CN106781881B - Pulling type braille point display device and component multiplexing method - Google Patents
Pulling type braille point display device and component multiplexing method Download PDFInfo
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- CN106781881B CN106781881B CN201710034430.9A CN201710034430A CN106781881B CN 106781881 B CN106781881 B CN 106781881B CN 201710034430 A CN201710034430 A CN 201710034430A CN 106781881 B CN106781881 B CN 106781881B
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- 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
- G09B21/00—Teaching, or communicating with, the blind, deaf or mute
- G09B21/001—Teaching or communicating with blind persons
- G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays
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- 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
- G09B21/00—Teaching, or communicating with, the blind, deaf or mute
- G09B21/001—Teaching or communicating with blind persons
- G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays
- G09B21/004—Details of particular tactile cells, e.g. electro-mechanical or mechanical layout
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Abstract
A pulling type Braille point display device and a component multiplexing method use a brand new thought and method to design the Braille point display device with low cost and strong practicability. The traction type Braille point display device consists of eight point display arrays which are arranged in a straight line from top to bottom, a surface material layer, a capacity value detection layer, a magnetic layer, a guide layer, a fixed layer, a steel wire, a push-pull type electromagnet, a capacity value detection circuit and a core processor. A point display array is composed of three rows and two columns of six Braille points, and each Braille point comprises: round-head thimble, spring, steel wire line. The round-head thimble consists of a thimble column, a round head, a connecting sheet and a connecting groove, and the round-head thimble respectively penetrates through the surface material layer, the volume value detection layer, the magnetic layer and the guide layer from top to bottom. The component multiplexing method is a power source component multiplexing method based on a capacity value detection technology and comprises a mechanical component multiplexing scheme and a software multiplexing algorithm.
Description
Technical Field
The invention belongs to the field of blind education equipment, and particularly relates to a traction type Braille point display device and a component multiplexing method.
Technical Field
Blind people cannot normally read by naked eyes, and generally obtain information by means of hearing sound perception and braille point touch reading, so that the braille point touch reading with high efficiency is always a skill which each blind person must master. Each square of braille includes six point locations, which are arranged in three rows and two columns at a prescribed interval.
At present, the information carriers of the braille are mainly divided into two types, the first type is the traditional braille books, the second type is paperless braille point display devices, and compared with the traditional braille books, the braille point display devices have the advantages of large capacity, repeatability, resource saving, high efficiency and the like which are incomparable with the traditional braille books. In the field of braille reading, the demand of braille point display equipment is continuously rising along with the continuous development of informatization, and people urgently need a high-quality and low-price braille point display device to fill up the huge vacancy in the market. At present, braille point display devices (such as Qinghua V3) with larger market share in the market are driven based on piezoelectric ceramics, and the high cost of a single ceramic piezoelectric chip causes the selling price of the whole machine to be high, so that the equipment is difficult to really realize large-scale popularization.
Currently, braille dot display devices on the market can be mainly classified into the following categories: piezoelectric ceramic type, temperature control type, electric stimulation type, mechanical displacement type and electromagnetic pushing type. Different types of braille pointing devices have their own advantages and disadvantages, but most of them cannot achieve the effect of simultaneously considering both the practicability and the low cost.
The assembly multiplexing method refers to a method for controlling a plurality of identical elements by using a single power source, and the five Braille display devices are not designed and use the assembly multiplexing method, which also causes the relative low efficiency of the internal display elements and the waste of resources.
At present, no relevant report of the traction type braille point display device exists in the market.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a pulling type braille display device and a component multiplexing method, which use a completely new concept and method to design a braille display device with low cost and strong practicability.
The invention is completed by adopting the following technical scheme:
the traction type braille point display device consists of eight point display arrays which are arranged in a row from top to bottom, a surface material layer, a capacity value detection layer, a magnetic layer, a guide layer, a fixed layer, a steel wire, a push-pull type electromagnet, a capacity value detection circuit and a core processor, wherein 6X8 through holes are formed in the surface material layer, the capacity value detection layer, the magnetic layer, the guide layer and the fixed layer. A point display array is composed of three rows and two columns of six Braille points, and each Braille point comprises: round-head thimble, spring, steel wire line. The round-head thimble consists of a thimble column, a round head, a connecting sheet and a connecting groove, and the round-head thimble respectively penetrates through the surface material layer, the volume value detection layer, the magnetic layer and the guide layer from top to bottom. The top end of the spring is wound on the connecting groove of the connecting sheet, and the bottom end of the spring is vertically welded on the upper surface of the fixed layer.
The component multiplexing method is a power source component multiplexing method based on a capacity value detection technology and comprises a mechanical component multiplexing scheme and a software multiplexing algorithm. The multiplexing software algorithm can store the Braille codes in variables with the numbers from 1 to 8 in sequence respectively after a core processing program detects the position information of the point display array touched and read by the blind person, and the Braille codes stored in the corresponding variables are displayed on all the point display arrays according to the finger touch and read position; the mechanical assembly multiplexing scheme can use six push-pull electromagnets to complete the control of forty-eight Braille points corresponding to the eight-square point display array.
The invention has the further improvement that the diameter of the connecting sheet is 2.4mm, the diameter of the round head is 2mm, the diameter of the thimble column is 1mm, the diameter of all through holes on the surface material layer is 2mm, the diameter of all through holes on the magnetic layer is 2.2mm, the diameter of all through holes on the capacity value detection layer is 2.2mm, the diameter of all through holes on the guide layer is 2.6mm, and the diameter of all through holes on the fixed layer is 1.6mm. The diameter of the through hole of the fixed layer is larger than that of the thimble column but smaller than that of the connecting sheet, so that the bottom of the round-head thimble cannot fall out; all via hole apertures on magnetic layer, appearance value detection layer and the surface material layer all are less than the diameter of connection piece, have guaranteed that the top of button head thimble can not pop out.
The present invention is further improved in that the magnetic layer uses a rubber soft magnetic plate material which is excellent in magnetic adsorption characteristics and is easy to process.
The invention has the further improvement that the round head and the thimble column of the round head thimble are made of plastic materials, and the connecting sheet is made of iron materials and can be adsorbed on the magnetic layer, so that the touch feeling of the Braille point positions is enhanced. Four connecting grooves are designed on the connecting piece and are used for connecting the steel wire and the spring.
The invention is further improved in that the steel wire is 304 stainless steel superfine steel wire with the diameter of only 0.4mm.
The invention is further improved in that the position resetting of the Braille points is completed by combining the electromagnet and the spring. When the Braille is set, the electromagnet pulls the steel wire to enable the round-head thimble to move downwards so as to enable the Braille point position to be sunken; when the Braille point is reset, the round-head thimble can be ejected upwards by the resilience force of the spring, so that the Braille point is raised.
Compared with the prior art, the invention has the following advantages:
the invention realizes a novel traction type braille point display device, which performs setting motion by traction of the round-head thimble through the steel wire and completes the resetting motion of one braille point by combining a spring resetting method.
The invention uses a brand-new component reuse method, so that the power source can work for different point display arrays in different time periods instead of being in an idle state, the product volume is reduced by times, the product cost is saved, the use efficiency of the power source is improved, and theoretically, the power source efficiency of the device is eight times that of the traditional point display device.
According to the invention, by means of the capacitance value detection technology, the real-time position of the finger of the blind person reader can be obtained, the refreshing speed and controllability are improved, and the reading experience of the blind person reader is improved.
The mechanical parts adopted by the invention are standard parts, so that the complicated mechanical design and processing steps are omitted, the yield of products can be improved during assembly and processing, and the cost of equipment is reduced.
The processor adopted by the invention is an ARM core processor, has high universality and strong transportability, and is convenient for further development by developers.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is an exploded assembly view of the structural principles of the present invention;
FIG. 2 is a three-dimensional assembly drawing of the structural principle of the present invention;
FIG. 3 is a schematic top view of the structure of the present invention;
FIG. 4 is a structural view of the round nose thimble of the present invention;
FIG. 5 is a through hole position numbering diagram according to the present invention;
FIG. 6 is a schematic block diagram of the system of the present invention;
FIG. 7 is a system software flow diagram of the present invention.
In FIG. 1, 101 is a surface material layer, 102 is a through hole, 103 is a dot display array, 104 is a capacitance detection layer, 105 is a magnetic layer, 106 is a round head, 107 is a connecting sheet, 108 is a connecting groove, 109 is a thimble column, 110 is a round head thimble, 111 is a guide layer, 112 is a spring, 113 is a fixed layer, 114 is a steel wire, 115 is a winding column, 116 is an electromagnet.
Description of the preferred embodiment
The invention comprises a pulling type braille point display device and a component multiplexing method thereof. The dragging type braille point display equipment consists of a core processor, a capacity value detection circuit and a driving assembly, wherein the core processor performs information interaction with the IIC protocol and the capacity value detection circuit, sends a driving signal to the driving assembly through an IO port, and the driving assembly drives the point display array 103. The component multiplexing method comprises a mechanical component multiplexing scheme and a component multiplexing algorithm. The invention has the main functions of firstly converting electronic book resources into Braille codes and then realizing the display of Braille point positions by steel wire traction, spring reset, magnetic retention, volume value detection and component multiplexing methods.
The core processor adopts an ARM processor, and has the advantages of high capacity, high speed, strong universality and the like. As shown in fig. 6, the processor converts the electronic book resource pre-stored in the processor into braille codes, and then sends back a position signal of the value variable capacitor in combination with the received capacitance value detection circuit, and after analysis and processing, calls a component multiplexing algorithm to send a control signal to the relay to control the electromagnet 116, thereby realizing the driving of the point display array 103 in a multiplexing manner.
The capacitance value detection circuit is characterized in that a core integrated circuit device of the capacitance value detection circuit is a capacitance value detection chip and has the function of detecting capacitance change caused by touch of a human hand. As shown in FIG. 1, capacitance detection layer 104 is a printed circuit board comprised of a piece of capacitance detection chip and other leads and copper-clad areas. When a user touches any one of the eight point display arrays 103, the capacitance value of the area of the touch point display array 103 changes, the capacitance value change is transmitted to the capacitance value detection chip on the capacitance value detection layer 104 through the connection part, and the chip further feeds back a signal to the ARM processor after processing, so that the real-time detection of the touch reading position is realized.
Wherein the assembly is driven. The drive assembly includes: round-head thimble 110, spring 112, steel wire 114 and electromagnet 116. As shown in fig. 4, the round-head thimble 110 is composed of a thimble column 109, a round head 106, a connecting piece 107 and a connecting groove 108, the round-head thimble 110 is fixedly inserted into the connecting piece 107 along the axial direction, so that the round head 106, the connecting piece 107 and the thimble column 109 are a fixed whole, four connecting grooves 108 are circumferentially arranged at intervals on the connecting piece 107, and the connecting grooves 108 are used for connecting with a spring 112 and a steel wire 114. As shown in fig. 1, the pogo pin 110 sequentially passes through the surface material layer 101, the capacitance detection layer 104, the magnetic layer 105, and the guiding layer 111 from top to bottom. The top end of the spring 112 is wound and connected on the link groove 108 of the connecting piece 107; the bottom end of the spring 112 is vertically welded to the upper surface of the fixed layer 113. One end of the steel wire 114 is wound on the thimble 110 through the connecting slot 108, and the other end is wound on the winding post 115. As shown in fig. 3 and 2, the electromagnet 116 is a push-pull electromagnet, and after the relay is powered on, the winding post 115 is retracted in a direction away from the dot display array 103, so that the round-head thimble 110 can be pulled to move downwards to recess the braille points; when the relay is powered off, the electromagnet 116 loses force and releases in the direction close to the point display array 103, and at the moment, the round-head thimble 110 is pushed out upwards under the driving of the spring 112, so that the Braille point position is raised. The magnetic layer 105 can attract the iron connecting sheet 107 to enable the iron connecting sheet to be tightly adhered to the bottom of the magnetic layer 105, so that the round head 106 is not easy to press down when the blind reads.
The diameter of connection piece 107 is 2.4mm, and the button head diameter is 2mm, and thimble post diameter is 1mm, and the diameter of all through-holes 102 is 2mm on surface material layer 101, and all via hole diameters are 2.2mm on the magnetic layer 105, and all via hole diameters are 2.2mm on appearance value detection layer 104, and all via hole diameters are 2.6mm on guide layer 111, and the diameter of all via holes is 1.6mm on fixed layer 113. According to the above aperture, the spring 112 will drive the connecting sheet 107 and further drive the whole pogo pin 110 to move in the via hole of the guiding layer 111, and because the diameter of the via hole of the fixing layer 113 is larger than the diameter of the pogo pin 109 but smaller than the diameter of the connecting sheet 107, the fixing layer can limit the downward movement track of the pogo pin 110 in the via hole of the guiding layer 111, and the apertures of all the via holes on the magnetic layer 105, the capacitance value detection layer 104 and the surface material layer 101 are smaller than the diameter of the connecting sheet 107, so the upward movement track of the connecting sheet is also limited in the via hole of the guiding layer 111.
Wherein, the component multiplexing method. The blind person has a very important characteristic when reading the braille by touch, namely the blind person can only read one character at a time and cannot simultaneously read a plurality of characters at a time, so the equipment only needs to know which character the blind person reads by touch when and then point and display the character. The conventional braille alphabet display device can refresh the plurality of dot display arrays 104 by using a plurality of power sources, respectively, because it does not know when the blind touches which character. The invention adopts a capacity value detection technology, and the capacity value detection layer 104 and the capacity value detection chip can effectively detect the position touched and read by the hand of the blind, so that only the touch and read point display array 103 of the blind needs to be refreshed in a targeted manner, and the refreshing of the point display array 103 can be completed only by using one set of power source.
In order to further explain the component multiplexing method, the numbers of the positions of the electromagnet 116, the dot display array 103, the through hole 102, the mechanical component multiplexing scheme, and the component multiplexing software algorithm will be described in three segments with reference to the drawings.
Mechanical assembly multiplexing scheme. The electromagnet 116 in combination with the spring 112 completes the positional return of the braille dots, as shown in fig. 1 and described above. When the Braille is set, the electromagnet 116 pulls the steel wire 114 to enable the round-head thimble 110 to move downwards so as to enable Braille points to be sunken; when the Braille is reset, the resilience force of the spring 112 can push the round-head thimble 110 upwards, so that the Braille point position is raised. As shown by the through hole position numbers marked in fig. 3 and fig. 5, the electromagnet 1161 drives the eight round-head pins 110 located at the through hole position 1021 in the pointing array 1031 to 1038 to perform the position resetting simultaneously under the above-mentioned position resetting principle. The electromagnet 1162 drives the pointing array 1031 to the eight round-head pins 110 located at the through-hole 1022 in the pointing array 1038 to perform position resetting simultaneously according to the above position resetting principle. The electromagnets 1163 to 1166 drive the eight round-head pins 110 located in the through-hole positions 1023 to 1026 to reset simultaneously. Therefore, the reuse of the components of the power source can be realized, and the use efficiency of the power source is improved. The specific correspondence is detailed in table 1.
Table 1. Table of the positions of the round-nose pins 110:
| array with driving electromagnet thimble | Electromagnet 1161 | Electromagnet 1162 | Electromagnet 1163 | Electromagnet 1164 | Electromagnet 1165 | Electromagnet 1166 |
| Dot display array 1031 | Through hole location 1021 | Through hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot display array 1032 | Through hole location 1021 | Through hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot-display array 1033 | Through hole position 1021 | Through-hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot display array 1034 | Through hole location 1021 | Through hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot display array 1035 | Through hole siteDevice 1021 | Through hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot matrix 1036 | Through hole position 1021 | Through hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot display array 1037 | Through hole location 1021 | Through-hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
| Dot-display array 1038 | Through hole position 1021 | Through-hole location 1022 | Through-hole location 1023 | Through hole location 1024 | Through hole position 1025 | Via location 1026 |
A component multiplexing algorithm. As shown in fig. 7, the specific implementation steps of the algorithm are as follows:
firstly, the ARM processor converts the text into braille codes and stores the braille codes into a cache region.
And secondly, extracting the first 8 braille codes from the buffer area and respectively storing the braille codes into 8 variables from No. 1 to No. 8.
Third, the processor performs a polling check on the 8 dot display arrays 103 of the device to determine if they are being touched.
Fourthly, if the X point display array 103 is detected to be touched and read by fingers, the processor extracts information from the X variable, and the 8 point display arrays 103 of the device can display the X braille codes together (because the blind can only touch and read one point display array 103 at a time, the braille needing to be touched and read only needs to be displayed correctly at the read X position, and the braille information at other positions can be refreshed and displayed according to the position information after the touch and read position is changed). If the touch reading is not carried out, no operation is carried out, and the step five is entered.
Fifthly, detecting whether the 8 Braille codes are touched and read, and returning to the second step if the 8 Braille codes are touched and read; and if the touch reading is not finished, returning to the third step.
Claims (1)
1. The method is applied to the traction type Braille point display device and is characterized in that the traction type Braille point display device comprises a point display array (103) which is arranged in eight lines from top to bottom, a surface material layer (101), a capacity value detection layer (104), a magnetic layer (105), a guide layer (111), a fixed layer (113), a steel wire (114), a push-pull type electromagnet (116), a capacity value detection circuit and a core processor, wherein 6X8 through holes are formed in the surface material layer (101), the capacity value detection layer (104), the magnetic layer (105), the guide layer (111) and the fixed layer (113); a dot display array (103) is composed of three rows and two columns of six Braille points, each Braille point including: the thimble structure comprises a round head thimble (110), a spring (112) and a steel wire (114); the round-head thimble (110) consists of a thimble column (109), a round head (106), a connecting sheet (107) and a connecting groove (108), the round-head thimble (110) is fixedly inserted in the connecting sheet (107) along the axis direction, so that the round head (106), the connecting sheet (107) and the thimble column (109) are a fixed whole, four connecting grooves (108) are circumferentially arranged on the connecting sheet (107) at intervals, the diameter of the connecting sheet (107) is 2.4mm, the diameter of the round head (106) is 2mm, and the diameter of the thimble column (109) is 1mm; the round head (106) and the thimble column (109) of the round-head thimble (110) are made of plastic materials, and the connecting sheet (107) is made of iron materials and can be adsorbed on the magnetic layer (105); the round-head thimble penetrates through the surface material layer (101), the volume value detection layer (104), the magnetic layer (105) and the guide layer (111) from top to bottom; the top end of the spring (112) is wound on the connecting groove (108) of the connecting piece (107), and the bottom end of the spring is vertically welded on the upper surface of the fixed layer (113); the steel wire (114) is a 304 steel wire with the diameter of 0.4mm, one end of the steel wire is wound on the round-head thimble (110) through the connecting groove (108), and the other end of the steel wire is wound on the winding post (115); the method is a power source component multiplexing method based on a capacity value detection technology, and consists of a mechanical component multiplexing scheme and a software multiplexing algorithm; the multiplexing software algorithm can store the Braille codes in variables numbered from 1 to 8 respectively according to sequence after a core processing program detects the position information of the touch and read point display array (103) by the blind person, and the Braille codes stored in the corresponding variables are displayed on all the point display arrays (103) according to the touch and read positions of fingers; the mechanical assembly multiplexing scheme uses six push-pull electromagnets (116) to complete the control of forty-eight Braille points corresponding to the eight-square point display array (103).
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| CN101339706A (en) * | 2007-07-04 | 2009-01-07 | 奥普泰雷克发展有限公司 | Electromechanical relief display |
| CN105679149A (en) * | 2016-03-11 | 2016-06-15 | 浙江理工大学 | Integrated circuit for driving electromagnetic type Braille display device to display Braille character |
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| US6734785B2 (en) * | 2000-10-27 | 2004-05-11 | Robert C. Petersen | Tactile display system |
| JP3994857B2 (en) * | 2002-11-08 | 2007-10-24 | 株式会社デンソー | Irregularity forming device and irregularity display device |
| JP4456434B2 (en) * | 2004-08-03 | 2010-04-28 | 日本放送協会 | Tactile display |
| CN101907922B (en) * | 2009-06-04 | 2015-02-04 | 新励科技(深圳)有限公司 | Touch and touch control system |
| CN101840647A (en) * | 2010-03-26 | 2010-09-22 | 四川大学锦江学院 | Method and device for displaying brailles by deformation of magnetic control silica gel |
| CN102184662A (en) * | 2011-05-23 | 2011-09-14 | 桂林理工大学 | Electromagnetic push-pull Braille touch screen |
| US20130016042A1 (en) * | 2011-07-12 | 2013-01-17 | Ville Makinen | Haptic device with touch gesture interface |
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| CN203894998U (en) * | 2014-06-03 | 2014-10-22 | 李声龙 | Contact motion shifter, braille alphabet unit and braille point display |
| CN106201075B (en) * | 2016-06-30 | 2019-06-25 | 京东方科技集团股份有限公司 | Touch panel and its driving method, touch control display apparatus |
| CN206931264U (en) * | 2017-01-18 | 2018-01-26 | 四川大学 | Dragging type braille point shows device |
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| CN101339706A (en) * | 2007-07-04 | 2009-01-07 | 奥普泰雷克发展有限公司 | Electromechanical relief display |
| CN105679149A (en) * | 2016-03-11 | 2016-06-15 | 浙江理工大学 | Integrated circuit for driving electromagnetic type Braille display device to display Braille character |
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