Intelligent tuning method and device for vertical piano

Abstract

The invention relates to the field of piano tuning, and discloses an intelligent tuning method and device for a vertical piano, and the method comprises the steps: knocking keys, enabling a recorder to record the sound of strings, and converting the sound into an audio signal; standard audio signals of each string are stored in the melody comparator, the audio signals recorded by the recorder are compared with the standard audio signals, and torque values of tuning pegs corresponding to the strings are obtained through calculation; sending the torque value to a controller; the controller rotates the tuning peg according to the torque value; the keys are knocked again, whether the audio reaches the standard audio signal or not is compared, if yes, a pitch standard prompt is sent, and if not, the torque value of the tuning peg corresponding to the string is calculated again, and the tuning peg is rotated till the standard audio signal is reached. According to the invention, automatic recording comparison is realized, then the number of turns of the tuning pegs is automatically adjusted, and each string is accurately and rapidly adjusted in place so as to reach a preset pitch standard and ensure the accuracy and consistency of tone quality.

Description

Technical Field

[0001] The present application relates to the field of piano tuning, and in particular to an intelligent tuning method and device for an upright piano. Background Art

[0002] The piano's sound is mainly achieved through the vibration of the strings. The upper end of the string is hung on the peg, and the lower end is hung on the pin. The peg is threaded on the pegboard. When the pitch is not accurate, you can put the tuning board on the peg and turn the peg to change the tension of the string, thereby tuning the piano.

[0003] However, in the process of implementing relevant technical solutions, it was found that at least the following technical problems exist: a piano has more than 200 tuning pegs. For piano manufacturers or individuals, using independent tuning pegs to tune each string on a large scale is slow and inefficient, and manual tuning with a tuning peg is more subjective. In addition, with more than 200 tuning pegs on each piano, the accuracy and consistency of the sound quality are difficult to guarantee. Summary of the invention

[0004] The present application provides an intelligent tuning method and device for an upright piano, which solves the technical problem in the prior art of using independent tuning wrenches to tune each string on a large scale, which is slow and inefficient. The application realizes automatic recording and comparison, and then automatically adjusts the number of turns of the tuning pegs, so that each string can be accurately and quickly selected and adjusted to the desired pitch standard, thereby ensuring the accuracy and consistency of the sound quality.

[0005] The present application provides an intelligent tuning device for an upright piano, comprising: a plurality of micro high-torque motors, which are respectively sleeved on each string axis in a string axis plate, the string axis plate being provided with a threaded hole, the string axis being threadedly connected in the threaded hole, and the micro high-torque motor being used to drive the string axis to rotate at a low speed; a motor mounting plate, which is parallel and fixedly connected to the string axis plate, and the motor mounting plate is provided with a plurality of connectors for fixedly mounting the micro high-torque motor; a recorder, which is used to receive the sound of string vibration and convert it into an audio signal; a temperament comparator, which is used to receive the audio signal from the recorder, compare the audio signal with the standard audio signal stored in the temperament comparator, and calculate the torque value of the string corresponding to the string axis; a controller, each of the micro high-torque motors is connected to the controller signal, the controller obtains the torque value obtained by the temperament comparator, and controls the micro high-torque motor to rotate the string axis.

[0006] Furthermore, the connector includes: a plug-in ring, which is molded on the surface of the motor mounting plate, and the surface of the motor mounting plate is provided with a through hole concentric with the plug-in ring, the diameter of the through hole is smaller than the inner diameter of the plug-in ring, and the portion between the inner circumference of the plug-in ring and the through hole in the surface of the motor mounting plate is formed as a limit table; clamping ribs, which are molded on the inner circumference of the plug-in ring, and the clamping ribs are arranged in pairs and multiple pairs, and the gap between two clamping ribs is formed as a clamping groove; wherein a collar is fixed to the outer wall of the micro high-torque motor, and an insert block is molded on the outer wall of the collar, and the insert block is used to be inserted into the clamping groove, and the clamping groove and the insert block are interference fit, and the collar contacts the limit table, and the rotating sleeve of the micro high-torque motor passes through the through hole on the surface of the motor mounting plate and is sleeved on the chord axis.

[0007] Furthermore, the connector also includes a limiting ring cover, which covers the top surface of the plug-in ring, and the limiting ring cover and the plug-in ring are detachably connected. When the ring on the outer wall of the micro high-torque motor abuts against the limiting platform, the limiting ring cover abuts against the plug-in block on the outer wall of the ring.

[0008] Furthermore, a threaded cylinder is formed on the inner wall of the plug-in ring, and a connecting bolt is inserted into the limiting ring cover for threaded connection with the threaded cylinder.

[0009] The present application also provides an upright piano intelligent tuning method, which uses the above-mentioned upright piano intelligent tuning device, and the tuning method includes the following steps: striking the keys so that a recorder records the sound of the strings and converts it into an audio signal; a pitch comparator stores a standard audio signal of each string, compares the audio signal recorded by the recorder with the standard audio signal, and calculates the torque value of the string axis corresponding to the string; sends the torque value to a controller; the controller rotates the string axis according to the torque value; striking the keys again to compare whether the audio reaches the standard audio signal, and if so, sends a pitch standard prompt, and if not, calculates the torque value of the string axis corresponding to the string again and rotates the string axis until the standard audio signal is reached.

[0010] Furthermore, the method for calculating the torque value of the string corresponding to the string axis includes the steps of: setting a string audio signal torque table, whether it is a standard audio signal or not, there is a corresponding torque value in the torque table; setting a torque standard value for the standard audio signal of each string; obtaining the recorded audio signal corresponding to the torque table to obtain a torque calculation value; the difference between the torque calculation value and the torque standard value is the torque value of the string corresponding to the string axis.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0012] 1: Due to the use of a tuning device, you only need to strike the keys to record, analyze, compare, and adjust the string axis. There is no need to use an independent wrench to rotate the string axis. In addition, you can record, analyze, compare, and adjust the string axis repeatedly, realizing information-based self-monitoring, recording, and feedback. The algorithm control is used to realize automatic adjustment of the piano string axis to achieve the predetermined pitch standard.

[0013] 2: When installing the micro high-torque motor, insert the collar of the micro high-torque motor into the plug-in ring, insert the plug-in block on the collar into the clamping groove of the plug-in ring, and make the bottom surface of the collar touch the limit table. Then, cover the limit ring cover to the top surface of the plug-in ring, and fix the limit ring cover to the top surface of the plug-in ring with connecting bolts. At this time, the bottom surface of the collar on the outer wall of the micro high-torque motor touches the limit table, and the plug-in block on the collar also touches the lower bottom surface of the limit ring cover. As a result, the micro high-torque motor can be fixed very firmly in the plug-in ring, thereby reducing the precision error of the micro high-torque motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of an intelligent tuning device for an upright piano in an embodiment of the present application;

[0015] Figure 2 for Figure 1 The schematic diagram of the middle part structure mainly shows the overall structural diagram of the micro high torque motor fixed by the connector;

[0016] Figure 3 This is a schematic diagram of the overall structure of a micro high-torque motor and a chord axis in an embodiment of the present application;

[0017] Figure 4 for Figure 2 The schematic diagram of the middle part structure mainly illustrates the structure of the connector;

[0018] Figure 5 This is a flow chart of an intelligent tuning method for an upright piano in an embodiment of the present application;

[0019] Figure 6 This is a flow chart of a method for calculating the chord axis torque value in an embodiment of the present application;

[0020] In the figure: 100, peg plate; 101, threaded hole; 200, peg; 1, micro high torque motor; 11, collar; 111, plug block; 12, rotating sleeve; 2, motor mounting plate; 201, through hole; 202, limit table; 203, clamping groove; 21, connector; 211, plug ring; 212, clamping rib; 213, limit ring cover; 2131, connecting bolt; 214, threaded cylinder; 3, recorder; 4, pitch comparator; 5, controller. DETAILED DESCRIPTION

[0021] The embodiment of the present application discloses an intelligent tuning method and device for an upright piano. By striking the keys, a recorder 3 records the sound of the strings and converts it into an audio signal. The pitch comparator 4 compares the audio signal recorded by the recorder 3 with the standard audio signal, calculates the torque value of the string corresponding to the string axis 200, and sends the torque value to the controller 5. The controller 5 rotates the string axis 200 according to the torque value, strikes the keys again, and compares whether the audio reaches the standard audio signal. If it reaches, a pitch standard prompt is sent. If not, the torque value of the string corresponding to the string axis 200 is calculated again and the string axis 200 is rotated until the standard audio signal is reached. During the entire piano tuning process, there is no need to use an independent wrench to rotate the string axis 200, and the tension of each string can be accurately adjusted to reach the predetermined pitch standard, ensuring the accuracy and consistency of the sound quality.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Embodiment 1

[0024] The present application provides an intelligent tuning device for an upright piano, referring to Figure 1 The tuning device includes a micro high-torque motor 1, a motor mounting plate 2, a recorder 3, a music tempo comparer 4, and a controller 5. The tuning device is mounted on a peg board 100. The peg board 100 is provided with a plurality of threaded holes 101. The threaded holes 101 are divided into two areas. One side of the peg board 100 is located in the treble area, and the other side is the bass area. There is an unperforated area between the treble area and the bass area. The unperforated area is used to install the recorder 3, the music tempo comparer 4 and the controller 5. The motor mounting plate 2 is provided with a plurality of threaded holes 101. The threaded holes 101 are divided into two areas. The peg board 10 ... The mounting plate 2 is provided with two pieces, which are respectively located in the high-pitch area (not shown) on one side and the low-pitch area on the other side. A string axis 200 is threadedly connected in each threaded hole 101. One end of the string is hung on the string axis 200. The tension of the string can be changed by rotating the string axis 200. The tuning device is located on the side of the string axis 200 protruding from the surface of the string axis plate 100. The micro high-torque motor 1 is installed on the motor mounting plate 2, and the micro high-torque motor 1 drives the string axis 200 to rotate at a low speed.

[0025] Continue to refer to Figure 1, the micro high torque motor 1 can be a micro planetary gear reduction motor. The micro planetary gear reduction motor is a motor that can output a large torque in a small volume. This motor usually adopts high-efficiency and high-performance design and manufacturing technology to achieve a large torque output in a small volume. There are several micro high torque motors 1, and each string axis 200 is correspondingly sleeved with a micro high torque motor 1. Each micro high torque motor 1 is connected to the controller 5 signal, and the controller 5 controls the rotation of each micro high torque motor 1. The recorder 3 is used to receive the sound of the vibration of the string and convert it into an audio signal. The pitch comparator 4 is used to receive the audio signal from the recorder 3, compare the audio signal with the standard audio signal stored in the pitch comparator 4, and calculate the torque value of the string corresponding to the string axis 200, and send the torque value to the controller 5.

[0026] Reference Figure 2 , Figure 3 as well as Figure 4 The motor mounting plate 2 is parallel to and fixedly connected to the peg plate 100. The motor mounting plate 2 is provided with a plurality of connectors 21 for fixing and installing the micro high torque motor 1. The connectors 21 are integrally formed on the side of the motor mounting plate 2 away from the peg plate 100. The connector 21 includes a plug-in ring 211, a clamping rib 212, a limit ring cover 213, and a threaded cylinder 214. The plug-in ring 211 is annular and has a right triangle cross section. The plug-in ring 211 is formed on the surface of the motor mounting plate 2, and a through hole 201 concentric with the plug-in ring 211 is provided on the surface of the motor mounting plate 2. The diameter of the through hole 201 is smaller than the inner diameter of the plug-in ring 211. The inner circumference of the plug-in ring 211 on the surface of the motor mounting plate 2 and the through hole 201 are spaced apart. Part of it is formed into a limit platform 202, which is a truncated table. A ring 11 is fixed to the outer wall of the micro high torque motor 1. After the micro high torque motor 1 is inserted into the plug-in ring 211, the bottom surface of the ring 11 contacts the limit platform 202, and the rotating sleeve 12 of the micro high torque motor 1 passes through the through hole 201 on the surface of the motor mounting plate 2 and is sleeved on the chord axis 200. When the micro high torque motor 1 is started, it will drive the rotating sleeve 12 to rotate, and then drive the chord axis 200 to rotate.

[0027] Continue to refer to Figure 2 , Figure 3 as well as Figure 4The clamping ribs 212 are formed on the inner circumference of the plug-in ring 211. The clamping ribs 212 are arranged in pairs and are parallel to each other. The clamping ribs 212 arranged in pairs are arranged in multiple pairs and are evenly distributed along the circumference of the plug-in ring 211. The gap between the two clamping ribs 212 forms a clamping groove 203, and the top surface of the clamping rib 212 is coplanar with the top surface of the plug-in ring 211. The outer wall of the ring 11 is formed with an insert block 111, which is used to be inserted into the clamping groove 203, and the clamping groove 203 and the insert block 111 are interference fit. When the micro high torque motor 1 is inserted into the plug-in ring 211, the insert block 111 on the micro high torque motor 1 can be inserted into the clamping groove 203 of the plug-in ring 211, so that the micro high torque motor 1 can be stably fixed on the plug-in ring 211. The limiting ring cover 213 is in the shape of an annular thin plate. The limiting ring cover 213 is used to cover the top surface of the plug-in ring 211. The inner wall of the plug-in ring 211 is formed with a threaded cylinder 214. There are multiple threaded cylinders 214 and they are evenly distributed around the plug-in ring 211. The limiting ring cover 213 is inserted with connecting bolts 2131, which are used to be threadedly connected with the threaded cylinder 214.

[0028] When installing the micro high torque motor 1, first remove the limit ring cover 213 from the plug ring 211, then pass the rotating sleeve 12 of the micro high torque motor 1 through the limit ring cover 213, the plug ring 211 and the through hole 201 of the motor mounting plate 2 in sequence, then insert the collar 11 of the micro high torque motor 1 into the plug ring 211, insert the plug block 111 on the collar 11 into the clamping groove 203 of the plug ring 211, and make the bottom surface of the collar 11 contact the limit table 202, then Cover the limiting ring cover 213 to the top surface of the plug-in ring 211, and then use the connecting bolts 2131 to fix the limiting ring cover 213 on the top surface of the plug-in ring 211. At this time, the bottom surface of the ring 11 on the outer wall of the micro high-torque motor 1 is in contact with the limiting platform 202, and the plug block 111 on the ring 11 is also in contact with the lower bottom surface of the limiting ring cover 213. As a result, the micro high-torque motor 1 can be very firmly fixed in the plug-in ring 211, so that the precision error of the micro high-torque motor 1 is reduced.

[0029] Embodiment 2

[0030] The present application also provides an intelligent tuning method for an upright piano, referring to Figure 5 As shown, the method comprises the following steps:

[0031] S1, strike the keys.

[0032] In a specific implementation, the tuner can strike the keys that need to be tuned with hands or instruments.

[0033] S2, recording.

[0034] In a specific implementation, after the tuning device is started, the recorder 3, the pitch comparator 4, the controller 5, and the micro high-torque motor 1 are all started. Therefore, when the keys are struck, the recorder 3 will record the sound produced by the strings, and the sound recorded by the recorder 3 will be converted into an audio signal, which will then be sent to the pitch comparator 4.

[0035] S3, audio comparison.

[0036] In a specific implementation, the pitch comparator 4 receives the audio signal emitted by the recorder. The pitch comparator 4 includes a memory and a chip, wherein the memory stores the standard audio signal of each string. The chip is used to compare the audio signal recorded by the recorder 3 with the standard audio signal to see whether the audio reaches the standard audio signal. If so, a pitch standard prompt is sent to end the tuning. If not, step S4 is continued.

[0037] S4, calculate the torque value.

[0038] In a specific implementation, the method for calculating the torque value of the string corresponding to the peg 200 includes the following steps:

[0039] S41, setting the torque table.

[0040] In a specific implementation, a string audio signal torque table is set, and whether it is a standard audio signal or not, there is a corresponding torque value in the torque table.

[0041] S42, setting the torque standard value.

[0042] In a specific implementation, a standard torque value is set for the standard audio signal of each string.

[0043] S43, obtaining a torque calculation value.

[0044] In a specific implementation, the recorded audio signal is obtained and corresponds to the torque table to obtain a torque calculation value.

[0045] S44, obtaining the torque value of the string axis.

[0046] In a specific implementation, the difference between the calculated torque value and the standard torque value is the torque value of the string corresponding to the peg 200 .

[0047] In a specific implementation, the torque value calculated by the music comparator 4 will eventually be sent to the controller 5 .

[0048] S5, peg rotation.

[0049] In a specific implementation, after the controller 5 receives the torque value sent by the pitch comparator 4 , the controller 5 controls the corresponding micro high-torque motor 1 of the string to start, so as to rotate the string axis 200 .

[0050] S6, hit the keys again to compare the audio.

[0051] In a specific implementation, the key that was struck last time is struck again. After the striking, the recorder 3 records the sound, and the pitch comparator 4 compares the audio to see if it reaches the standard audio signal. If it reaches it, a pitch standard prompt is sent. If it does not reach it, the torque value of the string corresponding to the string axis 200 is calculated again and the string axis 200 is rotated until the standard audio signal is reached.

[0052] The present application is electrically connected to the controller 5 through a number of electric micro high-torque motors 1. Recording, analysis, comparison, and adjustment of the pegs can be achieved by simply striking the keys. There is no need to use an independent wrench to rotate the pegs 200. The recording, analysis, comparison, and adjustment of the pegs can be repeated many times to achieve information-based self-monitoring, recording, and feedback. In addition, one-touch tuning can be activated to accurately and quickly rotate each peg 200 to a preset depth, so that each string can be adjusted into place and the tension of each string can be accurately adjusted to achieve a predetermined pitch standard, thereby ensuring the accuracy and consistency of the sound quality.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

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

Claims

1. An intelligent tuning device for an upright piano, characterized in that: include: A plurality of micro high-torque motors (1) are provided and are respectively sleeved on the respective chord axes (200) in the chord axis plate (100); a threaded hole (101) is provided on the chord axis plate (100); the chord axes (200) are threadedly connected in the threaded hole (101); and the micro high-torque motors (1) are used to drive the chord axes (200) to rotate at a low speed; A motor mounting plate (2) parallel to and fixedly connected to the peg plate (100), wherein the motor mounting plate (2) is provided with a plurality of connectors (21) for fixedly mounting the micro high-torque motor (1); A recorder (3) for receiving the sound of the vibrating strings and converting it into an audio signal; A temperament comparator (4) is used to receive the audio signal from the recorder (3), compare the audio signal with a standard audio signal stored in the temperament comparator (4), and calculate the torque value of the string corresponding to the string axis (200); A controller (5), each of the micro high-torque motors (1) is connected to the controller (5) by signal, and the controller (5) obtains the torque value obtained by the pitch comparator (4), and controls the micro high-torque motor (1) to rotate the string axis (200).

2. An intelligent tuning device for an upright piano as claimed in claim 1, characterized in that: The plug connector (21) comprises: A plug-in ring (211) is formed on the surface of the motor mounting plate (2), and a through hole (201) concentric with the plug-in ring (211) is provided on the surface of the motor mounting plate (2), the diameter of the through hole (201) is smaller than the inner diameter of the plug-in ring (211), and a portion of the surface of the motor mounting plate (2) between the inner circumference of the plug-in ring (211) and the through hole (201) forms a limit platform (202); Clamping ribs (212) are formed on the inner circumferential surface of the plug-in ring (211), the clamping ribs (212) are arranged in pairs and multiple pairs are arranged, and the gap between the two clamping ribs (212) forms a clamping groove (203); A collar (11) is fixed on the outer wall of the micro high-torque motor (1), and an insert block (111) is formed on the outer wall of the collar (11). The insert block (111) is used to be inserted into the clamping groove (203), and the clamping groove (203) and the insert block (111) are interference-fitted. The collar (11) contacts the limit platform (202), and the rotating sleeve (12) of the micro high-torque motor (1) passes through the through hole (201) on the surface of the motor mounting plate (2) and is sleeved on the string axis (200).

3. An intelligent tuning device for an upright piano as claimed in claim 2, characterized in that: The connector (21) further comprises a limiting ring cover (213), the limiting ring cover (213) covers the top surface of the plug-in ring (211), and the limiting ring cover (213) and the plug-in ring (211) are detachably connected, and when the collar (11) on the outer wall of the micro high-torque motor (1) abuts against the limiting platform (202), the limiting ring cover (213) abuts against the plug-in block (111) on the outer wall of the collar (11).

4. The intelligent tuning device for an upright piano as claimed in claim 3, characterized in that: The inner wall of the plug-in ring (211) is formed with a threaded cylinder (214), and a connecting bolt (2131) is inserted into the limiting ring cover (213) and is used for threaded connection with the threaded cylinder (214).

5. An intelligent tuning method for an upright piano, characterized in that: According to any one of claims 1 to 4, an intelligent tuning device for an upright piano is used, wherein the tuning method comprises the steps of: Striking the keys causes the recorder to pick up the sound of the strings and convert it into an audio signal; The pitch comparator stores the standard audio signal of each string, compares the audio signal recorded by the recorder with the standard audio signal, and calculates the torque value of the string corresponding to the string axis; Send the torque value to the controller; The controller rotates the string axis according to the torque value; Strike the keys again and compare whether the audio reaches the standard audio signal. If it does, send a pitch standard prompt. If it does not, calculate the torque value of the string corresponding to the string axis again and rotate the string axis until the standard audio signal is reached.

6. The intelligent tuning method for an upright piano as claimed in claim 5, characterized in that: The method for calculating the torque value of the string corresponding to the string axis includes the following steps: Set the string audio signal torque table, whether it is a standard audio signal or not, there is a corresponding torque value in the torque table; A standard torque value is set for the standard audio signal of each string; Obtain the recorded audio signal corresponding to the torque table and obtain a torque calculation value; The difference between the calculated torque value and the standard torque value is the torque value of the string corresponding to the string axis.

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