CN1670756A

CN1670756A - Online identification method for hand-written character

Info

Publication number: CN1670756A
Application number: CN 200410075850
Authority: CN
Inventors: 赵新平
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-30
Filing date: 2004-12-30
Publication date: 2005-09-21

Abstract

This invention discloses one handwriting character identification method, which comprises the following steps: setting direction sensor inside the pen cylinder and outside pen core and setting pressure sensor on top of pen core; testing handwriting status through pressure sensor; testing the pressure between the pen core and pen pipe to testing pen core and pen pipe contacting position to identify the pen moving direction to form stroke characteristics, wherein, the continuous stroke characteristics form the codes and to identify the character machine codes through the software.

Description

A kind of online identification method for hand-written character

Affiliated technical field

The present invention relates to computer character input technology field, specifically a kind of can either be on common paper writing words, also can be used for the hand-written on-line identification method of pen type of personal computer character input.

Background technology

Writing pencil is one of important tool of computing machine typing character, along with portable electric device, such as being extensive use of of mobile phone, palm PC, individual digital computer, utilizes writing pencil input computer character will become more important.But existing hand-written recognition method all is the person's handwriting that detects written character by the pressure sensitivity handwriting pad, online again identification, and this kind method can only be worked on handwriting pad, uses very inconvenient.

Summary of the invention

In order to overcome the deficiency that prior art exists, the invention provides a kind of both can be the same with conventional pen on plain paper writing words, can be used for the input of personal computer character again, and needn't use the hand script Chinese input equipment recognition methods of handwriting pad.

We with pen on paper during written character, nib can be subjected to the friction force and the holding power of paper, wherein the direction of friction force is opposite with the direction of motion of nib, according to this principle, the technical solution adopted for the present invention to solve the technical problems is: in writing pencil inside, be provided for discerning the direction sensor of a direction of motion between the pen core and the shaft of a writing brush, the pressure transducer that is used for detecting the state of writing be set in the pen core upper end.Pressure direction during direction of passage sensor written character between the pen core and the shaft of a writing brush or the contact position of the pen core and the shaft of a writing brush, discern the direction of motion of pen, and forming the feature of this stroke, continuous stroke feature constitutes the condition code of this character, identifies this character by identification software again.Wherein direction sensor can have following three kinds of modes:

1, by being arranged in the shaft of a writing brush, the annular pressure sensor around the pen core constitutes, and pen core is owing to the effect with paper friction force can trigger the annular pressure sensor when writing;

2, by being arranged in the shaft of a writing brush, electric conductor around the pen core and conducting ring constitute, and the external diameter of conducting ring is littler than the internal diameter of electric conductor, and pen core touches electric conductor owing to the effect with the paper friction can drive conducting ring when writing;

3, by being arranged in the shaft of a writing brush, open annular resistance around the pen core and conducting ring constitute, and the internal diameter of the external diameter ratio open ring resistance of conducting ring is little, and pen core touches open annular resistance owing to the effect with paper friction force can drive conducting ring when writing.

The present invention's advantage compared with prior art mainly is simple in structure, easy to use, is widely used, both can be on common paper writing words, also can be used for the input of personal computer character, and be easy to learn and use.

Description of drawings

Below in conjunction with drawings and Examples the present invention is elaborated, in the accompanying drawing:

Fig. 1 is an embodiment of the invention perspective view;

Fig. 2 is an embodiment of the invention direction sensor cross-sectional structure synoptic diagram;

Fig. 3 is second kind of direction sensor cross-sectional structure of embodiment of the invention synoptic diagram;

Fig. 4 is the third direction sensor cross-sectional structure synoptic diagram of the embodiment of the invention;

Fig. 5 is the circuit block diagram of the embodiment of the invention;

Fig. 6 is the process flow diagram of identifying of the present invention.

1. direction sensors among the figure, 2. the shaft of a writing brush is 3. write pen core, 4. pressure transducer, 5. display unit, 6. surface-mounted integrated circuit, 7. power supply, the 8. cap for brush, 9. transmission interface, 10. storer, 11. microprocessor, 12. electric conductors, 13. open type ring resistances, 14. conducting rings, 15. annular pressure sensors.

Embodiment

As shown in Figure 1, it is the writing pencil of one embodiment of the invention, and this writing pencil comprises the shaft of a writing brush 2 that each assembly is set and is arranged on writes pen core 3 in the shaft of a writing brush 2, and the upper end of the shaft of a writing brush 2 is with the cap for brush 8 of a portable band geometrical clamp.Mainly be in the shaft of a writing brush 2, be provided with for the power supply 7 of each electronic package electric power, surface-mounted integrated circuit 6 and and surface-mounted integrated circuit 6 that electrically connect and be arranged on and write pen core 3 tops and be used for distinguishing the pressure transducer 4 of the state of writing and be arranged on writing direction sensor 1 and the display unit 5 that is used for distinguishing nib direction of motion between pen core 3 lower ends and the shaft of a writing brush 2.That uses in the shaft of a writing brush 2 writes the atom oil refill that pen core 3 is writing words on common paper.

As shown in Figure 2, direction sensor 1 is to be made of conducting ring 14 and 8 electric conductors 12 being arranged on around the conducting ring 14, and writes pen core 3 actings in conjunction and produces and write signal.

As shown in Figure 3, the another kind of structure of direction sensor 1 is to be made of conducting ring 14 and an open type ring resistance 13 being arranged on around the conducting ring 14.

As shown in Figure 4, the third structure of direction sensor 1 be by be arranged on write pen core 3 around 8 annular pressure sensors 15 constitute.

As shown in Figure 5, transmission interface 9 and storer 10 that surface-mounted integrated circuit 6 includes a microprocessor 11 and controlled by this microprocessor 11, this microprocessor 11 electrically connects with pressure transducer 4, direction sensor 1, display unit 5 and power supply 7 simultaneously, in order to carry out each assembly action of signal Processing and control.

Present embodiment, microprocessor 11 has been selected the STC89LE516AD with A/D translation function for use, the NCP1402 power supply chip is selected in power supply 7DC-DC conversion for use, pressure transducer 4 adopts pressure switch, display unit 5 is LCD LCDs of one 128 * 16 dot matrix, storer 10 is selected MM36SB020 for use, and transmission interface 9 is selected the NRF401 radio transmitting and receiving chip for use.

The online identifying of hand-written character of the present invention is:

When using this writing pencil written character, power supply chip NCP1402 is converted to the burning voltage of 3.3V with voltage by the cell voltage of 0.9～3V, supplies with each electronic package work.Nib because with the friction force of paper, when writing stroke, on opposite direction, produce deformation, trigger direction sensor and produce and write signal; Simultaneously since paper to writing the reacting force of pen core, the pressure transducer on pen core top is write in triggering, the two is through the A/D conversion, the binary code that the central processing unit of this character writing feature of formation description can be discerned, again by central processing unit be pre-stored in the storer condition code in the character repertoire and compare, identify this character, be uploaded to computing machine or be kept in the storer by transmission interface.

During writing Chinese characters, at first will define a time signal constant T as judging whether a complete Chinese character writes the sign that finishes.Central processing unit is judged detected presentation direction signal and pressure signal to have write a complete Chinese character or one section Chinese character, and is presented on the LCD LCDs.

When adopting as shown in Figure 3 direction sensor, the stroke identifying of writing pencil is: the resistance value of establishing ring resistance RW2 is R, when writing when horizontal, writing pencil direction of motion is for from left to right, because the reason of friction force, nib generation deformation, conducting ring touches the left side of ring resistance RW2, and this moment, the resistance of RW2 should be When writing when perpendicular, writing pencil direction of motion is for from top to bottom, and the resistance of RW2 should be 0; When writing when casting aside, writing pencil direction of motion be from last past lower left to motion, the resistance of RW2 will be changed to from 0 All the other strokes detect in the same manner.Central processing unit can be judged the stroke of writing according to the resistance variations of detected RW2.

When the direction sensor that adopts as shown in Figure 2, the stroke identifying of writing pencil is: when writing when horizontal, writing pencil direction of motion from left to right because the reason of friction force, nib generation deformation, conducting ring touches the electric conductor in left side; When writing when perpendicular, writing pencil direction of motion is for from top to bottom, and conducting ring contacts with the electric conductor of top; When writing left-falling stroke, to motion, the electric conductor that the conducting ring order is opposite with nib direction of motion contacts writing pencil from last past lower left; All the other strokes detect in the same manner.Central processing unit can be judged the stroke of writing according to the engagement sequence of detected conducting ring and electric conductor.

When the direction sensor that adopts as shown in Figure 4, the stroke identifying of writing pencil is similar with employing direction sensor as shown in Figure 2.

When a wordbook write and detect finish after, send detected Chinese character to microcomputer by the wireless serial transmission circuit, microcomputer is established a same serial ports or the wireless receiving circuit of USB mouth, the information that receives is passed to microcomputer handle.If have only writing pencil when work, the character of writing will be sent in the storer of writing pencil and store, and be sent in the microcomputer after waiting until and preserve.

Claims

1, a kind of online identification method for hand-written character is characterized in that: in the shaft of a writing brush (2) of writing pencil, pen core (3) is provided with direction sensor (1) on every side, and pressure transducer (4) is set in the upper end of pen core; Detect the state of writing of writing pencil by pressure transducer (4); Direction of passage sensor (1) detects the pressure between the pen core (3) and the shaft of a writing brush (2) or detects the contact position of the pen core (3) and the shaft of a writing brush (2), the direction of motion of identification pen, and formation stroke feature, continuous stroke feature constitutes the condition code of this written character, identifies the machine code of this written character again by identification software.

2, online identification method for hand-written character according to claim 1 is characterized in that: said direction sensor (1) is arranged in the shaft of a writing brush (2), pen core (3) annular pressure sensor (15) on every side.

3, online identification method for hand-written character according to claim 1 is characterized in that: said direction sensor (1) is arranged in the shaft of a writing brush (2), pen core (3) electric conductor (12) and conducting ring (14) on every side.

4, online identification method for hand-written character according to claim 1 is characterized in that: said direction sensor (1) is arranged in the shaft of a writing brush (2), pen core (3) open annular resistance (13) and conducting ring (14) on every side.

5, according to claim 3 or 4 described online identification method for hand-written character, it is characterized in that: said conducting ring (14) can be replaced by the pen core (3) that metal material is made.