CN202457329U - Automatic page turning reading chair based on sight line tracking and control device of automatic page turning reading chair - Google Patents

Abstract

The utility model discloses an automatic page-turning reading chair based on sight tracking and a control device thereof. The reading chair includes a seat and a control device arranged on the seat; the seat is provided with a curved arm, one end of the curved arm is arranged on the seat, and the other end is connected with a vertical bar; the vertical bar A bookshelf is arranged on the top; a camera is arranged on the top of the bookshelf, a pivotable left lever and a right lever are respectively arranged on both sides of the bookshelf, and a pivotable and translational ruler is arranged in the middle of the bookshelf; The signal input end of the control device is connected with the camera, and its signal output end is connected with the left and right rods. The utility model has reasonable structural design of the automatic page-turning reading chair based on line of sight tracking. The reading chair fully utilizes the knowledge of ergonomics and is comfortable and durable. In addition, the curved frame is designed in an arc shape, and its overall coordination can be adjusted arbitrarily. To meet the needs of users to read in a half-lying state, thereby reducing the pressure on the cervical spine, lumbar spine and shoulders. The use of the eye-tracking-based page-turning technology can free the user's hands, thereby achieving the purpose of comfortable reading.

Description

Automatic page-turning reading chair and its control device based on eye-tracking

technical field

The utility model relates to the technical field of furniture and line of sight tracking, in particular to an automatic page-turning reading chair based on line of sight tracking and a control device thereof.

Background technique

At present, readers usually use both hands to turn the pages of books. Because readers do not have the habit of sitting, it is easy to cause adverse effects such as spinal injuries and decreased eyesight. However, with the help of traditional human-computer interaction methods, such as using a mouse, keyboard, tablet, etc., although the above situation can be improved. However, for some special cases, such as persons with upper limb disabilities and patients with severe spinal diseases, these human-computer interaction methods are powerless.

"What you see is what you get" shows that the visual system is an extremely important part of human beings to obtain external information, so it is a very efficient means to use the eye tracking of the visual system to realize human-computer interaction.

At present, the known eye-tracking device needs to use a specific helmet device to obtain the focus of the line of sight, although this method can improve the accuracy of the eye-tracking device. This equipment is not only expensive, but also cumbersome and not comfortable enough for the user to wear. For specific occasions that do not require high accuracy, such as when reading a book, these eye tracking devices are somewhat overkill.

To sum up, there is currently no suitable instrument and suitable method for readers' flip-book reading. ``

Utility model content

The technical problem to be solved by the utility model patent is to provide a comfortable, durable and properly coordinated automatic page-turning reading chair based on eye-tracking.

Further, the utility model provides a control device for an automatic page-turning reading chair based on eye-tracking.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an automatic page-turning reading chair based on eye-tracking, including a seat and a control device arranged on the seat; the seat is provided with a curved arm, One end of the curved arm is arranged on the seat, and the other end is connected with the vertical rod; a bookshelf is arranged on the vertical rod; a camera is arranged on the top of the bookshelf, and pivotable The left bar and the right bar of the bookshelf are provided with a pivotable and translational ruler in the middle of the bookshelf; the signal input end of the control device is connected with the camera, and the signal output end is connected with the left and right bars.

Preferably, the seat is provided with a backrest, the curved arm is arranged on the backrest, and the curved arm is an elastic arc-shaped curved wall.

Preferably, the control device is located at the bottom of the seat.

A control device for an automatic page-turning reading chair based on gaze tracking, comprising an image acquisition module, an eye movement detection module, a signal processing module, an A/D conversion module and a pulse control module; the above modules are connected in sequence.

Preferably, the eye movement detection module includes an acquisition card for image difference, geometric transformation, compensation and correction, to extract the eyeball trajectory, extract the trajectory line to calculate the midpoint of the line of sight, and compare it with the initial position.

Preferably, the signal processing module includes a signal amplification circuit and a filter circuit for receiving the amplified signal.

Preferably, the A/D conversion module includes a single-chip microcomputer control circuit, a JTAG port, a reference voltage circuit, an input voltage circuit and a power supply circuit, and the power supply circuit is connected to the input voltage circuit and the single-chip microcomputer control circuit respectively; the JTAG port, The reference voltage circuit and the input voltage circuit are connected to the single-chip microcomputer control circuit together.

Preferably, the pulse control module 25 includes power switch tubes VT1-VT4, diodes VD1-VD4 and a motor; the emitters of the power switch tubes VT1 and VT3 are electrically connected to the motor, and the collectors of the power switch tubes VT1 and VT3 The cathodes of the diodes VD1 and VD3 are electrically connected respectively; the anodes of the diodes VD1 and VD3 are electrically connected to the motor; the collectors of the power switch tubes VT2 and VT4 are electrically connected to the motor, and the emission of the power switch tubes VT2 and VT4 The poles are electrically connected to the anodes of the diodes VD2 and VD4 respectively, and the cathodes of the diodes VD2 and VD4 are electrically connected to the motor.

Compared with the prior art, the utility model has the following beneficial effects: the structure design of the automatic page-turning reading chair based on sight tracking is reasonable, the reading chair fully utilizes the knowledge of ergonomics, and is comfortable and durable; in addition, the curved frame is The arc-shaped design, its overall coordination and the orientation can be adjusted arbitrarily, so as to meet the needs of users to read in a half-lying state, thereby reducing the pressure on the cervical spine, lumbar spine and shoulders. The use of the eye-tracking-based page-turning technology can free the user's hands, thereby achieving the purpose of comfortable reading.

Description of drawings

Fig. 1 is the structural diagram of the automatic page-turning reading chair based on the sight tracking of the utility model;

Fig. 2 is the top structural view of accompanying drawing 1;

Fig. 3 is a bookshelf structure diagram of the automatic page-turning reading chair based on sight tracking of the present invention;

Fig. 4 is a working principle diagram of the reading chair of the present invention;

Fig. 5 is a principle diagram of pupil left eye movement;

Fig. 6 is a principle diagram of pupil moving to the right;

Fig. 7 is a processing flow chart of the eye movement detection module of the control device of the automatic page-turning reading chair based on sight tracking in the present invention;

Fig. 8 is a circuit block diagram of the A/D conversion module of the control device of the automatic page-turning reading chair based on sight tracking of the utility model;

Fig. 9 is a structural block diagram of the pulse control module of the control device of the automatic page-turning reading chair based on sight tracking of the present utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

As shown in FIGS. 1 and 2 , the automatic page-turning reading chair based on eye-tracking includes a seat 1 and a control device arranged on the seat 1 , and the control device 2 is arranged at the bottom of the seat 1 . The seat 1 is provided with a backrest 10 , and the curved arm 3 is arranged on the backrest 10 . One end of the curved arm 3 is arranged on the seat 1, and the other end thereof is connected with the vertical bar 4. A bookshelf 5 is arranged on the vertical bar 4 .

As shown in Figure 3, a camera 6 is arranged on the top of the bookshelf 5, a pivotable left lever 7 and a right lever 8 are respectively arranged on both sides of the bookshelf 6, and a pivotable and translational ruler is arranged in the middle of the bookshelf 6 9. The signal input end of the control device is connected with the camera 6, and its signal output end is connected with the left and right bars 7,8 respectively.

When reading, left and right bars 7,8 all press on the page. When it is necessary to turn the book to the left, the right rod 8 is connected to the electrostatic circuit, and at the same time, it is rotated upward to suck up the pages, and then the ruler 9 starts to turn to the gap between the pages of the book, and the right rod 8 disconnects the electrostatic circuit; In the middle, the right rod 8 turns downward until it presses on the page; when the ruler turns over the middle of the book, the left lever 7 starts to turn upward; when the page is turned to the left, the left lever 7 turns downward until it is pressed against the page superior. The process of turning the book to the right is opposite to the above sequence.

As shown in FIG. 4 , a control device for an automatic page-turning reading chair based on gaze tracking includes an image acquisition module 21, an eye movement detection module 22, a signal processing module 23, an A/D conversion module 24 and a pulse control module 25; The above modules are connected sequentially.

As shown in FIG. 7 , the eye movement detection module 22 includes image difference, geometric transformation, compensation and correction, extracting the eye movement trajectory, extracting the trajectory line and calculating the midpoint of the line of sight, and comparing it with the initial position Acquisition card 221. The signal processing module 23 includes a signal amplification circuit and a filter circuit for receiving the amplified signal. . This design can effectively filter out interference signals and eliminate noise signals at the same time.

As shown in Figure 8, the A/D conversion module 24 includes a microcontroller control circuit 241, a JTAG port 242, a reference voltage circuit 243, an input voltage circuit 244 and a power supply circuit 245. Power supply circuit 245 is connected with input voltage circuit 244, single-chip microcomputer control circuit 241 respectively; JTAG port 242, reference voltage circuit 243 and input voltage circuit 244 are connected to single-chip microcomputer control circuit 241 together.

As shown in FIG. 9 , the pulse control module 25 includes power switch tubes VT1 - VT4 , diodes VD1 - VD4 and a motor. The emitters of the power switch tubes VT1 and VT3 are electrically connected to the motor, the collectors of the power switch tubes VT1 and VT3 are respectively electrically connected to the cathodes of the diodes VD1 and VD3; the anodes of the diodes VD1 and VD3 are electrically connected to the motor. The collectors of the power switch tubes VT2 and VT4 are electrically connected to the motor, the emitters of the power switch tubes VT2 and VT4 are respectively electrically connected to the anodes of the diodes VD2 and VD4, and the cathodes of the diodes VD2 and VD4 are electrically connected to the motor. The pulse control module 25 controls the motor to rotate clockwise or counterclockwise. VT1 and VT2, VT3 and VT4 are not allowed to be turned on at the same time. When the motor rotates clockwise, Ug3 is always negative and Ug4 is constant positive, then VT3 is cut off and VT4 is normally on. When the motor rotates counterclockwise, Ug3 is always positive and Ug4 is always negative, then VT3 is normally on and VT4 is off.

As shown in Figures 5 and 6, the human visual system can be viewed as a series of remarkably ingenious and precise optical and electrical devices. For example, during eye movements, there are measurable changes in position. When the human eyeball moves, the midpoint M of the line H connecting the two eyeball pupil trajectories will produce a position offset. By comparing it with the initially set M point position, a control signal for left or right movement can be obtained. Utilizing this principle, the eyeball movement and the computer system can be used for interactive operation, thereby realizing the reader's book-turning function. In the actual reading process, the human eyeball may have slight movement changes, but this change is not the reader's willingness to turn the book, so an error range N is set in this design, only the eyeball pupil trajectory is connected. Turn the book only when the offset distance of the midpoint of the line is greater than N/2.

As follows, the control method of the automatic page-turning reading chair based on eye-tracking includes the following steps:

1) Collect the image of the user's line of sight movement trajectory;

2) Recognize the image of the user's sight movement trajectory, and obtain the digital signal of eye movement;

3) Extract and analyze the information in the eye movement digital signal;

4) Convert the information extracted and analyzed in step 3) into an analog signal;

5) The analog signal in step 4) controls the rotation of the motor, so as to realize the flipping of books.

Specifically, the camera collects the image of the left and right movement track of the reader's eyeball; the image signal is sent to the eye movement detection module 22; the eye movement detection module 22 obtains the digital signal of eye movement, and the signal processing module 23 processes the digital eye movement signal related to the eye movement. Carry out extraction and analysis; Output to A/D conversion module 24 again, A/D conversion module 24 converts it into analog signal, and analog signal enters pulse control module 25; Analog signal controls motor with the form of pulse signal through pulse control module 25 turn.

The above-mentioned embodiments are only preferred embodiments of the present utility model, and are not intended to limit the implementation scope of the present utility model. That is, all equivalent changes and modifications made according to the content of the utility model are covered by the scope of protection required by the claims of the utility model.

Claims (8)

1. An automatic page-turning reading chair based on eye-tracking, characterized in that: comprising a seat (1) and a control device arranged on the seat (1); said seat (1) is provided with a curved arm ( 3), one end of the curved arm (3) is set on the seat (1), and the other end is connected with the vertical rod (4); the vertical rod (4) is provided with a bookshelf (5); the bookshelf (5) A camera (6) is provided at the top, pivotable left levers (7) and right levers (8) are respectively arranged on both sides of the bookshelf (6), and the middle part of the bookshelf (6) is provided with A ruler (9) that can pivot and translate; the signal input end of the control device is connected with the camera (6), and the signal output end is connected with the left and right levers (7, 8) respectively. 2. The automatic page-turning reading chair based on gaze tracking according to claim 1, characterized in that: the seat (1) is provided with a backrest (10), and the curved arm (3) is provided on the backrest (10) Above, the curved arm (3) is an elastic arc-shaped curved wall. 3. The eye-tracking-based automatic page-turning reading chair according to claim 1, characterized in that: the control device (2) is arranged at the bottom of the seat (1). 4. A control device for an automatic page-turning reading chair based on gaze tracking, characterized in that it includes an image acquisition module (21), an eye movement detection module (22), a signal processing module (23), and an A/D conversion module ( 24) and the pulse control module (25); the above modules are connected in sequence. 5. The control device of an automatic page-turning reading chair based on gaze tracking according to claim 4, characterized in that: the eye movement detection module (22) includes image difference, geometric transformation, compensation and correction, A capture card (221) for extracting eyeball movement trajectories, extracting trajectory lines and calculating the midpoint of the line of sight, and comparing with the initial position. 6. The control device of an automatic page-turning reading chair based on gaze tracking according to claim 4, characterized in that: the signal processing module (23) includes a signal amplification circuit and a filter circuit for receiving the amplified signal. 7. The control device of an automatic page-turning reading chair based on gaze tracking according to claim 4, characterized in that: the A/D conversion module (24) includes a single-chip microcomputer control circuit (241), a JTAG port (242), The reference voltage circuit (243), the input voltage circuit (244) and the power supply circuit (245), the power supply circuit (245) is connected to the input voltage circuit (244) and the single-chip microcomputer control circuit (241) respectively; the JTAG port ( 242), the reference voltage circuit (243) and the input voltage circuit (244) are connected to the single-chip microcomputer control circuit (241). 8. The control device of an automatic page-turning reading chair based on gaze tracking according to claim 4, characterized in that: the pulse control module (25) includes power switch tubes VT1-VT4, diodes VD1-VD4 and a motor; The emitters of the power switch tubes VT1 and VT3 are electrically connected to the motor, the collectors of the power switch tubes VT1 and VT3 are respectively electrically connected to the cathodes of the diodes VD1 and VD3; the anodes of the diodes VD1 and VD3 are electrically connected to the motor; The collectors of the power switch tubes VT2, VT4 are electrically connected to the motor, the emitters of the power switch tubes VT2, VT4 are respectively electrically connected to the anodes of the diodes VD2, VD4, and the cathodes of the diodes VD2, VD4 are electrically connected to the motor.

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