CN111477066A - Calligraphy practicing method, device and system based on multi-array pressure sensor - Google Patents

Abstract

The invention discloses a calligraphy practicing method, a calligraphy practicing device and a calligraphy practicing system based on a multi-array pressure sensor, wherein the calligraphy practicing method comprises the following steps: acquiring calligraphy track characteristics uploaded by the copybook, and matching the calligraphy track characteristics with preset calligraphy track characteristic standards to obtain track characteristic difference parameters, wherein the calligraphy track characteristics respond to the real-time writing pressure of each measured point on the copybook; generating a quantitative evaluation scheme according to the track characteristic difference parameters, wherein the quantitative evaluation scheme is used for guiding calligraphy track characteristics of a writer; the calligraphy practicing method can remind a writer of the value of the pen power and the dwell time of the strokes during writing which should be noticed during the next writing, is convenient for remote teaching of calligraphy workers, is suitable for offline learning of learners, and can be widely used in families and schools.

Description

A method, device and system for calligraphy practice based on multi-array pressure sensor

technical field

The invention relates to the technical field of calligraphy practice, in particular to a calligraphy practice method, device and system based on a multi-array pressure sensor.

Background technique

The inheritance and development of calligraphy is a basic subject of Chinese cultural education. Learning Chinese calligraphy is inseparable from copybooks. In traditional teaching, the hand-to-hand mode is generally used. That is, teachers show students the beauty of calligraphy lines such as rhythm, strength, and layout through writing demonstrations. After students observe, they will practice copybooks (1). Because the fan characters in the copybook are static images, once the beginners leave the teacher's demonstration, they can't figure out the dynamic information of the calligraphy masters, such as the order of strokes, the method of moving the brush, and the rhythm of the strokes, which are crucial to learning calligraphy. The learning quality and efficiency of the learners are low, and if they write in a wrong copying environment for a long time, it will cause the writer to make mistakes without knowing it.

SUMMARY OF THE INVENTION

Based on the technical problems existing in the background art, the present invention proposes a calligraphy practice method, device and system based on a multi-array pressure sensor, which can remind the writer to pay attention to the value of the stroke force and the difference of the stroke when writing next. The length of stay is convenient for calligraphers to teach remotely and learners to learn offline, which can be widely used in families and schools.

A calligraphy practice method based on a multi-array pressure sensor proposed by the present invention includes a pen mechanism and a copybook, and a writer performs calligraphy practice on the copybook through the pen mechanism, and the calligraphy practice method includes:

The calligraphy trajectory features of the writer uploaded in the copybook are obtained, and the preset calligraphy trajectory feature benchmarks are matched to obtain the track feature difference parameters. The calligraphy trajectory features respond to the real-time writing pressure of each measured point on the copybook.

A quantitative evaluation scheme is generated according to the track feature difference parameter, and the quantitative evaluation solution is used to guide the calligraphy track feature of the writer.

Further, in obtaining the calligraphy trajectory feature of the writer uploaded by the copybook, matching with the preset calligraphy trajectory feature benchmark, and obtaining the track feature difference parameter, before acquiring the calligraphy trajectory feature of the writer uploaded by the copybook, the copybook obtains the writer's calligraphy trajectory feature. Calligraphy track feature, get the calligraphy track feature of the writer;

The calligraphy track of the writer obtained by the copybook specifically includes:

A plurality of measured points are preset on the copybook, pressure sensors are arranged on the measured points, and the plurality of pressure sensors form a multi-array pressure sensor;

The multi-array pressure sensor obtains the pressure value between the pen mechanism and the copybook, and obtains the real-time writing pressure of the writer at each measured point;

According to the real-time writing pressure, the calligraphy trajectory characteristics of the writer are obtained.

Further, according to the real-time writing pressure, the calligraphy trajectory characteristics of the writer are obtained, including:

According to the real-time writing pressure, the writing information function F(x, y, z) is constructed, and the calligraphy information of the writer at each measured point is obtained, and the calligraphy information includes the pressure information and coordinate information of each measured point;

Arrange and connect the pressure information of each measured point according to the writing time, generate a pressure change curve, arrange and connect the coordinate information of each measured point according to the writing time, generate a calligraphy track plane coordinate curve, and combine the pressure change curve and the calligraphy track plane coordinate curve Combining to get the calligraphic trajectory features of the writer.

Further, in obtaining the calligraphy track feature of the writer uploaded by the copybook, matching with the preset calligraphy track feature benchmark to obtain the track feature difference parameters, including:

Obtain the calligraphy trajectory feature uploaded by the copybook, where the calligraphy trajectory feature includes a pressure change curve and a plane coordinate curve of the calligraphy trajectory;

Differentiate the calligraphy trajectory feature to obtain the velocity feature and acceleration feature of each measured point;

Perform pressure calculation on the pressure information of each measured point in the pressure change curve, and obtain the pressure characteristics of each measured point;

Kalman filtering is performed on the velocity feature, acceleration feature, and pressure feature respectively, and the calligraphy trajectory feature after filtering is obtained;

Overlap and compare the filtered calligraphy track feature with the preset calligraphy track feature benchmark to obtain the difference area;

The velocity characteristics, acceleration characteristics, and pressure characteristics of each measured point in the difference area are compared with corresponding preset values, respectively, to obtain a characteristic deviation value of each measured point, and the characteristic deviation value is used as a trajectory characteristic difference parameter.

A calligraphy practice device based on a multi-array pressure sensor, comprising a support plate, a copybook and a host computer, a detection device for detecting the writing pressure of a writer on the copybook is arranged between the support plate and the copybook, and one surface of the plurality of detection devices is respectively attached to the Attached to the lower surface of the copybook, and the other surface is respectively fixed on the support plate, the input end of the detection device is connected with the preset measured point on the copybook, and the output end is connected with the input end of the upper computer;

The detection device is used to obtain the calligraphy track feature of the writer, match with the preset calligraphy track feature benchmark, and obtain the track feature difference parameter;

The host computer generates a quantitative evaluation scheme according to the difference parameters of the trajectory features, and the quantitative evaluation scheme is used to guide the calligraphy trajectory characteristics of the writer.

Further, the detection device includes a sensor measurement loop, a microcontroller, a multiplexer and a wireless transmitter. The input end of the sensor measurement loop is connected to a preset measured point on the copybook, and the output end is connected to the microcontroller. One output end of the microcontroller is connected to the input end of the host computer through a wireless transmitter, and the other output end is connected to the input end of the sensor measurement loop through a multiplexer.

Further, the sensor measurement circuit includes a plurality of pressure sensors, the input ends of the plurality of pressure sensors are respectively connected with the preset measured points on the copybook in a one-to-one correspondence, and the output ends are all connected with the input ends of the microcontroller.

A calligraphy practice system based on multi-array pressure sensors, including an acquisition matching module and a generating module;

The acquisition and matching module is used to acquire the calligraphy trajectory feature of the writer uploaded by the copybook, and match with the preset calligraphy track feature benchmark to obtain the track feature difference parameter, and the calligraphy track feature responds to the real-time writing pressure of each measured point on the copybook;

The generating module is used for generating a quantitative evaluation scheme according to the track feature difference parameter, and the quantitative evaluation plan is used to guide the calligraphy track feature of the writer.

A computer-readable storage medium on which several acquisition and classification programs are stored, the several acquisition and classification programs are used to be invoked by a processor and execute the above calligraphy practice method.

The advantages of the method, device and system for calligraphy practice based on multi-array pressure sensors provided by the present invention are: the method, device and system for calligraphy practice based on multi-array pressure sensors provided in the structure of the present invention are Set up a detection device to detect the force value exerted by the writer on the copybook and the dwell time during writing in real time. By comparing with the preset force and time, the expert system guidance and prompting opinions given by the quantitative evaluation plan are obtained to remind writing. When writing, the reader should pay attention to the size of the stroke force and the length of the stay time of the strokes when writing, which is convenient for calligraphers to teach remotely and offline learning for learners, which can be widely used in families and schools; the detection device on the copybook will obtain Before uploading the calligraphy trajectory features of the writers to the host computer, the pressure information calculation and Kalman filtering processing are performed on the calligraphy trajectory features, so that the information uploaded to the host computer is more accurate, and the practice quality and efficiency of the writers are improved.

Description of drawings

1 is a flow chart of the steps of a calligraphy practice method based on a multi-array pressure sensor of the present invention;

Fig. 2 is a kind of operation system schematic diagram of the calligraphy practice device based on multi-array pressure sensor of the present invention;

3 is a schematic structural diagram of a calligraphy practice device based on a multi-array pressure sensor of the present invention;

Among them, 1- copybook, 2- support board.

Detailed ways

Hereinafter, the technical solutions of the present invention will be described in detail through specific embodiments, and many specific details will be set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

1 to 3, a calligraphy practice method based on a multi-array pressure sensor proposed by the present invention includes a pen mechanism and a copybook, and a writer performs calligraphy practice on the copybook through the pen mechanism, and the calligraphy practice method includes:

S100: Acquire the calligraphy trajectory feature uploaded on the copybook, match with a preset calligraphy track feature benchmark to obtain a track feature difference parameter, and the calligraphy track feature responds to the real-time writing pressure of each measured point on the copybook;

When acquiring the calligraphy trajectory features of the writer, firstly, the writing information function F(x, y, z) is constructed to obtain the calligraphy information of the writer at the measured point, and the calligraphy trajectory feature of the writer is obtained through the calligraphy information of the measured point.

The track feature difference parameters include calligraphy track plane coordinates, speed features, acceleration features, and pressure features, and the pressure features correspond to the writing pressure of the writer on the copybook through the pen mechanism. x, y, and z are three mutually perpendicular directions in three-dimensional space.

S200 : Generate a quantitative evaluation plan according to the difference parameter of the track features, where the quantitative evaluation plan is used to guide the calligraphy track features of the writer.

The quantitative evaluation scheme is a scheme for adjusting the posture of the writer when writing, the writing pressure of the copybook, etc. according to the difference parameters of the trajectory characteristics, and finally realizes the characteristics of the calligraphy trajectory that guides the writer.

Through steps S100 to S200, the upper computer processes the calligraphy track features uploaded from the copybook, and then processes the calligraphy track features to obtain the track feature difference parameters, and gives the expert system guidance and prompting opinions through the quantitative evaluation plan, reminding the writer to write next. The movement of the strokes should be paid attention to when writing, so as to achieve the purpose of guiding the writer's calligraphy trajectory characteristics.

Preferably, in step S100: acquiring the calligraphy trajectory feature of the writer uploaded by the copybook, matching with the preset calligraphy trajectory feature benchmark, and obtaining the track feature difference parameter, before acquiring the calligraphy trajectory feature of the writer uploaded by the copybook, the copybook Obtain the calligraphy trajectory characteristics of the writer, and obtain the calligraphy trajectory characteristics of the writer;

The calligraphy track of the writer obtained by the copybook specifically includes:

S101: A plurality of measured points are preset on the copybook, pressure sensors are arranged on the measured points, and the plurality of pressure sensors form a multi-array pressure sensor;

S102: The multi-array pressure sensor obtains the pressure value between the pen mechanism and the copybook, and obtains the real-time writing pressure of the writer at each measured point;

S103: construct a writing information function F(x, y, z) according to the real-time writing pressure, and obtain the calligraphy information of the writer at each measured point, where the calligraphy information includes pressure information and coordinate information of each measured point;

S104: Arrange and connect the pressure information of each measured point according to the writing time, generate a pressure change curve, arrange and connect the coordinate information of each measured point according to the writing time, generate a calligraphy track plane coordinate curve, and connect the pressure change curve and the calligraphy track plane The combination of coordinate curves obtains the characteristics of the calligraphy trajectory of the writer.

According to steps S101 to S104, by setting a pair of measured points on the copybook, and setting pressure sensors on the measured points respectively, the pressure sensors detect the writing pressure of the writer on the copybook through the pen mechanism respectively, and the real-time writing pressure and the generated The area of real-time writing pressure builds the writing information function F together, and finally obtains the calligraphy trajectory feature of the writer.

As an embodiment, the calligraphy practice method includes S110 to S170:

S110: Obtain the calligraphy trajectory feature uploaded by copybook 1, where the calligraphy trajectory feature includes a pressure change curve and a plane coordinate curve of the calligraphy trajectory;

S120: Differentiate the calligraphy trajectory feature to obtain the speed feature and acceleration feature of each measured point;

S130: Perform pressure calculation on the pressure information of each measured point in the pressure change curve to obtain the pressure characteristics of each measured point;

S140: Perform Kalman filter processing on the velocity feature, the acceleration feature, and the pressure feature, respectively, to obtain the calligraphy trajectory feature after filtering;

Kalman filter processing is to filter the noise and interference information in the velocity feature, acceleration feature and pressure feature to obtain more accurate feature parameters.

S150: Overlapping and comparing the filtered calligraphy track feature with the preset calligraphy track feature benchmark to obtain a difference area;

S160: Comparing the velocity characteristics, acceleration characteristics, and pressure characteristics of each measured point in the difference area with corresponding preset values, respectively, to obtain a characteristic deviation value of each measured point, and the characteristic deviation value is used as a trajectory characteristic difference parameter.

S170: Generate a quantitative evaluation plan according to the track feature difference parameter, where the quantitative evaluation plan is used to guide the calligraphy track feature of the writer.

Through steps S110 to S170, the writer can correct the current writing state according to the quantitative evaluation scheme and the constructed writing information function F. After processing, the quantitative evaluation scheme is generated again, so as to realize the effect of adjustment by the writer while writing.

A calligraphy practice device based on a multi-array pressure sensor, comprising a support plate 2, a copybook 1 and a host computer, a detection device for detecting the writing pressure of a writer on the copybook 1 is arranged between the support plate 2 and the copybook 1, and a plurality of detection devices One surface is attached to the lower surface of the copybook 1 respectively, and the other surface is respectively fixed on the support plate 2, the input end of the detection device is connected with the preset measured point on the copybook 1, and the output end is connected with the input end of the host computer;

The detection device is used to obtain the calligraphy track feature of the writer, match with the preset calligraphy track feature benchmark, and obtain the track feature difference parameter;

The host computer generates a quantitative evaluation scheme according to the difference parameters of the trajectory features, and the quantitative evaluation scheme is used to guide the calligraphy trajectory characteristics of the writer.

Further, the detection device includes a sensor measurement loop, a microcontroller, a multiplexer and a wireless transmitter, the input end of the sensor measurement loop is connected to the preset measured point on the copybook 1, and the output end is connected to the microcomputer. The input end of the controller is connected, one output end of the microcontroller is connected to the input end of the host computer through a wireless transmitter, and the other output end is connected to the input end of the sensor measurement loop through a multiplexer.

The sensor measurement circuit includes a plurality of pressure sensors, the input ends of the plurality of pressure sensors are respectively connected with the preset measured points on the copybook 1 in a one-to-one correspondence, and the output ends are all connected with the input ends of the microcontroller.

The main control chip of the microcontroller adopts the STM32F207ZET6 single-chip microcomputer, which realizes the three functions of collection, processing and transmission of the pressure sensor film row and column signals. The pressure sensor adopts a flexible lattice pressure sensor, the multiplexer adopts AD conversion chip, and 3 AD conversion chips are used, which are addressed by the single-chip program and control the switching of 24 columns of pressure signals in turn; after constructing the writing information function F(x , y, z), used to represent the writing information of each specific effective pressure point, where x, y represent the specific coordinates of the effective pressure point on the pressure array, z represents the force on each pressure point, that is, the brush is at the effective pressure point The calligraphy track feature data is processed through pressure information calculation and Kalman filtering; the wireless transmitter is used to realize data communication between the single-chip microcomputer and the host computer, and transmit the calligraphy track feature data to the host computer, so as to obtain the data of the calligraphy track. A quantitative evaluation scheme for the characteristics of calligraphy trajectory for guiding writers.

When the copybook 1 is used for practice, the host computer stores the calligraphy trajectory features of the calligraphy master and the learner, and matches and compares the two. 1. The upper detection device detects that the time spent by the learner on each stroke is more or less than 0.1 seconds of the time spent by the calligraphy master as a qualified interval. When the learner stays on the stroke for longer than the qualified interval, the practitioner will be reminded The writing speed is correspondingly accelerated or slowed down; the strength of each stroke used by the calligrapher when writing Chinese characters is regarded as the standard strength, and the strength of the learner's writing strokes exceeding or less than 0.1N of the strength of the calligrapher is regarded as the standard strength. Qualified, when the force used by the learner on the writing stroke exceeds or is less than 0.1N of the strength of the calligraphy master, the learner is reminded to increase or decrease the writing force when writing next. Realize that learners use the calligraphy master's model characters as a copy, adjust the writing strength and the residence time of the writing strokes in real time when writing, and use the voice reminder to adjust the strokes while listening, which improves the quality and efficiency of calligraphy. In traditional copywriting, the writer needs to compare the writing by himself, and can only judge the quality of the writing according to the naked eye, which is a waste of time and can not achieve the defect of effective practice.

As shown in Figures 2 and 3, a calligraphy practice device based on a multi-array pressure sensor includes an acquisition matching module and a generating module;

The acquisition and matching module is used to acquire the calligraphy trajectory feature of the writer uploaded by the copybook 1, and match with the preset calligraphy trajectory feature benchmark to obtain the track feature difference parameter, and the calligraphy track feature responds to the real-time writing pressure of each measured point on the copybook 1. ;

The generating module is used for generating a quantitative evaluation scheme according to the track feature difference parameter, and the quantitative evaluation plan is used to guide the calligraphy track feature of the writer.

A computer-readable storage medium stores several acquisition and classification programs on the computer-readable storage medium, and the several acquisition and classification programs are used to be invoked by a processor to execute the calligraphy practice method of the present application.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (9)

1. a kind of calligraphy practice method based on multi-array pressure sensor, comprises pen mechanism and copybook, and the writer carries out calligraphy practice on copybook by pen mechanism, it is characterized in that, calligraphy practice method comprises: Acquire the calligraphy track feature uploaded by the copybook, match with the preset calligraphy track feature benchmark, and obtain the track feature difference parameter, and the calligraphy track feature responds to the real-time writing pressure of each measured point on the copybook; A quantitative evaluation scheme is generated according to the track feature difference parameter, and the quantitative evaluation solution is used to guide the calligraphy track feature of the writer. 2. the calligraphy practice method based on multi-array pressure sensor according to claim 1, is characterized in that, in obtaining the calligraphy track feature of the writer uploading in the copybook, it is matched with the preset calligraphy track feature benchmark, and the track feature difference is obtained In the parameters, before acquiring the calligraphy trajectory feature of the writer uploaded by the copybook, the copybook obtains the calligraphy trajectory feature of the writer, and obtains the calligraphy trajectory feature of the writer; The calligraphy track of the writer obtained by the copybook specifically includes: A plurality of measured points are preset on the copybook, pressure sensors are arranged on the measured points, and the plurality of pressure sensors form a multi-array pressure sensor; The multi-array pressure sensor obtains the pressure value between the pen mechanism and the copybook, and obtains the real-time writing pressure of the writer at each measured point; According to the real-time writing pressure, the calligraphy trajectory characteristics of the writer are obtained. 3. the calligraphy practice method based on multi-array pressure sensor according to claim 2, is characterized in that, described according to the real-time writing pressure to obtain the calligraphy track feature of the writer, comprising: According to the real-time writing pressure, the writing information function F(x, y, z) is constructed, and the calligraphy information of the writer at each measured point is obtained, and the calligraphy information includes the pressure information and coordinate information of each measured point; Arrange and connect the pressure information of each measured point according to the writing time, generate a pressure change curve, arrange and connect the calligraphy trajectory plane coordinates of each measured point according to the writing time, generate a calligraphy trajectory plane coordinate curve, and combine the pressure change curve with the calligraphy trajectory plane. The combination of coordinate curves obtains the characteristics of the calligraphy trajectory of the writer. 4. the calligraphy practice method based on multi-array pressure sensor according to claim 3, is characterized in that, in obtaining the calligraphy track feature of the writer uploaded in copybook, match with preset calligraphy track feature benchmark, obtain track feature difference parameters, including: Obtain the calligraphy trajectory feature uploaded by the copybook, where the calligraphy trajectory feature includes a pressure change curve and a plane coordinate curve of the calligraphy trajectory; Differentiate the calligraphy trajectory feature to obtain the velocity feature and acceleration feature of each measured point; Perform pressure calculation on the pressure information of each measured point in the pressure change curve, and obtain the pressure characteristics of each measured point; Kalman filtering is performed on the velocity feature, acceleration feature, and pressure feature respectively, and the calligraphy trajectory feature after filtering is obtained; Overlap and compare the filtered calligraphy track feature with the preset calligraphy track feature benchmark to obtain the difference area; The velocity characteristics, acceleration characteristics, and pressure characteristics of each measured point in the difference area are compared with corresponding preset values, respectively, to obtain a characteristic deviation value of each measured point, and the characteristic deviation value is used as a trajectory characteristic difference parameter. 5. A calligraphy practice device based on a multi-array pressure sensor, comprising a copybook (1), a support plate (2) and a host computer, characterized in that, between the support plate (2) and the copybook (1), a device for detecting writing is provided A detection device for the user's writing pressure on the copybook (1), one surface of the plurality of detection devices is respectively attached to the lower surface of the copybook (1), and the other surface is respectively fixed on the support plate (2), and the input end of the detection device is connected to the copybook (2). (1) The preset measured point connection, the output end is connected with the input end of the upper computer; The detection device is used to obtain the calligraphy track feature of the writer, match with the preset calligraphy track feature benchmark, and obtain the track feature difference parameter; The host computer generates a quantitative evaluation scheme according to the difference parameters of the trajectory features, and the quantitative evaluation scheme is used to guide the calligraphy trajectory characteristics of the writer. 6. The calligraphy practice device based on a multi-array pressure sensor according to claim 5, wherein the detection device comprises a sensor measurement loop, a microcontroller, a multiplexer and a wireless transmitter, and the sensor measures The input end of the loop is connected to the preset measured point on the copybook (1), and the output end is connected to the input end of the microcontroller. One of the output ends of the microcontroller is connected to the input end of the host computer through a wireless transmitter, and the other An output is connected to the input of the sensor measurement loop through a multiplexer. 7 . The calligraphy practice device based on a multi-array pressure sensor according to claim 6 , wherein the sensor measurement circuit comprises a plurality of pressure sensors, and the input ends of the plurality of pressure sensors are respectively preset with the copybook ( 1 ). 8 . The measured points are connected one-to-one, and the output terminals are connected with the input terminals of the microcontroller. 8. a calligraphy practice system based on multi-array pressure sensor, is characterized in that, comprises acquisition matching module and generation module; The acquisition and matching module is used to acquire the calligraphy trajectory feature of the writer uploaded in the copybook (1), and match it with the preset calligraphy track feature benchmark to obtain the track feature difference parameter, and the calligraphy track feature responds to each measured point on the copybook (1). real-time writing pressure; The generating module is used for generating a quantitative evaluation scheme according to the track feature difference parameter, and the quantitative evaluation plan is used to guide the calligraphy track feature of the writer. 9. A computer-readable storage medium, characterized in that, a plurality of acquisition and classification programs are stored on the computer-readable storage medium, and the plurality of acquisition and classification programs are used to be invoked by a processor and execute any one of claims 1 to 4. a described method.

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