CN103777823B - Real six-point infrared touch equipment and circuit thereof - Google Patents
Real six-point infrared touch equipment and circuit thereof Download PDFInfo
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- CN103777823B CN103777823B CN201410038779.6A CN201410038779A CN103777823B CN 103777823 B CN103777823 B CN 103777823B CN 201410038779 A CN201410038779 A CN 201410038779A CN 103777823 B CN103777823 B CN 103777823B
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Abstract
The invention discloses real six-point infrared touch equipment and a circuit thereof. A plurality of controllers are mounted and used on a circuit board, and the working efficiency of a touch system is improved; in addition, the controllers, an infrared transmitting circuit, an infrared receiving circuit, an infrared receiving tube and an infrared transmitting tube are respectively located on different substrates; the substrates are connected by connectors. The circuit board is convenient to assemble, and is applicable to infrared touch screens of any size; the corresponding touch equipment is mutually matched with the size of an infrared screen, the manufacturing is easy, and the maintenance is convenient. The infrared touch equipment is convenient to assemble and low in maintenance cost, and different sizes are flexibly defined; the touch equipment of all sizes is more flexibly collocated, and the touch equipment can be more widely applied by using an infrared real six-point multipoint technology.
Description
Technical field
The present invention relates to a kind of true 6 infrared touch control devices, be specifically related to a kind of infrared multi-touch device and circuit thereof.
Background technology
Traditional multiple point touching technology based on touch-screen roughly can be divided into 2 kinds according to the principle of touch-screen: capacitance plate technology and touch screens technology.Both get up to realize the technology that contact identifies by touch screen controller and corresponding sensor combinations.Resistive touch screen is commonly called as " soft screen " is made up of 2 layers of transparent resistive material with identical table and resistance. be under pressure when touch-screen table enough people time just can make inner 2 layers of conductive layer conducting thus analyze the coordinate of contact.This touch screen technology can work under comparatively rugged environment, but can only be used for single-point touch and sensitivity is not high.And capacitive touch screen is commonly called as " firmly shielding ".It is particulate metal conductive materials sticking layer of transparent at glass surface.When the finger touch of people is to touch-screen.Just form coupling capacitance with internal face surface and siphon away alternating current. thus the electric capacity of electric shock is changed.The frequency of corresponding oscillator is also changed.Touch location is determined in change finally by survey frequency.This method susceptibility is high, and response is very fast and can support the touch-control of multiple spot.But because capacitance plate can only bio-electricity induction. so must touching be pointed, wear gloves or just cannot correctly identify with pen.
In research and practice process, the present inventor finds that infrared touch panel is more suitable for large-sized multiple point touching, and proposes the circuit of a kind of infrared touch device and infrared touch device on this basis.
Summary of the invention
The invention provides a kind of true 6 infrared touch control devices, corresponding touch control device mates mutually with the size of infrared screen, easily manufactures, is convenient to safeguard.
A kind of true 6 infrared touch control devices, is characterized in that, comprising:
First control module;
Second control module;
Infrared transmitting tube and infrared transmitting circuit, infrared transmitting circuit is the auxiliary circuit coordinating infrared signal to launch;
Infrared receiving tube and infrared receiving circuit, infrared receiving circuit is the auxiliary circuit coordinating IR signal reception;
Wherein, the second control module controls infrared emission tube and launches, and controls infrared receiver tube and receives infrared signal;
The infrared signal that infrared receiver tube receives converts digital signal to through A/D after amplifier amplifies;
First control module and the second control module are electrically connected;
First control module analyzes described digital signal, determines the coordinate position of touch-control.
And a kind of true 6 infrared touch-control circuits, is characterized in that, comprising:
First control module;
Second control module;
Infrared transmitting tube and infrared transmitting circuit, infrared transmitting circuit is the auxiliary circuit coordinating infrared signal to launch;
Infrared receiving tube and infrared receiving circuit, infrared receiving circuit is the auxiliary circuit coordinating IR signal reception;
Wherein, the second control module controls infrared emission tube and launches, and controls infrared receiver tube and receives infrared signal;
The infrared signal that infrared receiver tube receives converts digital signal to through A/D after amplifier amplifies;
First control module and the second control module are electrically connected;
First control module analyzes described digital signal, determines the coordinate position of touch-control.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is infrared touch control device structural drawing of the present invention;
Fig. 2 is the first control module pinouts of the present invention;
Fig. 3 is the second control module pinouts of the present invention;
Fig. 4 is infrared transmitting circuit circuit diagram of the present invention;
Fig. 5 is infrared receiving circuit circuit diagram of the present invention;
Fig. 6 is infrared signal amplification circuit diagram of the present invention.
embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of true 6 infrared touch control devices, can realize Multi-point infrared touch-control simply and easily, be described in detail respectively below.
The principle of work of infrared touch panel is covered with infrared receiving tube and infrared transmitting tube in the surrounding of touch-screen, these infrared tubes in touch screen surface in Rankine-Hugoniot relations one to one, form a light net become by infrared ray cloth, when have object (finger, band gloves or any touching object) enter infrared light net stop the infrared ray transmitter and receiver in somewhere time, the ultrared power that this receiving tube putting both direction anyhow receives will change, by the change understanding ultrared reception condition, equipment just can know that where touches.Due to the principle of work of infrared touch panel itself, can accomplish during use to touch work without pressure (referring to touch body to the applied pressure of touch-screen own), therefore touch-screen can be accomplished without glass work.Infrared touch panel, by hardware design and software programming, can carry out interpolation calculation to each point data, can reach higher resolution.In a flash same when infrared touch panel works, a pair infrared tube (referring to that the corresponding power valve and of physical location receives only pipe) is only had to carry out datamation, circuit is by reaching the effect of reaction rapidly to the high-frequency data acquisition of infrared tube, therefore the reaction velocity of touch-screen quickly.
Multi-point touch, also multiple point touching is claimed, English is translated into MultiTouch or Multi-Touch, is to adopt human-computer interaction technology to be combined the common technology realized with hardware device, be one by many people multiple spot simultaneously by realizing the input technology of image applications control between Touch Screen and computing machine.When there is no conventional input device (as mouse, keyboard etc.), interactive operation between people and computing machine can be carried out.
As Fig. 1, the application adopts double control unit, comprising: the first control module, the second control module, infrared transmitting tube and infrared transmitting circuit, and infrared transmitting circuit is the auxiliary circuit coordinating infrared signal to launch; Infrared receiving tube and infrared receiving circuit, infrared receiving circuit is the auxiliary circuit coordinating IR signal reception; Wherein, the second control module controls infrared emission tube and launches, and controls infrared receiver tube and receives infrared signal; The infrared signal that infrared receiver tube receives converts digital signal to through A/D after amplifier amplifies; First control module and the second control module are electrically connected; First control module analyzes described digital signal, determines the coordinate position of touch-control.First control module controls A/D converter and carries out A/D conversion to the signal that infrared receiving tube receives.Adopt the pattern of this double control unit can improve the work efficiency of infrared touch screen, improve system to the reaction velocity of multiple spot identification, realize true multi-point identification.
Described infrared transmitting circuit comprises displacement latch and demultplexer; Described infrared receiver comprises displacement latch, MUX, amplifier.
The circuit board of infrared touch device disclosed by the invention is provided with and above-mentionedly mentions all components and parts, and the connection of necessity that those skilled in the art can imagine.First control module, the second control module, infrared transmitting circuit, infrared receiving circuit, infrared receiving tube, infrared transmitting tube lay respectively on different substrates, are connected between different substrate by connector.Infrared screen is made up of the substrate being provided with the first control module.The size different according to infrared screen selects other substrate of varying number to connect.When the size of infrared screen increases, the quantity of infrared transmitting circuit, infrared receiving circuit, infrared receiving tube, infrared transmitting tube substrate correspondingly can be increased; Be connected with data flat cable between substrate with substrate.
Further, the quantity of the second control module substrate can be increased, to control above-mentioned infrared transmitting circuit, infrared receiving circuit, infrared receiving tube, infrared transmitting tube.
As Fig. 2,3, in the present embodiment, the first control module is that STM32F103, ARM company is in order to cater to the demand in market.In 2008, the ARM-Cortex-M3 kernel of specialized designs high-performance, lowest version, low-power consumption.When promoting this kernel framework, STM32 series is shown one's talent, and becomes the leader in this market rapidly.Wherein, STM32F103 " enhancement mode " series: its main working clock frequency is at 72MHz, it is the product of 32, compare in basic model, frequency of operation is faster, and compared with original ARM7, except indivedual model, outside operationally slightly inferior on clock, this series is from far away more than model most of in ARM7 series; And abundant Peripheral Interface, more than ARM7 is many, and according to the application of Practical Project, can have the selection not of the same race of 32K to 128K internal memory, so this series be called as the highest series of cost performance, be in STM32 series entry level first-selection study chip type.Second control module is STM8F103,8 single-chip microcomputers.
Wherein, STM32F103 can start in the following way:
1.ISP pattern.This pattern is exactly just perform after STM32 resets to be solidificated in inner BOOT LOADER program (solidification, we cannot read and write), then waits for serial data, thus realizes serial ports bootloader function.This pattern can not start from user storage area (starting from 0X08000000 unless controlled it with serial ports), so after have updated code, need to be set to other patterns ((FLASH pattern). require BOOTl=0, BOOTO=1;
2. FLASH start-up mode.This pattern directly starts from 0X08000000, namely our Starting mode of code of oneself writing.Only reason condition all with this, should require BOOTl=X, BOOTO=0;
3.SRAM start-up mode.Start from 0X20000000, that is before SRAM pattern starts, guarantee that in SRAM, oneself is through there being code, otherwise be exactly crash. require BOOTl=1, BOOTO=l;
As Fig. 4, for infrared light emission circuit, because the infrared diode on infrared touch panel is simultaneously luminous, can mutually disturb, so the main practical function of infrared transmitting circuit allows infrared diode luminous successively exactly, consider the electric current of infrared diode luminescence on this basis, the data parameters such as voltage, choose corresponding chip to realize.As requested, can choose chip 74HC164,74HC138 and triode come together to realize its function.Allow triode operation in amplification region, infraluminescence pipe group is received the e pole of corresponding triode, input a high level in base stage, because the pressure drop of base stage and emitter is little, so also corresponding high level can be obtained at emitter.As long as the negative pole changing luminotron in this case just can realize lighting of infraluminescence pipe.
As Fig. 5, infrared receiving tube is semiconductor devices infrared signal being transformed into electric signal, its main core is a special PN knot, and the photoelectron received can be converted into electronics by this PN, and its main theoretical foundation is the photoelectric effect in semiconductor physics.Certainly, under the condition not having photoelectron/illumination, also there is the very faint dark current of a part; In time having illumination, due under photoelectric exciting, electric current has now had significant change, and electric current is at this time photocurrent.Infrared receiving tube is generally formation a pair for infrared transmitting tube, and such benefit is the light frequency point of work, relatively, can reach maximum reception.For infrared receiving circuit, require that namely it must require that sequential is completely the same, almost identical with radiating circuit realization mechanism for its implementation of this partial circuit synchronously down with infrared transmitting circuit.But the fundamental purpose of this part is the electric signal obtaining simulation light letter being write conversion.Because photodiode is that light signal is converted to current signal, because the process of current signal is very inconvenient, in this circuit arrangement, by a resistance, light signal is converted to voltage signal, thus makes it be convenient to process.Due to herein, also receiving tube grouping is realized receiving, so when realizing receiving, the function specifically selecting certain receiving tube also must be realized; In addition, selected chip also will possess the ability simulating signal detected being sent to subordinate's process.The application adopts 74HC4066,74HC138 and triode to realize the function of infrared receiver.
As Fig. 6, be simulating signal for the infrared signal received, first carry out amplification process, then carry out A/D and change into digital signal.The amplifying circuit of modelled signal mainly due to from infrared receiving circuit signal too faint, the amplitude of signal is generally at about 50mV, but the sampling resolution of ADC and operating voltage relative to this amplitude voltage be much larger, and owing to there being the existence of dark current in infrared receiving tube, cause signal when reception, having near null value has considerable noise to exist, and has just increased the weight of the difficulty of the extraction of useful signal.The application adopts TS272 as operational amplifier, amplifies small-signal.
The selection of said chip is not unique, it will be recognized by those skilled in the art that all other chips that can realize corresponding chip functions, can both be used for replacing the chip shown in above-described embodiment.
STM32F103 carries 12,2 tunnel ADC, receives the signal after amplifying, and judges touch-control coordinate according to signal.The control module of the application is not limited to STM32F103, when using other control chip, can realize ADC function by adopting special ADC chip.
Or, when carrying 12,2 tunnel ADC and cannot satisfying the demands, also ADC input can be increased by the mode expanding ADC.As by increasing ADC chip, and the digital signal after conversion being input to the I/O port of STM32F103.
STM32F103 is self-carried USB function also, can be communicated, on a display screen displaing coordinate position by this port with computer equipment.The control module of the application is not limited to STM32F103, when using other control chip, can realize USB function by the method expanding USB port.Also other port can be passed through, as I/O port, the mode output coordinate position of I2C port translation.
Based on foregoing circuit structure, the application can realize true six point locations, and owing to adopting dual controller, can process infrared signal fast, improves the work efficiency of system.
The application further provides a kind of non-homogeneous infrared ray location mode, and infrared ray is in the center section dense distribution of infrared screen, and opposite intermediate portions relative loose around, although this method adds the complexity of algorithm.But because center section is the region used frequently, the infrared ray distribution improving center section can improve the performance of whole infrared screen.
Circuit described in the application is measured protocol development, is all exempt to install the equipment driven at different operating system.TUIO agreement is a framework and agreement of increasing income, it defines a general agreement and API for multi-point touch, by this agreement, not only can describe the touch-control event that multi-point touch screen occurs, the information of the object describing contact touch screen surface can also be allowed.The touch information captured is done view coding according to TUI01 by the bottom object identification of system and trace routine, sends to the client needing arbitrarily this touch information.Now, increasing man-machine interaction application program is all followed TUI01 and is done view.Application program based on TUIO agreement is divided into two kinds, and one is serve end program (Trakcer Application.Another kind is client application (TUIO Client) Trakcer Application is the contact information that a kind of bottom can identify multi-point touch screen, and can follow the tracks of these contacts.TUIO Client is the program of a class presentation layer, and it obtains the data of TUIO form from port by TCP, resolve to the message of multi-point touch, show with the form of human-computer interaction.
In addition, described infrared screen is located based on the technology of infrared 6 touch points, multipoint data process, multiple spot fault-tolerant technique.Infrared screen has fault tolerance, when launching substrate front and having barrier to block.Other regions of infrared screen still can normally work, and have not been subject to barrier substrate contribution.After barrier is removed, infrared screen rescans location, and whole infrared screen recovers normal work.
It should be noted that, the content such as information interaction, implementation between said apparatus and intrasystem each unit, due to the inventive method embodiment based on same design, particular content can see in the inventive method embodiment describe, repeat no more herein.
The infrared multi-touch device of the one above embodiment of the present invention provided and circuit thereof, be described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (2)
1. true 6 infrared touch control devices, is characterized in that, comprising:
First control module;
Second control module;
Infrared transmitting tube and infrared transmitting circuit, infrared transmitting circuit is the auxiliary circuit coordinating infrared signal to launch;
Infrared receiving tube and infrared receiving circuit, infrared receiving circuit is the auxiliary circuit coordinating IR signal reception;
Wherein, the second control module controls infrared emission tube and launches, and controls infrared receiver tube and receives infrared signal;
The infrared signal that infrared receiver tube receives converts digital signal to through A/D after amplifier amplifies;
First control module and the second control module are electrically connected;
First control module analyzes described digital signal, determines the coordinate position of touch-control; Described first control module can adopt ISP, FLASH start-up mode, SRAM pattern starts; A/D change-over circuit is built in the first control module, or for being controlled by the first control module independent of the first control module is outer; First control module is with computer equipment or be directly connected with display device, displaing coordinate position; First control module, the second control module, infrared transmitting circuit, infrared receiving circuit, infrared receiving tube, infrared transmitting tube lay respectively on different substrates, connected by connector between different substrate, described first control module, the second control module, by USB interface with computer equipment or be directly connected with display device, infrared screen is made up of the substrate being provided with the first control module, described infrared screen selects the substrate of varying number to connect according to different sizes, is connected between substrate with substrate with data flat cable; Described infrared screen is measured protocol development, is all exempt to install the equipment driven at different operating system; Described infrared screen is located based on the technology of infrared 6 touch points, and multipoint data process, multiple spot are fault-tolerant; Described infrared screen has fault tolerance, and when launching substrate front and having barrier to block, other regions of infrared screen still can normally work, be not subject to barrier substrate contribution, after barrier is removed, infrared screen rescans location, and whole infrared screen recovers normal work.
2. true 6 infrared touch-control circuits, is characterized in that, comprising:
First control module;
Second control module;
Infrared transmitting tube and infrared transmitting circuit, infrared transmitting circuit is the auxiliary circuit coordinating infrared signal to launch;
Infrared receiving tube and infrared receiving circuit, infrared receiving circuit is the auxiliary circuit coordinating IR signal reception;
Wherein, the second control module controls infrared emission tube and launches, and controls infrared receiver tube and receives infrared signal;
The infrared signal that infrared receiver tube receives converts digital signal to through A/D after amplifier amplifies;
First control module and the second control module are electrically connected;
First control module analyzes described digital signal, determines the coordinate position of touch-control; Described first control module can adopt ISP, FLASH start-up mode, SRAM pattern starts; A/D change-over circuit is built in the first control module, or for being controlled by the first control module independent of the first control module is outer; First control module is with computer equipment or be directly connected with display device, displaing coordinate position; First control module, the second control module, by USB interface with computer equipment or be directly connected with display device; First control module, the second control module, infrared transmitting circuit, infrared receiving circuit, infrared receiving tube, infrared transmitting tube lay respectively on different substrates, are connected between different substrate by connector; Infrared screen is made up of the substrate being provided with the first control module, and described infrared screen selects the substrate of varying number to connect according to different sizes, is connected between substrate with substrate with data flat cable; Described infrared screen is measured protocol development, is all exempt to install the equipment driven at different operating system; Described infrared screen is located based on the technology of infrared 6 touch points, and multipoint data process, multiple spot are fault-tolerant; Described infrared screen has fault tolerance, and when launching substrate front and having barrier to block, other regions of infrared screen still can normally work, be not subject to barrier substrate contribution, after barrier is removed, infrared screen rescans location, and whole infrared screen recovers normal work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410038779.6A CN103777823B (en) | 2014-01-27 | 2014-01-27 | Real six-point infrared touch equipment and circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410038779.6A CN103777823B (en) | 2014-01-27 | 2014-01-27 | Real six-point infrared touch equipment and circuit thereof |
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| CN103777823A CN103777823A (en) | 2014-05-07 |
| CN103777823B true CN103777823B (en) | 2015-02-18 |
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| CN105320368A (en) * | 2015-11-24 | 2016-02-10 | 安徽瑞沃电子科技有限公司 | Infrared multipoint touch screen system running in multiple modes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819488A (en) * | 2009-02-27 | 2010-09-01 | 北京汇冠新技术股份有限公司 | Circuit board for infrared touch screen and infrared touch screen |
| CN101876864A (en) * | 2009-12-15 | 2010-11-03 | 北京中星微电子有限公司 | Data acquisition device and method of touch screen as well as touch screen system |
| US8558818B1 (en) * | 2009-04-21 | 2013-10-15 | Hon Hai Precision Industry Co., Ltd. | Optical touch system with display screen |
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2014
- 2014-01-27 CN CN201410038779.6A patent/CN103777823B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819488A (en) * | 2009-02-27 | 2010-09-01 | 北京汇冠新技术股份有限公司 | Circuit board for infrared touch screen and infrared touch screen |
| US8558818B1 (en) * | 2009-04-21 | 2013-10-15 | Hon Hai Precision Industry Co., Ltd. | Optical touch system with display screen |
| CN101876864A (en) * | 2009-12-15 | 2010-11-03 | 北京中星微电子有限公司 | Data acquisition device and method of touch screen as well as touch screen system |
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