Inflexion system for harp and use method of inflexion system

Abstract

The invention discloses an inflexion system for a harp, which comprises the harp, a plurality of inflexion columns are arranged on one side of the harp, strings are wound on the peripheries of the inflexion columns, an inflexion plate sleeve is arranged on one side of the harp, and an inflexion plate is movably connected to one side of the inflexion plate sleeve. One side of the inflexion plate is fixedly provided with an inflexion seat for rotation adjustment of the inflexion column, the inflexion plate is internally and fixedly provided with a coordination module, and the coordination module is used for intonation correction of strings. According to the invention, the motor is driven to rotate through intelligent analysis of the coordination module, the rotation of the inflexion angle seat is adjusted through the friction rotating wheel, the angle sensor and the friction rotating seat after the motor rotates, and the rotation of the inflexion column can be quickly realized, so that the tightness of the string can be adjusted, the inflexion adjustment operation of the string can be realized, the adjustment effect is good, and the adjustment efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of harp pitch changing, in particular to a harp pitch changing system and a use method thereof. Background Art

[0002] The harp is a string instrument, usually with 48 strings on an upright triangular frame (the most common is 47 strings, including 6 octaves plus a group of highest notes do, re, mi, fa, sol). The performer produces music by plucking these strings. The harp has a beautiful tone, a loud volume, and rich expressiveness. It can play melodies, harmonies, and a variety of complex musical textures. It is an important instrument in symphony orchestras, chamber orchestras, and solos.

[0003] Harp tuning is an integral part of harp playing. In order to better distinguish each note from C to F, all C strings on harps are red and all F strings are blue. The treble and mid-range of the harp usually use nylon or long strings, whose stretch and characteristics make it easy to get out of tune when tuning. The tuning method varies depending on the type of harp, but generally a tuner can be used for tuning.

[0004] When tuning, harp players usually wear a pair of headphones connected to a special tuning device, which can help harp players hear the required sound more accurately and make tuning more convenient and quick. When tuning, the pegs should be moved slowly and the strings should be gradually adjusted to the correct pitch.

[0005] Since the string board tunes the strings one by one during tuning, a single harp requires a lot of time to tune, which cannot meet the needs of batch tuning in factories, music shops, etc., and there is room for improvement. Summary of the invention

[0006] The object of the present invention is to provide a harp tuning system and a method of using the same to solve the problems mentioned in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tuning system for a harp, comprising a harp, wherein a plurality of tuning posts are arranged on one side of the harp, strings are wound around the outer circumference of the tuning posts, a tuning board cover is arranged on one side of the harp, a tuning board is movably connected to one side of the tuning board cover, a tuning seat for rotational adjustment of the tuning posts is fixedly installed on one side of the tuning board, a coordination module is fixedly installed inside the tuning board, and the coordination module is used for pitch correction of the strings.

[0008] A harp pitch changing system and a method of using the same, comprising:

[0009] Step S1: Sleeve the tone plate cover on the outside of the harp and adsorb and install the tone plate cover and the harp through a supporting member;

[0010] Step S2: Move the position of the tone changing plate through the ball screw nut pair and the sliding fit, so that the through hole is sleeved on the outside of the tone changing column, and the tone changing angle seat is clamped at the end of the tone changing column;

[0011] Step S3: The coordination module records the sound wave data collected by the plucking of the strings during the sound test operation, and analyzes the accurate sound wave data according to the position of the strings;

[0012] Step S4: Continuously plucking the strings to calibrate the phase difference between the collected sound wave data and the standard sound wave data;

[0013] Step S5: the coordination module analyzes the angle that the motor output end should rotate, and the motor output end rotates so that the pitch-changing angle seat drives the pitch-changing column to rotate, thereby achieving adjustment;

[0014] Step S6: During the process, the angle sensor detects the rotation angle of the motor.

[0015] As a further solution of the present invention: a tone changing system for a harp also includes a supporting member, the supporting member includes a driving gear, a rack, a connecting frame, a swinging frame and a suction cup, the driving gear is rotatably connected to the tone changing plate sleeve, the rack is meshingly connected to the driving gear, the connecting frame is fixedly connected to the rack, the swinging frame is hinged to the connecting frame through a hinge, the swinging frame is fixedly connected to the suction cup, and the suction cup is movably connected to the harp.

[0016] As a further solution of the present invention: a tuning system for a harp, the tuning seat includes a tuning angle seat, a friction rotating seat, a rotating cavity, a friction wheel and an angle sensor, the tuning angle seat is fixedly connected to the friction rotating seat, the rotating cavity is opened inside the tuning seat, one end of the friction rotating seat away from the tuning angle seat is adapted to the rotating cavity, a motor is fixedly mounted on one side of the tuning seat, the output end of the motor passes through the tuning seat and is fixedly connected to the friction wheel, the outer edge of the friction wheel passes through the wheel cavity and the rotating cavity and is expansion-connected to the friction rotating seat, and the angle sensor is fixedly mounted on one end of the friction wheel and is used for adjusting and measuring the angle of the friction wheel.

[0017] As a further solution of the present invention: a tone changing system for a harp, wherein a movable cavity is opened inside the tone changing plate cover, a ball screw nut pair and a sliding fit are arranged inside the movable cavity, a connecting seat is fixedly installed at one end of the ball screw nut pair and the sliding fit, and the connecting seat is fixedly connected to the tone changing plate.

[0018] As a further solution of the present invention: a tuning system for a harp, wherein a through hole is opened inside the tuning plate, and the through hole, the tuning angle seat, the friction swivel seat and the rotating cavity are all concentrically arranged, an in-position sensor is arranged at one end of one side of the through hole, and a spring piece is fixedly installed at the other end of the through hole, the in-position sensor is used for detecting the in-position of the tuning post and the strings, and the spring piece is used for limiting the position of the tuning post.

[0019] As a further solution of the present invention: a tuning system for a harp, the ball screw nut pair includes a screw and a nut, the sliding pair includes a sliding rod and a sliding seat, both ends of the screw are rotatably connected to the movable cavity, the nut is movably connected to the screw, both ends of the sliding rod are fixedly connected to the movable cavity, the sliding seat is movably connected to the sliding rod, and the nut and the sliding seat are fixedly connected to the connecting seat.

[0020] As a further solution of the present invention: a tone changing system for a harp, wherein a mounting frame is fixedly installed inside the tone changing plate cover, a knob is rotatably connected inside the mounting frame, and one end of the knob is fixedly connected to the driving gear.

[0021] As a further solution of the present invention: a tuning system for a harp, the coordination module includes a sound absorbing unit, a judgment unit and a phase changing unit, the sound absorbing unit is used to absorb the sound source when the strings are plucked, the judgment unit is used for sound source analysis, and the phase changing unit is electrically connected to the motor and is used for motor adjustment.

[0022] As a further solution of the present invention: a tuning system for a harp, the angle sensor, the motor and the mating cavity are all electrically connected to an external power supply.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Through the intelligent analysis of the coordination module to drive the motor to rotate, after the motor rotates, the rotation of the pitch angle seat is adjusted through the friction wheel, angle sensor and friction seat, so that the rotation of the pitch column can be quickly realized, thereby adjusting the tightness of the strings and realizing the pitch adjustment of the strings, with good adjustment effect and high adjustment efficiency.

[0025] 2. The position of the suction cup can be adjusted by rotating the active gear to drive the rack to move. The swing frame is hinged to the connecting frame through a hinge. The swing frame is fixedly connected to the suction cup, and the suction cup is movably connected to the harp. Therefore, the angle of the swing frame can be adjusted through the hinge, thereby enhancing the adsorption strength between the suction cup and the harp, improving the connection strength between the tone plate cover and the harp, and avoiding the problem of the tone plate cover slipping.

[0026] 3. Since a motor is fixedly installed on one side of the pitch change seat, the output end of the motor passes through the pitch change seat and is fixedly connected to the friction wheel, and the outer edge of the friction wheel passes through the rotating cavity and is expanded with the friction seat. Therefore, the output end of the motor rotates to drive the friction wheel to rotate, and the friction wheel then drives the friction seat inside the rotating cavity to rotate, and the friction seat then drives the clamped pitch change column to rotate, which can adjust the tightness of the strings. The angle sensor is fixedly installed on one end of the friction wheel and provides angle adjustment measurement for the friction wheel. Therefore, the angle sensor can determine the angle of equal rotation of the pitch change seat through the angle of rotation of the friction wheel, thereby recording the pitch of the string at that location, which can improve the speed of pitch adjustment in subsequent pitch change links.

[0027] 4. Since a through hole is opened inside the tone change plate, the through hole, the tone change angle seat, the friction seat and the rotating cavity are all concentrically arranged, and an in-position sensor is arranged at one end of one side of the through hole. The in-position sensor is used to detect whether the tone change column and the strings are in place, and a spring piece is fixedly installed at the other end of the through hole. The spring piece is used to clamp the lower half of the tone change column to avoid the problem of the tone change plate and the tone change column loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the overall structure of a harp tone changing system and a method of using the same according to the present invention;

[0029] Figure 2 It is a schematic structural diagram of a tone changing plate, a tone changing plate cover, a tone changing seat and a supporting member in a tone changing system for a harp and a method of using the same according to the present invention;

[0030] Figure 3 It is a structural schematic diagram of a tone changing plate and a tone changing plate cover in a tone changing system for a harp and a method for using the same according to the present invention;

[0031] Figure 4 It is a structural schematic diagram of a tone changing plate cover in a tone changing system for a harp and a method for using the same according to the present invention;

[0032] Figure 5 It is a structural schematic diagram of a tone changing seat in a tone changing system for a harp and a method for using the same according to the present invention;

[0033] Figure 6 It is a structural schematic diagram of a supporting member in a harp tone changing system and a method of using the same according to the present invention;

[0034] Figure 7 A harp tone changing system and a method of using the same Figure 1 The enlarged view of point A in the middle;

[0035] Figure 8 A harp tone changing system and a method of using the same Figure 5 The enlarged view of point B in the middle;

[0036] Fig. 9 A schematic diagram of a process flow of a harp tone changing system and a method of using the same according to the present invention;

[0037] In the figure: 1. harp; 11. tone change column; 12. strings; 2. tone change board; 21. through hole; 22. plug-in cavity; 23. in-position sensor; 24. spring; 3. tone change board sleeve; 31. movable cavity; 32. ball screw nut pair; 321. screw; 322. nut; 33. sliding fit; 331. slide rod; 332. slide seat; 34. connecting seat; 4. tone change seat; 41. tone change angle seat; 42. friction rotating seat; 43. rotating cavity; 44. friction rotating wheel; 45. angle sensor; 46. rotating wheel cavity; 47. motor; 5. support; 51. driving gear; 52. rack; 53. connecting frame; 54. swing frame; 55. suction cup; 56. hinge; 57. knob; 58. mounting frame. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0040] In the embodiment of the present invention, please refer to Figure 1 , Figure 2 and Figure 7A harp tuning system includes a harp 1, wherein a plurality of tuning posts 11 are arranged on one side of the harp 1, and strings 12 are wound around the outer periphery of the tuning posts 11, and the tuning posts 11 can rotate and adjust the tightness of the strings 12, thereby adjusting the timbre and pitch of the strings 12, and a tuning plate sleeve 3 is arranged on one side of the harp 1, and a tuning plate 2 is movably connected to one side of the tuning plate sleeve 3, and in actual use, the tuning plate 2 can be sleeved on the outer side of the tuning post 11, and a tuning seat 4 for rotating and adjusting the tuning post 11 is fixedly installed on one side of the tuning plate 2, so that after the tuning plate 2 is sleeved on the outer side of the tuning post 11, the tuning seat 4 can be used to fix the tuning post 11, and the strings 1 can be adjusted by driving the tuning seat 4. 2 to achieve the tone changing operation. A coordination module is fixedly installed inside the tone changing board 2. The coordination module is used for pitch correction of the strings 12. The coordination module includes a sound absorbing unit, a judgment unit and a phase changing unit. The sound absorbing unit is used to absorb the sound source when the strings 12 are plucked, and the judgment unit is used for sound source analysis. The phase changing unit is electrically connected to the motor 47 and is used for adjustment by the motor 47. Therefore, the motor 47 is driven to rotate through the intelligent analysis of the coordination module. After the motor 47 rotates, the rotation of the tone changing angle seat 41 is adjusted through the friction wheel 44, the angle sensor 45 and the friction rotating seat 42, so that the rotation of the tone changing column 11 can be quickly realized, thereby adjusting the tightness of the strings 12 and realizing the tone changing adjustment operation of the strings 12.

[0041] See also Fig. 9 , a harp tone changing system and a method of using the same, comprising:

[0042] Step S1: Sleeve the tone plate cover 3 onto the outside of the harp 1 and install the tone plate cover 3 and the harp 1 by adsorption through the support 5;

[0043] Step S2: Move the position of the sound changing plate 2 through the ball screw nut pair 32 and the sliding fitting 33 so that the through hole 21 is sleeved on the outside of the sound changing column 11 and the sound changing angle seat 41 is clamped at the end of the sound changing column 11;

[0044] Step S3: the coordination module records the sound wave data collected by the plucking of the string 12 during the sound test operation, and analyzes the accurate sound wave data according to the position of the string 12;

[0045] Step S4: Continuously plucking the strings 12 to calibrate the phase difference between the collected sound wave data and the standard sound wave data;

[0046] Step S5: the coordination module analyzes the angle at which the output end of the motor 47 should rotate, and the output end of the motor 47 rotates so that the pitch-changing angle seat 41 drives the pitch-changing column 11 to rotate, thereby achieving adjustment;

[0047] Step S6: During the process, the angle sensor 45 checks the rotation angle of the motor 47.

[0048] Other embodiments of the present invention: please refer to Figure 2 and Figure 6 , also includes a supporting member 5, the supporting member 5 includes a driving gear 51, a rack 52, a connecting frame 53, a swinging frame 54 and a suction cup 55, the interior of the tone plate cover 3 is fixedly installed with a mounting frame 58, the interior of the mounting frame 58 is rotatably connected with a knob 57, one end of the knob 57 is fixedly connected to the driving gear 51, the driving gear 51 is rotatably connected to the tone plate cover 3, the rack 52 is meshed with the driving gear 51, the connecting frame 53 is fixedly connected to the rack 52, so the position of the suction cup 55 can be adjusted by rotating the driving gear 51 to drive the rack 52 to move, the swinging frame 54 is hinged to the connecting frame 53 by a hinge 56, the swinging frame 54 is fixedly connected to the suction cup 55, and the suction cup 55 is movably connected to the harp 1, so the angle of the swinging frame 54 can be adjusted by the hinge 56, thereby strengthening the adsorption strength of the suction cup 55 and the harp 1, improving the connection strength between the tone plate cover 3 and the harp 1 and avoiding the problem of the tone plate cover 3 slipping off.

[0049] Other embodiments of the present invention: please refer to Figure 3 , Figure 4 , Figure 5 and Figure 8 The pitch change seat 4 includes a pitch change angle seat 41, a friction rotating seat 42, a rotating cavity 43, a friction rotating wheel 44 and an angle sensor 45. The pitch change angle seat 41 is fixedly connected to the friction rotating seat 42. The rotating cavity 43 is arranged inside the pitch change seat 4. One end of the friction rotating seat 42 away from the pitch change angle seat 41 is adapted to the rotating cavity 43. A motor 47 is fixedly installed on one side of the pitch change seat 4. The output end of the motor 47 passes through the pitch change seat 4 and is fixedly connected to the friction rotating wheel 44. The outer edge of the friction rotating wheel 44 passes through the rotating wheel cavity 46 and the rotating cavity 43 and is expanded with the friction rotating seat 42. Therefore, the output end of the motor 47 rotates to drive the friction rotating wheel 44 to rotate, and the friction rotating wheel 44 then drives the friction rotating seat 42 inside the rotating cavity 43 to rotate, and the friction rotating seat 42 then drives the clamped pitch change column 11 to rotate, so that the tightness of the strings 12 can be adjusted;

[0050] In addition, the angle sensor 45 is fixedly mounted on one end of the friction wheel 44 and is used to measure the angle adjustment of the friction wheel 44. Therefore, the angle sensor 45 can determine the angle of equal rotation of the pitch change angle seat 41 through the angle of rotation of the friction wheel 44, thereby recording the pitch position of the string 12 at that location, which can improve the speed of pitch change adjustment in subsequent pitch change links.

[0051] Other embodiments of the present invention: please refer to Figure 2 , Figure 3 and Figure 4The interior of the tone change plate sleeve 3 is provided with an active cavity 31, and the interior of the active cavity 31 is provided with a ball screw nut pair 32 and a sliding match 33, the ball screw nut pair 32 includes a screw 321 and a nut 322, the sliding match 33 includes a slide rod 331 and a slide seat 332, both ends of the screw 321 are rotatably connected to the active cavity 31, the nut 322 is movably connected to the screw 321, both ends of the slide rod 331 are fixedly connected to the active cavity 31, the slide seat 332 is movably connected to the slide rod 331, the nut 322 and the slide seat 332 are fixedly connected to the connecting seat 34, one end of the ball screw nut pair 32 and the sliding match 33 is fixedly installed with a connecting seat 34, and the connecting seat 34 is fixedly connected to the tone change plate 2.

[0052] Other embodiments of the present invention: please refer to Figure 2 and Figure 3 A through hole 21 is provided inside the tone change plate 2, and the through hole 21, the tone change angle seat 41, the friction rotating seat 42 and the rotating cavity 43 are all concentrically arranged. An in-position sensor 23 is provided at one end of one side of the through hole 21, and the angle sensor 45, the motor 47 and the plug-in cavity 22 are all electrically connected to an external power supply. The in-position sensor 23 is used to detect whether the tone change column 11 and the strings 12 are in position. A spring piece 24 is fixedly installed at the other end of one side of the through hole 21, and the spring piece 24 is used to clamp the lower half of the tone change column 11 to avoid the problem of the tone change plate 2 and the tone change column 11 being loosened. The in-position sensor 23 is used for in-position detection of the tone change column 11 and the strings 12, and the spring piece 24 is used for limiting the position of the tone change column 11.

[0053] The working principle of the present invention is: through the intelligent analysis of the coordination module to drive the motor 47 to rotate, after the motor 47 rotates, the rotation of the pitch angle seat 41 is adjusted through the friction wheel 44, the angle sensor 45 and the friction rotating seat 42, so that the rotation of the pitch column 11 can be quickly realized, so that the tightness of the string 12 can be adjusted and the pitch adjustment operation of the string 12 can be realized, and the active gear 51 is rotated to drive the rack 52 to move, so that the position of the suction cup 55 can be adjusted, the swing frame 54 is hinged to the connecting frame 53 through the hinge 56, the swing frame 54 is fixedly connected to the suction cup 55, and the suction cup 55 is movably connected to the harp 1, so the angle of the swing frame 54 can be adjusted through the hinge 56, so as to strengthen the adsorption strength of the suction cup 55 and the harp 1, improve the connection strength between the pitch plate cover 3 and the harp 1 and avoid the problem of the pitch plate cover 3 slipping off; A motor 47 is fixedly installed on one side of the pitch change seat 4, and the output end of the motor 47 passes through the pitch change seat 4 and is fixedly connected to the friction wheel 44, and the outer edge of the friction wheel 44 passes through the rotating cavity 43 and is expanded with the friction seat 42. Therefore, the output end of the motor 47 rotates to drive the friction wheel 44 to rotate, and the friction wheel 44 then drives the friction seat 42 inside the rotating cavity 43 to rotate, and the friction seat 42 then drives the clamped pitch change column 11 to rotate, which can adjust the tightness of the strings 12, and the angle sensor 45 is fixedly installed on one end of the friction wheel 44 and provides angle adjustment measurement for the friction wheel 44. Therefore, the angle sensor 45 can determine the angle of equal rotation of the pitch change angle seat 41 through the angle of rotation of the friction wheel 44, thereby recording the pitch of the string 12 at that location, which can improve the speed of pitch change adjustment in the subsequent pitch change link.

[0054] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A harp pitch changing system, characterized in that: The invention comprises a harp (1), wherein a plurality of tone change columns (11) are arranged on one side of the harp (1), strings (12) are wound around the outer circumference of the tone change columns (11), a tone change plate sleeve (3) is arranged on one side of the harp (1), a tone change plate (2) is movably connected to one side of the tone change plate sleeve (3), a tone change seat (4) for rotationally adjusting the tone change columns (11) is fixedly installed on one side of the tone change plate (2), and a coordination module is fixedly installed inside the tone change plate (2), and the coordination module is used for pitch correction of the strings (12).

2. A harp tone changing system according to claim 1, characterized in that: The harp (5) further comprises a supporting member (5), wherein the supporting member (5) comprises a driving gear (51), a rack (52), a connecting frame (53), a swinging frame (54) and a suction cup (55), wherein the driving gear (51) is rotatably connected to the tone changing plate sleeve (3), the rack (52) is meshingly connected to the driving gear (51), the connecting frame (53) is fixedly connected to the rack (52), the swinging frame (54) is hinged to the connecting frame (53) via a hinge (56), the swinging frame (54) is fixedly connected to the suction cup (55), and the suction cup (55) is movably connected to the harp (1).

3. A harp tone changing system according to claim 2, characterized in that: The tone change seat (4) comprises a tone change angle seat (41), a friction rotating seat (42), a rotating cavity (43), a friction rotating wheel (44) and an angle sensor (45). The tone change angle seat (41) is fixedly connected to the friction rotating seat (42). The rotating cavity (43) is arranged inside the tone change seat (4). One end of the friction rotating seat (42) away from the tone change angle seat (41) is matched with the rotating cavity (43). A motor (47) is fixedly mounted on one side of the tone change seat (4). The output end of the motor (47) passes through the tone change seat (4) and is fixedly connected to the friction rotating wheel (44). The outer edge of the friction rotating wheel (44) passes through the rotating wheel cavity (46) and the rotating cavity (43) and is expanded with the friction rotating seat (42). The angle sensor (45) is fixedly mounted on one end of the friction rotating wheel (44) and is used for angle adjustment and measurement of the friction rotating wheel (44).

4. A harp tone changing system according to claim 3, characterized in that: The interior of the sound change plate sleeve (3) is provided with an active cavity (31), the interior of the active cavity (31) is provided with a ball screw nut pair (32) and a sliding match (33), one end of the ball screw nut pair (32) and the sliding match (33) is fixedly mounted with a connecting seat (34), and the connecting seat (34) is fixedly connected to the sound change plate (2).

5. A harp tone changing system according to claim 4, characterized in that: A through hole (21) is provided inside the tone change plate (2); the through hole (21), the tone change angle seat (41), the friction rotating seat (42) and the rotating cavity (43) are all arranged concentrically; an in-position sensor (23) is arranged at one end of one side of the through hole (21); a spring sheet (24) is fixedly mounted at the other end of one side of the through hole (21); the in-position sensor (23) is used for in-position detection of the tone change column (11) and the strings (12); and the spring sheet (24) is used for limiting the position of the tone change column (11).

6. A harp tone changing system according to claim 5, characterized in that: The ball screw nut pair (32) includes a screw (321) and a nut (322), and the sliding pair (33) includes a slide rod (331) and a slide seat (332). Both ends of the screw (321) are rotatably connected to the movable cavity (31), the nut (322) is movably connected to the screw (321), both ends of the slide rod (331) are fixedly connected to the movable cavity (31), the slide seat (332) is movably connected to the slide rod (331), and both the nut (322) and the slide seat (332) are fixedly connected to the connecting seat (34).

7. A harp tone changing system according to claim 6, characterized in that: A mounting frame (58) is fixedly mounted inside the tone change plate sleeve (3), a knob (57) is rotatably connected inside the mounting frame (58), and one end of the knob (57) is fixedly connected to the driving gear (51).

8. A harp tone changing system according to claim 7, characterized in that: The coordination module comprises a sound absorbing unit, a judgment unit and a phase changing unit. The sound absorbing unit is used to absorb the sound source when the strings (12) are plucked, the judgment unit is used to analyze the sound source, and the phase changing unit is electrically connected to the motor (47) and is adjusted by the motor (47).

9. A harp tone changing system according to claim 8, characterized in that: The angle sensor (45), the motor (47) and the mating cavity (22) are all electrically connected to an external power source.

10. A harp tone changing system and a method of using the same according to claim 9, characterized in that: include Step S1: Sleeve the tone change plate cover (3) onto the outside of the harp (1) and install the tone change plate cover (3) and the harp (1) by adsorption through the support member (5); Step S2: Move the position of the sound changing plate (2) through the ball screw nut pair (32) and the sliding fitting (33) and make the through hole (21) sleeved on the outside of the sound changing column (11), and the sound changing angle seat (41) is clamped at the end of the sound changing column (11); Step S3: the coordination module records the sound wave data collected by the plucking of the string (12) during the sound test operation, and analyzes the accurate sound wave data according to the position of the string (12); Step S4: Continuously plucking the strings (12) to calibrate the phase difference between the collected sound wave data and the standard sound wave data; Step S5: the coordination module analyzes the angle at which the output end of the motor (47) should rotate, and the output end of the motor (47) rotates so that the pitch-changing angle seat (41) drives the pitch-changing column (11) to rotate, thereby achieving adjustment; Step S6: During the process, the angle sensor (45) detects the rotation angle of the motor (47).

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