Blind intelligent voice chess set capable of broadcasting finger position

Abstract

The utility model relates to a blind intelligent voice chess set capable of broadcasting finger positions. The blind intelligent voice chess set comprises a chessboard, a capacitance digital conversion circuit, a processing module, a voice broadcasting device and at least two chess pieces. At least two position detection electrodes are arranged around the center of each chess grid on the top surface of the chessboard, the position detection electrodes in the chess grids form a capacitive sensor, and the position detection electrodes on the chessboard are mutually insulated; the capacitance digital conversion circuit is respectively coupled with each position detection electrode; and the processing module is respectively coupled with the capacitance digital conversion circuit and the voice broadcast device. The intelligent voice chess set for the blind can identify the chess grid positions of the fingers of a visually impaired person at high precision.

Description

Technical Field

[0001] The utility model relates to the field of intellectual development, in particular to a blind intelligent voice chess set capable of reporting the position of fingers. Background Art

[0002] Due to the loss of response of the eyeballs to light, the life activities of visually impaired people are greatly restricted. Most blind chess sets are of public welfare nature. Because of their intellectual development characteristics, they play a role in exercising the brains of visually impaired people, can slow down the chronic cognitive decline caused by the lack of social activities of visually impaired people, provide emotional value, contribute to the common progress of society, and reflect social care.

[0003] Blind chess sets generally achieve acoustic interaction with visually impaired people based on chess piece recognition and voice broadcast to help visually impaired people learn and play chess. For chess piece recognition, most currently use RFID to achieve the identification of chess piece identities by means of built-in chips in each chess piece, which requires wireless charging technology. For the prompt of the position of the chess grid, for each row and column of chess grids, Braille is set at the edge of the chessboard for visually impaired people to touch and guide. As shown in CN209490459U, it requires visually impaired people to feel along the row and then along the column, and finally determine the two-dimensional coordinates through XY. One chess piece placement operation requires two rounds of coordinate exploration for taking and placing the chess piece, which is very laborious and at the same time results in extremely low chess-playing efficiency for visually impaired people. Summary of the Utility Model

[0004] The utility model needs to accurately identify the position of the chess grid where the finger of a visually impaired person is located.

[0005] To this end, a blind intelligent voice chess set capable of reporting the position of fingers is provided, which includes a chessboard, a capacitance digital conversion circuit (CDC), a processing module, a voice broadcast device, and at least two chess pieces; at least two position detection electrodes are arranged around the center of each chess grid on the top surface of the chessboard, and each position detection electrode in the chess grid forms a capacitance sensor, and the position detection electrodes on the chessboard are insulated from each other; the capacitance digital conversion circuit is respectively coupled to each position detection electrode; the processing module is respectively coupled to the capacitance digital conversion circuit and the voice broadcast device.

[0006] The advantage of the structure of the utility model is that the electrodes are easy to arrange, the sensing structure is simple to implement, and the cost is low; by arranging at least two electrodes around the center of each chess grid, referring to the method of the ratio of the nearest adjacent electrode to the farthest electrode shown in CN111585560B, non-contact high-spatial-resolution recognition of the finger position is achieved, and then rapid position prompt is combined with voice broadcast, greatly improving the convenience and efficiency of visually impaired people playing chess.

[0007] As an improved solution, to achieve structural simplification and cost reduction, a first position detection electrode and a second position detection electrode are provided for each chess grid, and the first position detection electrode and the second position detection electrode are respectively arranged on both sides of the center of the chess grid. Further, the first position detection electrode and the second position detection electrode are symmetrically arranged along the center of the chess grid, which can further improve the position detection accuracy. And / or, more preferably, the arrangement directions of the position detection electrodes of two adjacent chess grids are set differently. By setting the difference in the direction of the electric field lines, it is possible to better distinguish the extreme case where the finger is exactly above the boundary line of the chess grid, achieving algorithm simplification while achieving higher position recognition accuracy.

[0008] As another improved solution, a first position detection electrode, a second position detection electrode, and a third position detection electrode are provided for each chess grid, and the first position detection electrode, the second position detection electrode, and the third position detection electrode are arranged circumferentially around the center of the chess grid. Compared with the two-electrode solution, the disadvantage of the three-electrode design is that it requires more CDC channels, and the advantage is that the recognition accuracy can be further improved.

[0009] As another improved solution, a first position detection electrode, a second position detection electrode, a third position detection electrode, and a fourth position detection electrode are provided for each chess grid, and the first position detection electrode, the second position detection electrode, the third position detection electrode, and the fourth position detection electrode are respectively arranged around the center of the chess grid to further improve the position accuracy. Most preferably, each position detection electrode on each chess grid is symmetrically arranged along the center, constructing a perpendicular setting of the electric field line direction within the chess grid to achieve the optimal recognition effect; and / or, the position detection electrodes on the left and right sides of the boundary line of the chess grid are symmetrically arranged along the boundary line, using the capacitance difference between the electrodes of two adjacent chess grids to further improve the spatial resolution ability.

[0010] In the present utility model, an identification device for identifying the identity of the chess piece above each chess grid on the top surface of the chessboard is provided, and the processing module is respectively coupled to each identification device. The identification device can adopt solutions such as RFID, electrical conduction, etc. to realize the identification of chess pieces. However, as another improvement solution, it is preferably to realize the identification of chess pieces for blind chess sets based on capacitance technology, achieving the advantages of no need for contact and allowing the chess pieces to be placed in any direction, enabling visually impaired persons to operate conveniently. Specifically, the identification device includes zero, one or more graphic identifiers arranged at the bottom of each chess piece, and at least two detection electrodes arranged in each chess grid; the dielectric constant difference between the graphic identifier and the chess piece body is greater than 4 - 50 times, and the graphic identifiers on the chess piece are arranged outward from the center of the chess grid to form a coding pattern, and the coding patterns of different types of chess pieces are different; the detection electrodes in the chess grid are arranged outward from the center of the chess grid and constitute a capacitive sensor for non-contact induction of the coding pattern. At least one of the graphic identifier and the detection electrode is set as a ring, and each chess grid is correspondingly provided with an alignment structure for guiding the identifier at the bottom of the chess piece into the induction electric field of the capacitive sensor when the chess piece lands on the chess grid; the capacitance digital conversion circuit is respectively coupled to each detection electrode. In this improved solution, the bottom of the chess piece is used as a graphic identifier by spraying carbon powder or fixing a metal conductor, resulting in a large difference in dielectric constant from the material of the chess piece (commonly wood or stone due to historical and cultural reasons). The electrode has easy layout, which is convenient for the setting of the chess grid. Combined with the capacitance digital conversion circuit (CDC), high-precision capacitance detection can be achieved, and the implementation cost is low; by setting the structure that the graphic identifier and the detection electrode are arranged outward from the center of the chess grid, and at least one of them is designed as a ring, it allows visually impaired persons to place the chess piece at any angle of 360° or even rotate it, which is easy for visually impaired persons to operate.

[0011] In the structure of the present utility model, at least two position detection electrodes arranged around the center of each chess grid can identify the position by constructing mutual capacitance and / or self-capacitance. When there is a chess piece on the chess grid of the finger, in addition to the voice broadcast of the position, the identity of the chess piece can be further broadcast.

[0012] Further, the detection electrodes are set as ring electrodes, and the ring electrodes in each chess grid are insulated from each other and concentrically arranged; two adjacent ring electrodes form a planar mutual capacitance electric field. When a chess piece lands on the chess grid, under the guiding action of the alignment structure, each mark at the bottom of the chess piece falls into a different planar mutual capacitance electric field. In other words, when the chess piece lands on the chess grid, the graphic mark falls into the gap between two adjacent detection electrodes, and detection is achieved through the mutual capacitance method. The mutual capacitance method is relatively insensitive to environmental factors such as temperature and humidity compared to the self-capacitance method, which is beneficial to improving the detection accuracy; alternatively, a self-capacitance electric field is formed with each ring electrode. When the chess piece lands on the chess grid, under the guiding action of the alignment structure, each mark at the bottom of the chess piece falls into a different self-capacitance electric field. In other words, when the chess piece lands on the chess grid, each graphic mark aligns with a detection electrode, and detection is achieved through the self-capacitance method. The advantage of the self-capacitance method is that the detection distance is far, but because it is a ground capacitance, it requires manual cooperation. By utilizing the characteristic that there is manual contact when picking up or putting down the chess piece, the detection purpose can also be achieved. On this basis, further, the graphic mark is a ring mark, and the ring marks on the chess piece are spaced apart from each other and concentrically arranged, which can improve the capacitance output and further enhance the detection accuracy.

[0013] As an improved solution, strip electrodes of a coupling capacitance digital conversion circuit are respectively arranged on two sides of the chessboard close to the chess player. When a human arm crosses the strip electrodes above the chessboard, it causes a capacitance change. The direction of the human hand can be distinguished through the strip electrodes, and then it can be determined which chess player the finger belongs to, and the effective finger is selected for position reporting. On some chessboards with voice teaching functions (such as prompting the available moving positions of the chess pieces), in combination with the strip electrodes, the corresponding chess pieces are selected to prompt the next available moving positions.

[0014] During the traditional chess game for visually impaired people, it is necessary for someone else or a referee to help set up the chess pieces. As another improved solution, the chessboard is provided with a chess piece storage area. The chess piece storage area has at least placement grids corresponding to the number of chess pieces. The placement grids are used to place the captured chess pieces during the game or to store the chess pieces when not playing. Each placement grid is provided with a capacitive sensor and an alignment structure identical to that of the chess grid, so that the placement grid has the same ability to identify chess pieces. When the visually impaired person starts to set up the chess pieces for the next game, the identity of the chess piece is prompted when picking up the chess piece from the storage area, which is convenient for the visually impaired person to set up the chess pieces alone. Further, two chess piece storage areas can be set on the left and right sides of the chessboard respectively, and the preferred position is on the central axis. After the chess player captures a piece, it can be placed in the right-hand storage area, and when setting up the pieces, the chess piece is taken out from the left-hand storage area, or the entire chessboard can be directly rotated.

[0015] As another improved solution, it further includes a timer with a coupling processing module to achieve timer broadcast reminder; or, guiding Braille is respectively arranged along each row and each column of the chess grid on the chessboard to indicate the position of the chess grid. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of a blind intelligent voice chess set capable of reporting the finger position provided in this embodiment;

[0017] Figure 2 It is a schematic diagram of the effect of the intelligent chess set detecting the user's finger in this embodiment;

[0018] Figure 3 It is a schematic diagram of the distribution of two position detection electrodes in the chess grid;

[0019] Figure 4 It is a schematic diagram of the structure in which two position detection electrodes in the chess grid are symmetrically arranged along the center of the chess grid;

[0020] Figure 5 It shows different arrangement ways of the position detection electrodes on two adjacent chess grids;

[0021] Figure 6 It is a schematic diagram of the distribution of three position detection electrodes in the chess grid;

[0022] Figure 7 It is a schematic diagram of the distribution of four position detection electrodes in the chess grid;

[0023] Figure 8 It shows that the four position detection electrodes are symmetrically arranged in pairs along the center;

[0024] Figure 9 It shows a form in which the position detection electrodes are symmetrically arranged along the boundary line between two adjacent chess grids;

[0025] Figure 10 It shows another form in which the position detection electrodes are symmetrically arranged along the boundary line between two adjacent chess grids;

[0026] Figure 11 It is a schematic diagram of a ring electrode arranged at the bottom of the chess piece provided in this embodiment;

[0027] Figure 12 It is a schematic diagram of encoding the bottom of the chess piece provided in this embodiment;

[0028] Figure 13 It shows the inlay of the lower conical shape of the chess piece and the chess grid;

[0029] Figure 14 It is a schematic diagram of a ring electrode arranged in the groove of the chess grid provided in this embodiment. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] This embodiment provides a blind intelligent voice chess set capable of announcing the finger position. The above chess set can also be called a board game, which is a device composed of at least chess pieces, a chessboard, etc. In this solution, the chess pieces can be black and white chess pieces, chess pieces with words, symbols, patterns, etc., such as Go, Chinese chess, international chess, etc. The chessboard can be a chessboard with any number of rows and columns and patterns. The chessboard is matched with the chess pieces during use. When the user uses it, the chess pieces can be placed on or taken out of the chessboard according to different game rules. It should be noted that the users targeted by this solution can be ordinary users (users with normal vision), or other users with visual impairments. One of the technical purposes of this solution is to prompt by detecting the position of the user's finger and then playing it by voice when the user uses the chess set, so as to enhance the user experience. Through this solution, blind people can play chess with blind people, and blind people can also play chess with ordinary people.

[0032] Optionally, Figure 1 is a schematic diagram of an intelligent international chess provided by this embodiment, as Figure 1 shown, the intelligent international chess includes a plurality of chess pieces 10, a chessboard 20, a white piece eaten placement area 201 and a black piece eaten placement area 202 are provided on the chessboard 20, a timer 203, a voice input device 204, a voice broadcast device 205. Figure 1 shows a plurality of chess squares included in the top surface of the chessboard 20, and the chess square 206 is one of them. In Figure 1 , no chess piece is placed above the chess square 206 at this time.

[0033] Optionally, the intelligent international chess further includes the following components ( Figure 1 not shown in the figure): two position detection electrodes arranged in each chess square, a capacitance digital conversion circuit (CDC, i.e., Capacitor digital conversion), a processing module (which can be a microprocessor with data analysis and processing capabilities), and the capacitance digital conversion circuit is respectively coupled to each position detection electrode; the processing module is respectively coupled to the capacitance digital conversion circuit and the voice broadcast device (which can be a speaker).

[0034] The following combines Figure 2 , and explains the principle of the intelligent international chess in this embodiment for detecting the position of the user's finger as follows:

[0035] As Figure 2 shown, when the user's finger approaches or touches the chess square, through the capacitance sensor formed by the two position detection electrodes, the capacitance digital conversion circuit, and the processing module in this solution, the position of the user's finger in the chessboard can be determined by capacitance detection (such as several rows and several columns, or the specific area name), and then a reminder is made through the voice broadcast device.

[0036] In an alternative embodiment, a display module (such as an LED display) may also be provided on the chessboard of chess. After determining the specific position of the user's finger, ordinary users can be reminded in the form of text. This solution can also prompt the user in the form of voice broadcast + text reminder.

[0037] In an alternative embodiment, a vibration device, LED, etc. may also be provided on the chessboard of chess, and information can be prompted to the user through various methods such as vibration and flashing in a linked manner.

[0038] In an alternative embodiment, as Figure 3 shown, two position detection electrodes are provided in a single chess square 50 on the chessboard, a first position detection electrode 501 and a second position detection electrode 502. Combining Figure 3 , the first position detection electrode 501 and the second position detection electrode 502 are respectively arranged on both sides of the center O of the chess square, that is, the connection line of the two position detection electrodes passes through the center O of the chess square. It should be noted that the first position detection electrode 501 and the second position detection electrode 502 form a capacitive electric field line, so as to detect whether the user's finger approaches the chess square.

[0039] In an alternative embodiment, combining Figure 4 , the first position detection electrode 501 and the second position detection electrode 502 are symmetrically arranged along the center of the chess square, that is, the midpoint of the connection line of the first position detection electrode 501 and the second position detection electrode 502 is the center O of the chess square. It should be noted that different layout methods of the position detection electrodes result in different electric field lines formed by the position detection electrodes.

[0040] In an alternative embodiment, combining Figure 5 , the chess square 50 and the chess square 60 are two adjacent chess squares on the chessboard, and the arrangement methods of the position detection electrodes on the two chess squares are different.

[0041] In an alternative embodiment, combining Figure 6 , a single chessboard 50 includes a first position detection electrode 501, a second position detection electrode 502, and a third position detection electrode 503. The three position detection electrodes are arranged circumferentially around the center O of the chess square. It should be noted that in this solution, different numbers of position detection electrodes provided in the chess square and different electrode layout methods result in different electric field lines.

[0042] In an alternative embodiment, combining Figure 7, a single chess grid 50 includes a first position detection electrode 501, a second position detection electrode 502, a third position detection electrode 503, and a fourth position detection electrode 504. The four position detection electrodes are respectively arranged around the center of the chess grid. It should be noted that the above-mentioned "around" can be any area of a circle centered on the center of the chess grid where multiple position detection electrodes are distributed.

[0043] In an optional embodiment, combined with Figure 8 , a single chessboard 50 includes a first position detection electrode 501, a second position detection electrode 502, a third position detection electrode 503, and a fourth position detection electrode 504. The four position detection electrodes are respectively arranged around the center of the chess grid. Among them, the first position detection electrode 501 and the third position detection electrode 503 are symmetrically arranged along the center O, and the second position detection electrode 502 and the fourth position detection electrode 504 are symmetrically arranged along the center O.

[0044] In an optional embodiment, combined with Figure 9 , the chess grid 50 and the chess grid 60 are two adjacent chess grids on the chessboard. The chess grid 50 and the chess grid 60 respectively include 4 position detection electrodes. All the electrodes in the chess grid 50 and all the electrodes in the chess grid 60 are symmetrically arranged along the boundary line L of the two adjacent chess grids.

[0045] In an optional embodiment, combined with Figure 10 , the chessboard includes multiple chess grids. The chess grid 500 is one of the multiple chess grids. The chess grid 500 includes four position detection electrodes: position detection electrode D1, position detection electrode D2, position detection electrode D3, and position detection electrode D4. The adjacent chess grids around the chess grid 500 at least include position detection electrodes D5, D6, D7, and D8 ( Figure 10 not all the position detection electrodes in the adjacent chess grids around the chess grid 500 are fully shown in ). The chess grid 500 also includes a groove A1, and a ring electrode is arranged in the groove A1. The position detection electrodes around the groove A1 are used to identify the specific position of the finger, and the ring electrode arranged inside the groove A1 is used to detect whether the finger is close to the chess piece or to determine the identity type of the chess piece based on recognizing the pattern at the bottom of the chess piece.

[0046] In an optional embodiment, combined with Figure 11 , in this embodiment, multiple ring electrodes 101 are arranged at the bottom of the chess piece as graphic identifiers. The capacitance sensor formed by the detection electrodes on the chessboard recognizes the above-mentioned graphic identifiers to determine the identity type of the chess piece (such as rook, bishop, knight, pawn, etc.). That is, when the user picks up the chess piece and places it on the chess grid, this embodiment can recognize the identity type of the chess piece based on the non-contact capacitance induction method, and then remind the user through a voice broadcast device (such as a speaker).

[0047] The above graphic identifier can be encoded based on different ways of the annular electrode 101 at the bottom of the chess piece. After different encoded graphic identifiers are recognized, they can be used to represent chess pieces with different identities. Combining Figure 12 , the part with the electrode can be recognized as 1, and the part without the electrode can be recognized as 0. Then Figure 12 the encoding on the left is: 1010, Figure 12 the encoding on the right is 0110. The different encodings can refer to chess pieces of different identity types.

[0048] In an alternative embodiment, a positioning structure is correspondingly provided for each chess grid. The positioning structure is used to guide the identifier at the bottom of the chess piece into the induction electric field of the capacitive sensor when the chess piece lands on the chess grid. As Figure 13 shown, in this solution, the lower part of the chess piece can be set in a conical shape, and the chess grid is set as a conical accommodation cavity adapted to the conical shape, which is convenient for guiding the identifier at the bottom of the chess piece to quickly fall into the induction electric field of the capacitive sensor when the chess piece lands on the chess grid.

[0049] In an alternative embodiment, a magnetic attraction device can be provided in the positioning structure to align the chess piece and the chess grid by magnetic attraction.

[0050] In an alternative embodiment, combining Figure 14 , the multiple annular electrodes provided in the groove of the chess grid include detection electrodes 401, 402, 403, 404. The detection electrodes 401, 402, 403, 404 are circular ring electrodes, and each circular ring electrode is insulated from each other and concentrically arranged. In an alternative solution, a planar mutual capacitance electric field can be constructed between two adjacent circular ring electrodes. For example, a mutual capacitance is formed between the circular ring electrodes 401 and 402. At this time, the capacitance digital conversion circuit inputs an excitation to the electrode 401 and receives it from the electrode 402. Similarly, a mutual capacitance is formed between the circular ring electrodes 402 and 403, and a mutual capacitance is formed between the circular ring electrodes 403 and 404; in another alternative solution, a self-capacitance electric field is constructed with each circular ring electrode 401, 402, 403, 404. At this time, the capacitance digital conversion circuit inputs an excitation to each circular ring electrode and receives it from itself.

[0051] In an alternative embodiment, when two adjacent ring electrodes are constructed to form a mutual capacitance electric field, the placement of the chess piece is guided and aligned by the alignment structure. Each annular electrode at the bottom of the chess piece falls between two corresponding adjacent ring electrodes, causing a change in the dielectric constant within the corresponding electric field space, thereby changing the output mutual capacitance value to achieve the above-mentioned identification of 0 or 1. By encoding the outputs of each mutual capacitance electric field, the type of the chess piece can be known; when the ring electrodes are constructed to form a self-capacitance electric field, the placement of the chess piece is guided and aligned by the alignment structure. Each annular electrode at the bottom of the chess piece exactly aligns with each ring electrode on the chessboard, respectively causing a change in the self-capacitance output of each ring electrode. By encoding the self-capacitance output, the type of the chess piece can be known.

[0052] The above detection electrodes can use dot electrodes to replace the ring electrode arrangement, and the dot electrodes are arranged outward from the center of the chessboard.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A blind intelligent voice chess set capable of announcing the finger position, characterized in that: It includes a chessboard, a capacitance digital conversion circuit, a processing module, a voice announcement device, and at least two chess pieces; Each chess square on the top surface of the chessboard is provided with at least two position detection electrodes around its center. Each of the position detection electrodes within the chess square forms a capacitance sensor, and the position detection electrodes on the chessboard are insulated from each other; The capacitance digital conversion circuit is respectively coupled to each position detection electrode; The processing module is respectively coupled to the capacitance digital conversion circuit and the voice announcement device.

2. The blind intelligent voice chess set according to claim 1, characterized in that: Each chess square is provided with a first position detection electrode and a second position detection electrode, and the first position detection electrode and the second position detection electrode are respectively arranged on both sides of the center of the chess square.

3. The blind intelligent voice chess set according to claim 2, characterized in that: The first position detection electrode and the second position detection electrode are symmetrically arranged along the center of the chess square; And / or, the arrangement directions of the position detection electrodes of two adjacent chess squares are different.

4. The blind intelligent voice chess set according to claim 1, characterized in that: Each chess square is provided with a first position detection electrode, a second position detection electrode, and a third position detection electrode, and the first position detection electrode, the second position detection electrode, and the third position detection electrode are arranged in a circumferential direction around the center of the chess square.

5. The blind intelligent voice chess set according to claim 1, characterized in that: Each chess square is provided with a first position detection electrode, a second position detection electrode, a third position detection electrode, and a fourth position detection electrode, and the first position detection electrode, the second position detection electrode, the third position detection electrode, and the fourth position detection electrode are respectively arranged around the center of the chess square.

6. The blind intelligent voice chess set according to claim 5, characterized in that: Each of the position detection electrodes on each chess square is symmetrically arranged along the center; And / or, the position detection electrodes on the left and right sides of the boundary line of the chess square are symmetrically arranged along the boundary line.

7. The blind intelligent voice chess set according to claim 1, characterized in that: Each chess square on the top surface of the chessboard is provided with an identification device for identifying the identity of the chess piece above the chess square, and the processing module is respectively coupled to each identification device.

8. The blind intelligent voice chess set according to claim 7, characterized in that: The identification device includes zero, one or more graphic identifiers arranged at the bottom of each chess piece, and at least two detection electrodes arranged in each chess square; The dielectric constant difference between the graphic identifier and the chess piece body is greater than 4 times. The graphic identifiers on the chess piece are arranged outward from the center of the chess square to form a coding pattern, and the coding patterns of different types of chess pieces are different; Each of the detection electrodes in the chess square is arranged outward from the center of the chess square and constitutes a capacitive sensor for non-contact sensing of the coding pattern. At least one of the graphic identifier and the detection electrode is set as a ring. Each chess square is provided with a positioning structure, and the positioning structure is used to guide the identifier at the bottom of the chess piece into the induction electric field of the capacitive sensor when the chess piece lands on the chess square; The capacitance digital conversion circuit is respectively coupled to each of the detection electrodes.

9. The blind intelligent voice chess set according to claim 8, characterized in that: The detection electrodes are circular ring electrodes, and each of the circular ring electrodes in the chess grid is insulated from each other and concentrically arranged; a planar mutual capacitance electric field is constructed between two adjacent circular ring electrodes, and when the chess piece lands on the chess grid, under the guiding action of the alignment structure, each identifier at the bottom of the chess piece falls into different planar mutual capacitance electric fields respectively; alternatively, a self-capacitance electric field is constructed with each circular ring electrode, and when the chess piece lands on the chess grid, under the guiding action of the alignment structure, each identifier at the bottom of the chess piece falls into different self-capacitance electric fields respectively.

10. The blind intelligent voice chess set according to claim 9, characterized in that: The graphic identifiers are circular ring identifiers, and each of the circular ring identifiers on the chess piece is spaced apart from each other and concentrically arranged.

11. The blind intelligent voice chess set according to claim 1, characterized in that: Strip electrodes for coupling the capacitance digital conversion circuit are respectively arranged on both sides of the chessboard close to the chess player.

12. The blind intelligent voice chess set according to claim 1, characterized in that: The chessboard is provided with a chess piece storage area, and the chess piece storage area has at least placement grids corresponding to the number of the chess pieces, and each placement grid is provided with a capacitive sensor and an alignment structure identical to those of the chess grid; alternatively, it further includes a timer coupled to the processing module; alternatively, braille guides are respectively arranged along each row and each column of the chess grid on the chessboard.

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