Blind intelligent voice chess set with chess piece recognition capability

Abstract

The utility model relates to a blind intelligent voice chess set with chess piece recognition capability. The blind intelligent voice chess set comprises a chessboard, a capacitance digital conversion circuit, a processing module, a voice broadcast device and chess pieces, graphic marks are arranged at the bottoms of the chess pieces, the graphic marks on the chess pieces are arranged outwards from the centers of chess grids to form coding patterns, and the coding patterns of different types of chess pieces are different; at least two detection electrodes are arranged in each chess lattice of the chessboard, the detection electrodes in the chess lattices are arranged outwards from the centers of the chess lattices and form a capacitive sensor used for sensing coding patterns in a non-contact mode, at least one of the graphic marks and the detection electrodes is arranged to be a circular ring, and each chess lattice 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 respectively coupled with each detection electrode; and the processing module is respectively coupled with the capacitance digital conversion circuit and the voice broadcast 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 the ability to identify chess pieces. Background Art

[0002] Due to the loss of the eyeball's response 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 brain for visually impaired people, can 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 chess piece recognition combined with voice broadcast to help visually impaired people learn and play chess. The core of which is mainly the chess piece recognition technology. Currently, most of them are based on RFID, requiring each chess piece to be embedded with a chip, and at the same time, based on wireless charging technology to provide energy for the chess piece chip. The manufacturing process is complex and the overall cost is high.

[0004] CN100464810C proposes a blind intelligent voice chess. A circular conductor is arranged at the bottom of the chess piece to achieve electrical conduction with the contact point on the chess grid for identification. The electrical conduction scheme requires the circular conductor to be pressed onto the contact point or probe when the chess piece is placed, with high required alignment accuracy, posing relatively high requirements for the operation of visually impaired people.

[0005] CN116459504AC proposes a chess intellectual toy. A coding pattern is arranged on the matrix or the chess piece, and detection electrodes are arranged on the chess grid of the chessboard to achieve non-contact capacitive identification. The main service objects of the chess intellectual toy of CN116459504AC are normal people or children with unimpaired vision. Rectangular electrodes are arranged on the chess grid, and it is required that the matrix or the chess piece be inserted in a specific orientation, which also poses a challenge to the operation of visually impaired people. Content of the Utility Model

[0006] The utility model realizes the identification of chess pieces of a 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, enabling visually impaired people to operate conveniently.

[0007] To this end, a blind intelligent voice chess set with the ability to recognize chess pieces is provided, including a chessboard, a capacitance digital conversion circuit, a processing module, a voice broadcast device, and at least two chess pieces; the bottom of each chess piece is provided with zero, one, or more graphic identifiers, and the dielectric constant difference between the graphic identifier and the chess piece body is greater than 4 to 50 times. 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; at least two detection electrodes are arranged in each chess grid of the chessboard, and 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, and the alignment 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; the capacitance digital conversion circuit is respectively coupled to each detection electrode; the processing module is respectively coupled to the capacitance digital conversion circuit and the voice broadcast device.

[0008] The advantages of the structure of the present utility model are as follows:

[0009] (1) Compared with the RFID technology, the bottom of the chess piece forms a large dielectric constant difference with the chess piece material (commonly wood or stone due to historical and cultural reasons) by spraying carbon powder or fixing a metal conductor as a graphic identifier. The graphic identifier does not require energy charging, and the electrodes are easy to arrange, which is convenient for the chess grid setting. Combined with the capacitance digital conversion circuit (CDC), high-precision capacitance detection can be achieved, and the implementation cost is low;

[0010] (2) Compared with the electrical conduction technology, the capacitive detection does not require physical contact and is easy to cooperate with the inlaid design at the bottom of the chess piece, which is convenient for visually impaired people to operate;

[0011] (3) Compared with the capacitive detection of rectangular electrodes, 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 people to place the chess piece at any angle of 360° or even rotate it, which is easy for visually impaired people to operate.

[0012] As an improved solution, the detection electrode is a circular ring electrode, and each circular ring electrode in the checkerboard is insulated from each other and arranged concentrically; two adjacent circular ring electrodes construct a planar mutual capacitance electric field. When the chess piece lands on the checkerboard, 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 checkerboard, 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 checkerboard, 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 checkerboard, 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 fact that there is human hand contact when picking up or putting down the chess piece, the detection purpose can also be achieved.

[0013] Alternatively, the detection electrode is a point electrode, and each point electrode in the checkerboard is arranged outward from the center of the checkerboard. Similarly, two adjacent point electrodes construct a planar mutual capacitance electric field. When the chess piece lands on the checkerboard, 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; or a self-capacitance electric field is constructed with each point electrode. When the chess piece lands on the checkerboard, 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. Compared with the point electrode, the area of the circular ring electrode increases, the capacitance detection accuracy can be further improved, and it is also beneficial to the good detection of arbitrary placement at 360°.

[0014] On this basis, further, the graphic mark is a circular ring mark, and each circular ring mark on the chess piece is spaced apart and arranged concentrically, which can improve the capacitance output and further improve the detection accuracy. For the scheme where both the graphic mark and the detection electrode are circular rings, the double circular ring design can achieve the best detection effect.

[0015] As another improvement, 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 holes provided at corresponding positions on the top surface of the chessboard for the long rod to fit and embed, so as to prevent the chess pieces from tipping over and getting messed up. Among them, the holes are preferably located at the center of the chess squares. Further, at least one detection electrode is disposed inside the holes, and the end of the long rod has an end identifier for detecting the induction electric field constructed by the detection electrodes in the holes, which can effectively identify whether the chess piece is inserted properly or whether the chess piece has tipped over. At the same time, the end identifier can be used for coding to reduce the layout pressure of the graphic identifier. Further, the bottom surface of the chess piece has a conical structure, the long rod extends from the bottom of the cone, and a groove that is shaped to fit the conical structure is provided at the corresponding position of each chess square on the top surface of the chessboard. The conical groove makes it easier for visually impaired people to insert the flag, and at the same time helps to improve the alignment accuracy. The conical groove design has good design advantages for chess. Chess pieces have a certain height and are more likely to tip over. Through the conical groove design, the anti-tipping ability of the chess pieces can be improved. For other chess pieces such as Chinese chess with flat shapes, the chess pieces are relatively not easy to tip over, and the conical groove design can be removed.

[0016] Alternatively, the alignment structure is a magnetic attraction component. At this time, the chess squares do not need to be drilled, 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 influence caused by this defect, further, the detection electrodes in the chess squares construct a mutual capacitance electric field to detect the identifier at the bottom of the chess piece, and the distance between adjacent two detection electrodes is configured to be large enough to at least cover the alignment deviation of the magnetic attraction structure. For example, the thickness of the graphic identifier is 1 mm, and the distance between adjacent two detection electrodes is configured to be about 2 mm.

[0017] In the present utility model, the shape of the chess piece does not need to be changed, and the orthographic projection of the bottom is circular.

[0018] The existing chess piece recognition technology does not have the tactile advantage. It needs to pick up the chess piece to trigger the announcement of the chess piece identity, which often leads to visually impaired people having to pick up and put down other chess pieces many times before finding the next chess piece they want to move. And for the blind chess set, to prevent the visually impaired from disturbing or toppling the chess pieces by touching, the bottom of the chess piece is designed with a stick that fits into the hole of the chess grid. There is still a problem of fumbling to embed the hole when picking up and putting down, which is not convenient and friendly enough for the operation of visually impaired people, especially beginners, when looking for chess pieces. To facilitate the visually impaired to find chess pieces and avoid the need for multiple pick-ups and put-downs, as another improvement scheme, at least one proximity sensing electrode is arranged on the upper part of the chess piece, and a conductive mark is arranged at the bottom of the chess piece. The proximity sensing electrode is coupled with the conductive mark, and the electrical connection between the two can be achieved through the built-in wire. The capacitive sensor composed of each detection electrode is also used for non-contact sensing of the conductive mark. When a human hand approaches, the human body capacitance is coupled to the chess grid through the proximity sensing electrode on the chess piece, and the chess grid is arranged with detection electrodes to form capacitive sensing. For a large number of chess pieces, only the proximity sensing electrode needs to be coupled to the bottom mark, 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 the capacitance. When the visually impaired person approaches or touches the chess piece, the response can be triggered to announce the identity of the chess piece and / or the position of the chess grid by voice. The visually impaired person can know the chess piece pointed by the finger without the pick-up and put-down action, with high efficiency and convenient operation for the visually impaired person at the same time.

[0019] Further, the conductive mark and the graphic mark are rings. The conductive ring at the bottom of the chess piece and each graphic mark are spaced apart and concentrically arranged. The proximity detection can be simply achieved through multiple concentric circles while identifying the chess piece; or, the alignment structure is an inlay component, and the inlay component at least includes a long stick extending downward from the bottom surface of the chess piece, and a hole for the long stick to fit and embed is arranged at the corresponding position of each chess grid on the top surface of the chessboard. At least one detection electrode is arranged in the hole, and an end mark for detecting the induction electric field constructed by the detection electrode in the hole is arranged at the end of the long stick as the conductive mark, and the inlay design of the blind chess set is used to achieve the multiplexing of proximity detection and toppling recognition.

[0020] Further, 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 in 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, which plays 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, and the formation of the proximity sensing electrode is achieved simply and at low cost.

[0021] During the traditional chess game for visually impaired players, someone else or a referee is needed to help set up the chessboard. 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 chessboard for the next game and picks up a chess piece from the storage area, the identity of the chess piece is prompted, facilitating the visually impaired player to set up the chessboard independently. Further, two chess piece storage areas can be set on each side of the chessboard, preferably located on the central axis. After a player captures a chess piece, they can put it into the storage area on the right hand, and when setting up the chess pieces, take the chess pieces from the storage area on the left hand, or directly rotate the entire chessboard.

[0022] As another improvement solution, it also includes a timer coupled with a processing module to achieve the timer's voice broadcast reminder; 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

[0023] Figure 1 is a schematic diagram of the intelligent voice chess set for the blind with the ability to identify chess pieces provided by this embodiment;

[0024] Figure 2 is a schematic diagram of multiple annular electrodes arranged at the bottom of the chess piece provided by this embodiment;

[0025] Figure 3 is a schematic diagram of encoding the bottom of the chess piece provided by this embodiment;

[0026] Figure 4 is a schematic diagram of concentric annular electrodes arranged in the groove of the chess grid provided by this embodiment;

[0027] Figure 5 is a schematic diagram of the spatial relationship between the long stick and the hole provided by this embodiment;

[0028] Figure 6 is a schematic diagram of the internal structure layout of the chess piece provided by this embodiment; and

[0029] Figure 7 is a schematic diagram of the conductive layer structure on the surface of the chess piece provided by this embodiment. Detailed Description of the Embodiment

[0030] In this embodiment, chess is taken as an example for illustration. 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] Figure 1This is a blind intelligent voice chess set with the ability to recognize chess pieces provided by this embodiment. The blind intelligent voice chess set can include Chinese chess boards, international chess boards, Go, etc. Taking the international chess board as an example. This embodiment realizes the recognition 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, enabling visually impaired people to operate conveniently. Combined with Figure 1 , the international chess set is a device composed of a chessboard 20, chess pieces 10, etc. In this solution, the chess pieces 10 are made of wood or stone, and can be black and white chess pieces, chess pieces with symbols or any font, such as Go, Chinese chess, international chess, etc. The chessboard 20 can be a chessboard with any number of rows and columns and patterns. The chessboard 20 is matched with the chess pieces 10 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. The chess piece 10 is one of the multiple chess pieces placed on the chessboard 20.

[0032] Combined with Figure 1 , the chessboard 20 of international chess includes multiple chess squares, such as chess square 206. The chessboard 20 is also provided with a voice input device 204, a voice broadcast device 205, and a timer module 201. In an optional embodiment, the chessboard 20 is also provided with areas 201 and 202 for placing different types of chess pieces. For example, based on the game rules, after a chess piece is captured, the black chess pieces are placed in area 201 and the white chess pieces are placed in area 202.

[0033] It should be noted that the following components are also provided on the chessboard 20 ( Figure 1 not shown in): a capacitor digital conversion circuit (CDC, i.e., Capacitor digital conversion), and a processing module. As Figure 4 shown, four detection electrodes 401, 402, 403, and 404 are provided in each chess square, and the capacitor digital conversion circuit is respectively coupled to each detection electrode. The processing module is respectively coupled to the capacitor digital conversion circuit and the voice broadcast device. The processing module can be a microprocessor with data analysis and processing capabilities, and the voice broadcast device can be a speaker.

[0034] In an optional embodiment, combined with Figure 2 , multiple annular electrodes 101 are provided at the bottom of the chess pieces in this embodiment as graphic identifiers, and the capacitance sensors formed by the detection electrodes on the chessboard identify the above 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 a chess piece and places it on a chess square, this embodiment can identify the identity type of the chess piece based on non-contact capacitance induction, and then remind the user through a voice broadcast device (such as a speaker).

[0035] It should be noted that this embodiment can be targeted at blind users with visual impairments or ordinary users with normal vision. Through this embodiment, blind-versus-blind battles and blind-versus-sighted battles can be achieved.

[0036] The above-mentioned graphic identifiers 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 of different identities. Combining Figure 3 , the part with electrodes can be recognized as 1, and the part without electrodes can be recognized as 0. Then Figure 3 The encoding on the left is: 1010, Figure 3 The encoding on the right is 0110. The different encodings of the two can refer to chess pieces of different identity types.

[0037] Combining Figure 4 , the detection electrodes 401, 402, 403, and 404 are circular ring electrodes, and each circular ring electrode is insulated from each other and arranged concentrically. In an alternative solution, two adjacent circular ring electrodes can form a planar mutual capacitance electric field. 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 formed with each circular ring electrode 401, 402, 403, and 404. At this time, the capacitance digital conversion circuit inputs an excitation to each circular ring electrode and receives it from itself.

[0038] In an alternative embodiment, a positioning structure is provided corresponding to 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. When two adjacent circular ring electrodes are constructed into a mutual capacitance electric field, the landing of the chess piece is guided and aligned by the positioning structure. Each annular electrode at the bottom of the chess piece falls between the corresponding two adjacent circular ring electrodes, causing a change in the dielectric constant in the corresponding electric field space, so that the output mutual capacitance value changes accordingly, achieving the above-mentioned recognition of 0 or 1. By encoding the outputs of each mutual capacitance electric field, the identity type of the chess piece can be known; when the circular ring electrode is constructed into a self-capacitance electric field, the landing of the chess piece is guided and aligned by the positioning structure. Each annular electrode at the bottom of the chess piece just aligns with each circular ring electrode on the chess grid, respectively causing a change in the self-capacitance output of each circular ring electrode. The identity type of the chess piece is known by encoding the self-capacitance output.

[0039] The above-mentioned detection electrodes can use dot electrodes to replace the circular ring electrode arrangement, and the dot electrodes are arranged outward from the center of the chess grid.

[0040] In an alternative embodiment, the positioning structure is an inlaid component. Combining Figure 5, the pair of embedded components at least includes a long rod 700 extending downward from the bottom surface of the chess piece, and holes 800 provided on the top surface of the chessboard corresponding to each chess grid position for the long rod to fit and embed, so as to prevent the chess pieces from toppling and getting messed up.

[0041] In an alternative embodiment, the present embodiment also provides a scheme for identifying the identity type of the chess piece. This scheme does not require the user to pick up and put down the chess piece for identification. As Figure 6 , Figure 7 shown, a proximity sensing electrode is provided on the upper part of the chess piece. The proximity sensing electrode is set as a coating layer 501 that wraps around the circumference of the chess piece. The coating layer 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 identifier is provided at the bottom of the chess piece. The proximity sensing electrode is coupled with the conductive identifier, and the electrical connection between the two can be achieved through the built-in wire 600. Further, the conductive identifier at the bottom of the chess piece is also set as a ring electrode, and the respective rings at the bottom of the chess piece are arranged at intervals and concentrically. The capacitive sensor formed by the respective detection electrodes arranged in the chess grid is used for non-contact sensing of the conductive identifier. Taking the outermost ring 101 at the bottom of the chess piece as the conductive identifier as an example, the output of the mutual capacitance electric field formed by the outermost and the second outermost detection electrodes 401, 402 in the chess grid is not included in the coding range, but is used for detecting the approach of a human hand. When a human hand approaches, the human body capacitance is coupled to the chess grid through the proximity sensing electrode on the chess piece, and the capacitance value of the capacitive sensor formed by the detection electrodes arranged in the chess grid changes greatly, thereby identifying the approach of a human hand.

[0042] In addition to wrapping the surface of the chess piece with a coating layer, the proximity sensing electrode can also be set as a metal body buried in 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.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit 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 chess piece recognition capability, 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; Each chess piece is provided with zero, one or more graphic marks at the bottom, the dielectric constant of the graphic marks differs from that of the chess piece body 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; At least two detection electrodes are arranged in each chess square of the chessboard, and the detection electrodes in the chess square are arranged from the center of the chess square to the outside and constitute a capacitive sensor for non-contact sensing of the coding pattern, at least one of the graphic mark and the detection electrode is set as a ring, and each chess square is correspondingly provided with a positioning structure, and 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 into the chess square; The capacitance-to-digital conversion circuit is respectively coupled to each of the detection electrodes; The processing modules are respectively coupled to the capacitance digital conversion circuit and the voice broadcasting device.

2. The intelligent voice chess set for the blind according to claim 1, characterized in that: The detection electrodes are circular ring electrodes, and the circular ring electrodes in the chessboard are 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 grid, 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 grid, under the guidance of the alignment structure, each mark at the bottom of the chess piece falls into a different self-capacitance electric field.

3. The intelligent voice chess set for the blind according to claim 1, characterized in that: The detection electrodes are point electrodes, and the point electrodes in the chess grid are arranged from the center of the chess grid to the outside; Two adjacent point electrodes construct a planar mutual capacitance electric field, and when the chess piece falls into the chess grid, 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 point electrode constructs a self-capacitance electric field, and when the chess piece falls into the chess grid, under the guidance of the alignment structure, each mark at the bottom of the chess piece falls into a different self-capacitance electric field.

4. The intelligent voice chess set for the blind according to claim 2 or 3, 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.

5. 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 in.

6. The intelligent voice chess set for the blind according to claim 5, 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.

7. The intelligent voice chess set for the blind according to claim 5, 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.

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

9. The intelligent voice chess set for the blind according to claim 8, characterized in that: Each of the detection electrodes in the chess grid 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.

10. The intelligent voice chess set for the blind according to claim 1, characterized in that: The orthographic projection of the bottom of the chess piece is circular.

11. The intelligent voice chess set for the blind according to claim 1, characterized in that: At least one proximity sensing electrode is disposed on the upper portion of the chess piece, and a conductive mark is disposed on the bottom of the chess piece, and the proximity sensing electrode is coupled to the conductive mark; The capacitive sensor formed by each of the detection electrodes is also used for contactless sensing of the conductive mark.

12. The intelligent voice chess set for the blind according to claim 11, characterized in that: The conductive mark and the graphic mark are circular rings, and the conductive circular ring at the bottom of the chess piece and the graphic marks are spaced apart and concentrically arranged; Alternatively, the alignment structure is an embedded component, which includes at least a long stick extending downward from the bottom surface of the chess piece, and a hole arranged on the top surface of the chessboard corresponding to each chess square position for the long stick to fit into, at least one detection electrode is built into the hole, and an end mark of the long stick is provided at the end for detection of the induced electric field constructed by the detection electrode in the hole as the conductive mark.

13. The intelligent voice chess set for the blind according to claim 11, 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.

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, which 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 that of the chess grid.

15. The intelligent voice chess set for the blind according to claim 1, characterized in that: Also included is a timer coupled to the processing module; Alternatively, guiding Braille is provided on each row and column along the chessboard.

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