CN105786222A - Ultrasonic sensing writing method and system, intelligent terminal and writing end - Google Patents

Ultrasonic sensing writing method and system, intelligent terminal and writing end Download PDF

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Publication number
CN105786222A
CN105786222A CN201511000607.0A CN201511000607A CN105786222A CN 105786222 A CN105786222 A CN 105786222A CN 201511000607 A CN201511000607 A CN 201511000607A CN 105786222 A CN105786222 A CN 105786222A
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China
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infrared signal
writing end
intelligent terminal
emitter
interval time
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朱向军
李飞行
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Guangdong Genius Technology Co Ltd
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Guangdong Genius Technology Co Ltd
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Priority to CN201511000607.0A priority Critical patent/CN105786222A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03542—Light pens for emitting or receiving light

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

The invention discloses an ultrasonic sensing writing method and an ultrasonic sensing writing system, an intelligent terminal and a writing end. The system comprises the intelligent terminal and the writing end; the intelligent terminal comprises a first receiving module, a second receiving module, and a first acquisition module; and the writing end comprises a first transmitting module and a second transmitting module. According to the method and system, through using the dual-transmitter system of the intelligent terminal, cooperating with the sensing ultrasonic writing end, and synchronizing by infrared light, handwriting detection is achieved, real writing can be achieved on the outer side of the intelligent terminal, the original handwriting recognition by ultrasonic sensing is achieved, and the writing end only needs certain power when transmitting infrared data, thus the service life of the writing end can be greatly increased.

Description

Ultrasonic sensing Writing method and system, intelligent terminal and writing end
Technical field
The present invention relates to intelligent terminal and write field, particularly relate to ultrasonic sensing Writing method and system, intelligent terminal and writing end.
Background technology
In order to realize writing needing have attachable lettering pen on flat board, this connected mode is commonly wired or bluetooth at present, and the mode that its sensing is write is generally electromagnetic induction or capacitive sensing, possesses packed battery or passive sensing.And do not have can the writing system that carry out former person's handwriting detection outside screen of simple and easy use.
Summary of the invention
The invention provides ultrasonic sensing Writing method and system, intelligent terminal and writing end, the present invention well detects the position of writing end outside screen.
For realizing above-mentioned design, the present invention by the following technical solutions:
First aspect, have employed a kind of method that ultrasonic sensing is write, including:
The first infrared signal that intelligent terminal for reception sends to writing end, sends the first ultrasonic pulse signal by the first emitter to described writing end；
Writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；
Intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；
Writing end receives described second ultrasonic pulse signal, calculates the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal；
Intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Wherein, described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also includes:
Writing end detects writes pressure, sends to described intelligent terminal and carries the 4th infrared signal writing pressure information；
Described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also includes:
Intelligent terminal is according to the position of described writing end and described writes pressure information, obtains handwriting trace.
Wherein, described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
Wherein, described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also includes:
Writing end obtains and writes the digital quantity that pressure is corresponding, sends the 5th infrared signal writing digital quantity corresponding to pressure described in carrying to described intelligent terminal；
Described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also includes:
Intelligent terminal, according to the position of described writing end and described digital quantity, obtains written handwriting.
Wherein, described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
Wherein, described intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, and the computing formula of the position obtaining writing end is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time；
In the common point of two circles that equation represents x > 0 (x, y) for coordinate points.
Wherein, the acoustic signals that first speaker of described first ultrasonic pulse signal and the second ultrasonic pulse signal respectively intelligent terminal side and the second speaker send respectively mix with original audio signal composition ultrasonic signal, signal frequency is 22KHz.
Wherein, the infrared receiver sensor that described first infrared signal, the second infrared signal and the 3rd infrared signal are installed by intelligent terminal side receives.
Second aspect, have employed a kind of method that intelligent terminal's ultrasonic sensing is write, including:
Receive the first infrared signal that writing end sends, send the first ultrasonic pulse signal by the first emitter to described writing end；
Receive the second infrared signal sent after writing end receives the first ultrasonic pulse signal, send the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal；
Receiving the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal；
According to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end.
Wherein, described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also include:
Receive the 4th infrared signal writing pressure information carrying writing end detection that writing end sends；
Described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also include:
Position according to described writing end and described write pressure information, obtains handwriting trace.
Wherein, described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
Wherein, described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also include:
Receive the 5th infrared signal writing digital quantity corresponding to pressure carrying writing end acquisition that writing end sends；
Described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also include:
Position according to described writing end and described digital quantity, obtain written handwriting.
Wherein, described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
The invention have the benefit that the present invention passes through the first infrared signal that intelligent terminal for reception sends to writing end, send the first ultrasonic pulse signal by the first emitter to described writing end；Writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；Intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；Writing end receives described second ultrasonic pulse signal, calculates the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal；Intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.The present invention utilizes double; two ejector systems of intelligent terminal, coordinate the writing end of sensing sound wave, use infrared light synchronizes, realize person's handwriting detection, can realize truly writing outside intelligent terminal, realize the former person's handwriting identification of ultrasonic sensing, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end greatly.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during the embodiment of the present invention is described is briefly described, 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 premise not paying creative work, it is also possible to content according to embodiments of the present invention and these accompanying drawings obtain other accompanying drawing.
Fig. 1 is the method flow diagram of the first embodiment of the method that a kind of ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 2 is the method flow diagram of the second embodiment of the method that a kind of ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 3 is the method flow diagram of the 3rd embodiment of the method that a kind of ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 4 is the method flow diagram of the first embodiment of the method that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 5 is the method flow diagram of the second embodiment of the method that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 6 is the method flow diagram of the 3rd embodiment of the method that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 7 is the method flow diagram of the first embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 8 is the method flow diagram of the second embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Fig. 9 is the method flow diagram of the 3rd embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Figure 10 is the block diagram of the first embodiment of the system that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Figure 11 is the block diagram of the second embodiment of the system that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Figure 12 is the block diagram of the 3rd embodiment of the system that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Figure 13 is the block diagram of the first embodiment of a kind of intelligent terminal provided in the specific embodiment of the invention.
Figure 14 is the block diagram of second embodiment of a kind of intelligent terminal provided in the specific embodiment of the invention.
Figure 15 is the block diagram of the 3rd embodiment of a kind of intelligent terminal provided in the specific embodiment of the invention.
Figure 16 is the block diagram of the first embodiment of a kind of writing end provided in the specific embodiment of the invention.
Figure 17 is the block diagram of the second embodiment of a kind of writing end provided in the specific embodiment of the invention.
Figure 18 is the block diagram of the 3rd embodiment of a kind of writing end provided in the specific embodiment of the invention.
Detailed description of the invention
For the technical scheme making to present invention solves the technical problem that, adopting and the technique effect reached clearly, below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is described in further detail, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.
Refer to Fig. 1, it is the method flow diagram of the first embodiment of the method that a kind of ultrasonic sensing of offer is write in the specific embodiment of the invention.As it can be seen, the method, including:
Step S101, the first infrared signal that intelligent terminal for reception sends to writing end, send the first ultrasonic pulse signal by the first emitter to described writing end.
Concrete, intelligent terminal opens infrared receiver sensor, receives the first infrared signal that writing end sends, after receiving infrared signal, sends the first ultrasonic pulse signal by the first emitter to described writing end.Preferably, described intelligent terminal is panel computer, and described infrared receiver sensor is arranged on the side of intelligent terminal.
Step S102, writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Concrete, writing end opens sound pickup sensor, receives the first ultrasonic pulse signal that the first emitter sends；Described first interval time T1 include: the first emitter sends that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Preferably, described writing end is the writing pencil with sound pickup sensor and infrared transmitter.
Step S103, intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end.
Preferably, the acoustic signals that first speaker of described first ultrasonic pulse signal and the second ultrasonic pulse signal respectively intelligent terminal side and the second speaker send respectively mix with original audio signal composition ultrasonic signal, signal frequency is 22KHz.
Concrete, intelligent terminal for reception to writing end send carry first interval time t1The second infrared signal, then pass through the second emitter and send the second ultrasonic pulse signal to writing end；Preferably, first speaker of described first emitter and the second emitter respectively described intelligent terminal and the second speaker.
Step S104, writing end receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal.
Concrete, second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.
Step S105, intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, intelligent terminal often receives one group of t of a writing end transmission1、t2Data, can quickly calculate, in conjunction with the position relationship between described first emitter and the second emitter, the coordinate obtaining writing end position.
In sum, the first infrared signal that the embodiment of the present invention is sent to writing end by intelligent terminal for reception, send the first ultrasonic pulse signal by the first emitter to described writing end；Writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；Intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；Writing end receives described second ultrasonic pulse signal, calculates the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal；Intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.The present invention utilizes the ejector system that intelligent terminal carries, coordinate the pen of sensing sound wave, use infrared light synchronizes, writing end position in writing region outside intelligent terminal can be detected in real time, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end greatly.
Refer to Fig. 2, it is the method flow diagram of the second embodiment of the method that a kind of ultrasonic sensing of offer is write in the specific embodiment of the invention.As it can be seen, the method, including:
Step S201, the first infrared signal that intelligent terminal for reception sends to writing end, send the first ultrasonic pulse signal by the first emitter to described writing end.
Step S202, writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Step S203, intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end.
Step S204, writing end receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal.
Step S205, writing end detects writes pressure, sends to described intelligent terminal and carries the 4th infrared signal writing pressure information.
Wherein, step S205 and step S201-S204 is without inevitable precedence relationship.
In the present embodiment, writing end detects writes pressure, is transmitted to intelligent terminal by carrying the 4th infrared signal writing pressure information, has following several situation:
1. when carrying the 4th infrared signal writing pressure information and being individually transmitted to intelligent terminal, the 4th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or after the 3rd infrared signal, it is transmitted to intelligent terminal.
2. when carrying described 4th infrared signal writing pressure information and including the first infrared signal, the second infrared signal or three infrared signals: the 4th infrared signal is the first infrared signal, described in write pressure information and be transmitted to intelligent terminal by the first infrared signal together with confirmation；Or the 4th infrared signal be the second infrared signal, described in write pressure information and the first interval time was transmitted to intelligent terminal by the second infrared signal together；Or the 4th infrared signal be the 3rd infrared signal, described in write pressure information and the second interval time was transmitted to intelligent terminal by the 3rd infrared signal together；Or the 4th infrared signal be the first infrared signal and the second infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal and the second infrared signal；Or the 4th infrared signal be the second infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the second infrared signal and the 3rd infrared signal；Or the 4th infrared signal be the first infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal and the 3rd infrared signal；Or the 4th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal, the second infrared signal and the 3rd infrared signal.Wherein, when the 4th infrared signal is plural infrared signal, obtain write pressure information carry out XOR with or computing etc..
Concrete, the coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 4th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.In the present embodiment, what writing end detected writes pressure is not 0, then it represents that writing end is write；What writing end detected writes pressure is 0, then it represents that writing end is not write, and writing end is in vacant state.
Step S206, intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, the computing formula of the position coordinates of writing end is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time.
In the present embodiment, in concrete calculating process, and B represents the radius of two circles respectively, asks for two circles and is the position of writing pencil at the intersection point writing in district.Described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.Owing to the time that t2 is infrared transmission belongs to the light velocity, it is very short that t3 is that intelligent terminal processes time of order, t1 is the time of sound transmission, relative to t1, the time of t2 and t3 is very little, differed several number of levelss, calculate time be negligible, directly described interval t1 is considered as first interval time t1；In like manner, described interval t1 ' is considered as second interval time t2。
Step S207, intelligent terminal is according to the position of described writing end and described writes pressure information, obtains handwriting trace.
Concrete, intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end, writing end is obtained on described position either with or without writing further according to writing pressure information, write pressure to be 0 and do not write, write pressure not to be 0 and write, thus obtaining handwriting trace.
In sum, the product of the time of twice ultrasonic transmission Yu the speed of ultrasonic transmission is set up the equation group of two circles by the embodiment of the present invention, the disaggregation of equation group is the coordinate position that writing end is write, it is whether 0 to judge whether this coordinate position is write further according to writing pressure, thus obtaining the handwriting trace of writing end, method is simple, the equipment used is the existing ejector system of intelligent terminal, coordinate the writing end having an infrared receiver sensor, the former person's handwriting identification that the writing end of ultrasonic sensing is write can be realized, and writing end only needs certain power when sending infrared data, the cruising time of writing end can be increased greatly.
Refer to Fig. 3, it is the method flow diagram of the first embodiment of the method that a kind of intelligent terminal's ultrasonic sensing of offer is write in the specific embodiment of the invention.As it can be seen, the method, including:
Fig. 3 is the method flow diagram of the 3rd embodiment of the method that a kind of ultrasonic sensing provided in the specific embodiment of the invention is write.
Step S301, the first infrared signal that intelligent terminal for reception sends to writing end, send the first ultrasonic pulse signal by the first emitter to described writing end.
Step S302, writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Step S303, intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end.
Step S304, writing end receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal.
Step S305, writing end obtains and writes the digital quantity that pressure is corresponding, sends the 5th infrared signal writing digital quantity corresponding to pressure described in carrying to described intelligent terminal.
Wherein, step S205 and step S201-S204 is without inevitable precedence relationship.
In the present embodiment, writing end detects writes pressure, and obtains writing the digital quantity h1 that pressure is corresponding by A/D converter, then the 5th infrared signal carrying digital quantity h1 is transmitted to intelligent terminal, has following several situation:
1. when the 5th infrared signal carrying digital quantity is individually transmitted to intelligent terminal, the 5th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or after the 3rd infrared signal, it is transmitted to intelligent terminal.
2. when described 5th infrared signal carrying digital quantity includes the first infrared signal, the second infrared signal or three infrared signals: the 5th infrared signal is the first infrared signal, and described digital quantity is transmitted to intelligent terminal by the first infrared signal；Or the 5th infrared signal be the second infrared signal, described digital quantity is transmitted to intelligent terminal by the second infrared signal；Or the 5th infrared signal be the 3rd infrared signal, described digital quantity is transmitted to intelligent terminal by the 3rd infrared signal；Or the 5th infrared signal be the first infrared signal and the second infrared signal, described first infrared signal and the second infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the second infrared signal and the 3rd infrared signal, described second infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the first infrared signal and the 3rd infrared signal, described first infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, described first infrared signal, the second infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal.Wherein, when the 5th infrared signal is plural infrared signal, intelligent terminal undertaken the digital quantity received averaging calculating, XOR or with or computing etc..
Concrete, described in write digital quantity corresponding to pressure when being 0, expression writing end is vacant state, it does not have write；Described digital quantity corresponding to pressure of writing when being not 0, represents that writing end is write, and it is more big to write digital quantity corresponding to pressure, represents that the dynamics write is more heavy, writes digital quantity corresponding to pressure more little, represents that the dynamics write is more light.The coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 5th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.
Step S306, intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, the computing formula of the position coordinates of writing end is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, and t1 represented for the first interval time, and t2 represented for the second interval time.
In the present embodiment, in concrete calculating process, and B represents the radius of two circles respectively, asks for two circles and is the position of writing pencil at the intersection point writing in district.Described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.Owing to the time that t2 is infrared transmission belongs to the light velocity, it is very short that t3 is that intelligent terminal processes time of order, t1 is the time of sound transmission, relative to t1, the time of t2 and t3 is very little, differed several number of levelss, calculate time be negligible, directly described interval t1 is considered as first interval time t1；In like manner, described interval t1 ' is considered as second interval time t2。
Step S307, intelligent terminal, according to the position of described writing end and described digital quantity, obtains written handwriting.
Concrete, written handwriting includes handwriting trace and the dynamics write, and described digital quantity is more big, represents that the dynamics write is more heavy, writes digital quantity corresponding to pressure more little, represents that the dynamics write is more light.
In sum, the product of the time of twice ultrasonic transmission Yu the speed of ultrasonic transmission is set up the equation group of two circles by the embodiment of the present invention, the disaggregation of equation group is the coordinate position that writing end is write, further according to writing the value of digital quantity corresponding to pressure to judge whether this coordinate position has the dynamics write and write, thus obtaining the written handwriting of writing pencil；Ultrasound wave is directly superimposed upon in audio signal by the present invention, it is impossible to heard by human ear, nor affects on and normally speaks；Utilize the ejector system that intelligent terminal carries, coordinate the writing end of sensing sound wave, use infrared light to synchronize, it is achieved person's handwriting detects, it is possible to realize truly writing outside intelligent terminal, it is achieved the former person's handwriting identification of ultrasonic sensing.
Refer to Fig. 4, it is the method flow diagram of the first embodiment of a kind of intelligent terminal's ultrasonic sensing Writing method of offer in the specific embodiment of the invention.As it can be seen, the method, including:
Step S401, receives the first infrared signal that writing end sends, sends the first ultrasonic pulse signal by the first emitter to described writing end.
Concrete, intelligent terminal opens infrared receiver sensor, receives the first infrared signal that writing end sends, after receiving infrared signal, sends the first ultrasonic pulse signal by the first emitter to described writing end.Preferably, described intelligent terminal is panel computer.
Step S402, receives the second infrared signal sent after writing end receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
In the present embodiment, intelligent terminal for reception to writing end send carry first interval time t1The second infrared signal, then pass through the second emitter and send the second ultrasonic pulse signal to writing end；Preferably, first speaker of described first emitter and the second emitter respectively described intelligent terminal and the second speaker.
Concrete, described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.
Step S403, receives the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, and described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal.
Concrete, second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.Preferably, described writing end is the writing pencil with sound pickup sensor and infrared transmitter.
Step S404, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, intelligent terminal often receives one group of t of a writing end transmission1、t2Data, can quickly calculate, in conjunction with the position relationship between described first emitter and the second emitter, the coordinate obtaining writing end position.
In sum, the first infrared signal that in the embodiment of the present invention, intelligent terminal for reception sends to writing end, send the first ultrasonic pulse signal by the first emitter to described writing end；Receive the second infrared signal sent after writing end receives the first ultrasonic pulse signal, send the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal；Receiving the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal；According to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end.The present invention utilizes the ejector system that intelligent terminal carries, according to twice temporal information in the infrared signal received, it is possible to writing end position in writing region outside intelligent terminal detected in real time, substantially increases the Experience Degree of user.
Fig. 5 is the method flow diagram of the second embodiment of the method that a kind of intelligent terminal's ultrasonic sensing provided in the specific embodiment of the invention is write.
Step S501, receives the first infrared signal that writing end sends, sends the first ultrasonic pulse signal by the first emitter to described writing end.
Step S502, receives the second infrared signal sent after writing end receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
Step S503, receives the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, and described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal.
Step S504, receives the 4th infrared signal writing pressure information carrying writing end detection that writing end sends.
Wherein, step S504 and step S501-S503 is without inevitable precedence relationship.
Concrete, the coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 4th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.In the present embodiment, what writing end detected writes pressure is not 0, then it represents that writing end is write；What writing end detected writes pressure is 0, then it represents that writing end is not write, and writing end is in vacant state.
In the present embodiment, mobile terminal receives the 4th infrared signal writing pressure information carrying writing end detection that writing end sends, and has following several situation:
1. when the 4th infrared signal that mobile terminal receives is the independent infrared signal writing pressure information carrying writing end detection, the 4th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or receive after the 3rd infrared signal.
2. when carrying described 4th infrared signal writing pressure information and including the first infrared signal, the second infrared signal or three infrared signals: the 4th infrared signal is the first infrared signal, intelligent terminal for reception carry simultaneously described in write the first infrared signal of pressure information and confirmation；Or the 4th infrared signal be the second infrared signal, intelligent terminal for reception carry simultaneously described in write second infrared signal of pressure information and the first interval time；Or the 4th infrared signal be the 3rd infrared signal, intelligent terminal for reception carry simultaneously described in write the 3rd infrared signal of pressure information and the second interval time；Or the 4th infrared signal be the first infrared signal and the second infrared signal, intelligent terminal for reception all carry described in write the first infrared signal and second infrared signal of pressure information；Or the 4th infrared signal be the second infrared signal and the 3rd infrared signal, intelligent terminal for reception carry simultaneously described in write the second infrared signal and the 3rd infrared signal of pressure information；Or the 4th infrared signal be the first infrared signal and the 3rd infrared signal, intelligent terminal for reception carry simultaneously described in write the first infrared signal and the 3rd infrared signal of pressure information；Or the 4th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, intelligent terminal for reception carry simultaneously described in write the first infrared signal of pressure information, the second infrared signal and the 3rd infrared signal.Wherein, when the 4th infrared signal is plural infrared signal, intelligent terminal by receive write pressure information carry out XOR with or computing etc..
Step S505, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, intelligent terminal calculates the formula of the position coordinates of writing end and is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time.
In the present embodiment, in concrete calculating process, and B represents the radius of two circles respectively, asks for two circles and is the position of writing pencil at the intersection point writing in district.Described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.Owing to the time that t2 is infrared transmission belongs to the light velocity, it is very short that t3 is that intelligent terminal processes time of order, t1 is the time of sound transmission, relative to t1, the time of t2 and t3 is very little, differed several number of levelss, calculate time be negligible, directly described interval t1 is considered as first interval time t1；In like manner, described interval t1 ' is considered as second interval time t2。
Step S506, according to the position of described writing end with described write pressure information, obtains handwriting trace.
Concrete, intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end, writing end is obtained on described position either with or without writing further according to writing pressure information, write pressure to be 0 and do not write, write pressure not to be 0 and write, thus obtaining handwriting trace.
In sum, in the embodiment of the present invention, the product of the time of twice ultrasonic transmission Yu the speed of ultrasonic transmission is set up the equation group of two circles by intelligent terminal, the disaggregation of equation group is the coordinate position that writing end is write, it is whether 0 to judge whether this coordinate position is write further according to writing pressure, thus obtaining the handwriting trace of writing end fast and accurately, method is simple.
Refer to Fig. 6, it is the method flow diagram of the 3rd embodiment of the method that a kind of intelligent terminal's ultrasonic sensing of offer is write in the specific embodiment of the invention.As it can be seen, the method, including:
Step S601, receives the first infrared signal that writing end sends, sends the first ultrasonic pulse signal by the first emitter to described writing end.
Step S602, receives the second infrared signal sent after writing end receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
Step S603, receives the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, and described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal.
Step S604, receives the 5th infrared signal writing digital quantity corresponding to pressure carrying writing end acquisition that writing end sends.
Wherein, step S604 and step S601-S603 is without inevitable precedence relationship.
Concrete, intelligent terminal receive described in write digital quantity corresponding to pressure when being 0, expression writing end is vacant state, it does not have write；Described digital quantity corresponding to pressure of writing when being not 0, represents that writing end is write, and it is more big to write digital quantity corresponding to pressure, represents that the dynamics write is more heavy, writes digital quantity corresponding to pressure more little, represents that the dynamics write is more light.
In the present embodiment, the coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 5th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.
In the present embodiment, mobile terminal receive writing end send carry writing end obtain the 5th infrared signal, there is following several situation:
1. the 5th infrared signal that mobile terminal receives is when being the infrared signal that digital quantity corresponding to pressure is write in independent carrying, the 5th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or receive after the 3rd infrared signal.
2. when carrying described 5th infrared signal writing digital quantity corresponding to pressure and including the first infrared signal, the second infrared signal or three infrared signals: the 5th infrared signal is the first infrared signal, and intelligent terminal for reception carries the first infrared signal of described digital quantity and confirmation simultaneously；Or the 5th infrared signal be the second infrared signal, intelligent terminal for reception carries second infrared signal of described digital quantity and the first interval time simultaneously；Or the 5th infrared signal be the 3rd infrared signal, intelligent terminal for reception carries the 3rd infrared signal of described digital quantity and the second interval time simultaneously；Or the 5th infrared signal be the first infrared signal and the second infrared signal, intelligent terminal for reception all carries the first infrared signal and second infrared signal of described digital quantity；Or the 5th infrared signal be the second infrared signal and the 3rd infrared signal, intelligent terminal for reception carries the second infrared signal and the 3rd infrared signal of described digital quantity simultaneously；Or the 5th infrared signal be the first infrared signal and the 3rd infrared signal, intelligent terminal for reception carries the first infrared signal and the 3rd infrared signal of described digital quantity simultaneously；Or the 5th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, intelligent terminal for reception carries the first infrared signal of described digital quantity, the second infrared signal and the 3rd infrared signal simultaneously.Wherein, when the 5th infrared signal is plural infrared signal, intelligent terminal the digital quantity received is carried out XOR with or computing etc..
Step S605, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
Concrete, intelligent terminal calculates the formula of the position coordinates of writing end and is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time.
In the present embodiment, in concrete calculating process, and B represents the radius of two circles respectively, asks for two circles and is the position of writing pencil at the intersection point writing in district.Described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.Owing to the time that t2 is infrared transmission belongs to the light velocity, it is very short that t3 is that intelligent terminal processes time of order, t1 is the time of sound transmission, relative to t1, the time of t2 and t3 is very little, differed several number of levelss, calculate time be negligible, directly described interval t1 is considered as first interval time t1；In like manner, described interval t1 ' is considered as second interval time t2。
Step S606, according to the position of described writing end and described digital quantity, obtains written handwriting.
Concrete, written handwriting includes handwriting trace and the dynamics write, and described digital quantity is more big, represents that the dynamics write is more heavy, writes digital quantity corresponding to pressure more little, represents that the dynamics write is more light.
In sum, the product of the time of twice ultrasonic transmission Yu the speed of ultrasonic transmission is set up the equation group of two circles by intelligent terminal, the disaggregation of equation group is the coordinate position that writing end is write, further according to writing the value of digital quantity corresponding to pressure to judge whether this coordinate position has the dynamics write and write, thus obtaining the written handwriting of writing pencil；Ultrasound wave is directly superimposed upon in audio signal by the present invention, it is impossible to heard by human ear, nor affects on and normally speaks；Utilize the ejector system that intelligent terminal carries, coordinate the writing end of sensing sound wave, use infrared light to synchronize, it is achieved person's handwriting detects, it is possible to realize truly writing outside intelligent terminal, it is achieved the former person's handwriting identification of ultrasonic sensing.
Fig. 7 is the method flow diagram of the first embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Step S701, sends the first infrared signal to intelligent terminal.
Concrete, writing end sends the first infrared signal to intelligent terminal, and described first infrared signal carries the information of writing end, including information about power.
Step S702, the first ultrasonic pulse signal sent by the first emitter after receiving the first infrared signal described in intelligent terminal for reception, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Concrete, writing end opens sound pickup sensor, receive the first ultrasonic pulse signal that the first emitter sends, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；Described first interval time t1Send including: the first emitter that the first ultrasonic pulse signal receives, to writing end, the interval t1 of the first ultrasonic pulse signal that the first emitter sends, writing end is sent the first infrared signal and to infrared signal, infrared signal processed to intelligent terminal for reception to the interval t2 of infrared signal, intelligent terminal for reception and sent the interval t3 of the first ultrasonic pulse signal by the first emitter.Preferably, described writing end is the writing pencil with sound pickup sensor and infrared transmitter.
Step S703, the second ultrasonic pulse signal sent by the second emitter after receiving the second infrared signal described in intelligent terminal for reception, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
Preferably, intelligent terminal is panel computer；First emitter and the second emitter are preferably the speaker of intelligent terminal.
Concrete, second interval time t2Send including: the second emitter that the second ultrasonic pulse signal receives, to writing end, the interval t1 ' of the second ultrasonic pulse signal that the second emitter sends, writing end is sent the second infrared signal and to the second infrared signal, infrared signal processed to intelligent terminal for reception to the second ultrared interval t2 ', intelligent terminal for reception and sent the interval t3 ' of the second ultrasonic pulse signal by the second emitter.
Step S704, the 3rd infrared signal carrying described second interval time is sent to described intelligent terminal, so that described intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end.
Concrete, writing end send to described intelligent terminal carry described second interval time t2The 3rd infrared signal so that one group of t that intelligent terminal sends according to writing end1、t2Data, can quickly calculate, in conjunction with the position relationship between described first emitter and the second emitter, the coordinate obtaining writing end position.
In sum, the embodiment of the present invention is by sending the first infrared signal to intelligent terminal；The first ultrasonic pulse signal sent by the first emitter after receiving the first infrared signal described in intelligent terminal for reception, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；The second ultrasonic pulse signal sent by the second emitter after receiving the second infrared signal described in intelligent terminal for reception, calculates the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal；The 3rd infrared signal carrying described second interval time is sent to described intelligent terminal, so that described intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end.The present invention utilizes the writing end with infrared transmitter and sensing sound wave to obtain ultrasound wave and is transferred to the first emitter and the interval time of the second emitter from writing end, and the time of acquisition is sent to intelligent terminal by infrared signal, so that described intelligent terminal obtains the position of writing end, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end greatly.
Fig. 8 is the method flow diagram of the second embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Step S801, sends the first infrared signal to intelligent terminal.
Step S802, the first ultrasonic pulse signal sent by the first emitter after receiving the first infrared signal described in intelligent terminal for reception, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Step S803, the second ultrasonic pulse signal sent by the second emitter after receiving the second infrared signal described in intelligent terminal for reception, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
Step S804, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal.
Step S805, detects and writes pressure, sends and carries the 4th infrared signal writing pressure information, so that described intelligent terminal according to the position of described writing end and described writes pressure information, obtains handwriting trace.
In the present embodiment, writing end detects writes pressure, is transmitted to intelligent terminal by carrying the 4th infrared signal writing pressure information, has following several situation:
1. when carrying the 4th infrared signal writing pressure information and being individually transmitted to intelligent terminal, the 4th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or after the 3rd infrared signal, it is transmitted to intelligent terminal.
2. when carrying described 4th infrared signal writing pressure information and including the first infrared signal, the second infrared signal or three infrared signals: the 4th infrared signal is the first infrared signal, described in write pressure information and be transmitted to intelligent terminal by the first infrared signal together with confirmation；Or the 4th infrared signal be the second infrared signal, described in write pressure information and the first interval time was transmitted to intelligent terminal by the second infrared signal together；Or the 4th infrared signal be the 3rd infrared signal, described in write pressure information and the second interval time was transmitted to intelligent terminal by the 3rd infrared signal together；Or the 4th infrared signal be the first infrared signal and the second infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal and the second infrared signal；Or the 4th infrared signal be the second infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the second infrared signal and the 3rd infrared signal；Or the 4th infrared signal be the first infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal and the 3rd infrared signal；Or the 4th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, described in write pressure information and be transmitted to intelligent terminal respectively through the first infrared signal, the second infrared signal and the 3rd infrared signal.Wherein, when the 4th infrared signal is plural infrared signal, obtain write pressure information carry out XOR with or computing etc..
Concrete, the coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 4th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.In the present embodiment, what writing end detected writes pressure is not 0, then it represents that writing end is write；What writing end detected writes pressure is 0, then it represents that writing end is not write, and writing end is in vacant state.
In sum, in the embodiment of the present invention, writing end by the time of twice ultrasonic transmission and is write pressure and is sent to intelligent terminal, so that intelligent terminal obtains the coordinate position of writing end, and be whether 0 judge whether this coordinate position is write according to writing pressure, thus obtaining the handwriting trace of writing pencil, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end greatly.
Fig. 9 is the method flow diagram of the 3rd embodiment of the method that a kind of writing end ultrasonic sensing provided in the specific embodiment of the invention is write.
Step S901, sends the first infrared signal to intelligent terminal.
Step S902, the first ultrasonic pulse signal sent by the first emitter after receiving the first infrared signal described in intelligent terminal for reception, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal.
Step S903, the second ultrasonic pulse signal sent by the second emitter after receiving the second infrared signal described in intelligent terminal for reception, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
Step S904, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal.
Step S905, obtains and writes the digital quantity that pressure is corresponding, sends to described intelligent terminal and writes the 5th infrared signal of digital quantity corresponding to pressure described in carrying, so that described intelligent terminal is according to the position of described writing end and described digital quantity, obtains written handwriting.
In the present embodiment, writing end detects writes pressure, and obtains writing the digital quantity h1 that pressure is corresponding by A/D converter, then the 5th infrared signal carrying digital quantity h1 is transmitted to intelligent terminal, has following several situation:
1. when the 5th infrared signal carrying digital quantity is individually transmitted to intelligent terminal, the 5th infrared signal can after the first infrared signal, before the second infrared signal；Or after the second infrared signal, before the 3rd infrared signal；Or after the 3rd infrared signal, it is transmitted to intelligent terminal.
2. when described 5th infrared signal carrying digital quantity includes the first infrared signal, the second infrared signal or three infrared signals: the 5th infrared signal is the first infrared signal, and described digital quantity is transmitted to intelligent terminal by the first infrared signal；Or the 5th infrared signal be the second infrared signal, described digital quantity is transmitted to intelligent terminal by the second infrared signal；Or the 5th infrared signal be the 3rd infrared signal, described digital quantity is transmitted to intelligent terminal by the 3rd infrared signal；Or the 5th infrared signal be the first infrared signal and the second infrared signal, described first infrared signal and the second infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the second infrared signal and the 3rd infrared signal, described second infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the first infrared signal and the 3rd infrared signal, described first infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal；Or the 5th infrared signal be the first infrared signal, the second infrared signal and the 3rd infrared signal, described first infrared signal, the second infrared signal and the 3rd infrared signal are all carried digital quantity and are transmitted to intelligent terminal.Wherein, when the 5th infrared signal is plural infrared signal, intelligent terminal undertaken the digital quantity received averaging calculating, XOR or with or computing etc..
Concrete, described in write digital quantity corresponding to pressure when being 0, expression writing end is vacant state, it does not have write；Described digital quantity corresponding to pressure of writing when being not 0, represents that writing end is write, and it is more big to write digital quantity corresponding to pressure, represents that the dynamics write is more heavy, writes digital quantity corresponding to pressure more little, represents that the dynamics write is more light.The coding figure place of infrared signal is 24, is made up of native code 5bit+ information code 3bit+ numeric data code 12bit+CRC4bit；Wherein, infrared signal includes: the first infrared signal, the second infrared signal, the 3rd infrared signal, the 5th infrared signal.For reducing interference and increasing code check, described infrared signal uses 960nm infrared light and 56KHz modulation, and the width of each is 178us, i.e. 10 modulation pulses, then the data of a frame are 4.272ms；Described ultrasonic pulse signal is directly superimposed upon in audio signal, and hyperacoustic audio frequency, such as 22KHz, it is impossible to heard by human ear, nor affects on and normally speaks；Wherein, ultrasonic pulse signal includes the first ultrasonic pulse signal, the second ultrasonic pulse signal.
In sum, in the embodiment of the present invention, the digital quantity that the time of twice ultrasonic transmission is corresponding with writing pressure is sent to intelligent terminal by writing end, so that intelligent terminal obtains the coordinate position of writing end, and according to the value writing digital quantity corresponding to pressure judges whether there is the dynamics write and write on this coordinate position, thus obtaining the written handwriting of writing pencil, and writing end only needs certain power when sending infrared data, the cruising time of writing end can be increased greatly, improve the Experience Degree of user.
It it is below the embodiment of a kind of ultrasonic sensing writing system of the embodiment of the present invention, the embodiment of a kind of intelligent terminal 110 and the embodiment of a kind of writing end 120, a kind of ultrasonic sensing Writing method of the embodiment of the present invention, a kind of intelligent terminal's ultrasonic sensing Writing method, a kind of writing end ultrasonic sensing Writing method, a kind of ultrasonic sensing writing system, a kind of intelligent terminal 110 and a kind of writing end 120 belong to a total inventive concept, at a kind of ultrasonic sensing writing system, a kind of detail content not described to the greatest extent in the embodiment of intelligent terminal 110 and a kind of writing end 120, refer to above-mentioned a kind of ultrasonic sensing Writing method, a kind of intelligent terminal's ultrasonic sensing Writing method, a kind of embodiment of writing end ultrasonic sensing Writing method.
Refer to Figure 10, it is the block diagram of the first embodiment of a kind of ultrasonic sensing writing system of offer in the specific embodiment of the invention.As it can be seen, this system includes: intelligent terminal 110 and writing end 120.
Described intelligent terminal 110 includes first receiver module the 111, second receiver module 112, first and obtains module 113.
First receiver module 111, intelligent terminal 110 receives the first infrared signal that writing end 120 sends, and sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, intelligent terminal 110 receives described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120.
First obtains module 113, and intelligent terminal 110, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
Described writing end 120 includes the first sending module, the second sending module.
First sending module 121, writing end 120 receives described first ultrasonic pulse signal, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, writing end 120 receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal 110.
In sum, writing end 120 and intelligent terminal 110 cooperate, collaborative work, writing end 120 sends the first interval time and the second interval time, intelligent terminal 110 is according to the position relationship between described first emitter and the second emitter, described first interval time, second interval time, obtain the position of writing end 120, thus the writing end 120 position in writing region outside intelligent terminal 110 being detected in real time, easy to use, user experience is higher, and writing end 120 only needs certain power when sending infrared data, the cruising time of writing end 120 can be increased greatly.
Refer to Figure 11, it is the block diagram of the second embodiment of a kind of ultrasonic sensing writing system of offer in the specific embodiment of the invention.As it can be seen, this system includes: intelligent terminal 110 and writing end 120.
Described intelligent terminal 110 includes first receiver module the 111, second receiver module 112, first and obtains module the 113, second acquisition module 114.
First receiver module 111, intelligent terminal 110 receives the first infrared signal that writing end 120 sends, and sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, intelligent terminal 110 receives described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120.
First obtains module 113, and intelligent terminal 110, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
Concrete, the computing formula of the position of described writing end 120 is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time.
Second obtains module 114, and intelligent terminal 110 is according to the position of described writing end 120 and described writes pressure information, obtains handwriting trace.
Described writing end 120 includes first sending module the 121, second sending module the 122, the 3rd sending module 123.
First sending module 121, writing end 120 receives described first ultrasonic pulse signal, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, writing end 120 receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal 110.
3rd sending module 123, writing end 120 detects writes pressure, sends to described intelligent terminal 110 and carries the 4th infrared signal writing pressure information.
In sum, in the embodiment of the present invention, the 3rd sending module 123, writing end 120 detects writes pressure, sending to described intelligent terminal 110 and carry the 4th infrared signal writing pressure information, described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal；Second obtains module 114, and intelligent terminal 110 is according to the position of described writing end 120 and described writes pressure information, obtains handwriting trace.Interval time that intelligent terminal 110 sends according to writing end 120 and write the position that pressure can determine writing end 120 fast and accurately and the track write, and only use the existing ejector system of intelligent terminal 110, coordinate the writing end 120 having an infrared transmitter and sound pick up equipment, namely the track identification that writing end 120 is write can be realized, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of ultrasonic pen greatly.
Refer to Figure 12, it is the block diagram of the 3rd embodiment of a kind of ultrasonic sensing writing system of offer in the specific embodiment of the invention.As it can be seen, this system, including:
Intelligent terminal 110 and writing end 120.
Described intelligent terminal 110 includes first receiver module the 111, second receiver module 112, first and obtains module the 113, the 3rd acquisition module 115.
First receiver module 111, intelligent terminal 110 receives the first infrared signal that writing end 120 sends, and sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, intelligent terminal 110 receives described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120.
First obtains module 113, and intelligent terminal 110, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
Concrete, the computing formula of the position of described writing end 120 is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 .
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time.
3rd obtains module 115, and intelligent terminal 110, according to the position of described writing end 120 and described digital quantity, obtains written handwriting.
Described writing end 120 includes first sending module the 121, second sending module the 122, the 4th sending module 124.
First sending module 121, writing end 120 receives described first ultrasonic pulse signal, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, writing end 120 receives described second ultrasonic pulse signal, calculate the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal, send the 3rd infrared signal carrying described second interval time to described intelligent terminal 110.
4th sending module 124, writing end 120 obtains and writes the digital quantity that pressure is corresponding, sends the 5th infrared signal writing digital quantity corresponding to pressure described in carrying to described intelligent terminal 110.
In sum, in the embodiment of the present invention, 4th sending module 124, writing end 120 obtains and writes the digital quantity that pressure is corresponding, send the 5th infrared signal writing digital quantity corresponding to pressure described in carrying to described intelligent terminal 110, described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal；3rd obtains module 115, and intelligent terminal 110, according to the position of described writing end 120 and described digital quantity, obtains written handwriting；Position that interval time that intelligent terminal 110 sends according to writing end 120, the digital quantity corresponding with writing pressure can determine writing end 120 fast and accurately and the person's handwriting write, and only use the existing ejector system of intelligent terminal 110, coordinate the writing end 120 having an infrared transmitter and sound pick up equipment, namely the identification of writing end 120 written handwriting can be realized, and writing end only needs certain power when sending infrared data, it is possible to increase the cruising time of ultrasonic pen greatly.
Refer to Figure 13, it is the block diagram of the first embodiment of a kind of intelligent terminal 110 of offer in the specific embodiment of the invention.As it can be seen, this system, including:
First receiver module 111, receives the first infrared signal that writing end 120 sends, sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, receives the second infrared signal sent after writing end 120 receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120；Described second infrared signal carries writing end 120 and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
3rd receiver module 116, receiving the 3rd infrared signal sent after writing end 120 receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end 120 and sends the second infrared signal and the second interval received between the second ultrasonic pulse signal.
First obtains module 113, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
In sum, each module cooperative works, the first receiver module 111, receives the first infrared signal that writing end 120 sends, sends the first ultrasonic pulse signal by the first emitter to described writing end 120；Second receiver module 112, receives the second infrared signal sent after writing end 120 receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120；Described second infrared signal carries writing end 120 and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal；3rd receiver module 116, receiving the 3rd infrared signal sent after writing end 120 receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end 120 and sends the second infrared signal and the second interval received between the second ultrasonic pulse signal；First obtains module 113, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.The present invention utilizes the ejector system that intelligent terminal 110 carries, according to twice temporal information in the infrared signal received, it is possible to the writing end 120 position in writing region outside intelligent terminal 110 detected in real time, substantially increases the Experience Degree of user.
Refer to Figure 14, it is the block diagram of the second embodiment of a kind of ultrasonic sensing writing system of offer in the specific embodiment of the invention.As it can be seen, this system, including:
First receiver module 111, receives the first infrared signal that writing end 120 sends, sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, receives the second infrared signal sent after writing end 120 receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120；Described second infrared signal carries writing end 120 and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
3rd receiver module 116, receiving the 3rd infrared signal sent after writing end 120 receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end 120 and sends the second infrared signal and the second interval received between the second ultrasonic pulse signal.
4th receiver module 117, receives the 4th infrared signal writing pressure information carrying writing end 120 detection that writing end 120 sends.
First obtains module 113, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
Second obtains module 114, according to the position of described writing end 120 with described write pressure information, obtains handwriting trace.
In sum, the 4th receiver module 117, receive the 4th infrared signal writing pressure information carrying writing end 120 detection that writing end 120 sends, described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal；Second obtains module 114, according to the position of described writing end 120 with described write pressure information, obtains handwriting trace；Interval time that intelligent terminal 110 sends according to writing end 120 and write the position that pressure can determine writing end 120 fast and accurately and the track write, it is achieved the identification of writing end 120 handwriting trace.
Refer to Figure 15, it is the block diagram of the 3rd embodiment of a kind of ultrasonic sensing writing system of offer in the specific embodiment of the invention.As it can be seen, this system, including:
First receiver module 111, receives the first infrared signal that writing end 120 sends, sends the first ultrasonic pulse signal by the first emitter to described writing end 120.
Second receiver module 112, receives the second infrared signal sent after writing end 120 receives the first ultrasonic pulse signal, sends the second ultrasonic pulse signal by the second emitter to described writing end 120；Described second infrared signal carries writing end 120 and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal.
3rd receiver module 116, receiving the 3rd infrared signal sent after writing end 120 receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end 120 and sends the second infrared signal and the second interval received between the second ultrasonic pulse signal.
5th receiver module 118, receives the 5th infrared signal writing digital quantity corresponding to pressure carrying writing end 120 acquisition that writing end 120 sends.
First obtains module 113, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end 120.
3rd obtains module 115, according to the position of described writing end 120 and described digital quantity, obtains written handwriting.
In sum, the 5th receiver module 118, receive the 5th infrared signal writing digital quantity corresponding to pressure carrying writing end 120 acquisition that writing end 120 sends, described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal；3rd obtains module 115, according to the position of described writing end 120 and described digital quantity, obtains written handwriting；Position that interval time that intelligent terminal 110 sends according to writing end 120, the digital quantity corresponding with writing pressure can determine writing end 120 fast and accurately and the person's handwriting write, it is achieved the identification of writing end 120 written handwriting.
Refer to Figure 16, it is the block diagram of the first embodiment of a kind of writing end 120 of offer in the specific embodiment of the invention.As it can be seen, this writing end 120, including:
Sending module 126, sends the first infrared signal to intelligent terminal 110.
First sending module 121, receive the first ultrasonic pulse signal sent after intelligent terminal 110 receives described first infrared signal by the first emitter, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, is received the second ultrasonic pulse signal sent by the second emitter after intelligent terminal 110 receives described second infrared signal, calculates the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
5th sending module 125, the 3rd infrared signal carrying described second interval time is sent to described intelligent terminal 110, so that described intelligent terminal 110 is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end 120.
In sum, sending module 126, send the first infrared signal to intelligent terminal 110；First sending module 121, receive the first ultrasonic pulse signal sent after intelligent terminal 110 receives described first infrared signal by the first emitter, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110；Second sending module 122, is received the second ultrasonic pulse signal sent by the second emitter after intelligent terminal 110 receives described second infrared signal, calculates the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal；5th sending module 125, the 3rd infrared signal carrying described second interval time is sent to described intelligent terminal 110, so that described intelligent terminal 110 is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end 120.The present invention utilizes the writing end 120 with infrared transmitter and sensing sound wave to obtain ultrasound wave and is transferred to the first emitter and the interval time of the second emitter from writing end 120, and the time of acquisition is sent to intelligent terminal 110 by infrared signal, so that described intelligent terminal 110 obtains the position of writing end 120, and writing end 120 only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end 120 greatly.
Refer to Figure 17, it is the block diagram of the second embodiment of a kind of writing end 120 of offer in the specific embodiment of the invention.As it can be seen, this writing end 120, including:
Sending module 126, sends the first infrared signal to intelligent terminal 110.
First sending module 121, receive the first ultrasonic pulse signal sent after intelligent terminal 110 receives described first infrared signal by the first emitter, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, is received the second ultrasonic pulse signal sent by the second emitter after intelligent terminal 110 receives described second infrared signal, calculates the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
5th sending module 125, the 3rd infrared signal carrying described second interval time is sent to described intelligent terminal 110, so that described intelligent terminal 110 is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end 120.
3rd sending module 123, detects and writes pressure, sends and carries the 4th infrared signal writing pressure information, so that described intelligent terminal 110 according to the position of described writing end 120 and described writes pressure information, obtains handwriting trace.
In sum, the 3rd sending module 123, detect and write pressure, send and carry the 4th infrared signal writing pressure information, so that described intelligent terminal 110 according to the position of described writing end 120 and described writes pressure information, obtain handwriting trace；Described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.Writing end 120 is by the time of twice ultrasonic transmission and writes pressure and is sent to intelligent terminal 110, so that intelligent terminal 110 obtains the coordinate position of writing end 120, and be whether 0 judge whether this coordinate position is write according to writing pressure, thus obtaining the handwriting trace of writing pencil, and writing end 120 only needs certain power when sending infrared data, it is possible to increase the cruising time of writing end 120 greatly.
Refer to Figure 18, it is the block diagram of the 3rd embodiment of a kind of writing end 120 of offer in the specific embodiment of the invention.As it can be seen, this writing end 120, including:
Sending module 126, sends the first infrared signal to intelligent terminal 110.
First sending module 121, receive the first ultrasonic pulse signal sent after intelligent terminal 110 receives described first infrared signal by the first emitter, calculate the first interval time sending the first infrared signal and receiving between the first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal 110.
Second sending module 122, is received the second ultrasonic pulse signal sent by the second emitter after intelligent terminal 110 receives described second infrared signal, calculates the second interval time sending the second infrared signal and receiving between the second ultrasonic pulse signal.
5th sending module 125, the 3rd infrared signal carrying described second interval time is sent to described intelligent terminal 110, so that described intelligent terminal 110 is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end 120.
4th sending module 124, obtain and write the digital quantity that pressure is corresponding, send to described intelligent terminal 110 and write the 5th infrared signal of digital quantity corresponding to pressure described in carrying, so that described intelligent terminal 110 is according to the position of described writing end 120 and described digital quantity, obtain written handwriting；Described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
In sum, 4th sending module 124, obtain and write the digital quantity that pressure is corresponding, the 5th infrared signal writing digital quantity corresponding to pressure described in carrying is sent to described intelligent terminal 110, so that described intelligent terminal 110 is according to the position of described writing end 120 and described digital quantity, obtain written handwriting；Described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.The digital quantity that the time of twice ultrasonic transmission is corresponding with writing pressure is sent to intelligent terminal 110 by writing end 120, so that intelligent terminal 110 obtains the coordinate position of writing end 120, and according to the value writing digital quantity corresponding to pressure judges whether there is the dynamics write and write on this coordinate position, thus obtaining the written handwriting of writing pencil, and writing end 120 only needs certain power when sending infrared data, the cruising time of writing end 120 can be increased greatly, improve the Experience Degree of user.
The know-why of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explanation principles of the invention, and can not be construed to limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art need not pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes fall within protection scope of the present invention.

Claims (13)

1. the method that a ultrasonic sensing is write, it is characterised in that including:
The first infrared signal that intelligent terminal for reception sends to writing end, sends the first ultrasonic pulse signal by the first emitter to described writing end；
Writing end receives described first ultrasonic pulse signal, calculate the first interval time sending described first infrared signal and receiving between described first ultrasonic pulse signal, send the second infrared signal carrying described first interval time to described intelligent terminal；
Intelligent terminal for reception, to described second infrared signal, sends the second ultrasonic pulse signal by the second emitter to described writing end；
Writing end receives described second ultrasonic pulse signal, calculates the second interval time sending the second infrared signal and receiving between described second ultrasonic pulse signal, sends the 3rd infrared signal carrying described second interval time to described intelligent terminal；
Intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtains the position of writing end.
2. method according to claim 1, it is characterised in that described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also includes:
Writing end detects writes pressure, sends to described intelligent terminal and carries the 4th infrared signal writing pressure information；
Described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also includes:
Intelligent terminal is according to the position of described writing end and described writes pressure information, obtains handwriting trace.
3. method according to claim 2, it is characterised in that described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
4. method according to claim 1, it is characterised in that described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also includes:
Writing end obtains and writes the digital quantity that pressure is corresponding, sends the 5th infrared signal writing digital quantity corresponding to pressure described in carrying to described intelligent terminal；
Described intelligent terminal, according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also includes:
Intelligent terminal, according to the position of described writing end and described digital quantity, obtains written handwriting.
5. method according to claim 4, it is characterised in that described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
6. the method according to any one of claim 1-5, it is characterized in that, described intelligent terminal is according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, and the group of equations of the position obtaining writing end is:
( x - a 1 ) 2 + ( y - b 1 ) 2 = x t 2 ( x - a 2 ) 2 + ( y - b 2 ) 2 = y t 2 x t = v * t 1 y t = v * t 2 ;
Wherein, (a1, b1) represents the coordinate of the first emitter, and (a2, b2) represents the coordinate of the second emitter, and v represents the speed of sound transmission, t1Represent the first interval time, t2Represented for the second interval time；
In the common point of two circles that equation represents x > 0 (x, y) for coordinate points.
7. method according to claim 1, it is characterized in that, the acoustic signals that first speaker of described first ultrasonic pulse signal and the second ultrasonic pulse signal respectively intelligent terminal side and the second speaker send respectively mix with original audio signal composition ultrasonic signal, signal frequency is 22KHz.
8. method according to claim 1, the infrared receiver sensor that described first infrared signal, the second infrared signal and the 3rd infrared signal are installed by intelligent terminal side receives.
9. the method that intelligent terminal's ultrasonic sensing is write, it is characterised in that including:
Receive the first infrared signal that writing end sends, send the first ultrasonic pulse signal by the first emitter to described writing end；
Receive the second infrared signal sent after writing end receives the first ultrasonic pulse signal, send the second ultrasonic pulse signal by the second emitter to described writing end；Described second infrared signal carries writing end and sends the first infrared signal and the first interval time received between the first ultrasonic pulse signal；
Receiving the 3rd infrared signal sent after writing end receives the second ultrasonic pulse signal, described 3rd infrared signal carries writing end and sends the second infrared signal and the second interval time received between the second ultrasonic pulse signal；
According to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, obtain the position of writing end.
10. method according to claim 9, it is characterised in that described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also includes:
Receive the 4th infrared signal writing pressure information carrying writing end detection that writing end sends；
Described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also include:
Position according to described writing end and described write pressure information, obtains handwriting trace.
11. method according to claim 10, it is characterised in that described 4th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
12. method according to claim 9, it is characterised in that described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, before obtaining the position of writing end, also include:
Receive the 5th infrared signal writing digital quantity corresponding to pressure carrying writing end acquisition that writing end sends；
Described according to the position relationship between described first emitter and the second emitter, described first interval time, the second interval time, after obtaining the position of writing end, also include:
Position according to described writing end and described digital quantity, obtain written handwriting.
13. method according to claim 11, it is characterised in that described 5th infrared signal includes the first infrared signal, the second infrared signal or the 3rd infrared signal.
CN201511000607.0A 2015-12-24 2015-12-24 Ultrasonic sensing writing method and system, intelligent terminal and writing end Pending CN105786222A (en)

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