step 1002, otherwise enter step 1006;
Step 1006 is taken out the blind symbol point position information that all obtain, and inquires about the blind symbol coding that blind symbol point position coding schedule obtains correspondence;
Step 1007, operation sends data module, and the blind symbol of described correspondence is encoded sends to computing machine, and execution in step 1002 is waited for new input.
8, Braille computer pointing words input method as claimed in claim 7 is characterized in that step 93 comprises:
Step 1009 is moved the second Braille processing module and is carried out initialization, and communicating by letter between foundation and the Braille tablet;
Step 1010, operation receives data module, receives the blind symbol coding of the described correspondence that sends from the Braille tablet; If the blind symbol coding of the current correspondence that receives is not the sentence end mark, then preserve this blind symbol coding, otherwise execution in step 1011;
Step 1011, operation is encoded to the text conversion module, will receive all codings that data module preserves and all take out, and be literal with blind symbol code conversion.
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| CN200810116754A CN100583011C (en) | 2008-07-16 | 2008-07-16 | Input system and method of braille computer point character based on photo-sensor |
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| WO2006096026A1 (en) * | 2005-03-11 | 2006-09-14 | Goldenkey Information Technology Co., Ltd. | Computer for the blind |
| CN2881834Y (en) * | 2005-02-28 | 2007-03-21 | 深圳市王菱科技开发有限公司 | Multifunction braille mould device |
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| CN2881834Y (en) * | 2005-02-28 | 2007-03-21 | 深圳市王菱科技开发有限公司 | Multifunction braille mould device |
| WO2006096026A1 (en) * | 2005-03-11 | 2006-09-14 | Goldenkey Information Technology Co., Ltd. | Computer for the blind |
| CN2935304Y (en) * | 2006-06-06 | 2007-08-15 | 励印龙 | Braille hand-written appliance |
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