String displacement detection mechanism, electronic stringed musical instrument and sound production control method thereof

Abstract

The present application relates to a kind of string displacement detection mechanism, electronic stringed instrument and its sound production control method, string displacement detection mechanism includes Hall sensor, magnet and string, Hall sensor is matched with the described, one of Hall sensor and magnet is directly connected with string, the other is set to the side of the extension direction of string, so that the relative position of Hall sensor and magnet has initial state and change state;Initial state, string is static, the relative position of Hall sensor and magnet remains unchanged;Change state, string is plucked, magnet or Hall sensor connected with string can swing in the non-axial direction of string, the relative position of Hall sensor and magnet changes.Not only data acquisition is more comprehensive, but also data processing is advanced, accuracy and sensitivity are higher, can better improve the problem of instrument sound delay, guarantee live performance effect.

Description

Technical Field

[0001] This invention relates to the field of intelligent musical instrument technology, and in particular to a string displacement detection mechanism, an electronic stringed instrument, and a sound control method thereof. Background Technology

[0002] Traditional acoustic guitars produce sound by vibrating the strings, which in turn vibrate the guitar body. Typical smart guitars mimic the acoustic guitar's sound production principle by installing pickups on the body. When the strings vibrate, the pickups collect the vibration information and convert the vibration signal into an electrical signal to produce sound. However, during performance, the traditional smart guitar's sound production method results in a delay in sound output. Furthermore, the common method of collecting data based on the axial displacement of the strings is incomplete, lacking accuracy and precision, thus affecting the live performance experience. Summary of the Invention

[0003] Based on this, the present invention provides a string displacement detection mechanism, an electronic stringed instrument and a sound production control method thereof, which can effectively improve the problem of sound production delay and ensure the performance effect on site.

[0004] A string displacement detection mechanism includes a Hall sensor, a magnet, and a string. The Hall sensor is matched with the magnet. One of the Hall sensor and the magnet is directly connected to the string, while the other is disposed on the side of the string in the direction of its extension. The relative positions of the Hall sensor and the magnet have an initial state and a changing state. In the initial state, the string is stationary, and the relative positions of the Hall sensor and the magnet remain unchanged. In the changing state, the string is plucked, and the magnet or the Hall sensor connected to the string can swing in a non-axial direction of the string, thus changing the relative positions of the Hall sensor and the magnet.

[0005] In one embodiment, the string displacement detection mechanism further includes an elastic element, one end of which is fixed and the other end is connected to the string. When the string is plucked, the elastic element deforms, causing the relative position of the Hall sensor and the magnet to return from the changed state to the initial state.

[0006] In one embodiment, the string displacement detection mechanism further includes a fixed first frame through which the string passes, one end of the elastic element being connected to the inner or outer side of the first frame, and the other end of the elastic element being connected to the string.

[0007] In one embodiment, the string displacement detection mechanism further includes a fixed second frame located at the end of the string away from the first frame, one end of the elastic element being connected to the inner or outer side of the second frame, and the other end of the elastic element being connected to the string.

[0008] In one embodiment, the chord displacement detection mechanism further includes a guide structure, which is sleeved outside the elastic member. The first frame is connected to the guide structure, and the elastic member is connected between the end of the chord and the first frame. Alternatively, the inner wall of the guide structure is provided with a baffle, and the elastic member is connected between the end of the chord and the baffle.

[0009] In one embodiment, the end of the string has a stop member, the stop member is rod-shaped, the stop member passes through the first frame and the elastic member, the first end of the stop member has a protrusion, one end of the elastic member abuts against the protrusion, and the string is riveted to the second end of the stop member; or, the stop member is spherical or block-shaped, the string passes through the first frame and the elastic member, and one end of the elastic member abuts against the stop member.

[0010] In one embodiment, the magnet is ring-shaped or cylindrical.

[0011] In one embodiment, the chord displacement detection mechanism further includes a support platform disposed below the chord, and the Hall sensor is mounted on the support platform.

[0012] In one embodiment, the Hall sensor includes one or more, with the single Hall sensor positioned directly opposite the magnet or the multiple Hall sensors positioned around the periphery of the magnet.

[0013] In one embodiment, the Hall sensor includes two, one disposed below the magnet and the other disposed to the side of the magnet; or, the two Hall sensors are disposed on opposite sides of the magnet.

[0014] In one embodiment, the minimum distance between the Hall sensor and the magnet is 0.6mm-1.5mm.

[0015] In one embodiment, the Hall sensor is connected to the string, and the Hall sensor is connected to the sensor control unit via a flexible electrical connector.

[0016] An electronic stringed instrument includes a body and a string displacement detection mechanism, wherein the string displacement detection mechanism is mounted on the body.

[0017] In one embodiment, the electronic stringed instrument further includes a string vibration detection mechanism, the string having an upper end and a lower end, the Hall sensor being located to the side of one of the upper or lower ends of the string, and the string vibration detection mechanism being disposed to the side of the other end of the string.

[0018] A sound production control method for an electronic stringed instrument, employing the aforementioned string displacement detection mechanism, includes the following steps:

[0019] Acquire magnetic field information collected by a Hall sensor, the magnetic field information including the change in magnetic field generated by the magnet or Hall sensor connected to the string swinging in the non-axial direction of the string when the string is plucked;

[0020] The corresponding sound effect is output based on the magnetic field information.

[0021] In one embodiment, the change in magnetic flux collected by the Hall sensor is acquired, and based on the change in magnetic flux collected by the Hall sensor, the string-plucking action that approaches or moves away from the direction of the Hall sensor is identified.

[0022] In one embodiment, the Hall sensors are respectively located below and to the side of the magnet, and the control method further includes the following steps:

[0023] The change in magnetic flux detected by the Hall sensor on the side is used to identify the left or right plucking motion; or,

[0024] The increase or decrease of magnetic flux collected by the Hall sensor below is obtained, and the string-beating or string-hooking action is identified based on the change of magnetic flux collected by the Hall sensor below.

[0025] A method for controlling the sound production of an electronic stringed instrument, using the aforementioned electronic stringed instrument, the method comprising the following steps:

[0026] Acquire magnetic field information collected by a Hall sensor, the magnetic field information including the change in magnetic field generated by the magnet or Hall sensor connected to the string swinging in the non-axial direction of the string when the string is plucked;

[0027] Determine whether the string is plucked correctly based on the magnetic field information;

[0028] If it is determined to be a normal plucking, obtain the string vibration information collected by the string vibration detection mechanism;

[0029] The string plucking force is determined based on the vibration information.

[0030] The corresponding sound effect is output according to the force of the plucking.

[0031] The string displacement detection mechanism, electronic stringed instrument, and sound control method of this invention allow the string to move synchronously with a directly connected magnet or Hall sensor the instant the string is plucked. The magnet or Hall sensor can swing in the non-axial direction and extend / retract in the axial direction. The Hall sensor detects changes in the direction and intensity of the magnetic field of the magnet, determining whether the string is being plucked normally and the force of the plucking, thus enabling immediate output of the played sound. By collecting magnetic field information from the axial extension / retraction and non-axial swing of the magnet using the Hall sensor, the data is more comprehensive, with higher sensitivity and accuracy. The Hall sensor transmits the collected data in real time, triggering data processing the instant the string is plucked. Compared to traditional methods that require waiting until the string is released from the vibrating cavity before processing string vibration information or simply collecting axial data, this invention not only acquires more comprehensive data but also processes data earlier, resulting in higher accuracy and sensitivity. This better addresses the problem of instrument sound delay and ensures optimal performance on stage. Attached Figure Description

[0032] The above and other objects, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0033] Figure 1 This is a split schematic diagram of an electronic stringed instrument according to one embodiment.

[0034] Figure 2 This is a schematic diagram of a string displacement detection mechanism according to one embodiment;

[0035] Figure 3 yes Figure 2 A partially enlarged schematic diagram;

[0036] Figure 4 This is a split schematic diagram of a string vibration detection mechanism according to one embodiment;

[0037] Figure 5 This is a split schematic diagram of a string vibration detection mechanism according to another embodiment.

[0038] The attached figures are labeled as follows:

[0039] 10. String; 110. First stop; 120. Second stop; 20. Mounting base; 201. Clearance hole; 210. First frame; 220. Second frame; 230. Base plate; 30. String displacement detection mechanism; 310. Hall sensor; 320. Magnet; 330. Elastic element; 340. Support platform; 350. Guide structure; 71. String vibration detection mechanism; 711. Mounting frame; 712. Isolator; 713. Pickup element; 714. 715. Pressure sensor; 72. Circuit board; 73. String vibration detection mechanism; 74. Mounting frame; 75. Isolator; 76. Sound pickup; 77. Ceramic sound pickup plate; 78. Circuit board; 89. Locking assembly; 80. Connecting rod; 812. Locking sleeve; 813. Washer; 82. Locking assembly; 81. Limiting frame; 822. Guide component; 823. Screw; 91. First noise reduction block; 92. Second noise reduction block; 100. Instrument body. Detailed Implementation

[0040] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0041] The specific embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0042] Reference Figure 1 This application provides an electronic stringed instrument, including a body 100 and a string displacement detection mechanism 30, which is mounted on the body 100. In this embodiment, the electronic stringed instrument is a guitar. In other embodiments, the electronic stringed instrument can also be a ukulele, guzheng, pipa, or other instruments whose primary playing method is plucking strings 10 to cause them to vibrate. The body 100 contains an MCU computing chip (not shown in the figure) to acquire string plucking information collected by the string displacement detection mechanism 30.

[0043] Reference Figure 2 , Figure 3In one embodiment, the string displacement detection mechanism 30 includes a Hall sensor 310, a magnet 320, and a string 10, wherein the Hall sensor 310 is matched with the magnet 320. One of the Hall sensor 310 and the magnet 320 is directly connected to the string 10. Direct connection means that the two are in direct contact and connected together. The other is located on the side of the string 10 in its extension direction. One or both ends of the string 10 in its axial direction refer to the ends of the string 10. The side of the string 10 in its extension direction is used to distinguish the ends, i.e., not located at the ends of the string 10, but offset relative to the axial direction of the string 10, such as being located above, below, to the left, to the right, or around the outer circumference of the string. The relative position of the Hall sensor 310 and the magnet 320 has an initial state and a changing state. In the initial state, the string 10 is stationary, and the relative position of the Hall sensor 310 and the magnet 320 remains unchanged. In the changing state, the string 10 is plucked, and the magnet 320 or the Hall sensor 310 connected to the string 10 can swing in a non-axial direction of the string 10, changing the relative position of the Hall sensor 310 and the magnet 320. The axial direction refers to the direction in which the central axis of the string 10 extends. Other directions besides the axial direction are collectively referred to as non-axial directions, such as up, down, left, and right. In the changing state, the string 10 is plucked, such as by plucking the string to the left, plucking the string to the right, hooking the string, or striking the string, causing displacement at the end of the string 10. One of the magnets 330 or the Hall sensor 310 directly connected to the string 10 moves accordingly, while the other, not connected to the string 10, remains in a fixed position.

[0044] When the electronic stringed instrument of this embodiment is used, the moment the string 10 is plucked, the string 10 moves synchronously with the magnet 320 or Hall sensor 310 directly connected to it. The magnet 320 or Hall sensor 310 directly connected to the string can swing in the non-axial direction and extend and retract in the axial direction of the string 10. The Hall sensor 310 detects the changes in the direction and intensity of the magnetic field of the magnet 320, and determines whether the string 10 is being plucked normally and the plucking force, thereby outputting the playing sound in real time. By collecting the magnetic field information of the axial extension and non-axial swing of the magnet 320 through the Hall sensor 310, the data is more comprehensive, and the sensitivity and accuracy are higher. The Hall sensor 310 transmits the collected data in real time, and data processing is triggered the moment the string 10 is plucked. Compared with the traditional method that requires waiting until the string is released from the vibration cavity before processing the string vibration information or simply collecting axial data, the solution of this embodiment not only acquires more comprehensive data, but also processes the data in advance, with higher accuracy and sensitivity, which can better improve the problem of instrument sound delay and ensure the effect of live performance.

[0045] Furthermore, in one embodiment, the magnet 320 is directly connected to the string 10. The Hall sensor 310 is disposed on the side of the string 10 in the extension direction, and the magnet 320 moves synchronously with the string 10. The string displacement detection mechanism 30 also includes an elastic element 330, one end of which is fixed and the other end is connected to the string 10. When the string 10 is plucked, the elastic element 330 deforms, restoring the relative position of the Hall sensor 310 and the magnet 320 from the changed state to the initial state. The elastic element 330 has a specific elastic force, which can produce deformations such as compression, stretching, or swaying, keeping the string 10 taut in the initial state. When the string 10 is plucked, the elastic element 330 stores energy, restoring the string 10 to the initial state. During the change, the elastic element 330 oscillates to a certain extent, causing the string 10 and the magnet 320 to oscillate to a certain extent non-axially. The elastic element 330 can be a spring, an elastic sponge column, a silicone column, etc.

[0046] Alternatively, in one embodiment, reference is made to Figure 3 The string displacement detection mechanism 30 further includes a fixedly mounted first frame 210 through which the string 10 passes. One end of the elastic element 330 is connected to the inner or outer side of the first frame 210, and the other end of the elastic element 330 is connected to the string 10. The inner side refers to the side closer to the center of the string 10 being plucked, and vice versa. Figure 3 One end of the elastic element 330 is connected to the outside of the first frame 210. The elastic element 330 can be directly connected to the string 10, or indirectly connected to the string 10 through other connecting structures. In this embodiment, the elastic element 330 is a compression spring. One end of the elastic element 330 abuts against the first frame 210, and the other end can abut against the stop at the end of the string 10 or a connecting structure. When the string 10 is plucked, it compresses the elastic element 330, thus storing energy. After the string 10 is released, it returns to its initial state under the action of the elastic element 330. In other embodiments, one end of the elastic element 330 is connected to the inside of the first frame 210, and the other end is connected to the string 10. The elastic element 330 can be directly connected to the string 10, or it can be indirectly connected to the string 10 through other connection structures. The elastic element 330 is a tension spring. Both ends of the elastic element 330 are fixed. When the string is plucked, the elastic element 330 is pulled to move synchronously. At this time, the elastic element 330 is stretched and stores energy. After the string 10 is released, the string 10 returns to its initial state under the action of the elastic element 330.

[0047] Optionally, in one embodiment, the string displacement detection mechanism 30 further includes a fixedly mounted second frame 220, located at the end of the string 10 away from the first frame 210. One end of the elastic member 330 is connected to the inner or outer side of the second frame 220, and the other end of the elastic member 330 is connected to the string 10. Similarly, the elastic member 330 located on the inner or outer side of the second frame 220 has the same function as that on the first frame 210. Depending on actual usage requirements, the elastic member 330 can be provided at one or both ends of the string to restore the relative position of the Hall sensor 310 and the magnet 330 from a changed state to an initial state; it also affects the vibration amplitude of the string 10 and the magnet 320, amplifying the swing stroke of the magnet 320.

[0048] Reference Figure 3 In one embodiment, the string displacement detection mechanism 30 further includes a guide structure 350, which is sleeved outside the elastic member 330. The first frame 310 is connected to the guide structure 350, and the elastic member 330 is connected between the end of the string 10 and the first frame 210. Optionally, the inner wall of the guide structure 350 is provided with a baffle (not shown in the figure), and the elastic member 330 is connected between the end of the string and the baffle. A guide sleeve 350 connected to the first frame 310 is provided outside the elastic member 330 to limit the extension and retraction of the elastic member 330 and the movement direction of the end of the string 10, so that it moves along the axial direction of the string 10, thereby improving the sensitivity, accuracy, and comprehensiveness of the data acquisition by the Hall sensor 310.

[0049] Optionally, refer to Figure 3 In one embodiment, the end of the string 10 has a stop member, which passes through the first frame 210 and the elastic member 330. The stop member disposed on the first frame 210 is a first stop member 110. The first frame 210 has a clearance hole 201, through which the first stop member 110 at the end of the string 10 passes, and the first end of the elastic member 330 abuts against the stop member. Once the string 10 is plucked, the string 10 and the stop member at its end move synchronously, and the first stop member 110 compresses the elastic member 330, pressing the second end of the elastic member 330 against the stop plate of the first frame 210 or the guide structure 350, and the elastic member 330 is continuously compressed. In this embodiment, the stop member is rod-shaped, and the first end of the stop member has a protrusion, the elastic member 330 abuts against the protrusion, and the string 10 is riveted to the second end of the stop member. The rod-shaped stop coincides with the central axis of the string 10, and the high coaxiality between the two improves the accuracy and sensitivity of the Hall sensor 310's detection data. Optionally, in other embodiments, the stop can also be spherical or block-shaped. The string 10 passes through the first frame 210 and the elastic member 330, and the first end of the elastic member 330 abuts against the spherical or block-shaped stop.

[0050] Optionally, in one embodiment, the magnet 3200 is ring-shaped or cylindrical, and the magnet 320 is adhered to the string 10. The magnet 320 can be cylindrical, trapezoidal, conical, etc. A through hole can be made in the magnet 320, through which the magnet 320 is strung onto the string 10. Alternatively, the magnet 320 can be set in a semi-ring shape, covering the string 10, and then glued between the magnet 320 and the string 10 to bond them together, allowing the magnet 320 to move synchronously with the string 10. This configuration is simple in structure, easy to install, and reduces costs.

[0051] Reference Figure 3 In one embodiment, the string displacement detection mechanism 30 further includes a support platform 340, which is disposed below the string 10, and the Hall sensor 310 is mounted on the support platform 340. The support platform 340 supports the Hall sensor 310, bringing it closer to the magnet 320 for more sensitive data acquisition. A spring gap is provided between the support platform 340 and the string 10 to avoid affecting the normal springing of the string 10.

[0052] In one embodiment, the Hall sensor 310 may be single or multiple. A single Hall sensor 310 may be positioned directly opposite the magnet 320. Multiple Hall sensors 310 may be positioned around the outer periphery of the magnet 320. (See also...) Figure 3 In this embodiment, the Hall sensor 310 is non-contact with the magnet 330. Two Hall sensors 310 are included, one positioned below the magnet 320 and the other to the side of the magnet 320. The two Hall sensors 310 located below and to the side of the magnet 320 detect the magnetic field information of the magnet 320, ensuring the integrity and accuracy of the detection data. In other embodiments, the two Hall sensors 310 can be positioned on opposite sides of the magnet 320. Detecting the magnetic field information of the magnet 320 using two Hall sensors 310 on the left and right sides of the magnet 320 avoids the string 10 touching the Hall sensors 310 during plucking, further ensuring the integrity and accuracy of the detection data.

[0053] Optionally, in other embodiments, each magnet 330 is provided with one, two, three, four, five, or more Hall sensors 310. The multiple Hall sensors 310 are arranged around the outer periphery of the magnet 330 with the magnet 330 as the center. The multiple Hall sensors 310 are used to detect the magnet 320. The data collected by different Hall sensors 310 are used to determine the centering offset and distance of the magnet 320, thereby further improving the comprehensiveness, accuracy, and precision of the data.

[0054] Optionally, in one embodiment, the minimum distance between the Hall sensor 310 and the magnet 320 is 0.6mm-1.5mm. For example, the minimum distance between the Hall sensor 310 and the magnet 320 can be set to 0.8mm, 1mm, or 1.2mm. The smaller the distance between the Hall sensor 310 and the magnet 320, the more sensitive the sensor will be, but the distance must be less than the assembly tolerance to prevent the magnet from hitting the housing of the Hall sensor 310.

[0055] Reference Figure 4 and Figure 5 In one embodiment, the electronic stringed instrument further includes a string vibration detection mechanism 71 or 72. The string 10 has an upper end and a lower end. The Hall sensor 310 is located on the side of one of the upper or lower ends of the string 10, and the string vibration detection mechanism 71 or 72 is located on the side of the other end of the string 10. The string vibration detection mechanism 71 or 72 can adopt existing technologies for detecting the vibration data of the string 10. When the string 10 is pressed against the vibration detection mechanism 72, vibration is generated after plucking the string 10. The string vibration detection mechanism 71 or 72 collects the vibration information of the string 10. The MCU computing chip can determine the plucking force of the string 10 based on the vibration information, and thus output corresponding sound effects according to different plucking forces. Simultaneously, the Hall sensor 310 detects the change in magnetic field when the string 10 is plucked, and the string vibration detection mechanism 71 or 72 detects the vibration information of the string 10. The MCU computing chip can not only determine in advance whether the string 10 is being plucked normally through the magnetic field information transmitted by the Hall sensor 310, but also more accurately determine the magnitude of the force of the string 10 being plucked through the string vibration detection mechanism 71 or 72. This setting can reduce the assembly accuracy of the string displacement detection mechanism 30 and reduce the assembly cost.

[0056] Optionally, combined Figure 1 , Figure 2 In one embodiment, the electronic stringed instrument further includes a mounting base 20, which includes a first frame 210, a second frame 220, and a base plate 230. The first frame 210 is connected to the upper surface of a first end of the base plate 230, and the second frame 220 is connected to the upper surface of a second end of the base plate 230. A guide structure 350 is mounted on the first frame 210, and the other end of the string 10 is fixed to the second frame 220. A string vibration detection mechanism 71 or 72 is disposed near the second frame 220.

[0057] Alternatively, in one embodiment, reference is made to Figure 4 and Figure 5In one embodiment, the electronic stringed instrument further includes a locking assembly 81 or 82, wherein the string 10 is pressed against the string vibration detection mechanism 71 or 72, and one end of the string 10 away from the connector 320 is connected to the locking assembly 81 or 82. The other end of the string 10 is locked by the locking assembly 81 or 82 to keep the string 10 taut.

[0058] Optionally, refer to Figure 4 In one embodiment, the locking assembly 82 includes a limiting frame 821, a guide member 822, and a screw 823. A second stop head 120 at the end of the string 10 furthest from the Hall sensor 310 is engaged with the limiting frame 821. The guide member 822 is disposed along the extension direction of the string 10 and connected to the second frame 220. The limiting frame 821 is slidably disposed on the guide member 822. One end of the screw 823 passes through the second frame 220 and is connected to the limiting frame 821. The screw 823 is threadedly connected to either the limiting frame 821 or the second frame 220. Rotating the screw 823 causes the limiting frame 821 to move along the guide member 822, thereby flexibly adjusting the tension of the string 10.

[0059] Reference Figure 4 In one embodiment, the string vibration detection mechanism 71 includes a mounting frame 711, an isolator 712, a pickup 713, a pressure sensor 714, and a circuit board 715. The isolator 712 is disposed within the mounting frame 711, the pickup 713 is disposed within the isolator 712, the pressure sensor 714 is attached to the pickup 713, and the circuit board 715 is connected to the pressure sensor 714. The string 10 is pressed against the top of the pickup 713. After the string 10 is plucked, the vibration generated by the instrument body 100 is buffered and isolated by the isolator 712 to avoid interfering with the acquisition of the string 10 vibration information. The vibration generated by the string 10 is transmitted to the pickup 713. The pressure sensor 714 is attached to the pickup 713 to detect the pressure change during the string 10 vibration process. The pressure change feeds back the oscillation information of the string 10, and the acquired oscillation information is transmitted to the circuit board 715, and then transmitted to the MCU computing chip through the circuit board 715. In this embodiment, the string vibration detection mechanism 71 adopts a split structure, with each string 10 corresponding to one string vibration detection mechanism 71 and one mounting base 20, avoiding interference between adjacent strings 10 and affecting the accuracy of data acquisition. Optionally, the pressure sensor 714 is a chip strain gauge or other existing pressure-collecting components.

[0060] Optionally, refer to Figure 5In another embodiment, the locking assembly 81 includes a connecting rod 811 and a locking sleeve 812. The end of the string 10 furthest from the Hall sensor 310 is connected to the connecting rod 811. The connecting rod 811 passes through the mounting base 20 and is threadedly connected to the locking sleeve 812. In this embodiment, the end of the string 10 is directly riveted to the connecting rod 811. Rotating the locking sleeve 812 moves the connecting rod 811, allowing for flexible adjustment of the tension of the string 10. Furthermore, a washer 813 is fitted onto one end of the connecting rod 811 that passes through the mounting base 20, and a locking sleeve 812 abuts against one side of the washer 813. When the string 10 needs to be tensioned, due to the restriction of the washer 813, the locking sleeve 812 cannot rotate further towards the string 10. At this time, the connecting rod 811, which is threadedly connected to the locking sleeve 812, is driven to move towards the direction of the locking sleeve 812 to tighten the string 10. When the string 10 needs to be loosened, the locking sleeve 812 rotates in the opposite direction, exposing the connecting rod 811 between the washer 813 and the locking sleeve 812. The connecting rod 811 can then move towards the string 10 to loosen the string 10. Compared to Figure 4 The locking component 82 in this embodiment has an optimized structure, reduces the installation process, and lowers the installation difficulty.

[0061] Reference Figure 5 In another embodiment, the string vibration detection mechanism 72 includes a mounting frame, an isolator 722, a pickup body 723, a ceramic pickup plate 724, and a circuit board 725. The isolator 722 is disposed within the mounting frame, the pickup body 723 is disposed within the isolator 722, the ceramic pickup plate 724 is attached to the pickup body 723, and the circuit board 725 is connected to the ceramic pickup plate 724. The string 10 is pressed against the top of the pickup body 723. After the string 10 is plucked, the vibration generated by the instrument body 100 is buffered and isolated by the isolator 722 to avoid interfering with the acquisition of the string 10 vibration information. The vibration generated by the string 10 is transmitted to the pickup body 723, the ceramic pickup plate 724 is attached to the pickup body 723 to acquire the oscillation information of the string 10, and transmits the acquired oscillation information to the circuit board 725, and then through the circuit board 725 to the MCU computing chip. In this embodiment, the mounting frame 721 and mounting base 20 of the string vibration detection mechanism 72 adopt an integrated structure to reduce the installation process and assembly difficulty. The isolator 722 is installed inside the mounting frame 721, the circuit board 725 is made of flexible board, and the ceramic pickup plate 724 is sandwiched between the flexible boards. Both are attached to the side of the pickup body 723 to reduce noise interference and improve the stability and sensitivity of data acquisition.

[0062] Optionally, the string detection mechanism further includes a first noise reduction block 91 and a second noise reduction block 92, located between the first frame 210 and the second frame 220. The first noise reduction block 91 is closer to the first frame 210, and the second noise reduction block 92 is closer to the second frame 220. Both ends of the string 10 pass through the first noise reduction block 91 and the second noise reduction block 92, respectively. By setting the first noise reduction block 91 and the second noise reduction block 92 at both ends of the string 10, the noise generated by the vibration of the instrument body 100 is reduced. The first noise reduction block 91 and the second noise reduction block 92 can be made of silicone, high-density sponge, or other elastic materials that can absorb vibration.

[0063] During assembly, magnet 320 is installed on string 10, support platform 340 with Hall sensor 310 is installed on mounting base 20, the distance between Hall sensor 310 and magnet 320 can be flexibly adjusted, guide structure 350 is installed on mounting base 20, first end of string 10 is locked in first noise reduction block 91, end of first end of string 10 is passed through elastic member 330 and mounting base 20, guide structure 350 is sleeved on elastic member 330 and connected to mounting base 20, second end of string 10 is locked in second noise reduction block 92 and then pressed on vibration detection component 72 or vibration detection component 71, and finally connected to locking component 81 or 82. Locking component 81 or 82 rotates relative to second frame 220 to adjust the tension of string 10.

[0064] In one embodiment, the Hall sensor 310 is connected to the string 10. The Hall sensor is connected to the sensor control unit through a flexible electrical connector. The flexible electrical connector allows the Hall sensor 310 to move smoothly and detect changes in the magnetic field when the string is plucked.

[0065] Furthermore, one embodiment of this application also provides a sound production control method for an electronic stringed instrument, employing the string displacement detection mechanism 30 described in at least one of the above embodiments. The control method includes the following steps:

[0066] S110: Acquire the magnetic field information collected by the Hall sensor 310. This magnetic field information includes the change in magnetic field generated by the magnet 320 or Hall sensor 310 connected to the string 10 oscillating in the non-axial direction of the string 10 when the string 10 is plucked. Both axial extension and non-axial oscillation can cause changes in the magnetic field. For example, when the string 10 is stationary, the magnetic field strength is A. When the string 10 is lightly plucked, the magnetic field strength instantly decreases to B, and when the string 10 falls, the magnetic field strength increases to C. When the string 10 is heavily plucked, the magnetic field strength instantly decreases to D, and when the string 10 falls again, the magnetic field strength is E. Once the magnetic field strength changes from A by more than a specific value, or the magnetic field direction changes by more than a specific angle, it can be determined that the string 10 has been normally plucked. Furthermore, determining that the string 10 has been normally plucked is not a necessary step and can be omitted as appropriate.

[0067] S120: Determine whether string 10 is plucked normally and the plucking force based on the magnetic field information. The MCU computing chip can determine whether string 10 is plucked normally by changing the direction or intensity of the magnetic field, and the plucking force of string 10 can be analyzed by changing the magnitude of the magnetic field intensity. Furthermore, determining whether string 10 is plucked normally is not a necessary step and can be omitted as appropriate.

[0068] S130: Output the corresponding sound effect according to the plucking force. The MCU computing chip analyzes the plucking force to determine the volume that string 10 should produce, and then outputs the corresponding sound effect.

[0069] Compared to traditional smart musical instruments that require waiting for string 10 to be released and vibrate before collecting the vibration information of string 10 for sound production, or simply collecting the magnetic field changes caused by the axial movement of the string, the sound production control method of the electronic stringed instrument in this embodiment can trigger data processing the moment string 10 is plucked. The data is more comprehensive, accurate, and precise. The data processing is carried out in advance, which can better improve the problem of instrument sound production delay and ensure the effect of live performance.

[0070] Optionally, in one embodiment, the change in magnetic flux collected by the Hall sensor 310 is acquired, and the string-plucking action that approaches or moves away from the Hall sensor is identified based on the change in magnetic flux collected by the Hall sensor.

[0071] When the string is plucked, the displacement of the string will cause the magnet 330 or Hall sensor 310 connected to it to move together. This process will cause the magnetic flux detected by the Hall sensor 310 to change. An increase in magnetic flux indicates that the Hall sensor 310 and the magnet 330 are moving closer to each other, while a decrease in magnetic flux indicates that the Hall sensor 310 and the magnet 330 are moving further apart. Therefore, based on the change in magnetic flux and the initial positions of the Hall sensor 310 and the magnet 330, the direction of the string plucking action can be identified, and further, the left plucking, right plucking, snapping, and hooking actions can be identified.

[0072] Optionally, refer to Figure 3 In one embodiment, the Hall sensor 310 is respectively provided below and to the side of the magnet 320, and the control method further includes the following steps:

[0073] The system acquires information about the increase or decrease in magnetic flux collected by the Hall sensor 310 on the side, and identifies left and right string plucking actions based on the changes in magnetic flux collected by the Hall sensor 310 on the side. When plucking the string to the left, the string 10 and its directly connected magnet 320 simultaneously shift to the left, and the magnetic flux collected by the Hall sensor 310 on the left side of the magnet 320 increases; when plucking the string to the right, the string 10 and its directly connected magnet 320 simultaneously shift to the right, and the magnetic flux collected by the Hall sensor 310 on the left side of the magnet 320 decreases. Thus, the left and right string plucking actions are identified based on the changes in magnetic flux collected by the Hall sensor 310 on the side. The MCU computing chip identifies the left and right string plucking actions based on the changes in magnetic flux collected by the Hall sensor 310 and outputs the corresponding sound effects.

[0074] Optionally, in one embodiment, the increase or decrease in magnetic flux collected by the Hall sensor 310 is obtained, and the string-tapping or string-plucking action is identified based on the change in magnetic flux collected by the Hall sensor 310. When plucking the string, the string 10 and the directly connected magnet 320 simultaneously shift upwards, and the magnetic flux decreases; when tapping the string, the string 10 and the directly connected magnet 320 simultaneously shift downwards, and the magnetic flux increases. The string-tapping or string-plucking action is identified based on the change in magnetic flux collected by the Hall sensor 310. The MCU computing chip identifies the string-tapping or string-plucking action based on the change in magnetic flux collected by the Hall sensor 310 and outputs the corresponding sound effect.

[0075] Another embodiment of this application provides a sound production control method for an electronic stringed instrument, which includes a string displacement detection mechanism 30 and a string vibration detection structure 71 or 72. The control method includes the following steps:

[0076] S410: Acquire the magnetic field information collected by the Hall sensor 310. This magnetic field information includes the change in magnetic field generated by the magnet 320 or the Hall sensor 310 connected to the string 10 oscillating in the non-axial direction of the string 10 when the string 10 is plucked. Both axial extension and non-axial oscillation can cause changes in the magnetic field. For example, if the magnetic field direction is M when the string 10 is stationary, the magnetic field direction changes instantaneously when the string 10 is plucked. Or, if the magnetic field strength is A when the string 10 is stationary, the magnetic field strength changes instantaneously when the string 10 is plucked.

[0077] S420: Determine whether the string is being plucked normally based on the magnetic field information. Once the magnetic field strength changes by A exceeding a specific value, or the magnetic field direction changes by an angle exceeding a specific angle, it can be determined that string 10 is being plucked normally.

[0078] S430: If the string is determined to be plucked normally, acquire the string vibration information collected by the string vibration detection mechanism 71 or 72. The string vibration detection mechanism 71 or 72 collects the magnitude of the vibration force generated by the string 10. For example, when the string 10 is lightly plucked, the vibration force is F, and when the string 10 is heavily plucked, the vibration force is G. The string vibration detection mechanism 71 or 72 can adopt an existing structure for detecting the vibration of the string 10, or it can adopt the string vibration detection mechanism 71 or 72 in the above embodiment.

[0079] S440: Determine the plucking force of the string based on the vibration information.

[0080] S450: Outputs the corresponding sound effect based on the plucking force. The MCU computing chip analyzes the plucking force to determine the volume that string 10 should produce, and then outputs the corresponding sound effect.

[0081] Compared to traditional smart musical instruments that require waiting for the string 10 to vibrate after being released before collecting the vibration information for sound production, the sound production control method of the electronic stringed instrument in this embodiment can trigger data processing the moment the string 10 is plucked. The data processing is brought forward, which improves the problem of instrument sound production delay to a certain extent and ensures the performance effect on site. At the same time, the string vibration detection mechanism 71 or 72 can more accurately detect the vibration information of the string 10 and determine the magnitude of the force of the string 10 being plucked, which can reduce the assembly precision of the string displacement detection mechanism and reduce costs.

[0082] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0083] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the devices or elements involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0084] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0085] While various embodiments of the invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in the practice of the invention. The appended claims are intended to define the scope of protection of the invention and therefore cover modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A chord displacement detection mechanism, characterized in that, The device includes a Hall sensor, a magnet, and a string. The Hall sensor is matched with the magnet. One of the Hall sensor and the magnet is directly connected to the string, while the other is disposed on the side of the string in the direction of its extension. This allows the relative positions of the Hall sensor and the magnet to have an initial state and a changing state. In the initial state, the string is stationary, and the relative positions of the Hall sensor and the magnet remain unchanged. In the changing state, the string is plucked, and the magnet or Hall sensor connected to the string can swing in a non-axial direction of the string, thus changing the relative positions of the Hall sensor and the magnet.

2. The chord displacement detection mechanism according to claim 1, characterized in that, The string displacement detection mechanism also includes an elastic element, one end of which is fixed and the other end is connected to the string. When the string is plucked, the elastic element deforms, causing the relative position of the Hall sensor and the magnet to return from the changed state to the initial state.

3. The chord displacement detection mechanism according to claim 2, characterized in that, It also includes a fixed first frame through which the string passes, one end of the elastic element is connected to the inner or outer side of the first frame, and the other end of the elastic element is connected to the string.

4. The chord displacement detection mechanism according to claim 3, characterized in that, It also includes a fixed second frame, which is located at the end of the string away from the first frame. One end of the elastic element is connected to the inner or outer side of the second frame, and the other end of the elastic element is connected to the string.

5. The chord displacement detection mechanism according to claim 3, characterized in that, It also includes a guide structure, which is sleeved outside the elastic member. The first frame is connected to the guide structure, and the elastic member is connected between the end of the string and the first frame. Alternatively, the inner wall of the guide structure is provided with a baffle, and the elastic member is connected between the end of the string and the baffle.

6. The chord displacement detection mechanism according to claim 5, characterized in that, The end of the string has a stop member, which is rod-shaped and passes through the first frame and the elastic member. The first end of the stop member has a protrusion, and one end of the elastic member abuts against the protrusion. The string is riveted to the second end of the stop member; or, the stop member is spherical or block-shaped, the string passes through the first frame and the elastic member, and one end of the elastic member abuts against the stop member.

7. The chord displacement detection mechanism according to any one of claims 1 to 6, characterized in that, The magnet is in the shape of a ring or a cylinder.

8. The chord displacement detection mechanism according to any one of claims 1 to 6, characterized in that, It also includes a support platform, which is disposed below the chord, and the Hall sensor is mounted on the support platform.

9. The chord displacement detection mechanism according to any one of claims 1 to 6, characterized in that, The Hall sensor may be a single sensor or a plurality of sensors, wherein a single Hall sensor is positioned directly opposite the magnet or a plurality of Hall sensors are positioned around the outer periphery of the magnet.

10. The chord displacement detection mechanism according to claim 9, characterized in that, The Hall sensor includes two, one of which is located below the magnet and the other is located to the side of the magnet; or, the two Hall sensors are respectively located on both sides of the magnet.

11. The chord displacement detection mechanism according to claim 9, characterized in that, The minimum distance between the Hall sensor and the magnet is 0.6mm-1.5mm.

12. The chord displacement detection mechanism according to claim 1, characterized in that, The Hall sensor is connected to the string, and the Hall sensor is connected to the sensor control unit via a flexible electrical connector.

13. An electronic stringed instrument, characterized in that, The instrument includes a body and a string displacement detection mechanism as described in any one of claims 1 to 12, wherein the string displacement detection mechanism is mounted on the body.

14. The electronic stringed instrument according to claim 13, characterized in that, It also includes a string vibration detection mechanism, wherein the string has an upper end and a lower end, the Hall sensor is located to the side of one of the upper or lower ends of the string, and the string vibration detection mechanism is located to the side of the other end of the string.

15. A method for controlling the sound production of an electronic stringed instrument, characterized in that, The control method using the chord displacement detection mechanism according to any one of claims 1 to 14 includes the following steps: Acquire magnetic field information collected by a Hall sensor, the magnetic field information including the change in magnetic field generated by the magnet or Hall sensor connected to the string swinging in the non-axial direction of the string when the string is plucked; The corresponding sound effect is output based on the magnetic field information.

16. The sound control method for an electronic stringed instrument according to claim 15, characterized in that, The control method further includes the following steps: The magnetic flux change collected by the Hall sensor is acquired, and based on the magnetic flux change collected by the Hall sensor, the string-plucking action that is close to or far from the Hall sensor is identified.

17. The sound control method for an electronic stringed instrument according to claim 15, characterized in that, The Hall sensors are respectively located below and to the side of the magnet, and the control method further includes the following steps: The change in magnetic flux detected by the Hall sensor on the side increases or decreases, and the left or right plucking motion is identified based on the change in magnetic flux detected by the Hall sensor on the side; or, The increase or decrease of magnetic flux collected by the Hall sensor below is obtained, and the string-beating or string-hooking action is identified based on the change of magnetic flux collected by the Hall sensor below.

18. A method for controlling the sound production of an electronic stringed instrument, characterized in that, The control method for the electronic stringed instrument according to claim 14 includes the following steps: Acquire magnetic field information collected by a Hall sensor, the magnetic field information including the change in magnetic field generated by the magnet or Hall sensor connected to the string swinging in the non-axial direction of the string when the string is plucked; Determine whether the string is plucked correctly based on the magnetic field information; If it is determined to be a normal plucking, obtain the string vibration information collected by the string vibration detection mechanism; The string plucking force is determined based on the vibration information. The corresponding sound effect is output according to the force of the plucking.

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