Blind intelligent voice chess set with contact sense detection function

Abstract

The utility model relates to a blind intelligent voice chess set with a contact sense detection function. The blind intelligent voice chess set comprises a chessboard, a capacitance digital conversion circuit, a processing module, a voice broadcast device and at least two chess pieces, the upper portion of each chess piece is provided with at least one proximity sensing electrode, the bottom of each chess piece is provided with a conductive mark, and the proximity sensing electrodes are coupled with the conductive marks. A recognition device used for recognizing the identity of a chess piece above the chess grid is arranged in each chess grid on the top face of the chessboard, at least one detection electrode is arranged in each chess grid, the detection electrodes form a capacitive sensor, and each chess grid is correspondingly provided with an alignment structure. The alignment structure is used for guiding marks at the bottoms of the chess pieces to fall into the induction electric field of the capacitive sensor when the chess pieces fall into the chess grids; the capacitance-to-digital conversion circuit is coupled with the detection electrode; and the processing module is respectively coupled with the capacitance digital conversion circuit, the voice broadcast device and each recognition device.

Description

Technical Field

[0001] The utility model relates to the field of intellectual development, in particular to a blind intelligent voice chess set with tactile detection function. Background Technique

[0002] Due to the loss of light response of the eyeballs, 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 can exercise the brains of visually impaired people, slow down the chronic cognitive decline caused by the lack of social activities, 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 piece recognition and voice broadcast, so as to help visually impaired people learn and play chess.

[0004] At present, most blind chess sets are based on RFID. RFID does not have the advantage of touch. It needs to pick up the piece to trigger the broadcast of the piece identity. Often, before the visually impaired person finds the piece they want to move next, they need to pick up and put down other pieces many times. In order to prevent the visually impaired person from touching and messing up or toppling the pieces, the bottom of the piece is designed with a stick to fit into the hole of the chess grid. There is also a problem of fumbling to embed into the hole when picking up and putting down, which is not convenient and friendly for the operation of visually impaired people, especially beginners, when looking for pieces. Content of the Utility Model

[0005] The purpose of the utility model is to improve the deficiencies in the prior art, so that when the finger of a visually impaired person approaches or touches a piece, a response can be triggered, avoiding the operation of picking up and placing the piece, and improving the efficiency of finding pieces.

[0006] To this end, a blind intelligent voice chess set with tactile detection function is provided, including a chessboard, a capacitance digital conversion circuit, a processing module, a voice broadcast device and at least two pieces; at least one proximity induction electrode is arranged on the upper part of each piece, and a conductive mark is arranged at the bottom of the piece, and the proximity induction electrode is coupled with the conductive mark; in each chess grid on the top surface of the chessboard, there is a recognition device for identifying the identity of the piece above the chess grid, and at least one detection electrode is arranged, and the detection electrodes form a capacitive sensor. Each chess grid is correspondingly provided with an alignment structure, and the alignment structure is used to guide the mark at the bottom of the piece into the induction electric field of the capacitive sensor when the piece lands on the chess grid; the capacitance digital conversion circuit is coupled to the detection electrode; the processing module is respectively coupled to the capacitance digital conversion circuit, the voice broadcast device and each recognition device.

[0007] Regarding the structure of the present utility model, when a human hand approaches, the human body capacitance is coupled to the chessboard grid through the proximity sensing electrode on the chess piece, and the chessboard grid is arranged with detection electrodes to form capacitance sensing. For a large number of chess pieces, only the proximity sensing electrode needs to be set to be coupled to the bottom identifier, which is easy to implement and has a low cost. The detection component is arranged on the chessboard, and the wiring is convenient. The proximity or contact of the human hand can be detected through capacitance. When a visually impaired person approaches or touches the chess piece, the response can be triggered to perform voice broadcast of the identity of the chess piece and / or the position of the chessboard grid. The visually impaired person can know the chess piece pointed by the finger without the need to pick up or place the chess piece, which is highly efficient and convenient for the operation of the visually impaired person.

[0008] As an improved solution, the proximity sensing electrode can be set as a conductor built into the upper part of the chess piece. For example, a metal rod is hidden inside the top of the chess piece, and the appearance of the chess piece is the same as the conventional one; or, the proximity sensing electrode is set as a conductive ring arranged around the circumference of the chess piece. For example, a metal ring is installed on the outer surface of the top of the chess piece to play the role of proximity detection and metal decoration; or, the proximity sensing electrode is set as a coating covering the circumference of the chess piece. For example, carbon powder is sprayed on the outer surface of the chess piece by powder spraying process to simply and low-costly form the proximity sensing electrode.

[0009] As another improved solution, the alignment structure is an interlocking component. The interlocking component at least includes a long rod extending downward from the bottom surface of the chess piece, and a hole corresponding to each chessboard grid position on the top surface of the chessboard for the long rod to be fitted and embedded, so as to prevent the chess piece from tipping over and getting messed up. Among them, the hole is preferably located at the center of the chessboard grid. Further, at least one detection electrode is arranged inside the hole, and the end of the long rod has an end identifier for detecting the induction electric field constructed by the detection electrodes in the hole, which can effectively identify whether the chess piece is inserted properly or whether the chess piece has tipped over. Preferably, the end identifier is a conductor and is reused as a conductive identifier to simplify the structure.

[0010] Further, the bottom surface of the chess piece has a conical structure, and the long rod extends out from the bottom of the cone. The top surface of the chessboard is provided with a groove that is in imitation of the conical structure and is interlocked with each chessboard grid position. The conical groove makes the flag-inserting operation of the visually impaired person more convenient, and at the same time is beneficial to improving the alignment accuracy. The conical groove design has better design advantages for chess such as chess. The chess pieces of chess have a certain height and are more likely to tip over. Through the conical groove design, the anti-tipping ability of the chess piece can be improved. For other flat chess pieces such as Chinese chess, the chess pieces are relatively not easy to tip over, and the conical groove design can be removed.

[0011] As another improvement scheme, the alignment structure is a magnetic attraction component. At this time, the chess grid does not need to be perforated, and magnetic attraction is used for fixation and alignment guidance. Due to the problem of alignment deviation in magnetic attraction, to make up for the detection impact caused by this defect, further, at least two detection electrodes are arranged in each chess grid, and the mutual capacitance electric field is constructed by the detection electrodes in the chess grid to detect the identification mark at the bottom of the chess piece; the distance between two adjacent detection electrodes is configured to be large enough to cover at least the alignment deviation of the magnetic attraction structure. For example, the thickness of the conductive mark is 1 mm, and the distance between two adjacent detection electrodes is configured to be about 2 mm.

[0012] In the present utility model, the identification device can adopt schemes such as RFID and electrical conduction to realize the identification of chess pieces. However, as another improvement scheme, it is preferably to realize the identification of chess pieces of the blind chess set based on capacitance technology, achieving the advantages of no need for contact and allowing the chess pieces to be placed in any direction, so that the visually impaired can operate conveniently. Specifically, the identification device includes zero, one or more graphic marks arranged at the bottom of each chess piece, and at least two detection electrodes arranged in each chess grid; the difference in dielectric constant between the graphic mark and the chess piece body is greater than 4 - 50 times, and the graphic marks 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 at least one of the graphic mark and the detection electrode is set as a ring, and the capacitive sensor formed by each detection electrode is also used for non-contact induction of the coding pattern. In this improvement scheme, the bottom of the chess piece is sprayed with carbon powder or fixed with a metal conductor as the graphic mark, forming 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. Cooperating with the capacitance digital conversion circuit (CDC) can achieve high-precision capacitance detection, and the implementation cost is low; by setting the structure that the graphic mark and the detection electrode are arranged outward from the center of the chess grid, and at least one of them is a ring design, it allows the visually impaired to place the chess piece at any angle of 360° or even rotate, which is easy for the visually impaired to operate.

[0013] Further, the detection electrode is a circular ring electrode, and each circular ring electrode in the chess grid is insulated from each other and concentrically arranged; two adjacent circular ring electrodes form a planar mutual capacitance electric field. 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 different planar mutual capacitance electric fields respectively. 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 constructed with each circular 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 different self-capacitance electric fields respectively. 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. The advantage of the self-capacitance is that the detection distance is far, but because it is a capacitance to the ground, manual cooperation is required. By taking advantage of the characteristic that there is human hand 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 circular ring mark, and each circular ring mark on the chess piece is spaced apart from each other and concentrically arranged, which can improve the capacitance output and further improve the detection accuracy. Furthermore, the conductive mark is also a circular ring, and the conductive circular ring at the bottom of the chess piece and each graphic mark are spaced apart from each other and concentrically arranged. Through multiple concentric circles, it is easy to achieve both the identification of the chess piece and the realization of proximity detection.

[0014] For the prompt of the chess grid position of traditional blind chess sets, corresponding to each row and column of chess grids, Braille is set on the edge of the chessboard for visually impaired people to touch and guide. The visually impaired person needs to, for example, feel along the row and then along the column, and finally determine the two-dimensional coordinates through XY. One chess-playing operation requires two rounds of coordinate exploration for picking up and putting down the chess piece, and the operation is laborious. To improve this situation, as another improvement scheme, at least two position measurement electrodes are arranged around the center of each chess grid on the top surface of the chessboard. Each position measurement electrode in the chess grid forms at least one mutual capacitance, and each position measurement electrode on the chessboard is insulated from each other; the capacitance digital conversion circuit is coupled to each position measurement electrode. By arranging at least two electrodes around the center of each chess grid and 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 can be achieved, and together with the voice broadcast for quick position prompt, the convenience and efficiency of the visually impaired person playing chess can be greatly improved.

[0015] During the traditional chess game for visually impaired players, it is necessary for someone else or a referee to help set up the chess pieces. As another improvement solution, the chessboard is provided with a chess piece storage area. The chess piece storage area has at least as many placement grids as 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 equipped with a capacitive sensor and a positioning structure identical to that of the chess grid, enabling the placement grid to have the same ability to identify chess pieces. When a visually impaired player starts setting 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, facilitating the visually impaired player to set up the chess pieces independently. Further, two chess piece storage areas can be provided, one on each side of the chessboard, preferably located on the central axis. After a player captures a piece, they can put it into the storage area on the right hand side, and when setting up the pieces, take the pieces from the storage area on the left hand side, or directly rotate the entire chessboard.

[0016] As another improvement solution, it also includes a timer coupled with a processing module to achieve timer voice announcements for reminders; alternatively, guiding Braille is respectively set along each row and each column of the chess grid on the chessboard to indicate the positions of the chess grids. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of a blind intelligent voice chess set with tactile detection function provided in this embodiment;

[0018] Figure 2 is a schematic diagram of the effect of one of the usage methods of the blind intelligent voice chess set provided in this embodiment;

[0019] Figure 3 is a schematic diagram of the spatial relationship between the long stick and the hole provided in this embodiment;

[0020] Figure 4 is a schematic diagram of the internal structure of the chess piece provided in this embodiment;

[0021] Figure 5 is a schematic diagram of forming a coating by spraying carbon powder on the outside of the chess piece provided in this embodiment;

[0022] Figure 6 is a schematic diagram of arranging multiple annular electrodes at the bottom of the chess piece provided in this embodiment;

[0023] Figure 7 is a schematic diagram of the pattern coding at the bottom of the chess piece provided in this embodiment;

[0024] Figure 8 is a schematic diagram of an optional blind intelligent voice chess set with tactile detection function provided in this embodiment.

[0025] Figure 9 is a schematic diagram of multiple circular electrodes in the chess grid provided in this embodiment. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0027] The purpose of this embodiment is to improve the deficiencies in the prior art, so that when a visually impaired person's finger approaches or touches a chess piece, a response can be triggered, avoiding the operation of picking up and placing the chess piece, and improving the efficiency of finding the chess piece.

[0028] Optionally, Figure 1 is a schematic diagram of a blind intelligent voice chess set provided in this embodiment, as Figure 1 shown, the blind intelligent voice chess set includes a plurality of chess pieces 10, a chessboard 20, 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 it, no chess piece is placed above the chess square 206 at this time.

[0029] The blind intelligent voice chess set provided in this embodiment further includes the following components ( Figure 1 not shown in): a capacitance digital conversion circuit 20, a processing module. See Figure 2 , 4 , 5. At least one proximity sensing electrode is provided on the upper part of each chess piece. The proximity sensing electrode is arranged as a coating 501 that wraps around the circumference of the chess piece. The coating 501 is located in the upper half of the chess piece and can also extend to the area 502 in the lower half. The outer surface of the chess piece is sprayed with carbon powder using a powder spraying process to simply and low-costly form the proximity sensing electrode. A conductive mark is provided at the bottom of the chess piece. The outermost ring electrode 101 at the bottom in Figure 6 can be used as the conductive mark. The proximity sensing electrode and the conductive mark can also be electrically connected through an internal wire 600. An identification device for identifying the identity of the chess piece above the chess square is provided in each chess square on the top surface of the chessboard 20. See Figure 9 . Four detection electrodes 401, 402, 403, and 404 are arranged in the chess square. The detection electrodes form a capacitive sensor. Each chess square is correspondingly provided with an alignment structure for guiding the mark 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 (CDC, that is, Capacitor digital conversion) is coupled to the detection electrodes; the processing module is respectively coupled to the capacitance digital conversion circuit, the voice broadcast device, and each identification device. When detecting in the form of self-capacitance, the electrode 401 can be used as the capacitive sensor to detect the approach of a human hand. The CDC inputs an excitation to the electrode 401 and receives the self-capacitance signal from above; when detecting in the form of mutual capacitance, the electrodes 401 and 402 are used as the capacitive sensor, and the approach of a human hand is detected by forming a mutual capacitance field. The CDC inputs an excitation to the electrode 402 and receives the mutual capacitance signal from 402.

[0030] The following is an illustration of one of the usage methods of the intelligent voice chess set for the blind: Figure 2 When the user's finger approaches the top of the chess piece, since a proximity induction electrode is provided at the top of the chess piece, the human body capacitance is coupled to the capacitance sensor on the chess grid through the proximity induction electrode on the chess piece. The capacitance sensor outputs a capacitance value with a large change, and at this time, based on the processing of the processing module, the recognition of the approach of the human hand is triggered.

[0031] In addition to covering the surface of the chess piece with a coating, the above proximity induction electrode can also be set as a metal body buried inside the upper part of the chess piece, or a metal ring surrounding the circumference of the upper part of the chess piece, both of which can achieve the purpose of coupling the human body capacitance.

[0032] 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 capacitance sensor when the chess piece is placed on the chess grid. The positioning structure is an inlay component.

[0033] Combined with Figure 3 , the inlay component at least includes a long rod 700 extending downward from the bottom surface of the chess piece, and a hole 800 provided at the corresponding position of each chess grid on the top surface of the chessboard for the long rod to be appropriately embedded, so as to prevent the chess piece from tipping over and getting messed up.

[0034] In an alternative embodiment, combined with Figure 6 、 Figure 9, in this embodiment, multiple annular electrodes are provided at the bottom of the chess piece. The outer annular electrode is used for detecting the approach of a human hand, and the inner annular electrode forms a graphic identifier. The capacitance sensor formed by the detection electrodes on the chessboard identifies the above graphic identifier to determine the identity type of the chess piece (such as rook, bishop, knight, pawn, etc.). For example, the detection electrodes 401, 402, 403, and 404 are circular ring electrodes, and each circular ring electrode is insulated from each other and concentrically arranged. Taking self-capacitance as an example, the capacitance digital conversion circuit inputs an excitation to each circular ring electrode and receives it from itself. When the chess piece is placed, it is guided by the alignment structure to be aligned. Each annular electrode at the bottom of the chess piece just aligns with each circular ring electrode on the chess grid, thereby respectively causing the self-capacitance change of each circular ring electrode to be output. Among them, electrode 401 is used to detect the approach of a human hand, and electrodes 402, 403, and 404 are used to detect the encoding of the graphic identifier. In another alternative solution, mutual capacitance can be used for detection. An adjacent two circular ring electrodes construct a planar mutual capacitance electric field. For example, a mutual capacitance is formed between circular ring electrodes 401 and 402. At this time, the capacitance digital conversion circuit inputs an excitation to electrode 401 and receives it from electrode 402. Similarly, a mutual capacitance is formed between circular ring electrodes 402 and 403, and a mutual capacitance is formed between circular ring electrodes 403 and 404. When the chess piece is placed, it is guided by the alignment structure to be aligned. Each annular electrode at the bottom of the chess piece falls between two adjacent circular ring electrodes, causing a change in the dielectric constant within the corresponding electric field space, and the output mutual capacitance value changes accordingly. Similarly, the encoding of the graphic identifier and the approach of a human hand can be detected.

[0035] When the user picks up the chess piece and places it on the chess grid, this embodiment can identify 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).

[0036] It should be noted that this embodiment can be targeted at blind users with visual impairments as well as ordinary users with normal vision. Through this embodiment, blind-versus-blind and blind-versus-sighted battles can be realized.

[0037] The above graphic identifier can be encoded based on different arrangements of the annular electrodes at the bottom of the chess piece. Different encoded graphic identifiers can be used to represent chess pieces of different identities. Combining Figure 7 , the part with an electrode can be recognized as 1, and the part without an electrode can be recognized as 0. Then Figure 7 the encoding on the left is: 1010, Figure 3 and the encoding on the right is 0110. The different encodings can refer to chess pieces of different identity types.

[0038] In an alternative embodiment, combining Figure 8, on the chessboard, there are also areas 201, 202 for placing different types of chess pieces and a timer module 203. For example, based on the game rules, after a chess piece is captured, a black chess piece is placed in area 201 and a white chess piece is placed in area 202.

[0039] 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. An intelligent voice chess set for the blind with a contact detection function, characterized in that: It includes a chessboard, a capacitance-to-digital conversion circuit, a processing module, a voice broadcast device and at least two chess pieces; At least one proximity sensing electrode is disposed on the upper portion of each chess piece, and a conductive mark is disposed on the bottom of each chess piece, and the proximity sensing electrode is coupled to the conductive mark; Each chess square on the top surface of the chessboard is provided with an identification device for identifying the identity of the chess piece on the chess square, and is arranged with at least one detection electrode, the detection electrode constitutes a capacitive sensor, and each chess square is correspondingly provided with a positioning structure, the positioning structure is used to guide the mark at the bottom of the chess piece to fall into the induction electric field of the capacitive sensor when the chess piece falls on the chess square; The capacitance-to-digital conversion circuit is coupled to the detection electrode; The processing modules are respectively coupled to the capacitance-to-digital conversion circuit, the voice broadcasting device and each recognition device.

2. The intelligent voice chess set for the blind according to claim 1, characterized in that: The proximity sensing electrode is a conductor built into the upper part of the chess piece; Alternatively, the proximity sensing electrode is a conductive ring arranged around the chess piece; Alternatively, the proximity sensing electrode is a coating covering the chess piece in a circumferential direction.

3. The intelligent voice chess set for the blind according to claim 1, characterized in that: The alignment structure is an embedding component, which at least includes a long stick extending downward from the bottom surface of the chess piece, and holes arranged on the top surface of the chessboard corresponding to each chess square position for the long stick to fit into.

4. The intelligent voice chess set for the blind according to claim 3, characterized in that: At least one detection electrode is built into the hole, and the end of the long stick has an end mark for detecting the induced electric field constructed by the detection electrode in the hole.

5. The intelligent voice chess set for the blind according to claim 4, characterized in that: The end mark is a conductor and is reused as the conductive mark.

6. The intelligent voice chess set for the blind according to claim 3, characterized in that: The bottom surface of the chess piece has a cone-shaped structure, and the long stick extends from the bottom of the cone; A groove which is inlaid with the conical structure is arranged at a position corresponding to each chess square on the top surface of the chessboard.

7. The intelligent voice chess set for the blind according to claim 1, characterized in that: The alignment structure is a magnetic attraction component.

8. The intelligent voice chess set for the blind according to claim 7, characterized in that: At least two detection electrodes are arranged in each chess square, and each of the detection electrodes in the chess square constructs a mutual capacitance electric field to detect the mark at the bottom of the chess piece; The distance between two adjacent detection electrodes is configured to be large enough to at least cover the alignment deviation of the magnetic attraction component.

9. The intelligent voice chess set for the blind according to claim 1, characterized in that: The identification device includes zero, one or more graphic marks arranged at the bottom of each chess piece, and at least two detection electrodes arranged in each chess square; The dielectric constant of the graphic mark and the chess piece body differs by more than 4-50 times, and the graphic marks on the chess piece are arranged from the center of the chess grid to the outside to form a coding pattern, and the coding patterns of different types of chess pieces are different; The detection electrodes in the chessboard are arranged outward from the center of the chessboard, at least one of the graphic mark and the detection electrode is set as a ring, and the capacitive sensor formed by the detection electrodes is also used for non-contact sensing of the coding pattern.

10. The intelligent voice chess set for the blind according to claim 9, characterized in that: The detection electrode is a circular electrode, and each of the circular electrodes in the chess square is insulated from each other and concentrically arranged; two adjacent circular electrodes construct a planar mutual capacitance electric field, and when the chess piece falls into the chess square, under the guidance of the alignment structure, each mark at the bottom of the chess piece falls into a different planar mutual capacitance electric field; or, each circular electrode constructs a self-capacitance electric field, and when the chess piece falls into the chess square, under the guidance of the alignment structure, each mark at the bottom of the chess piece falls into a different self-capacitance electric field.

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

12. The intelligent voice chess set for the blind according to claim 11, characterized in that: The conductive mark is a circular ring, and the conductive mark at the bottom of the chess piece and each of the graphic marks are spaced apart from each other and are concentrically arranged.

13. The intelligent voice chess set for the blind according to claim 1, characterized in that: At least two position measurement electrodes are arranged around the center of each chess square on the top surface of the chessboard, each of the position measurement electrodes in the chess square forms a capacitive sensor, and each of the position measurement electrodes on the chessboard is insulated from each other; The capacitance-to-digital conversion circuit is coupled to each position measurement electrode.

14. The intelligent voice chess set for the blind according to claim 1, characterized in that: The chessboard is provided with a chess piece storage area, the chess piece storage area has at least a number of placement grids corresponding to the number of chess pieces, and each placement grid is arranged with a capacitive sensor and alignment structure identical to the chess grid; Alternatively, it further comprises a timer coupled to the processing module; Alternatively, guiding Braille is provided on each row and column along the chessboard.

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