KR102442903B1 - Automatic self identification system and method for slave board in digital piano - Google Patents

Abstract

As a system for automatically recognizing a slave board of a digital piano, the present invention provides the system comprising: a master board; and a plurality of slave boards connected in series, wherein the system enables each control part to be installed on each of the slave boards, enables a semiconductor element connected to each control part to be installed on each slave board, enables each semiconductor element to be connected by a line connected in series to show a unique physical property to each slave board, and enables each slave board to automatically recognize its unique code by reading the physical property. Therefore, the present invention is capable of exhibiting an effect for which processing of the data is prompt and reasonable.

Description

Automatic self identification system and method for slave board in digital piano

The present invention relates to a system and method for automatic recognition of a slave board connected to a master board in a digital piano.

A digital piano is a type of keyboard designed as an alternative to the traditional piano playing method and sound. This piano provides an accurate simulation of an acoustic piano (analog piano). Digital pianos are designed to look like regular pianos, such as upright pianos or grand pianos. The sound of the digital piano is made by using synthetic emulation or real piano samples to match the stored sound with the position of the touched key, and then transmit the stored sound through the speaker. The digital piano has three types of keys: 88, 76, and 61, but 88 keys (keys) are mainly used.

Compared to an acoustic piano, a digital piano has a lower maintenance cost, a sound is implemented in MIDI, a built-in function to help learning and composing, no need to use a microphone, and easy to carry. The keys of a digital piano are manufactured to give a feeling similar to that of an acoustic piano, and because they are speed-responsive, the volume and timbre of the played sound depend on the speed of the keys. A digital piano has a hammer to give it the touch of a real piano. There is an analog sensor to detect a key press, which is different from a typical electronic keyboard or synthesizer. Some digital pianos have built-in pedals, but it is very expensive to have the ability to adjust the damper by pressing the pedal for resonance like an acoustic piano.

Patent No. 10-1014809 proposes a keyboard structure of a digital piano. As shown in FIG. 1, the keyboard structure of the digital piano includes a frame 120' in which a keyboard 130' is accommodated, a hammer 140' and a hammer 140' that are rotatably installed on the keyboard 130'. ) is composed of a rubber switch (Rubber Switch, 150') installed adjacent to the pivot point. The keyboard module consists of one octave as one module and is arranged side by side at regular intervals to form 7 octaves.

Looking at the current electronic structure of the digital piano, as shown in FIG. 2, n number of slave boards (S') installed corresponding to a plurality of keys are arranged from 1 to n, and each slave board ( It has a structure in which S1', S2', ...Sn') are connected in series and this is connected to one master board (M'). When a key is pressed, the master board (M') identifies the unique code of the slave board having jurisdiction over the pressed key and the keyboard unique code transmitted by the slave board, reads the corresponding sound from the memory, and through the volume transmitter Output to an external output device.

However, according to this method, there is a disadvantage in that the load increases because the master board M' must identify both the slave board on which the key is pressed and the unique code of the key. Also, when the digital piano is played, only the position of the keyboard changes on the same slave board in many cases. Even in this case, it is inefficient for the master board to recognize the slave board again from the beginning every time.

In relation to the electronic function of the digital piano, Patent Laid-Open No. 10-2007-0035340 discloses a keyboard keypad, a memory in which sounds are stored, and a pressure sensing unit that detects and outputs the intensity of pressure generated when a specific key is input on the keyboard keypad. There are two suggestions for adjusting the volume level. In addition, Patent Laid-Open No. 10-2016-59281, an electronic device that can be linked to a digital piano or master keyboard communicates with a device running an application for piano playing practice and a device through a wired/wireless communication network, and according to the device's request A digital piano is provided that includes a web server that provides related data necessary for the execution of an application, a DB server that stores application-related data, and a DB server that provides related data to the web server in response to a request from the web server.

However, the above patent relates to the keyboard of a digital piano or wireless communication with an external device or server of the digital piano, and does not focus on the problem of master and slave boards specific to the digital piano. If this problem is solved, it will be possible to improve the sound expression of the keyboard and communication with external devices and servers.

The present invention has been devised to solve the problems of the prior art and prior patents described above at once.

Therefore, it is an object of the present invention to provide a system and method for enabling a slave board to automatically and accurately recognize its own unique code quickly and accurately in a digital piano, particularly a block-connected digital piano.

In order to achieve the above object, the present invention provides an automatic recognition system for a slave board of a digital piano, wherein the system includes a master board and a plurality of slave boards connected in series, and each control unit is installed on each slave board. A semiconductor device connected to each control unit is installed on each slave board, and each semiconductor device is connected by a series-connected line to indicate a physical property unique to each slave board, and each slave board has the property value It provides a system that automatically recognizes its own code by reading it.

The physical property may be a voltage value.

The semiconductor device may include a diode.

The slave unique code recognized by each slave board may be transmitted to the master board.

The control unit of each slave board includes at least one pair of reception and transmission lines, in which transmission and reception lines are arranged in pairs, and each of the slave boards includes at least two switches connected to each of the reception and transmission lines. and when the slave board recognizes the unique code, the control unit connects the switch to each of the reception line and the transmission line in a normal state to switch to a state in which data is transmitted or received with the master board. may include.
In addition, the present invention is an automatic recognition system for a slave board of a digital piano, wherein the system includes a master board and a plurality of slave boards connected in series, and each slave board is provided with a respective control unit, each slave board A semiconductor element connected to each control unit is installed, and each semiconductor element is connected by a line connected in series to indicate a unique property value to each slave board, and each slave board reads the property value and has its own unique property. The code is automatically recognized, and the slave specific code (Ak) recognized by each slave board is transmitted to the master board, and each slave board uses its own assigned transmission line to provide a slave board specific code and a keyboard specific code ( By transmitting (Ak, Bj) data consisting of Bj) to the master board, the master board (M) recognizes which key of which slave board is pressed, and the control unit of each slave board has a pair of transmission and reception lines arranged in pairs. , at least a pair of reception lines and transmission lines, and each of the slave boards includes at least two switches connected to each of the reception and transmission lines, and the switches are connected to each of the reception and transmission lines in a normal state. and a switch control unit for switching to a state in which data is transmitted or received with the master board by connecting with the master board, and the switch connected to each of the receiving line and the transmitting line is different for each slave board, so that the master board is a slave board We provide a system that recognizes

According to the present invention, the master board in the digital piano can immediately recognize which slave board key is pressed only by receiving data, thereby reducing the load on the master board. It can be sent to , and it has the effect that data processing is quick and reasonable.

1 is a diagram showing a keyboard structure of a digital piano of the prior art;
2 is a diagram showing the electronic structure of a current digital piano;
Fig. 3 is a structural diagram of the electronic system of the digital piano of the present invention;
Fig. 4 is a diagram showing an example of an electronic circuit of a block-type digital piano; and
FIG. 5 is a view continuation to FIG. 4 and structurally included in FIG. 4 .

Each embodiment according to the present invention is merely an example for helping understanding of the present invention, and the present invention is not limited to these embodiments. The present invention may be composed of a combination of at least any one of individual components and individual functions included in each embodiment.

3 is a structural diagram of the electronic system 10 of the digital piano 1 of the present invention.

The electronic system 10 of the present invention includes one master board M, first, second, ... , n-th slave boards (S1, S2, ..., Sn) comprising a slave module (S). Each of the slave boards (S1, S2, ..., Sn) is connected in series, and the first slave board (S1) is directly connected to the master board (M). To each of the slave boards (S1, S2, ..., Sn), each key 100 having jurisdiction is electrically and structurally connected. The number of keys can be made by dividing it into 12, 24 or an appropriate number. In this respect, the digital piano 1 of the present invention can be said to be a piano composed of a plurality of blocks.

Each of the slave boards (S1, S2, ..., Sn) is provided with each control unit (C1, C2, ..., Cn). In addition, semiconductor devices D1, D2, ..., Dn connected to the respective control units C1, C2, ..., Cn are installed on each of the slave boards S1, S2, ..., Sn. The semiconductor devices D1, D2, ..., Dn are connected by a line L from the first slave board S1 to the n-th slave board Sn as shown. When the line L is connected to, for example, a 5V external power source for driving the digital piano 1, the voltages applied to each of the semiconductor elements D1, D2, ..., Dn are different. For example, if the semiconductor device is a diode, the voltage value is D1, D2, … due to intrinsic internal resistance. , which increases with Dn.

In the present invention, the control unit (C1, C2, ..., Cn) of each of the slave boards (S1, S2, ..., Sn) detects and recognizes the voltage value applied to the semiconductor elements (D1, D2, ..., Dn) in real time . The control units C1, C2, ..., Cn refer to respective memories not shown. A unique voltage value corresponding to its own slave board is stored in the memory. Therefore, each slave board (S1, S2, ..., Sn) always has its own code ( Ak) can be found. k is 1, 2, ... It is one of n, and it can be said that it is a code that tells which slave board it is.

As with the existing technology, the controllers C1, C2, …, Cn of each slave board S1, S2, …, Sn recognizes which specific key is pressed on the keyboard under its jurisdiction, and a unique key code (Bj) is saving If there are 12 keys per block, j = 1, 2, … , will be one of 12.

A unique semiconductor device D0 is also installed on the master board M, which is connected to the MCU 20 of the master board M. However, since there is only one master board (M), it is not necessary to provide its own code as much as that of the slave board, and therefore, it can be said that it is not an essential requirement of the present invention.

Again, referring to Figure 3, each slave board (S1, S2, ..., Sn) of the present invention through the respective transmission lines (T1, T2, ..., Tn) the MCU 20 of the master board (M) and connected Each of the slave boards S1, S2, ..., Sn transmits the slave board-specific code and the keyboard-specific code, that is, (Ak, Bj) data to the MCU 20 through a transmission line assigned to it. Then, the master board (M) can immediately recognize which key is pressed only by receiving the data, thereby reducing the load on the master board (M). can be sent.

The slave-specific code does not necessarily mean data that must be actively read, but is a broad concept including, for example, a signal that is switched according to a transmission/reception path of data, as will be described below.

An example of the electronic circuit of the block-type digital piano 1 embodying the above description will be described in detail with reference to FIGS. 4 and 5 . On the assumption that there are three slave boards, FIG. 4 shows the first slave board S1 and FIG. 5 shows the second slave board S2 directly connected to the first slave board S1 of FIG. 4 . The external configuration of the slave boards S1 and S2 is the same.

The master board M and the slave boards S1 and S2 are respectively connected by a connector 30 to form an electrical connection. Each of the semiconductor devices D0, D1, and D2 is installed on the master board M and the slave boards S1 and S2. As shown in the figure, the semiconductor devices are connected by a line L through the connection of the connector 30. consistently connected. Since the semiconductor devices are independently connected to each other in series regardless of other circuits or devices on their own or other boards, it is possible to accurately detect the detection value (voltage value) unique to each slave board without error.

The control unit C1 of the first slave board S1 has a first reception line 500, a first transmission line 502, a second reception line 504, It includes a second transmission line 506 , a third reception line 508 , and a third transmission line 510 . Data is received or transmitted through each line. In addition, the first reception switch control unit 300 , the first transmission switch control unit 302 , the second reception switch control unit 304 , the second transmission switch control unit 306 , and the third reception switch for controlling the switches in response thereto A control unit 308 and a third transmission switch control unit 310 are installed.

A total of six switches are arranged next to the control unit C1, and the first receiving switch 400, the first transmitting switch 402, the second receiving switch 404, and the second transmitting switch 406 are sequentially from the top. , a third receiving switch 408 and a third transmitting switch 410 . The structure of each switch is the same. Normally, the default is to contact NC (normally closed), but when the slave board recognizes its own code, it is switched to contact NO (normally open).

Specifically, when the slave board (S1) recognizes its own code (A1), by driving the first reception and transmission switch control unit (300, 302), the first reception and transmission switch (400, 402) is in contact with NO and , thus, the first reception and transmission lines 500 and 502 can transmit and receive data with the master board (M). Data of the first slave may be transmitted to the master board M through the first transmission line 502 . Conversely, data necessary for the first slave board S1 may be received from the master board M through the first reception line 500 .

At this time, since the remaining four switches of the first slave board S1 are connected to the master board M through NC and are distinguished from the transmission route through NO, the master board M is connected to the first slave board S1 from the The signal can be recognized quickly and easily. This process naturally becomes a process in which the master board (M) recognizes the unique code of the first slave board.
Here, the first reception and transmission switches 400 and 402 are unique switches representing the first slave board S1, and the remaining switches are general switches. When the slave board recognizes its own code, general switches maintain the original state in contact with NC, which is the first connection state, but the unique switch is switched to connect with the second connection state, NO, so that the master board uses the slave board's unique code can be easily recognized. This description also applies to other slave boards below.

The second slave board S2 is the same as the first slave board S1, but when the slave board S2 recognizes its own code A2, the second reception and transmission switch control units 304 and 306 are driven. Thus, the second receiving and transmitting switches 404 and 406 are in contact with NO, and the remaining four switches are connected to the master board M through the NC and distinguished from the transmission route through the NO, so the master board M is easily It can be recognized that the signal is from the second slave board S2 (refer to FIG. 5).

A person skilled in the art will understand that three or more slave modules can be built continuously in this way.
That is, when a plurality of slave boards are connected to the master board and power is applied, the switches 400 and 402 unique to the first slave board become NO, the remaining switches become NC, and the second slave board has its own switch. (404, 406) becomes NO, the remaining switches become NC, the third slave board has its own switch (408, 410) becomes NO, and the remaining switches become NC, so that the master board is simultaneously connected to each slave The board can be automatically and clearly recognized.
If n slave boards are arranged, each slave board will have 2n switches. Although the external structure of each slave board looks the same, it can be understood that data transmitted to the master board is different according to the self-recognition of the slave board.

4 shows an example of a circuit diagram, and of course, various changes are possible at the level of those skilled in the art, such as leaving only a switch related thereto on each slave board and deleting the other switches.

Although the embodiment of the present invention has been described above, it does not limit the present invention, and various modifications and variations are possible with respect to the present invention.

It is apparent that the scope of the present invention extends to the same or equivalent scope as the claims described below.

Claims (6)

An automatic recognition system for a slave board of a digital piano, the system comprising a master board and a plurality of slave boards connected in series,
Each control unit is installed on each slave board, and a semiconductor element connected to each control unit is installed on each slave board. In other words, each slave board automatically recognizes its own code by reading the physical properties and
The slave unique code (Ak) recognized by each slave board is transmitted to the master board,
Each slave board transmits (Ak, Bj) data consisting of the slave board specific code and the keyboard specific code (Bj) to the master board through the transmission line assigned to it, so that the master board (M) Recognizes that this is pressed,
The control unit of each slave board is:
at least one pair of reception and transmission lines, in which transmission and reception lines are arranged in pairs;
Including a switch control unit;
Each of the slave boards further includes a plurality of switches connected to each of the at least one pair of reception and transmission lines,
The plurality of switches includes a unique switch unique to each slave board, and a general switch that is not a unique switch,
When the slave board recognizes the unique code (Ak), the switch control unit switches the unique switch to a second connection state different from the first connection state of the general switch.
A system in which the master board recognizes each slave board by receiving a signal from a unique switch unique to each slave board. The method of claim 1,
wherein the physical property is a voltage value. 3. The method of claim 2,
wherein the semiconductor device comprises a diode.



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